Floor drain core

Abstract

The present application discloses a floor drain core, which relates to the field of floor drains, and includes a floor drain core body, the floor drain core body having a water inlet and a water outlet, the water outlet being fixed with an elastic sealing ring portion, the elastic sealing ring portion surrounding the water outlet, the floor drain core body being floatingly hinged with a sealing plate, the floor drain core body being also hinged with a power plate, and the floor drain core body being further provided with a driving portion, the driving portion being used to drive the power plate to flip so that the sealing plate is pressed against the elastic sealing ring portion to close the water outlet. The sealing plate adopts a floating hinged connection method, so that the sealing plate no longer forms an articulated force arm, reduces the situation where the elastic sealing ring portion is unevenly stressed and causes local deformation, improves the service life, and makes the sealing effect more stable.

Description

Technical Field

[0001] The present application relates to the field of floor drains, and more particularly, to a floor drain core. Background Art

[0002] The floor drain is an important interface between the system and the indoor floor, and is an important component of the drainage system in a residence.

[0003] For example, the Chinese utility model patent with patent announcement number CN216766160U discloses an anti-backflow direct discharge floor drain core, which includes a floor drain core body with straight ends, the floor drain core body includes a water inlet and a water outlet, a sealing plate is hinged on one side of the water outlet, and a power-assisting plate is also hinged on one side of the water outlet, one end of the power-assisting plate is against the bottom of the sealing plate, and a power-assisting part is provided between the floor drain core body and the power-assisting plate to drive the power-assisting plate against the bottom of the sealing plate for resetting the sealing plate, and a sealing gasket is installed between the water outlet and the sealing plate to enhance the sealing.

[0004] In the above scheme, the sealing plate and the assisting plate are hinged at the water outlet. When the assisting part drives the assisting plate against the bottom of the sealing plate to close the water outlet, based on the characteristics of the hinged connection, the sealing plate flips along its own hinge axis around the hinge axis. When the assisting plate is pressed against the bottom of the sealing plate, based on the influence of the length of the force arm, the extrusion force formed closer to the hinge axis is greater. When the sealing gasket is deformed after long-term use, it will affect the fit of the sealing plate and thus affect the sealing stability, which needs to be improved. Summary of the invention

[0005] In order to improve the situation where the sealing gasket and the sealing plate are subjected to uneven force, resulting in deformation and thus affecting the sealing stability, the present application provides a floor drain core.

[0006] The present application provides a floor drain core, which adopts the following technical solution:

[0007] A floor drain core comprises a floor drain core body, the floor drain core body has a water inlet and a water outlet, the water outlet is fixed with an elastic sealing ring portion, the elastic sealing ring portion surrounds the water outlet, the floor drain core body is floatingly hinged with a sealing plate, the floor drain core body is also hinged with a power-assisting plate, and the floor drain core body is also provided with a driving portion, the driving portion is used to drive the power-assisting plate to flip so that the sealing plate presses against the elastic sealing ring portion to close the water outlet.

[0008] Through the above technical solution, the sealing plate adopts a floating hinged method. When the power-assisting plate presses against the sealing plate to close the water outlet, the floating hinged connection method makes the sealing plate no longer form a hinged force arm, reducing the local deformation of the elastic sealing ring due to uneven force, thereby improving the service life and making the sealing effect more stable.

[0009] Optionally, the sealing plate is installed on the assisting plate, and the sealing plate is connected to the floor drain core through the assisting plate; the assisting plate is provided with a hinge column, and the sealing plate is provided with a hinge groove for the hinge column to be embedded, the hinge groove is a long groove, and the length direction of the hinge groove is perpendicular to the end face of the elastic sealing ring part of the sealing plate, and the hinge column can slide along the length direction of the hinge groove to realize floating hinge.

[0010] Through the above technical solution, floating articulation is achieved through the cooperation of the articulation column and the articulation groove, making the implementation of floating articulation more convenient.

[0011] Optionally, the sealing plate is made of plastic, and an opening is provided at one end of the hinge slot along the length direction. The opening is gradually tapered toward the hinge slot, and the minimum width of the opening is slightly smaller than the diameter of the hinge column.

[0012] Through the above technical solution, an opening is provided, and the hinged column is installed by means of snap-in installation, so that the installation operation of the sealing plate and the power-assisting plate is more convenient.

