Device for detecting inner diameter of tube core

Abstract

The utility model relates to the technical field of measurement, in particular to a pipe core inner diameter detection device which comprises a straight pipe measurement section, a frustum measurement section with the top face connected with the straight pipe measurement section, and a forward end ring detachably connected with the straight pipe measurement section in an inserted mode, and the outer diameter of the straight pipe measurement section is smaller than the inner diameter of a to-be-detected pipe core. And the frustum measuring section is provided with scale marks of which the numerical values are gradually increased along the outer diameter increasing direction. The utility model aims to overcome the defects of low detection efficiency and high missed detection probability of the existing aluminum foil straight tube core inner diameter detection tool, can quickly and accurately detect whether the tube core to be detected has negative inner diameter deviation or not, can also quickly and accurately detect whether the tube core to be detected has positive inner diameter deviation or not, and is simple, quick, convenient to operate and high in detection efficiency. And the detection efficiency is greatly improved while whether the to-be-detected tube core meets the use standard requirement or not is quickly judged.

Description

Technical Field

[0001] This application relates to the field of measurement technology, and in particular to a device for detecting the inner diameter of a tube core. Background Technology

[0002] If the straight tube core or straight sleeve material used for the inner ring support of aluminum foil rolls is deformed, or if its size is too large or too small, it will cause the aluminum foil to break or other quality problems during winding. Therefore, each aluminum foil straight tube core needs to be measured. Due to the large number of aluminum foil straight tube cores used, the traditional method of using vernier calipers to inspect each straight tube core is extremely inefficient. Moreover, since vernier calipers measure point values, they can only measure and display the inner diameter value at one point on the circumference. Although it is possible to move and measure multiple points, it is still impossible to measure the deviation or deformation of the pipe's inner diameter in all ranges at the same time, resulting in a very high probability of missed detection. This undoubtedly seriously affects the production and quality of aluminum foil.

[0003] Currently, some devices in the field use a combination of springs, rollers, and measuring sensors to measure the inner diameter of pipes. However, such devices are relatively complex and can only measure and display the inner diameter value at a single point on the circumference. They cannot simultaneously measure the deviation or deformation of the inner diameter of the straight pipe core, nor can they intuitively reflect the overall inner diameter conformity, resulting in a high probability of missed detections. Summary of the Invention

[0004] Therefore, the purpose of this invention is to overcome the shortcomings of existing aluminum foil straight tube core inner diameter testing tools, which suffer from low testing efficiency and a high probability of missed detections, and to provide a tube core inner diameter testing device. This invention can quickly and accurately check whether the tube core under test has a negative inner diameter deviation, and also quickly and accurately check whether the tube core under test has a positive inner diameter deviation. It is simple, fast, and easy to operate, and while quickly determining whether the tube core under test meets the usage standard requirements, it also greatly improves testing efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A device for detecting the inner diameter of a tube core includes a straight tube measuring section, a frustum measuring section whose top surface is connected to the straight tube measuring section, and an end ring that is detachably inserted into the straight tube measuring section. The outer diameter of the straight tube measuring section is smaller than the inner diameter of the tube core to be tested, and the frustum measuring section has scale lines with gradually increasing values ​​along the direction of increasing outer diameter.

[0007] When using this utility model for testing, firstly, insert one end of the test die along the straight pipe measuring section. During insertion, allow the die to slide down naturally. If the die gets stuck at a certain depth, and even after slight manual shaking, it still cannot slide down, or the die cannot fall entirely into the straight pipe measuring section, it indicates that a section of the die's inner diameter is too small, exceeding the negative deviation standard, and is therefore deemed unqualified. Secondly, once the die can fall smoothly and normally into the straight pipe measuring section, if it continues to slide down to a certain scale line on the frustum measuring section, place the alignment ring onto the die and allow it to slide down naturally until one end of the alignment ring is reached. Insert the tube into the straight pipe measuring section. At this time, the alignment ring is located between the straight pipe measuring section and the tube core to be tested, so that the alignment ring is fully inserted into one end of the straight pipe measuring section. If the tube core to be tested is off-axis, it will be corrected by the alignment ring to be coaxial with the straight pipe measuring section. Then, based on the diameter value corresponding to the scale line at this time, the maximum inner diameter value of this end of the tube core to be tested can be determined. After that, take out the tube core to be tested, invert it 180 degrees, and insert it again in the above manner to test it again, and detect the maximum inner diameter value of the other end of the tube core to be tested. Finally, determine whether the inner diameter values ​​of the two ends exceed the tolerance standard of the inner diameter value of the tube core to be tested.

[0008] This utility model employs a two-section structure consisting of a straight pipe measuring section and a truncated cone measuring section. It uses an end-positive ring to adjust the centering degree of the pipe diameter to be tested. This allows for quick and accurate checking of both negative and positive inner diameter deviations in the pipe core under test. It is simple, fast, and easy to operate. While quickly determining whether the pipe core under test meets the usage standard requirements, it also greatly improves the testing efficiency.

