Dust-proof power cabinet

Abstract

The present invention discloses a dust-proof power cabinet, which relates to the technical field of high-voltage power transmission equipment. It includes a sealed cabinet body and a positive-pressure air inlet chamber installed on the sealed cabinet body. The positive-pressure air inlet chamber includes a three-stage treatment chamber, and the three-stage treatment chamber is successively communicated from top to bottom with a fan chamber, an oil-gas separation chamber, and a dust separation and sedimentation chamber; a fan is installed in the fan chamber, and the fan is powered by a circuit that is periodically turned on and off; 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 chamber; the oil-gas separation chamber is filled with dust removal oil for adsorbing and washing dust in the air; the dust separation and sedimentation chamber is filled with water or an aqueous solution that is immiscible with the dust removal oil; an aeration component is arranged between the oil-gas separation chamber and the dust separation and sedimentation chamber. Compared with the traditional method of using a fan and a HEPA filter, the present invention can provide the functions of dust prevention and heat dissipation for the sealed power cabinet in a long-term and stable manner.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, especially a dust-proof power cabinet for dust prevention and heat dissipation. Background Art

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

[0003] The power cabinet needs to be dust-proof and heat-dissipating. For power cabinets with relatively small heat generation, the natural heat dissipation method of the cabinet body can be adopted, and the power cabinet can be made into a sealed type. However, for power cabinets whose natural cooling of the cabinet body is not sufficient to meet the heat dissipation performance, an active heat dissipation module needs to be installed, such as strong heat dissipation methods like liquid cooling and air conditioning, to adapt to combined large power cabinets with relatively large heat dissipation power. For power cabinets whose heat dissipation requirements are between natural cooling and refrigerant heat exchange cooling, the existing technology generally adopts the fan heat dissipation method, directly introducing the 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 as the filter screen gradually clogs during use, it causes poor ventilation. In addition, the filter screen generally uses non-woven fiber HEPA material. Although this material has a relatively high filtration accuracy, in the outdoor environment, especially in a humid environment, it is easily damaged, affecting the heat dissipation and dust removal effects. And more than half of the reasons for equipment failures in the power cabinet are caused by temperature runaway. Therefore, solving the problems of dust removal and heat dissipation is a relatively big problem existing in this part of the power cabinet. Summary of the Invention

[0004] The technical problem to be solved by the present invention is, in view of the above-mentioned existing technical deficiencies, to provide a dust-proof power cabinet, which can provide the functions of dust prevention and heat dissipation for the sealed power cabinet in a long-term and stable manner compared with the traditional method of using a fan and a HEPA filter screen.

[0005] The technical solution adopted by the present invention is as follows: A dust-proof power cabinet is provided, which includes a sealed cabinet body and a positive-pressure air inlet chamber installed on the sealed cabinet body. The positive-pressure air inlet chamber includes: a three-stage treatment chamber, which is configured to filter the air entering the sealed cabinet body. The three-stage treatment chamber is successively communicated from top to bottom with a fan chamber, an oil-gas separation chamber, and a dust separation and sedimentation chamber; a fan is installed in the fan chamber, and the fan is powered by a circuit that is periodically turned on and off; 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 chamber; the oil-gas separation chamber is filled with a dust-removing oil for adsorbing and washing the dust in the air; the dust separation and sedimentation chamber is filled with water or an aqueous solution that is immiscible with the dust-removing oil; an aeration component is arranged between the oil-gas separation chamber and the dust separation and sedimentation chamber; the aeration component is communicated with an air inlet pipe, and the upper end of the air inlet pipe is communicated with a waterproof air inlet window; the upper end of the air inlet pipe is at a height equivalent to that of the fan chamber in the vertical direction.

[0006] Preferably, the aeration component of the dust-proof power cabinet includes a V-shaped air chamber, and aeration micropores are arranged on the upper sides of both sides of the V-shaped air chamber; a sedimentation channel is penetrated through the middle of the bottom of the V-shaped air chamber; the sedimentation channel is configured to collect the dust settled from the dust-removing oil and sink it into the lower dust separation and sedimentation chamber.

[0007] Preferably, a plurality of vertically arranged rectifying partition plates are uniformly arranged in the oil-gas separation chamber of the dust-proof power cabinet, and the rectifying partition plates are used to make the bubbles in the dust-removing oil be in a uniform dispersion system in the horizontal direction when floating.

[0008] Preferably, at least two flow guiding plates are arranged in a staggered manner in the vertical direction on the upper part of the oil-gas separation chamber of the dust-proof power cabinet; the flow guiding plates are used to block the splashing of the dust-removing oil when the bubbles in the dust-removing oil burst.

