Noise reduction device for kiln tail induced draft fan

Abstract

The utility model belongs to the technical field of noise reduction devices, and discloses a noise reduction device for a kiln tail induced draft fan, which comprises a sound insulation cover for surrounding the kiln tail induced draft fan and a temperature sensor for monitoring the temperature change of the kiln tail induced draft fan, the sound-proof cover is provided with a first via hole through which an induced draft opening of the kiln tail induced draft fan passes and a second via hole through which an exhaust pipe of the kiln tail induced draft fan passes; the sound insulation cover is provided with an air inlet and an air outlet, and an exhaust fan is arranged at the air outlet; the sound insulation cover is provided with a porous layer, a middle layer and a sound absorption layer from inside to outside. According to the kiln tail induced draft fan, sound is effectively absorbed through the sound insulation cover, meanwhile, the air inlet, the air outlet, the temperature sensor and the exhaust fan are used for cooling the internal environment of the sound insulation cover, and therefore the motor of the kiln tail induced draft fan is within the working temperature range, and the situation that the kiln tail induced draft fan cannot work for a long time is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of noise reduction devices, and in particular relates to a noise reduction device for a kiln tail induced draft fan. Background Art

[0002] The kiln tail induced draft fan is a machine specially used for circulating and transmitting high-temperature gas. It is often used in the kiln tail exhaust system to discharge high-temperature exhaust gas and circulate cooling. The kiln tail induced draft fan is mainly composed of motor, impeller, casing, air inlet and outlet and other components. When the motor starts, the impeller will also rotate, generating a certain pressure, so that the gas circulates inside the machine, which plays the role of discharging high-temperature exhaust gas and circulating cooling.

[0003] Since the power of the induced draft fan at the end of the kiln is relatively large, the noise pollution generated during the induced draft is relatively serious, which makes the working environment further deteriorate and the hearing health of the workers is greatly damaged. Therefore, a noise reduction device for the induced draft fan at the end of the kiln is provided, which can effectively reduce the noise while avoiding the noise reduction device from interfering with the normal operation of the induced draft fan at the end of the kiln. Utility Model Content

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a noise reduction device for a kiln tail induced draft fan.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A noise reduction device for a kiln tail induced draft fan, comprising a soundproof cover for surrounding the kiln tail induced draft fan and a temperature sensor for monitoring temperature changes of the kiln tail induced draft fan;

[0007] The soundproof cover is provided with a first through hole for passing the air inlet of the kiln tail induced draft fan, and the soundproof cover is provided with a second through hole for passing the exhaust pipe of the kiln tail induced draft fan;

[0008] The soundproof cover is provided with an air inlet and an air outlet, and an exhaust fan is provided at the air outlet;

[0009] The soundproof cover is provided with a porous layer, an intermediate layer and a sound absorbing layer from the inside to the outside.

[0010] It is further defined that the sound insulation cover includes an upper cover body and a lower cover body, the upper cover body and the lower cover body are inserted into each other and locked after positioning, the kiln tail draft fan is located in the enclosed space formed by the upper cover body and the lower cover body, the upper cover body and the lower cover body are both provided with half holes, the half holes are combined to form a first through hole for passing the air vent, and the second through hole is located on the top surface of the upper cover body, such a structural design, during installation, it is necessary to place the kiln tail draft fan in the sound insulation cover, and it cannot interfere with the protrusion of the air vent and the exhaust duct, therefore, the structure of the sound insulation cover is designed as a combination of upper and lower separations, when the upper cover body and the lower cover body are combined, the two half holes are combined to form a first through hole for passing the air vent, and the first through hole for passing the air vent is arranged on the surface of the upper cover body, which can not only facilitate installation but also solve the problem of adapting to the appearance of the kiln tail draft fan.

[0011] It is further defined that the air inlet is located at the bottom of the side of the lower cover body, and the air outlet is located at the top surface of the upper cover body. With such a structural design, since the induced draft fan at the kiln tail draws out the hot air in the kiln, the ambient temperature of the inner cavity of the sound insulation cover is relatively high, and the gas moves upward. In order to speed up the gas discharge speed, the air inlet is arranged at the bottom and the air outlet is arranged at the top, so that it is convenient for the external gas to enter the inner cavity of the sound insulation cover and then quickly move upward and be discharged.

