CN213574857U - Ventilation and heat dissipation silencer for electric instrument cabinet - Google Patents
Ventilation and heat dissipation silencer for electric instrument cabinet Download PDFInfo
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- CN213574857U CN213574857U CN202022253095.1U CN202022253095U CN213574857U CN 213574857 U CN213574857 U CN 213574857U CN 202022253095 U CN202022253095 U CN 202022253095U CN 213574857 U CN213574857 U CN 213574857U
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Abstract
The utility model relates to an electricity appearance rack ventilation cooling silencer, include: the box-shaped shell is provided with openings at two ends, a plurality of silencing pieces are arranged in the shell, a flange is arranged at a first port of the shell and used for detachably mounting the shell on an electric instrument cabinet, and a clamping groove and a filter screen inserted into the clamping groove are arranged at a second port of the shell; the side wall of the shell comprises an outer plate, glass wool and a pore plate which are sequentially arranged from outside to inside, and the sound-absorbing sheet also comprises an outer plate, glass wool and a pore plate which are sequentially arranged; the utility model discloses the device is when satisfying noise reduction effect, has optimized the aerodynamic performance design, makes its resistance loss fall to minimumly, will fall to minimumly or even can neglect to former radiator fan's heat dissipation influence.
Description
Technical Field
The utility model relates to an electricity appearance rack ventilation cooling silencer belongs to noise elimination equipment field.
Background
The cooling fan is generally installed at the upper portion (air exhaust), the lower portion (air intake) and the top of the cabinet (air exhaust) of the cabinet door of the electric instrument, and the like, and the cooling fan often generates a large amount of noise. To current electric appearance rack radiator fan noise control problem, the scheme of making an uproar of falling commonly used at present has 2: (1) an indoor sound insulation barrier is established to separate the area where the electric instrument cabinet is located from a working area, the electric instrument cabinet is artificially divided into a plurality of compartments such as an equipment room and a working room, and noise is isolated in the equipment room; (2) the simple silencer is arranged at the air outlet of the cooling fan. However, both of these noise reduction schemes have some problems, and the noise reduction scheme (1) has disadvantages: the integrity of the central control room is damaged, the original fireproof partition design is not met, potential safety hazards exist if the central control room is not modified, the fireproof partition design and the indoor air conditioner load design need to be carried out again if the central control room is modified, and large modification and investment can be brought. Disadvantages of scheme (2): the muffler does not perform professional acoustic calculation and aerodynamic performance checking calculation, the noise reduction effect of the muffler is poor, and the quality of an indoor sound environment is not greatly changed; the silencer has poor aerodynamic performance, influences the performance of the cooling fan and shortens the service life of the cooling fan.
SUMMERY OF THE UTILITY MODEL
To the above outstanding problem, the utility model provides an electricity appearance rack ventilation cooling silencer, the device when satisfying noise reduction, has optimized the aerodynamic performance design, makes its resistance loss fall to minimumly, will fall to minimumly to former radiator fan's heat dissipation influence, and simultaneously, the design of silencer satisfies the requirement that current space was patrolled and examined with daily, because of the equal whole dismantlement of silencer, also satisfies requirements such as equipment overhaul.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an electricity appearance rack ventilation heat dissipation silencer, includes following part:
the box-shaped shell is provided with openings at two ends, a plurality of silencing pieces are arranged in the shell, a flange is arranged at a first port of the shell and used for detachably mounting the shell on an electric instrument cabinet, and a clamping groove and a filter screen inserted into the clamping groove are arranged at a second port of the shell; the side wall of the shell comprises an outer plate, glass wool and a pore plate which are sequentially arranged from outside to inside, and the sound-absorbing sheet also comprises an outer plate, glass wool and a pore plate which are sequentially arranged;
cavities are reserved among the silencing pieces, between the silencing pieces and the side wall of the shell and between the silencing pieces and the end face of the flange, and therefore a resonance sound absorption structure is formed inside the silencer.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet preferably further comprises glass wool cloth arranged between the glass wool and the pore plate, wherein the side wall of the shell and the silencing sheet are made of glass wool.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet preferably further comprises a framework, wherein the framework is a galvanized steel plate and is arranged between the outer plate and the glass wool, and the framework is used for enhancing the strength of the side wall of the shell or the silencing sheet.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet is preferably characterized in that a guide plate is arranged at the end part of the silencing sheet, which is in contact with the airflow, and the guide plate is a V-shaped guide plate and used for reducing the resistance of the airflow.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet is preferably further provided with a handle on the filter screen, so that the ventilation and heat dissipation silencer is convenient to detach or install.
The ventilation and heat dissipation silencer of the electric instrument cabinet preferably has the pore plate with the thickness of 0.4-1.2mm, the pore size of 1.5-4.5mm and the perforation rate of 20-40%.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet is preferably characterized in that the aperture of the filter screen is 0.2-0.4mm, and the mesh number is 10-30 meshes.
