CN217783871U - Fire-fighting smoke exhaust fan - Google Patents

Abstract

The utility model discloses a fire-fighting smoke exhaust fan, which comprises a fan body, a silencing pipe detachably connected to the exhaust port of the fan body and a gas pipe detachably connected to the exhaust port of the silencing pipe; the silencing pipe comprises an outer pipe, flanges fixed at two ends of the outer pipe, an inner pipe arranged in the outer pipe and coaxial with the outer pipe, and a reflection ring which is perpendicular to the axial direction of the outer pipe and arranged between the outer pipe and the inner pipe, wherein the inner diameter end face of the reflection ring is fixed on the inner pipe, and the outer diameter end face of the reflection ring is attached to the inner wall of the outer pipe; and a limiting structure used for limiting the movement of the inner pipe is arranged between the outer pipe and the inner pipe. The noise in the working process can be reduced, and the structure is simple, the cost is low, and the disassembly, assembly and cleaning are convenient.

Description

Fire-fighting smoke exhaust fan

Technical Field

The utility model belongs to the technical field of smoke exhaust fan, specifically relate to a fire control smoke exhaust fan.

Background

The smoke exhaust fan realizes the emission of gas on one side by generating negative pressure through the rotation of the fan blades. The existing fire-fighting smoke exhaust fan comprises a fan body and a gas transmission pipeline connected to the exhaust port of the fan body. Because the fan body can produce the noise in the operation, how to improve noise cancelling effect, avoid producing noise pollution in the operation process, be the place that current fire control smoke exhaust fan needs the improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the current not good problem of fire control smoke exhaust fan effect, the utility model provides a fire control smoke exhaust fan, it can reduce the noise in the working process.

The utility model discloses a following technical scheme realizes:

the utility model provides a fire-fighting smoke exhaust fan, which comprises a fan body, a silencing pipe detachably connected with the exhaust port of the fan body and a gas pipe detachably connected with the exhaust port of the silencing pipe;

the silencing pipe comprises an outer pipe, flanges fixed at two ends of the outer pipe, an inner pipe which is arranged in the outer pipe and is coaxial with the outer pipe, and a reflection ring which is perpendicular to the axial direction of the outer pipe and is arranged between the outer pipe and the inner pipe, wherein the inner diameter end face of the reflection ring is fixed on the inner pipe, and the outer diameter end face of the reflection ring is attached to the inner wall of the outer pipe; and a limiting structure used for limiting the movement of the inner pipe is arranged between the outer pipe and the inner pipe.

This scheme has made the improvement on the basis of current fire control smoke exhaust fan structure, adds a hush pipe promptly between fan body and gas-supply pipe, and the amortization that utilizes the hush pipe realizes making an uproar. The silencing pipe adopts the structure of an inner pipe, an outer pipe and a reflection ring, has simple structure and low cost, and is low in cost when being transformed on the existing fire-fighting smoke exhaust fan. The silencing pipe, the fan body and the gas pipe are detachably connected, so that the silencing pipe is convenient to disassemble, assemble and clean.

In a possible design, the limiting structure comprises at least two raised strips fixed on the outer wall of the inner pipe and a limiting ring fixed in the outer pipe, and a groove for clamping the raised strips is formed in the limiting ring.

Limiting structure adopts the structure that sets up the recess on sand grip and the spacing ring in order to realize the fixed of inner tube, can move to the outside pipe exhaust port end of inner tube under the windy flow effect, also can realize that inner tube hoop pivoted is spacing, and can realize dismantling between inner tube and the outer tube to be connected, the dismouting of being convenient for is washd.

In one possible embodiment, a fixing ring is arranged between the reflection ring and the raised strip, and the raised strip is fixed on the fixing ring.

This scheme is fixed through setting up the connection that solid fixed ring realized between the sand grip, can strengthen the stability of sand grip structure.

In a possible design, the outer diameter end of the reflection ring is provided with a transition structure, and the transition structure is arranged on one side close to the air outlet of the outer tube.

The outer diameter end face of the reflection ring is attached to the inner wall of the outer tube, and certain difficulty is caused during installation. The transition structure is arranged on the reflection ring, so that the reflection ring is conveniently arranged in the outer tube. And the transition structure is arranged at one end close to the air outlet of the outer pipe, so that the reflecting surface structure of the reflecting ring is not influenced, and the influence on the noise reduction effect is avoided.

In one possible design, the transition structure is a chamfer.

