CN210197579U

CN210197579U - Anti-backflow ventilating shaft

Info

Publication number: CN210197579U
Application number: CN201921020883.7U
Authority: CN
Inventors: Zhiyong Su; 宿志勇; Lihua Chen; 陈丽花; Yuanjie Fang; 方渊傑
Original assignee: Xiamen Tefang International Design Co Ltd
Current assignee: Xiamen Tefang International Design Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-03-27
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a prevent flowing backward ventilating shaft, underground building ventilation technical field. Its technical essential includes the ventilation pipe, the ventilation pipe upper end is provided with the ventilation case, the ventilation case includes curb plate and bottom plate, the vent has all been seted up to the curb plate, the ventilation pipe lower extreme is connected with the fan room, a serial communication port, the upper end of ventilation pipe extends to get into in the ventilation case and is located the bottom plate top, the ventilation pipe is provided with the bending section between ventilation case and fan room, the bending section is including the low level section that is close the ventilation case and the high level section that links to each other and is close the fan room with the low level section, the high level section rotates and is connected with the barrier plate that is used for controlling high level section pipeline break-make state, and when the fan was opened, the barrier plate is jack-up under the wind-force effect, and the high level section pipeline is in the intercommunication state, the utility model has the advantages of can prevent ponding pouring to.

Description

Anti-backflow ventilating shaft

Technical Field

The utility model belongs to the technical field of underground building ventilation structure, more specifically says, it relates to a prevent flowing backward ventilating shaft.

Background

A ventilation shaft is a ventilation and exhaust device for underground buildings, and is generally a vertical upward passage structure. One end of the ventilation shaft is connected with the space of the underground building, the other end of the ventilation shaft is communicated with the ground, an exhaust fan with a certain specification is arranged in the ventilation shaft, and the gas in the underground building is discharged into the atmosphere by utilizing the pumping force of the exhaust fan and the natural pulling force of the ventilation shaft.

The utility model discloses a chinese utility model patent that is CN205476321U announces a ventilating shaft structure with rain-proof tripe, it includes the ventilating shaft, the below of basement fan house top surface is located to the ventilating shaft lower part and communicates in basement fan house, ventilating shaft upper portion protrusion in basement fan house top surface upwards sets up, the upper portion of ventilating shaft is enclosed by a plurality of lateral walls and a roof and closes and form, is equipped with the vent that communicates in external environment on at least one of them lateral wall, the ventilating shaft structure is still including enclosing and closing the outside protective wall of vent, the last rain-proof tripe that is equipped with of protective wall, rain-proof tripe with the vent position is relative, just the area of rain-proof tripe is greater than correspondingly the vent area.

Similar to foretell ventilating shaft structure among the prior art, it has solved the problem that the rainwater got into the ventilating shaft, but when external ponding was too much, ponding was easy to flow backward and is got into underground construction, has certain potential safety hazard, consequently still remains the space of improving.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent flowing backward ventilating shaft, it can prevent that ponding from flowing backward to underground building in, promotes ventilating shaft's waterproof performance.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a prevent flowing backward ventilation shaft, includes the ventilation pipe, the ventilation pipe upper end is provided with the ventilation case, the ventilation case includes curb plate and bottom plate, the vent has all been seted up to the curb plate, the ventilation pipe lower extreme is connected with the fan room, the upper end of ventilation pipe extends to get into the ventilation incasement and is located the bottom plate top, the ventilation pipe is provided with the bending segment between ventilation case and fan room, the bending segment is including the low level section that is close the ventilation case and the high level section that links to each other and be close the fan room with the low level section, the high level section rotates and is connected with the barrier plate that is used for controlling high level section pipeline break-make state, and when the fan was opened, the barrier plate was jacked under the wind-force effect, and.

