Offshore Wind Power Tank-Type Switchgear

Abstract

The present invention relates to the technical field of power equipment, and specifically discloses an offshore wind power pot-type switchgear, which includes a tank body, a circuit breaker, a three-position switch, and a combined switch. Among them, the tank body includes an integrated main tank body and at least two side tank bodies. The side tank bodies are connected to the main tank body and extend along the radial direction of the main tank body. The inner cavity of the main tank body is communicated with the inner cavity of the side tank bodies; the circuit breaker is arranged in the main tank body, and isolation static contacts corresponding to the side tank bodies one by one are provided on the circuit breaker; the three-position switch is arranged in one of the side tank bodies; a combined switch is arranged in each of the remaining side tank bodies, and the combined switch includes a two-position switch and a quick earthing switch. This offshore wind power pot-type switchgear has a compact structure, can meet the use requirements of a smaller internal space in the fan tower, so that it is not necessary to increase the volume of the offshore wind turbine equipment, and reduces the operation cost and operation risk of the offshore platform.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and particularly to an offshore wind power pot-type switchgear. Background Art

[0002] Offshore wind turbines include wind turbine towers, transformers, high-voltage switchgear, and wind power generation equipment. Among them, the high-voltage switchgear is located inside the wind turbine tower, connected to the transformer above and the submarine cable below.

[0003] To ensure the service life, the high-voltage switchgear generally adopts a box-type gas-insulated switchgear or GIS. The overall volume of the existing gas-insulated switchgear or GIS is relatively large. When applied to offshore wind turbines, it is necessary to increase the volume of the offshore wind turbine equipment, increasing the operation cost and operation risk of the offshore platform.

[0004] Therefore, there is an urgent need to propose an offshore wind power pot-type switchgear to solve the above technical problems. Summary of the Invention

[0005] The present invention provides an offshore wind power pot-type switchgear, which is structurally compact, can meet the use requirements of a relatively small internal space of the wind turbine tower, so that it is not necessary to increase the volume of the offshore wind turbine equipment, reducing the operation cost and operation risk of the offshore platform.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The offshore wind power pot-type switchgear includes:

[0008] A pot body, including an integrated main pot body and at least two side pot bodies. The side pot bodies are connected to the main pot body and extend along the radial direction of the main pot body. The inner cavity of the main pot body is communicated with the inner cavity of the side pot bodies;

[0009] A circuit breaker, arranged in the main pot body, and provided with isolating static contacts corresponding to the side pot bodies one by one;

[0010] A three-position switch, arranged in one of the side pot bodies;

[0011] A combined switch, and the combined switch including a two-position switch and a quick earthing switch is arranged in each of the remaining side pot bodies.

[0012] Optionally, the side pot body includes a side cover for sealing and plugging the opening of the side pot body; the three-position switch includes:

[0013] An earthing static contact, arranged on the side cover and oppositely arranged with the isolating static contact;

[0014] An incoming line bushing, hermetically penetrating through the side cover;

[0015] An incoming line connection conductor is passed through the incoming line bushing;

[0016] A three-position mechanism includes a three-position base, a first moving contact and a first driving mechanism, wherein the first moving contact is arranged on the three-position base, and the first moving contact has a closing working position for electrically connecting the isolating static contact to the incoming line connection conductor, an opening working position for disconnecting the isolating static contact from the incoming line connection conductor, and a grounding working position for electrically connecting the grounding static contact to the incoming line connection conductor, and the first driving mechanism is used to drive the first moving contact to switch between the closing working position, the opening working position and the grounding working position.

[0017] Optionally, the three-position base has a conductive property, the three-position base is connected to one end of the incoming line connection conductor, the first moving contact is slidably arranged in the three-position base, the opposite ends of the first moving contact in the sliding direction are respectively arranged opposite to the isolating static contact and the grounding static contact, and the outer surface of the first moving contact is provided with a rack, and the rack extends along the sliding direction of the first moving contact;

[0018] The first driving mechanism includes a driving member and a rotating shaft. The rotating shaft is rotatably penetrated through the three-station base. A gear meshing with the rack is provided at a position of the rotating shaft opposite to the first moving contact. In addition, both ends of the rotating shaft are sealed and penetrated through the side tank body. The driving member is arranged outside the side tank body. The output shaft of the driving member is connected to one end of the rotating shaft for driving the rotating shaft to rotate. The rotating shaft drives the first moving contact to slide between the isolating static contact and the grounding static contact through rotation.

[0019] Optionally, the racks are provided on opposite sides of the first moving contact, two first driving mechanisms are provided, and the first driving mechanisms and the racks are arranged in a one-to-one correspondence.

[0020] Optionally, the first moving contact is slidably connected to the three-station base, at least two transfer conductors are arranged on the incoming line connection conductor, at least one end of the transfer conductor that is not connected to the incoming line connection conductor is slidably attached to the upper surface of the first moving contact, and a rack is arranged on the lower surface of the first moving contact, and the rack extends along the sliding direction of the first moving contact;

[0021] The first driving mechanism includes a driving member and a rotating shaft. The rotating shaft is rotatably disposed through the three-position base. A gear meshing with the rack is provided at a position of the rotating shaft opposite to the first moving contact. Moreover, both ends of the rotating shaft are sealingly disposed through the side tank body. The driving member is arranged outside the side tank body. The output shaft of the driving member is connected to one end of the rotating shaft for driving the rotating shaft to rotate. The rotating shaft drives the first moving contact to slide between the isolating static contact and the grounding static contact through rotation.

