CN205403535U - A combination formula piece formula noise eliminator for machine power cooling tower - Google Patents

Abstract

The utility model discloses a combined sheet type noise reduction device for mechanical cooling towers, which comprises: a main noise reduction device and a sub-type noise reduction device. The main muffler device is provided with a first muffler vane group, the first muffler vane set includes a plurality of first muffler vanes, the first muffler vanes are arranged parallel to each other, and the adjacent first muffler vanes Constitute the muffler air inlet channel, the sub muffler device is provided with a strip plate and a second muffler vane group, the second muffler vane set includes a plurality of second muffler vanes, the second muffler vanes are arranged in parallel with each other, The first end of the second silencing blade is inserted into the strip plate, the second end is exposed, and the distance between adjacent first silencing blades is equal to the distance between adjacent second silencing blades. The utility model can achieve the purpose of ventilation and noise reduction effect by adjusting the sub-noise reduction device.

Description

A combined chip muffler for mechanical cooling towers

technical field

The utility model relates to the field of mechanical manufacturing, in particular to a combined sheet type noise reduction device for mechanical cooling towers.

Background technique

Mechanical cooling towers are common supporting equipment for industrial enterprises and buildings. For a long time, their noise impact has attracted much attention. Especially in recent years, with the urbanization process in our country, the noise problem of mechanical cooling towers has become increasingly prominent, often causing environmental complaints and disputes.

According to my country's acoustic environment standard system (such as GB3096, GB12348, GB22337), within the same acoustic environment functional area, the nighttime noise limit is 10dB(A)-15dB(A) stricter than the daytime limit. However, once the above-mentioned mechanical cooling tower noise reduction device is installed and put into use, its noise reduction and ventilation effects are relatively fixed. As a result, in some projects, when the operating load of the cooling tower is large during the day, the ventilation effect of the noise reduction device cannot meet the requirements; while in other projects, when the noise limit at night is stricter, the noise reduction device The noise reduction effect can not meet the requirements. For this problem, it is particularly prominent when dealing with the water spray noise of the cooling tower (the corresponding position is the air inlet of the cooling tower).

Utility model content

In the present utility model, the present utility model provides a combined sheet type noise reduction device for mechanical cooling towers, the device includes: a main noise reduction device and a freely movable sub-type noise reduction device, wherein the The sub-muffler can be inserted into the parent muffling device;

The female muffler is a chip muffler structure, located at the air inlet on both sides or any side of the mechanical cooling tower, and the female muffler is fixedly connected to the air inlet;

The sub-muffler is a plate muffler structure;

The main muffler device is provided with a first muffler vane set, and the first muffler vane set includes a plurality of first muffler vanes;

The first silencing blades are arranged in parallel with each other, and the silencing air inlet channel is formed between the adjacent first silencing blades;

The sub-muffling device is provided with a strip plate and a second set of muffling blades;

The second silencing blade group includes a plurality of second silencing blades, and the second silencing blades are arranged in parallel with each other;

The first end of the second muffler vane is inserted into the strip plate, and the second end is exposed;

The pitch between adjacent first silencing blades is equal to the pitch between adjacent second silencing blades, and is used to fully insert the second end of the second silencing blade into the corresponding silencing air inlet channel .

In another preferred example, a hinge is provided on the top of the sub-muffling device for connecting to the parent muffling device.

In another preferred example, the material of the first silencing blade and the second silencing blade can be micro-perforated plate or centrifugal glass wool.

In another preferred example, the centrifugal glass wool is wrapped with alkali-free hydrophobic glass fiber cloth.

In another preferred example, the distance between the first noise-absorbing blades is 0.1m-0.5m;

The distance between the second sound-absorbing blades is 0.1m-0.5m.

In another preferred example, the thickness of the first muffling blade is 0.05m-0.15m;

The thickness of the second noise reduction blade is 0.05m-0.15m.

In another preferred example, the combined sheet-type noise reduction device is located on the side of the air inlet of the mechanical cooling tower facing the factory boundary, or facing the side where noise emission needs to be reduced due to other reasons.

In another preferred example, pulleys are provided at the bottom of the sub-muffling device.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the combined sheet type noise reduction device of embodiment 1;

Fig. 2 is a top view of the internal structure of the combined sheet type noise reduction device of embodiment 1.

detailed description

After extensive and in-depth research, the inventor first developed a combined chip muffler for mechanical cooling towers. The combined chip muffler includes a parent muffler and a sub muffler, which can The purpose of ventilation and noise reduction effect is achieved by adjusting the sub-muffling device.

the term

As used herein, the term "chip-type noise reduction device" refers to a commonly used noise reduction structure in the field. Generally, the described sheet-type noise reduction device can be made by the following method: insert plate-shaped noise reduction blades into the ventilation channel, and The channel is divided into several small channels. The size is not particularly limited, and generally can be calculated or designed according to the required noise reduction requirements, ventilation requirements, and channel cross-section.