[0013] Optionally, there are two hinged columns, which are distributed on both sides of the power-assisting plate and are coaxially arranged, and the hinged grooves are correspondingly arranged.

[0014] Through the above technical solution, the two hinged columns and the hinged grooves make the floating hinge cooperation more stable.

[0015] Optionally, a sealing ring groove is provided on the outer peripheral wall of the elastic sealing ring portion, and the sealing ring groove surrounds the water outlet.

[0016] Through the above technical solution, the sealing ring groove can enhance the elastic deformation degree of the elastic sealing ring portion, so that the sealing plate and the elastic sealing ring portion have better fit.

[0017] Optionally, an end surface of the elastic sealing ring portion for the sealing plate to fit is provided with an end surface ring groove, and the end surface ring groove surrounds the water outlet.

[0018] Through the above technical solution, an end face ring groove is provided. When the sealing plate and the elastic sealing ring part are pressed against each other, the end face ring groove strengthens the deformation of the elastic sealing ring part at the fitting point, so that the sealing plate and the elastic sealing ring part have better fitting properties.

[0019] Optionally, the end surface of the assisting plate facing the sealing plate has a protrusion, and the protrusion is used to abut against the area of ​​the sealing plate corresponding to the water outlet.

[0020] Through the above technical solution, a single point of abutment is formed by the protrusion, so that the force points of the power assisting plate and the sealing plate are more stable, and the abutting force distribution of the sealing plate and the elastic sealing ring is more even, making the sealing plate and the elastic sealing ring more durable and stable to use.

[0021] Optionally, the sealing plate is provided with an annular convex strip on the end surface thereof for fitting with the elastic sealing ring portion, the annular convex strip is located in the water outlet area, and the annular convex strip and the inner wall of the elastic sealing ring portion form a guide channel.

[0022] Through the above technical solution, the liquid remaining on the sealing plate can be guided through the guide channel, so that this part of the liquid is fully utilized to enhance the liquid to form a water film on the contact surface between the sealing plate and the elastic sealing ring to enhance the sealing effect.

[0023] Optionally, a capillary strip is provided on the outer wall of the elastic sealing ring portion, and the capillary strip surrounds the elastic sealing ring portion, and the capillary strip is used to abut against the outer edge of the elastic sealing ring portion where the sealing plate is attached.

[0024] Through the above technical solution, the capillary strips form a water storage effect, making the water film seal more durable and stable.

[0025] Optionally, the floor drain core is provided with a limiting portion, which is used to limit the maximum angle of the sealing plate and the assisting plate to flip open, and the limiting portion is provided with an elastic water storage portion, which is connected to the capillary strip to supply water to the capillary strip; when the sealing plate is opened, the assisting plate and the limiting portion squeeze the elastic water storage portion; the elastic water storage portion has a water guide strip, which is fixed to the sealing plate, and is used to guide the liquid flowing through the sealing plate to replenish the elastic water storage portion.

[0026] Through the above technical solution, the elastic water storage part supplies water to the capillary strip, so that the capillary strip can replenish water to the contact surface between the sealing plate and the elastic sealing ring part more permanently, making the water film sealing effect more durable. The elastic water storage part is squeezed by opening the sealing plate, and the water guide strip guides the elastic water storage part to absorb water when the sealing plate is closed. Each time the sealing plate is opened, the elastic water storage part is squeezed to drain water, which reduces bacterial growth and makes the water replenishment operation of the elastic water storage part more convenient, making the overall seal more durable.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] (1) The sealing plate adopts a floating hinge connection method, so that the sealing plate no longer forms a hinge arm, reducing the situation where the elastic sealing ring is subjected to uneven force and causing local deformation, thereby increasing the service life and making the sealing effect more stable;

[0029] (2) By providing a sealing ring groove and an end face ring groove, the elastic deformation degree of the elastic sealing ring portion is enhanced, so that the sealing plate and the elastic sealing ring portion have better fit;

[0030] (3) By providing the capillary strip, the elastic water storage part and the water guide strip, bacterial growth is reduced, and the water replenishment operation of the elastic water storage part is made more convenient, making the overall seal more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of the first embodiment;

[0032] Figure 2 is a cross-sectional schematic diagram of embodiment 1;

[0033] Figure 3 It is an explosion diagram of embodiment 1;

[0034] Figure 4 This is a schematic diagram of another state of the end face ring groove of the first embodiment;

[0035] Figure 5 This is a structural schematic diagram of one embodiment of the second embodiment;

[0036] Figure 6 This is another structural diagram of the second embodiment.

