A method and apparatus for power transformer tank outline dimension measurement

Abstract

The present application belongs to the field of transformer detection, and particularly relates to a method and device for measuring the size of the outer shape of a power transformer box, which comprises a power transformer box, a mouth-shaped support, an aluminum square tube, a laser line projector and a line hanging plummet; the mouth-shaped support is arranged on the front side of the power transformer box, the aluminum square tube is attached to the mouth-shaped support, the line hanging plummet is arranged on both ends of the aluminum square tube, the laser line projector is matched with the line hanging plummet, the mouth-shaped support is provided with two groups, and the two groups of mouth-shaped supports are respectively arranged on both ends of the front side of the power transformer box, a switch type magnetic suction seat is arranged between the power transformer box and the mouth-shaped support, the mouth-shaped support is connected with the power transformer box through the switch type magnetic suction seat, and the switch type magnetic suction seat is fixedly connected with the power transformer box; the size of the outer shape of the power transformer box is accurately measured through the cooperation between the components.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transformer detection, in particular to a method and device for measuring the outer shape size of a power transformer tank. BACKGROUND

[0002] When a power transformer is transported by railway or highway, the outer shape size of the tank is strictly required. If the measured value deviates greatly from the actual value, it will directly affect normal loading and transportation, so the outer shape size of the tank needs to be measured in advance.

[0003] Usually, the outer shape size of the transformer tank is obtained by adding up the sizes, that is, the outer shape size = the measured inner diameter size of the oil tank + the thickness of the tank wall + the corresponding size of the outer side reinforcing iron and other parts.

[0004] The existing measurement method has two problems: first, it does not consider that the influence of the tank wall flatness deviation and the reinforcing iron height difference will be transferred to the outer shape size; second, it does not consider that the tank walls of the transformer tank are uneven due to their own structure, and the uneven points are not in a straight line or a plane, so it is difficult to find the real outer convex point by the conventional measurement method. These accumulated errors can reach 30-50mm. Therefore, a method and device for measuring the outer shape size of a power transformer tank are proposed to solve the above problems. SUMMARY

[0005] In order to overcome the defects of the prior art and the problem of large error in the existing measurement method of the outer shape size of the transformer tank, the present application provides a method and device for measuring the outer shape size of a power transformer tank.

[0006] The technical scheme adopted by the present application to solve the technical problem is: the device for measuring the outer shape size of a power transformer tank comprises a power transformer tank, a H-shaped support, an aluminum square tube, a laser line projector and a line hanging weight. The H-shaped support is arranged on the front side of the power transformer tank, the aluminum square tube is attached to the H-shaped support, the line hanging weight is arranged at both ends of the aluminum square tube, and the laser line projector cooperates with the line hanging weight. The outer shape size of the power transformer tank is accurately measured through the cooperation between the components.

[0007] Preferably, the H-shaped support is provided with two groups, and the two groups of H-shaped supports are arranged at both ends of the front side of the power transformer tank. The two groups of H-shaped supports are arranged on the same horizontal line. By fixing the two groups of H-shaped supports on the same horizontal line, the phenomenon of inclination of the aluminum square tube placed on the two groups of H-shaped supports is prevented, and the measurement error caused by inclination is avoided.

[0008] Preferably, a switch type magnetic suction base is arranged between the power transformer box and the H-shaped support, the H-shaped support is connected with the power transformer box through the switch type magnetic suction base, the switch type magnetic suction base is fixedly connected with the power transformer box, and the switch type magnetic suction base facilitates the connection and dismounting of the H-shaped supports.

[0009] Preferably, the cross-sectional dimension of the aluminum square tube is 45*75*3 (width*height*thickness, unit: mm), and the length of the aluminum square tube is greater than or equal to six meters, so that the situation that the measurement cannot be performed due to the insufficient length of the aluminum square tube is avoided.

[0010] Preferably, the H-shaped support is composed of four angle steels, and the height is 200 mm and the width is 100 mm, so that the stability and load-bearing capacity of the H-shaped support are enhanced.

[0011] Preferably, the upper and lower narrow edge surfaces of the H-shaped support and the aluminum square tube are leveled by machining, so that the error in measurement is reduced.

