CN111287271A - Sink Drain Assemblies with Self-Blocking - Google Patents

Abstract

The invention discloses a water tank drainage assembly with an automatic plugging function, which comprises a filter basket and a shell, wherein the lower end of the shell is connected with a drainage pipe; a fourth annular step is arranged on the inner peripheral wall of the lower end of the shell, a limiting ring is in threaded connection with the fourth annular step, a pressing sleeve is sleeved outside the drain pipe and is in threaded connection with the outer peripheral wall of the shell, and a second sealing ring is embedded between the upper end surface of the drain pipe and the lower end surface of the shell; a supporting disc is arranged in the shell above the limiting ring; a pressure plate is arranged below the supporting plate, a sliding rod is integrally formed in the middle of the upper end face of the pressure plate, the sliding rod movably penetrates through the supporting plate and then extends out of the supporting plate and is matched and clamped with a clamp spring, a second spring is sleeved outside the sliding rod between the supporting plate and the pressure plate, and a third sealing ring is attached to the edge of the lower end face of the pressure plate; a push rod is arranged on the inner side of the drain pipe; when the drainage pipe in the drainage device is separated from the shell, the shell can automatically stop drainage.

Description

Sink Drain Assemblies with Self-Blocking

technical field

The invention relates to the technical field of water tank drainage components, in particular to a water tank drainage component with an automatic blocking function.

Background technique

The sink drainage assembly is an indispensable part of the sink. The current sink drainage assembly mainly includes a filter basket and a shell. The bottom surface of the upper end of the body is fitted with a sealing ring for abutting against the inner bottom of the water tank to seal the casing and the water tank, the lower end of the casing is connected with a drain pipe, and the interior of the upper end of the casing is provided with a cavity for accommodating the filter basket. When the water tank drainage assembly is assembled with the water tank, the sealing ring is pressed against the inner bottom of the water tank, and the pressure ring is pressed against the outer bottom of the water tank. However, during the drainage process of the current sink drainage assembly, if there is an unexpected situation in which the drainage pipe is separated from the casing (because the current drainage pipe is pressed on the casing by the pressure sleeve, and the pressure sleeve and the casing are both made of plastic materials In the long-term use of the pressing sleeve and the shell, the phenomenon that the pressing sleeve is separated from the casing is prone to occur. Once the pressing sleeve is separated from the casing, the drain pipe will appear to be separated from the casing. The drained water will fall directly into the space under the sink, thereby causing pollution to the space under the sink, and as a result, the user needs to clean up, causing inconvenience to the user.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a water tank drainage assembly with an automatic blocking function. When the internal drainage pipe is separated from the casing, the pressure plate will lose the thrust of the push rod. At this time, the second spring It will push the pressure plate so that the pressure plate presses the third sealing ring on the limit ring, that is, the casing can be blocked. In this way, when the drain pipe is separated from the casing, the casing can automatically stop the drainage. function, so as to prevent sewage from polluting the cabinet.

The water tank drainage assembly with automatic blocking function of the present invention includes a filter basket and a ring-shaped casing. The bottom surface of the upper end of the body is fitted with a first sealing ring for abutting against the inner bottom of the water tank to seal the casing and the water tank; the interior of the upper end of the casing is provided with a cavity for accommodating the filter basket, and the lower end of the casing is connected with a drain A fourth annular step is arranged on the inner peripheral wall of the lower end of the casing, a limit ring is threadedly connected in the fourth annular step, the lower end face of the limit ring is flush with the lower end face of the casing, and a pressure sleeve is sleeved on the outside of the drain pipe , the pressure sleeve is threadedly connected to the outer peripheral wall of the casing, the upper end of the drain pipe is pressed against the lower end of the casing through the pressure sleeve, and a second sealing ring is embedded between the upper end face of the drain pipe and the lower end face of the casing, and the second The lower surface of the sealing ring is in close contact with the upper end surface of the drain pipe, and the upper end surface of the second sealing ring is in close contact with the lower end surface of the casing and the lower end surface of the limit ring; a support plate is arranged in the casing above the limit ring The outer peripheral wall of the support plate is integrally formed with a number of first connecting strips that are evenly distributed in the circumferential direction, and the outer end of each first connecting strip is connected to the side wall of the casing as a whole; the bottom of the support plate is provided with The middle of the upper end face of the pressure plate is integrally formed with a sliding rod. The sliding rod moves through the supporting plate and then protrudes out of the supporting plate and is matched with a clamping spring. The outer sleeve of the sliding rod between the supporting plate and the pressure plate is useful. A second spring that pushes the pressure plate against the limit ring, the upper and lower ends of the second spring are pressed against the support plate and the pressure plate respectively, the outer diameter of the pressure plate is larger than the inner diameter of the limit ring, and the pressure plate A third sealing ring is attached to the edge of the lower end surface; the inner side of the drain pipe is provided with a push rod for pushing the pressure plate to make the pressure plate separate from the limit ring, and the outer peripheral wall of the lower end of the push rod is integrally formed with a number of circumferential strips. To the evenly distributed second connecting strips, the outer end of each second connecting strip is integrally connected with the side wall of the drain pipe.

