A kind of air pressure balanced floor drain

Abstract

The invention discloses a pressure-balanced floor drain, and relates to the technical field of floor drains. The technical scheme thereof is as follows: the floor drain comprises a cylinder and a reset device, wherein the upper end of the cylinder is a water inlet, the lower end of the cylinder is a water outlet, the reset device is arranged at the lower end of the cylinder, a sealing cover is arranged between the reset device and the cylinder, the reset device can apply a pre-tightening force to the sealing cover, so that the sealing cover is close to the water outlet and seals the water outlet, a stroke chamber is arranged on the sealing cover, a through hole 1 connected to a sewer pipe is arranged below the stroke chamber, a through hole 2 connected to the outside is arranged above the stroke chamber, a floating member is arranged in the stroke chamber, and the floating member can seal the through hole 1 by its own gravity. The floating member rises under the action of the air pressure difference, so that the air pressure of the lower sealing section is the same as or close to the outside air pressure, so as to ensure that the sealing cover can move up and down normally, and achieve the purpose of relatively smooth discharge of accumulated water at the water inlet.

Description

Technical Field

[0001] The invention relates to the technical field of floor drains, and in particular to a pressure-balanced floor drain. Background Art

[0002] At present, a Chinese patent with the announcement number CN104863246B discloses a magnetic suspension floor drain core. It solves the technical problem that the automatic sealing performance of the floor drain in the prior art is easy to fail. The core includes a core body and a sealing cover, the upper end of the core body is a water inlet, the lower end of the core body is a water outlet, a second magnet is arranged in the sealing cover, a shell with a closed inner cavity is fixed at the lower end of the core body, a first magnet is fixed in the inner cavity of the shell, the first magnet is located below the second magnet, the sealing cover is located between the water outlet and the shell, and the repulsive force between the first magnet and the second magnet causes the sealing cover to be close to the water outlet to seal the water outlet.

[0003] When the core is in use, water on the ground enters the upper end of the core body from the water inlet. When the pressure of the water above the sealing cover is greater than the repulsive force between the first magnet and the second magnet, the sealing cover moves downward, so that the water inlet is connected to the water outlet, and the water above the sealing cover is discharged from the water outlet; when the pressure of the water above the sealing cover is less than the repulsive force between the first magnet and the second magnet, the sealing cover moves upward and fits against the water outlet to seal the water outlet.

[0004] The above technical solution has the following defects: the core needs to be installed in the sewer pipe, and a U-shaped water seal section is generally installed in the sewer pipe, and water will accumulate in the water seal section, thereby ensuring that the gas in the sewer pipe is not easy to rise back to the room; because the accumulated water inside the water seal section will separate the sewer pipe, and the sealing cover separates the water seal section from the outside world, the sewer pipe located between the sealing cover and the water seal section is the sealing section, and the outside air pressure is easily affected by conditions such as altitude and temperature. For example, when the seasons change or it rains, the outside atmospheric pressure decreases, and the atmospheric pressure in the sealing section is not affected in the sealed state, then the atmospheric pressure in the sealing section is higher than the outside atmospheric pressure. Under the action of the air pressure difference, the air in the sealing section will exert a supporting force on the sealing cover pointing to the side of the water inlet, making it difficult for the sealing cover to move downward, resulting in the difficulty in discharging the accumulated water in the water inlet. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide an air pressure balanced floor drain, which has the advantage of smoother discharge of accumulated water at the water inlet.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a pneumatic balanced floor drain, comprising a cylinder and a reset device, the upper end of the cylinder is a water inlet, the lower end of the cylinder is a water outlet, the reset device is arranged at the lower end of the cylinder, a sealing cover is arranged between the reset device and the cylinder, the reset device can apply a pre-tightening force to the sealing cover, so that the sealing cover is close to the water outlet and seals the water outlet, a placement cavity is opened on the sealing cover, the upper end of the placement cavity is detachably connected with a mounting cap, the mounting cap has an inner cavity, the inner cavity is connected with the placement cavity and is combined to form a stroke cavity, a through hole 1 connected to the sewer pipe is arranged below the stroke cavity, a through hole 2 connected to the outside is arranged at the upper end of the mounting cap, a floating member is movably arranged in the stroke cavity, the movable stroke of the floating member is limited by the stroke cavity, and the floating member can seal the through hole 1 by its own gravity.