[0022] Optionally, a plurality of the first driving mechanisms are provided. The plurality of first driving mechanisms are arranged at intervals along the sliding direction of the first moving contact and are located below the first moving contact.

[0023] Optionally, the first moving contact is of a cylindrical structure and extends along the axial direction of the side tank body. The first moving contact slides along the axial direction of the side tank body.

[0024] Optionally, the three-position base has electrical conductivity. The first moving contact and the second moving contact are respectively provided at both ends of the three-position base. An incoming line static contact is provided at the end of the incoming line connecting conductor. When the first moving contact is in the closing working position, the first moving contact contacts the isolating static contact, and the second moving contact contacts the incoming line static contact. When the first moving contact is in the opening working position, both the first moving contact and the second moving contact are separated from the isolating static contact, the incoming line static contact, and the grounding static contact. When the first moving contact is in the grounding position, the first moving contact contacts the incoming line static contact, and the second moving contact contacts the grounding static contact.

[0025] The first driving mechanism includes a driving member and a rotating shaft. The rotating shaft is disposed through the three-position base. Both ends of the rotating shaft are sealingly disposed through the side tank body. The driving member is arranged outside the side tank body. The output shaft of the driving member is connected to one end of the rotating shaft for driving the rotating shaft to rotate. The rotating shaft drives the three-position base to rotate through rotation, so that the three-position base drives the first moving contact to switch between the closing working position, the opening working position, and the grounding working position.

[0026] Optionally, the side tank body includes a side cover for sealing and plugging the opening of the side tank body.

[0027] The two-position switch includes an outgoing line bushing, an outgoing line connecting conductor, a two-position base, a third moving contact, and a second driving mechanism. The outgoing line bushing is hermetically penetrated through the side cover, the outgoing line connecting conductor is penetrated through the outgoing line bushing, the third moving contact is arranged on the two-position base, the third moving contact has a closing working position for electrically connecting the isolating static contact with the outgoing line connecting conductor and an opening working position for disconnecting the isolating static contact from the outgoing line connecting conductor, and the second driving mechanism is used to drive the third moving contact to switch between the closing working position and the opening working position;

[0028] The quick earthing switch includes a quick earthing contact, a quick earthing knife switch, and a third driving mechanism. The quick earthing contact is arranged on the two-position base, the quick earthing knife switch is rotatably arranged on the side cover, and the third driving mechanism is used to drive the quick earthing knife switch to rotate so that the end of the quick earthing knife switch contacts or separates from the quick earthing contact.

[0029] Optionally, there are three side tanks. Two of the side tanks are arranged on the same side of the main tank and are spaced along the axial direction of the main tank. The other side tank is arranged on the opposite side of the two side tanks on the same side and is symmetrically arranged with one of the side tanks relative to the main tank. The combined switches are arranged in both of the two symmetrically arranged side tanks.

[0030] The beneficial effects of the present invention are as follows:

[0031] The present invention provides an offshore wind power canned switchgear, which includes a tank body, a circuit breaker, a three-position switch, and a combined switch. The main tank body and the side tank body of the tank body are of an integral structure, and the side tank body is directly communicated with the main tank body. With such a setting, the connecting flange between the main tank body and the side tank body, as well as the corresponding connecting structure provided for the connecting flange, are omitted, which not only reduces the size of the offshore wind power canned switchgear in the radial direction of the main tank body, but also simplifies the overall structure, thereby reducing the operation cost and operation risk of the offshore platform. At the same time, due to the integral structure of the main tank body and the side tank body, the air leakage risk is relatively low, improving the airtightness and safety of the offshore wind power canned switchgear. Filling high-pressure air into the tank body as an insulating gas can also improve the environmental protection of the offshore wind power canned switchgear.

[0032] The combined switch includes a two-position switch and a quick earthing switch. By setting the quick earthing switch, quick earthing under high voltage levels can be realized, which not only ensures the safety of use but also improves the universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the offshore wind power canned switchgear provided in Embodiment 1 of the present invention;

[0034] Figure 2 Schematic diagram of the internal structure of the offshore wind power canned switchgear provided in the first embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the three-position mechanism provided in the first embodiment of the present invention after removing the three-position base;

[0036] Figure 4 Assembly drawing of the three-position base and the rotating shaft provided in the first embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the structure of the three-position mechanism provided in the second embodiment of the present invention Figure 1 (The moving contact is in the closing working position);

[0038] Figure 6 Schematic diagram of the structure of the three-position mechanism provided in the second embodiment of the present invention Figure 2 (The moving contact is in the opening working position);

[0039] Figure 7 Schematic diagram of the structure of the three-position mechanism provided in the second embodiment of the present invention Figure 3 (The moving contact is in the grounding working position);

[0040] Figure 8 Schematic diagram of the structure of the three-position mechanism provided in the third embodiment of the present invention Figure 1 (The moving contact is in the closing working position);

[0041] Figure 9 Schematic diagram of the structure of the three-position mechanism provided in the third embodiment of the present invention Figure 2 (The moving contact is in the opening working position);

[0042] Figure 10 Schematic diagram of the structure of the three-position mechanism provided in the third embodiment of the present invention Figure 3 (The moving contact is in the grounding working position).