The structure of the inclined plane is adopted, the structure is simple, and the installation is convenient.

In one possible design, the gas transmission pipe is a tee pipe.

This scheme does not set up the three-way pipe with the gas-supply pipe, is convenient for select the air outlet direction according to concrete installation environment, and can be to the exhaust.

In one possible design, the two ends of the three-way pipe, which are not connected with the exhaust port of the silencing pipe, are provided with one-way valves.

And two exhaust ports of the three-way pipe are provided with one-way valves, so that the backflow of exhausted gas is avoided.

In one possible design, the silencing tubes are multiple, the multiple silencing tubes are connected in series, and the inner diameter of the inner tube of the previous silencing tube is greater than or equal to the outer diameter of the inner tube of the next silencing tube and less than or equal to the inner diameter of the outer tube of the next silencing tube along the airflow direction.

Compared with the prior art, the utility model, following advantage and beneficial effect have at least:

1. the utility model discloses add a hush pipe between fan body and gas-supply pipe, utilize hush pipe's amortization to realize making an uproar.

2. The utility model discloses hush pipe adopts the structure of inner tube, outer tube, reflection ring, its simple structure, and low cost carries out the with low costs that reforms transform on current fire control smoke exhaust fan.

3. The utility model discloses hush pipe and fan body all adopt with the gas-supply pipe can dismantle connected mode, and the dismouting of being convenient for is washd.

Drawings

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

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

FIG. 2 is a cross-sectional view of the muffler pipe of the present invention;

FIG. 3 is a schematic view of the inner tube of the present invention;

fig. 4 is a schematic view of a partial structure of the outer tube of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists independently, B exists independently, and A and B exist simultaneously; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist independently; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.

It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may not be shown in unnecessary detail to avoid obscuring the examples.

Example 1

As shown in fig. 1, the utility model discloses a fire control smoke exhaust fan in the first aspect, including fan body 1, can dismantle hush pipe 2 of connection on fan body 1 gas vent and can dismantle the gas-supply pipe 3 of connection on hush pipe 2 gas vents. Specifically, the flange plates can be fixed at the air outlet of the fan body 1, the two ends of the silencing pipe 2 and the air inlet of the air conveying pipe 3, and the detachable connection of every two ports can be realized by bolts.

As shown in fig. 2, 3 and 4, the silencing tube 2 includes an outer tube 21, flanges 24 fixed at two ends of the outer tube 21, an inner tube 22 disposed in the outer tube 21 and coaxial with the outer tube 21, and a reflective ring 23 perpendicular to the axial direction of the outer tube 21 and disposed between the outer tube 21 and the inner tube 22, wherein a gap is formed between the inner tube 22 and the outer tube, i.e., a silencing cavity, the reflective ring is plate-shaped, and one surface close to an air inlet of the outer tube 21 is perpendicular to the inner wall of the outer tube 21, i.e., a silencing reflective surface. The inner diameter end face of the reflection ring 23 is fixed on the inner tube 22, and the outer diameter end face is attached to the inner wall of the outer tube 21, so that the air enters the other side of the emission ring along the reduction between the reflection ring and the inner wall of the outer tube in the working process. In the working process, the reflecting ring reflects wind, the inner pipe easily moves towards the air outlet end of the outer pipe under the action of wind flow, and in order to enhance the structural stability of the inner pipe, a limiting structure used for limiting the movement of the inner pipe is arranged between the outer pipe 21 and the inner pipe 22. Specifically, referring to fig. 3 and 4, the limiting structure includes at least two protruding strips 41 fixed on the outer wall of the inner tube 22 and a limiting ring 42 fixed in the outer tube 21, and a groove 43 for clamping the protruding strips 41 is formed on the limiting ring 42. The stop collar 42 preferably has an inner diameter less than the outer diameter of the inner tube to facilitate passage of the outer tube therethrough. A fixing ring 44 is arranged between the reflection ring 23 and the convex strip 41, and the convex strip 41 is fixed on the fixing ring 44. For further structural stability, a retaining ring 44 may also be provided as shown in FIG. 3, with the inner diameter being fixed to the inner tube. For the convenience of installation, the outer diameter end of the reflection ring 23 is provided with a transition structure 231, which is disposed at a side close to the air outlet of the outer tube 21. The transition structure is a chamfer or chamfer structure. Preferably chamfered to facilitate machining.

