Three-phase dry-type non-excitation voltage-regulating distribution transformer

Abstract

The utility model discloses a three-phase dry-type non-excitation voltage regulation distribution transformer, the three-phase dry-type non-excitation voltage regulation distribution transformer comprises a base and a plurality of coil windings arranged on the base, the bottom of each coil winding is provided with a damping assembly, and each damping assembly comprises a damping cushion block and a supporting seat. The damping cushion block is provided with a concave cavity capable of containing a coil winding, a plurality of telescopic damping rods are evenly distributed on the damping cushion block with a circle point as the axis, the supporting base is provided with buffer rods corresponding to the damping rods, the buffer rods are arranged on the outer walls of the damping rods in a sleeving mode, and first springs are arranged between the buffer rods and the damping rods. And guide rods are arranged at four corners of the supporting seat. The damping assembly is arranged at the bottom of the coil winding, under the condition that the size of a product is not changed, the damping effect is achieved, the size needed by the damping device is greatly reduced, and therefore the damping device is suitable for a place with a small installation space, and the product has the advantages that the overall size is reduced, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a three-phase dry-type non-excitation voltage-regulating distribution transformer. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-voltage buildings, airports, docks, CNC machinery and other places. Simply put, a dry-type transformer refers to a transformer whose core and winding are not immersed in insulating oil.

[0003] According to the "Three-phase Dry-type Off-excitation Voltage-regulating Distribution Transformer" with authorization announcement number CN219778634U, a three-phase dry-type off-excitation voltage-regulating distribution transformer is disclosed. The three-phase dry-type off-excitation voltage-regulating distribution transformer includes a dry-type transformer, a shock-absorbing platform, a base, a shock-absorbing assembly, and bolts. The dry-type transformer is mounted and fixed on the base. A protrusion is provided in the center of the base and contacts the shock-absorbing assembly. The shock-absorbing platform is provided with a hollow first guide pillar. The shock-absorbing assembly is mounted and fixed inside the first guide pillar. Hollow second guide pillars are provided at the four corners of the shock-absorbing platform. The second guide pillar is provided with a first spring. The utility model uses a hydraulic cylinder to change the spring damping coefficient of the shock-absorbing assembly, and bolts to keep the shock-absorbing assembly and the shock-absorbing platform fixed for a long time. In order to ensure that the base is affected by the change in the spring damping coefficient, an anti-detachment assembly is used to make the base and the shock-absorbing platform more tightly connected, so that the product has the advantages of good stability, a wide range of applications, and good shock absorption effect.

[0004] However, the above technical solution has the problem that the shock-absorbing platform is large in size and occupies a large space for installation, which makes it unsuitable for use in places with smaller spaces. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the technical solutions proposed in the above background technology and to provide a product with reduced overall volume and reduced noise.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] A three-phase dry-type non-excitation voltage-regulating distribution transformer includes a base and several coil windings arranged on the base. A shock-absorbing assembly is provided at the bottom of the coil winding. The shock-absorbing assembly includes a shock-absorbing pad and a support seat. The shock-absorbing pad is provided with a cavity that can accommodate the coil winding. The shock-absorbing pad is evenly distributed with several retractable damping rods around a circle as the axis. The support seat is provided with a buffer rod corresponding to the damping rod. The buffer rod is sleeved on the outer wall of the damping rod. A first spring is provided between the buffer rod and the damping rod. Guide rods are provided at the four corners of the support seat and pass through the shock-absorbing pad. The end face of the guide rod is provided with a limit assembly. The guide rod is provided with a second spring and acts on the shock-absorbing pad.

[0008] Preferably, a shock-absorbing pad is attached to the outer wall of the guide rod, and the second spring is arranged on the outer wall of the shock-absorbing pad.

[0009] Preferably, the shock-absorbing pad is provided with an annular extension portion, and is arranged between the support seat and the shock-absorbing pad. The outer wall of the extension portion is provided with several equally spaced skirts from top to bottom. The four corners of the shock-absorbing pad are provided with first through holes for the guide rod to pass through, and a distance is provided between the first through hole and the shock-absorbing pad.

[0010] Preferably, the buffer rod is provided with a blind hole capable of accommodating the damping rod, and limiting through holes are provided on both sides of the blind hole.

[0011] Preferably, protruding columns are provided on both sides of the damping rod and are slidably arranged in the limiting through hole.

[0012] Preferably, the damping rod is hinged to the shock-absorbing pad, the buffer rod is hinged to the support seat, the damping rod and the buffer rod are provided with a support portion, and both ends of the first spring abut against the support portion.

[0013] Preferably, an iron yoke is provided between the coil windings, and the support seat and the shock-absorbing pad are provided with a second through hole for the iron yoke to pass through.

[0014] Preferably, the limiting assembly includes an insulating gasket, a washer, a spring washer, and a fastening screw. The insulating gasket, gasket, and spring washer abut against the end face of the guide rod in sequence. The fastening screw is threadedly connected to the guide rod and abuts against the spring washer.

