Low-noise fire-fighting smoke exhaust fan

Abstract

The utility model relates to the field of smoke exhaust fans, and discloses a low-noise fire-fighting smoke exhaust fan which comprises an equipment base and a protective shell fixedly installed on the upper end face of the equipment base, an air guide cover is fixedly installed on the upper end face of the protective shell, and an air inlet cover is fixedly installed on the front side of the side wall of the protective shell. Supporting fork feet are fixedly installed on the lower end face of the equipment base, buffering assemblies are arranged in inner cavities of the supporting fork feet, an impeller disc is arranged in the middle of an inner cavity of the protection shell, a driving assembly is arranged on the lower end face of the impeller disc, and a noise reduction plate is placed on the front side of an inner cavity of the air inlet cover. A mounting assembly is arranged on the upper portion of the side wall of the air inlet cover. The driving assembly is matched with the impeller disc, the functions of air suction and smoke exhaust can be achieved, meanwhile, the buffering assembly and the noise reduction plate are additionally arranged, noise generated by vibration of the whole equipment and impact of sucked air on the inner wall of the equipment when the whole equipment works can be reduced, and it is guaranteed that the whole equipment can operate on the premise of low noise.

Description

Technical Field

[0001] The utility model relates to the field of smoke exhaust fans, in particular to a low-noise fire-fighting smoke exhaust fan. Background Art

[0002] "Firefighting" means eliminating hidden dangers and preventing disasters. It is a general term for preventing and solving man-made, natural and accidental disasters encountered by people in the process of life, work and study. Of course, in the narrow sense, it means putting out fires in the early stage of people's understanding.

[0003] One of the fire fighting equipments often used in fire fighting is the smoke exhaust fan, which is a machine that can quickly exhaust the odor, high temperature and oil smoke generated in the production process. The machine is characterized by good high temperature resistance and high efficiency. However, some existing smoke exhaust fans will inevitably generate a lot of noise when working due to the high-speed rotation of the motor and the fan blades. The noise will affect the health of workers and interfere with the production environment. For smoke exhaust fans near living areas, the noise generated will cause serious noise pollution. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] The utility model aims to provide a low-noise fire smoke exhaust fan to solve the problem of high noise in the existing smoke exhaust fans during operation as mentioned in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a low-noise fire smoke exhaust fan, comprising an equipment base, and a protective shell fixedly installed on the upper end surface of the equipment base, the upper end surface of the protective shell is fixedly installed with an air guide cover, the front side of the side wall of the protective shell is fixedly installed with an air inlet cover, the lower end surface of the equipment base is fixedly installed with a supporting fork foot, the inner cavity of the supporting fork foot is provided with a buffer assembly, the middle part of the inner cavity of the protective shell is provided with an impeller disk, the lower end surface of the impeller disk is provided with a driving assembly, a noise reduction plate is placed on the front side of the inner cavity of the air inlet cover, and an installation assembly is provided on the upper part of the side wall of the air inlet cover.

[0008] Preferably, the buffer assembly includes a buffer cylinder slidably mounted in the inner cavity of the supporting fork leg, and a support pad detachably mounted on the lower end surface of the buffer cylinder, a buffer plate is fixedly mounted on the middle part of the bottom surface of the inner cavity of the buffer cylinder, and a top cover is fixedly mounted on the upper end surface of the buffer cylinder.

[0009] Preferably, the support pad is made of nitrile rubber, a plurality of through holes are provided on the side wall of the buffer plate, a pressure relief hole is provided on the upper part of the side wall of the buffer cylinder, a water inlet connected to the buffer cylinder is provided in the middle part of the upper end surface of the top cover, and a total of 4 groups of buffer components are provided.

[0010] Preferably, the driving assembly includes a rotating column rotatably mounted on the lower end surface of the impeller disk, a worm gear is fixedly mounted on the lower portion of the side wall of the rotating column, a support plate is fixedly mounted on the front side of the upper end surface of the equipment base, a worm is rotatably mounted in the inner cavity of the support plate, and a servo motor is fixedly mounted on the side of the upper end surface of the equipment base close to the support plate through a frame.

[0011] Preferably, the worm is meshingly connected with the worm wheel, the output shaft end of the servo motor is fixedly connected with the worm, the worm is meshingly connected with the worm wheel, and the rotating column is rotatably mounted on the middle part of the upper end surface of the equipment base.

[0012] Preferably, a first impeller blade and a second impeller blade are fixedly mounted on the side wall of the impeller disk, the first impeller blade and the second impeller blade are staggered with each other, the chord length of the first impeller blade is greater than the chord length of the second impeller blade, the first impeller blade and the second impeller blade are both inclined, and sound-absorbing cotton is laid on the inner wall of the air guide cover.

