Detachable filter screen device for tower door of wind generating set
By designing a filter device with a detachable fan frame and frame structure, the problem of inconvenient replacement of the tower filter of the wind turbine assembly is solved, and the filter is easily changed and effective protection is achieved, and the equipment operation environment is improved.
Patent Information
- Application Number
- CN202422075296.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The tower filter mesh of existing wind turbine units is inconvenient to replace, is easily blocked, is easily corroded, has large holes and is easily damaged, and is easy to enter, affecting the operating environment of the equipment.
A removable filter device for tower door of wind turbine generator sets is designed, adopting a detachable and connected fan frame and frame structure, combining the filter cotton layer and window screen layer, adsorbing condensation through the filter cotton layer and reducing insect entry, improving the convenience of disassembly and assembly and protective effect of the filter.
It improves the service life of the filter, reduces the possibility of insect entry and condensation corrosion, and improves the stability and safety of the equipment operating environment.
Smart Images
Figure CN223075433U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ventilation doors and windows of a wind turbine tower barrel, in particular to a detachable filter screen device for a door of a wind turbine tower barrel. Background Art
[0002] At present, ventilation is achieved by opening windows in the tower barrel of a wind turbine generator set, and a filter screen is fixed at the window to form a protection structure. However, the currently used tower barrel filter screen is fixed by a total of 12 bolts around it. The replacement or cleaning of the filter screen is rather troublesome. Replacing the filter screen requires removing and reinstalling 12 bolts, which is time-consuming and laborious, and the working efficiency is extremely low. The filter screen is prone to blockage, resulting in poor ventilation inside the tower barrel. In summer, when the temperature is high, the temperature inside the tower barrel is relatively high, which easily leads to high-temperature alarms of equipment. In autumn and winter, the temperature difference between the inside and outside of the tower barrel is large, causing serious condensation on the inner wall of the tower barrel, which easily causes equipment corrosion or insulation reduction, reducing the service life of the equipment. The quality of the fixed screen window of the filter screen is poor, the holes are large, and a large number of insects enter the tower barrel after damage, seriously affecting the operating environment of the equipment. Content of the Utility Model
[0003] Aiming at the technical problems of the existing filter screen being inconvenient to disassemble and assemble, easy to block, easy to be corroded, and having large holes and being prone to damage and allowing insects to enter, the utility model provides a detachable filter screen device for a door of a wind turbine tower barrel.
[0004] The technical solution of the utility model to solve the above technical problems is as follows:
[0005] A detachable filter screen device for a door of a wind turbine tower barrel includes a frame, a sash frame, and a filter cotton layer frame. The sash frame is located inside the frame. One end of the sash frame is rotatably connected to one end of the frame, and the other end of the sash frame is detachably connected to the other end of the frame. Window screen layers are respectively installed on the frame and the sash frame. The filter cotton layer frame is located between the two window screen layers, and both sides of the filter cotton layer frame respectively abut against the two window screens.
[0006] The beneficial effects of the utility model are as follows: During use, the filter cotton layer reduces the problem of insects entering due to the holes or damage of the window screen layer, and adsorbs the condensation by using the filter cotton layer, reducing the possibility of corrosion caused by the hanging of condensation on the window screen layer itself. In addition, the detachable connection method of the other end of the sash frame and the other end of the frame is used to disassemble, assemble, and replace the filter cotton layer, thereby improving the service life of the entire device as a whole and improving the technical problems of the existing filter screen being inconvenient to disassemble and assemble, easy to block, easy to be corroded, and having large holes and being prone to damage and allowing insects to enter.
[0007] On the basis of the above technical solution, the utility model can also be improved as follows.
[0008] Furthermore, a frame ring-shaped fan frame is fixed to the inner wall of the frame fan frame, and a first ring groove fan frame that penetrates to the inner side of the frame ring-shaped fan frame is provided on the stepped surface of the frame ring-shaped fan frame. The fan frame abuts against the stepped surface of the frame ring-shaped fan frame, and a fan frame ring-shaped fan frame away from the frame ring-shaped fan frame is fixed to its inner wall. A second ring groove fan frame is formed between the fan frame ring-shaped fan frame and the stepped surface of the frame ring-shaped fan frame. The first ring groove fan frame communicates with the second ring groove fan frame to form a clamping space. Screen layers fan frame are respectively installed on the opposite groove bottoms of the first ring groove fan frame and the second ring groove fan frame. The filter cotton layer fan frame is filled in the clamping space formed by the two screen layers fan frame.
