Novel clearance radar

Abstract

The utility model relates to the technical field of safety detection of wind driven generators, in particular to a novel clearance radar which comprises a shell assembly, and three sets of optical modules are installed at the top end of a bottom shell. The clearance radar is small and exquisite in structure and convenient to install and use; the clearance radar utilizes the light beam of the laser head to observe and calibrate the position of the zero degree, so that the three beams of the optical module can be in the correct working position, the light beam of the laser head is visible light, the three beams of the optical module are invisible light, and the light beam of the laser head is vertically parallel to the first beam and perpendicular to the lower end face of the base. The included angle between the first beam and the second beam is 2 degrees, the included angle between the first beam and the third beam is 4 degrees, the position of the first beam can be known by adjusting the position of the beam of the visible light laser head, the zero-degree position verification is more visual, meanwhile, the levelness adjustment convenience is improved through a leveling mechanism arranged on the laser head, and the sealing effect is better through cooperation with a sealing frame. And the sealing effect during adjustment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine safety detection, in particular to a novel clearance radar. Background Art

[0002] The tower clearance of a wind turbine generator set is the shortest distance between the blade tip of the turbine and the tower wall at the blade tip height. The clearance radar is a range-finding radar that monitors the blade tip clearance distance in real time. It directly obtains the blade distance measurement value when the wind turbine blade is triggered to three different positions, and indirectly obtains the blade tip clearance distance calculated based on the three blade distance measurement values. When the calculated blade tip clearance value is close to the specified minimum clearance value, the wind turbine master control can immediately take protective measures, such as deceleration and blade retraction.

[0003] The existing clearance radar is large in size, which is inconvenient to install and use. In addition, the existing clearance radar uses camera observation to determine the position of the three beams of the optical module. The three beams will be disturbed during the day, and because the wind tower is relatively high, the brightness of the light spot irradiated to the ground is very weak and not easy to see, which will lead to the lack of intuitiveness when measuring distance. At the same time, the existing clearance radar is more cumbersome when adjusting the angle, and it needs to use external tools to rotate the operation when adjusting, which brings great trouble to people's use. In addition, the existing clearance radar lens heating is heated by PI heating film, and the heating film heating is often directly attached to the end face of the optical module. The heat is easily absorbed by the casing, and the heat conducted to the window piece is very small. The defogger and defrost ability is poor, and the heat will also be conducted to the optical module. The optical module is very sensitive to heat, and high temperature will cause deviations in the received information. Utility Model Content

[0004] The utility model aims to provide a novel clearance radar to solve the problems in the above-mentioned background technology that the existing clearance radar is large in size, inconvenient to install and use, and complicated in angle adjustment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of clearance radar, including a shell assembly, the shell assembly is composed of a shell body, a top cover and a bottom shell, the upper and lower ends of the shell body are respectively fixed with the top cover and the bottom shell by screws, and a PCB board is installed inside the shell body by screws; a base is provided at the bottom of the bottom shell, and adjustment is achieved between the base and the bottom shell by a leveling mechanism; three groups of annular heating ceramic plates are fixed inside the bottom shell, and the annular heating ceramic plates are used for removing fog and frost, and an insulating pad is installed between the annular heating ceramic plates and the bottom shell, and the bottom of the bottom shell is respectively inlaid with a window plate, a first beam filter, a second beam filter and a third beam filter in sequence, and three groups of optical modules are installed on the top of the bottom shell, and the optical modules are used to detect the operation of the power generation fan blades; a laser head adjustment mechanism is also installed at one end of the bottom shell.

[0006] Preferably, three groups of connectors are fixed to the top of the top cover, and the bottom ends of the connectors extend into the interior of the shell body and are electrically connected to the PCB board.

[0007] Preferably, a sealing frame is fixed on the surface of the base, and the top end of the sealing frame is sleeved on the outer surface of the bottom of the bottom shell, and the sealing frame is used for sealing between the base and the bottom shell.

[0008] Preferably, the leveling mechanism is composed of a handle, a ball screw, a mounting block, a mounting slot and a ball slot, and the handle is provided in three groups, and the three groups of handles are threadedly connected to the surface of the bottom shell.

[0009] Preferably, three groups of mounting grooves are provided on the surface of the base, and ball grooves are opened inside the mounting grooves, mounting blocks are fixed inside the mounting grooves by screws, and the bottom end of the handle passes through the bottom shell and the mounting block in sequence and is inlaid with a ball screw, and the ball screw is hinged inside the ball groove.

[0010] Preferably, the laser head adjustment mechanism is composed of a high-power laser head, a laser head mounting seat and an O-shaped adjustment pad, and the high-power laser head is arranged on the surface of the bottom shell.

