CN214887990U

CN214887990U - Venturi fan

Info

Publication number: CN214887990U
Application number: CN202121415314.XU
Authority: CN
Inventors: 任重; 刘磊; 周峰; 刘路军; 李乐华
Original assignee: Wuhan Zhongyuan Furnace Engineering Technology Service Co ltd
Current assignee: Wuhan Zhongyuan Furnace Engineering Technology Service Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-11-26
Anticipated expiration: 2031-06-24

Abstract

The utility model provides a venturi fan, including suction head, accelerating tube and handle, the suction head is the annular, suction head coaxial arrangement has seted up a plurality of ventholes along the circumference array in the one end opening part of accelerating tube, and the suction head is close to one side of accelerating tube inner chamber, and the inlet port has been seted up on the outside surface of suction head, the inlet port communicates with the venthole each other, and the one end opening that the accelerating tube was kept away from to the suction head is greater than the one end opening that the suction head is close to the accelerating tube, handle fixed mounting perhaps the both ends difference fixed mounting of handle is on suction head and accelerating tube. The utility model discloses a venturi fan simple structure adopts compressed air source as the drive medium, utilizes the venturi effect, improves the output amount of wind, and convenient handheld operation of structure has good application prospect.

Description

Venturi fan

Technical Field

The utility model relates to a fan equipment technical field especially relates to a venturi fan.

Background

The high-pressure physical fan has a wide application range, can generate high air flow without movable parts, can be used for clearing hazardous gas, ventilating, cooling a high-temperature environment and the like in industries such as petroleum, shipbuilding, metal smelting and the like, and is large in size, difficult to carry and transport, difficult to adjust the air blowing angle and inconvenient to use.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a venturi fan that structural design is more reasonable, small easily carries.

The technical scheme of the utility model is realized like this: the utility model provides a venturi fan, including air inlet head, accelerating tube and handle, the air inlet head is the annular, and air inlet head coaxial arrangement has seted up a plurality of ventholes along the circumference array in the one end opening part of accelerating tube, and one side that the air inlet head is close to accelerating tube inner chamber, and the inlet port has been seted up on the outside surface of air inlet head, inlet port and venthole communicate each other, and the one end opening that the accelerating tube was kept away from to the air inlet head is greater than the one end opening that the air inlet head is close to the accelerating tube, handle fixed mounting perhaps the both ends difference fixed mounting of handle is on air inlet head and accelerating tube.

On the basis of the above technical solution, preferably, the internal channel of the air intake head is in a trumpet shape, and the number of the air intake holes is multiple.

On the basis of the above technical scheme, preferably, the air inlet head is a metal casting, the accelerating tube is of a tubular structure, and the accelerating tube can be made of a polymer material or a metal material.

On the basis of the technical scheme, preferably, an annular cavity is formed in the air inlet head, and the annular cavity is communicated with the air outlet hole and the air inlet hole.

On the basis of the technical scheme, preferably, the opening at one end of the air outlet hole, which is close to the annular cavity, is subjected to spot facing treatment.

On the basis of the technical scheme, preferably, the inner side surface of the opening at one end of the air inlet head, which is provided with the air outlet, is provided with an annular bulge along the circumferential direction, and the annular bulge is positioned at one side, which is close to the air inlet head and corresponds to the opening at one side, of the air outlet.

On the basis of the technical scheme, preferably, the inner ring of the air inlet head is communicated with the cavity of the accelerating tube to form a ventilation channel, the axial direction of the air outlet hole is intersected with the axial direction of the ventilation channel, and the intersection point is positioned on one side, close to the accelerating tube, of the air inlet head.

Still further preferably, the axial direction of the air outlet hole and the axial direction of the ventilation channel form an angle of 5-15 °.

On the basis of the technical scheme, preferably, the number of the air outlet holes is not less than 12.

On the basis of the above technical scheme, preferably, the opening of the end of the accelerating tube close to the air inlet head is smaller than the opening of the end of the accelerating tube far away from the air inlet head.

On the basis of the technical scheme, preferably, the opening edge of one end, far away from the air inlet head, of the accelerating pipe is subjected to curling treatment.

On the basis of the technical scheme, the device preferably further comprises a support ring, the position of the accelerating tube after the crimping treatment forms an annular cavity, and the support ring is embedded and installed in the annular cavity.