The terms "micro-perforated plate sound-absorbing structure" and "micro-perforated plate" can be used interchangeably, and are commonly used sound-absorbing plate structures in the field. Generally, the micro-perforated plate can be produced by the following method: a thin plate with a thickness of less than 1.0 mm The top is pierced with micro-holes with a diameter of less than 1.0 mm, the perforation rate is between 1% and 5%, and an air layer with a certain thickness (such as 5cm-20cm) is left on the back. The interior of the air layer is filled with any sound-absorbing material.

Noise reduction device

The utility model provides a combined sheet type noise reduction device for mechanical cooling towers. The device includes: a main noise reduction device and a freely movable sub-type noise reduction device, wherein the sub-type noise reduction device can be Insert into the female muffler.

In the utility model, the female muffler is a plate muffler structure, located at the air inlet on both sides or any one side of the mechanical cooling tower, and the female muffler is fixedly connected to the air inlet.

In the utility model, the sub-muffling device is a plate type muffler structure.

In the present utility model, the female noise reduction device is provided with a first noise reduction blade group, and the first noise reduction blade group includes a plurality of first noise reduction blades.

In the present utility model, the first noise-absorbing blades are arranged in parallel with each other, and the adjacent first noise-absorbing blades form a noise-absorbing air inlet channel.

In the present utility model, the sub-muffling device is provided with a strip plate and a second set of muffling blades.

In the present utility model, the second muffling blade group includes a plurality of second muffling blades, and the second muffling blades are arranged in parallel with each other.

In the present utility model, the first end of the second noise-absorbing blade is inserted into the strip plate, and the second end is exposed outside.

In the present utility model, the distance between adjacent first silencing blades is equal to the distance between adjacent second silencing blades, and is used to fully insert the second ends of the second silencing blades into the corresponding silencing blades. sound into the wind channel.

Preferably, the top of the sub-muffling device is provided with a hinge for connecting to the parent muffling device.

In another preferred example, the material of the first silencing blade and the second silencing blade can be micro-perforated plate or centrifugal glass wool.

In another preferred example, the centrifugal glass wool is wrapped with alkali-free hydrophobic glass fiber cloth.

In another preferred example, the distance between the first noise-absorbing blades is 0.1m-0.5m;

The distance between the second sound-absorbing blades is 0.1m-0.5m.

In another preferred example, the thickness of the first muffling blade is 0.05m-0.15m;

The thickness of the second noise reduction blade is 0.05m-0.15m.

In another preferred example, the combined sheet-type noise reduction device is located on the side of the air inlet of the mechanical cooling tower facing the factory boundary, or facing the side where noise emission needs to be reduced due to other reasons.

In another preferred example, pulleys are provided at the bottom of the sub-muffling device.

The main advantages of the utility model include:

(a) The utility model adopts a combined sheet type noise reduction device, which can achieve the purpose of ventilation and noise reduction by adjusting the sub-type noise reduction device;

(b) When the outdoor temperature is high during the day, the equipment load is large, the ventilation requirements for the mechanical cooling tower are relatively high, and the noise reduction requirements are relatively low, the sub-muffling device is removed, and only the main muffling device is used Can play a ventilation function;

(c) When the outdoor temperature is low at night, the equipment load is small, the ventilation requirements for the mechanical cooling tower are relatively low, and the noise reduction requirements are relatively high, insert the sub-muffler device into the main muffling device, and use the main muffling device The sheet type noise reduction device combined with the device and the sub-type noise reduction device can play the role of noise reduction;

(d) The utility model is equipped with a sound-absorbing louver structure, which can play a good role in ventilation;

(e) Micro-perforated plates are arranged inside the practical noise-absorbing blades, which have good moisture resistance.

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. For the experimental methods without specific conditions indicated in the following examples, the conventional conditions or the conditions suggested by the manufacturer are usually followed. Percentages and parts are by weight unless otherwise indicated.

It should be noted that in the claims and description of this patent, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or Any such actual relationship or order between such entities or operations is implied. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Example 1

This embodiment provides a combined sheet type noise reduction device for mechanical cooling towers, as shown in Figures 1 and 2, the device includes: a parent noise reduction device 1 and a freely movable sub-type noise reduction device 2, wherein the sub-muffling device 2 can be inserted into the parent muffling device 1.

In this embodiment, the female muffler device 1 is a plate muffler structure, located at the air inlets on both sides of the mechanical cooling tower, and the female muffler device 1 is fixedly connected to the air inlet.

The sub-muffler device 2 is a plate type muffler structure.

The main muffler device 1 is provided with a first muffler vane set, and the first muffler vane set includes a plurality of first muffler vanes 3 .

The first silencing blades 3 are arranged in parallel with each other, and a silencing air inlet channel is formed between adjacent first silencing blades 3 .

The sub-muffling device 2 is provided with a strip plate 4 and a second set of muffling blades.

The second silencing blade set includes a plurality of second silencing blades 5 , and the second silencing blades 5 are arranged in parallel with each other.

The first end of the second muffler vane 5 is inserted into the strip plate 4 , and the second end is exposed outside.

The pitch of adjacent first silencing blades 3 is equal to the pitch of adjacent second silencing blades 5, for fully inserting the second end of the second silencing blades 5 into the corresponding silencing inlet. in the wind channel.

