A silencer for a vacuum generator

Abstract

This utility model relates to a silencer for a vacuum generator, comprising a housing and a accommodating cavity for housing the external vacuum generator. An exhaust silencer channel is provided within the housing, including an inlet end and an outlet end. The exhaust silencer channel connects to the exhaust port of the external vacuum generator near the inlet end, and the outlet end connects to the outside. Gas discharged from the outlet travels along the exhaust silencer channel to the outlet end and is discharged outwards. The total length of the gas's trajectory within the exhaust silencer channel is greater than the total length of the exhaust silencer channel extending from the inlet end to the outlet end. The silencer is positioned around the outside of the vacuum generator, resulting in a relatively long exhaust silencer channel. Furthermore, the exhaust silencer channel contains obstructions or bends, causing the gas's trajectory within the channel to be curved, thus extending the gas's travel distance and effectively improving noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of vacuum generator technology, and in particular to a silencer cover for a vacuum generator. Background Technology

[0002] A vacuum generator is a vacuum component that uses a positive pressure air source to generate negative pressure. It is characterized by high efficiency, cleanliness, economy, and small size, making it easy and convenient to obtain negative pressure in places where compressed air is available or in a pneumatic system where both positive and negative pressure are needed simultaneously. Therefore, vacuum generators are widely used in industrial production. However, because vacuum generators need to continuously discharge high-speed airflow during operation, they generate significant noise, reaching approximately 90 decibels. Prolonged exposure to this noise environment can cause health problems for workers.

[0003] Therefore, existing technologies often install silencers at the exhaust port of vacuum generators to reduce exhaust noise. For example, Chinese utility model patent CN222334125U discloses a vacuum generator with an improved structure, which effectively reduces the noise generated at the exhaust port by setting a noise reduction tube connected to the exhaust port. Another example is Chinese utility model patent CN210715317U, which discloses a low-noise vacuum generator, which also reduces exhaust noise by connecting a silencer component in the exhaust port of the vacuum generator body.

[0004] The silencers in the prior art generally absorb some noise by setting sound-absorbing material inside. Due to the limitation of installation space, the length of the silencer is generally short. Therefore, within a short stroke, the amount of noise absorbed by the sound-absorbing material is limited, resulting in poor noise reduction effect.

[0005] Therefore, it is necessary to provide a technical solution to address the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a silencer cover for a vacuum generator, which can solve the technical problem that the noise reduction effect of setting a silencer at the exhaust port of a vacuum generator is not good in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A silencer for a vacuum generator includes a housing and a accommodating cavity for housing an external vacuum generator. An exhaust silencer channel is provided within the housing, comprising an inlet end and an outlet end. The exhaust silencer channel is connected to the exhaust port of the external vacuum generator near the inlet end, and the outlet end of the exhaust silencer channel is connected to the outside. Gas discharged from the outlet travels along the exhaust silencer channel to the outlet end and is discharged outwards. The total length of the gas's trajectory within the exhaust silencer channel is greater than the total length of the exhaust silencer channel extending from the inlet end to the outlet end.

[0009] Furthermore, the exhaust muffler channel is provided with a number of blocking components, which can extend the total length of the gas's trajectory in the exhaust muffler channel.

[0010] Furthermore, the blocking component is an arc-shaped baffle, and the two sides of the arc-shaped baffle are respectively fixedly connected to the exhaust muffler channel. A vent is formed between the top or bottom end of each arc-shaped baffle and the exhaust muffler channel.

[0011] Furthermore, along the direction extending from the air inlet to the air outlet of the exhaust muffler channel, vents are alternately formed between the top of the arc-shaped baffle and the exhaust muffler channel, and between the bottom of the arc-shaped baffle and the exhaust muffler channel.

[0012] Furthermore, the inner wall surface of the exhaust silencing channel and the outer surface of the blocking member are both provided with sound-absorbing material.

[0013] Furthermore, the exhaust silencing channel has an opening on the side that contacts the external vacuum generator.