The utility model discloses a venturi fan has following beneficial effect for prior art:

(1) the utility model provides a Venturi fan, which adopts compressed gas as a driving medium, adsorbs more gas to generate large air quantity through the negative pressure effect brought by high-speed fluid flow, and a plurality of air outlet hole structures arranged in arrays can quickly discharge high-flux gas with uniform air flow, and the fan is conveniently held by a handle;

(2) the utility model discloses an inlet port can also set up a plurality ofly to can change the air input, further increase air output, accelerating tube simple structure, the quality is light, simultaneously in order to guarantee accelerating tube's structural strength, carries out the turn-up at accelerating tube's end opening part and handles, improves end opening mechanical strength, can also install the support ring in the annular cavity that the turn-up inner circle formed, further improves mechanical strength.

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 side sectional view of a venturi fan of the present invention;

FIG. 2 is a cross-sectional side view of the intake head of the venturi fan of the present invention;

FIG. 3 is a side sectional view of an accelerating tube in a Venturi fan according to the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 2;

fig. 5 is a partially enlarged view of a portion B in fig. 3.

In the figure: 1-air inlet head, 2-accelerating tube, 3-handle, 4-support ring, 11-air outlet, 12-air inlet, 13-annular cavity, 14-annular bulge and 21-annular cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1, in conjunction with fig. 2-5, the venturi fan of the present invention includes: air inlet head 1, accelerating tube 2 and handle 3

The air inlet head 1 is used for ventilation as a main workpiece and is of an annular structure, the sizes of openings on two sides of the inner ring are different, the air outlet 11 is formed in one side with a smaller opening along the circumferential direction, the air inlet 12 is formed in the outer side of the air inlet head 1, the air inlet 12 is communicated with the air outlet 11, a working medium can be introduced into the air outlet 11 through the air inlet 12, the opening areas of two ends of the air inlet head 1 are different, the Venturi effect is achieved, and more gas is driven to enter the inner ring of the air inlet head 1.

Accelerating tube 2 is tubular structure, the one end that air inlet head 1 was equipped with gas outlet 11 is connected with accelerating tube 2's one end opening, gas outlet 11 is towards accelerating tube 2's inboard, thereby form the negative pressure in air inlet head 1 inner circle department through gas outlet 11 blowout high-speed gas, the gas that is located the great opening one side of air inlet head 1 then receives the pressure effect and enters into in air inlet head 1, because the open area changes, can make the air current velocity of flow that enters into in air inlet head 1 increase, reach the purpose that improves the amount of wind, as preferred, air inlet head 1 has less open-ended one end and is connected with accelerating tube 2.

The handle 3 is used for providing a holding point, and the handle 3 is arranged on the side surface of the air inlet head 1, or on the side surface of the accelerating tube 2, or fixedly arranged between the air inlet head 1 and the accelerating tube 2.

As a further preferable mode, the inner ring of the intake head 1 is in a horn shape, which is favorable for gas flow and is less likely to generate noise.

As a specific implementation manner, the number of the air outlets 11 is not less than 12, the air outlets 11 are all arranged at one end part of the air inlet head 1 with a smaller opening in an array manner, the axial direction of the air outlets 11 is intersected with the axial direction of the accelerating tube 2, and the intersection point is located at one side, close to the accelerating tube 2, of the air inlet head 1, the design can enable the area with the fastest flow speed to be located inside the accelerating tube 2, the flow speed is fast, the pressure is low, and therefore gas located on the outer side of the air inlet head 1 can be promoted to be adsorbed and enter the air inlet head 1 and finally enter the accelerating tube 2.

As a specific embodiment, the number of the air inlet holes 12 is multiple, the multiple air inlet holes 12 are arranged outside the air inlet head 1 in an array, the multiple air inlet holes 12 are all communicated with the air outlet hole 11, and the multiple air inlet holes 12 can realize the input of more compressed air, so as to improve the air volume.

On the basis of the above technical scheme, preferably, an included angle formed by the axial direction of the air inlet hole 11 and the axial direction of the accelerating tube 2 is 5-15 degrees, and preferably, the included angle is 10 degrees. When the included angle is adopted, the blowing effect of the fan is better, the noise is low, and the air output is large.

In the specific implementation mode, the annular cavity 13 has been seted up along the annular direction inboard of its annular structure body to inlet head 1, and annular cavity 13 all communicates each other with venthole 11 and inlet port 12, and inlet port 12 inputs compressed gas after, can flow in annular cavity 13 to carry the venthole 11 to different positions respectively, thereby realize compressed gas's evenly distributed, set up annular cavity 13 simultaneously and can make inlet head 1's quality lighter, easily handheld operation.

On the basis of above technical scheme, the one end opening part that venthole 11 is close to toroidal cavity 13 is handled through the spot facing, and when compressed air carried venthole 11 in from toroidal cavity 13 behind the spot facing, had the process of transition, noise vibrations appear when effectively avoiding compressed gas's passageway diameter sudden change.

