CN217325713U - Deodorant excessive lower mouth of a river plugging device of gas - Google Patents

Abstract

The utility model provides a deodorant excessive lower mouth of a river plugging device of gas, the package rubbing board comprises a core body, the lower part that the upper end of core was equipped with water inlet, lateral wall is equipped with the outlet, the second that is used for the shutoff outlet is equipped with on the core lateral wall of outlet department movably, the core bottom is equipped with the end cap that seals the core, the up end of end cap is equipped with the first arc sphere of undercut, the lower terminal surface is equipped with the second arc sphere of undercut. The utility model discloses a set up the first water seal district that first manger plate ring, second manger plate ring formed in the water seal box to and set up the second way water seal district that first anti-odor board, second anti-odor board, core inner chamber bottom formed on the core, total four deodorant gas leakage measures, deodorant effectual, and difficult inefficacy.

Description

Deodorant excessive lower mouth of a river plugging device of gas

Technical Field

The utility model relates to a floor drain field especially relates to an excessive lower mouth of a river plugging device of deodorant gas.

Background

The floor drain is widely applied to kitchens and toilets, becomes an indispensable drainage facility in people's life by virtue of the functions of deodorization, insect prevention, blockage prevention, back overflow prevention and the like, and provides guarantee for the cleanness of the kitchens and the toilets. However, the insect-proof and odor-proof floor drain on the market at present has a better effect when being used at the beginning, but the effect is reduced after being used for a period of time, and the reason is not the product production quality, but the design does not consider the air flow pressure in the sewer. The drainage mode of the traditional Chinese dwellings is independent for each household, sewage flows automatically at home and does not interfere with each other, but the existing cities are tall buildings, all drainage pipelines are integrated into a whole by being connected in parallel or in series, and the pipelines are communicated and interfere with each other. The difference in temperature that the change of weather produced, the gaseous of effluent water sump fermentation production, upstairs during downstairs drainage, the positive negative pressure that forms in the pipeline can change at any time, in addition can hardly avoid in the floor drain to have debris to exist, these all can cause sealed inefficacy, lead to peculiar smell in the pipeline, the insect can enter into indoorly through the floor drain, influence people's quality of life, more serious be harmful microorganism such as virus in the pipeline, bacterium also can follow the sealed inefficacy of floor drain and get into the family, influence people's health.

SUMMERY OF THE UTILITY MODEL

According to the above-mentioned provide because the pipeline intercommunication, the difference in temperature, the effluent water sump fermentation that the change of weather produced when gas, upstairs downstairs drainage, the positive negative pressure that forms in the pipeline can change at any time, and it has debris to exist to be difficult for in the floor drain, causes the technical problem of the sealed inefficacy of floor drain, the utility model provides a deodorant excessive lower mouth of a river plugging device, its characterized in that: the deodorant core comprises a core body, wherein a water inlet is formed in the upper end of the core body, a water outlet is formed in the lower portion of the side wall of the core body, a second deodorant plate used for blocking the water outlet is movably mounted on the side wall of the core body at the water outlet, a plug for sealing the core body is arranged at the bottom of the core body, a first arc-shaped spherical surface which is sunken downwards is arranged on the upper end face of the plug, and a second arc-shaped spherical surface which is sunken upwards is arranged on the lower end face of the plug.

Furthermore, the upper end of core is equipped with the water seal box, the water seal box includes the box body, be equipped with the second screw hole in the middle of the bottom plate of box body, the top of box body is covered with the upper cover that has the hole that leaks movably, the bottom of box body is passed through the second screw hole with core threaded connection.

Furthermore, a flat plate which extends inwards and is horizontally arranged is arranged on the side wall of the core body at the upper end of the water outlet, an inclined plate which inclines downwards is arranged at the other end of the flat plate, and a vertical plate which is vertical to the horizontal direction is arranged at the lower end of the inclined plate; the height difference between the lower end surface of the vertical plate and the cross section of the side wall of the core body at the water drainage port is H2, and H2 is more than or equal to 5mm and less than or equal to 40 mm; after the two sides of the flat plate, the inclined plate and the vertical plate are hermetically connected with the side wall, the lower part of the core body is divided into two chambers with mutually communicated bottoms, and the water outlet is formed; the second odor-resistant plate is of a plate-shaped structure, one end of the second odor-resistant plate is a plane, and the other end face of the second odor-resistant plate is a cambered surface; two second hinged seats are fixed on the upper part of the side surface of the vertical plate, which is positioned on the side of the water drainage port, and the second hinged shafts are movably arranged in the second hinged seats; the included angle between the second deodorant plate and the side wall of the core body after being covered and the horizontal direction is alpha, and alpha is more than or equal to 30 degrees and less than or equal to 60 degrees.

