Horizontal explosion-proof exhaust fan

Abstract

The utility model relates to the technical field of exhaust fans, and discloses a horizontal anti-explosion exhaust fan which comprises an exhaust pipeline, exhaust fans are fixedly installed on the front portion of the exhaust pipeline, a motor is fixedly installed between the two exhaust fans, an output shaft of the motor is movably connected in an inner cavity of the exhaust fans in a sleeved mode, an exhaust outlet is formed in the left end of the exhaust pipeline, and an air outlet is formed in the right end of the exhaust pipeline. Grating plates are evenly and fixedly installed in the exhaust outlets, a high-temperature-resistant coating is fixedly installed on the inner wall of a cavity of the exhaust pipeline, a liquid storage tank is fixedly installed on the upper portion of the exhaust pipeline, a conveying pipe is fixedly connected to the bottom of the liquid storage tank, and the upper portion of an inner cavity of the exhaust pipeline is fixedly sleeved with the conveying pipe; a spraying box is fixedly installed at the bottom end of the conveying pipe and located in an inner cavity of the exhaust pipeline, by arranging a glass body and utilizing thermal expansion and cold contraction of liquid, a fire extinguishing agent enters the exhaust pipeline in time, the smoke dust concentration and temperature are reduced, sparks are eliminated, the working efficiency of the device can be maintained, and the risk that the device deforms is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust fans, in particular to a horizontal explosion-proof exhaust fan. Background Art

[0002] An exhaust fan is a type of air-conditioning appliance that uses an electric motor to drive the rotation of blades to drive airflow, thereby exchanging indoor and outdoor air. It is also called an exhaust fan. The purpose of exhaust is to remove indoor polluted air and regulate temperature and humidity. It is widely used in homes and public places. Exhaust fans use air convection to keep the room in a negative pressure state, forming a suction force to expel the stuffy air in the room, thereby achieving the effect of ventilation and cooling. Exhaust fans play an important role in the event of a fire.

[0003] When a fire occurs, the smoke will carry sparks and the temperature angle will increase, causing the temperature inside the exhaust fan cavity to rise. Existing exhaust fans are mostly made of metal, which will be deformed by thermal expansion and contraction, causing interference with the normal operation of the device and not conducive to maintaining good working efficiency of the device. At the same time, the discharge of sparks and the like may cause the fire to expand, and in severe cases, lead to explosions. Therefore, in order to solve the above problems, the utility model proposes a horizontal explosion-proof exhaust fan. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a horizontal explosion-proof exhaust fan. By setting a glass body and utilizing the characteristics of liquid thermal expansion and contraction, the fire extinguishing agent can be sprayed into the exhaust duct in time when a fire occurs, eliminating sparks in the smoke and dust, reducing the concentration and temperature of the smoke and dust, avoiding deformation of the exhaust duct due to heat, maintaining stable operation of the device, and ensuring good working efficiency of the device.

[0005] The utility model provides the following technical solutions: a horizontal explosion-proof exhaust fan, comprising an exhaust duct, an exhaust fan fixedly installed at the front of the exhaust duct, two exhaust fans symmetrically distributed on the left and right, a motor fixedly installed between the two exhaust fans, the motor output shaft movably sleeved in the exhaust fan inner cavity, an exhaust port opened at the left end of the exhaust duct, grille plates evenly fixedly installed in the exhaust port, a high-temperature resistant coating fixedly installed on the inner wall of the exhaust duct cavity, a liquid storage tank fixedly installed on the upper part of the exhaust duct, a delivery pipe fixedly connected to the bottom of the liquid storage tank, and the delivery pipe fixed sleeve A spray box is connected to the upper part of the inner cavity of the exhaust duct, and the bottom end of the delivery pipe is fixedly installed in the inner cavity of the exhaust duct. A glass body is evenly fixedly sleeved on the bottom of the inner cavity of the spray box. There are four glass bodies. A baffle is fixedly installed on the bottom end of the glass body. Connecting arms are symmetrically fixedly installed on the upper part of the baffle and on the left and right sides of the glass body. The top end of the connecting arm is fixedly installed on the bottom of the spray box. By arranging the glass body and utilizing the thermal expansion and contraction of the liquid, the fire extinguishing agent can be easily introduced into the device in time to reduce the smoke concentration and temperature, eliminate sparks, and help the device maintain good working efficiency to prevent the device from being deformed by heat.