In a specific embodiment, an annular protrusion 14 is circumferentially arranged on the inner side surface of the opening at the end of the air inlet head 1 where the air outlet 11 is arranged, and the annular protrusion is located on the side of the air outlet 11 close to the opening at the corresponding side of the air inlet head 1.

In the above embodiment, can reuse venturi effect after annular arch 14 again through the gas of venthole 11 combustion gas, make this region form the negative pressure, increase the inspiratory capacity of the inlet opening part of suction head 1, thereby final increase the utility model discloses venturi fan's displacement.

In a specific embodiment, the intake head 1 is a metal casting, and is formed by integrally molding or by fastening and connecting a plurality of castings.

In the specific implementation mode, accelerating tube 2 is the tubular structure, as preferred, and its body is reducing structure, and the one end that the diameter is less is connected with inlet end 1, increases the amount of wind of gas outlet department through the venturi effect.

Preferably, the accelerating tube 2 is of a thin-walled structure, and is often used in an industrial scene, the accelerating tube 2 is easily in a severe environment or an environment where mechanical collision occurs, in order to improve the structural strength of the accelerating tube 2 and reduce the weight of the accelerating tube as much as possible, the opening edge of one end of the accelerating tube 2, which is far away from the air inlet head 1, is subjected to hemming treatment, the opening of the accelerating tube 2, which is subjected to hemming treatment, has higher yield strength, and is not easily bent under the action of an external force.

As a further preferable scheme, the curling process is to curl the edge at the opening of the accelerating tube 2 outwards, so as to form a curling structure with a hollow annular cavity 21, and the outward curling does not affect the airflow inside the accelerating tube 2, thereby ensuring the stability of the output airflow.

As a further preferable scheme, the hemming device further comprises a support ring 4, and the support ring 4 is embedded and installed on the inner side of the annular cavity 21, so that the hemming structure is supported and reinforced, and the structural strength of the hemming structure is further improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made 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 venturi fan, its characterized in that, includes air inlet head (1), accelerating tube (2) and handle (3), air inlet head (1) is the annular, air inlet head (1) coaxial arrangement is at the one end opening part of accelerating tube (2), and a plurality of ventholes (11) have been seted up along circumference array to one side that air inlet head (1) is close to accelerating tube (2) inner chamber, and inlet port (12) have been seted up on the outside surface of air inlet head (1), inlet port (12) and venthole (11) communicate each other, and the one end opening that accelerating tube (2) were kept away from in air inlet head (1) is greater than the one end opening that air inlet head (1) is close to accelerating tube (2), handle (3) fixed mounting is on air inlet head (1) or accelerating tube (2) or the both ends difference fixed mounting of handle (3) is on air inlet head (1) and accelerating tube (2).

2. The venturi fan according to claim 1, wherein an annular cavity (13) is formed in the inlet head (1), and the annular cavity (13) is communicated with the outlet hole (11) and the inlet hole (12).

3. The venturi fan according to claim 2, wherein the outlet hole (11) is spot-faced near an opening at one end of the annular cavity (13).

4. The venturi fan according to claim 1, wherein the inner side surface of the opening of the end of the air inlet (1) where the air outlet (11) is provided is circumferentially provided with an annular protrusion (14), and the annular protrusion is located on the side of the air outlet (11) close to the opening of the corresponding side of the air inlet (1).

5. The venturi fan according to claim 1, wherein the inner ring of the inlet head (1) is communicated with the cavity of the accelerating tube (2) to form a ventilation channel, and the axial direction of the outlet hole (11) is intersected with the axial direction of the ventilation channel and the intersection point is located on one side of the inlet head (1) close to the accelerating tube (2).

6. The venturi fan according to claim 5, characterized in that the axial direction of the outlet aperture (11) is angled 5-15 ° to the axial direction of the ventilation channel.

7. The venturi fan according to claim 1, characterized in that the number of the outlet holes (11) is not less than 12.

8. The venturi fan according to claim 1, characterized in that the opening of the accelerating tube (2) near the inlet (1) is smaller than the opening of the accelerating tube (2) far from the inlet (1).

9. The venturi fan according to claim 1, characterised in that the opening edge of the end of the accelerating tube (2) remote from the inlet head (1) is crimped.

10. The venturi fan according to claim 9, further comprising a support ring (4), wherein the position of the accelerating tube (2) being crimped forms an annular cavity (21), and the support ring (4) is fitted in the annular cavity (21).