Method for locating the coil output of a converter transformer

Abstract

This invention belongs to the field of transformer coils and relates to a method for positioning the coil exit point of a converter transformer during coil assembly. First, a pressure plate, tooling pad, and lower pad of the coil assembly are assembled. A vertical line is drawn on the outer periphery of the lower pad to mark the coil exit point positioning line. A fixing plate is installed along the edge of the lower pad. A crosshair laser level and a tooling level are mounted on the fixing plate. The center position of the coil exit point is marked with dots on its surface. The laser line emitted by the crosshair laser level passes through the coil exit point positioning line and projects onto the surface of the internal insulation of the coil. During coil assembly, the coil position is adjusted during the coil's descent to ensure that the laser line passes through the center position of the coil exit point. This invention spatializes the coil exit point positioning line, avoiding assembly errors caused by manual positioning. It is simple to operate, highly accurate, and can effectively improve the efficiency of coil exit point positioning.

Description

Technical Field

[0001] This invention belongs to the field of transformer coil technology, and specifically relates to a method for positioning the lead-out end of a converter transformer coil during the coil assembly process. Background Technology

[0002] The shielding of the lead wires at the output of a converter transformer coil typically employs a structure consisting of a molded lead wire and a shielding tube. To ensure the shielding effect, the fit gap between the shielding tube and the molded lead wire is usually designed to be very small. Since the lead wire of the converter transformer coil is located at the center of the molded lead wire, if the position of the lead wire deviates from the designed position during coil assembly, it will cause difficulties in assembling the shielding tube, thereby affecting the shielding effect of the converter transformer coil lead wire.

[0003] Therefore, accurate positioning of the coil leads during the coil assembly process is crucial for converter transformers. Currently, the commonly used method for positioning converter transformer coil leads is using a plumb line and a spirit level. However, this method is highly dependent on the operator's skill and may introduce significant errors. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for locating the coil lead of a converter transformer. The technical solution adopted by this invention is as follows:

[0005] The method for locating the lead-out end of a converter transformer includes the following steps:

[0006] Step 1: Place the disc-shaped pressure plate on the ground. Place several rectangular tooling blocks around the outer edge of the upper surface of the pressure plate to form a circular structure. Place the lower pad of the disc-shaped coil assembly on the upper end of the tooling blocks. The horizontal deviation between the pressure plate and the lower pad of the coil assembly should be ≤2mm. Draw a vertical line on the outer side of the lower pad of the coil assembly to mark the coil exit positioning line. Assemble the internal insulation components of the converter transformer coil.

[0007] Step 2: Install the trapezoidal fixing plate on the edge of the lower pad of the coil assembly. The upper surface of the fixing plate has a cross-shaped through slot and groove. The groove is parallel to and close to the long straight edge of the fixing plate. Install the cross laser level at the intersection of the through slot and groove. The cross laser level emits a cross-shaped three-dimensional laser line. Fix the tooling level on the upper surface of the fixing plate. Leave a gap between the cross laser level and the edge of the lower pad of the coil assembly. Use the tooling level to confirm the levelness of the lower pad of the coil assembly and ensure that the lower pad of the coil assembly is level. Adjust the horizontal position of the cross laser level so that the first laser line emitted by the cross laser level passes through the coil outlet positioning line along the through slot and is projected onto the surface of the internal insulation of the coil. At the same time, the second laser line is parallel to the long straight edge of the fixing plate.

[0008] Step 3: Mark the center position of the coil outlet with a pen on the surface of the coil outlet. When installing the coil, adjust the position of the coil during the falling process to ensure that the laser line passes through the center position of the coil outlet.

[0009] Preferably, two fixing screws are symmetrically fixed on the lower surface of the fixing plate. The fixing plate is placed on the upper edge of the lower pad of the coil assembly, so that the fixing screws are close to the outer edge of the lower pad of the coil assembly. A fastening nut is screwed into the lower end of the fixing screw, so that the upper surface of the fastening nut is in contact with the lower edge of the lower pad of the coil assembly.

[0010] Preferably, a pair of countersunk holes are made on the lower surface of the fixing plate, and threads are tapped in the countersunk holes. The upper end of the fixing screw is screwed into the countersunk holes tapped on the inner circumference.

[0011] Preferably, a clip structure is provided on the fixing plate, and a buckle structure that cooperates with the clip structure is provided on the cross laser level. The cross laser level is installed at the intersection of the through slot and the recess through the buckle structure.

[0012] Preferably, a groove is made on the upper surface of the fixing plate at the position where the cross laser level is installed, and the cross laser level is installed in the groove.

[0013] Preferably, a second groove is dug on the upper surface of the fixing plate at the position where the tooling level is installed, and a ridge groove is set inside the second groove. The ridge groove on the fixing plate and the ridge mounting groove of the tooling level are interlocked.