[0012] A method for measuring the external dimension of a power transformer box, the measurement method comprising the following steps:

[0013] S1: hoisting the power transformer box to a work station provided with a platform, then placing two groups of H-shaped supports at the two end positions of the same side wall of the power transformer box, with the height being half of the overall height, and fixing the H-shaped supports by using a switch type magnetic suction base;

[0014] S2: abutting the narrow edge side of the aluminum square tube against the vertical surface of the H-shaped support, adjusting the two ends of the aluminum square tube to a horizontal state and keeping the aluminum square tube still;

[0015] S3: vertically hanging a drop line plummet at one end of the aluminum square tube, and then marking the vertical point P1 of the drop line plummet on the platform;

[0016] S4: going to the opposite wall of the power transformer box, repeating the above steps, marking the P2 point, connecting the P1 point and the P2 point, and drawing a straight line;

[0017] S5: turning on the laser line projector, placing the laser line projector at the P1 point on the platform, after calibration, adjusting the laser line projector so that a laser vertical line coincides with the P1-P2 straight line, and moving the laser line projector left and right along the straight line;

[0018] S6: Observe another vertical laser line. When a laser point or line appears at any position on the wall of the power transformer box, mark the laser line projector position point X1 on the platform.

[0019] S7: Go to the other side of the power transformer box, opposite the box wall, and repeat S5 and S6 to mark point X2;

[0020] S8: Measure the straight-line distance between X1 and X2 to obtain the external limit dimension of the power transformer enclosure.

[0021] Preferably, the laser line projector in S5 has at least two vertical line visibility functions and a self-calibration function, and the working distance of the laser line projector is not less than 20 meters. It has strong anti-interference ability, is portable and easy to move. By using the laser line projector with two vertical line visibility functions, it is convenient to measure the external limit dimensions of the power transformer box.

[0022] The advantages of this invention are:

[0023] This invention improves the accuracy of transformer enclosure dimension measurement through a structural design that combines a U-shaped bracket, aluminum square tube, laser line projector, plumb bob, and switchable magnetic base. The switchable magnetic base connects the U-shaped bracket to the transformer enclosure. The method of suspending the plumb bob on the aluminum square tube and measuring its suspension point with the laser line projector enhances the accuracy of transformer enclosure measurement, solving the problem of large errors in existing transformer enclosure dimension measurement methods. By using a laser line projector in conjunction with the U-shaped bracket, aluminum square tube, plumb bob, and switchable magnetic base, the true outward protrusion of the transformer enclosure wall can be located. This direct measurement method replaces the cumulative indirect measurement method, significantly reducing measurement errors, improving detection accuracy, and making operation more convenient. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Fig. 1 This is a schematic diagram of the method flow in Example 1;

[0026] Fig. 2 This is a schematic diagram of the overall three-dimensional structure of Example 1;

[0027] Fig. 3 This is a partial three-dimensional structural schematic diagram of Example 1.

[0028] In the figure: 1, power transformer box; 2, H-shaped support; 3, aluminum square tube; 4, laser line projector; 5, wire hanging plummet; 6, switch type magnetic seat. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] Embodiment one

[0031] Please refer to Figs. 1-3 As shown in the figure, a method and device for measuring the size of a power transformer box, comprising a power transformer box 1, an H-shaped support 2, an aluminum square tube 3, a laser line projector 4 and a wire hanging plummet 5; the H-shaped support 2 is arranged on the front side of the power transformer box 1, the aluminum square tube 3 is attached to the H-shaped support 2, the wire hanging plummet 5 is arranged at both ends of the aluminum square tube 3, and the laser line projector 4 is matched with the wire hanging plummet 5.

[0032] When the size of the power transformer box 1 is to be measured, the power transformer box 1 is first hoisted to a work station provided with a platform, then two groups of H-shaped supports 2 are placed at both ends of the same side wall of the power transformer box 1, the height being half of the overall height, the narrow side of the aluminum square tube 3 is then attached to the vertical surface of the H-shaped support 2, the two ends of the aluminum square tube 3 are adjusted to be horizontal and kept stationary, then the wire hanging plummet 5 is hung at one end of the aluminum square tube 3, the vertical point P1 of the wire hanging plummet 5 is then marked on the platform, then the opposite wall of the power transformer box 1 is reached, the wire hanging plummet 5 is hung at the other end of the aluminum square tube 3, the vertical point P2 of the wire hanging plummet 5 is then marked on the platform, the P1 point and the P2 point are connected, and a straight line is drawn, then the laser line projector 4 is turned on and placed on the platform at the P1 point, after calibration, the laser line projector 4 is adjusted so that a laser vertical line coincides with the P1-P2 straight line, and the laser line projector 4 is moved left and right along the line, another laser vertical line is observed, and when a laser point or line appears on any position of the wall of the power transformer box 1, the position point X1 of the laser line projector on the platform is marked, the opposite wall of the power transformer box 1 is reached, the wire hanging plummet 5 is hung at both ends of the aluminum square tube 3 on the other side of the power transformer box 1, the vertical points of the wire hanging plummet 5 are then marked on the platform, and the laser line projector 4 is used again to observe the other laser vertical line and mark the X2 point, and the distance between the X1 and X2 straight lines is measured to obtain the size value of the power transformer box 1.

