CN111962641A

CN111962641A - Anti-reverse-water device for building drainage facility and assembly method

Info

Publication number: CN111962641A
Application number: CN202010854607.1A
Authority: CN
Inventors: 赵玉粉
Original assignee: Individual
Current assignee: Laiyang Architectural Design And Research Institute Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2020-11-20
Anticipated expiration: 2040-08-24
Also published as: CN111962641B

Abstract

The invention relates to the technical field of drainage facilities, in particular to an anti-reverse device for a drainage facility of a building and an assembly method. The device comprises a shell, a middle pipe and a plugging device, wherein the shell is embedded in the building ground and is communicated with a sewer pipe, the middle pipe is vertically arranged in the shell, and the lower end of the middle pipe is communicated with the sewer pipe and the outer side of the middle pipe; the plugging device comprises an upper plate body, a lower plate body and a plurality of plugging plates located between the upper plate body and the lower plate body, wherein the upper plate body is sleeved on the middle pipe and can be installed on the middle pipe or the shell in a vertically movable mode, the lower plate body is sleeved on the middle pipe and can be rotatably installed on the upper plate body, the upper plate body drives the lower plate body to rotate when moving vertically, and then the plugging plates are driven to stretch out or return to the inner parts of the upper plate body and the lower plate body. According to the invention, the blocking device is arranged, so that reverse backflow water can be blocked, and a reverse water return prevention effect is further realized; meanwhile, all the parts of the invention are installed in a nested way, so that the invention is convenient to assemble and disassemble and is convenient to clean.

Description

Anti-reverse-water device for building drainage facility and assembly method

Technical Field

The invention relates to the technical field of drainage facilities, in particular to an anti-reverse device for a drainage facility of a building and an assembly method.

Background

The drainage facility of the building has the task of discharging roof rainwater, snow water, domestic sewage, industrial wastewater and the like of the building to a drainage pipe network or a treatment network outside the building in time and smoothly without resistance, so that good environments for life, production, work and study are provided for people, and the normal operation of life and production is directly influenced by the quality of the drainage facility of the building. Most of the existing building drainage facilities have weak effect of preventing water from flowing back, and when large-flow water flows through the facilities, the water flows back reversely due to untimely drainage, so that the serious consequence of flooding indoors is caused. Meanwhile, the existing drainage device is not fast to install and detach, and is not convenient to use.

Disclosure of Invention

According to at least one defect of the prior art, the invention provides an anti-reverse device for a drainage facility of a building, which aims to solve the problems of poor anti-reverse effect and inconvenient assembly and disassembly of the existing drainage facility.

The invention relates to an anti-reverse device for a building drainage facility, which adopts the following technical scheme:

the device comprises a shell, a middle pipe and a plugging device, wherein the shell is embedded in the ground of a building, the upper end of the shell is open, and the lower end of the shell is communicated with a sewer pipe; the middle pipe is vertically arranged inside the shell, and the lower end of the middle pipe is communicated with the sewer pipe and the outer side of the middle pipe;

the plugging device comprises an upper plate body, a lower plate body and a plurality of plugging plates which are horizontally arranged, the upper plate body is sleeved on the middle pipe and can be installed on the middle pipe or the shell in a vertically moving mode, the lower plate body is sleeved on the middle pipe and can be rotatably arranged on the upper plate body, the inner wall of the shell is provided with a guide groove matched with the lower plate body, so as to drive the lower board body to rotate when the upper board body drives the lower board body to move up and down, the plugging plate is positioned between the upper plate body and the lower plate body and is movably connected with the upper plate body and the lower plate body, so that the plurality of plugging plates move towards the middle pipe when the lower plate body moves upwards and rotates to enable the plugging device to plug the gap between the middle pipe and the shell, when the lower plate body moves downwards and rotates, the plugging plates are far away from the middle pipe so as to enable the upper side and the lower side of the plugging device to be communicated;

the lower end of the plugging device is provided with a spring so that the plugging device is in an initial position, and when the plugging device is in the initial position, the plugging plate is in contact with the middle pipe.