[0014] The beneficial effects of this invention are:

[0015] This invention utilizes specialized tooling, including a fixing plate and a crosshair laser level, to spatialize the coil lead positioning line, avoiding assembly errors caused by manual positioning. This invention is simple to operate, uses easily manufactured tooling, and offers high precision, effectively improving the efficiency of coil lead positioning and possessing broad application prospects. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a front view of the assembly of various tools during coil lead positioning according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Top view in the AA direction;

[0019] Figure 3 for Figure 1A schematic diagram of the connection structure of the BB direction fixing plate;

[0020] Figure 4 This is a schematic diagram illustrating the working principle of the cross laser level according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the laser line space visualization according to an embodiment of the present invention;

[0022] Among them, 1 is the tooling level, 2 is the cross laser level, 3 is the fixing screw, 4 is the fixing plate, 5 is the fastening nut, 6 is the lower pad of the coil group, 7 is the pressure plate, 8 is the tooling pad, 9 is the coil protrusion, 10 is the coil protrusion positioning line, 11 is the through slot, 12 is the groove, and 13 is the inner coil. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] like Figure 1-5 As shown, the specific implementation steps of the converter transformer coil lead positioning method are as follows:

[0025] Step 1: Preparations before assembling the coil.

[0026] 1.1 Assemble the pressure plate 7, tooling pad 8, and lower pad 6 of the coil assembly, ensuring that the horizontal deviation between the pressure plate 7 and the lower pad 6 of the coil assembly is ≤2mm. The specific method is as follows:

[0027] Place the pressure plate 7 on the ground. The pressure plate 7 has a disc structure. Place several tooling pads 8 directly on the outer periphery of the upper surface of the pressure plate 7. The tooling pads 8 have a cuboid shape. Several tooling pads 8 form a circular structure. Place the lower pad 6 of the coil group on the upper end of the tooling pads 8. The lower pad 6 of the coil group has a disc structure.

[0028] 1.2 Draw a vertical line on the outer side of the lower pad 6 of the coil assembly to mark the coil lead positioning line 10.

[0029] 1.3. Assemble internal insulation components in the converter transformer coil.

[0030] Step 2: Positioning and tooling assembly.

[0031] 2.1 Two fixing screws 3 are symmetrically fixed to the lower surface of the fixing plate 4. The fixing plate 4 is placed on the edge of the upper surface of the lower pad 6 of the coil assembly. The fixing screws 3 are pressed tightly against the outer edge of the lower pad 6 of the coil assembly. The fixing nut 5 is screwed into and tightened at the lower end of the fixing screw 3, with the upper surface of the tightening nut 5 fitting against the edge of the lower surface of the lower pad 6 of the coil assembly. The fixing plate 4 is fixedly installed on the edge of the lower pad 6 of the coil assembly by the fixing screws 3 and the tightening nut 5 on the lower surface of the fixing plate 4.

[0032] The fixing plate 4 has a trapezoidal structure. The upper surface of the fixing plate 4 has a cross-shaped through slot 11 and a recessed groove 12. The coil lead positioning line 10 can be seen through the through slot 11. The recessed groove 12 is parallel to and close to the long straight edge of the fixing plate 4. A pair of countersunk holes are symmetrically formed on the lower surface of the fixing plate 4, corresponding to the positions on both sides of the through slot 11. The upper end of the fixing screw 3 is fixedly installed in the countersunk holes. Specifically, the screw 3 is directly screwed into the countersunk hole with threads on its inner circumference by tapping threads into the countersunk hole.

[0033] 2.2 The cross laser level 2 is fixedly installed at the intersection of the through slot 11 and the groove 12 using a snap-fit ​​connector. The tooling level 1 is fixedly installed on the upper surface of the fixing plate 4. The cross laser level 2 is a certain distance from the edge of the lower pad 6 of the coil group. The tooling level 1 is located above the lower pad 6 of the coil group.

[0034] The clip structure is set on the fixed plate 4, and the buckle structure is set on the cross laser level 2. The clip structure and the buckle structure are connected together in cooperation.

[0035] A groove is made on the upper surface of the fixing plate 4 at the position where the cross laser level 2 is installed. The cross laser level 2 is installed in the groove, which makes the cross laser level 2 more stable. The upper surface of the cross laser level 2 is slightly higher than the upper surface of the fixing plate 4.

[0036] The position on the upper surface of the fixing plate 4 where the tooling level 1 is installed needs to be grooved into a second groove. Each end of the bubble tube assembly of the tooling level 1 is provided with a ridge mounting groove. The inner side of the groove of the fixing plate 4 is provided with a ridge groove. The ridge groove on the fixing plate 4 and the ridge mounting groove of the tooling level 1 cooperate with each other to achieve a fastening. The second groove and the ridge groove make the tooling level 1 more stable.

[0037] The tooling level 1 is a conventional bubble level, while the cross laser level 2 is a device that emits a three-dimensional laser line for human eye observation.

[0038] 2.3. Use tooling level 1 to confirm the levelness of the lower pad 6 of the coil assembly, and ensure that the lower pad 6 of the coil assembly is in a horizontal state.