[0014] Furthermore, the sound-absorbing material extends from the inner wall surface through the opening to the outer wall surface of the exhaust silencing channel.

[0015] Furthermore, the exhaust muffler channel has an exhaust port that communicates with the outside at a position near the exhaust end.

[0016] Furthermore, the housing includes a first longitudinal housing, a first transverse housing, and a second longitudinal housing connected in sequence, with the first longitudinal housing, the first transverse housing, and the second longitudinal housing surrounding each other to form the accommodating cavity.

[0017] Furthermore, both the first longitudinal shell and the second longitudinal shell have a supporting lug at the end away from the first transverse shell, and the supporting lug has a connecting through hole.

[0018] The beneficial effects of this utility model are as follows: By setting the silencer around the outside of the vacuum generator, the length of the exhaust silencer channel is greater than the length of the general silencer in the prior art. In addition, the interior of the exhaust silencer channel is also equipped with blocking parts or bends in the air passage, so that the gas travels in the exhaust silencer channel in a curved shape. That is, the total length of the gas travels in the exhaust silencer channel is greater than the total length of the exhaust silencer channel from the inlet end to the outlet end, thereby further extending the gas travels in the exhaust silencer channel, greatly increasing the amount of noise absorbed in the exhaust silencer channel, and effectively improving the noise reduction effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the silencer cover for a vacuum generator according to the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of the silencer cover for a vacuum generator according to the present invention.

[0021] Figure 3 This is a schematic diagram of the silencer cover for a vacuum generator and the vacuum generator of this utility model.

[0022] Figure 4 This is a schematic diagram of the silencer cover for a vacuum generator and the assembled vacuum generator according to the present invention.

[0023] Figure 5 This is a schematic diagram of another structure of the silencing cover for the vacuum generator and the assembled vacuum generator according to the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of the sound-absorbing material of this utility model placed in the exhaust silencing channel.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-Shell; 11-First longitudinal shell; 12-First transverse shell; 13-Second longitudinal shell; 14-Support lug; 15-Connecting through hole; 2-Accommodation cavity; 3-Vacuum generator; 31-Exhaust port; 32-Intake port; 33-Inlet port; 5-Exhaust silencer channel; 51-Inlet end; 52-Outlet end; 53-Inner wall surface; 54-Opening; 55-Outer wall surface; 56-Outlet through hole; 6-Arc-shaped baffle; 65-Ventilation port; 8-Sound-absorbing material. Detailed Implementation

[0027] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0028] like Figures 1 to 2 As shown, this utility model provides a silencer for a vacuum generator, including a housing 1 and a accommodating cavity 2. The accommodating cavity 2 is used to house an external vacuum generator 3. An exhaust silencer channel 5 is provided inside the housing 1. The exhaust silencer channel 5 includes an inlet end 51 and an outlet end 52. The exhaust silencer channel 5 communicates with the exhaust port 31 of the external vacuum generator 3 near the inlet end 51. The outlet end 52 of the exhaust silencer channel 5 communicates with the outside. The gas discharged from the exhaust port 31 travels along the exhaust silencer channel 5 to the outlet end 52 and is discharged outward. The total length of the gas's trajectory in the exhaust silencer channel 5 is greater than the total length of the exhaust silencer channel 5 extending from the inlet end 51 to the outlet end 52. Specifically, the housing 1 is inverted U-shaped, including a first longitudinal housing 11, a first transverse housing 12, and a second longitudinal housing 13 connected in sequence. The first longitudinal housing 11, the first transverse housing 12, and the second longitudinal housing 13 surround to form the accommodating cavity 2. Of course, in other embodiments, the housing 1 can also be of other shapes, as long as it can cover the outside of the vacuum generator 3, which will not be described in detail here.

