CN111288225A

CN111288225A - Fixing device of drainer

Info

Publication number: CN111288225A
Application number: CN202010224536.7A
Authority: CN
Inventors: 罗奇辉
Original assignee: 罗奇辉
Priority date: 2019-05-06
Filing date: 2020-03-26
Publication date: 2020-06-16
Also published as: CN211821090U

Abstract

The invention belongs to the technical field of drainers, in particular to a fixing device of a drainer, which comprises a drainer shell which is inserted on a water storage container in a penetrating way, wherein a sealing ring and a self-locking sleeve are sleeved on the drainer shell, and the sealing ring is respectively abutted against the water storage container and the self-locking sleeve; one end of the self-locking sleeve is of a cone structure with the outer diameter of the end part larger than that of the middle part, and the end is divided into a plurality of flaps by gaps along the circumferential direction; the self-locking sleeve is screwed with the spiral sleeve, the spiral sleeve is screwed in towards the direction of the petals and is abutted against the outer wall surfaces of the petals, and then the petals tightly hold the drainer shell along the radial direction inwards. The upper surface of the sealing ring is tightly attached to the outer wall surface of the water storage container through the self-locking sleeve, so that the water storage container is sealed with the shell of the drainer; the valve plates tightly hold the drainer shell by screwing in the screw threads of the spiral sleeve, so that the self-locking sleeve is tightly connected with the drainer shell, and the connection is stable and reliable and is not easy to loosen.

Description

Fixing device of drainer

The technical field is as follows:

the invention belongs to the technical field of drainers, and particularly relates to a fixing device of a drainer.

Background art:

a general water storage container (such as a sink for kitchen, a washbasin for toilet, etc.) has a water outlet hole at the middle, and a drainer is hermetically installed in the water outlet hole and connected to a sewer pipe. The sealing performance between the drainer and the drain hole is very important, and if the sealing performance is not good, sewage in the water storage container is easy to leak out.

In the prior art, the drainer has the following problems:

firstly, the installation of the drainer is generally realized by connecting the drainer with an external thread and a nut thread, and because the thread is processed on the surface of the drainer, water flows along the external thread in actual use, so that the sealing effect is difficult to achieve, and only methods such as raw rubber belts, glass cement and the like can be used;

secondly, most of actual water draining devices are metal, and numerical control cutter loss exists in thread machining, so that machining sizes are different, the phenomenon of tooth slipping is easy to occur in actual use, connection fastening is not ideal, and water cannot be sealed;

thirdly, as the drainer needs to process threads, the longer the length of the threads processed in the thread processing process, the larger the eccentricity of the thread processing, namely the thread length of the drainer has limitation, and the longer the length of the drainer, the more difficult the processing and the labor hour are, therefore, the thread length of the drainer on the market is basically about 8cm, but when the thickness of some basins exceeds 7cm, the length required by the threads is not enough, and the common drainer is basically difficult to assemble and fix;

fourth, the washbasins on the market can be divided into two types of overflow holes and no overflow holes, and in order to adapt to different types of washbasins, correspondingly, the drainer also is divided into two types of overflow holes and no overflow holes, so that manufacturers usually store the overflow hole type and the no overflow hole type for the drainer of the same model, and the drainer is inconvenient to store, has small storage capacity, and has large storage space.

The invention content is as follows:

the fixing device of the drainer is convenient to mount by hands, universal with or without overflow holes, stable and firm in connection, good in water sealing effect, free of machining threads on the drainer and capable of designing the length of the drainer at will.

