An opening and closing device for the cover plate of the hoisting opening of a fan nacelle

Abstract

The present invention discloses an opening and closing device for a cover plate of a hoisting opening in a fan nacelle, which includes a main body assembly, comprising a platform at the bottom of the nacelle, a hoisting opening, a cover plate, a set of protective railings, and a retaining wall; and a safe opening and closing assembly, including a driving member, a linkage control member, a locking member, a warning member, and an opening and closing member. The beneficial effects of the present invention are that the driving member can be used to remotely control the two-way opening and closing of the cover plate of the hoisting opening at any time and anywhere, and the cover plate will not be locked after failure. It is also possible to manually rotate two sets of rotating handles simply on both the inside and outside of the cover plate of the hoisting opening to urgently open and close the cover plate of the hoisting opening bidirectionally. In addition, the warning member can be used to inform the staff of the state change of the cover plate of the hoisting opening in real time, and the locking member can stably maintain the two states of opening and closing of the cover plate of the hoisting opening within a certain period of time.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to an opening and closing device for a cover plate of a hoisting opening of a fan nacelle. Background Art

[0002] Regular inspection of the fan nacelle is necessary to ensure safety, prevent failures, improve performance, extend lifespan, and conduct data analysis and optimization. Inspections can promptly detect and solve problems, ensuring the normal operation and efficient power generation of the fan; the main inspection methods include manual visual inspection, unmanned aerial vehicle (UAV) inspection, remote sensing technology inspection, and data collection and analysis. Among them, remote sensing technology inspection and data collection and analysis are costly, highly specialized, and difficult to operate;

[0003] However, the most commonly used visual inspection and UAV inspection involve the need for personnel and UAVs to enter the interior of the nacelle. The fan nacelle is usually located at a high altitude or in a difficult-to-reach location. There is a hoisting opening above the nacelle. The hoisting opening is not only a hoisting passage for the hoisting wire rope of the crane and an inspection and maintenance passage, but also an escape opening in case of a fire in the fan. During the maintenance process of the fan, fires have caused a high proportion of deaths in the wind power industry. The prior art can be controlled automatically and manually, but in the former case, once it fails, it is very likely that the cover plate will be locked and unable to be opened. In the latter case, the operation is complicated, wasting time and energy. In addition, there is no warning device specifically set for the opening and closing of the cover plate of the hoisting opening, resulting in that the staff cannot accurately judge whether the cover plate of the hoisting opening is fully opened and closed and remains stable. This not only wastes time, but also greatly increases the risk of losing the best escape opportunity in case of an emergency. Moreover, for safety considerations and convenient operation, the cover plate of the hoisting opening needs to be opened bidirectionally;

[0004] Therefore, it is necessary to design an opening and closing device for a cover plate of a hoisting opening of a fan nacelle that can remotely control the bidirectional opening and closing of the cover plate of the hoisting opening at any time and will not lock the cover plate in case of failure, can also manually and emergently open and close the cover plate of the hoisting opening bidirectionally on both the inside and outside of the cover plate of the hoisting opening, and can also inform the staff of the state change of the cover plate of the hoisting opening in real time and stably maintain the two states of opening and closing of the cover plate of the hoisting opening for a certain period of time. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above or prior art, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide an opening and closing device for the cover plate of the hoisting opening of a fan nacelle, which solves the technical problems in the prior art that it is impossible to effectively combine remote control and manual opening and closing of the cover plate of the hoisting opening, and to open and close the cover plate of the hoisting opening emergently in both directions, nor can it inform the staff of the state change of the cover plate of the hoisting opening in real time and stably maintain the opening and closing states of the cover plate of the hoisting opening for a certain period of time.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: An opening and closing device for the cover plate of the hoisting opening of a fan nacelle, which includes a main body assembly, including a platform at the bottom of the nacelle, a hoisting opening provided on the platform at the bottom of the nacelle, a cover plate provided on the hoisting opening, a guard rail group provided on one side of the cover plate, and a retaining wall provided on one side of the guard rail group;

[0009] A safety opening and closing assembly, including a driving member provided on one side of the cover plate, a control member provided on one side of the driving member, a locking member provided on one side of the driving member, a warning member provided on one side of the locking member, and an opening and closing member provided on one side of the cover plate.