[0012] It is further defined that the circumferential surface of the exhaust fan is provided with an external thread, the inner wall of the air outlet is provided with an internal thread, and the exhaust fan is threadedly connected in the inner cavity of the air outlet. Such a structural design and the threaded connection method are convenient for disassembly and assembly.

[0013] Further limitation includes a controller for signal control. With such a structural design, the controller is used to realize the start and stop control and operation time of various components. The controller can be a single-chip microcomputer or a programmable logic controller.

[0014] The beneficial effects of the utility model are as follows: while the soundproof cover effectively absorbs sound, the air inlet, air outlet, temperature sensor and exhaust fan are used to cool the internal environment of the soundproof cover, so that the motor of the kiln tail draft fan is within the operating temperature range, avoiding the situation where the kiln tail draft fan cannot work for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a structural schematic diagram of an embodiment of a noise reduction device for a kiln tail induced draft fan of the utility model;

[0017] Figure 2 The utility model is a noise reduction device for a kiln tail induced draft fan. Figure 1 Sectional view of AA in the middle;

[0018] Figure 3 It is a structural schematic diagram of the upper cover body and the lower cover body in an embodiment of a noise reduction device for a kiln tail induced draft fan of the utility model;

[0019] Figure 4 It is a layered diagram of a soundproof cover in an embodiment of a noise reduction device for a kiln tail induced draft fan of the utility model;

[0020] The main component symbols are described as follows:

[0021] 1. Soundproof cover; 11. Upper cover body; 111. Air outlet; 112. Second through hole; 113. Half hole; 12. Lower cover body; 121. Air inlet; 13. Sound absorbing layer; 14. Middle layer; 15. Porous layer;

[0022] 2. Temperature sensor;

[0023] 3. Exhaust fan;

[0024] 4. Kiln tail induced draft fan; 41. Air induced outlet; 42. Exhaust duct. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-4 As shown, a noise reduction device for a kiln tail induced draft fan of the utility model comprises a soundproof cover 1 for surrounding the kiln tail induced draft fan 4 and a temperature sensor 2 for monitoring the temperature change of the kiln tail induced draft fan 4;

[0027] The soundproof cover 1 is provided with a first through hole for passing the air inlet 41 of the kiln tail induced draft fan 4, and the soundproof cover 1 is provided with a second through hole 112 for passing the exhaust pipe 42 of the kiln tail induced draft fan 4;

[0028] The soundproof cover 1 is provided with an air inlet 121 and an air outlet 111, and an exhaust fan 3 is provided at the air outlet 111;

[0029] The soundproof cover 1 is provided with a porous layer 15 , an intermediate layer 14 and a sound absorbing layer 13 from the inside to the outside.

[0030] In this embodiment:

[0031] The soundproof cover 1 surrounds the kiln tail induced draft fan 4, thereby absorbing and isolating the noise generated by the kiln tail induced draft fan 4, preventing the noise from further spreading into the working environment and causing a burden on the hearing health of the on-site workers. When the noise sound wave enters the inner porous layer 15, the sound wave enters the interior of the material along the micropores, causing the vibration of the air in the gap. Due to the viscous resistance of the air, the friction between the air and the pore wall, and the heat conduction effect, a considerable part of the sound energy is converted into heat energy and lost, thereby achieving the purpose of sound absorption. The middle layer 14 is used as a skeleton to provide an attachment position for the porous layer 15 and the sound-absorbing layer 13 on both sides. The sound-absorbing layer 13 reflects and scatters the sound waves multiple times through the fiber material inside the sound-absorbing cotton, thereby achieving sound absorption;

[0032] In order to prevent the soundproof cover 1 from causing the internal temperature to rise and the kiln tail draft fan 4 from being unable to work normally for a long time, the soundproof cover 1 is provided with an air inlet 121 and an air outlet 111, and an exhaust fan 3 is arranged at the air outlet 111. In addition, the internal environment is also provided with a temperature sensor 2 for monitoring the temperature change of the kiln tail draft fan 4. When the temperature sensor 2 detects that the temperature of the kiln tail draft fan 4 rises above the preset temperature, the air inlet 121 delivers low-temperature air, and the low-temperature air performs heat exchange in the internal environment of the soundproof cover 1 to reduce the internal temperature. The exhaust fan 3 is turned on to accelerate the process of low-temperature air entraining heat to escape, thereby keeping the motor of the kiln tail draft fan 4 within the working temperature range to prevent the kiln tail draft fan 4 from being unable to work for a long time.