The invention is realized by the following steps:

a fixing device of a drainer comprises a drainer shell which is inserted on a water storage container in a penetrating way, wherein a sealing ring and a self-locking sleeve are sequentially sleeved on the drainer shell which is positioned below the water storage container from top to bottom, and the sealing ring is respectively abutted against the water storage container and the self-locking sleeve; one end of the self-locking sleeve is of a cone structure with the outer diameter of the end part larger than that of the middle part, and the end is divided into a plurality of flaps by gaps along the circumferential direction; the self-locking sleeve is in threaded connection with a spiral sleeve with internal threads through external threads, the spiral sleeve is screwed in towards the direction of the flaps and is abutted against the outer wall surfaces of the flaps, the flaps further inwards hold the drainer shell along the radial direction, and the side wall of the drainer shell is a smooth surface without an overflow hole;

or the side wall of the drainer shell is provided with an overflow hole which is positioned in the water storage container;

or the side wall of the drainer shell is provided with an overflow hole which is positioned below the water storage container, and the inner wall surface of the sealing ring completely covers the overflow hole.

In the fixing device for the drainer, the flap is the upper end of the self-locking sleeve, and when the flap radially and inwards embraces the drainer shell, the upper end surface of the spiral sleeve is in abutting connection with the lower surface of the sealing ring.

In the fixing device for the drainer, the inner hole of the self-locking sleeve is a step hole, the inner diameter of the upper end of the self-locking sleeve is larger than that of the lower end of the self-locking sleeve, a positioning step is formed, and the inner edge of the sealing ring extends downwards to the inner hole of the upper end of the self-locking sleeve to form a sealing sleeve;

or the sealing ring comprises a sealing ring and a sealing washer which are stacked from top to bottom, the inner edge of the sealing washer extends downwards to an inner hole at the upper end of the self-locking sleeve to form a sealing sleeve, and the lower end face of the sealing washer is connected with the upper end face of the spiral sleeve in an abutting mode;

or the sealing ring comprises a sealing ring and a sealing washer from top to bottom, the inner edge of the sealing washer extends downwards to an inner hole at the upper end of the self-locking sleeve to form a sealing sleeve, a positioning clamping groove is formed in the upper end surface of the sealing washer, and the lower end of the sealing ring is clamped in the positioning clamping groove;

or the sealing ring comprises a sealing ring and a sealing sleeve which are stacked from top to bottom, the sealing sleeve is positioned in an inner hole at the upper end of the self-locking sleeve, and the lower end face of the sealing ring is connected with the upper end face of the spiral sleeve in an abutting mode.

In the fixing device for the drainer, the upper end surface of the sealing ring is a conical surface with a radius which is small at the top and large at the bottom, and the conical surface of the sealing ring is connected with the lower end surface of the water storage container in an abutting mode.

In the fixing device for the drainer, the lower end face of the sealing sleeve abuts against the positioning step, and the height of the sealing sleeve is greater than or equal to the depth from the upper end face of the self-locking sleeve to the positioning step.

In the fixing device of the drainer, the outer wall surface of the flap is provided with a thread bulge which can be matched with the internal thread of the spiral sleeve.

In the fixing device for the drainer, the upper end part of the spiral sleeve is provided with the annular convex edge, the outer edge of the annular convex edge extends upwards to form the annular baffle plate, the sealing ring is arranged in the annular baffle plate, and the side wall surface of the sealing ring is abutted to the inner side surface of the annular baffle plate.

In the fixing device of the drainer, the upper surface of the annular convex edge is provided with a propping convex strip which is butted and connected on the lower end surface of the sealing ring.

In the fixing device of the drainer, the abutting convex strips are of annular structures, and more than two abutting convex strips are arranged at equal intervals along the radial direction of the spiral sleeve.

In the fixing device for the drainer, a plurality of reinforcing ribs are circumferentially arranged between the lower surface of the annular convex edge and the outer wall surface of the spiral sleeve.

In the fixing device for the drainer, the lower end of the self-locking sleeve extends downwards to form a connecting part, and the connecting part is fixed with the upper port of the drainer through external threads.

In the fixing device for the drainer, a plurality of holding planes are arranged on the outer side wall of the connecting part along the circumferential direction of the connecting part.

