Dustproof electric power cabinet

Abstract

The invention discloses a dustproof power cabinet, and relates to the technical field of high-voltage power transmission equipment. The device comprises a sealed cabinet body and a positive pressure gas inlet chamber installed on the sealed cabinet body, the positive pressure gas inlet chamber comprises a three-section type treatment cabin, and the three-section type treatment cabin comprises a fan cabin, an oil-gas separation cabin and a dust separation and deposition cabin which are sequentially communicated from top to bottom; a fan is mounted in the fan cabin, and the fan is powered by a circuit which is turned on and turned off at regular time; the exhaust end of the fan is communicated with the air inlet of the sealed cabinet body, and the air inlet end of the fan is communicated with the oil-gas separation cabin; the oil-gas separation cabin is filled with dust removal oil for adsorbing and washing dust in air; the dust separation and deposition cabin is filled with water or an aqueous solution which is immiscible with the dust removal oil; and an aeration component is arranged between the oil-gas separation cabin and the dust separation and deposition cabin. Compared with a traditional fan and HEPA filter screen mode, the dustproof and heat dissipation device can stably provide dustproof and heat dissipation effects for the sealed electric power cabinet for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a dustproof electric power cabinet for dustproof and heat dissipation. Background Art

[0002] With the development of the power industry, more and more electrical cabinets are required to be used directly outdoors. Due to the harsh outdoor environment, especially when dust in the air enters the power cabinet, it will cause heat dissipation, waterproofing, and insulation problems.

[0003] The power cabinet needs to be dustproof and heat-dissipating. For power cabinets with low heat generation, the natural heat dissipation of the cabinet shell can be used to make the power cabinet sealed. However, for power cabinets where natural cooling of the cabinet body is not enough to meet the heat dissipation performance, it is necessary to install an active heat dissipation module, such as liquid cooling, air conditioning and other powerful heat dissipation methods, to adapt to large combined power cabinets with relatively large heat dissipation power. For power cabinets with heat dissipation requirements between natural cooling and refrigerant heat exchange cooling, the existing technology generally adopts fan heat dissipation, directly introducing air outside the power cabinet into the power cabinet and then discharging it through the heat dissipation window. This heat dissipation method has a low cost, but there are obvious problems: the air introduced by the fan must be filtered, but the filter screen will gradually become clogged with use, resulting in poor ventilation. In addition, the filter screen is generally made of non-woven fiber HEPA material. Although this material has a high filtration accuracy, it is easy to break in outdoor environments, especially humid environments. Affect the effect of heat dissipation and dust removal. More than half of the equipment failures in the power cabinet are caused by temperature out of control. Therefore, solving the dust removal and heat dissipation problems is a relatively large problem in this part of the power cabinet. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a dustproof power cabinet in view of the above-mentioned technical deficiencies. Compared with the traditional method of adding a fan and a HEPA filter, it can provide long-term and stable dustproof and heat dissipation effects for the sealed power cabinet.

[0005] The technical solution adopted by the present invention is: to provide a dust-proof power cabinet, including a sealed cabinet body, and a positive pressure air intake chamber installed on the sealed cabinet body, the positive pressure air intake chamber including: a three-stage processing cabin, which is constructed for filtering the air entering the sealed cabinet body, and the three-stage processing cabin is a fan cabin, an oil-gas separation cabin, and a dust separation deposition cabin connected in sequence from top to bottom; a fan is installed in the fan cabin, and the fan is powered by a circuit that is turned on and off at a fixed time; the fan exhaust end is connected to the air inlet of the sealed cabinet body, and the air inlet end of the fan is connected to the oil-gas separation cabin; the oil-gas separation cabin is filled with dust removal oil for adsorbing and washing dust in the air; the dust separation deposition cabin is filled with water or aqueous solution that is immiscible with the dust removal oil; an aeration component is arranged between the oil-gas separation cabin and the dust separation deposition cabin; the aeration component is connected with an air inlet pipe, and the upper end of the air inlet pipe is connected with a waterproof air inlet window; the upper end of the air inlet pipe is at a height equivalent to that of the fan cabin in the vertical direction.