[0007] Through the above technical scheme, under normal circumstances, the local drain is installed at the outlet of the sewer pipe, and the surface water enters the upper part of the sealing cover through the water inlet. The accumulated water acts on the sealing cover, causing the sealing cover to move downward, the water outlet to open, and the accumulated water to be discharged from the opened water outlet; after the accumulated water is discharged, the resetting device at the lower end of the cylinder applies a force to the sealing cover in the direction of the water outlet, so that the upper end surface of the sealing cover is close to the water outlet, thereby sealing the water outlet; when the local drain does not drain water, the gas in the sewer pipe is not easy to rise back to the room, thereby achieving odor prevention. Under abnormal circumstances, such as when the external air pressure decreases due to seasonal changes or rainy days, the air pressure of the sealing section is higher than the external air pressure, and the force of the air pressure difference is greater than the gravity of the floating part itself. Under the action of the air pressure difference, the floating part rises, so that through hole one is connected with through hole two, that is, the sealing section is connected with the outside world, so that the air pressure of the sealing section is the same or similar to the external air pressure, thereby ensuring that the sealing cover can move up and down normally; after the air pressure of the sealing section is balanced with the external air pressure, the force of the air pressure difference is less than the gravity of the floating part itself, and the floating part resets under the action of its own gravity and seals through hole one, thereby achieving the purpose of relatively smooth discharge of accumulated water at the water inlet. Among them, the mounting cap is detachably connected to the upper end of the placement cavity, and the travel cavity is formed by combining the inner cavity and the placement cavity, which is convenient for loading and unloading the floating part.

[0008] Preferably, the floating member comprises a float ball.

[0009] Through the above technical solution, the floating member is a floating ball, and even after the floating ball turns over or rolls in the stroke cavity, the floating ball can still seal the through hole by its own gravity.

[0010] Preferably, the diameter of the second through hole is smaller than the diameter of the float.

[0011] Through the above technical solution, the diameter of the second through hole is smaller than the diameter of the float, thereby ensuring that the float will not escape from the stroke cavity in the second through hole.

[0012] Preferably, an annular shoulder is provided on the inner wall of the placement cavity, the radius of the annular shoulder is smaller than the radius of the float, the float is located above the annular shoulder, and the outer wall of the float is tightly against the inner circle of the annular shoulder.

[0013] Through the above technical solution, the radius of the annular shoulder is smaller than the radius of the float, so that the float will not fall from the annular shoulder, and the outer wall of the float is in contact with the inner circle of the annular shoulder, so that the float separates the stroke cavity from the space below the annular shoulder.

[0014] Preferably, a connecting portion is provided at the lower end of the annular shoulder, and the through hole 1 is located on the connecting portion.

[0015] Through the above technical solution, the through hole one is located below the annular shoulder, and the outer wall of the float ball abuts against the inner ring of the annular shoulder, so that the float ball seals the through hole one.

[0016] Preferably, a support block is provided at the upper end of the connecting portion, and the upper end surface of the support block can contact the bottom end of the float.

[0017] Through the above technical solution, the setting of the support block further ensures that the float will not fall from the placement cavity.

[0018] Preferably, a guide rod is provided below the connecting part, and an upper magnetic block is provided at the upper end of the guide rod; the reset device includes an air-replenishing core and a fixing sleeve, a central hole for sliding connection of the guide rod is provided on the air-replenishing core, a plurality of placement grooves evenly distributed circumferentially are provided at the lower end of the air-replenishing core, and magnetic blocks 1 are provided in a one-to-one correspondence in the plurality of placement grooves, the fixing sleeve is fixed to the lower end of the air-replenishing core so as to seal the plurality of magnetic blocks in the placement grooves, and the magnetic force between magnetic block 1 and the upper magnetic block is a repulsive force.

[0019] Through the above technical solution, an upper magnetic block is arranged at the upper end of the guide rod, and the guide rod is slidably connected in the center hole, and the magnetic block is sealed at the lower end of the air replenishing core through a fixed sleeve. The repulsive force generated by the plurality of magnetic blocks and the upper magnetic block pushes the guide rod and the sealing cover to move upward as a whole, so that the upper end surface of the sealing cover seals the water outlet.

[0020] Preferably, a lower magnetic block is provided at the lower end of the guide rod, the magnetic force between the lower magnetic block and the upper magnetic block is suction, a separation tube is provided between the lower magnetic block and the upper magnetic block, and the magnetic force between the lower magnetic block and the first magnetic block is suction.