Compared with the prior art, the invention has the outstanding advantages that:

1. the upper surface of the sealing ring is tightly attached to the outer wall surface of the water storage container through the self-locking sleeve, so that the water storage container is fixedly connected with the shell of the drainer; and screw in with the help of the screw thread of helical casing and make the lamella hold down the hydrophone casing tightly, realize the fastening connection of auto-lock sleeve and hydrophone casing down, it need not to seal with the help of glass glues and handles, can bare-handed installation, and easy operation is convenient, connect stably, reliably, not become flexible.

2. The invention can make the lower water device shell with the overflow hole be respectively suitable for the water storage container with the overflow hole and the water storage container without the overflow hole, so that in the actual production and processing, manufacturers only need to produce and store the lower water device shell with the overflow hole.

3. Compared with the prior art that the sewer pipe is connected with the sewer casing, the length of the sewer casing is not limited by the processing length of the thread, the length of the sewer casing can be designed randomly according to actual needs, the length and materials of the sewer casing are effectively shortened, the processing cost is reduced, the processing difficulty is reduced, and the universality of the sewer is improved;

4. compared with the prior art, the end necking of the drainer shell has strong anti-explosion performance, because the end of the drainer shell in the prior art needs to be necked to 32mm through thermal expansion and cold contraction before the outer thread is processed, and the necking length is often 8-10mm according to the processing height of the outer thread, and the necking length is more likely to crack under the influence of material factors.

Description of the drawings:

FIG. 1 is a schematic cross-sectional view of the first embodiment of the present invention;

FIG. 2 is a perspective view of a self-locking sleeve according to a first embodiment of the present invention;

FIG. 3 is a perspective view of a spiral sleeve according to a first embodiment of the present invention;

fig. 4 is a perspective view of a self-locking sleeve according to a second, third, fourth and fifth embodiment of the present invention;

fig. 5 is a perspective view of the spiral sleeve of the second, third, fourth and fifth embodiments of the present invention;

fig. 6 is a perspective view of a sealing gasket according to a second and third embodiments of the present invention;

fig. 7 is a perspective view of a seal ring according to a second embodiment, a third embodiment and a fourth embodiment of the present invention;

FIG. 8 is an overall cross-sectional view of a second embodiment of the present invention;

FIG. 9 is an overall cross-sectional view of a third embodiment of the present invention;

FIG. 10 is an overall cross-sectional view of embodiment four of the present invention;

FIG. 11 is a schematic overall sectional view of a fifth embodiment of the invention;

FIG. 12 is a perspective view of a sealing gasket according to example five of the present invention;

FIG. 13 is a perspective view of a seal ring according to a fifth embodiment of the present invention;

FIG. 14 is a first usage state diagram of the second, third, fourth and fifth embodiments of the present invention;

fig. 15 is a usage state diagram of the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment of the present invention.

In the figure: 1. a drainer housing; 2. a water storage container; 3. a seal ring; 4. a self-locking sleeve; 5. a flap; 6. an external thread; 7. a helical sleeve; 8. an internal thread; 9. sealing sleeves; 10. a threaded boss; 11. an annular convex edge; 12. an annular baffle; 13. abutting against the convex strip; 14. reinforcing ribs; 15. a seal ring; 16. a sealing gasket; 17. a connecting portion; 18. a sewer pipe; 19. a holding plane; 20. an annular projection; 21. positioning the clamping groove; 22. a first annular sealing clamping strip; 23. and a second annular sealing clamping strip.

The specific implementation mode is as follows:

the invention will now be further described by way of specific examples, with reference to figures 1 to 15:

the first embodiment is as follows:

a fixing device of a drainer comprises a drainer shell 1 inserted on a water storage container 2 in a penetrating way, wherein a sealing ring 3 and a self-locking sleeve 4 are sequentially sleeved on the drainer shell 1 below the water storage container 2 from top to bottom, and the sealing ring 3 is respectively abutted against the water storage container 2 and the self-locking sleeve 4; one end of the self-locking sleeve 4 is of a cone structure with the outer diameter of the end part larger than that of the middle part, and the end is divided into a plurality of flaps 5 by gaps along the circumferential direction; the self-locking sleeve 4 is in threaded connection with a spiral sleeve 7 with internal threads 8 through external threads 6, the spiral sleeve 7 is screwed in towards the direction of the flaps 5 and is abutted against the outer wall surfaces of the flaps 5, the flaps 5 tightly hold the drainer shell 1 inwards along the radial direction, and the side wall of the drainer shell 1 is a smooth surface without a water overflow hole, namely in the embodiment, the drainer shell 1 is of a water overflow hole-free type and is suitable for a washbasin of a water overflow hole-free type;