Further, be equipped with an upwards convex fender platform above the end cap of riser lower extreme, the side lower part that the riser is located the drain hole side is fixed with two first articulated seats, two swivelling joint has first deodorant board between the first articulated seat, first deodorant board be one end for the plane, all the other terminal surfaces with the cambered surface platelike structure of core inside wall adaptation, the plane end of first deodorant board is equipped with first articulated axle mount pad, the both ends of first articulated axle mount pad are equipped with first articulated shaft, first articulated shaft is adorned in first articulated seat movably.

Furthermore, an inwards concave diversion trench is arranged on the outer side wall of the core body at the upper end of the water outlet.

Furthermore, an annular step platform with a narrow upper part and a wide lower part is arranged on the outer wall of the core body end, a second external thread is arranged on the upper part of the annular step platform, a first external thread is arranged on the lower part of the annular step platform, and a first internal thread is arranged on the inner wall of the top end of the core body.

Furthermore, a first threaded hole is formed in the middle of the upper cover, and a first water retaining ring is arranged on the bottom surface of the upper cover on the inner side of the water leakage hole; a second water retaining ring is arranged on the bottom plate of the box body, the height difference between the end faces of the second water retaining ring and the first water retaining ring is H1, and H1 is larger than or equal to 3mm and smaller than or equal to 10 mm.

Furthermore, an annular filter screen is arranged between the first water retaining ring and the bottom plate of the box body.

Furthermore, the second threaded hole is formed in the inner side of a circular ring, the circular ring protrudes downwards from the lower end face of the box body bottom plate, and the upper end of the circular ring is connected with the bottom plate into a whole.

Furthermore, a first threaded hole is formed in the middle of the upper cover, a circular groove is formed in the middle of one side of the upper cover, and second internal threads are formed in the inner wall of the groove.

The utility model has the advantages of it is following:

1. through set up first manger plate ring, the first water seal district that second manger plate ring formed in the water seal box to and set up the second that first deodorant board, second deodorant board, core inner chamber bottom formed and say the water seal district on the core, total 4 deodorant gas leakage measures, deodorant effectual, and difficult inefficacy.

2. The outer side of the plug at the bottom of the core body is made into an inward-concave arc spherical surface, so that a reflecting pressure is formed on gas in a pipeline, odor is not easy to jump up along the core body and the pipe wall of a sewer pipe, and the risk of odor leakage is reduced.

3. The flat plate arranged at the upper end of the water outlet can play a certain role in reflecting the upward sewage and the upward odor pushed by the sewage, thereby reducing the risk of odor leakage.

4. The utility model discloses when quick, a large amount of drainage, the distributive groove that sets up on the core outer wall can make and in time can not shunt the core outer wall gap all around through the gap exhaust sewage between drain department core lateral wall and the downcomer for drainage speed reduces the pressure of drainage.

5. Through replacing different upper covers, the utility model discloses can enlarge the range of application and not only be used in on the floor drain, also can be applied to the drainage of kitchen sink.

6. The utility model discloses when using in kitchen sink drainage, the basin is lower because of having saved the return water elbow, has increased storing space with current product comparison.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is an assembly view of the concrete floor and sewer pipe of the present invention.

Fig. 2 is a cross-sectional view of a front view of the core of fig. 1.

Fig. 3 is a side view of fig. 2.

Fig. 4 is a cross-sectional view of a front view of the cassette of fig. 1.

Fig. 5 is a top view of fig. 4.

Fig. 6 is an assembly view of the present invention, in which the core body and the upper cover are installed through the connecting sleeve and the sewer pipe.

Fig. 7 is a cross-sectional view of a front view of the upper cover of fig. 6.

Fig. 8 is a top view of fig. 7.