[0006] Preferably, a fixed shaft is fixedly sleeved in the inner cavity of the exhaust duct and located to the right of the grille plate, and a sleeve is movably sleeved on the fixed shaft. There are two sleeves and they are symmetrically distributed front to back. By arranging the sleeve on the fixed shaft, the airflow inside the exhaust duct can be unobstructed when the exhaust mechanism is working, which is beneficial for the device to adjust the unobstructedness of the exhaust duct.

[0007] Preferably, a vortex spring is fixedly installed between the sleeve and the fixed shaft, baffles are fixedly installed on opposite sides of the two sleeves, and a fireproof seal is fixedly installed on the left side of the baffle. The vortex spring allows the baffle to return to a vertical position using elastic potential energy when the exhaust mechanism is in operation, thereby avoiding the backflow of external air.

[0008] Preferably, the upper and lower parts of the inner cavity of the exhaust duct are respectively provided with cavities, and the cavities are located on the left side of the baffle. An electric push rod is fixedly installed in the cavity, and the electric push rod drives the limiting mechanism to move, thereby adjusting the exhaust duct, which greatly improves the practicality of the device and effectively prevents the fire from spreading and causing an explosion.

[0009] Preferably, a movable plate is fixedly installed at the telescopic end of the electric push rod, and a lifting block is fixedly installed on the side of the movable plate away from the electric push rod. The lifting block is movably connected to the cavity, and a fireproof seal 2 is fixedly installed on the right side of the lifting block. By setting the fireproof seal 1 in contact with the fireproof seal 2, the sealing performance in the inner cavity of the exhaust duct is increased, and the air flow inside the device is isolated, which is conducive to forming a closed environment in the inner cavity of the exhaust duct, reducing the oxygen content in the device, and effectively preventing the flame from overflowing and causing the disaster to expand.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The device is protected by the high-temperature resistant coating on the inner wall of the exhaust duct. The liquid in the inner cavity of the vitreous body expands when it senses high temperature. The vitreous body ruptures, allowing the foam fire extinguishing agent stored in the liquid storage tank to enter the spray box through the delivery pipe and spray out from the ruptured vitreous body. The foam fire extinguishing agent hits the baffle and splashes into the inner cavity of the exhaust duct from the gap between the baffle and the connecting arm, thereby forming a larger spraying area, which is conducive to eliminating sparks in the smoke and reducing the smoke concentration. At the same time, it can cool the smoke and avoid deformation of the exhaust duct due to heat, maintain stable operation of the device, and enable the device to maintain good working efficiency.

[0012] 2. When the fire is too big and the exhaust duct needs to be sealed, the telescopic end of the electric push rod drives the movable plate to move in the cavity, so that the lifting block moves out of the cavity. The lifting block resists the baffle to limit its rotation. At the same time, the fire seal 1 contacts the fire seal 2, increasing the sealing of the inner cavity of the exhaust duct, isolating the air flow inside the device, forming a closed environment in the inner cavity of the exhaust duct, reducing the oxygen content in the device, avoiding the expansion of the fire and explosion, and effectively preventing the flame from spilling out and causing the disaster to expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the exterior structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 For this utility model Figure 2 A in the middle is an enlarged schematic diagram;

[0016] Figure 4 For this utility model Figure 2 The enlarged schematic diagram of point B in the middle;

[0017] Figure 5 This is a schematic diagram of the baffle structure of the utility model.