[0039] 2.4 Adjust the horizontal position of the cross laser level 2 so that one of the laser lines emitted by the cross laser level 2 passes through the through slot 11 on the fixing plate 4 and through the coil exit positioning line 10 on the outer side of the lower pad 6 of the coil assembly. Because the light is blocked by the internal insulation of the coil, the laser line is projected onto the surface of the internal insulation of the coil, that is, the laser line with a certain vertical height is visualized in space.

[0040] The laser lines emitted by the cross laser level 2 not only intersect horizontally, but also have a certain vertical height, forming a three-dimensional cross structure. If laser line 2, passing through the groove 12, remains parallel to the long straight edge of the fixed plate, it indicates that laser line 1 passes through the coil exit positioning line 10 in the correct direction.

[0041] Step 3, inner coil 13 set.

[0042] 3.1 Mark the center position of coil outlet 9 on the surface of coil outlet 9 with a pen.

[0043] 3.2. Set the inner coil 13. During the descent of the inner coil 13, adjust its position to ensure that the laser line passes through the center of the coil outlet 9.

[0044] Step 4: Other coil sets.

[0045] Repeat steps 2 and 3 until the entire converter transformer coil assembly is complete. A converter transformer coil assembly typically contains multiple coils, each of which needs to be assembled individually in sequence.

[0046] This invention utilizes laser-guided "cross" positioning to introduce planar positioning lines into three-dimensional space, simplifying operation and effectively ensuring the accuracy of coil protrusion 9 positioning during coil assembly. The fixture uses cylindrical fixing screws 3 to mount the fixing plate 4. The fixture can be assembled onto the lower pad 6 of any coil assembly size, unaffected by the external dimensions of the lower pad 6. The laser level 2 of the fixture is connected to the fixing plate 4 via a snap-fit ​​connection, and the fixing screw 3 is connected via threads and a fastening nut 5, enabling the fixture to be detached for convenient storage and transport.

[0047] In the embodiments of the present invention, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0048] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention 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 within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; 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 the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A method for locating the coil lead of a converter transformer, characterized in that, Includes the following steps: Step 1: Place the disc-shaped pressure plate on the ground. Place several rectangular tooling blocks around the outer edge of the upper surface of the pressure plate to form a circular structure. Place the lower pad of the disc-shaped coil assembly on the upper end of the tooling blocks. The horizontal deviation between the pressure plate and the lower pad of the coil assembly should be ≤2mm. Draw a vertical line on the outer side of the lower pad of the coil assembly to mark the coil exit positioning line. Assemble the internal insulation components of the converter transformer coil. Step 2: Install the trapezoidal fixing plate on the edge of the lower pad of the coil assembly. The upper surface of the fixing plate has a cross-shaped through slot and groove. The groove is parallel to and close to the long straight edge of the fixing plate. Install the cross laser level at the intersection of the through slot and groove. The cross laser level emits a cross-shaped three-dimensional laser line. Fix the tooling level on the upper surface of the fixing plate. Leave a gap between the cross laser level and the edge of the lower pad of the coil assembly. Use the tooling level to confirm the levelness of the lower pad of the coil assembly and ensure that the lower pad of the coil assembly is level. Adjust the horizontal position of the cross laser level so that the first laser line emitted by the cross laser level passes through the coil outlet positioning line along the through slot and is projected onto the surface of the internal insulation of the coil. At the same time, the second laser line is parallel to the long straight edge of the fixing plate. Step 3: Mark the center position of the coil outlet with a pen on the surface of the coil outlet. When installing the coil, adjust the position of the coil during the falling process to ensure that the laser line passes through the center position of the coil outlet.

2. The converter transformer coil lead positioning method according to claim 1, characterized in that, Two fixing screws are symmetrically fixed on the lower surface of the fixing plate. The fixing plate is placed on the upper edge of the lower pad of the coil assembly, so that the fixing screws are close to the outer edge of the lower pad of the coil assembly. A fastening nut is screwed into the lower end of the fixing screw, so that the upper surface of the fastening nut is in contact with the lower edge of the lower pad of the coil assembly.

3. The converter transformer coil lead positioning method according to claim 2, characterized in that, Make a pair of countersunk holes on the lower surface of the fixing plate, tap the countersunk holes, and screw the upper end of the fixing screw into the countersunk holes tapped on the inner circumference.

4. The converter transformer coil lead positioning method according to claim 1, characterized in that, A clip structure is set on the fixed plate, and a buckle structure that cooperates with the clip structure is set on the cross laser level. The cross laser level is installed at the intersection of the through slot and the groove through the buckle structure.

5. The converter transformer coil lead positioning method according to claim 4, characterized in that, A groove is cut into the upper surface of the fixing plate at the position where the cross laser level is installed, and the cross laser level is installed in the groove.

6. The converter transformer coil lead positioning method according to claim 1, characterized in that, A second groove is dug on the upper surface of the fixed plate at the position where the tooling level is installed. A ridge groove is set inside the second groove, and the ridge groove on the fixed plate and the ridge mounting groove of the tooling level are interlocked.

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