Optionally, a fixed shell is arranged at the upper end of the housing, the fixed shell and the housing are coaxially arranged and are mounted on the inner wall of the housing, an annular groove is formed in the inner wall of the fixed shell, and the guide groove is formed in the arc-shaped peripheral surface of the annular groove;

the guide groove is spirally arranged, a first guide bulge protruding outwards is arranged on the outer circular surface of the lower plate body, and the first guide bulge is inserted into the guide groove;

the arc-shaped circumferential surface of the annular groove is also provided with a vertical guide groove, the outer circular surface of the upper plate body is provided with a second guide bulge protruding outwards, and the second guide bulge is positioned in the vertical guide groove.

Optionally, a first sliding column and a second sliding column are arranged on the blocking plate, the first sliding column and the second sliding column are coaxially arranged, and the first sliding column and the second sliding column are respectively located on the lower surface and the upper surface of the blocking plate;

the upper surface of the lower plate body is provided with first sliding chutes which are uniformly arranged along the circumferential direction of the lower plate body, the first sliding chutes are arc-shaped, and connecting lines of two ends of the first sliding chutes are intersected with the radial line direction of the lower plate body;

the lower surface of the upper plate body is provided with second sliding chutes which are uniformly arranged along the circumferential direction of the upper plate body, and the extending direction of the second sliding chutes is superposed with the radial line direction of the upper plate body;

the first sliding groove and the second sliding groove are the same as the blocking plates in number, the first sliding column is arranged inside the first sliding groove in a sliding mode, the second sliding column is arranged inside the second sliding groove in a sliding mode, so that when the lower plate body rotates, the first sliding groove drives the blocking plates to move along the second sliding groove, and then the blocking plates extend out of or retract into the space between the lower plate body and the upper plate body.

Optionally, the water-saving device further comprises a support frame for supporting the middle pipe, wherein the support frame comprises an installation part, a water passing part and a support part which are sequentially connected from inside to outside, the lower end surface inside the shell is provided with a connecting pipe which is upwards protruded and communicated with the sewer pipe, and the installation part is sleeved outside the connecting pipe;

the lower end of the middle pipe is connected with an inner pipe and an outer pipe which are coaxially arranged, the inner pipe is inclined inwards, the outer pipe is inclined outwards, the lower end of the inner pipe extends into the connecting pipe, and a gap is formed between the inner pipe and the connecting pipe;

the outer pipe is positioned on the supporting part, and the upper surface of the connecting pipe is higher than the contact surface of the outer pipe and the supporting part, so that water flow between the middle pipe and the shell forms a water seal at the lower end of the shell.

Optionally, the water seal device further comprises a water seal member and a water seal cover, the water seal member comprises a baffle plate and a water seal pipe, a through hole is formed in the center of the baffle plate, the water seal pipe is arranged on the upper surface of the baffle plate and communicated with the through hole, and the baffle plate is mounted on the inner wall of the middle pipe and is in sealing connection with the middle pipe;

the water seal cover comprises a housing, a water permeable part and a connecting part which are sequentially connected from inside to outside, the connecting part is installed at the upper end of the middle part pipe, the lower end of the housing is open and located above the water seal pipe and covers the water seal pipe, the opening diameter of the lower end of the housing is larger than the outer diameter of the water seal pipe, the lower end face of the housing is lower than the upper end face of the water seal pipe, so that water from the upper part of the middle part pipe is gathered on the baffle to form a water seal, and finally passes through the water seal pipe and a gap between the water seal cover flows into the water seal pipe and then flows into the lower side of the baffle.

Optionally, the plugging device further comprises an upper cover plate and a filter screen, the filter screen is located inside the shell and above the plugging device, the filter screen comprises an inner ring body, a pore plate and an outer ring body which are sequentially connected from inside to outside, the outer ring body is installed on the fixed shell, and the inner ring body is sleeved on the middle pipe;

the upper cover plate is installed at the upper end of the shell, a water hole is formed in the center of the upper cover plate, a plurality of water inlet grooves are uniformly distributed in the circumferential direction of the upper cover plate on the outer side of the water hole, the water inlet grooves are located above the plugging device, the water hole is communicated with the middle pipe, and the water hole can be connected with a special interface or a sealing cover.

