Floor drain core

Abstract

The application provides a floor drain core, and belongs to the technical field of floor drains. The floor drain core solves the problem of poor return stability of the existing floor drain core. The floor drain core comprises a shell with a water inlet and a water outlet and a blocking piece for blocking the water outlet, a support arm in the form of a long strip is arranged at the water inlet in the shell, the support arm has a connecting end and an outer end extending to the central position of the shell, the connecting end of the support arm is fixedly connected to the inner side of the shell or integrally connected to the inner side of the shell, the upper surface of the support arm has a flow guide surface that gradually inclines downward from the connecting end to the outer end, a guide piece is axially fixed to the bottom of the support arm, the blocking piece can move along the axial direction of the guide piece, and a reset assembly that enables the blocking piece to always have a tendency to move upward is arranged between the guide piece and the blocking piece. The floor drain core has the advantage of good return stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of floor drains and relates to a floor drain core. BACKGROUND

[0002] A floor drain is an important device connecting a drainage pipe system and an indoor floor and is an important part of a drainage system in a residence. A floor drain core is a core component of the floor drain and is used to ensure that the floor drain has the characteristics of fast drainage, odor prevention, blockage prevention and easy cleaning. For example, a magnetic suspension floor drain core is disclosed in Chinese patent document [Patent No.: ZL201510353360.4; Application Publication No.: CN104863246B] and includes a core body having a water inlet and a water outlet and a sealing cover in the shape of an umbrella. A magnet two is arranged in the sealing cover. A shell with a closed inner cavity and supporting the sealing cover is fixed below the water outlet of the core body and serves as a supporting and guiding structure. A magnet one is fixed in the inner cavity of the shell supporting the sealing cover. The magnet one is below the magnet two. The sealing cover is between the water outlet and the shell. The repulsive force between the magnet one and the magnet two makes the sealing cover tightly adhere to the water outlet to seal the water outlet.

[0003] In the above structure, the sealing cover is arranged in the shape of an umbrella and has an umbrella cap blocking the water outlet and a guide rod arranged in the shell. During the drainage of the floor drain, the umbrella cap of the sealing cover avoids impurities in the water flow from adhering to the guide rod below to avoid the increase in the weight of the sealing cover and ensure the sealing property of the water outlet. In actual application, the application scenarios of the floor drain also include a bathroom. People usually generate a large amount of hair during the use of the bathroom. Therefore, the water flow discharged contains hair. In the structure of the floor drain core, a connecting arm extending downward of the water outlet is arranged on the core body to provide support for the shell supporting the sealing cover. The connecting arm is fixed to the shell supporting the sealing cover. This structure forms a hook-like structure between the connecting arm and the shell supporting the sealing cover. Since the water flow flows downward, the hair in the water flow is easily retained between the shell supporting the sealing cover and the connecting arm during the falling process of the water flow. The retained hair easily entangles the sealing cover and limits the return of the sealing cover to block the water outlet. Therefore, the floor drain has the problem of poor return stability. SUMMARY

[0004] The purpose of the present application is to solve the problem of poor return stability of the floor drain.

[0005] The purpose of the present application can be achieved by the following technical solutions.

[0006] A floor drain core, comprising a shell with a water inlet and a water outlet and a blocking member for blocking the water outlet, characterized in that a support arm in the shape of a long strip is arranged in the shell at the water inlet, the support arm has a connecting end and an outer end extending to the center of the shell, the connecting end of the support arm is fixed to or integrally connected with the inner side of the shell, the upper surface of the support arm has a guide surface gradually inclined downward from the connecting end to the outer end, a guide member is axially fixed to the bottom of the support arm, the blocking member is movable along the axial direction of the guide member, and a reset assembly is arranged between the guide member and the blocking member to make the blocking member always have a tendency to move upward.