[0013] Preferably, air inlet grooves are provided on the front and rear side walls of the noise reduction plate, and the air inlet grooves are symmetrically recessed inwardly. The mounting assembly includes a limit rod slidably mounted on the side wall of the air inlet cover, a handle plate is fixedly mounted on the upper end surface of the limit rod, a return spring is wound around the side wall of the limit rod, and both ends of the return spring are respectively fixedly connected to the side wall of the air inlet cover and the side wall of the handle plate, and the upper end surface of the noise reduction plate is provided with a snap-in groove corresponding to the limit rod.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. When the utility model is performing smoke exhaust in a fire scene, the first impeller blade and the second impeller blade are staggered with each other, the chord length of the first impeller blade is greater than the chord length of the second impeller blade, and the first impeller blade and the second impeller blade are both inclined, so that when the entire impeller disk is driven at a low speed, it can still achieve the air volume and air pressure achieved by the traditional fan at a high speed drive, while reducing energy consumption, improving exhaust efficiency, and reducing noise transmission. In addition, sound-absorbing cotton is laid on the inner wall of the air guide cover, so that when the smoke is discharged from the air guide cover, the force of the smoke hitting the inner wall of the equipment can also be buffered, thereby further improving the noise reduction effect of the entire equipment.

[0016] 2. When the utility model is performing smoke exhaust in a fire scene, when the outside air passes through the air inlet hood, through the setting of the noise reduction plate, since air inlet grooves are provided on the front and rear side walls of the noise reduction plate, and the air inlet grooves are symmetrically recessed inward, the outside air can gather and collide at the air inlet grooves at this time, so as to reduce the kinetic energy of the air entering the protective cover and impacting the inner wall later, thereby achieving the noise reduction effect of the entire equipment again to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model from a top view;

[0019] Figure 3 It is a schematic diagram of a partial structure of the utility model from a top view;

[0020] Figure 4 This is a schematic cross-sectional view of the buffer cylinder of the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the noise reduction plate of the utility model.

[0022] In the figure: 1. Equipment base; 11. Support fork foot; 2. Protective shell; 3. Air guide cover; 31. Sound-absorbing cotton; 4. Air inlet cover; 5. Buffer assembly; 51. Buffer cylinder; 511. Pressure relief hole; 52. Support pad; 53. Buffer plate; 54. Top cover; 6. Impeller disk; 7. Drive assembly; 71. Rotating column; 72. Worm gear; 73. Support plate; 74. Worm; 75. Servo motor; 61. First impeller blade; 62. Second impeller blade; 8. Noise reduction plate; 81. Inlet groove; 82. Engaging groove; 9. Installation assembly; 91. Limit rod; 92. Handle plate; 93. Reset spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution for a low-noise fire smoke exhaust fan: a low-noise fire smoke exhaust fan, comprising an equipment base 1, and a protective shell 2 fixedly installed on the upper end surface of the equipment base 1, an air guide cover 3 is fixedly installed on the upper end surface of the protective shell 2, an air inlet cover 4 is fixedly installed on the front side of the side wall of the protective shell 2, a supporting fork foot 11 is fixedly installed on the lower end surface of the equipment base 1, a buffer component 5 is arranged in the inner cavity of the supporting fork foot 11, an impeller disk 6 is arranged in the middle part of the inner cavity of the protective shell 2, a driving component 7 is arranged on the lower end surface of the impeller disk 6, a noise reduction plate 8 is placed on the front side of the inner cavity of the air inlet cover 4, and an installation component 9 is arranged on the upper part of the side wall of the air inlet cover 4.

[0025] Furthermore, the buffer assembly 5 includes a buffer cylinder 51 slidably mounted in the inner cavity of the supporting fork leg 11, and a support pad 52 detachably mounted on the lower end surface of the buffer cylinder 51, a buffer plate 53 is fixedly mounted in the middle of the inner cavity bottom surface of the buffer cylinder 51, and a top cover 54 is fixedly mounted on the upper end surface of the buffer cylinder 51;

[0026] The support pad 52 is made of nitrile rubber, a plurality of through holes are provided on the side wall of the buffer plate 53, a pressure relief hole 511 is provided on the upper side wall of the buffer cylinder 51, a water inlet connected to the buffer cylinder 51 is provided in the middle of the upper end surface of the top cover 54, and a total of 4 groups of buffer components 5 are provided.

