CN207063107U - It is a kind of have can reverse-filling and water seal be not easy dry floor drain - Google Patents

Abstract

The utility model disclose it is a kind of have can reverse-filling and water seal be not easy dry floor drain, including floor drain housing and the sealing structure for water being arranged in floor drain housing, sealing structure for water includes water seal outer sleeve, water seal inner sleeve, lower floating head and upper floating head, water seal inner sleeve top and floor drain cage connection, its bottom is suspended on above bottom, water seal outer sleeve bottom is arranged on floor drain outer casing bottom, and water seal inner sleeve is inserted in water seal outer sleeve inner chamber, and vertical water channel and its upper port and lower port are formed between the inside and outside set of water seal.Upper floating head and lower floating head are ring plate shape, it is set in water seal and puts and can be lifted along water seal outer wall of inside race, upper floating head activity covering water channel upper port, mounting structures are set between water seal outer sleeve and water seal inner sleeve and in the lower port corresponding position of vertical water channel, lower floating head puts up the unidirectional blocking water channel lower port on mounting structures, water seal outer sleeve, water seal inner sleeve, on closed vertical water seal is formed between floating head and lower floating head.

Description

It is a kind of have can reverse-filling and water seal be not easy dry floor drain

Technical field

A kind of floor drain of architectural drainage system is the utility model is related to, having more particularly, to one kind can reverse-filling and water seal It is not easy dry floor drain.

Background technology

Floor drain is to commonly use drainage element in building field used by drainage system, and the purposes of existing floor drain is to be used for draining The anti-waste gas of deodorization in system, and the cleanout for preventing drain line blockage of barrier solid refuse debris into drainage system are made With floor drain is to be entered using sealing structure for water to completely cut off the waste gas and foul smell in drainage pipeline, barrier cockroach etc. by drainage pipeline It is indoor.

At present, the producer of many production co-layer draining products is all in effort, city for exploitation new same-layer floor drain Occur a variety of floor drains for co-layer draining on face, such as：Quiet water-seal horizontal-discharge floor drain, carry water seal overflow-proof side wall floor drain, from The products such as water seal Anti-flood drain with multiple draining pipe, floating cover Anti-flood drain with multiple draining pipe are protected, although these products are to a certain extent Meet the functional requirement of floor drain, still, still suffer from problems with：

1. the water seal sealing of floor drain is bad, without anti-dry effect, the water body of water seal is for a long time without the situation of water supplement Under, easily evaporation, Anti-bad-smell anti-insect effect can not be played.

2. water seal height is restricted, existing floor drain is often thicker, and building structure and standpipe position are required, and is installing Shi Buneng flexible arrangements, therefore, the water seal height of floor drain can be limited by floor drain thickness requirement.

3. installation, maintenance is inconvenient：Existing various floor drains are due to can not completely disassemble or only partly disassemble, during use Floor drain is particularly pipeline when blocking in itself, cannot carry out disassembling maintenance（Dredging）And reinstall to use, it can only destroy Property remove, order installation and repair very inconvenient.

4. anti-effect returning water poor performance, although most of existing floor drains all consider anti-effect returning water in design, due to floor drain The structure for hooking hair and fiber on internal drainage passage be present, make anti-effect returning water fail because having hooked hair and fiber during use.

5. without barrier, smoothly drainage effect is poor：Ibid, originally just narrow and small drainage channel spatially, during use because Structure and the barrier for having hooked hair and fiber, and make discharge area further reduce, therefore the effect of smooth draining can not be reached.

