Novel Roots vacuum pump exhaust port noise reduction and elimination labyrinth chamber for paper machine net part

Abstract

The utility model discloses a novel Roots vacuum pump exhaust port noise reduction and noise elimination maze chamber for a paper machine net part, which comprises a noise reduction and noise elimination maze chamber main body, maze chamber walls are arranged on the periphery of the noise reduction and noise elimination maze chamber main body, and a noise reduction and noise elimination maze chamber channel is arranged on the outer side of the noise reduction and noise elimination maze chamber main body. The noise-reduction and noise-elimination labyrinth chamber comprises a noise-reduction and noise-elimination labyrinth chamber body, labyrinth chamber walls are built on the two sides of the noise-reduction and noise-elimination labyrinth chamber body, the interior of the noise-reduction and noise-elimination labyrinth chamber body is communicated with a roots vacuum pump exhaust port pipeline, an exhaust outlet is formed in an outlet of the noise-reduction and noise-elimination labyrinth chamber body, and a labyrinth chamber top is built on the tops of the labyrinth chamber walls and the labyrinth chamber walls. The novel Roots vacuum pump exhaust port noise reduction and elimination labyrinth chamber for the paper machine net part is composed of the labyrinth chamber in the middle and the labyrinth chamber channel on the outer ring, the Roots vacuum pump directly discharges gas into the labyrinth chamber, the noise decibel is gradually reduced through sound absorption and noise reduction, and the problem that exhaust noise affects life, work and rest of surrounding residents is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust port noise reduction, in particular to a novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine mesh part. Background Art

[0002] The paper machine mesh refers to an important part of the papermaking machinery. Its function is to evenly distribute the pulp mixed with cellulose and water over the entire width of the paper machine during the papermaking process to form uniform paper. The paper machine mesh gradually removes the water from the pulp by filtering and draining. At the same time, the cellulose particles form a uniform fiber mesh on the mesh, eventually forming the initial structure of the paper. Roots vacuum pumps play a key role in the paper machine mesh. They are mainly used to provide the required vacuum degree to help the paper machine mesh absorb and remove moisture, thereby accelerating the dehydration and solidification process of the pulp.

[0003] The -0.25Mpa Roots vacuum pump exhaust port used in the vacuum box of the existing paper machine mesh section still has exhaust noise as high as 95-100 decibels after the manufacturer's outlet muffler is installed. The excessive noise affects the life, work, and rest of the surrounding residents, and the public reacts strongly and complains continuously. At the same time, the noise also affects the production and life of employees in the factory. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for the mesh section of a paper machine, so as to solve the problem raised in the above-mentioned background technology that the Roots vacuum pump used in the mesh section of a paper machine on the market currently generates noise during exhaust, which has a strong impact on the life, work, and rest of the surrounding residents, and the masses react strongly and complain constantly, and also causes noise impact on the production and life of employees in the factory.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel noise reduction and silencer maze chamber for the exhaust port of a Roots vacuum pump for a papermaking machine mesh section, comprising a noise reduction and silencer maze chamber main body, wherein the noise reduction and silencer maze chamber main body is surrounded by a maze chamber wall, and a noise reduction and silencer maze chamber channel is provided on the outside of the noise reduction and silencer maze chamber main body, and maze channel walls are built on both sides of the noise reduction and silencer maze chamber channel, a Roots vacuum pump exhaust port pipe is connected to the noise reduction and silencer maze chamber main body, and an exhaust outlet is provided at the outlet of the noise reduction and silencer maze chamber channel, and a labyrinth chamber roof is built on the top of the maze chamber wall and the maze channel wall.

[0006] Preferably, the exhaust pipe of the Roots vacuum pump penetrates both the wall of the labyrinth chamber and the wall of the labyrinth passage.

[0007] Preferably, the walls of the maze chamber in the main body of the noise reduction and silencing maze chamber and the top of the maze chamber are both pasted with wave-shaped sound-absorbing cotton, and the maze chamber top is cast by reinforced concrete.

[0008] Preferably, the wall of the labyrinth chamber is provided with an opening structure on a side opposite to the exhaust pipe of the Roots vacuum pump, and a double-layer porous polymer polyethylene silencer is installed at the opening structure of the wall of the labyrinth chamber, and the double-layer porous polymer polyethylene silencer is staggered with the exhaust pipe of the Roots vacuum pump.

[0009] Preferably, the walls of the maze chamber and the maze passage are both built with aerated concrete blocks, and the walls of the maze chamber and the maze passage are connected in sequence.

