CN211370772U

CN211370772U - Mixed-flow smoke exhaust fan

Info

Publication number: CN211370772U
Application number: CN201921056135.4U
Authority: CN
Inventors: 钱丛能
Original assignee: Wuhan High Tech Blower Manufacturing Co ltd
Current assignee: Wuhan High Tech Blower Manufacturing Co ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-08-28
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a mixed flow type smoke exhaust fan, which comprises an outer shell, motor and impeller, the one end of shell is provided with the air intake, the other end is provided with the air outlet, through mounting bracket fixed connection between the inner wall of motor and shell, the one end of motor is provided with the motor shaft, the one end and the impeller fixed connection of motor shaft, the impeller includes wheel hub and blade, the blade is mixed flow type distortion blade, the curve of blade is the logarithm involute, the blade is provided with a plurality of, a plurality of blade evenly distributed is in wheel hub's outer lane, the both sides of shell all are provided with the side air inlet that is located impeller one side. The utility model discloses a mixed-flow smoke exhaust fan ventilates and discharges fume, and crooked plate-shaped blade in the fan lets the air not only be centrifugal motion but also be axial motion, and the motion of air has mixed axial compressor and two kinds of motion forms of centrifugation in the shell, can improve ventilation smoke exhaust efficiency greatly for axial fan.

Description

Mixed-flow smoke exhaust fan

Technical Field

The utility model relates to a smoke exhaust fan especially relates to a mixed flow type smoke exhaust fan.

Background

With the development of the construction industry, the fire prevention problem of buildings becomes more and more important. The fire-fighting smoke-discharging system of the prior building mainly comprises an induction device, a control device, a smoke-discharging air duct, a smoke-discharging fan and the like. The fire-fighting smoke exhaust fan is used as a core component of a fire-fighting smoke exhaust system, and good economic benefits and social benefits can be generated by developing the high-performance fire-fighting smoke exhaust fan. At present, most of fire-fighting smoke exhaust fans are axial flow fans, and because the installation is simple, the use cost is low. However, the axial flow fan has low wind pressure, resulting in slow speed of air exhaust and smoke exhaust, and cannot ventilate and discharge smoke quickly in time when encountering large-scale fire.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a mixed-flow smoke exhaust fan, the efficiency of ventilation and smoke exhaust during the multiplicable conflagration.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a mixed flow smoke exhaust fan, includes shell, motor and impeller, the one end of shell is provided with the air intake, and the other end is provided with the air outlet, through mounting bracket fixed connection between the inner wall of motor and shell, the one end of motor is provided with the motor shaft, the one end and the impeller fixed connection of motor shaft, the impeller includes wheel hub and blade, the blade is mixed flow type distortion blade, the curve of blade is involute for the logarithm, the blade is provided with a plurality of, and is a plurality of blade evenly distributed is in wheel hub's outer lane, the both sides of shell all are provided with the side air inlet that is located impeller one side.

As an optimal technical scheme of the utility model, the both sides of side air intake all are provided with the spout, it has seal baffle to peg graft in the spout.

As a preferred technical scheme of the utility model, both ends all are provided with the guide plate of slope about the side air intake, and the opening of two guide plates reduces gradually toward the air outlet direction from the air intake direction of shell.

As a preferred technical scheme of the utility model, the upper and lower end of spout is the open type setting, the seal baffle joint is in the spout, just seal baffle's bottom is connected with the stay cord.

As an optimal technical scheme of the utility model, be provided with the hole groove that supplies seal baffle to pass through between guide plate and the shell of seal baffle below.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

the utility model adopts the mixed-flow smoke exhaust fan to ventilate and exhaust smoke, the bent plate-shaped blades in the fan can lead the air to do both centrifugal motion and axial motion, and the motion of the air in the shell mixes two motion forms of axial flow and centrifugation, thus greatly improving the ventilation and smoke exhaust efficiency compared with the axial flow fan; the both sides of impeller still are provided with the side air intake that is located the shell, and the air intake of shell one end is mated again, but the characteristic that the curved plate-shaped blade made the air both do centrifugal motion and do axial motion can be given full play to, and the convulsions of following a plurality of air intakes are simultaneously discharged fume to further improve smoke extraction efficiency.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic side view of the present invention;

fig. 3 is a schematic structural diagram of the impeller of the present invention;