[0027] Further, the driving assembly 7 includes a rotating column 71 rotatably mounted on the lower end surface of the impeller disc 6, a worm gear 72 is fixedly mounted on the lower part of the side wall of the rotating column 71, a support plate 73 is fixedly mounted on the front side of the upper end surface of the equipment base 1, a worm 74 is rotatably mounted in the inner cavity of the support plate 73, and a servo motor 75 is fixedly mounted on one side of the upper end surface of the equipment base 1 close to the support plate 73 through a frame;

[0028] The worm 74 is meshedly connected with the worm wheel 72 , the output shaft end of the servo motor 75 is fixedly connected with the worm 74 , the worm 74 is meshedly connected with the worm wheel 72 , and the rotating column 71 is rotatably installed at the middle of the upper end surface of the equipment base 1 .

[0029] Furthermore, a first impeller blade 61 and a second impeller blade 62 are fixedly mounted on the side wall of the impeller disk 6. The first impeller blade 61 and the second impeller blade 62 are staggered with each other. The chord length of the first impeller blade 61 is greater than the chord length of the second impeller blade 62. The first impeller blade 61 and the second impeller blade 62 are both inclined. Sound-absorbing cotton 31 is laid on the inner wall of the air guide cover 3.

[0030] Air inlet grooves 81 are provided on the front and rear side walls of the noise reduction plate 8, and the air inlet grooves 81 are symmetrically recessed. The mounting assembly 9 includes a limit rod 91 slidably mounted on the side wall of the air inlet cover 4, and a handle plate 92 is fixedly mounted on the upper end surface of the limit rod 91. A return spring 93 is wound around the side wall of the limit rod 91, and both ends of the return spring 93 are respectively fixedly connected to the side wall of the air inlet cover 4 and the side wall of the handle plate 92. A snap-fit ​​groove 82 corresponding to the limit rod 91 is provided on the upper end surface of the noise reduction plate 8.

[0031] Working principle: When working, the user starts the servo motor 75 to rotate the worm 74. Since the worm 74 is meshed with the worm wheel 72, the worm 74 will drive the worm wheel 72 to rotate the rotating column 71. That is, at this time, the first impeller blade 61 and the second impeller blade 62 on the impeller disk 6 can rotate at a high speed, so that the outside air enters the protective shell 1 through the air inlet cover 4 and is discharged from the air guide cover 3. At this time, the whole equipment can realize the function of discharging smoke during fire fighting;

[0032] The first impeller blade 61 and the second impeller blade 62 are arranged alternately, the chord length of the first impeller blade 61 is greater than the chord length of the second impeller blade 62, and the first impeller blade 61 and the second impeller blade 62 are arranged in an inclined shape, so that when the entire impeller disk 6 is driven at a low speed, it can still achieve the air volume and air pressure achieved by the traditional fan at a high speed, thereby reducing energy consumption while improving exhaust efficiency and reducing noise transmission. In addition, by laying sound-absorbing cotton 31 on the inner wall of the air guide cover 3, when the smoke is discharged from the air guide cover 3, the force of the smoke hitting the inner wall of the equipment can also be buffered, thereby further improving the noise reduction effect of the entire equipment;

[0033] When the whole equipment is working, the whole equipment will inevitably produce a certain vibration, and then the base 1 of the equipment will shake back and forth. The user lifts up and adds a proper amount of clean water from the water inlet of the top cover 54 to the buffer cylinder 51, so that the liquid level of the clean water is lower than the pressure relief hole 511 on the buffer cylinder 51. At this time, when the base 1 of the equipment shakes, the shaking force of the base 1 of the equipment will be transmitted to the clean water, causing the clean water to fluctuate in the buffer cylinder 51. At this time, the buffer plate 53 is fixedly installed in the middle of the bottom surface of the inner cavity of the buffer cylinder 51, and multiple groups of through holes are provided on the side wall of the buffer plate 53. When the clean water passes through the through holes on the buffer plate 53, the fluctuation frequency and amplitude of the clean water can be slowed down, reducing the squeezing of the clean water in the buffer cylinder 51 on the air in the buffer cylinder 51, and the shaking force of the base 1 of the equipment is unloaded again, thereby further ensuring the noise reduction efficiency of the whole equipment;

[0034] During firefighting, when the outside air passes through the air inlet hood 4, through the setting of the noise reduction plate 8, since the front and rear side walls of the noise reduction plate 8 are both provided with air inlet grooves 81, and the air inlet grooves 81 are symmetrically recessed inwardly, the outside air can gather and collide at the air inlet grooves 81 at this time, so as to reduce the kinetic energy of the air entering the protective cover 2 and hitting the inner wall later, and to a certain extent, the noise reduction effect of the whole equipment is achieved again. Since the whole equipment is used in firefighting, the noise reduction plate 8 can intercept dust and oil in the smoke. After the noise reduction plate 8 is used for a long time, the user can Pull up the handle plate 92 to compress the return spring 93. At this time, the limit rod 91 can withdraw from the inner cavity of the locking groove 82 on the noise reduction plate 8. At this time, the user can take out and disassemble the old noise reduction plate 8, and put the new noise reduction plate 8 into the inner cavity of the air inlet cover 4, loosen the handle plate 92, and the return spring 93 will be reset, allowing the limit rod 91 to return to the locking groove 82 on the noise reduction plate 8 again to fix the noise reduction plate 8. Through the above, the device can facilitate the user to disassemble and replace the noise reduction plate 8 to improve the user's work efficiency.