Example 2

This embodiment provides a combined chip muffler for mechanical cooling towers, which is basically the same as the combined chip muffler provided in Example 1, except that:

In this embodiment, the top of the sub-muffling device 2 is provided with a hinge for connecting the parent muffling device 1;

The material of the first silencing blade 3 and the second silencing blade 5 is centrifugal glass wool;

The centrifugal glass wool is wrapped with alkali-free hydrophobic glass fiber cloth;

The pitch of the first noise-absorbing blades 3 is 0.4m;

The distance between the second sound-absorbing blades 5 is 0.4m;

The thickness of the first muffler blade 3 is 0.1m;

The thickness of the second muffling blade 5 is 0.1m;

The combined chip muffler is located on the side of the air inlet of the mechanical cooling tower facing the factory boundary;

The bottom of the sub-muffler 2 is provided with a pulley.

Adopt the muffling device of embodiment 2, and set the muffling vane height of mother muffling device 1 and child muffling device 2 to be all taken as 1.5m, the length of muffling device is all set as 1m, the average sound absorption of muffling blade Set to 0.60.

Based on the above parameters, A.N. Belov's empirical calculation formula is used to theoretically calculate the noise reduction amount of the combination of the parent noise reduction device 1 and the child noise reduction device 2, and the measured noise reduction amount is 21dB.

Comparative example 1

Comparative Example 1 uses the same noise reduction device as in Example 2, the difference is that only the parent noise reduction device 1 is used in Comparative Example 1.

The muffling device of Comparative Example 1 was adopted, and the height of the muffling blades of the muffling device was set to be 1.5m, the length of the muffling device was set to 1m, and the average sound absorption of the muffling blades was set to 0.60.

Based on the above parameters, the noise reduction amount of the noise reduction device is theoretically calculated by A.N. Belov's empirical calculation formula, and the measured noise reduction amount is 8dB.

It can be seen that when the parent noise reduction device 1 and the child noise reduction device 2 are combined, the amount of noise reduction is significantly improved. On the other hand, when only the main noise reduction device 1 is used, the cross-sectional area of the ventilation duct of the device is twice that of the combination of the parent noise reduction device 1 and the child noise reduction device 2, and the ventilation effect is obviously improved.

Therefore, when the outdoor temperature is high during the day, the equipment load is large, the ventilation requirements for the mechanical cooling tower are relatively high, and the noise reduction requirements are relatively low, the sub-muffler 2 can be removed, and only the main muffler can be used. The sound device 1 plays a ventilation function; when the outdoor temperature is low at night, the equipment load is small, the ventilation requirements for the mechanical cooling tower are relatively low, and the noise reduction requirements are relatively high, the sub-muffler device 2 can be inserted into the parent The noise reduction device 1 utilizes the chip type noise reduction device combined by the parent noise reduction device 1 and the child noise reduction device 2 to perform the noise reduction function.

All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. In addition, it should be understood that after reading the above teaching content of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Claims (8)

1. A combined sheet type noise reduction device for mechanical cooling towers, characterized in that the device includes: a mother noise reduction device and a freely movable sub-type noise reduction device, wherein the sub-type noise reduction device can be inserted into said female muffler; The female muffler is a chip muffler structure, located at the air inlet on both sides or any side of the mechanical cooling tower, and the female muffler is fixedly connected to the air inlet; The sub-muffler is a plate muffler structure; The main muffler device is provided with a first muffler vane set, and the first muffler vane set includes a plurality of first muffler vanes; The first silencing blades are arranged in parallel with each other, and the silencing air inlet channel is formed between the adjacent first silencing blades; The sub-muffling device is provided with a strip plate and a second set of muffling blades; The second silencing blade group includes a plurality of second silencing blades, and the second silencing blades are arranged in parallel with each other; The first end of the second muffler vane is inserted into the strip plate, and the second end is exposed; The pitch between adjacent first silencing blades is equal to the pitch between adjacent second silencing blades, and is used to fully insert the second end of the second silencing blade into the corresponding silencing air inlet channel . 2. The noise reduction device according to claim 1, wherein a hinge is provided on the top of the sub-type noise reduction device for connecting the parent noise reduction device. 3. The noise reduction device according to claim 1, wherein the material of the first noise reduction blade and the second noise reduction blade can be micro-perforated plate or centrifugal glass wool. 4. The noise reduction device according to claim 3, wherein the centrifugal glass wool is wrapped with alkali-free hydrophobic glass fiber cloth. 5. The noise reduction device according to claim 1, characterized in that, the distance between the first noise reduction blades is 0.1m-0.5m; The distance between the second sound-absorbing blades is 0.1m-0.5m. 6. The noise reduction device according to claim 1, characterized in that, the thickness of the first noise reduction blade is 0.05m-0.15m; The thickness of the second noise reduction blade is 0.05m-0.15m. 7. The noise reduction device according to claim 1, characterized in that, the combined sheet type noise reduction device is located on the side of the air inlet of the mechanical cooling tower facing the factory boundary, or facing the side where noise needs to be reduced due to other reasons. discharge side. 8. The noise reduction device according to claim 1, wherein a pulley is provided at the bottom of the sub-type noise reduction device.