Optionally, the lower end face of the upper cover plate and the upper end face of the shell are provided with a plurality of strong magnets, the strong magnets are uniformly arranged in the circumferential direction of the shell along the upper cover plate, are wedge-shaped and are located in one-to-one correspondence and opposite installation of the strong magnets of the upper cover plate and the lower cover plate.

Optionally, a gasket is arranged inside the fixed shell, and the gasket is mounted on the upper limiting surface and the lower limiting surface of the annular groove;

the upper end of the first sealing sleeve is connected with the inner wall of the fixed shell, the upper end of the second sealing sleeve is connected with the inner edge of the lower plate body, and the lower end of the second sealing sleeve is connected with the inner wall of the shell in a sliding mode.

Optionally, a boss is arranged at the upper end of the lower plate body, the first chute is arranged on the upper surface of the boss, an accommodating cavity with a downward opening is arranged at the lower end of the upper plate body, the second chute is positioned on the upper limiting surface of the accommodating cavity, and the boss and the plugging plate are both positioned inside the accommodating cavity;

a connecting bulge is arranged on the outer circular surface of the boss, a connecting groove is arranged on the inner circular surface of the accommodating cavity, and the connecting bulge is positioned in the connecting groove so as to enable the upper plate body and the lower plate body to be rotationally connected;

the upper plate body is provided with a first half part and a second half part, and the first half part and the second half part are detachably and fixedly connected.

A method for assembling an anti-drainback device of a building drainage facility comprises the following steps:

(1) embedding the shell in the ground of the building, and communicating a connecting pipe of the shell with the sewer pipe;

(2) sleeving the support frame outside the connecting pipe, and placing an outer pipe at the lower end of the middle pipe on the support frame;

(3) installing the gasket in an annular groove of the fixed shell, installing an assembled plugging device in the annular groove, installing a spring in the annular groove and below the plugging device, enabling the plugging device to be in abutting fit with an upper limiting surface of the annular groove under the elastic action of the spring, and installing the first sealing sleeve and the second sealing sleeve on the plugging device;

(4) placing the fixed shell with the sealing device installed in the shell;

(5) sleeving the filter screen on the outer side of the middle pipe, and mounting the filter screen on the fixed shell;

(6) installing the upper cover plate at the upper end of the shell, and rotating the upper cover plate to enable the surfaces of the first strong magnet positioned on the upper cover plate and the second strong magnet positioned on the shell to be completely attached;

(7) the special interface or the sealing cover can be selectively connected at the water passing hole of the upper cover plate.

The invention has the beneficial effects that: the invention relates to an anti-reverse water device for a building drainage facility, which is provided with a plugging device, wherein when water in a middle pipe reversely flows back, the plugging device tends to move upwards under the action of the reversely flowing water, so that a plugging plate tends to move towards the middle pipe, the plugging plate and the middle pipe are sealed more tightly, the reversely flowing water is prevented from flowing out of a shell, and a certain anti-reverse water effect is achieved.

According to the invention, through reasonable arrangement of the support frame, the shell and the middle pipe, a water seal is formed below the shell, meanwhile, the water seal piece and the water seal cover are arranged in the middle pipe to form a water seal in the middle pipe, and the two water seals are combined, so that odor and small insects can be effectively isolated, and indoor air cleanness is ensured.

In the invention, all the components are installed in a nesting mode, no additional fixation is needed, the installation and the disassembly are convenient, and the cleaning at any time is convenient.

Drawings

In order to illustrate more clearly the embodiments of the invention or the solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained by those skilled in the art without inventive exercise from these drawings, it being understood that these drawings are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a plugging state of a plugging device when a dedicated interface is externally connected according to the present invention;

FIG. 2 is a schematic structural view of the blocking device in a conducting state when the water holes and the water inlet grooves of the upper cover plate normally drain;

FIG. 3 is a schematic structural view of the plugging device in a plugging state when the sealing cap is connected according to the present invention;

FIG. 4 is an enlarged view of a portion B of FIG. 1;

FIG. 5 is an enlarged view of a portion A of FIG. 1;

FIG. 6 is a schematic view of the plugging state (with the plugging plate extended) of the plugging device of the present invention;

