Dust removal pipe and pipeline dust outlet joint place's noise reducer

Abstract

The utility model relates to dust removal pipeline noise reduction technical field, especially the noise reduction muffler of dust removal pipe and pipeline dust outlet joint, including the sound elimination casing and the sound elimination baffle, the sound elimination casing cover is equipped with the dust outlet on the pipeline and is connected with the pipeline, and the dust removal pipe dust suction end passes through the through -hole in the top of sound elimination casing and extends to the dust outlet on the pipeline, and the dust removal pipe dust suction end and the inner wall between the dust outlet limit the air supplement mouth, the sound elimination baffle surrounds in the air supplement mouth, the air supplement mouth and the inside of sound elimination casing intercommunication, and a plurality of layers sound elimination baffle stack in the inside of sound elimination casing, and all are equipped with the air guide hole on every layer sound elimination baffle, and the adjacent air guide hole between adjacent two layers sound elimination baffle is misaligned and is arranged, and the sidewall of sound elimination casing close to the highest layer sound elimination baffle is equipped with the air inlet, to solve the problem of the excessive noise of dust removal pipe and pipeline dust outlet joint.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for dust removal pipelines, and in particular to a noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline. Background Technology

[0002] During the initial processing of tobacco leaves, the torn tobacco leaves still contain other impurities (impurities: tobacco leaf fragments, dust adhering to the surface of the torn tobacco leaves, and hair fragments adhering to the surface of the torn tobacco leaves, etc.). In order to improve the quality of the torn tobacco leaves, a tobacco leaf air separator is usually used to air separate the torn tobacco leaves containing impurities. The air force is used to blow away the impurities in the torn tobacco leaves, thereby indirectly improving the purity of the tobacco leaves.

[0003] In the process of air separation of sheet tobacco leaves, in order to remove impurities generated inside the air separator, two connecting pipes are usually first connected to the dust inlet on the air separator. Then, the other ends of the two connecting pipes are connected to the pipe used to transport impurities. A dust outlet is opened in the middle of the pipe, and a dust removal pipe extends from the dust outlet to connect to the induced draft fan (the discharge end of the induced draft fan is detachably connected to the dust collector bag through the connecting pipe). That is, part of the dust removal pipe's inlet extends into the dust outlet. When dust is removed from the air separator, the induced draft fan is driven. Under the suction of the induced draft fan, the dust in the air separator will enter the dust collector bag for dust removal through the dust inlet, connecting pipe, pipe, dust removal pipe, induced draft fan, and connecting pipe. At the same time, air also enters the dust removal pipe from the air inlet at the connection between the dust outlet and the dust removal pipe's inlet to replenish the dust removal pipe (replenishment air: to avoid the reduction of air volume leading to impurity blockage, thereby improving dust removal efficiency).

[0004] Although the above-mentioned impurity removal structure can discharge impurities generated in the tobacco leaf air separator and collect them in the dust collector bag, the following defects still exist during use: Under the suction of the induced draft fan, impurities or dust transported along the pipeline will occasionally hit the inner wall of the pipeline, generating noise. The make-up air entering the dust collector pipe from the air inlet at the connection between the dust outlet and the dust collector pipe inlet will also generate noise. When the noise generated by the two parts merges at the air inlet at the connection between the dust outlet and the dust collector pipe inlet, the noise will be transmitted to the outside of the pipeline through the air inlet that is connected to the outside, resulting in a large noise at the connection between the dust collector pipe and the pipeline dust outlet.

[0005] Therefore, it is necessary to design a noise reduction structure at the connection between the dust removal pipe and the dust outlet of the pipeline to solve the problem of excessive noise at the connection between the dust removal pipe and the dust outlet of the pipeline. Utility Model Content

[0006] The purpose of this invention is to propose a noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline, so as to solve the problem of excessive noise at the connection between the dust removal pipe and the dust outlet of the pipeline.

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

[0008] The noise reduction silencer at the connection between the dust collection pipe and the dust outlet of the pipeline includes:

[0009] The silencer housing covers the dust outlet on the pipe and is connected to the pipe. The dust collection pipe's suction end passes through the through hole at the top of the silencer housing and extends to the dust outlet on the pipe. The dust collection pipe's suction end and the inner wall of the dust outlet define the air supply port.

[0010] The sound-absorbing baffles surround the air inlet, which is connected to the interior of the sound-absorbing shell. Several layers of sound-absorbing baffles are located inside the sound-absorbing shell. Each layer of sound-absorbing baffles has an air guide hole. The adjacent air guide holes on two adjacent layers of sound-absorbing baffles are staggered. An air inlet is provided on the side wall of the sound-absorbing shell near the highest layer of sound-absorbing baffles.

