Ventilation device and box top of box-type transformer

Abstract

The invention relates to a ventilation device and a box top of a box-type transformer, and belongs to the technical field of fan ventilation. The ventilation device comprises a fan cylinder and a protective cover arranged at the top of the fan cylinder in a covering mode, the protective cover is of a cap-shaped structure, and a side plate of a cap brim extends downwards and is provided with a ventilation opening in a louver mode within the corresponding projection range on the fan cylinder. When the fan is used for ventilation, due to the fact that the ventilation openings are the vertically-arranged shutters, external sundries are not prone to being accumulated on the shutters, and the problems that the ventilation effect is poor and frequent cleaning is needed after the fan is used for a long time are effectively solved.

Description

Technical Field

[0001] This invention relates to a ventilation device and the top of a box-type transformer, belonging to the field of fan ventilation technology. Background Technology

[0002] The enclosure protection rating of a box-type transformer is generally no lower than IP54. A higher protection rating means better sealing, but the high internal temperature requires adequate ventilation. Existing ventilation systems for box-type transformers rely on natural convection or mechanical cooling with a single fan. Natural ventilation, which relies on natural air convection, has limited effectiveness and is difficult to reduce the internal temperature under high temperature or high load conditions. Mechanical ventilation typically involves installing fans on the side walls of the box-type transformer for forced ventilation, but this method easily allows external dust and rainwater to enter the enclosure, contaminating electrical equipment and reducing its insulation performance. Furthermore, after prolonged operation, the fan filters are prone to clogging, requiring frequent cleaning and maintenance, increasing operating costs and maintenance workload.

[0003] In the ventilation systems disclosed in the authorization announcements of Chinese utility model patents with authorization announcement numbers CN215633921U, CN216529960U, and CN222996817U, the filters are all horizontally arranged. After long-term exhaust use, dust and debris tend to accumulate on the upper surface. Summary of the Invention

[0004] The purpose of this invention is to provide a ventilation device and the top of a box-type transformer to solve the problem of how to prevent external debris from clogging the filter screen when using a fan for ventilation.

[0005] To achieve the above objectives, the present invention includes:

[0006] A ventilation device according to the present invention includes a fan duct arranged vertically and having a fan installed inside, and a protective cover for covering the top of the fan duct to prevent foreign objects from entering. The protective cover includes a top plate for sealing the opening at the top of the fan duct, and a brim side plate that surrounds the top plate and extends downward. An airflow channel is left between the brim side plate and the fan duct. A ventilation window is opened on the upper part of the side wall of the fan duct within the projection range of the brim side plate, and the ventilation window is covered with louvers.

[0007] Furthermore, the fan casing is formed into a cube shape by four side panels, and the top of the side panels is fixedly connected to the four corners of the top plate by four columns at the four corners to support the protective cover; ventilation windows are formed between each pair of the four columns.

[0008] Furthermore, a fan mounting plate for installing the fan is fixed to the four side plates of the fan casing, and a mounting hole for installing the fan is provided in the middle of the fan mounting plate.

[0009] Furthermore, the fan is an axial flow fan.

[0010] A box-type transformer has a top enclosure including a ventilation device. The ventilation device includes a fan duct that is vertically arranged and has a fan installed inside, and a protective cover for covering the top of the fan duct to prevent foreign objects from entering. The protective cover includes a top plate for sealing the opening at the top of the fan duct, and a cap side plate that surrounds the top plate and extends downward. An airflow channel is left between the cap side plate and the fan duct. A ventilation window is opened on the upper part of the side wall of the fan duct within the projection range of the cap side plate, and the ventilation window is covered with louvers.

[0011] Furthermore, the top of the container also includes a top frame and a top cover plate covering the top frame. The top frame provides fixed support for the ventilation device. The top cover plate has a clearance hole at a corresponding position to avoid the ventilation device. The ventilation device passes through the clearance hole and is sealed to the edge of the clearance hole.

[0012] Furthermore, the top cover plate is angled and covers the top frame of the container.

[0013] Furthermore, the fan casing is formed into a cube shape by four side panels, and the top of the side panels is fixedly connected to the four corners of the top plate by four columns at the four corners to support the protective cover; ventilation windows are formed between each pair of the four columns.

[0014] Furthermore, a fan mounting plate for installing the fan is fixed to the four side plates of the fan casing, and a mounting hole for installing the fan is provided in the middle of the fan mounting plate.

[0015] Furthermore, the fan is an axial flow fan.

