Functional sectional noise reduction ventilation system for power facilities and control method

Abstract

The application discloses a functional section type noise reduction ventilation system for power facilities and a control method, and belongs to the technical field of power facility noise reduction ventilation, and the system comprises a strong exhaust ventilation section, a sound absorption noise reduction section and a direction adjustment section; wherein the strong exhaust ventilation section is connected with a ventilation opening of a main transformer room; the strong exhaust ventilation section comprises a turbine fan, an execution motor and a strong exhaust ventilation baffle, the turbine fan is arranged at the ventilation opening of the main transformer room, the execution motor is arranged at the inner side of the strong exhaust ventilation baffle, and the execution motor can control the strong exhaust ventilation baffle to be opened; the sound absorption noise reduction section is internally fixed with a local square hole shaped silica rubber micro-perforated sound absorption plate; the direction adjustment section comprises an extension section, a direction adjustment structure and an air outlet, is used for adapting to the height of the main transformer room, and adjusting the direction of the air outlet of the noise reduction ventilation system. The application solves the problems of turbine fan and main transformer noise control and rapid ventilation and smoke exhaust during high temperature and large load in summer of a transformer substation by arranging different functional sections.

Description

Technical Field

[0001] This invention belongs to the field of noise reduction and ventilation technology for power facilities, specifically, it relates to a functional zone noise reduction and ventilation system and control method for power facilities. Background Technology

[0002] Currently, power facilities generally suffer from problems such as high noise levels and poor ventilation. Taking indoor substations as an example, these substations are widely used in modern urban power systems. However, due to their small internal space and enclosed environment, ventilation and heat dissipation are poor, preventing the effective dissipation of Joule heat generated by the main transformers inside. Especially during the high temperatures of summer, when residential electricity loads are high, transformer overheating becomes even more severe, leading to problems such as increased transformer oil temperature, accelerated aging of insulation materials, and shortened transformer lifespan, even threatening the operational safety of the power grid. Currently, these problems are generally addressed by installing ventilation windows with turbine fans. However, due to the high speed of these fans and the noise pollution generated by the transformers during operation, noise levels at the power facility boundary exceed standards, affecting the daily lives of nearby residents. Furthermore, in the event of a fire in the electrical equipment inside the main transformer room, the existing ventilation ducts are insufficient to respond promptly.

[0003] Existing technical document 1 (CN205846547U) discloses a noise reduction and intelligent ventilation system for the main transformer room of a 110kV indoor substation. The fan room is located on the top of the main transformer room and is equipped with a fan, a linkage valve, and ventilation ducts. An underground ventilation shaft is set at the entrance to form a ventilation system. Temperature detectors and temperature control boxes form a temperature control system for the main transformer room. Impedance silencers, static pressure boxes, double-layer sound-absorbing wall panels, pressure relief walls, and sound-absorbing and rain-proof louvers constitute a noise reduction system. However, this prior art (1) only achieves temperature control. (1) When a fire hazard or open flame occurs in the equipment inside the main transformer room, the detection cannot effectively detect the indoor smoke content and oxygen content, and cannot be linked with the fire extinguishing device to extinguish the fire; (2) The ventilation path length involved in the technology of this patent is fixed, and it is impossible to shorten the ventilation path to improve ventilation efficiency under special conditions such as abnormal high temperature or smoke; (3) The noise reduction system composed of the impedance silencer, static pressure box and other devices in the patent technology does not combine the acoustic characteristics of the main transformer body, main transformer fan and turbine fan to carry out targeted noise reduction effect improvement design.

[0004] Prior art document 2 (CN207728052U) discloses a ventilation and noise reduction channel for an indoor substation, which has indoor and outdoor ventilation openings and a noise reduction system. However, this prior art is essentially the application of Active Noise Control (ANC) technology in the air duct. According to the principle of ANC technology, this technology can only achieve noise control at the location of the error sensor. Moreover, since the secondary sound source itself provides additional sound wave energy injection, there may be an increase in noise level outside the ventilation opening due to sound wave superposition, thus failing to achieve noise control in a wider area outside the ventilation opening.

[0005] Therefore, there is an urgent need for a device that can simultaneously solve the problems of cooling, ventilation and noise reduction, and achieve efficient forced ventilation and fire extinguishing under fire hazard or fire conditions. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a functional zone noise reduction and ventilation system and control method for power facilities that can simultaneously solve the problems of cooling, ventilation, and noise reduction.

[0007] The present invention adopts the following technical solution.

