A fixing device for a drain

Abstract

The present invention belongs to the technical field of water drains, and particularly refers to a fixing device for water drains, including a water drain shell that is inserted through a water storage container, a sealing ring and a self-locking sleeve are mounted on the water drain shell, and the sealing ring is in conflict with the water storage container and the self-locking sleeve respectively; one end of the self-locking sleeve is a cone structure with an outer diameter of the end portion greater than the outer diameter of the middle portion, and the end is divided into a plurality of petals by a gap along the circumferential direction; the self-locking sleeve is threaded with a spiral sleeve, and the spiral sleeve is screwed in the direction of the petals and in conflict with the outer wall surface of the petals, so that the petals embrace the water drain shell radially inward. The present invention tightly fits the upper surface of the sealing ring with the outer wall surface of the water storage container through the self-locking sleeve, thereby achieving a seal between the water storage container and the water drain shell; and the petals are tightly embraced by the screw thread of the spiral sleeve, thereby achieving a tight connection between the self-locking sleeve and the water drain shell, and the connection is stable, reliable, and not easy to loosen.

Description

Technical field:

[0001] The invention belongs to the technical field of drains, and in particular relates to a fixing device for drains. Background technology:

[0002] A general water storage container (such as a kitchen sink, a wash basin in a bathroom, etc.) has a drain hole in the middle, and a drainer is sealed and installed in the drain hole and connected to a drain pipe. The sealing between the drainer and the drain hole is extremely important. If the sealing is not good, the sewage in the water storage container will easily leak out.

[0003] In the existing practical technology, the drain has the following problems:

[0004] First, the installation of the drain is generally through the drain's own external thread and the nut thread connection. Since the drain surface is processed with threads, in actual use, water flows along the external threads, and it is difficult to achieve a sealing effect. Only raw tape, glass glue, etc. can be used;

[0005] Secondly, since most of the actual drains are made of metal, there is a loss of CNC tool in thread processing, which makes the processing size different, which leads to the phenomenon of slipping threads in actual use, and the connection is not ideal and cannot seal water;

[0006] Third, since the drain needs to be processed with threads, the longer the thread processing length is, the greater the eccentricity of the thread processing is, that is, the thread length of the drain has limitations. The longer the length is, the more difficult it is to process and the more time-consuming it is. Therefore, the thread length of drains on the market is basically around 8cm. However, when the thickness of some basins exceeds 7cm, the required thread length is not enough, and ordinary drains are basically difficult to assemble and fix.

[0007] Fourthly, the washbasins currently available on the market can be divided into two categories: with overflow hole and without overflow hole. In order to adapt to different types of washbasins, correspondingly, drains are also divided into two categories: with overflow hole and without overflow hole. Therefore, manufacturers usually reserve drains of the same model with and without overflow hole types respectively, which is inconvenient to reserve, the reserve capacity is small and the required reserve space is large. Summary of the invention:

[0008] The purpose of the present invention is to provide a fixing device for a drain which is easy to install by hand, is universal with or without overflow holes, has stable and firm connection, has good water sealing effect, does not require thread processing on the drain, and the length of the drain can be arbitrarily designed.

[0009] The present invention is achieved in that:

[0010] A fixing device for a water drain comprises a water drain housing inserted through a water storage container, a sealing ring and a self-locking sleeve are sequentially mounted on the water drain housing below the water storage container from top to bottom, the sealing ring is in conflict with the water storage container and the self-locking sleeve respectively; one end of the self-locking sleeve is a cone structure with an outer diameter of the end portion being larger than the outer diameter of the middle portion, and the end is divided into a plurality of petals by a gap along the circumferential direction; the self-locking sleeve is screwed with a spiral sleeve having an internal thread through an external thread, the spiral sleeve is screwed in toward the petal direction and in conflict with the outer wall surface of the petal, and then the petal embraces the water drain housing radially inward, and the side wall of the water drain housing is a smooth surface without a water overflow hole;

[0011] Or a water overflow hole is provided on the side wall of the drain housing, and the water overflow hole is located in the water storage container;

[0012] Or an overflow hole is opened on the side wall of the drainer shell, the overflow hole is located below the water storage container, and the inner wall surface of the sealing ring completely covers the overflow hole.

