CN201075337Y - Apparatus for integral sheathing and pressing voltage transformer body - Google Patents

Abstract

The utility model relates to a frock applied in transformer production, in particular to a complete frock for the whole body of a transformer and the device for holddown, which comprises an upper pressure plate arranged above the upper insulation pressure plate of the transformer body, a bracing piece arranged below the lower insulation pressure plate of the transformer body and a lower pressure plate arranged below the bracing piece. The upper pressure plate and the lower pressure plate are fixedly connected through rigging screws and fastening nuts, the center of the lower pressure plate is provided with a mounting hole for a positioner of the transformer body and the bottom of the positioner of the transformer body is matched with the mounting hole for the positioner of the transformer body. The utility model solves the concentricity of coils during the assembling process of the transformer body and the force problems of all coils, guarantees the even force of coils and good concentricity, meets the insulated electrical strength of products and improves the affordability of withstanding short-circuit, thereby ensuring the long-term and safe operation of products.

Description

The whole set of transformer body and the pressing device

technical field

The utility model relates to a tooling used in the production of a transformer, in particular to a whole set of a transformer body and a pressing device.

Background technique

The main operating performance of transformers includes dynamic stability and thermal stability. The quality of these two indicators directly affects the safety and reliability of transformer operation.

The transformer body is composed of upper end insulation, lower end insulation, high and low voltage and voltage regulating coils, main airway insulation between high and low voltage coils, etc. The existing transformer production process cannot guarantee the concentricity of the coil during the body assembly process. At the same time, there are a large number of insulating structural parts in the body of the transformer. The transformer produced by the existing process is affected by the electromagnetic force during operation. Mechanical vibration is generated. Under this long-term continuous external force, some components (such as coil pads, iron yoke insulation, etc.) will undergo plastic deformation-shrinkage, which will make the wire cakes loose and easily cause the wire cakes to move up and down. When the coil is wound, the transposition of the "S" bend in the span is improperly handled, so that a plane intersection point (that is, "scissors mouth") is formed between the transposed conductor and the secondary conductor, which is likely to cause a short circuit between turns. In addition, when a single-phase or three-phase short-circuit fault occurs in the external circuit, due to the influence of the short-circuit force, the coil will be deformed, displaced or even short-circuited due to the axial and radial forces, which is the so-called dynamic instability phenomenon. Thus affecting the safe operation of the product.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a whole set of transformer body and a compacting device, which solves the problem of concentricity in the assembly process of the transformer body and uniform stress on all windings in the single-phase body. In the manufacturing process of the transformer, the whole package of the transformer body and the pressing device of the utility model can be used to control the assembly quality of the transformer body, ensure that the coil is evenly stressed and has good concentricity, so that the product can meet the insulation electric strength and improve the product quality. The ability to resist short-circuit, so as to ensure the long-term safe operation of the product.

The technical solution adopted by the utility model to solve the technical problem is: a transformer body overall set and a pressing device, which has an upper pressing plate, a support, a body positioner, a lower pressing plate and a pull screw, and the upper pressing plate is arranged on the transformer body. Above the upper insulating pressing plate of the transformer body, the supporting member is arranged under the lower insulating pressing plate of the transformer body, the lower pressing plate is arranged under the supporting member, and the upper pressing plate is provided with at least four upper pressing plate installation holes, and the lower pressing plate corresponds to The mounting hole of the upper platen is provided with the mounting hole of the lower platen, the upper end of the pull screw passes through the mounting hole of the upper platen, the lower end of the pull screw passes through the mounting hole of the lower platen, and fastening nuts are installed at both ends of the pull screw; the center of the lower platen has a body positioning The bottom of the body locator is matched with the mounting hole of the body locator.

When in use, place the device body locator in the center of the lower platen to be in place, and the bottom of the device body locator matches with the installation hole of the device body locator. When the device body is assembled as a whole, use the device body locator to tighten and correct the installation center position of the coil and the upper insulating pressure plate and the lower insulating pressure plate to ensure good concentricity. After the overall assembly of the device body is completed, take out the device body positioner, install the pressure sensitive element and the upper pressure plate, and use the pull screw to compress the assembled single-phase device body. Hoist the assembled single-phase device body to the compactor for overall pressurization, and the pressure and pressure application time shall be carried out according to the design requirements.