[0021] Through the above technical solution, a lower magnetic block is set at the lower end of the guide rod, and the suction force generated by the plurality of magnetic blocks and the lower magnetic block pushes the guide rod and the sealing cover to move upward as a whole, further ensuring the sealing effect between the sealing cover and the water outlet. At the same time, the magnetic force between the lower magnetic block and the upper magnetic block is suction force, and a separation tube is set between the lower magnetic block and the upper magnetic block to ensure that the spacing between the lower magnetic block and the upper magnetic block is fixed, so that the guide rod can slide normally in the center hole.

[0022] Preferably, a support seat is provided at the lower end of the cylinder, the support seat has a cavity for the guide rod to slide, the upper end of the support seat is detachably connected to a shell, the air replenishing core is detachably connected to the shell, and the inner wall of the center hole is provided with a plurality of airways connected to the cavity.

[0023] Through the above technical scheme, the air replenishing core is detachably connected to the shell, and the shell is further connected to the support seat at the lower end of the cylinder. The support seat has a cavity for the guide rod to slide, and an air channel opened on the inner wall of the center hole connects the cavity with the sewer pipe, so that the atmospheric pressure in the cavity is equal to the atmospheric pressure in the sewer pipe, avoiding the guide rod from being affected by the air pressure in the cavity during the sliding process in the center hole, and ensuring that the guide rod can slide normally in the center hole.

[0024] Preferably, a center column is provided in the air replenishing core, the center hole is opened on the center column and is coaxially arranged with the center column, the upper end of the center column protrudes from the upper end of the shell, and the upper end of the center column can be abutted against the lower end surface of the sealing cover, and an air duct two connected to the cavity is opened on the outer side of the center column, and the upper end of the air duct two is lower than the upper end of the air duct one.

[0025] Through the above technical solution, the center hole is coaxially arranged with the center column, and the upper end of the center column protrudes from the upper end of the shell, which increases the length of the center hole, so that the concentricity of the guide rod sliding with the center hole is high, ensuring that the sealing cover can be accurately reset to seal the water outlet. The accumulated water enters the top of the sealing cover from the water inlet and acts on the sealing cover, so that the sealing cover moves down and opens the water outlet. The sealing cover moves down and stops after the lower end face of the sealing cover is close to the upper end of the center column. In this process, the airway 1 may be covered by the lower end face of the sealing cover. Therefore, the airway 2 connecting the cavity and the sewer is provided outside the outer wall of the center column, thereby ensuring that the atmospheric pressure in the cavity is equal to the atmospheric pressure in the sewer pipe, and further ensuring that the guide rod can slide normally in the center hole.

[0026] Preferably, a through hole three connected to a sewer pipe is provided at the lower end of the cavity.

[0027] Through the above technical solution, the through hole three opened at the lower end of the cavity and connected to the sewer pipe further ensures that the atmospheric pressure in the cavity is equal to the atmospheric pressure in the sewer pipe, so that the guide rod can slide normally in the center hole. At the same time, after the accumulated water entering the stroke cavity is discharged from the through hole one, part of the accumulated water enters the cavity through the outer wall of the guide rod and the airway one, and the accumulated water in the cavity can be discharged from the through hole three to the sewer.

[0028] Preferably, a pressure cap is provided at the water outlet, a sealing ring is connected to the lower end of the pressure cap, and a movable flap is integrally formed at the lower end of the sealing ring, and the inner side wall of the movable flap can abut against the upper end surface of the sealing cover to seal the water outlet.

[0029] Through the above technical solution, after the upper end surface of the sealing cover is abutted against the inner side surface of the movable flap, the sealing cover and the guide rod continue to move upward under the repulsive force between the magnetic block 1 and the upper magnetic block, so that the upper end surface of the sealing cover is pressed against the inner side surface of the movable flap, and the inner side surface of the movable flap is bent upward, and the inner side surface of the movable flap is completely pressed against the upper end surface of the sealing cover. At the same time, the float seals the through hole 1, thereby ensuring the sealing of the local leakage.

