A salt-fog-proof switch cabinet for offshore wind power

Abstract

The application belongs to the technical field of switch cabinets, and discloses a salt mist-proof switch cabinet for offshore wind power, which comprises a cabinet body and a support, the front of the cabinet body is hingedly sealed with an equipment door and a maintenance door, an exhaust port is formed in the bottom of the cabinet body, and a fan and a salt mist electrostatic adsorption device are installed, an air inlet is formed in the right side of the cabinet body, partition plates one, two and three are fixedly installed on the inner wall of the cabinet body, a flow guide mechanism is installed on the inner wall of the air inlet, and a heat dissipation mechanism is fixedly installed on the top of the partition plate one. The device utilizes the design that the flow guide pipe and the air inlet are perpendicular to each other, guides the offshore environmental wind which is perpendicular to the air inlet, makes it flow into the air inlet along the flow guide opening and the flow guide pipe, thereby ensuring that the air pressure inside the flow guide pipe acts on the filter screen and the moisture absorbing filler in a positive direction, avoiding the air pressure imbalance on the two sides of the air inlet, and improving the air circulation efficiency inside the cabinet body.

Description

Technical Field

[0001] This invention belongs to the field of switchgear technology, specifically a salt spray resistant switchgear for offshore wind power. Background Technology

[0002] A switchgear is an electrical device with a metal enclosure structure, housing various switches, circuit breakers, and AC contactors. Switchgear is sometimes used in offshore wind farms, where the complex marine environment, including salt spray, causes severe electrochemical corrosion to the metal contacts. To address this, existing technologies employ sealed, salt spray-proof switchgear, using electrostatic salt spray adsorption devices to absorb the salt spray and maintain the purity of the air flowing into the switchgear. Since the switchgear is closed in the shut-off state, the air inlet and outlet are the only ventilation openings. However, the complex wind environment at sea can cause significant deviations in airflow direction at the air inlet, such as a 90° angle. This can result in a reverse pressure difference between the inside and outside of the air inlet, meaning the air pressure inside the cabinet is higher than the outside pressure. This can prevent proper air circulation through the two ventilation openings, reducing airflow efficiency and affecting heat dissipation, especially in extremely windy conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a salt spray resistant switchgear for offshore wind power, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a salt spray resistant switchgear for offshore wind power, comprising a cabinet and a support frame. The front of the cabinet is sealed and hinged with an equipment door and a maintenance door. An exhaust port is provided at the bottom of the cabinet, and a fan and a salt spray electrostatic adsorption device are installed thereon. An air inlet is provided on the right side of the cabinet. Partition 1, Partition 2, and Partition 3 are fixedly installed on the inner wall of the cabinet. A flow guiding mechanism is installed on the inner wall of the air inlet. A heat dissipation mechanism is fixedly installed on the top of Partition 1.

[0005] The flow guiding mechanism includes a mounting plate, a filter screen is installed inside the mounting plate, two sets of mounting strips are symmetrically installed on the front and rear sides of the outer side of the mounting plate, and two sets of flow guiding plates are installed in the front and rear through the mounting strips. The flow guiding plate has a flow guiding port on its front side, and a flow guiding pipe is fixedly installed on the opposite side of the two sets of flow guiding plates.

[0006] The cabinet has a mounting frame fixedly installed on the bottom right side of its inner wall, and the mounting frame is filled with moisture-absorbing filler.

[0007] Preferably, the top of the partition plate one is provided with two sets of through holes one and two sets of through holes;

[0008] The heat dissipation mechanism includes an isolation plate, with a front sealing strip and a rear sealing strip glued to the front and rear sides of the isolation plate, respectively. The front sealing strip and the rear sealing strip are both made of rubber blocks and are respectively sealed and abutted against the rear side of the equipment door and the inner wall of the cabinet. The airflow guiding mechanism is made of heat dissipation copper sheet and is welded and fixed to the top of the partition plate.

