Split type variable pitch control system carbon steel cabinet body

Abstract

The utility model discloses a split type variable pitch control system carbon steel cabinet body which comprises a bottom frame and a variable pitch box body arranged on the bottom frame, the bottom frame and the variable pitch box body are detachably arranged, the surface of the variable pitch box body is coated with anti-corrosion paint, and an inter-cabinet grounding device is electrically connected between the variable pitch box body and the bottom frame. The bottom frame is provided with cabinet body installation bolts which are used for installing hubs and are in metal conduction with the hubs. The cabinet body installation bolts are electrically connected with the bottom frame through a cabinet body grounding device. Through the split type design, the box body and the frame can be independently subjected to the electrophoresis and spraying anti-corrosion process, so that the gap at the joint of the box body and the frame has high anti-corrosion performance, and meanwhile, the box body is electrically connected with the frame, so that the variable pitch box body is electrically grounded through the hub.

Description

Technical Field

[0001] The present application relates to the technical field of electrical cabinets, and in particular to a split-type carbon steel cabinet for a pitch control system. Background Art

[0002] With the industrial application of carbon steel cabinets for wind turbine pitch control systems, pitch carbon steel cabinets have been fully promoted in the industry, bringing relatively objective economic cost reduction to pitch control systems.

[0003] However, the existing variable pitch carbon steel cabinet adopts the integral welding process, which results in some gaps in the joints between the upper box and the frame of the cabinet. Although the cabinet adopts the electrophoresis + spraying anti-corrosion process, the gaps and the main frame cavity of the cabinet can only guarantee the electrophoresis process but cannot achieve the effect of a thorough spraying process, resulting in corrosion hazards in the gaps.

[0004] Currently, the industry will apply glue to the welds of the variable pitch cabinet when it leaves the factory. However, in the rainy and humid areas in the south, there will still be moisture when applying glue to the gaps in the carbon steel cabinet of the variable pitch cabinet, posing a risk of corrosion. At the same time, since the cabinet has been treated with anti-corrosion treatment and the surface of the cabinet is not conductive, the variable pitch cabinet cannot be electrically grounded when it is installed on the wheel hub.

[0005] Therefore, in view of the above technical problems, how to improve the anti-corrosion performance of the joints of the carbon steel cabinet and achieve electrical grounding of the cabinet is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0006] The purpose of this application is to provide a split carbon steel cabinet for a pitch control system. Through the split design, the cabinet and the frame can be subjected to the electrophoresis + spraying anti-corrosion process separately, so that the gap at the junction of the two has a higher anti-corrosion performance. At the same time, the electrical connection between the cabinet and the frame enables the cabinet to be electrically grounded through the wheel hub.

[0007] To achieve the above-mentioned objectives, the present application provides a split-type carbon steel cabinet for a pitch control system, comprising a bottom frame and a pitch box arranged on the bottom frame, the bottom frame and the pitch box being detachable, the surface of the pitch box being sprayed with anti-corrosion paint, an inter-cabinet grounding device being electrically connected between the pitch box and the bottom frame, the bottom frame being provided with cabinet mounting bolts for mounting a wheel hub and being metal-conducted with the wheel hub, the cabinet mounting bolts being electrically connected to the bottom frame through the cabinet grounding device.

[0008] Preferably, the pitch box and the bottom frame are both made of an anti-corrosion process of electrophoresis plus spraying, so that the surfaces of all parts of the bottom frame and the pitch box are sprayed with anti-corrosion paint.

[0009] Preferably, the cabinet indirect grounding device includes a first metal plate welded to the pitch box and a second metal plate welded to the bottom frame, one side of the first metal plate contacts one side of the second metal plate, and the contact surfaces are tightly fitted by bolts.

[0010] Preferably, the first metal plate and the second metal plate are made of stainless steel.

[0011] Preferably, a door lock anti-scratch sheet corresponding to the position of the door lock tongue is arranged inside the pitch box, the door lock anti-scratch sheet is made of stainless steel, a waist-shaped hole is arranged on the door lock anti-scratch sheet, and the door lock anti-scratch sheet is adjustably mounted on the pitch box by bolts so that the door lock anti-scratch sheet is in contact with the pitch box and metal conductive.