[0013] In the above-mentioned fixing device for a drain, the petal is the upper end of the self-locking sleeve, and when the petal embraces the drain housing radially inward, the upper end surface of the spiral sleeve is in contact with the lower surface of the sealing ring.

[0014] In the above-mentioned fixing device for the drain, the inner hole of the self-locking sleeve is a stepped hole, the inner diameter of the upper end is larger than the inner diameter of the lower end and forms a positioning step, and the inner edge of the sealing ring extends downward to the inner hole of the upper end of the self-locking sleeve to form a sealing sleeve;

[0015] Or the sealing ring includes a sealing ring and a sealing gasket stacked from top to bottom, the inner edge of the sealing gasket extends downward to the inner hole at the upper end of the self-locking sleeve to form a sealing sleeve, and the lower end surface of the sealing gasket is in contact with the upper end surface of the spiral sleeve;

[0016] Or the sealing ring includes a sealing ring and a sealing gasket from top to bottom, the inner edge of the sealing gasket extends downward to the inner hole of the upper end of the self-locking sleeve to form a sealing sleeve, the upper end surface of the sealing gasket is provided with a positioning groove, and the lower end of the sealing ring is clamped in the positioning groove;

[0017] Or the sealing ring includes a sealing ring and a sealing sleeve stacked from top to bottom, the sealing sleeve is located in the upper end inner hole of the self-locking sleeve, and the lower end surface of the sealing ring is in contact with the upper end surface of the spiral sleeve.

[0018] In the above-mentioned fixing device for the drain, the upper end surface of the sealing ring is a conical surface with a smaller radius at the top and a larger radius at the bottom, and the conical surface of the sealing ring is in contact with the lower end surface of the water storage container.

[0019] In the above-mentioned fixing device for the drain, the lower end surface 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 surface of the self-locking sleeve to the positioning step.

[0020] In the above-mentioned fixing device for a drain, a threaded protrusion which can cooperate with the internal thread of the spiral sleeve is arranged on the outer wall surface of the petal.

[0021] In the above-mentioned fixing device of the drain, the upper end of the spiral sleeve is provided with an annular protrusion, the outer edge of the annular protrusion extends upward to form an annular baffle, the sealing ring is arranged in the annular baffle, and the side wall surface of the sealing ring is in conflict with the inner side surface of the annular baffle.

[0022] In the above-mentioned fixing device for the drain, the upper surface of the annular convex edge is provided with abutting convex strips, and the abutting convex strips are abutted and connected to the lower end surface of the sealing ring.

[0023] In the above-mentioned fixing device for a drain, the abutting convex strip is an annular structure, and more than two of them are arranged at equal intervals along the radial direction of the spiral sleeve.

[0024] In the above-mentioned fixing device for a water drain, 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.

[0025] In the above-mentioned fixing device for a water downcomer, the lower end of the self-locking sleeve extends downward to form a connecting portion, and the connecting portion is threadedly fixed to the upper end of the downcomer pipe through an external thread.

[0026] In the above-mentioned fixing device for a drain, a plurality of gripping planes are arranged on the outer side wall of the connecting portion along its circumference.

[0027] The outstanding advantages of the present invention compared with the prior art are:

[0028] 1. The present invention uses a self-locking sleeve to tightly fit the upper surface of the sealing ring with the outer wall of the water storage container to achieve a fixed connection between the water storage container and the drain housing; and the spiral sleeve is screwed in so that the petals tightly embrace the drain housing to achieve a fastened connection between the self-locking sleeve and the drain housing. It does not require the use of glass glue for sealing, can be installed by hand, and is simple and convenient to operate, and the connection is stable, reliable, and not loose.

[0029] 2. The present invention enables the drain housing with overflow hole to be respectively suitable for water storage containers with overflow hole and water storage containers without overflow hole, so that in actual production and processing, the manufacturer only needs to produce and reserve drain housing with overflow hole.