[0043] In the figure:

[0044] 100, tank body; 110, main tank body; 111, top cover; 120, side tank body; 121, side cover;

[0045] 200, circuit breaker; 201, isolating static contact; 210, main circuit conductor; 220, branch circuit conductor;

[0046] 300, Three-position switch; 310, Ground static contact; 320, Inlet bushing; 330, Inlet connection conductor; 331, Adapter conductor; 332, Inlet static contact; 340, Three-position mechanism; 341, Three-position base; 3411, Second moving contact; 342, First moving contact; 343, Rotating shaft;

[0047] 400, Combined switch; 410, Two-position switch; 411, Outlet bushing; 412, Outlet connection conductor; 413, Two-position base; 414, Third moving contact; 420, Fast earthing switch; 421, Fast earthing contact; 422, Fast earthing knife switch. Specific embodiments

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0052] Embodiment 1

[0053] This embodiment provides an offshore wind power canned switchgear, which has a compact structure and can meet the usage requirements of a relatively small internal space in the wind turbine tower, so that it is not necessary to increase the volume of the offshore wind turbine equipment, reducing the operation cost and operation risk of the offshore platform.

[0054] Specifically, as shown in Figure 1 and Figure 2 , this offshore wind power canned switchgear includes a tank body 100, a circuit breaker 200, a three-position switch 300, and a combined switch 400.

[0055] Among them, the tank body 100 includes an integrated main tank body 110 and at least two side tank bodies 120. The side tank bodies 120 are connected to the main tank body 110 and extend along the radial direction of the main tank body 110. The inner cavity of the main tank body 110 is communicated with the inner cavity of the side tank bodies 120. The circuit breaker 200 is arranged in the main tank body 110, and isolation static contacts 201 corresponding to the side tank bodies 120 one by one are provided on the circuit breaker 200. The three-position switch 300 is arranged in one of the side tank bodies 120. A combined switch 400 is arranged in each of the remaining side tank bodies 120, and the combined switch 400 includes a two-position switch 410 and a quick earthing switch 420.

[0056] By setting the main tank body 110 and the side tank bodies 120 as an integrated structure and directly connecting the side tank bodies 120 to the main tank body 110, the connection flange between the main tank body 110 and the side tank bodies 120 and the corresponding connection structure for the connection flange are omitted, which not only reduces the size of this offshore wind power canned switchgear along the radial direction of the main tank body 110, but also simplifies the overall structure, thereby reducing the operation cost and operation risk of the offshore platform. At the same time, since the main tank body 110 and the side tank bodies 120 are of an integrated structure, the air leakage risk is relatively low, improving the airtightness and safety of this offshore wind power canned switchgear. Filling high-pressure air into the tank body 100 as the insulating gas can also improve the environmental protection of this offshore wind power canned switchgear.

[0057] Moreover, by setting the combined switch 400 to include a quick earthing switch 420, quick earthing under high voltage levels can be achieved, which not only ensures the safety of use but also improves the universality.

[0058] In a possible embodiment, this offshore wind power canned switchgear is applicable to a voltage level of 72.5 kV.

[0059] Optionally, in this embodiment, there are three side tanks 120. Two of the side tanks 120 are arranged on the same side of the main tank 110 and are spaced along the axial direction of the main tank 110. The other side tank 120 is arranged on the opposite side of the two side tanks 120 on the same side and is symmetrically arranged with one of the side tanks 120 relative to the main tank 110. Combined switches 400 are provided in both of the symmetrically arranged side tanks 120. Such an arrangement can effectively reduce the overall size of the tank 100 on the premise of meeting the design requirements.

[0060] Optionally, the circuit breaker 200 is a vacuum circuit breaker.

[0061] Optionally, continue to refer to Figure 2 , the main tank 110 includes a top cover 111 for sealing the opening of the main tank 110. One end of the circuit breaker 200 is fixed to the inner side of the top cover 111 and extends along the axial direction of the main tank 110. A main circuit conductor 210 extending in the radial direction of the main tank 110 is provided in the middle of the circuit breaker 200, and the end of the main circuit conductor 210 is electrically connected to the isolating static contact 201. A branch circuit conductor 220 is provided at one end of the circuit breaker 200 away from the top cover 111. The branch circuit conductor 220 is divided into two branches in the radial direction of the main tank 110, and the ends of the two branches are respectively connected to an isolating static contact 201.

[0062] Optionally, the isolating static contact 201 is a hollow cylindrical structure with spring fingers inside. Such a setting is beneficial to improving the reliability of closing.