[0007] The floor drain core of the present application can be applied to existing floor drain structures. Specifically, the structure of the floor drain core of the present application is as follows: a support arm extending to the center of the shell is arranged in the water inlet of the shell, and a guide surface gradually inclined downward from the connecting end to the outer end is arranged on the upper surface of the support arm. The water flowing onto the support arm is guided by the guide surface. The inclined guide structure increases the flow rate of the water at the upper part of the support arm to form an impact, thereby preventing the dirt from being retained at the upper part of the support arm. On this basis, the guide member for supporting the blocking member is axially fixed to the bottom of the support arm, so that the support arm plays a protective role on the guide member of the blocking member, thereby avoiding the formation of a hanging point around the guide member for the hair to hang on, and preventing the hair from being retained between the guide member and the support arm to the greatest extent. The guide member is arranged at a position where the blocking member is suspended, thereby preventing the dirt falling from the water inlet from being retained at the water outlet to interfere with the movement of the blocking member, ensuring that the movement of the blocking member is not disturbed by external objects, and thereby improving the stability of the floor drain reset.

[0008] In the floor drain core described above, the guide surface is a flat surface, and the width of the guide surface gradually decreases from the connecting end to the outer end of the support arm. This structure is arranged on the basis of the structure in which the guide surface gradually inclines downward from the connecting end to the outer end of the support arm. During drainage, the downwardly inclined guide surface forms a water potential for the water flow, the flow rate of the water flow is increased, the width of the guide surface is reduced, the water flow falls from around the support arm during the flow along the length direction of the guide surface, and the guide surface increases the flow rate of the water flow while preventing the dirt in the water flow from being retained at the water inlet.

[0009] In the drain core, the flow guide surface is in the shape of a sector, the two sides of the support arm gradually shrink from the connecting end to the outer end, and the flow guide surface and the side of the support arm have a round corner. The flow guide surface in the shape of a sector differentiates the size of the connecting end and the outer end, which improves the stability of the connection of the support arm, maximally reduces the shielding of the water inlet by the support arm, and further guides the water flow to smoothly fall from the side of the support arm in the process of flowing along the support arm by means of the round corner structure, so as to avoid the concentrated falling of the water flow, reduce the impact of the water flow on the sealing element, ensure the stability of the movement of the sealing element along the guide element, and avoid the interference of the dirt mixed in the water flow on the circulation of the subsequent water flow and the movement of the sealing element, thereby improving the stability of the return of the drain.

[0010] In the drain core, the connecting end of the support arm and the shell are smoothly connected. The dirt is prevented from being accumulated at the connecting end of the support arm and the shell by the smooth connection. In the embodiment, the support arm and the shell are in an integrated structure. In actual production, the support arm can be fixed on the shell by the existing fixing element. The end surface of the connecting end of the support arm is arranged as an arc surface matched with the shell.

[0011] In the drain core, the two sides of the support arm are arc surfaces, the end surface of the outer end of the support arm is an arch surface smoothly connected with the two sides of the support arm, the bottom of the support arm is provided with a water blocking cap with an outer wall flush with the end surface of the outer end, and the guide element is inserted into the water blocking cap. By arranging the structure of the side of the support arm, the dirt mixed in the water flow in the process of falling from the periphery of the support arm is prevented from being accumulated on the side of the support arm, the flow of the water flow is guided and dispersed, the falling water flow is prevented from flowing towards the inside of the shell and the impact on the sealing element is reduced as much as possible, the guide element is inserted into the water blocking cap, the water blocking cap protects the guide element, the dirt in the water flow in the falling process is prevented from being accumulated on the guide element, and the stability of the return of the drain is improved.

[0012] The upper surfaces of the support arms are arranged as planes gradually downwardly inclined from the connecting end to the outer end, the support arms at different positions guide the water flow, the dirt in the water flow is prevented from being accumulated on the upper surfaces of the support arms, and the edges of the flow guide surfaces are rounded, so as to facilitate the dispersion and discharge of the water flow from the periphery of the support arm in the process of flowing along the length direction of the support arm, further prevent the dirt in the water flow from being accumulated in the shell, interfere with the circulation of the subsequent water flow and the movement of the sealing element, and improve the stability of the return of the drain.