The ventilation and heat dissipation silencer of the electrical apparatus cabinet preferably comprises an outer plate made of aluminum alloy plate or galvanized steel plate and having a thickness of 0.5-1.5 mm.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the end part of the silencer is provided with a dustproof filter screen slot and a filter screen, so that the daily cleaning operation is convenient;
2. the device of the utility model optimizes the aerodynamic performance design while satisfying the noise reduction effect, so that the resistance loss is minimized, and the heat radiation influence on the original heat radiation fan is minimized or even can be ignored; meanwhile, the connecting flange and the connecting bolt group for the silencer are fixedly connected with the connecting parts such as the cabinet door and the cabinet top plate, the requirements of the existing space on construction and daily inspection are met, and the silencer can be integrally disassembled and the requirements of equipment overhaul and the like are also met.
Drawings
FIG. 1 is a schematic view of the overall structure of the device of the present invention;
FIG. 2 is a schematic view of another angle of the overall structure of the device of the present invention;
FIG. 3 is a schematic view of the structure of the housing sidewall and the silencing plate of the device of the present invention;
the respective symbols in the figure are as follows:
1-an outer plate; 2-a perforated plate; 3-a flange; 4-a flow guide plate; 5-a handle; 6, filtering a screen; 7-glass wool; 8-silencing sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary person in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "first", "second", and the like are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
Example one
As shown in fig. 1 to 3, the present embodiment relates to a ventilation and heat dissipation muffler for an electrical instrument cabinet, which includes the following components:
the box-shaped shell is provided with openings at two ends, a plurality of silencing pieces 8 are arranged in the shell, a flange 3 is arranged at a first port of the shell and used for detachably mounting the shell on an electric instrument cabinet, and a clamping groove and a filter screen 6 inserted into the clamping groove are arranged at a second port of the shell; the side wall of the shell comprises an outer plate 1, glass wool 7 for sound absorption and a pore plate 2 which are sequentially arranged from outside to inside, and the sound-absorbing sheet 8 also comprises the outer plate 1, the glass wool 7 for sound absorption and the pore plate 2 which are sequentially arranged;
cavities are reserved among the plurality of sound-absorbing sheets 8, between the sound-absorbing sheets 8 and the side wall of the shell and between the sound-absorbing sheets 8 and the end face of the flange 3, and therefore a resonance sound-absorbing structure is formed inside the silencer.
In this embodiment, the side wall of the housing and the sound-deadening sheet 8 preferably further include glass wool cloth disposed between the glass wool 7 and the orifice plate 2.
In this embodiment, the side wall of the housing and the sound-absorbing sheet 8 preferably further include a skeleton, which is a galvanized steel sheet, disposed between the outer plate 1 and the glass wool 7 for enhancing the strength of the side wall of the housing or the sound-absorbing sheet 8.
In this embodiment, preferably, the noise reduction sheet 8 is provided with a flow guide plate 4 at an end portion facing the airflow, and the flow guide plate 4 is a V-shaped flow guide plate for reducing resistance of the airflow. More preferably, the deflector is a 1.0mm aluminum alloy plate or a galvanized steel plate.
In this embodiment, preferably, the filter screen 6 is further provided with a handle 5, so as to be convenient to detach or install.
In this embodiment, the thickness of the orifice plate 2 is preferably 0.8mm, the aperture size is 3mm, the perforation rate is 30%, and the surface is sprayed with plastic. The orifice plate 2 is an aluminum alloy perforated plate or a galvanized perforated plate.
In this embodiment, preferably, the aperture of the filter screen 6 is 0.2-0.4mm, and the mesh number is 10-30 mesh.
In the present embodiment, the outer plate 1 is preferably an aluminum alloy plate or a galvanized steel plate, has a thickness of 1.0mm, and has a surface coated with plastic.
In the embodiment, the galvanized steel plate with the framework of 0.8mm is preferably subjected to surface plastic spraying.
In this embodiment, the glass wool 7 is preferably centrifugal glass wool with a volume weight of 32Kg/m3。
In this embodiment, preferably, the clamping groove is made of 1.0mm aluminum alloy plate or galvanized steel plate.
In the embodiment, galvanized angle steel with the diameter of less than 30 multiplied by 3mm is preferably adopted for the flange 3, and the surface is sprayed with plastics.
Example two
The embodiment is based on the first ventilation and heat dissipation silencer of the electrical instrument cabinet provided by the embodiment, and the silencer is installed in a central control room in certain petrochemical industry.