[0010] As a preferred solution of the opening and closing device for the cover plate of the hoisting opening of the fan nacelle of the present invention, wherein: The driving member includes a driving motor, a threaded rod provided on one side of the driving motor, a limit ring provided on one side of the threaded rod, a sector turntable provided on one side of the threaded rod, and a rack provided on one side of the sector turntable; The sector turntable includes a special-shaped sliding groove provided thereon.

[0011] As a preferred solution of the opening and closing device for the cover plate of the hoisting opening of the fan nacelle of the present invention, wherein: The driving member further includes a gear disk provided on one side of the sector turntable, a first gear provided on one side of the gear disk, and a second gear provided on one side of the gear disk.

[0012] As a preferred solution of the opening and closing device for the cover plate of the hoisting opening of the fan nacelle of the present invention, wherein: The control member includes a sprocket provided on one side of the gear disk, a chain provided on one side of the sprocket, a first connecting shaft provided on one side of the sprocket, and a first rotating handle penetrating through the first connecting shaft. ]>

[0013] As a preferred solution of the opening and closing device for the cover plate of the hoisting opening of the fan nacelle of the present invention, wherein: The locking member includes a fixed rod provided on one side of the retaining wall, a first telescopic sleeve provided on one side of the fixed rod, a first telescopic rod provided on one side of the first telescopic sleeve, a first spring provided on one side of the first telescopic rod, and a special-shaped locking block provided on one side of the first spring.

[0014] As a preferred solution for the opening and closing device of the cover plate of the hoisting opening in the fan nacelle of the present invention, wherein: the warning member includes a touch rod disposed on one side of the special-shaped chute, a second spring disposed on one side of the touch rod, a hammer head disposed on one side of the second spring, a cavity disposed on one side of the hammer head, a hinge rod disposed on one side of the hammer head, and a fixed block disposed on one side of the hinge rod; the touch rod includes a convex block disposed on one side thereof.

[0015] As a preferred solution for the opening and closing device of the cover plate of the hoisting opening in the fan nacelle of the present invention, wherein: the opening and closing member includes a second rotating handle disposed on one side of the first rotating handle, a second connecting shaft disposed on one side of the second rotating handle, first connecting rods disposed on both sides of the second connecting shaft, second connecting rods disposed on one side of the first connecting rods, and third connecting rods disposed on one side of the second connecting rods.

[0016] As a preferred solution for the opening and closing device of the cover plate of the hoisting opening in the fan nacelle of the present invention, wherein: the first connecting shaft includes a second telescopic sleeve, a second telescopic rod disposed on one side of the second telescopic sleeve, and a third spring disposed on one side of the second telescopic rod.

[0017] As a preferred solution for the opening and closing device of the cover plate of the hoisting opening in the fan nacelle of the present invention, wherein: the retaining wall includes a first circular hole groove penetrating therethrough.

[0018] As a preferred solution for the opening and closing device of the cover plate of the hoisting opening in the fan nacelle of the present invention, wherein: the gear disk includes a second circular hole groove penetrating therethrough.

[0019] The beneficial effects of the present invention: The present invention can remotely control the two-way opening and closing of the cover plate of the hoisting opening at any time through the driving member and will not lock the cover plate after failure. It can also manually rotate two groups of rotating handles simply on both the inside and outside of the cover plate of the hoisting opening to urgently open and close the cover plate of the hoisting opening. Moreover, it can also inform the staff of the state change of the cover plate of the hoisting opening in real time through the warning member and stably maintain the two states of opening and closing of the cover plate of the hoisting opening through the locking member within a certain period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the opening and closing device of the cover plate of the hoisting opening in the fan nacelle.

[0022] Figure 2 It is an enlarged view of Structure A of the opening and closing device of the cover plate of the hoisting opening in the fan nacelle.