In the figure: 1. a concrete floor; 2. a water seal box; 2.1, covering; 2.11, water leakage holes; 2.12, a first threaded hole; 2.13, a first water retaining ring; 2.14, a filter screen; 2.15, grooves; 2.2, a box body; 2.21, a second water retaining ring; 2.22, a second threaded hole; 2.23, a circular ring; 3. a drain pipe clamping ring; 4. a drain pipe; 5. locking a ring; 6. a seal ring; 7. a core body; 7.1, a first hinge seat; 7.2, a first articulated shaft; 7.3, a first hinge shaft mounting seat; 7.4, a vertical plate; 7.5, an annular step platform; 7.6, a first external thread; 7.7, second external thread; 7.8, water inlet; 7.9, a first internal thread; 7.10, a water diversion tank; 7.11, a second hinge seat; 7.12, a second articulated shaft; 7.13, a second hinge shaft mounting seat; 7.14, flat plate; 7.15, sloping plate; 7.16, a second anti-odor plate; 7.17, a water outlet; 7.18, a first anti-odor plate; 7.19, blocking platforms; 7.20, a plug; 7.21, a first arc-shaped spherical surface; 7.22, a second arc-shaped spherical surface; 8. a connecting sleeve; 8.1, a second internal thread; 9. a sewer pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a sewer inlet plugging device for preventing odor from overflowing, which comprises a core body 7, wherein the upper end of the core body 7 is provided with a water inlet 7.8, the lower part of the side wall of the core body 7 is provided with a water outlet 7.17, and the side wall of the core body 7 at the position of the water outlet 7.17 is movably provided with a second odor-resistant plate 7.16 for plugging the water outlet 7.17; a plug 7.20 for closing the core body 7 is arranged at the bottom of the core body 7, a first arc-shaped spherical surface 7.21 which is sunken downwards is arranged on the upper end surface of the plug 7.20, and a second arc-shaped spherical surface 7.22 which is sunken upwards is arranged on the lower end surface of the plug 7.20; the upper end of the core body 7 can also be provided with a water seal box 2, the water seal box 2 comprises a box body 2.2 and an upper cover 2.1 which is movably covered on the box body 2.2 and is provided with a water leakage hole 2.11, a second threaded hole 2.22 is arranged in the middle of the bottom plate of the box body 2.2, the bottom of the box body 2.2 and the second threaded hole 2.22 are in threaded connection with the core body 7, and a sealing ring 6 can be arranged at the joint of the core body 7 and the box body 2.2 to enhance the sealing effect; a flat plate 7.14 which extends inwards and is horizontally arranged is arranged on the side wall of the core body 7 at the upper end of the water outlet 7.17, an inclined plate 7.15 which inclines downwards is arranged at the other end of the flat plate 7.14, and a vertical plate 7.4 which is vertical to the horizontal direction is arranged at the lower end of the inclined plate 7.15; the second deodorization plate 7.16 is a plate-shaped structure with one end being a plane and the other end faces being cambered surfaces, and when the second deodorization plate 7.16 covers the water outlet 7.17, the end faces of the second deodorization plate should not be exposed out of the side wall of the core body 7; a second hinge shaft mounting seat 7.13 is arranged at the plane end of the second deodorization plate 7.16, and second hinge shafts 7.12 are arranged at the two ends of the second hinge shaft mounting seat 7.13; two second hinged seats 7.1 are fixed on the upper part of the side surface of the vertical plate 7.4 positioned at the side of the water outlet 7.17, and a second hinged shaft 7.12 is movably arranged on the second hinged seats 7.1; the included angle between the second deodorization plate 7.16 and the horizontal direction after the side wall of the core body 7 is covered is alpha, alpha is more than or equal to 30 degrees and less than or equal to 60 degrees, and the best angle is 35 degrees; the height difference between the lower end surface of the vertical plate 7.4 and the lower end surface of the side wall of the core body 7 provided with the water outlet 7.17 is H2, H2 is more than or equal to 5mm and less than or equal to 40mm, and the best height difference is 20 mm; after the flat plate 7.14, the inclined plate 7.15 and two sides of the vertical plate 7.4 are hermetically connected with the side wall of the core body 7, the lower part of the core body 7 is divided into two chambers with mutually communicated bottoms, and a water outlet 7.17 is formed; the bottom of the core body 7 is provided with a plug 7.20 for closing the lower end of the core body 7, the upper end surface of the plug 7.20 is provided with a first arc-shaped spherical surface 7.21 which is sunken downwards, and the lower end surface is provided with a second arc-shaped spherical surface 7.22 which is sunken upwards. The working principle of the device is illustrated by taking the device as an example to be installed on a concrete ground 1, as shown in figure 1, after a core 7 and a box body 2.2 of the device are connected, the core 7 is inserted into a sewer pipe 9 embedded in the concrete ground 1 from a reserved opening on the ground, the device is fixed under the ground after the space between the periphery of the box body 2.2 and a reserved hole is filled with cement, and a certain gap is reserved between the outer wall of the core 7 and the inner wall of the sewer pipe 9 so as to discharge sewage from a water outlet 7.17 at the side part of the core 7. When the sewage draining device is used, water flows into the box body 2.2 through the water leakage holes 2.11 on the upper cover 2.1 and flows into the inner cavity of the core body 7 through the water inlet 7.8 of the core body 7, most of the water flows into a pipeline from the water draining hole 7.17 after sewage enters the inner cavity, but at last a small part of the water is remained at the bottom of the inner cavity to prevent harmful substances such as odor and the like in the pipeline from entering the core body 7 from the water draining hole 7.17; meanwhile, when water flows through the second deodorization plate 7.16 arranged on the side wall of the core body 7, the water flows out by turning upwards under the impact of the water, and the water outlet 7.17 is sealed under the action of the gravity of the water, so that harmful substances in a pipeline are further prevented from entering; when water flows through the pipeline, the water can push the gas in the pipeline to impact the box body 2.2 and the core body 7 along with a gap between the core body 7 and the sewer pipe 9, the arrangement of the sealing ring 6 prevents harmful substances such as odor and the like from entering a room from the joint of the box body 2.2 and the core body 7, and the water retained in the core body 7 and the second deodorization plate 7.16 are sealed in a double way, so that the harmful substances are difficult to enter the room through the water outlet 7.17 of the core body 7; the flat plate 7.14 arranged above the water outlet 7.17 can also block and reflect part of the uprush gas to the lower sewer pipe 9; the concave second spherical arc 7.22 at the lower part of the plug 7.20 has a reflection effect, and reduces the airflow flowing to the gap between the core 7 and the downcomer 9.

