A replaceable sound-absorbing cotton type fan silencer

Abstract

This utility model relates to the field of noise reduction device technology, specifically to a replaceable sound-absorbing cotton type fan silencer. The silencer includes an inner cylinder and an outer cylinder, which together enclose a mounting cavity. The inner cylinder has several mounting openings along its circumference that communicate with the mounting cavity. Several movable perforated plates, corresponding one-to-one with the mounting openings, are hinged to the inner side of the inner cylinder. The movable perforated plates can cover the corresponding mounting openings. The free ends of the movable perforated plates are detachably connected to the inner cylinder. A first sound-absorbing cotton is provided inside the mounting cavity. When it is necessary to replace the sound-absorbing cotton, simply detach the free ends of the movable perforated plates from the inner cylinder to open the mounting openings, and then remove the first sound-absorbing cotton from the mounting openings for easy replacement.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction device technology, specifically to a replaceable sound-absorbing cotton type fan silencer. Background Technology

[0002] Mining fans are a type of ventilation equipment widely used in the excavation of large and small cross-section roadways in coal mines for long-distance ventilation.

[0003] Most existing mine ventilation fan silencers adopt a double-cylinder structure. The inner cylinder is made of perforated plate, and several sound-absorbing cotton strips are arranged along the circumference between the inner and outer cylinders. The two ends of the inner and outer cylinders are connected by flanges, which are welded to both the inner and outer cylinders, so that the inner and outer cylinders and flanges together enclose the sound-absorbing cotton on the inside. Airflow passes through the inside of the inner cylinder and absorbs the fan noise through the sound-absorbing cotton.

[0004] This type of sound-absorbing structure has a good noise reduction effect in the early stages of fan operation. However, as dust accumulates on the sound-absorbing cotton, it can clog the sound-absorbing holes, significantly weakening the noise reduction performance and increasing the fan's operating noise. To maintain the sound-absorbing effect, the sound-absorbing cotton needs to be replaced. Because the ends of the inner and outer cylinders are welded to the flanges, the entire inner cylinder needs to be removed to replace the sound-absorbing cotton, making the replacement inconvenient. Utility Model Content

[0005] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is to provide a replaceable sound-absorbing cotton type fan silencer, which allows for convenient replacement of the sound-absorbing cotton and improves the replacement efficiency of the sound-absorbing cotton.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A replaceable sound-absorbing cotton type fan silencer includes an inner cylinder and an outer cylinder, which together enclose an installation cavity. The inner cylinder has several installation ports communicating with the installation cavity along its circumference. Several movable perforated plates corresponding to the installation ports are hinged to the inner side of the inner cylinder. The movable perforated plates can cover the corresponding installation ports. The free ends of the movable perforated plates are detachably connected to the inner cylinder. A first sound-absorbing cotton is provided inside the installation cavity.

[0008] By adopting the above solution, when the sound-absorbing cotton needs to be replaced, it is only necessary to disassemble the free end of the movable mesh plate from the inner cylinder to open the installation port. The first sound-absorbing cotton inside the installation port can then be easily removed for replacement. Furthermore, for mining fans installed horizontally, the fan silencer is also placed horizontally. With existing fan silencers, several sound-absorbing cotton strips need to be replaced after removing the inner cylinder. When replacing with new sound-absorbing cotton, a ring is needed to support all the strips. If the ring is not used, the upper part of the sound-absorbing cotton will fall downwards before the inner cylinder is installed, making installation inconvenient. With the solution of this application, after the sound-absorbing cotton is placed in the installation cavity, both the inner cylinder and the movable mesh plate can support the sound-absorbing cotton, making it difficult for the upper part to fall. There is no need to set up a separate support for the upper part of the sound-absorbing cotton, making installation much more convenient.

[0009] Preferably, the mounting cavity is provided with several partitions, and both the inner and outer cylinders are fixedly connected to the partitions. The partitions enhance the connection stability between the inner and outer cylinders.

[0010] Preferably, the partitions are distributed along the circumference of the inner cylinder, dividing the mounting cavity into several mounting slots that correspond one-to-one with the mounting openings. All mounting slots are fitted with first sound-absorbing cotton. The mounting slots conveniently restrict the position of the first sound-absorbing cotton, and the one-to-one correspondence between the mounting slots and mounting openings facilitates the installation and removal of the sound-absorbing cotton.