[0063] Furthermore, a circuit breaker control mechanism (not shown in the figure) is also provided outside the top cover 111. The circuit breaker control mechanism is hermetically passed through the top cover 111 and connected to the circuit breaker 200 for controlling the opening and closing of the circuit breaker 200.

[0064] Optionally, there are three circuit breakers 200, and the three circuit breakers 200 respectively correspond to the A phase, B phase, and C phase of the offshore wind power tank-type switchgear.

[0065] Furthermore, continue to refer to Figure 2 , the side tank 120 includes a side cover 121 for sealing the opening of the side tank 120.

[0066] The two-position switch 410 includes an outgoing line bushing 411, an outgoing line connecting conductor 412, a two-position base 413, a third moving contact 414, and a second driving mechanism (not shown in the figure). Among them, the outgoing line bushing 411 is sealingly penetrated through the side cover 121, the outgoing line connecting conductor 412 is penetrated through the outgoing line bushing 411, the third moving contact 414 is arranged on the two-position base 413, and the third moving contact 414 has a closing working position for electrically connecting the isolating static contact 201 and the outgoing line connecting conductor 412 and an opening working position for disconnecting the isolating static contact 201 and the outgoing line connecting conductor 412. The second driving mechanism is used to drive the third moving contact 414 to switch between the closing working position and the opening working position. The two-position switch 410 directly installs the outgoing line bushing 411 on the side cover 121, so that there is no need to additionally provide an outgoing line bushing cylinder for arranging the outgoing line bushing 411, reducing the size and weight of the entire tank body 100, and also reducing the size of the inner cavity of the tank body 100, which is beneficial to reducing the volume of the insulating gas in the tank body 100. Moreover, the two-position switch 410 has a simple structure and is convenient to operate.

[0067] The quick earthing switch 420 includes a quick earthing contact 421, a quick earthing knife switch 422, and a third driving mechanism (not shown in the figure). Among them, the quick earthing contact 421 is arranged on the two-position base 413, the quick earthing knife switch 422 is rotatably arranged on the side cover 121, and the third driving mechanism is used to drive the quick earthing knife switch 422 to rotate so that the end of the quick earthing knife switch 422 contacts or separates from the quick earthing contact 421. The quick earthing switch 420 has a simple structure and is convenient to control.

[0068] Optionally, in this embodiment, the second driving mechanism can fix the two-position base 413 in the side tank body 120 and make the two-position base 413 not contact the inner wall of the side tank body 120. With such a setting, there is no need to set up a pot insulator to achieve insulation between the two-position base 413 and the side tank body 120, which can not only reduce the setting of components but also further reduce the size of the side tank body 120, improving the structural compactness of the offshore wind power tank switchgear.

[0069] Furthermore, as Figures 2 - 4As shown, the side tank 120 includes a side cover 121 for sealing the opening of the side tank 120. The three-position switch 300 includes a ground static contact 310, an incoming line bushing 320, an incoming line connecting conductor 330, and a three-position mechanism 340. Among them, the ground static contact 310 is arranged on the side cover 121 and is arranged opposite to the isolation static contact 201. The incoming line bushing 320 is hermetically penetrated through the side cover 121. The incoming line connecting conductor 330 is penetrated through the incoming line bushing 320. The three-position mechanism 340 includes a three-position base 341, a first moving contact 342, and a first driving mechanism. The first moving contact 342 is arranged on the three-position base 341. The first moving contact 342 has a closing working position for electrically connecting the isolation static contact 201 and the incoming line connecting conductor 330, an opening working position for disconnecting the isolation static contact 201 from the incoming line connecting conductor 330, and a grounding working position for electrically connecting the ground static contact 310 and the incoming line connecting conductor 330. The first driving mechanism is used to drive the first moving contact 342 to switch between the closing working position, the opening working position, and the grounding working position.

[0070] The three-position switch 300 directly installs the incoming line bushing 320 on the side cover 121, so that there is no need to additionally arrange an incoming line bushing cylinder for arranging the incoming line bushing 320, reducing the size and weight of the entire tank 100, and also reducing the size of the inner cavity of the tank 100, which is beneficial to reducing the volume of the insulating gas in the tank 100. Moreover, the three-position switch 300 has a simple structure and is convenient to operate.

[0071] Further, continue to refer to Figure 1 、 Figure 3 and Figure 4 As shown in, the three-position base 341 has electrical conductivity. The three-position base 341 is connected to one end of the incoming line connecting conductor 330. The first moving contact 342 slides through the three-position base 341. The relative two ends in the sliding direction of the first moving contact 342 are respectively arranged opposite to the isolation static contact 201 and the ground static contact 310. A rack is arranged on the outer surface of the first moving contact 342, and the rack extends along the sliding direction of the first moving contact 342. By setting the three-position base 341 to have electrical conductivity, the three-position base 341 can become a bridge for electrical connection between the first moving contact 342 and the incoming line connecting conductor 330. The first driving mechanism includes a driving member and a rotating shaft 343. The rotating shaft 343 rotates through the three-position base 341. A gear meshing with the rack is arranged at the position of the rotating shaft 343 opposite to the first moving contact 342. Moreover, both ends of the rotating shaft 343 are hermetically penetrated through the side tank 120. The driving member is arranged outside the side tank 120. The output shaft of the driving member is connected to one end of the rotating shaft 343 for driving the rotating shaft 343 to rotate. The rotating shaft 343 drives the first moving contact 342 to slide between the isolation static contact 201 and the ground static contact 310 through rotation.