[0009] Preferably, two sets of through holes are symmetrically opened on the left and right sides of the top of the partition plate, and two sets of through holes are also symmetrically opened on the left and right sides of the top of the partition plate, with the through holes being located on the inner side of the partition plate and the through holes being located on the outer side of the partition plate.

[0010] Preferably, bolts are installed on both the upper and lower sides of the mounting plate, and are installed on the right side of the air inlet by bolt pressing. A protective sleeve is fixedly installed on the outer side of the bolt. The protective sleeve is made of rubber block and is fixedly connected to the mounting plate by adhesive.

[0011] Preferably, a filter screen, made of metal, is fitted inside the mounting plate.

[0012] Preferably, each set of the mounting strips consists of two strips. The bottom of the guide plate has an open mounting groove on the side near the mounting plate. The mounting strip is fitted into the mounting groove. The top view cross-sectional shape of the mounting strip is an isosceles trapezoid.

[0013] Preferably, the guide tube is L-shaped, and the axis of the guide tube facing the mounting plate is coplanar with and perpendicular to the axis of the guide port.

[0014] Preferably, the flow guide ports are configured in five groups and are distributed longitudinally at equal intervals, and the flow guide ports are connected to one end of the flow guide pipe.

[0015] Preferably, the second partition is vertically fixedly connected to the bottom center of the first partition at a position slightly to the right, and its bottom is fixedly connected to the bottom of the inner wall of the cabinet. The third partition is fixedly connected to the bottom of the right side of the inner wall of the cabinet and is located below the first partition, with a gap between the left side of the third partition and the right side of the second partition.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This device, by adding a flow guiding mechanism to the outside of the cabinet, can achieve vertical wind guidance in extreme environments, maintain the effective air intake of the air inlet in this state, and reduce the probability of opposite pressure differences between the inside and outside when the air inlet deviates significantly from the ambient wind direction. This is mainly achieved by installing an installation plate on the right side of the cabinet, and using two sets of installation strips on its side to engage and install the flow guiding plate and flow guiding pipe. The design of the flow guiding pipe being perpendicular to the direction of the air inlet guides the marine ambient wind perpendicular to the direction of the air inlet, so that it flows vertically along the flow guiding port and flow guiding pipe into the air inlet. This ensures that the air pressure inside the flow guiding pipe acts positively on the filter screen and moisture-absorbing packing, thereby avoiding air pressure imbalance on the inside and outside of the air inlet and improving the air circulation efficiency inside the cabinet.

[0018] 2. Then, the inner cavity of the cabinet is divided into two by a partition. The upper side of the partition is a space for installing switches and other equipment. The partition has a mounting bracket inside. The space above the partition is divided into two air circulation areas by an isolation plate. The isolation plate separates the through holes 1 and 2, allowing the fresh, cool air entering the cabinet to move along two independent channels, namely the inner and outer sides of the heat dissipation mechanism. On the one hand, the heat dissipation mechanism directly absorbs the heat generated by the electrical equipment in the cabinet and carries away the heat simultaneously through the two air circulation areas. With the vertical guidance of the guide pipe, the air circulation efficiency is improved, thus making the heat dissipation efficiency of the cabinet higher.

[0019] 3. Finally, through holes one and two are set around the perimeter of the isolation plate, one on the outside and one on the inside, thus forming two air circulation areas around the isolation plate. This allows for all-round heat dissipation on the inner and outer sides of the isolation plate and promotes air circulation within the cabinet cavity. Furthermore, through the diversion of airflow by through hole one, the amount of outside air entering the cabinet cavity and directly placing the equipment is reduced, thus reducing the degree of salt spray corrosion in the air, reducing direct contact between air and equipment, and also reducing the degree of corrosion inside the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external appearance of the structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A;

[0022] Figure 3 This is a front sectional view of the structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B;

[0024] Figure 5 This is a schematic diagram of the internal structure of the cabinet of the present invention;

[0025] Figure 6 This is a top sectional view of the cabinet body of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point C;

[0027] Figure 8 This is a schematic diagram showing the separation of the partition and the heat dissipation mechanism of the present invention;

[0028] Figure 9 This is a schematic diagram showing the separation of the flow guiding mechanism, mounting frame, and moisture-absorbing filler of the present invention.

