An explosion-proof axial flow fire smoke exhaust fan

Abstract

This utility model relates to the field of fire-fighting smoke exhaust fan technology, and discloses an explosion-proof axial flow fire-fighting smoke exhaust fan, including a fan structure, and further including: an installation mechanism and a fan blade mechanism. The fan structure includes a support frame, and a duct is fixedly connected to the top of the support frame. A guide plate is fixedly connected to the inner wall of the side of the duct, and the guide plate is parallel to the central axis of the duct. The duct has a conical structure, and smoke enters the duct from the smaller diameter end. This utility model drives a drive motor to rotate the transmission shaft, thereby driving the fan blade mechanism to rotate and generate thrust, so that the smoke from outside the duct enters the duct from the right side, is guided by the guide plate into a straight airflow along the duct axis, and is finally discharged from the left side of the duct. This reduces the resistance of smoke in the air, and because the diameter of the duct outlet is larger than the diameter of the inlet, the pressure at the duct outlet is reduced, releasing the internal pressure of the duct and preventing heat from accumulating inside the duct, which is beneficial to improving equipment safety.

Description

Technical Field

[0001] This utility model relates to the field of fire smoke exhaust fan technology, and more specifically to an explosion-proof axial flow fire smoke exhaust fan. Background Technology

[0002] Fire exhaust fans are important facilities for ensuring building fire safety. They use high-power motors and efficient impeller designs to quickly remove large amounts of smoke, reduce the impact of smoke on visibility and breathing, and create favorable conditions for fire rescue operations. Axial flow exhaust fans are a common type, which use the thrust of the blades to force the gas to flow axially.

[0003] Insufficient technology: The blades of existing fire exhaust fans are mostly fixed, which cannot adjust the angle of the blades according to the usage requirements to regulate the air intake. Moreover, the complex environment during smoke exhaust can easily damage the blades. The fixed structure also makes it inconvenient to replace the blades. When the blades rotate, the smoke enters the fan and is then discharged. However, the rotation of the blades can easily generate eddies, which swirl in the air and cannot effectively blow the smoke to a distance. The smoke carries a lot of heat, and as it is used, the heat and smoke accumulate at the tail of the fan, which can easily lead to reignition and affect the safety of the equipment. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an explosion-proof axial flow fire smoke exhaust fan to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof axial flow fire-fighting smoke exhaust fan, comprising a fan structure, and further comprising: an installation mechanism and a fan blade mechanism. The inner side wall of the fan structure is movably sleeved with the side of the installation mechanism, and the side of the fan blade mechanism is movably connected to the side of the installation mechanism. The fan structure includes a support frame, and a duct is fixedly connected to the top of the support frame. A guide plate is fixedly connected to the inner side wall of the duct, and the guide plate is parallel to the central axis of the duct. A housing is fixedly connected to the inner side wall of the guide plate, and a drive motor is fixedly connected to the inner side wall of the housing. The installation mechanism includes a transmission shaft, and the side of the transmission shaft is movably sleeved with the side of the housing. The side of the transmission shaft is fixedly connected to the side of the drive motor. The side of the fan blade mechanism is fixedly connected to the side of the transmission shaft. The duct has a conical structure, and smoke enters the duct from the smaller diameter end.

[0006] Furthermore, the two ends of the housing are tapered structures, and a protective cover is movably connected to the side of the drive shaft via an elastic clip.

[0007] Furthermore, the transmission shaft has a mounting groove on its side, the fan blade mechanism includes a mounting base, a connecting shaft is movably sleeved on the side of the mounting base, the fan blade body is fixedly connected to the side of the connecting shaft, the side of the mounting base is movably connected to the side of the mounting groove, and the side of the mounting groove is fixed to the side of the mounting base by bolts.