[0030] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0031] 1. The arrangement of the stroke chamber, through hole 1, through hole 2 and the floating member ensures that when the outside atmospheric pressure decreases, the atmospheric pressure below the lower end of the sealing cover changes accordingly, ensuring that the sealing cover is in a state where it can move normally, thereby ensuring normal drainage of the local drain;

[0032] 2. The arrangement of the air replenishing core, air channel 1, air channel 2 and through hole 3 balances the atmospheric pressure in the cavity with the atmospheric pressure in the sewer, ensuring that the guide rod can slide normally in the center hole;

[0033] 3. The arrangement of the first, upper and lower magnetic blocks enables the guide rod to exert a vertical upward supporting force on the sealing cover to ensure that the sealing cover can seal the water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the external structure of the embodiment;

[0035] Figure 2 It is a full cross-sectional schematic diagram of an embodiment (the water outlet is in an open state);

[0036] Figure 3 It is a full cross-sectional schematic diagram of an embodiment (the water outlet is in a sealed state);

[0037] Figure 4 It is a schematic diagram of the structure of the sealing cover, the floating ball and the mounting cap in the embodiment;

[0038] Figure 5 A full cross-sectional schematic diagram of the guide rod and the sealing cover in the embodiment;

[0039] Figure 6 This is a schematic diagram of the exploded structure of the reset device in the embodiment;

[0040] Figure 7 is a full cross-sectional schematic diagram of the reset device in the embodiment;

[0041] Figure 8 It is a cross-sectional schematic diagram of the pressure cap, the sealing ring and the movable valve in the embodiment.

[0042] Reference numerals: 100, cylinder; 110, water inlet; 120, water outlet; 121, pressure cap; 122, sealing ring; 1221, movable flap; 130, support seat; 131, cavity; 1311, through hole three; 132, shell; 140, connecting block; 200, reset device; 210, air replenishing core; 211, center hole; 2111, airway one; 212, placement groove; 213, magnetic block one; 220, fixing sleeve; 230, center column; 2301, Airway 2; 300, sealing cover; 310, stroke chamber; 311, through hole 1; 312, through hole 2; 320, placement chamber; 321, mounting cap; 3211, inner chamber; 322, annular shoulder; 323, connecting part; 3231, support block; 330, guide rod; 331, mounting groove; 3311, upper magnetic block; 3312, separation tube; 3313, lower magnetic block; 3314, rubber plug; 340, guide rib; 400, floating part; 410, float. DETAILED DESCRIPTION

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the outside refers to the space at the outer end of the water inlet 120.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0045] A pressure-balanced floor drain, such as Figures 1 to 5As shown, the floor drain includes a cylinder 100 and a reset device 200, the upper end of the cylinder 100 is a water inlet 110, the lower end of the cylinder 100 is a water outlet 120, the reset device 200 is arranged at the lower end of the cylinder 100, a sealing cover 300 is arranged between the reset device 200 and the cylinder 100, the cross section of the upper surface of the sealing cover 300 is arc-shaped, and the upper end surface of the sealing cover 300 is integrally formed with a plurality of guide ribs 340 for guiding the flow direction of the accumulated water, and the reset device 200 can apply a pre-tightening force to the sealing cover 300, so that the sealing cover 300 is close to the water outlet 120. The water outlet 120 is sealed, and a stroke chamber 310 is provided on the sealing cover 300. A through hole 1 311 connected to the sewer pipe is provided below the stroke chamber 310, and a through hole 2 312 connected to the outside is provided above the stroke chamber 310. A floating member 400 is provided in the stroke chamber 310, and the floating member 400 can seal the through hole 1 311 by its own gravity. Preferably, the density of the floating member 400 is less than the density of water. The floating member 400 can also be other floating objects that can float on the water surface and can fall back in the stroke chamber 310 and seal the through hole 1 311. As another solution, the density of the floating member 400 can be greater than or equal to the density of water, and it does not affect the upward movement of the floating member 400.

[0046] The floating member 400 is preferably a float 410. As another solution, the cross-sectional shape of the floating member 400 can also be square, and the cross-sectional shape of the stroke chamber 310 can be matched thereto, so that the floating member 400 can slide in the stroke chamber 310 and seal the through hole 1 311 after returning.

[0047] A placement cavity 320 is provided on the sealing cover 300. Preferably, the diameter of the placement cavity 320 is larger than the diameter of the float 410, and the diameter of the placement cavity 320 is between 1.2 times and 2 times the diameter of the float 410. Those skilled in the art may also make corresponding changes to the size and shape according to actual needs, which are all within the protection scope of the present application. As another solution, the lower end of the placement cavity 320 may also be provided with an inclined surface that can guide the float 410, and it is only necessary to ensure that the float 410 can fall back by its own gravity and seal the through hole 1 311.