To solve the above problems, the present inventor provides one kind in Chinese utility model patent CN201310650399.3 Long-acting totally-enclosed water-sealing stinking-proof same-layer floor drain, it includes same layer floor drain body, floor drain grate and sealing structure for water, the water seal Structure is to be nested the vertical water annulus formed with water seal inner sleeve by water seal outer sleeve and formed, lower end and the floor drain master of water seal inner sleeve A protection float with air cavity is set up between body bottom surface in space, the protection float main body is an interior intracavitary with water seal outer sleeve The card that footpath is adapted, card are peripherally distributed several balance pipes, and in-between bossing is air cavity, and projection is in the water seal In set, protection float is used to float the lower port for closing water seal inner sleeve using water buoyancy, meanwhile, one is set above water seal outer sleeve The annular water seal panel being placed on water seal outer wall of inside race, the top of water seal outer sleeve is covered in, can the vertical water annulus of unidirectional blocking Upper port, it can be held up by current in draining and open, close during no draining, and twice sealing is formed together with protection float Structure, water body and bottom water body in vertical water annulus can be retained for a long time, reach the purpose of permanent water seal, while can be to prevent Only pour in down a chimney.

The present inventor subsequently provides another improved long-acting totally-enclosed water seal in CN201420755896.X and prevented again Smelly same-layer floor drain, different from above-mentioned floor drain is, it instead of protection float with spring kickboard, to ensure that protection is floating Son can float all the time when without draining closes water seal inner sleeve lower port, and the spring kickboard includes sheet kickboard and spring, spring position Between bottom bottom surface and kickboard, two sealings are formed together with the water seal panel of upper port for unidirectionally sealing vertical water annulus Structure, muchly to retain the water body in vertical water annulus.

Although the floor drain of the above two sealing structure for water of the present inventor's research and development all realizes water seal resistance and reverse-filling function, And the vertically annular water seal of one of one-way enclosed type is provided with, is volatilized with the water in preventing water from sealing so that even if floor drain is long-term Interrupt and use, water seal is not all allowed volatile dry, can persistently play effectiveness.But can be fluctuated due to floor drain all uses Floater Structure closes the lower port of vertical annular water seal, and this Floater Structure brings problems with：

1. be easy to block, lower water speed it is slow：It is easy to leak into float underlying space by silt, it is difficult to discharge and deposit it In, cause the floating stroke of float to reduce even 0 in the course of time.Due to most of houses all can advanced luggage repair, Ran Houzai Come into operation, cleaning finishing there are a large amount of silts to be discharged into sewer by floor drain with being often difficult to avoid that when live, and this causes State two kinds of floor drain patented technologies be difficult to avoid that after having fitted up, the float distance of run of floor drain is just significantly reduced, and causes floor drain difficult To allow somewhat larger swill by easily blocking, lower water speed is always very slow.

2. float be difficult to persistently keep fluctuate it is smooth：Because float needs to be adapted to so as to steady with the cylindrical wall of bottom Ground fluctuates and carries out vertical water channel lower port closing, and the gap of float gabarit and bottom cylindrical wall is smaller, is such as used for kitchen During basin, a large amount of greasy dirts are readily adsorbed on the piece surface of floor drain, and the greasy dirt on attachment feature surface can be more next over time It is more sticky, successfully fluctuated so as to influence float, if dry weather or disabling basin for some time, float can also be because The greasy dirt on surface solidifies and is fixedly arranged in bottom and can not move, and causes float to fail.

3. closing water seal is easily failed：Because above-mentioned 2 problems can all cause float to lose effectiveness, once and float loses Effect, then the lower sealing of closed water seal can not just be closed with float, so as to lead to not to be formed enclosed water seal, lose length Phase keeps the effectiveness of water seal.

Utility model content

One of the purpose of this utility model aim to provide it is a kind of have can reverse-filling and water seal be not easy dry floor drain, the ground Leakage can be effectively formed closed water seal, play effective odor-proof, cockroach proof, reverse-filling and prevent dry effect.

