Silencer of blast furnace gas pressure reducing valve

Abstract

The utility model relates to the technical field of reducing valve silencers, in particular to a blast furnace gas reducing valve silencer. According to the silencer of the blast furnace gas pressure reducing valve, the noise level in the pressure reducing process of blast furnace gas can be remarkably reduced through the dual functions of sound wave absorption of the sound absorption pipe and sound wave scattering of the refraction pipe and the reflection and interference mechanism of the gas outlet end cover, and the noise is efficiently and reliably reduced by combining the physical principles of sound wave absorption, scattering, reflection, interference and the like. According to the utility model, all parts are compact in design, convenient to install and easy to maintain and repair, noise generated in the gas pressure reduction process is reduced, and the environment and personnel health are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valve mufflers, and more specifically to a blast furnace gas pressure reducing valve muffler. Background Art

[0002] With the continuous development of industrial production, blast furnace gas, as an important energy source and chemical raw material, has received more and more attention for its processing and utilization. The blast furnace uses steel plates as the furnace shell, and the shell is lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: furnace throat, furnace body, furnace waist, furnace belly, and furnace hearth. The blast furnace ironmaking technology and economic indicators are good, the process is simple, the production volume is large, the labor productivity is high, and the energy consumption is low.

[0003] During the operation of the blast furnace, it is necessary to inject gas into it for combustion and heating, and use a pressure reducing valve to control the gas injection pressure. The pressure reducing valve group generates airflow noise in the process of adjusting the gas pressure. This noise is usually caused by the sudden pressure reduction and accelerated flow of high-pressure gas when passing through the pressure reducing valve, which endangers the surrounding environment and the hearing health of operators. The airflow noise will also affect the stability and reliability of the blast furnace improvement system.

[0004] Therefore, it is an urgent problem for technical personnel in this field to provide a blast furnace gas pressure reducing valve muffler that is safe and reliable, has excellent noise reduction effect, and reduces blast furnace noise pollution. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a blast furnace gas pressure reducing valve muffler which is easy to install, has excellent sealing and noise reduction performance, and reduces external ash deposition pollution.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include:

[0007] A blast furnace gas pressure reducing valve muffler comprises the following structure:

[0008] case;

[0009] The sound-absorbing tube is sleeved inside the shell to absorb internal sound waves;

[0010] The refraction tube is sleeved on the sound-absorbing tube inside the shell to scatter sound waves;

[0011] The air inlet cover is installed on one side of the shell, connected to the pressure reducing valve group, and fixed to the sound absorbing pipe and the sound absorbing pipe;

[0012] The outlet cover, installed on the other side of the shell, reflects and interferes with the sound waves;

[0013] Install the ring and install the air inlet cover and the air outlet cover on the housing.

[0014] Preferably, the sound-absorbing tube is a cylindrical structure and is hollow inside.

[0015] Preferably, the refraction tube is a cylindrical structure, and a plurality of refraction holes are annularly provided on the refraction tube.

[0016] Preferably, first through holes are formed at upper and lower ends of the shell.

[0017] Preferably, the air inlet end cover and the air outlet end cover are provided with second through holes, the number of which is the same as the number of the first through holes.

[0018] Preferably, the mounting ring mounts the air inlet end cover and the air outlet end cover on the housing by means of bolts, and the bolts pass through the first through hole and the second through hole.

[0019] Preferably, the air inlet end cover is provided with an air inlet, and the air inlet adopts a straight cylindrical structure.

[0020] Preferably, the air outlet end cover is provided with an air outlet, and the air outlet adopts a bent cylindrical structure.

[0021] It can be seen from the above technical scheme that compared with the prior art, the utility model effectively reduces the noise generated during the decompression of blast furnace gas through the synergistic effect of components such as the shell, sound-absorbing tube, refraction tube, air inlet end cover, air outlet end cover and mounting ring. The dual effects of the sound-absorbing tube absorbing sound waves and the refraction tube scattering sound waves, as well as the reflection and interference mechanism of the air outlet end cover, can significantly reduce the noise level during the decompression of blast furnace gas. The air outlet pipe adopts a bent cylindrical structure to reduce the secondary generation and propagation of noise, thereby achieving the goal of efficient noise reduction. The components are compactly designed, easy to install, and easy to maintain and overhaul, thereby reducing the noise generated during the gas decompression process and protecting the environment and personnel health. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the structure of the utility model when viewed from above.

[0025] Figure 3 It is a structural schematic diagram of the sound-absorbing tube of the utility model.

[0026] Figure 4It is a structural schematic diagram of the shell of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the mounting ring of the utility model.

[0028] Figure 6 It is a structural schematic diagram of the refraction tube of the utility model.

