A device to prevent the outer door of a prefabricated substation from falling off.

Abstract

This utility model relates to the field of new energy prefabricated substations, specifically to an anti-fall device for the outer door of a prefabricated substation. The outer door is hinged to the door frame and includes an anti-fall device bracket. The anti-fall device bracket is installed on the lower inner side of the outer door, away from the connection point between the outer door and the substation body. A roller is supported on the anti-fall device bracket via a bearing. The roller makes rolling contact with the substation door sill, providing support for the outer door. This solves the problem of easy damage to the outer door of the prefabricated substation.

Description

Technical Field

[0001] This utility model relates to the field of new energy prefabricated substations, specifically to a device for preventing the outer door of a prefabricated substation from falling off. Background Technology

[0002] In the field of new energy, the prefabricated substations widely used in photovoltaic and wind power plants are mostly made of cold-rolled steel plates for their outer shells. The outer door of the prefabricated substation (hereinafter referred to as "substation outer door") is usually 2.1m×1m in size, and the door panel is made of 3mm thick cold-rolled steel plate. After assembling electrical components, the weight of a single substation outer door can reach 50-60kg, making the overall weight quite large.

[0003] Currently, the connection between the outer door and the transformer substation body mainly relies on conventional hinges. In static placement scenarios, this hinge structure can withstand the weight of the outer door, ensuring normal closure and stationary position. However, during transportation, the outer door of the transformer substation will continuously sway up and down due to road bumps. At this time, significant stress concentration occurs at the hinge connection between the outer door and the transformer body. With increasing transportation time and accumulated bumps, the metal materials of the hinge and connection points will gradually experience fatigue damage. This metal fatigue directly causes the outer door, which was originally firmly connected to the transformer body, to warp and deform, causing the hinge's shaft hole to lose concentricity, thus preventing the outer door from opening and closing properly. In more severe cases, fatigue damage can cause the hinge to break or the connection points to fail, leading to the outer door falling off during transportation. This not only damages the outer door and the transformer body but may also cause transportation safety accidents, increasing equipment maintenance costs and transportation risks, making it difficult to meet the reliability requirements for transportation and long-term use of transformer substations. Summary of the Invention

[0004] The present invention aims to provide a device to prevent the outer door of a prefabricated substation from falling off, so as to solve the problem of easy damage to the outer door of the prefabricated substation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for preventing the outer door of a box-type substation from falling off, wherein the side of the outer door is hinged to the outer door frame, characterized in that: it includes a support bracket for the device, the support bracket for the device is installed on the lower inner side of the outer door, away from the connection point between the outer door and the box body, and a roller is supported on the support bracket for the device by a bearing, the roller making rolling contact with the threshold of the box-type substation, thus providing support for the outer door.

[0006] The working principle and advantages of this solution are as follows: Rollers are installed on the outer door via anti-fall device brackets. These rollers roll in contact with the substation threshold. When the outer door is closed, the anti-fall device brackets installed on the lower inner side of the outer door and the rollers supported on them maintain rolling contact with the threshold. This device transfers most of the weight of the outer door to the threshold via the rollers, significantly reducing the load on the hinges and preventing hinge deformation or metal fatigue caused by stress concentration. Especially during transportation, when the enclosure is subjected to bumps and vibrations, the rollers roll on the threshold with the slight displacement of the outer door. This not only limits the vertical sinking or swaying of the outer door but also converts traditional sliding friction into rolling friction. This ensures the outer door can be opened and closed normally during operation and maintenance without adding extra operational difficulty, making it suitable for long-term operation and maintenance scenarios of prefabricated substations. This device effectively improves the structural reliability and safety of the substation outer door during dynamic transportation, preventing deformation, misalignment, or detachment, and extending the service life of the hinges and the overall outer door.

[0007] The anti-fall device consists of only a bracket, bearings, and rollers. It has few parts and a simple structure, and does not require complex modifications to the outer door or body of the transformer substation. For newly manufactured transformer substations, the device can be integrated directly during the manufacturing process. For transformer substations already in use, it can also be installed by simple bolt fixing. It has strong adaptability, low modification cost, and is easy to promote and apply on a large scale.

[0008] Preferably, a limiting block is provided at the lower part of the outer door, and the limiting block abuts against the outer side of the transformer substation threshold.