[0011] Prior to this, each layer of sound-absorbing folding plate is provided with a first set of connecting holes for the dust removal pipe to pass through, and the first set of connecting holes is sleeved with the dust removal pipe.

[0012] Preferably, the bottom of the silencing housing has an open end, which covers the dust outlet on the pipe and is connected to the outer wall of the pipe. The inner wall of the silencing housing, the outer wall of the pipe, and the outer wall of the dust removal pipe together define a placement space for placing several layers of silencing baffles.

[0013] Preferably, several air guide holes are provided along the surface of the sound-absorbing baffle.

[0014] Preferably, a make-up air gap is left between the dust suction end of the dust removal pipe and the inner wall of the dust outlet on the pipe. The make-up air gap is the make-up air opening defined between the dust suction end of the dust removal pipe and the inner wall of the dust outlet.

[0015] Preferably, the upper part of the silencing housing is provided with a dust cover, and the second connecting hole on the dust cover is fixedly connected to the dust removal pipe.

[0016] Preferably, the dust cover and the sound-absorbing housing are made of stainless steel.

[0017] During assembly, first connect the end of the dust removal pipe furthest from the pipeline to the input end of the induced draft fan located at a high position (the output end of the induced draft fan is detachably connected to the dust removal bag via a connecting pipe). Then connect both ends of the pipeline to the dust outlet of the tobacco leaf air separator via connecting pipes. In this way, the noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline is assembled with the induced draft fan and the dust outlet of the tobacco leaf air separator.

[0018] During operation, if dust removal is required inside the tobacco leaf air separator, the induced draft fan is activated. Under the suction of the induced draft fan, the dust inside the tobacco leaf air separator will enter the dust collector bag through the dust inlet, connecting pipe, duct, dust collection pipe, induced draft fan, and connecting pipe. At the same time, the air outside the silencer shell will also enter the silencer shell through the air inlet opened on the side wall of the silencer shell, and then flow along the air guide holes on each layer of sound-absorbing baffles inside the silencer shell to the air supply inlet, and then enter the dust collection pipe through the air supply inlet and dust outlet to supply air to the dust collection pipe; at this time, the dust (ash) is removed from the dust collector. Dust (dust transported in the pipeline) knocks on the pipeline and the noise generated by the air supply entering the dust collection pipe's dust guide end. Then, it is transmitted along the air guide holes on the lowest layer of the sound-absorbing baffle and the air guide holes on each layer of the sound-absorbing baffle to the upper layer of the sound-absorbing baffle. During this process, because the adjacent air guide holes on two adjacent sound-absorbing baffles are staggered, the noise intensity will be consumed by multiple reverberations between the sound-absorbing baffles as it is transmitted from the lowest layer of the sound-absorbing baffle to the highest layer of the sound-absorbing baffle, causing the noise intensity transmitted from the lowest layer of the sound-absorbing baffle to the highest layer of the sound-absorbing baffle to decrease sequentially.

[0019] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0020] This invention utilizes a noise-reducing silencer, composed of a silencer housing and sound-absorbing baffles, to connect the dust collector pipe and the dust outlet. When noise is generated at this connection, it first enters the silencer housing through two air inlets defined between the dust collector pipe's suction end and the dust outlet. The noise then travels sequentially through the air guide holes on the lowest layer of the sound-absorbing baffles and each subsequent layer to the upper layers. During this process, because the adjacent air guide holes on adjacent baffles are staggered, the noise intensity is repeatedly dissipated between the baffles as it travels from the lowest to the highest layer. This results in a gradual decrease in noise intensity from the lowest to the highest layer, thus solving the problem of excessive noise at the connection between the dust collector pipe and the dust outlet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model (without a dust cover).

[0023] Figure 3 This is a schematic diagram of the sound-absorbing folding plate structure in the present invention.

[0024] Figure 4 This is a schematic diagram of the external structure of this utility model.

