A method for measuring and positioning transformer leads

Abstract

The present invention relates to a transformer lead measurement and positioning method, belonging to the technical field of transformer manufacturing process. The technical solution is: prepare a retractable T-shaped ruler, clamp a current-carrying lead (5) with a wire clamp (4), fix the horizontal ruler (31) of the T-shaped ruler at the position of the clamp (1), adjust the T-shaped ruler (3) to be retracted, and closely contact the inner side of the current-carrying lead (3) with the vertical ruler (32) of the T-shaped ruler (3), and measure the horizontal distance A between the clamp (1) and the terminal (2); then, using the T-shaped ruler (3) as a reference, use a box ruler (6) to directly measure the longitudinal distance B between the clamp and the terminal, thereby locating the actual spatial position of the direct-out lead terminal, and then directly configuring the direct-out lead and crimping the terminal. The beneficial effect of the present invention is that it avoids the tedious work of lifting the transformer body into and out of the oil tank, and assembling and disassembling the lifting seat and the bushing, greatly saving energy, reducing labor intensity, and improving production efficiency.

Description

Technical Field

[0001] The invention relates to a transformer lead measurement and positioning method, belonging to the technical field of transformer manufacturing technology. Background Art

[0002] When welding some transformer leads, it's often necessary to measure and position both direct-out and detachable lead terminals. For direct-out lead terminals, to ensure the precise connection dimensions between the high, medium, and low voltage leads and their bushings, appropriate dimensions are typically reserved for each lead. The transformer body is then hoisted into the oil tank. After the bushings are installed, the actual positions of the bushing terminals are measured before welding the lead connections. Traditional assembly methods for detachable lead terminals require adjusting the length of the current-carrying leads after the bushings are installed. Both of these lead terminal assembly methods present several issues: To ensure the precise connection dimensions of the leads, the transformer body must first be hoisted into the oil tank before installing the various risers and their bushings. After the leads are assembled, all of the risers must be removed and the transformer body hoisted out of the tank. This method, however, is time-consuming, inefficient, and labor-intensive. Summary of the Invention

[0003] The purpose of the present invention is to provide a transformer lead measurement and positioning method, which avoids the tedious work of lifting the transformer body into and out of the oil tank, and installing and removing the rising seat and bushing, greatly saves energy, reduces labor intensity, and solves the problems existing in the background technology.

[0004] The technical solution of the present invention is:

[0005] A transformer lead measurement and positioning method includes measurement and positioning methods for two structures: a straight-out lead terminal and a detachable lead terminal. The straight-out lead terminal is a lead terminal without a shielding tube, and the detachable lead terminal is a lead terminal with a shielding tube.

[0006] A method for measuring and locating a transformer direct-outlet lead terminal comprises the following steps: preparing a retractable T-ruler, clamping a current-carrying lead with a wire clamp, fixing the horizontal ruler of the T-ruler at the clamping position, adjusting the extension of the T-ruler so that the vertical ruler of the T-ruler is in close contact with the inner side of the current-carrying lead, and measuring the horizontal distance A between the clamp and the terminal; then, using the T-ruler as a reference, directly measuring the longitudinal distance B between the clamp and the terminal with a box ruler, thereby locating the actual spatial position of the direct-outlet lead terminal, and then directly arranging the direct-outlet lead and crimping the terminal.

