A testing tool and method for manufacturing deformation detection of external oil type metal corrugated oil tank

Abstract

The present application belongs to the technical field of manufacturing outer oil type metal corrugated oil tank, in particular to a gauge and method for deformation detection of outer oil type metal corrugated oil tank manufacturing, the outer oil type metal corrugated oil tank and the structural frame to be detected are respectively installed on the detection platform, the transmission mechanism is arranged on the structural frame, the transmission mechanism comprises a horizontal module and a vertical module, the fixed part of the horizontal module or the vertical module is connected with the structural frame, the distance measuring sensor is installed on the output part of the vertical module or the horizontal module, through the joint action of the horizontal module and the vertical module, the reference plane perpendicular to the upper surface of the detection platform is formed on the structural frame, and the distance measuring sensor stays at any set point on the reference plane under the joint action of the horizontal module and the vertical module and carries out distance measurement. The present application establishes a high-precision measurement reference plane, and can realize accurate point taking and repeated point taking, and solves the problem of insufficient measurement precision of the prior art through the high-precision distance measuring sensor.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology of externally coated corrugated metal oil tanks, specifically a tool and method for detecting deformation during the manufacturing of externally coated corrugated metal oil tanks. Background Technology

[0002] Externally coated corrugated metal oil conservators are products used for oil storage in transformers in the power industry. Because these conservators are subjected to various loads during operation, including positive, negative, and cyclic loads, and their functional stability is closely related to their external structure, accurately detecting changes in the external structure under different loads is crucial in the research and development and manufacturing of externally coated metal oil conservators.

[0003] Because externally mounted corrugated metal oil tanks are typically large, with some exceeding ten cubic meters in volume, their outer contour becomes an irregular curved surface under load. The dimensions of this curved surface significantly impact product performance but are difficult to measure. Currently, a straight guide plate is typically used as a reference, and depth gauges and rulers are employed to select multiple measurement points on the curved surface for measurement. These measurements are taken at designated points under different load conditions. Figure 1A , Figure 1B As shown, the deformation detection of an externally coated corrugated metal oil tank under load mainly involves detecting the deformation of its outer contour under positive and negative pressure. This is achieved by measuring the change in distance between the original outer contour curve 1 and the negative pressure outer contour curve 2, or between the original outer contour curve 1 and the positive pressure outer contour curve 3. In existing technology, a right-angle ruler 4 is used to align with the highest point of the outer contour of the externally coated corrugated metal oil tank, and then a measuring tool is used to measure the distance L from the point where the ruler is not aligned to the right-angle ruler 4. Finally, the data is compared to obtain the surface deformation data of the externally coated corrugated metal oil tank product for product development and finished product inspection. However, the existing measurement method suffers from limitations. The positioning reference is affected by the deformation under load, resulting in a variable and unfixed reference position. This makes the detection difficult, time-consuming, and prone to significant measurement errors. It cannot accurately and vividly reflect the deformation of the externally coated corrugated metal oil tank under different loads. Furthermore, cost constraints make it unsuitable for finished products such as coordinate measuring machines (CMMs) that can meet this dimensional detection requirements. Summary of the Invention

[0004] In view of the above-mentioned problems in the load-bearing deformation detection of existing external oil-coated corrugated metal oil tanks, the purpose of this invention is to provide a gauge and method for detecting the manufacturing deformation of external oil-coated corrugated metal oil tanks.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The inspection fixture of the present invention includes an inspection platform, a structural frame, a transmission mechanism, a distance sensor, and a numerical control acquisition system. The external oil-filled corrugated metal tank to be inspected and the structural frame are respectively mounted on the inspection platform. The structural frame is located on one side of the external oil-filled corrugated metal tank to be inspected. The transmission mechanism is mounted on the structural frame and includes a horizontal module and a vertical module. The fixing part of the horizontal or vertical module is connected to the structural frame. The distance sensor is mounted on the output part of the vertical or horizontal module. Through the combined action of the horizontal and vertical modules, a reference plane perpendicular to the upper surface of the inspection platform is formed on the structural frame. Under the combined action of the horizontal and vertical modules, the distance sensor stops at any set point on the reference plane and performs distance measurement. The horizontal module, vertical module, and distance sensor are respectively connected to the numerical control acquisition system.