[0013] In the drain core, the guide is in a columnar shape, the upper end of the guide is axially fixed to the bottom of the outer end of the support arm, the blocking member has a receiving cavity, the guide is at least partially arranged in the receiving cavity, and the lower end of the guide is provided with an annular stopper for limiting the guide from being taken out of the receiving cavity. The reset assembly includes a first magnetic member arranged on the blocking member and a second magnetic member arranged on the guide. The first magnetic member and the second magnetic member interact to make the blocking member have a magnetic force for moving upward. The guide is fixed to the bottom of the support arm, so that the support arm protects the guide from the water flow at the water inlet. The upper end of the guide is axially fixed to the outer end of the support arm, and the guide is arranged in the receiving cavity, so that the guide supports the blocking member at the center of the housing, avoids the water flow into the receiving cavity, and ensures the magnetism of the first magnetic member and the second magnetic member, so as to ensure that the blocking member has a tendency to move upward to block the water outlet under the magnetic action.

[0014] In the drain core, the inner wall of the housing has a converging flow channel with a gradually reduced inner diameter from the water inlet to the water outlet, and the support arm is located above the converging flow channel. The support arm is arranged above the converging flow channel, and the converging flow channel has a converging structure. When the drain core drains water, the water flow is guided by the upper surface of the support arm, and the water potential is formed by the impact of the converging flow channel, which helps to scatter the dirt in the water flow. Then, the water flow is accelerated and guided through the converging flow channel with a gradually reduced inner diameter from the water inlet to the water outlet, which avoids the dirt from being retained at the bottom of the support arm and interfering with the movement of the blocking member, thereby improving the stability of the drain core.

[0015] In the drain core, the housing includes a main body sleeve, a connecting sleeve and a guide sleeve arranged in sequence from top to bottom. The inner side of the main body sleeve has the support arm. The guide sleeve and the connecting sleeve are in communication, and the two form the converging flow channel. The outlet of the converging flow channel is the water outlet. The housing has a layered structure through the connecting sleeve, the main body sleeve and the guide sleeve. The internal structure of the housing is stepped and gradually reduced from the water inlet to the water outlet through the connection and communication relationship of the three-layer structure. The support arm arranged in the first layer guides the water flow, and the structure of the second layer and / or the third layer cooperates to make the water flow collide with each other, scatter the dirt in the water flow, and accelerate the flow rate, thereby improving the drainage efficiency, avoiding the retention of dirt, and ensuring the stability of the drain core.

[0016] In the drain core, the adapter sleeve has an extension section connected to the inner side of the main sleeve, a support section sleeved on the outer side of the guide sleeve, and a limiting section connecting the support section and the extension section, the inner wall of the extension section is a first tapered surface that is tapered in the axial direction of the guide member towards the water outlet, the inner side of the guide sleeve has a second tapered surface and a third tapered surface that are tapered in the axial direction of the guide member towards the water outlet, the third tapered surface is below the second tapered surface, and the taper of the third tapered surface is greater than the taper of the second tapered surface. The limiting section determines the positions of the main sleeve and the guide sleeve relative to the adapter sleeve, i.e., the position of the support arm relative to the converging flow channel. When draining, the water flow is accelerated under the guidance of the first tapered surface and hits the annular flange, so that the water flows collide with each other and the dirt in the water flow is dispersed, and then the water flow is further accelerated under the guidance of the second tapered surface and the third tapered surface, thereby improving the drainage efficiency and avoiding the retention of dirt, and ensuring the stability of the drain return.

[0017] In the drain core, the outer side of the guide sleeve is provided with a clamping groove, and the drain core further comprises a second sealing ring clamped with the clamping groove and abutting against the bottom surface of the guide sleeve, the sealing member abuts against the second sealing ring to block the water outlet, the adapter sleeve is sleeved outside the second sealing ring, and the inner diameter of the adapter sleeve at the corresponding position is smaller than the outer diameter of the second sealing ring. By sleeving the adapter sleeve outside the guide sleeve, the clamping groove is formed on the outer side of the guide sleeve, the installation position of the second sealing ring is limited, and the second sealing ring is pressed against the sealing member by the guide sleeve. The aforementioned corresponding position refers to the inner diameter size of the adapter sleeve sleeved outside the second sealing ring.