[0009] Furthermore, the negative deviation between the outer diameter of the straight tube measuring section and the inner diameter of the core to be tested is 1.5 mm. According to the standard for using aluminum foil cores, when the positive and negative deviation of the core to be tested is within ±1.5 mm, it can continue to be used; if it exceeds this deviation value, it cannot proceed to the next process, thus ensuring the effectiveness of production and the quality of the product.

[0010] Furthermore, the length of the straight tube measuring section is greater than the maximum length of the core to be tested.

[0011] Furthermore, a guide head is provided at the top of the straight tube measuring section. The guide head facilitates the insertion of the test tube core, improving usage and measurement efficiency.

[0012] Furthermore, the length of the scale line area of ​​the truncated cone measuring section is 10cm, and the scale line division value is 1mm.

[0013] Furthermore, the slope angle of the truncated cone measuring section is 1.7°.

[0014] In order to accurately reflect the change in inner diameter after the test tube core falls into the truncated cone measuring section, a reasonable slope angle is set to accurately convert the slope length into the diameter change value. The length of the scale line area is 10cm, and the scale line division value is 1mm, which enables the operator to quickly read the value.

[0015] Furthermore, the positive deviation between the maximum outer diameter and the inner diameter of the test core at the scale line area of ​​the truncated cone measuring section is 1.5 mm. According to the usage standard for aluminum foil cores, when the positive and negative deviation of the test core is within ±1.5 mm, it can continue to be used; if the deviation exceeds this value, it cannot proceed to the next process, thus ensuring the effectiveness of production and the quality of the product.

[0016] Furthermore, the end-aligning ring includes an annular body and a plurality of end-aligning claws disposed on one side of the annular body and evenly distributed around the circumference.

[0017] Furthermore, the end-aligning claw is a tapered, plate-shaped arc block. The side of the end-aligning claw that contacts the straight tube measuring section is a vertical surface, and the side of the end-aligning claw that contacts the tube core to be tested is an inclined surface.

[0018] The alignment jaws can be inserted into the gap between the test die and the straight tube measurement section, thereby correcting the offset when the test die is inserted and improving the accuracy of data reading when the truncated cone measurement section is used. The separate alignment jaws have limited friction after being inserted into the gap between the two, making it easier to remove them.

[0019] Furthermore, the bottom surface of the truncated cone measuring section is also provided with a base.

[0020] Furthermore, the base is a flat base with a certain floor area, and the truncated cone measuring section is located at the center of the base.

[0021] Setting up a base provides greater stability. Since the bottom area of ​​the truncated cone measuring section is limited, the stabilizing force it can generate is also limited. When the length of the test tube is too long, it is easy to tip over. Setting up a base can improve the stability of use.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This utility model employs a two-section structure consisting of a straight pipe measuring section and a truncated cone measuring section. It uses an end-positive ring to adjust the centering degree of the pipe diameter to be tested. This allows for quick and accurate checking of both negative and positive inner diameter deviations in the pipe core under test. It is simple, fast, and easy to operate. While quickly determining whether the pipe core under test meets the usage standard requirements, it also greatly improves the testing efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure in one embodiment;

[0025] Figure 2 This is an application illustration in one embodiment;

[0026] Figure 3 for Figure 2 A partial schematic diagram of point A in the middle.

[0027] 1-Straight pipe measuring section, 11-Guide head, 2-Frustum measuring section, 21-Scale line, 3-End positive ring, 31-Annular body, 32-End positive claw, 10-Test tube core. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] Example 1

[0032] like Figures 1 to 3 The first embodiment shown is a core inner diameter detection device, which includes a straight pipe measuring section 1, a frustum measuring section 2 whose top surface is connected to the straight pipe measuring section 1, and an end ring 3 that is detachably inserted into the straight pipe measuring section 1. The outer diameter of the straight pipe measuring section 1 is smaller than the inner diameter of the core 10 to be tested. The frustum measuring section 2 is provided with scale lines 21 whose values ​​gradually increase along the direction of increasing outer diameter.

[0033] In this embodiment, the negative deviation between the outer diameter of the straight tube measuring section 1 and the inner diameter of the core 10 to be tested is 1.5 mm. According to the standard for using aluminum foil cores, when the positive and negative deviation of the core 10 to be tested is within ±1.5 mm, it can continue to be used; if the deviation exceeds this value, it cannot proceed to the next process, thus ensuring the effectiveness of production and the quality of the product.

[0034] In this embodiment, the length of the straight tube measurement section 1 is greater than the maximum length of the core tube 10 to be tested.