[0011] Preferably, the movable perforated plate is an arc-shaped plate.

[0012] Preferably, the inner cylinder has a tapered guide tube on its inner side, which is fixedly connected to the inner cylinder by several supporting ribs. The guide tube has several mesh holes, and a second sound-absorbing cotton is placed inside the guide tube. The second sound-absorbing cotton inside the guide tube further improves the sound absorption effect.

[0013] Preferably, the guide tube includes a cone cap, a cone tube, a core tube, and an end cap connected in sequence. The cone tube and the core tube are both made of perforated plate, and the end cap is located at the end of the cone tube with a larger diameter.

[0014] Preferably, both the core cylinder and the cone cylinder are fixedly connected to the inner cylinder by four supporting ribs, which are evenly distributed along the circumference of the inner cylinder. Fixing the cone cylinder and the core cylinder with four supporting ribs respectively improves the stability of the connection between the overall guide tube and the inner cylinder.

[0015] Preferably, the end cap is detachably connected to the cone. The end cap allows for easy installation of a second sound-absorbing cotton that matches the shape of the cone-shaped guide tube.

[0016] Preferably, both ends of the inner cylinder are fixedly connected with connecting flanges.

[0017] Preferably, the length of the outer cylinder is less than the length of the inner cylinder, the first end of the outer cylinder is fixedly connected to the corresponding connecting flange, and the second end of the outer cylinder is fixedly connected to the inner cylinder through an annular sealing plate. The inner cylinder, outer cylinder, sealing plate, and connecting flange corresponding to the first end of the outer cylinder together enclose the mounting cavity.

[0018] In summary, the replaceable sound-absorbing cotton type fan silencer provided by this utility model has at least the following beneficial effects:

[0019] 1. When replacing the sound-absorbing cotton, there is no need to use additional supports to fix the sound-absorbing cotton, making the installation and removal of the sound-absorbing cotton strips more efficient.

[0020] 2. By confining the sound-absorbing cotton within the corresponding installation slots, multiple individual sound-absorbing modules are formed, which not only improves the sound absorption effect but also enhances the stability of the connection between the inner and outer cylinders. Attached image description:

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any novel effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention from the right-hand perspective;

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention from the left-hand perspective;

[0024] Figure 3 This is the right view of this utility model;

[0025] Figure 4 yes Figure 3 Sectional view at point AA;

[0026] Figure 5 This is the front view of this utility model;

[0027] Figure 6 yes Figure 5 Sectional view at point BB;

[0028] Figure 7 After the first sound-absorbing cotton was hidden Figure 5 Sectional view at point BB;

[0029] Figure 8 When the first sound-absorbing cotton is hidden and the movable mesh plate is opened Figure 5 Sectional view at point BB;

[0030] Figure 9 This is an exploded view of the present invention.

[0031] The reference numerals in the attached drawings include: inner cylinder 1, outer cylinder 2, mounting port 3, movable perforated plate 4, first sound-absorbing cotton 5, partition plate 6, mounting groove 7, guide tube 8, cone cap 801, cone tube 802, core tube 803, end cap 804, support rib 9, second sound-absorbing cotton 10, connecting flange 11, sealing plate 12, support part 13, hinge 14, and buckle 15. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-9 The present invention will be further described in detail below with reference to specific embodiments.

[0033] Please see Figure 1-9 This embodiment provides a replaceable sound-absorbing cotton type fan silencer, including an inner cylinder 1 and an outer cylinder 2. The inner cylinder 1 and outer cylinder 2 together enclose an installation cavity. The inner cylinder 1 has several installation ports 3 along its circumference, communicating with the installation cavity. Several movable mesh plates 4, corresponding one-to-one with the installation ports 3, are hinged to the inner side of the inner cylinder 1. The movable mesh plates 4 can cover the corresponding installation ports 3. The movable mesh plates 4 are arc-shaped plates, with the arc center coinciding with the center of the inner cylinder 1. The free end of the movable mesh plate 4 is detachably connected to the inner cylinder 1. A first sound-absorbing cotton 5 is provided inside the installation cavity. In this embodiment, eight installation ports 3 are preferably provided, corresponding to eight movable mesh plates 4. One end of the movable mesh plate 4 along the circumference of the inner cylinder 1 is connected to the inner cylinder 1 via a hinge 14, and the other end of the movable mesh plate 4 along the circumference of the inner cylinder 1 can be detachably connected to the inner cylinder 1 via a buckle 15.

