Lightning arrester of wind turbine generator and wind turbine generator

Abstract

The lightning arrester comprises a lightning rod and three groups of supporting assemblies which are uniformly distributed along the circumferential direction of the lightning rod, each group of supporting assembly comprises a supporting frame, a positioning frame, a mounting block and a mounting seat, the lightning rod is provided with a base and a sleeve frame which is arranged above the base, and the positioning frame is arranged on the base. The two ends of the positioning frame are connected to the base and the mounting block correspondingly, the upper end of the supporting frame is connected with the sleeve frame, and the lower end of the supporting frame is connected with the positioning frame. The mounting block comprises a fixing part, a connecting part protruding downwards from the lower end face of the fixing part, a clamping assembly suitable for being matched with the mounting base in a buckled mode, and an operation assembly arranged in the fixing part and connected with the clamping assembly, so that the connecting part is detachably embedded into the connecting cavity through buckle matching. Through the installation block and the installation seat which are mutually clamped, the lightning arrester can be conveniently detached from a unit for maintenance operation and can be rapidly installed after the maintenance operation is completed, and the dismounting operation is efficient and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a lightning protection device for a wind turbine set and a wind turbine set. Background Art

[0002] Wind power generation refers to converting the kinetic energy of wind into mechanical kinetic energy, and then converting mechanical energy into electrical energy. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through the speed increaser to drive the generator to generate electricity. Wind turbines are usually installed in places with sufficient wind energy, such as ridges or open plains. Usually, because the propellers and cabin structures of wind turbines are very high, this high-altitude location is extremely susceptible to lightning strikes. Therefore, in order to ensure the working stability of wind power generation facilities, lightning protection devices are needed to provide protection for the units.

[0003] CN218669681U discloses a lightning arrester for a wind turbine generator set, comprising a wind turbine generator body and a lightning arrester, wherein the lightning arrester is fixedly installed on the top of the wind turbine generator body, the wind turbine generator body and the lightning arrester are connected, the bottom of the lightning arrester is connected to a concrete foundation through a base, the concrete foundation is connected to a pre-buried grounding grid, and the lightning arrester is connected to the grounding grid through a grounding lead. In general, although the structure can perform lightning protection work normally, there are certain defects. In combination with its structural form, its base is a fixed structure, which is installed on the top of the entire wind turbine generator cabin, and the function is to position and fix the entire lightning rod bracket structure, and its lightning rod bracket structure is fixedly installed on this base by screws. The form of screw fixing, with long-term use and rain erosion, is prone to rust, resulting in inconvenience in subsequent disassembly and maintenance work; and in the high altitude, the wind force has a large driving force on the entire bracket, and the wind force will reciprocate to produce a thrust effect on the bracket, forming a vibration effect, which is very easy to cause the screw to loosen, resulting in a decrease in the stability of the structure, and the safety needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to provide a lightning protection device for a wind turbine.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes the following technical solution: a lightning protection device for a wind turbine. The lightning protection device comprises a lightning rod and three groups of support components evenly distributed along the circumference of the lightning rod, each group of support components comprises a support frame, a positioning frame, a mounting block and a mounting seat, the lightning rod is installed with a base and a sleeve frame located above the base, the two ends of the positioning frame are respectively connected to the base and the mounting block, the upper end of the support frame is connected to the sleeve frame, and the lower end is connected to the positioning frame, wherein:

[0006] A connecting cavity is provided at the top of the mounting seat, and the mounting block includes a fixing portion, a connecting portion protruding downward from the lower end surface of the fixing portion, a snap-fitting assembly suitable for snap-fitting with the mounting seat, and an operating assembly arranged in the fixing portion and connected to the snap-fitting assembly, so that the connecting portion can be detachably embedded in the connecting cavity through snap-fitting.

[0007] Furthermore, the mounting seat is provided with a slot extending radially outward from the cavity wall of the connecting cavity, the mounting block is provided with a accommodating cavity, the clamping assembly includes a spring and a pressure plate arranged in the accommodating cavity, the inner side of the pressure plate is connected to the spring, and the outer side of the pressure plate is provided with a clamping block matching the slot.

[0008] Furthermore, the operating assembly includes an operating rod and an operating plate, one end of the operating rod is fixedly connected to the outer side of the pressure plate, and the other end of the operating rod is fixedly connected to the inner side of the operating plate.

[0009] Furthermore, the side wall surface of the fixing portion is provided with an operating recess matching the operating plate, and the operating plate is slidably connected to the operating recess.

[0010] Furthermore, the fixing portion includes a baffle plate disposed between the operating recess and the accommodating cavity, and the baffle plate is provided with a through hole for the operating rod to pass through.