First purpose of the present utility model is realized by following technical measures：Can reverse-filling and water seal be not easy to do The floor drain to dry up, including floor drain housing and the sealing structure for water being arranged in floor drain housing, the floor drain housing is by floor drain shell and ground Leak grate to form, the side wall of the floor drain shell has at least one drainage pipeline joint, and the sealing structure for water is included outside water seal Set, water seal inner sleeve and upper floating head, the water seal inner sleeve top and floor drain cage connection, its bottom are then suspended on the top of bottom, The water seal outer sleeve bottom is arranged on floor drain outer casing bottom, its upper opening, the inner chamber of the water seal inner sleeve insertion water seal outer sleeve In, a vertical water channel and its upper port and lower port are formed between the inside and outside set of water seal, the upper floating head set is ring plate shape, It is located in water seal and puts and can be lifted along water seal outer wall of inside race, it is perpendicular to close that the upper floating head activity is covered in water seal outer sleeve top To the upper port of water channel, it is characterized in that, the sealing structure for water also includes the lower floating head of ring plate shape, and it is also set in water seal and put And can be between the water seal outer sleeve and water seal inner sleeve and corresponding in the lower port of vertical water channel along water seal outer wall of inside race oscilaltion Opening position sets the mounting structures of lower floating head, and the lower floating head is put up on mounting structures to close vertical water mainly by deadweight The lower port in road, so as to water seal outer sleeve, water seal inner sleeve, on closed vertical ring-type water seal is formed between floating head and lower floating head, Play effective odor-proof, cockroach proof, reverse-filling, anti-dry effect.

Upper floating head described in the utility model closes the upper port of vertical water channel, and lower floating head closes vertical water channel lower port, When the water of required discharge is flowed into water seal inner sleeve by the grate of floor drain, with increasing for rate of water added, in impulse force/buoyancy of current Under effect, lower floating head lifts up, and the lower port of vertical water channel is opened, and water enters in vertical water channel, and then draining, which is held up, floats Lid, make draining to be smoothly through sealing structure for water and enter in shell drain chamber and enter from discharge outlet in drainage pipeline.Work as draining Drain into when being only capable of being filled into concordant with the top of water seal outer sleeve, upper floating head drops to water again because water body can not support its gravity The top of overcoat is sealed, resets the upper port for closing vertical water channel again；And floated downward when the water in water seal inner sleeve is not enough to support Gai Shi, lower floating head reset and dropped on mounting structures, are re-closing off the lower port of vertical water channel.Floated downward due to of the present utility model Lid is to be held up to float by current/water body to open vertical water channel lower port, even if so in draining containing silt or other grades compared with The solid refuse debris of weight, the floating stroke of lower floating head is not interfered with yet, and under water body and its self gravitation double action, Lower floating head can also close vertical water channel lower port for a long time, and vertical ring-type water seal can be sealed up for safekeeping, can more effectively kept Water seal, play with long-acting every smelly, insect prevention, anti-dry effect, and upper and lower floating head constitutes two check valves, forms two Anti-effect returning water defence line.

As one embodiment of the present utility model, the mounting structures are support bulge loop, and the support bulge loop can be The radially-protruding bulge loop set on water seal outer sleeve inwall along its interior girth；Water seal outer sleeve and water seal inner sleeve can also be provided in Between and the bulge loop of vertical projections that is fixed on floor drain outer casing bottom, the bulge loop can be from floor drain outer casing bottom score of the game to arch Rise and formed, can also be made up of the vertical cylinder being fixed on floor drain outer casing bottom.

Further, the utility model can also cover in water seal sets inner edge mounting structures, the inner edge support knot Structure is to be arranged on water seal outer wall of inside race and correspond to the footpath set along water seal inner sleeve outer perimeter at upper port or lower end open height To the inward flange of stretching, the inward flange flushes with the support bulge loop, for the inward flange of the upper and lower covering of support, makes covering Or lower floating head can be flatly put up in upper port or lower port, to strengthen the reliability of upper and lower floating head closing.It is in addition, described The inward flange of upper port can be the i.e. multiple projections of flange of annular flange or interruption.