[0018] In the figure: 1. Exhaust duct; 2. Exhaust fan; 3. Motor; 4. Exhaust port; 5. Grille plate; 6. High-temperature resistant coating; 7. Liquid storage tank; 8. Delivery pipe; 9. Spray box; 10. Glass body; 11. Baffle; 12. Connecting arm; 13. Fixed shaft; 14. Sleeve; 15. Volute spring; 16. Baffle; 17. Fire seal 1; 18. Cavity; 19. Electric push rod; 20. Moving plate; 21. Lifting block; 22. Fire seal 2. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5 A horizontal explosion-proof exhaust fan includes an exhaust duct 1, an exhaust fan 2 is fixedly installed at the front of the exhaust duct 1, the number of exhaust fans 2 is two and they are symmetrically distributed on the left and right, a motor 3 is fixedly installed between the two exhaust fans 2, the output shaft of the motor 3 is movably sleeved in the inner cavity of the exhaust fan 2, an exhaust port 4 is opened at the left end of the exhaust duct 1, a grille plate 5 is evenly fixedly installed in the exhaust port 4, a high-temperature resistant coating 6 is fixedly installed on the inner wall of the exhaust duct 1 cavity, a liquid storage tank 7 is fixedly installed on the upper part of the exhaust duct 1, and the liquid storage tank 7 The bottom is fixedly connected with a delivery pipe 8, which is fixedly sleeved on the upper part of the inner cavity of the exhaust duct 1. A spray box 9 is fixedly installed at the bottom of the delivery pipe 8 and located in the inner cavity of the exhaust duct 1. Glass bodies 10 are evenly fixedly sleeved on the bottom of the inner cavity of the spray box 9. There are four glass bodies 10. A baffle 11 is fixedly installed at the bottom of the glass body 10. A connecting arm 12 is symmetrically fixedly installed on the upper part of the baffle 11 and located on the left and right sides of the glass body 10. The top of the connecting arm 12 is fixedly installed at the bottom of the spray box 9. After the device is placed, When the fire extinguisher 1 is in the open position, the exhaust fan 2 is turned on and the exhaust fan 2 is turned on and the exhaust fan 2 is turned on and the exhaust fan 2 is turned on and the exhaust fan 2 is turned on and the exhaust fan 2 is turned on. When the fire extinguisher 1 is in the open position, the exhaust fan 2 is turned on and the exhaust fan 2 is turned on and the exhaust fan 2 is turned on. When the fire extinguisher 1 is in the open position, the exhaust fan 2 is turned on and the exhaust fan 2 is turned on, the exhaust fan 2 is turned on and the exhaust fan 2 is turned on.

[0021] A fixed shaft 13 is fixedly sleeved in the inner cavity of the exhaust duct 1 and is located on the right side of the grille plate 5. A sleeve 14 is movably sleeved on the fixed shaft 13. There are two sleeves 14 and they are symmetrically distributed front to back. A volute spring 15 is fixedly installed between the sleeve 14 and the fixed shaft 13. Baffles 16 are fixedly installed on the opposite sides of the two sleeves 14. A fireproof seal 17 is fixedly installed on the left side of the baffle 16. Cavities 18 are respectively provided in the upper and lower parts of the inner cavity of the exhaust duct 1. The cavity 18 is located on the left side of the baffle 16. An electric push rod 19 is fixedly installed in the cavity 18. A movable plate 20 is fixedly installed on the telescopic end of the electric push rod 19. A lifting block 21 is fixedly installed on the side of the movable plate 20 away from the electric push rod 19. The lifting block 21 is movably sleeved with the cavity 18, and a fireproof seal 2 is fixedly installed on the right side of the lifting block 21. 2. When the air in the inner cavity of the exhaust duct 1 accelerates to flow, the airflow provides pressure to the baffle 16 to rotate the sleeve 14, so that the inner cavity of the exhaust duct 1 is connected. When the motor 3 is turned off, the baffle 16 returns to the vertical position under the action of the spiral spring 15. When the fire is too large and the exhaust duct 1 needs to be blocked, the movable plate 20 is driven to move in the cavity 18 by the telescopic end of the electric push rod 19, so that the lifting block 21 is moved out of the cavity 18. The lifting block 21 resists the baffle 16 to limit its rotation. At the same time, the fire seal 17 contacts the fire seal 2 22, which increases the sealing of the inner cavity of the exhaust duct 1 and isolates the air flow inside the device, so that the inner cavity of the exhaust duct 1 forms a closed environment, reduces the oxygen content in the device, avoids the expansion of the fire and explosion, and effectively prevents the flame from overflowing and causing the disaster to expand.

