Silencing device for air inlet and air outlet of cooling tower

Abstract

The utility model relates to the field of noise control, in particular to a silencing device for an air inlet and an air outlet of a cooling tower. Comprising a mounting shell, an exhaust outlet is formed in the top of the mounting shell, an exhaust pipe is arranged over the exhaust outlet, the bottom of the exhaust pipe is slidably attached to the top of the mounting shell, foamed aluminum silencers are mounted on the exhaust pipe, the thickness of the foamed aluminum silencers is 20 mm, the interval between the foamed aluminum silencers is 150 mm, a cavity is formed in the mounting shell, and the foamed aluminum silencers are arranged in the cavity. A cavity is formed in the mounting shell, a group of air inlets are formed in the centers of two corresponding side walls of the mounting shell, the two groups of air inlets are communicated with the cavity, a group of composite pinhole aluminum silencing shutters are arranged at one end, far away from the cavity, of each group of air inlets, the width of each group of composite pinhole aluminum silencing shutters is 300mm, the thickness of each V-shaped sound absorber is 20mm, the distance between the V-shaped sound absorbers is 110mm, and the through-flow length is 510mm. According to the embodiment, the noise reduction effect on equipment is achieved, and the influence on the sound environment of building groups around the cooling tower is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of noise control, and particularly relates to a noise elimination device for the air inlet and outlet of a cooling tower. Background Art

[0002] Cooling towers are generally arranged in residential living areas and around offices. The continuous noise output will affect the quality of life and physical and mental health of users, which makes the noise control of cooling towers increasingly taken seriously by people. When the equipment is in working state, the noise of the upper exhaust air outlet fan, the airflow disturbance noise of the side air inlet, the falling water noise, and the mechanical noise of equipment operation such as motors will all have many impacts on the surrounding sound environment. Among them, the airflow disturbance noise at the exhaust air outlet is the largest, the propagation distance is the farthest, and the treatment cost is also the largest. With the continuous improvement of people's living quality, the sensitivity to noise is getting higher and higher.

[0003] After retrieval, in the prior art, the Chinese patent publication number: CN206523073U, the authorization publication date: September 26, 2017, discloses a cooling tower with an automatically opening and closing exhaust air outlet, including a steel support, on which a tower body is installed. The tower body is divided into an upper shell and a lower shell that are welded to each other; the bottom of the lower shell is a chassis; an air inlet window is arranged above the chassis; a filler is also installed inside the lower shell, a water distribution pipe is installed above the filler, and a water collector is arranged above the water distribution pipe; an automatically opening and closing exhaust hood is installed at the top of the upper shell; a fan is also included and installed below the exhaust hood; the exhaust hood includes a fixed fan blade and a movable fan blade with the same shape as the fixed fan blade; a slide rail is arranged at the edge of the exhaust hood; a bearing is fixed in the center of the movable fan blade, a driving motor is installed on any one of the movable fan blades, and the driving motor is provided with rollers that cooperate with the slide rail; first and second travel switches are arranged at both ends of the movable fan blade where the driving motor is installed. The above embodiment improves the service life of the cooling tower.

[0004] However, the device still has the following defects: the above embodiment does not have a noise reduction effect. If noise reduction cannot be carried out, it will lead to problems such as excessive noise values at the air inlet and outlet of the cooling tower and high treatment costs, thus affecting the sound environment of the building group around the cooling tower. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides a noise elimination device for the air inlet and outlet of a cooling tower, including an installation shell. A exhaust air outlet is opened at the top of the installation shell, a exhaust air pipe is arranged directly above the exhaust air outlet, the bottom of the exhaust air pipe is slidably attached to the top of the installation shell, and a foamed aluminum muffler is installed on the exhaust air pipe. The foamed aluminum muffler is 20 mm thick with a spacing of 150 mm.

[0006] A cavity is provided in the installation housing. A set of air inlets are provided at the centers of the two corresponding side walls of the installation housing. Both sets of air inlets communicate with the cavity. A set of composite pinhole aluminum silencing louvers are provided at one end of each set of air inlets away from the cavity. Each set of composite pinhole aluminum silencing louvers has a width of 300 mm, the V-shaped sound-absorbing body has a thickness of 20 mm, the sheet spacing is 110 mm, and the flow-through length is 510 mm.

[0007] Furthermore, the outer plate of each set of composite pinhole aluminum silencing louvers is made of 2.0 mm thick galvanized steel plate, the perforated aluminum plate of the inner plate has a thickness of 1.0 mm, the hole diameter is 2 mm, and the perforation rate is 20%. It is reinforced and assembled through connectors. 100 mm thick 48K hydrophobic glass wool is filled in the middle and wrapped with PVF waterproof and sound-permeable film and professional sound-absorbing fiberglass cloth to prevent the volatilization of glass wool.

