Flow guide type local fan silencer

Abstract

The utility model relates to a diversion type local fan silencer, which belongs to the technical field of silencers, and comprises a shell, the shell is provided with an air inlet and an air outlet, both the air inlet and the air outlet can be connected with a fan flange, a silencing core is arranged in the shell, a silencing material layer is arranged on the silencing core, the silencing core is arranged in the middle of the shell, and the silencing material layer is arranged on the silencing core. A plurality of flow deflectors are arranged at the air inlet and extend into the shell from the air inlet. According to the utility model, the plurality of arc-shaped silencing plates consistent with the arc-shaped direction of the bent cylinder are arranged in the bent cylinder, so that the silencing effect is effectively improved. The silencing plate is connected with the groove in the support in an abutting and matched mode, the fixing plug is arranged, so that the silencing plate and the groove are connected more firmly, it is guaranteed that the silencer cannot be loosened due to vibration and the like in the long-time using process, and the silencing effect is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of silencers, and in particular relates to a guide-type local fan silencer. Background Art

[0002] Underground mine operations require ventilation, most commonly achieved through local ventilation fans, specifically those designed for tunneling operations that are appropriately matched to the ventilation parameters of the coal mine tunnels. However, these fans generate harsh airflow and mechanical noise, which can affect the physical and mental health of workers during mine operations. Furthermore, these fans can hinder the ability to hear other danger signals in the tunnels, posing a potential safety hazard.

[0003] Chinese patent number CN220037088U discloses a muffler for an underground local fan. Since the patent includes a muffler structure, no matter whether the muffler is arranged at the front or rear end of the fan, the airflow of the fan has a certain impact effect on the muffler, which will generate airflow noise. Therefore, it is urgent to design a guide-type local fan muffler that can reduce airflow noise to solve the above-mentioned problem. Utility Model Content

[0004] In order to overcome the defects of the prior art, the purpose of the present invention is to provide a guide-type local fan silencer to solve the problem of inconvenience in use in the prior art.

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

[0006] A guide-type local fan silencer includes a shell, the shell having an air inlet and an air outlet, the air inlet and the air outlet both of which can be connected to a fan flange, a silencer core is provided in the shell, a silencer material layer is provided on the silencer core, the silencer core is provided in the middle of the shell, and a plurality of guide vanes are provided at the air inlet, and the guide vanes extend from the air inlet to the interior of the shell.

[0007] Furthermore, the guide plate is a spiral plate, and the guide plate is fixedly connected to the inner wall of the shell.

[0008] Furthermore, a bracket is provided in the shell, the silencer core is fixed on the bracket, and the end of the bracket is fixedly connected to the inner wall of the shell.

[0009] Furthermore, the air inlet is in a trumpet-shaped shape.

[0010] Furthermore, a sound-absorbing layer is provided on the inner wall between the shell and the guide plate.

[0011] Furthermore, the bracket is composed of at least one support rod, and the end of the support rod is connected to the shell.

[0012] Furthermore, the sound-absorbing material layer is made of at least one sound-absorbing material, and the sound-absorbing material is one or more of glass fiber, rock wool, and foam aluminum.

[0013] Furthermore, the cross section of the guide vane adopts a streamlined design to reduce airflow resistance and improve the sound-absorbing effect.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This utility model provides a guide-type local fan silencer. In this device, several guide vanes are installed at the air inlet, extending from the air inlet into the interior of the housing. These guide vanes are designed as spiral plates and are fixedly connected to the inner wall of the housing. They help guide the airflow for even distribution, reduce turbulence and eddies within the silencer, thereby reducing airflow resistance and improving the silencer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the device of the utility model.

