CN219450989U - Floor drain capable of preventing backflow - Google Patents

Abstract

The utility model discloses a backflow-preventing floor drain, which belongs to the technical field of floor drains, and comprises: the floor drain body is provided with a water collecting cavity, a main drain hole is formed in the lower wall surface of the water collecting cavity, an auxiliary drain hole is formed in the side wall surface of the water collecting cavity, and the auxiliary drain hole is located above the main drain hole; a main drain pipe, one end of which is connected with the main drain hole; the auxiliary drain pipe, its one end with auxiliary drain hole is connected, auxiliary drain pipe is equipped with the check valve, the flow direction of check valve is by the water catch bowl flows to auxiliary drain pipe. The utility model has unique design, and can effectively prevent the water backflow problem of the floor drain when the main drain hole of the floor drain body is blocked by arranging the auxiliary drain hole.

Description

Floor drain capable of preventing backflow

Technical Field

The utility model belongs to the technical field of floor drain, and particularly relates to a backflow-preventing floor drain.

Background

The floor drain is a drainage device for connecting a drainage pipeline system with the indoor ground, and is widely applied to a residential drainage system. The performance of the floor drain is good and bad, and the quality of indoor air is greatly influenced. In the floor drain structure on the market, the water outlet is arranged at the lowest position of the floor drain, so that the full drainage is realized. However, the drain outlet is blocked due to long-time accumulation of silk fabrics such as hair and the like at the floor drain; if the water outlet is not dredged timely, water is caused to flow backward from the floor drain, so that the problem of flooding on the indoor ground is caused, and the life is influenced.

Disclosure of Invention

The utility model aims to provide a backflow-preventing floor drain, which is unique in design, and can effectively prevent the backflow of water when the main drain hole of the floor drain body is blocked by arranging auxiliary drain holes.

The technical scheme adopted for solving the technical problems is as follows:

the utility model discloses a backflow-preventing floor drain, which comprises:

the floor drain body is provided with a water collecting cavity, a main drain hole is formed in the lower wall surface of the water collecting cavity, an auxiliary drain hole is formed in the side wall surface of the water collecting cavity, and the auxiliary drain hole is located above the main drain hole;

a main drain pipe, one end of which is connected with the main drain hole;

the auxiliary drain pipe, its one end with auxiliary drain hole is connected, auxiliary drain pipe is equipped with the check valve, the flow direction of check valve is by the water catch bowl flows to auxiliary drain pipe.

The utility model has at least the following beneficial effects: during normal drainage, water in the water collecting cavity is drained through the main drainage hole of the floor drain body; when the main drain hole is blocked, water in the water collecting cavity can accumulate, after the water level rises by a certain height, the water can be drained from the auxiliary drain hole of the floor drain body, so that the situation that water in the water collecting cavity flows backwards due to excessive accumulation of water is avoided; the auxiliary drain pipe is provided with the one-way valve, when the main drain hole is blocked, the one-way valve is automatically opened by the acting force of water in the water collecting cavity, so that the auxiliary drain pipe can drain normally and smoothly, and when the main drain hole is used for draining water normally, the one-way valve is in a closed state, so that odor of the drain pipe is effectively isolated, and cockroaches and other insects are prevented from climbing out of the auxiliary drain pipe.

As a further improvement of the technical scheme, the anti-backflow floor drain also comprises an alarm device, a controller and a water level sensor; the water level sensor is arranged in the water collecting cavity, and the water level sensor and the alarm device are respectively and electrically connected with the controller. So set up, whether utilize water level sensor to detect the water in the water collecting cavity and reach the settlement water level, when main wash port appears blockking up and lead to water in the water collecting cavity can rise to the settlement water level, water level sensor can receive the trigger to send signal to the controller, make things convenient for controller control alarm device to send alarm information, in time inform the user to carry out the mediation of floor drain.

As a further improvement of the technical scheme, the water level sensor is a water level probe. So set up, when the water of water collecting cavity rises to the settlement water level, water can flood the water level probe, can utilize the conductivity of water, makes the electrode of water level probe switch on, makes the water level probe triggered and produces the detected signal to send to the controller, and water level probe small in size moreover, use simple to operate can directly throw into in the water collecting cavity in order to measure water level height.