in the invention, if the side wall of the drainer shell 1 is provided with the overflow holes, the drainer can also be applied to washbasins with overflow holes or without overflow holes; when the overflow hole type washbasin is applied to a washbasin with the overflow hole, the installation of the overflow hole type washbasin is the same as that of the existing drainer, and the overflow hole of the drainer shell 1 is positioned in the water storage container 2; when the overflow hole-free washbasin is used, the overflow hole of the lower water container shell 1 is positioned below the water storage container 2, and the inner wall surface of the sealing ring 3 completely covers the overflow hole, namely the overflow hole is blocked and sealed by the sealing ring 3.

The upper surface of the sealing ring 3 is tightly attached to the outer wall surface of the water storage container 2 through the self-locking sleeve 4, so that the water storage container 2 is fixedly connected with the lower water device shell 1; and the flap 5 tightly holds the drainer shell 1 by screwing in the screw thread of the spiral sleeve 7, so that the self-locking sleeve 4 is tightly connected with the drainer shell 1, and the connection is stable and reliable and is not easy to loosen.

Furthermore, in the present embodiment, in order to ensure that the upper surface of the sealing ring 3 is tightly attached to the outer wall surface of the water storage container 2, the flap 5 is the upper end of the self-locking sleeve 4, and when the flap 5 radially inwardly embraces the drainer housing 1, the upper end surface of the spiral sleeve 7 is in abutting connection with the lower surface of the sealing ring 3.

In order to further enhance the sealing performance between the water storage container 2 and the drainer shell 1, the inner hole of the self-locking sleeve 4 is a step hole, the inner diameter of the upper end of the self-locking sleeve is larger than that of the lower end of the self-locking sleeve and forms a positioning step, and the inner edge of the sealing ring 3 extends downwards to the inner hole of the upper end of the self-locking sleeve 4 to form a sealing sleeve 9. In the installation process, the screw thread of the spiral sleeve 7 is screwed in, so that the sealing sleeve 9 and the lower water device shell 1 are tightly held and fixed by the flaps 5 along the radial direction inwards, namely, the sealing connection between the sealing sleeve 9 and the lower water device shell 1 is realized, and meanwhile, the upper end surface of the spiral sleeve 7 can abut against the lower surface of the sealing ring 3, so that the sealing connection between the sealing ring 3 and the water storage container 2 is realized.

When the sealing ring 3 and the self-locking sleeve 4 are sleeved on the drainer shell 1, in order to ensure that the upper end face of the sealing ring 3 is in a state of abutting against the outer wall face of the water storage container 2, the lower end face of the sealing sleeve 9 abuts against the positioning step, and the height of the sealing sleeve 9 is more than or equal to the depth from the upper end face of the self-locking sleeve 4 to the positioning step. In this embodiment, the height of the sealing sleeve 9 is greater than the depth from the upper end surface of the self-locking sleeve 4 to the positioning step.

In order to improve the connection stability of the self-locking tower barrel and the spiral sleeve 7 and the self-locking stability of the petal 5 tightly holding the shell of the drainer, a thread bulge 10 which can be matched with the internal thread 8 of the spiral sleeve 7 is arranged on the outer wall surface of the petal 5.