In a preferred embodiment, as shown in fig. 2, an upward convex baffle 7.19 is arranged on a plug 7.20 at the lower end of the vertical plate 7.4, and the baffle 7.19 is positioned at one side of the central axis of the core body 7, which is deviated to the water outlet 7.17; two first hinged seats 7.1 are fixed on the lower portion of the side face of the vertical plate 7.4, which is located on the side of the water outlet 7.17, a first deodorization plate 7.18 is rotatably connected between the two first hinged seats 7.1, the first deodorization plate 7.18 is of a cambered plate-shaped structure with one end being a plane and the other end faces being matched with the inner side wall of the core body 7, and the first deodorization plate 7.18 is in clearance fit with the inner wall of the core body 7 so that the first deodorization plate 7.18 can be freely opened and closed; a first hinge shaft mounting seat 7.3 is arranged at the plane end of the first deodorization plate 7.18, a first hinge shaft 7.2 is arranged at the two ends of the first hinge shaft mounting seat 7.3, and the first hinge shaft 7.2 is movably arranged in the first hinge shaft mounting seat 7.1; when water flows from the water inlet 7.8 to the water outlet 7.17, the first deodorization plate 7.18 is opened to discharge water, and conversely, when harmful substances such as air flow or sewage flow back from the sewer pipe 9, the first deodorization plate 7.18 rotates towards the inner cavity of the core body 7 and is closed when the baffle table 7.19 is touched. This embodiment corresponds to the addition of a further measure to prevent harmful substances from entering the room through the device from the down pipes 9.

In a preferred embodiment, as shown in fig. 2 and 3, a concave diversion channel 7.10 is arranged on the outer side wall of the core 7 at the upper end of the water outlet 7.17; when too much water flows into the downcomer 9 from the drain opening 7.17, the water is gathered at the gap between the side wall of the core 7 at the side of the drain opening 7.17 and the downcomer 9 and forms a certain pressure, so that the water is difficult to discharge; the water diversion grooves 7.10 can divert excessive water into all gaps between the core body 7 and the downcomer 9 and then flow into the downcomer 9 along the gaps, so that the water is discharged quickly.