As a further improvement of the technical scheme, the floor drain body comprises a shell and a floor drain cover, the shell is provided with the water collecting cavity, an opening of the water collecting cavity faces upwards, and the floor drain cover covers the opening of the water collecting cavity. So set up, when main wash port takes place to block up, the convenience of customers demolishs the floor drain lid from the casing fast, dredges the work to main wash port.

As a further improvement of the technical scheme, the floor drain cover is provided with a mounting hole penetrating through the floor drain cover up and down, and the water level probe is detachably arranged in the mounting hole. So set up, when the water level probe breaks down and need maintain the change, can dismantle the water level probe from the floor drain lid, need not to change the floor drain lid.

As a further improvement of the technical scheme, the one-way valve comprises a shell and a baffle, wherein the shell is provided with an inner cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the inner cavity, the baffle is covered on the water outlet, and the upper end of the baffle is hinged with the shell.

The check valve adopts the structure, when the main drain hole works normally, the baffle can automatically swing in place under the action of gravity, so that the baffle can block the drain outlet of the shell, and the odor of the auxiliary drain pipe is prevented from overflowing; when the main drain hole is blocked, water in the water collecting cavity can enter through the water inlet of the shell, acting force can be applied to the baffle plate, the baffle plate is driven to swing so that the drain outlet is opened, water in the water collecting cavity is discharged through the auxiliary drain pipe, and the problem that water flows backward due to excessive water accumulation in the water collecting cavity is well avoided.

As a further improvement of the above technical solution, the check valve further includes a first magnet and a second magnet, the first magnet is disposed on the upper surface of the housing, and the second magnet is disposed on the upper end of the baffle; when the baffle swings to be horizontal, the first magnet and the second magnet are opposite up and down, and the magnetic poles of the first magnet and the second magnet are the same.

In this way, in the process of fully draining the auxiliary drain pipe, the baffle can swing upwards to be in a horizontal state so as to enable the drain port to be completely opened, at the moment, strong magnetic force repulsion action is generated between the first magnet and the second magnet, and after the water in the auxiliary drain pipe is drained, the baffle can automatically swing downwards due to the double actions of self gravity and magnetic force repulsion and is tightly abutted with the shell so as to enable the drain port to be completely closed; the first magnet and the second magnet are added, the repulsive principle between the first magnet and the second magnet is utilized, the baffle can be tightly attached to the shell, the water outlet is fully shielded, the check valve is effectively prevented from flowing back, and therefore sanitation and safety of indoor space are guaranteed.

As a further improvement of the technical scheme, a sealing ring is arranged at the contact surface between the baffle and the shell. So set up, when baffle and shell looks butt, the sealing washer can atress take place deformation, can effectively apply sealed effect to the gap between baffle and the shell, avoids assisting the peculiar smell in the drain pipe to spill over through this gap.

As a further improvement of the technical scheme, the lower wall surface of the water collecting cavity is inclined to the main water drain hole from top to bottom. By the arrangement, water in the water collecting cavity can spontaneously flow to the main water drain hole due to the action of gravity, so that water in the water collecting cavity can be completely drained.

As a further improvement of the above technical solution, the other end of the auxiliary drain pipe is connected with the main drain pipe. So set up, the water in the auxiliary drain pipe can shift to main drain pipe to drain away through main drain pipe, thereby reduce the length of auxiliary drain pipe, reduce the manufacturing cost of this floor drain.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a perspective view of a structure of a backflow preventing floor drain provided by an embodiment of the utility model;

FIG. 2 is an exploded view of the structure of the anti-backflow floor drain provided by the embodiment of the utility model;

FIG. 3 is a top view of a backflow prevention floor drain provided by an embodiment of the utility model;

FIG. 4 is a schematic view of a structure of a backflow preventing floor drain according to an embodiment of the present utility model at a main viewing angle;

fig. 5 is an enlarged view of the structure of the portion a in fig. 4.