wherein: 1. a housing; 2. a mounting frame; 3. a motor; 4. a motor shaft; 5. an impeller; 6. a side air inlet; 7. a chute; 8. sealing the baffle; 9. a baffle; 10. a hub; 11. a blade.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to fig. 1-3, a mixed flow type smoke exhaust fan, including shell 1, motor 3 and impeller 5, the one end of shell 1 is provided with the air intake, the other end is provided with the air outlet, pass through mounting bracket 2 fixed connection between the inner wall of motor 3 and shell 1, the one end of motor 3 is provided with motor shaft 4, the one end and the impeller 5 fixed connection of motor shaft 4, impeller 5 includes wheel hub 10 and blade 11, blade 11 is mixed flow type distortion blade, the curve of blade 11 is the involute of logarithm, blade 11 is provided with a plurality of, a plurality of blade 11 evenly distributed is in the outer lane of wheel hub 10, the both sides of shell 1 all are provided with the side air intake 6 that is located one side of impeller 5.

Wherein, the both sides of side air intake 6 all are provided with spout 7, and it has sealed baffle 8 to peg graft in the spout 7, and accessible sealed baffle 8 is sealed with side air intake 6 at ordinary times to prevent that the dust from passing through in the side air intake 6 entering fan.

Wherein, both ends all are provided with the guide plate 9 of slope about the side air inlet 6, and the opening of two guide plates 9 reduces gradually towards the air outlet direction from the air inlet direction of shell 1, the water conservancy diversion effect through guide plate 9 multiplicable ventilation smoke exhaust efficiency.

Wherein, the upper and lower end of spout 7 is the open type setting, and 8 joints of seal baffle are in spout 7, and seal baffle 8's bottom is connected with the stay cord, and when needs used the device to discharge fume, the direct pulldown seal baffle 8 of accessible stay cord to seal baffle 8 is torn open fast, can not influence the normal operating of fan.

Wherein, be provided with the hole groove that supplies seal baffle 8 to pass through between guide plate 9 and the shell 1 of seal baffle 8 below, make things convenient for seal baffle 8's installation to dismantle.

Specifically, when a fire disaster occurs and smoke needs to be discharged, the motor 3 is started, the impeller 5 is driven to rotate, and the blades 11 in the shape of a bent plate enable air to do both centrifugal motion and axial motion, so that the blades 11 rotate, air is exhausted and smoke is discharged from the air inlets in the end openings of the shell 1, air is exhausted and smoke is discharged from the side air inlets 6 on the two side faces of the shell 1, the smoke discharge area and the smoke discharge amount are increased, and the smoke discharge efficiency is greatly increased.

The embodiments of the present invention are not limited to the above embodiments, and according to the contents of the above embodiments of the present invention, the above preferred embodiments can also make modifications, replacements or combinations of other forms by using conventional technical knowledge and conventional means in the field without departing from the basic technical idea of the present invention, and the obtained other embodiments all fall within the scope of the present invention.

Claims

1. A mixed flow type smoke exhaust fan, which comprises a shell (1), a motor (3) and an impeller (5), it is characterized in that one end of the shell (1) is provided with an air inlet, the other end is provided with an air outlet, the motor (3) is fixedly connected with the inner wall of the shell (1) through a mounting rack (2), a motor shaft (4) is arranged at one end of the motor (3), one end of the motor shaft (4) is fixedly connected with the impeller (5), the impeller (5) comprises a hub (10) and blades (11), the blades (11) are mixed flow type twisted blades, the curve of the blades (11) is a logarithmic involute, a plurality of blades (11) are arranged, the plurality of blades (11) are uniformly distributed on the outer ring of the hub (10), and side air inlets (6) positioned on one side of the impeller (5) are formed in the two sides of the shell (1).

2. A mixed-flow type smoke exhaust fan according to claim 1, wherein sliding grooves (7) are arranged on both sides of the side air inlet (6), and sealing baffles (8) are inserted into the sliding grooves (7).

3. A mixed-flow type smoke exhaust fan according to claim 1, wherein the upper and lower ends of the side air inlet (6) are provided with inclined guide plates (9), and the openings of the two guide plates (9) are gradually reduced from the air inlet direction to the air outlet direction of the housing (1).

4. A mixed-flow type smoke exhaust fan according to claim 2, wherein the upper and lower ends of the chute (7) are both open type, the sealing baffle (8) is clamped in the chute (7), and the bottom of the sealing baffle (8) is connected with a pull rope.

5. A mixed-flow type smoke exhaust fan according to claim 4, wherein a hole slot for the sealing baffle (8) to pass through is arranged between the guide plate (9) below the sealing baffle (8) and the casing (1).