FIG. 7 is a schematic view of the conducting state (the plugging plate is retracted) of the plugging device according to the present invention;

figure 8 is an exploded view of the plugging device of the present invention;

FIG. 9 is a first half of the upper plate of the plugging device of the present invention;

FIG. 10 is a second half of the upper plate of the plugging device of the present invention;

FIG. 11 is a schematic view of the installation of a strong magnet according to the present invention;

FIG. 12 is a view showing the construction of the upper cover plate of the present invention;

FIG. 13 is a structural view of a strong magnet according to the present invention;

FIG. 14 is a view showing the construction of a filter screen according to the present invention;

FIG. 15 is a view showing the structure of a water seal cover according to the present invention;

FIG. 16 is a view showing the structure of the stand according to the present invention;

fig. 17 is a development view of the guide groove and vertical guide groove structure of the present invention.

In the figure: 1. a dedicated interface; 21. an upper cover plate; 211. fixing grooves; 212. a water inlet groove; 213. water passing holes; 22. strong magnets; 23. a housing; 231. a connecting pipe; 24. a support frame; 241. an installation part; 242. a water passing part; 243. a support portion; 25. a middle tube; 26. a water seal; 27. a water enclosure; 271. a housing; 272. a water permeable section; 273. a connecting portion; 3. building a ground; 4. a sewer pipe; 511. a guide groove; 512. a vertical guide groove; 52. a first seal cartridge; 53. a spring; 54. a lower plate body; 541. a first guide projection; 542. a first chute; 543. a connecting projection; 55. a plugging plate; 551. a first traveler; 552. a second strut; 56. an upper plate body; 561. a second guide projection; 562. a second chute; 563. a connecting groove; 564. a first half portion; 5641. splicing the grooves; 5642. a counter bore; 565. a second half; 5651. splicing the bulges; 57. a gasket; 58. a second seal cartridge; 59. a stationary case; 6. a filter screen; 7. and (7) sealing the cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 17, the anti-reverse-water device for the drainage facility of the building comprises a shell 23, a middle pipe 25 and a blocking device, wherein the shell 23 is embedded in the ground 3 of the building, the upper end of the shell 23 is open, and the lower end of the shell 23 is communicated with a sewer pipe 4; the middle pipe 25 is vertically arranged in the shell 23, and the lower end of the middle pipe 25 is communicated with the outer sides of the downcomer 4 and the middle pipe 25.

The plugging device comprises an upper plate body 56, a lower plate body 54 and a plurality of plugging plates 55 which are horizontally arranged, wherein the upper plate body 56 is sleeved on the middle pipe 25 and can be vertically moved and arranged on the middle pipe 25 or the shell 23, the lower plate body 54 is sleeved on the middle pipe 25 and the lower plate body 54 is rotatably arranged on the upper plate body 56, the inner wall of the shell 23 is provided with a guide groove 511 matched with the lower plate body 54, so as to drive the lower plate body 54 to rotate when the upper plate body 56 drives the lower plate body 54 to move up and down, the blocking plate 55 is positioned between the upper plate body 56 and the lower plate body 54 and is movably connected with the upper plate body 56 and the lower plate body 54, to move the plurality of blocking plates 55 toward the middle pipe 25 when the lower plate body 54 is moved upward and rotated to cause the blocking means to block the gap between the middle pipe 25 and the housing 23, and the plurality of blocking plates 55 are moved away from the middle tube 25 to communicate the upper and lower sides of the blocking device when the lower plate body 54 is moved downward and rotated.

The lower end of the plugging device is provided with a spring 53 to keep the plugging device in an initial position, and in the initial position, a plugging plate 55 is in contact with the middle pipe 25, so that the lower side of the plugging device, the middle pipe 25 and the shell 23 jointly define a water return buffer space.

As shown in fig. 1, when a large flow of water passes through the middle pipe 25 above the middle pipe 25, if the water discharge is too large, the lower end of the middle pipe 25 has water to reversely flow back to the inside of the casing, the plugging device has a tendency of upward movement under the action of the reversely flowing water, so that the plugging plate 55 has a tendency of extending out, and further the plugging plate 55 is more closely contacted with the middle pipe 25, the water-reversing space is more reliably sealed, and the effect of preventing water reversing is achieved.