[0007] Wherein: there is one horizontal module and two vertical modules arranged in parallel. The horizontal module and the two vertical modules form an "I" shape rotated 90°. The fixed parts of the two vertical modules are respectively fixed to the structural frame. The fixed part of the horizontal module is connected to the output part of the two vertical modules. The ranging sensor is installed on the output part of the horizontal module.

[0008] The horizontal module includes a horizontal slider, a horizontal servo motor, a horizontal lead screw, a horizontal linear guide, and a horizontal nut. The horizontal linear guide serves as the fixing part of the horizontal module, fixed to the structural frame or connected to the output part of the vertical module. A horizontal lead screw is rotatably mounted on the horizontal linear guide. The horizontal servo motor is fixed to the horizontal linear guide, and its output end is connected to the horizontal lead screw. A horizontal nut is threaded onto the horizontal lead screw, forming a helical pair. The horizontal slider, serving as the output part of the horizontal module, is connected to the horizontal nut. The horizontal servo motor drives the horizontal lead screw to rotate, and the helical pair between the horizontal lead screw and the horizontal nut transforms into a sliding pair along the axial direction of the horizontal lead screw, realizing the reciprocating movement of the horizontal slider in the horizontal direction.

[0009] The vertical module includes a vertical slider, a vertical motion servo motor, a vertical lead screw, a vertical linear guide rail, and a vertical lead screw nut. The vertical linear guide rail is fixed to the structural frame as a fixing part of the vertical module or connected to the output part of the horizontal module. The vertical lead screw is rotatably mounted on the vertical linear guide rail. The vertical motion servo motor is fixed on the vertical linear guide rail, and the output end of the vertical motion servo motor is connected to the vertical lead screw. The vertical lead screw is threaded with a vertical lead screw nut, forming a helical pair. The vertical slider, which serves as the output part of the vertical module, is connected to the vertical lead screw nut. The vertical motion servo motor drives the vertical lead screw to rotate, and the helical pair between the vertical lead screw and the vertical lead screw nut becomes a sliding pair along the axial direction of the vertical lead screw, realizing the reciprocating movement of the vertical slider in the vertical direction.

[0010] The testing platform is a cast iron platform with its upper surface parallel to the horizontal plane.

[0011] The present invention relates to a method for detecting deformation during the manufacturing of externally coated corrugated metal oil tanks, the specific steps of which are as follows:

[0012] Step A: Determine the set points on the outer contour surface of the unloaded external oil-type corrugated metal oil tank;

[0013] Step B: The CNC acquisition system controls the horizontal module and the vertical module to move the distance measuring sensor on the reference plane to a position corresponding to the set point, and measures the distance between the distance measuring sensor and the set point, which is then recorded by the CNC acquisition system.

[0014] Step C: Apply a load to the external oil-type corrugated metal oil tank, measure the distance between it and the set point again using the distance measuring sensor, and record it by the numerical control acquisition system;

[0015] Step D: By subtracting the distances measured in Step C and Step B, the deformation at the set point under the applied load can be measured.

[0016] Step E: Apply different loads to the external oil-type corrugated metal oil tank, measure the distance between it and the set point again using the distance measuring sensor, and record it by the numerical control acquisition system;

[0017] Step F: By subtracting the distances measured in Step E and Step B, the deformation of the set point under different loads can be measured.

[0018] Step G: Pre-select a set number of measurement points on the outer contour surface of the external oil-type corrugated metal oil tank to be tested to form a point set; follow the operations of steps A to F to measure each pre-selected measurement point to form the deformed surface of the outer contour surface of the external oil-type corrugated metal oil tank under different loads.