[0023] Figure 3 This is a schematic diagram of the bottom structure of the opening and closing device of the wind turbine nacelle lifting port cover.

[0024] Figure 4 This is an enlarged view of the A-1 structure of the opening and closing device of the wind turbine nacelle lifting port cover.

[0025] Figure 5 This is an enlarged view of the A-11 structure of the opening and closing device of the wind turbine nacelle lifting port cover.

[0026] Figure 6 This is an enlarged view of structure B of the opening and closing device of the wind turbine nacelle lifting port cover.

[0027] Figure 7 This is the C structure position diagram of the opening and closing device of the wind turbine nacelle lifting port cover.

[0028] Figure 8 This is an enlarged view of the C structure of the opening and closing device of the wind turbine nacelle lifting port cover.

[0029] Figure 9 This is an enlarged view of the C-1 structure of the opening and closing device of the wind turbine nacelle lifting port cover.

[0030] Figure 10 This is a schematic diagram of the specific structure of the linkage control unit of the opening and closing device of the wind turbine nacelle lifting port cover. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] Example 1

[0035] Reference Figures 1 to 3 , which is the first embodiment of the present invention, provides an opening and closing device for a wind turbine nacelle hanging opening cover, which includes a main body component 100 and a safety opening and closing component 200.

[0036] Specifically, the main body component 100 includes a bottom platform 101 of the engine room, a lifting opening 102 provided on the bottom platform 101 of the engine room, a cover plate 103 provided on the lifting opening 102, a guardrail group 104 provided on one side of the cover plate 103, and a retaining wall 105 provided on one side of the guardrail group 104;

[0037] The safety opening and closing component 200 includes a driving member 201 provided on one side of the cover plate 103, a coupling control member 202 provided on one side of the driving member 201, a locking member 203 provided on one side of the driving member 201, a warning member 204 provided on one side of the locking member 203, and an opening and closing member 205 provided on one side of the cover plate 103.

[0038] It should be noted that the inside of the retaining wall 105 is a cavity, and there is an opening at the bottom. The coupling control member 202 is arranged in this cavity and penetrates through the bottom platform 101 of the engine room through the bottom opening. The bottom platform 101 of the engine room also has an opening corresponding to the bottom opening of the retaining wall 105 to ensure that when the driving member 201 is running, it drives the coupling control member 202 to run normally; one side of the locking member 203 is fixedly connected to one side of the retaining wall 105, and the warning member 204 is arranged on the driving member 201 and is touched by the locking member 203; the opening and closing member 205 is arranged at the bottom of the cover plate 103.

[0039] Preferably, through the coupling control member 202, the driving member 201 inside the engine room can drive the opening and closing member 205 outside the engine room to open or close the cover plate 103 bidirectionally, which not only ensures the normal bidirectional opening and closing of the cover plate 103 but also protects the driving member 201 from being exposed to the wind and rain outside; the depth of the outside of the bottom platform 101 of the engine room at the lifting opening 102 is sufficient to shield the opening and closing member 205 and a part of the coupling control member 202, avoiding their direct exposure to and being affected by the harsh external environment; the warning member 204 gives a sound warning and is arranged inside the engine room, which is equivalent to transmitting sound in a long sleeve, and the sound transmission effect is better; the locking member 203 and the warning member 204 are respectively provided with two groups and cooperate with each other, corresponding to the locking and warning requirements when the cover plate 103 is completely opened inward and outward respectively, and are arranged on both sides of the driving member 201 to avoid interfering with other rotating parts.

[0040] When in use, when the initial state of the cover plate 103 is closed, first start the driving member 201, drive the opening and closing member 205 to rotate clockwise by ninety degrees through the coupling control member 202, and then open the cover plate 103 towards the inside of the engine room. Reversing by ninety degrees will reset the cover plate 103 to close; continue to start the driving member 201, make the opening and closing member 205 rotate counterclockwise by ninety degrees, and then open the cover plate 103 towards the outside of the engine room. Reversing by ninety degrees will reset the cover plate 103 to close;

[0041] When the cover plate 103 is fully opened either inward or outward of the engine room, the driving member 201 will trigger the locking member 203 and maintain the stable state of the cover plate 103 when it is opened. At the same time, the warning member 204 is triggered by the locking member 203 to inform the staff that the cover plate 103 is fully opened at this time.