In order to make the body locator easy to operate when the body is assembled as a whole, when the body locator is used to tighten and correct the installation center position of the coil and the upper insulating pressure plate and the lower insulating pressure plate, the body locator has an appropriate tension. The body locator described above is composed of a spreader, a face plate, a fixed bracket, a support plate, a main shaft, an operating handle and a chassis. The chassis is matched with the installation hole of the body locator on the lower pressure plate. The fixed bracket has a set of rods, a set of main struts and a set of auxiliary struts. The set of rods is set on the main shaft. They are respectively hinged to the upper part of a brace, one end of the auxiliary brace is hinged to the outer ring of the sleeve rod, and the other end is hinged to a brace respectively. The hinge point connecting the support rod and the support plate is located at the middle and lower part of the support plate, the operating handle is fixedly installed on the main shaft, the face plate is set on the upper part of the main shaft, the face plate and the main shaft are fixedly connected by a cover plate and pins, and the hanger is fixedly installed in the center of the upper surface of the face plate , the lower end of the main shaft is fixedly connected or rotationally connected with the chassis.

In order to further improve the positioning accuracy of the device body locator, the device body locator also has at least one set of auxiliary struts, a sliding sleeve is set on the sleeve rods, one end of the auxiliary struts is hinged with a support plate, and the auxiliary struts The other ends are all hinged with the sliding sleeve.

In order to achieve the purpose of adjusting the pressure when the transformer body is press-fitted according to the design requirements, a pressure-sensitive element is arranged between the upper end surface of the low-voltage coil and the high-voltage coil of the transformer body and the insulating lower surface of the upper iron yoke. After pressurization, check the color change of the pressure-sensitive element after pressurization and adjust the coil height.

The beneficial effect of the utility model is that the utility model solves the concentricity problem in the transformer body assembly process, thereby effectively ensuring the insulation distance between the coil and the iron core (to the ground), and ensuring that the transformer has sufficient electric strength from the assembly; at the same time The single-phase body is pre-pressed by a compactor, which can effectively solve the springback problem of the coil after drying, so that all coils in the single-phase body can bear the same pressure, ensuring that the body is compacted and compacted during final assembly. To prevent the wire cake from moving up and down due to the shrinkage of the insulating parts during the operation of the product, to ensure that the product has sufficient short-circuit resistance and dynamic stability, so that the product can run safely for a long time.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a reference diagram of the use state of the utility model when the body is set.

Fig. 2 is a reference diagram of the use state of the utility model when the whole body of the device is press-fitted.

Fig. 3 is a structural schematic diagram of the device body positioner in the utility model.

Fig. 4 is a view along the direction A of Fig. 3 .

In the figure 1. Upper platen, 1-1. Inspection hole, 2. Support, 3. Body locator, 3-1. Hanger, 3-2. Face plate, 3-3. Fixed bracket, 3-3- 1. Set pole, 3-3-2. Main strut, 3-3-3. Auxiliary strut, 3-3-4. Auxiliary strut, 3-3-5. Sliding sleeve, 3-4. Support plate , 3-5. Main shaft, 3-6. Operating handle, 3-7. Chassis, 4. Lower pressure plate, 4-1. Mounting hole for body locator, 5. Pull screw, 6. Upper insulating pressure plate, 7. Lower Insulation pressure plate, 8. Fastening nut, 9. Pressure sensitive element, 10. Base, 11. Upper iron yoke insulation, 12. Lower iron yoke insulation, 13. Low-voltage coil, 14. High-voltage coil, 15. Main channel insulation .