[0008] Furthermore, an adjusting rod is movably sleeved on the side of the drive shaft, and a driving gear is fixedly connected to the side of the adjusting rod. A cavity is opened inside the drive shaft, and a mounting shaft is movably sleeved on the side of the mounting groove. A driven bevel gear is fixedly connected to the bottom end of the mounting shaft, and the side of the driven bevel gear meshes with the side of the driving gear. A locking block is fixedly connected to the top end of the mounting shaft, and a locking groove is opened on the side of the connecting shaft. The side of the locking groove meshes with the side of the locking block.

[0009] Furthermore, the card block has a rectangular structure, and the sides of the card block have rounded corners.

[0010] Furthermore, the side of the adjusting rod is provided with a hexagonal groove, and a fastening nut is threaded onto the side of the adjusting rod.

[0011] Furthermore, a protective net is fixedly connected to the side of the support frame.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model uses a drive motor to rotate the transmission shaft, which in turn drives the fan blade mechanism to rotate and generate thrust. This allows external smoke to enter the air duct from the right side, be guided by the guide plate into a straight airflow along the air duct axis, and finally be discharged from the left side of the air duct. This reduces the resistance of the smoke in the air. Furthermore, because the diameter of the air duct outlet is larger than the diameter of the air inlet, the pressure at the air duct outlet is reduced, releasing the internal pressure of the air duct and preventing heat from accumulating inside the air duct, which is beneficial to improving equipment safety.

[0014] This invention allows a hexagonal wrench to be inserted into a hexagonal slot by loosening the fastening nut, which in turn rotates the adjusting rod, causing the drive gear to rotate. The driven bevel gear meshes with the drive gear, causing the mounting shaft to rotate, thereby rotating the fan blade body and adjusting its angle. Finally, the fastening nut is tightened to fix the adjusting rod, thus securing the fan blade body. This improves the flexibility of the equipment and meets different usage needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the fan structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the installation mechanism structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the transmission shaft structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the drive shaft of this utility model;

[0020] Figure 6 This is a schematic diagram of the fan blade mechanism of this utility model.

[0021] The attached figures are labeled as follows: 1. Fan structure; 101. Support frame; 102. Fan casing; 103. Drive motor; 104. Housing; 105. Guide plate; 106. Protective net; 2. Mounting mechanism; 201. Drive shaft; 202. Drive gear; 203. Mounting groove; 204. Locking block; 205. Adjusting rod; 206. Mounting shaft; 207. Protective cover; 208. Hexagonal groove; 209. Fastening nut; 210. Driven bevel gear; 3. Fan blade mechanism; 301. Fan blade body; 302. Mounting base; 303. Connecting shaft; 304. Locking groove. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The explosion-proof axial flow fire exhaust fan involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1 to 6This utility model provides an explosion-proof axial flow fire-fighting smoke exhaust fan, including a fan structure 1, and further including: an installation mechanism 2 and a fan blade mechanism 3. The inner side wall of the fan structure 1 is movably sleeved with the side of the installation mechanism 2, and the side of the fan blade mechanism 3 is movably connected with the side of the installation mechanism 2. The fan structure 1 includes a support frame 101, and a duct 102 is fixedly connected to the top of the support frame 101. A guide plate 105 is fixedly connected to the inner side wall of the duct 102, and the guide plate 105 is parallel to the central axis of the duct 102. A housing 104 is fixedly connected to the inner side wall of the guide plate 105, and a drive motor 103 is fixedly connected to the inner side wall of the housing 104. The installation mechanism 2 includes a drive shaft 201, the side of the drive shaft 201 is movably sleeved with the side of the housing 104, and the side of the drive shaft 201 is connected to the drive motor. The side of the fan blade mechanism 3 is fixedly connected to the side of the transmission shaft 201. The air duct 102 has a conical structure, and the smoke enters the air duct 102 from the small diameter end. The guide plate 105 is evenly distributed inside the air duct 102. When the equipment is running, the drive motor 103 drives the transmission shaft 201 to rotate, thereby driving the fan blade mechanism 3 to rotate and generate thrust, so that the smoke from the outside of the air duct 102 enters the air duct 102 from the right side of the air duct 102. After being guided by the guide plate 105, it is a straight wind along the axis of the air duct 102 and finally discharged from the left side of the air duct 102, reducing the resistance of the smoke in the air. Since the diameter of the air outlet of the air duct 102 is larger than the diameter of the air inlet, the pressure at the air outlet of the air duct 102 is reduced, the internal pressure of the air duct 102 is released, heat is prevented from accumulating inside the air duct 102, and the safety of the equipment is improved.