[0009] The beneficial effect of adopting the above further scheme is that the frame ring platform forms the support for the fan frame through the fan frame ring platform, ensuring the stable installation of the fan frame and its screen layer. The two screen layers and the filter cotton layer are filled in the clamping space formed by the first ring groove and the second ring groove, and will not shake due to external force. And when replacement is needed, the fan frame can be rotated to take out.
[0010] Furthermore, a plurality of evenly distributed pressing pieces are slidably connected to the groove walls of the first ring groove and / or the second ring groove. One end of the pressing piece is slidably installed on the corresponding groove wall, and the other end is pressed against the screen layer by the filter cotton layer.
[0011] The beneficial effect of adopting the above further scheme is that when installing the screen layer, the screen layer is inserted between the plurality of pressing pieces and the first ring groove or the second ring groove to form a limiting effect on the screen layer, preventing the installation of the filter cotton layer from being hindered due to the deformation of the screen layer.
[0012] Furthermore, insertion slots are provided on the groove walls of the first ring groove and / or the second ring groove. One end of each pressing piece is adapted and slidably connected to each insertion slot.
[0013] The beneficial effect of adopting the above further scheme is that the installation of the pressing piece is completed by inserting the end of the pressing piece into the insertion slot.
[0014] Furthermore, the installation of the pressing piece is completed by inserting the end of the pressing piece into the insertion slot.
[0015] The beneficial effect of adopting the above further scheme is that the pressing piece is limited by the card slot to prevent the pressing piece from slipping out of the insertion slot from the opening direction of the insertion slot.
[0016] Furthermore, the insertion slot and the card slot both penetrate to the stepped surface of the frame ring platform or the fan frame ring platform.
[0017] The beneficial effect of adopting the above further scheme is that the disassembly and assembly of the pressing piece can be completed from the through opening of the card slot.
[0018] Further, springs corresponding to each of the slots are installed on the frame and / or the fan frame, one end of each spring is fixedly connected to the inner wall of the corresponding slot, and the other end is fixedly connected to the corresponding pressing piece.
[0019] The beneficial effect of adopting the above further solution is that: springs corresponding to each of the slots are installed on the frame and / or the fan frame, one end of each spring is fixedly connected to the inner wall of the corresponding slot, and at least one side of the other end fixedly connected to the corresponding pressing piece is provided with a pressing groove corresponding to each pressing piece, and the other end of each pressing piece is inserted into the corresponding pressing groove.
[0020] The beneficial effect of adopting the above further solution is that: it ensures that the filter cotton layer and the window screen layer are in mutual contact, and enables the pressing piece to form a limiting effect on the installation of the filter cotton layer by inserting into the pressing groove, preventing random sliding.
[0021] Further, at least two hinges are installed at corresponding positions at one end of the fan frame and one end of the frame.
[0022] The beneficial effect of adopting the above further solution is that: the rotational installation of the fan frame can be completed through the hinges.
[0023] Further, at least two folding buckles are installed at corresponding positions at the other end of the fan frame and the other end of the frame.
[0024] The beneficial effect of adopting the above further solution is that: the disassembly and assembly of the window screen layer and the filter cotton layer can be quickly completed by opening the folding buckles. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is an axonometric view of the detachable filter device of the present utility model;
[0026] Figure 2 is Figure 1 a partial cross-sectional view taken along the line A-A in
[0027] Figure 3 is Figure 1 a partial cross-sectional view taken along the line B-B in
[0028] Figure 4 is a partial structural schematic diagram of the fan frame in the open state.
[0029] In the drawings, the list of components represented by each reference numeral is as follows:
[0030] 1. Frame; 11. Frame ring platform; 12. First ring groove; 2. Fan frame; 21. Fan frame ring platform; 22. Second ring groove; 3. Window screen layer; 4. Filter cotton layer; 41. Pressing groove; 42. Avoidance surface; 5. Pressing piece; 6. Slot; 61. Card slot; 7. Spring; 8. Hinge; 9. Folding buckle. DETAILED DESCRIPTION OF THE INVENTION
[0031] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.
[0032] Embodiment 1
[0033] As Figures 1 to 4 , a detachable filter device for the tower barrel door of a wind turbine generator set, includes a frame 1, a fan frame 2, and a filter cotton layer 4. The fan frame 2 is located inside the frame 1. One end of the fan frame 2 is rotatably connected to one end of the frame 1, and the other end of the fan frame 2 is detachably connected to the other end of the frame 1. Window screen layers 3 are respectively installed on the frame 1 and the fan frame 2. The filter cotton layer 4 is located between the two window screen layers 3, and both sides of the filter cotton layer 4 respectively abut against the two window screen layers 3.