[0034] Please see Figure 6-9 The mounting cavity is equipped with several partitions 6, and both the inner cylinder 1 and the outer cylinder 2 are fixedly connected to the partitions 6. The partitions 6 are evenly distributed along the circumference of the inner cylinder 1, dividing the mounting cavity into several mounting slots 7 corresponding one-to-one with the mounting openings 3. All mounting slots 7 are fitted with first sound-absorbing cotton 5. In this embodiment, preferably, two strips of first sound-absorbing cotton 5 are installed in each mounting slot 7. In this embodiment, preferably, eight partitions 6 are provided.

[0035] Please see Figure 4The inner cylinder 1 has a conical guide tube 8 on its inner side. The guide tube 8 is fixedly connected to the inner cylinder 1 by several supporting ribs 9. The guide tube 8 has several mesh holes, and a second sound-absorbing cotton 10 is placed inside the guide tube 8. The shape of the second sound-absorbing cotton 10 matches that of the guide tube 8, and the second sound-absorbing cotton 10 can fill the internal space of the guide tube 8. The guide tube 8 includes a conical cap 801, a conical cylinder 802, a core cylinder 803, and an end cap 804 connected sequentially from right to left. Both the conical cylinder 802 and the core cylinder 803 are made of perforated plates. The diameter of the conical cylinder 802 gradually decreases from left to right. The end cap 804 is located at the end of the conical cylinder 802 with the larger diameter, that is, at the left end of the conical cylinder 802. The outer diameter of the conical cylinder 802 is smaller than the inner diameter of the inner cylinder 1, and there is a gap between the inner cylinder 1 and the guide tube 8. When in use, the airflow generated by the mine blower can pass through the gap between the inner cylinder 1 and the guide cylinder 8. When the airflow passes through the gap between the inner cylinder 1 and the guide cylinder 8, both the first sound-absorbing cotton 5 and the second sound-absorbing cotton 10 can play a role in sound absorption, thus enhancing the sound absorption effect.

[0036] Please see Figure 1 and Figure 2 Both the core cylinder 803 and the cone cylinder 802 are fixedly connected to the inner cylinder 1 by four supporting ribs 9, which are evenly distributed along the circumference of the inner cylinder 1. The end cap 804 is detachably connected to the cone cylinder 802, specifically by bolts. For easy connection with the mine ventilation fan, connecting flanges 11 are fixedly connected to both ends of the inner cylinder 1. The second sound-absorbing cotton 10 can be easily installed and removed by removing the end cap 804.

[0037] Please see Figure 1 , Figure 4 and Figure 9 The outer cylinder 2 is shorter than the inner cylinder 1. The first end of the outer cylinder 2 is fixedly connected to the corresponding connecting flange 11. The second end of the outer cylinder 2 is fixedly connected to the inner cylinder 1 via an annular sealing plate 12. The inner cylinder 1, outer cylinder 2, sealing plate 12, and the connecting flange 11 corresponding to the first end of the outer cylinder 2 together form an installation cavity. The left end of the outer cylinder 2 is the first end of the outer cylinder 2, and the right end is the second end of the outer cylinder 2. That is, the left end of the outer cylinder 2 is flush with the left end of the inner cylinder 1 and is fixedly connected to the connecting flange 11 located at the left end of the inner cylinder 1. The right end of the outer cylinder 2 is spaced from the connecting flange 11 located at the right end of the inner cylinder 1. The right end of the outer cylinder 2 is connected to the inner cylinder 1 via an annular sealing plate 12. Both the outer cylinder 2 and the inner cylinder 1 are fixedly connected to the sealing plate 12.

[0038] Please see Figure 9 The inner cylinder 1 has a gap between its left and right ends and the edge of the mounting port 3, thus forming annular support portions 13 at both ends of the inner cylinder 1. When the first sound-absorbing cotton 5 is installed, the left and right ends of the first sound-absorbing cotton 5 can be supported on the support portions 13, and the support portions 13 can provide support for the left and right ends of the first sound-absorbing cotton 5.