Simultaneously, through increasing the active area between spiral sleeve 7 and the sealing ring 3, further promote the sealing connection between sealing ring 3 and the water storage container 2, the upper end tip of spiral sleeve 7 is provided with annular protruding edge 11, and the outer border of annular protruding edge 11 upwards extends and forms an annular baffle 12, sealing ring 3 sets up in annular baffle 12, and the lateral wall face of sealing ring 3 offsets with the medial surface of annular baffle 12. In the in-service use process, the screw thread of spiral sleeve 7 is screwed in for elastic deformation takes place for sealing ring 3 under the inconsistent state with store water container 2, and under the radial restriction of ring baffle 12, elastic deformation takes place for sealing ring 3 can't take place along the warp direction in ring baffle 12, consequently, elastic deformation can only take place for sealing ring 3 along the axial, and then make sealing ring 3 and store water container 2 closely laminate more, and its leakproofness is good, realizes exempting from glass to glue and the raw sticky tape is sealed.

Furthermore, when increasing the effective area between spiral sleeve 7 and the sealing ring 3, reduce the area of contact between spiral sleeve 7 and the sealing ring 3 to improve the pressure size that spiral sleeve 7 applyed to sealing ring 3, the upper surface of annular protruding edge 11 is provided with and leans on sand grip 13, leans on sand grip 13 to contradict and connects on the lower terminal surface of sealing ring 3. In this embodiment, the abutting convex strips 13 are annular structures, and more than two abutting convex strips are arranged at equal intervals along the radial direction of the spiral sleeve 7.

In addition, in order to improve the load strength of the screw sleeve 7 of the present invention, a plurality of reinforcing ribs 14 are circumferentially arranged between the lower surface of the annular flange 11 and the outer wall surface of the screw sleeve 7.

Example two:

the structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: the sealing ring 3 comprises a sealing ring 15 and a sealing washer 16 from top to bottom, the inner edge of the sealing washer 16 extends downwards to an inner hole at the upper end of the self-locking sleeve 4 to form a sealing sleeve 9, and the lower end face of the sealing washer 16 is connected with the upper end face of the spiral sleeve 7 in an abutting mode. In order to ensure the sealing performance between the drainer shell 1 and the water storage container 2 and the stable connection between the drainer shell 1 and the self-locking sleeve 4, the sealing ring 3 is designed into a sealing ring 15 and a sealing washer 16 with different structures and functions.

Furthermore, the upper end surface of the sealing ring 15 is a conical surface with a radius of small top and large bottom, and the conical surface of the sealing ring 15 is connected with the lower end surface of the water storage container 2 in an abutting mode.

And, the inner walls of the seal ring 15 and the seal sleeve 9 are provided with annular protrusions 20 for increasing the friction coefficient and the sealing property of the seal ring 15 and the seal sleeve 9 with the drainer housing 1.

In addition, the lower end of the self-locking sleeve 4 extends downwards to form a connecting part 17, and the connecting part 17 is fixed with the upper port of the sewer pipe 18 through threads. Of course, in an actual use state, as shown in fig. 13 and 14 of the drawings, the connecting portion 17 may be screwed to one end of the linear pipe joint or the angled pipe joint, and the other end of the linear pipe joint or the angled pipe joint may be connected to the upper port of the downcomer 18.

Compare among the prior art the upper end of downcomer 18 and the lower extreme of downcomer casing 1 is connected, and this embodiment is connected downcomer 18 and connecting portion 17 of auto-lock sleeve 4, can effectively shorten the length and the materials of hydrophone casing 1 down, reduces the processing cost, reduces the processing degree of difficulty.

Meanwhile, in order to facilitate the threaded connection operation of the spiral sleeve 7 and the self-locking sleeve 4, a plurality of holding planes 19 are arranged on the outer side wall of the connecting portion 17 along the circumferential direction.

Example three:

the structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: the sealing ring 3 comprises a sealing ring 15 and a sealing sleeve 9 from top to bottom, the sealing sleeve 9 is located in an upper end inner hole of the self-locking sleeve 4, and the lower end face of the sealing ring 15 is connected with the upper end face of the spiral sleeve 7 in an abutting mode. The structural principle is the same as that of the second embodiment.