[0072] When one end of the first moving contact 342 contacts the isolating static contact 201 and the other end is separated from the grounding static contact 310, the first moving contact 342 is in the closing working position. The isolating static contact 201 is electrically connected to the incoming line connecting conductor 330 through the first moving contact 342 and the three-position base 341, and the main circuit is conducted. When both ends of the first moving contact 342 are separated from the isolating static contact 201 and the grounding static contact 310 respectively, the first moving contact 342 is in the opening working position. The isolating static contact 201 is disconnected from the incoming line connecting conductor 330, and the main circuit is disconnected. When one end of the first moving contact 342 is separated from the isolating static contact 201 and the other end contacts the grounding static contact 310, the first moving contact 342 is in the grounding working position. The grounding static contact 310 is electrically connected to the incoming line connecting conductor 330 through the first moving contact 342 and the three-position base 341, and the grounding circuit is conducted.

[0073] The three-position switch 300 has a simple structure, which is beneficial to reducing the size of the side tank 120. The rotation of the rotating shaft 343 driven by the driving member realizes the switching of the first moving contact 342 between the three working positions. The structure is simple and the control is convenient. Moreover, a gear-rack meshing structure is adopted between the rotating shaft 343 and the first moving contact 342 to realize the transmission, and the force transmission is reliable. The smoothness and fluency of the movement of the first moving contact 342 are better.

[0074] Furthermore, the three-position base 341 can be fixed inside the side tank 120 through the rotating shaft 343, and the three-position base 341 is not in contact with the inner wall of the side tank 120, realizing insulation. In this way, there is no need to set a pot-type insulator to realize the insulation between the three-position base 341 and the side tank 120, which can not only reduce the setting of components, but also further reduce the size of the side tank 120, improving the structural compactness of the offshore wind power tank-type switchgear.

[0075] Optionally, two opposite through holes are provided on the side tank 120, and both ends of the rotating shaft 343 are respectively inserted into the two through holes. A sealing ring is sleeved on the rotating shaft 343, and the outer wall of the sealing ring fits against the inner wall of the through hole. The sealing between the rotating shaft 343 and the side tank 120 is realized through the sealing ring, and the structure is simple and the sealing performance is better.

[0076] Optionally, in this embodiment, racks are provided on both opposite sides of the first moving contact 342, and two first driving mechanisms are provided. The first driving mechanisms are arranged in one-to-one correspondence with the racks. By providing two first driving mechanisms, the three-position base 341 can be fixed by two rotating shafts 343, improving the stability of the position of the three-position base 341.

[0077] Optionally, in this embodiment, the first moving contact 342 has a cylindrical structure and extends along the axial direction of the side tank 120, and the first moving contact 342 slides along the axial direction of the side tank 120. With such a setting, the size of the side tank 120 can be further reduced.

[0078] It can be understood that the driving member is optional but not limited to a motor.

[0079] Optionally, the incoming line connecting conductor 330 can be connected to the three-position base 341 by means of bolt connection.

[0080] It is worth noting that after the structure of the three-position switch 300 is appropriately adjusted, it can be applied to the two-position switch 410.

[0081] Embodiment 2

[0082] This embodiment provides an offshore wind power canned switchgear, which has substantially the same structure as that of Embodiment 1, and is only improved on the basis of Embodiment 1. Therefore, only the differences between the two are described here, and the same structures of this embodiment and Embodiment 1 will not be elaborated here.

[0083] Specifically, as Figures 5 - 7 shown, in this embodiment, the first moving contact 342 is slidably connected to the three-position base 341. At least two transfer conductors 331 are provided on the incoming line connecting conductor 330. One end of at least one transfer conductor 331 that is not connected to the incoming line connecting conductor 330 slides and adheres to the upper surface of the first moving contact 342. That is, the transfer conductor 331 is a bridge for electrical connection between the incoming line connecting conductor 330 and the first moving contact 342. A rack is provided on the lower surface of the first moving contact 342, and the rack extends along the sliding direction of the first moving contact 342.

[0084] The first driving mechanism includes a driving member and a rotating shaft 343. The rotating shaft 343 rotatably penetrates through the three-position base 341. A gear meshing with the rack is provided at a position of the rotating shaft 343 opposite to the first moving contact 342. And both ends of the rotating shaft 343 are hermetically penetrated through the side tank 120. The driving member is arranged outside the side tank 120, and the output shaft of the driving member is connected to one end of the rotating shaft 343 for driving the rotating shaft 343 to rotate. The rotating shaft 343 drives the first moving contact 342 to slide between the isolating static contact 201 and the grounding static contact 310 through rotation.