[0016] The beneficial effects of this invention are as follows: This invention is an improved invention. The ventilation device of this invention includes a fan casing and a protective cover on top of the fan casing. The protective cover has a hat-shaped structure, with louvered ventilation openings extending downwards from the side panels of the hat onto the corresponding projection area on the fan casing. When using the fan for ventilation, because the ventilation openings are vertically arranged louvers, external debris is less likely to accumulate on the louvers, thus effectively avoiding the problem of poor ventilation and frequent cleaning after long-term use. Attached Figure Description

[0017] Figure 1 This is a front view of a ventilation device according to the present invention;

[0018] Figure 2 yes Figure 1 Sectional view along AA;

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of the V-shaped section;

[0020] Figure 4This is a top view of a ventilation device according to the present invention;

[0021] Figure 5 This is a three-dimensional front view of a ventilation device according to the present invention;

[0022] Figure 6 This is a three-dimensional bottom view of a ventilation device according to the present invention;

[0023] Figure 7 This is a schematic diagram of the top of a box according to the present invention;

[0024] Figure 8 This is a three-dimensional schematic diagram of the top of a box according to the present invention;

[0025] Figure 9 This is a schematic diagram of the ventilation state of a box-type transformer according to the present invention.

[0026] In the diagram: 11. Top plate; 12. Side plate of the cap brim; 2. Fan casing; 21. Fan mounting plate; 211. Mounting hole; 22. Side plate; 23. Column; 3. Louver; 4. Axial flow fan; 5. Box-type transformer; 51. Box top frame; 511. Circumvention hole; 52. Box top cover plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The concept of this invention is to provide a louvered ventilation opening on the side wall of the fan casing.

[0029] Ventilation device implementation method:

[0030] This embodiment provides a ventilation device, which includes a vertically arranged fan casing with a fan installed inside, and a protective cover for covering the top of the fan casing to prevent foreign objects from entering. Figure 1 , Figure 2 and Figure 4 As shown, the protective cover includes a top plate 11 for sealing the opening at the top of the fan casing 2 and a brim side plate 12. The brim side plate 12 extends downward around the top plate 11. As the brim side plate 12 extends downward, it forms a corresponding projection range on the side wall of the fan casing 2, and a ventilation window is opened within the corresponding projection range on the side wall of the fan casing 2. This ventilation window is covered with louvers 3. An airflow channel is left between the brim side plate 12 and the fan casing 2. The top plate 11 can effectively prevent foreign objects from entering the fan casing 2 from the top, and the brim side plate 12 can effectively prevent foreign objects from entering the fan casing 2 from the side. As a specific embodiment of this method, such as Figure 3As shown, the louver 3 used is a sand-proof louver provided in Chinese invention patent application publication number CN 119333032A. Specifically, to demonstrate the transparency effect, Figure 4 Top panel 11 is not displayed.

[0031] Specifically, such as Figure 5 and Figure 6 As shown, the fan casing 2 is formed by four side panels 22, thus creating a cubic shape. Four uprights 23 are located at the four corners of the top of the casing 11, which are fixedly connected to the four corners of the top panel 11, thus supporting the protective cover. Ventilation windows are formed between each pair of uprights 23, and louvers 3 are installed on these windows, thus fixing the louvers 3 to the fan casing 2. To better demonstrate the internal structure of the ventilation device, including the louvers, the top panel 11 and the visor side panels 12 are made transparent.

[0032] Furthermore, a fan mounting plate 21 is provided inside the fan casing 2. The fan mounting plate 21 is fixed to the four side plates 22 of the fan casing 2, and a mounting hole 211 for mounting the fan is opened in the middle of the fan mounting plate 21.

[0033] Specifically, the fan used is an axial flow fan 4.

[0034] Top-mounted implementation method:

[0035] This embodiment provides a top for a box-type transformer, such as... Figure 7 As shown, the top of the container includes a ventilation device, a top cover plate 52, and a top frame 51. The ventilation device used in this embodiment is the same as that described in the ventilation device embodiment. Since the description of this ventilation device is already sufficiently clear in the ventilation device embodiment, it will not be repeated here.

[0036] like Figure 8 As shown, the top cover 52 of the transformer box is inclined and covers the top frame 51, which is used to fix and support the ventilation device. To ensure the ventilation device is fixedly connected to the top of the box, a clearance hole 511 is provided at a corresponding position on the top cover 52, allowing the ventilation device to pass through. After passing through the clearance hole 511, the ventilation device is sealed to the edge of the clearance hole 511, thus preventing foreign objects from entering the transformer box 5 through the clearance hole 511. The ventilation device stops at the top frame 11 after passing through the clearance hole 511, thus achieving the function of the top frame 51 supporting the ventilation device. To more clearly demonstrate the three-dimensional effect, Figure 8 The ventilation system in the document does not include an axial flow fan 4 or louvers 3.

