Electric reactor coil oil belt pressing auxiliary tool

Abstract

The utility model belongs to the field of electric reactor production, and relates to an electric reactor coil oil belt pressing auxiliary tool which comprises a pressing beam, a supporting cushion block, a screw rod and a supporting plate, the pressing beam comprises a pair of long-strip-shaped iron plates arranged in parallel, and the two ends of the long-strip-shaped iron plates are fixedly connected into a whole through connecting plates and screws. One end of the supporting plate is provided with a through hole, the lower end of the screw penetrates through the through hole of the supporting plate, the screw above and below the supporting plate is provided with a lower nut in a screwed mode, the other end of the supporting plate extends into the lower edge of the pressing plate, and supporting cushion blocks are arranged below the two ends of the pressing beam. The upper surface of the supporting cushion block abuts against the upper edge of the upper iron yoke, and the lower surface of the supporting cushion block abuts against the oil belt groove in the pressing plate. In the process that a coil is pressed by an oil belt, the upper surface of the pressing plate is limited through the supporting cushion block, the lower surface of the pressing plate is limited through the supporting plate, excessive deformation of the pressing plate in the pressing process is avoided, and noise of a product can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of reactor manufacturing technology and relates to an auxiliary tooling for pressurizing reactor coil oil. Background Technology

[0002] The coil of a 1000kV reactor is usually clamped by a hydraulic cylinder. However, the hydraulic cylinder can only be placed at a few points and cannot clamp the reactor coil evenly. This clamping method results in uneven clamping of the 1000kV reactor coil, and the levelness of the pressure plate cannot meet the technical requirements of a low-noise 1000kV reactor.

[0003] Alternatively, a pressure plate combined with an oil strip can be used to compress the 1000kV reactor coil. An oil strip groove is cut into the pressure plate, and the oil strip is threaded through the groove and filled with transformer oil. By controlling the pressure of the transformer oil in the oil strip, the reactor coil is compressed. However, during the coil compression process, as the pressure increases, the edges of the pressure plate will deform to some extent, affecting the coil compression effect. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides an auxiliary tooling for tamping 1000kV reactor coil oil line. The technical solution adopted by this utility model is as follows:

[0005] The auxiliary tooling for pressurizing the oil strip of the reactor coil includes a pressure beam, support pads, screws, and a support plate. The pressure beam consists of a pair of parallel long strip iron plates. The two ends of the pair of long strip iron plates are fixedly connected as one piece by a connecting plate and screws. The upper end of the screw passes through the gap between the two ends of the pair of iron plates and is screwed with an upper nut. One end of the support plate has a through hole, and the lower end of the screw passes through the through hole of the support plate. Lower nuts are screwed onto the screws above and below the support plate. The other end of the support plate extends into the lower edge of the pressure plate. Support pads are arranged below both ends of the pressure beam. The upper surface of the support pads abuts against the upper edge of the upper yoke, and the lower surface of the support pads abuts against the oil strip in the oil strip groove on the pressure plate.

[0006] Preferably, the support pad is an L-shaped irregular structure, and the upper horizontal plane of the support pad is parallel to the lower horizontal plane.

[0007] Preferably, the through hole in the support plate is a waist hole.

[0008] Preferably, the end of the support plate extends at least 50 mm into the lower edge of the pressure plate.

[0009] Preferably, the upper and lower parts of the screw cylinder are provided with threaded wires, and a lifting hole is opened in the middle of the screw.

[0010] The beneficial effects of this utility model are:

[0011] The auxiliary tooling provided by this utility model limits the upper surface of the pressure plate by a support pad and the lower surface of the pressure plate by a support plate during the process of pressing the reactor coil with an oil hose. This ensures the coil pressing effect while preventing excessive deformation of the pressure plate during the pressing process. This auxiliary tooling is being used for the first time on 1000kV low-noise reactor products. It can effectively reduce the deformation of the pressure plate, reduce the noise of 1000kV reactor products, and improve product quality. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a front view of the tooling after installation according to an embodiment of the present utility model;

[0014] Figure 2 This is a left view of the tooling after installation according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the pressure beam according to an embodiment of the present utility model. 3a is the front view, 3b is the top view, and 3c is the left view.