[0085] When one end of the first moving contact 342 contacts the isolating static contact 201 and the other end is separated from the grounding static contact 310, the first moving contact 342 is in the closing working position. The isolating static contact 201 is electrically connected to the incoming line connecting conductor 330 through the first moving contact 342 and the transfer conductor 331, and the main circuit is conducted. When both ends of the first moving contact 342 are separated from the isolating static contact 201 and the grounding static contact 310 respectively, the first moving contact 342 is in the opening working position. The isolating static contact 201 is disconnected from the incoming line connecting conductor 330, and the main circuit is disconnected. When one end of the first moving contact 342 is separated from the isolating static contact 201 and the other end contacts the grounding static contact 310, the first moving contact 342 is in the grounding working position. The grounding static contact 310 is electrically connected to the incoming line connecting conductor 330 through the first moving contact 342 and the transfer conductor 331, and the grounding circuit is conducted.

[0086] The three-position switch 300 has a simple structure, which is beneficial to reducing the size of the side tank 120. The rotation of the rotating shaft 343 driven by the driving member realizes the switching of the first moving contact 342 between the three working positions, with a simple structure and convenient control. Moreover, a gear-rack meshing structure is adopted between the rotating shaft 343 and the first moving contact 342 to achieve transmission, with reliable force transmission and better smoothness and fluency of the movement of the first moving contact 342.

[0087] The three-position base 341 can be fixed inside the side tank 120 through the rotating shaft 343, and the three-position base 341 does not contact the inner wall of the side tank 120, realizing insulation. In this way, there is no need to set a pot-type insulator to achieve the insulation between the three-position base 341 and the side tank 120, which can not only reduce the setting of components but also further reduce the size of the side tank 120, improving the structural compactness of the offshore wind power pot-type switchgear.

[0088] By setting that the ends of at least two transfer conductors 331 not connected to the incoming line connecting conductor 330 are all slidably attached to the upper surface of the first moving contact 342, when one of the transfer conductors 331 fails, the remaining transfer conductors 331 can still conduct the main circuit or the grounding circuit, improving the stability and reliability of the conduction of the main circuit and the grounding circuit.

[0089] Optionally, two opposite through holes are provided on the side tank 120, and both ends of the rotating shaft 343 are respectively passed through the two through holes. A sealing ring is sleeved on the rotating shaft 343, and the outer wall of the sealing ring fits the inner wall of the through hole. The sealing between the rotating shaft 343 and the side tank 120 is realized through the sealing ring, with a simple structure and better sealing performance.

[0090] Optionally, in this embodiment, there are two adapter conductors 331, and the two adapter conductors 331 are arranged at intervals along the sliding direction of the first moving contact 342. In other embodiments, the number of adapter conductors 331 can also be set to other values, such as three, four, etc., which can be set according to actual needs, and the present application does not make specific limitations.

[0091] Optionally, in this embodiment, there are multiple first driving mechanisms, and the multiple first driving mechanisms are arranged at intervals along the sliding direction of the first moving contact 342 and are located below the first moving contact 342. By arranging multiple first driving mechanisms below the first moving contact 342, the first moving contact 342 can be supported, reducing the risk of bending deformation of the first moving contact 342 due to its own gravity, thereby improving the coaxiality of each part of the first moving contact 342. The improvement of the coaxiality of the first moving contact 342 can improve the reliability of the contact between the first moving contact 342 and the isolating static contact 201 and the grounding static contact 310, and further improve the reliability of the conduction of the main circuit and the grounding circuit.

[0092] Optionally, in this embodiment, the first moving contact 342 is of a cylindrical structure and extends along the axial direction of the side tank body 120, and the first moving contact 342 slides along the axial direction of the side tank body 120. With such a setting, the size of the side tank body 120 can be further reduced.

[0093] It can be understood that the driving member can be, but is not limited to, a motor.

[0094] It should be noted that the structure of the three-position switch 300 can be appropriately adjusted and applied to the two-position switch 410.

[0095] Embodiment III

[0096] This embodiment provides an offshore wind power canned switchgear, which has substantially the same structure as that of Embodiment I, and is only improved on the basis of Embodiment I. Therefore, only the differences between the two are described here, and the same structures as those in Embodiment I are not described again.

[0097] Specifically, as Figures 8 - 10As shown in the figure, in this embodiment, the three-position base 341 has electrical conductivity. The first moving contact 342 and the second moving contact 3411 are respectively provided at both ends of the three-position base 341. The end of the incoming line connecting conductor 330 is provided with an incoming line static contact 332. The isolation static contact 201 can be electrically connected to the incoming line connecting conductor 330 through the first moving contact 342, the three-position base 341, the second moving contact 3411, and the incoming line static contact 332. The grounding static contact 310 can be electrically connected to the incoming line connecting conductor 330 through the second moving contact 3411, the three-position base 341, the first moving contact 342, and the incoming line static contact 332. The first driving mechanism includes a driving member and a rotating shaft 343. The rotating shaft 343 is inserted through the three-position base 341. The two ends of the rotating shaft 343 are hermetically inserted through the side tank 120. The driving member is arranged outside the side tank 120. The output shaft of the driving member is connected to one end of the rotating shaft 343 for driving the rotating shaft 343 to rotate. The rotating shaft 343 drives the three-position base 341 to rotate through rotation, so that the first moving contact 342 moves between the isolation static contact 201 and the incoming line static contact 332, and the second moving contact 3411 moves between the incoming line static contact 332 and the grounding static contact 310.