[0006] Preferably, the aeration component of the dustproof power cabinet includes a V-shaped air chamber, and aeration micropores are arranged on the upper two side surfaces of the V-shaped air chamber; a sedimentation channel is arranged through the middle of the bottom of the V-shaped air chamber; the sedimentation channel is constructed to collect dust settled from the dust removal oil and sink it into the dust separation and sedimentation chamber below.

[0007] Preferably, a plurality of vertically arranged rectifying baffles are evenly arranged in the oil-gas separation cabin of the dustproof power cabinet, and the rectifying baffles are used to ensure that the bubbles are evenly dispersed in the horizontal direction when they float up in the dust removal oil.

[0008] Preferably, at least two guide plates staggered in the vertical direction are provided on the upper part of the oil-gas separation cabin of the dustproof power cabinet; the guide plates are used to prevent the dust removal oil from splashing when the bubbles in the dust removal oil burst.

[0009] Preferably, the air inlet pipe of the dustproof power cabinet is made of transparent material, and the positive pressure air inlet chamber is provided with an oil level window for observing the air inlet pipe; in the cabin section of the dust separation and sedimentation cabin, the positive pressure air inlet chamber is sealed with a transparent cover for replacing dust removal oil or water or aqueous solution.

[0010] Preferably, the dust removal oil of the dustproof power cabinet is polymethylsiloxane.

[0011] Preferably, the liquid filled in the dust separation and sedimentation chamber of the dustproof power cabinet is a polyaluminium chloride aqueous solution.

[0012] Preferably, a positive pressure exhaust window is installed on the sealed cabinet body of the dustproof power cabinet; the positive pressure exhaust window is provided with an exhaust port opening downward, and two staggered soft diaphragms are encapsulated in the exhaust port; the staggered area of ​​the two soft diaphragms is constructed to discharge the air in the sealed cabinet body with positive pressure, and to keep the sealed cabinet body sealed when the fan is not turned on.

[0013] It is difficult to find a balance between the filtering accuracy and dust-proof heat dissipation in the traditional dust-proof power cabinet with fan cooling and HEPA filtration between forced air cooling and dust-proof heat dissipation. This is a well-known technical problem in the art. The technical solution adopted by the present invention is that the air introduced enters the dust removal oil in the form of tiny bubbles through the aeration component for washing. The tiny bubbles are adsorbed by the dust removal oil during the floating process to remove the dust in the air. After the dust is mixed with the dust removal oil, it is deposited to the bottom of the oil-gas separation cabin due to its density greater than the dust removal oil, and then continues to sink into the water or solution in the dust deposition cabin. Since the two liquids in the oil-gas separation cabin and the dust deposition cabin are immiscible, the dust content in the oil-gas separation cabin can be controlled at a stable level, and the oil-gas separation cabin can be kept with a continuous and stable dust absorption capacity. When the fan is turned off, the dust in the static dust removal oil will gradually deposit in the dust deposition cabin without turbulence, which can further improve the dust deposition efficiency.

[0014] Other technical effects of the present invention will be clearly explained in the development of some embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 Schematic cross-sectional view of ; Figure 3 It is a cross-sectional schematic diagram of the positive pressure exhaust window.

[0016] In the figure, 1. sealed cabinet; 2. positive pressure air inlet chamber; 3. fan compartment; 4. oil and gas separation compartment; 5. dust separation and deposition compartment; 6. fan; 7. air inlet 7; 8. air inlet pipe; 9. waterproof air inlet window; 10. V-shaped air chamber; 11. deposition channel; 12. rectifying baffle; 13. guide plate; 14. oil level window; 15. transparent cover; 16. positive pressure exhaust window; 17. soft diaphragm. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1 , Figure 2As shown, a dustproof power cabinet comprises a sealed cabinet body 1, a positive pressure air inlet chamber 2 installed on the sealed cabinet body 1, the positive pressure air inlet chamber 2 comprises: a three-stage processing cabin, which is configured to filter the air entering the sealed cabinet body 1, the three-stage processing cabin is a fan cabin 3, an oil-gas separation cabin 4, and a dust separation and deposition cabin 5 which are sequentially connected from top to bottom; a fan 6 is installed in the fan cabin 3, and the fan 6 is powered by a circuit that is turned on and off at a fixed time; the exhaust end of the fan 6 is connected to the sealed cabinet The air inlet 7 of the body 1 is connected, and the air inlet end of the fan 6 is connected to the oil-gas separation cabin 4; the oil-gas separation cabin 4 is filled with dust removal oil for absorbing and washing dust in the air; the dust separation sedimentation cabin 5 is filled with water or an aqueous solution that is immiscible with the dust removal oil; an aeration component is provided between the oil-gas separation cabin 4 and the dust separation sedimentation cabin 5; the aeration component is connected with an air inlet pipe 8, and the upper end of the air inlet pipe 8 is connected with a waterproof air inlet window 9; the upper end of the air inlet pipe 8 is at a height equivalent to that of the fan 6 cabin 3 in the vertical direction.