[0033] The H-shaped support 2 is provided with two groups, and the two groups of H-shaped supports 2 are respectively arranged at both ends of the front side of the power transformer box 1, and the two groups of H-shaped supports 2 are arranged on the same horizontal line.

[0034] When working, the two groups of H-shaped supports 2 are fixed on the same horizontal line to prevent the aluminum square tube 3 from being placed on the two groups of H-shaped supports 2 from being tilted, and to avoid errors caused by tilting.

[0035] The power transformer box 1 and the H-shaped support 2 are provided with a switch type magnetic seat 6, the H-shaped support 2 is connected with the power transformer box 1 through the switch type magnetic seat 6, and the switch type magnetic seat 6 is fixedly connected with the power transformer box 1.

[0036] When working, the two groups of H-shaped supports 2 are respectively placed at both ends of the same side wall of the power transformer box 1, and the height is half of the overall height, and the H-shaped support 2 is fixed by using the switch type magnetic seat 6, and the switch type magnetic seat 6 is used to conveniently connect and disassemble the H-shaped support 2. The H-shaped support 2 can be conveniently fixed during measurement, and the H-shaped support 2 can be conveniently removed after measurement.

[0037] The cross-sectional size of the aluminum square tube 3 is 45×75×3 (width×height×thickness, unit: mm), and the length of the aluminum square tube 3 is greater than or equal to six meters.

[0038] When working, the length of the aluminum square tube 3 is greater than or equal to six meters to avoid the situation that the length of the aluminum square tube 3 is insufficient to measure.

[0039] The H-shaped support 2 is composed of four angle steels, with a height of 200mm and a width of 100mm.

[0040] When working, the H-shaped support 2 composed of angle steels plays a role in enhancing the stability and load-bearing capacity of the H-shaped support 2.

[0041] The upper and lower narrow edge surfaces of the H-shaped support 2 and the aluminum square tube 3 are machined to be flat.

[0042] When working, the machining of the upper and lower narrow edge surfaces of the H-shaped support 2 and the aluminum square tube 3 plays a role in reducing the error during measurement.

[0043] A method for measuring the size of a power transformer box, the method comprising the following steps:

[0044] S1: hoist the power transformer box 1 to the work station with a platform, then place two groups of the H-shaped support 2 on the same side of the power transformer box 1 at the two end positions of the box wall, at a height of half the overall height, and fix the H-shaped support 2 using the switch type magnetic seat 6;

[0045] S2: stick the narrow side of the aluminum square tube 3 against the vertical surface of the H-shaped support 2, adjust the two ends of the aluminum square tube 3 to the horizontal state and keep it still;

[0046] S3: hang the drop line weight 5 at one end of the aluminum square tube 3, then mark the drop point P1 of the drop line weight 5 on the platform;

[0047] S4: go to the opposite box wall of the power transformer box 1, repeat the above steps, mark the P2 point, connect the P1 point and the P2 point, and draw a straight line;

[0048] S5: turn on the laser line projector 4, place it at the P1 point on the platform, after calibration, adjust the laser line projector 4 so that a laser vertical line coincides with the P1-P2 straight line, and move the laser line projector 4 left and right along this line;

[0049] S6: observe the other laser vertical line, and when a laser point or line appears on any position of the box wall of the power transformer box 1, mark the laser line projector position point X1 on the platform;

[0050] S7: go to the opposite box wall of the power transformer box 1, repeat S5 and S6 to mark the X2 point;

[0051] S8: measure the straight line distance of X1 and X2 to obtain the outer limit size value of the power transformer box 1.

[0052] The laser line projector 4 in S5 has at least two vertical line visible functions and self-calibration functions, and the working distance of the laser line projector 4 is not less than 20 meters, with strong anti-interference ability, portability and easy movement;

[0053] When working, the laser line projector 4 with two vertical line visible functions is used to facilitate the measurement of the outer limit size value of the power transformer box 1.