[0029] In the diagram: 1. Cabinet; 11. Equipment door; 12. Maintenance door; 13. Bracket; 14. Partition 1; 141. Through hole 1; 142. Through hole 2; 15. Partition 2; 16. Partition 3; 17. Fan; 18. Exhaust port; 19. Salt spray electrostatic adsorption device; 110. Air inlet; 2. Air guiding mechanism; 21. Mounting plate; 22. Filter screen; 23. Mounting strip; 24. Bolt; 241. Protective sleeve; 25. Air guide plate; 26. Air guide port; 27. Air guide pipe; 28. Mounting groove; 3. Heat dissipation mechanism; 31. Isolation plate; 32. Front sealing strip; 33. Rear sealing strip; 4. Mounting frame; 5. Moisture-absorbing filler. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown, this embodiment of the invention provides a salt spray resistant switchgear for offshore wind power, including a cabinet 1 and a support 13. The front of the cabinet 1 is sealed and hinged with an equipment door 11 and a maintenance door 12. The bottom of the cabinet 1 is provided with an exhaust port 18 and a fan 17 and a salt spray electrostatic adsorption device 19 are installed. The right side of the cabinet 1 is provided with an air inlet 110. The inner wall of the cabinet 1 is fixedly installed with partition 14, partition 2 15 and partition 3 16. The inner wall of the air inlet 110 is provided with a flow guiding mechanism 2. The top of partition 14 is fixedly installed with a heat dissipation mechanism 3.

[0032] The flow guiding mechanism 2 includes a mounting plate 21. A filter screen 22 is installed inside the mounting plate 21. Two sets of mounting strips 23 are symmetrically installed on the front and rear sides of the outer side of the mounting plate 21. Two sets of flow guiding plates 25 are installed in the front and rear through the mounting strips 23. A flow guiding port 26 is opened on the front of the flow guiding plate 25. A flow guiding pipe 27 is fixedly installed on the opposite side of the two sets of flow guiding plates 25.

[0033] Among them, an installation frame 4 is fixedly installed at the bottom of the right side of the inner wall of the cabinet 1, and a moisture-absorbing filler 5 is installed inside the installation frame 4.

[0034] This device, by adding a flow guide mechanism 2 to the outside of the cabinet 1, can achieve vertical wind guidance in extreme environments, maintain the effective air intake of the air inlet 110 in this state, and reduce the probability of opposite pressure differences between the inside and outside of the air inlet 110 when there is a large deviation between the air inlet 110 and the ambient wind direction. This is mainly achieved by installing an installation plate 21 on the right side of the cabinet 1, and using two sets of installation strips 23 installed on its side to engage and install the flow guide plate 25 and the flow guide pipe 27. By utilizing the design of the flow guide pipe 27 being perpendicular to the direction of the air inlet 110, the marine ambient wind perpendicular to the direction of the air inlet 110 is guided, so that it flows vertically along the flow guide port 26 and the flow guide pipe 27 into the air inlet 110. This ensures that the air pressure inside the flow guide pipe 27 acts positively on the filter screen 22 and the moisture-absorbing filler 5, thereby avoiding air pressure imbalance on the inside and outside of the air inlet 110 and improving the air circulation efficiency inside the cabinet 1.

[0035] Among them, the top of the partition 14 is provided with two sets of through holes 141 and through holes 142 respectively;

[0036] The heat dissipation mechanism 3 includes an isolation plate 31. A front sealing strip 32 and a rear sealing strip 33 are glued to the front and rear sides of the isolation plate 31, respectively. Both the front sealing strip 32 and the rear sealing strip 33 are made of rubber blocks and respectively seal against the rear side of the equipment door 11 and the inner wall of the cabinet 1. The flow guiding mechanism 2 is made of heat dissipation copper sheet and is welded and fixed to the top of the partition plate 14.