[0011] Furthermore, the bottom surface of the clamping block is an inclined surface that is inclined upward in a direction away from the pressing plate.

[0012] Furthermore, the mounting block includes a partition and two groups of snap-fit ​​components and two groups of operating components symmetrically arranged on both sides of the partition, the springs and pressure plates of the two groups of snap-fit ​​components are respectively located in two accommodating cavities separated by the partition, and the mounting seat is correspondingly provided with two slots.

[0013] Furthermore, two opposite side wall surfaces of the fixing portion are respectively provided with operating recesses matching the operating plate, and the operating plate is slidably connected to the operating recesses.

[0014] Furthermore, the sleeve frame includes three first positioning blocks evenly distributed along the circumferential direction and arranged on the outer surface, and the positioning frame of each group of support components is respectively sleeved with a second positioning block, the upper end of the support frame is hinged to the first positioning block, and the lower end of the support frame is hinged to the second positioning block.

[0015] The utility model also provides a wind turbine generator set, which comprises the above-mentioned lightning protection device.

[0016] The lightning protection device of the wind turbine set of the utility model can be easily disassembled from the unit for inspection and maintenance by manually operating the fixing part above the mounting seat through the mounting block and the mounting seat that are mutually clamped. After the maintenance operation is completed, the connecting part is embedded into the connecting cavity of the mounting seat through snap fit to realize rapid installation of the device. The maintenance personnel do not need to use disassembly and assembly tools, and the disassembly and assembly operations are efficient and convenient. The inconvenience of maintenance due to rust of the threaded connector can be avoided, thereby improving the safety and convenience of use. The three groups of support components constitute a complete triangular support structure, which can provide stable support for the lightning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the device and principle of the present invention. In the drawings,

[0018] Figure 1 This is a schematic diagram of the overall structure of the lightning protection device of an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection between the mounting block and the mounting seat of the lightning protection device according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1. Lightning rod; 11. Base; 12. Frame; 121. Articulated block;

[0022] 2. Support frame;

[0023] 3. Positioning frame; 31. Positioning block;

[0024] 4. Mounting block; 41. Fixing portion; 411. Operating recess; 412. Baffle; 42. Connecting portion; 43. Snap-fit ​​assembly; 431. Spring; 432. Pressure plate; 433. Block; 44. Operating assembly; 441. Operating lever; 442. Operating panel; 45. Accommodating cavity; 46. Partition; 5. Mounting seat; 51. Connecting cavity; 52. Slot; 53. Mounting hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only preferred embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be understood that, unless otherwise defined, the technical and scientific terms used herein are the same as those generally understood by those skilled in the art of the technical field of the present invention. The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. Terms such as "parts" and "pieces" that appear in this article can represent both single parts and combinations of multiple parts. The singular forms of "one", "one" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. Ordinal numbers such as "first" and "second" are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". When the terms "comprising" and / or "including" are used in this specification, it indicates that the features, wholes, steps, operations, elements and / or components are present, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "rear", "left", "right", "inside", "outside", "center", "vertical", "horizontal" and similar expressions are for illustrative purposes only and are not restrictive. The terms "connected", "installed", "connected", and "set" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The features described in this document in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0027] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and are not intended to limit the present invention.

[0028] The utility model provides a lightning protection device for a wind turbine. Figure 1 and Figure 2As shown, the lightning arrester comprises a lightning rod 1 and three groups of support components evenly distributed along the circumference of the lightning rod 1. The lightning rod 1 contacts the ground through a grounding wire. Each group of support components comprises a support frame 2, a positioning frame 3, a mounting block 4 and a mounting seat 5. The lightning rod 1 is provided with a base 11 and a sleeve frame 12 located above the base 11. The two ends of the positioning frame 3 are respectively connected to the base 11 and the mounting block 4. The upper end of the support frame 2 is connected to the sleeve frame 12, and the lower end is connected to the positioning frame 3. Among them, a connecting cavity 51 is provided at the top of the mounting seat 5. The mounting block 4 comprises a fixing portion 41, a connecting portion 42 protruding downward from the lower end surface of the fixing portion 41, a snap-fitting assembly 43 suitable for snap-fitting with the mounting seat 5, and an operating assembly 44 arranged in the fixing portion 41 and connected to the snap-fitting assembly 43, so that the connecting portion 42 is detachably embedded in the connecting cavity 51 through snap-fitting.