[0098] When the first moving contact 342 contacts the isolation static contact 201 and the second moving contact 3411 contacts the incoming line static contact 332, the first moving contact 342 is in the closing working position; when both the first moving contact 342 and the second moving contact 3411 are separated from the isolation static contact 201, the incoming line static contact 332, and the grounding static contact 310, the first moving contact 342 is in the opening working position; when the first moving contact 342 contacts the incoming line static contact 332 and the second moving contact 3411 contacts the grounding static contact 310, the first moving contact 342 is in the grounding position.

[0099] The structure of the three-position switch 300 is simple, which is beneficial to reducing the size of the side tank 120. The rotation of the three-position base 341 driven by the rotating shaft 343 realizes the switching of the first moving contact 342 between the three working positions, with a simple structure and convenient control.

[0100] The three-position base 341 can be fixed inside the side tank 120 through the rotating shaft 343, and the three-position base 341 does not contact the inner wall of the side tank 120, realizing insulation. In this way, there is no need to set a pot-type insulator to achieve the insulation between the three-position base 341 and the side tank 120, which can not only reduce the setting of components but also further reduce the size of the side tank 120, improving the structural compactness of the offshore wind power tank-type switchgear.

[0101] Adopting a double isolation break structure, voltage division is carried out through two isolation breaks, and the insulation performance can be satisfied under a relatively low gas filling pressure and the size of the tank 100.

[0102] Optionally, two opposite through holes are provided on the side tank body 120, and both ends of the rotating shaft 343 are respectively inserted through the two through holes. A sealing ring is sleeved on the rotating shaft 343, and the outer wall of the sealing ring fits against the inner wall of the through hole. The sealing between the rotating shaft 343 and the side tank body 120 is achieved through the sealing ring, with a simple structure and better sealing performance.

[0103] Optionally, in this embodiment, the three-station base 341 is in an "L" shape, and the isolating static contact 201, the end of the incoming line connecting conductor 330, and the grounding static contact 310 are within the same circumference, and the center of this circumference is located on the axis of the rotating shaft 343.

[0104] It can be understood that the driving member is optional but not limited to a motor.

[0105] It is worth noting that the structure of the three-station switch 300 can be applied to the two-station switch 410 after appropriate adjustment.

[0106] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Offshore wind power tank switchgear, characterized in that: include: A tank body (100) comprises an integrated main tank body (110) and at least two side tank bodies (120), wherein the side tank bodies (120) are connected to the main tank body (110) and extend in a radial direction of the main tank body (110), the inner cavity of the main tank body (110) is communicated with the inner cavity of the side tank body (120), and the side tank body (120) comprises a side cover (121) for sealing and blocking an opening of the side tank body (120); A circuit breaker (200) is arranged in the main tank body (110), and the circuit breaker (200) is provided with isolating static contacts (201) corresponding one-to-one to the side tank bodies (120); A three-position switch (300) is arranged in one of the side tanks (120); A combination switch (400), wherein each of the other side tank bodies (120) is provided with the combination switch (400), the combination switch (400) comprises a two-position switch (410) and a fast grounding switch (420), the two-position switch (410) comprises an outlet bushing (411), an outlet connection conductor (412), a two-position base (413), a third moving contact (414) and a second driving mechanism, the outlet bushing (411) is sealed and penetrated through the side cover (121), the outlet connection conductor (412) is penetrated through the outlet bushing (411), and the third moving contact (414) is arranged on the two-position base. On the base (413), the third moving contact (414) has a closing working position for electrically connecting the isolating static contact (201) to the outgoing line connection conductor (412) and an opening working position for disconnecting the isolating static contact (201) from the outgoing line connection conductor (412); the second driving mechanism is used to drive the third moving contact (414) to switch between the closing working position and the opening working position; the second driving mechanism can fix the two-station base (413) in the side tank body (120) and prevent the two-station base (413) from contacting the inner wall of the side tank body (120).

2. The offshore wind power tank switchgear according to claim 1, characterized in that: The three-position switch (300) comprises: A grounding static contact (310) is arranged on the side cover (121) and is arranged opposite to the isolating static contact (201); An inlet bushing (320) is sealingly disposed through the side cover (121); An incoming line connection conductor (330) is inserted through the incoming line bushing (320); A three-position mechanism (340) comprises a three-position base (341), a first moving contact (342) and a first driving mechanism, wherein the first moving contact (342) is arranged on the three-position base (341), and the first moving contact (342) has a closing working position for electrically connecting the isolating static contact (201) to the incoming line connection conductor (330), an opening working position for disconnecting the isolating static contact (201) from the incoming line connection conductor (330), and a grounding working position for electrically connecting the grounding static contact (310) to the incoming line connection conductor (330), and the first driving mechanism is used to drive the first moving contact (342) to switch between the closing working position, the opening working position and the grounding working position.