[0037] The inner cavity of the cabinet 1 is divided into two by a partition 14. The upper side of the partition 14 is a space for installing switches and other equipment. The partition 14 has a mounting bracket inside. The space above the partition 14 in the inner cavity of the cabinet 1 is divided into two air circulation areas, an inner and an outer one, by an isolation plate 31. The isolation plate 31 separates the inner and outer through holes 141 and 142, and allows the fresh cold air entering the inner cavity of the cabinet 1 to move along two independent channels, namely the inner and outer sides of the heat dissipation mechanism 3. On the one hand, the heat dissipation mechanism 3 directly absorbs the heat generated by the electrical equipment in the inner cavity of the cabinet 1, and carries away the heat simultaneously through the two air circulation areas. With the vertical guidance of the guide pipe 27, the air circulation efficiency is improved, thereby making the heat dissipation efficiency of the cabinet 1 higher.

[0038] Among them, two sets of through holes 141 are symmetrically opened on the left and right sides of the top of the partition 14, and two sets of through holes 142 are also symmetrically opened on the left and right sides of the top of the partition 14. The through holes 142 are located on the inner side of the isolation plate 31, and the through holes 141 are located on the outer side of the isolation plate 31.

[0039] Through-hole 141 and through-hole 2 142 are set one outside and one inside the periphery of the isolation plate 31, thus forming two air circulation areas around the isolation plate 31. This allows for all-round heat dissipation on the inner and outer sides of the isolation plate 31 and promotes air circulation in the inner cavity of the cabinet 1. Furthermore, through-hole 141, the amount of outside air entering the inner cavity of the cabinet 1 and directly placing the equipment is reduced, thus reducing the degree of corrosion from salt spray in the air. Note: The salt spray electrostatic adsorption device 19 cannot adsorb 100% of the salt spray. Therefore, reducing the direct contact between air and equipment can also reduce the degree of corrosion.

[0040] Bolts 24 are installed on both the upper and lower sides of the mounting plate 21, and are pressed into the right side of the air inlet 110 by the bolts 24. A protective sleeve 241 is fixedly installed on the outer side of the bolts 24. The protective sleeve 241 is made of rubber block and is fixedly connected to the mounting plate 21 by adhesive.

[0041] Bolt 24 is used to fix mounting plate 21 to the side of cabinet 1. The protective sleeve 241 on the outside of bolt 24 can prevent bolt 24 from directly contacting air, thus playing a sealing role and reducing the degree of corrosion of bolt 24.

[0042] The mounting plate 21 has a filter screen 22 installed inside it, and the filter screen 22 is made of metal.

[0043] The filter screen 22 is used to filter larger impurities in the air. Together with the moisture-absorbing filler 5, it dehumidifies the air, making the fresh air entering the inner cavity of the cabinet 1 dry and pure, and reducing the degree of corrosion of the equipment.

[0044] Each set of mounting strips 23 consists of two strips. The bottom of the guide plate 25 is provided with an unpenetrated mounting groove 28 on the side near the mounting plate 21. The mounting strip 23 is fitted into the mounting groove 28. The top view cross-sectional shape of the mounting strip 23 is an isosceles trapezoid.

[0045] The mounting strip 23 is used to install the guide plate 25. It is set in two sets on both sides of the mounting plate 21, so that the guide plate 25 can be installed and fixed on different mounting strips 23. The isosceles trapezoidal structure design of the mounting strip 23 can prevent the guide plate 25 from shifting after installation.

[0046] The guide tube 27 is L-shaped, and the axis of the end of the guide tube 27 facing the mounting plate 21 is coplanar with the axis of the guide port 26 and perpendicular to each other.

