A curved caliper type adapter measuring scale

Abstract

The application discloses a kind of adapter measuring scale of bending card ruler shape, belongs to YBC coordinate design measurement and duct numerical control bending forming technical field, solve the long trial-and-error period of duct measurement in prior art, process is complex, the complex structure of existing YBC ruler, the problem of relatively high cost.The adapter measuring scale, first ruler and second ruler are rotatably connected and the relative position can be fixed, first ruler is arranged along the axial direction of first straight pipe section, and second ruler is arranged along the axial direction of second straight pipe section;Third ruler and fourth ruler are rotatably connected and the relative position can be fixed, third ruler is arranged along the axial direction of second straight pipe section, and fourth ruler is arranged along the axial direction of third straight pipe section;One end of fixed arc ruler and one end of fixed arc ruler are slidably connected and the relative position can be fixed, fixed arc ruler and fixed arc ruler form circular arc, the other end of fixed arc ruler is fixedly connected with third ruler, and the other end of sliding arc ruler is fixedly connected with second ruler.The application can be used for the YBC parameter measurement of bending duct.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of YBC coordinate design measurement and catheter numerical control bending forming, and particularly relates to a bent caliper-shaped adapter measuring scale. BACKGROUND

[0002] At present, in the field of catheter measurement and bending forming technology, the quality control of the positions of two ends is generally carried out by trial fitting tooling. In the production of catheter bending, the measurement and feedback of deviation values determine the number of bending adjustments and the output precision of the final product. The measurement method and the precision of the measurement tool have a great influence on the deviation values. Moreover, after the product assembly and the installation conditions of the catheter are met, the sampling of the catheter is carried out, and the qualification of the catheter can be finally judged. Therefore, the general manufacturing process of the catheter includes bending manufacturing, assembly, sampling adjustment of the catheter, re-bending and re-adjustment, and other complex processes, which require a large amount of trial and error time period, waiting, coordination and repeated iteration.

[0003] The use of trial fitting tooling is a common means to control the quality of part processing, but the trial fitting tooling does not include the size detection and data feedback function of the catheter product, and the production cycle is long and the cost is high. In aerospace products, the precision requirement of the catheter is extremely strict, and the bending angle, the length of the straight section and the angle of the pipe rotation surface affect the requirements of the gap between the positions of the two pipe openings, the intermediate fixed position and the cabin wall.

[0004] The existing YBC scale has a complex structure and high cost, and the support fixed type measuring scale used in the automobile industry cannot meet the precision requirements of aerospace products. SUMMARY

[0005] In view of the above analysis, the present application aims to provide a bent caliper-shaped adapter measuring scale, which solves the problems of long trial and error cycle, complex process, complex structure of the existing YBC scale and high cost in the prior art.

[0006] The main purpose of the present application is achieved by the following technical solutions:

[0007] The application provides a curved caliper-shaped adapter measuring scale for measuring YBC parameters of a curved pipe, the curved pipe comprising a first straight pipe section, a first elbow pipe section, a second straight pipe section, a second elbow pipe section and a third straight pipe section connected in sequence; the adapter measuring scale comprising a first ruler, a second ruler, a third ruler, a fourth ruler, a fixed arc ruler and a sliding arc ruler; the first ruler and the second ruler are rotationally connected and the relative position thereof can be fixed, the first ruler is arranged along the axial direction of the first straight pipe section and the side surface of the first ruler is attached to the first straight pipe section, and the second ruler is arranged along the axial direction of the second straight pipe section and the side surface of the second ruler is attached to the second straight pipe section; the third ruler and the fourth ruler are rotationally connected and the relative position thereof can be fixed, the third ruler is arranged along the axial direction of the second straight pipe section and the side surface of the third ruler is attached to the side surface of the second straight pipe section, and the fourth ruler is arranged along the axial direction of the third straight pipe section and the side surface of the fourth ruler is attached to the side surface of the third straight pipe section; one end of the fixed arc ruler is slidably connected to one end of the fixed arc ruler and the relative position thereof can be fixed, the fixed arc ruler and the fixed arc ruler form a circular arc, the other end of the fixed arc ruler is fixedly connected to the third ruler, and the other end of the sliding arc ruler is fixedly connected to the second ruler.