[0054] Working principle: when the outer dimensions of the power transformer tank 1 are measured, first, the power transformer tank 1 is hoisted to the work station provided with a platform, then two groups of mouth-shaped supports 2 are placed at the two end positions of the same side tank wall of the power transformer tank 1, the height is at half of the overall height, and the mouth-shaped supports 2 are fixed by using the on-off magnetic seat 6, then the narrow side of the aluminum square tube 3 is attached to the vertical surface of the mouth-shaped support 2, the two ends of the aluminum square tube 3 are adjusted to the horizontal state and kept stationary, then the drop line plummet 5 is hung at one end of the aluminum square tube 3, then the vertical point P1 of the drop line plummet 5 is marked on the platform, then the opposite tank wall of the power transformer tank 1 is reached, the drop line plummet 5 is hung at the other end of the aluminum square tube 3, then the vertical point P2 of the drop line plummet 5 is marked on the platform, the P1 point and the P2 point are connected, and a straight line is drawn, then the laser line projector 4 is turned on and placed on the platform at the P1 point position, after calibration, the laser line projector 4 is adjusted so that a laser vertical line coincides with the P1-P2 straight line, and the laser line projector 4 is moved left and right along the line, another laser vertical line is observed, and when a laser point or line appears on the tank wall of the power transformer tank 1, the laser line projector position point X1 is marked on the platform, the opposite tank wall of the power transformer tank 1 is reached, the drop line plummet 5 is hung at the two ends of the aluminum square tube 3 on the other side of the power transformer tank 1, then the vertical point of the drop line plummet 5 is marked on the platform, and the laser line projector 4 is used again to observe the other laser vertical line and mark the X2 point, and the X1 and X2 straight line distance is measured to obtain the outer limit size value of the power transformer tank 1.

[0055] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A device for electrical transformer tank outer shape dimension measurement, characterized by: The utility model provides a kind of electric power transformer box, including electric power transformer box (1), mouth-shaped support (2), aluminium square tube (3), laser line projector (4) and hanging line plummet (5);The mouth-shaped support (2) is arranged at the front side of electric power transformer box (1), the aluminium square tube (3) is attached with mouth-shaped support (2), the hanging line plummet (5) is arranged at the both ends of aluminium square tube (3), the laser line projector (4) is matched with hanging line plummet (5); Wherein, the mouth-shaped support (2) is provided with two groups, and the two groups of mouth-shaped support (2) are respectively arranged at the both ends of the front side of electric power transformer box (1), and the two groups of mouth-shaped support (2) are arranged on the same horizontal line; The electric power transformer box (1) and mouth-shaped support (2) are provided with on-off magnetic seat (6), the mouth-shaped support (2) is connected with electric power transformer box (1) by on-off magnetic seat (6), and the on-off magnetic seat (6) is fixedly connected with electric power transformer box (1).

2. A device for measuring the outer dimensions of a power transformer tank according to claim 1, characterized in that: The cross-sectional dimension of the aluminium square tube (3) is 45x75x3 (widthxheightxthickness, unit: mm), and the length of the aluminium square tube (3) is greater than or equal to six meters.

3. A device for measuring the dimensions of a power transformer tank according to claim 2, characterized in that: The mouth-shaped support (2) is composed of four angle steels, with a height of 200 mm and a width of 100 mm.

4. A device for measuring the outer dimensions of a power transformer tank according to claim 3, characterized in that: The narrow side surfaces of the upper and lower ends of the mouth-shaped support (2) and the aluminium square tube (3) are leveled by machining.

5. A method for measuring the size of a power transformer tank, comprising the device for measuring the size of a power transformer tank according to any one of claims 1-4, characterized in that: The method for measuring includes the following steps: S1: hoist the electric power transformer box (1) to the station provided with a platform, then place the two groups of mouth-shaped supports (2) at the both ends of the same side wall of the electric power transformer box (1), with the height being half of the overall height, and fix the mouth-shaped supports (2) by using the on-off magnetic seat (6); S2: attach the narrow side of the aluminium square tube (3) to the vertical surface of the mouth-shaped support (2), adjust the both ends of the aluminium square tube (3) to the horizontal state and keep it still; S3: vertically hang the hanging line plummet (5) at one end of the aluminium square tube (3), then mark the vertical point P1 of the hanging line plummet (5) on the platform; S4: go to the opposite wall of the electric power transformer box (1), repeat the above steps, mark the P2 point, connect the P1 point and the P2 point, and draw a straight line; S5: turn on the laser line projector (4), place it at the P1 point on the platform, after calibration, adjust the laser line projector (4) so that a laser vertical line coincides with the P1-P2 straight line, and move the laser line projector (4) along this line left and right; S6: observe the other laser vertical line, and when a laser point or line appears on any position of the wall of the electric power transformer box (1), mark the position point X1 of the laser line projector on the platform; S7: go to the opposite wall of the electric power transformer box (1), repeat S5 and S6 to mark the X2 point; S8: measure the straight line distance between X1 and X2 to obtain the outer dimension value of the electric power transformer box (1).

6. A method for measuring the outer dimensions of a power transformer tank according to claim 5, characterized in that: The laser line projector (4) in S5 has at least two vertical line visible functions and self-calibration functions, and the working distance of the laser line projector (4) is not less than 20 meters, with strong anti-interference ability, portability and easy movement.

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