[0029] The lightning protection device of the utility model can conveniently remove the entire device except the mounting seat from the unit for inspection and maintenance by manually operating the fixing part above the mounting seat through the mounting block and the mounting seat that are interlocked with each other, and after the maintenance operation is completed, the connecting part is embedded into the connecting cavity of the mounting seat through snap fit to realize rapid installation of the device. The maintenance personnel do not need to use disassembly and assembly tools, and the disassembly and assembly operation is efficient and convenient; it can avoid the inconvenience of inspection and maintenance due to rust of the threaded connecting parts, thereby improving the safety and convenience of use.

[0030] According to the embodiment of the utility model, the mounting seat 5 is provided with a slot 52 extending radially outward from the cavity wall of the connecting cavity 51, the mounting block 4 is provided with a receiving cavity 45, and the clamping assembly 43 includes a spring 431 and a pressure plate 432 arranged in the receiving cavity 45, the inner side of the pressure plate 432 is connected to the spring 431, and the outer side of the pressure plate 432 is provided with a clamping block 433 matching the slot 52. By arranging the spring 431 in the receiving cavity 45 of the mounting block 4, the spring 431 can be compressed during the process of installing the mounting block 4 into the mounting seat 5, so that the clamping block 433 is contracted into the connecting portion 42, so that the connecting portion 42 is plugged into the connecting cavity 51 of the mounting seat 5, and when the connecting portion 42 completely enters the connecting cavity 51, the spring 431 is reset under the action of the restoring force, so that the clamping block 433 is pushed into the slot 52, so as to realize the snap-fit ​​connection between the mounting block 4 and the mounting seat 5. Preferably, the bottom surface of the clamping block 433 is an inclined surface that is inclined upward in a direction away from the pressing plate 432. During installation, the lower end of the connecting portion 42 is aligned with the connecting cavity 51 of the mounting seat 5 and pressed downward, and the inclined bottom surface of the clamping block 433 touches the inner wall of the opening of the connecting cavity 51, so that the clamping block 433 generates a component force that compresses the spring inward due to the compression of the inclined bottom surface, slides inward and contracts, and pushes the pressing plate 432 to compress the spring 431, thereby completing the above-mentioned positioning installation.

[0031] According to an embodiment of the utility model, the operating assembly 44 includes an operating rod 441 and an operating plate 442, one end of the operating rod 441 is fixedly connected to the outer side of the pressure plate 432, and the other end of the operating rod 441 is fixedly connected to the inner side of the operating plate 442. Providing an operating plate 442 with a larger force area than the operating rod 441 can improve the convenience and stability of the pressing operation of the clamping assembly, and the maintenance personnel can more easily remove the mounting block 4 from the mounting seat 5 by pressing the operating plate 442 to compress the spring 431. Preferably, the side wall surface of the fixed portion 41 of the mounting block 4 is provided with an operating recess 411 that matches the operating plate 442, and the operating plate 442 is slidably connected to the operating recess 411. The built-in operating plate 442 in the operating recess 411 makes the structure safer and more reliable, and can avoid misoperation caused by external forces.

[0032] According to an embodiment of the utility model, the fixing block 41 of the mounting block 4 includes a baffle 412 disposed between the operating recess 411 and the accommodating chamber 45, and the baffle 412 is provided with a through hole for the operating rod 441 to pass through. Further, the mounting block 4 includes a partition 46 and two groups of clamping components 43 and two groups of operating components 44 symmetrically disposed on both sides of the partition 46, and the springs 431 and the pressure plates 432 of the two groups of clamping components 43 are respectively located in the two accommodating chambers 45 separated by the partition 46, and the mounting seat 5 is provided with two clamping grooves 52 matching the two clamping blocks 433. Correspondingly, the two opposite side wall surfaces of the fixing portion 41 are respectively provided with operating recesses 411 matching the operating plates 442, and the two operating plates 442 are respectively slidably connected in their respective operating recesses 411. Two groups of snap-fit ​​components 43 and two groups of operating components 44 are set symmetrically distributed about the partition 46. When the mounting block 4 is installed on the mounting seat 5, the two clamping blocks 433 slide toward the partition 46 respectively due to their respective inclined bottom surfaces, thereby driving the two pressure plates 432 to compress the springs 431 on both sides of the partition 412, so that the mounting block is subjected to balanced force. The installation can be successfully completed by simply pressing the mounting block 4 in the vertical downward direction; when dismantling and maintenance is required, the operator simultaneously presses the operating plates 442 on the opposite sides of the fixed block 41 to make the clamping block 433 disengage from the slot 52 and pull out the connecting part 42 upward to complete the dismantling of the mounting block 4.