[0037] Figure numerals: 1. floor drain core; 11. floor drain body; 111. installation groove; 112. positioning hole; 12. fixing cover; 121. positioning rod; 122. arc groove; 123. limiting part; 2. water inlet; 3. water outlet; 4. elastic sealing ring part; 41. sealing ring groove; 42. end face ring groove; 5. reinforcement groove; 6. sealing plate; 61. annular convex strip; 7. power assist plate; 71. protrusion; 8. driving part; 81. magnet one; 82. magnet two; 9. hinged column; 10. hinged groove; 13. opening; 14. diversion channel; 15. capillary strip; 16. elastic water storage part; 17. water diversion strip. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings.

[0039] The embodiment of the present application discloses a floor drain core.

[0040] Embodiment 1:

[0041] A floor drain core, see Figure 1 and Figure 2, including a floor drain core 1 with two axial ends straight through, the floor drain core 1 having a water inlet 2 and a water outlet 3, the water outlet 3 being located at the lower end, the water outlet 3 being fixed with an elastic sealing ring 4, the elastic sealing ring 4 being made of an elastic material such as PET, TPE or TPR. The elastic sealing ring 4 surrounds the water outlet 3. During actual processing, the elastic sealing ring 4 is fixed to the floor drain core 1 through secondary injection molding. In order to achieve processing fixing strength, a reinforcement groove 5 is provided on the end face of the water outlet 3. During injection molding, rubber is filled into the reinforcement groove 5 to increase the bonding area. The end face of the elastic sealing ring 4 away from the water inlet extends obliquely downward relative to the vertical plane of the axis of the floor drain core 1.

[0042] See also Figure 2 and Figure 3 The floor drain core 1 is provided with a sealing plate 6, a power-assisting plate 7 and a driving part 8. The power-assisting plate 7 is made of plastic material, and the power-assisting plate 7 is hinged to the floor drain core 1. In order to facilitate the installation of the power-assisting plate 7, the floor drain core 1 includes a floor drain body 11 and a fixed cover 12, wherein the water inlet 2 and the water outlet 3 are both located in the floor drain body 11, and the floor drain body 11 is provided with a mounting groove 111, and the mounting groove 111 is located on the higher side of the floor drain body 11 corresponding to the elastic sealing ring part 4, and the hinge shaft of the power-assisting plate 7 is inserted into the mounting groove 111. The mounting groove 111 is also provided with a positioning hole 112, and the fixing cover 12 is fixed with a positioning rod 121, and the positioning rod 121 is embedded in the positioning hole 112 to achieve positioning. The fixing cover 12 is also provided with an arc groove 122. When the positioning rod 121 is embedded in the positioning hole 112, the arc groove 122 and the mounting groove 111 are spliced ​​to form a hinge hole to realize the rotation of the hinge shaft around its own axis, and the axis of the hinge shaft is perpendicular to the axis of the floor drain core 1. To strengthen the fixation, the positioning rod 121 can be further fixed by gluing after being inserted into the positioning hole 112. A limiting portion 123 is also fixed integrally at the lower end of the fixing cover 12, and the limiting portion 123 is used to limit the maximum angle of the sealing plate 6 and the auxiliary plate 7 to flip open.

[0043] The sealing plate 6 is made of plastic material. The sealing plate 6 is installed on the assisting plate 7 and is located between the assisting plate 7 and the elastic sealing ring portion 4. The sealing plate 6 is floatingly hinged to the assisting plate 7. The floating hinge of the present application means that the sealing plate 6 can be flipped relative to the assisting plate 7 and the sealing plate 6 and the assisting plate 7 can form relative sliding at the flipping point. The specific structure is: the assisting plate 7 is integrally fixed with two hinge columns 9. The two hinge columns 9 are distributed on both sides of the assisting plate 7 and are coaxially arranged. The axis of the hinge shaft does not coincide with the hinge shaft of the assisting plate 7. The sealing plate 6 is provided with two hinge grooves 10 for the hinge columns 9 to be embedded one by one. Each hinge groove 10 is a long strip groove, and the length direction of the hinge groove 10 is perpendicular to the end face of the sealing plate 6 facing the elastic sealing ring portion 4. The hinge column 9 can slide along the length direction of the hinge groove 10 to realize floating hinge. In order to facilitate installation, an opening 13 is provided at one end of the hinge slot 10 along the length direction, and the opening 13 is gradually reduced in the direction close to the hinge slot 10, and the minimum width of the opening 13 is slightly smaller than the diameter of the hinge column 9. The meaning of slightly smaller than in this application is intended to express that an external force is required to make the hinge column 9 snap through the minimum width of the opening 13, and the actual range is generally 0.05-0.2mm smaller than the diameter of the hinge column 9, which is determined according to the elasticity of the material and the thickness of the opening 13.