As shown in fig. 2, when the water flow above the middle pipe is small or no water flow, the water flow is not enough to cause reverse water, and simultaneously, the water flow passes between the middle pipe and the shell, under the impact of the water flow between the middle pipe and the shell, the blocking device overcomes the elastic force of the spring 53 to move downwards, so that the blocking plate 55 retracts, the upper side and the lower side of the blocking device are communicated, and the drainage is provided with normal drainage.

The upper end of the housing 23 is provided with a fixing shell 59, and the fixing shell 59 is coaxially arranged with the housing 23 and is mounted on the inner wall of the housing 23. The arrangement of the fixing shell 23 can facilitate the installation of the plugging device. An annular groove is formed on the inner wall of the fixed casing 59, the guide groove 511 is formed on the arc-shaped circumferential surface of the annular groove, the guide groove 511 is spirally formed, a first guide protrusion 541 protruding outward is formed on the outer circumferential surface of the lower plate body 54, and the first guide protrusion 541 is inserted into the guide groove 511. The arc-shaped circumferential surface of the annular groove is further provided with a vertical guide groove 512, the outer circumferential surface of the upper plate body 56 is provided with a second guide protrusion 561 protruding outwards, and the second guide protrusion 561 is located in the vertical guide groove 512. As shown in fig. 17, the upper plate 56 moves up and down under the guiding action of the vertical guide groove 512 to drive the lower plate 54 to move up and down, and the lower plate 54 rotates under the guiding action of the spiral guide groove 511 during moving up and down.

As shown in fig. 8 and 9, the blocking plate 55 is provided with a first sliding column 551 and a second sliding column 552, the first sliding column 551 and the second sliding column 552 are coaxially arranged, and the first sliding column 551 and the second sliding column 552 are respectively located on the lower surface and the upper surface of the blocking plate 55. The upper surface of the lower plate body 54 is provided with first sliding grooves 542, the first sliding grooves 542 are uniformly arranged along the circumferential direction of the lower plate body 54, the first sliding grooves 542 are arc-shaped, and the connecting line of the two ends of the first sliding grooves 542 intersects with the radial line direction of the lower plate body 54. The lower surface of the upper plate body 56 is provided with second sliding grooves 562, the second sliding grooves 562 are uniformly arranged along the circumferential direction of the upper plate body 56, and the extending direction of the second sliding grooves 562 coincides with the radial line direction of the upper plate body 56. The number of the first sliding grooves 542 and the second sliding grooves 562 is the same as that of the blocking plates 55, the first sliding posts 551 are slidably disposed inside the first sliding grooves 542, and the second sliding posts 552 are slidably disposed inside the second sliding grooves 562, so that when the lower plate 54 rotates, the first sliding grooves 542 drive the blocking plates 55 to move along the second sliding grooves 562, and further the blocking plates 55 extend out of or retract into the space between the lower plate 54 and the upper plate 56. In other embodiments, the second traveler may be configured as a square post.

The anti-reverse-water device of the building drainage facility further comprises a support frame 24 for supporting the middle pipe 25, as shown in fig. 16, the support frame 24 comprises a mounting part 241, a water passing part 242 and a supporting part 243 which are sequentially connected from inside to outside, the lower end surface inside the shell 23 is provided with a connecting pipe 231 which is upwards protruded and communicated with the sewer pipe 4, and the mounting part 241 is sleeved outside the connecting pipe 231. The lower end of the middle tube 25 is connected with an inner tube and an outer tube which are coaxially arranged, the inner tube is inclined inwards, the outer tube is inclined outwards, the lower end of the inner tube extends into the connecting tube 231, and a gap is formed between the inner tube and the connecting tube 231; the outer pipe is positioned on the support portion 243, and the upper surface of the connection pipe 231 is higher than the contact surface of the outer pipe and the support portion, so that the water flow from between the middle pipe 25 and the housing 23 forms a water seal at the lower end of the housing 23. Further, the upper end of the support portion 243 has a circular support base, the outer circumferential surface of the circular support base is disposed to be inclined, the upper end of the outer circumferential surface is close to the center of the support frame 24 with respect to the lower end, and the outer tube of the lower end of the middle tube 25 is inclined at the same angle as the outer circumferential surface of the circular support base, so that the inner circumferential surface of the outer tube is attached to the outer circumferential surface of the circular support base. A plurality of connecting ribs are connected between the mounting portion 241 and the supporting portion 243, and are uniformly distributed along the circumferential direction of the supporting frame 24 to form a water passing portion 242.