[0022] Working principle: After the device is installed, start the motor 3 to drive the exhaust fan 2 to run, and the exhaust fan 2 drives the air in the inner cavity of the exhaust duct 1 to flow. The airflow provides pressure to the baffle 16 to rotate the sleeve 14, so that the inner cavity of the exhaust duct 1 is connected. When the motor 3 is turned off, the baffle 16 returns to the vertical position under the action of the spiral spring 15, and the device sucks out the indoor air and discharges it to the outside through the exhaust port 4. When a fire occurs, smoke and dust containing sparks enter the inner cavity of the exhaust duct 1. The high-temperature resistant coating 6 on the inner wall of the exhaust duct 1 can provide protection for the exhaust duct 1. Since the glass body 10 is filled with liquid, after sensing the higher temperature of the smoke and dust in the inner cavity of the exhaust duct 1, the liquid Thermal expansion and contraction cause the glass body 10 to rupture, allowing the foam fire extinguishing agent stored in the liquid storage tank 7 to enter the spray box 9 through the delivery pipe 8 and be sprayed out from the ruptured glass body 10. The foam fire extinguishing agent hits the baffle 11 and splashes into the inner cavity of the exhaust duct 1 from the gap between the baffle 11 and the connecting arm 12, thereby forming a larger spraying area. When the fire is too large and the exhaust duct 1 needs to be sealed, the movable plate 20 is driven to move in the cavity 18 by the telescopic end of the electric push rod 19, so that the lifting block 21 is moved out of the cavity 18. The lifting block 21 resists the baffle 16 to limit its rotation. At the same time, the fire seal 17 contacts the fire seal 2 22, thereby increasing the sealing of the inner cavity of the exhaust duct 1.

Claims

1. A horizontal explosion-proof exhaust fan, comprising an exhaust duct (1), characterized in that: An exhaust fan (2) is fixedly installed at the front of the exhaust duct (1), the number of the exhaust fans (2) is two and they are symmetrically distributed on the left and right, a motor (3) is fixedly installed between the two exhaust fans (2), the output shaft of the motor (3) is movably sleeved in the inner cavity of the exhaust fan (2), an exhaust port (4) is opened at the left end of the exhaust duct (1), a grille plate (5) is evenly fixedly installed in the exhaust port (4), a high-temperature resistant coating (6) is fixedly installed on the inner wall of the cavity of the exhaust duct (1), a liquid storage tank (7) is fixedly installed on the upper part of the exhaust duct (1), and the bottom of the liquid storage tank (7) is fixed. A delivery pipe (8) is connected, and the delivery pipe (8) is fixedly sleeved on the upper part of the inner cavity of the exhaust duct (1). A spray box (9) is fixedly installed at the bottom end of the delivery pipe (8) and located in the inner cavity of the exhaust duct (1). Glass bodies (10) are evenly fixedly sleeved on the bottom of the inner cavity of the spray box (9). The number of the glass bodies (10) is four. A baffle (11) is fixedly installed at the bottom end of the glass body (10). Connecting arms (12) are symmetrically fixedly installed on the upper part of the baffle (11) and located on the left and right sides of the glass body (10). The top end of the connecting arm (12) is fixedly installed on the bottom of the spray box (9).

2. A horizontal explosion-proof exhaust fan according to claim 1, characterized in that: A fixed shaft (13) is fixedly sleeved in the inner cavity of the exhaust duct (1) and located just to the right of the grille plate (5). A sleeve (14) is movably sleeved on the fixed shaft (13). There are two sleeves (14) that are symmetrically distributed front to back.

3. A horizontal explosion-proof exhaust fan according to claim 2, characterized in that: A volute spring (15) is fixedly installed between the sleeve (14) and the fixed shaft (13), baffles (16) are fixedly installed on opposite sides of the two sleeves (14), and a fireproof seal (17) is fixedly installed on the left side of the baffle (16).

4. A horizontal explosion-proof exhaust fan according to claim 3, characterized in that: The exhaust duct (1) has cavities (18) respectively formed in the upper and lower parts of its inner cavity. The cavity (18) is located to the left of the baffle (16). An electric push rod (19) is fixedly installed in the cavity (18).

5. A horizontal explosion-proof exhaust fan according to claim 4, characterized in that: A movable plate (20) is fixedly mounted on the telescopic end of the electric push rod (19), a lifting block (21) is fixedly mounted on the side of the movable plate (20) away from the electric push rod (19), the lifting block (21) is movably connected to the cavity (18), and a second fireproof seal (22) is fixedly mounted on the right side of the lifting block (21).

Images