3. The offshore wind power tank switchgear according to claim 2 is characterized in that: The three-position base (341) has a conductive property, the three-position base (341) is connected to one end of the incoming line connection conductor (330), the first moving contact (342) is slidably arranged on the three-position base (341), the opposite ends of the first moving contact (342) in the sliding direction are respectively arranged opposite to the isolating static contact (201) and the grounding static contact (310), and the outer surface of the first moving contact (342) is provided with a rack, and the rack extends along the sliding direction of the first moving contact (342); The first driving mechanism includes a driving member and a rotating shaft (343), wherein the rotating shaft (343) is rotatably inserted into the three-station base (341), and a gear meshing with the rack is provided at a position of the rotating shaft (343) opposite to the first moving contact (342), and both ends of the rotating shaft (343) are sealed and inserted into the side tank body (120), and the driving member is arranged outside the side tank body (120), and the output shaft of the driving member is connected to one end of the rotating shaft (343) for driving the rotating shaft (343) to rotate, and the rotating shaft (343) drives the first moving contact (342) to slide between the isolating static contact (201) and the grounding static contact (310) through rotation.

4. The offshore wind power tank switchgear according to claim 3 is characterized in that: The racks are provided on opposite sides of the first moving contact (342), two first driving mechanisms are provided, and the first driving mechanisms and the racks are arranged in a one-to-one correspondence.

5. The offshore wind power tank switchgear according to claim 2, characterized in that: The first moving contact (342) is slidably connected to the three-station base (341); at least two transfer conductors (331) are arranged on the incoming line connection conductor (330); at least one end of the transfer conductor (331) not connected to the incoming line connection conductor (330) is slidably attached to the upper surface of the first moving contact (342); a rack is arranged on the lower surface of the first moving contact (342); and the rack extends along the sliding direction of the first moving contact (342); The first driving mechanism includes a driving member and a rotating shaft (343), wherein the rotating shaft (343) is rotatably inserted into the three-station base (341), and a gear meshing with the rack is provided at a position of the rotating shaft (343) opposite to the first moving contact (342), and both ends of the rotating shaft (343) are sealed and inserted into the side tank body (120), and the driving member is arranged outside the side tank body (120), and the output shaft of the driving member is connected to one end of the rotating shaft (343) for driving the rotating shaft (343) to rotate, and the rotating shaft (343) drives the first moving contact (342) to slide between the isolating static contact (201) and the grounding static contact (310) through rotation.

6. The offshore wind power tank switchgear according to claim 5, characterized in that: A plurality of the first driving mechanisms are provided, and the plurality of the first driving mechanisms are arranged at intervals along the sliding direction of the first moving contact (342) and are located below the first moving contact (342).

7. The offshore wind power tank switchgear according to claim 3 or 5, characterized in that: The first moving contact (342) is a cylindrical structure and extends along the axial direction of the side tank body (120); the first moving contact (342) slides along the axial direction of the side tank body (120).

8. The offshore wind power tank switchgear according to claim 2, characterized in that: The three-position base (341) has a conductive property, and the first moving contact (342) and the second moving contact (3411) are respectively provided at two ends of the three-position base (341), and the end of the incoming line connection conductor (330) is provided with an incoming line static contact (332); when the first moving contact (342) is located in the closing working position, the first moving contact (342) contacts the isolating static contact (201), and the second moving contact (3411) contacts the incoming line static contact (332); When the first moving contact (342) is located in the opening working position, the first moving contact (342) and the second moving contact (3411) are both separated from the isolating static contact (201), the incoming static contact (332) and the grounding static contact (310); when the first moving contact (342) is located in the grounding working position, the first moving contact (342) is in contact with the incoming static contact (332), and the second moving contact (3411) is in contact with the grounding static contact (310); The first driving mechanism comprises a driving member and a rotating shaft (343), wherein the rotating shaft (343) is passed through the three-position base (341), and both ends of the rotating shaft (343) are sealed and passed through the side tank body (120), and the driving member is arranged outside the side tank body (120), and the output shaft of the driving member is connected to one end of the rotating shaft (343) for driving the rotating shaft (343) to rotate, and the rotating shaft (343) drives the three-position base (341) to rotate by rotating, so that the three-position base (341) drives the first moving contact (342) to switch between the closing working position, the opening working position and the grounding working position.

9. The offshore wind power tank switchgear according to claim 1, characterized in that: The fast grounding switch (420) comprises a fast grounding contact (421), a fast grounding knife switch (422) and a third driving mechanism, wherein the fast grounding contact (421) is arranged on the two-station base (413), the fast grounding knife switch (422) is rotatably arranged on the side cover (121), and the third driving mechanism is used to drive the fast grounding knife switch (422) to rotate so that the end of the fast grounding knife switch (422) contacts or separates from the fast grounding contact (421).

10. The offshore wind power tank switchgear according to claim 1, characterized in that: Three side tank bodies (120) are provided, wherein two of the side tank bodies (120) are arranged on the same side of the main tank body (110) and are arranged at intervals along the axial direction of the main tank body (110); another side tank body (120) is arranged on the opposite side of the two side tank bodies (120) located on the same side and is arranged symmetrically with one of the side tank bodies (120) relative to the main tank body (110); and the combination switch (400) is provided in both of the two symmetrically arranged side tank bodies (120).

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