CN207299533U - An anti-backflow diversion device - Google Patents

Abstract

The utility model discloses an anti-backflow guide device, comprising: a guide body, wherein an air duct is arranged on the guide body, and the air duct comprises an air inlet and an air outlet; the guide device also comprises a guide slope, which is arranged on the guide body and is located between the air inlet and the air outlet, and is used to guide the fluid to flow from the air inlet to the air outlet; a baffle, which is pivotally connected to the guide body, and its pivot axis is located at one side of the air outlet, and the baffle corresponds to the air outlet and can close the air outlet; the guide device with the above structure has good sealing performance and will not cause exhaust gas backflow, the pivot axis of the baffle is located at one side of the air outlet, the airflow exerts a large torque on the baffle, and the baffle is easier to open, thereby ensuring the normal operation and stability of the guide device and greatly reducing the probability of failure.

Description

An anti-backflow diversion device

technical field

The utility model relates to a flow guiding device for gas equipment, in particular to a flow guiding device for preventing backflow.

Background technique

The existing condensing gas modular furnace includes an air duct, and the air duct is connected with a plurality of guide devices at intervals along the vertical direction. Exhaust in the duct, the structure of the existing diversion device is made by the bellows bending method, the volume is relatively large, and it occupies more effective area of the flue, which affects the smoke exhaust, and because of the large volume, it is easy to cause two adjacent diversion Device interference; in order to prevent the backflow of exhaust gas from affecting the work of the diversion device, the general diversion device includes a round pipe elbow, and two semicircular baffles are pivotally connected to the air outlet of the round pipe elbow through two pivots. The inner surface of the round pipe elbow is provided with a pad at the lower end of the two semicircular baffles. The two baffles are opened to the middle of the air outlet under the action of the air flow. When the fan stops working, the two baffles The blocking piece is leaned against the pad part under the action of its own weight. However, the pivotal shaft of the baffle of the air guiding device of the above structure is located in the middle of the air outlet, the moment of the air flow on the baffle is small, the baffle is easily stuck, and the stability is poor; There is a large gap between them, and the sealing performance is poor, which easily leads to the backflow of exhaust gas; secondly, the structure of the flow guide device with the above structure is complicated, which is not convenient for manufacturing.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide an anti-backflow guide device, which has good sealing performance, is not easy to be stuck, and works stably.

The technical scheme that the utility model adopts for solving its technical problem is:

A flow guiding device for preventing backflow, comprising: a flow guiding body, an air channel is arranged on the flow guiding body, and the air channel includes an air inlet and an air outlet; The flow body is located between the air inlet and the air outlet, and is used to guide the fluid to flow from the air inlet to the air outlet; the baffle is pivotally connected to the flow guide body, and its pivot shaft is located at the air outlet On one side, the baffle corresponds to the air outlet and can close the air outlet.

The guide body includes a backing plate with an opening, one side of the backing plate is provided with a flange, and the flange communicates with the external air inlet pipe, and the other side of the backing plate is provided with a guide piece. The air inlet is arranged on the flange and communicates with the opening of the backing plate, the air outlet is arranged on the upper end of the guide piece, and the guide slope is arranged on the lower part of the guide piece and guides the airflow to discharge upward.

There is a gap between the lower edge of the guide slope and the backing plate.

The lower edge of the diversion slope is also provided with a diversion hole, and the height of the diversion hole is lower than the lower edge of the air inlet.

The flange, the backing plate, and the guide are detachably connected.

The backing plate is provided with more than one first backing plate through hole, and the flange and the guide member are respectively provided with a first flange through hole and a guide member through hole corresponding to the first backing plate through hole. holes, the first flange through hole, the first backing plate through hole and the guide member through hole are fixedly connected by screws or bolts.

The guide includes two side parts connected to both sides of the guide slope and a back connected to the upper edge of the guide slope, the ends of the two sides away from the backing plate are connected to the back, and the side faces the backing plate One end is provided with a flange, and the through hole of the guide member is arranged on the flange.

The guide slope, the back and the two side parts are integrally formed.

More than one mounting hole is also provided on the outer periphery of the backing plate, one of which is located above the blocking piece, and the blocking piece can abut against the mounting hole above it.

A sealing gasket is also arranged between the flange and the backing plate.