The figures are marked as follows: 100. a floor drain body; 110. a floor drain cover; 111. a water leakage hole; 120. a housing; 121. a water collecting cavity; 122. a main drain hole; 200. a main drain pipe; 201. a discharge outlet; 210. a right angle pipe; 220. a reducing straight-through joint; 230. a main pipe; 240. a three-way joint; 300. an auxiliary drain pipe; 400. a water level probe; 500. a one-way valve; 510. a housing; 520. a baffle; 600. sewage water; 710. a first magnet; 720. and a second magnet.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, if there is a word description such as "a plurality" or the like, the meaning of the plurality is one or more, the meaning of the plurality is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and above, below, within, etc. are understood to include the present number. The description of first, second, and third is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the drawing, the X direction is from the rear side to the front side of the anti-backflow floor drain, the Y direction is from the left side to the right side of the anti-backflow floor drain, and the Z direction is from the lower side to the upper side of the anti-backflow floor drain.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 5, several embodiments of the anti-backflow floor drain of the present utility model are presented below.

As shown in fig. 1 to 5, a first embodiment of the present utility model provides a floor drain for preventing backflow, which has a structure including a floor drain body 100, a main drain pipe 200, an auxiliary drain pipe 300, and a check valve 500. The floor drain has the advantages of simple structure, unique design, low manufacturing cost and the like, and can effectively prevent the floor drain from water backflow when the floor drain body 100 is blocked.

Wherein the floor drain body 100 has a water collecting cavity 121. Specifically, the floor drain body 100 includes a floor drain cover 110 and a housing 120. The inside of the shell 120 is hollow to form a water collecting cavity 121, and an opening of the water collecting cavity 121 is upward. The floor drain cover 110 is covered at the opening of the water collecting cavity 121. The floor drain cover 110 is provided with water leakage holes 111, and the water leakage holes 111 penetrate through the upper surface and the lower surface of the floor drain cover 110, respectively. The shape of the water leakage hole 111 may be a long strip shape, a circular shape, or the like. After the floor drain body 100 is installed on the ground, water on the ground can flow downwards into the water collecting cavity 121 through the water leakage holes 111.

The floor drain cover 110 is detachably connected with the housing 120. In some embodiments, the floor drain cover 110 is mounted to the housing 120 by screws. In other embodiments, the upper end opening of the water collecting cavity 121 is provided with a step portion, and the floor drain cover 110 may be directly placed at the step portion, so that the floor drain cover 110 may cover the upper end opening of the water collecting cavity 121.

It will be appreciated that the floor drain body 100 may be circular, rectangular, etc. in plan view, and is not limited thereto. The floor drain body 100 is made of a metal material such as stainless steel.

The floor drain body 100 is provided with a main drain hole 122 and an auxiliary drain hole. Specifically, the main drain hole 122 is provided at the lower wall surface of the water collecting chamber 121. In the present embodiment, the main drain hole 122 is provided at the center of the water collecting chamber 121. The auxiliary drain hole is provided at a sidewall surface of the water collecting chamber 121. The side wall surface of the water collecting chamber 121 is perpendicular to the lower wall surface of the water collecting chamber 121. It is understood that if the water collecting chamber 121 is square in a plan view, the auxiliary drain hole may be provided at a front wall, a rear wall, a left wall, or a right wall of the water collecting chamber 121. The main drain hole 122 and the auxiliary drain hole may be circular holes, square holes, etc.

The auxiliary drain hole is disposed above the main drain hole 122, and the lowest position of the auxiliary drain hole is higher than the main drain hole 122. When the main drain hole 122 is blocked, water in the water collecting cavity 121 gradually accumulates, and after the water in the water collecting cavity 121 reaches a certain water level, the water flows into the auxiliary drain hole.

In some embodiments, the lower wall of the water collection chamber 121 is planar.

In other embodiments, the lower wall surface of the water collecting cavity 121 is inclined, and specifically, the lower wall surface of the water collecting cavity 121 is inclined from top to bottom to the main drain hole 122. By this arrangement, the water in the water collecting chamber 121 can spontaneously flow to the main drain hole 122 due to the action of gravity, so that the water in the water collecting chamber 121 can be completely drained.

The main drain pipe 200 has two ends, one of which is provided with a drain inlet and the other of which is provided with a drain outlet 201. One end of the main drain pipe 200 is fixedly connected with the main drain hole 122, so that the drain inlet is communicated with the water collecting cavity 121. The other end of the main drain pipe 200 may be connected to a main drain pipe.