A control room 1 in a certain petrochemical industry is divided into a working area and an equipment area, 10 electric instrument cabinets are arranged in the equipment area, an air outlet and an air inlet are respectively arranged at the upper position and the lower position of each door at the two sides of each electric instrument cabinet, and a cooling fan is installed at the air inlet at the lower side (blast cooling). And (4) mounting silencers at the air inlet and the air outlet simultaneously according to the field actual measurement result and the acoustic calculation. The common sizes (width, height, mm) of the air outlet and the air inlet grid of the cabinet door of the electric instrument are as follows: 150, 255, the design of the silencer needs to be designed according to the parameters (air quantity, wind pressure, power, etc.) of the cooling fan, and the factors such as the size of the air inlet grating, the distance from the air inlet grating to the peripheral edge of the cabinet door, etc. are considered.
The working area and the equipment area of a control room 2 in a certain petrochemical industry are not clearly divided, 9 electric instrument cabinets are arranged indoors, 2 or 4 cooling fans are arranged at the top of each electric instrument cabinet, the top air exhaust mode is adopted, and an air inlet of each electric instrument cabinet is positioned at the lower part of a cabinet door and is in a ventilation grating or fish scale hole plate mode. According to the results of field actual measurement and acoustic calculation, noise reduction measures are not needed to be taken at the lower air inlet, and the ventilation and heat dissipation silencer is needed to be designed and installed at the top heat dissipation air inlet according to factors such as parameters of a heat dissipation fan.
The silencer is respectively arranged at three positions of a lower air inlet, an upper air outlet and a top air outlet of an electric instrument cabinet for noise reduction, and the silencing quantity is more than or equal to 4 dB; resistance loss: and the water level in the water tank is less than 2Pa (flow rate between sheets less than 1m/s), and the heat radiation effect on the heat radiation fan is negligible.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides an electrometer rack ventilation heat dissipation silencer which characterized in that includes following part:
the box-shaped shell is provided with openings at two ends, a plurality of silencing pieces (8) are arranged in the shell, a flange (3) is arranged at a first port of the shell and used for detachably mounting the shell on an electric instrument cabinet, and a clamping groove and a filter screen (6) inserted into the clamping groove are arranged at a second port of the shell; the side wall of the shell comprises an outer plate (1), glass wool (7) for sound absorption and a pore plate (2) which are sequentially arranged from outside to inside, and the silencing sheet (8) also comprises the outer plate (1), the glass wool (7) for sound absorption and the pore plate (2) which are sequentially arranged;
cavities are reserved among the plurality of silencing sheets (8), and between the silencing sheets (8) and the side wall of the shell and the end face of the flange (3), so that a resonance sound absorption structure is formed in the silencer.
2. Electrical cabinet ventilation heat dissipation muffler, according to claim 1, characterized in that the side walls of the casing and the muffling sheet (8) further comprise a glass wool cloth, which is arranged between the glass wool (7) and the orifice plate (2).
3. The ventilation, heat dissipation and noise reduction muffler for electrical equipment cabinets according to claim 1, wherein the side walls of the casing and the noise reduction sheet (8) further comprise a skeleton, which is a galvanized steel sheet, disposed between the outer plate (1) and the glass wool (7) for reinforcing the strength of the side walls of the casing or the noise reduction sheet (8).
4. The ventilation, heat dissipation and noise reduction device of an electrical instrument cabinet as claimed in claim 1, wherein the noise reduction sheet (8) is provided with a guide plate (4) at the end facing the airflow, and the guide plate (4) is a V-shaped guide plate for reducing the resistance of the airflow.
5. The ventilation, heat dissipation and noise reduction device of the electrical instrument cabinet as claimed in claim 1, wherein the filter screen (6) is further provided with a handle (5) for easy detachment or installation.
6. The ventilation and heat dissipation muffler for the cabinet of an electrical instrument as claimed in claim 1, wherein the thickness of the orifice plate (2) is 0.4-1.2mm, the pore size is 1.5-4.5mm, and the perforation rate is 20-40%.
7. The ventilation, heat dissipation and noise reduction device of the electrical instrument cabinet as claimed in claim 1, wherein the aperture of the filter screen (6) is 0.2-0.4mm, and the mesh number is 10-30 meshes.
8. The ventilation, heat dissipation and noise reduction device of electrical apparatus cabinet as claimed in claim 1, wherein the outer plate (1) is an aluminum alloy plate or a galvanized steel plate with a thickness of 0.5-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022253095.1U CN213574857U (en) | 2020-10-12 | 2020-10-12 | Ventilation and heat dissipation silencer for electric instrument cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022253095.1U CN213574857U (en) | 2020-10-12 | 2020-10-12 | Ventilation and heat dissipation silencer for electric instrument cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213574857U true CN213574857U (en) | 2021-06-29 |
Family
ID=76581636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022253095.1U Active CN213574857U (en) | 2020-10-12 | 2020-10-12 | Ventilation and heat dissipation silencer for electric instrument cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213574857U (en) |
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2020
- 2020-10-12 CN CN202022253095.1U patent/CN213574857U/en active Active
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