By adopting the technical scheme, when accumulated water outside the ventilation box enters the ventilation box, the ventilation pipe above the bottom plate and the accumulated water still have a certain height difference, and a certain blocking effect on the accumulated water can be formed; simultaneously, the ventilation pipe is sealed to the barrier plate under the normal condition, and after the fan room began work, gas broke away the barrier plate, along ventilation pipe and ventilation case discharge to the external world, after ponding submerged the upper end entering ventilation pipe of ventilation pipe, assemble in the low level section of bending section, and rise gradually to the high level section, the barrier plate seals the ventilation pipe under the effect of ponding this moment, forms the separation once more to ponding, prevents that it from following the ventilation pipe and getting into the fan room.

From this, through ventilation pipe, bending segment and barrier plate, can prevent that ponding from flowing backward to the fan room in, promote the waterproof performance of ventilation shaft.

Furthermore, the blocking plate is obliquely arranged, the lower end of the blocking plate faces the lower section, and the higher end of the blocking plate is hinged to the inner wall of the upper section.

Through adopting above-mentioned technical scheme, slope setting and low side can seal the ventilation pipe under self action of gravity towards the low level barrier plate of section, and can be washed out when the fan room begins to work and accomplish the rebound once more after exhausting, guarantees the leakproofness of ventilation pipe to can completely cut off ponding entering fan room when ponding gets into the bending section, promote the waterproof performance of ventilation shaft.

Furthermore, a sealing sleeve which is embedded with the inner wall of the high-position section and is provided with an opening is arranged in the high-position section, and the high end and the low end of the barrier plate are respectively attached to one side of the sealing sleeve.

Through adopting above-mentioned technical scheme, the seal cover has good sealed water proof's performance, and its open-ended seting up can satisfy normal exhaust ventilation needs, and when ponding got into the ventilation pipe, can with the cooperation of barrier plate, further promote the sealed water proof performance of ventilation pipe.

Furthermore, one side of the blocking plate, which is far away from the sealing sleeve, is provided with a balancing weight.

Through adopting above-mentioned technical scheme, the setting of balancing weight can increase the weight of barrier plate to make the barrier plate can fall back naturally after opening, keep the leakproofness of ventilation pipe better.

Furthermore, the vent rotates along the direction of height in proper order and is connected with a plurality of flabellums, one side that the flabellum is located ventilation box inside is provided with the buoyancy piece.

By adopting the technical scheme, under the normal condition, under the action of the self gravity of the buoyancy block, one end of the fan blade in the ventilation box falls, so that the other end of the fan blade keeps a raised shape, and the ventilation opening is in an open state; when ponding rises to the flabellum of bottommost, the buoyancy piece rises along with the water level to make the flabellum upset, all flabellums all overturn the back, the vent is sealed, forms the separation to external ponding, prevents that it from getting into in the ventilation case.

Furthermore, one end of the ventilation pipe close to the ventilation box is provided with a tapered section, and an opening at one end of the tapered section close to the top of the ventilation box is gradually reduced.

Through adopting above-mentioned technical scheme, the setting of convergent section can increase the water storage volume in the ventilation box, makes more ponding held back between ventilation box and convergent section, reduces the volume that gets into the ponding in the convergent section.

Further, the opening part of convergent section is provided with the buoyancy lid, buoyancy lid lower extreme is connected with and is used for sealing convergent section open-ended closing plate, the upper end of buoyancy lid is provided with the connecting portion that extend to convergent section outer wall, the tip of connecting portion is provided with the buoyancy portion that light material made, just buoyancy portion is less than the closing plate in the ascending position of vertical side.

Through adopting above-mentioned technical scheme, the setting of buoyancy lid, buoyancy portion and closing plate can make buoyancy portion drive the buoyancy lid and rise after ponding rises to the position of buoyancy portion, and then drives the closing plate and rise, and before ponding reachs the convergent section, buoyancy portion has driven the opening of closing plate with the convergent section and has sealed completely, can prevent from ponding to get into in the ventilation pipe from this.

Further, the inner wall of convergent section is provided with the spout, the both ends of closing plate are provided with the slider that slides in the spout, and when the slider slided to the highest position of spout, the opening of convergent section is sealed to the closing plate.