[0034] The beneficial effects of this embodiment are as follows: During use, the filter cotton layer 4 reduces the problem of insects entering due to the holes or damage of the window screen layer 3, and adsorbs the condensation by using the filter cotton layer 4, reducing the possibility of corrosion caused by the condensation hanging on the window screen layer 3 itself. In addition, the detachable connection method between the other end of the fan frame 2 and the other end of the frame 1 is used to disassemble, install, and replace the filter cotton layer 4, thereby improving the service life of the entire device as a whole and improving the technical problems of the existing filter screen being inconvenient to disassemble and install, easy to block, easy to be corroded, and having large holes and being easily damaged and allowing insects to enter.
[0035] Among them, the frame 1 is a rectangular frame structure and can be made of steel; the fan frame 2 is also a rectangular frame structure, fits and abuts against the inner side of the frame 1, and can be made of steel.
[0036] The window screen layer 3 is a steel wire mesh with a fine pore mesh structure woven from steel wires, and the filter cotton layer 4 is made of filter cotton and has the function of filtering air.
[0037] In the embodiment of the present utility model, the filter cotton layer 4 abuts against the window screen layer 3, can adsorb the condensation on the window screen layer 3 formed due to temperature difference and other effects, so as to extend the service life of the window screen layer 3, and only need to replace the filter cotton layer 4.
[0038] Embodiment 2
[0039] As Figures 1 to 4, on the basis of Embodiment 1, a frame ring platform 11 is fixed to the inner wall of the frame 1, and a first ring groove 12 penetrating to the inside of the frame ring platform 11 is provided on the step surface of the frame ring platform 11. The fan frame 2 abuts against the step surface of the frame ring platform 11, and a fan frame ring platform 21 away from the frame ring platform 11 is fixed to its inner wall. A second ring groove 22 is formed between the fan frame ring platform 21 and the step surface of the frame ring platform 11. The first ring groove 12 communicates with the second ring groove 22 to form a clamping space. Window screen layers 3 are respectively installed on the opposite groove bottoms of the first ring groove 12 and the second ring groove 22, and a filter cotton layer 4 is filled in the clamping space formed by the two window screen layers 3.
[0040] The beneficial effect of adopting the preferred scheme in the above embodiment is that the frame ring platform 11 forms a support for the fan frame 2 through the fan frame ring platform 21, ensuring the stable installation of the fan frame 2 and its window screen layer 3, so that the two window screen layers 3 and the filter cotton layer 4 are filled in the clamping space formed by the first ring groove 12 and the second ring groove 22, and will not shake due to external force. And when replacement is needed, the fan frame 2 can be rotated to take it out.
[0041] In the embodiment of the present utility model, both the first ring groove 12 and the second ring groove 21 are of rectangular groove structures, so as to adapt to and complete the installation of the window screen layer 3 and the filter cotton layer 4.
[0042] On the basis of the above embodiment, an inclined surface is formed at one end of the filter cotton layer 4 close to the rotation installation of the fan frame 2 to form an avoidance surface 42, so as to ensure that when the fan frame 2 is rotated, the fan frame ring platform 21 can avoid the filter cotton layer 4 and the fan frame 2 can be normally opened.
[0043] Embodiment 3
[0044] As Figure 3 and Figure 4 , on the basis of Embodiments 1 and 2, a plurality of uniformly distributed pressing pieces 5 are slidably connected to the groove walls of the first ring groove 12 and / or the second ring groove 22. One end of the pressing piece 5 is slidably installed on the corresponding groove wall, and the other end is pressed against the window screen layer 3 by the filter cotton layer 4.
[0045] The beneficial effect of adopting the preferred scheme in the above embodiment is that when installing the window screen layer 3, the window screen layer 3 is inserted between the plurality of pressing pieces 5 and the first ring groove 12 or the second ring groove 22 to form a limiting effect on the window screen layer 3, preventing the installation of the filter cotton layer 4 from being hindered due to the deformation of the window screen layer 3.
[0046] As one of the specific schemes of the above embodiment, a plurality of uniformly distributed pressing pieces 5 are slidably connected to the groove wall of the first ring groove 12, and both sides of the plurality of pressing pieces 5 are simultaneously abutted against one side of one of the window screen layers 3 and the filter cotton layer 4.