[0039] By adopting the above solution, when the sound-absorbing cotton needs to be replaced, it is only necessary to disassemble the free end of the movable mesh plate 4 from the inner cylinder 1, thereby opening the installation port 3, and then taking out the first sound-absorbing cotton 5 inside the installation port 3 for easy replacement. Furthermore, for mine fans that are installed horizontally during use, the fan silencer is also placed horizontally. With existing fan silencers, several sound-absorbing cotton strips need to be replaced after removing the inner cylinder 1. When replacing the new sound-absorbing cotton, a ring is needed to support all the strips of sound-absorbing cotton. If the ring is not used to support the sound-absorbing cotton, the upper part of the sound-absorbing cotton will fall downwards before the inner cylinder 1 is installed in place, making installation inconvenient. With the solution of this application, after the sound-absorbing cotton is placed in the installation cavity, both the inner cylinder 1 and the movable mesh plate 4 can support the sound-absorbing cotton, making it difficult for the upper part of the sound-absorbing cotton to fall off. There is no need to set up a separate support to hold the upper part of the sound-absorbing cotton, making the installation of the sound-absorbing cotton much more convenient.

[0040] Please see Figure 8 After unlocking the buckle 15 on the left end of one of the upper movable mesh plates 4, the movable mesh plate 4 can be opened downwards, thereby opening the corresponding mounting port 3.

[0041] It should be noted that words indicating direction in this article, such as "up" and "down," are all in the format of "upper" and "lower." Figure 1 The direction setting is for ease of description only and has no other specific meaning.

[0042] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0043] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A replaceable sound attenuating cotton type fan silencer, characterized by, include: The inner cylinder (1) and the outer cylinder (2) together enclose an installation cavity. The inner cylinder (1) has several installation ports (3) that communicate with the installation cavity along the circumferential direction. Several movable mesh plates (4) corresponding to the installation ports (3) are hinged to the inner side of the inner cylinder (1). The movable mesh plates (4) can cover the corresponding installation ports (3). The free end of the movable mesh plates (4) is detachably connected to the inner cylinder (1). The installation cavity is provided with a first sound-absorbing cotton (5).

2. A replaceable sound attenuating cotton fan silencer according to claim 1, characterized in that The installation cavity is provided with several partitions (6), and the inner cylinder (1) and the outer cylinder (2) are fixedly connected to the partitions (6).

3. A replaceable sound attenuating cotton fan silencer according to claim 2, characterized in that The partition (6) is distributed along the circumference of the inner cylinder (1). The partition (6) divides the installation cavity into several installation slots (7) that correspond one-to-one with the installation port (3). All the installation slots (7) are inlaid with first sound-absorbing cotton (5).

4. A replaceable sound attenuating cotton fan silencer as claimed in claim 1, wherein, The movable perforated plate (4) is an arc-shaped plate.

5. A replaceable sound attenuating cotton fan silencer according to any one of claims 1-4, characterized in that, The inner cylinder (1) has a conical guide tube (8) on its inner side. The guide tube (8) is fixedly connected to the inner cylinder (1) by several support ribs (9). The guide tube (8) has several mesh holes. The guide tube (8) has a second sound-absorbing cotton (10) inside.

6. A replaceable sound attenuating cotton fan silencer according to claim 5, characterized in that The guide tube (8) includes a cone cap (801), a cone tube (802), a core tube (803) and an end cap (804) connected in sequence. The cone tube (802) and the core tube (803) are both made of perforated plate. The end cap (804) is located at the end of the cone tube (802) with a larger diameter.

7. A replaceable sound attenuating cotton fan silencer according to claim 6, characterized in that The core cylinder (803) and the cone cylinder (802) are both fixedly connected to the inner cylinder (1) by four supporting ribs (9), and the supporting ribs (9) are evenly distributed along the circumference of the inner cylinder (1).

8. A replaceable sound attenuating cotton fan silencer according to claim 6, characterized in that The end cap (804) is detachably connected to the cone (802).

9. A replaceable sound attenuator according to claim 1, wherein Both ends of the inner cylinder (1) are fixedly connected with connecting flanges (11).

10. A replaceable sound attenuator according to claim 9, wherein The length of the outer cylinder (2) is less than the length of the inner cylinder (1). The first end of the outer cylinder (2) is fixedly connected to the corresponding connecting flange (11). The second end of the outer cylinder (2) is fixedly connected to the inner cylinder (1) through an annular sealing plate (12). The inner cylinder (1), the outer cylinder (2), the sealing plate (12), and the connecting flange (11) corresponding to the first end of the outer cylinder (2) together enclose the mounting cavity.

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