[0044] In actual use, the hinge groove 10 can also be a cylindrical groove, and the diameter of the hinge groove 10 is larger than the diameter of the hinge column 9, and usually the diameter of the hinge groove 10 is twice the diameter of the hinge column 9. Alternatively, the hinge column 9 can also be fixed to the sealing plate 6, and the hinge groove 10 is opened in the power plate 7, as long as the floating hinge can be realized.

[0045] See also Figure 2 and Figure 3 The driving part 8 is used to drive the assisting plate 7 to flip so that the end face of the sealing plate 6 facing the elastic sealing ring part 4 is pressed against the lower end face of the elastic sealing ring part 4 to close the water outlet 3. The driving part 8 can be a magnet 1 81 and a magnet 2 82. The magnet 1 81 is fixed to the side of the hinge axis of the assisting plate 7 away from the water outlet 3. The magnet 2 82 is fixed to the fixed cover 12 and is located below the magnet 1 81. At this time, both the magnet 1 81 and the magnet 2 82 can be permanent magnets, or one can be a permanent magnet and the other can be a ferromagnetic material. The mutual adsorption of the magnet 1 81 and the magnet 2 82 makes the assisting plate 7 at the lower end of the water outlet 3 have a tendency to flip upward, and then press the sealing plate 6 to cover the lower end of the elastic sealing ring part 4.

[0046] In actual use, the position of magnet 81 can also be kept unchanged. Magnet 81 is fixed to the fixed cover 12 or the floor drain body 11 and is located above magnet 81. At this time, magnet 1 81 and magnet 2 82 are both permanent magnets and form a repulsive force with each other. Under the action of the repulsive force of the permanent magnet, the assisting plate 7 is pressed against the sealing plate 6; the replaceable driving part 8 can also use a spring, and the spring is installed on the fixed cover 12 or the floor drain body 11. The elastic force of the spring makes the assisting plate 7 have a tendency to press against the sealing plate 6 to cover the lower end of the elastic sealing ring part 4.

[0047] In order to make the sealing plate 6 and the elastic sealing ring part 4 more evenly pressed against each other, the end surface of the assisting plate 7 facing the sealing plate 6 has a protrusion 71, which is hemispherical and is used to press against the area of ​​the sealing plate 6 corresponding to the water outlet 3. The protrusion 71 forms a single point of abutment, so that the force points of the assisting plate 7 and the sealing plate 6 are more stable, and the protrusion 71 is located in the area of ​​the water outlet 3, so that the pressing force distribution of the sealing plate 6 and the elastic sealing ring part 4 is more even.

[0048] See also Figure 2 In order to achieve better fit between the sealing plate 6 and the elastic sealing plate 6, a sealing ring groove 41 is provided on the outer peripheral wall of the elastic sealing ring part 4, and the sealing ring groove 41 surrounds the water outlet 3. The end face of the elastic sealing ring part 4 for the sealing plate 6 to fit is provided with an end face ring groove 42, and the end face ring groove 42 surrounds the water outlet 3. The end face ring groove 42 penetrates the elastic sealing ring part 4 in the direction of the water outlet 3 area, and the groove wall of the end face ring groove 42 extends downwardly in a direction away from the axis of the floor drain core 1. In combination with the sealing ring groove 41, the lower end of the elastic sealing ring part 4 is thin-walled as a whole, thereby facilitating the deformation of the lower end of the elastic sealing ring part 4 and achieving better fit. See Figure 4 The end face annular groove 42 can also be provided at the middle position of the lower end face of the elastic sealing ring portion 4. In this case, the end face annular groove 42 is a groove shape that expands downward. Figure 4 ,.