[0019] The advantages and positive effects of this invention are as follows:

[0020] 1. This invention establishes a high-precision measurement reference surface and enables precise and repeated point sampling. By using a high-precision ranging sensor, it solves the problem of insufficient measurement accuracy in existing technologies.

[0021] 2. The measurement reference surface of the present invention is not affected by the deformation of the external oil-type corrugated metal oil tank, thus ensuring the accuracy of the measurement.

[0022] 3. This invention replaces manual point taking with a transmission mechanism, solving the problems of frequent, labor-intensive, and inaccurate manual positioning in existing technologies, while also ensuring the accuracy of multiple positioning operations.

[0023] 4. The measurement data of this invention is transmitted and stored in the data processing system in real time, ensuring the accuracy and traceability of the data.

[0024] 5. This invention is applicable to the testing of most oil storage tank products currently on the market. Attached Figure Description

[0025] Figure 1A A schematic diagram of the structure of an externally coated corrugated metal oil tank that bears deformation.

[0026] Figure 1B A schematic diagram of the existing structure for measuring the load-bearing deformation of the outer contour of an externally coated corrugated metal oil tank.

[0027] Figure 2 This is a schematic diagram of the structure of the inspection tool of the present invention during testing;

[0028] Figure 3 This is a schematic diagram of the transmission mechanism in the inspection fixture of the present invention;

[0029] Figure 4 This is a side view of the transmission mechanism in the inspection fixture of the present invention mounted on the structural frame;

[0030] Figure 5 This is a schematic diagram of the structural principle of the inspection tool of the present invention for testing;

[0031] Figure 6 This is a schematic diagram of the measurement point structure of the present invention;

[0032] Wherein: 1 is the original outer contour curve, 2 is the negative pressure outer contour curve, 3 is the positive pressure outer contour curve, 4 is the right angle straightedge, 5 is the detection platform, 6 is the structural frame, 7 is the transmission mechanism, 8 is the distance sensor, 9 is the CNC acquisition system, 10 is the horizontal slider, 11 is the horizontal movement servo motor, 12 is the horizontal lead screw, 13 is the horizontal linear guide rail, 14 is the vertical slider, 15 is the vertical movement servo motor, 16 is the vertical lead screw, 17 is the vertical linear guide rail, and 18 is the external oil type metal corrugated oil tank. Detailed Implementation

[0033] The invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figures 2-4 As shown, the inspection fixture of the present invention includes a detection platform 5, a structural frame 6, a transmission mechanism 7, a distance sensor 8, and a numerical control acquisition system 9. The external oil-filled corrugated metal storage tank 18 to be inspected and the structural frame 6 are respectively fixed on the detection platform 5. The structural frame 6 is located on one side of the external oil-filled corrugated metal storage tank 18 to be inspected. The transmission mechanism 7 is disposed on the structural frame 6 and includes a horizontal module and a vertical module. The fixing part of the horizontal or vertical module is connected to the structural frame 6. The distance sensor 8 is installed on the output part of the vertical or horizontal module. Through the combined action of the horizontal and vertical modules, a reference plane perpendicular to the upper surface of the detection platform 5 is formed on the structural frame 6. Under the combined action of the horizontal and vertical modules, the distance sensor 8 stops at any set point on the reference plane and performs distance measurement. The horizontal module, the vertical module, and the distance sensor 8 are respectively connected to the numerical control acquisition system 9 through data transmission lines.

[0035] In this embodiment, the testing platform 5 is a square cast iron platform used to fix the external oil-type corrugated metal oil tank 18 and the transmission mechanism 7 to be tested. The upper surface of the testing platform 5 is parallel to the horizontal plane and the flatness is above the calibration level to ensure the relative positional relationship between the inspection tool and the product being inspected.

[0036] In this embodiment, the structural frame 6 is a metal frame, which may be made of stainless steel, and is used to connect the detection platform 5 and the transmission mechanism 7.