[0017] In the figure: 1. shell, 2. air inlet, 3. air outlet, 4. silencer core, 5. silencer material layer, 6. guide plate, 7. bracket, 8. support rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1

[0020] like Figure 1 As shown, the present invention provides an embodiment of a guide-type local fan silencer, including a shell 1, wherein the shell 1 has an air inlet 2 and an air outlet 3, and the air inlet 2 and the air outlet 3 can both be connected to the fan flange. The embodiment of the present invention is arranged at the air inlet end of the fan and serves as an inlet silencer, and is arranged at the air outlet end of the fan and serves as an outlet silencer. In the embodiment of the present invention, flanges are arranged on both sides of the shell 1 to facilitate fixed connection with the fan shell. A silencer core 4 is arranged in the shell 1, and a silencer material layer 5 is arranged on the silencer core 4. The silencer core 4 is a conical silencer mechanism, which is arranged in the middle of the shell 1 of the silencer and is used to eliminate the noise generated by the fan airflow. A plurality of guide vanes 6 are arranged at the air inlet 2, and the guide vanes 6 extend from the air inlet 2 to the inside of the shell 1.

[0021] The guide vane 6 is a spiral plate, and the guide vane 6 is fixedly connected to the inner wall of the shell 1. The cross-section of the guide vane 6 adopts a streamlined design to reduce the airflow resistance and improve the sound-absorbing effect. In the embodiment of the present utility model, the guide vane adopts a spiral plate design and is fixedly connected to the inner wall of the shell, which helps to guide the airflow to be evenly distributed, reduce the turbulence and eddy current of the airflow inside the muffler, thereby reducing the airflow resistance and improving the sound-absorbing effect. In the embodiment of the present utility model, the guide vane 6 can be set as a ridge-shaped guide vane for guiding the airflow, and the spiral rotation direction of the guide vane 6 is consistent with the rotation direction of the fan airflow, which is used to guide the airflow entering or out of the fan to the spiral rotation direction of the fan airflow, and guide the airflow to the spiral rotation direction through the muffler, thereby reducing the impact of the airflow on the muffler shell and enhancing the sound-absorbing effect.

[0022] A bracket 7 is provided in the housing 1 , the silencer core 4 is fixed on the bracket 7 , and an end of the bracket 7 is fixedly connected to the inner wall of the housing 1 .

[0023] The air inlet 2 is in a trumpet shape.

[0024] A sound-absorbing layer is provided on the inner wall between the housing 1 and the guide plate 6 .

[0025] The bracket 7 is composed of at least one support rod 8 , and an end of the support rod 8 is connected to the housing 1 .

[0026] The sound-absorbing material layer 5 is made of at least one sound-absorbing material, and the sound-absorbing material is one or more of glass fiber, rock wool, and foam aluminum.

[0027] Of course, the above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A flow-guiding local fan silencer, comprising a housing (1), characterized in that: The shell (1) has an air inlet (2) and an air outlet (3), and both the air inlet (2) and the air outlet (3) can be connected to the fan flange. A silencer core (4) is provided in the shell (1), and a silencer material layer (5) is provided on the silencer core (4). The silencer core (4) is arranged in the middle of the shell (1). A plurality of guide plates (6) are provided at the air inlet (2), and the guide plates (6) extend from the air inlet (2) to the inside of the shell (1).

2. The guide-type local fan silencer according to claim 1, characterized in that: The guide plate (6) is a spiral plate, and the guide plate (6) is fixedly connected to the inner wall of the shell (1).

3. The flow-guiding local fan silencer according to claim 1, characterized in that: A bracket (7) is provided in the shell (1), the silencer core (4) is fixed on the bracket (7), and the end of the bracket (7) is fixedly connected to the inner wall of the shell (1).

4. The flow-guiding local fan silencer according to claim 1, characterized in that: The air inlet (2) is in a trumpet-shaped shape.

5. The flow-guiding local fan silencer according to claim 1, characterized in that: A sound-absorbing layer is provided on the inner wall between the housing (1) and the guide plate (6).

6. The flow-guiding local fan silencer according to claim 3, characterized in that: The bracket (7) is composed of at least one support rod (8), and the end of the support rod (8) is connected to the housing (1).

7. The flow-guiding local fan silencer according to claim 1, characterized in that: The sound-absorbing material layer (5) is made of at least one sound-absorbing material, and the sound-absorbing material is one or more of glass fiber, rock wool, and foam aluminum.

8. The flow-guiding local fan silencer according to claim 2, characterized in that: The cross section of the guide plate (6) adopts a streamlined design to reduce airflow resistance and improve the noise reduction effect.

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