[0048] like Figure 3 As shown, the upper end of the placement cavity 320 is detachably connected with a mounting cap 321 by means of threads or clamping, etc. The mounting cap 321 has an inner cavity 3211, which is connected with the placement cavity 320 and combined to form the travel cavity 310. The second through hole 312 is opened at the upper end of the mounting cap 321, and the diameter of the second through hole 312 is smaller than the diameter of the float 410. The inner wall of the placement cavity 320 is integrally formed with an annular shoulder 322, the radius of which is smaller than the radius of the float 410, and the float 410 is located above the annular shoulder 322, and the outer wall of the float 410 is tightly pressed against the inner circle of the annular shoulder 322.

[0049] like Figure 4 As shown, a connecting portion 323 is provided at the lower end of the annular shoulder 322, and a supporting block 3231 is provided at the upper end of the connecting portion 323. The upper end surface of the supporting block 3231 can contact the bottom end surface of the float 410, and a through hole 311 is located on the connecting portion 323. Preferably, a plurality of through holes 311 are provided, and the through holes 311 are circumferentially spaced and distributed at the upper end of the connecting portion 323.

[0050] A guide rod 330 is provided below the connecting portion 323. Preferably, the guide rod 330 is integrally formed with the connecting portion 323. The guide rod 330 can also be connected to the connecting portion 323 in a detachable manner such as a thread. An upper magnetic block 3311 is provided at the upper end of the guide rod 330. Preferably, a mounting groove 331 is coaxially provided in the guide rod 330, and the bottom of the mounting groove 331 contacts the upper end surface of the upper magnetic block 3311. The separation tube 3312 and the lower magnetic block 3313, the upper end surface of the separation tube 3312 is tightly pressed against the lower end surface of the upper magnetic block 3311, the lower end surface of the separation tube 3312 is tightly pressed against the upper end surface of the lower magnetic block 3313, and the magnetic force between the lower magnetic block 3313 and the upper magnetic block 3311 is an attractive force, and the installation groove 331 is provided with a rubber plug 3314 to seal the upper magnetic block 3311, the separation tube 3312 and the lower magnetic block 3313 in the installation groove 331.

[0051] like Figure 6 , Figure 7 As shown, the reset device 200 includes an air-replenishing core 210 and a fixed sleeve 220. The air-replenishing core 210 is provided with a central hole 211 for sliding connection of the guide rod 330. The lower end of the air-replenishing core 210 is provided with a plurality of placement grooves 212 evenly distributed in the circumferential direction. A plurality of magnetic blocks 213 are arranged in a one-to-one correspondence in the placement grooves 212. The N poles or S poles of the plurality of magnetic blocks 213 are all facing the central axis direction of the central hole 211, and the magnetic force between the magnetic block 213 and the upper magnetic block 3311 is a repulsive force, and the magnetic force between the magnetic block 213 and the lower magnetic block 3313 is an attractive force. The fixed sleeve 220 is sleeved or clamped on the lower end of the air-replenishing core 210, so as to seal the plurality of magnetic blocks 213 in the placement grooves 212.

[0052] The lower end of the cylinder 100 is connected to the support seat 130 through a thread or a connecting block 140. The support seat 130 has a cavity 131 for the guide rod 330 to slide. The lower end of the cavity 131 is provided with a through hole 1311 connected to the sewer pipe. The upper end of the support seat 130 is detachably connected to the shell 132 by thread or snap-on. The air replenishing core 210 is detachably connected to the shell 132 by thread or snap-on. The inner wall of the center hole 211 is provided with a plurality of air channels 2111 connected to the cavity 131.

[0053] A central column 230 is provided in the air replenishing core 210, and a central hole 211 is opened on the central column 230 and is coaxially arranged with the central column 230. The upper end of the central column 230 protrudes from the upper end of the shell 132, and the upper end of the central column 230 can be abutted against the lower end surface of the sealing cover 300. A plurality of air ducts 2301 connected to the cavity 131 are opened on the outer side of the central column 230, and the upper end of the air duct 2301 is lower than the upper end of the air duct 1 2111.

[0054] like Figure 1 , Figure 8 As shown, a pressure cap 121 is threadedly connected to the water outlet 120, and the lower end of the pressure cap 121 is connected to a sealing ring 122 by snapping, and the lower end of the sealing ring 122 is integrally formed with a movable flap 1221 opening outward, and the inner side wall of the movable flap 1221 can be abutted against the upper end surface of the sealing cover 300 to seal the water outlet 120.