Detailed ways

As shown in Figures 1 to 4, the overall suit of the transformer body and the pressing device of the present invention have an upper pressing plate 1, a support member 2, a body positioner 3, a lower pressing plate 4 and a pulling screw 5, and the upper pressing plate 1 center Have inspection hole 1-1. The upper pressure plate 1 is arranged above the upper insulating pressure plate 6 of the transformer body, and a pressure sensitive element 9 and a support member are arranged between the upper end surface of the low voltage coil 13 and the high voltage coil 14 of the transformer body and the lower surface of the upper iron yoke insulation 11 2 is set under the lower insulating pressure plate 7 of the transformer body, the lower pressure plate 4 is set under the support 2, the upper pressure plate 1 is provided with mounting holes around the upper pressure plate 1, and the lower pressure plate 4 is provided at the place corresponding to the upper pressure plate installation hole The lower platen installation hole, the upper end of the pull screw 5 passes through the upper platen installation hole, the lower end of the pull screw 5 passes through the lower platen installation hole, the two ends of the pull screw 5 are equipped with fastening nuts 8; the bottom of the lower platen 4 is welded with a base 10, the lower platen 4 centers have device body locator mounting hole 4-1, and device body locator 3 bottoms cooperate with device body locator mounting hole 4-1.

As shown in Figures 3-4, the device body positioner has a spreader 3-1, a face plate 3-2, a fixed bracket 3-3, eight support plates 3-4, a main shaft 3-5, an operating handle 3-6 and a chassis. 3-7, the chassis 3-7 cooperates with the body locator mounting hole 4-1 on the lower platen 4, the fixed bracket 3-3 has a sleeve rod 3-3-1, and a group of main support rods 3-3-2 1. One group of auxiliary struts 3-3-3 and one group of auxiliary struts 3-3-4, the sleeve rod 3-3-1 is set on the main shaft 3-5, and one end of the main strut 3-3-2 is connected with the faceplate 3-2 hinged, the other end is hinged with the upper part of a brace 3-4, one end of the auxiliary brace 3-3-3 is hinged with the outer ring of the sleeve rod 3-3-1, and the other end is respectively connected with a brace 3-4 Hinged, the sleeve rod 3-3-1 is covered with a sliding sleeve 3-3-5, one end of the auxiliary strut 3-3-4 is hinged with a support plate 3-4, and the other end of the auxiliary strut 3-3-4 Hinged with the sliding sleeve 3-3-5, the hinge point connecting the auxiliary support rod 3-3-3 and the sleeve rod 3-3-1 is set at the lower part of the sleeve rod 3-3-1, and the support plate 3-4 is connected with the auxiliary support The hinge point connected by the rod 3-3-4 and the hinge point connected by the brace plate 3-4 and the auxiliary brace rod 3-3-3 are the same point, the hinge point is located in the middle of the brace plate 3-4, and the operating handle 3-6 Fixedly installed on the main shaft 3-5, the face plate 3-2 is set on the upper part of the main shaft 3-5, the face plate 3-2 and the main shaft 3-5 are fixedly connected with the cover plate and pins, and the hanger 3-1 is fixedly installed on the face plate 3-2 In the center of the upper surface, the lower end of the main shaft 3-5 is fixedly connected with the chassis 3-7.

When in use, first put the body positioner 3 in place at the center of the lower platen 4, then determine the position of the support 2 according to the assembly drawing of the body and level the installation plane.

Place the lower insulating pressure plate 7 and the lower iron yoke insulation 12 on the supporting member 2 in sequence.

Rotate the operating handle 3-6 at the bottom of the device body locator 3, so that the support plate 3-4 tightens the inner ring of the lower insulating pressure plate 7 and the lower iron yoke insulation 12, and adjusts the installation center position.

Turn the operating handle 3-6 by hand, so that the support plate 3-4 loosens the lower insulating pressing plate 7 and the lower iron yoke insulation 12, and then sets the low-voltage coil 13.

Hang the low-voltage coil 13 on the lower iron yoke insulation 12, align the center of the stay of the low-voltage coil 13 with the center of the pad of the lower iron yoke insulation 12, and turn the operating handle 3-6 by hand again to tighten the support plate 3-4 The inner circle of the low-voltage coil 13 adjusts the center position of the low-voltage coil 13 .

Shrinker body locator strut plate 3-4 outer diameter, assemble the main empty channel insulator 15 between high-voltage coil 14 and low-voltage coil 13 successively, assemble parts such as high-voltage coil 14.

Assemble the upper iron yoke insulation 11 and the upper insulating pressing plate 6.

