Smoke exhaust fan structure for high-temperature environment

Abstract

The utility model relates to the technical field of smoke exhaust equipment, in particular to a smoke exhaust fan structure for a high-temperature environment, which comprises a mounting frame, a motor and a smoke exhaust channel are fixedly mounted above the mounting frame, and a transmission shaft is rotatably connected to the surface of the smoke exhaust channel in a penetrating manner. A fan impeller is fixedly connected to the end, located in the smoke suction channel, of the transmission shaft, and a heat dissipation part is arranged between the end, extending out of the smoke suction channel, of the transmission shaft and an output shaft of the motor. The heat dissipation component comprises a hollow tubular shaft, one end of the tubular shaft is connected with an output shaft of the motor, and the other end of the tubular shaft is connected with the transmission shaft. The heat dissipation component is arranged between the transmission shaft and the output shaft of the motor, so that the motor is effectively protected from being influenced by high temperature, the service life of the motor is prolonged, the reliability and the stability of the smoke exhaust fan in a high-temperature environment are improved, and shutdown maintenance and economic loss caused by damage of the motor are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a smoke exhaust fan structure for high temperature environment belongs to the technical field of smoke exhaust equipment. BACKGROUND

[0002] In the industrial production field, such as metallurgy, chemical industry, food processing and so on, and the commercial kitchen, family cooking scene in daily life, the equipment such as cooking range, stove and so on in the operation process, fuel combustion can produce a large amount of high-temperature flue gas, these high-temperature flue gas if can not be discharged in time, not only can hinder the normal operation of equipment, also can cause carbon monoxide poisoning, fire and other serious safety hazards, therefore, smoke exhaust fan becomes the key equipment to guarantee the safe operation of equipment and environmental safety, along with the continuous expansion of industrial production scale and the increasing demand of life, the performance requirement of smoke exhaust fan is also higher and higher.

[0003] However, the existing smoke exhaust fan generally has the problem of short transmission shaft length connected with the motor and the impeller when coping with high-temperature environment. In the equipment operation process, the fan impeller is located in the smoke extraction channel of high-temperature flue gas flow, and the high-temperature gas continuously flows, so that the temperature of the impeller rises sharply and the heat is conducted to the motor through the transmission shaft. Because the transmission shaft is short, the high temperature is quickly conducted from the transmission shaft to the motor, causing the temperature of the motor to rise continuously. When the temperature of the motor exceeds its normal working tolerance range, the motor is easily damaged, which not only causes the shutdown of the equipment for maintenance, affects the normal production or life, but also causes direct economic losses, including the replacement cost of the motor, maintenance cost and the loss of production efficiency during shutdown.

[0004] In view of the above problems, the prior art needs to be improved. INVENTION CONTENTS

[0005] The utility model discloses a smoke exhaust fan structure for high temperature environment is provided to solve the problem that the motor of the existing smoke exhaust fan is easy to be damaged under high temperature environment.

[0006] In order to achieve the above object, the utility model employs the technical scheme of a smoke exhaust fan structure for high temperature environment, including mounting frame, the top of the mounting frame is fixedly installed with motor and smoke extraction channel, the surface of the smoke extraction channel is penetrated and is connected with transmission shaft, and one end of the transmission shaft in the inside of the smoke extraction channel is fixedly connected with fan impeller, and the other end of the transmission shaft extending to the outside of the smoke extraction channel is provided with heat dissipation component between the output shaft of the motor.

[0007] The heat dissipation component includes:

[0008] Pipe shaft, the pipe shaft is hollow, one end of the pipe shaft is connected with the output shaft of the motor, the other end of the pipe shaft is connected with the transmission shaft, and a plurality of long holes are formed in the outer side circumferential wall of the pipe shaft.

[0009] A flow guide cover is fixedly arranged on the mounting frame and covers the outside of the hollow tube shaft;

[0010] A flow guide vane is fixedly arranged on the outside circumferential wall of the hollow tube shaft;

[0011] A conical block is fixedly arranged inside the hollow tube shaft.

[0012] Further, the hollow tube shaft is coaxially arranged with the transmission shaft.