[0008] Further, the fixed arc ruler is provided with a ring-shaped guide groove in the circumferential direction, and the sliding arc ruler is inserted into the ring-shaped guide groove.

[0009] Further, the curved caliper-shaped adapter measuring scale further comprises a guide block and a positioning rod, the guide block is located at the slot opening of the ring-shaped guide groove and is fixedly connected to the fixed arc ruler, and the positioning rod is in abutment with the sliding arc ruler after penetrating through the guide block.

[0010] Further, the curved caliper-shaped adapter measuring scale further comprises a pressing block, the pressing block is located at the slot opening of the ring-shaped guide groove and is fixedly connected to the fixed arc ruler, and the pressing block is in abutment with the sliding arc ruler.

[0011] Further, the first ruler, the second ruler, the third ruler and the fourth ruler each comprise a ruler body, a blind hole is formed in the ruler body, and a through hole is formed in the hole bottom of the blind hole.

[0012] Further, the blind hole on the first ruler and the blind hole on the second ruler are oriented to the same side; or, the blind hole on the first ruler and the blind hole on the second ruler are oppositely arranged; or, the blind hole on the first ruler and the blind hole on the second ruler are oppositely arranged.

[0013] Further, the blind hole on the third ruler and the blind hole on the fourth ruler are oriented to the same side; or, the blind hole on the third ruler and the blind hole on the fourth ruler are oppositely arranged; or, the blind hole on the third ruler and the blind hole on the fourth ruler are oppositely arranged.

[0014] Further, the adapter measuring scale in the shape of a bending caliper further comprises a first fixing member, and a first fixing screw and a first fixing nut matched with each other, the first fixing screw is detachably fixedly connected with the first fixing nut after penetrating through the first fixing member, the first ruler and the second ruler; the adapter measuring scale in the shape of a bending caliper further comprises a second fixing member, and a second fixing screw and a second fixing nut matched with each other, the second fixing screw is detachably fixedly connected with the second fixing nut after penetrating through the second fixing member, the third ruler and the fourth ruler.

[0015] Further, the first fixing member is located in the blind hole of the first ruler and matched with the blind hole on the first ruler; and / or, the first fixing member is located in the blind hole of the second ruler and matched with the blind hole on the second ruler.

[0016] Further, the second fixing member is located in the blind hole of the third ruler and matched with the blind hole on the third ruler; and / or, the second fixing member is located in the blind hole of the fourth ruler and matched with the blind hole of the fourth ruler.

[0017] Compared with the prior art, the adapter measuring scale in the shape of a bending caliper provided by the application can at least realize one of the following beneficial effects:

[0018] The adapter measuring scale in the shape of a bending caliper provided by the application can replace the existing bending manufacturing inspection fixture, and can accurately measure the YBC parameter under the condition that the three-dimensional measurement scanning technology is not available, can reduce the difficulty and workload of the bending manufacturing, measurement and feedback, and revision procedures, reduces the repeated sampling work caused by subjective judgment, greatly accelerates the speed of the optimization and production of the catheter, helps to ensure the production progress, and has the characteristics of simple operation, easy implementation, low cost, convenient and fast use, accurate measurement and the like.

[0019] Other features and advantages of the application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings: BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure schematic view of the adapter measuring scale in the shape of a bending caliper provided by the embodiment one of the application;

[0023] Figure 2a The structure schematic view of the second ruler of the adapter measuring scale in the shape of a bending caliper provided by the embodiment one of the application;

[0024] Figure 2b The assembly schematic diagram of the first straight ruler and the second straight ruler of the bent caliper shape conversion measurement ruler provided in the embodiment one of the present application is shown in Figure 1.

[0025] Figure 3 The connection structure schematic diagram of the sliding arc ruler and the fixed arc ruler in the bent caliper shape conversion measurement ruler provided in the embodiment one of the present application is shown in Figure 2.

[0026] Figure 4 The length position schematic diagram of the actual measurement in the bent caliper shape conversion measurement ruler provided in the embodiment one of the present application is shown in Figure 3.