[0042] In summary, through the driving member 201 of the present invention, the two-way opening and closing of the lifting opening cover plate can be remotely controlled at any time and place, and the cover plate will not be locked after failure, which does not affect the emergency two-way opening and closing of the lifting opening cover plate. The warning member 204 can also be used to timely inform the staff of the state change of the lifting opening cover plate, and the locking member 203 can stably maintain the two opening and closing states of the lifting opening cover plate within a certain period of time.

[0043] Embodiment 2

[0044] Refer to Figure 6 、 10 This is the second embodiment of the present invention. Different from the first embodiment, it further includes a linkage control member 202 and an opening and closing member 205.

[0045] Specifically, the linkage control member 202 includes a sprocket 202a arranged on one side of the gear disk 201f, a chain 202b arranged on one side of the sprocket 202a, a first connecting shaft 202c arranged on one side of the sprocket 202a, and a first rotating handle 202d penetrating through the first connecting shaft 202c.

[0046] Furthermore, the opening and closing member 205 includes a second rotating handle 205a arranged on one side of the first rotating handle 202d, a second connecting shaft 205b arranged on one side of the second rotating handle 205a, first connecting rods 205c arranged on both sides of the second connecting shaft 205b, second connecting rods 205d arranged on one side of the first connecting rods 205c, and third connecting rods 205e arranged on one side of the second connecting rods 205d.

[0047] It should be noted that there are two groups of sprockets 202a, which are respectively arranged on the inner and outer sides of the engine room. The sprocket 202a inside the engine room is fixedly connected to the first connecting shaft 202c on the same side, and the first rotating handle 202d on the same side penetrates and is fixed on the first connecting shaft 202c; the sprocket 202a outside the engine room is fixedly connected to the second connecting shaft 205b on the same side, and the second rotating handle 205a on this side penetrates and is fixed on the second connecting shaft 205b.

[0048] During use, when the remote control fails or other situations where manual emergency opening of the cover plate 103 is required,

[0049] The person inside the cabin rotates the first rotating handle 202d clockwise by 90 degrees, driving the first connecting shaft 202c and two groups of sprockets 202a to rotate synchronously in the same direction by 90 degrees, driving the second rotating handle 205a to rotate synchronously in the same direction by 90 degrees, driving the first connecting rod 201c to rotate synchronously in the same direction by the same angle, driving the second connecting rod 201d to rotate synchronously in the opposite direction by the same angle, and driving the third connecting rod 201e to rotate synchronously in the opposite direction by the same angle as the second connecting rod 201d, so as to fully open the cover plate 103 towards the inside of the cabin;

[0050] When the person outside the cabin for rescue is unaware of the internal situation or there is an obstruction inside the cabin that prevents the cover plate 103 from opening normally towards the inside of the cabin, the second rotating handle 205a can be rotated counterclockwise by 90 degrees, driving the second connecting shaft 205b to rotate synchronously in the same direction by 90 degrees, driving the first connecting rod 201c to rotate synchronously in the same direction by the same angle, driving the second connecting rod 201d to rotate synchronously in the opposite direction by the same angle, and driving the third connecting rod 201e to rotate synchronously in the opposite direction by the same angle as the second connecting rod 201d, so as to fully open the cover plate 103 towards the outside of the cabin.

[0051] In summary, for the two-way opening of the cover plate 103 of the present invention, it can be achieved by rotating the first rotating handle 202d clockwise and counterclockwise by 90 degrees respectively, and the same applies to the second rotating handle 205a; closing can be achieved by reversing 90 degrees in the opposite direction to the corresponding opening direction.