Namely, the upper end surface of the sealing ring 15 is a conical surface with a small radius at the top and a large radius at the bottom, and the conical surface of the sealing ring 15 is connected with the lower end surface of the water storage container 2 in an abutting mode; the inner walls of the sealing ring 15 and the sealing sleeve 9 are provided with annular protrusions 20 for increasing the friction coefficient and the sealing performance of the sealing ring 15 and the sealing sleeve 9 with the lower water device shell 1. The lower end of the self-locking sleeve 4 extends downwards to form a connecting part 17, and the connecting part 17 is fixed with the upper end opening of the sewer pipe 18 through external threads; as in the embodiment, in an actual use state, as shown in fig. 13 and 14 of the drawings attached to the specification, the connecting portion 17 is screwed to one end of the linear pipe joint or the angled pipe joint, and the other end of the linear pipe joint or the angled pipe joint is connected to the upper port of the sewer pipe 18.

The outer side wall of the connecting part 17 is provided with a plurality of holding planes 19 along the circumferential direction.

Example four:

the structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: the hole of self-locking sleeve 4 is the through-hole, and screw sleeve 7 screws into and is inconsistent with the outer wall of lamella 5 towards lamella 5 direction, and then lamella 5 holds down hydrophone casing 1 along radial inside, and lamella 5 is direct to hold down fixedly with hydrophone casing 1 promptly.

Wherein, the sealing ring 3 is the sealing ring 15 in the second and third embodiments, the upper end surface of the sealing ring 15 is a conical surface with a small radius at the top and a big radius at the bottom, and the conical surface of the sealing ring 15 is connected with the lower end surface of the water storage container 2 in an abutting mode; an annular protrusion 20 is provided on the inner wall of the seal ring 15 for increasing the friction coefficient and sealing performance of the seal ring 15 and the seal sleeve 9 with the drainer housing 1.

And, the lower end of the self-locking sleeve 4 extends downwards to form a connecting part 17, and the connecting part 17 is fixed with the upper port of the downcomer 18 through external threads. As in the embodiment, as shown in fig. 13 and 14 in the drawings of the specification in an actual use state, the connecting portion 17 is screwed to one end of the linear pipe joint or the angled pipe joint, and the other end of the linear pipe joint or the angled pipe joint is connected to the upper port of the sewer pipe 18.

Example five:

the structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: the sealing ring 3 comprises a sealing ring 15 and a sealing washer 16 from top to bottom, the inner edge of the sealing washer 16 extends downwards to an inner hole at the upper end of the self-locking sleeve 4 to form a sealing sleeve 9, a positioning clamping groove 21 is formed in the upper end face of the sealing washer 16, and the lower end of the sealing ring 15 is clamped in the positioning clamping groove 21;

meanwhile, in order to improve the sealing performance between the sealing washer 16 and the sealing ring 15, a first dry strip annular sealing clamping strip is arranged on the positioning clamping groove 21 at equal intervals along the radial direction of the positioning clamping groove, and a second annular sealing clamping strip which is staggered with the first annular sealing strip is arranged on the lower end face of the sealing ring 15.

Compared with the second and third embodiments, the sealing performance between the sealing ring 15 and the sealing gasket 16 is better, that is, the overflow hole can be completely covered and better sealed by the sealing ring and the sealing gasket.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the invention are covered by the protection scope of the invention.

Claims

1. A fixing device of a drainer comprises a drainer shell (1) which is inserted on a water storage container (2) in a penetrating way, and is characterized in that: a sealing ring (3) and a self-locking sleeve (4) are sequentially sleeved on the drainer shell (1) positioned below the water storage container (2) from top to bottom, and the sealing ring (3) is respectively abutted against the water storage container (2) and the self-locking sleeve (4); one end of the self-locking sleeve (4) is of a cone structure with the outer diameter of the end part larger than that of the middle part, and the end is divided into a plurality of flaps (5) by gaps along the circumferential direction; the self-locking sleeve (4) is in threaded connection with a spiral sleeve (7) with internal threads (8) through external threads (6), the spiral sleeve (7) is screwed in towards the direction of the flaps (5) and is abutted against the outer wall surfaces of the flaps (5), then the flaps (5) radially and inwards clasp the drainer shell (1), and the side wall of the drainer shell (1) is a smooth surface without a water overflow hole;

or the side wall of the drainer shell (1) is provided with an overflow hole which is positioned in the water storage container (2);

or the side wall of the drainer shell (1) is provided with an overflow hole which is positioned below the water storage container (2), and the inner wall surface of the sealing ring (3) completely covers the overflow hole.