As a preferred embodiment of the present utility model, the water seal outer sleeve is inverted bowl structure, i.e., outside water seal Cover the big port inner diameter thereon of intracavity diameter of middle and lower part, so that between water seal outer sleeve inwall and water seal inner sleeve space compared with Greatly, and the internal diameter of lower port and the upper port internal diameter are same or similar, i.e., lower port bore is also significantly less than vertical water channel Cavity internal diameter, so as to current entrainment of miscellaneous bits of larger solid refuse etc. be easily accessible in vertical water channel, and be not easy by under Floating head barrier is trapped near lower port, the unobstructed of floor drain is so more beneficial for, to reduce the water channel by the miscellaneous bits of solid refuse The probability of blocking.

Further, the water seal inner sleeve lateral wall sets stop bit bulge loop or uniform several stop bit projections, as under The floating of floating head is spacing, prevent from floating downward cover the upper port for floating to vertical water channel hinder water outlet.

The distance between water seal inner sleeve lower end described in the utility model and floor drain outer casing bottom do not have hard requirement, as long as Meet current excessively stream.But in the utility model, in order that floor drain is made than relatively thin, the water seal inner sleeve bottom with Distance is advisable with the mm of 7 mm~20 between floor drain outer casing bottom, preferably 8mm ~ 10mm.

Compared with prior art, the utility model has the advantages that：

(1) effectively seal and long-acting every smelly：The utility model is abandoned vertical water channel lower port capping of the prior art and adopted With the form of float, thinking is separately warded off, changes the form that float is the lower floating head, lower floating head centralized positioning and in self gravitation and perpendicular The lower port of vertical water channel is closed under to water channel water body Action of Gravity Field, not only enormously simplify the movable closure construction of lower port, And use is more reliable, it is not easy to influenceed by solid refuse and food waste greasy dirt and cause lower floating head to fail, and vertical water Only need a little water just can form effective water seal in road so that vertically water channel is upper and lower can be under the closing of upper and lower floating head It is easy to keep effective water seal for a long time, and lower floating head is increased together " check valve ", so that the utility model can be more again more It is long-acting every smelly, cockroach proof, reverse-filling, anti-dry effect to effectively act as.

It is not easily blocked：Lower floating head in sealing structure for water of the present utility model is on the lower on water current/water body impulse force and buoyancy Float so as to open vertical water channel lower port, even if so also will not in draining containing the material that silt, swill etc. are heavier By the floating stroke of floating head under the influence of these materials, lower port bore and vertical water channel cavity difference in internal diameters need to only be designed suitable When even somewhat larger swill is by will not also block, lower water speed is unaffected.

Lower floating head is not easy to fail：Guide frame of the utility model using water seal inner sleeve as lower floating head, coordinate mounting structures And inward flange, thus lower floating head can have certain interval/spacing between water seal inner sleeve or water seal outer sleeve inwall, its is inside and outside Without being adapted with the cylindrical inner wall of water seal outer wall of inside race or water seal outer sleeve, lower floating head can be neatly along water seal inner sleeve at edge Outer wall fluctuates, and is not easy to make lower floating head fail even if larger material enters, and because water seal can keep effective for a long time, Also so that lower floating head will not because of piece surface adhere to greasy dirt it is more and more sticky and under the influence of floating head smoothly fluctuate, more Be not in greasy dirt solidification and cause the phenomenon that lower floating head failure occurs.

(4) easy care：The housing of each part of sealing structure for water of the present utility model and floor drain is to be detachably connected, not only Convenient installation, and cleaning, cleaning and the maintenance of particularly convenient floor drain.

Brief description of the drawings

Fig. 1 is the sectional view of the floor drain of the utility model embodiment one.

Fig. 2 is the sectional view of the floor drain of the utility model embodiment two.

Fig. 3 is the top view of the floor drain of the utility model embodiment three.

Embodiment

Embodiment one：

Floor drain shown in Fig. 1 is one embodiment of the present utility model, including floor drain shell 7, top cover 8 and floor drain grate 1 Form.Groove-like is made in the intracavity bottom of floor drain shell 7, and its side wall has a drainage pipeline joint 2, is used for and drainage pipeline Connection.The installation position of the top cover 8 for location and installation is provided with the upper end open of floor drain shell 7.To adapt to floor drain installation Slab thickness and the different situation of co-layer draining pipe fitting depth, it is provided between floor drain grate 1 and the installation position of top cover 8 adjustable The tubulose grate connector 11 of height, the outer wall of grate connector 1 have some annular grooves, when can be installed according to floor drain The grate connector 11 of proper height is highly intercepted, makes that there is 1 ~ 2cm spacing between floor drain grate 1 and water seal inner sleeve 4.