[0035] like Figure 1 and Figure 2 As shown, a guide head 11 is also provided at the top of the straight tube measuring section 1. The guide head 11 facilitates the insertion of the tube core 10 to be tested, improving the efficiency of use and measurement.

[0036] In this embodiment, the length of the scale line 21 area of ​​the truncated cone measuring section 2 is 10cm, and the scale division value of the scale line 21 is 1mm.

[0037] In this embodiment, the slope angle of the truncated cone measuring section 2 is 1.7°.

[0038] In order to accurately reflect the change in inner diameter after the test core 10 falls into the cone-shaped measuring section 2, a reasonable slope angle is set to accurately convert the slope length into the diameter change value. The length of the scale line 21 area is 10cm, and the scale division value of the scale line 21 is 1mm, which enables the operator to quickly read the value.

[0039] In this embodiment, the positive deviation between the maximum outer diameter and the inner diameter of the core 10 to be tested at the scale line 21 area of ​​the cone-shaped measuring section 2 is 1.5 mm. According to the standard for using aluminum foil cores, when the positive and negative deviation of the core 10 to be tested is within ±1.5 mm, it can continue to be used; if the deviation exceeds this value, it cannot proceed to the next process, thus ensuring the effectiveness of production and the quality of the product.

[0040] The operating principle of this embodiment is as follows: During testing, firstly, insert one end of the test die 10 along the straight tube measuring section 1. Allow the test die 10 to slide down naturally. If it gets stuck at a certain depth, and if it still cannot slide down after slight manual shaking, or if the entire length of the test die 10 cannot fall into the straight tube measuring section 1, it indicates that a section of the inner diameter of the test die 10 is too small, exceeding the negative deviation standard, and is therefore deemed unqualified. Secondly, once the test die 10 can fall smoothly and normally into the straight tube measuring section 1, if it continues to slide down to a certain scale line 21 on the frustum measuring section 2, fit the alignment ring 3 onto the test die 10 and allow it to slide down naturally until it is aligned. One end of ring 3 is inserted into the straight pipe measuring section 1. At this time, the alignment ring 3 is located between the straight pipe measuring section 1 and the test core 10, so that the alignment ring 3 is completely inserted into one end of the straight pipe measuring section 1. If the test core 10 deviates from the central axis, it will be corrected by the alignment ring 3 to be coaxial with the straight pipe measuring section 1. Then, according to the diameter value corresponding to the scale line 21 at this time, the maximum inner diameter value of this end of the test core 10 can be determined. After that, the test core 10 is taken out, inverted 180 degrees, and then inserted and tested again in the above manner to detect the maximum inner diameter value of the other end of the test core 10. Finally, the results of the inner diameter values ​​at both ends are used to determine whether the tolerance of the inner diameter value of the test core 10 is exceeded.

[0041] The advantage of this embodiment is that it uses a two-section structure of straight pipe measuring section 1 and truncated cone measuring section 2 in combination, and uses end ring 3 to adjust the centering degree of the pipe diameter to be tested. It can quickly and accurately check whether the pipe core 10 to be tested has a negative inner diameter deviation, and it can also quickly and accurately check whether the pipe core 10 to be tested has a positive inner diameter deviation. It is simple, fast and convenient to operate. While quickly determining whether the pipe core 10 to be tested meets the use standard requirements, it also greatly improves the detection efficiency.

[0042] Example 2

[0043] This embodiment is similar to Embodiment 1, except that in this embodiment:

[0044] like Figure 1 and Figure 3 As shown, the end-aligning ring 3 includes an annular body 31 and a plurality of end-aligning claws 32 disposed on one side of the annular body 31 and evenly distributed around the circumference.

[0045] In this embodiment, the number of straightening claws 32 is three and they are evenly distributed in a circle.

[0046] In this embodiment, the straightening claw 32 is a tapered, plate-shaped arc block. The side of the straightening claw 32 that contacts the straight tube measuring section 1 is a vertical surface, and the side of the straightening claw 32 that contacts the core tube 10 to be tested is an inclined surface.

[0047] In this embodiment, the inclination of the side of the straightening claw 32 that contacts the die 10 under test is 15°.

[0048] The alignment claw 32 can be inserted into the gap between the test core 10 and the straight tube measuring section 1, thereby correcting the offset when the test core 10 is inserted and improving the accuracy of data reading when the frustum measuring section 2 is read. The separate alignment claw 32 has limited friction after being inserted into the gap between the two, making it easier to remove.

