CN111594463A

CN111594463A - Pneumatic smoke exhauster

Info

Publication number: CN111594463A
Application number: CN202010436929.4A
Authority: CN
Inventors: 周军平; 王希强; 周月; 王吉元
Original assignee: Guangzhou Wenchong Shipbuilding Co ltd
Current assignee: Guangzhou Wenchong Shipbuilding Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-28

Abstract

The invention relates to a pneumatic smoke exhaust machine, which comprises a shell, a wind impeller, fan blades, a transmission mechanism and a compressed air power source, wherein the shell is provided with a fan blade wheel; the shell is hollow inside; the two ends of the shell are respectively and coaxially provided with a smoke suction port and a smoke outlet; the wind impeller and the fan blades are rotationally arranged in the shell; the transmission mechanism is in linkage connection with the fan blade and the fan blades; an air inlet pipe and an air outlet pipe are respectively inserted in the positions, corresponding to the wind impeller, of the side wall of the shell; the compressed air power source is connected with the air inlet pipe through an air pipe, the compressed air power source blows compressed air into the shell through the air pipe and enables the fan blade to rotate, and then the fan blade rotates through the transmission mechanism. The invention does not need an electric drive motor to discharge smoke, avoids the danger of electric shock when in use, and is energy-saving and safe.

Description

Pneumatic smoke exhauster

Technical Field

The invention relates to the technical field of ship smoke control and ventilation dust removal, in particular to a pneumatic smoke exhaust machine.

Background

At present, most of smoke exhaust machines carry out smoke exhaust work through electric drive motors, the smoke exhaust machines consume large electric energy and are unsafe, if the smoke exhaust machines are not operated properly, potential safety hazards in the aspect of electric shock can possibly occur, and great threats are formed on personal safety of constructors. A pneumatic energy-saving smoke exhauster is designed, and harmful smoke dust generated in a narrow closed space can be safely and effectively exhausted through the smoke exhauster.

Disclosure of Invention

Based on the above, the invention aims to overcome the defects and shortcomings in the prior art and provide a pneumatic smoke exhaust machine.

A pneumatic smoke exhauster comprises a shell, a wind impeller, fan blades, a transmission mechanism and a compressed air power source; the shell is hollow inside; the two ends of the shell are respectively and coaxially provided with a smoke suction port and a smoke outlet; the air impeller is rotationally arranged in the shell, and the central axis of the air impeller is parallel to the central axis of the smoke suction port; the fan blades are rotatably arranged in the shell, and the central axes of the fan blades are parallel to the central axis of the smoking port; the transmission mechanism is in linkage connection with the fan blade and the fan blades; air inlet pipes are respectively inserted in the positions, corresponding to the wind impeller, of the side wall of the shell; the compressed air power source is connected with the air inlet pipe through an air pipe, the compressed air power source blows compressed air into the shell through the air pipe and enables the fan blade to rotate, and then the fan blade rotates through the transmission mechanism.

According to the pneumatic smoke exhaust machine, the fan blade is driven to rotate by the compressed air, smoke is exhausted without an electric drive motor, the danger of electric shock is avoided when the pneumatic smoke exhaust machine is used, and the pneumatic smoke exhaust machine is energy-saving and safe.

Furthermore, the side wall of the shell is provided with an outer convex part corresponding to the position of the wind impeller, the outer convex part is arranged around the circumferential direction of the side wall of the shell, and the outer convex part enables the inner wall of the shell to form a corresponding concave part; the wind impeller is eccentrically arranged in the shell, and the eccentric part of the wind impeller is positioned in the concave part; the air inlet pipe is arranged on the outer convex part and is positioned close to the eccentric part of the wind impeller.

The beneficial effect who adopts above-mentioned further scheme is that, through setting up outer convex part, make the air channel interference part of fan blade wheel and compressed air be located outer convex part, avoid the gas circuit that the flabellum produced and the gas circuit of compressed air mutually noninterfere, improved the smoke exhaust efficiency of induced-draft fan.

Further, the exhaust pipe is arranged on the outer convex part and used for exhausting compressed air.