Sealing structure for water includes water seal outer sleeve 3, water seal inner sleeve 4, lower floating head 6 and upper floating head 5, the top of water seal inner sleeve 4 and floor drain Shell 7 is connected, and its bottom is then suspended on the top of outer casing bottom, and the sealed bottom of 3 bottom floor drain shell of water seal outer sleeve 7 is installed, its Upper opening, water seal inner sleeve 4 are inserted in the inner chamber of water seal outer sleeve 3, and a vertical water annulus is formed between the inside and outside set of water seal And its upper port and lower port, upper floating head 5 and lower floating head 6 are ring plate shape, are each provided in water seal inner sleeve 4 and can be along water seal inner sleeve 4 outer walls lift.The upper activity of floating head 5 is covered in the top of water seal outer sleeve 3 to close the upper port of vertical water annulus.Water seal outer sleeve 3 The mounting structures of lower floating head 6, lower floating head are set between water seal inner sleeve 4 and in the lower port corresponding position of vertical water annulus 6 put up to close the lower port of vertical water channel on mounting structures mainly by deadweight, so as in water seal outer sleeve 3, water seal inner sleeve 4th, closed vertical ring-type water seal is formed between upper floating head 5 and lower floating head 6, play effective odor-proof, cockroach proof, reverse-filling, Prevent dry effect.

Mounting structures are support bulge loop 12, to be arranged between water seal outer sleeve 3 and water seal inner sleeve 4 and being fixed on floor drain shell The bulge loop of vertical projections on 7 bottoms, the bulge loop are locally arched upward and formed upwards by the bottom of floor drain shell 7.Set in water seal inner sleeve 4 Put inner edge mounting structures, for be arranged on the outer wall of water seal inner sleeve 4 and at corresponding upper port and lower end open height along water seal inner sleeve 4 The radially-protruding upper inward flange 14 and lower inward flange 13 that outer perimeter is set.Wherein, lower inward flange 13 flushes with support bulge loop, uses The inward flange of floating head 6 under support, lower floating head 6 is set flatly to put up in lower port；Upper inward flange 14 pushes up with water seal outer sleeve 3 Portion flushes, for the inward flange of the floating head 5 in support, to strengthen the reliability of upper and lower floating head closing.The upper convex of upper port Edge 14 can be the i.e. multiple projections of flange of annular flange or interruption.

Water seal outer sleeve 3 is inverted bowl structure, i.e., the intracavity diameter of the middle and lower part of water seal outer sleeve 3 is big thereon in port Footpath, so that space is larger between the inwall of water seal outer sleeve 3 and water seal inner sleeve 4, and the internal diameter of lower port and upper port internal diameter phase With or it is close so that current entrainment of miscellaneous bits of larger solid refuse etc. be easily accessible in vertical water annulus, and do not allow Easily it is trapped in by the barrier of lower floating head 6 near lower port, is so more beneficial for the unobstructed of floor drain, it is miscellaneous by solid refuse to reduce water channel Consider the probability blocked to be worth doing.

The lateral wall of water seal inner sleeve 4 sets stop bit bulge loop 9, and the floating as lower floating head 6 is spacing, prevents lower floating head 6 from floating to The upper port of vertical water annulus hinders water outlet.

The distance between the lower end of water seal inner sleeve 4 and the bottom of floor drain shell 7 do not have hard requirement, as long as meeting current excessively stream i.e. Can.But in the utility model, in order that floor drain is made than relatively thin, between the bottom of water seal inner sleeve 4 and the bottom of floor drain shell 7 Distance is advisable with the mm of 7 mm~20, preferably 8mm ~ 10mm.