[0018] Compared with the prior art, the drain core provided by the application has the following advantages:

[0019] 1. A support arm with an upper surface gradually inclined downward from the connection end to the outer end is arranged at the water inlet, and a guide member is axially fixed at the bottom of the support arm to support the sealing member, so that the support arm guides the water flow and protects the guide member. This support method avoids the formation of a hanging point between the guide member and the support member, prevents the dirt in the water flow from being retained on the guide member, and interferes with the movement of the sealing member, thereby improving the stability of the drain return.

[0020] 2. A converging flow channel is arranged on the inner wall of the housing, and the converging flow channel is arranged below the support arm to assist the support arm in guiding the water flow falling around the support arm, so that the water flow collides with each other, the dirt in the water flow is dispersed in the process of collision and impact, and is quickly discharged with the water flow, thereby ensuring the stability of the drain return while improving the drainage efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of the drain core embodiment one.

[0022] Figure 2 is a partial structural sectional view of the shell.

[0023] Figure 3 is an exploded view of the shell.

[0024] Figure 4 is a schematic diagram of the overall structure of the local drain core.

[0025] Figure 5 is a schematic diagram of the application structure of the drain core of example one.

[0026] Figure 6 is an exploded view of Figure 5 .

[0027] Figure 7 is a sectional view of Figure 5 .

[0028] Figure 8 is a sectional view of the local drain core of example two.

[0029] Figure 9 is a sectional view of the local drain core of example three.

[0030] Figure 10 is a sectional view of the local drain core of example four.

[0031] In the drawings, 1 is a shell; 11 is a water inlet; 12 is a water outlet; 13 is a support arm; 131 is a guide plate; 132 is a protective rib; 133 is a connecting end; 134 is an outer end; 135 is a guide surface; 14 is a water blocking cap; 15 is a converging flow passage; 16 is a connecting sleeve; 161 is an extension section; 1611 is a first taper surface; 162 is a support section; 163 is a limiting section; 1631 is a cylindrical surface; 17 is a main body sleeve; 18 is a guide sleeve; 181 is a second taper surface; 182 is a third taper surface; 183 is a clamping groove; 184 is an annular flange; 19 is a limiting part; 2 is a blocking piece; 21 is a containing cavity; 22 is a through hole; 23 is a support part; 24 is a flow blocking part; 241 is a through hole; 3 is a guide piece; 31 is an annular blocking edge; 4 is a reset assembly; 41 is a first magnetic piece; 42 is a second magnetic piece; 43 is a third magnetic piece; 5 is a ventilation flow passage; 51 is a clearance gap; 52 is a ventilation hole; 53 is an air cavity; 6 is a first sealing ring; 7 is a second sealing ring; 8 is a limiting piece; 9 is a protective cover; 10 is a floor drain seat; 101 is a floor drain cover; 102 is a filter screen; 103 is a third sealing ring; 104 is a convex edge. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0033] Example one