[0049] See also Figure 2 The end surface of the sealing plate 6 for contacting the elastic sealing ring 4 is provided with an annular convex strip 61, which is located in the water outlet 3 area, and the annular convex strip 61 and the inner wall of the elastic sealing ring 4 form a guide channel 14. After the drain core is drained, the guide channel 14 can guide the liquid remaining on the sealing plate 6 and located at the periphery of the annular convex strip 61, so that this part of the liquid is fully utilized to strengthen the water film formed by the liquid on the contact surface of the sealing plate 6 and the elastic sealing ring 4 to enhance the sealing effect.

[0050] The working principle of this embodiment is:

[0051] When draining water, the water flow through the floor drain core 1 impacts the sealing plate 6, so that the sealing plate 6 overcomes the reset tendency of the driving part 8 and flips open to achieve drainage. After draining water, the driving part 8 drives the auxiliary plate 7 to press against the sealing plate 6 and drives the sealing plate 6 to flip and cover the lower end of the elastic sealing ring part 4 to achieve sealing. The floating hinged manner of the sealing plate 6 makes the sealing plate 6 no longer form a hinged force arm, reduces the situation of local deformation caused by uneven force on the elastic sealing ring part 4, improves the service life, and makes the sealing effect more stable.

[0052] Embodiment 2:

[0053] A floor drain core, see Figure 5 The difference from the first embodiment is that a capillary strip 15 is fixed to the outer wall of the elastic sealing ring portion 4. The capillary strip 15 is a cotton strip. The capillary strip 15 surrounds the sealing ring portion 4. The capillary strip 15 is used to abut against the outer edge of the sealing plate 6 where the elastic sealing ring portion 4 is attached.

[0054] The end surface of the limiting portion 123 facing the assisting plate 7 is fixed with an elastic water storage portion 16, which is connected to the capillary strip 15 to supply water to the capillary strip 15. The elastic water storage portion 16 is located between the assisting plate 7 and the limiting portion 123. When the sealing plate 6 is opened so that the assisting plate 7 is turned over and close to the limiting portion 123, the assisting plate 7 and the limiting portion 123 squeeze the elastic water storage portion 16 to achieve drainage of the elastic water storage portion 16. The elastic water storage portion 16 has a water guide bar 17, which is fixed to the sealing plate 6 and is used to guide the liquid flowing through the sealing plate 6 to replenish the elastic water storage portion 16.

[0055] In actual use, the elastic water storage part 16 can be a sponge block, and the water guide bar 17 can be a sponge bar fixed integrally with the sponge block, and the water guide bar 17 is fixed to one end of the sealing plate 6 close to the hinge axis of the assisting plate 7. When the sealing plate 6 is turned over toward the water outlet 3, the water flow impact point is located at the point where the convex point is far away from the hinge axis of the assisting plate 7. Based on the floating hinge feature, the end of the sealing plate 6 close to the hinge axis of the assisting plate 7 is close to the water outlet 3. At this time, the water guide bar 17 can absorb water and guide the water to the sponge block.

[0056] Alternatively, see Figure 6, the elastic water storage part 16 can be a rubber water bag, and the capillary strip 15 is connected to the rubber water bag. At this time, the water diversion strip 17 is a rubber hose connected to the inside of the rubber water bag. The end of the water diversion strip 17 away from the rubber water bag is the water diversion end. The water diversion end is connected to the upper end surface of the sealing plate 6 and is located in the area surrounded by the annular convex strip 61. The water diversion end is away from the hinge axis of the power-assisting plate 7 and the upper end surface is flush with the end surface of the sealing plate 6. When the sealing plate 6 is opened and drives the power-assisting plate 7 to rotate, the rubber water bag is squeezed so that the water stored in the rubber water bag is discharged from the water diversion end. When the sealing plate 6 is closed, the rubber water bag swells under the action of elastic force to absorb water from the water diversion end. In addition, the area surrounded by the annular convex strip 61 can also form a water storage area, and can also replenish water for the rubber water bag.