[0008] The first aspect of the present invention provides a functional zone-type noise reduction ventilation system for power facilities, comprising: a forced exhaust ventilation zone, a sound absorption and noise reduction zone, and an orientation adjustment zone; the forced exhaust ventilation zone, the sound absorption and noise reduction zone, and the orientation adjustment zone are connected sequentially from bottom to top by sound-insulating sealing rubber, wherein the forced exhaust ventilation zone is connected to the ventilation opening of the main transformer room, and each zone is fixed to the outer wall of the main transformer room by a fastening support structure;

[0009] The forced ventilation section includes: a turbine fan, an actuator motor, and a forced ventilation damper. The turbine fan is located at the ventilation opening of the main transformer room, and the actuator motor is located inside the forced ventilation damper. The actuator motor can control the forced ventilation damper to open for forced ventilation and smoke extraction.

[0010] The sound-absorbing and noise-reducing section is equipped with locally square-hole silicone rubber micro-perforated sound-absorbing panels for absorbing noise.

[0011] The orientation adjustment section includes an extension section, an orientation adjustment structure, and an air outlet, used to adapt to the height of the main transformer room and adjust the orientation of the air outlet of the noise reduction ventilation system.

[0012] Preferably, the forced ventilation section further includes: an oxygen content sensor, a temperature sensor, a smoke sensor, and a foam fire extinguishing device. The oxygen content sensor, temperature sensor, smoke sensor, and foam fire extinguishing device are linked together for detecting and extinguishing fires in the main transformer room.

[0013] Preferably, the forced ventilation section further includes a pull ring, which is located on the outside of the forced ventilation baffle and is used by maintenance personnel to manually pull open the baffle with an insulated operating rod to ensure ventilation and smoke extraction when the actuator or its control system is damaged.

[0014] Preferably, the partially perforated silicone rubber sound-absorbing panel includes two types, A and B. Type A is a partially perforated silicone rubber sound-absorbing panel with square holes set at the right angle of the sound-absorbing panel, and Type B is a partially perforated silicone rubber sound-absorbing panel with square holes set in the middle of one side of the sound-absorbing panel.

[0015] Preferably, the A and B type partially square-hole silicone rubber micro-perforated sound-absorbing panels are installed with unequal spacing between them, and are staggered and rotated within the sound absorption and noise reduction section to form a spiral square-hole channel for ventilation.

[0016] Preferably, the length of the extension section can be adjusted according to the different heights of the main transformer room to adapt to the height of the main transformer room.

[0017] Preferably, the orientation adjustment structure is a retractable structure made of sound-insulating and sealing rubber material, used to adjust the orientation of the air outlet of the noise reduction duct system.

[0018] Preferably, the air outlet has an angled cut design to prevent rainwater from entering the noise reduction duct.

[0019] Preferably, the outer walls of each section of the noise reduction ventilation system are made of rust-resistant sound insulation material, and each section is fixed to the outer wall of the main structure of the power facility by expansion bolts.

[0020] A second aspect of the present invention provides a control method for a functional zone noise reduction ventilation system for power facilities, comprising the following steps:

[0021] The temperature sensor installed in the noise reduction ventilation system performs periodic detection. When the temperature sensor's detection result does not exceed the set threshold, the temperature sensor continues to perform periodic detection; when the temperature sensor's detection result exceeds the set threshold, the smoke sensor is activated.

[0022] When the smoke sensor detects a value that does not exceed the set threshold, the fan operates at low or medium speed.

[0023] When the smoke sensor detects a value exceeding a set threshold, the fan runs at high speed, the foam extinguishing system is activated, the forced ventilation damper pops open, and the oxygen sensor is activated to detect the smoke.

[0024] When the oxygen content sensor detects that the requirements for personnel entry are met, the temperature sensor continues to perform periodic checks.

[0025] When the oxygen content sensor reading does not meet the requirements for personnel entry, the fan continues to run at high speed until the oxygen content sensor reading meets the requirements for personnel entry.

[0026] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0027] This application solves the problems of controlling the noise of turbine fans and main transformers and rapid ventilation and smoke extraction when using turbine fans to control the temperature of the main transformer room during the high temperature and heavy load period in summer in substations by setting different functional sections.

[0028] When the temperature inside the main transformer room is too high but there is no fire, this application achieves low noise and efficient ventilation and heat dissipation in the main transformer room. The sound absorption and noise reduction section effectively absorbs the high-amplitude frequency components of transformer body noise, transformer accessory fan noise and turbine fan noise by setting the porosity of silicone rubber micro-perforated sound-absorbing panels, the thickness of the micro-perforated sound-absorbing panels, and the position and distance of the sound-absorbing panels. The orientation adjustment section allows for arbitrary adjustment of the air outlet orientation to avoid the side of the plant boundary with a higher risk of exceeding the noise standard, thereby reducing the risk of the plant boundary noise level exceeding the standard.