As a preferred embodiment, as shown in fig. 2, an annular step 7.5 with a narrow top and a wide bottom is provided on the outer wall of the top end of the core 7, a second external thread 7.7 is provided on the upper part of the annular step 7.5, and a first external thread 7.6 is provided on the lower part; the first external thread 7.6 can be used for connecting the core body 7 with the second threaded hole 2.22 on the box body 2.2, the locking ring 5 is arranged on the second external thread 7.7, the sealing ring 6 with the sealing effect is additionally arranged between the locking ring 5 and the core body 7, the locking ring 5 not only has the sealing effect, but also further strengthens the connection stability of the core body 7 and the box body 2.2; meanwhile, the arrangement of the annular step platform 7.5 increases the width of a gap between the core body 7 and the sewer pipe 9, which is more beneficial to drainage; be equipped with first internal thread 7.9 on the inner wall at core 7 top, when the unable installation box body 2.2 of service position of this device, can be connected drain pipe 4 directly through threaded connection's mode with first internal thread 7.9.

As a preferred embodiment, as shown in fig. 4, a first threaded hole 2.12 is formed in the middle of the upper cover 2.1, and a first water retaining ring 2.13 is arranged on the bottom surface of the upper cover 2.1 inside the water leakage hole 2.11; a second water retaining ring 2.21 is arranged on the bottom plate of the box body 2.2, the height difference between the second water retaining ring 2.21 and the end surface of the first water retaining ring 2.13 is H1, H1 is more than or equal to 3mm and less than or equal to 10mm, and the best height difference is 5 mm; after the drain pipe clamping ring 3 with a through hole in the middle is assembled at the first threaded hole 2.12, the drain pipe 4 can be inserted, for example, the drain pipe 4 of a washing machine can be connected with the device in this way; the first water retaining ring 2.13 and the second water retaining ring 2.21 form a sealed water cavity, and further prevent the harmful substances in the pipeline from leaking.

As a preferred embodiment, as shown in fig. 4, an annular filter screen 2.14 is arranged between the first water retaining ring 2.13 and the bottom plate of the box body 2.2; the filter screen 2.14 is arranged to prevent solid substances such as hair and paper sheets from entering the core 7 and then hanging on the second deodorizing board 7.16 or the first deodorizing board 7.18 to affect the sealing effect.

As a preferred embodiment, as shown in fig. 4, the second threaded hole 2.22 is arranged inside a circular ring 2.23, and the circular ring 2.23 protrudes downwards from the lower end face of the bottom plate of the box body 2.2 and is connected with the bottom plate into a whole; this way the length of the internal thread in the second threaded hole 2.22 is extended, enhancing the strength of the threaded fit there.

As a preferred embodiment, as shown in fig. 6, 7 and 8, a first threaded hole 2.12 is formed in the middle of the upper cover 2.1, a circular groove 2.15 is formed in the middle of one side of the upper cover 2.1, and a second internal thread 8.2 is formed on the inner wall of the groove 2.15; the core body 7 is connected with a second external thread 7.7 and a second internal thread 8.2 which are arranged on the core body, and after a sealing ring 6 is additionally arranged between the core body and the second external thread 7.2, the upper cover 2.1 and the core body 7 are combined together to form a whole; then the core body 7 and the connecting sleeve 8 are combined together through the connection of the connecting sleeve 8 with the inner side of the pipe wall at the upper part provided with the internal thread 8.1 and the first external thread 7.6; the other end of the connecting sleeve 8 can be communicated with the sewer pipe 9 and sealed by glue at the joint. This embodiment can be used at the junction of the sink and the sewer pipe 9 of a kitchen.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. The utility model provides a deodorant excessive lower mouth of a river plugging device which characterized in that: the deodorant comprises a core body (7), wherein the upper end of the core body (7) is provided with a water inlet (7.8), the side wall of the lower part of the core body is provided with a water outlet (7.17), and a second deodorant plate (7.16) for plugging the water outlet (7.17) is movably arranged on the side wall of the core body (7) at the position of the water outlet (7.17); the core body (7) bottom is equipped with end cap (7.20) of closed core body (7), the up end of end cap (7.20) is equipped with first arc sphere (7.21) of undercut, and the lower terminal surface is equipped with second arc sphere (7.22) of undercut.

2. The sewer inlet plugging device for preventing odor from overflowing, according to claim 1, is characterized in that: the upper end of core (7) is equipped with water seal box (2), water seal box (2) are including box body (2.2), be equipped with second screw hole (2.22) in the middle of the bottom plate of box body (2.2), the top of box body (2.2) is covered with upper cover (2.1) that has water leakage hole (2.11) movably, the bottom of box body (2.2) is in second screw hole (2.22) department with core (7) threaded connection.