[0013] Further, the long strip hole extends along the axial direction of the hollow tube shaft and is arranged in a circumferential array on the outside of the hollow tube shaft.

[0014] Further, the flow guide cover comprises a horn portion and a straight tube portion connected with the horn portion, and the horn portion is located at one end close to the motor.

[0015] Further, the flow guide vane is arranged on the outside circumferential wall of the hollow tube shaft at a section inside the straight tube portion.

[0016] Further, the flow guide vanes are arranged in a circumferential array along the axial direction of the hollow tube shaft.

[0017] Further, the conical block is arranged inside the hollow tube shaft at an end away from the motor.

[0018] Further, the tip of the conical block is arranged towards the motor.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model discloses a heat dissipation component is arranged between the transmission shaft and the motor output shaft, and the heat dissipation component comprises a hollow tube shaft, a flow guide cover, a flow guide vane and a conical block. Air flow is generated by the rotation of the flow guide vane, and the external cold air is guided to enter through the flow guide cover. The cold air enters the inside of the hollow tube shaft through the long strip hole on the outside of the hollow tube shaft, and is fully exchanged with the inner wall of the hollow tube shaft to absorb the heat conducted by the hollow tube shaft. The hot air after heat exchange is guided to the outside through the long strip hole under the guidance of the conical block. This forced convection heat dissipation mode can significantly reduce the temperature of the hollow tube shaft. Since the hollow tube shaft is connected between the high-temperature transmission shaft and the motor sensitive to temperature, as an important link in the heat conduction path, the reduction of the temperature of the hollow tube shaft can greatly block or slow down the conduction of high temperature from the transmission shaft to the motor, thereby effectively protecting the motor from high temperature, prolonging the service life of the motor, improving the reliability and stability of the exhaust fan in the high-temperature environment, and reducing the downtime maintenance and economic losses caused by the damage of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a whole structure schematic view of the utility model.

[0022] Fig. 2 It is the overall sectional view of the utility model.

[0023] Fig. 3 It is the structure schematic view of the pipe shaft of the utility model.

[0024] Fig. 4 It is the sectional view of the pipe shaft of the utility model.

[0025] In the figure: 1, mounting frame;2, motor;3, transmission shaft;4, fan impeller;5, smoke extraction channel;6, heat dissipation component;601, pipe shaft;602, flow guide cover;6021, horn part;6022, straight pipe part;603, flow guide fan blade;604, conical block;605, long hole. DETAILED DESCRIPTION

[0026] The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be thought of by those skilled in the art.

[0027] In industrial production and daily life, the emission of high-temperature flue gas is a problem that must be faced in the operation of many devices. Although the traditional smoke exhaust fan can realize flue gas emission, when dealing with high-temperature flue gas, the transmission path between the motor and the fan impeller is short, and high temperature is easily conducted to the motor through the transmission shaft, which causes the motor to overheat or even be damaged, affecting the stable operation and service life of the device. In order to solve this technical problem, the utility model provides a smoke exhaust fan structure for high-temperature environment, which effectively blocks the conduction of heat to the motor by setting a component with special heat dissipation function between the transmission shaft and the motor, thereby protecting the motor.

[0028] As shown in Figs. 1 to 4 A smoke exhaust fan structure for high-temperature environment, comprising a mounting frame 1, a motor 2 and a smoke extraction channel 5 are fixedly installed above the mounting frame 1, a transmission shaft 3 is rotatably connected through the surface of the smoke extraction channel 5, a fan impeller 4 is fixedly connected to one end of the transmission shaft 3 inside the smoke extraction channel 5, and a heat dissipation component 6 is arranged between the other end of the transmission shaft 3 extending to the outside of the smoke extraction channel 5 and the output shaft of the motor 2.