In the water tank drainage assembly with automatic blocking function of the present invention, the bottom of the cavity is provided with a slip ring made of iron material, the slip ring is vertically slidably connected in the cavity, and the bottom of the cavity is provided with a supporting sliding ring. The first annular step of the ring; the opening at the upper end of the cavity is provided with a retaining ring made of iron material and used to block the slip ring to prevent the slip ring from falling out of the cavity, and the inner peripheral wall of the upper end of the cavity is provided with a retaining ring for supporting The second annular step of the retaining ring, the retaining ring is threadedly connected with the second annular step; the bottom surface of the upper end of the filter basket is bonded with a first magnetic ring, after the filter basket is installed in the cavity, the first magnetic ring and the retaining ring magnetically attract A support seat is installed in the casing under the slip ring, and a push frame for pushing the slip ring is installed on the support seat to slide up and down. The bulge of the slip ring is blocked, and the upper end surface of the push frame located outside the bulge is embedded with a second magnetic ring for magnetically attracting the slip ring, and the upper end surface of the bulge is integrally formed with a vertical extension. and is used for the ejector rod against the bottom of the filter basket, a ejector mechanism for pushing the ejector rack is installed between the ejector frame and the support seat; the attractive force of the first magnetic ring and the retaining ring is greater than that of the second magnetic ring and the second magnetic ring. The attractive force of the slip ring, the attractive force of the first magnetic ring and the retaining ring is greater than the thrust of the push mechanism; when the filter basket inside the casing is taken out from the casing and cleaned, the push frame and the slip ring inside the casing are removed. The casing can be blocked under the cooperative action, so that the sundries can be prevented from directly entering the drain pipe connected with the casing through the casing, that is, the phenomenon of blockage of the drain pipe can be effectively avoided; in addition, after the filter basket is taken out , the sundries falling into the cavity can be ejected from the cavity under the action of the slip ring and the ejector.

In the water tank drainage assembly with automatic blocking function of the present invention, a support ring is sleeved on the outside of the support seat, a third annular step for supporting the support ring is provided on the inner peripheral wall of the casing, and the support ring is embedded with the third annular step. In combination, the outer peripheral wall of the lower end of the support seat is integrally formed with a number of connecting ribs that are evenly distributed in the circumferential direction. The inner peripheral wall is integrally formed; after adopting this structure, the support seat can be reliably installed in the casing, and the gap formed between the adjacent connecting ribs, the support seat and the support ring can be used for drainage.

According to the water tank drainage assembly with automatic blocking function of the present invention, the lower end surface of the push frame is provided with a blind hole into which the support seat is inserted, the support seat is slidably connected with the inner wall of the blind hole, and an upper end opening is arranged inside the support seat The push mechanism includes a first spring, the first spring is installed in the counterbore, the lower end of the first spring is in contact with the bottom of the counterbore, and the upper end of the first spring is in contact with the inner top of the blind hole; the first magnetic ring The attractive force with the retaining ring is greater than the maximum elastic force of the first spring; after adopting this structure, when the filter basket is taken out from the cavity, the first spring can push the pusher to move up, and the protrusion can be pre-inserted into the slide. After the second magnetic ring and the slip ring are magnetically attracted in the ring, the push frame and the slip ring can be connected into one body. During the process of the first spring continuously pushing the push frame, the push frame can push the slip ring so that the slip ring is finally pushed. against the retaining ring.