[0024] The housing 104 has tapered ends, and the side of the drive shaft 201 is movably connected to a protective cover 207 via an elastic clip to reduce the air resistance of the housing 104.

[0025] The drive shaft 201 has a mounting groove 203 on its side. The fan blade mechanism 3 includes a mounting base 302. A connecting shaft 303 is movably sleeved on the side of the mounting base 302. The fan blade body 301 is fixedly connected to the side of the connecting shaft 303. The side of the mounting base 302 is movably connected to the side of the mounting groove 203. The side of the mounting groove 203 and the side of the mounting base 302 are fixed by bolts. The mounting base 302 is inserted into the mounting groove 203 and fixed inside the mounting groove 203 by bolts, thus ensuring the safety of the fan blade mechanism 3. The fan blade mechanism 3 consists of four independent structures, which facilitates the replacement and maintenance of individual fan blade mechanisms 3.

[0026] The transmission shaft 201 has an adjusting rod 205 movably sleeved on its side, and a drive gear 202 is fixedly connected to the side of the adjusting rod 205. The transmission shaft 201 has an internal cavity. The mounting groove 203 has a mounting shaft 206 movably sleeved on its side, and a driven bevel gear 210 is fixedly connected to the bottom end of the mounting shaft 206. The side of the driven bevel gear 210 meshes with the side of the drive gear 202. A locking block 204 is fixedly connected to the top end of the mounting shaft 206. The connecting shaft 303 has a locking groove 304 on its side, and the side of the locking groove 304 meshes with the side of the locking block 204. When the mounting seat 302 is inserted into the mounting groove 203, the locking block 204 is inserted into the locking groove 304. According to the usage requirements, rotating the adjusting rod 205 drives the drive gear 202 to rotate. Through the meshing of the driven bevel gear 210 and the drive gear 202, the mounting shaft 206 is rotated, thereby driving the fan blade body 301 to rotate and adjusting the angle of the fan blade body 301.

[0027] The card block 204 has a rectangular structure and rounded corners on its side.

[0028] The adjusting rod 205 has a hexagonal groove 208 on its side and a fastening nut 209 threaded onto its side. When the fan blade body 301 needs to be adjusted, loosen the fastening nut 209 and insert a hexagonal wrench into the hexagonal groove 208 to rotate the adjusting rod 205. After adjustment, tighten the fastening nut 209 to fix the adjusting rod 205, thereby fixing the fan blade body 301.

[0029] The support frame 101 is fixedly connected to a protective net 106 on its side to prevent debris from entering the air duct 102 and damaging the fan blade mechanism 3.