2. A downcomer mounting apparatus according to claim 1 wherein: the upper end of self-locking sleeve (4) is provided with the flaps (5), and when the flaps (5) hold the lower water device shell (1) inwards along the radial direction, the upper end surface of the spiral sleeve (7) is connected with the lower surface of the sealing ring (3) in an abutting mode.

3. A downcomer mounting apparatus according to claim 2 wherein: the inner hole of the self-locking sleeve (4) is a stepped hole, the inner diameter of the upper end of the self-locking sleeve is larger than that of the lower end of the self-locking sleeve, a positioning step is formed, and the inner edge of the sealing ring (3) extends downwards to the inner hole of the upper end of the self-locking sleeve (4) to form a sealing sleeve (9);

or the sealing ring (3) comprises a sealing ring (15) and a sealing gasket (16) from top to bottom, the inner edge of the sealing gasket (16) extends downwards to the inner hole at the upper end of the self-locking sleeve (4) to form a sealing sleeve (9), and the lower end face of the sealing gasket (16) is connected with the upper end face of the spiral sleeve (7) in an abutting mode;

or the sealing ring (3) comprises a sealing ring (15) and a sealing washer (16) from top to bottom, the inner edge of the sealing washer (16) extends downwards to the inner hole at the upper end of the self-locking sleeve (4) to form a sealing sleeve (9), the upper end surface of the sealing washer (16) is provided with a positioning clamping groove (21), and the lower end of the sealing ring (15) is clamped in the positioning clamping groove (21);

or the sealing ring (3) comprises a sealing ring (15) and a sealing sleeve (9) from top to bottom, the sealing sleeve (9) is positioned in an upper end inner hole of the self-locking sleeve (4), and the lower end face of the sealing ring (15) is connected with the upper end face of the spiral sleeve (7) in an abutting mode.

4. A downcomer mounting apparatus according to claim 3 wherein: the upper end surface of the sealing ring (15) is a conical surface with a radius being small at the top and large at the bottom, and the conical surface of the sealing ring (15) is connected with the lower end surface of the water storage container (2) in an abutting mode.

5. A downcomer mounting apparatus according to claim 3 wherein: the lower end face of the sealing sleeve (9) is abutted against the positioning step, and the height of the sealing sleeve (9) is larger than or equal to the depth from the upper end face of the self-locking sleeve (4) to the positioning step.

6. A downcomer mounting apparatus according to claim 1 wherein: the outer wall surface of the flap (5) is provided with a thread bulge (10) which can be matched with the internal thread (8) of the spiral sleeve (7).

7. A downcomer mounting apparatus according to claim 2 wherein: the upper end tip of spiral sleeve (7) is provided with annular protruding edge (11), and the outer border of annular protruding edge (11) upwards extends and forms an annular baffle (12), sealing ring (3) set up in annular baffle (12), and the lateral wall face of sealing ring (3) is inconsistent with the medial surface of annular baffle (12).

8. A downcomer mounting apparatus according to claim 7 wherein: the upper surface of annular protruding edge (11) is provided with and supports to lean on sand grip (13), supports to lean on sand grip (13) to contradict to connect on the lower terminal surface of sealing ring (3).

9. A downcomer mounting apparatus according to claim 2 wherein: the lower end of the self-locking sleeve (4) extends downwards to form a connecting part (17), and the connecting part (17) is fixed with the upper port of the sewer pipe (18) through external threads.

10. A downcomer mounting apparatus according to claim 9 wherein: the outer side wall of the connecting part (17) is provided with a plurality of holding planes (19) along the circumferential direction.