[0010] Preferably, the noise reduction and sound elimination maze chamber channel is a U-shaped channel structure, and the noise reduction and sound elimination maze chamber channel is connected to the noise reduction and sound elimination maze chamber body through a double-layer porous polymer polyethylene sound-absorbing plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the new Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for the paper machine mesh section is composed of a labyrinth chamber in the middle and a labyrinth chamber channel in the outer circle. The Roots vacuum pump discharges gas directly into the labyrinth chamber, and gradually reduces the noise decibel through sound absorption and noise reduction, solving the problem of exhaust noise affecting the life, work and rest of surrounding residents. The new Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for the paper machine mesh section is constructed of aerated concrete blocks with sound absorption and sound insulation performance, and wave peak sound-absorbing cotton is pasted in the central labyrinth chamber, and the exhaust channel is composed of a double-layer porous polymer polyethylene sound-absorbing board, which effectively eliminates and reduces noise and reduces the decibel of exhaust noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a top view of a new type of Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section according to the utility model;

[0013] Figure 2 This utility model is a new type of Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for paper machine wire section Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 This is a cross-sectional view of a new type of Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section according to the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the structure of a double-layer porous polymer polyethylene silencer board of a new type of noise reduction and silencer labyrinth chamber for a Roots vacuum pump exhaust port used in a paper machine mesh section.

[0016] In the figure: 1. Roots vacuum pump exhaust pipe; 2. Noise reduction and silencing maze chamber body; 3. Maze chamber wall; 4. Double-layer porous polymer polyethylene silencing board; 5. Silencing cotton; 6. Noise reduction and silencing maze chamber passage; 7. Maze passage wall; 8. Exhaust outlet; 9. Maze chamber roof. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4The utility model provides a technical solution: a new type of noise reduction and silencer labyrinth chamber for the exhaust port of a Roots vacuum pump for a papermaking machine mesh section, comprising a noise reduction and silencer labyrinth chamber main body 2, a labyrinth chamber wall 3 is arranged around the noise reduction and silencer labyrinth chamber main body 2, and wave-shaped silencer cotton 5 is pasted on the labyrinth chamber wall 3 in the noise reduction and silencer labyrinth chamber main body 2 and the labyrinth chamber roof 9, and the labyrinth chamber roof 9 is cast by reinforced concrete. This structure can be used for sound absorption and noise reduction by adopting silencer cotton 5. After the silencer cotton 5 is treated by special equipment, a convex and concave waveform is formed on the surface of the sponge, and a small filling and semi-open structure are used to make the sound absorption rate high, absorb a large amount of sound energy, attenuate sound waves, and reduce indoor reflected sound interference and echoes. The labyrinth chamber roof 9 is cast by reinforced concrete to make the overall structure stable, and the silencer cotton 5 is cast by a large The pores and bubbles connected inside and outside the noise reduction and sound elimination chamber can cause the air in the gap to vibrate when the sound wave is incident thereon. Due to the viscous resistance of the air and the friction between the air and the pore wall, a considerable part of the sound energy is converted into heat energy and consumed. A noise reduction and sound elimination maze chamber channel 6 is arranged on the outside of the noise reduction and sound elimination maze chamber main body 2. The noise reduction and sound elimination maze chamber channel 6 is a U-shaped channel structure, and the noise reduction and sound elimination maze chamber channel 6 is connected to the noise reduction and sound elimination maze chamber main body 2 at a double-layer porous polymer polyethylene sound-absorbing plate 4. This structure can increase the noise reduction time of the gas through the noise reduction and sound elimination maze chamber channel 6, and further reduce the noise through the maze channel wall 7. The noise decibel is detected at the exhaust outlet 8. It is determined that the noise can be reduced to 50 decibels, which solves the problem of excessive noise affecting the lives, work and rest of the surrounding residents. The problem of noise is solved, and labyrinth channel walls 7 are built on both sides of the noise reduction and sound elimination maze chamber channel 6. The labyrinth chamber wall 3 and the labyrinth channel wall 7 are both built with aerated concrete blocks, and the labyrinth chamber wall 3 and the labyrinth channel wall 7 are connected in sequence. The internal structure of the aerated concrete blocks of this structure is like bread, with a large number of closed pores evenly distributed, so it has sound absorption and sound insulation properties that general building materials do not have, so that the labyrinth chamber wall 3 and the labyrinth channel wall 7 built by aerated concrete blocks can have the functions of sound absorption and sound insulation, ensuring the exhaust noise reduction effect, the noise reduction and sound elimination maze chamber main body 2 is connected with a Roots vacuum pump exhaust port pipe 1, and the Roots vacuum pump exhaust port pipe 1 is penetrated by the labyrinth chamber wall 3 and the labyrinth channel wall 7. The structure enables the Roots vacuum pump to discharge the gas into the noise reduction and silencing labyrinth chamber main body 2 through the Roots vacuum pump exhaust pipe 1, and the Roots vacuum pump exhaust pipe 1 is pre-buried and fixed through the labyrinth chamber wall 3 and the labyrinth channel wall 7. The labyrinth chamber wall 3 is provided with an opening structure on the side opposite to the Roots vacuum pump exhaust pipe 1, and a double-layer porous polymer polyethylene silencer plate 4 is installed at the opening structure of the labyrinth chamber wall 3, and the double-layer porous polymer polyethylene silencer plate 4 is staggered with the Roots vacuum pump exhaust pipe 1. This structure can utilize the acoustic principle through the double-layer porous polymer polyethylene silencer plate 4 to achieve the effect of noise reduction by changing the propagation mode of sound waves. Since sound waves are mechanical waves, they are generated by the vibration of objects and propagate through the medium.When sound waves enter the double-layer porous polymer polyethylene silencer board 4, reflection, refraction and diffraction phenomena will occur, which will affect the propagation and intensity of the sound waves, thereby realizing the noise reduction function of the double-layer porous polymer polyethylene silencer board 4. The double-layer porous polymer polyethylene silencer board 4 can block the flow of gas and reduce noise, but it does not completely prevent the penetration of gas. Therefore, the double-layer porous polymer polyethylene silencer board 4 can form an air flow pore structure, so that the gas will encounter resistance and diffusion when passing through the double-layer porous polymer polyethylene silencer board 4, which helps to reduce the noise level and realize gas flow processing. The outlet of the noise reduction and silencer maze chamber channel 6 is provided with an exhaust outlet 8, and the top of the maze chamber wall 3 and the maze channel wall 7 is built with a maze chamber roof 9. ,