The auxiliary drain pipe 300 has two ends, one of which is an inlet end and the other of which is an outlet end. One end of the auxiliary drain pipe 300 is fixedly connected to the auxiliary drain hole, so that the auxiliary drain pipe 300 can communicate with the water collecting chamber 121. The other end of the auxiliary drain pipe 300 may be connected to a main drain pipe.

Of course, the other end of the auxiliary drain pipe 300 is fixedly connected to the main drain pipe 200. In this embodiment, the main drain pipe 200 includes a right-angle pipe 210, a reducing straight-through joint 220, a main pipe 230 and a three-way joint 240, wherein an upper end opening of the right-angle pipe 210 is fixedly connected with the main drain hole 122, and a lower end opening of the right-angle pipe 210, the reducing straight-through joint 220, the main pipe 230 and an inlet of the three-way joint 240 are sequentially connected. The other end of the auxiliary drain pipe 300 is connected to the other inlet of the three-way joint 240, and the drain outlet 201 of the three-way joint 240 is connected to the main drain pipe.

It will be appreciated that so configured, the water in the auxiliary drain pipe 300 can be transferred to the main drain pipe 200 and drained through the main drain pipe 200, thereby reducing the length of the auxiliary drain pipe 300 and reducing the manufacturing cost of the floor drain.

In the present embodiment, the aperture of the main drain hole 122 is larger than that of the auxiliary drain hole. The three-way connector 240 is a different-diameter oblique-insertion three-way connector.

The check valve 500 is provided on the auxiliary drain pipe 300. The check valve 500 flows from the water collecting chamber 121 to the auxiliary drain pipe 300. Therefore, the water in the water collecting chamber 121 can flow into the auxiliary drain pipe 300 through the check valve 500, and the water or the odor in the auxiliary drain pipe 300 cannot flow into the water collecting chamber 121 through the check valve 500. In this embodiment, the check valve 500 is located at the auxiliary drain hole of the housing 120.

In some embodiments, the check valve 500 is of a conventional check valve structure, and water in the water collecting chamber 121 needs to push the valve plate of the check valve 500 against the spring force of the check valve 500, thereby flowing into the auxiliary drain pipe 300.

In other embodiments, the structure of the check valve 500 includes a baffle 520 and a housing 510.

The shell 510 is internally hollow to form an inner cavity, the shell 510 is provided with a water inlet and a water outlet which are arranged oppositely, and the water inlet and the water outlet are both communicated with the inner cavity.

The barrier 520 covers the drain port provided at the housing 510, and the upper end of the barrier 520 is hinged to the housing 510 by a hinge shaft, so that the barrier 520 can swing forward around the hinge shaft to open the drain port of the housing 510, or the barrier 520 swings reversely around the hinge shaft to close the drain port of the housing 510.

The shutter 520 has two extreme positions, namely a vertical position and a horizontal position. Specifically, when the baffle 520 is in a horizontal state, the baffle 520 does not block the water outlet of the housing 510, so that the water outlet is completely opened; when the barrier 520 is in the vertical state, the barrier 520 contacts the housing 510 to block the drain opening, thereby completely closing the drain opening.

It will be appreciated that the check valve 500 is configured such that when the main drain hole 122 is in normal operation, the baffle 520 automatically swings in place due to gravity, and at this time, the baffle 520 is in a vertical state, so that the baffle 520 can block the drain opening of the outer casing 510, and prevent the odor of the auxiliary drain pipe 300 from overflowing. When the main drain hole 122 is blocked, water in the water collecting cavity 121 can enter through the water inlet of the shell 510, and an acting force is applied to the baffle 520 to drive the baffle 520 to swing so as to open the drain outlet, so that the water in the water collecting cavity 121 is discharged through the auxiliary drain pipe 300, and the problem of water backflow caused by excessive water accumulation in the water collecting cavity 121 is well avoided.

Also, the center of gravity of the barrier 520 is higher than the lowest position of the housing 510, and water at the lowest position of the housing 510 is caused to easily push the barrier 520 and flow into the auxiliary drain pipe 300 using the lever principle.

Further, the structure of the check valve 500 further includes a first magnet 710 and a second magnet 720.