[0027] Figure 5 The length position schematic diagram of the actual parameter Y in the bent caliper shape conversion measurement ruler provided in the embodiment one of the present application is shown in Figure 4.

[0028] Reference signs:

[0029] 1 - first straight ruler; 2 - second straight ruler; 3 - third straight ruler; 4 - fourth straight ruler; 5 - curved conduit; 6 - fixed arc ruler; 7 - sliding arc ruler; 8 - guide block; 9 - positioning rod; 10 - pressing block; 11 - blind hole; 12 - through hole; 13 - first fixing member; 14 - first fixing screw; 15 - first connecting ruler plate; 16 - first end fixing block; 17 - first end screw; 18 - second end fixing block; 19 - second end screw; 20 - second connecting ruler plate; 21 - third end fixing block; 22 - third end screw; 23 - fourth end fixing block; 24 - fourth end screw; 25 - U-shaped clamp. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application are specifically described below in combination with the drawings, wherein the drawings form a part of the present application and are used to explain the principles of the embodiments of the present application.

[0031] Embodiment one

[0032] The present embodiment provides a bent caliper shape conversion measurement ruler for measuring YBC parameter of a curved conduit 5, as shown in Figure 1, which comprises a first straight ruler 1, a second straight ruler 2, a third straight ruler 3, a fourth straight ruler 4, a fixed arc ruler 6 and a sliding arc ruler 7. Figures 1 to 3 The curved conduit 5 comprises a first straight pipe segment, a first elbow pipe segment, a second straight pipe segment, a second elbow pipe segment and a third straight pipe segment connected in sequence.

[0033] The first ruler 1 and the second ruler 2 are rotationally connected and the relative positions can be fixed. The first ruler 1 is arranged along the axial direction of the first straight pipe section and the side surface of the first ruler 1 is attached to the first straight pipe section. The second ruler 2 is arranged along the axial direction of the second straight pipe section and the side surface of the second ruler 2 is attached to the second straight pipe section. By measuring the angle between the first ruler 1 and the second ruler 2, the bending angle (i.e. the parameter C1) of the first straight pipe section and the second straight pipe section can be obtained.

[0034] The third ruler 3 and the fourth ruler 4 are rotationally connected and the relative positions can be fixed. The third ruler 3 is arranged along the axial direction of the second straight pipe section and the side surface of the third ruler 3 is attached to the side surface of the second straight pipe section. The fourth ruler 4 is arranged along the axial direction of the third straight pipe section and the side surface of the fourth ruler 4 is attached to the side surface of the third straight pipe section. By measuring the angle between the third ruler 3 and the fourth ruler 4, the bending angle (i.e. the parameter C2) of the second straight pipe section and the third straight pipe section can be obtained.

[0035] One end of the fixed arc ruler 6 and one end of the sliding arc ruler 7 are slidingly connected and the relative positions can be fixed. Both of them form a circular arc shape. The other end of the fixed arc ruler 6 is fixedly connected to the third ruler 3. The other end of the sliding arc ruler 7 is fixedly connected to the second ruler 2. By the angle of the circular arc shape finally formed by the fixed arc ruler 6 and the sliding arc ruler 7, the included angle (i.e. the parameter B) between the plane formed by the first ruler 1 and the second ruler 2 and the plane formed by the third ruler 3 and the fourth ruler 4 can be obtained.

[0036] When measuring, the measuring method comprises the following steps:

[0037] Step 1: providing a catheter;

[0038] Step 2: preliminarily positioning the first ruler 1 and the first straight pipe section, preliminarily positioning the second ruler 2 and the second straight pipe section, preliminarily positioning the third ruler 3 and the second straight pipe section, and preliminarily positioning the fourth ruler 4 and the third straight pipe section;

[0039] Step 3: adjusting the attachment gap between the first ruler 1 and the first straight pipe section, so that the first ruler 1 is arranged along the axial direction of the first straight pipe section and located in the same plane;

[0040] Adjusting the attachment gap between the second ruler 2 and the second straight pipe section, so that the second ruler 2 is arranged along the axial direction of the second straight pipe section and located in the same plane;

[0041] Adjusting the attachment gap between the third ruler 3 and the second straight pipe section, so that the third ruler 3 is arranged along the axial direction of the second straight pipe section and located in the same plane;