When the drain pipe inside the present invention is separated from the casing, the pressure plate will lose the thrust of the push rod. At this time, the second spring will push the pressure plate so that the pressure plate presses the third sealing ring on the limit ring, that is, The casing can be blocked, so that when the drainage pipe is detached from the casing, the casing can automatically realize the function of stopping the drainage, thereby avoiding the pollution of the cabinet by the sewage.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is a schematic cross-sectional view of the filter basket after the filter basket is assembled into the cavity and the drain pipe is connected to the housing;

Figure 2 is a schematic cross-sectional structural diagram of the filter basket taken out from the cavity and the drain pipe detached from the housing;

Fig. 3 is the bottom view structure schematic diagram of the shell;

Figure 4 is a schematic top view of the structure of the drainage pipe;

FIG. 5 is a schematic bottom view of the structure after the support base, the connecting ribs and the support ring are integrally formed.

Detailed ways

Various embodiments of the present invention will be disclosed in the drawings below, and for the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and components will be shown in a simple schematic manner in the drawings.

In addition, descriptions such as “first”, “second”, etc. in the present invention are only for the purpose of description, and do not refer to the meaning of order or sequence, nor are they used to limit the present invention. The components or operations are described by the same technical terms, and should not be construed as indicating or implying their relative importance or implying the quantity of the indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The water tank drainage assembly with automatic blocking function of the present invention includes a filter basket 1 and a ring-shaped casing 2. The outer shell of the casing 2 is sheathed with a threaded connection with the casing 2 and used for abutting against the outer bottom of the water tank. Pressure ring 3, the bottom surface of the upper end of the housing 2 is fitted with a first sealing ring 4 for abutting against the inner bottom of the water tank to seal the housing 2 and the water tank; The cavity 21, the lower end of the casing 2 is connected with the drain pipe 10; the inner peripheral wall of the lower end of the casing 2 is provided with a fourth annular step 25, and the fourth annular step 25 is threadedly connected with a limit ring 26, and the limit ring 26 is in When the fourth annular step 25 is threadedly connected, the outside of the limit ring 26 is wrapped with a raw material tape, and the raw material tape is used to seal the space between the limit ring and the fourth annular step. The lower end face is flush with the lower end face of the casing 2, the outer part of the drain pipe 10 is sleeved with a pressure sleeve 101, the pressure sleeve 101 is threadedly connected with the outer peripheral wall of the casing 2, and the upper end of the drain pipe 10 is pressed against the casing by the pressure sleeve 101. 2, a second sealing ring 102 is embedded between the upper end surface of the drain pipe 10 and the lower end surface of the housing 2, the lower surface of the second sealing ring 102 is in close contact with the upper end surface of the drain pipe 10, and the second sealing ring The upper end face of 102 is in close contact with the lower end face of the casing 2 and the lower end face of the limit ring 26; the casing 2 located above the limit ring 26 is provided with a support plate 27, and the outer peripheral wall of the support plate 27 is integrally formed with several The strips are first connecting strips 271 evenly distributed in the circumferential direction, and the outer end of each first connecting strip 271 is connected to the side wall of the casing 2 as a whole; A sliding rod 281 is integrally formed in the middle of the upper end face of the upper end surface of the upper end of the sliding rod. A second spring 283 is set on the outside for pushing the pressure plate 28 to make the pressure plate 28 abut against the limit ring 26 . The outer diameter is larger than the inner diameter of the limiting ring 26 , and a third sealing ring 284 is attached to the edge of the lower end surface of the pressure plate 28 ; The push rod 103, the outer peripheral wall of the lower end of the push rod 103 is integrally formed with a plurality of second connecting bars 104 evenly distributed in the circumferential direction, and the outer end of each second connecting bar 104 is connected with the side wall of the drain pipe 10. When the internal drainage pipe of the present invention is separated from the casing, the pressure plate will lose the thrust of the push rod. At this time, the second spring will push the pressure plate so that the pressure plate presses the third sealing ring against the limit ring. In this way, when the drain pipe is detached from the casing, the casing can automatically realize the function of stopping the drainage, so as to avoid the pollution of the cabinet by the sewage.