[0029] The heat dissipation component 6 comprises:

[0030] A pipe shaft 601, the pipe shaft 601 is hollow, one end of the pipe shaft 601 is connected with the output shaft of the motor 2, the other end of the pipe shaft 601 is connected with the transmission shaft 3, and a plurality of long holes 605 are formed in the outer side wall of the pipe shaft 601;

[0031] A flow guide cover 602 is fixedly arranged on the mounting frame 1 and covers the outer side of the pipe shaft 601;

[0032] A flow guide vane 603 is fixedly arranged on the outer side circumferential wall of the pipe shaft 601;

[0033] A conical block 604 is fixedly arranged in the interior of the pipe shaft 601.

[0034] Unlike the prior art in which the transmission shaft is directly connected to the motor output shaft, the utility model adds a pipe shaft 601 with a heat dissipation function between the transmission shaft 3 and the motor 2. The pipe shaft 601 is a hollow structure, and the outer wall is provided with a long hole 605. In cooperation with the external flow guide cover 602 and the flow guide vane 603 and the internal conical block 604, an efficient air heat dissipation channel is formed. When the fan is running, the motor 2 drives the pipe shaft 601 and the transmission shaft 3 to rotate, and the flow guide vane 603 rotates to guide the external cold air to the outer side of the pipe shaft 601 through the flow guide cover 602. Part of the cold air enters the hollow interior of the pipe shaft 601 through the long hole 605 and exchanges heat with the inner wall of the pipe shaft 601 to absorb the heat conducted from the transmission shaft 3. The hot air after heat exchange flows in the pipe shaft 601 and is guided by the conical block 604 to be discharged to the outside through the long hole 605. This process forms a continuous air convection, effectively taking away the heat of the pipe shaft 601 and reducing its temperature. Since the pipe shaft 601 is connected between the transmission shaft 3 and the motor 2, the reduction of its temperature can significantly reduce the conduction of high temperature to the motor 2, thereby protecting the motor 2 from high temperature damage.

[0035] Specifically, during the smoke exhaust process, the mounting frame 1 supports the entire structure, and the two ends of the smoke extraction channel 5 are correspondingly mounted on the smoke exhaust duct. The motor 2 is started, and its output shaft drives the pipe shaft 601 to rotate, which in turn drives the transmission shaft 3 to rotate. The transmission shaft 3 drives the fan impeller 4 fixed thereon to rotate at high speed in the smoke extraction channel 5, thereby exhausting the high-temperature smoke gas entering the smoke extraction channel 5. At the same time, since the temperature of the smoke gas in the smoke extraction channel 5 is very high, heat will be conducted to the pipe shaft 601 through the transmission shaft 3. In order to reduce the temperature of the pipe shaft 601, the flow guide vane 603 rotates with the pipe shaft 601 and guides the external cold air into the pipe shaft 601 under the guidance of the flow guide cover 602. The cold air enters the hollow interior of the pipe shaft 601 through the long hole 605 on the outer side of the pipe shaft 601 and exchanges heat with the inner wall of the pipe shaft 601. The hot air after heat exchange flows in the pipe shaft 601 and is guided by the conical block 604 arranged in the interior of the pipe shaft 601 to be discharged through the long hole 605. This forced air convection heat dissipation process continues, effectively reducing the temperature of the pipe shaft 601, thereby significantly reducing the conduction of heat to the motor 2, protecting the motor 2 and improving the reliability and service life of the smoke exhaust fan in a high-temperature environment.

[0036] As an embodiment of the present application, the pipe shaft 601 is coaxially arranged with the transmission shaft 3.

[0037] As an embodiment of the present application, the long hole 605 extends along the axial direction of the pipe shaft 601 and is arranged in a circumferential array along the outer side of the pipe shaft 601.

[0038] Specifically, the long hole 605 is an elongated slot hole, and the length direction of the long hole 605 is parallel to the central axis of the pipe shaft 601. Meanwhile, the long hole 605 is arranged in a uniform or non-uniform circumferential array along the outer side of the pipe shaft 601. For example, a plurality of identical long holes 605 can be arranged at intervals on the circumference of the pipe shaft 601.

[0039] The long hole 605 is designed to extend along the axial direction and arranged in a circumferential array, which has significant technical advantages compared to other shapes or arrangements of holes. The long shape extending along the axial direction increases the air inlet and outlet area of a single hole, and due to its elongated characteristics, it can be arranged along a relatively long area of the pipe shaft 601, thereby increasing the effective length of heat exchange between air and the inner wall of the pipe shaft 601. The circumferential array arrangement ensures that air can enter and exit from all directions of the pipe shaft 601, increasing the total air inlet and outlet area and the uniformity of air exchange.