[0037] The horizontal module includes a horizontal slider 10, a horizontal motion servo motor 11, a horizontal lead screw 12, a horizontal linear guide rail 13, and a horizontal lead screw nut. The horizontal linear guide rail 13 serves as the fixing part of the horizontal module and is fixed to the structural frame 6 or connected to the output part of the vertical module. The horizontal lead screw 12 is rotatably mounted on the horizontal linear guide rail 13. The horizontal motion servo motor 11 is fixed to the horizontal linear guide rail 13, and the output end of the horizontal motion servo motor 11 is connected to the horizontal lead screw 12. A horizontal lead screw nut is threaded onto the horizontal lead screw 12, forming a helical pair. The horizontal slider 10, serving as the output part of the horizontal module, is connected to the horizontal lead screw nut. The horizontal motion servo motor 11 drives the horizontal lead screw 12 to rotate, and through the helical pair between the horizontal lead screw 12 and the horizontal lead screw nut, the horizontal slider 10 moves along the axial direction of the horizontal lead screw 12, thus realizing the horizontal movement of the horizontal slider 10 in the horizontal direction (i.e., Figure 3 The reciprocating movement (in the X-axis direction).

[0038] The vertical module includes a vertical slider 14, a vertical motion servo motor 15, a vertical lead screw 16, a vertical linear guide rail 17, and a vertical lead screw nut. The vertical linear guide rail 17 serves as the fixing part of the vertical module and is fixed to the structural frame 6 or connected to the output part of the horizontal module. The vertical lead screw 16 is rotatably mounted on the vertical linear guide rail 17. The vertical motion servo motor 15 is fixed on the vertical linear guide rail 17, and the output end of the vertical motion servo motor 15 is connected to the vertical lead screw 16. A vertical lead screw nut is threaded onto the vertical lead screw 16, forming a helical pair. The vertical slider 14, serving as the output part of the vertical module, is connected to the vertical lead screw nut. The vertical motion servo motor 15 drives the vertical lead screw 16 to rotate. Through the helical pair between the vertical lead screw 16 and the vertical lead screw nut, the vertical slider 14 becomes a moving pair along the axial direction of the vertical lead screw 16, realizing the vertical slider 14 moving in the vertical direction (i.e., Figure 3 The reciprocating movement (in the Y-axis direction).

[0039] In this embodiment, the transmission mechanism 7 is a two-axis linear guide structure. There is one horizontal module and two parallel vertical modules, forming an "I" shape rotated 90°. The fixed parts (i.e., vertical linear guides 17) of the two vertical modules are fixed to the structural frame 6. The fixed part (i.e., horizontal linear guide 13) of the horizontal module is connected to the output parts (i.e., vertical sliders 14) of the two vertical modules. The ranging sensor 8 is mounted on the output part (i.e., horizontal slider 10) of the horizontal module. The vertical movement servo motors 15 in the two vertical modules work synchronously, driving the vertical sliders 14 in their respective vertical modules to move up and down synchronously, thereby causing the horizontal module and the ranging sensor 8 to reciprocate vertically. The horizontal servo motor 11 in the horizontal module works, driving the horizontal slider 10 in the horizontal module to move in the horizontal direction, thereby driving the distance sensor 8 to move back and forth in the horizontal direction, thereby realizing the measurement of different positions on the outer contour surface of the external oil-type corrugated metal oil tank 18, and supporting repeated point measurement at the same position.

[0040] The ranging sensor 8 in this embodiment is an existing measurement product with a measurement accuracy of 0.1mm. The ranging sensor 8 can stay at any point on the reference plane and perform distance measurement, and output signals to the numerical control acquisition system 9 through the data transmission line.

