Device for replacing insulating cushion block of dry-type transformer winding

Abstract

The utility model relates to the technical field of subway power supply systems, in particular to a device for replacing a winding insulation cushion block of a dry-type transformer. The replacing device for the dry-type transformer winding insulation cushion block specifically comprises a base, a clamping device, a linkage rod and two jacking devices. The jacking device is connected with the base, and the clamping device is fixedly connected with the jacking device; the jacking device comprises a connecting screw rod, speed reducers and a rocking handle, the two ends of the linkage rod are connected with the two speed reducers respectively, the connecting screw rod is connected with the speed reducers, and the rocking handle is connected with the speed reducers; the clamping device comprises a clamping groove and a supporting cushion block, the supporting cushion block is located in the clamping groove, and the clamping groove is connected with the connecting screw rod. The utility model has the advantage of high replacement efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of subway power supply systems, in particular to a device for replacing insulating spacers of dry-type transformer windings. Background Art

[0002] Dry-type transformers are widely used in subway medium-voltage power supply systems. Their unique feature is that the core and windings are not immersed in insulating oil, relying primarily on natural or forced air cooling for heat dissipation. However, dry-type transformer failure rates increase over time. Discharge from high-voltage windings to insulating pads due to aging insulation or humid environments is a common occurrence across the entire network.

[0003] In order to prevent short circuit faults caused by discharge of high-voltage winding to insulating pads, when serious discharge of high-voltage winding to insulating pads occurs in dry-type transformer, high-voltage winding insulating pads need to be replaced in time. If they are not replaced in time, the transformer winding may discharge to the iron core, affecting the safe operation of the transformer.

[0004] The current replacement method is to manually replace the insulating spacers, which is not only inefficient but also prone to errors.

[0005] Therefore, in view of the shortcomings of the prior art, a device for replacing insulating spacers of dry-type transformer windings is provided. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a replacement device for insulating spacers of dry-type transformer windings, aiming to solve the problem of low replacement efficiency.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A replacement device for a dry-type transformer winding insulation pad comprises: a base, a clamping device, a linkage rod and two lifting devices;

[0009] The jacking device is connected to the base, and the clamping device is fixedly connected to the jacking device;

[0010] The lifting device includes a connecting screw, a reducer and a crank, the two ends of the linkage rod are respectively connected to the two reducers, the connecting screw is connected to the reducer, and the crank is connected to the reducer;

[0011] The clamping device includes a clamping groove and a supporting pad. The supporting pad is located in the clamping groove, and the clamping groove is connected to the connecting screw.

[0012] As a further improvement of the technical solution of the present invention, a level is also included, and the level is connected to the base.

[0013] As a further improvement of the technical solution of the present invention, the support block is in contact with or separated from the winding, and a plurality of protrusions adapted to the winding are provided on the upper surface of the support block.

[0014] As a further improvement of the technical solution of the present invention, the base includes a first through hole and a second through hole located at both ends, and the two connecting screws are respectively inserted into the first through hole and the second through hole.

[0015] As a further improvement of the technical solution of the present utility model, the second through hole is in the shape of an elongated strip.

[0016] As a further improvement of the technical solution of the present utility model, the reducer is a hand-cranked micro screw reducer.

[0017] As a further improvement of the technical solution of the present utility model, the clamping groove is C-shaped.

[0018] As a further improvement of the technical solution of the present utility model, the base is hollow.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this utility model, the replacement device for insulating spacers in dry-type transformer windings identifies the insulating spacer to be replaced and places the device beneath the transformer winding. Two lifting devices operate simultaneously under the action of a linkage rod. The handle is then cranked, and the connecting screw, driven by a reducer, simultaneously moves the two supporting spacers upward, lifting the transformer winding. The old insulating spacer is then removed using a tool and the new one inserted into the correct position, completing the replacement. This dry-type transformer winding insulating spacer replacement device boasts high replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technology of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a replacement device for a dry-type transformer winding insulation spacer according to the present invention;

[0023] Figure 2 This is a front view of a replacement device for insulating spacers of dry-type transformer windings according to the present invention;

[0024] Figure 3 This is a left side view of a replacement device for insulating spacers of dry-type transformer windings according to the present invention;

[0025] Figure 4 The utility model is a cross-sectional view of a base in a replacement device for insulating spacers of dry-type transformer windings.

[0026] In the picture:

[0027] 1. Base; 11. First through hole; 12. Second through hole;

[0028] 2. Clamping device; 21. Clamping groove; 22. Support pad;

[0029] 3. Linkage rod;

[0030] 4. Lifting device; 41. Connecting screw; 42. Speed ​​reducer; 43. Crank handle;

[0031] 5. Level. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0033] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, terms such as "upper," "lower," "left," and "right" used in this disclosure are intended solely to describe the relative positions of the components of the disclosure as shown in the accompanying drawings.

[0034] Reference Figures 1 to 4 , a replacement device for a dry-type transformer winding insulation spacer, comprising a base 1, a clamping device 2, a linkage rod 3 and two jacking devices 4;

[0035] The lifting device 4 is connected to the base 1, and the clamping device 2 is fixedly connected to the lifting device 4; the lifting device 4 includes a connecting screw 41, a reducer 42, and a crank 43. The two ends of the linkage rod 3 are respectively connected to the two reducers 42, the connecting screw 41 is connected to the reducer 42, and the crank 43 is connected to the reducer 42; the clamping device 2 includes a clamping groove 21 and a support block 22, the support block 22 is located in the clamping groove 21, and the clamping groove 21 is connected to the connecting screw 41. Preferably, due to the different sizes of the transformers, the distance between the two platforms needs to be adjusted, so the linkage rod 3 also has a telescopic function.

