CN212644655U

CN212644655U - Novel down-draft prevention device

Info

Publication number: CN212644655U
Application number: CN202020926433.0U
Authority: CN
Inventors: 钟英
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-03-02
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a novel prevent down draught device turns right from a left side and includes in proper order and prevent down draught sleeve pipe, concave surface return air cover and convex surface return air cover, prevent down draught sleeve pipe, concave surface return air cover and convex surface return air cover between concatenate fixed stable connection structure who forms a "parachute" form through A-frame, the central authorities of concave surface return air cover seted up the round hole, prevent down draught sleeve pipe cup joint on the blast pipe, the blast pipe stretch into the round hole and with leave the clearance between the internal surface of convex surface return air cover, can make the blast pipe when meetting openly or violently wind, prevent that the air current from getting into the blast pipe and influencing normal exhaust, moreover the utility model has the advantages of simple structure, the cost is low, and the installation is also very convenient.

Description

Novel down-draft prevention device

Technical Field

The utility model belongs to the technical field of exhaust-gas duct accessory technique and specifically relates to a novel prevent down draught device.

Background

When indoor gas room heater, firewood coal stove room heater were burnt, need be with the waste gas discharge of burning outdoor, ordinary down draught is in the use, if meet outdoor wind-force great or the air current position special time, the air current will be to suck down in the exhaust pipe, lead to the unable outdoor or the unable phenomenon of burning of exhaust gas, consequently need design a novel anti-downdraft device of a section, solve the unable phenomenon of exhaust gas in the air current suck-down exhaust pipe.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: in order to solve the problems existing in the prior art in the background art, a novel anti-downdraft device is provided.

The utility model provides a technical scheme that its technical problem adopted is: a novel anti-downdraft device sequentially comprises an anti-downdraft sleeve, a concave air return cover and a convex air return cover from left to right, wherein the anti-downdraft sleeve, the concave air return cover and the convex air return cover are fixedly connected in series through a triangular support to form a parachute-shaped stable connecting structure;

furthermore, the anti-downdraft sleeve pipe and the exhaust pipe are fixed through screws, and when the exhaust pipe is installed, the exhaust pipe is directly fixed after the inserting position of the exhaust pipe is adjusted, so that the exhaust pipe is prevented from falling off;

furthermore, the triangular bracket of the utility model comprises three connecting rods distributed equidistantly according to the circumference of the orifice of the anti-downdraft sleeve, one end of each connecting rod is welded and fixed on the anti-downdraft sleeve, and the other end of each connecting rod passes through the concave air return cover and is welded and fixed on the convex air return cover;

further, convex surface return air cover's cover keep off area and be greater than concave surface return air cover effectively guarantees openly and horizontal incoming air can both perfectly stop.

The utility model has the advantages that: the utility model discloses a novel prevent down draught device solves the problem that exists among the conventional art, can make the blast pipe when meetting openly or crossly wind, prevent that the air current from getting into the blast pipe and influencing normal exhaust, moreover the utility model has the advantages of simple structure, the cost is low, and the installation is also very convenient, and is very practical, is worth promoting.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the anti-downdraft device comprises an anti-downdraft sleeve, 2 parts of a concave air return cover, 3 parts of a convex air return cover, 4 parts of an exhaust pipe and 5 parts of a connecting rod.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the embodiment of the novel anti-wind-back device of the present invention sequentially comprises an anti-wind-back sleeve 1, a concave air-returning cover 2 and a convex air-returning cover 3 from left to right, wherein the anti-wind-back sleeve 1, the concave air-returning cover 2 and the convex air-returning cover 3 are fixedly connected in series by a triangular bracket to form a stable connection structure in a shape of a parachute, a circular hole is formed in the center of the concave air-returning cover 2, the anti-wind-back sleeve 1 is sleeved on an exhaust pipe 4, and the exhaust pipe 4 extends into the circular hole and leaves a gap with the inner surface of the convex air-returning cover 3; the anti-downdraft sleeve 1 and the exhaust pipe 4 are fixed through screws, and when the exhaust pipe 4 is installed, the anti-downdraft sleeve is directly fixed after the inserting position of the exhaust pipe 4 is adjusted, so that falling off is prevented; the triangular support comprises three connecting rods 5 which are equidistantly distributed according to the circumference of the orifice of the anti-downdraft sleeve 1, one end of each connecting rod 5 is fixedly welded on the anti-downdraft sleeve 1, and the other end of each connecting rod 5 penetrates through the concave air return cover 2 and is fixedly welded on the convex air return cover 3; the cover blocking area of the convex air return cover 3 is larger than that of the concave air return cover 2, so that the front and transverse incoming air can be perfectly blocked.

The working principle is as follows:

the air flow is blown from the front, and the wind is blocked by the convex surface of the convex air returning cover 3, and is dispersed to the arc periphery of the convex surface of the convex air returning cover 3, so that the wind cannot enter the waste gas exhaust port.

When the front airflow meets the wall surface and the obstacle, the wind power flows back and blows towards the inside of the concave air return cover 2, and the airflow is dispersed along with the arc inside the concave surface and the arc inside the convex air return cover 3 and cannot flow back into the waste gas exhaust port.

If meet the air current and transversely blow, when the air current was through the air outlet of concave surface and convex surface, the air current can be attached to the arc direction flow of concave surface and convex surface, reduces the carminative resistance of waste gas vent, makes the waste gas vent normally exhaust.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a novel prevent down-draught device which characterized in that: turn right from a left side and include down draught prevention sleeve pipe (1), concave surface return air cover (2) and convex surface return air cover (3) in proper order, down draught prevention sleeve pipe (1), concave surface return air cover (2) and convex surface return air cover (3) between connect in series through the A-frame and fix the stable connection structure who forms a "parachute" form, the central authorities of concave surface return air cover (2) seted up the round hole, down draught prevention sleeve pipe (1) cup joint on blast pipe (4), blast pipe (4) stretch into the round hole and with leave the clearance between the internal surface of convex surface return air cover (3).

2. The novel down draft prevention device as claimed in claim 1, wherein: the anti-downdraft sleeve (1) and the exhaust pipe (4) are fixed through screws.

3. The novel down draft prevention device as claimed in claim 1, wherein: the A-frame include three presses prevent down connecting rod (5) that the mouth of pipe circumference equidistance of leeward sleeve pipe (1) distributed, the one end welded fastening of connecting rod (5) prevent down on leeward sleeve pipe (1), connecting rod (5) pass other end welded fastening is in behind concave surface return air cover (2) on convex surface return air cover (3).

4. The novel down draft prevention device as claimed in claim 1, wherein: the cover shield area of the convex air return cover (3) is larger than that of the concave air return cover (2).