The beneficial effects of the utility model are: an anti-backflow diversion device, comprising: a diversion body, an air duct is arranged on the diversion body, and the air duct includes an air inlet and an air outlet; the diversion device also It includes a flow guiding slope, which is arranged on the flow guiding body, between the air inlet and the air outlet, and is used to guide the fluid to flow from the air inlet to the air outlet; the baffle is pivotally connected to the flow guiding body , the pivot shaft is located on one side of the air outlet, and the baffle corresponds to the air outlet, and can close the air outlet; the air guide device with the above structure has better sealing performance, and will not cause exhaust gas to flow backward. The pivot shaft is located on one side of the air outlet, and the moment of air flow on the baffle is larger, making it easier to open the baffle, which ensures the normal operation and stability of the air guide device and greatly reduces the probability of failure.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural exploded view of Fig. 1 embodiment;

Fig. 3 is a schematic structural view of the closed air outlet in the embodiment of Fig. 1;

FIG. 4 is a schematic diagram of another viewing angle of FIG. 3 .

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, it should be noted that the description of the following embodiments is schematic and does not constitute a specific limitation to the utility model.

Referring to Figures 1 to 4, an anti-backflow guide device includes: a guide body 10, on which an air channel is provided, the air channel includes an air inlet 11 and an air outlet 12; The flow device also includes a flow guiding slope 31, which is arranged on the flow guiding body 10, between the air inlet 11 and the air outlet 12, and is used to guide the fluid to flow from the air inlet 11 to the air outlet 12; the baffle 2 , is pivotally connected to the air guide body 10 , and its pivot shaft is located on one side of the air outlet 12 , the flap 2 corresponds to the air outlet 12 and can close the air outlet 12 . When the baffle 2 is closed, it can completely cover the air outlet 12, so that the air guide device has better sealing performance and prevents the backflow of exhaust gas. The pivot shaft of the baffle 2 is located on the side of the air outlet 12. Larger, the flap 2 is easier to open, which ensures the normal operation and stability of the deflector and greatly reduces the probability of failure.

In this embodiment, the air guiding body 10 includes a backing plate 4 with an opening, and a flange 5 is provided on one side of the backing plate 4, and the flange 5 communicates with the air inlet duct outside the air guiding device. The other side of the backing plate 4 is provided with a guide 3, the air inlet 11 is arranged on the flange 5 and communicates with the opening of the backing plate 3, the air outlet 12 is arranged on the upper end of the guide 3, the The guide inclined surface 31 is arranged on the lower part of the guide member 3 and guides the airflow to discharge upward.

Preferably, there is a gap between the lower edge of the guide slope 31 and the backing plate 4 , and the gap is used to discharge the condensed water produced by the exhaust gas on the guide member 3 .

Preferably, a guide hole 311 is provided on the lower edge of the guide slope 31 , and the height of the guide hole 311 is lower than the lower edge of the air inlet 11 . When the airflow enters from the air inlet 11, the airflow moves upward along the guide slope 31, and the condensed water generated by the airflow flows down along the guide slope 31 under the action of gravity, which is not conducive to Flow out from the gap, and the guide hole 311 helps the condensed water to flow out. Secondly, the height of the guide hole 311 is lower than the lower edge of the air inlet 11, which can prevent the airflow from directly impacting the guide hole 311, which is conducive to condensation. The water drains downwards. In this embodiment, preferably, the area near where the diversion hole 311 is located is an equal-pressure region, the airflow only moves upward along the diversion slope 31, and the condensed water generated by the airflow only moves downward along the diversion slope 31 under the action of gravity Flow, the guide hole 311 not only facilitates the discharge of condensed water and dust, but also prevents the gas in the flue from flowing backward.

The flow guiding device of the above structure occupies less space in the flue, reduces the influence on the smoke exhaust, is not easy to interfere with the adjacent flow guiding device, and does not cause backflow, which prevents the flow guiding device from being opposite to the adjacent flow guiding device. The operation of another deflector below the deflector is affected.

Preferably, the flange 5 , the backing plate 4 and the guide 3 are detachably connected. In this embodiment, the backing plate 4 is provided with more than one first backing plate through hole 41, and the flange 5 and the guide member 3 are respectively provided with holes corresponding to the first backing plate through hole 41. The first flange through hole 51 and the guide member through hole 32 are fixedly connected by screws or bolts. In other embodiments, the flange 5 , the backing plate 4 , and the guide 3 may also be connected by buckles.

In this embodiment, the guide member 3 includes two side portions 33 respectively connected to the two sides of the guide slope 31 and a back portion 34 connected to the upper edge of the guide slope 31, and the two side portions 33 are far away from the backing plate 4. One end is connected to the back 34 , and the side portion 33 is provided with a flange 331 facing the backing plate 4 , and the through hole 32 of the guide member is disposed on the flange 331 . Further, the guide slope 31 , the back 34 and the two side parts 33 are integrally formed. In the molding process of the guide piece 3, first the iron sheet is bent to form the guide slope 31 and the back 34, then the two side parts 33 connected to the two sides of the back 34 are bent inwardly, and then the side parts 33 are turned towards the pad One end of the plate 4 is bent inwardly to form a flange 331 , and finally, the lower part of the side portion 33 is bent toward the outer surface of the guide slope 31 to form a second flange 332 . The guide member 3 with the above structure has the advantages of simple structure, high production efficiency and low cost.