[0040] As an embodiment of the present application, the flow guide cover 602 comprises a horn portion 6021 and a straight pipe portion 6022 connected to the horn portion 6021, and the horn portion 6021 is located at one end close to the motor 2.

[0041] The design of the horn portion 6021 can more effectively capture and collect the surrounding external cold air due to its large opening area. When the flow guide fan blade 603 rotates, a large amount of external cold air is sucked into the flow guide cover 602 under the negative pressure formed by the horn portion 6021. Subsequently, the sucked cold air is guided into the straight pipe portion 6022 connected to the horn portion 6021. The straight pipe portion 6022 is arranged outside the area of the pipe shaft 601 with the long hole 605, which can concentrate and guide the airflow to the outer wall of the pipe shaft 601, especially the area where the long hole 605 is located.

[0042] Therefore, by designing the flow guide cover 602 to have a structure comprising a horn portion 6021 and a straight pipe portion 6022, and arranging the horn portion 6021 at one end close to the motor 2, the present application can significantly improve the introduction efficiency and flow guide effect of external cold air. Compared with the scheme without a flow guide cover or using a simple straight pipe-shaped flow guide cover, this structure can more effectively deliver cold air to the area of the pipe shaft 601 that needs to be cooled, providing sufficient cold source for the heat dissipation of the pipe shaft 601, further enhancing the heat dissipation capacity of the heat dissipation component 6, thereby better protecting the motor 2.

[0043] As an embodiment of the utility model, the guide fan blade 603 is arranged on the outer side wall of the pipe shaft 601 in the straight pipe part 6022.

[0044] As an embodiment of the utility model, the guide fan blade 603 is arranged along the axial circumference of the pipe shaft 601.

[0045] When working, the guide fan blade 603 is a key component for actively guiding and forcing air flow. By arranging it in the straight pipe part 6022, when the pipe shaft 601 rotates, the guide fan blade 603 rotates at high speed, generating an inward pushing force or suction force on the cold air entering the straight pipe part 6022. This action can effectively force the cold air introduced through the horn part 6021 into the straight pipe part 6022, and further into the inside of the pipe shaft 601 through the long hole 605 on the outer wall of the pipe shaft 601.

[0046] As an embodiment of the utility model, the tapered block 604 is arranged inside the end of the pipe shaft 601 away from the motor 2.

[0047] As an embodiment of the utility model, the tapered tip of the tapered block 604 is arranged towards the motor 2.

[0048] When working, the tapered block 604 is a component with a tapered structure, and its main function is to guide the airflow in the pipe shaft 601. By arranging it inside the end of the pipe shaft 601 away from the motor 2, this position is exactly the area where the cold air completes heat exchange in the pipe shaft 601 and is ready to be discharged. The tapered surface of the tapered block 604 can effectively guide the airflow flowing along the axial direction of the pipe shaft 601 to the outside, making it easier to be discharged to the outside through the long hole 605 on the outer wall of the pipe shaft 601. This guiding action helps to reduce the blockage of airflow at the end of the pipe shaft 601, and promotes smooth flow and renewal of internal air.

[0049] The utility model works as follows:

[0050] The mounting frame 1 is used to support the whole structure. When discharging smoke, the two ends of the smoke extraction channel 5 installed on the top of the mounting frame 1 are installed on the smoke exhaust pipe correspondingly. The motor 2 installed on the top of the mounting frame 1 is started. The output shaft of the motor 2 drives the pipe shaft 601 in the heat dissipation component 6 to rotate. The pipe shaft 601 is coaxially arranged with the transmission shaft 3. The pipe shaft 601 drives the transmission shaft 3 to rotate synchronously. The pipe shaft 601 drives the fan impeller 4 fixedly arranged on the surface of the transmission shaft 3 to rotate. The rotation of the fan impeller 4 accelerates the flow of smoke in the smoke extraction channel 5, so as to discharge the smoke entering the smoke extraction channel 5.