[0042] Adjusting the attachment gap between the fourth ruler 4 and the third straight pipe section, so that the fourth ruler 4 is arranged along the axial direction of the third straight pipe section and located in the same plane;

[0043] Step 4: Measure the angle between the first straight ruler 1 and the second straight ruler 2, and the bending angle of the first straight pipe segment and the second straight pipe segment (i.e. parameter C1) can be obtained;

[0044] Measure the angle between the third straight ruler 3 and the fourth straight ruler 4, and the bending angle of the second straight pipe segment and the third straight pipe segment (i.e. parameter C2) can be obtained;

[0045] Measure the angle of the circular arc formed by the fixed arc ruler 6 and the sliding arc ruler 7, and the included angle between the plane formed by the first straight ruler 1 and the second straight ruler 2 and the plane formed by the third straight ruler 3 and the fourth straight ruler 4 (i.e. parameter B) can be obtained;

[0046] Measure the vertical distance L1 of the first straight pipe segment away from the intersection point of the first straight ruler 1 and the second straight ruler 2 to the end of the first straight pipe segment, calculate the length Y1 of the first straight pipe segment, measure the vertical distance L2 of the intersection point of the first straight ruler 1 and the second straight ruler 2 to the intersection point of the third straight ruler 3 and the fourth straight ruler 4, calculate the length Y2 of the second straight pipe segment, measure the vertical distance L3 of the intersection point of the third straight ruler 3 and the fourth straight ruler 4 to the end of the third straight pipe segment away from the second straight pipe segment, calculate the length Y3 of the third straight pipe segment, see Figures 4 to 5 .

[0047] Specifically, the length Y1 of the first straight pipe segment is calculated by the following formula:

[0048] Y1 = L1 - ΔL1;

[0049] ΔL1 = R1 tan(0.5C1);

[0050] Wherein, Y1 is the length of the first straight pipe segment, mm; L1 is the vertical distance of the first straight pipe segment away from the intersection point of the first straight ruler 1 and the second straight ruler 2 to the end of the first straight pipe segment, mm; R1 is the outer circular arc radius of the first straight pipe segment, mm; C1 is the circular arc angle of the outer circular arc of the first straight pipe segment, °.

[0051] The length Y2 of the second straight pipe segment is calculated by the following formula:

[0052] Y2 = L2 - ΔL1 - ΔL2

[0053] ΔL1 = R1 tan(0.5C1);

[0054] ΔL2 = R2 tan(0.5C2);

[0055] Y2=L2-R1tan(0.5C1)

[0056] Y3=L3-ΔL2

[0057] Y3=L3-ΔL2

[0058] ΔL2=R2tan(0.5C2)

[0059] Y2=L2-R1tan(0.5C1)

[0060] Need to be explained, in practical application, usually R1=R2.

[0061] Compared with the prior art, the adapter measuring ruler in the shape of a bending caliper provided by the embodiment can replace the existing bending manufacturing inspection fixture, and can accurately measure the YBC parameter under the condition that the three-dimensional measurement scanning technology is not available, can reduce the difficulty and workload of the bending manufacturing, measurement and feedback, and revision procedures, reduces the repeated work caused by subjective judgment, greatly speeds up the optimization of the catheter and the production speed, helps to ensure the production schedule, and has the characteristics of simple operation, easy implementation, low cost, convenient and fast use, accurate measurement and the like.

[0062] Need to be explained, on the one hand, the parameter Y refers to the length of the first straight pipe segment, the second straight pipe segment and the third straight pipe segment, which can be measured by using a conventional length measuring tool, for example, a ruler. Alternatively, a scale line can be arranged on the first ruler 1, the second ruler 2, the third ruler 3 and / or the fourth ruler 4 for directly measuring the length of the first straight pipe segment, the second straight pipe segment and the third straight pipe segment.

[0063] On the other hand, the measurement of the actual angles of the parameters C1 and C2 can be performed by using a conventional angle ruler, an electronic angle measuring instrument or a vernier angle measuring tool, which will not be described in detail here.