[0047] As the second specific solution of the above embodiment, a plurality of uniformly distributed pressing sheets 5 are slidably connected to the groove wall of the second annular groove 22, and both sides of the plurality of pressing sheets 5 are simultaneously abutted against the other window screen layer 3 and the other side of the filter cotton layer 4.
[0048] As the third specific solution of the above embodiment, a plurality of uniformly distributed pressing sheets 5 are slidably connected to the groove walls of the first annular groove 12 and the second annular groove 22. The plurality of pressing sheets 5 are uniformly distributed on the filter cotton layer 4 and are respectively slidably connected to the first annular groove 12 and the second annular groove 22.
[0049] Embodiment 4
[0050] As Figure 3 and Figure 4 , on the basis of Embodiments 1-3, a slot 6 is formed in the groove wall of the first annular groove 12 and / or the second annular groove 22, and one end of each pressing sheet 5 is adapted and slidably connected to each slot 6.
[0051] The beneficial effect of adopting the preferred solution in the above embodiment is that the installation of the pressing sheet 5 can be completed by inserting the end of the pressing sheet 5 into the slot 6.
[0052] The slot 6 is a rectangular slot.
[0053] Embodiment 5
[0054] As Figure 3 and Figure 4 , on the basis of Embodiments 1-4, at least one inner wall of the slot 6 is provided with a clamping groove 61, and one end of the pressing sheet 5 is adapted and simultaneously slidably connected to the slot 6 and the clamping groove 61.
[0055] The beneficial effect of adopting the preferred solution in the above embodiment is that the pressing sheet 5 is limited by the clamping groove 61 to prevent the pressing sheet 5 from slipping out of the slot 6 from the opening direction of the slot 6.
[0056] The clamping groove 61 is a rectangular slot. When there is one clamping groove 61, it forms an "L"-shaped groove with a cross-section of "L" together with the slot 6; when there are two clamping grooves 61, it forms a "U"-shaped groove with a cross-section of "U" together with the slot 6.
[0057] Embodiment 6
[0058] As Figure 3 and Figure 4 , on the basis of Embodiments 1-5, the slot 6 and the clamping groove 61 both penetrate through to the step surface of the frame ring platform 11 or the fan frame ring platform 21.
[0059] The beneficial effect of adopting the preferred solution in the above embodiment is that the disassembly and assembly of the pressing sheet 5 can be completed from the through opening of the clamping groove 61.
[0060] Embodiment 7
[0061] As Figure 3 and Figure 4 Based on Embodiments 1-6, springs 7 corresponding one by one are installed on the frame 1 and / or the fan frame 2 at each slot 6. One end of the spring 7 is fixedly connected to the inner wall of the slot 6, and the other end is fixedly connected to the corresponding pressing piece 5.
[0062] The beneficial effect of adopting the preferred solution in the above embodiment is that, through the elastic force of the spring 7, a space with a width greater than the thickness of the window screen layer 3 is formed between the pressing piece 5 and the slot wall of the slot 6, facilitating the disassembly and assembly of the window screen layer 3.
[0063] The spring 7 can be made of stainless steel. When the slot 6 and the clamping slot 61 penetrate through the step surface of the frame ring platform 11 or the fan frame ring platform 21 at the same time, the spring 7 and the pressing piece 5 can be installed successively from the slot opening.
[0064] Specifically, when removing the corresponding window screen layer 3, the spring 7 ejects the pressing piece 5 away from the window screen layer 3, facilitating the removal of the window screen layer 3; when installing the window screen layer 3, by using the elastic force of the spring 7, a space with a width greater than the thickness of the window screen layer 3 is formed between the pressing piece 5 and the slot wall of the slot 6, facilitating the installation of the window screen layer 3.
[0065] Embodiment 8
[0066] As Figure 3 and Figure 4 Based on Embodiments 1-7, at least one side of the filter cotton layer 4 is provided with pressing grooves 41 corresponding to each pressing piece 5, and the other end of each pressing piece 5 is inserted into the corresponding pressing groove 41.
[0067] The beneficial effect of adopting the preferred solution in the above embodiment is to ensure that the filter cotton layer 4 is in mutual contact with the window screen layer, and the pressing piece 5 forms a limiting effect on the installation of the filter cotton layer 4 by inserting into the pressing groove 41, preventing random sliding.
[0068] Among them, the depth of the pressing groove 41 is equal to the thickness of the corresponding pressing piece 5 to ensure that the filter cotton layer 4 is tightly pressed against the window screen layer 3.