Through adopting above-mentioned technical scheme, the setting of spout and slider can make its limiting displacement of closing plate keep sliding on vertical direction all the time, prevents that the opening that makes the convergent section after the closing plate changes the position from producing the gap to lead to ponding to get into in the ventilation pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) through the ventilation pipe, the bending section and the barrier plate, accumulated water can be prevented from flowing backwards into the ventilation machine room, and the waterproof performance of the ventilation shaft is improved;

(2) by arranging the sealing sleeve, the sealing and water-proof performance of the ventilation pipe can be further improved by utilizing the good sealing and water-proof performance of the sealing sleeve and matching with the barrier plate;

(3) through setting up the convergent section, can increase the water storage volume in the ventilation case, make more ponding held back between ventilation case and convergent section, reduce the volume that gets into the ponding in the convergent section.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic sectional view of the present embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a partial sectional view of the active state of the prominent barrier of this embodiment.

Reference numerals: 1. a ventilator room; 2. a ventilation box; 3. a vent pipe; 21. a side plate; 22. a base plate; 23. a top plate; 24. a vent; 25. a fan blade; 31. a curved section; 32. a tapered section; 251. a rotating shaft; 252. a buoyancy block; 311. a low-order section; 312. a high-order section; 313. a blocking plate; 314. sealing sleeves; 321. a buoyant cover; 322. positioning blocks; 323. positioning a groove; 324. a connecting rod; 325. a closing plate; 326. a connecting portion; 327. a buoyancy section; 328. a guide rod; 329. a guide hole; 3131. a balancing weight; 3141. and (4) opening.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

A backflow-preventing ventilating shaft comprises a ventilating pipe 3 with a rectangular cross section, a ventilating box 2 is connected to the upper end of the ventilating pipe 3, the ventilating box 2 is formed by enclosing four side plates 21, a bottom plate 22 and a top plate 23, each side plate 21 is provided with a ventilating opening 24, a plurality of fan blades 25 are arranged side by side along the vertical direction of the ventilating opening 24 through a rotating shaft 251, the fan blades 25 can rotate along the side walls of two sides of the ventilating opening 24 around the rotating shaft 251, the lower end of the ventilating pipe 3 is connected with a ventilating machine room 1, the upper end of the ventilating pipe 3 extends into the ventilating box 2 and is positioned above the bottom plate 22, an S-shaped bending section 31 is fixed between the ventilating box 2 and the ventilating machine room 1 by the ventilating pipe 3, the bending section 31 comprises a low-level section 311 close to the ventilating box 2 and a high-level section 312 connected with the low-level section 311 and close to the ventilating machine room 1, a blocking plate 313 used for controlling the on-off state of, when the fan is started, the blocking plate 313 is jacked up under the action of wind power, and the pipeline of the high-level section 312 is in a communicated state.

As shown in fig. 2, the blocking plates 313 are distributed obliquely, and their lower ends face the lower section 311. Obliquely distributed and low end towards low level section 311's barrier plate 313, can seal ventilation pipe 3 under self action of gravity, and can be washed out when fan room 1 begins to work and accomplish the back fall once more after exhausting, guarantee ventilation pipe 3's leakproofness to can completely cut off ponding entering fan room 1 when ponding gets into curved segment 31, promote the waterproof performance of ventilation shaft.

As shown in fig. 2, a sealing sleeve 314 fitted with an opening 3141 is mounted around the inner wall of the high-level section 312, and the sealing sleeve 314 is obliquely distributed, and the high end and the low end of the blocking plate 313 are respectively attached to one side of the sealing sleeve 314. The sealing sleeve 314 has good sealing and water-stopping performance, the opening 3141 of the sealing sleeve can meet the requirement of normal exhaust and ventilation, and when accumulated water enters the ventilation pipe 3, the sealing sleeve can be matched with the blocking plate 313 to further improve the sealing and water-stopping performance of the ventilation pipe 3.