[0064] In still another aspect, the measurement of the actual angle of the parameter B can be performed by using a conventional angle ruler, an electronic angle measuring instrument or a vernier angle measuring tool. Alternatively, a scale or an angle vernier can be provided on the fixed arc ruler 6 and / or the sliding arc ruler 7 to directly measure the included angle between the plane formed by the first straight ruler 1 and the second straight ruler 2 and the plane formed by the third straight ruler 3 and the fourth straight ruler 4.

[0065] For the connection between the fixed arc ruler 6 and the sliding arc ruler 7, the scale body of the fixed arc ruler 6 is a plate bent into an arc shape, the scale body of the sliding arc ruler 7 is also a plate bent into an arc shape, the fixed arc ruler 6 is provided with a ring-shaped guide groove in the circumferential direction, the radial cross-sectional shape of the ring-shaped guide groove is a rectangle, the groove depth of the ring-shaped guide groove is equal to the thickness of the sliding arc ruler 7, and the sliding arc ruler 7 is inserted into the ring-shaped guide groove, so that the two are assembled together without shaking left and right and can freely slide.

[0066] In order to improve the accuracy of measurement and avoid relative sliding between the sliding arc ruler 7 and the fixed arc ruler 6 during measurement, the above-mentioned bending caliper-shaped adapter measuring ruler further comprises a guide block 8 and a positioning rod 9. The guide block 8 is located at the slot opening of the ring-shaped guide groove and is fixedly connected with the fixed arc ruler 6. The positioning rod 9 is in abutment with the sliding arc ruler 7 after passing through the guide block 8, so that the sliding arc ruler 7 and the fixed arc ruler 6 can be positioned during measurement without sliding; and / or the above-mentioned bending caliper-shaped adapter measuring ruler further comprises a pressing block 10. The pressing block 10 is located at the slot opening of the ring-shaped guide groove and is fixedly connected with the fixed arc ruler 6. The pressing block 10 is in abutment with the sliding arc ruler 7.

[0067] Specifically, the structures of the first straight ruler 1, the second straight ruler 2, the third straight ruler 3 and the fourth straight ruler 4 are basically the same, comprising a scale body. A blind hole 11 is provided on the scale body, and a through hole 12 is provided at the bottom of the blind hole 11, so that a stepped inner wall can be formed on the scale body. The two ends of the scale body are semicircular, and the radius of the semicircle is half of the width of the scale body. The shapes of the two ends of the blind hole 11 and the two ends of the through hole 12 can be semicircular or square.

[0068] It should be noted that in actual application, the blind hole on the first straight ruler 1 and the blind hole 11 on the second straight ruler 2 can be directed to the same side, or can be oppositely arranged or oppositely arranged. Similarly, the blind hole on the third straight ruler 3 and the blind hole on the fourth straight ruler 4 can be directed to the same side, or can be oppositely arranged or oppositely arranged.

[0069] In order to realize the connection between the first ruler 1 and the second ruler 2, the above-mentioned curved caliper-shaped adapter measuring ruler further comprises a first fixing piece 13 and a first fixing screw and a first fixing nut matched with each other, the first fixing screw is detachably fixedly connected with the first fixing nut after penetrating through the first fixing piece 13, the first ruler 1 and the second ruler 2, in order to reduce the shaking between the first ruler 1 and the second ruler 2, the first fixing piece 13 is located in the blind hole of the first ruler 1 and / or the first fixing piece 13 is located in the blind hole 11 of the second ruler 2, the first fixing piece 13 is matched with the blind hole of the first ruler 1 and / or the blind hole 11 of the second ruler 2, so as to ensure that the angle of the first ruler 1 and the second ruler 2 is stable after the first fixing screw is tightened and is not easily deformed.

[0070] In order to realize the connection between the third ruler 3 and the fourth ruler 4, the above-mentioned curved caliper-shaped adapter measuring ruler further comprises a second fixing piece and a second fixing screw and a second fixing nut matched with each other, the second fixing screw is detachably fixedly connected with the second fixing nut after penetrating through the second fixing piece, the third ruler 3 and the fourth ruler 4, in order to reduce the shaking between the third ruler 3 and the fourth ruler 4, the second fixing piece is located in the blind hole of the third ruler 3 and / or the second fixing piece is located in the blind hole of the fourth ruler 4, the second fixing piece is matched with the blind hole of the third ruler 3 and / or the blind hole of the fourth ruler 4.