[0029] like Figure 3-5 As shown, the air inlet 33 and air intake 32 of the vacuum generator 3 are respectively located on the front and rear end faces of the vacuum generator 3, and the exhaust port 31 is located on the side wall of the vacuum generator 3 away from the air inlet 33. In actual use, a silencer is placed on the outside of the vacuum generator 3. At this time, the exhaust port 31 is surrounded by the silencer, while the air inlet 33 and air intake 32 are outside the silencer. The silencer does not affect the operation of the air inlet 33 and air intake 32. The gas discharged from the exhaust port 31 of the vacuum generator 3 enters the exhaust silencer channel 5. The air inlet end 51 is not connected to the outside, while the air outlet end 52 is connected to the outside. Therefore, the gas entering the exhaust silencer channel 5 flows towards the air outlet end 5. The gas moves in the direction of 2; and since the muffler is set around the outside of the vacuum generator 3, the length of the exhaust muffler channel 5 is greater than the length of a general muffler in the prior art. In addition, the exhaust muffler channel 5 in this embodiment is also equipped with blocking parts or bends in the air passage, so that the gas travels in the exhaust muffler channel 5 in a curved shape. This means that the total length of the gas travels in the exhaust muffler channel 5 is greater than the total length of the exhaust muffler channel 5 from the inlet end 51 to the outlet end 52, thereby further extending the gas travels in the exhaust muffler channel 5, greatly increasing the amount of noise absorbed in the exhaust muffler channel 5, and effectively improving the noise reduction effect.

[0030] Furthermore, such as Figure 2As shown, the exhaust muffler channel 5 is provided with several obstructions, which can extend the total length of the gas's travel trajectory in the exhaust muffler channel 5. In this embodiment, by providing obstructions, the gas needs to bypass the obstructions when running in the exhaust muffler channel 5, thereby extending the gas's travel distance in the exhaust muffler channel 5.

[0031] Specifically, the blocking member is an arc-shaped baffle 6, with both sides of the arc-shaped baffle 6 fixedly connected to the exhaust muffler channel 5. A vent 65 is formed between the top or bottom of each arc-shaped baffle 6 and the exhaust muffler channel 5. Of course, in other embodiments, the blocking member can also be of other shapes, which will not be elaborated here. Preferably, along the direction extending from the air inlet end 51 to the air outlet end 52 of the exhaust muffler channel 5, vents 65 formed between the top of the arc-shaped baffle 6 and the exhaust muffler channel 5, and vents 65 formed between the bottom of the arc-shaped baffle 6 and the exhaust muffler channel 5 are alternately arranged. In this embodiment, as shown... Figure 2 As shown, the arc-shaped baffle 6 is disposed in the first transverse housing 12. The vent 65 formed between the top of the arc-shaped baffle 6 and the exhaust muffler channel 5 is the upper vent, and the vent 65 formed between the bottom of the arc-shaped baffle 6 and the exhaust muffler channel 5 is the lower vent. By alternately setting the upper vent and the lower vent, the gas passes through the upper vent and the lower vent in sequence, which helps to extend the running distance of the gas in the exhaust muffler channel 5.

[0032] Furthermore, such as Figure 6 As shown, the inner wall surface 53 of the exhaust silencing channel 5 and the outer surface of the blocking member are both provided with sound-absorbing material 8. In this embodiment, by providing sound-absorbing material 8 on the inner wall surface 53 of the exhaust silencing channel 5 and the outer surface of the blocking member, noise is effectively absorbed by the sound-absorbing material 8 as it travels with the gas, thereby further reducing noise.

[0033] Furthermore, such as Figure 4-6As shown, the exhaust silencing channel 5 has an opening 54 on the side that contacts the external vacuum generator 3. The sound-absorbing material 8 extends from the inner wall surface 53 through the opening 54 to the outer wall surface 55 of the exhaust silencing channel 5. In this embodiment, by providing the opening 54, it is beneficial to set up a blocking element in the exhaust silencing channel 5. When the silencing cover is placed on the outside of the vacuum generator 3, the opening 54 is in close contact with the outer wall of the vacuum generator 3. In order to prevent gas and noise from leaking between the opening and the outer wall of the vacuum generator 3, the sound-absorbing material 8 extends from the inner wall surface 53 through the opening 54 to the outer wall surface 55 of the exhaust silencing channel 5. This means that the opening 54 and the outer wall of the vacuum generator 3 are provided with sound-absorbing material 8. On the one hand, this helps to seal the space between the opening 54 and the outer wall of the vacuum generator 3. On the other hand, it helps to absorb the noise that runs between the opening 54 and the outer wall of the vacuum generator 3.

