Filter screen

Abstract

The filter screen comprises a protective screen and a filter screen body, the protective screen comprises a protective screen frame, a first protective screen body and a second protective screen body, the first protective screen body and the second protective screen body are both arranged on the protective screen frame and are oppositely arranged, and a containing cavity is formed among the protective screen frame, the first protective screen body and the second protective screen body. The filter screen is arranged in the containing cavity. According to the filter screen disclosed by the utility model, the filter screen is arranged in the accommodating cavity of the protective screen, and the protective screen has an impact-resistant function, so that the phenomenon that the filter screen collapses in the process of continuously increasing wind resistance can be reduced, and meanwhile, the filter screen can be prevented from collapsing due to accidental collision in the mounting process due to the arrangement of the protective screen; and the service life of the filter screen can be prolonged, so that the safe operation of the doubly-fed asynchronous generator can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling, and more specifically, to a filter screen. Background Art

[0002] The doubly-fed asynchronous generator adopts direct air cooling, which has been widely used in the wind power industry due to its high cooling efficiency and cost advantages. In order to prevent impurities in the air from entering the interior of the doubly-fed asynchronous generator, a filter is installed on the cooler of the doubly-fed asynchronous generator. As a consumable part, the filter has an increasing wind resistance as the adsorbed impurities increase. Under the impact of increasing wind resistance, the filter is at risk of collapse. Once the filter collapses, impurities in the air will directly enter the interior of the doubly-fed asynchronous generator, seriously affecting the safe operation of the doubly-fed asynchronous generator.

[0003] Therefore, how to design a filter to ensure the safe operation of the double-fed asynchronous generator has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a filter to ensure the safe operation of a double-fed asynchronous generator.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A filter comprising:

[0007] The protective net includes a protective net frame, a first protective net and a second protective net. The first protective net and the second protective net are both arranged on the protective net frame and are arranged opposite to each other. A receiving cavity is formed between the protective net frame, the first protective net and the second protective net.

[0008] The filter screen is arranged in the accommodating cavity.

[0009] Optionally, in the above filter, the filter comprises:

[0010] A filter frame, the filter frame and the protection net frame are detachably connected;

[0011] The filter mesh body is arranged on the filter frame.

[0012] Optionally, in the above-mentioned filter screen, the filter screen frame and the protection screen frame are slidably matched.

[0013] Optionally, in the above-mentioned filter screen, a slide rail is provided on the filter screen frame, and a sliding member is provided on the protective screen frame, and the sliding member is slidably matched with the slide rail.

[0014] Optionally, in the above filter screen, the sliding member includes a plurality of pulleys.

[0015] Optionally, in the above-mentioned filter screen, the protection screen frame includes an end cover that can be opened and closed, and the end cover is hinged or slidably matched with the protection screen frame.

[0016] Optionally, in the above-mentioned filter screen, a protrusion is provided on the protection screen frame, and a slot and a hidden handle matching with the protrusion are provided on the filter screen frame.

[0017] Optionally, in the above-mentioned filter, the filter mesh body is arranged in a foldable manner, and the filter mesh body is bonded to the filter frame.

[0018] Optionally, in the above-mentioned filter net, the first protection net and the second protection net are symmetrically arranged.

[0019] Optionally, in the above-mentioned filter net, the materials of the protection net frame, the first protection net and the second protection net are all made of stainless steel.

[0020] The filter provided by the utility model is arranged in the accommodating cavity of the protective net. The protective net has an impact-resistant function and can reduce the occurrence of collapse of the filter in the process of increasing wind resistance. At the same time, the setting of the protective net can prevent the filter from collapsing due to accidental bumps during installation, thereby extending the service life of the filter and ensuring the safe operation of the double-fed asynchronous generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The present invention discloses a schematic diagram of the structure of a protective net in accordance with an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the filter screen disclosed in the embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the pulley inside the protective net disclosed in the embodiment of the utility model;

[0025] Figure 4 The overall structure of the filter screen disclosed in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 5 The overall structure of the filter screen disclosed in the embodiment of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 6 The overall structure of the filter screen disclosed in the embodiment of the utility model is shown in FIG. Figure 3 ;

[0028] Among them, 10 is a protective net, 11 is a protective net frame, 111 is an end cover, 12 is a first protective net, 13 is a second protective net, and 14 is a sliding member;

[0029] 20 is a filter screen, 21 is a filter screen frame, 22 is a filter screen body, and 23 is a slide rail. DETAILED DESCRIPTION

[0030] The core of the utility model is to provide a filter screen to ensure the safe operation of the double-fed asynchronous generator.