[0051] Since the flue gas in the smoking channel 5 is high-temperature flue gas, a large amount of heat is carried to the transmission shaft 3, and then is transmitted to the motor 2 through the transmission shaft 3 and the pipe shaft 601. In order to reduce the influence of high temperature on the motor 2, the inside of the pipe shaft 601 is hollow, and a plurality of long holes 605 are arranged on the outer side of the pipe shaft 601 in a circular periphery, so that the external cold air can enter the inside of the pipe shaft 601 through the long holes 605 to exchange heat, improve the heat dissipation effect of the pipe shaft 601, and drive the guide fan blades 603 on the surface of the pipe shaft 601 to rotate synchronously in the process of rotating the pipe shaft 601. The guide fan blades 603 rotate to introduce the external cold air into the end of the horn part 6021 of the guide cover 602 fixed above the mounting frame 1. Since the horn part 6021 is designed in a horn shape, part of the cold air flows from the inside of the horn part 6021 to contact the outer wall of the pipe shaft 601 to heat, and another part of the cold air is pressed into the straight pipe part 6022. The air pressed can better enter the inside of the pipe shaft 601 through the long holes 605 to exchange heat with the inner wall of the pipe shaft 601, so as to improve the contact area of the pipe shaft 601 and the cold air. After the cold air exchanges heat with the pipe shaft 601, it is guided by the conical block 604 and discharged to the outside through the long holes 605. The setting of the conical block 604 guides the airflow to be diffused, so that the air in the pipe shaft 601 is better discharged.

[0052] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A smoke exhaust fan structure for high temperature environment, comprising a mounting frame (1), a motor (2) and a smoke extraction channel (5) are fixedly installed above the mounting frame (1), characterized in that, The surface of the smoking channel (5) is provided with a transmission shaft (3) penetratingly connected, one end of the transmission shaft (3) fixedly connected with a fan wheel (4) inside the smoking channel (5), and a heat dissipation component (6) is arranged between the other end of the transmission shaft (3) extending to the outside of the smoking channel (5) and the output shaft of the motor (2). The heat dissipation component (6) comprises: A pipe shaft (601) is provided with a hollow, one end of the pipe shaft (601) is connected with the output shaft of the motor (2), the other end of the pipe shaft (601) is connected with the transmission shaft (3), and a plurality of long holes (605) are formed on the outer side wall of the pipe shaft (601); A flow guide cover (602) is fixedly arranged on the mounting frame (1), and the flow guide cover (602) is sleeved on the outer side of the pipe shaft (601); A flow guide fan blade (603) is fixedly arranged on the outer side wall of the pipe shaft (601); A conical block (604) is fixedly arranged inside the pipe shaft (601).

2. The exhaust fan structure for high temperature environment according to claim 1, wherein The pipe shaft (601) and the transmission shaft (3) are coaxially arranged.

3. The structure of the exhaust fan for high temperature environment according to claim 1, wherein The long holes (605) extend along the axial direction of the pipe shaft (601) and are arranged in a circumferential array along the outer side of the pipe shaft (601).

4. The structure of the exhaust fan for high temperature environment according to claim 1, wherein The flow guide cover (602) comprises a horn portion (6021) and a straight pipe portion (6022) connected with the horn portion (6021), and the horn portion (6021) is located at one end close to the motor (2).

5. The exhaust fan structure for high temperature environment according to claim 4, wherein The flow guide fan blade (603) is arranged on the outer side wall of the pipe shaft (601) located in the straight pipe portion (6022).

6. The structure of the exhaust fan for high temperature environment according to claim 5, wherein The flow guide fan blade (603) is arranged in a circumferential array along the axial direction of the pipe shaft (601).

7. The structure of the exhaust fan for high temperature environment according to claim 1, wherein The conical block (604) is arranged inside the pipe shaft (601) away from the motor (2).

8. The structure of the exhaust fan for high temperature environment according to claim 7, wherein The tip of the conical block (604) is arranged towards the motor (2).

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