[0055] The working principle of a pressure-balanced floor drain:

[0056] The assembly of the air pressure balance floor drain is as follows: the S poles of the plurality of magnetic blocks 213 are all oriented toward the center hole 211, and the fixing sleeve 220 is clamped on the lower end of the air replenishing core 210, so that the magnetic block 213 is sealed in the placement groove 212, and the air replenishing core 210 is assembled; the air replenishing core 210 is coaxially connected to the shell 132; the upper magnetic block 3311, the separation tube 3312 and the lower magnetic block 3313 are sequentially installed in the installation groove 331, and the N poles of the upper magnetic block 3311 and the lower magnetic block 3313 are all oriented toward the sealing cover 300, the notch of the installation groove 331 is sealed by the rubber plug 3314, the float 410 is installed in the placement cavity 320, and the installation cap 321 is threadedly connected to the placement cavity 320, the sealing cover 300 is assembled; the lower end of the pressure cap 121 is clamped with the sealing ring 122, and the outer wall of the pressure cap 121 is threadedly connected to the inner side of the water outlet 120, so that the movable flap 1221 on the sealing ring 122 faces downward; the lower end of the guide rod 330 is extended into the center hole 211, and then the shell 132 is threadedly connected to the upper end of the support seat 130, the repulsive force between the magnetic block 213 and the upper magnetic block 3311, and the suction force between the magnetic block 213 and the lower magnetic block 3313 reset the sealing cover 300, so that the upper end surface of the sealing cover 300 is in contact with the inner side wall of the movable flap 1221 to seal the water outlet 120, and the assembly of the air pressure balance type floor drain is completed.

[0057] Under normal circumstances, the local drain is installed at the outlet of the sewer pipe, and the surface water enters the sealing cover 300 through the water inlet 110, and the accumulated water acts on the sealing cover 300, so that the sealing cover 300 moves downward and opens the water outlet 120, and the accumulated water is discharged into the sewer pipe from the opened water outlet 120; after the accumulated water is discharged, the repulsive force between the magnetic block 213 and the upper magnetic block 3311, and the suction force between the magnetic block 213 and the lower magnetic block 3313 reset the sealing cover 300, so that the upper end surface of the sealing cover 300 is close to the water outlet 120, thereby sealing the water outlet 120, and when the local drain does not drain or drains water, the gas in the sewer pipe is not easy to rise back to the room, thereby achieving odor prevention.

[0058] Under abnormal circumstances, such as when the external air pressure decreases due to seasonal changes or rainy days, the air pressure in the sealing section is higher than the external air pressure. When the force of the air pressure difference is greater than the gravity of the float 410 itself, the float 410 rises, so that the through hole 1 311 is connected to the through hole 2 312, that is, the sealing section is connected to the outside world, so that the atmospheric pressure of the sealing section is the same or similar to the external atmospheric pressure, thereby ensuring that the sealing cover 300 can move up and down normally. When the atmospheric pressure of the lower sealing section is balanced with the external atmospheric pressure, the force of the air pressure difference is less than the gravity of the float 410 itself, and the float 410 falls back and resets to seal the through hole 1 311. At this time, the sealing cover 300 can move up and down normally, thereby achieving the purpose of smoother discharge of accumulated water at the water inlet 110.

[0059] At the same time, when the surface water enters the sealing cover 300 through the water inlet 110, part of the water easily enters the stroke chamber 310 from the through hole 2 312. Since the density of the float 410 is less than the density of water, the float 410 floats on the water surface in the stroke chamber 310, and the floating member 400 moves up and down following the change of the water surface height in the stroke chamber 310, and the water entering the stroke chamber 310 is discharged into the sewer from the through hole 2 312; after the water entering the stroke chamber 310 is discharged from the through hole 1 311, part of the water enters the cavity 131 through the outer wall of the guide rod 330 and the airway 1 2111, and the water in the cavity 131 can be discharged to the sewer from the through hole 3 1311. After the water in the stroke chamber 310 is emptied, the floating member 400 seals the through hole 1 311 by its own gravity.