[0052] Embodiment 3

[0053] Referring to Figures 4 to 10 , which is the third embodiment of the present invention. The difference from the first and second embodiments is that it further includes a driving member 201, a coupling member 202, a locking member 203, a warning member 204, and an opening and closing member 205.

[0054] Specifically, the driving member 201 includes a driving motor 201a, a threaded rod 201b disposed on one side of the driving motor 201a, a limiting ring 201c disposed on one side of the threaded rod 201b, a sector turntable 201d disposed on one side of the threaded rod 201b, and a rack 201e disposed on one side of the sector turntable 201d; the sector turntable 201d includes a special-shaped sliding groove 201d-1 disposed thereon.

[0055] Furthermore, the driving member 201 further includes a gear disk 201f disposed on one side of the sector turntable 201d, a first gear 201g disposed on one side of the gear disk 201f, and a second gear 201h disposed on one side of the gear disk 201f.

[0056] Furthermore, the locking member 203 includes a fixed rod 203a arranged on one side of the retaining wall 105, a first telescopic sleeve 203b arranged on one side of the fixed rod 203a, a first telescopic rod 203c arranged on one side of the first telescopic sleeve 203b, a first spring 203d arranged on one side of the first telescopic rod 203c, and a special-shaped locking block 203e arranged on one side of the first spring 203d.

[0057] Furthermore, the warning member 204 includes a trigger rod 204a arranged on one side of the special-shaped slide groove 201d-1, a second spring 204b arranged on one side of the trigger rod 204a, a hammer head 204c arranged on one side of the second spring 204b, a cavity 204d arranged on one side of the hammer head 204c, a hinged rod 204e arranged on one side of the hammer head 204c, and a fixed block 204f arranged on one side of the hinged rod 204e; the trigger rod 204a includes a protrusion 204a-1 arranged on one side thereof.

[0058] Furthermore, the opening and closing member 205 includes a second rotating handle 205a arranged on one side of the first rotating handle 202d, a second connecting shaft 205b arranged on one side of the second rotating handle 205a, a first connecting rod 205c arranged on both sides of the second connecting shaft 205b, a second connecting rod 205d arranged on one side of the first connecting rod 205c, and a third connecting rod 205e arranged on one side of the second connecting rod 205d.

[0059] Furthermore, the first connecting shaft 202c includes a second telescopic sleeve 202c-1, a second telescopic rod 202c-2 disposed on one side of the second telescopic sleeve 202c-1, and a third spring 202c-3 disposed on one side of the second telescopic rod 202c-2.

[0060] Furthermore, the retaining wall 105 includes a first circular hole 105a penetrating therethrough.

[0061] Furthermore, the gear plate 201f includes a second circular hole 201f-1 extending therethrough.

[0062] It should be noted that one side of the threaded rod 201b is fixedly connected to one side of the retaining wall 105. The limiting ring 201c is sleeved and fixed on the other side of the threaded rod 201b. The sector turntable 201d is threadedly sleeved on the threaded rod 201b. The sector turntable 201d is arranged between the retaining wall 105 and the limiting ring 201c. There are two groups of special-shaped chutes 201d-1. The positions on the rack 201e corresponding to the two groups of special-shaped chutes 201d-1 are notched. The gear disk 201f is sleeved on the threaded rod 201b and is slidably connected thereto. The first gear 201g and the second gear 201h are respectively meshed with the gear disk 201f. The thickness dimensions of the first gear 201g and the second gear 201h are three times the thickness dimensions of the sector turntable 201d and the gear disk 201f respectively. The first gear 201g and the second gear 201h are respectively fixedly connected to one side of the retaining wall 105 through connecting columns, and both gears are slidably connected to their respective connecting columns. The distance between the sector turntable 201d and the limiting ring 201c is exactly equal to its own thickness;

[0063] The first telescopic sleeve 203b, the first telescopic rod 203c, the first spring 203d and the special-shaped locking block 203e are all inclined at an angle to ensure that the special-shaped locking block 203e is clamped into the special-shaped chute 201d-1 when compressed and released. The special-shaped locking block 203e is composed of a square block and an inclined block;