The bottom of the cavity 21 is provided with a slip ring 5 made of iron material, the slip ring 5 is vertically slidably connected in the cavity 21, and the bottom of the cavity 21 is provided with a first annular step 22 for supporting the slip ring 5; The opening of the upper end of the cavity 21 is provided with a retaining ring 6 made of iron material and used to block the slip ring 5 to prevent the slip ring 5 from falling out of the cavity 21. The inner peripheral wall of the upper end of the cavity 21 is provided with a retaining ring for supporting the retaining ring. The second annular step 23 of The ring 11 is magnetically engaged with the retaining ring 6; the housing 2 under the slip ring 5 is provided with a support seat 7, and the support seat 7 is slidably installed with a push frame 8 for pushing the slip ring 5. The push frame The middle part of the upper end face of 8 is integrally formed with a protrusion 81 for inserting into the slip ring 5 to block the slip ring 5, and the upper end surface of the pusher 8 located outside the protrusion 81 is embedded with a magnetic attraction with the slip ring 5. The second magnetic ring 82 is closed, and the upper end surface of the protrusion 81 is integrally formed with a push rod 83 that extends in the vertical direction and is used to abut against the bottom of the filter basket 1, and is installed between the push frame 8 and the support base 7 There is a push mechanism for pushing the push frame 8; the attractive force of the first magnetic ring 11 and the retaining ring 6 is greater than the attractive force of the second magnetic ring 82 and the slip ring 5, and the attractive force of the first magnetic ring 11 and the retaining ring 6 It is greater than the thrust of the push mechanism; when the filter basket inside the casing is taken out from the casing and cleaned, the casing can be blocked under the cooperation of the push frame and the slip ring inside, so as to avoid miscellaneous Through the shell, the objects directly enter the drain pipe connected to the shell, which can effectively avoid the blockage of the drain pipe; in addition, after the filter basket is taken out, the debris that falls into the cavity can be trapped in the slip ring and the roof. It is ejected from the cavity under the action of the push frame.

A support ring 71 is sheathed on the outside of the support seat 7, and a third annular step 24 for supporting the support ring 71 is provided on the inner peripheral wall of the housing 2. The support ring 71 is fitted with the third annular step 24, and the outer circumference of the lower end of the support seat 7 The wall is integrally formed with a number of connecting ribs 72 that are evenly distributed in the circumferential direction. Each connecting rib 72 extends along the radial direction of the support seat 7 , and the outer end of each connecting rib 72 is connected to the inner peripheral wall of the support ring 71 . It is integrally formed; after adopting this structure, the support seat can be reliably installed in the casing, and the gap formed between the adjacent connecting ribs, the support seat and the support ring can be used for drainage.

A blind hole 84 for inserting the support seat 7 is provided on the lower end surface of the push frame 8, the support seat 7 is slidably connected with the inner wall of the blind hole 84, and the inside of the support seat 7 is provided with a counterbore 73 with an upper end open. The push mechanism includes: The first spring 9, the first spring 9 is installed in the counterbore 73, the lower end of the first spring 9 is in contact with the bottom of the counterbore 73, and the upper end of the first spring 9 is in contact with the inner top of the blind hole 84; the first magnetic ring 11 The attractive force with the retaining ring 6 is greater than the maximum elastic force of the first spring 9; by adopting this structure, when the filter basket is taken out from the cavity, the first spring can push the push frame to move up, and the protrusion can be inserted in advance. After the second magnetic ring and the slip ring are magnetically attracted to the slip ring, the push frame and the slip ring can be connected into one body. During the process that the first spring continues to push the push frame, the push frame can push the slip ring to make the sliding ring. The ring eventually rests against the retaining ring.