[0012] Preferably, the cabinet grounding device is made of stainless steel, and after being connected to the bottom frame, the surfaces of the two are in contact and conductive.

[0013] Preferably, the pitch box is fixedly mounted on the bottom frame by a plurality of bolts.

[0014] Preferably, a driving device and a power supply device are installed on the bottom frame, and the driving device and the power supply device are located in the pitch box.

[0015] Compared with the above background technology, the present application has a split design for the bottom frame and the pitch box. As two independent components, the electrophoresis plus spraying painting process can be carried out separately, so as to ensure that each part of the two can be sprayed with anti-corrosion paint, and the pitch box is fixedly connected to the bottom frame after the spraying is completed. Even if there is a certain gap between the two, since the anti-corrosion paint has spread all over the surface of the pitch box and the bottom frame, it still has very excellent anti-corrosion performance at the gap. At the same time, the pitch box and the bottom frame are electrically connected with an inter-cabinet grounding device, and the bottom frame is provided with a cabinet mounting bolt for installing the wheel hub and conducting with the wheel hub metal. At the same time, the cabinet mounting bolt is electrically connected to the bottom frame through the cabinet grounding device, so as to achieve metal conduction between the pitch box and the wheel hub, and finally the pitch box is electrically grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] FIG1 is a three-dimensional diagram of a carbon steel cabinet of a split-type pitch control system provided in an embodiment of the present application.

[0018] In the figure: 1, bottom frame 2, pitch box 3, inter-cabinet grounding device 4, cabinet grounding device 5, cabinet mounting bolts 6, door lock anti-scratch sheet 7, drive equipment 8, power supply equipment. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] As shown in Figure 1, in this embodiment, a split-type pitch control system carbon steel cabinet is provided, which includes a bottom frame 1 and a pitch box 2. The pitch box 2 is detachably arranged on the bottom frame 1. The bottom frame 1 is U-shaped as a whole, that is, the two side edges of the bottom frame 1 have a flange structure, and the pitch box 2 is located between the two flange structures.

[0023] Since the bottom frame 1 and the pitch box 2 are split designs, the bottom frame 1 and the pitch box 2 can be sprayed with paint separately, so that all parts of the surface of the two can be sprayed with anti-corrosion paint. On this basis, during the installation of the pitch box 2 with the bottom frame 1, even if a gap is formed between the two, the gap will not be corroded due to water stored in the gap. It should be noted that the existing pitch carbon steel cabinet adopts an integral welding machine process, so it is impossible to spray anti-corrosion paint on every part of the pitch box 2 and the bottom frame 1, especially the gap, which is even more impossible to spray with anti-corrosion paint. The present application effectively avoids the problem of easy corrosion in the gap through a split design.

[0024] In addition, please refer to Figure 1, the pitch box 2 and the bottom frame 1 are electrically connected with an inter-cabinet grounding device 3, so that the pitch box 2 and the bottom frame 1 are metal-conducted. The bottom frame 1 is provided with a cabinet mounting bolt 5 for mounting the hub and metal-conducting the hub. The cabinet mounting bolt 5 is electrically connected to the bottom frame 1 through the cabinet grounding device 4, so that the bottom frame 1 and the hub are metal-conducted; on this basis, the pitch box 2 is metal-conducted with the hub through the inter-cabinet grounding device 3, the bottom frame 1, the cabinet grounding device 4, and the cabinet mounting bolt 5 in sequence, and the hub is metal-conducted with the earth through the wind turbine structure, so that the pitch box 2 is electrically grounded.