[0036] Among them, when working, confirm the insulating pad that needs to be replaced, and place the device under the transformer winding; under the action of the linkage rod 3, the two lifting devices 4 work at the same time. Then shake the handle 43, and under the action of the reducer 42, the connecting screw 41 drives the two supporting pads 22 to move upward at the same time to lift the transformer winding; then use the tool to remove the old insulating pad, and insert the new insulating pad into the correct position to complete the replacement. This device for replacing the insulating pad of the dry-type transformer winding has the characteristics of high replacement efficiency. During the replacement process, the device can ensure the safety of the operator and avoid the occurrence of accidents; timely replacement of aging insulating pads can effectively extend the service life of the transformer; it is suitable for dry-type transformers of various types and specifications and has strong versatility.

[0037] In one embodiment, a spirit level 5 is also included, which is connected to the base 1 to ensure that when the connecting screw 41 is lifted, the support block 22 is in contact with the transformer winding at the same time, to prevent only one end of the transformer winding from being lifted, resulting in uneven support. The support block 22 is in contact with or separated from the winding, and the upper surface of the support block 22 is provided with a number of protrusions adapted to the winding to increase the contact area with the transformer winding. The base 1 is hollow. The working principle of the lifting device 4: by manually shaking the crank handle 43, the crank handle 43 drives the connecting screw 41 to move up and down along its length direction through the reducer 42, and the lower end of the connecting screw 41 passes through the first through hole 11 and the second through hole 12, and then extends into the base 1.

[0038] In one embodiment, referring to Figure 4 As shown, the base 1 includes a first through hole 11 and a second through hole 12 at either end. Two connecting screws 41 are inserted into the first through hole 11 and the second through hole 12, respectively. The second through hole 12 is elongated. Due to the varying sizes of transformer windings, the spacing between the two through holes varies, facilitating adjustment of their positions.

[0039] In one embodiment, the reducer 42 is a hand-cranked micro screw reducer 42 .

[0040] In one embodiment, the clamping groove 21 is C-shaped, and the support pad 22 is placed in the clamping groove 21. Since the support pad 22 is relatively thin, it needs to be limited by the two ends of the C-shape to prevent the support pad 22 from tipping over.

[0041] Similarly, the application scope of this replacement device can involve power systems, substations, distribution networks and other fields. In these fields, dry-type transformers are one of the common equipment, and the replacement of winding insulation spacers is an important part of maintaining the normal operation of transformers. Therefore, this device has broad application prospects in these fields. Specifically, the device is suitable for various types of dry-type transformers, such as oil-immersed transformers, vacuum pressure impregnation (VPI) transformers, etc. During the long-term operation of these transformers, the winding insulation spacers may experience problems such as aging and wear, and need to be replaced to ensure the safe and stable operation of the transformer. In terms of application, the device has performed well in actual applications, and can quickly and accurately complete the replacement of insulation spacers, thereby improving work efficiency and safety. At the same time, the device has strong versatility and is suitable for transformers of various specifications and models, making it convenient for maintenance personnel to use.

[0042] This replacement device offers high economic benefits. Its production cost is low, and the entire set can be manufactured for less than 1,200 yuan. The process is relatively easy, with high production efficiency, allowing for rapid implementation and effective operation. Analysis of transformer failure records on existing lines shows that approximately six similar failures occur annually, requiring six personnel to repair each failure. Using this replacement device can save two personnel per insulation spacer replacement, saving a total of 12 personnel per year, at approximately 600 yuan per night. Based on a 10-year lifespan, the total savings are: 2 personnel / operation * 6 operations / year * 600 yuan per night * 10 years = 72,000 yuan. The cost-effectiveness ratio is calculated as: (72,000 - 0) / 1,200 = 60 * 5 = 300.

[0043] For other contents of the replacement device for the insulation spacer of the dry-type transformer winding described in the present invention, please refer to the prior art and will not be repeated here.

[0044] The above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A device for replacing insulating spacers of dry-type transformer windings, characterized in that: include: Base, clamping device, linkage rod and two jacking devices; The jacking device is connected to the base, and the clamping device is fixedly connected to the jacking device; The lifting device includes a connecting screw, a reducer and a crank, the two ends of the linkage rod are respectively connected to the two reducers, the connecting screw is connected to the reducer, and the crank is connected to the reducer; The clamping device includes a clamping groove and a supporting pad. The supporting pad is located in the clamping groove, and the clamping groove is connected to the connecting screw.

2. The device for replacing the insulation spacer of the dry-type transformer winding according to claim 1, characterized in that: Also included is a level connected to the base.

3. The device for replacing the insulation spacer of a dry-type transformer winding according to claim 1, characterized in that: The support block is in contact with or separated from the winding, and a plurality of protrusions adapted to the winding are provided on the upper surface of the support block.

4. The device for replacing the insulation spacer of a dry-type transformer winding according to claim 1, characterized in that: The base includes a first through hole and a second through hole at both ends, and the two connecting screws are respectively inserted into the first through hole and the second through hole.

5. The device for replacing the insulation spacer of the dry-type transformer winding according to claim 4, characterized in that: The second through hole is in a strip shape.

6. The device for replacing the insulation spacer of a dry-type transformer winding according to claim 1, characterized in that: The reducer is a hand-cranked micro screw reducer.

7. The device for replacing the insulation spacer of a dry-type transformer winding according to claim 1, characterized in that: The clamping groove is C-shaped.

8. The device for replacing the insulation spacer of a dry-type transformer winding according to claim 1, characterized in that: The base is hollow.

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