[0049] The operating principle of this embodiment is as follows: During testing, firstly, insert one end of the test die 10 along the straight tube measuring section 1. Allow the test die 10 to slide down naturally. If it gets stuck at a certain depth, and if it still cannot slide down after slight manual shaking, or if the entire length of the test die 10 cannot fall into the straight tube measuring section 1, it indicates that a section of the inner diameter of the test die 10 is too small, exceeding the negative deviation standard, and is therefore deemed unqualified. Secondly, once the test die 10 can fall smoothly and normally into the straight tube measuring section 1, if it continues to slide down to a certain scale line 21 on the frustum measuring section 2, fit the alignment ring 3 onto the test die 10 and allow it to slide down naturally until it is aligned. One end of ring 3 is inserted into the straight pipe measuring section 1. At this time, the alignment ring 3 is located between the straight pipe measuring section 1 and the test core 10, so that the alignment ring 3 is completely inserted into one end of the straight pipe measuring section 1. If the test core 10 deviates from the central axis, it will be corrected by the alignment ring 3 to be coaxial with the straight pipe measuring section 1. Then, according to the diameter value corresponding to the scale line 21 at this time, the maximum inner diameter value of this end of the test core 10 can be determined. After that, the test core 10 is taken out, inverted 180 degrees, and then inserted and tested again in the above manner to detect the maximum inner diameter value of the other end of the test core 10. Finally, the results of the inner diameter values ​​at both ends are used to determine whether the tolerance of the inner diameter value of the test core 10 is exceeded.

[0050] The advantage of this embodiment is that it uses a two-section structure of straight pipe measuring section 1 and truncated cone measuring section 2 in combination, and uses end ring 3 to adjust the centering degree of the pipe diameter to be tested. It can quickly and accurately check whether the pipe core 10 to be tested has a negative inner diameter deviation, and it can also quickly and accurately check whether the pipe core 10 to be tested has a positive inner diameter deviation. It is simple, fast and convenient to operate. While quickly determining whether the pipe core 10 to be tested meets the use standard requirements, it also greatly improves the detection efficiency.

[0051] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0052] Example 3

[0053] This embodiment is similar to Embodiment 1, except that in this embodiment:

[0054] like Figure 1 and Figure 2 As shown, the bottom surface of the cone-shaped measuring section 2 is also equipped with a base.

[0055] In this embodiment, the base is a flat base with a certain floor area, and the truncated cone measuring section 2 is located at the center of the base.

[0056] Setting a base provides greater stability. Since the bottom area of ​​the truncated cone measuring section 2 is limited, the stabilizing force it can generate is also limited. When the length of the test core 10 is too long, it is easy to tip over. Setting a base can improve the stability of use.

[0057] The advantage of this embodiment is that it uses a two-section structure of straight pipe measuring section 1 and truncated cone measuring section 2 in combination, and uses end ring 3 to adjust the centering degree of the pipe diameter to be tested. It can quickly and accurately check whether the pipe core 10 to be tested has a negative inner diameter deviation, and it can also quickly and accurately check whether the pipe core 10 to be tested has a positive inner diameter deviation. It is simple, fast and convenient to operate. While quickly determining whether the pipe core 10 to be tested meets the use standard requirements, it also greatly improves the detection efficiency.

[0058] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for detecting the inner diameter of a tube core, characterized in that, It includes a straight pipe measuring section (1), a frustum measuring section (2) whose top surface is connected to the straight pipe measuring section (1), and an end ring (3) that can be detachably inserted into the straight pipe measuring section (1). The outer diameter of the straight pipe measuring section (1) is smaller than the inner diameter of the core (10) to be tested. The frustum measuring section (2) has scale lines (21) with gradually increasing values ​​along the direction of increasing outer diameter.

2. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The negative deviation between the outer diameter of the straight pipe measuring section (1) and the inner diameter of the core (10) to be tested is 1.5 mm.

3. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The length of the straight pipe measuring section (1) is greater than the maximum length of the core tube (10) to be tested.

4. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The top of the straight pipe measuring section (1) is also provided with a guide head (11).

5. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The length of the scale line (21) area of ​​the truncated cone measuring section (2) is 10cm, and the scale line (21) has a division value of 1mm.

6. The device for detecting the inner diameter of a tube core according to claim 5, characterized in that, The slope angle of the truncated cone measuring section (2) is 1.7°.

7. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The positive deviation between the maximum outer diameter and the inner diameter of the core (10) under test at the scale line (21) area of ​​the cone measuring section (2) is 1.5 mm.

8. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The end ring (3) includes an annular body (31) and a plurality of end claws (32) disposed on one side of the annular body (31) and evenly distributed around the circumference.

9. The device for detecting the inner diameter of a tube core according to claim 8, characterized in that, The end-aligning claw (32) is a tapered, plate-shaped arc block. The side of the end-aligning claw (32) that contacts the straight tube measuring section (1) is a vertical surface, and the side of the end-aligning claw (32) that contacts the core (10) to be tested is an inclined surface.

10. The device for detecting the inner diameter of a tube core according to claim 1, characterized in that, The bottom surface of the truncated cone measuring section (2) is also provided with a base.

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