[0016] Figure 4 This is a schematic diagram of the structure of the support pad block according to an embodiment of the present utility model;

[0017] Figure 5 This is a schematic diagram of the screw structure according to an embodiment of the present utility model;

[0018] Figure 6 This is a schematic diagram of the support plate in an embodiment of the present utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the pressure plate in an embodiment of the present utility model;

[0020] Figure 8 This is a schematic diagram of the oil belt pressure versus height variation equation curve according to an embodiment of the present invention;

[0021] In the diagram, 1 is the pressure beam, 2 is the support pad, 3 is the screw, 4 is the support plate, 5 is the upper yoke, 6 is the pressure plate, 7 is the screw hole, 8 is the connecting plate, 9 is the waist hole, and 10 is the oil groove. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] like Figure 1, 2 As shown, the auxiliary tooling for pressurizing the oil strip of the reactor coil includes a pressure beam 1, support pads 2, screws 3, and a support plate 4. The upper end of the screw 3 passes through both ends of the pressure beam 1, and an M52 upper nut is screwed onto it to fix the upper end of the screw 3 to the pressure beam 1. One end of the support plate 4 has a through hole, and the lower end of the screw 3 passes through the through hole of the support plate 4. M52 lower nuts are screwed onto the screws 3 above and below the support plate 4. A pair of lower nuts fix the support plate 4 to the lower end of the screws 3. The other end of the support plate 4 extends at least 50mm into the lower edge of the pressure plate 6 to ensure that the support plate 4 can support the pressure plate 6 during the pressurization process. A certain gap is reserved between the upper surface of the support plate 4 and the lower surface of the pressure plate 6 according to the pressurization range. Support pads 2 are arranged below both ends of the pressure beam 1. The support pads 2 are located outside the upper yoke 5, with the upper surface of the support pad 2 abutting against the upper yoke 5 and the lower surface of the support pad 2 abutting against the oil strip on the pressure plate 6.

[0024] like Figure 3 As shown, the pressure beam 1 includes a pair of parallel elongated iron plates. The two ends of the pair of elongated iron plates are fixedly connected as a whole by connecting plates 8 and screws to form the pressure beam 1. The pressure beam 1 is designed as a combination structure of two iron plates, and the upper end of the screw 3 passes through the gap between the pair of iron plates, which greatly facilitates the assembly and disassembly of the screw 3.

[0025] like Figure 4 As shown, the support pad 2 has an L-shaped irregular structure, and the upper and lower horizontal surfaces of the support pad 2 are parallel. During the pressing process, the lower part of the support pad 2 presses down on the oil strip in the oil strip groove 10 to prevent the pressure plate 6 from tilting upwards.

[0026] like Figure 5 As shown, the screw 3 is a steel cylinder with threads arranged on the upper and lower parts, and a lifting hole in the middle for easy lifting. The screw 3 passes through the pressure beam 1, and is fixed at the upper and lower parts by nuts. The upper part of the screw 3 is connected to the pressure beam 1, and the lower part of the screw 3 is connected to the support plate 4.

[0027] like Figure 6 As shown, the through hole on the support plate 4 is a waist hole 9, which allows for easy adjustment of the distance between the support plate 4 and the pressure plate 6. During the pressing process, the support plate 4 supports the pressure plate 6, preventing the pressure plate 6 from bending downwards.

[0028] like Figure 7 As shown, the upper surface of the pressure plate 6 is provided with several oil strip grooves 10, in which oil strips are placed, transformer oil is injected, and pressure is applied to compress the reactor coil.

[0029] The auxiliary tooling for pressurizing reactor coil oil belt provided in this embodiment of the invention includes the following steps in its usage:

[0030] 1. Place the two pressure beams 1 on both sides above the upper yoke 5.

[0031] 2. A screw rod 3 is passed vertically through the gap between the two ends of the pair of iron plates of the pressure beam 1. An upper nut is screwed onto the upper end of the screw rod 3 to fix the upper end of the screw rod 3 onto the pressure beam 1.

[0032] 3. Pass the lower end of the screw 3 through the through hole of the support plate 4. Screw the lower nuts onto the screws 3 above and below the support plate 4. The pair of lower nuts fix the support plate 4 to the lower end of the screw 3.

[0033] 4. Adjust the angle and position of the support plate 4 to ensure that the end of the support plate 4 extends into the lower edge of the pressure plate 6 by at least 50mm. The support plate 4 supports the pressure plate 6 to prevent it from deforming during the coil compression process.

[0034] 5. Place support pads 2 below both ends of the pressure beam 1. The support pads 2 are located outside the upper yoke 5. The upper surface of the support pads 2 abuts against the upper edge of the upper yoke 5, and the lower surface of the support pads 2 abuts against the oil groove 10 on the pressure plate 6.

[0035] 6. Insert the oil belt into the oil belt groove 10, install a locking handle at one end of the oil belt, and connect the other end of the oil belt to the "oil belt compressing equipment". Start the vacuum system of the "oil belt compressing equipment" (the oil belt compressing equipment is an existing product) to vacuum the oil belt until the oil belt is flat and free of gas.

[0036] 7. Connect the oil injection and pressurization system of the "oil belt pressure tackling equipment" to the other end of the oil belt through a pipe joint and a switch valve. Start the oil injection and pressurization system of the "oil belt pressure tackling equipment" and pressurize it to 0.3MPa. Check that the oil belt is normal and the pressure plate 6 is not obviously deformed.

[0037] 8. Pressurize to the rated pressure, maintain the pressure for 5 minutes, and measure the height of the coil and oil belt.