The first magnet 710 is disposed on the upper surface of the housing 510. Specifically, the upper surface of the housing 510 is provided with a mounting groove, and the first magnet 710 may be fixed in the mounting groove on the housing 510 by means of gluing, screwing or clamping. The first magnet 710 may be a bar magnet, a ring magnet, or the like, and is not limited thereto. The upper and lower ends of the first magnet 710 may have magnetic poles, the upper end of the first magnet 710 may have N poles, and the lower end of the first magnet 710 may have S poles.

The second magnet 720 is disposed at the upper end of the barrier 520. Specifically, the upper end of the baffle 520 protrudes upward to form a connection portion, the connection portion is provided with an installation groove, and the second magnet 720 can be fixed in the installation groove on the baffle 520 in a screw connection manner, a clamping manner or an adhesive manner. When the barrier 520 is in a vertical state, both ends of the second magnet 720 extend in a horizontal direction, and both ends of the second magnet 720 are magnetic poles.

After the shutter 520 swings upward to be horizontal, the first magnet 710 and the second magnet 720 are opposite to each other up and down, and the poles of the first magnet 710 and the second magnet 720 are the same. Specifically, when the baffle 520 is in the horizontal state, the second magnet 720 is located directly above the first magnet 710, the lower end of the second magnet 720 is the N pole, the upper end of the second magnet 720 is the S pole, and the upper end of the first magnet 710 is the N pole, so that a certain magnetic force repulsive interaction is generated between the second magnet 720 and the first magnet 710.

It will be appreciated that during the process of sufficiently draining the auxiliary drain pipe 300, the baffle 520 swings upward to be in a horizontal state, so that the drain port is completely opened, and at this time, a strong magnetic force repulsive action is generated between the first magnet 710 and the second magnet 720; after the water in the auxiliary drain pipe 300 is drained, the baffle 520 automatically swings downward due to the dual actions of self gravity and magnetic repulsion, and is tightly abutted with the housing 510, so that the drain port is completely closed. The first magnet 710 and the second magnet 720 are added in the structure of the check valve 500, and the repulsive force between the first magnet 710 and the second magnet 720 is utilized to drive the baffle 520 to reset, so that the baffle 520 can be tightly attached to the shell 510, the water outlet of the shell 510 is fully shielded, the check valve 500 is effectively prevented from flowing back, and the sanitation and safety of an indoor space are ensured.

Further, the structure of the check valve 500 further includes a sealing ring. A seal ring is provided at the interface between the baffle 520 and the housing 510. Specifically, the housing 510 may be provided with a sealing groove, and a sealing ring is provided in the sealing groove. Alternatively, the barrier 520 is provided with a receiving groove in which the sealing ring is disposed. Because of the existence of manufacturing errors, gaps exist between the baffle 520 and the shell 510, and therefore, the baffle 520 is provided with a sealing ring, when the baffle 520 is abutted against the shell 510, the sealing ring is stressed to deform, so that the gaps between the baffle 520 and the shell 510 can be effectively sealed, and peculiar smell in the auxiliary drain pipe 300 is prevented from overflowing through the gaps.

In some embodiments, the floor drain structure further comprises a controller, a water level sensor and an alarm device.

A water level sensor is provided in the water collecting chamber 121, and the water level sensor is used to detect whether the water in the water collecting chamber 121 reaches a set water level. The water level sensor and the alarm device are respectively and electrically connected with the controller, and the connection mode can be a wireless connection mode or a wired connection mode.

It is understood that the alarm device may be an audible alarm, an audible and visual alarm, etc., and is not limited herein. The controller can be a PLC controller, a singlechip and the like. The structure of the controller belongs to the prior art, and the utility model claims an electric connection mode of the controller.

In some embodiments, the alarm device and the controller may be provided on the floor drain body 100, the floor drain body 100 being provided with a receiving recess for receiving the alarm device and the controller. In other embodiments, the alarm device and controller may be located on the wall, relatively close to the floor drain.

It can be understood that the water level sensor is utilized to detect whether the sewage 600 in the water collecting cavity 121 reaches the set water level, when the main drain hole 122 is blocked to cause the sewage 600 in the water collecting cavity 121 to rise to the set water level, the water level sensor is triggered and sends a signal to the controller, so that the controller can conveniently control the alarm device to send out alarm information, and timely inform a user of dredging the floor drain. Therefore, the floor drain has the function of alarming when being blocked.