The air duct has the advantages that the air duct is arranged, so that the compressed air which drives the fan blade wheel through the air inlet pipe can be discharged from the air duct to form an independent air path, and the air path generated by the fan blades and the air path of the compressed air are further prevented from being mutually interfered; tests and practices prove that 8 kilograms of compressed air is used, the highest air outlet speed of an air outlet of the exhaust pipe per second is 17m/s, the average air speed is 15m/s, and the effect of smoke exhaust can be effectively achieved to a certain extent.

Furthermore, an included angle formed between the axis of the air inlet pipe or the air outlet pipe and the normal of the wind impeller at the corresponding position is 90-150 degrees.

The beneficial effect who adopts above-mentioned further scheme is that, through the angle of rationally setting up intake pipe and blast pipe, can effectively drive the rotation of fan wheel.

Further, the transmission mechanism comprises a first gear and a second gear which are meshed with each other; the first gear is coaxially connected with the wind impeller; the second gear is coaxially connected with the fan blades.

Adopt above-mentioned further scheme's beneficial effect to be, through gear engagement transmission, make stable in structure safety.

Further, the first gear is an internal gear, and the second gear is an external gear.

The beneficial effect of adopting above-mentioned further scheme is that, through internal gear and external gear meshing, can make compact structure, save gear occupation space, and then improve the inside exhaust fume efficiency of casing.

Further, the device also comprises at least two first brackets, at least one second bracket, a first shaft, a second shaft, at least two first bearings and at least one second bearing; the first support and the second support are fixed in the shell, the first end of the first shaft lever is rotatably arranged on the first support through a first bearing, and the second end of the first shaft lever is coaxially connected with the first gear; the second shaft rod is rotatably arranged on the second support through a second bearing, the first end of the second shaft rod is coaxially connected with the second gear, and the second end of the second shaft rod is coaxially connected with the fan blades.

Furthermore, a reinforcing frame is arranged on the inner gear; the second end of the first shaft rod is coaxially connected with the first gear through the reinforcing frame.

Adopt above-mentioned further scheme's beneficial effect is, through setting up the reinforcing frame, can set the internal gear to hollow, guarantee the stable in structure of internal gear simultaneously, improved smoke exhaust efficiency.

Further, the diameters of the smoke suction port and the smoke outlet are smaller than the diameters of the fan blades.

Adopt above-mentioned further scheme's beneficial effect to be less than the diameter of flabellum through setting up the diameter with smoking mouth and outlet flue, make smoking mouth form great negative pressure, improve smoke extraction efficiency.

Further, the device also comprises an extension pipe; the lengthening pipe is detachably connected with the smoking port.

The beneficial effect of adopting above-mentioned further scheme is that, when the operation region is darker, the induced-draft fan can't get into, can connect extension pipe at the smoking mouth, reach the operation region directly, need not to remove the induced-draft fan, can reach the effect of discharging fume equally.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural section view of a pneumatic extractor of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view B-B of FIG. 1;

FIG. 4 is a schematic cross-sectional view C-C of FIG. 1;

fig. 5 is a schematic cross-sectional view D-D of fig. 1.

In the figure: 10. a housing; 11. a smoking port; 12. a smoke outlet; 13. an outer convex portion; 14. a recessed portion; 15. an air inlet pipe; 16. an exhaust pipe; 20. a wind impeller; 30. a fan blade; 41. an internal gear; 411. a reinforcing frame; 42. an outer gear; 51. a first bracket; 52. a second bracket; 53. a first shaft lever; 54. a second shaft lever; 55. a first bearing; 56. a second bearing; a. a first included angle; beta, the second included angle.