[0029] When a fire hazard or fire occurs in the main transformer room, the forced ventilation section, through the combination of sensors, can automatically control detection, link with fire suppression, and open forced ventilation dampers to shorten the ventilation path for forced ventilation. It can also link with foam sprinkler fire suppression systems for spray fire suppression. After the fire hazard is eliminated, the smoke and oxygen content in the main transformer room can be continuously monitored, providing life support data for firefighters and maintenance personnel entering the premises. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the noise reduction and ventilation system;

[0031] Figure 2 This is a structural diagram of the forced exhaust ventilation section (including sensors and spray devices);

[0032] Figure 3 These are the side view (left) and top view (right) of the spiral square hole channel in the sound absorption and noise reduction section;

[0033] Figure 4 These are top and side views (left) of a type A partially square-hole silicone rubber micro-perforated sound-absorbing panel and a type B partially square-hole silicone rubber micro-perforated sound-absorbing panel (right) in the sound absorption and noise reduction section.

[0034] Figure 5 This is a schematic diagram of the orientation adjustment section structure;

[0035] Figure 6 This is a top view showing the effect of the orientation adjustment;

[0036] Figure 7 This is the control logic flowchart for the forced exhaust ventilation section;

[0037] In the diagram: 1. Main transformer room; 2. Forced exhaust ventilation section; 21. Oxygen sensor; 22. Temperature sensor; 23. Smoke sensor; 24. Foam fire sprinkler system; 25. Turbine fan; 26. Actuator motor; 27. Forced exhaust ventilation baffle; 28. Pull ring; 3. Sound absorption and noise reduction section; 31. Partially square-hole silicone rubber micro-perforated sound-absorbing panel; 4. Orientation adjustment section; 41. Sound insulation rubber; 42. Extension section; 43. Orientation adjustment structure; 44. Air outlet; 5. Fastening support structure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0039] like Figure 1 As shown, Embodiment 1 of the present invention provides a functional zone noise reduction ventilation system for power facilities, including a forced exhaust ventilation zone 2, a sound absorption and noise reduction zone 3, and an orientation adjustment zone 4.

[0040] The forced ventilation section 2, the sound absorption and noise reduction section 3, and the orientation adjustment section 4 are connected sequentially from bottom to top by sound insulation rubber 41. The forced ventilation section 2 is connected to the ventilation opening of the main transformer room 1, and each section is fixed to the outer wall of the main transformer room 1 by a fastening support structure 5.

[0041] like Figure 2 As shown, the forced ventilation section 2 is equipped with an oxygen content sensor 21, a temperature sensor 22, a smoke sensor 23, and a foam fire extinguishing sprinkler device 24. The oxygen content sensor 21, temperature sensor 22, smoke sensor 23 and foam fire extinguishing sprinkler device 24 are linked together for the detection and fire extinguishing of the substation.

[0042] The forced ventilation section 2 also includes a turbine fan 25, an actuator motor 26, a forced ventilation baffle 27, and a pull ring 28. The turbine fan 25 is located at the ventilation opening of the main transformer room 1, and the actuator motor 26 is located inside the forced ventilation baffle 27. In case of fire, according to the control logic, the actuator motor 26 can control the forced ventilation baffle 27 to pop open to ensure the forced ventilation and smoke extraction effect.

[0043] In a preferred but non-limiting embodiment of the present invention, the pull ring 28 is disposed on the outside of the forced ventilation baffle 27 so that when the actuator 26 or its control system is damaged, the maintenance personnel can manually pull open the baffle with the aid of an insulated operating rod to ensure the ventilation and smoke extraction effect.

[0044] like Figure 3 , 4 As shown, a partially perforated silicone rubber sound-absorbing panel 31 with square holes is fixed inside the sound-absorbing and noise-reducing section 3. The micro-perforated structure is used to ensure the sound absorption effect. The partially perforated silicone rubber sound-absorbing panel 31 includes two types, A and B. Type A has square holes set at the right angle of the sound-absorbing panel, and type B has square holes set in the middle of one side of the sound-absorbing panel.