[0069] Embodiment 9
[0070] As Figure 1 and Figure 2 Based on Embodiments 1-8, at least two hinges 8 are installed at the corresponding positions of one end of the fan frame 2 and one end of the frame 1.
[0071] The beneficial effect of adopting the preferred solution in the above embodiment is to complete the rotational installation of the fan frame 2 through the hinge 8.
[0072] Among them, the hinge 8 can be purchased on the market. Two of the pages of the hinge 8 are respectively fixed to the frame 1 and the fan frame 2 by screws.
[0073] Example 10
[0074] As Figure 1 and Figure 2 , on the basis of Examples 1 - 9, at least two folding buckles 9 are installed at the corresponding positions at the other ends of the fan frame 2 and the frame 1.
[0075] The beneficial effect of adopting the preferred solution in the above - mentioned embodiment is to quickly complete the disassembly and assembly of the window screen layer 3 and the filter cotton layer 4 by opening the folding buckle 9.
[0076] Among them, the folding buckle 9 can be purchased in the market. The lock body of the folding buckle 9 is fixed to the fan frame 2 by screws, and the hook is fixed to the frame 1 by screws, and the lock tongue rotates to complete the connection with the hook.
[0077] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.
[0078] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0079] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present utility model can be understood according to specific circumstances.
[0080] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.
[0081] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0082] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A detachable filter device for the tower barrel door of a wind turbine generator, characterized in that It includes a frame (1), a fan frame (2) and a filter cotton layer (4). The fan frame (2) is located inside the frame (1). One end of the fan frame (2) is rotatably connected to one end of the frame (1), and the other end of the fan frame (2) is detachably connected to the other end of the frame (1). Window screen layers (3) are respectively installed on the frame (1) and the fan frame (2). The filter cotton layer (4) is located between the two window screen layers (3), and both sides of the filter cotton layer (4) are respectively abutted against the two window screen layers (3).
2. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 1, wherein, A frame ring platform (11) is fixed on the inner wall of the frame (1), and a first ring groove (12) penetrating to the inside of the frame ring platform (11) is formed on the step surface of the frame ring platform (11). The fan frame (2) abuts against the step surface of the frame ring platform (11), and a fan frame ring platform (21) far from the frame ring platform (11) is fixed on its inner wall. A second ring groove (22) is formed between the fan frame ring platform (21) and the step surface of the frame ring platform (11). The first ring groove (12) communicates with the second ring groove (22) to form a clamping space. The window screen layers (3) are respectively installed on the opposite groove bottoms of the first ring groove (12) and the second ring groove (22). The filter cotton layer (4) is filled in the clamping space formed by the two window screen layers (3).
3. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 2, wherein, A plurality of evenly distributed pressing sheets (5) are slidably connected to the groove walls of the first ring groove (12) and / or the second ring groove (22). One end of the pressing sheet (5) is slidably installed on the corresponding groove wall, and the other end is pressed against the window screen layer (3) by the filter cotton layer (4).
4. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 3, wherein Insert slots (6) are formed on the groove walls of the first ring groove (12) and / or the second ring groove (22). One end of each pressing sheet (5) is adapted to and slidably connected to each insert slot (6).
5. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 4, characterized in that At least one inner wall of the insert slot (6) is provided with a clamping groove (61). One end of the pressing sheet (5) is adapted to and simultaneously slidably connected to the insert slot (6) and the clamping groove (61).
6. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 5, characterized in that, The insert slot (6) and the clamping groove (61) both penetrate to the step surface of the frame ring platform (11) or the fan frame ring platform (21).
7. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 5, characterized in that, Springs (7) corresponding to each insert slot (6) are installed on the frame (1) and / or the fan frame (2). One end of the spring (7) is fixedly connected to the inner wall of the insert slot (6), and the other end is fixedly connected to the corresponding pressing sheet (5).
8. The detachable filter device for the tower barrel door of a wind turbine generator set according to claim 3, characterized in that, At least one side of the filter cotton layer (4) is provided with pressing grooves (41) corresponding to each pressing sheet (5). The other end of each pressing sheet (5) is inserted into the corresponding pressing groove (41).
9. The detachable filter device for the tower barrel door of a wind turbine generator set according to any one of claims 1-8, wherein At least two hinges (8) are installed at corresponding positions of one end of the fan frame (2) and one end of the frame (1).
10. A detachable filter device for the tower door of a wind turbine generator set according to any one of claims 1-8, characterized in that, At least two folding buckles (9) are installed at corresponding positions of the other end of the fan frame (2) and the other end of the frame (1).