Explosion-proof fan with impact-resistant automatic temperature control mechanism

Abstract

The invention relates to the technical field of ventilation and explosion prevention, in particular to an explosion-proof fan with an anti-impact automatic temperature control mechanism, which comprises a mounting base, an upper assembly plate is mounted at the upper end of the mounting base through a damping base, and a casing internally provided with an impeller and a three-phase asynchronous motor positioned on one side of the casing are fixedly assembled at the upper end of the upper assembly plate. According to the anti-explosion fan with the impact-resistant automatic temperature control mechanism, the external temperature control housing externally connected with the high-pressure water pipe is arranged on the periphery of the input port, so that wind noise in the input port can be reduced in idle hours, and meanwhile, the temperature of input air can be reduced; a temperature control mechanism is mounted on the inner side of the explosion-proof assembly on the inner side inclined surface of the flow guide cavity, and once high-temperature or burning air is pumped into the input port, high-pressure water can be automatically sprayed to the inner side of the explosion-proof assembly, so that the temperature of the pumped air is reduced, fire extinguishing treatment is performed on the interior, and meanwhile, the interior of the whole machine shell is cooled; and the safety and durability of the fan are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation explosion-proof, in particular to an explosion-proof fan with an impact-resistant automatic temperature-control mechanism. Background Art

[0002] A ventilator is a machine that relies on mechanical energy to increase the gas delivery capacity inside a pipeline. Ventilators are widely used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Since certain specific production links may produce flammable and explosive hazardous substances, in order to reduce the density of flammable and explosive substances inside and prevent sparks or static sparks from causing explosions, it is necessary to use explosion-proof ventilators to quickly extract them outdoors. The explosion-proof ventilators on the market simply set explosion-proof nets at the input and output ports to reduce the impact on the impeller, but once combustion and explosion occur, the instantaneous impact and high temperature will cause impacts on the explosion-proof net and the fan impeller, and will also cause the fan housing temperature to be too high, seriously affecting the fan's operating stability and service life. It is also impossible to quickly reduce the temperature of the air outlet, which can easily affect the surrounding environment. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the explosion-proof ventilators on the market are only simple passive explosion-proof and cannot control the temperature of the air at the input port. The high-temperature air, flames and impact drawn in will seriously affect the operating stability and service life of the fan. The temperature of the air outlet cannot be quickly reduced, which can easily affect the surrounding environment.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an explosion-proof fan with an impact-resistant self-temperature control mechanism, comprising a mounting base, an upper assembly plate is installed on the upper end of the mounting base through a shock-absorbing base, a casing with an impeller installed inside and a three-phase asynchronous motor located on one side of the casing are fixedly assembled on the upper end of the upper assembly plate, the three-phase asynchronous motor is connected to the control shaft outside the impeller through a pulley transmission mechanism at the output end, an external temperature control cover is mounted on the outer side wall of the air inlet of the casing, an external connector for an external high-pressure water pipe is fixedly assembled on the outer side surface of the external temperature control cover, and an explosion-proof component and a temperature control mechanism connected to the inside of the external temperature control cover are installed inside the casing.

[0005] The casing is fixedly equipped with a lateral transmission cover between the side wall opposite to the air inlet and the side wall of the output end of the three-phase asynchronous motor, and the pulley transmission mechanism is installed inside the lateral transmission cover.

[0006] An air inlet, an air outlet, a flow guide chamber and an explosion-proof chamber are arranged inside the casing.

[0007] The explosion-proof component is a built-in explosion-proof mesh frame mechanism, which is fixed inside the explosion-proof chamber by bolts.

[0008] An external explosion-proof mesh frame is fixedly mounted at the air outlet opening of the casing.

[0009] A lateral assembly groove for installing a temperature control mechanism is provided on the inner inclined surface of the guide chamber, and an opening is provided on a side of the lateral assembly groove corresponding to the explosion-proof component.