[0031] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0032] like Figure 4 and Figure 6 As shown, an embodiment of the utility model discloses a filter net, including a protective net 10 and a filter net 20.

[0033] like Figure 1 and Figure 6 As shown, the protective net 10 includes a protective net frame 11, a first protective net 12 and a second protective net 13. In order to ensure the impact resistance of the protective net 10, the first protective net 12 and the second protective net 13 can be made of metal. The first protective net 12 and the second protective net 13 are respectively arranged on the protective net frame 11, and the two are arranged relative to each other. Specifically, the first protective net 12 and the second protective net 13 can be fixed to the protective net frame 11 by means of fixing parts, and the fixing parts include various clamps, buckles or screws. The first protective net 12 and the second protective net 13 can have a filtering effect at the same time, filtering large particles of impurities in the air. A accommodating cavity is formed between the protective net frame 11, the first protective net 12 and the second protective net 13, and the filter net 20 is arranged in the accommodating cavity. Specifically, the filter net 20 can be arranged in the accommodating cavity by a snap-on method, or it can be fastened by a fastener, which is not specifically limited here.

[0034] The filter net disclosed in the embodiment of the utility model is arranged in the accommodating cavity of the protective net 10. The first protective net 12 and the second protective net 13 have impact resistance, which can better protect the filter net 20, reduce the occurrence of collapse of the filter net 20 in the process of increasing wind resistance, and prevent the filter net 20 from collapsing due to accidental bumps during the installation process, thereby extending the service life of the filter net 20, and further ensuring the safe and stable operation of the double-fed generator.

[0035] like Figure 2 As shown, in a specific embodiment of the utility model, the filter screen 20 includes a filter screen frame 21 and a filter screen body 22, wherein the filter screen frame 21 is detachably connected to the protective screen frame 11, and the filter screen body 22 is arranged on the filter screen frame 21. The detachable connection method is convenient for cleaning the protective screen 10 and the filter screen 20 separately, and it is also convenient to check whether the filter screen 20 is damaged, and the filter screen 20 can be disassembled and replaced in time. In a specific embodiment, the filter screen body 22 is filter cotton, and the specific material of the filter cotton is not limited.

[0036] In order to facilitate installation and reduce friction, in a specific embodiment of the utility model, the filter screen frame 21 and the protective screen frame 11 are slidably matched. A slide groove can be provided on one of the two, and a sliding part that cooperates with the slide groove can be provided on the other to achieve the sliding match between the two. The sliding match method can facilitate the pulling out of the filter screen 20, and the filter screen 20 can be cleaned or replaced.

[0037] like Figure 2 and Figure 3 As shown, in a specific embodiment of the utility model, a slide rail 23 is provided on the filter screen frame 21, and a sliding member 14 is provided on the protective screen frame 11. The sliding member 14 is slidably matched with the slide rail 23, and the sliding member 14 includes a plurality of pulleys. Specifically, the slide rails 23 are provided on the upper and lower walls of the filter screen frame 21, and pulleys are provided on the upper and lower walls inside the protective screen frame 11. The pulleys cooperate with the slide rails to reduce friction and facilitate the installation of the filter screen 20.

[0038] Figure 6 The figure shows a schematic diagram of pulling the filter net 20 out of the protective net 10. The arrow in the figure indicates the pulling direction. This pulling direction is only for reference, and the filter net 20 can be pulled in any direction.

[0039] like Figure 1 and Figure 5As shown, in a specific embodiment of the utility model, the protective net frame 11 includes an end cover 111 that can be opened and closed. The end cover 111 and the protective net frame 11 can be connected in a hinged manner or in a sliding manner. Specifically, a slide groove can be set on the protective net frame 11, and the end cover 111 slides with the slide groove. The setting of the end cover 111 facilitates the installation and removal of the filter 20, and can also limit the filter 20 to prevent the filter 20 from separating from the protective net 10. During installation, open the end cover 111, and match the slide rail 23 of the filter frame 21 with the pulley so that the filter frame 21 is installed on the protective net frame 11. After installation, cover the end cover 111. When the filter 20 needs to be replaced, open the end cover 111, remove the filter 20, clean the protective net 10, replace it with a new protective net 10, and cover the end cover 111.