[0045] In a preferred but non-limiting embodiment of the present invention, a total of 8 blocks of types A and B are installed in a staggered and rotating manner within the sound absorption and noise reduction section 3. These blocks have different porosities in their micro-perforated structures and unequal spacing between them, forming a spiral square-hole channel for ventilation. This creates a noise reduction cavity and simultaneously ensures that the peak frequency of acoustic transmission loss coincides with or is close to the high-amplitude frequency bands in the noise spectra of the transformer body, transformer accessory fan, and turbine fan. This achieves priority and effective absorption of the high-amplitude frequency components of the three types of noise. Specifically, the high-decibel frequency bands with large amplitudes in the sound spectrum are absorbed first, addressing the main issues and eliminating the main sound sources. The remaining frequency components with smaller amplitudes are significantly reduced by the time they reach the factory boundary due to natural air attenuation and adjustments to the direction of the air duct outlet (avoiding the factory boundary where the risk of exceeding the standard is high). This satisfies the factory boundary noise standard limit (GB 12348).

[0046] It is worth noting that the applicant of this invention noticed that the unequal spacing design is related to the absorption of sound at different frequencies. Therefore, a series of special acoustic designs were carried out to make the peak frequency of acoustic transmission loss coincide with or be close to the frequency band with larger amplitude in the spectrum of transformer body noise, transformer accessory fan noise, and turbine fan noise. In particular, regarding the distance between the plates, if the design is equidistant, it is equivalent to losing one adjustment parameter, and the dynamic adjustment range will be smaller. The design of 8 plates is firstly to construct a more suitable sound-absorbing cavity structure, and secondly, with a fixed total thickness, the thickness of a single micro-perforated plate can be reduced, thereby reducing the load on the individual structure and improving durability.

[0047] like Figure 5As shown, the orientation adjustment section 4 includes an extension section 42, an orientation adjustment structure 43, and an air outlet 44. The extension section 42 can be adjusted in length according to the height of the main transformer room 1 to adapt to the height of the main transformer room. The orientation adjustment structure 43 is a retractable structure made of sound-insulating and sealing rubber, which facilitates the adjustment of the air outlet orientation of the noise reduction duct system to avoid facing sensitive points outside the specific side of the plant boundary or the side of the plant boundary with a higher risk of exceeding the standard, thereby reducing the risk of the plant boundary noise level exceeding the standard. The orientation adjustment effect is as follows: Figure 6 As shown.

[0048] The air outlet 44 has an angled cut design, with the upper side longer than the lower side, which can prevent rainwater from entering the noise reduction air duct.

[0049] In a preferred but non-limiting embodiment of the present invention, the outer walls of each section of the noise reduction ventilation system are made of rust-resistant and sound-insulating materials such as hot-dip galvanized steel plates or stainless steel plates, and each section is fixed to the outer wall of the main structure of the power facility by expansion bolts.

[0050] The above is an example of a noise reduction ventilation system used in substations; it can also be applied to power facilities such as generators and transformers. Figure 7 As shown, Embodiment 2 of the present invention discloses a control method for a functional zone noise reduction ventilation system for power facilities, comprising the following steps:

[0051] The temperature sensor installed in the noise reduction ventilation system performs periodic detection. When the temperature sensor's detection result does not exceed the set threshold, the temperature sensor continues to perform periodic detection; when the temperature sensor's detection result exceeds the set threshold, the smoke sensor is activated.

[0052] When the smoke sensor detects a value that does not exceed the set threshold, the fan operates at low or medium speed.

[0053] When the smoke sensor detects a value exceeding a set threshold, the fan operates at high speed, the foam extinguishing system is activated, the forced ventilation damper pops open, and the oxygen sensor is activated to detect the smoke.

[0054] When the oxygen content sensor detects that the requirements for personnel entry are met, the temperature sensor continues to perform periodic checks.

[0055] When the oxygen content sensor reading does not meet the requirements for personnel entry, the fan continues to run at high speed until the oxygen content sensor reading meets the requirements for personnel entry.

[0056] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0057] This application solves the problems of controlling the noise of turbine fans and main transformers and rapid ventilation and smoke extraction when using turbine fans to control the temperature of the main transformer room during the high temperature and heavy load period in summer in substations by setting different functional sections.

[0058] When the temperature inside the main transformer room is too high but there is no fire, this application achieves low noise and efficient ventilation and heat dissipation in the main transformer room. The sound absorption and noise reduction section effectively absorbs the high-amplitude frequency components of transformer body noise, transformer accessory fan noise and turbine fan noise by setting the porosity of silicone rubber micro-perforated sound-absorbing panels, the thickness of the micro-perforated sound-absorbing panels, and the position and distance of the sound-absorbing panels. The orientation adjustment section allows for arbitrary adjustment of the air outlet orientation to avoid the side of the plant boundary with a higher risk of exceeding the noise standard, thereby reducing the risk of the plant boundary noise level exceeding the standard.

