CN202048808U - Exhaust silencer for cooling tower - Google Patents

Abstract

The utility model discloses an exhaust muffler used for cooling towers. The muffler includes a cylindrical muffler shell and a muffler body inside; the muffler body includes a central muffler sheet coaxial with the muffler shell and radial radiation between the central muffler sheet and the muffler shell The mufflers arranged at equal intervals; the central muffler is conical, and the cone is vertically downward; the muffler shell is provided with an air guide tube. Through the utility model, the exhaust noise of the cooling tower can be effectively controlled, and the ventilation effect of the exhaust port is ensured. The frequency range of the noise reduction is wide. At the same time, it has the advantages of beautiful appearance, low cost, and convenient disassembly and assembly. environmental and social benefits.

Description

A kind of exhaust muffler for cooling tower

technical field

The utility model belongs to the technical field of noise control and management, in particular to an exhaust muffler for cooling towers.

Background technique

The function of the cooling tower in the circulating water system is to cool the hot water taken out of the device for recirculation. According to their different uses, they can be divided into natural ventilation cooling towers, fan-assisted ventilation cooling towers, mechanical ventilation cooling towers, wet/dry cooling towers, and spray cooling towers. The noise sources of general cooling towers mainly include fan noise, mechanical noise, motor noise, water spray noise, water pump noise, etc. In addition to taking measures directly against the noise source, it is a practical and effective method to set up a sound barrier and add a muffler on its propagation path to control the noise from radiating outward. The exhaust outlet of the cooling tower is generally located above the tower body. Since it is placed in the open air and has a lot of water drift, when designing the exhaust muffler, in addition to considering the noise reduction and ventilation effects, the waterproof performance should also be guaranteed. At present, the exhaust mufflers used in cooling towers mostly use resistive mufflers, and the common forms include straight circles, concentric circles, and grids. The straight circular muffler and the concentric circular muffler have a better ventilation effect, but the sound attenuation effect is not good. The ventilation area of the cell muffler can be adjusted by adjusting the cell pattern, but there are problems such as narrow frequency domain of muffler.

Chinese Patent No. 00221254.4, "Cooling Tower Air Outlet Muffler" discloses a cooling tower air outlet muffler, which has a muffler shell, and the inner wall of the muffler shell is pasted with a peripheral cylindrical sound absorbing body assembled by a keel frame. In the center of the shell, there is a central cylindrical sound-absorbing body attached to the keel frame, and more than 3 radially radiating Class A sheet-type sound-absorbing bodies are arranged between the central cylindrical sound-absorbing body and the peripheral cylindrical sound-absorbing body. The sound body and more than 3 Class B sheet-type sound-absorbing bodies with radial radiation, the Class-A sheet-type sound-absorbing body and the Class-B sheet-type sound-absorbing body are alternately and evenly spaced, and the keel frames at both ends are respectively fixed on the The center cylindrical sound-absorbing body dragon skeleton and the peripheral cylindrical sound-absorbing body dragon skeleton. Although it has the advantages of large amount of noise reduction for cooling tower fan noise, small wind resistance, large noise reduction coefficient of the sound absorbing body, high temperature resistance and no fear of humidity, there is still the problem of narrow frequency range of noise reduction.

Utility model content

The utility model provides an exhaust muffler for a cooling tower, which has a wide range of muffler frequencies.

An exhaust muffler for a cooling tower, comprising a cylindrical muffler shell and a muffler body arranged in the muffler shell; The radial radiation between the sound plate and the muffler shell is arranged at equal intervals; the central sound-absorbing plate is conical, and the cone is vertically downward. Since the conical sound-absorbing sheet gradually becomes larger from bottom to top, the cross-section of the sound-absorbing channel also gradually changes, thus widening the frequency range of the sound-absorbing.

A circular steel plate is arranged above the central conical sound-absorbing sheet, which prevents rainwater from directly falling into the interior of the conical sound-absorbing sheet, and has good waterproof performance.

An air guide tube is provided under the muffler shell, and the air guide tube is made of steel plate, and the two ends of the air guide tube are respectively connected with the edge of the muffler shell and the edge of the exhaust port above the cooling tower. After the air duct is added, the section of the ventilation duct is gradually changed, thereby reducing the airflow pressure loss.

Preferably, the air guide tube is detachable, which is convenient for disassembly and maintenance.

More preferably, the air guide tube and the muffler shell are connected by a flange, and the air guide tube and the cooling tower are connected by a flange.

The muffler shell and muffler body are detachable, which is convenient for disassembly and maintenance.

The muffler casing, muffler body and air guide tube are vertically hoistable and easy to install.

Preferably, the inner wall of the pipe of the muffler shell is provided with a micro-perforated plate, which has good moisture resistance.

Both the central conical sound-absorbing sheet and the inside of the sound-absorbing sheet are equipped with micro-perforated plates, which have good moisture resistance.