[0047] The L-shaped guide tube 27 can guide the airflow at a 90° angle perpendicular to the air inlet 110 and is connected to the guide port 26.

[0048] Among them, the flow guide 26 is set in five groups and is distributed longitudinally at equal intervals. The flow guide 26 is connected to one end of the flow guide pipe 27.

[0049] The airflow inlet 26 is set in five groups, so that the airflow entering the airflow inlet 26 is evenly distributed, thereby maintaining the filter surface of the filter screen 22 with a uniform workload. Combined with the installation strip 23, the utilization efficiency of the filter screen 22 is further improved.

[0050] Among them, partition 2 15 is vertically fixedly connected to the bottom middle right position of partition 1 14, and its bottom is fixedly connected to the bottom of the inner wall of cabinet 1. Partition 3 16 is fixedly connected to the bottom right side of the inner wall of cabinet 1, and is located below partition 1 14. A gap is left between the left side of partition 3 16 and the right side of partition 2 15.

[0051] Partition 2 15 is used to seal the left and right spaces at the bottom of the inner cavity of the cabinet 1. Fresh air from the outside enters the right side of partition 2 15 through air inlet 110, and enters the upper space of the inner cavity of the cabinet 1 through through holes 141 and 142 on the right side. Then it enters the left side of partition 2 15 through through holes 141 and 142 on the left side, and finally exits through fan 17 and exhaust port 18. The establishment of partition 2 15 extends the air circulation path and enhances the heat dissipation effect of the cabinet 1.

[0052] Working principle:

[0053] First, install the switch, circuit breaker or AC contactor on the mounting bracket on the inner wall of the cabinet 1. Then close the equipment door 11 so that it seals against the front sealing strip 32. Use the isolation plate 31 to divide the part of the inner cavity of the cabinet 1 above the partition 14 into two parts: one is the external flow area between the outer side of the isolation plate 31 and the inner wall of the cabinet 1, and the other is the internal flow area of ​​the inner cavity of the cabinet 1 along the inner side of the isolation plate 31 and above the partition 14.

[0054] Then, fan 17 is activated and draws downwards, creating negative pressure inside cabinet 1, thus directing airflow between the internal and external circulation areas as follows: Figure 3As indicated by the arrow, outside air is initially filtered by the airflow guiding mechanism 2 to remove large particles of impurities. After being dehumidified by the moisture-absorbing packing 5, it is then adsorbed by the salt mist electrostatic adsorption device 19. Under negative pressure, it flows upward through the gap between partition 2 15 and partition 3 16, and enters the upper part of the cabinet 1's inner cavity through the through holes 2 142 and 141 located on the right side, respectively. The isolation plate 31 absorbs most of the heat from electrical switches and other equipment within the cabinet 1. The fresh air, filtered by the moisture-absorbing packing 5 and the salt mist electrostatic adsorption device 19, flows freely from both the inner and outer circulation areas. The airflow direction is... Figure 3 As indicated by the arrow, the high-speed airflow carries the heat generated by the heat collected in the isolation plate 31 and the inner cavity of the cabinet 1 downwards along the through holes 141 and 142 on the left side and into the fan 17, and then exhausts it through the exhaust port 18, completing a complete airflow cycle.

