Dry-type transformer safety drawer suitable for narrow side face

Abstract

The utility model discloses a dry-type transformer safety drawer suitable for narrow side surfaces, which comprises two groups of fan drawers, each group of fan drawers comprises two equal-length guide rails and a bearing plate formed by splicing a first handle plate, a first fan bottom plate, a second fan bottom plate, a third fan bottom plate and a second handle plate, the two sides of the bearing plate are inserted into the two equal-length guide rails respectively, the two equal-length guide rails are fixed to ground feet of the dry-type transformer shell, and drawer openings are formed in the shell wall, corresponding to each set of fan drawers, of the dry-type transformer shell and used for allowing the bearing plate on the corresponding side to go in and out. According to the dry-type transformer safety drawer suitable for the narrow side face, the draught fan on each side is fixed to the bearing plate which can be detached into a plurality of units, the bearing plate can be detached every time one draught fan is pulled out more conveniently, the draught fans are pushed back in sequence after being replaced, the bearing plate can be limited in the vertical direction through the guide rails, and the safety of the dry-type transformer safety drawer is improved. In this way, danger caused by accidental upwarping can be avoided during pulling out.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a safety drawer suitable for dry-type transformers with narrow sides. Background Art

[0002] Dry-type transformers boast a simple structure and easy installation, making them widely used in areas such as local lighting, high-rise buildings, airports, CNC machinery at ports, and factory power supplies. Their cores and windings are not immersed in insulating oil but rather in air, where they are cooled by six fans located on either side of the dry-type transformer windings. Because the fans are enclosed within the dry-type transformer casing, a fan failure requires replacement without shutting down the transformer.

[0003] There is a Chinese patent CN209880341U that designs a drawer-type installed fan with a hole on the front. This design is suitable for newly produced dry-type transformers. The modification will cause great damage to the outer shell of the dry-type transformer and is not suitable for the modification of existing equipment. CN215578081U designs a drawer-type installed fan with a side opening. This design only requires a small hole on the side (a hole that can accommodate the cross-section of the fan) to pull out the fan. However, this solution has a rigid defect. Since the drawers with three fans strung together in a line are basically more than 2.5 meters long, when the external side space of the dry-type transformer is small, the drawer will be halfway pulled out and hit the wall or obstacle. In addition, this solution has no restrictions in the vertical direction. Improper operation when dragging the drawer out will cause the back half to tilt up and cause a malfunction.

[0004] Therefore, it is necessary to propose a dry-type safety drawer suitable for narrow sides to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is that a new safety drawer suitable for dry-type transformers with narrow sides is proposed, in order to solve the problem that the dry-type transformer fan is sealed inside the dry-type transformer shell. When the fan fails, the dry-type transformer cannot be replaced without power outage.

[0006] In order to solve the above technical problems, the utility model provides a dry-type transformer safety drawer suitable for narrow sides, comprising: two groups of fan drawers, located in the dry-type transformer casing, and respectively arranged on both sides of the dry-type transformer winding, each group of fan drawers includes two equal-length guide rails and a bearing plate composed of a first handle plate, a first fan base plate, a second fan base plate, a third fan base plate, and a second handle plate, the two sides of the bearing plate are respectively inserted into the guide rails of the two equal-length guide rails and are slidably connected to the equal-length guide rails, the two equal-length guide rails are fixed on the ground feet of the dry-type transformer casing, and a drawer opening is opened on the shell wall of the dry-type transformer casing corresponding to each group of fan drawers for accommodating the bearing plate on the corresponding side to enter and exit.

[0007] Furthermore, the supporting plate includes a first handle plate, a first fan base plate, a second fan base plate, a third fan base plate, and a second handle plate which are detachably connected in sequence. The first handle plate and the second handle plate are both provided with hand holes. The first handle plate and the first fan base plate are connected by a hinge, and the second handle plate and the third fan base plate are connected by a hinge. The first fan base plate, the second fan base plate, and the third fan base plate are both provided with long waist holes for fixing the fan.

[0008] In a preferred embodiment of the present solution, the first fan base plate and the second fan base plate, and the second fan base plate and the third fan base plate are detachably connected via horizontal pin-type mortise and tenon joints.

[0009] In a preferred embodiment of the present solution, the first fan base plate and the second fan base plate, and the second fan base plate and the third fan base plate are detachably connected via locks.

[0010] The implementation of this utility model has the following beneficial effects:

[0011] This device is suitable for dry-type variable safety drawers with narrow sides. The fans on each side are fixed on a carrier plate that can be disassembled into multiple units. The two ends of the carrier plate are slidably connected to two equal-length guide rails. It is more convenient to pull out the carrier plate. Each time a fan is pulled out, it can be disassembled and pushed back one by one after replacement. The guide rail can limit the up and down direction of the carrier plate, and it can only slide along the track direction. In this way, there will be no danger due to accidental tilting when pulling it out. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the external structure of the dry-type transformer housing after the dry-type transformer safety drawer with narrow sides is installed in the dry-type transformer housing;

[0014] Figure 2 This is a schematic diagram of the internal structure of a dry-type transformer after the dry-type transformer safety drawer with narrow sides is installed in the dry-type transformer housing;

[0015] Figure 3 This is a schematic diagram of the top view of the fan drawer suitable for dry-type variable safety drawers with narrow sides;

[0016] Figure 4This is a top view of the structure of the fan drawer and the fan connection for a dry-type variable safety drawer with narrow sides;

[0017] Figure 5 Schematic diagram of the structure of the second handle plate;

[0018] Figure 6 Schematic diagram of the structure of the first fan base plate;

[0019] Figure 7 Schematic diagram of the structure of the second fan base plate;

[0020] Figure 8 Schematic diagram of the structure of equal-length guide rails.