[0009] Preferably, the air inlet pipe of the dust-proof power cabinet is made of a transparent material, and an oil level viewing window for observing the air inlet pipe is opened on the positive-pressure air inlet chamber; in the cabin section of the dust separation and sedimentation chamber, a transparent cover for replacing the dust-removing oil or water and aqueous solution is hermetically arranged on the positive-pressure air inlet chamber.

[0010] Preferably, the dust-removing oil of the dust-proof power cabinet is polydimethylsiloxane.

[0011] Preferably, the liquid filled in the dust separation and sedimentation chamber of the dust-proof power cabinet is an aqueous solution of polyaluminum chloride.

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

[0013] In a traditional dust-proof power cabinet with fan cooling and HEPA filtration, it is difficult to find a balance between filtration accuracy and dust-proof heat dissipation between forced air cooling and dust-proof heat dissipation. This is a well-known technical problem in this field. The technical solution adopted by the present invention is that the introduced air enters the dust removal oil in the form of tiny bubbles through the aeration component. During the upward floating process of the tiny bubbles, the dust in the air is removed by the adsorption of the dust removal oil. After the dust is mixed into the dust removal oil, due to its density being greater than that of the dust removal oil, it deposits at the bottom of the oil-gas separation chamber and then continues to sink into the water or solution in the dust separation and sedimentation chamber. Since the two liquids in the oil-gas separation chamber and the dust separation and sedimentation chamber are immiscible, the dust content in the oil-gas separation chamber can be controlled at a stable level, maintaining the continuous and stable dust absorption capacity of the oil-gas separation chamber. When the fan is shut down, the dust in the static dust removal oil will gradually deposit into the dust separation and sedimentation chamber in a state without turbulent flow, which can further improve the dust deposition efficiency.

[0014] Other technical effects of the present invention will be clearly described in the expansion of some embodiments. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is Figure 1 a cross-sectional schematic diagram of

[0017] Figure 3 is a cross-sectional schematic diagram of the positive pressure exhaust window.

[0018] In the figure, 1, sealed cabinet; 2, positive pressure intake chamber; 3, fan compartment; 4, oil-gas separation chamber; 5, dust separation and sedimentation chamber; 6, fan; 7, intake port 7; 8, intake pipe; 9, waterproof intake window; 10, V-shaped gas chamber; 11, sedimentation channel; 12, rectifying partition; 13, deflector; 14, oil level sight glass; 15, transparent cover; 16, positive pressure exhaust window; 17, soft diaphragm. Detailed Description of the Invention

[0019] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] As Figure 1 、 Figure 2As shown in the figure, a dust-proof power cabinet includes a sealed cabinet body 1 and a positive-pressure air inlet chamber 2 installed on the sealed cabinet body 1. The positive-pressure air inlet chamber 2 includes: a three-stage treatment chamber, which is configured to filter the air entering the sealed cabinet body 1. The three-stage treatment chamber includes a fan 6 chamber 3, an oil-gas separation chamber 4, and a dust separation and sedimentation chamber 5 that are sequentially connected from top to bottom; a fan 6 is installed in the fan 6 chamber 3, and the fan 6 is powered by a circuit that is periodically turned on and off; the exhaust end of the fan 6 is connected to the air inlet 7 of the sealed cabinet body 1, and the intake end of the fan 6 is connected to the oil-gas separation chamber 4; the oil-gas separation chamber 4 is filled with dust removal oil for adsorbing and washing the dust in the air; the dust separation and sedimentation chamber 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 chamber 4 and the dust separation and sedimentation chamber 5; the aeration component is connected to an air inlet pipe 8, and the upper end of the air inlet pipe 8 is connected to a waterproof air inlet window 9; the upper end of the air inlet pipe 8 is at the same height as the fan 6 chamber 3 in the vertical direction.

[0021] As Figure 1 shown, the positive-pressure air inlet chamber 2, as the container constituting the three-stage treatment chamber and the air inlet pipe 8, can be movably installed on the side wall of the sealed cabinet body 1. The sealed cabinet body 1 itself has an installation gap. When the fan 6 passes in positive-pressure air, the air will flow out from the installation gap of the sealed cabinet body 1 and take away heat at the same time. This dust-proof power cabinet of the present invention is a non-high-power electrical installation cabinet, and the required heat dissipation does not require the fan 6 to be continuously turned on. The fan 6 is powered by a circuit that is periodically turned on and off according to the preset heat dissipation requirements. When the fan 6 is turned off, all three cabin sections are in a static state, and the dust gradually deposits in the dust separation and sedimentation chamber in the oil-gas separation chamber 4. The water or aqueous solution in the dust separation and sedimentation chamber is covered by the dust removal oil on the upper part and will not evaporate and consume. The bubbles released by the aeration component float upward and will not enter the lower dust separation and sedimentation chamber to carry water vapor and cause the consumption of water or aqueous solution.