[0055] When the wind environment at sea is complex, and the wind direction is at a 90° angle relative to the orientation of the air inlet 110, the wind direction is as follows: Figure 6 As shown by the arrow, air enters the interior of the guide pipe 27 through the guide port 26 and passes vertically through the filter screen 22 in the guide direction of the guide pipe 27, thereby ensuring that the air pressure inside the guide pipe 27 acts positively on the filter screen 22 and the moisture-absorbing filler 5, thus avoiding air pressure imbalance on the inside and outside of the air inlet 110.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A salt spray resistant switchgear for offshore wind power, comprising a cabinet (1) and a support (13), wherein the front of the cabinet (1) is sealed and hinged with an equipment door (11) and a maintenance door (12), the bottom of the cabinet (1) is provided with an exhaust port (18) and is equipped with a fan (17) and a salt spray electrostatic adsorption device (19), and the right side of the cabinet (1) is provided with an air inlet (110), characterized in that: The inner wall of the cabinet (1) is fixedly installed with partition 1 (14), partition 2 (15) and partition 3 (16), the inner wall of the air inlet (110) is installed with a flow guiding mechanism (2), and the top of partition 1 (14) is fixedly installed with a heat dissipation mechanism (3). The flow guiding mechanism (2) includes a mounting plate (21), a filter screen (22) is installed inside the mounting plate (21), two sets of mounting strips (23) are symmetrically installed on the front and rear sides of the outer side of the mounting plate (21), and two sets of flow guiding plates (25) are installed in the front and rear through the mounting strips (23). The flow guiding plate (25) has a flow guiding port (26) on its front side, and a flow guiding pipe (27) is fixedly installed on the opposite side of the two sets of flow guiding plates (25). Among them, a mounting frame (4) is fixedly installed on the bottom right side of the inner wall of the cabinet (1), and a moisture-absorbing filler (5) is installed inside the mounting frame (4); The top of the partition plate (14) is provided with two sets of through holes (141) and through holes (142). The heat dissipation mechanism (3) includes an isolation plate (31), with a front sealing strip (32) and a rear sealing strip (33) glued to the front and rear sides of the isolation plate (31), respectively. The front sealing strip (32) and the rear sealing strip (33) are both made of rubber blocks and are sealed against the rear side of the equipment door (11) and the inner wall of the cabinet (1), respectively. The flow guiding mechanism (2) is made of heat dissipation copper sheet and is welded and fixed to the top of the partition plate (14). Two sets of through holes (141) are symmetrically opened on the left and right sides of the top of partition plate (14), and two sets of through holes (142) are also symmetrically opened on the left and right sides of the top of partition plate (14). The through holes (142) are located inside the isolation plate (31), and the through holes (141) are located outside the isolation plate (31).

2. The anti-salt spray switchgear for offshore wind power according to claim 1, characterized in that: Bolts (24) are installed on both the upper and lower sides of the mounting plate (21), and are pressed and installed on the right side of the air inlet (110) by the bolts (24). A protective sleeve (241) is fixedly installed on the outer side of the bolts (24). The protective sleeve (241) is made of rubber block and is fixedly connected to the mounting plate (21) by adhesive.

3. The anti-salt spray switchgear for offshore wind power according to claim 1, characterized in that: The mounting plate (21) is internally fitted with a filter screen (22), which is made of metal.

4. The anti-salt spray switchgear for offshore wind power according to claim 1, characterized in that: The number of each set of mounting strips (23) is two. The bottom of the guide plate (25) near the mounting plate (21) has an unpenetrated mounting groove (28). The mounting strip (23) is fitted into the mounting groove (28). The top view cross-section of the mounting strip (23) is an isosceles trapezoid.

5. A salt spray resistant switchgear for offshore wind power according to claim 1, characterized in that: The guide tube (27) is L-shaped, and the axis of the end of the guide tube (27) facing the mounting plate (21) is coplanar with the axis of the guide port (26) and perpendicular to each other.

6. A salt spray resistant switchgear for offshore wind power according to claim 1, characterized in that: The flow guide (26) is set in five groups and is distributed longitudinally at equal intervals. The flow guide (26) is connected to one end of the flow guide pipe (27).

7. A salt spray resistant switchgear for offshore wind power according to claim 1, characterized in that: The second partition (15) is vertically fixed to the bottom right of the first partition (14), and its bottom is fixed to the bottom of the inner wall of the cabinet (1). The third partition (16) is fixed to the bottom of the right side of the inner wall of the cabinet (1) and is located below the first partition (14). There is a gap between the left side of the third partition (16) and the right side of the second partition (15).

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