[0025] In the diagram, 1-silencing shell, 2-pipe, 3-dust outlet, 4-dust removal pipe, 5-through hole, 6-make-up air inlet, 7-silencing baffle, 8-air guide hole, 9-air inlet, 10-first set of connecting holes, 11-second set of connecting holes, 12-stack space, 13-protective cover, 14-make-up air gap. Detailed Implementation

[0026] like Figure 1-4 As shown, to make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Example

[0028] The existing impurity removal structure can discharge impurities generated in the tobacco leaf air separator and collect them in the dust collector bag. However, it still has the following defects during use: under the suction of the induced draft fan, impurities or dust transported along the pipeline will occasionally hit the inner wall of the pipeline and generate noise. The make-up air entering the dust collector pipe from the air inlet at the connection between the dust outlet and the dust inlet end of the dust collector pipe will also generate noise. When the noise generated by the two parts merges at the air inlet at the connection between the dust outlet and the dust inlet end of the dust collector pipe, the noise will be transmitted to the outside of the pipeline through the air inlet that is connected to the outside, resulting in a large noise at the connection between the dust collector pipe and the dust outlet of the pipeline.

[0029] Therefore, it is necessary to design a noise reduction structure at the connection between the dust removal pipe and the dust outlet of the pipeline to solve the problem of excessive noise at the connection between the dust removal pipe and the dust outlet of the pipeline.

[0030] For details, please refer to Figure 1 and Figure 2The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline includes a silencer housing 1 and a sound-absorbing baffle 7. The silencer housing 1 covers the dust outlet 3 on the pipeline 2 and is connected to the pipeline 2. The dust suction end of the dust removal pipe 4 passes through the through hole 5 at the top of the silencer housing 1 and extends to the dust outlet 3 on the pipeline 2. A makeup air port 6 is defined between the dust suction end of the dust removal pipe 4 and the inner wall of the dust outlet 3. That is, a makeup air gap 14 is left between the outer wall of the dust suction end of the dust removal pipe 4 and the inner wall of the dust outlet 3 on the pipeline 2. The makeup air gap 14 can be a rectangular opening. The makeup air gap 14 and the silencer housing 1 Internally interconnected, the air supply gap 14 is the air supply port 6 defined between the outer wall of the dust suction end of the dust removal pipe 4 and the inner wall of the dust outlet 3. The air supply port 6 is interconnected with the interior of the sound-absorbing shell 1. The sound-absorbing baffle 7 is arranged around the air supply port 6. Several layers of sound-absorbing baffle 7 are stacked inside the sound-absorbing shell 1. Each layer of sound-absorbing baffle 7 is provided with an air guide hole 8. The adjacent air guide holes 8 on two adjacent layers of sound-absorbing baffle 7 are staggered. An air inlet 9 is provided on the side wall of the sound-absorbing shell 1 near the highest layer of sound-absorbing baffle 7. At least four air inlets 9 can be provided along the outer side wall of the sound-absorbing shell 1.

[0031] During assembly, first connect the end of the dust removal pipe 4 furthest from the pipe 2 to the input end of the induced draft fan located at a high position (the output end of the induced draft fan is detachably connected to the dust removal bag through a connecting pipe). Then connect both ends of the pipe to the dust outlet of the tobacco leaf air separator through the connecting pipe. In this way, the noise reduction silencer at the junction of the dust removal pipe 4 and the dust outlet 3 of the pipe is assembled with the induced draft fan and the dust outlet of the tobacco leaf air separator.

[0032] In practical applications, if dust removal is required within the tobacco leaf air separator, the induced draft fan is driven. Under the suction of the induced draft fan, the dust within the tobacco leaf air separator will pass through the dust inlet, connecting pipe, duct, dust collection pipe 4, induced draft fan, and connecting pipe into the dust collection bag for dust removal. Simultaneously, air from outside the silencer housing 1 will enter the silencer housing 1 through the air inlet 9 on the side wall of the silencer housing 1, and then flow along the air guide holes 8 on each layer of sound-absorbing baffles 7 inside the silencer housing 1 to the air supply inlet 6. Afterward, it will enter the dust collection pipe 4 through the air supply inlet 6 and the dust outlet 3 to supply air to the dust collection pipe 4. At this time, the dust (dust transported in the duct) knocks against the duct and the air supply... The noise generated by the wind is also transmitted to the sound-absorbing shell 1 through the dust outlet 3 and the air supply outlet 6, and then transmitted to the upper sound-absorbing shell 7 through the air guide holes 8 on the lowest layer sound-absorbing baffle 7 and the air guide holes 8 on each layer of sound-absorbing baffle 7. During this process, since the adjacent air guide holes 8 on the adjacent two sound-absorbing baffles 7 are staggered, the noise intensity will be consumed by repeated reverberation between the sound-absorbing baffles 7 as it is transmitted from the lowest layer sound-absorbing baffle 7 to the highest layer sound-absorbing baffle 7 in the sound-absorbing shell 1. This causes the noise intensity transmitted from the lowest layer sound-absorbing baffle 7 to the highest layer sound-absorbing baffle 7 in the sound-absorbing shell 1 to decrease in sequence, so as to solve the problem of excessive noise at the connection between the dust removal pipe and the dust outlet of the pipeline.