[0007] A method for measuring and locating detachable lead terminals of a transformer comprises the following steps: arranging a second current-carrying lead and a third current-carrying lead side by side in a shielding tube, wherein one end of the second current-carrying lead and the third current-carrying lead extend out of one end of the shielding tube and are provided with a first bushing terminal and a second bushing terminal, respectively, and the other end extend out of the other end of the shielding tube and are provided with a first switch terminal and a second switch terminal, respectively; a distance C between a connection point between the second current-carrying lead and the bushing terminal and one end of the shielding tube, a longitudinal distance D between the second current-carrying lead and the shielding tube, a radius R of a transition arc center of the second current-carrying lead in the shielding tube, a transverse distance E between the second current-carrying lead and the shielding tube, a distance F between a connection point between the second current-carrying lead and the switch terminal and the other end of the shielding tube, and a distance d between wiring holes between the first switch terminal and the second switch terminal; and calculating the lengths of the second current-carrying lead and the third current-carrying lead using the following formula:

[0008] The length of the second current-carrying lead = C + D + (3.14R / 2) + E + F

[0009] The length of current-carrying lead 3 = the length of current-carrying lead 2 + d

[0010] After the lengths of the current-carrying leads 2 and 3 are confirmed, the detachable leads can be directly configured, and then the bushing terminal 1 and bushing terminal 2 on the bushing side and the switch terminal 1 and switch terminal 2 on the switch side are crimped.

[0011] The beneficial effects of the present invention are: avoiding the tedious work of lifting the transformer body into and out of the oil tank, and assembling and disassembling the lifting seat and the bushing, greatly saving energy, reducing labor intensity, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram showing the positioning of the direct-outlet lead of the present invention;

[0013] Figure 2 This is a schematic diagram of the T-shaped ruler structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the direct-outlet lead measurement of the present invention;

[0015] Figure 4 This is a schematic diagram of the direct-outlet lead structure of the present invention;

[0016] Figure 5 This is a schematic diagram of the detachable lead structure of the present invention;

[0017] In the figure: clamp 1, terminal 2, T-ruler 3, horizontal ruler 31, vertical ruler 32, wire clamp 4, current-carrying lead 1 5, box ruler 6, current-carrying lead 2 7, current-carrying lead 3 8, bushing terminal 1 9, bushing terminal 2 10, switch terminal 1 11, switch terminal 2 12, shielding tube 13. DETAILED DESCRIPTION

[0018] The present invention will be further described below through embodiments with reference to the accompanying drawings.

[0019] A transformer lead measurement and positioning method includes measurement and positioning methods for two structures: a straight-out lead terminal and a detachable lead terminal. The straight-out lead terminal is a lead terminal without a shielding tube, and the detachable lead terminal is a lead terminal with a shielding tube.

[0020] A method for measuring and locating a transformer direct-outlet lead terminal comprises the following steps: preparing a retractable T-ruler, clamping a current-carrying lead 5 with a wire clamp 4, fixing the horizontal ruler 31 of the T-ruler at the position of a clamp 1, adjusting the extension of the T-ruler 3 so that the vertical ruler 32 of the T-ruler 3 is in close contact with the inner side of the current-carrying lead 1, and measuring the horizontal distance A between the clamp 1 and the terminal 2; then, using the T-ruler 3 as a reference, using a box ruler 6 to directly measure the longitudinal distance B between the clamp and the terminal, thereby locating the actual spatial position of the direct-outlet lead terminal, and then directly arranging the direct-outlet lead and crimping the terminal.

[0021] A method for measuring and locating detachable lead terminals of a transformer comprises the following steps: arranging a current-carrying lead 2 7 and a current-carrying lead 3 8 side by side in a shielding tube 13, wherein one end of the current-carrying lead 2 and the current-carrying lead 3 extend out of one end of the shielding tube and are respectively provided with a sleeve terminal 1 9 and a sleeve terminal 2 10, and the other end extend out of the other end of the shielding tube and are respectively provided with a switch terminal 1 11 and a switch terminal 2 12; the distance between the connection point of the current-carrying lead 2 and the sleeve terminal and one end of the shielding tube is C, the longitudinal distance of the current-carrying lead 2 in the shielding tube is D, the center radius of the transition arc of the current-carrying lead 2 in the shielding tube is R, the transverse distance of the current-carrying lead 2 in the shielding tube is E, the distance between the connection point of the current-carrying lead 2 and the switch terminal and the other end of the shielding tube is F, and the distance between the wiring holes of the switch terminal 1 and the switch terminal 2 is d; and the lengths of the current-carrying lead 2 and the current-carrying lead 3 are calculated using the following formula:

[0022] The length of the second current-carrying lead = C + D + (3.14R / 2) + E + F

[0023] The length of current-carrying lead 3 = the length of current-carrying lead 2 + d

[0024] After the lengths of the current-carrying leads 2 and 3 are confirmed, the detachable leads can be directly configured, and then the bushing terminal 1 and bushing terminal 2 on the bushing side and the switch terminal 1 and switch terminal 2 on the switch side are crimped.

[0025] In this embodiment, refer to the attached Figure 1-4A method for measuring and locating transformer direct-out lead terminals. Once dimensions A and B are determined, the direct-out terminal can be positioned. To locate the actual terminal position, a special measuring tool—a T-ruler—is required. During measurement, the T-ruler is fixed to the clamp position, adjusted to extend and retract, and the horizontal distance A between the clamp and the terminal is measured. Using the T-ruler as a reference, a box ruler is used to directly measure the vertical distance B between the clamp and the terminal, thereby locating the actual spatial position of the direct-out lead terminal. This replaces the actual spatial position after the bushing is installed, eliminating the need for bushing installation. According to practical experience, keeping the measured values ​​of dimensions A and B within 10mm of the drawing values ​​ensures smooth subsequent installation. After the positioning dimensions are confirmed, the direct-out leads can be directly configured and the terminal crimped.

[0026] Refer to the attached Figure 5 A method for measuring and locating detachable lead terminals of a transformer is provided. The lengths of the second and third current-carrying leads are calculated using the following formula:

[0027] The length of the second current-carrying lead = C + D + (3.14R / 2) + E + F

[0028] The length of current-carrying lead 3 = the length of current-carrying lead 2 + d

[0029] The values ​​of C, D, E, and F are calculated from the drawings, while the values ​​of R and d are directly given on the drawings. After confirming the lengths of current-carrying leads 2 and 3, you can directly configure the detachable leads. Then, crimp the bushing terminals 1 and 2 on the bushing side and the switch terminals 1 and 2 on the switch side.

[0030] The present invention avoids the work of installing the sleeve during lead wire trial assembly, greatly reduces labor intensity and improves production efficiency.

Claims

1. A method for measuring and positioning a detachable lead terminal of a transformer, characterized in that The method comprises the following steps: arranging a current-carrying lead 2 (7) and a current-carrying lead 3 (8) side by side in a shielding tube (13); one end of the current-carrying lead 2 and the current-carrying lead 3 extends out of one end of the shielding tube and is provided with a sleeve terminal 1 (9) and a sleeve terminal 2 (10), respectively; the other end extends out of the other end of the shielding tube and is provided with a switch terminal 1 (11) and a switch terminal 2 (12), respectively; the distance between the connection point of the current-carrying lead 2 and the sleeve terminal and one end of the shielding tube is C, the longitudinal distance of the current-carrying lead 2 in the shielding tube is D, the center radius of the transition arc of the current-carrying lead 2 in the shielding tube is R, the transverse distance of the current-carrying lead 2 in the shielding tube is E, the distance between the connection point of the current-carrying lead 2 and the switch terminal and the other end of the shielding tube is F, and the distance between the connection holes of the switch terminal 1 and the switch terminal 2 is d; and calculating the lengths of the current-carrying lead 2 and the current-carrying lead 3 by the following formula: The length of the second current-carrying lead = C + D + (3.14R / 2) + E + F The length of current-carrying lead 3 = the length of current-carrying lead 2 + d After the lengths of the current-carrying leads 2 and 3 are confirmed, the detachable leads can be directly configured, and then the bushing terminal 1 and bushing terminal 2 on the bushing side and the switch terminal 1 and switch terminal 2 on the switch side are crimped.

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