Silencer of pressure-equalizing blow-off valve

Abstract

The utility model discloses a pressure equalizing relief valve silencer which comprises a capacity expansion and pressure reduction chamber, a first sheet type resistive cavity, a second sheet type resistive cavity and a top cover which are sequentially arranged from bottom to top, and the capacity expansion and pressure reduction chamber, the first sheet type resistive cavity, the second sheet type resistive cavity and the top cover are connected through connecting flanges respectively. The first sheet type resistive cavity and the second sheet type resistive cavity are the same in structure, and the second sheet type resistive cavity is perpendicular to the first sheet type resistive cavity. An air inlet is formed in the bottom of the capacity expansion and pressure reduction chamber; an exhaust hole communicated with the second sheet type resistive cavity is formed in the top cover; diffused gas is silenced through the two vertically-arranged sheet type resistive cavities, the silencing effect is guaranteed, meanwhile, the diffused gas is expanded and depressurized through the expansion depressurization chamber, dust in the diffused gas is absorbed through the dust blocking barrel, the dust adsorption speed and quantity of the resistive structures are reduced, and the noise reduction effect is improved. And a poor silencing effect caused by blockage of a resistive structure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of silencers, and particularly relates to a pressure equalizing and discharging valve silencer. Background Art

[0002] The pressure equalizing and discharging valve silencer belongs to a gas evacuation silencer, and it is required to have a high noise reduction volume in the design. Since the gas for pressure equalizing and discharging in the blast furnace contains more dust, the dust removal performance of the silencer is the key to the success or failure of the pressure equalizing and discharging silencer.

[0003] The traditional pressure equalizing and discharging silencer adopts a tubular resistive structure. However, after being used for noise reduction many times, since the dust in the air flow will be absorbed by the tubes and their cylinder walls, the tubes and the cylinder walls will be severely blocked. The operation of cleaning the tubes is relatively complicated and not easy to disassemble and replace, resulting in a reduction in the noise reduction effect. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a pressure equalizing and discharging valve silencer, which can improve the noise reduction effect of the silencer and is convenient for replacing the resistive structure that plays a role in noise reduction.

[0005] To solve the above technical problems, the technical solutions adopted by the utility model are as follows.

[0006] A pressure equalizing and discharging valve silencer includes a pressure reducing and expanding chamber, a first sheet resistive chamber, a second sheet resistive chamber, and a top cover, which are arranged in sequence from bottom to top. Among them, the pressure reducing and expanding chamber, the first sheet resistive chamber, the second sheet resistive chamber, and the top cover are respectively connected by connecting flanges; the first sheet resistive chamber and the second sheet resistive chamber have the same structure, and the second sheet resistive chamber is arranged perpendicular to the first sheet resistive chamber; an air inlet is arranged at the bottom of the pressure reducing and expanding chamber; an exhaust hole communicating with the second sheet resistive chamber is arranged on the top cover.

[0007] For the above pressure equalizing and discharging valve silencer, the pressure reducing and expanding chamber includes a cylindrical barrel body, and a top plate and a bottom plate are respectively arranged at the top and bottom of the barrel body; a dust retaining cylinder is arranged at the center of the bottom of the top plate, and the dust retaining cylinder is installed on the inner wall of the barrel body through a connecting plate arranged in a cross shape; the top plate includes a closed part arranged at the top of the dust retaining cylinder and a punched part arranged on the periphery of the closed part and connected to the inner wall of the barrel body, and a plurality of air permeable holes are arranged on the punched part.

[0008] For the above pressure equalizing and discharging valve silencer, the air permeable holes are respectively arranged uniformly along the circumferential and radial directions of the top plate, and the diameter of the air permeable holes gradually decreases in the centripetal direction along the radial direction.

[0009] For the above pressure equalizing and discharging valve silencer, first inspection holes convenient for maintenance are symmetrically arranged on the barrel body; ash discharge holes convenient for dust removal and ash cleaning are also symmetrically arranged on the bottom plate.

[0010] The above-mentioned equalizing and discharging valve silencer, the first sheet-type resistive cavity includes a resistive cavity chamber, and a number of sound-absorbing sheets are installed inside the resistive cavity chamber at uniform intervals; both ends of the sound-absorbing sheet are installed inside the resistive cavity chamber through arc-shaped mounting brackets detachably installed on the inner wall of the resistive cavity chamber.

[0011] The above-mentioned equalizing and discharging valve silencer, the resistive cavity chamber is symmetrically provided with second inspection holes for easy maintenance.

[0012] The above-mentioned equalizing and discharging valve silencer, a number of lifting lugs for easy installation are respectively arranged on the peripheries of the pressure-reducing and volume-expanding chamber, the first sheet-type resistive cavity, and the second sheet-type resistive cavity.

[0013] Due to the adoption of the above technical solutions, the technical progress obtained by the present utility model is as follows.