[0030] 3. The connection part of the self-locking sleeve of the present invention is fixed with the upper end thread of the downpipe through an external thread. Compared with the prior art in which the downpipe is connected to the downpipe housing, there is no need to process threads on the downpipe housing, so that the length of the downpipe housing is not limited by the length of the thread processing. The length of the downpipe housing can be arbitrarily designed according to actual needs, effectively shortening the length and materials of the downpipe housing, reducing processing costs, reducing processing difficulty, and improving the versatility of the downpipe.

[0031] 4. Compared with the prior art, the end shrinkage of the drain shell of the present invention has strong burst resistance. This is because before the drain shell of the prior art is processed with external threads, the outer diameter of 36.7mm needs to be shrunk to 32mm at its end by thermal expansion and contraction, and according to the processing height of the external thread, the shrinkage length often reaches 8-10mm. Due to material factors, the longer the shrinkage length, the easier it is to burst. In contrast, the drain shell of the present invention does not need to be processed with external threads, and its shrinkage length can be controlled within a shorter range, so it is not easy to burst. Description of the drawings:

[0032] Figure 1 is an overall cross-sectional schematic diagram of embodiment 1 of the present invention;

[0033] Figure 2 is a three-dimensional diagram of a self-locking sleeve according to the first embodiment of the present invention;

[0034] Figure 3 is a three-dimensional diagram of a spiral sleeve according to the first embodiment of the present invention;

[0035] Figure 4 It is a stereoscopic diagram of the self-locking sleeves of Embodiment 2, Embodiment 3, Embodiment 4 and Embodiment 5 of the present invention;

[0036] Figure 5 It is a three-dimensional diagram of the spiral sleeve of the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment of the present invention;

[0037] Figure 6 is a stereoscopic diagram of the sealing gaskets of the second embodiment and the third embodiment of the present invention;

[0038] Figure 7 It is a three-dimensional diagram of the sealing ring of the second embodiment, the third embodiment and the fourth embodiment of the present invention;

[0039] Figure 8 is an overall cross-sectional schematic diagram of embodiment 2 of the present invention;

[0040] Fig. 9 is an overall cross-sectional schematic diagram of embodiment 3 of the present invention;

[0041] Fig.10 is an overall cross-sectional schematic diagram of a fourth embodiment of the present invention;

[0042] Fig.11 is a schematic diagram of an overall cross-sectional view of a fifth embodiment of the present invention;

[0043] Fig.12 is a three-dimensional diagram of a sealing gasket according to a fifth embodiment of the present invention;

[0044] Fig.13 is a three-dimensional diagram of a sealing ring according to a fifth embodiment of the present invention;

[0045] Fig.14 This is the usage state of the second, third, fourth and fifth embodiments of the present invention. Figure 1 ;

[0046] Fig.15 This is the usage state of the second, third, fourth and fifth embodiments of the present invention. Figure 2 .

[0047] In the figure: 1. drain housing; 2. water storage container; 3. sealing ring; 4. self-locking sleeve; 5. petal; 6. external thread; 7. spiral sleeve; 8. internal thread; 9. sealing sleeve; 10. threaded protrusion; 11. annular convex edge; 12. annular baffle; 13. abutting convex strip; 14. reinforcing rib; 15. sealing ring; 16. sealing gasket; 17. connecting part; 18. drain pipe; 19. holding plane; 20. annular protrusion; 21. positioning slot; 22. annular sealing strip one; 23. annular sealing strip two. Specific implementation method:

[0048] The present invention is further described below with reference to specific embodiments. Figure 1 —15:

[0049] Embodiment 1:

[0050] A fixing device for a drain, comprising a drain housing 1 inserted through a water storage container 2, a sealing ring 3 and a self-locking sleeve 4 being sequentially mounted on the drain housing 1 below the water storage container 2 from top to bottom, the sealing ring 3 respectively abutting against the water storage container 2 and the self-locking sleeve 4; one end of the self-locking sleeve 4 is a cone structure with an outer diameter of the end portion being larger than an outer diameter of the middle portion, and the end is divided into a plurality of petals 5 by a gap along the circumferential direction; the self-locking sleeve 4 is screwed with a spiral sleeve 7 having an inner thread 8 through an outer thread 6, the spiral sleeve 7 is screwed in toward the petal 5 and abutting against the outer wall surface of the petal 5, and then the petal 5 radially inwardly embraces the drain housing 1, and the side wall of the drain housing 1 is a smooth surface without an overflow hole, that is, in the present embodiment, the drain housing 1 is of a type without an overflow hole, and is suitable for a washbasin of a type without an overflow hole;

[0051] In the present invention, if an overflow hole is provided on the side wall of the drain housing 1, it can also be applied to washbasins with overflow holes and those without overflow holes. When applied to a washbasin with overflow holes, the overflow hole of the drain housing 1 is located in the water storage container 2, the same as the existing drain installation. When applied to a washbasin without overflow holes, the overflow hole of the drain housing 1 should be located below the water storage container 2, and the inner wall surface of the sealing ring 3 completely covers the overflow hole, that is, the overflow hole is blocked and sealed by the sealing ring 3.

[0052] The present invention uses the self-locking sleeve 4 to tightly fit the upper surface of the sealing ring 3 with the outer wall of the water storage container 2, thereby realizing a fixed connection between the water storage container 2 and the drain housing 1; and by screwing in the thread of the spiral sleeve 7, the petals 5 are tightly embraced by the drain housing 1, thereby realizing a tight connection between the self-locking sleeve 4 and the drain housing 1, and the connection is stable, reliable, and not easy to loosen.

[0053] Furthermore, in this embodiment, in order to ensure that the upper surface of the sealing ring 3 is tightly fitted with the outer wall of the water storage container 2, the petal 5 is the upper end of the self-locking sleeve 4. When the petal 5 radially inwardly embraces the drain housing 1, the upper end surface of the spiral sleeve 7 is in contact with the lower surface of the sealing ring 3.

[0054] In order to further enhance the sealing between the water storage container 2 and the drain housing 1, the inner hole of the self-locking sleeve 4 is a stepped hole, the inner diameter of the upper end is larger than the inner diameter of the lower end and forms a positioning step, and the inner edge of the sealing ring 3 extends downward to the inner hole of the upper end of the self-locking sleeve 4 to form a sealing sleeve 9. During the installation process, the thread of the spiral sleeve 7 is screwed in, so that the petals 5 hold the sealing sleeve 9 and the drain housing 1 inwardly in the radial direction, that is, the sealing connection between the sealing sleeve 9 and the drain housing 1 is realized, and at the same time, the upper end surface of the spiral sleeve 7 can be against the lower surface of the sealing ring 3, so as to realize the sealing connection between the sealing ring 3 and the water storage container 2.

[0055] When the seal ring 3 and the self-locking sleeve 4 are mounted on the drain housing 1, in order to ensure that the upper end surface of the seal ring 3 is in a state of abutment with the outer wall surface of the water storage container 2, the lower end surface of the seal sleeve 9 abuts against the positioning step, and the height of the seal sleeve 9 is greater than or equal to the depth from the upper end surface of the self-locking sleeve 4 to the positioning step. In this embodiment, the height of the seal sleeve 9 is greater than the depth from the upper end surface of the self-locking sleeve 4 to the positioning step.

[0056] In order to improve the connection stability between the self-locking tower and the spiral sleeve 7 and the self-locking stability of the petal 5 holding the water discharger housing, a threaded protrusion 10 that can cooperate with the internal thread 8 of the spiral sleeve 7 is provided on the outer wall surface of the petal 5.