[0009] Beneficial effect: By cooperating with the threshold of the transformer substation, the limit block limits the inward and outward directions of the outer door, preventing excessive displacement of the outer door in the inward and outward directions and causing damage.

[0010] More preferably, the inner side of the limiting block is provided with a clearance groove, the opening direction of the clearance groove is the inward direction, the transformer threshold includes a fixing part and a supporting part, the fixing part is fixedly connected to the box body, the supporting part extends upward, the upper end face of the supporting part rolls with the roller, and the outer side face abuts against the bottom of the clearance groove.

[0011] Beneficial effects: The limiting block is equipped with a clearance groove, which cooperates with the support part of the transformer door threshold and contacts the outer side of the support part. The support part is located in the clearance groove, which can limit the vertical movement of the support part and prevent damage to the outer door due to excessive displacement.

[0012] Preferably, the roller is a nylon roller.

[0013] Beneficial effects: It has a low coefficient of friction, so there is no need to add extra lubricant to reduce friction. It does not produce metal shavings after wear, which can avoid wear on mating parts.

[0014] Preferably, a stud is fixedly connected to the outer door, and the anti-fall device bracket is provided with a mounting through hole. The stud passes through the mounting through hole and engages with a nut to fix the anti-fall device bracket to the outer door.

[0015] Beneficial effects: The structure of pre-installed fixing studs on the outer door and through-holes in the anti-fall device bracket eliminates the need for additional on-site drilling and tapping on the bracket or outer door. Simply align the bracket through-hole with the stud, insert it, and engage the nut to complete the fixation. This simplifies the assembly process, reduces reliance on on-site installation tools, and allows for rapid assembly of the anti-fall device even in non-professional processing environments such as substations, improving construction efficiency. Furthermore, the through-hole structure provides some tolerance for minor deviations in stud position, reducing assembly difficulties caused by processing errors and enhancing adaptability.

[0016] Preferably, the outer door includes a left outer door and a right outer door, and the anti-fall device is symmetrically installed at the lower right corner of the left outer door and the lower left corner of the right outer door.

[0017] Beneficial effects: The symmetrical installation method allows the weight of the two outer doors to be evenly transferred to the threshold of the transformer substation through the anti-fall devices in corresponding positions. The symmetrical layout can avoid the imbalance of force caused by the weight being concentrated on one side of the outer door, and ensure that the vertical pressure of the two outer doors is stably borne, thereby minimizing the weight load borne by the hinges. This fundamentally reduces the stress concentration and metal fatigue of the hinges during transportation bumps, and effectively avoids the risk of hinge deformation, outer door warping or falling.

[0018] Preferably, a wind hook lock plate is provided on the lower inner side of the outer door, and the lower end face of the wind hook lock plate is higher than the upper end face of the transformer substation threshold.

[0019] Beneficial effect: The design of the lower end of the wind hook lock plate being higher than the upper end of the transformer substation threshold avoids contact and collision with the threshold during the opening and closing of the transformer substation's outer door. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view at point C; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention.

[0021] The markings in the accompanying drawings include: 1. Outer door frame; 2. Left outer door; 3. Right outer door; 4. Hinge mounting hole; 5. Transformer door threshold; 6. Transformer door base; 7. Left door anti-fall device; 8. Right door anti-fall device; 9. Anti-fall device bracket; 10. Bearing; 11. Roller; 12. Mounting through hole; 51. Fixing part; 52. Support part; 13. Limiting block; 14. Clearance groove; 91. Bracket fixing part; 92. Roller mounting part; 15. Wind hook lock plate. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method: See Figures 1 to 4 A device for preventing the outer door of a box-type substation from falling off is provided. The side of the outer door is hinged to the outer door frame 1. The device includes a support bracket 9 for preventing the falling off. The support bracket 9 is installed on the lower inner side of the outer door, away from the connection point between the outer door and the box body. A roller 11 is supported on the support bracket 9 by a bearing 10. The roller 11 makes rolling contact with the threshold 5 of the box-type substation, thus providing support for the outer door.

[0023] Specifically, hinge mounting holes 4 are provided on the side of the outer door and the outer door frame 1. The threshold 5 of the transformer substation is set on the base 6 of the transformer substation.