[0014] The present utility model provides an equalizing and discharging valve silencer, which silences the discharging gas through two vertically arranged sheet-type resistive cavities, ensuring the silencing effect. At the same time, the pressure of the discharging gas is reduced and the volume is expanded by setting a pressure-reducing and volume-expanding chamber, and a dust-blocking cylinder is also provided to absorb the dust inside the discharging gas, slowing down the speed and quantity of dust adsorbed by the resistive structure, and avoiding poor silencing effect caused by blockage of the resistive structure.

[0015] The present utility model also installs the sound-absorbing sheets in the sheet-type resistive cavity inside the resistive cavity chamber through mounting brackets, enabling the sound-absorbing sheets to be quickly installed and disassembled along the cylinder wall, facilitating the cleaning and replacement of the sound-absorbing sheets. Description of the Drawings

[0016] Figure 1 is the specific structural schematic diagram of the present utility model;

[0017] Figure 2 is the specific structural schematic diagram of the pressure-reducing and volume-expanding chamber of the present utility model;

[0018] Figure 3 is the bottom view of the pressure-reducing and volume-expanding chamber of the present utility model;

[0019] Figure 4 is Figure 3 the sectional view taken along the J-J direction of

[0020] Figure 5 is the specific structural schematic diagram of the sheet-type resistive cavity of the present utility model;

[0021] Figure 6 is the specific structural schematic diagram of the sound-absorbing sheet of the present utility model.

[0022] Wherein: 1. Expansion and pressure reduction chamber, 2. First sheet-type resistive cavity, 3. Second sheet-type resistive cavity, 4. Top cover, 5. First inspection hole, 6. Bottom plate, 7. Ash discharge hole, 8. Top plate, 9. Ash baffle cylinder, 10. Air inlet, 11. Connecting plate, 12. Sealing part, 13. Punched part, 14. Resistive cavity chamber, 15. Second inspection hole, 16. Silencing sheet, 17. Mounting rack, 18. Lifting lug. Detailed implementation manners

[0023] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0024] A pressure equalizing and discharging valve silencer, as Figures 1 to 6 shown, includes an expansion and pressure reduction chamber 1, a first sheet-type resistive cavity 2, a second sheet-type resistive cavity 3, and a top cover 4 arranged in sequence from bottom to top. Among them, the expansion and pressure reduction chamber 1, the first sheet-type resistive cavity 2, the second sheet-type resistive cavity 3, and the top cover 4 are respectively connected by connecting flanges, and an exhaust hole communicating with the second sheet-type resistive cavity 3 is provided on the top cover 4.

[0025] A plurality of lifting lugs 18 convenient for installation are respectively arranged on the circumferences of the expansion and pressure reduction chamber 1, the first sheet-type resistive cavity 2, and the second sheet-type resistive cavity 3.

[0026] The expansion and pressure reduction chamber 1 includes a cylindrical barrel body, a top plate 8 and a bottom plate 6 are respectively arranged at the top and bottom of the barrel body, and a first inspection hole 5 convenient for maintenance is symmetrically arranged on the barrel body.

[0027] An air inlet 10 communicating with the inner cavity of the barrel body is arranged at the center of the bottom plate 6, and ash discharge holes 7 convenient for dust removal and ash cleaning are also symmetrically arranged on the bottom plate 6.

[0028] A dust baffle cylinder 9 is arranged at the center of the bottom of the top plate 8. As Figure 4 shown, the dust baffle cylinder 9 is installed on the inner wall of the barrel body through a connecting plate 11 arranged in a cross shape, and can discharge the dust in the air flow under the action of gravity into the expansion and pressure reduction chamber when the air flow rises, avoiding dust from entering the inside of the sheet-type resistive cavity and causing blockage.

[0029] The top plate 8 includes a sealing part 12 arranged at the top of the dust baffle cylinder 9 and a punched part 13 arranged on the periphery of the sealing part 12 and connected to the inner wall of the barrel body. Ventilation holes are opened on the punched part 13, which is convenient for the air flow to flow into the expansion and pressure reduction chamber 1 through the air inlet and then flow into the sheet-type resistive cavity for silencing.

[0030] The ventilation holes are respectively arranged uniformly along the circumferential and radial directions of the top plate 8, and the diameter of the ventilation holes gradually decreases along the radial centripetal direction.

[0031] The first sheet-type resistive cavity 2 includes a resistive cavity chamber 14, as Figure 5As shown in the figure, second maintenance holes 15 are symmetrically opened on the resistive chamber 14, and a number of sound-absorbing sheets 16 are installed inside the resistive chamber 14 and arranged at uniform intervals.

[0032] Both ends of the sound-absorbing sheet 16 are installed inside the resistive chamber 14 through arc-shaped mounting brackets 17 detachably mounted on the inner wall of the resistive chamber 14, which facilitates removing the sound-absorbing sheet 16 for dust cleaning to avoid excessive dust accumulation affecting the sound-absorbing effect.

[0033] The first sheet-type resistive chamber 2 and the second sheet-type resistive chamber 3 have the same structure, and the second sheet-type resistive chamber 3 is perpendicular to the first sheet-type resistive chamber 2. By arranging the sound-absorbing sheets in different directions, the sound-absorbing effect can be enhanced.