[0019] like Figure 1 As shown, the positive pressure air inlet chamber 2, as a container constituting the three-stage processing cabin and the air inlet pipe 8, can be movably mounted on the side wall of the sealed cabinet 1. The sealed cabinet 1 itself has an installation gap. When the fan 6 is introduced with positive pressure air, the air will flow out from the installation gap of the sealed cabinet 1, taking away the heat at the same time. The dustproof power cabinet of the present invention is a non-high-power electrical installation cabinet. The required heat dissipation does not require the fan 6 to be turned on continuously. The fan 6 is powered by a circuit that is turned on and off at a scheduled time according to the preset heat dissipation requirements. When the fan 6 is turned off, the three cabins are all in a static state, and the dust is gradually deposited in the dust deposition cabin in the oil-gas separation cabin 4. The upper part of the water or aqueous solution in the dust deposition cabin is covered with dust removal oil and will not evaporate and be consumed. The bubbles released by the aeration component float upward and will not enter the lower dust deposition cabin, carrying water vapor and causing the consumption of water or aqueous solution.

[0020] Further optimizing this embodiment, the aeration component of the dustproof power cabinet includes a V-shaped air chamber 10, and aeration micropores are arranged on both sides of the upper part of the V-shaped air chamber 10; a deposition channel 11 is arranged through the middle of the bottom of the V-shaped air chamber 10; the deposition channel 11 is constructed to collect dust settled from the dust removal oil and then sink it into the dust separation deposition chamber 5 below. The aeration component of the present invention can adopt the aeration head used for sewage oxygenation treatment in the prior art, and can also adopt the aeration component of the structure of this embodiment. When the fan 6 is turned off, the dust received by the outer wall of the V-shaped air chamber 10 is easy to gather in the middle. When the fan 6 is turned on, the middle part of the V-shaped air chamber 10 is the deposition channel 11 without aeration micropores. In this way, in the vertical direction of the oil-gas separation chamber 4, a relatively stable dust deposition area without bubble disturbance will be formed. When the fan 6 is turned on, this relatively stable deposition area will increase the dynamic adsorption amount of dust in the dust removal oil in a steady state.

[0021] To further optimize this embodiment, a plurality of vertically arranged rectifying baffles 12 are evenly arranged in the oil-gas separation cabin 4 of the dustproof power cabinet. The rectifying baffles 12 are used to make the bubbles in a uniform dispersion system in the horizontal direction when they float in the dust removal oil. During the floating process of the bubbles, they will disturb and merge with each other, and the vertical rising speeds are different, with a fast flow rate in the middle and slow flow rates on both sides, resulting in the horizontal direction gathering towards the middle, causing disturbance in the middle and affecting the deposition of dust. The rectifying baffles 12 can suppress the gathering of bubbles in the horizontal direction and further promote the formation of a relatively static deposition environment in the central area.

[0022] To further optimize this embodiment, at least two guide plates 13 staggered in the vertical direction are provided on the upper part of the oil-gas separation cabin 4 of the dustproof power cabinet; the guide plates 13 are used to prevent the dust removal oil from splashing when the bubbles in the dust removal oil burst.

[0023] To further optimize this embodiment, the air inlet pipe 8 of the dustproof power cabinet is made of transparent material, and the positive pressure air inlet chamber 2 is provided with an oil level window 14 for observing the air inlet pipe 8; in the cabin section of the dust separation and sedimentation cabin 5, the positive pressure air inlet chamber 2 is sealed with a transparent cover 15 for replacing dust removal oil or water or aqueous solution.

[0024] To further optimize this embodiment, the dust removal oil of the dustproof power cabinet is polymethylsiloxane; the liquid filled in the dust separation and sedimentation chamber 5 of the dustproof power cabinet is a polyaluminum chloride aqueous solution.