[0034] As shown in Figure 1 and Figure 4 , the local leakage core includes a shell 1 with a water inlet 11 and a water outlet 12, and a blocking piece 2 blocking the water outlet 12. As shown in Figure 2 , the shell 1 is cylindrical, and the inner wall of the shell 1 is inwardly convex at the water inlet 11 to form a long strip-shaped support arm 13, the length of the support arm 13 is not less than 1 / 3 of the inner diameter of the shell 1, the support arm 13 has a fan-shaped connecting end 133 and a semicircular outer end 134 extending to the center position of the shell 1, the arc length of the connecting end 133 is greater than the radius of the outer end 134, both sides of the support arm 13 are circular arc surfaces, the end face of the outer end 134 of the support arm 13 is an arch-shaped surface smoothly transitioning with both sides of the support arm 13, the bottom of the support arm 13 is provided with a water blocking cap 14 with an outer wall flush with the end face of the outer end 134, both sides of the support arm 13 gradually shrink inward from the connecting end 133 to the outer end 134, the arc length of the connecting end 133 accounts for less than 1 / 2 of the circumference of the inner circle of the shell 1, and the connection between the connecting end 133 and the shell 1 is smoothly transitioned. The fan-shaped connecting end ensures the connection area of the support arm and the inner wall of the shell, ensures the structural stability of the support arm, and through the differential size setting of the connecting end and the outer end, not only minimizes the obstruction of the support arm to the water inlet, but also guides the water flow to fall around the support arm during flowing along the support arm. In the embodiment, the support arm 13 is integrally connected with the inner side of the shell 1, the upper surface of the support arm 13 is a flow guide surface 135 gradually downwardly inclined from the connecting end 133 to the outer end 134, the downward inclination angle of the flow guide surface 135 is 20°-30°, the edge of the flow guide surface 135 is provided with a rounded corner, in actual production, the connecting end 133 of the support arm 13 can be fixed to the inner side of the shell 1 by screws or other fasteners, the upper surface of the support arm 13 has a flow guide surface 135 gradually downwardly inclined from the connecting end 133 to the outer end 134, the downward inclination angle of the flow guide surface 135 can be 30°-40°, the flow guide surface 135 is fan-shaped and flat, the width of the flow guide surface 135 gradually decreases from the connecting end 133 to the outer end 134 of the support arm 13, and the flow guide surface 135 and the side of the support arm 13 have a rounded corner.

[0035] As shown in Figure 1 and Figure 2As shown, the support arm 13 comprises a guide plate 131 extending from the inner wall of the shell 1 to the middle part of the shell 1, the upper surface of the guide plate 131 is a guide surface 135, the bottom of the support arm 13 is axially fixed with a guide piece 3, the guide piece 3 is columnar, and the upper end of the guide piece 3 is threadedly connected to the bottom of the guide plate 131. The blocking piece 2 has a containing cavity 21, the top of the blocking piece 2 is provided with a through hole 22 communicating with the containing cavity 21, the blocking piece 2 has a support part 23 penetrating into the water retaining cap 14 and a flow blocking part 24 blocking the water outlet 12, the flow blocking part 24 is egg-shaped and the inner cavity is the above-mentioned containing cavity 21, the through hole 22 extends from the support part 23 to the flow blocking part 24, the guide piece 3 penetrates into the through hole 22, and the lower end of the guide piece 3 is provided with an annular stop flange 31 with an outer diameter larger than the hole diameter of the through hole 22, the blocking piece 2 can move along the axial direction of the guide piece 3, and the annular stop flange 31 limits the lower limit position of the blocking piece 2.

[0036] As shown in Figure 1 and Figure 2 As shown, the bottom of the support arm 13 is provided with a water retaining cap 14 shielding the hole of the through hole 22, the water retaining cap 14 and the support part 23 have an air flow passage 5 for gas flow, the bottom of the flow blocking part 24 is provided with a through hole 241 communicating with the containing cavity 21, the inner wall of the water retaining cap 14 is provided with an air hole 52, the support part 23 is columnar, and the outer diameter of the support part 23 is smaller than the inner diameter of the water retaining cap 14 so that an air cavity 53 is formed between the support part 23 and the water retaining cap 14, the air hole 52 communicates with the air flow passage 5 through the air cavity 53 and the allowance gap 51. The guide piece 3 is sleeved with a first sealing ring 6, the containing cavity 21 is provided with a protective cover 9 threadedly connected with the blocking piece 2, the protective cover 9 abuts against the first sealing ring 6 through a limiting piece 8, the support part 23 abuts against the first sealing ring 6, the water retaining cap 14 and the flow blocking part 24 have the allowance gap 51, and the outer diameter of the first sealing ring 6 is smaller than the inner diameter of the water retaining cap 14. The second sealing ring 7 is fixed at the water outlet 12 of the shell 1, and in the initial state, the blocking piece 2 abuts against the second sealing ring 7 to block the water outlet 12. The support arm 13 further comprises a protective rib 132 connecting the water retaining cap 14 and the inner wall of the shell 1, the air hole 52 is linear and located at the connection between the protective rib 132 and the water retaining cap 14.