[0015] Beneficial effects:

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The present invention provides a shock-absorbing component at the bottom of the coil winding. Without changing the volume of the three-phase dry-type non-excitation voltage-regulating distribution transformer, it not only has a shock-absorbing effect but also greatly reduces the volume required for the shock-absorbing device. Thus, the utility model is suitable for places with small installation space and overcomes the problems raised by the background technology, so that the product has the advantage of reduced overall volume.

[0018] (2) The utility model absorbs the radial irregular movement generated by the operation of the coil winding through the damping rod, the buffer rod and the first spring, thereby preventing the guide rod from hitting the first through hole and generating noise; when the coil winding is running, the shock-absorbing pad will move up and down and shake, and the second spring will absorb its energy to achieve the shock-absorbing effect, and the shock-absorbing pad will prevent the shock-absorbing pad from hitting the gasket and generating noise, so that the product has the advantage of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a three-phase dry-type non-excitation voltage-regulating distribution transformer of the utility model;

[0020] Figure 2 This is a side cross-sectional diagram of a three-phase dry-type non-excitation voltage-regulating distribution transformer of the utility model. Figure 1 ;

[0021] Figure 3 For this utility model Figure 2 A partial enlarged diagram of a three-phase dry-type non-excitation voltage-regulating distribution transformer;

[0022] Figure 4 This is a side cross-sectional diagram of a three-phase dry-type non-excitation voltage-regulating distribution transformer of the utility model. Figure 2 ;

[0023] Figure 5 For this utility model Figure 4 A partial enlarged diagram of a three-phase dry-type non-excitation voltage-regulating distribution transformer B;

[0024] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0025] Reference numerals: 1, base; 2, coil winding; 3, shock-absorbing assembly; 4, shock-absorbing pad; 5, support seat; 6, first spring; 7, limit assembly; 8, support portion; 9, second through hole;

[0026] 21. Iron yoke;

[0027] 41. concave cavity; 42. damping rod; 43. extension portion; 44. first through hole;

[0028] 421, convex column;

[0029] 431, hem;

[0030] 51. Buffer rod; 52. Guide rod; 53. Second spring; 54. Shock pad;

[0031] 511, blind hole; 512, limit through hole;

[0032] 71. Insulating pad; 72. Gasket; 73. Spring washer; 74. Fastening screw. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. 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.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0036] Reference example Figures 1 to 5A three-phase dry-type non-excitation voltage-regulating distribution transformer comprises a base 1 and a plurality of coil windings 2 arranged on the base 1. A shock-absorbing assembly 3 is provided at the bottom of the coil winding 2. The shock-absorbing assembly 3 comprises a shock-absorbing pad 4 and a support seat 5. The shock-absorbing pad 4 is provided with a concave cavity 41 for accommodating the coil winding 2. The shock-absorbing pad 4 is evenly distributed with a plurality of retractable damping rods 42 with a circular point as the axis. The support seat 5 is provided with a buffer rod 51 corresponding to the damping rod 42. The buffer rod 51 is sleeved on the outer wall of the damping rod 42. A first spring 6 is provided between the buffer rod 51 and the damping rod 42. Guide rods 52 are provided at the four corners of the support seat 5 and pass through the shock-absorbing pad 4. A limit assembly 7 is provided on the end face of the guide rod 52. The guide rod 52 is provided with a second spring 53 and acts on the shock-absorbing pad 4. By arranging the shock-absorbing assembly 3 at the bottom of the coil winding 2, without changing the volume of the three-phase dry-type non-excitation voltage-regulating distribution transformer, not only a shock-absorbing effect is achieved but also the volume required for the shock-absorbing device is greatly reduced, thereby being suitable for places with small installation space; when the coil winding 2 is running, it produces radial irregular movement, and the damping rod 42, the buffer rod 51 and the first spring 6 absorb the irregular vibration, thereby reducing the range of movement of the guide rod 52 in the first through hole 44, thereby preventing the guide rod 52 from hitting the first through hole 44 and generating noise; when the coil winding 2 is running, the shock-absorbing pad 4 produces up and down movement or vibration, and the second spring 53 absorbs its energy, thereby achieving a shock-absorbing effect, and the shock-absorbing pad prevents the shock-absorbing pad 4 from hitting the gasket 72 and generating noise;

[0037] It is worth mentioning that a shock-absorbing pad 54 is attached to the outer wall of the guide rod 52, and the second spring 53 is arranged on the outer wall of the shock-absorbing pad 54. When the coil winding 2 moves radially due to vibration, the shock-absorbing pad 54 prevents the metal material of the guide rod 52 from hitting the first through hole 44, thereby further reducing noise.

[0038] It is worth mentioning that the shock-absorbing pad 4 is provided with an annular extension portion 43 and is arranged between the support seat 5 and the shock-absorbing pad 4. The outer wall of the extension portion 43 is provided with a plurality of equally spaced skirts 431 from top to bottom. The four corners of the shock-absorbing pad 4 are provided with first through holes 44 for the guide rod 52 to pass through. There is a distance between the first through holes 44 and the shock-absorbing pad 54. The extension portion 43 not only provides support for the skirt 431, but also limits the sinking distance of the shock-absorbing pad 54, thereby protecting the second spring 53. The skirt 431 increases the creepage distance and improves safety. The spacing provides space for the shock-absorbing pad 4 to generate radial movement.