[0064] The special-shaped chute 201d-1 is a broken groove. The convex block 204a-1 is in the first short inclined groove. The size of the special-shaped locking block 203e is adapted to the size of the first inclined groove. The two ends of the second spring 204b are respectively fixedly connected to one side of the sector turntable 201d and the hammer head 204c, and its side biased towards the hammer head 204c is fixedly connected to one side of the trigger rod 204a. One side of the hammer head 204c is fixedly connected to one side of the hinge rod 204e. The other side of the hinge rod 204e is hinged to the fixed block 204f. There are two groups of hinge rods 204e and they are symmetrically arranged on both sides of the hammer head 204c and the fixed block 204f;

[0065] The size of the first connecting shaft 202c is adapted to the first circular hole groove 105a. The second telescopic sleeve 202c-1 passes through the first circular hole groove 105a and is slidably connected to the second telescopic rod 202c-2. One end of the second telescopic rod 202c-2 is fixedly connected to the sector turntable 201d and the gear disk 201f. The two ends of the third spring 202c-3 are respectively fixedly connected to one side of the retaining wall 105 and one side of the gear disk 201f. The first rotating handle 202d is fixedly connected to the other end of the second telescopic sleeve 202c-1. The second circular hole groove 201f-1 is threadedly rotatably connected to the threaded rod 201b.

[0066] Preferably, the initial state of the sector turntable 201d and the rack 201e is vertically placed. The first gear 201g and the second gear 201h are located on the side of the sector turntable 201d without the rack 201e. They are mutually limited by two sets of gears and the sector turntable 201d, and neither of them can rotate. The gear disk 201f cannot rotate either, maintaining the stable closed state of the cover plate 103 at this time. In addition, when the driving motor 201a is started to rotate, it drives the threaded rod 201b to rotate, and the sector turntable 201d and the gear disk 201f can only perform translational motion, which can unlock the limit of the sector turntable 201d by the two sets of gears and can be rotated to open the cover plate 103;

[0067] The inclined block plays a transitional role, enabling the sector turntable 201d to mesh with the gear during translation and squeezing the inclined block out during the rotation of the gear to reset it. At this time, the rack 201e is fully meshed with the gear; the force provided by the first spring 203d is sufficient to support the translation of the sector turntable 201d and ensure that it does not rotate;

[0068] During the rotation of the sector turntable 201d, the squeezing causes the special-shaped locking block 203e to be fully clamped into the first inclined groove of the special-shaped chute 201d-1 by the elastic force of the first spring 203d, which can squeeze the convex block 204a-1, causing the trigger rod 204a to be pushed upward, bending one end of the second spring 204b upward, and driving the hammer head 204c to strike upward into the upper cavity 204d to emit a warning sound.

[0069] During use,

[0070] (1) When it is necessary to open the cover plate 103 towards the interior of the engine room

[0071] First, rotate the driving motor 201a clockwise. Since the sector turntable 201d and the gear disk 201f are limited by two sets of gears and cannot rotate, under the action of the threaded rod 201b, the sector turntable 201d and the gear disk 201f are driven to translate towards the limit ring 201c until they are in full contact with the limit ring 201c and cannot continue to translate. At this time, the sector turntable 201d just disengages from the tooth surfaces of the two sets of gears and releases the limit on each other, and the two sets of gears can mesh and rotate with the gear disk 201f normally;

[0072] Continue to rotate the driving motor 201a clockwise by ninety degrees. The sector turntable 201d and the gear disk 201f rotate synchronously and in the same direction by ninety degrees, driving the first connecting shaft 202c and the two sets of sprockets 202a to rotate synchronously and in the same direction by ninety degrees, driving the second rotating handle 205a to rotate synchronously and in the same direction by ninety degrees, driving the first connecting rod 201c to rotate synchronously and in the same direction by the same angle, driving the second connecting rod 201d to rotate synchronously and in the opposite direction by the same angle, and driving the third connecting rod 201e to rotate synchronously and in the opposite direction by the same angle as the second connecting rod 201d, thereby realizing the full opening of the cover plate 103 towards the interior of the engine room;