The water seal 26 comprises a baffle plate and a water seal pipe, the center of the baffle plate is provided with a through hole, the water seal pipe is arranged on the upper surface of the baffle plate and is communicated with the through hole, and the baffle plate is arranged on the inner wall of the middle pipe 25 and is connected with the middle pipe 25 in a sealing way. As shown in fig. 15, the water seal cover 27 includes a housing 271, a water permeable portion 272 and a connecting portion 273 which are connected in sequence from inside to outside, the connecting portion 273 is installed at the upper end inside the middle pipe 25, the lower end of the housing 271 is open and located above the water seal pipe and covers the water seal pipe, the opening diameter of the lower end of the housing 271 is larger than the outer diameter of the water seal pipe, and the lower end surface of the housing 271 is lower than the upper end surface of the water seal pipe, so that water from the upper part of the middle pipe 25 is gathered on the baffle plate to form a water seal, and finally flows into the water seal pipe through the gap between the water seal pipe and the water seal cover 27, and then. Specifically, the inner wall of the middle pipe is provided with a supporting bulge, and the baffle abuts against the upper side of the supporting bulge. The height of housing 271 is less than the height of connecting portion 273, is connected with the connecting plate of a plurality of vertical settings between housing 271 and the connecting portion 273, and a plurality of connecting plates are evenly arranged along the circumferencial direction of water seal cover 27 in order to form water-permeable portion 272.

The anti-reverse device of the building drainage facility of the invention also comprises an upper cover plate 21 and a filter screen 6, wherein the upper cover plate 21 is arranged at the upper end of the shell 23, as shown in figure 12, the center of the upper cover plate 21 is provided with a water through hole 213, the outer side of the water through hole 213 is provided with a plurality of water inlet grooves 212 which are uniformly distributed along the circumferential direction of the upper cover plate 21, the water inlet grooves 212 are positioned above the plugging device, and the water through hole 213 is communicated with the middle pipe 25. As shown in fig. 14, the filter screen 6 is located inside the casing 23 and above the plugging device, the filter screen 6 includes an inner ring body, a perforated plate and an outer ring body which are connected in sequence from inside to outside, the outer ring body is mounted on the fixed casing 59, and the inner ring body is sleeved on the middle pipe 25. The filter screen 6 can filter the water from the water inlet tank and can support the middle pipe 25 to a certain extent. The water through hole 213 is provided with an internal thread so that the water through hole 213 can be connected with the special interface 1 or the sealing cover 7, and the special interface 1 can be used for connecting a washing machine or other devices needing large-flow water discharge. When the sealing cover 7 is connected, if the sewer pipe 4 is exposed to water overflow, the water flow to the plugging device is blocked, and a certain degree of water overflow prevention is achieved, as shown in fig. 3.

As shown in fig. 11, 12 and 13, the lower end surface of the upper cover plate 21 and the upper end surface of the housing 23 are both provided with a plurality of strong magnets 22, the plurality of strong magnets 22 are uniformly arranged along the circumferential direction of the upper cover plate 21 and the housing 23, the strong magnets 22 are wedge-shaped, and the strong magnets 22 located on the upper cover plate 21 and the lower cover plate are installed in a one-to-one correspondence and opposite manner. Specifically, the lower end surface of the upper cover plate 21 is uniformly distributed with a plurality of fixing grooves 211 along the circumferential direction of the upper cover plate 21, the upper end surface of the housing 23 is provided with mounting grooves corresponding to the fixing grooves 211, and the bottom of the strong magnet 22 is mounted inside the corresponding fixing grooves 211 and the mounting grooves. Set strong magnet 22 to the wedge, rotatory upper cover plate 21 during the installation, make on upper cover plate 21 and casing 23 relative two strong magnets 22's that set up the wedge surface laminate completely can, during the dismantlement, counter-rotating upper cover plate 21, two relative strong magnets 22's that set up wedge surface staggers gradually and breaks away from, and strong magnet 22's suction reduces gradually, produces the clearance between upper cover plate 21 and the casing 23 simultaneously, conveniently dismantles upper cover plate 21.