[0030] The working principle of this utility model is as follows: When the fan blade mechanism 3 needs to be replaced or maintained, unscrew the side bolts of the mounting base 302, remove the mounting base 302, replace the fan blade mechanism 3, and then insert the new mounting base 302 into the mounting groove 203, and insert the locking block 204 into the locking groove 304. Fix the mounting base 302 in the mounting groove 203 with bolts. According to the usage requirements, remove the protective cover 207, loosen the fastening nut 209, insert the hexagonal wrench into the hexagonal slot 208, drive the adjusting rod 205 to rotate, drive the driving gear 202 to rotate, and through the meshing of the driven bevel gear 210 and the driving gear 202, drive the mounting shaft 206 to rotate, thereby driving the fan blade body 301 to rotate, and adjust the fan blade body 3. After adjusting the adjustment rod 205 by tightening the fastening nut 209 at an angle of 01, the fan blade body 301 is fixed. Then, the protective cover 207 is put on. When the equipment is running, the drive motor 103 drives the transmission shaft 201 to rotate, thereby driving the fan blade mechanism 3 to rotate and generate thrust. This causes the external smoke to enter the inside of the air duct 102 from the right side of the air duct 102. The smoke is then guided by the guide plate 105 into a straight airflow along the axis of the air duct 102 and finally discharged from the left side of the air duct 102. This reduces the resistance of the smoke in the air. Also, because the diameter of the air outlet of the air duct 102 is larger than the diameter of the air inlet, the pressure at the air outlet of the air duct 102 is reduced, releasing the internal pressure of the air duct 102 and preventing heat from accumulating inside the air duct 102, thus improving the safety of the equipment.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-explosion axial flow type fire smoke exhaust fan comprising a fan structure (1), characterized in that, Also includes: The fan structure (1) includes a mounting mechanism (2) and a fan blade mechanism (3). The inner side wall of the fan structure (1) is movably sleeved with the side of the mounting mechanism (2), and the side of the fan blade mechanism (3) is movably connected with the side of the mounting mechanism (2). The fan structure (1) includes a support frame (101). A wind duct (102) is fixedly connected to the top of the support frame (101). A guide plate (105) is fixedly connected to the inner side wall of the wind duct (102), and the guide plate (105) is parallel to the central axis of the wind duct (102). The inner side wall of the guide plate (105) is... A housing (104) is fixedly connected, and a drive motor (103) is fixedly connected to the inner side wall of the housing (104). The mounting mechanism (2) includes a drive shaft (201), the side of the drive shaft (201) is movably sleeved with the side of the housing (104), the side of the drive shaft (201) is fixedly connected to the side of the drive motor (103), the side of the fan blade mechanism (3) is fixedly connected to the side of the drive shaft (201), and the air duct (102) is a conical structure, with smoke entering the air duct (102) from the small diameter end.

2. The explosion-proof axial flow fire smoke exhaust fan of claim 1, wherein: The two ends of the housing (104) are tapered structures, and the side of the drive shaft (201) is movably connected to a protective cover (207) via an elastic clip.

3. The explosion-proof axial flow fire-fighting smoke exhaust fan according to claim 1, characterized in that: The drive shaft (201) has a mounting groove (203) on its side. The fan blade mechanism (3) includes a mounting base (302). A connecting shaft (303) is movably sleeved on the side of the mounting base (302). The fan blade body (301) is fixedly connected to the side of the connecting shaft (303). The side of the mounting base (302) is movably connected to the side of the mounting groove (203). The side of the mounting groove (203) is fixed to the side of the mounting base (302) by bolts.

4. The explosion-proof axial flow fire-fighting smoke exhaust fan according to claim 3, characterized in that: An adjusting rod (205) is movably sleeved on the side of the drive shaft (201), and a driving gear (202) is fixedly connected to the side of the adjusting rod (205). A cavity is opened inside the drive shaft (201). An mounting shaft (206) is movably sleeved on the side of the mounting groove (203). A driven bevel gear (210) is fixedly connected to the bottom end of the mounting shaft (206). The side of the driven bevel gear (210) meshes with the side of the driving gear (202). A locking block (204) is fixedly connected to the top end of the mounting shaft (206). A locking groove (304) is opened on the side of the connecting shaft (303). The side of the locking groove (304) meshes with the side of the locking block (204).

5. The explosion-proof axial flow fire-fighting smoke exhaust fan according to claim 4, characterized in that: The card block (204) has a rectangular structure, and the side of the card block (204) has rounded corners.

6. The explosion-proof axial flow fire-fighting smoke exhaust fan according to claim 4, characterized in that: The adjusting rod (205) has a hexagonal groove (208) on its side, and a fastening nut (209) is threaded onto the side of the adjusting rod (205).

7. The explosion-proof axial flow fire-fighting smoke exhaust fan according to claim 1, characterized in that: A protective net (106) is fixedly connected to the side of the support frame (101).

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