[0071] It should be noted that the first fixing piece 13 is one, which can be located in one of the blind hole of the first ruler 1 and the blind hole 11 of the second ruler 2, or the number of the first fixing piece 13 is two, one of which is located in the blind hole of the first ruler 1, and the other is located in the blind hole 11 of the second ruler 2.

[0072] Similarly, the second fixing piece is one, which can be located in one of the blind hole of the third ruler 3 and the blind hole of the fourth ruler 4, or the number of the second fixing piece is two, one of which is located in the blind hole of the third ruler 3, and the other is located in the blind hole of the fourth ruler 4.

[0073] Exemplarily, the first fixing piece 13 and the second fixing piece are both sheet materials, the width of the first fixing piece 13 is equal to the width of the blind hole on the first ruler 1 and / or the second ruler 2, the thickness of the first fixing piece 13 is equal to the depth of the blind hole on the first ruler 1 and / or the second ruler 2, the width of the second fixing piece is equal to the width of the blind hole on the third ruler 3 and / or the fourth ruler 4, and the thickness of the second fixing piece is equal to the depth of the blind hole on the third ruler 3 and / or the fourth ruler 4.

[0074] In order to realize the stable connection between the second ruler 2 and the sliding arc ruler 7, the above-mentioned curved caliper-shaped adapter measuring ruler further comprises a first connecting ruler plate 15, one end of the first connecting ruler plate 15 is connected with the second ruler 2, and the other end of the first connecting ruler plate 15 is connected with the sliding arc ruler 7.

[0075] Exemplarily, one end of the first straight ruler 15 is connected with the second straight ruler 2 through the first end fixed block 16, and the first end screw 17 is fixedly connected with the first end nut after penetrating through the first straight ruler 15, the second straight ruler 2 and the first end fixed block 16, so as to realize the connection between the first straight ruler 15 and the second straight ruler 2, and make the second straight ruler 2 closely adhere to the side surface of the first straight ruler 15.

[0076] Similarly, the other end of the first straight ruler 15 is connected with the sliding arc ruler 7 through the second end fixed block 18, and the second end fixed block 18 is fixedly connected with the sliding arc ruler 7 (for example, welded or integrally formed), and the second end screw 19 is fixedly connected with the second end nut after penetrating through the first straight ruler 15 and the second end fixed block 18, so as to realize the connection between the first straight ruler 15 and the sliding arc ruler 7.

[0077] In order to realize the stable connection between the third straight ruler 3 and the fixed arc ruler 6, the above-mentioned curved caliper-shaped adapter measuring ruler further comprises a second straight ruler 20, one end of the second straight ruler 20 is connected with the third straight ruler 3, and the other end of the second straight ruler 20 is connected with the fixed arc ruler 6.

[0078] Exemplarily, one end of the second straight ruler 20 is connected with the third straight ruler 3 through the third end fixed block 21, and the third end screw 22 is fixedly connected with the third end nut after penetrating through the second straight ruler 20, the third straight ruler 3 and the third end fixed block 21, so as to realize the connection between the second straight ruler 20 and the third straight ruler 3, and make the third straight ruler 3 closely adhere to the side surface of the second straight ruler 20.

[0079] Similarly, the other end of the second straight ruler 20 is connected with the fixed arc ruler 6 through the fourth end fixed block 23, and the fourth end fixed block 23 is fixedly connected with the fixed arc ruler 6 (for example, welded or integrally formed), and the fourth end screw 24 is fixedly connected with the fourth end nut after penetrating through the second straight ruler 20 and the fourth end fixed block 23, so as to realize the connection between the second straight ruler 20 and the fixed arc ruler 6.

[0080] In order to improve the adaptability of the above-mentioned curved caliper-shaped adapter measuring ruler, so as to be able to measure the catheter with different diameters, a plurality of first mounting holes for detachably connecting with the second end fixed block 18 are arranged on the first straight ruler 15 along the length direction, and a plurality of second mounting holes for detachably connecting with the fourth end fixed block 23 are arranged on the second straight ruler 20 along the length direction. In this way, by changing the connection between the second end fixed block 18 and different first mounting holes, and changing the fixed connection between the fourth end fixed block 23 and different mounting holes, the length of the first straight ruler 15 and the second straight ruler 20 can be changed, and then the distance between the second straight ruler 2 and the third straight ruler 3 can be changed, so as to adapt to the measurement of the catheter with different diameters.