[0033] According to the embodiment of the utility model, the sleeve frame 12 includes three hinge blocks 121 arranged on the outer peripheral surface and evenly distributed along the circumferential direction, and the positioning frame 3 of each group of support components is respectively sleeved with a positioning block 31, the upper end of the support frame 2 is hinged to the hinge block 121, and the lower end of the support frame 2 is hinged to the positioning block 31. The three groups of support components constitute a complete triangular support structure, which can stably support the lightning rod.

[0034] like Figure 1As described above, the mounting seat 5 is provided with mounting holes 53 at the four corners, respectively, for pre-positioning and mounting the mounting seat 5 on the top of the nacelle of the wind turbine by bolts. After the mounting seat 5 is installed, the lightning rod 1, the support frame 2, the positioning frame 3 and the mounting block 4 can be connected to the mounting seat 5 as a whole according to the above operation, so as to realize the positioning and installation of the lightning rod 1. When maintenance operation is required, the operating plate 442 is pressed to make the clamping block 433 disengage from the clamping slot 52 and the connecting part 42 is pulled out upward to complete the removal of the mounting block 4, and then the subsequent maintenance work can be carried out.

[0035] The utility model has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalent scope.

Claims

1. A lightning protection device for a wind turbine generator, comprising a lightning rod (1) and three groups of supporting components evenly distributed along the circumference of the lightning rod (1), characterized in that: Each group of supporting components comprises a supporting frame (2), a positioning frame (3), a mounting block (4) and a mounting seat (5); the lightning rod (1) is provided with a base (11) and a sleeve frame (12) located above the base (11); the two ends of the positioning frame (3) are respectively connected to the base (11) and the mounting block (4); the upper end of the supporting frame (2) is connected to the sleeve frame (12), and the lower end is connected to the positioning frame (3); wherein: A connecting cavity (51) is provided at the top of the mounting seat (5), and the mounting block (4) comprises a fixing portion (41), a connecting portion (42) protruding downward from the lower end surface of the fixing portion (41), a snap-fitting assembly (43) suitable for snap-fitting with the mounting seat (5), and an operating assembly (44) arranged in the fixing portion (41) and connected to the snap-fitting assembly (43), so that the connecting portion (42) can be detachably embedded in the connecting cavity (51) by snap-fitting.

2. The lightning protection device according to claim 1, characterized in that: The mounting seat (5) is provided with a slot (52) extending radially outward from the cavity wall of the connecting cavity (51); a receiving cavity (45) is provided in the mounting block (4); the clamping assembly (43) comprises a spring (431) and a pressure plate (432) arranged in the receiving cavity (45); the inner side of the pressure plate (432) is connected to the spring (431); and the outer side of the pressure plate (432) is provided with a clamping block (433) matching the slot (52).

3. The lightning protection device according to claim 2, characterized in that: The operating assembly (44) comprises an operating rod (441) and an operating plate (442), one end of the operating rod (441) is fixedly connected to the outer side of the pressing plate (432), and the other end of the operating rod (441) is fixedly connected to the inner side of the operating plate (442).

4. The lightning protection device according to claim 3, characterized in that: An operating recess (411) matching the operating plate (442) is provided on the side wall surface of the fixing portion (41), and the operating plate (442) is slidably connected in the operating recess (411).

5. The lightning protection device according to claim 4, characterized in that: The fixing portion (41) comprises a baffle (412) arranged between the operating recess (411) and the accommodating cavity (45), and the baffle (412) is provided with a through hole for the operating rod (441) to pass through.

6. The lightning protection device according to claim 2, characterized in that: The bottom surface of the clamping block (433) is an inclined surface that tilts upward in a direction away from the pressing plate (432).

7. The lightning protection device according to claim 2, characterized in that: The mounting block comprises a partition (46) and two groups of snap-fit ​​assemblies (43) and two groups of operating assemblies (44) symmetrically arranged on both sides of the partition (46); the springs (431) and the pressure plates (432) of the two groups of snap-fit ​​assemblies (43) are respectively located in two accommodating cavities (45) separated by the partition (46); and the mounting seat (5) is correspondingly provided with two snap-fit ​​grooves (52).

8. The lightning protection device according to claim 7, characterized in that: Two opposite side wall surfaces of the fixing portion (41) are respectively provided with operating recesses (411) matching the operating assembly (44), and the operating assembly (44) is slidably connected in the operating recesses (411).

9. The lightning protection device according to any one of claims 1 to 8, characterized in that: The sleeve frame (12) comprises three hinge blocks (121) arranged on the outer peripheral surface and evenly distributed in the circumferential direction, the positioning frame (3) of each group of support components is respectively sleeved with a positioning block (31), the upper end of the support frame (2) is hinged to the hinge block (121), and the lower end of the support frame (2) is hinged to the positioning block (31).

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the lightning protection device according to any one of claims 1-9.

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