The outer shroud edge of top cover 8, which is turned over downwards, to be formed the upper end open of flanging and floor drain shell 7 and forms removable sealed connection. The top surface of top cover 8 is provided for installing the annular mounting groove of grate connector 11, and the lower end of grate connector 11 is removably mounted at In the annular mounting groove.The inner annular edge of top cover 8 has heavy side as the installation position of water seal inner sleeve 4.The upper limb of water seal inner sleeve 4 tool of tubular There is flanging, the outward flange of flanging is removable to be sealedly attached on the heavy side of top cover 8.

When in use, upper floating head 5 closes the upper port of vertical water annulus, and lower floating head 6 closes vertical water annulus lower end Mouthful, when the water of required discharge is flowed into water seal inner sleeve by floor drain grate 1, with increasing for rate of water added, in the impulse force/floating of current Under power effect, lower floating head 6 lifts up, and the lower port of vertical water annulus is opened, and water enters in vertical water annulus, then arranges Water holds up upper floating head 5, makes draining to be smoothly through sealing structure for water and enters in shell drain chamber and enter drainpipe from discharge outlet In road.When draining, which drains into, to be only capable of being filled into concordant with the top of water seal outer sleeve 3, upper floating head 5 can not support its gravity because of water body And the top of water seal outer sleeve 3 is dropped to again, the upper port for closing vertical water annulus is resetted again；And when in water seal inner sleeve 4 Water when being not enough to floating head 6 under support, lower floating head 6 resets and dropped on mounting structures, is re-closing off vertical water annulus Lower port.Because lower floating head 6 of the present utility model is to hold up to float by current/water body to open vertical water annulus lower port, Even if so in draining containing silt or other etc. heavier solid rubbish incidental, do not interfere with the floating stroke of lower floating head 6 yet, And under water body and its self gravitation double action, lower floating head 6 can also close vertical water annulus lower port for a long time, erect It can be sealed up for safekeeping to ring-type water seal, can more effectively keep water seal, be played with long-acting every smelly, insect prevention, anti-dry effect, and And upper and lower floating head constitutes two check valves, two anti-effect returning water defence lines are formed.

Embodiment two：

Unlike embodiment one：As shown in Fig. 2 water seal outer sleeve 3 is the vertical straight tube that internal diameter is more than water seal inner sleeve 4 Body, its bottom are connected with the sealed bottom of floor drain shell 7, and the lower tube section of water seal inner sleeve 4 stretches into intracavitary in water seal outer sleeve 3.In vertical ring Opening position corresponding to the lower port of shape water channel, the inwall of water seal outer sleeve 3 is provided with radially-protruding bulge loop along interior girth, convex as support Ring 31, the support bulge loop 31 flush with the inward flange 13 in water seal inner sleeve 5.In the present embodiment, the external diameter of lower floating head 6 is less than water The internal diameter of overcoat 3 is sealed, makes that there is spacing between the outline edge of lower floating head 6 and the inwall of water seal outer sleeve 3, as current by floating downward Passage between lid 6 and water seal outer sleeve 3.The outward flange of lower floating head 6 and inward flange are overlapped on support bulge loop 31 and lower convex respectively On edge 13, vertical water annulus lower port is closed.

Embodiment three：

Unlike embodiment one：As shown in figure 3, water seal outer sleeve 3 is the vertical straight tube that internal diameter is more than water seal inner sleeve 4 Body, its bottom are connected with the sealed bottom of floor drain shell 7, and the lower tube section of water seal inner sleeve 4 stretches into intracavitary in water seal outer sleeve 3.Floor drain shell 7 Interior to set vertical cylinder 71, its top surface flushes with the lower inward flange 13 in water seal inner sleeve 5, the outward flange of lower floating head 6 and inward flange It is overlapped on respectively on cylinder 71 and lower inward flange 13, the vertical water annulus lower port of unidirectional blocking.