[0060] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A pressure-balanced floor drain, comprising a cylinder (100) and a reset device (200), wherein the upper end of the cylinder (100) is a water inlet (110), and the lower end of the cylinder (100) is a water outlet (120), the reset device (200) is arranged at the lower end of the cylinder (100), a sealing cover (300) is arranged between the reset device (200) and the cylinder (100), and the reset device (200) can apply a pre-tightening force to the sealing cover (300) so that the sealing cover (300) is tightly attached to the water outlet (120) to seal the water outlet (120), characterized in that: The sealing cover (300) is provided with a placement cavity (320), the upper end of the placement cavity (320) is detachably connected with a mounting cap (321), the mounting cap (321) has an inner cavity (3211), the inner cavity (3211) is connected with the placement cavity (320) and is combined to form a stroke cavity (310), a through hole 1 (311) connected with a sewer pipe is provided below the stroke cavity (310), a through hole 2 (312) connected with the outside is provided at the upper end of the mounting cap (321), a floating member (400) is movably provided in the stroke cavity (310), the movable stroke of the floating member (400) is limited by the stroke cavity (310), and the floating member (400) can seal the through hole 1 (311) by its own gravity; The inner wall of the placement cavity (320) is provided with an annular shoulder (322), the radius of the annular shoulder (322) is smaller than the radius of the floating member (400), the floating member (400) is located above the annular shoulder (322), and the outer wall of the floating member (400) is tightly abutted against the inner circle of the annular shoulder (322); the lower end of the annular shoulder (322) is provided with a connecting portion (323), and the through hole 1 (311) is located on the connecting portion (323); A guide rod (330) is arranged below the connecting portion (323), and an upper magnetic block (3311) is arranged at the upper end of the guide rod (330); the reset device (200) comprises an air replenishing core (210) and a fixing sleeve (220); a central hole (211) for sliding connection of the guide rod (330) is provided on the air replenishing core (210); a plurality of placement grooves (212) evenly distributed in the circumferential direction are provided at the lower end of the air replenishing core (210); a plurality of magnetic blocks (213) are arranged in a one-to-one correspondence in the plurality of placement grooves (212); the fixing sleeve (220) is fixed to the lower end of the air replenishing core (210) so as to seal the plurality of magnetic blocks (213) in the placement grooves (212), and the magnetic force between the magnetic blocks (213) and the upper magnetic block (3311) is a repulsive force; A lower magnetic block (3313) is disposed at the lower end of the guide rod (330); the magnetic force between the lower magnetic block (3313) and the upper magnetic block (3311) is an attraction force; a separation tube (3312) is disposed between the lower magnetic block (3313) and the upper magnetic block (3311); and the magnetic force between the lower magnetic block (3313) and the first magnetic block (213) is an attraction force; A support seat (130) is disposed at the lower end of the cylinder (100), the support seat (130) having a cavity (131) for the guide rod (330) to slide, the upper end of the support seat (130) is detachably connected to a shell (132), the air replenishing core (210) is detachably connected to the shell (132), and the inner wall of the central hole (211) is provided with a plurality of air passages (2111) connected to the cavity (131); A central column (230) is arranged in the air replenishing core (210), the central hole (211) is opened on the central column (230) and is coaxially arranged with the central column (230), the upper end of the central column (230) protrudes from the upper end of the shell (132), and the upper end of the central column (230) can be abutted against the lower end surface of the sealing cover (300), and the outer side of the central column (230) is provided with an air channel 2 (2301) connected to the cavity (131), and the upper end of the air channel 2 (2301) is lower than the upper end of the air channel 1 (2111).

2. The air pressure balanced floor drain according to claim 1, characterized in that: The floating member (400) includes a floating ball (410).

3. The air pressure balanced floor drain according to claim 2, characterized in that: The diameter of the second through hole (312) is smaller than the diameter of the float (410).

4. The air pressure balanced floor drain according to claim 2, characterized in that: A support block (3231) is provided at the upper end of the connecting portion (323), and the upper end surface of the support block (3231) can contact the bottom end of the floating ball (410).

5. The air pressure balanced floor drain according to claim 1, characterized in that: A through hole three (1311) connected to a sewer pipe is provided at the lower end of the cavity (131).

6. The air pressure balanced floor drain according to claim 1, characterized in that: A pressure cap (121) is provided at the water outlet (120), the lower end of the pressure cap (121) is connected to a sealing ring (122), and a movable flap (1221) is integrally formed at the lower end of the sealing ring (122), and the inner side wall of the movable flap (1221) can be in contact with the upper end surface of the sealing cover (300) to seal the water outlet (120).

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