[0057] The working principle of this embodiment is:

[0058] The elastic water storage part 16 continuously supplies water to the capillary strip 15, making the water film sealing effect more durable and stable. The sealing plate 6 is opened to squeeze the elastic water storage part 16 to drain water. When the sealing plate 6 is closed, the water guide strip 17 guides the elastic water storage part 16 to absorb water. Each time the sealing plate 6 is opened, the elastic water storage part 16 is squeezed to drain water, which reduces the growth of bacteria and makes the water replenishment operation of the elastic water storage part 16 more convenient.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A floor drain core, characterized in that: The invention comprises a floor drain core (1), wherein the floor drain core (1) has a water inlet (2) and a water outlet (3), wherein the water outlet (3) is fixed with an elastic sealing ring portion (4), wherein the elastic sealing ring portion (4) surrounds the water outlet (3), wherein the floor drain core (1) is floatingly hinged with a sealing plate (6), wherein the floor drain core (1) is also hinged with a power-assisting plate (7), and wherein the floor drain core (1) is further provided with a driving portion (8), wherein the driving portion (8) is used to drive the power-assisting plate (7) to flip so that the sealing plate (6) is pressed against the elastic sealing ring portion (4) to close the water outlet (3); wherein the outer wall of the elastic sealing ring portion (4) is provided with a capillary strip (15), wherein the capillary strip (15) surrounds the elastic sealing ring portion (4), and wherein the capillary strip (15) is used to press against the sealing plate (6) to close the water outlet (3). ) is in contact with the outer edge of the elastic sealing ring portion (4); the floor drain core (1) is provided with a limiting portion (123), the limiting portion (123) is used to limit the maximum angle of the sealing plate (6) and the assisting plate (7) to flip open, the limiting portion (123) is provided with an elastic water storage portion (16), the elastic water storage portion (16) is connected to the capillary strip (15) and is used to supply water to the capillary strip (15); when the sealing plate (6) is opened, the assisting plate (7) and the limiting portion (123) squeeze the elastic water storage portion (16); the elastic water storage portion (16) has a water guide strip (17), the water guide strip (17) is fixed to the sealing plate (6), and the water guide strip (17) is used to guide the liquid flowing through the sealing plate (6) to replenish the elastic water storage portion (16).

2. The floor drain core according to claim 1, characterized in that: The sealing plate (6) is mounted on the assisting plate (7), and the sealing plate (6) is connected to the floor drain core (1) through the assisting plate (7); the assisting plate (7) is provided with a hinge column (9), and the sealing plate (6) is provided with a hinge groove (10) for the hinge column (9) to be embedded, the hinge groove (10) is a long groove, and the length direction of the hinge groove (10) is perpendicular to the end surface of the sealing plate (6) that is in contact with the elastic sealing ring part (4), and the hinge column (9) can slide along the length direction of the hinge groove (10) to realize floating hinge.

3. The floor drain core according to claim 2, characterized in that: The sealing plate (6) is made of plastic material. An opening (13) is provided at one end of the hinge groove (10) along the length direction. The opening (13) is gradually narrowed in a direction approaching the hinge groove (10). The minimum width of the opening (13) is slightly smaller than the diameter of the hinge column (9).

4. The floor drain core according to claim 3, characterized in that: The hinged columns (9) are provided with two hinged columns (9), which are distributed on both sides of the power-assisting plate (7) and are coaxially arranged, and the hinged grooves (10) are arranged correspondingly.

5. The floor drain core according to claim 1, characterized in that: The outer peripheral wall of the elastic sealing ring portion (4) is provided with a sealing ring groove (41), and the sealing ring groove (41) surrounds the water outlet (3).

6. The floor drain core according to claim 1, characterized in that: An end surface of the elastic sealing ring portion (4) for the sealing plate (6) to abut against is provided with an end surface annular groove (42), and the end surface annular groove (42) surrounds the water outlet (3).

7. The floor drain core according to claim 1, characterized in that: The end surface of the boosting plate (7) facing the sealing plate (6) has a protrusion (71), and the protrusion (71) is used to abut against the area of ​​the sealing plate (6) corresponding to the water outlet (3).

8. The floor drain core according to claim 1, characterized in that: The sealing plate (6) is provided with an annular convex strip (61) on its end surface for contacting with the elastic sealing ring portion (4); the annular convex strip (61) is located in the water outlet (3) area; the annular convex strip (61) and the inner wall of the elastic sealing ring portion (4) form a guide channel (14).

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