As shown in fig. 2, a spherical weight block 3131 is fixed to a bottom end of a side of the blocking plate 313 away from the sealing sleeve 314, and the weight of the blocking plate 313 can be increased by the weight block 3131, so that the blocking plate 313 can naturally fall back after being opened, and the sealing performance of the ventilation tube 3 is better maintained.

As shown in fig. 3, a spherical buoyancy block 252 is fixed to one side of fan blade 25 inside ventilation box 2. Under normal conditions, under the action of the self gravity of the buoyancy block 252, one end of the fan blade 25 positioned in the ventilation box 2 falls, so that the other end of the fan blade 25 keeps a raised shape, and the ventilation opening 24 is in an open state; when ponding rises to the flabellum 25 of bottommost, buoyancy piece 252 rises along with the water level to make flabellum 25 upset, all flabellums 25 are all overturned the back, and vent 24 is sealed, forms the separation to external ponding, prevents that it from getting into in the ventilation case 2.

As shown in fig. 2 and 4, the one end of ventilation pipe 3 near ventilation box 2 is extended with convergent section 32, and one end opening 3141 that convergent section 32 is close to ventilation box 2 top diminishes gradually, and it is wholly frustum form, can increase the water storage volume in ventilation box 2 through convergent section 32, makes more ponding be held back between ventilation box 2 and convergent section 32, reduces the volume that gets into the ponding in the convergent section 32.

As shown in fig. 4, a positioning groove 323 is formed at the opening 3141 of the tapered section 32, a buoyancy cover 321 is installed on the opening 3141, positioning blocks 322 engaged with the positioning groove 323 extend from two ends of the buoyancy cover 321, and the lower end of the buoyancy cover 321 is connected with a closing plate 325 for closing the opening 3141 of the tapered section 32 through a connecting rod 324, the upper end of the buoyancy cover 321 is fixed with a connecting part 326 extending to the outer wall of the tapered section 32, the end of the connecting part 326 is provided with a buoyancy part 327 made of light material, and the position of the buoyancy part 327 in the vertical direction is lower than the closing plate 325, after the accumulated water rises to the position of the buoyancy portion 327 through the buoyancy cover 321, the buoyancy portion 327 and the closing plate 325, the buoyancy portion 327 drives the buoyancy cover 321 to rise, and then the closing plate 325 is driven to rise, and before the accumulated water reaches the tapered section 32, the buoyancy portion 327 drives the closing plate 325 to completely close the opening 3141 of the tapered section 32, so that the accumulated water can be prevented from entering the ventilation pipe 3.

As shown in fig. 4, a guide rod 328 is fixed on the inner wall of the tapered section 32 along the vertical direction, guide holes 329 for the guide rod 328 to pass through are symmetrically formed at two ends of the closing plate 325, and when the closing plate 325 slides to the highest position of the guide rod 328, the closing plate 325 closes the opening 3141 of the tapered section 32, the closing plate 325 can be kept sliding in the vertical direction all the time by the limiting function of the guide rod 328 and the guide holes 329, so that the opening 3141 of the tapered section 32 is prevented from generating a gap after the position of the closing plate 325 is changed, and accumulated water enters the vent pipe 3.

The utility model discloses a working process and beneficial effect as follows: referring to fig. 5, the blocking plate 313 is normally in a state of closing the sealing sleeve 314, when the ventilation machine room is in operation, the blocking plate 313 is lifted by wind pressure, and the opening 3141 is opened, so that the wind can flow out from the ventilation pipe 3; when water accumulates outside the ventilation box 2, the accumulated water firstly enters the ventilation box 2 and is trapped between the tapered section 32 and the ventilation box 2 under the blocking of the tapered section 32, and when the water level rises to the position of the opening 3141 of the tapered section 32, the buoyancy part 327 drives the closing plate 325 to rise, and finally the opening 3141 of the tapered section 32 is closed, so that the accumulated water is prevented from entering the ventilation pipe 3; when the water level continues to rise to the position of the fan blades 25, the buoyancy block 252 on the fan blades 25 rises along with the water level, and the plurality of fan blades 25 gradually turn over to close the ventilation opening 24 to prevent accumulated water from entering the ventilation box 2; when accumulated water carelessly enters the ventilation pipe 3, the bent section 31 can form obstruction on the accumulated water again, so that the accumulated water is intercepted at the position of the low section 311; the blocking plate 313 is always in a state of being attached to the sealing sleeve 314 under the action of the balancing weight 3131, and when the water level rises to the high-level section 312, water further exerts a pressing effect on the blocking plate 313, so that the blocking plate is further fastened with the sealing sleeve 314, the ventilation pipe 3 is sealed, and further water penetration is prevented.