[0011] Preferably, a laser head mounting seat is fixedly mounted on the surface of the high-power laser head, and three sets of O-shaped adjustment pads are arranged between the laser head mounting seat and the bottom shell, and the laser head mounting seat is threadedly fixedly connected to the surface of the bottom shell by three screws penetrating the O-shaped adjustment pads.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the new clearance radar is provided with a leveling mechanism and a laser head adjustment mechanism; when implemented, by rotating the handle, the ball screw at the bottom of the handle will move inside the ball groove, and will be fastened and locked by the mounting block during movement, thereby achieving the adjustment of the horizontal degree of the bottom shell, and the sealing of any state can be achieved through the work of the sealing frame during leveling; at the same time, when installing a high-power laser head, it can also be leveled by rotating the screw with an O-shaped adjustment pad. The clearance radar of the utility model has a compact structure and is relatively convenient to install and use; and the clearance radar uses the light beam of the laser head to observe and calibrate the position of the zero point, so that the three beams of the optical module can be in the correct working position, making it more intuitive to adjust the three beams, and at the same time, the leveling mechanism set by the laser head increases the convenience of adjusting the horizontal degree, and combined with the sealing frame, the sealing effect during adjustment is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional upright state structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the three-dimensional inverted state structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the upright partial explosion structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the inverted partial explosion structure of the utility model;

[0017] Figure 5 It is a schematic diagram of the positive explosion amplification structure of the utility model.

[0018] In the figure: 1. Shell assembly; 11. Shell body; 111. PCB board; 12. Top cover; 121. Connector; 13. Bottom shell; 130. Thermal insulation pad; 131. Ring-shaped heating ceramic plate; 2. Base; 21. Sealing frame; 3. Leveling mechanism; 31. Handle; 32. Ball screw; 33. Mounting block; 34. Mounting slot; 35. Ball slot; 4. Optical module; 5. Laser head adjustment mechanism; 51. High-power laser head; 52. Laser head mounting seat; 53. O-type adjustment pad; 511. Window piece; 512. First beam filter; 513. Second beam filter; 514. Third beam filter. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "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. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] The utility model provides a novel clearance radar having a structure as follows Figure 1 as well as Figure 5As shown, the housing assembly 1 includes a housing body 11, a top cover 12 and a bottom housing 13. The top cover 12 and the bottom housing 13 are fixed to the upper and lower ends of the housing body 11 by screws respectively. A PCB board 111 is installed inside the housing body 11 by screws. Three groups of connectors 121 are fixed to the top of the top cover 12, and the bottom ends of the connectors 121 extend to the inside of the housing body 11 and are electrically connected to the PCB board 111. A base 2 is provided at the bottom of the bottom housing 13, and the base 2 and the bottom housing 13 are adjusted by a leveling mechanism 3. A sealing frame 21 is fixed to the surface of the base 2, and the top end of the sealing frame 21 is sleeved on the outer surface of the bottom of the bottom housing 13. The sealing frame 21 is used for sealing between the base 2 and the bottom housing 13.

[0021] The clearance radar of the present invention has a compact structure and is convenient to install and use. Moreover, the clearance radar uses the observation of a laser head to determine the position of the blades, which can realize alarm operation and make distance measurement more intuitive. At the same time, the leveling mechanism 3 is provided to increase the convenience of adjusting the horizontality, and the sealing frame 21 is used to ensure the sealing effect during adjustment.

[0022] Furthermore, if Figure 2 as well as Figure 5 As shown, the leveling mechanism 3 is composed of a handle 31, a ball screw 32, a mounting block 33, a mounting groove 34 and a ball groove 35. The handle 31 is provided with three groups, and the three groups of handles 31 are threadedly connected to the surface of the bottom shell 13. The surface of the base 2 is provided with three groups of mounting grooves 34, and the inside of the mounting grooves 34 is provided with ball grooves 35. The inside of the mounting grooves 34 is fixed with mounting blocks 33 by screws. The bottom end of the handle 31 sequentially penetrates the bottom shell 13 and the mounting block 33 and is inlaid with a ball screw 32, and the ball screw 32 is hinged inside the ball groove 35; three groups of annular heating ceramics are fixed inside the bottom shell 13 Ceramic piece 131, the annular heating ceramic piece 131 is used for removing fog and frost, and an insulating pad 130 is installed between the annular heating ceramic piece 131 and the bottom shell 13, and the insulating pad 130 is used for heat insulation of the bottom shell 13, and the bottom of the bottom shell 13 is respectively inlaid with a window piece 511, a first beam filter 512, a second beam filter 513 and a third beam filter 514, and the window piece 511, the first beam filter 512, the second beam filter 513 and the third beam filter 514 are respectively connected to the annular heating ceramic piece 131 through silica gel.

[0023] During implementation, by rotating the handle 31, the ball screw 32 at the bottom of the handle 31 will move inside the ball groove 35, and will be fastened and locked by the mounting block 33 during movement, thereby achieving the adjustment of the horizontal level of the bottom shell 13.