In the present embodiment, the inside of the stationary case 59 is provided with the washers 57, and the washers 57 are mounted to the upper and lower defining surfaces of the annular groove. The plugging device is provided with a first sealing sleeve 52 and a second sealing sleeve 58, the lower end of the first sealing sleeve 52 is connected to the inner edge of the upper surface of the upper plate body 56, the upper end of the first sealing sleeve 52 is connected to the inner wall of the fixed shell 59, the upper end of the second sealing sleeve 58 is connected to the inner edge of the lower surface of the lower plate body 54, and the lower end of the second sealing sleeve 58 is slidably connected to the inner wall of the shell 23. The provision of the first and second sealing

sleeves

52, 58 seals against annular grooves in the stationary housing 59, making the movement of the closure device more reliable and extending the useful life of the invention.

As shown in fig. 8, 9 and 10, in the present embodiment, the upper end of the lower plate body 54 has a boss, the first sliding groove 542 is disposed on the upper surface of the boss, the lower end of the upper plate body 56 has a receiving cavity with a downward opening, the second sliding groove 562 is disposed on the upper limiting surface of the receiving cavity, and the boss and the blocking plate 55 are both disposed inside the receiving cavity. The outer circular surface of the boss is provided with a connecting protrusion 543, the inner circular surface of the accommodating cavity is provided with a connecting groove 563, and the connecting protrusion 543 is located in the connecting groove 563, so that the upper plate 56 and the lower plate 54 are rotatably connected. The upper plate 56 has a first half 564 and a second half 565, the first half 564 and the second half 565 being removably and fixedly coupled. Specifically, a fitting groove 5641 is provided on a vertical end surface of the first half 564, a counterbore 5462 penetrating the fitting groove 5641 is provided on an upper end surface of the first half 564, a fitting projection 5651 corresponding to the fitting groove 5641 is provided on a vertical end surface of the second half 565, the fitting projection 5651 is positioned in the fitting groove 5641, and the first half 564 and the second half 565 are fitted into the upper plate body 56 by inserting a screw into the counterbore 5642. The upper plate body 56 is arranged into a split structure, so that the plugging plate 55 is convenient to install.

The invention relates to an assembly method of an anti-reverse device of a building drainage facility, which comprises the following steps:

(1) the shell 23 is embedded in the building ground 3, and the connecting pipe 231 of the shell 23 is communicated with the sewer pipe 4;

(2) sleeving the support frame 24 outside the connecting pipe 231, and placing the outer pipe at the lower end of the middle pipe 25 on the support frame 24;

(3) installing a gasket 57 in an annular groove of a fixed shell 59, installing the assembled plugging device in the annular groove, installing a spring 53 in the annular groove and below the plugging device, enabling the plugging device to be in abutting fit with an upper limiting surface of the annular groove under the elastic force of the spring 53, and installing a first sealing sleeve 52 and a second sealing sleeve 58 on the plugging device;

(4) placing the fixed shell 59 with the sealing device installed inside the shell 23;

(5) the filter screen 6 is sleeved outside the middle pipe 25, and the filter screen 6 is arranged on the fixed shell 59;

(6) mounting an upper cover plate 21 on the upper end of a shell 23, and rotating the upper cover plate 21 to enable the surfaces of a first strong magnet 22 positioned on the upper cover plate 21 and a second strong magnet 22 positioned on the shell 23 to be completely attached;

(7) the special interface 1 or the sealing cover 7 can be selectively connected at the water passing hole of the upper cover plate 21.