[0025] In summary of the above embodiments, the present application has a split design for the bottom frame 1 and the pitch box 2. As two independent components, the electrophoresis plus spraying painting process can be performed separately, so as to ensure that each part of the two can be sprayed with anti-corrosion paint, and after the spraying is completed, the pitch box 2 is fixedly connected to the bottom frame 1. Even if there is a certain gap between the two, since the anti-corrosion paint has spread over the surface of the pitch box 2 and the bottom frame 1, it still has very excellent anti-corrosion performance at the gap. At the same time, the pitch box 2 and the bottom frame 1 are electrically connected with an inter-cabinet grounding device 3, and the bottom frame 1 is provided with a cabinet mounting bolt 5 for mounting the wheel hub and conducting with the wheel hub metal. At the same time, the cabinet mounting bolt 5 is electrically connected to the bottom frame 1 through the cabinet grounding device 4, so as to achieve metal conduction between the pitch box 2 and the wheel hub, and finally the pitch box 2 is electrically grounded.

[0026] It should be noted that the above mentioned split design of the bottom frame 1 and the pitch box 2 allows anti-corrosion paint to be sprayed on the surfaces of all parts of the bottom frame 1 and the pitch box 2, thereby improving the overall anti-corrosion performance of the bottom frame 1 and the pitch box 2.

[0027] The above-mentioned inter-cabinet grounding device 3 includes a first metal plate welded on the pitch box 2 and a second metal plate welded on the bottom frame 1. Since the first metal plate and the second metal plate are both fixed by welding, the first metal plate can be connected to the pitch box 2 body, so that the first metal plate and the pitch box 2 are metal-conductive; similarly, the second metal plate can also be metal-conductive with the bottom frame 1.

[0028] It should be noted that, for the pitch box 2 and the bottom frame 1 corresponding to the welding parts of the first metal plate and the second metal plate, the corresponding positions are not sprayed with anti-corrosion paint, or the anti-corrosion paint is scraped off during the welding process, or after the welding is completed, the pitch box 2 and the bottom frame 1 are subjected to electrophoresis and spraying process to ensure metal conductivity between the first metal plate and the pitch box 2, and metal conductivity between the second metal plate and the bottom frame 1.

[0029] The first metal plate and the second metal plate are both made of stainless steel, and their surfaces are not treated. The thickness of the two metal plates is about 2 mm, and they do not need to bear load or fixation. It is only necessary to ensure that the two metal plates can achieve metal conduction when in contact. In this case, one side of the first metal plate is in contact with one side of the second metal plate, and the contact surface is tightened and fitted by bolts.

[0030] It should be noted that the second metal plate can be arranged on the flange structure of the bottom frame 1 or on the frame body of the bottom frame 1, so as to ensure that the pitch box 2 can be metal-conducted with the bottom frame 1 through the two metal plates.

[0031] In addition, a door lock anti-scratch sheet 6 corresponding to the position of the door lock tongue is arranged inside the pitch box 2. The door lock anti-scratch sheet 6 is made of stainless steel and is provided with a waist-shaped hole. The door lock anti-scratch sheet 6 is adjustably installed on the pitch box 2 by bolts, thereby ensuring that the door lock anti-scratch sheet 6 is in contact with the pitch box 2 and metal conduction is achieved, and the paint film on the surface of the door lock tongue is prevented from rotating and being worn.

[0032] Similarly, the cabinet grounding device 4 is also made of stainless steel, which can have excellent anti-corrosion performance while achieving metal conduction. Referring to Figure 1, the cabinet grounding device 4 is arranged on the protruding part of the flange structure of the bottom frame 1, and is in contact and conduction with the surface of the protruding part; at the same time, the protruding part corresponds to the installation hub, and the cabinet mounting bolt 5 is also located at the protruding part. It should be noted that since the bottom frame 1 as a whole is a metal conduction component, when the cabinet grounding device 4 is metal-conducted with the bottom frame 1, it can naturally be metal-conducted with the pitch box 2 through the inter-cabinet grounding device 3.

[0033] The cabinet mounting bolt 5 is metal-conducted with the cabinet grounding device 4, and the contact surface of the cabinet mounting bolt 5 is metal-conducted with the wheel hub, so that the cabinet grounding device 4 is metal-conducted with the wheel hub; on this basis, the variable pitch box 2 can be metal-conducted with the wheel hub. The metal wheel hub is in turn metal-conducted with the earth through the wind turbine structure, thereby achieving electrical grounding of the variable pitch box 2. Compared with the prior art, in order to ensure the electrical grounding of the variable pitch box 2, a grounding wire is connected to the wheel hub, and because the grounding wire is exposed outside, it is easy to cause damage to the grounding wire, reducing the overall aesthetics of the cabinet. The present application can achieve stable electrical grounding of the variable pitch box 2 in the above manner, and greatly improve the external appearance of the cabinet.