Above example be for understanding that the utility model is used, be not to limitation of the present utility model, this area it is general Logical technical staff can also make a variety of changes or modification on the basis of technical scheme described in claim, these changes or Modification should be understood to still fall within the scope of protection of the utility model.For example, by the water seal inner sleeve of split in embodiment and water seal Disjunctor form is made in overcoat；Vertical water channel in addition to vertical water annulus form or interruption vertical water annulus shape Formula, or cross section are the vertical water channels of other shapes；The shell of floor drain housing and the combining form of bottom be changed into Shang Gai with it is outer Combining form of shell etc..

Claims (9)

1. it is a kind of have can reverse-filling and water seal be not easy dry floor drain, including floor drain housing and the water that is arranged in floor drain housing Seal structure, the floor drain housing are made up of floor drain shell and floor drain grate, and the side wall of the floor drain shell has at least one row Water pipe pipeline joint, the sealing structure for water include water seal outer sleeve, water seal inner sleeve and upper floating head, the water seal inner sleeve top with outside floor drain Shell is connected, and its bottom is then suspended on the top of bottom, and the water seal outer sleeve bottom is arranged on floor drain outer casing bottom, and its top is opened Mouthful, in the inner chamber of the water seal inner sleeve insertion water seal outer sleeve, a vertical water channel and its upper end are formed between the inside and outside set of water seal Mouth and lower port, the upper floating head set is ring plate shape, is located in water seal and puts and can be lifted along water seal outer wall of inside race, the floating Lid activity is covered in water seal outer sleeve top to close the upper port of vertical water channel, it is characterized in that, the sealing structure for water also includes ring The lower floating head of sheet, it, which is also set in water seal, puts and can be along water seal outer wall of inside race oscilaltion, the water seal outer sleeve and water Seal between inner sleeve and the mounting structures of lower floating head are set in the lower port corresponding position of vertical water channel, the lower floating head is by deadweight Put up to close the lower port of vertical water channel on mounting structures, so as to water seal outer sleeve, water seal inner sleeve, on floating head and float downward Closed vertical ring-type water seal is formed between lid.

2. have according to claim 1 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, the mounting structures For support bulge loop.

3. have according to claim 2 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, the support bulge loop For the radially-protruding bulge loop set on water seal outer sleeve inwall along its interior girth.

4. have according to claim 2 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, the support bulge loop For the bulge loop for the vertical projections for being arranged between water seal outer sleeve and water seal inner sleeve and being fixed on floor drain outer casing bottom, the bulge loop is Arched upward and formed upwards by floor drain outer casing bottom score of the game, or the vertical cylinder by being fixed on floor drain outer casing bottom is formed.

5. have according to claim any one of 2-4 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, in water Put in envelope and inner edge mounting structures be set, the inner edge mounting structures for be arranged on water seal outer wall of inside race and corresponding upper port or The radially-protruding inward flange set along water seal inner sleeve outer perimeter at the open height of lower end, the inward flange and the support bulge loop are neat It is flat, for the inward flange of the upper and lower covering of support, covering or lower floating head is flatly put up in upper port or lower port.

6. have according to claim 5 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, the water seal outer sleeve For inverted bowl structure, i.e. the big port inner diameter thereon of the intracavity diameter of water seal outer sleeve middle and lower part, and the internal diameter of lower port with The upper port internal diameter is same or similar.

7. have according to claim any one of 1-4 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, it is described Water seal outer sleeve is inverted bowl structure, i.e. the big port inner diameter thereon of the intracavity diameter of water seal outer sleeve middle and lower part, and lower port Internal diameter and the upper port internal diameter it is same or similar.

8. have according to claim any one of 1-4 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, it is described Water seal inner sleeve lateral wall sets stop bit bulge loop or uniform several stop bit projections, and the floating as lower floating head is spacing, prevents from floating downward Cover the upper port obstruction water outlet for floating to vertical water channel.

9. have according to claim any one of 1-4 can reverse-filling and water seal be not easy dry floor drain, it is characterized in that, it is described Distance is the mm of 7 mm~20 between water seal inner sleeve bottom and floor drain outer casing bottom.