In conclusion, through ventilation pipe 3, curved section 31 and barrier plate 313, can prevent that ponding from flowing backward to ventilation machine room 1 in, promote the waterproof performance of ventilation shaft.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The anti-backflow ventilating shaft comprises a ventilating pipe (3), a ventilating box (2) is arranged at the upper end of the ventilating pipe (3), the ventilating box (2) comprises side plates (21) and a bottom plate (22), ventilating openings (24) are formed in the side plates (21), a ventilating machine room (1) is connected to the lower end of the ventilating pipe (3), the anti-backflow ventilating shaft is characterized in that the upper end of the ventilating pipe (3) extends into the ventilating box (2) and is located above the bottom plate (22), a bending section (31) is arranged between the ventilating pipe (3) and the ventilating machine room (1), the bending section (31) comprises a low section (311) close to the ventilating box (2) and a high section (312) connected with the low section (311) and close to the ventilating machine room (1), the high section (312) is rotatably connected with a blocking plate (313) used for controlling the on-off state of a pipeline of the high section (312), when the fan is started, the blocking plate (313) is jacked up under the action of wind power, and the pipeline of the high-level section (312) is in a communicated state.

2. A downdraft prevention ventilation shaft according to claim 1, wherein the blocking plate (313) is disposed obliquely with its lower end facing the lower section (311), and the higher end of the blocking plate (313) is hinged to the inner wall of the upper section (312).

3. The anti-backflow ventilation shaft as claimed in claim 2, wherein a sealing sleeve (314) which is embedded with the inner wall of the high-level section (312) and is provided with an opening (3141) is arranged in the high-level section, and the high end and the low end of the blocking plate (313) are respectively attached to one side of the sealing sleeve (314).

4. A downdraft prevention ventilation shaft according to claim 3, wherein a weight block (3131) is provided on a side of the blocking plate (313) remote from the sealing sleeve (314).

5. The anti-backflow ventilating shaft according to claim 1, wherein the ventilating opening (24) is sequentially connected with a plurality of fan blades (25) in a rotating manner along the height direction, and a buoyancy block (252) is arranged on one side of each fan blade (25) positioned inside the ventilating box (2).

6. The anti-backflow ventilation shaft is characterized in that one end, close to the ventilation box (2), of the ventilation pipe (3) is provided with a tapered section (32), and an opening (3141) at one end, close to the top of the ventilation box (2), of the tapered section (32) is gradually reduced.

7. The anti-backflow ventilating shaft according to claim 6, wherein a buoyancy cover (321) is arranged at the opening (3141) of the tapered section (32), a closing plate (325) for closing the opening (3141) of the tapered section (32) is connected to the lower end of the buoyancy cover (321), a connecting portion (326) extending to the outer wall of the tapered section (32) is arranged at the upper end of the buoyancy cover (321), a buoyancy portion (327) made of a light material is arranged at the end of the connecting portion (326), and the position of the buoyancy portion (327) in the vertical direction is lower than the closing plate (325).

8. A backflow-preventing ventilation shaft according to claim 7, characterized in that the inner wall of the tapered section (32) is provided with a sliding groove, the two ends of the closing plate (325) are provided with sliding blocks sliding in the sliding groove, and when the sliding blocks slide to the highest position of the sliding groove, the closing plate (325) closes the opening (3141) of the tapered section (32).