[0057] At the same time, by increasing the effective area between the spiral sleeve 7 and the sealing ring 3, the sealing connection between the sealing ring 3 and the water storage container 2 is further improved. The upper end of the spiral sleeve 7 is provided with an annular convex edge 11, and the outer edge of the annular convex edge 11 extends upward to form an annular baffle 12. The sealing ring 3 is arranged in the annular baffle 12, and the side wall surface of the sealing ring 3 conflicts with the inner side surface of the annular baffle 12. In actual use, the thread of the spiral sleeve 7 is screwed in, so that the sealing ring 3 is elastically deformed in the state of conflicting with the water storage container 2, and under the radial restriction of the annular baffle 12, the sealing ring 3 cannot be elastically deformed in the annular baffle 12 along the longitudinal direction. Therefore, the sealing ring 3 can only be elastically deformed in the axial direction, thereby making the sealing ring 3 and the water storage container 2 more closely fit, and its sealing performance is good, and the sealing without glass glue and raw tape is realized.

[0058] Furthermore, while increasing the action area between the spiral sleeve 7 and the sealing ring 3, the contact area between the spiral sleeve 7 and the sealing ring 3 is reduced, thereby increasing the pressure applied by the spiral sleeve 7 to the sealing ring 3. The upper surface of the annular convex edge 11 is provided with abutting convex strips 13, and the abutting convex strips 13 are abutted and connected to the lower end surface of the sealing ring 3. In this embodiment, the abutting convex strips 13 are annular structures, and more than two abutting convex strips 13 are provided at equal intervals along the radial direction of the spiral sleeve 7.

[0059] In addition, in order to improve the load strength of the spiral sleeve 7 of the present invention, a plurality of reinforcing ribs 14 are circumferentially arranged between the lower surface of the annular convex edge 11 and the outer wall surface of the spiral sleeve 7 .

[0060] Embodiment 2:

[0061] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that: the sealing ring 3 includes a sealing ring 15 and a sealing gasket 16 from top to bottom, the inner edge of the sealing gasket 16 extends downward to the inner hole of the upper end of the self-locking sleeve 4 to form a sealing sleeve 9, and the lower end surface of the sealing gasket 16 is in contact with the upper end surface of the spiral sleeve 7. That is, in order to ensure the sealing between the drain housing 1 and the water storage container 2 and the stable connection between the drain housing 1 and the self-locking sleeve 4, the sealing ring 3 is designed as a sealing ring 15 and a sealing gasket 16 with different structures and functions.

[0062] Furthermore, the upper end surface of the sealing ring 15 is a conical surface with a radius that is smaller at the top and larger at the bottom, and the conical surface of the sealing ring 15 is in contact with the lower end surface of the water storage container 2 .

[0063] In addition, an annular protrusion 20 is provided on the inner wall of the sealing ring 15 and the sealing sleeve 9 to increase the friction coefficient and sealing performance between the sealing ring 15 and the sealing sleeve 9 and the drain housing 1 .

[0064] In addition, the lower end of the self-locking sleeve 4 extends downward to form a connecting portion 17, and the connecting portion 17 is threadedly fixed to the upper end of the downpipe 18 through an external thread. Fig.13 and Fig.14 As shown, the connecting portion 17 is threadedly connected to one end of a straight pipe joint or an angled pipe joint, and the other end of the straight pipe joint or the angled pipe joint is connected to the upper end of the sewer pipe 18 .

[0065] Compared with the prior art in which the upper end of the downpipe 18 is connected to the lower end of the downpipe housing 1, this embodiment connects the downpipe 18 to the connecting portion 17 of the self-locking sleeve 4, which can effectively shorten the length and material of the downpipe housing 1, reduce processing costs, and reduce processing difficulty.

[0066] At the same time, in order to facilitate the threaded connection operation between the spiral sleeve 7 and the self-locking sleeve 4, a plurality of gripping planes 19 are provided on the outer side wall of the connecting portion 17 along its circumference.

[0067] Embodiment three:

[0068] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the sealing ring 3 includes a sealing ring 15 and a sealing sleeve 9 from top to bottom, the sealing sleeve 9 is located in the upper end inner hole of the self-locking sleeve 4, and the lower end surface of the sealing ring 15 is in contact with the upper end surface of the spiral sleeve 7. Its structural principle is consistent with the above-mentioned embodiment 2.