[0073] During this rotation process, one end of the rack 201e gradually contacts and presses against the square surface of the special-shaped locking block 203e, causing it to completely fall into the notch at the same end of the rack 201e and enter the first inclined slot of the special-shaped sliding groove 201d-1 under the elastic force of the first spring 203d, and pressing against the convex block 204a-1, so that the trigger rod 204a is pushed upward, causing one end of the second spring 204b to bend upward, driving the hammer head 204c to strike upward into the upper cavity 204d to emit a warning sound; at this time, the staff will know that the cover plate 103 is completely opened towards the interior of the engine room and maintains a stable open state;

[0074] When it is necessary to reset and close the cover plate 103, the drive motor 201a is rotated in the reverse direction. At this time, the sector turntable 201d is limited and cannot rotate due to the engagement of the special-shaped locking block 203e and the special-shaped sliding groove 201d-1, so it moves back horizontally. And at the beginning of just moving back, it starts to engage with the two groups of gears. Although it still cannot rotate, during the movement of maintaining rotational drive with the second gear 201h, the inclined block is squeezed out and reset. At this time, the rack 201e is completely engaged with the second gear 201h, and the two can rotate normally under the drive. At this time, the gear disc 201f can also rotate normally through meshing with the two groups of gears. Continue to reverse the drive motor 201a by ninety degrees, and the rack 201e, the two groups of gears and the gear disc 201f rotate synchronously in the same direction by ninety degrees until the rack 201e loses the meshing relationship with the second gear 201h and is limited by the two groups of gears and stops rotating. At this time, the cover plate 103 is reset and closed; and when the special-shaped locking block 203e is squeezed out, the trigger rod 204a is also reset and under the action of the second spring 204b, the hammer head 204c strikes downward into the lower cavity 204d to emit a warning sound. At this time, the staff will know that the cover plate 103 starts to close and reset towards the outside of the engine room;

[0075] (2) When it is necessary to open the cover plate 103 towards the outside of the engine room,

[0076] First, rotate the drive motor 201a counterclockwise. The sector turntable 201d and the gear disc 201f cannot rotate due to being limited. Under the action of the threaded rod 201b, the sector turntable 201d and the gear disc 201f are driven to move horizontally towards the retaining wall 105 until the gear disc 201f is in full contact with the retaining wall 105 and cannot continue to move horizontally. At this time, the sector turntable 201d just disengages from the tooth surfaces of the two groups of gears and releases the limit on each other. Continue to rotate the drive motor 201a counterclockwise by ninety degrees, and the sector turntable 201d and the gear disc 201f rotate synchronously in the same direction by ninety degrees. Under the action of the connecting shaft and several connecting rods, the cover plate 103 is completely opened towards the outside of the engine room;

[0077] During this rotation process, the principles of the locking and warning functions are the same as above; the principles of reverse rotation to release the lock, start warning, and finally reset to close the cover plate 103 are also the same as above.

[0078] It should be noted that when the motor fails, the device will not lock the cover plate 103, and the cover plate 103 can be opened and closed manually in an emergency.

[0079] In summary, in the present invention, by rotating the driving motor 201a clockwise and counterclockwise respectively, the two-way opening of the lifting port cover plate can be remotely controlled at any time and anywhere, and the two-way reset closing of the cover plate is realized by respectively reversing the driving motor 201a. Moreover, when the driving motor 201a fails, the cover plate will not be locked, which does not affect the emergency two-way opening and closing of the lifting port cover plate. It can also drive the cavity 204d to emit a warning sound to inform the staff of the state change of the lifting port cover plate in real time, and stably maintain the two opening and closing states of the lifting port cover plate by the engagement of the special-shaped locking block 203e and the special-shaped sliding groove 201d-1 within a certain period of time.

[0080] Importantly, it should be noted that the structures and arrangements of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible on the premise of substantially not deviating from the novel teachings and advantages of the subject matter described in this application (for example, the sizes, scales, structures, shapes and proportions of various components, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the recited function in this disclosure, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangements of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0081] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present invention, or those features that are not relevant to the implementation of the present invention).