[0041] The numerical control acquisition system 9 in this embodiment is existing technology. It is a computer that integrates servo motor control and data acquisition and processing. It can issue commands to the horizontal servo motor 11 and the vertical servo motor 15 to control the transmission mechanism 7, which is powered by the servo motor, to move the relative position of the distance measuring sensor 8 installed on the transmission mechanism 7. It drives the distance measuring sensor 8 to a designated position to realize the fixed-point distance measurement of the distance measuring sensor 8 and record the distance measurement parameters. By integrating specific distance parameters under different loads, the deformation of the external oil-type corrugated metal oil tank 18 at specific positions under different loads can be measured. By taking multiple positions and forming a curved surface, the deformation curved surface of the external oil-type corrugated metal oil tank 18 can be obtained, thereby realizing the deformation detection of the external oil-type corrugated metal oil tank 18 under different loads.

[0042] This invention relates to a method for detecting deformation during the manufacturing of externally coated corrugated metal oil tanks. The method utilizes the inspection fixture of this invention, and the specific steps are as follows:

[0043] Step A: Determine the set point on the outer contour surface of the unloaded external oil-type corrugated metal oil tank 18;

[0044] Step B: The CNC acquisition system 9 controls the horizontal module and the vertical module to move the distance sensor 8 on the reference plane to the position corresponding to the set point, and measures the distance between the distance sensor 8 and the set point, which is marked as L0 and recorded by the CNC acquisition system 9.

[0045] Step C: Apply a load to the external oil-type corrugated metal oil tank 18, measure the distance between it and the set point again through the distance sensor 8, mark it as L1, and record it by the CNC acquisition system 9;

[0046] Step D involves subtracting the distances measured in steps C and B (i.e., subtracting the values ​​of L1 and L0) to determine the deformation at the set point under applied load; for example... Figure 5 As shown;

[0047] Step E: Apply different loads to the external oil-type corrugated metal oil tank 18, and measure the distance between it and the set point again through the distance measuring sensor 8. The center of the mark is L2...LN, and the distance is recorded by the numerical control acquisition system 9.

[0048] Step F: By subtracting the distances measured in Step E and Step B (i.e., by subtracting the values ​​of L2...LN from L0), the deformation of the set point under different loads can be measured.

[0049] Step G, as Figure 6As shown, according to specific requirements, a set number of measurement points are pre-selected on the outer contour surface of the external oil-type corrugated metal oil tank 18 to be tested, forming a point set; according to steps A to F, each pre-selected measurement point is measured separately, and the point set data of each set point under different loads is input into the drawing software, which can form the deformed curved surface of the outer contour surface of the external oil-type corrugated metal oil tank 18 under different loads, which is used for the research and development and manufacturing of the external oil-type corrugated metal oil tank 18.

[0050] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be defined by the claims.

Claims

1. A gauge for detecting deformation during the manufacturing of externally coated corrugated metal oil tanks, characterized in that: The system includes a testing platform (5), a structural frame (6), a transmission mechanism (7), a ranging sensor (8), and a numerical control acquisition system (9). The external oil-filled corrugated metal tank (18) to be tested and the structural frame (6) are respectively installed on the testing platform (5). The structural frame (6) is located on one side of the external oil-filled corrugated metal tank (18) to be tested. The transmission mechanism (7) is set on the structural frame (6). The transmission mechanism (7) includes a horizontal module and a vertical module. The horizontal module or the vertical module The fixed part is connected to the structural frame (6). The distance sensor (8) is installed in the output part of the vertical module or the horizontal module. Through the combined action of the horizontal module and the vertical module, a reference plane perpendicular to the upper surface of the detection platform (5) is formed on the structural frame (6). The distance sensor (8) stops at any set point on the reference plane and performs distance measurement under the combined action of the horizontal module and the vertical module. The horizontal module, the vertical module and the distance sensor (8) are respectively connected to the numerical control acquisition system (9).

2. The inspection tool for detecting deformation during the manufacturing of external oil-type corrugated metal oil tanks according to claim 1, characterized in that: The horizontal module is one, and the vertical modules are two parallel ones. The horizontal module and the two vertical modules form an "I" shape rotated 90°. The fixed parts of the two vertical modules are respectively fixed to the structural frame (6). The fixed part of the horizontal module is connected to the output part of the two vertical modules. The ranging sensor (8) is installed on the output part of the horizontal module.