[0037] like Figure 9As shown, the ventilation device is installed on the top of the box-type transformer 5. When ventilating the box-type transformer 5, the internal airflow direction is as follows: Figure 9 As indicated by the arrow, after the air passes through the louvers 3 of the ventilation device, it will be sent to the outside through the airflow channel between the louvers 3 and the brim side plate 12. Since the ventilation opening is set with vertical louvers, it can effectively prevent foreign objects from adhering to the louvers 3 and also prevent foreign objects from entering the box-type transformer 5.

[0038] This embodiment also provides a processing step for the top of the box:

[0039] Step 1: Weld the fan mounting plate 21 to the four side plates 22 of the fan casing 2;

[0040] Step 2: After passing the axial flow fan 4 through the mounting hole 211, fix it to the fan mounting plate 21 with bolts;

[0041] Step 3: Open ventilation windows between the columns 23 on the upper part of the fan casing 2, and then connect the louvers 3 to the columns 23 with bolts;

[0042] Step 4: Weld the top plate 11 and the four brim side plates 12 to form a protective cover;

[0043] Step 5: Weld and fix the four columns 23 to the four corners of the top 11;

[0044] Step 6: Open a clearance hole 511 at the corresponding position of the top cover plate 52 of the box-type transformer 5, so that the ventilation device can pass through the clearance hole 511 and reach the top frame 51 of the box and be welded to the top frame 51. Weld the fan tube 2 of the ventilation device to the clearance hole 511 for fixation.

[0045] Finally, 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 above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific embodiments of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A ventilation device, comprising a vertically arranged fan casing with a fan installed inside, and a protective cover for covering the top of the fan casing to prevent foreign objects from entering, the protective cover comprising a top plate for sealing the opening at the top of the fan casing, and brim side plates extending downward around the top plate, wherein an airflow channel is provided between the brim side plates and the fan casing; characterized in that, A ventilation window is provided on the upper part of the side wall of the fan casing, within the projection range of the brim side plate, and the ventilation window is covered with louvers.

2. The ventilation device according to claim 1, characterized in that, The fan casing is formed into a cube by four side panels. The top of the side panels is fixedly connected to the four corners of the top panel by four columns at the four corners to support the protective cover. The ventilation windows are formed between each pair of the four columns.

3. The ventilation device according to claim 2, characterized in that, A fan mounting plate for installing a fan is fixed to the four side plates of the fan casing, and a mounting hole for installing the fan is provided in the middle of the fan mounting plate.

4. The ventilation device according to claim 1, characterized in that, The fan is an axial flow fan.

5. A box-type transformer's top, including a ventilation device, characterized in that, The ventilation device includes a vertically arranged fan casing with a fan inside, and a protective cover for covering the top of the fan casing to prevent foreign objects from entering. The protective cover includes a top plate for sealing the opening at the top of the fan casing, and a brim side plate that surrounds the top plate and extends downwards. An airflow channel is left between the brim side plate and the fan casing. A ventilation window is opened on the upper part of the side wall of the fan casing within the projection range of the brim side plate, and the ventilation window is covered with louvers.

6. The top of the box-type transformer according to claim 5, characterized in that, The container top also includes a container top frame and a container top cover plate covering the container top frame. The container top frame provides fixed support for the ventilation device. The container top cover plate has a clearance hole at a corresponding position to avoid the ventilation device. The ventilation device passes through the clearance hole and is sealed to the edge of the clearance hole.

7. The top of the box-type transformer according to claim 5, characterized in that, The top cover plate of the container is inclined and covers the top frame of the container.

8. The top of the box-type transformer according to claim 5, characterized in that, The fan casing is formed into a cube by four side panels. The top of the side panels is fixedly connected to the four corners of the top panel by four columns at the four corners to support the protective cover. The ventilation windows are formed between each pair of the four columns.

9. The top of the box-type transformer according to claim 8, characterized in that, A fan mounting plate for installing a fan is fixed to the four side plates of the fan casing, and a mounting hole for installing the fan is provided in the middle of the fan mounting plate.

10. The top of the box-type transformer according to claim 5, characterized in that, The fan is an axial flow fan.

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