[0069] That is, the upper end surface of the sealing ring 15 is a conical surface with a smaller radius at the top and a larger radius at the bottom, and the conical surface of the sealing ring 15 is in contact with the lower end surface of the water storage container 2; an annular protrusion 20 is provided on the inner wall of the sealing ring 15 and the sealing sleeve 9 to increase the friction coefficient and sealing performance of the sealing ring 15 and the sealing sleeve 9 and the water discharger housing 1. The lower end of the self-locking sleeve 4 extends downward to form a connecting portion 17, and the connecting portion 17 is threadedly fixed to the upper end of the water discharge pipe 18 through an external thread; it is the same as the second embodiment, and is shown in the figure of the specification in actual use. Fig.13 and Fig.14 As shown, the connecting portion 17 is threadedly connected to one end of a straight pipe joint or an angled pipe joint, and the other end of the straight pipe joint or the angled pipe joint is connected to the upper end of the sewer pipe 18 .

[0070] A plurality of gripping planes 19 are provided on the outer wall of the connecting portion 17 along its circumference.

[0071] Embodiment 4:

[0072] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the inner hole of the self-locking sleeve 4 is a through hole, the spiral sleeve 7 is screwed in the direction of the petal 5 and contacts the outer wall surface of the petal 5, and then the petal 5 radially inwardly embraces the drain housing 1, that is, the petal 5 is directly embraced and fixed to the drain housing 1.

[0073] Among them, the sealing ring 3 is the sealing ring 15 in the above-mentioned embodiment 2 and embodiment 3, the upper end face of the sealing ring 15 is a conical surface with a radius smaller at the top and larger at the bottom, and the conical surface of the sealing ring 15 is in contact with the lower end face of the water storage container 2; an annular protrusion 20 is provided on the inner wall of the sealing ring 15, which is used to increase the friction coefficient and sealing performance between the sealing ring 15 and the sealing sleeve 9 and the drain housing 1.

[0074] Furthermore, the lower end of the self-locking sleeve 4 extends downward to form a connecting portion 17, and the connecting portion 17 is threadedly fixed to the upper end of the downpipe 18 through an external thread. Fig.13 and Fig.14 As shown, the connecting portion 17 is threadedly connected to one end of a straight pipe joint or an angled pipe joint, and the other end of the straight pipe joint or the angled pipe joint is connected to the upper end of the sewer pipe 18 .

[0075] Embodiment five:

[0076] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that: the sealing ring 3 includes a sealing ring 15 and a sealing gasket 16 from top to bottom, the inner edge of the sealing gasket 16 extends downward to the inner hole of the upper end of the self-locking sleeve 4 to form a sealing sleeve 9, and the upper end surface of the sealing gasket 16 is provided with a positioning groove 21, and the lower end of the sealing ring 15 is clamped in the positioning groove 21;

[0077] At the same time, in order to improve the sealing between the sealing gasket 16 and the sealing ring 15, a dry annular sealing strip 1 is arranged at equal intervals along the radial direction on the positioning groove 21, and an annular sealing strip 2 is arranged on the lower end surface of the sealing ring 15 and is offset from the annular sealing strip 1.

[0078] Furthermore, the lower end of the self-locking sleeve 4 extends downward to form a connecting portion 17, and the connecting portion 17 is threadedly fixed to the upper end of the downpipe 18 through an external thread. Fig.13 and Fig.14 As shown, the connecting portion 17 is threadedly connected to one end of a straight pipe joint or an angled pipe joint, and the other end of the straight pipe joint or the angled pipe joint is connected to the upper end of the sewer pipe 18 .

[0079] Compared with the above-mentioned second and third embodiments, the sealing performance between the sealing ring 15 and the sealing gasket 16 of this embodiment is better, that is, the overflow hole can be completely covered and better sealed by means of the sealing ring and the sealing gasket.