More than one mounting hole 42 is provided on the outer periphery of the backing plate 4 , one of the mounting holes 42 is located above the blocking piece 2 , and the blocking piece 2 can abut against the mounting hole 42 above it. The flow guiding device of the present utility model is installed on the equipment through the mounting holes 42 by screws. Since one of the mounting holes 42 is arranged on the backing plate 4 and is located above the baffle 2, when the baffle 2 is impacted by the air flow , the baffle 2 rotates upwards, and the end surface of the baffle 2 abuts against the rod of the screw on the mounting hole 42, so that an angle is formed between the baffle 2 and the backing plate 4 after the baffle 2 is rotated open, when no air flow is discharged upward , the baffle plate 2 rotates downward under the action of its own weight to abut against the guide member 3 and close the air outlet 12 .

A sealing gasket is also provided between the flange 5 and the backing plate 4 , the sealing gasket can prevent airflow from seeping out from the gap between the flange 5 and the backing plate 4 .

The above is only the preferred implementation of the utility model, and is not limited to the above specific implementation, as long as the technical solutions to achieve the purpose of the utility model by basically the same means are within the scope of protection of the utility model.

Claims (10)

1. An anti-backflow diversion device, comprising: A guide body (10), the guide body (10) is provided with an air duct, the air duct includes an air inlet (11) and an air outlet (12); It is characterized in that, A diversion slope (31), arranged on the diversion body (10), between the air inlet (11) and the air outlet (12), for guiding the fluid to flow from the air inlet (11) to the air outlet (12); The baffle (2) is pivotally connected to the air guide body (10), and its pivot shaft is located on one side of the air outlet (12), and the baffle (2) corresponds to the air outlet (12), The air outlet (12) can be closed. 2. The anti-backflow diversion device according to claim 1, characterized in that: The guide body (10) includes a backing plate (4) with an opening, one side of the backing plate (4) is provided with a flange (5), and the flange (5) communicates with an external air inlet duct, The other side of the backing plate (4) is provided with a guide (3), the air inlet (11) is arranged on the flange (5) and communicates with the opening of the backing plate (4), and the air outlet ( 12) It is arranged on the upper end of the guide (3), and the guide slope (31) is arranged on the lower part of the guide (3) and guides the airflow to discharge upward. 3. The anti-backflow diversion device according to claim 2, characterized in that: There is a gap between the lower edge of the guide slope (31) and the backing plate (4). 4. The anti-backflow diversion device according to claim 3, characterized in that: A diversion hole (311) is also provided on the lower edge of the diversion slope (31), and the height of the diversion hole (311) is lower than the lower edge of the air inlet (11). 5. The anti-backflow diversion device according to claim 2, characterized in that: The flange (5), the backing plate (4) and the guide (3) are detachably connected. 6. The anti-backflow diversion device according to claim 5, characterized in that: The backing plate (4) is provided with more than one first backing plate through hole (41), and the flange (5) and the guide (3) are respectively provided with the first backing plate through hole ( 41) The corresponding first flange through hole (51) and the guide member through hole (32), the first flange through hole (51), the first backing plate through hole (41) and the guide member through hole ( 32) Fix the connection by screws or bolts. 7. The anti-backflow diversion device according to claim 6, characterized in that: The guide (3) includes two side parts (33) connected to both sides of the flow guide slope (31) and a back part (34) connected to the upper edge of the flow guide slope (31), the two side parts (33) The end away from the backing plate (4) is connected to the back (34), and the side portion (33) is provided with a flanging (331) towards the end of the backing plate (4), and the guide member through hole (32) Set on the flange (331). 8. The anti-backflow diversion device according to claim 7, characterized in that: The guide slope (31), the back (34) and the two side parts (33) are integrally formed. 9. The anti-backflow diversion device according to claim 2, characterized in that: More than one mounting hole (42) is also provided on the outer periphery of the backing plate (4), wherein one mounting hole (42) is located above the blocking piece (2), and the blocking piece (2) can abut against on the mounting hole (42) above it. 10. The anti-backflow diversion device according to claim 2, characterized in that: A sealing gasket is also arranged between the flange (5) and the backing plate (4).