A gauge for detecting the straightness and span of a long U-shaped tube.

Abstract

This utility model discloses a gauge for detecting the straightness and span of a long U-tube, belonging to the technical field of heat exchanger copper tube processing and mold manufacturing. It includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support. The integrated span detection component and straightness detection component can simultaneously detect the center distance of the copper tube and the straightness, achieving synchronous detection of the two parameters. Moreover, by replacing the U-shaped detection block and the floating inner sleeve component with different sizes and specifications, it can be applied to the rapid detection of copper tubes of different diameters and the accuracy verification of the mold. That is, by using a replaceable inner diameter component to adapt to copper tubes of different diameters, the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger copper tube processing and mold manufacturing, and in particular to a tool for detecting the straightness and span of a long U-tube. Background Technology

[0002] In the manufacturing process of heat exchangers, the accuracy of the copper tube span (center distance) and straightness are key quality indicators. The span dimension directly affects the assembly accuracy of the mold, while straightness deviations can lead to difficulties in inserting the copper tubes or failure of concentricity. Existing testing devices have the following shortcomings:

[0003] Single-function inspection: Traditional gauges are mostly used for single inspection of span or straightness, which requires multiple clamping, resulting in low efficiency and easy introduction of human error;

[0004] Poor pipe diameter adaptability: For copper pipes with different inner diameters, special inspection tools need to be customized, which is costly and cumbersome to replace.

[0005] Delayed mold verification: The lack of inspection methods that match the actual use scenarios of molds makes it impossible to verify the accuracy of mold processing in real time. Therefore, there is an urgent need for an integrated, multi-diameter combo gauge to achieve simultaneous inspection of the span and straightness of long U-tubes, while meeting the rapid inspection needs of copper tubes of different diameters. Utility Model Content

[0006] This invention provides a gauge for detecting the straightness and span of a long U-tube, aiming to solve the aforementioned technical problems.

[0007] The specific technical solution provided by this utility model is as follows:

[0008] This utility model provides a gauge for detecting the straightness and span of a long U-tube. The gauge includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support.

[0009] Optionally, the floating inner sleeve assembly includes an upper sleeve and a lower sleeve that are spliced ​​together to form a hollow circular tube, and the upper support and the lower support are respectively provided with semi-circular grooves that cooperate with the upper sleeve and the lower sleeve.

[0010] Optionally, the floating inner sleeve assembly is used to detect the straightness of the copper tube.

[0011] Optionally, the U-shaped detection block is used to detect the span of the copper tube, and the U-shaped end of the U-shaped detection block mates with the end of the copper tube to be detected.

[0012] Optionally, the surface roughness Ra of the U-shaped detection block is ≤0.2μm, and the straightness error is ≤0.01mm / m.

[0013] This utility model has the following beneficial technical effects:

[0014] This utility model provides a fixture for detecting the straightness and span of a long U-tube. The fixture includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support. By integrating the span detection component and the straightness detection component, it can simultaneously detect the center distance (span) of the copper tube and the straightness, achieving synchronous detection of the two parameters. Moreover, by replacing the U-shaped detection block and the floating inner sleeve component with different sizes and specifications, it can be applied to the rapid detection of copper tubes of different diameters and the accuracy verification of the mold. That is, by replacing the inner diameter component, it can adapt to copper tubes of different diameters, thereby improving the detection efficiency and accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the isometric side structure of a gauge for detecting the straightness and span of a long U-tube according to an embodiment of the present invention.

[0017] Figure 2 This is a front view schematic diagram of a fixture for detecting the straightness and span of a long U-tube according to an embodiment of the present invention.

[0018] Figure 3 This is a top view schematic diagram of a fixture for detecting the straightness and span of a long U-shaped tube according to an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] The following will combine Figures 1-3 A detailed description is provided of a fixture for detecting the straightness and span of a long U-shaped tube according to an embodiment of the present invention.