When installing the present invention, pass the casing through the through hole at the bottom of the water tank, then screw the pressure ring to the outside of the casing, and then tighten the pressure ring to make the first sealing ring abut against the inner bottom of the water tank, so that the pressure ring It is in close contact with the outer bottom of the water tank; during the use of the present invention, when the water tank is in a draining state and the filter basket needs to be cleaned because the filter basket is blocked by debris, the filter basket is taken out from the cavity. At this time, the first spring It can push the push frame to move up, the protrusion can be inserted into the slip ring in advance, and the second magnetic ring and the slip ring can be magnetically attracted, so that the push frame and the slip ring can be connected together, and the first spring continues to push the push frame. During the process, the push frame can push the slip ring so that the slip ring finally touches the retaining ring. In this way, debris can be prevented from directly entering the drainage pipe connected to the shell through the casing, that is, the phenomenon of blocking the drainage pipe can be effectively avoided; in addition, after the filter basket is taken out, the debris falling into the cavity can Under the action of the slip ring and the push frame, it is ejected from the cavity (after the debris is ejected from the cavity, when the filter basket is installed again, the debris can be prevented from directly entering the drain pipe through the shell); filter After the basket is cleaned, put the filter basket back into the cavity and press the filter basket down. During the process of pressing the filter basket down, the slip ring can be in contact with the first annular step in advance. The ring can be disengaged from the second magnetic ring (because the attractive force of the first magnetic ring and the retaining ring is greater than that of the second magnetic ring and the slip ring, in this way, the attractive force of the second magnetic ring and the slip ring can be avoided. Cause the ejector rack to move up automatically), after the filter basket moves down, the first magnetic ring and the retaining ring can be magnetically attracted, and the filter basket can maintain the state of pressing down the ejector rod and the ejector rack (due to the first magnetic ring and the retaining ring). The attractive force of a magnetic ring and the retaining ring is greater than the maximum elastic force of the first spring), that is, a gap is formed between the push frame and the slip ring for drainage.

When the internal drainage pipe of the present invention is separated from the casing, the pressure plate will lose the thrust of the push rod. At this time, the second spring will push the pressure plate so that the pressure plate presses the third sealing ring on the limit ring, That is, the casing can be blocked, so that when the drain pipe is detached from the casing, the casing can automatically realize the function of stopping the drainage, thereby preventing the sewage from polluting the cabinet; when the sewage inside the sink is cleaned by the user. After the replacement of the pressure sleeve on the outside of the drain pipe and reconnecting the drain pipe to the lower end of the housing, the push rod inside the drain pipe can push the pressure plate again, that is, the third sealing ring can be released from the limit circle, in this way, the present invention can drain the water normally again.

The above descriptions are merely embodiments of the present invention, and are not intended to limit the present invention. Various modifications and variations of the present invention are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims (4)

1. A sink drainage assembly with an automatic plugging function comprises a filter basket (1) and an annular shell (2), wherein a pressing ring (3) which is in threaded connection with the shell (2) and is used for being abutted against the outer bottom of a sink is sleeved outside the shell (2), and a first sealing ring (4) which is used for being abutted against the inner bottom of the sink to seal the shell (2) and the sink is attached to the bottom surface of the upper end of the shell (2); a containing cavity (21) for containing the filter basket (1) is formed in the upper end of the shell (2), and a drain pipe (10) is connected to the lower end of the shell (2); the method is characterized in that: a fourth annular step (25) is arranged on the inner peripheral wall of the lower end of the shell (2), a limiting ring (26) is connected to the fourth annular step (25) in a threaded manner, the lower end face of the limiting ring (26) is flush with the lower end face of the shell (2), a pressing sleeve (101) is sleeved outside the drain pipe (10), the pressing sleeve (101) is in threaded connection with the outer peripheral wall of the shell (2), the upper end of the drain pipe (10) is tightly pressed at the lower end of the shell (2) through the pressing sleeve (101), a second sealing ring (102) is embedded between the upper end face of the drain pipe (10) and the lower end face of the shell (2), the lower surface of the second sealing ring (102) is tightly abutted against the upper end face of the drain pipe (10), and the upper end face of the second sealing ring (102) is tightly abutted against the lower end face of the shell (2) and the lower end face of the limiting ring; a supporting disc (27) is arranged in the shell (2) above the limiting ring (26), a plurality of first connecting strips (271) which are uniformly distributed in the circumferential direction are integrally formed on the peripheral wall of the supporting disc (27), and the outer end part of each first connecting strip (271) is connected with the side wall of the shell (2) into a whole; a pressure plate (28) is arranged below the supporting plate (27), a sliding rod (281) is integrally formed in the middle of the upper end face of the pressure plate (28), the sliding rod (281) movably penetrates through the supporting plate (27), extends out of the supporting plate (27) and is matched and clamped with a clamp spring (282), a second spring (283) used for pushing the pressure plate (28) to enable the pressure plate (28) to abut against the limiting ring (26) is sleeved outside the sliding rod (281) between the supporting plate (27) and the pressure plate (28), the upper end and the lower end of the second spring (283) abut against the supporting plate (27) and the pressure plate (28) respectively, the outer diameter of the pressure plate (28) is larger than the inner diameter of the limiting ring (26), and a third sealing ring (284) is attached to the edge of the lower end face of the pressure plate (28); the inner side of the drain pipe (10) is provided with a push rod (103) which is used for pushing the pressure plate (28) to enable the pressure plate (28) to be separated from the limiting ring (26), a plurality of second connecting strips (104) which are uniformly distributed in the circumferential direction are integrally formed on the outer circumferential wall of the lower end of the push rod (103), and the outer end part of each second connecting strip (104) is connected with the side wall of the drain pipe (10) into a whole.