[0019] Working principle: When using the new Roots vacuum pump exhaust port noise reduction and silencer maze chamber for the mesh section of the papermaking machine, the noise gas discharged from the Roots vacuum pump exhaust port first enters the middle noise reduction and silencer maze chamber body 2 through the Roots vacuum pump exhaust port pipe 1. When the noise gas passes through the double-layer porous polymer polyethylene silencer plate 4, refraction and diffraction phenomena occur, which changes the propagation direction of the sound wave, thereby reducing the intensity of the sound wave and further reducing the noise generation. At the same time, the silencer cotton 5 pasted on the maze chamber wall 3 and the maze chamber top 9 absorbs a large amount of sound energy and attenuates the sound wave through the convex and concave corrugated sponge formed, reducing the interference and echo of indoor reflected sound. The noise gas enters the noise reduction and silencer maze chamber channel 6 from the noise reduction and silencer maze chamber body 2, and then passes through the aerated concrete blocks of the maze channel wall 7 for sound absorption and sound insulation. After that, the noise gas that meets the standard is discharged from the exhaust outlet 8, thereby completing a series of work.

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section, comprising a noise reduction and silencing labyrinth chamber body (2), characterized in that: The noise reduction and noise elimination maze chamber body (2) is surrounded by a maze chamber wall (3), and a noise reduction and noise elimination maze chamber channel (6) is provided on the outside of the noise reduction and noise elimination maze chamber body (2), and maze channel walls (7) are built on both sides of the noise reduction and noise elimination maze chamber channel (6), the noise reduction and noise elimination maze chamber body (2) is connected to a Roots vacuum pump exhaust port pipeline (1), and an exhaust outlet (8) is provided at the outlet of the noise reduction and noise elimination maze chamber channel (6), and a maze chamber roof (9) is built on the top of the maze chamber wall (3) and the maze channel wall (7).

2. According to claim 1, a novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section, characterized in that: The Roots vacuum pump exhaust port pipeline (1) is arranged to penetrate the maze chamber wall (3) and the maze channel wall (7).

3. According to claim 1, a novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section, characterized in that: Wave-shaped sound-absorbing cotton (5) is pasted on the maze chamber wall (3) and the maze chamber roof (9) in the noise reduction and sound-absorbing maze chamber main body (2), and the maze chamber roof (9) is cast by reinforced concrete.

4. A novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section according to claim 1, characterized in that: The labyrinth chamber wall (3) is provided with an opening structure on a side opposite to the Roots vacuum pump exhaust pipe (1), and a double-layer porous polymer polyethylene silencer plate (4) is installed at the opening structure of the labyrinth chamber wall (3), and the double-layer porous polymer polyethylene silencer plate (4) and the Roots vacuum pump exhaust pipe (1) are staggered.

5. According to claim 1, a novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section, characterized in that: The maze chamber wall (3) and the maze passage wall (7) are both built with aerated concrete blocks, and the maze chamber wall (3) and the maze passage wall (7) are connected in sequence.

6. A novel Roots vacuum pump exhaust port noise reduction and silencing labyrinth chamber for a paper machine wire section according to claim 1, characterized in that: The noise reduction and sound elimination maze chamber channel (6) is a U-shaped channel structure, and the noise reduction and sound elimination maze chamber channel (6) is connected to the noise reduction and sound elimination maze chamber body (2) via a double-layer porous high molecular polyethylene sound elimination plate (4).

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