[0021] refer to Figure 1 , Figure 2 , Figure 3 As shown in the figure, the present invention provides a fixture for detecting the straightness and span of a long U-shaped tube, comprising a base 1, a span detection component 2 fixed on the base 1, and a straightness detection component 3. The span detection component 2 includes an outer shell 21 fixed on the base 1, an inner shell 22 cooperating with the outer shell 21, and a U-shaped detection block 23 fixed on the inner shell 22. The straightness detection component 3 includes a lower support 31, an upper support 32, and a floating inner sleeve component 33 located between the upper support 32 and the lower support 31. Through the structural design of the span detection component 2 and the straightness detection component 3, simultaneous detection of the two parameters is achieved. Furthermore, the interchangeable inner diameter component adapts to copper tubes of different diameters, improving detection efficiency and mold verification accuracy.

[0022] refer to Figure 1 , Figure 2 and Figure 3 As shown, the span detection component 2 includes at least two specifications of U-shaped detection blocks 23 to adapt to the span detection of copper tubes of different lengths. The bottom of the U-shaped detection block 23 is provided with a boss that matches the mold positioning groove, which can be directly installed on the mold station to verify whether the span of the copper tube processed by the mold meets the design requirements. Both the U-shaped detection block 23 and the inner shell 22 adopt a modular inner sleeve structure. The inner wall of the inner sleeve is provided with circular or irregular holes of different diameters (such as φ10mm, φ15mm, φ20mm, etc.), which can be quickly replaced and installed with the main body. The copper tube is placed in the span detection component 2 and adjusted to the fixed mold positioning state. The accuracy of the mold is judged by comparing the center distance with the theoretical value. The lower end of the copper tube is inserted into the straightness detection component 3 and moved axially along the reference axis. By collecting radial offset data, a straightness curve is plotted to determine whether the concentricity requirement is met. The span and straightness are detected simultaneously in one clamping, improving the detection efficiency by 70% and avoiding errors from multiple clamping. By replacing the U-shaped detection block and floating inner sleeve component with different sizes and specifications, it is compatible with the detection of copper tubes with diameters of φ5mm-φ35mm, reducing the cost of custom fixtures. The straightness detection resolution of the floating inner sleeve component reaches 0.01mm, meeting the requirements of high-precision detection.

[0023] refer to Figure 1 , Figure 2 , Figure 3As shown, the floating inner sleeve assembly 33 includes an upper sleeve and a lower sleeve that are spliced ​​together to form a hollow circular tube. The upper support 32 and the lower support 31 are respectively provided with semi-circular grooves that cooperate with the upper and lower sleeves. The floating inner sleeve assembly 33 is used to detect the straightness of the copper tube. The U-shaped detection block 23 is used to detect the span of the copper tube, and the U-shaped end of the U-shaped detection block 23 cooperates with the end of the copper tube 4 to be tested. The surface roughness Ra of the U-shaped detection block 23 is ≤0.2μm, and the straightness error is ≤0.01mm / m.

[0024] This utility model provides a fixture for detecting the straightness and span of a long U-tube. The fixture includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support. By integrating the span detection component and the straightness detection component, it can simultaneously detect the center distance (span) of the copper tube and the straightness, achieving synchronous detection of the two parameters. Moreover, by replacing the U-shaped detection block and the floating inner sleeve component with different sizes and specifications, it can be applied to the rapid detection of copper tubes of different diameters and the accuracy verification of the mold. That is, by replacing the inner diameter component, it can adapt to copper tubes of different diameters, thereby improving the detection efficiency and accuracy.

[0025] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. A gauge for detecting the straightness and span of a long U-shaped tube, characterized in that, The inspection fixture includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support.

2. The inspection fixture according to claim 1, characterized in that, The floating inner sleeve assembly includes an upper sleeve and a lower sleeve that are spliced ​​together to form a hollow circular tube. The upper support and the lower support are respectively provided with semi-circular grooves that cooperate with the upper sleeve and the lower sleeve.

3. The inspection fixture according to claim 2, characterized in that, The floating inner sleeve assembly is used to detect the straightness of the copper tube.

4. The inspection fixture according to claim 1, characterized in that, The U-shaped detection block is used to detect the span of the copper tube, and the U-shaped end of the U-shaped detection block is matched with the end of the copper tube to be detected.

5. The inspection fixture according to claim 1, characterized in that, The surface roughness Ra of the U-shaped detection block is ≤0.2μm, and the straightness error is ≤0.01mm / m.

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