[0080] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing device for a drain, comprising a drain housing (1) inserted through a water storage container (2), characterized in that: A sealing ring (3) and a self-locking sleeve (4) are sequentially mounted on a water discharger housing (1) located below the water storage container (2) from top to bottom, and the sealing ring (3) contacts the water storage container (2) and the self-locking sleeve (4) respectively; one end of the self-locking sleeve (4) is a cone structure with an outer diameter of the end portion being larger than an outer diameter of the middle portion, and the end is divided into a plurality of petals (5) by a gap along the circumferential direction; the self-locking sleeve (4) is screwed with a spiral sleeve (7) having an inner thread (8) through an outer thread (6), and the spiral sleeve (7) is screwed in toward the petal (5) and contacts the outer wall surface of the petal (5), so that the petal (5) holds the water discharger housing (1) inwardly in the radial direction, and the side wall of the water discharger housing (1) is a smooth surface without a water overflow hole; Or a water overflow hole is provided on the side wall of the drain housing (1), and the water overflow hole is located in the water storage container (2); Or a water overflow hole is provided on the side wall of the drain housing (1), the water overflow hole is located below the water storage container (2), and the inner wall surface of the sealing ring (3) completely covers the water overflow hole; The petal (5) is the upper end of the self-locking sleeve (4), and when the petal (5) embraces the water collector housing (1) radially inward, the upper end surface of the spiral sleeve (7) contacts and connects with the lower surface of the sealing ring (3); The outer wall surface of the petal (5) is provided with a thread protrusion (10) which can match with the internal thread (8) of the spiral sleeve (7).

2. A fixing device for a drain according to claim 1, characterized in that: The inner hole of the self-locking sleeve (4) is a stepped hole, the inner diameter of the upper end of which is larger than the inner diameter of the lower end and forms a positioning step, and the inner edge of the sealing ring (3) extends downward 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) includes a sealing ring (15) and a sealing gasket (16) from top to bottom, the inner edge of the sealing gasket (16) extends downward to the inner hole at the upper end of the self-locking sleeve (4) to form a sealing sleeve (9), and the lower end surface of the sealing gasket (16) is in contact with the upper end surface of the spiral sleeve (7); 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 downward 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 gasket (16) is provided with a positioning groove (21), and the lower end of the sealing ring (15) is clamped in the positioning 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 located in the upper end inner hole of the self-locking sleeve (4), and the lower end surface of the sealing ring (15) is in contact with the upper end surface of the spiral sleeve (7).

3. A fixing device for a drain according to claim 2, characterized in that: The upper end surface of the sealing ring (15) is a conical surface with a smaller radius at the top and a larger radius at the bottom. The conical surface of the sealing ring (15) is in contact with the lower end surface of the water storage container (2).

4. A fixing device for a drain according to claim 2, characterized in that: The lower end surface of the sealing sleeve (9) abuts against the positioning step, and the height of the sealing sleeve (9) is greater than or equal to the depth from the upper end surface of the self-locking sleeve (4) to the positioning step.

5. The fixing device for a drain according to claim 1, characterized in that: The upper end of the spiral sleeve (7) is provided with an annular convex edge (11), the outer edge of the annular convex edge (11) extends upward to form an annular baffle (12), the sealing ring (3) is arranged in the annular baffle (12), and the side wall surface of the sealing ring (3) is in contact with the inner side surface of the annular baffle (12).

6. A fixing device for a drain according to claim 5, characterized in that: The upper surface of the annular convex edge (11) is provided with abutting convex strips (13), and the abutting convex strips (13) are abutted and connected to the lower end surface of the sealing ring (3).

7. The fixing device for a drain according to claim 1, characterized in that: The lower end of the self-locking sleeve (4) extends downward to form a connecting portion (17), and the connecting portion (17) is threadedly fixed to the upper end of the downcomer pipe (18) via an external thread.

8. A fixing device for a drain according to claim 7, characterized in that: A plurality of gripping planes (19) are arranged on the outer side wall of the connecting portion (17) along its circumference.

Images