Detailed Description

Referring to fig. 1 to 5, the pneumatic smoke exhaust of the present embodiment includes a housing 10, an air inlet pipe 15, an air exhaust pipe 16, a wind impeller 20, fan blades 30, a transmission mechanism, a compressed air power source (not shown), two first brackets 51, a second bracket 52, a first shaft 53, a second shaft 54, two first bearings 55, a second bearing 56, and a lengthening pipe (not shown); the transmission mechanism comprises a first gear and a second gear which are meshed with each other, the first gear is an internal gear 41, the second gear is an external gear 42, and a reinforcing frame 411 is arranged on the internal gear 41;

specifically, the interior of the housing 10 is hollow; a smoking port 11 and a smoke outlet 12 are coaxially arranged at two ends of the shell 10 respectively, and preferably, the diameters of the smoking port 11 and the smoke outlet 12 are smaller than the diameters of the fan blades 30; the side wall of the shell 10 is provided with an external convex part 13, the external convex part 13 is arranged around the circumference of the side wall of the shell 10, and the internal wall of the shell 10 is formed into a corresponding concave part 14 by the external convex part 13;

specifically, the wind impeller 20 is eccentrically and rotatably arranged in the shell 10, and the central axis of the wind impeller 20 is parallel to the central axis of the smoke suction port 11; more specifically, the two first brackets 51 are fixed in the housing 10, the two first bearings 55 are respectively arranged on the two first brackets 51, a first end of the first shaft 53 is rotatably arranged on the two first brackets 51 through the two first bearings 55, and a second end of the first shaft 53 is coaxially connected with the internal gear 41 through the reinforcing frame 411; the wind impeller 20 is arranged on the circumferential surface of the internal gear 41, and the eccentric part of the wind impeller 20 is positioned in the recess 14;

specifically, the fan blade 30 is rotatably arranged in the housing 10, and a central axis of the fan blade 30 is overlapped with a central axis of the smoking port 11; more specifically, the second bracket 52 is fixed in the housing 10, the second shaft 54 is rotatably disposed on the second bracket 52 through a second bearing 56, a first end of the second shaft 54 is coaxially connected with the external gear 42, a second end of the second shaft 54 is coaxially connected with the fan blade 30, and the fan blade 30 is locked at the second end of the second shaft 54 through a nut; the internal gear 41 and the external gear 42 are engaged with each other;

specifically, the air inlet pipe 15 and the air outlet pipe 16 are arranged on the outer convex part 13 and are positioned close to the eccentric part of the wind impeller 20; more specifically, an included angle formed between the axis of the air inlet pipe 15 or the exhaust pipe 16 and the normal of the wind impeller 20 at the corresponding position is 90 ° to 150 °, preferably, a first included angle a formed between the axis of the air inlet pipe 15 and the normal of the wind impeller 20 at the corresponding position is 120 °, and a second included angle β formed between the axis of the exhaust pipe 16 and the normal of the wind impeller 20 at the corresponding position is 130 °;

specifically, the compressed air power source is connected with the air inlet pipe 15 through an air pipe, and the compressed air power source blows compressed air into the casing 10 through the air pipe and rotates the air impeller 20, so that the fan blades 30 rotate through the transmission mechanism.

Specifically, the extension pipe is detachably connected with the smoking port 11.

The working process of the embodiment:

starting a compressed air power source to make compressed air blow the wind impeller 20 to make the wind impeller 20 rotate, and discharging the compressed air through the exhaust pipe 16; the wind impeller 20 and the inner gear 41 are integrated, so that the inner gear 41 rotates, the inner gear 41 and the outer gear 42 are in a meshed relationship, and the outer gear 42 and the fan blades 30 are connected into a whole through the second shaft lever 54, so that the fan blades 30 can be driven to rotate; at this time, the internal gear 41 drives the external gear 42 to rotate, that is, the large gear drives the small gear to rotate, so that the rotation speed of the external gear 42 is faster, the rotation speed of the fan blades 30 is higher, the suction force is higher, the smoke suction port 11 forms a negative pressure state, the effect of rapid smoke discharge is achieved, and the smoke is discharged from the smoke outlet 12.

When the operation area is deep and the smoke exhaust fan cannot enter, the smoke exhaust fan can be connected with the lengthening pipe at the smoke suction port 11 and directly reach the operation area, the smoke exhaust fan does not need to be moved, and the smoke exhaust effect can be achieved.

Tests and practices prove that 8 kilograms of compressed air is used, the highest air outlet speed of an air outlet of an exhaust pipe 16 per second is 17m/s, the average air speed is 15m/s, the air exhaust amount of a smoke exhauster per hour is 648 cubic meters, if the smoke exhauster is used for exhausting smoke in a space of 1000 cubic meters, one smoke exhauster can exhaust the smoke in the space within 1.5 hours, and the smoke exhausting effect can be effectively achieved to a certain extent.