[0059] When a fire hazard or fire occurs in the main transformer room, the forced ventilation section, through the combination of sensors, can automatically control detection, link with fire suppression, and open forced ventilation dampers to shorten the ventilation path for forced ventilation. It can also link with foam sprinkler fire suppression systems for spray fire suppression. After the fire hazard is eliminated, the smoke and oxygen content in the main transformer room can be continuously monitored, providing life support data for firefighters and maintenance personnel entering the premises.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A functional zone-type noise reduction ventilation system for power facilities, characterized in that: include: The forced ventilation section (2), the sound absorption and noise reduction section (3), and the orientation adjustment section (4) are connected from bottom to top by sound insulation and sealing rubber (41). The forced ventilation section (2) is connected to the ventilation opening of the main transformer room (1). Each section is fixed to the outer wall of the main transformer room (1) by a fastening support structure (5). The forced ventilation section (2) includes: a turbine fan (25), an actuator motor (26), and a forced ventilation baffle (27). The turbine fan (25) is located at the ventilation opening of the main transformer room (1), and the actuator motor (26) is located inside the forced ventilation baffle (27). The actuator motor (26) can control the forced ventilation baffle (27) to open for forced ventilation and smoke extraction. The sound absorption and noise reduction section (3) is fixed with a locally square-hole silicone rubber micro-perforated sound-absorbing plate (31) for absorbing noise. The locally square-hole silicone rubber micro-perforated sound-absorbing plate (31) includes two types, A and B. Type A is a locally square-hole silicone rubber micro-perforated sound-absorbing plate with square holes set at the right angle of the sound-absorbing plate, and Type B is a locally square-hole silicone rubber micro-perforated sound-absorbing plate with square holes set in the middle of one side of the sound-absorbing plate. The locally square-hole silicone rubber micro-perforated sound-absorbing plates of types A and B are not equidistant from each other and are installed alternately and rotated in the sound absorption and noise reduction section (3) to form a spiral square hole channel for ventilation. The orientation adjustment section (4) includes an extension section (42), an orientation adjustment structure (43), and an air outlet (44), which are used to adapt to the height of the main transformer room (1) and adjust the orientation of the air outlet of the noise reduction ventilation system. The temperature sensor installed in the noise reduction ventilation system performs periodic detection. When the temperature sensor's detection result does not exceed the set threshold, the temperature sensor continues to perform periodic detection; when the temperature sensor's detection result exceeds the set threshold, the smoke sensor is activated. When the smoke sensor detects that the result does not exceed the set threshold, the turbine fan (25) operates at low and medium speeds; when the smoke sensor detects that the result exceeds the set threshold, the turbine fan (25) operates at high speeds, and the foam fire extinguishing device is activated, the forced exhaust ventilation baffle (27) pops open, and the oxygen content sensor is activated to detect. When the oxygen content sensor detects that the requirements for personnel entry are met, the temperature sensor continues to perform periodic detection; when the oxygen content sensor detects that the requirements for personnel entry are not met, the turbine fan (25) continues to run at high speed until the oxygen content sensor detects that the requirements for personnel entry are met.

2. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The forced ventilation section (2) also includes: an oxygen content sensor (21), a temperature sensor (22), a smoke sensor (23), and a foam fire extinguishing sprinkler device (24). The oxygen content sensor (21), temperature sensor (22), smoke sensor (23), and foam fire extinguishing sprinkler device (24) are linked together to detect and extinguish fire in the main transformer room (1).

3. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The forced ventilation section (2) also includes a pull ring (28), which is located on the outside of the forced ventilation baffle (27) and is used by maintenance personnel to manually pull open the baffle with an insulated operating rod to ensure ventilation and smoke exhaust when the actuator (26) or its control system is damaged.

4. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The length of the extension section (42) can be adjusted according to the height of the main transformer room (1) to adapt to the height of the main transformer room.

5. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The orientation adjustment structure (43) is a retractable structure made of sound-insulating and sealing rubber material, used to adjust the orientation of the air outlet of the noise reduction duct system.

6. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The air outlet (44) is designed with a slanted cut to prevent rainwater from entering the noise reduction duct.

7. The functional zone noise reduction ventilation system for power facilities according to claim 1, characterized in that: The outer walls of each section of the noise reduction and ventilation system are made of rust-resistant sound insulation material, and each section is fixed to the outer wall of the main structure of the power facility by expansion bolts.

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