[0029] Explanation of the reference numerals: 1-shell, 101-first through hole, 2-mounting ring, 201-bolt, 3-air outlet end cover, 301-air outlet, 4-air inlet end cover, 401-second through hole, 402-air inlet, 5-sound absorbing tube, 6-refracting tube, 601-refracting hole. DETAILED DESCRIPTION

[0030] 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.

[0031] Example

[0032] A blast furnace gas pressure reducing valve muffler, such as Figures 1 to 6 As shown, a blast furnace gas pressure reducing valve muffler includes the following structure:

[0033] Shell 1, supporting and protecting internal components;

[0034] The sound-absorbing tube 5 is sleeved inside the housing 1 to absorb internal sound waves. The sound wave energy in propagation is absorbed and attenuated through its internal hollow structure to reduce noise.

[0035] The refraction tube 6 is sleeved on the sound-absorbing tube 5 inside the housing 1 to scatter sound waves;

[0036] The air inlet cover 4 is installed on one side of the housing 1, connected to the pressure reducing valve group, and fixed to the sound absorbing pipe 5 and the sound absorbing pipe 5;

[0037] The outlet cover 3 is installed on the other side of the housing 1 to reflect and interfere with the sound waves;

[0038] The ring 2 is installed to install the air inlet cover 4 and the air outlet cover 3 on the housing 1.

[0039] In order to further optimize the above solution, the sound-absorbing tube 5 is a cylindrical structure with a hollow interior. The cylindrical structure design enables it to have a large sound-absorbing area and can effectively absorb multi-band noise.

[0040] In order to further optimize the above scheme, the refraction tube 6 is a cylindrical structure, and a plurality of refraction holes 601 are provided in a ring shape on the refraction tube 6. The sound waves are scattered through the refraction holes 601 thereon, thereby reducing the propagation efficiency of the sound waves and achieving the noise reduction effect. The refraction holes 601 provided in a ring shape can scatter the sound waves at multiple angles, reduce the energy of the sound waves propagating in a straight line, and improve the sound elimination efficiency.

[0041] In order to further optimize the above solution, first through holes 101 are provided at the upper and lower ends of the housing 1 .

[0042] In order to further optimize the above solution, the air inlet cover 4 and the air outlet cover 3 are provided with second through holes 401 , the number of which is the same as the number of the first through holes 101 .

[0043] In order to further optimize the above solution, the mounting ring 2 mounts the air inlet cover 4 and the air outlet cover 3 on the housing 1 through bolts 201. The bolts 201 penetrate the first through hole 101 and the second through hole 401 to achieve a fastened connection. The structure is simple and reliable, and it is easy to install and disassemble.

[0044] In order to further optimize the above solution, the air inlet cover 4 is provided with an air inlet 402, and the air inlet 402 adopts a straight cylindrical structure. The straight cylindrical structure of the air inlet 402 is designed to facilitate the smooth entry of gas and reduce the noise generated by the impact of airflow.

[0045] In order to further optimize the above solution, the outlet cover 3 is provided with an outlet 301, and the outlet 301 adopts a bent cylindrical structure to reflect and interfere with sound waves, reduce noise emissions, change the direction of airflow, and interfere with sound waves during propagation.

[0046] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blast furnace gas pressure reducing valve muffler, characterized in that: Included are: Housing (1); A sound-absorbing tube (5) is sleeved inside the housing (1) to absorb internal sound waves; A refraction tube (6) is sleeved on the sound-absorbing tube (5) inside the housing (1) to scatter sound waves; An air intake end cover (4) is installed on one side of the housing (1), connected to the pressure reducing valve group, and fixes the sound absorbing pipe (5) and the sound absorbing pipe (5); An outlet cover (3) is mounted on the other side of the housing (1) to reflect and interfere with sound waves; The mounting ring (2) is used to mount the air inlet cover (4) and the air outlet cover (3) on the housing (1).

2. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The sound-absorbing tube (5) is a cylindrical structure and is hollow inside.

3. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The refraction tube (6) is a cylindrical structure, and a plurality of refraction holes (601) are provided in a ring shape on the refraction tube (6).

4. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The housing (1) is provided with first through holes (101) at the upper and lower ends.

5. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The air inlet end cover (4) and the air outlet end cover (3) are provided with second through holes (401) having the same number as the first through holes (101).

6. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The mounting ring (2) mounts the air inlet end cover (4) and the air outlet end cover (3) on the housing (1) via bolts (201), and the bolts (201) penetrate the first through hole (101) and the second through hole (401).

7. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The air inlet end cover (4) is provided with an air inlet (402), and the air inlet (402) adopts a straight cylindrical structure.

8. A blast furnace gas pressure reducing valve muffler according to claim 1, characterized in that: The gas outlet end cover (3) is provided with a gas outlet (301), and the gas outlet (301) adopts a bent cylindrical structure.

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