[0010] The temperature control mechanism comprises a metal connecting pipe fixed inside the lateral assembly groove and connected with the external temperature control cover shell, and a fire sprinkler fixed at the output end of the metal connecting pipe.

[0011] The impeller comprises a driving impeller with a control shaft on the outer side and a buffer impeller cover which is sleeved on the driving impeller through a spring.

[0012] A spring damper is arranged inside the damping base to improve the damping performance of the upper assembly plate.

[0013] The outer arc surface of the casing is provided with an inspection opening protruding outwards.

[0014] The beneficial effects of the present invention are:

[0015] (1) The explosion-proof fan with an anti-impact self-temperature control mechanism of the present invention can reduce the wind noise inside the input port when not in use and can also reduce the temperature of the input air by arranging an external temperature control cover connected to a high-pressure water pipe outside the input port;

[0016] (2) A temperature control mechanism is installed on the inner slope of the flow guide chamber, located inside the explosion-proof component. Once high-temperature or burning air is drawn into the input port, the heat-sensitive glass ball inside the nozzle of the fire sprinkler will melt, thereby automatically opening the fire sprinkler. The high-pressure water inside the external temperature-controlled housing will spray high-pressure water to the inside of the explosion-proof component through the fire sprinkler, thereby reducing the temperature of the drawn-in air, extinguishing the fire inside, and cooling the entire housing, greatly improving the safety and durability of the fan;

[0017] (3) The fan can quickly extract water vapor and smoke to the outside while extinguishing the fire and cooling it, thereby enhancing the internal temperature control effect;

[0018] (4) The temperature control mechanism is set on the inner wall of the casing and is embedded, which not only does not affect the operation of the fan, but also ensures that the temperature control mechanism is not affected during daily use, thereby improving durability;

[0019] (5) By elastically sleeved a buffer impeller cover on the outside of the driving impeller, the impact force can reduce the damage to the impeller while ensuring the daily use effect;

[0020] (6) The design of the elastically adjustable buffer impeller cover can expand the area of ​​the inspection port during maintenance, reducing the difficulty of later maintenance;

[0021] (7) The fire sprinkler adopts a detachable structure design, which can be quickly installed and separated from the metal connecting pipe, reducing the subsequent maintenance cost;

[0022] (8) A shock-absorbing base with a spring shock absorber installed between the mounting base and the upper assembly plate can effectively reduce the vibration transmission of the equipment;

[0023] (9) By lowering the air temperature at the input and output ports, its impact on the surrounding environment can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a rear view of the present invention.

[0027] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the assembly surface of the temperature control mechanism in the present invention. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Figure 1 , Figure 2 , Figure 3 and Figure 4An explosion-proof fan with an impact-resistant self-temperature control mechanism is shown, comprising a mounting base 1, an upper mounting plate 3 is mounted on the upper end of the mounting base 1 through a shock-absorbing base 2, a casing 5 with an impeller 4 mounted inside and a three-phase asynchronous motor 6 located on one side of the casing 5 are fixedly mounted on the upper end of the upper mounting plate 3, the three-phase asynchronous motor 6 is connected to the outer control shaft of the impeller 4 through a pulley transmission mechanism 7 at the output end, an external temperature control cover 8 is mounted on the outer wall of the air inlet of the casing 5, an external connector 10 for an external high-pressure water pipe 9 is fixedly mounted on the outer surface of the external temperature control cover 8, an explosion-proof component 11 and a temperature control mechanism 12 connected to the inside of the external temperature control cover 8 are installed inside the casing 5.