[0008] Furthermore, the sound-absorbing body of each set of composite pinhole aluminum silencing louvers is externally covered with a 1.0 mm thick perforated aluminum plate, the hole diameter is 2 mm, and the perforation rate is 20%. It is reinforced through lightweight keels. 48K hydrophobic glass wool is filled in the middle and wrapped with PVF waterproof and sound-permeable film and professional sound-absorbing fiberglass cloth to prevent the volatilization of glass wool.

[0009] Furthermore, two sets of clamping grooves are symmetrically provided at the edges of the two corresponding side walls of the installation housing. Two sets of clamping blocks are symmetrically installed at the edge of one side wall of each set of composite pinhole aluminum silencing louvers close to the installation housing.

[0010] Furthermore, each set of clamping blocks is movably clamped in one of the clamping grooves, and the side wall of each set of composite pinhole aluminum silencing louvers close to the installation housing is slidably attached to the side wall of the installation housing.

[0011] Furthermore, a set of fixing plates are installed at the centers of the bottoms of the two corresponding side walls of the installation housing. A set of first electric sliding tables are embedded at the bottoms of each set of fixing plates. A set of connecting blocks are slidably connected to the output ends of each set of first electric sliding tables. A set of clamps are installed at the bottoms of each set of connecting blocks.

[0012] Furthermore, two sets of mounting plates are symmetrically arranged at both ends of the exhaust pipe. The side walls of the two sets of mounting plates close to the exhaust pipe are installed on the bottom outer wall of the exhaust pipe. The bottom of each set of mounting plates is slidably attached to the top of the installation housing.

[0013] Furthermore, a set of first threaded holes are provided at the centers of the tops of each set of mounting plates. Two sets of second threaded holes are symmetrically provided at the top of the installation housing. A set of screws are provided directly above each set of mounting plates. The output ends of each set of screws penetrate through the first threaded holes and are threadedly connected to the second threaded holes.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. When the device is in use, the foamed aluminum muffler installed on the exhaust duct and the clamping blocks provided at both ends of the installation housing play a noise reduction effect on the device, reducing the impact on the acoustic environment of the building groups around the cooling tower.

[0016] 2. While the first electric sliding table drives the connecting block to move, it also drives the fixture to move. It can be fixed on the cooling tower or separated from the cooling tower. By rotating the screw to withdraw from the second threaded hole and the first threaded hole or threadedly connecting through the first threaded hole into the second threaded hole, moving the clamping block drives the composite pinhole aluminum silencing louvers to withdraw or actively engage into the clamping groove. The operation is simple and the installation is convenient, achieving the effect of saving time and effort.

[0017] Other features and advantages of the present utility model will be described in the subsequent description, and part of them will be obvious from the description or understood by implementing the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the structures pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Shows a schematic structural diagram of the silencing device according to an embodiment of the present utility model;

[0020] Figure 2 Shows a schematic sectional view of the silencing device according to an embodiment of the present utility model;

[0021] Figure 3 Shows a schematic top view of the silencing device according to an embodiment of the present utility model;

[0022] Figure 4 Shows an enlarged view of part A according to an embodiment of the present utility model.

[0023] In the figure: 1. Installation housing; 2. Exhaust duct; 3. Installation plate; 4. First threaded hole; 5. Second threaded hole; 6. Screw; 7. Cavity; 8. Air inlet; 9. Clamping groove; 10. Composite pinhole aluminum silencing louvers; 11. Clamping block; 12. Foamed aluminum muffler; 13. Fixed plate; 14. First electric sliding table; 15. Connecting block; 16. Fixture. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0025] The embodiments of the present utility model provide a noise elimination device for the air inlet and outlet of a cooling tower, including an installation housing 1. Exemplarily, as Figure 1 and Figure 3 shown, a ventilation outlet is provided at the top of the installation housing 1. A ventilation pipe 2 is arranged directly above the ventilation outlet. The bottom of the ventilation pipe 2 is slidably attached to the top of the installation housing 1. Two groups of mounting plates 3 are symmetrically arranged at both ends of the ventilation pipe 2. The side walls of the two groups of mounting plates 3 close to the ventilation pipe 2 are all mounted on the bottom of the outer wall of the ventilation pipe 2. The bottom of each group of mounting plates 3 is slidably attached to the top of the installation housing 1. A set of first threaded holes 4 are provided at the center of the top of each group of mounting plates 3. Two groups of second threaded holes 5 are symmetrically provided at the top of the installation housing 1. A set of screws 6 are arranged directly above each group of mounting plates 3. The output ends of each group of screws 6 penetrate through the first threaded holes 4 and are threadedly connected to the second threaded holes 5. A foamed aluminum muffler 12 is installed on the ventilation pipe 2. The foamed aluminum muffler 12 is 20 mm thick with a spacing of 150 mm.