3-4 pressure-sensitive elements 9 are placed between the upper end faces of the low-voltage coil 13 and the high-voltage coil 14 and the lower end pads of the upper iron yoke insulation 11 .

Lift off body locator 3.

Install the upper pressing plate 1, and press the assembled single-phase device body with the pull screw 5 and the fastening nut 8.

Hoist the assembled single-phase device body to the compactor for overall pressurization, and the pressure and pressure application time shall be carried out according to the design requirements.

After pressurization, check the pressure-sensitive color changes of the pressure-sensitive elements 9 of the three single-phase bodies and adjust the height of the high-voltage coil 14 or the low-voltage coil 13 to ensure that all coils are subject to the same pressing force.

After the overall pressing and finishing of the body is completed, the body is hoisted to the clean room for body assembly for complete machine assembly.

Claims (4)

1. An overall set of transformer body and a device for pressing, characterized in that it has an upper pressing plate (1), a support (2), a body positioner (3), a lower pressing plate (4) and a pull screw (5 ), the upper pressing plate (1) is arranged above the upper insulating pressing plate (6) of the transformer body, the support (2) is arranged under the lower insulating pressing plate (7) of the transformer body, and the lower pressing plate (4) is arranged on the support Below the piece (2), the upper platen (1) is provided with at least four upper platen mounting holes, and the lower platen (4) is provided with a lower platen mounting hole corresponding to the upper platen mounting holes, and the upper end of the screw rod (5) is Go through the installation hole of the upper pressure plate, the lower end of the pull screw (5) passes through the installation hole of the lower pressure plate, and the two ends of the pull screw (5) are equipped with fastening nuts (8); the center of the lower pressure plate (4) has a mounting hole for the body locator (4-1), the bottom of the body locator (3) cooperates with the body locator mounting hole (4-1). 2. The transformer body overall suit and pressing device according to claim 1, characterized in that: said body positioner (3) has a hanger (3-1), a face plate (3-2), Fixed support (3-3), support plate (3-4), main shaft (3-5), operating handle (3-6) and chassis (3-7) are formed, and chassis (3-7) and lower pressure plate (4 ) on the body locator mounting hole (4-1) to cooperate, the fixed bracket (3-3) has a sleeve rod (3-3-1), a set of main struts (3-3-2) and a set of auxiliary The strut (3-3-3), the sleeve rod (3-3-1) is set on the main shaft (3-5), and one end of the main strut (3-3-2) is hinged with the flower disc (3-2), The other end is respectively hinged with the upper part of a brace (3-4), one end of the auxiliary brace (3-3-3) is hinged with the outer ring of the sleeve rod (3-3-1), and the other end is respectively connected with a brace ( 3-4) Hinged, the hinge point connecting the auxiliary strut (3-3-3) and the sleeve rod (3-3-1) is arranged at the bottom of the sleeve rod (3-3-1), and the auxiliary strut (3-3-1) 3-3) The hinge point connected with the support plate (3-4) is located at the middle and lower part of the support plate (3-4), the operating handle (3-6) is fixedly installed on the main shaft (3-5), and the face plate (3- 2) Set on the upper part of the main shaft (3-5), the face plate (3-2) is fixedly connected with the main shaft (3-5) with a cover plate and pins, and the hanger (3-1) is fixedly installed on the face plate (3-2) In the center of the surface, the lower end of the main shaft (3-5) is fixedly or rotationally connected with the chassis (3-7). 3. The transformer body overall set and pressing device according to claim 2, characterized in that: said body positioner (3) also has at least one set of auxiliary struts (3-3-4), Sliding sleeve (3-3-5) is sleeved on cover bar (3-3-1), and one end of auxiliary stay bar (3-3-4) is hinged with a support plate (3-4), and auxiliary stay bar (3-3 -3-4) the other end is all hinged with sliding sleeve (3-3-5). 4. According to claim 1, 2 or 3, the transformer body overall suit and pressing device is characterized in that: the upper end faces of the low-voltage coil (13) and the high-voltage coil (14) of the transformer body and the upper iron A pressure sensitive element (9) is arranged between the lower surfaces of the yoke insulation (11).

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