[0034] When the present utility model is in specific use, first, the gas for equalizing pressure and discharging in the blast furnace is sent into the pressure-reducing and volume-expanding chamber 1 from the air inlet 10 for pressure reduction and volume expansion. Then, when the air flow passes through the top plate 8, the air flow will be discharged from the punching part 13 on the outside of the top plate along the air-permeable holes into the first sheet-type resistive chamber 2.

[0035] At the same time, the bottom ash-blocking cylinder 9 will exert a reverse force on the dust in the air flow, so that the dust will remain in the pressure-reducing and volume-expanding chamber 1 under the action of gravity. When the dust accumulates to a certain extent, it can be discharged from the ash-discharging hole 7.

[0036] After the air flow enters the first sheet-type resistive chamber 2, the air flow continuously enters and exits from the small holes on the sound-absorbing sheet 16, thereby causing the air in the pores to vibrate and generate heat by friction, realizing the effective conversion of sound energy into heat energy, so as to achieve the purpose of remarkable sound absorption and noise reduction. At the same time, the sound-absorbing sheet 16 can also absorb the dust in the air flow, and then enter the second sheet-type resistive chamber 3 for sound absorption again, and is discharged from the exhaust port on the top cover 4.

[0037] The present utility model provides an equalizing pressure and discharging valve silencer, which silences the discharging gas through two vertically arranged sheet-type resistive chambers, ensuring the sound-absorbing effect. At the same time, the pressure-reducing and volume-expanding chamber is set to reduce the pressure and expand the volume of the discharging gas, and the ash-blocking cylinder is also set to absorb the dust inside the discharging gas, slowing down the speed and quantity of dust adsorbed by the resistive structure, and avoiding poor sound-absorbing effect caused by blockage of the resistive structure.

[0038] The present utility model also installs the sound-absorbing sheet in the sheet-type resistive chamber inside the resistive chamber through the mounting bracket, so that the sound-absorbing sheet can be quickly installed and disassembled along the cylinder wall, which is convenient for cleaning and replacing the sound-absorbing sheet.

Claims

1. A pressure equalizing relief valve muffler, characterized in that: The invention comprises an expansion and decompression chamber (1), a first sheet-type resistive chamber (2), a second sheet-type resistive chamber (3), and a top cover (4) which are arranged in sequence from bottom to top, wherein the expansion and decompression chamber (1), the first sheet-type resistive chamber (2), the second sheet-type resistive chamber (3), and the top cover (4) are connected via connecting flanges respectively; the first sheet-type resistive chamber (2) and the second sheet-type resistive chamber (3) have the same structure, and the second sheet-type resistive chamber (3) is arranged perpendicular to the first sheet-type resistive chamber (2); an air inlet (10) is arranged at the bottom of the expansion and decompression chamber (1); and an exhaust hole which is connected to the second sheet-type resistive chamber (3) is arranged on the top cover (4).

2. The pressure equalizing and releasing valve muffler according to claim 1, characterized in that: The expansion and pressure reduction chamber (1) comprises a cylindrical body, wherein a top plate (8) and a bottom plate (6) are respectively arranged at the top and bottom of the body; a dust blocking cylinder (9) is arranged at the center of the bottom of the top plate (8), and the dust blocking cylinder (9) is installed on the inner wall of the body through a connecting plate (11) arranged in a cross shape; the top plate (8) comprises a closed portion (12) arranged at the top of the dust blocking cylinder (9) and a punching portion (13) arranged on the periphery of the closed portion (12) and connected to the inner wall of the body, and a plurality of air holes are opened on the punching portion (13).

3. The pressure equalizing relief valve muffler according to claim 2, characterized in that: The air holes are evenly arranged along the circumference and radial direction of the top plate (8), and the diameters of the air holes gradually decrease along the radial centripetal direction.

4. The pressure equalizing and releasing valve muffler according to claim 2, characterized in that: The cylinder body is symmetrically provided with a first inspection hole (5) for easy inspection; the bottom plate (6) is also symmetrically provided with dust discharge holes (7) for easy dust removal and cleaning.

5. The pressure equalizing and releasing valve muffler according to claim 1, characterized in that: The first sheet-type resistive cavity (2) comprises a resistive chamber (14), wherein a plurality of sound-absorbing sheets (16) arranged at even intervals are installed inside the resistive chamber (14); both ends of the sound-absorbing sheets (16) are installed inside the resistive chamber (14) via arc-shaped mounting frames (17) detachably mounted on the inner wall of the resistive chamber (14).

6. The pressure equalizing and releasing valve muffler according to claim 5, characterized in that: The resistive chamber (14) is symmetrically provided with a second inspection hole (15) for easy inspection.

7. The pressure equalizing relief valve muffler according to claim 1, characterized in that: A plurality of lifting ears (18) for facilitating installation are respectively arranged on the peripheral sides of the expansion and pressure reduction chamber (1), the first sheet-type resistive cavity (2) and the second sheet-type resistive cavity (3).

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