[0026] Exemplarily, as Figure 1 、 Figure 2 and Figure 4As shown in the figure, a cavity 7 is provided in the installation housing 1. A set of air inlets 8 are provided at the centers of the two opposite side walls of the installation housing 1. The two sets of air inlets 8 are both communicated with the cavity 7. Two sets of clamping grooves 9 are symmetrically provided at the edges of the two opposite side walls of the installation housing 1. A set of composite pinhole aluminum sound-absorbing louvers 10 are provided at one end of each set of air inlets 8 away from the cavity 7. Each set of composite pinhole aluminum sound-absorbing louvers 10 has a width of 300 mm, the V-shaped sound-absorbing body has a thickness of 20 mm, the sheet spacing is 110 mm, and the flow-through length is 510 mm. The outer plate of each set of composite pinhole aluminum sound-absorbing louvers 10 is made of a 2.0-mm-thick galvanized sheet, the perforated aluminum plate of the inner plate has a thickness of 1.0 mm, the aperture is 2 mm, and the perforation rate is 20%. They are reinforced and assembled through connecting parts such as screw angles. 100-mm-thick 48K hydrophobic glass wool is filled in the middle and wrapped with PVF waterproof and sound-permeable thin film and professional sound-absorbing fiberglass cloth to prevent the volatilization of glass wool. The sound-absorbing body of each set of composite pinhole aluminum sound-absorbing louvers 10 has an outer perforated aluminum plate with a thickness of 1.0 mm, an aperture of 2 mm, and a perforation rate of 20%. It is reinforced by a light keel, filled with 48K hydrophobic glass wool in the middle, and wrapped with PVF waterproof and sound-permeable thin film and professional sound-absorbing fiberglass cloth to prevent the volatilization of glass wool. Two sets of clamping blocks 11 are symmetrically installed at the edge of one side wall of each set of composite pinhole aluminum sound-absorbing louvers 10 close to the installation housing 1. Each set of clamping blocks 11 is movably clamped in one of the clamping grooves 9. One side wall of each set of composite pinhole aluminum sound-absorbing louvers 10 close to the installation housing 1 is slidably attached to one side wall of the installation housing 1. A set of fixing plates 13 are installed at the centers of the bottoms of the two opposite side walls of the installation housing 1. A set of first electric sliding tables 14 are embedded at the bottoms of each set of fixing plates 13. A connecting block 15 is slidably connected to the output end of each set of first electric sliding tables 14. A set of clamps 16 are installed at the bottoms of each set of connecting blocks 15.

[0027] Working principle: While the first electric sliding table 14 drives the connecting block 15 to move, it also drives the clamp 16 to move, which can be fixed on the cooling tower or separated from the cooling tower. By turning the screw 6 to pull out of the second threaded hole 5 and the first threaded hole 4, the exhaust duct 2 is moved, and the exhaust duct 2 is disassembled from the installation housing 1. The exhaust duct 2 is attached to the center of the top of the installation housing 1. The screw 6 is rotated to penetrate through the first threaded hole 4 and is threadedly connected to the second threaded hole 5, and the installation is completed. Moving the composite pinhole aluminum sound-absorbing louvers 10 drives the clamping block 11 to pull out of the clamping groove 9, and the composite pinhole aluminum sound-absorbing louvers 10 are separated from the installation housing 1. Moving the composite pinhole aluminum sound-absorbing louvers 10 drives the clamping block 11 to be movably clamped into the clamping groove 9, and the installation is completed. When the equipment is in use, the foamed aluminum muffler 12 installed on the exhaust duct 2 and the composite pinhole aluminum sound-absorbing louvers 10 provided at both ends of the installation housing 1 play a noise reduction effect on the equipment.

[0028] During the use of the device, the foamed aluminum muffler 12 installed on the exhaust duct 2 and the composite pinhole aluminum sound-absorbing louvers 10 provided at both ends of the installation housing 1 have a noise reduction effect on the device and reduce the impact on the acoustic environment of the building groups around the cooling tower.