[0038] 9. Based on the oil belt height, obtain the next pressurization pressure value by referring to the oil belt pressure versus height change equation curve. The oil belt pressure versus height change equation curve is as follows: Figure 8 As shown, Figure 8 The vertical axis represents k = actual pressure / design pressure, and the horizontal axis represents the oil belt height.

[0039] 10. Repeat the above steps until the rated pressure and coil height requirements of the design are met.

[0040] 11. Start the oil return system of the "oil belt compression device" to recover the transformer oil in the oil belt; remove the locking handle at the end of the oil belt and take the oil belt out of the pressure plate groove 10.

[0041] Preferably, fire hoses can be used to make oil hoses. The steps for making oil hoses are as follows:

[0042] Select a section of fire hose and trim the end of the fire hose with scissors to ensure that the cut at the end of the fire hose is straight.

[0043] A sleeve and a tapered pin are selected to match the fire hose. The tapered pin has a through-tube structure at its center along its length. One end of the sleeve is closed and has a through hole for the small end of the tapered pin to pass through. The diameter of the through hole is smaller than the diameter of the large end of the tapered pin. The small end of the tapered pin has external threads. By tightening a fastening nut on the external threads, the tapered pin and the sleeve can be fixedly connected as one unit. The inner diameter of the sleeve matches the outer diameter of the large end of the tapered pin, and the inner diameter of the sleeve is slightly larger than the outer diameter of the large end of the tapered pin. The gap between the sleeve and the large end of the tapered pin needs to be able to allow for an interference fit to accommodate the fire hose. The inner diameter of the fire hose matches the outer diameter of the large end of the tapered pin, and the outer diameter of the large end of the tapered pin is slightly smaller than the inner diameter of the fire hose. The head end of the fire hose can be interference fit onto the large end of the tapered pin.

[0044] Mark the outer surface of the fire hose with a marker at the same depth as the sleeve at the cut end of the fire hose. Hold the tapered pin and secure the sleeve in a bench vise. Loosen the nut on the small end of the tapered pin and pull the tapered pin out of the sleeve. Insert the large end of the tapered pin into the fire hose end, and then insert the small end of the tapered pin into the sleeve.

[0045] Based on the markings on the outer surface of the fire hose, check if the sheared end of the fire hose reaches the bottom of the sleeve. Once the sheared end of the fire hose reaches the bottom of the sleeve, tighten the fastening nut on the small end of the tapered pin. First, install the sleeve in a bench vise to ensure sufficient tightening force for the fastening nut. During the tightening process, check the fire hose between the tapered pin and the sleeve to ensure that no wrinkles have formed in the fire hose. After tightening the fastening nut, connect the small end of the tapered pin to one end of the switch valve via a pipe fitting for a sealing connection. Connect the other end of the switch valve to the oil pressurization system of the "oil hose pressure retardation equipment" via a pipe fitting for a sealing connection. The matching sleeve and tapered pin ensure a reliable, sealed connection between the fire hose end and the switch valve, preventing oil leakage at the fire hose end.

[0046] In this embodiment of the utility model, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0047] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. A reactor coil oil pressure tack auxiliary tooling, characterized in that, The device includes a pressure beam (1), a support pad (2), a screw (3), and a support plate (4). The pressure beam (1) includes a pair of parallel long strip iron plates. The two ends of the pair of long strip iron plates are fixedly connected as one unit by a connecting plate (8) and screws. The upper end of the screw (3) passes through the gap between the two ends of the pair of iron plates and is screwed with an upper nut. One end of the support plate (4) has an open hole. The lower end of the screw (3) passes through the open hole of the support plate (4). The lower nuts are screwed on the screws (3) above and below the support plate (4). The other end of the support plate (4) extends into the lower edge of the pressure plate (6). Support pads (2) are arranged below both ends of the pressure beam (1). The upper surface of the support pad (2) abuts against the upper edge of the upper iron yoke (5), and the lower surface of the support pad (2) abuts against the oil strip in the oil strip groove (10) on the pressure plate (6).

2. The reactor coil oil belt pressure relief auxiliary tooling according to claim 1, characterized in that, The support pad (2) is an L-shaped irregular structure, and the upper horizontal surface of the support pad (2) is set parallel to the lower horizontal surface.

3. The reactor coil oil belt pressure relief auxiliary tooling according to claim 1, characterized in that, The through hole opened on the support plate (4) is a waist hole (9).

4. The reactor coil oil belt pressure relief auxiliary tooling according to claim 1, characterized in that, The end of the support plate (4) extends into the lower edge of the pressure plate (6) by at least 50 mm.

5. The reactor coil oil belt pressure tack auxiliary tooling according to claim 1, characterized in that, The upper and lower parts of the cylinder of the screw (3) are provided with threaded wires, and the middle part of the screw (3) has a lifting hole.

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