[0034] Furthermore, the exhaust silencing channel 5 has an exhaust port 56 near the exhaust end 52, which communicates with the outside. In this embodiment, the exhaust port 56 is provided to facilitate communication between the exhaust end 52 and the outside.

[0035] Furthermore, both the first longitudinal housing 11 and the second longitudinal housing 13 have a supporting lug 14 at the end away from the first transverse housing 12, and the supporting lug 14 has a connecting through hole 15. In this embodiment, by providing the supporting lug 14 and the connecting through hole 15, it is advantageous to fix the soundproof cover by setting a connector in the connecting through hole 15.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A silencer for a vacuum generator, comprising a housing (1) and a receiving cavity (2), the receiving cavity (2) being used to house an external vacuum generator (3), characterized in that: An exhaust silencing channel (5) is provided inside the housing (1). The exhaust silencing channel (5) includes an inlet end (51) and an outlet end (52). The exhaust silencing channel (5) is connected to the exhaust port (31) of the external vacuum generator (3) near the inlet end (51). The outlet end (52) of the exhaust silencing channel (5) is connected to the outside. The gas discharged from the exhaust port (31) runs along the exhaust silencing channel (5) to the outlet end (52) and is discharged outward. The total length of the gas's running trajectory in the exhaust silencing channel (5) is greater than the total length of the exhaust silencing channel (5) from the inlet end (51) to the outlet end (52).

2. The sound attenuation shroud for a vacuum generator of claim 1, wherein: The exhaust silencing channel (5) is provided with a number of blocking components, which can extend the total length of the gas's running trajectory in the exhaust silencing channel (5).

3. The sound attenuation shroud for a vacuum generator of claim 2, wherein: The blocking component is an arc-shaped baffle (6), and the two sides of the arc-shaped baffle (6) are fixedly connected to the exhaust muffler channel (5). A vent (65) is formed between the top or bottom of each arc-shaped baffle (6) and the exhaust muffler channel (5).

4. The sound attenuation shroud for a vacuum generator of claim 3, wherein: Along the direction extending from the air inlet (51) to the air outlet (52) of the exhaust muffler channel (5), vents (65) formed between the top of the arc-shaped baffle (6) and the exhaust muffler channel (5) and vents (65) formed between the bottom of the arc-shaped baffle (6) and the exhaust muffler channel (5) are alternately arranged.

5. The sound attenuation shroud for a vacuum generator of any of claims 2-4, wherein: The inner wall surface (53) of the exhaust silencing channel (5) and the outer surface of the blocking member are both provided with sound-absorbing material (8).

6. The sound suppression cover for a vacuum generator of claim 5, wherein: The exhaust silencing channel (5) has an opening (54) on the side that contacts the external vacuum generator (3).

7. The sound suppression cover for a vacuum generator of claim 6, wherein: The sound-absorbing material (8) extends from the inner wall surface (53) through the opening (54) to the outer wall surface (55) of the exhaust silencing channel (5).

8. The sound suppression cover for a vacuum generator of claim 1, wherein: The exhaust silencing channel (5) has an exhaust port (56) that communicates with the outside at a position near the exhaust end (52).

9. The sound suppression cover for a vacuum generator of claim 1, wherein: The housing (1) includes a first longitudinal housing (11), a first transverse housing (12) and a second longitudinal housing (13) connected in sequence, the first longitudinal housing (11), the first transverse housing (12) and the second longitudinal housing (13) surrounding to form the accommodating cavity (2).

10. The sound suppression cover for a vacuum generator of claim 9, wherein: Both the first longitudinal shell (11) and the second longitudinal shell (13) have a supporting lug (14) at the end away from the first transverse shell (12), and the supporting lug (14) has a connecting through hole (15).

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