[0029] While the first electric slide table 14 drives the connecting block 15 to move, it also drives the fixture 16 to move. It can be fixed on the cooling tower or separated from the cooling tower. By turning the screw 6, it can be withdrawn from the second threaded hole 5 and the first threaded hole 4 or threaded through the first threaded hole 4 and connected into the second threaded hole 5. Moving the composite pinhole aluminum sound-absorbing louver 10 drives the clamping block 11 to be withdrawn or movably clamped into the clamping groove 9. The operation is simple and the installation is convenient, achieving the effect of saving time and effort.

[0030] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A cooling tower air inlet and outlet silencer, comprising a mounting housing (1), characterized in that: An exhaust port is provided on the top of the installation shell (1); an exhaust pipe (2) is provided directly above the exhaust port; the bottom of the exhaust pipe (2) is slidably fitted on the top of the installation shell (1); a foamed aluminum muffler (12) is installed on the exhaust pipe (2); the foamed aluminum muffler (12) is 20 mm thick and has a spacing of 150 mm; A cavity (7) is provided in the installation shell (1), and a group of air inlets (8) are provided at the centers of the two corresponding side walls of the installation shell (1), and the two groups of air inlets (8) are both connected to the cavity (7), and a group of composite pinhole aluminum sound-absorbing louvers (10) are provided at one end of each group of air inlets (8) away from the cavity (7), and each group of composite pinhole aluminum sound-absorbing louvers (10) is 300 mm wide, the V-shaped sound-absorbing body sheet is 20 mm thick, the sheet spacing is 110 mm, and the flow length is 510 mm.

2. The cooling tower air inlet and outlet silencer according to claim 1, characterized in that: The outer plate of each group of the composite pinhole aluminum sound-absorbing louvers (10) is made of 2.0 mm thick galvanized plate, the inner plate is a perforated aluminum plate with a thickness of 1.0 mm, a hole diameter of 2 mm, and a perforation rate of 20%. It is reinforced and assembled through connectors, filled with 100 mm thick 48K hydrophobic glass wool in the middle, and wrapped with PVF waterproof and sound-permeable film and professional sound-absorbing glass cloth to prevent the glass wool from volatilizing.

3. The cooling tower air inlet and outlet silencer according to claim 2, characterized in that: The sound absorbing body of each group of the composite pinhole aluminum sound-absorbing louvers (10) is an externally applied perforated aluminum plate with a thickness of 1.0mm, pore diameter is 2mm, perforation rate is 20%, it is reinforced by lightweight keel, filled with 48K hydrophobic glass wool in the middle, and wrapped with PVF waterproof and sound-permeable film and professional sound-absorbing glass cloth to prevent the volatilization of glass wool.

4. The cooling tower air inlet and outlet silencer according to claim 1, characterized in that: Two groups of snap-in grooves (9) are symmetrically provided at the edges of the two corresponding side walls of the installation shell (1), and two groups of snap-in blocks (11) are symmetrically installed at the edge of one side wall of each group of the composite pinhole aluminum sound-absorbing louvers (10) close to the installation shell (1).

5. The cooling tower air inlet and outlet silencer according to claim 4, characterized in that: Each group of the clamping blocks (11) is movably clamped in one group of the clamping slots (9), and each group of the composite pinhole aluminum sound-absorbing louvers (10) is slidably fitted on a side wall of the mounting shell (1) close to the side wall of the mounting shell (1).

6. The cooling tower air inlet and outlet silencer according to claim 1, characterized in that: A set of fixing plates (13) are installed at the bottom center of the two side walls corresponding to the installation shell (1), a set of first electric slides (14) are embedded in the bottom of each set of fixing plates (13), a set of connecting blocks (15) are slidably connected to the output end of each set of the first electric slides (14), and a set of clamps (16) are installed at the bottom of each set of the connecting blocks (15).

7. The cooling tower air inlet and outlet silencer according to claim 1, characterized in that: Two groups of mounting plates (3) are symmetrically arranged at both ends of the exhaust duct (2); one side wall of the two groups of mounting plates (3) close to the exhaust duct (2) is mounted on the bottom of the outer wall of the exhaust duct (2); and the bottom of each group of mounting plates (3) is slidably fitted on the top of the mounting shell (1).

8. The cooling tower air inlet and outlet silencer according to claim 7, characterized in that: A group of first threaded holes (4) is provided at the center of the top of each group of the mounting plates (3), two groups of second threaded holes (5) are symmetrically provided at the top of the mounting shell (1), and a group of screws (6) is provided directly above each group of the mounting plates (3), and the output ends of each group of the screws (6) pass through the first threaded holes (4) and are then threadedly connected to the second threaded holes (5).

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