[0021] In the figure: equal-length guide rails 1, first handle plate 2, first fan base plate 3, second fan base plate 4, third fan base plate 5, second handle plate 6, bearing plate 7, hand hole 8, hinge 9, long waist hole 10, fan 11, dry-type transformer housing 12, drawer opening 13, horizontal pin-type mortise and tenon joint 14 and base 15. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See Figure 1-2 , Figure 1 This is a schematic diagram of the external structure of the dry-type transformer housing after the dry-type transformer safety drawer with narrow sides is installed in the dry-type transformer housing; Figure 2 This is a schematic diagram of the internal structure of a dry-type transformer after the safety drawer for a narrow-sided dry-type transformer is installed within the dry-type transformer housing. The safety drawer for a narrow-sided dry-type transformer includes two sets of fan drawers, located within the dry-type transformer housing and positioned on either side of the dry-type transformer winding.

[0024] See Figure 3-4 , Figure 3 This is a schematic diagram of the top view of the fan drawer suitable for dry-type variable safety drawers with narrow sides; Figure 4This is a top-down diagram of the fan drawer and fan connection structure for a dry-type variable-safety drawer with narrow sides. Each fan drawer set includes two equal-length guide rails 1 and a carrier plate 7 composed of a first handle plate 2, a first fan base plate 3, a second fan base plate 4, a third fan base plate 5, and a second handle plate 6. The sides of the carrier plate 7 are inserted into the guide rails of the two equal-length guide rails 1 and are slidably connected to them.

[0025] See Figure 5-8 , Figure 5 Schematic diagram of the structure of the second handle plate; Figure 6 Schematic diagram of the structure of the first fan base plate; Figure 7 Schematic diagram of the structure of the second fan base plate; Figure 8 The specific structure of the bearing plate includes a first handle plate 2, a first fan base plate 3, a second fan base plate 4, a third fan base plate 5, and a second handle plate 6, which are detachably connected in sequence.

[0026] The first handle plate 2 and the second handle plate 6 are both provided with a hand hole 8 for facilitating manual pushing and pulling. The first handle plate 2 is connected to the first fan base plate 3 by a hinge 9, and the second handle plate 6 is also connected to the third fan base plate 5 by a hinge 9. The first fan base plate 3, the second fan base plate 4, and the third fan base plate 5 are all provided with a long waist hole 10 for fixing the fan 11. Two equal-length guide rails 1 are both fixed to the foot 15 of the dry-type transformer housing 12. The shell wall of the dry-type transformer housing 12 corresponding to each set of fan drawers is provided with a drawer opening 13 for accommodating the corresponding side load plate 7 to enter and exit.

[0027] In this embodiment, the first fan base plate 3 and the second fan base plate 4, and the second fan base plate 4 and the third fan base plate 5 are detachably connected via horizontal pin-type mortise and tenon joints 14. In other embodiments, they can also be detachably connected via locks.

[0028] In order to facilitate pulling and pulling, multiple rollers can be set on the bottom sides of the first fan base plate 3, the second fan base plate 4, and the third fan base plate 5 to facilitate pulling and pulling, and grooves for accommodating the rollers to pass through should also be set on the corresponding feet 15.

[0029] This dry-type transformer safety drawer, suitable for narrow sides, adopts a modular design, and the same model can be interchanged. A group of three fans, two handles, two fan bases (the first fan base and the third fan base), one fan base (the second fan base), and two equal-length guide rails complete the assembly of the fan drawer on one side of the dry-type transformer. The handle and the fan base A are movable connectors (such as hinges), and the two fan bases A and the fan base are spliced ​​with horizontal limiting mechanisms (such as yin-yang dovetail joints or locks). The fan is fixed with fasteners at the long waist hole of the fan base. The two guide rails are fixed to the foot, and the long rail can limit the up and down direction of the load-bearing plate, so that it can only slide along the direction of the rail, so that there will be no danger of accidental tilting when it is pulled out. Moreover, each fan can be disassembled when it is pulled out, and then pushed back one by one after replacement.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry-type safety drawer suitable for narrow sides, characterized by: include: Two groups of fan drawers are located in the dry-type transformer casing and are respectively arranged on both sides of the dry-type transformer winding. Each group of fan drawers includes two equal-length guide rails and a bearing plate composed of a first handle plate, a first fan base plate, a second fan base plate, a third fan base plate, and a second handle plate. The two sides of the bearing plate are respectively inserted into the guide rails of the two equal-length guide rails and are slidably connected to the equal-length guide rails. The two equal-length guide rails are fixed on the ground feet of the dry-type transformer casing. A drawer opening is opened on the shell wall of the dry-type transformer casing corresponding to each group of fan drawers to accommodate the entry and exit of the bearing plate on the corresponding side.

2. The dry-type safety drawer suitable for narrow side according to claim 1, characterized in that: The supporting plate includes a first handle plate, a first fan base plate, a second fan base plate, a third fan base plate, and a second handle plate which are detachably connected in sequence. The first handle plate and the second handle plate are both provided with hand holes. The first handle plate and the first fan base plate are connected by a hinge, and the second handle plate and the third fan base plate are connected by a hinge. The first fan base plate, the second fan base plate, and the third fan base plate are all provided with long waist holes for fixing the fan.

3. The dry-type safety drawer suitable for narrow side according to claim 2, characterized in that: The first fan base plate and the second fan base plate, as well as the second fan base plate and the third fan base plate are detachably connected via horizontal pin-type mortise and tenon joints.

4. The dry-type safety drawer suitable for narrow side according to claim 2, characterized in that: The first fan base plate and the second fan base plate, as well as the second fan base plate and the third fan base plate are detachably connected via locks.

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