3. The sewer inlet plugging device for preventing odor from overflowing, according to claim 1, is characterized in that: a flat plate (7.14) which extends inwards and is horizontally arranged is arranged on the side wall of the core body (7) at the upper end of the water outlet (7.17), an inclined plate (7.15) which inclines downwards is arranged at the other end of the flat plate (7.14), and a vertical plate (7.4) which is vertical to the horizontal direction is arranged at the lower end of the inclined plate (7.15); the height difference between the lower end surface of the vertical plate (7.4) and the cross section of the side wall of the core body (7) at the water outlet (7.17) is H2, and H2 is more than or equal to 5mm and less than or equal to 40 mm; after the two sides of the flat plate (7.14), the inclined plate (7.15) and the vertical plate (7.4) are hermetically connected with the side wall, the lower part of the core body (7) is divided into two chambers with communicated bottoms, and a water outlet (7.17) is formed; the second deodorant plate (7.16) is of a plate-shaped structure with one flat end and the other cambered end surfaces, a second hinge shaft mounting seat (7.13) is arranged at the flat end of the second deodorant plate (7.16), and second hinge shafts (7.12) are arranged at the two ends of the second hinge shaft mounting seat (7.13); two second hinged seats (7.1) are fixed on the upper part of the side surface of the vertical plate (7.4) positioned at the side of the water outlet (7.17), and the second hinged shafts (7.12) are movably arranged in the second hinged seats (7.1); the included angle between the second deodorant plate (7.16) and the horizontal direction after the second deodorant plate and the side wall of the core body (7) are covered is alpha, and alpha is more than or equal to 30 degrees and less than or equal to 60 degrees.

4. The odour overflow preventing sewer inlet plugging device according to claim 3, wherein: be equipped with one convex fender platform (7.19) that makes progress above end cap (7.20) of riser (7.4) lower extreme, riser (7.4) are located the side lower part of outlet (7.17) side and are fixed with two first articulated seats (7.1), two swivelling joint has first deodorant board (7.18) between first articulated seat (7.1), first deodorant board (7.18) be one end for the plane, all the other terminal surfaces be with the cambered surface platelike structure of core (7) inside wall adaptation, the plane end of first deodorant board (7.18) is equipped with first articulated axle mount pad (7.3), the both ends of first articulated axle mount pad (7.3) are equipped with first articulated axle (7.2), first articulated axle (7.2) are adorned in first articulated seat (7.1) movably.

5. The sewage outlet plugging device for preventing odor from overflowing as claimed in claim 1, wherein: and the outer side wall of the core body (7) at the upper end of the water outlet (7.17) is provided with a concave water diversion groove (7.10).

6. The sewer inlet plugging device for preventing odor from overflowing, according to claim 2, is characterized in that: be equipped with narrow annular stair platform (7.5) wide down on the outer wall on core (7) top, the upper portion of annular stair platform (7.5) is equipped with second external screw thread (7.7), the lower part is equipped with first external screw thread (7.6), be equipped with first internal thread (7.9) on the inner wall on core (7) top.

7. The sewer inlet plugging device for preventing odor from overflowing, according to claim 2, is characterized in that: a first threaded hole (2.12) is formed in the middle of the upper cover (2.1), and a first water retaining ring (2.13) is arranged on the bottom surface of the upper cover (2.1) on the inner side of the water leakage hole (2.11); a second water retaining ring (2.21) is arranged on the bottom plate of the box body (2.2), the height difference between the end faces of the second water retaining ring (2.21) and the first water retaining ring (2.13) is H1, and H1 is larger than or equal to 3mm and smaller than or equal to 10 mm.

8. The odour overflow preventing sewer inlet plugging device according to claim 7, wherein: an annular filter screen (2.14) is arranged between the first water retaining ring (2.13) and the bottom plate of the box body (2.2).

9. The sewer inlet plugging device for preventing odor from overflowing, according to claim 2, is characterized in that: the second threaded hole (2.22) is formed in the inner side of a circular ring (2.23), the circular ring (2.23) protrudes downwards out of the lower end face of the bottom plate of the box body (2.2), and the upper end of the circular ring is connected with the bottom plate into a whole.

10. The sewer inlet plugging device for preventing odor from overflowing, according to claim 2, is characterized in that: the middle of upper cover (2.1) is equipped with first screw hole (2.12), be equipped with circular shape recess (2.15) in the middle of one side of upper cover (2.1), the inner wall of recess (2.15) is equipped with second internal thread (8.2).

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