[0033] Preferably, the soundproof cover 1 includes an upper cover body 11 and a lower cover body 12, which are inserted and positioned with each other and then locked, and the kiln tail draft fan 4 is located in the enclosed space formed by the upper cover body 11 and the lower cover body 12, and the upper cover body 11 and the lower cover body 12 are both provided with a half hole 113, and the half hole 113 is combined to form a first through hole for passing the air inlet 41, and the second through hole 112 is located on the top surface of the upper cover body 11. Such a structural design requires the kiln tail to be installed. The tail exhaust fan 4 is placed in the soundproof cover 1, and it cannot interfere with the extension of the exhaust port 41 and the exhaust pipe 42. Therefore, the structure of the soundproof cover 1 is designed to be separated from the upper and lower parts. When the upper cover body 11 and the lower cover body 12 are combined, the two half holes 113 are combined to form a first through hole for passing the exhaust port 41. The first through hole for passing the exhaust port 41 is arranged on the surface of the upper cover body 11, which is convenient for installation and solves the problem of matching the appearance of the kiln tail exhaust fan 4. In fact, other structural shapes of the soundproof cover 1 can also be considered according to specific circumstances.

[0034] Preferably, the air inlet 121 is located at the bottom of the side of the lower cover body 12, and the air outlet 111 is located at the top surface of the upper cover body 11. With this structural design, since the kiln tail induced draft fan 4 draws out the hot air in the kiln, the ambient temperature of the inner cavity of the soundproof cover 1 is relatively high, and the gas moves upward. In order to speed up the speed of gas discharge, the air inlet 121 is arranged at the bottom, and the air outlet 111 is arranged at the top, so that the external gas enters the inner cavity of the soundproof cover 1 and quickly moves upward and is discharged. In fact, other structural shapes for rapid circulation can also be considered according to specific circumstances.

[0035] Preferably, the circumferential surface of the exhaust fan 3 is provided with an external thread, the inner wall of the air outlet 111 is provided with an internal thread, and the exhaust fan 3 is threadedly connected in the inner cavity of the air outlet 111. Such a structural design and the threaded connection are convenient for disassembly and assembly. In fact, other connection structures can also be considered according to specific circumstances.

[0036] Preferably, a controller for signal control is also included. With such a structural design, the controller is used to realize the start and stop control of various components and the operation time. The controller can be a single chip microcomputer or a programmable logic controller. In fact, other control structures can also be considered according to specific circumstances.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A noise reduction device for a kiln tail induced draft fan, characterized in that: It comprises a soundproof cover (1) for surrounding a kiln tail induced draft fan (4) and a temperature sensor (2) for monitoring temperature changes of the kiln tail induced draft fan (4); The soundproof cover (1) is provided with a first through hole for passing the air inlet (41) of the kiln tail induced draft fan (4), and the soundproof cover (1) is provided with a second through hole (112) for passing the air exhaust pipe (42) of the kiln tail induced draft fan (4); The soundproof cover (1) is provided with an air inlet (121) and an air outlet (111), and an exhaust fan (3) is provided at the air outlet (111); The soundproof cover (1) is provided with a porous layer (15), an intermediate layer (14) and a sound absorbing layer (13) from the inside to the outside.

2. A noise reduction device for a kiln tail induced draft fan according to claim 1, characterized in that: The soundproof cover (1) comprises an upper cover body (11) and a lower cover body (12), wherein the upper cover body (11) and the lower cover body (12) are inserted into each other and locked after being positioned, and the kiln tail draft fan (4) is located in an enclosed space formed by the upper cover body (11) and the lower cover body (12), and the upper cover body (11) and the lower cover body (12) are both provided with a half hole (113), and the half hole (113) is combined to form a first through hole for passing the air duct (41), and the second through hole (112) is located on the top surface of the upper cover body (11).

3. A noise reduction device for a kiln tail induced draft fan according to claim 2, characterized in that: The air inlet (121) is located at the bottom of the side surface of the lower cover body (12), and the air outlet (111) is located at the top surface of the upper cover body (11).

4. The noise reduction device for the kiln tail induced draft fan according to claim 1, characterized in that: The circumferential surface of the exhaust fan (3) is provided with an external thread, the inner wall of the air outlet (111) is provided with an internal thread, and the exhaust fan (3) is threadedly connected in the inner cavity of the air outlet (111).

5. A noise reduction device for a kiln tail induced draft fan according to any one of claims 1 to 4, characterized in that: A controller for signal control is also included.

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