The utility model has a wide range of sound-absorbing frequencies, is convenient to disassemble and assemble, and has good waterproof and moisture-resistant performances. The utility model can effectively control the exhaust noise of the cooling tower and ensure the ventilation effect of the exhaust port. At the same time, the utility model has a cylindrical muffler shell and a conical central muffler sheet, which is beautiful in appearance, low in cost, and has good environmental and social benefits.

Description of drawings

Fig. 1 is the structural representation of exhaust muffler of the present utility model;

Fig. 2 is a top view of the exhaust muffler shown in Fig. 1;

Fig. 3 is a bottom view of the exhaust muffler shown in Fig. 1;

Fig. 4 is a side sectional view of the exhaust muffler shown in Fig. 1;

Fig. 5 is a schematic diagram of the structure of the exhaust muffler of the present invention connected to the cooling tower.

Detailed ways

In order to describe the utility model more specifically, the technical solutions of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of the exhaust muffler of the present invention, which is an exhaust muffler for cooling towers, including a cylindrical muffler shell 1 , a muffler body 2 and an air guide tube 3 . An air guide tube 3 is provided below the muffler shell 1 , and the top of the air guide tube 3 is connected to the lower edge of the muffler shell 1 through a flange 11 . As shown in FIG. 5 , the bottom of the air guide tube 3 is connected to the edge of the exhaust port 41 above the cooling tower 4 through a flange 31 . After the air duct 3 is added, the cross-section of the ventilation duct is gradually changed, thereby reducing the airflow pressure loss. And through the flange connection, disassembly and maintenance are more convenient.

The muffler body 2 is arranged inside the muffler shell 1, and it includes a central muffler sheet 21 coaxial with the muffler shell 1 and radially radiating mufflers arranged at equal intervals between the central muffler sheet 21 and the muffler shell 1. Sound sheet 22, central sound-absorbing sheet 21 are conical, and the cone is vertically downward, as shown in Figures 2 and 3. Fig. 2 is a top view of the muffler shown in Fig. 1, and Fig. 3 is a bottom view of the muffler shown in Fig. 1 . Since the central conical sound-absorbing sheet 21 gradually becomes larger from bottom to top, the cross-section of the sound-absorbing channel is also gradually changed, thereby widening the frequency range of the sound-absorbing.

The inner wall of the metal pipe of the muffler shell 1 is provided with a micro-perforated plate as the sound-absorbing material, and the central sound-absorbing sheet 21 and the sound-absorbing sheet 22 are internally provided with a micro-perforated plate as the sound-absorbing material, so they have good moisture resistance. Moreover, the number and arrangement of the sound-absorbing plates 22 can be adjusted according to the characteristics of the sound source and noise reduction requirements, which is more convenient and effective in practical engineering applications.

As shown in Figure 4, the central conical sound-absorbing sheet 21 cones are vertically downward, and a circular steel plate 23 is installed above the bottom surface (vertically upward), and this steel plate 23 prevents rainwater from directly falling into the center conical-shaped sound-absorbing sheet 21 inside, so The muffler has better waterproof performance.

In addition, the muffler shell 1, the muffler body 2 and the air guide tube 3 are detachable and vertically hoisted, so it is convenient to disassemble and maintain. Sheet 22 for adjustment.

Claims (8)

1. exhaust silencer that is used for cooling tower, comprise columniform muffler shell (1) and be located at its interior muffler body (2), described muffler body (2) comprise with the coaxial center anechoic sheet (21) of muffler shell (1) and be located at center anechoic sheet (21) and muffler shell (1) between radial radiation be the anechoic sheet (22) of equidistantly arranging, it is characterized in that: described center anechoic sheet (21) is for conical, and circular cone vertically downward.

2. exhaust silencer according to claim 1 is characterized in that: described muffler shell (1) below is provided with ventilating duct (3).

3. exhaust silencer according to claim 2 is characterized in that: described ventilating duct (3) two ends are connected with exhaust outlet (41) edge, cooling tower (4) top with muffler shell (1) edge respectively.

4. exhaust silencer according to claim 3 is characterized in that: described ventilating duct (3) is for detachable.

5. exhaust silencer according to claim 4 is characterized in that: adopt flange to be connected between described ventilating duct (3) and the muffler shell (1), the employing flange is connected between described ventilating duct (3) and the cooling tower (4).

6. exhaust silencer according to claim 1 is characterized in that: described center circle taper anechoic sheet (21) top is provided with circular steel plate (23).

7. exhaust silencer according to claim 1 is characterized in that: the inner-walls of duct of described muffler shell (1) is provided with microperforated panel.

8. exhaust silencer according to claim 1 is characterized in that: described center circle taper anechoic sheet (21) and anechoic sheet (22) inside are equipped with microperforated panel.

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