[0037] As shown in Figure 2 and Figure 3As shown, the shell 1 comprises a connecting sleeve 16, a main sleeve 17 sleeved outside the connecting sleeve 16, and a guide sleeve 18 embedded in the connecting sleeve 16. The inner side of the main sleeve 17 is provided with the support arm 13, the guide sleeve 18 is located below the support arm 13, the main sleeve 17 is in communication with the connecting sleeve 16, the guide sleeve 18 is in communication with the guide sleeve 18 and forms a converging flow passage 15 with a gradually decreasing inner diameter from the water inlet 11 to the water outlet 12. The outlet of the converging flow passage 15 is the water outlet 12. In this embodiment, the converging flow passage 15 is in the shape of a converging mouth. In actual production, the converging flow passage 15 can be in the shape of a diverging mouth or a straight mouth. The connecting sleeve 16 has an extension segment 161 threadedly connected to the inner side of the main sleeve 17, a support segment 162 threadedly connected to the outer side of the guide sleeve 18, and a limiting segment 163 connecting the support segment 162 and the extension segment 161. The bottom of the main sleeve 17 abuts against the limiting segment 163. The top of the guide sleeve 18 is provided with an annular flange 184 abutting against the support segment 162. The inner wall of the extension segment 161 is a first tapered surface 1611 converging in the axial direction of the guide member 3 towards the water outlet 12. The inner wall of the limiting segment 163 is a cylindrical surface 1631 connected to the first tapered surface 1611. The cylindrical surface 1631 abuts against the outer side of the annular flange 184. The inner side of the guide sleeve 18 is provided with a second tapered surface 181 and a third tapered surface 182 converging in the axial direction of the guide member 3 towards the water outlet 12. The top surface of the annular flange 184 is smoothly connected to the second tapered surface 181. The third tapered surface 182 is located below the second tapered surface 181 and has a larger taper than the second tapered surface 181.

[0038] The outer side of the guide sleeve 18 is provided with a clamping groove 183. The floor drain core further comprises a second sealing ring 7 clamped in the clamping groove 183 and abutting against the bottom surface of the guide sleeve 18. The sealing member 2 abuts against the second sealing ring 7 to block the water outlet 12. The connecting sleeve 16 is sleeved outside the second sealing ring 7 to make the second sealing ring 7 always have a tendency to press the sealing member 2. The guide member 3 and the sealing member 2 are provided with a reset assembly 4 making the sealing member 2 always have a tendency to move upwards. In this embodiment, the reset assembly 4 is a magnetic assembly. The reset assembly 4 comprises a first magnetic member 41 fixed to the sealing member 2 and a second magnetic member 42 and a third magnetic member 43 fixed to the guide member 3. The first magnetic member 41 is annular and located in the accommodating cavity 21. The guide member 3 is arranged in the first magnetic member 41. The second magnetic member 42 is located on the upper side of the first magnetic member 41 and the magnetic properties of the two are attractive. The third magnetic member 43 is located on the lower side of the first magnetic member 41 and the magnetic properties of the two are repulsive. In actual application, the reset assembly 4 can be a spring assembly. In the accommodating cavity 21, a first spring and a second spring connecting the guide member 3 and the sealing member 2 are arranged.

[0039] As Figures 5-7As shown, the present invention includes a drain base 10, a drain cover 101, and a filter screen 102. A third sealing ring 103 is provided on the outer sleeve of the housing 1. Two symmetrically arranged limiting parts 19 are provided on the outer wall of the housing 1. A circumferentially arranged protruding edge 104 is provided on the inner wall of the drain base. The bottom of the protruding edge 104 abuts against the limiting part 19, and the top of the limiting part 19 abuts against the third sealing ring 103 so that the drain core of this application is installed in the drain base 10.