[0082] It should be understood that, in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be routine work of design, fabrication, and production.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An opening and closing device for the cover plate of the hoisting opening of a fan nacelle, characterized in that: including a main body component (100), comprising a bottom platform (101) of the engine room, a lifting opening (102) arranged on the bottom platform (101) of the engine room, a cover plate (103) arranged on the lifting opening (102), a guardrail group (104) arranged on one side of the cover plate (103), and a retaining wall (105) arranged on one side of the guardrail group (104); a safety opening and closing component (200), comprising a driving member (201) arranged on one side of the cover plate (103), a coupling control member (202) arranged on one side of the driving member (201), a locking member (203) arranged on one side of the driving member (201), a warning member (204) arranged on one side of the locking member (203), and an opening and closing member (205) arranged on one side of the cover plate (103); the driving member (201) includes a driving motor (201a), a threaded rod (201b) arranged on one side of the driving motor (201a), a limit ring (201c) arranged on one side of the threaded rod (201b), a sector turntable (201d) arranged on one side of the threaded rod (201b), and a rack (201e) arranged on one side of the sector turntable (201d); the sector turntable (201d) includes a special-shaped sliding groove (201d-1) arranged thereon; the driving member (201) further includes a gear disk (201f) arranged on one side of the sector turntable (201d), a first gear (201g) arranged on one side of the gear disk (201f), and a second gear (201h) arranged on one side of the gear disk (201f); the coupling control member (202) includes a sprocket (202a) arranged on one side of the gear disk (201f), a chain (202b) arranged on one side of the sprocket (202a), a first connecting shaft (202c) arranged on one side of the sprocket (202a), and a first rotating handle (202d) penetrating through the first connecting shaft (202c); the locking member (203) includes a fixed rod (203a) arranged on one side of the retaining wall (105), a first telescopic sleeve (203b) arranged on one side of the fixed rod (203a), a first telescopic rod (203c) arranged on one side of the first telescopic sleeve (203b), a first spring (203d) arranged on one side of the first telescopic rod (203c), and a special-shaped locking block (203e) arranged on one side of the first spring (203d); The warning member (204) includes a trigger rod (204a) disposed on one side of the special-shaped sliding groove (201d-1), a second spring (204b) disposed on one side of the trigger rod (204a), a hammer head (204c) disposed on one side of the second spring (204b), a cavity (204d) disposed on one side of the hammer head (204c), a hinge rod (204e) disposed on one side of the hammer head (204c), and a fixed block (204f) disposed on one side of the hinge rod (204e); the trigger rod (204a) includes a convex block (204a-1) disposed on one side thereof.

2. The opening and closing device for the cover plate of the lifting opening of the fan nacelle according to claim 1, characterized in that: The opening and closing member (205) includes a second rotating handle (205a) disposed on one side of the first rotating handle (202d), a second connecting shaft (205b) disposed on one side of the second rotating handle (205a), first connecting rods (205c) disposed on both sides of the second connecting shaft (205b), a second connecting rod (205d) disposed on one side of the first connecting rod (205c), and a third connecting rod (205e) disposed on one side of the second connecting rod (205d).

3. The opening and closing device for the cover plate of the hoisting opening of the fan nacelle according to claim 1 or 2, characterized in that: The first connecting shaft (202c) includes a second telescopic sleeve (202c-1), a second telescopic rod (202c-2) disposed on one side of the second telescopic sleeve (202c-1), and a third spring (202c-3) disposed on one side of the second telescopic rod (202c-2).

4. The opening and closing device for the cover plate of the lifting opening of the fan nacelle according to claim 3, characterized in that: The retaining wall (105) includes a first circular hole groove (105a) penetrating therethrough.

5. The opening and closing device for the cover plate of the hoisting opening of the fan nacelle according to claim 1, 2 or 4, characterized in that: The gear disk (201f) includes a second circular hole groove (201f-1) penetrating therethrough.

Images