[0022] To further optimize this embodiment, the aeration component of the dust-proof power cabinet includes a V-shaped air chamber 10. Aeration micropores are provided on the upper sides of both sides of the V-shaped air chamber 10; a sedimentation channel 11 is provided through the middle of the bottom of the V-shaped air chamber 10; the sedimentation channel 11 is configured to collect the dust settled from the dust removal oil and sink it into the lower dust separation and sedimentation chamber 5. The aeration component of the present invention can use an aeration head for sewage aeration treatment in the prior art, or can also use the aeration component with the structure of this embodiment. When the fan 6 is in the off state, the dust received by the outer wall of the V-shaped air chamber 10 is easy to gather towards the middle. When the fan 6 is in the on state, there is a sedimentation channel 11 in the middle of the V-shaped air chamber 10 and no aeration micropores are provided. 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 in the on state, this relatively stable deposition area will increase the dynamic adsorption amount of dust in the dust removal oil under steady state.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered 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 dust-proof power cabinet, characterized in that: It includes a sealed cabinet body and a positive-pressure air inlet chamber installed on the sealed cabinet body. The positive-pressure air inlet chamber includes: a three-stage treatment cabin, which is configured for filtering the air entering the sealed cabinet body. The three-stage treatment cabin is successively and communicatively connected from top to bottom as a fan cabin, an oil-gas separation cabin, and a dust separation and sedimentation cabin; a fan is installed in the fan cabin, and the fan is powered by a circuit that is periodically turned on and off; 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 the air; the dust separation and sedimentation cabin is filled with water or an 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 and sedimentation cabin; the aeration component is communicated with an air inlet pipe, and the upper end of the air inlet pipe is communicated 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; When the fan is turned off, all three cabin sections are in a static state, and the dust gradually deposits from the oil-gas separation cabin into the dust separation and sedimentation cabin; the upper part of the water or aqueous solution in the dust separation and sedimentation cabin is covered by the dust removal oil and will not evaporate and consume. The bubbles released by the aeration component float upward and will not enter the lower dust separation and sedimentation cabin to carry water vapor, resulting in the consumption of water or aqueous solution; The aeration component includes a V-shaped air chamber, and aeration microholes are arranged on the upper sides of both sides of the V-shaped air chamber; a sedimentation channel is penetrated through the middle of the bottom of the V-shaped air chamber; the sedimentation channel is configured for the dust settled from the dust removal oil to gather and sink into the lower dust separation and sedimentation cabin.

2. The dust-proof power cabinet according to claim 1, wherein: A number of vertically arranged rectifying partition plates are evenly arranged in the oil-gas separation cabin, and the rectifying partition plates are used to keep the bubbles in a uniform dispersion system in the horizontal direction when floating in the dust removal oil.

3. The dust-proof power cabinet according to claim 2, wherein: At least two flow guide plates staggered in the vertical direction are arranged on the upper part of the oil-gas separation cabin; the flow guide plates are used to prevent the splashing of the dust removal oil when the bubbles in the dust removal oil burst.

4. The dust-proof power cabinet according to claim 1, wherein: The air inlet pipe is made of a transparent material, and an oil level viewing window for observing the air inlet pipe is opened on the positive-pressure air inlet chamber; in the cabin section of the dust separation and sedimentation cabin, a transparent cover for replacing the dust removal oil or water and aqueous solution is hermetically arranged on the positive-pressure air inlet chamber.

5. The dust-proof power cabinet according to claim 1, characterized in that: The dust removal oil is polydimethylsiloxane.

6. The dust-proof power cabinet according to claim 1, wherein: The liquid filled in the dust separation and sedimentation cabin is an aqueous solution of polyaluminum chloride.

7. The dust-proof power cabinet according to claim 1, characterized in that: A positive-pressure exhaust window is installed on the sealed cabinet body; the positive-pressure exhaust window is provided with an exhaust port with an opening downward, and two soft diaphragms arranged in a staggered manner are encapsulated in the exhaust port; the staggered area of the two soft diaphragms is configured for positively exhausting the air in the sealed cabinet body and keeping the sealed cabinet body airtight when the fan is not turned on.

Images