[0040] In a specific embodiment of the utility model, a protrusion is provided on the protective net frame 11, and a card slot and a hidden handle that match the protrusion are provided on the filter frame 21. In this embodiment, the end cover 111 can be provided on any side wall of the protective net frame 11. The protective net frame 11 and the filter frame 21 are card-connected and matched. When disassembly is required, the hidden handle is opened and the filter 20 is pulled out to be removed. The setting of the hidden handle facilitates the disassembly and assembly of the filter 20. In order to ensure the firmness of the connection between the two, a slot can also be provided on the protective net frame 11, and a plug plate that matches the slot can be provided on the filter frame 21.

[0041] In a specific embodiment of the present invention, the filter mesh body 22 is arranged in a foldable manner, and the filter mesh body 22 is bonded to the filter frame 21 .

[0042] On the basis of the above embodiment, the first protection net 12 and the second protection net 13 are symmetrically arranged. Since the material of the filter cotton is relatively soft, its wind resistance increases continuously with the increase of adsorbed impurities. In the prior art, the filter cotton and the frame are usually bonded only with adhesives, and the wind resistance increases continuously, impacting the filter cotton, and there is a risk of collapse of the filter cotton. In the embodiment of the utility model, the filter cotton is arranged between the first protection net 12 and the second protection net 13. The first protection net 12 and the second protection net 13 can play a better protective role and protect the filter cotton. At the same time, when the filter cotton is damaged, the filter net 20 can be removed and the filter cotton can be replaced. The protection net 10 can be recycled, which can reduce maintenance costs.

[0043] In order to make the protective net 10 better protect and resist impact, the filter net disclosed in the embodiment of the utility model, the protective net frame 11, the first protective net 12 and the second protective net 13 are all made of stainless steel. The strength of stainless steel has good impact resistance, which can prevent the filter net 20 from collapsing due to accidental bumps during installation, and can provide better protection for the filter net 20.

[0044] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A filter screen, characterized in that: include: A protection net (10), the protection net (10) comprising a protection net frame (11), a first protection net (12) and a second protection net (13), the first protection net (12) and the second protection net (13) being both arranged on the protection net frame (11) and arranged opposite to each other, and a receiving cavity being formed between the protection net frame (11), the first protection net (12) and the second protection net (13); A filter screen (20), wherein the filter screen (20) is arranged in the accommodating cavity.

2. The filter screen according to claim 1, characterized in that: The filter screen (20) comprises: A filter screen frame (21), the filter screen frame (21) being detachably connected to the protection screen frame (11); The filter screen body (22) is arranged on the filter screen frame (21).

3. The filter screen according to claim 2, characterized in that: The filter screen frame (21) is slidably matched with the protection screen frame (11).

4. The filter screen according to claim 3, characterized in that: The filter screen frame (21) is provided with a slide rail (23), and the protection screen frame (11) is provided with a slide member (14), wherein the slide member (14) is in sliding cooperation with the slide rail (23).

5. The filter screen according to claim 4, characterized in that: The sliding member (14) comprises a plurality of pulleys.

6. The filter screen according to claim 3, characterized in that: The protection net frame (11) comprises an end cover (111) that can be opened and closed, and the end cover (111) is hingedly connected or slidably matched with the protection net frame (11).

7. The filter screen according to claim 2, characterized in that: The protective net frame (11) is provided with a protrusion, and the filter net frame (21) is provided with a slot and a hidden handle that match the protrusion.

8. The filter screen according to claim 2, characterized in that: The filter mesh body (22) is arranged in a foldable manner, and the filter mesh body (22) is bonded to the filter mesh frame (21).

9. The filter screen according to claim 8, characterized in that: The first protection net (12) and the second protection net (13) are symmetrically arranged.

10. The filter screen according to any one of claims 1 to 9, characterized in that: The material of the protection net frame (11), the first protection net (12) and the second protection net (13) are all stainless steel.

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