[0035] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A low-noise fire smoke exhaust fan, comprising an equipment base (1), and a protective shell (2) fixedly mounted on the upper end surface of the equipment base (1), an air guide cover (3) fixedly mounted on the upper end surface of the protective shell (2), and an air inlet cover (4) fixedly mounted on the front side of the side wall of the protective shell (2), characterized in that: A supporting fork leg (11) is fixedly mounted on the lower end surface of the equipment base (1), a buffer assembly (5) is arranged in the inner cavity of the supporting fork leg (11), an impeller disc (6) is arranged in the middle of the inner cavity of the protective shell (2), a driving assembly (7) is arranged on the lower end surface of the impeller disc (6), a noise reduction plate (8) is placed on the front side of the inner cavity of the air inlet cover (4), and a mounting assembly (9) is arranged on the upper part of the side wall of the air inlet cover (4).

2. A low-noise fire smoke exhaust fan according to claim 1, characterized in that: The buffer assembly (5) comprises a buffer cylinder (51) slidably mounted in the inner cavity of the supporting fork leg (11), and a support pad (52) detachably mounted on the lower end surface of the buffer cylinder (51); a buffer plate (53) is fixedly mounted in the middle of the bottom surface of the inner cavity of the buffer cylinder (51), and a top cover (54) is fixedly mounted on the upper end surface of the buffer cylinder (51).

3. A low-noise fire smoke exhaust fan according to claim 2, characterized in that: The support pad (52) is made of nitrile rubber, a plurality of through holes are provided on the side wall of the buffer plate (53), a pressure relief hole (511) is provided on the upper portion of the side wall of the buffer cylinder (51), a water inlet connected to the buffer cylinder (51) is provided in the middle portion of the upper end surface of the top cover (54), and a total of four groups of buffer components (5) are provided.

4. A low-noise fire smoke exhaust fan according to claim 1, characterized in that: The driving assembly (7) comprises a rotating column (71) rotatably mounted on the lower end surface of the impeller disk (6); a worm gear (72) is fixedly mounted on the lower portion of the side wall of the rotating column (71); a support plate (73) is fixedly mounted on the front side of the upper end surface of the device base (1); a worm (74) is rotatably mounted in the inner cavity of the support plate (73); and a servo motor (75) is fixedly mounted on the side of the upper end surface of the device base (1) close to the support plate (73) through a frame.

5. A low-noise fire smoke exhaust fan according to claim 4, characterized in that: The worm (74) is meshedly connected with the worm wheel (72), the output shaft end of the servo motor (75) is fixedly connected with the worm (74), the worm (74) is meshedly connected with the worm wheel (72), and the rotating column (71) is rotatably mounted on the middle part of the upper end surface of the equipment base (1).

6. A low-noise fire smoke exhaust fan according to claim 1, characterized in that: A first impeller blade (61) and a second impeller blade (62) are fixedly mounted on the side wall of the impeller disk (6); the first impeller blade (61) and the second impeller blade (62) are arranged alternately; the chord length of the first impeller blade (61) is greater than the chord length of the second impeller blade (62); the first impeller blade (61) and the second impeller blade (62) are both arranged in an inclined shape; and sound-absorbing cotton (31) is laid on the inner wall of the air guide cover (3).

7. A low-noise fire smoke exhaust fan according to claim 1, characterized in that: The front and rear side walls of the noise reduction plate (8) are both provided with air inlet grooves (81), and the air inlet grooves (81) are symmetrically recessed inwardly. The mounting assembly (9) comprises a limit rod (91) slidably mounted on the side wall of the air inlet cover (4), a handle plate (92) is fixedly mounted on the upper end surface of the limit rod (91), a return spring (93) is wound around the side wall of the limit rod (91), and the two ends of the return spring (93) are respectively fixedly connected to the side wall of the air inlet cover (4) and the side wall of the handle plate (92), and the upper end surface of the noise reduction plate (8) is provided with a snap-fit ​​groove (82) corresponding to the limit rod (91).

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