[0033] Please see Figure 2To facilitate the assembly between the dust removal pipe 4 and the sound-absorbing baffle 7, a first set of connecting holes 10 for the dust removal pipe 4 to pass through is provided on each layer of the sound-absorbing baffle 7. The first set of connecting holes 10 on each layer of the sound-absorbing baffle 7 are on the same axis, and the first set of connecting holes 10 are sleeved with the dust removal pipe 4.

[0034] In practical applications, when assembling the dust removal pipe 4 with the sound-absorbing baffle 7 inside the sound-absorbing housing 1, the dust guide end of the dust removal pipe 4 can pass through the through hole 5 at the top of the sound-absorbing housing 1 and slide through the first set of connecting holes 10 on each layer of sound-absorbing baffle 7 to the air supply port 6 defined between the dust suction end of the dust removal pipe 4 and the inner wall of the dust outlet 3. Then, the dust removal pipe 4 is welded to the through hole 5 at the top of the sound-absorbing housing 1 to complete the assembly process between the dust removal pipe 4 and the sound-absorbing baffle 7.

[0035] It should be noted that although the dust guide end of the dust removal pipe 4 slides through the first set of connecting holes 10 on each layer of sound-absorbing fold 7 in sequence, the first set of connecting holes 10 and the dust removal pipe 4 are in sliding contact, that is, there is only a tiny gap between the first set of connecting holes 10 and the dust removal pipe 4.

[0036] Please see Figure 2 The bottom of the silencing housing 1, which is used to place the silencing baffle 7, has an open end. The open end of the bottom of the silencing housing 1 covers the dust outlet 3 opened on the pipe 2 and is connected to the outer wall of the pipe 2. The inner wall of the silencing housing 1, the outer wall of the pipe 2, and the outer wall of the dust removal pipe 4 together define the placement space 12 for placing several layers of silencing baffle 7.

[0037] It should be noted that the open end of the bottom of the silencing housing 1 covers the dust outlet 3 opened on the pipe 2, that is, the dust outlet 3 is covered by the silencing housing 1; the silencing housing 1 is a rectangular cavity with an open bottom; the pipe 2 and the dust removal pipe 4 are both rectangular cavity pipe structures with open ends.

[0038] It should be noted that there are at least 12 layers of sound-absorbing baffles 7, and the 12 layers of sound-absorbing baffles 7 are arranged sequentially from the lowest to the highest position.

[0039] Please see Figure 1 and Figure 3 A number of air guide holes 8 are provided along the surface of the sound-absorbing baffle plate 7 for the purpose of supplying dust outlet 3 to generate noise transmission or for replenishing air. If there are at least 40 air guide holes 8, the arrangement can be at least 10 per row and at least 4 per column. The adjacent air guide holes 8 on each sound-absorbing baffle plate 7 can be equidistant.

[0040] In practical applications, when the dust removal pipe 4 sucks up the dust in the pipe 2 through the dust outlet 3, on the one hand, the air entering through the air inlet 9 on the side wall of the sound-absorbing shell 1 first flows quickly through the 40 air guide holes 8 on each layer of sound-absorbing baffles 7 in the sound-absorbing shell 1 to the air supply port 6, and then flows into the dust removal pipe 4 through the air supply port 6 to replenish the air, thus avoiding the reduction of air volume and the resulting dust or impurities clogging the pipe. On the other hand, the noise generated at the dust outlet 3 will first enter the sound-absorbing shell 1 through the two air supply ports 6, and then be transmitted sequentially to the upper layer sound-absorbing baffles 7 through the 40 air guide holes 8 on each layer of sound-absorbing baffles 7 in the sound-absorbing shell 1. During this process, since the adjacent air guide holes 8 on the adjacent two sound-absorbing baffles 7 are staggered, the noise intensity will be repeatedly consumed between the sound-absorbing baffles as it is transmitted from the bottom layer sound-absorbing baffle 7 to the top layer sound-absorbing baffle 7 in the sound-absorbing shell 1, so that the noise intensity transmitted from the bottom layer sound-absorbing baffle 7 to the top layer sound-absorbing baffle 7 in the sound-absorbing shell 1 will be weakened sequentially.

[0041] It should be noted that the sound-absorbing baffle 7 is a baffle with several continuous crests, and the air guide hole 8 can be opened on the top or side of the crests of the sound-absorbing baffle 7; the sound-absorbing baffle 7 can be made of plastic, and the plastic sound-absorbing baffle 7 has a certain degree of flexibility.