2. A sink drain assembly with an automatic blocking function according to claim 1, wherein a sliding ring (5) made of an iron material is arranged at the bottom of the cavity (21), the sliding ring (5) is vertically slidably connected in the cavity (21), and a first annular step (22) for supporting the sliding ring (5) is arranged at the bottom of the cavity (21); a retainer ring (6) which is made of an iron material and used for blocking the sliding ring (5) to prevent the sliding ring (5) from falling out of the accommodating cavity (21) is mounted at an opening at the upper end of the accommodating cavity (21), a second annular step (23) used for supporting the retainer ring (6) is arranged on the inner peripheral wall at the upper end of the accommodating cavity (21), and the retainer ring (6) is in threaded connection with the second annular step (23); a first magnetic ring (11) is bonded on the bottom surface of the upper end of the filtering basket (1), and after the filtering basket (1) is installed in the containing cavity (21), the first magnetic ring (11) is magnetically attracted with the check ring (6); a supporting seat (7) is installed in the shell (2) below the sliding ring (5), a pushing frame (8) used for pushing the sliding ring (5) is installed on the supporting seat (7) in a vertically sliding mode, a protrusion (81) used for being inserted into the sliding ring (5) to block the sliding ring (5) is integrally formed in the middle of the upper end face of the pushing frame (8), a second magnetic ring (82) used for being magnetically attracted with the sliding ring (5) is embedded in the upper end face of the pushing frame (8) located on the outer side of the protrusion (81), an ejector rod (83) extending in the vertical direction and used for abutting against the bottom of the filtering basket (1) is integrally formed on the upper end face of the protrusion (81), and a pushing mechanism used for pushing the pushing frame (8) is installed between the pushing frame (8) and the supporting seat (7); the attractive force between the first magnetic ring (11) and the retainer ring (6) is greater than the attractive force between the second magnetic ring (82) and the slip ring (5), and the attractive force between the first magnetic ring (11) and the retainer ring (6) is greater than the thrust of the pushing mechanism.

3. The water tank drainage assembly with the automatic blocking function according to claim 2, wherein a support ring (71) is sleeved outside the support seat (7), a third annular step (24) for supporting the support ring (71) is arranged on the inner peripheral wall of the shell (2), the support ring (71) is embedded in the third annular step (24), a plurality of connecting ribs (72) are integrally formed on the outer peripheral wall of the lower end of the support seat (7) and are uniformly distributed in the circumferential direction, each connecting rib (72) extends in the radial direction of the support seat (7), and the outer end of each connecting rib (72) is integrally formed with the inner peripheral wall of the support ring (71).

4. The water tank drainage assembly with the automatic plugging function according to claim 3, wherein a blind hole (84) for inserting the supporting seat (7) is formed in the lower end face of the pushing frame (8), the supporting seat (7) is slidably connected with the inner wall of the blind hole (84), a counter bore (73) with an open upper end is formed in the supporting seat (7), the pushing mechanism comprises a first spring (9), the first spring (9) is installed in the counter bore (73), the lower end of the first spring (9) abuts against the bottom of the counter bore (73), and the upper end of the first spring (9) abuts against the inner top of the blind hole (84); the attraction force between the first magnetic ring (11) and the retainer ring (6) is greater than the maximum elastic force of the first spring (9).

Images