[0034] It should be noted that the pitch box 2 can be fixed to the bottom frame 1 by multiple bolts, so as to realize the detachable connection between the pitch box 2 and the bottom frame 1, thereby ensuring the stability of both. The drive device 7 and the power supply device 8 are installed on the bottom frame 1, and the drive device 7 and the power supply device 8 are located in the pitch box 2, thus constituting the necessary components required by the entire cabinet.

[0035] In general, the present application divides the pitch box 2 and the bottom frame 1 into two independent parts, which are detachably connected by bolts, so that the independent pitch box 2 and the bottom frame 1 can be subjected to electrophoresis and spraying processes, so that each part of the surface of the pitch box 2 and the bottom frame 1 can be sprayed with anti-corrosion paint. The drive device 7 and the power supply device 8 are fixed on the bottom frame 1, and the bottom frame 1 and the pitch box 2 are connected by bolts to ensure that the connection is tight; the pitch box 2 and the bottom frame 1 are metal-conductive through the cabinet inter-grounding device 3 whose surface is not treated, and then the cabinet grounding device 4 whose surface is not treated contacts the bottom frame 1, so as to achieve metal conduction between the bottom frame 1 and the cabinet grounding device 4, and finally the cabinet grounding device 4 contacts the surface of the cabinet mounting bolts 5, so as to achieve metal conduction between the two, so as to achieve metal conduction between the pitch box 2 and the hub, and finally achieve electrical grounding of the pitch box 2.

[0036] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0037] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A split type carbon steel cabinet of a pitch control system, comprising a bottom frame and a pitch box arranged on the bottom frame, characterized in that: The bottom frame and the pitch box are detachably arranged, the surface of the pitch box is sprayed with anti-corrosion paint, an inter-cabinet grounding device is electrically connected between the pitch box and the bottom frame, and the bottom frame is provided with cabinet mounting bolts for mounting the wheel hub and being metal-conducted with the wheel hub, and the cabinet mounting bolts are electrically connected to the bottom frame through the cabinet grounding device.

2. The split type pitch control system carbon steel cabinet according to claim 1 is characterized in that: The pitch box and the bottom frame both adopt an anti-corrosion process of electrophoresis plus spraying, so that the surfaces of each part of the bottom frame and the pitch box are sprayed with anti-corrosion paint.

3. The split type pitch control system carbon steel cabinet according to claim 1 is characterized in that: The inter-cabinet grounding device includes a first metal plate welded on the pitch box and a second metal plate welded on the bottom frame. One side of the first metal plate contacts one side of the second metal plate, and the contact surfaces are tightly fitted by bolts.

4. The split type pitch control system carbon steel cabinet according to claim 3 is characterized in that: The first metal plate and the second metal plate are made of stainless steel.

5. The split type pitch control system carbon steel cabinet according to claim 1 is characterized in that: A door lock anti-scratch sheet corresponding to the position of the door lock tongue is arranged inside the pitch box. The door lock anti-scratch sheet is made of stainless steel and is provided with a waist-shaped hole. The door lock anti-scratch sheet is adjustably mounted on the pitch box by bolts so that the door lock anti-scratch sheet is in contact with the pitch box and metal conduction is achieved.

6. The split type pitch control system carbon steel cabinet according to claim 1 is characterized in that: The cabinet grounding device is made of stainless steel, and after being connected to the bottom frame, the surfaces of the two are in contact and conductive.

7. The split-type pitch control system carbon steel cabinet according to any one of claims 1 to 6, characterized in that: The pitch box is fixedly mounted on the bottom frame by a plurality of bolts.

8. The split type pitch control system carbon steel cabinet according to claim 7 is characterized in that: A driving device and a power supply device are installed on the bottom frame, and the driving device and the power supply device are located in the pitch box.

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