[0024] Furthermore, if Figure 3 , Figure 4 as well as Figure 5As shown, three groups of optical modules 4 are installed on the top of the bottom shell 13, and the optical modules 4 are used to detect the operation of the power generation fan blades; a laser head adjustment mechanism 5 is also installed at one end of the bottom shell 13, and the laser head adjustment mechanism 5 is composed of a high-power laser head 51, a laser head mounting seat 52 and an O-type adjustment pad 53. The high-power laser head 51 is arranged on the surface of the bottom shell 13, and the laser head mounting seat 52 is fixed on the surface of the high-power laser head 51, and three groups of O-type adjustment pads 53 are arranged between the laser head mounting seat 52 and the bottom shell 13, and the laser head mounting seat 52 is threadedly fixed to the surface of the bottom shell 13 by three screws penetrating the O-type adjustment pad 53.

[0025] During implementation, the blades of the generator will be detected by the three groups of light modules 4 in sequence when they are offset. When detected by the first light module 4 on the outermost side, an alarm will be issued through the high-power laser head 51 to notify personnel to make adjustments. In special cases, if the innermost light module 4 detects the blades, the generator will be shut down to protect the blades. At the same time, when the high-power laser head 51 is installed, it can also be leveled by rotating the screw in conjunction with the O-shaped adjustment pad 53.

[0026] Working principle: When in use, first install the clearance radar, and then level it through the leveling mechanism 3. When the leveling mechanism 3 is implemented, by rotating the handle 31, the ball screw 32 at the bottom of the handle 31 will move inside the ball groove 35, and it will be fastened and locked by the mounting block 33 during movement, so as to adjust the horizontal degree of the bottom shell 13. When leveling, the sealing frame 21 can be used to achieve sealing in any state; at the same time, when the high-power laser head 51 is installed, it can also be leveled by rotating the screw with the O-type adjustment pad 53.

[0027] When the clearance radar is in use, the blades of the generator will be detected by the three groups of light modules 4 in sequence when they are offset. When detected by the first light module 4 on the outermost side, an alarm will be issued through the high-power laser head 51 to notify personnel to make adjustments. In special circumstances, if the innermost light module 4 detects the blades, the generator will be shut down, thereby protecting the blades and finally completing the use of the clearance radar.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A novel clearance radar, comprising a housing assembly (1), characterized in that: The housing assembly (1) is composed of a housing (11), a top cover (12) and a bottom housing (13); the top cover (12) and the bottom housing (13) are fixed to the upper and lower ends of the housing (11) by screws respectively; a PCB board (111) is installed inside the housing (11) by screws; a base (2) is arranged at the bottom of the bottom housing (13), and the base (2) and the bottom housing (13) are adjusted by a leveling mechanism (3); three groups of annular heating ceramic sheets (131) are fixed inside the bottom housing (13); the annular heating ceramic sheets (131) are fixed to the bottom housing (13); 31) is used for removing fog and frost, a heat insulation pad (130) is installed between the annular heating ceramic plate (131) and the bottom shell (13), the bottom of the bottom shell (13) is respectively inlaid with a window plate (511), a first beam filter (512), a second beam filter (513) and a third beam filter (514), and three groups of optical modules (4) are installed on the top of the bottom shell (13), and the optical modules (4) are used to detect the operation of the power generation fan blades; a laser head adjustment mechanism (5) is also installed at one end of the bottom shell (13).

2. A novel clearance radar according to claim 1, characterized in that: Three groups of connectors (121) are fixed on the top of the top cover (12), and the bottom ends of the connectors (121) extend into the interior of the shell body (11) and are electrically connected to the PCB board (111).

3. A novel clearance radar according to claim 1, characterized in that: A sealing frame (21) is fixed on the surface of the base (2), and the top end of the sealing frame (21) is sleeved on the outer surface of the bottom of the bottom shell (13). The sealing frame (21) is used for sealing between the base (2) and the bottom shell (13).

4. The novel clearance radar according to claim 1 is characterized in that: The leveling mechanism (3) is composed of a handle (31), a ball screw (32), a mounting block (33), a mounting groove (34) and a ball groove (35). The handle (31) is provided in three groups, and the three groups of handles (31) and the ball screw (32) are connected to the surface of the bottom shell (13).

5. The novel clearance radar according to claim 4 is characterized in that: The surface of the base (2) is provided with three groups of mounting grooves (34), and the mounting grooves (34) are provided with ball grooves (35) inside. The mounting grooves (34) are fixed with mounting blocks (33) inside by screws. The bottom end of the handle (31) passes through the bottom shell (13) and the mounting block (33) in sequence and is inlaid with a ball screw (32), and the ball screw (32) is hinged inside the ball groove (35).

6. The novel clearance radar according to claim 1 is characterized in that: The laser head adjustment mechanism (5) is composed of a high-power laser head (51), a laser head mounting seat (52) and an O-shaped adjustment pad (53); the high-power laser head (51) is arranged on the surface of the bottom shell (13).

7. The novel clearance radar according to claim 6 is characterized by: A laser head mounting seat (52) is fixedly mounted on the surface of the high-power laser head (51), and three groups of O-shaped adjustment pads (53) are arranged between the laser head mounting seat (52) and the bottom shell (13), and the laser head mounting seat (52) is threadedly fixedly connected to the surface of the bottom shell (13) by three screws penetrating the O-shaped adjustment pads (53).

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