[0040] Example 2

[0041] This embodiment is basically the same as the first embodiment in terms of structure and principle. The difference is that in this embodiment, the guide 3 is cylindrical, and the sealing member 2 includes a rod that is slidably connected in the guide 3 and a blocking part that blocks the water outlet in an umbrella shape. The bottom end of the rod is connected to the blocking part, and the top end of the rod is fixed with a first magnetic member 41. A second magnetic member 42 located below the first magnetic member 41 is fixed in the guide 3. The magnetism of the second magnetic member 41 is repulsive to the magnetism of the first magnetic member 42.

[0042] Example 3

[0043] like Figure 8 As shown, this embodiment is basically the same as the first embodiment in terms of structure and principle. The difference is that in this embodiment, the reset component 4 includes a first magnetic component 41 fixed to the sealing component 2 and a second magnetic component 42 fixed to the guide component 3. The first magnetic component 41 is annular and located in the receiving cavity 21. The guide component 3 passes through the first magnetic component 41. The second magnetic component 42 is columnar and located in the guide component 3. The magnetism at the upper end of the second magnetic component 42 is attracted to the magnetism on the inner side of the first magnetic component 41, and the magnetism at the lower end of the second magnetic component 42 is repelled by the magnetism on the inner side of the first magnetic component 41.

[0044] Example 4

[0045] like Figure 9 As shown, this embodiment is basically the same as the first embodiment in terms of structure and principle. The difference is that in this embodiment, the reset component 4 includes a first magnetic component 41 fixed to the sealing component 2 and a second magnetic component 42 fixed to the guide component 3. The first magnetic component 41 is annular and located in the receiving cavity 21. The guide component 3 passes through the first magnetic component 41. The second magnetic component 42 is annular and fixed to the lower end of the guide component 3. The magnetism on the upper side of the second magnetic component 42 is repulsive to the magnetism on the lower side of the first magnetic component 41.

[0046] Example 5

[0047] like Figure 10As shown, the structure and principle of the embodiment are basically same as those of the first embodiment, but the difference is that, in the embodiment, the reset assembly 4 comprises a first magnetic member 41 fixed on the blocking member 2 and a second magnetic member 42 fixed on the guide member 3, the first magnetic member 41 is annular and located in the accommodating cavity 21, the guide member 3 is arranged in the first magnetic member 41, the second magnetic member 42 is pie-shaped and fixed in the annular flange 31, and the magnetism on the upper side of the second magnetic member 42 repels the magnetism on the lower side of the first magnetic member 41.

[0048] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art to which the present application pertains can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0049] Although the terms such as the shell 1, the water inlet 11, the water outlet 12, the support arm 13, the guide plate 131, the protection rib 132, the connecting end 133, the outer end 134, the guide surface 135, the water-blocking cap 14, the converging flow passage 15, the connecting sleeve 16, the extension section 161, the first taper surface 1611, the support section 162, the limiting section 163, the cylindrical surface 1631, the main sleeve 17, the guide sleeve 18, the second taper surface 181, the third taper surface 182, the clamping groove 183, the annular flange 184, the limiting part 19, the blocking member 2, the accommodating cavity 21, the penetrating hole 22, the support part 23, the flow resistance part 24, the through hole 241, the guide member 3, the annular flange 31, the reset assembly 4, the first magnetic member 41, the second magnetic member 42, the third magnetic member 43, the air passage 5, the clearance 51, the air hole 52, the air cavity 53, the first sealing ring 6, the second sealing ring 7, the limiting member 8, the protection cover 9, the floor drain seat 10, the floor drain cover 101, the filter screen 102, the third sealing ring 103, the flange 104, etc. are used more frequently herein, but the possibility of using other terms is not excluded. These terms are used only for the convenience of describing and explaining the essence of the present application; it is against the spirit of the present application to interpret them as any kind of additional limitation.