In some embodiments, the water level sensor is a water level probe 400, i.e., an electrode type water level sensor. It will be appreciated that the water level probe 400 has two electrodes, and that when the two electrodes are in conduction, the water level probe 400 generates an electrical signal. When the sewage 600 in the water collecting cavity 121 rises to the set water level, the sewage 600 floods the water level probe 400, at this time, the two electrodes of the water level probe 400 are conducted with each other by using the conductivity of water, so that the water level probe 400 is triggered to generate a detection signal, and the detection signal is sent to the controller. When the water level of the sewage 600 in the water collecting chamber 121 has not reached the set water level, both electrodes of the water level probe 400 are not turned on, and thus, the water level probe 400 does not generate a detection signal.

Moreover, the water level probe 400 has the advantages of small volume, convenient use and installation, and the like, and can be directly put into the water collecting cavity 121 to measure the water level, and the water level probe 400 occupies small space of the floor drain body 100, so that the floor drain body 100 can be designed to be smaller without being designed to be larger according to the water level probe 400.

The two electrodes of the water level probe 400 may be made of a corrosion-resistant conductive material.

The floor drain cover 110 is provided with mounting holes penetrating the upper and lower surfaces of the floor drain cover 110, respectively. The water level probe 400 is detachably installed in the installation hole. Specifically, the mounting hole is a stepped hole, and the water level probe 400 can be inserted into the mounting hole from top to bottom and is sufficiently supported.

So set up, when the water level probe 400 breaks down and needs maintenance change, can dismantle the water level probe 400 from floor drain lid 110, need not to change floor drain lid 110.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A backflow-preventing floor drain, comprising:

the floor drain body is provided with a water collecting cavity, a main drain hole is formed in the lower wall surface of the water collecting cavity, an auxiliary drain hole is formed in the side wall surface of the water collecting cavity, and the auxiliary drain hole is located above the main drain hole;

a main drain pipe, one end of which is connected with the main drain hole;

the auxiliary drain pipe, its one end with auxiliary drain hole is connected, auxiliary drain pipe is equipped with the check valve, the flow direction of check valve is by the water catch bowl flows to auxiliary drain pipe.

2. The anti-backflow floor drain of claim 1, further comprising an alarm device, a controller, and a water level sensor; the water level sensor is arranged in the water collecting cavity, and the water level sensor and the alarm device are respectively and electrically connected with the controller.

3. A backflow preventing floor drain as claimed in claim 2, wherein the water level sensor is a water level probe.

4. A backflow-preventing floor drain as claimed in claim 3, wherein the floor drain body comprises a housing and a floor drain cover, the housing is provided with the water collecting cavity, the opening of the water collecting cavity faces upwards, and the floor drain cover covers the opening of the water collecting cavity.

5. A backflow preventing floor drain as claimed in claim 4, wherein the floor drain cover is provided with a mounting hole penetrating up and down, and the water level probe is detachably provided in the mounting hole.

6. A backflow preventing floor drain as claimed in claim 1, wherein the one-way valve comprises a housing and a baffle, the housing being provided with an inner cavity, a water inlet and a water outlet, both of which are in communication with the inner cavity, the baffle being arranged to cover the water outlet, the upper end of the baffle being hinged to the housing.

7. The anti-reverse flow floor drain according to claim 6, wherein the check valve further comprises a first magnet and a second magnet, the first magnet being provided on the upper surface of the housing, the second magnet being provided on the upper end of the baffle; when the baffle swings to be horizontal, the first magnet and the second magnet are opposite up and down, and the magnetic poles of the first magnet and the second magnet are the same.

8. A backflow preventing floor drain as claimed in claim 7, wherein the contact surface between the baffle and the housing is provided with a sealing ring.

9. A floor drain against backflow according to claim 1, wherein the lower wall surface of the water collection chamber is inclined from top to bottom to the main drain hole.

10. A backflow preventing floor drain as claimed in claim 1, wherein the other end of the auxiliary drain pipe is connected to the main drain pipe.