By adopting the silencing pipe structure, the silencing principle is as follows: wind flows into the gap between the outer pipe and the inner pipe through the air inlet of the outer pipe, partial sound waves vertically enter the gap between the outer pipe and the inner pipe, the sound waves vertically return through the reflecting surface of the reflecting ring after flowing to the reflecting plate, and the direction of the incident sound waves in the gap is opposite to that of the reflected sound waves.

Specifically, the gas transmission pipe 3 is a three-way pipe. And two ends of the three-way pipe, which are not connected with the exhaust port of the silencing pipe 2, are provided with check valves. The check valve allows air to flow through the muffler pipe only from one side to the other. It should be noted that the connection of the check valve and the pipeline is provided by the prior art, and is not marked in the drawings.

Example 2

Based on the principle and structure of the embodiment, the embodiment discloses a preferable mode, namely, in some occasions with higher noise elimination requirements, a plurality of noise elimination pipes with the structures can be adopted to be connected in series, and the purpose that the noise elimination stage by stage reaches the finally output airflow sound to meet the specified requirements is achieved. Preferably, the silencing tubes 2 are multiple and are connected in series, and along the airflow direction, the inner diameter of the inner tube of the previous silencing tube 2 is greater than or equal to the outer diameter of the inner tube of the next silencing tube 2 and is less than or equal to the inner diameter of the outer tube of the next silencing tube 2. That is, taking 2 silencer structures in embodiment 1 as an example, the air inlet of the first silencer pipe is connected with the air outlet of the blower body 1, the air outlet of the first silencer pipe is connected with the air inlet of the second silencer pipe, and the air outlet of the second silencer pipe is connected with the air inlet of the air pipe 3. The two silencer pipes 2 have the same structure, and are different only in the specification of each part, that is, the inner diameter of the inner pipe of the first silencer pipe 2 is smaller than or equal to the inner diameter of the outer pipe of the second silencer pipe 2, and is larger than or equal to the outer diameter of the inner pipe of the second silencer pipe 2. The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: modifications may be made to the embodiments described above, or equivalents may be substituted for some of the features described. Such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (8)

1. A fire-fighting smoke exhaust fan is characterized by comprising a fan body (1), a silencing pipe (2) detachably connected to an exhaust port of the fan body (1), and a gas conveying pipe (3) detachably connected to the exhaust port of the silencing pipe (2);

the silencing pipe (2) comprises an outer pipe (21), flanges (24) fixed at two ends of the outer pipe (21), an inner pipe (22) arranged in the outer pipe (21) and coaxial with the outer pipe (21), and a reflection ring (23) perpendicular to the axial direction of the outer pipe (21) and arranged between the outer pipe (21) and the inner pipe (22), wherein the inner diameter end face of the reflection ring (23) is fixed on the inner pipe (22), and the outer diameter end face of the reflection ring is attached to the inner wall of the outer pipe (21); and a limiting structure for limiting the movement of the inner pipe is arranged between the outer pipe (21) and the inner pipe (22).

2. A fire fighting smoke exhaust fan according to claim 1, wherein the limiting structure comprises at least two protruding strips (41) fixed on the outer wall of the inner pipe (22) and a limiting ring (42) fixed in the outer pipe (21), and a groove (43) for clamping the protruding strips (41) is arranged on the limiting ring (42).

3. A fire fighting smoke exhaust fan according to claim 2 wherein a fixing ring (44) is provided between the reflection ring (23) and the rib (41), the rib (41) being fixed to the fixing ring (44).

4. A fire fighting smoke exhaust fan according to claim 1, characterized in that the outer diameter end of the reflection ring (23) is provided with a transition structure (231) which is placed at a side close to the air outlet of the outer tube (21).

5. A fire protection smoke exhaust fan as claimed in claim 4 wherein said transition structure is a chamfered surface.

6. A fire fighting smoke exhaust fan according to claim 1, characterized in that the gas pipe (3) is a three-way pipe.

7. A fire-fighting smoke exhaust fan according to claim 6, characterized in that two ends of the three-way pipe, which are not connected with the exhaust port of the silencing pipe (2), are provided with one-way valves.

8. A fire fighting smoke exhaust fan according to claim 1, characterized in that there are a plurality of the muffling pipes (2), and the muffling pipes are connected in series, and along the airflow direction, the inner diameter of the inner pipe of the previous muffling pipe (2) is greater than or equal to the outer diameter of the inner pipe of the next muffling pipe (2) and less than or equal to the inner diameter of the outer pipe of the next muffling pipe (2).

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