[0032] Working principle: When a fire is generated and the high-pressure air generated by the explosion is introduced into the casing 5 from the air inlet, the explosion-proof component 11 will buffer the high-pressure air, and the water inside the external temperature-controlled cover 8 will absorb heat from the high-temperature air at the air inlet. When the high-temperature air is introduced into the casing 5 through the explosion-proof component 11, the sealing plug inside the temperature-control mechanism 12 will be melted. At this time, the temperature-control mechanism 12 will quickly spray the liquid inside the external temperature-controlled cover 8 to the inside of the explosion-proof component 11, cooling the explosion-proof component 11 on the one hand, and cooling the internal high-temperature air, the casing 5 and the impeller 4 at the same time to prevent the temperature from being transferred outward. Then, a large amount of water vapor will be generated in the whole process, and the impeller will discharge the water vapor upward by high-speed rotation. The temperature and harmful substances in the original smoke can be reduced by high-pressure water cooling and water washing, thereby avoiding the impact on the surrounding environment and ensuring that the fan can operate stably and efficiently for a long time.

[0033] At the same time, the accumulated liquid inside the casing 5 can also be thrown outwards by the high-speed rotation of the impeller 4 in the later stage, and the temperature of the inner wall of the casing 5 can be uniformly reduced.

[0034] In order to improve the safety and stability of the lateral transmission, a lateral transmission cover 13 is fixedly installed between the side wall of the casing 5 opposite to the air inlet and the side wall of the output end of the three-phase asynchronous motor 6, and the pulley transmission mechanism 7 is installed inside the lateral transmission cover 13.

[0035] The pulley transmission mechanism 7 is composed of a first pulley axially sleeved on the output shaft of the three-phase asynchronous motor 6, a second pulley axially sleeved on the outer control shaft of the impeller 4, and a transmission belt. The three-phase asynchronous motor 6 drives the impeller 4 to rotate at high speed.

[0036] In order to facilitate internal air delivery, an air inlet 14 , an air outlet 15 , a flow guide chamber 16 and an explosion-proof chamber 17 are provided inside the casing 5 .

[0037] In order to slow down the flow of high-pressure air at the air inlet 14 , the explosion-proof component 11 is a built-in explosion-proof mesh frame mechanism, which is fixed inside the explosion-proof chamber 17 by bolts.

[0038] In order to provide secondary buffering for the impact force, an external explosion-proof mesh frame 18 is fixedly mounted at the opening position of the exhaust port of the housing 5 .

[0039] In order to cooperate with embedded installation without affecting the normal operation of the impeller 4, and at the same time the wind pressure introduced by the air inlet 14 will not affect the temperature control mechanism 12, a lateral assembly groove 19 for installing the temperature control mechanism 12 is opened on the inner inclined surface of the guide chamber 16, and the lateral assembly groove 19 is provided with an opening on the side corresponding to the explosion-proof component.

[0040] In order to cooperate with the inner assembly, the temperature control mechanism 12 includes a metal connecting pipe 121 fixed inside the lateral assembly groove 19 and connected to the external temperature control cover 8, and a fire sprinkler 122 fixed at the output end of the metal connecting pipe 121.

[0041] The metal connecting pipe 121 is axially fixedly connected to the fire sprinkler 122 through a threaded joint. The fire sprinkler 122 is composed of an internal threaded connector threadedly mounted on the threaded joint of the metal connecting pipe 121, a water pipe plug, a sprinkler and a liquid-filled thermosensitive glass ball. In general, the fire sprinkler is connected to the pressure-filled external temperature control housing 8 through the metal connecting pipe 121. When a fire occurs, the air introduced from the input port carries high temperature into the diversion chamber 16. After the glass ball in the sprinkler is subjected to high temperature, the liquid inside will begin to expand. When the set expansion temperature is exceeded, the liquid will squeeze the glass ball. At this time, the water in the metal connecting pipe 121 will spray out to extinguish the fire and cool down. The sprinkler is arranged in an arc shape above the explosion-proof component 11, and continuously sprays water at high pressure. In most cases, the fire source will be completely extinguished, or at least the heat will be controlled to limit the generation of toxic smoke. Then the large amount of water vapor generated inside is quickly discharged from the exhaust port 15 through the impeller 4.

[0042] In order to buffer the impact force of the inlet, the impeller 4 includes a driving impeller 41 with a control shaft on the outer side and a buffer impeller cover 43 mounted on the driving impeller 41 through a spring 42.