[0025] As dust removal oil, polymethylsiloxane has low cost, is non-volatile, has strong fluidity, is insoluble in water, and is insoluble in inorganic solvents in water. The aqueous solution of polyaluminium chloride has a strong flocculation effect, which can quickly flocculate and deposit dust in the aqueous solution to keep it clear; in addition, the aqueous solution can also be other flocculant solutions, such as cationic polyacrylamide aqueous solution.

[0026] like Figure 3 As shown, the present embodiment is further optimized, a positive pressure exhaust window 16 is installed on the sealed cabinet 1 of the dustproof power cabinet; the positive pressure exhaust window 16 is provided with an exhaust port opening downward, and two staggered soft diaphragms 17 are encapsulated in the exhaust port; the staggered area of ​​the two soft diaphragms 17 is constructed to discharge the air in the sealed cabinet 1 under positive pressure, and to keep the sealed cabinet 1 airtight when the fan 6 is not turned on. The installation position of the positive pressure exhaust window 16 can be set in a targeted manner according to the heating position of the power equipment inside the sealed power cabinet.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A dustproof power cabinet, characterized in that: It comprises a sealed cabinet and a positive pressure air inlet chamber installed on the sealed cabinet, wherein the positive pressure air inlet chamber comprises: a three-stage processing cabin, which is constructed for filtering the air entering the sealed cabinet, wherein the three-stage processing cabin comprises a fan cabin, an oil-gas separation cabin, and a dust separation deposition cabin which are connected in sequence from top to bottom; a fan is installed in the fan cabin, and the fan is powered by a circuit which is opened and closed at a fixed time; the fan exhaust end is connected to the air inlet of the sealed cabinet, and the fan air inlet end is connected to the oil-gas separation cabin; the oil-gas separation cabin is filled with dust removal oil for absorbing and washing dust in the air; the dust separation deposition cabin is filled with water or an aqueous solution which is immiscible with the dust removal oil; an aeration component is arranged between the oil-gas separation cabin and the dust separation deposition cabin; the aeration component is connected with an air inlet pipe, and the upper end of the air inlet pipe is connected with a waterproof air inlet window; the upper end of the air inlet pipe is at a height equivalent to that of the fan cabin in the vertical direction.

2. The dustproof power cabinet according to claim 1, characterized in that: The aeration component includes a V-shaped air chamber, and aeration micropores are arranged on the upper two side surfaces of the V-shaped air chamber; a sedimentation channel is arranged through the middle of the bottom of the V-shaped air chamber; the sedimentation channel is constructed to collect dust settled from the dust removal oil and sink it into the dust separation sedimentation chamber below.

3. The dustproof power cabinet according to claim 2, characterized in that: A plurality of vertically arranged rectifying baffles are evenly arranged in the oil-gas separation cabin. The rectifying baffles are used to ensure that the bubbles are evenly dispersed in the horizontal direction when they float up in the dust removal oil.

4. The dustproof power cabinet according to claim 3, characterized in that: The upper part of the oil-gas separation cabin is provided with at least two guide plates staggered in the vertical direction; the guide plates are used to prevent the dust removal oil from splashing when the bubbles in the dust removal oil burst.

5. The dustproof power cabinet according to claim 1, characterized in that: The air inlet pipe is made of transparent material, and the positive pressure air inlet chamber is provided with an oil level window for observing the air inlet pipe; in the cabin section of the dust separation and deposition cabin, the positive pressure air inlet chamber is sealed with a transparent cover for replacing dust removal oil or water or aqueous solution.

6. The dustproof power cabinet according to claim 1, characterized in that: The dust removal oil is polymethylsiloxane.

7. The dustproof power cabinet according to claim 1, characterized in that: The liquid filled in the dust separation and sedimentation chamber is a polyaluminium chloride aqueous solution.

8. The dustproof power cabinet according to claim 1, characterized in that: A positive pressure exhaust window is installed on the sealed cabinet; the positive pressure exhaust window is provided with an exhaust port opening downward, and two staggered soft diaphragms are encapsulated in the exhaust port; the staggered area of ​​the two soft diaphragms is constructed to discharge the air in the sealed cabinet under positive pressure, and to keep the sealed cabinet airtight when the fan is not turned on.

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