Compared with the prior art, the fan blade is driven to rotate by the compressed air driving fan impeller, smoke is discharged without an electric driving motor, the danger of electric shock is avoided when the fan blade is used, and the fan blade is energy-saving and safe; through setting up the outer convex part, make the air channel of fan blade wheel and compressed air interfere the part and be located outer convex part, avoid the air channel that the flabellum produced and compressed air's air channel mutually noninterfere, improved the smoke exhaust efficiency of induced-draft fan.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A pneumatic smoke exhaust machine is characterized by comprising

A housing (10), the housing (10) being hollow inside; the two ends of the shell (10) are respectively and coaxially provided with a smoke suction port (11) and a smoke outlet (12);

the air impeller (20) is rotatably arranged in the shell (10), and the central axis of the air impeller (20) is parallel to the central axis of the smoke suction port (11);

the fan blade (30) is rotatably arranged in the shell (10), and the central axis of the fan blade (30) is parallel to the central axis of the smoking port (11);

the transmission mechanism is in linkage connection with the wind impeller (20) and the fan blades (30);

an air inlet pipe (15) is inserted in the position, corresponding to the wind impeller (20), of the side wall of the shell (10); the compressed air power source is connected with the air inlet pipe (15) through an air pipe, the compressed air power source blows compressed air into the shell (10) through the air pipe and enables the air impeller (20) to rotate, and then the fan blades (30) rotate through the transmission mechanism.

2. A pneumatic smoke exhaust machine according to claim 1, wherein the side wall of the shell (10) is provided with an external convex part (13) corresponding to the position of the wind impeller (20), the external convex part (13) is arranged around the circumference of the side wall of the shell (10), and the external convex part (13) enables the inner wall of the shell (10) to form a corresponding concave part (14); the wind impeller (20) is eccentrically arranged in the shell (10), and the eccentric part of the wind impeller (20) is positioned in the concave part (14); the air inlet pipe (15) is arranged on the outer convex part (13) and is positioned close to the eccentric part of the wind impeller (20).

3. Pneumatic induced draft fan according to claim 2, further comprising an exhaust duct (16), said exhaust duct (16) being arranged on said outer protrusion (13) for discharging compressed air.

4. Pneumatic induced-draft fan according to claim 3, characterized in that the included angle between the axis of the air inlet pipe (15) or the air outlet pipe (16) and the normal of the fan blade wheel (20) at the corresponding position is 90-150 °.

5. A pneumatic smoke exhaust machine according to claim 2, wherein said transmission mechanism comprises a first gear and a second gear which are engaged with each other; the first gear is coaxially connected with the wind impeller (20); the second gear is coaxially connected with the fan blades (30).

6. Pneumatic induced draft fan according to claim 5, characterized in that the first gear is an internal gear (41) and the second gear is an external gear (42).

7. A pneumatic extractor according to claim 6, further comprising at least two first supports (51), at least one second support (52), a first shaft (53), a second shaft (54), at least two first bearings (55) and at least one second bearing (56); the first bracket (51) and the second bracket (52) are fixed in the shell (10), the first end of the first shaft lever (53) is rotatably arranged on the first bracket (51) through a first bearing (55), and the second end of the first shaft lever (53) is coaxially connected with the first gear; the second shaft lever (54) is rotatably arranged on the second bracket (52) through a second bearing (56), the first end of the second shaft lever (54) is coaxially connected with the second gear, and the second end of the second shaft lever (54) is coaxially connected with the fan blade (30).

8. Pneumatic induced-draft fan according to claim 7, characterized in that the inner gear (41) is provided with a reinforcing frame (411); the second end of the first shaft (53) is coaxially connected with the first gear through a reinforcing frame (411).

9. Pneumatic smoke extractor according to any of the claims 1 to 8, wherein the diameter of the smoke suction (11) and the smoke outlet (12) is smaller than the diameter of the fan blades (30).

10. A pneumatic smoke exhaust fan according to claim 9, further comprising an elongated tube; the lengthening pipe is detachably connected with the smoking port (11).