[0043] The high-pressure impact force generated at the air inlet 14 will first impact the explosion-proof component 11 for a buffer, and then impact the buffer impeller cover 43 for a second time. The spring 42 between the buffer impeller cover 43 and the driving impeller 41 is contracted to alleviate the impact force and reduce the impact on the driving impeller 41.

[0044] Under normal circumstances, the driving impeller 41 can drive the buffer impeller cover 43 to rotate synchronously at a high speed. If the buffer impeller cover 43 is deformed due to impact, it can be replaced to reduce the replacement cost.

[0045] In order to improve the shock absorption performance, a spring damper 20 is arranged inside the shock absorption base 2 to improve the shock absorption performance of the upper assembly plate 3 .

[0046] A telescopic groove with an upper opening is provided inside the shock-absorbing base 2, and the bottom of the spring damper 20 is fixed inside the telescopic groove. The upper end of the spring damper 20 is connected to the bottom of the upper assembly plate 3, so as to form a buffer between the mounting base 1 and the upper assembly plate 3, thereby reducing the vibration transmission of the entire fan.

[0047] In order to facilitate later maintenance, the outer arc surface of the housing 5 is provided with an outwardly protruding maintenance opening 21.

[0048] The interior of the casing 5 can be observed and maintained through the inspection opening 21 .

[0049] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An explosion-proof fan with an impact-resistant self-temperature control mechanism, comprising a mounting base (1), characterized in that: An upper mounting plate (3) is mounted on the upper end of the mounting base (1) via a shock-absorbing base (2); a casing (5) in which an impeller (4) is mounted and a three-phase asynchronous motor (6) located on one side of the casing (5) are fixedly mounted on the upper end of the upper mounting plate (3); the three-phase asynchronous motor (6) is connected to the outer control shaft of the impeller (4) via a pulley transmission mechanism (7) at the output end; an external temperature control cover (8) is mounted on the outer wall of the air inlet of the casing (5); an external connector (10) for connecting an external high-pressure water pipe (9) is fixedly mounted on the outer surface of the external temperature control cover (8); an explosion-proof component (11) and a temperature control mechanism (12) connected to the inside of the external temperature control cover (8) are installed inside the casing (5).

2. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: The casing (5) is fixedly equipped with a lateral transmission cover (13) between the side wall opposite to the air inlet and the side wall of the output end of the three-phase asynchronous motor (6), and the pulley transmission mechanism (7) is installed inside the lateral transmission cover (13).

3. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: An air inlet (14), an air outlet (15), a flow guide chamber (16) and an explosion-proof chamber (17) are arranged inside the casing (5).

4. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 3 is characterized in that: The explosion-proof component (11) is a built-in explosion-proof mesh frame mechanism, which is fixed inside the explosion-proof chamber (17) by bolts.

5. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: An external explosion-proof net frame (18) is fixedly mounted at the air outlet opening of the casing (5).

6. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 3 is characterized in that: A lateral mounting groove (19) for mounting the temperature control mechanism (12) is provided on the inner inclined surface of the flow guide chamber (16), and an opening is provided on one side of the lateral mounting groove (19) corresponding to the explosion-proof component (11).

7. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: The temperature control mechanism (12) comprises a metal connecting pipe (121) fixed inside the lateral assembly groove (19) and connected to the external temperature control housing (8), and a fire sprinkler (122) fixed at the output end of the metal connecting pipe (121).

8. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: The impeller (4) comprises a driving impeller (41) having a control shaft on the outside and a buffer impeller cover (43) sleeved on the driving impeller (41) via a spring (42).

9. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: A spring damper (20) for improving the damping performance of the upper assembly plate (3) is arranged inside the damping base (2).

10. The explosion-proof fan with an anti-shock self-temperature control mechanism according to claim 1 is characterized in that: The outer arc surface of the casing (5) is provided with an outwardly protruding inspection opening (21).

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