[0042] It should be noted that, in order to ensure that the air entering from the air inlet 9 on the side wall of the silencing housing 1 flows smoothly through the air guide holes 8 on the silencing baffles 7 to the air supply port 6, there is a certain gap between two adjacent silencing baffles 7. As for how to set the gap, each silencing baffle 7 can be connected to the inner wall of the silencing housing 1 at intervals so that there is a certain gap between two adjacent silencing baffles 7. In this way, it can be avoided that when adjacent silencing baffles 7 are tightly stacked together, the air entering from the air inlet 9 on the side wall of the silencing housing 1 cannot smoothly reach the air supply port 6 through several silencing baffles 7.

[0043] Please see Figure 4 To protect the silencing housing 1 from dust, a dust cover 13 is provided on the top of the silencing housing 1. The second connecting hole 11 on the dust cover 13 is fixedly connected to the dust removal pipe 4. That is, the dust cover 13 and the dust removal pipe 4 are fixedly connected. The dust cover 10 has a funnel-shaped outline.

[0044] In practical applications, when dust falls from a high place to a low place, since a dust cover 13 is provided above the sound-absorbing housing 1, the falling dust will preferentially fall on the dust cover 13 and will not fall directly on the sound-absorbing housing 1, thus playing a dust-proof role for the sound-absorbing housing 1.

[0045] It should be noted that, in order to prevent dust falling on the dust cover 13 from sliding down the surface of the dust cover 13 and around the sound-absorbing housing 1, the lowest edge of the funnel-shaped dust cover 13 is turned outward, that is, the lowest edge of the funnel-shaped dust cover 13 has an annular blocking ring (not shown in the figure) to block the sliding dust and prevent the dust from falling directly down the dust cover 13 and around the sound-absorbing housing 1.

[0046] It should be noted that, in order to extend the service life of the dust cover 13 and the sound-absorbing housing 1 or to prevent the dust cover 13 and the sound-absorbing housing 1 from rusting, the material of the dust cover 13 and the sound-absorbing housing 1 is set to stainless steel.

[0047] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A noise reduction silencer at the connection between the dust collector pipe and the dust outlet of the pipeline, characterized in that: include: The silencing housing (1) covers the dust outlet (3) on the pipe (2) and is connected to the pipe (2). The dust suction end of the dust removal pipe (4) passes through the through hole (5) at the top of the silencing housing (1) and extends to the dust outlet (3) on the pipe (2). The dust suction end of the dust removal pipe (4) and the inner wall of the dust outlet (3) define the air supply port (6). The sound-absorbing baffle (7) surrounds the air inlet (6), and the air inlet (6) communicates with the interior of the sound-absorbing shell (1). Several layers of sound-absorbing baffles (7) are located inside the sound-absorbing shell (1). Each layer of sound-absorbing baffle (7) is provided with an air guide hole (8). The adjacent air guide holes (8) on two adjacent layers of sound-absorbing baffles (7) are staggered. An air inlet (9) is provided on the side wall of the sound-absorbing shell (1) near the highest layer of sound-absorbing baffle (7).

2. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 1, characterized in that: Each layer of sound-absorbing folding plate (7) has a first set of connecting holes (10) for the dust removal pipe (4) to pass through, and the first set of connecting holes (10) is sleeved with the dust removal pipe (4).

3. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 1, characterized in that: The bottom of the silencing housing (1) has an open end. The open end of the bottom of the silencing housing (1) covers the dust outlet (3) on the pipe (2) and is connected to the outer wall of the pipe (2). The inner wall of the silencing housing (1), the outer wall of the pipe (2) and the outer wall of the dust removal pipe (4) together define the placement space (12) for placing several layers of sound-absorbing baffles (7).

4. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 1, characterized in that: The air guide hole (8) is provided with several holes along the surface of the sound-absorbing baffle (7).

5. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 1, characterized in that: A make-up air gap (14) is left between the dust suction end of the dust removal pipe (4) and the inner wall of the dust outlet (3) on the pipe (2). The make-up air gap (14) is the make-up air outlet (6) defined between the dust suction end of the dust removal pipe (4) and the inner wall of the dust outlet (3).

6. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 1, characterized in that: The silencing housing (1) is covered with a dust cover (13), and the second connecting hole (11) on the dust cover (13) is fixedly connected to the dust removal pipe (4).

7. The noise reduction silencer at the connection between the dust removal pipe and the dust outlet of the pipeline according to claim 6, characterized in that: The dust cover (13) and the sound-absorbing shell (1) are made of stainless steel.

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