With the above embodiment, the use principle and the working process of the present invention are as follows: the invention is completed according to the steps. When a large flow of water flows through the middle pipe 25 at the water through hole 213 and the water flows back at the lower end of the middle pipe 25 due to insufficient drainage, the blocking plate 55 contacts the middle pipe 25, and the blocking device prevents the water flowing back reversely from flowing out of the shell 23. When water flows into the water inlet groove 212, the plugging plate 55 retracts into the upper plate body 56 and the upper plate body 54 under the impact of the water flow, and the upper side and the lower side of the plugging device are communicated to normally drain water.

The lower end of the shell 23 and the inside of the middle pipe 25 form water seals which can isolate odor and small insects and ensure clean air in the building.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a building drainage facility prevents anti-water installation which characterized in that: the device comprises a shell, a middle pipe and a plugging device, wherein the shell is embedded in the ground of a building, the upper end of the shell is open, and the lower end of the shell is communicated with a sewer pipe; the middle pipe is vertically arranged inside the shell, and the lower end of the middle pipe is communicated with the sewer pipe and the outer side of the middle pipe;

2. A building drain facility anti-drainback apparatus as claimed in claim 1, wherein: the upper end of the shell is provided with a fixed shell, the fixed shell and the shell are coaxially arranged and are arranged on the inner wall of the shell, the inner wall of the fixed shell is provided with an annular groove, and the guide groove is arranged on the arc-shaped peripheral surface of the annular groove;

3. A building drain facility anti-drainback apparatus as claimed in claim 2, wherein: the blocking plate is provided with a first sliding column and a second sliding column which are coaxially arranged, and the first sliding column and the second sliding column are respectively positioned on the lower surface and the upper surface of the blocking plate;

4. A building drain facility anti-drainback apparatus as claimed in claim 1, wherein: the support frame comprises an installation part, a water passing part and a support part which are sequentially connected from inside to outside, the lower end surface inside the shell is provided with a connecting pipe which is upwards protruded and communicated with the sewer pipe, and the installation part is sleeved outside the connecting pipe;

5. A building drainage facility anti-drainback device as claimed in claim 4, wherein: the water seal device comprises a baffle and a water seal cover, wherein the water seal comprises a through hole in the center of the baffle, the water seal pipe is arranged on the upper surface of the baffle and communicated with the through hole, and the baffle is arranged on the inner wall of the middle pipe and is in sealing connection with the middle pipe;

the water seal cover includes housing, water-permeable portion and connecting portion that connect gradually from inside to outside, connecting portion install in middle part inside upper end, the housing lower extreme is uncovered and is located the top of water seal pipe covers the water seal pipe, housing lower extreme opening diameter is greater than the external diameter of water seal pipe, just the lower terminal surface of housing is less than the up end of water seal pipe, so that come from the water of middle part pipe top is in the gathering forms the water seal on the baffle, finally passes through the water seal pipe with clearance between the water seal cover flows in the water seal pipe, the back flows in the downside of baffle.

6. A building drain facility anti-drainback apparatus as claimed in claim 1, wherein: the filter screen is positioned in the shell and above the plugging device, the filter screen comprises an inner ring body, a pore plate and an outer ring body which are sequentially connected from inside to outside, the outer ring body is arranged on the fixed shell, and the inner ring body is sleeved on the middle pipe;

7. The building drainage facility anti-reverse-watering device according to claim 6, wherein: the lower terminal surface of upper cover plate with the up end of casing all is provided with a plurality of strong magnets, the strong magnet is followed the upper cover plate with the circumferencial direction of casing is evenly arranged, the strong magnet is the wedge, and is located the upper cover plate with the strong magnet one-to-one of lower apron and relative installation.

8. A building drain facility anti-drainback apparatus as claimed in claim 2, wherein: the inner part of the fixed shell is provided with a gasket which is arranged on the upper limiting surface and the lower limiting surface of the annular groove;

9. A building drain facility anti-drainback apparatus as claimed in claim 3, wherein: the upper end of the lower plate body is provided with a boss, the first sliding groove is arranged on the upper surface of the boss, the lower end of the upper plate body is provided with an accommodating cavity with a downward opening, the second sliding groove is positioned on the upper limiting surface of the accommodating cavity, and the boss and the plugging plate are both positioned in the accommodating cavity;

10. A method of assembling an anti-drainback device for a building drain facility according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

(4) placing the fixed shell with the sealing device installed in the shell;