3. The inspection tool for detecting deformation during the manufacturing of external oil-type corrugated metal oil tanks according to claim 1, characterized in that: The horizontal module includes a horizontal slider (10), a horizontal servo motor (11), a horizontal lead screw (12), a horizontal linear guide (13), and a horizontal nut. The horizontal linear guide (13) is fixed to the structural frame (6) as the fixing part of the horizontal module or connected to the output part of the vertical module. The horizontal lead screw (12) is rotatably mounted on the horizontal linear guide (13). The horizontal servo motor (11) is fixed on the horizontal linear guide (13). The output end of the horizontal servo motor (11) is connected to the horizontal lead screw (12). The horizontal lead screw (12) is threaded with a horizontal nut to form a helical pair. The horizontal slider (10), which is the output part of the horizontal module, is connected to the horizontal nut. The horizontal servo motor (11) drives the horizontal lead screw (12) to rotate. Through the helical pair between the horizontal lead screw (12) and the horizontal nut, the horizontal slider (10) moves along the axial direction of the horizontal lead screw (12), realizing the reciprocating movement of the horizontal slider (10) in the horizontal direction.

4. The inspection tool for detecting deformation during the manufacturing of external oil-type corrugated metal oil tanks according to claim 1, characterized in that: The vertical module includes a vertical slider (14), a vertical motion servo motor (15), a vertical lead screw (16), a vertical linear guide rail (17), and a vertical lead screw nut. The vertical linear guide rail (17) is fixed to the structural frame (6) as a fixing part of the vertical module or connected to the output part of the horizontal module. The vertical lead screw (16) is rotatably mounted on the vertical linear guide rail (17). The vertical motion servo motor (15) is fixed on the vertical linear guide rail (17). 5) The output end is connected to the vertical lead screw (16). The vertical lead screw (16) is threaded with a vertical lead nut to form a helical pair. The vertical slider (14), which serves as the output part of the vertical module, is connected to the vertical lead nut. The vertical movement servo motor (15) drives the vertical lead screw (16) to rotate. The helical pair between the vertical lead screw (16) and the vertical lead nut becomes a moving pair of the vertical slider (14) along the axial direction of the vertical lead screw (16), thereby realizing the reciprocating movement of the vertical slider (14) in the vertical direction.

5. The inspection tool for detecting deformation during the manufacturing of external oil-type corrugated metal oil tanks according to claim 1, characterized in that: The testing platform (5) is a cast iron platform with its upper surface parallel to the horizontal plane.

6. A method for detecting deformation during the manufacturing of externally coated corrugated metal oil tanks, characterized in that: Using the inspection tool for deformation detection in the manufacture of external oil-type corrugated metal oil tanks as described in any one of claims 1 to 5, the specific steps are as follows: Step A: Determine the set point on the outer contour surface of the unloaded external oil-type corrugated metal oil tank (18); Step B: The CNC acquisition system (9) controls the horizontal module and the vertical module to move the distance sensor (8) on the reference plane to a position corresponding to the set point, and measures the distance between the set point and the distance sensor (8), which is then recorded by the CNC acquisition system (9). Step C: Apply a load to the external oil-type corrugated metal oil tank (18), measure the distance between it and the set point again through the distance measuring sensor (8), and record it by the numerical control acquisition system (9); Step D: By subtracting the distances measured in Step C and Step B, the deformation at the set point under the applied load can be measured. Step E: Apply different loads to the external oil-type corrugated metal oil tank (18), measure the distance between it and the set point again through the distance measuring sensor (8), and record it by the numerical control acquisition system (9); Step F: By subtracting the distances measured in Step E and Step B, the deformation of the set point under different loads can be measured. Step G: Select a set number of measurement points on the outer contour surface of the external oil-type corrugated metal oil tank (18) to be tested, and form a point set; according to the operation of steps A to F, measure each of the pre-selected measurement points respectively, and the deformed surface of the outer contour surface of the external oil-type corrugated metal oil tank (18) under different loads can be formed.

Images