[0024] A limiting block 13 is provided at the lower part of the outer door, and the limiting block 13 abuts against the outer side of the transformer substation threshold 5. The inner side of the limiting block 13 is provided with a clearance groove 14, the opening direction of the clearance groove 14 is inward. The transformer substation threshold 5 includes a fixing part 51 and a supporting part 52. The fixing part 51 is fixedly connected to the box body. The supporting part 52 extends upward, and the upper end face of the supporting part 52 rolls with the roller 11. The outer side of the supporting part 52 extends into the clearance groove 14, and the outer side abuts against the bottom of the clearance groove 14.

[0025] The roller 11 is a nylon roller, specifically made of PA66 nylon material by injection molding, with an outer diameter of 60mm, an inner diameter of 47mm, and a thickness of 15mm. The outer surface of the roller 11 is rounded (3mm radius) to avoid stress concentration when in contact with the transformer door threshold 5. The nylon roller has a Shore hardness of D75, combining wear resistance and elasticity, and can withstand long-term crushing of a single door weighing 55kg without plastic deformation.

[0026] A stud is fixedly connected to the outer door, and the anti-fall device bracket 9 is provided with a mounting through hole 12. The stud passes through the mounting through hole and engages with a nut to fix the anti-fall device bracket 9 to the outer door. The stud and the outer door can be welded or integrally formed. This embodiment adopts the welding method. The welding method allows for the simple improvement of old cabinet doors to apply the anti-fall device of this utility model.

[0027] The anti-drop device bracket 9 includes a bracket fixing part 91 and a roller mounting part 92. The bracket fixing part 91 is provided with a mounting through hole 12, and the roller mounting part 92 is provided with a mounting groove. The groove wall supports the bearing 10, and the outer ring of the bearing 10 is mounted on the roller 11. The inner ring of the roller 11 is interference-fitted with the outer ring of the bearing 10.

[0028] The bearing 10 is a deep groove ball bearing, and in this embodiment, the model is 6204.

[0029] The outer door includes a left outer door 2 and a right outer door 3. Anti-fall devices are symmetrically installed at the lower right corner of the left outer door 2 and the lower left corner of the right outer door 3. A left door anti-fall device 7 is installed on the left outer door 2, and a right door anti-fall device 8 is installed on the right outer door 3.

[0030] A wind hook lock plate 15 is provided on the lower inner side of the outer door, and the lower end of the wind hook lock plate 15 is higher than the upper end of the transformer substation threshold 5.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for preventing the outer door of a prefabricated substation from falling off, wherein the side of the outer door is hinged to the outer door frame, characterized in that: The device includes an anti-fall device bracket, which is installed on the lower inner side of the outer door, away from the connection point between the outer door and the enclosure. A roller is supported on the anti-fall device bracket by a bearing, and the roller makes rolling contact with the threshold of the transformer substation, thus providing support for the outer door.

2. The anti-fall device for the outer door of the prefabricated substation according to claim 1, characterized in that: A limiting block is provided at the lower part of the outer door, and the limiting block abuts against the outer side of the transformer substation threshold.

3. The anti-fall device for the outer door of the prefabricated substation according to claim 2, characterized in that: The inner side of the limiting block is provided with a clearance groove, the opening direction of the clearance groove is inward. The transformer threshold includes a fixing part and a supporting part. The fixing part is fixedly connected to the transformer body. The supporting part extends upward. The upper end face of the supporting part rolls with the roller, and the outer side face abuts against the bottom of the clearance groove.

4. The anti-fall device for the outer door of the prefabricated substation according to claim 1, characterized in that: The rollers are made of nylon.

5. The anti-fall device for the outer door of the prefabricated substation according to claim 1, characterized in that: The outer door is fixedly connected with studs, and the anti-fall device bracket is provided with a mounting through hole. The studs pass through the mounting through hole and cooperate with the nut to fix the anti-fall device bracket on the outer door.

6. The anti-fall device for the outer door of the prefabricated substation according to claim 1, characterized in that: The outer door includes a left outer door and a right outer door, with anti-fall devices symmetrically installed at the lower right corner of the left outer door and the lower left corner of the right outer door.

7. The anti-fall device for the outer door of the prefabricated substation according to claim 1, characterized in that: A wind hook lock plate is provided on the lower inner side of the outer door, and the lower end of the wind hook lock plate is higher than the upper end of the transformer substation threshold.

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