Claims

1. A drain core, comprising a housing (1) having an inlet (11) and an outlet (12) and a sealing member (2) for sealing the outlet (12), characterized in that, The housing (1) has a long support arm (13) at the inlet (11). The support arm (13) has a connecting end (133) and an outer end (134) extending to the center of the housing (1). The connecting end (133) of the support arm (13) is fixed to the inside of the housing (1) or integrally connected to the inside of the housing (1). The upper surface of the support arm (13) has a guide surface (135) that gradually slopes downward from the connecting end (133) to the outer end (134). The bottom of the support arm (13) is axially fixed to a guide member (3). The sealing member (2) can move along... The axial movement of the guide (3) is provided with a water-blocking cap (14) at the bottom of the support arm (13). The guide (3) is columnar. The upper end of the guide (3) is axially fixed to the bottom of the outer end (134) of the support arm (13). The sealing member (2) has a receiving cavity (21). The guide (3) is at least partially inserted into the receiving cavity (21). The lower end of the guide (3) is provided with an annular retaining edge (31) that restricts the guide (3) from coming out of the receiving cavity (21). A reset component (4) is provided between the guide (3) and the sealing member (2) to make the sealing member (2) always have an upward movement tendency.

2. A drain core according to claim 1, characterized in that, The guide surface (135) is a flat surface, and the width of the guide surface (135) gradually decreases from the connecting end (133) of the support arm (13) to the outer end (134).

3. A drain core according to claim 2, characterized in that, The guide surface (135) is fan-shaped, and the two sides of the support arm (13) gradually contract from the connecting end (133) to the outer end (134). The guide surface (135) and the side of the support arm (13) have rounded corners.

4. A drain core according to any one of claims 1-3, characterized in that, Both sides of the support arm (13) are arc surfaces. The end face of the outer end (134) of the support arm (13) is an arched surface that smoothly transitions to both sides of the support arm (13). The outer wall of the water-blocking cap (14) is flush with the end face of the outer end (134) of the support arm (13). The guide (3) is inserted into the water-blocking cap (14).

5. A drain core according to any one of claims 1-3, characterized in that, The reset assembly (4) includes a first magnetic element (41) disposed on the sealing element (2) and a second magnetic element (42) disposed on the guide element (3). The first magnetic element (41) and the second magnetic element (42) interact to give the sealing element (2) an upward magnetic force.

6. A drain core according to any one of claims 1-3, characterized in that, The inner wall of the housing (1) has a contraction channel (15) with an inner diameter that gradually decreases from the inlet (11) to the outlet (12), and the support arm (13) is located above the contraction channel (15).

7. A drain core according to claim 6, characterized in that, The housing (1) includes a main body sleeve (17), a connecting sleeve (16) and a guide sleeve (18) sequentially embedded from top to bottom. The inner side of the main body sleeve (17) has the aforementioned support arm (13). The guide sleeve (18) is connected to the connecting sleeve (16) and the two form the aforementioned contraction channel (15). The outlet of the contraction channel (15) is the aforementioned water outlet (12).

8. A drain core according to claim 7, characterized in that, The connecting sleeve (16) has an extension section (161) connected to the inner side of the main sleeve (17), a support section (162) sleeved on the outer side of the guide sleeve (18), and a limiting section (163) connecting the support section (162) and the extension section (161). The inner wall of the extension section (161) is a first conical surface (1611) that is constricted along the axial direction of the guide member (3) toward the outlet (12). The inner side of the guide sleeve (18) has a second conical surface (181) and a third conical surface (182) that are constricted along the axial direction of the guide member (3) toward the outlet (12). The third conical surface (182) is located below the second conical surface (181), and the taper of the third conical surface (182) is greater than the taper of the second conical surface (181).

9. A drain core according to claim 7, characterized in that, The guide sleeve (18) has a snap-fit ​​groove (183) on its outer side. The drain core also includes a second sealing ring (7) that snaps into the snap-fit ​​groove (183) and abuts against the bottom surface of the guide sleeve (18). The sealing member (2) abuts against the second sealing ring (7) to block the outlet (12). The connecting sleeve (16) is fitted outside the second sealing ring (7). The inner diameter of the connecting sleeve (16) at the corresponding position is smaller than the outer diameter of the second sealing ring (7).

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