[0039] It is worth mentioning that the buffer rod 51 is provided with a blind hole 511 for accommodating the damping rod 42, and two sides of the blind hole 511 are provided with limiting through holes 512, which limit the extension distance of the damping rod 42;

[0040] It is worth mentioning that the damping rod 42 is provided with protruding columns 421 on both sides, and is slidably arranged in the limiting through hole 512, and the protruding columns 421 cooperate with the limiting through hole 512;

[0041] It is worth mentioning that the damping rod 42 is hinged to the shock absorbing pad 4, and the buffer rod 51 is hinged to the support seat 5. The damping rod 42 and the buffer rod 51 are provided with a support portion 8. Both ends of the first spring 6 abut against the support portion 8. The support portion 8 of the buffer rod 51 provides a support point for the first spring 6. The elastic force released by the first spring 6 is provided by the support portion 8 of the damping rod 42 and transmitted to the damping rod 42.

[0042] It is worth mentioning that an iron yoke 21 is provided between the coil windings 2, and the support base 5 and the shock-absorbing pad 4 are provided with a second through hole 9 for the iron yoke 21 to pass through. The iron yoke 21 is an important component of the magnetic circuit of the coil winding 2, and its main function is to ensure the closure of the magnetic circuit;

[0043] It is worth mentioning that the limiting assembly 7 includes an insulating gasket 71, a washer 72, a spring washer 73, and a fastening screw 74. The insulating gasket 71, the gasket 72, and the spring washer 73 abut the end face of the guide rod 52 in sequence. The fastening screw 74 is threadedly connected to the guide rod 52 and abuts the spring washer 73. The spring washer 73 ensures that the thread of the fastening screw 74 fits tightly with the thread groove of the guide rod 52, increases friction, and plays an anti-loosening role. The gasket 72 prevents the spring washer 73 from damaging the insulating gasket 71. At the same time, the gasket 72 enables the force of the spring washer 73 to act on the insulating gasket 71 to the maximum extent.

[0044] The above design scheme can make the product have the advantages of reducing overall volume and lowering noise.

[0045] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A three-phase dry-type non-excitation voltage-regulating distribution transformer, comprising a base (1), and a plurality of coil windings (2) arranged on the base (1), wherein a shock absorbing assembly (3) is provided at the bottom of the coil windings (2), characterized in that: The shock absorbing assembly (3) comprises a shock absorbing pad (4) and a support seat (5). The shock absorbing pad (4) is provided with a concave cavity (41) capable of accommodating the coil winding (2). The shock absorbing pad (4) is provided with a plurality of retractable damping rods (42) evenly distributed around a circle as an axis. The support seat (5) is provided with a buffer rod (51) corresponding to the damping rod (42). The buffer rod (51) is sleeved on the outer wall of the damping rod (42). A first spring (6) is provided between the buffer rod (51) and the damping rod (42). Guide rods (52) are provided at the four corners of the support seat (5) and pass through the shock absorbing pad (4). A limit assembly (7) is provided on the end surface of the guide rod (52). The guide rod (52) is provided with a second spring (53) and acts on the shock absorbing pad (4).

2. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 1, characterized in that: A shock-absorbing pad (54) is attached to the outer wall of the guide rod (52), and the second spring (53) is arranged on the outer wall of the shock-absorbing pad (54).

3. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 2, characterized in that: The shock-absorbing pad (4) is provided with an annular extension portion (43) and is arranged between the support seat (5) and the shock-absorbing pad (4); the outer wall of the extension portion (43) is provided with a plurality of skirts (431) at equal intervals from top to bottom; the four corners of the shock-absorbing pad (4) are provided with first through holes (44) for the guide rod (52) to pass through; and a distance is provided between the first through holes (44) and the shock-absorbing pad (54).

4. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 3, characterized in that: The buffer rod (51) is provided with a blind hole (511) capable of accommodating the damping rod (42), and limiting through holes (512) are provided on both sides of the blind hole (511).

5. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 4, characterized in that: The damping rod (42) is provided with protruding columns (421) on both sides, and is slidably arranged in the limiting through hole (512).

6. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 5, characterized in that: The damping rod (42) is hinged to the shock-absorbing pad (4), and the buffer rod (51) is hinged to the support seat (5). The damping rod (42) and the buffer rod (51) are provided with a support portion (8), and both ends of the first spring (6) abut against the support portion (8).

7. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to claim 5, characterized in that: An iron yoke (21) is provided between the coil windings (2), and the support seat (5) and the shock-absorbing pad (4) are provided with a second through hole (9) for the iron yoke (21) to pass through.

8. The three-phase dry-type off-excitation voltage-regulating distribution transformer according to any one of claims 2 to 7, characterized in that: The limiting assembly (7) comprises an insulating gasket (71), a washer (72), a spring washer (73), and a fastening screw (74); the insulating gasket (71), the gasket (72), and the spring washer (73) sequentially abut against the end surface of the guide rod (52); and the fastening screw (74) is threadedly connected to the guide rod (52) and abuts against the spring washer (73).

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