[0081] Exemplarily, the above-mentioned adapter measuring scale in the shape of a bent caliper includes a plurality of sets of the first connecting scale plate 15 and the second connecting scale plate 20, for example, 6 sets of the first connecting scale plate 15 and the second connecting scale plate 20, corresponding to 6 large size series respectively, i.e. Φ3, Φ6, Φ8, Φ10, Φ12 and Φ14, the center distance between the two adjacent first mounting holes and the two adjacent second mounting holes is 5 mm, and 5 levels are set for each series respectively. Correspondingly, for the Φ3 series, the outer diameters of the catheter that can be adapted are Φ3, Φ13, Φ23, Φ33 and Φ43 respectively; for the Φ6 series, the outer diameters of the catheter that can be adapted are Φ6, Φ16, Φ26, Φ36 and Φ46 respectively; for the Φ8 series, the outer diameters of the catheter that can be adapted are Φ8, Φ18, Φ28, Φ38 and Φ48 respectively; for the Φ10 series, the outer diameters of the catheter that can be adapted are Φ10, Φ20, Φ30, Φ40 and Φ50 respectively; for the Φ14 series, the outer diameters of the catheter that can be adapted are Φ14, Φ24, Φ34, Φ44 and Φ54 respectively. Therefore, through the above-mentioned 6 large size series of the first connecting scale plate 15 and the second connecting scale plate 20, the range of the outer diameter of the catheter from Φ3 to Φ54 can be basically covered.

[0082] From the perspective of spatial layout, catheter length and measurement interference, the structures of the second end fixed block 18 and the fourth end fixed block 23 are the same, both of which include a block body and a first mounting block and a second mounting block symmetrically arranged with respect to the circular arc plane formed by the fixed arc scale 6 and the sliding arc scale 7, mounting holes are set on the first mounting block and the second mounting block, the first mounting block of the second end fixed block 18 and the first mounting block of the fourth end fixed block 23 are located on the same side of the circular arc plane, and the second mounting block of the second end fixed block 18 and the second mounting block of the fourth end fixed block 23 are located on the other side of the circular arc plane.

[0083] In order to ensure the stability of the connection between the first connecting scale plate 15 and the second end fixed block 18 and the stability of the connection between the second connecting scale plate 20 and the fourth end fixed block 23, the second end fixed block 18 and the fourth end fixed block 23 are arranged along the tangent direction of the circular arc, so that the first connecting scale plate 15 and the second connecting scale plate 20 are arranged along the radial direction of the circular arc, i.e. the first connecting scale plate 15 and the second connecting scale plate 20 are perpendicular to the tangent plane of the circular arc.

[0084] In one aspect, from the perspective of spatial layout and the length of the pipe, the first scale plate 15 is connected to the first mounting block of the second end fixed block 18, and the second scale plate 20 is connected to the first mounting block of the fourth end fixed block 23, or the first scale plate 15 is connected to the second mounting block of the second end fixed block 18, and the second scale plate 20 is connected to the second mounting block of the fourth end fixed block 23, that is, the first scale plate 15 and the second scale plate 20 are located on the same side, which can reduce the overall volume of the bent-caliper-shaped adapter measuring scale, and can also reduce the transverse distance between the first scale plate 15 and the second scale plate 20, and adapt to the case where the length of the pipe is small.

[0085] In another aspect, from the perspective of measurement interference, the first scale plate 15 is connected to the first mounting block of the second end fixed block 18, and the second scale plate 20 is connected to the second mounting block of the fourth end fixed block 23, or the first scale plate 15 is connected to the second mounting block of the second end fixed block 18, and the second scale plate 20 is connected to the first mounting block of the fourth end fixed block 23, that is, the first scale plate 15 and the second scale plate 20 are located on different sides, so that the first scale plate 15 and the second scale plate 20 can coincide in the transverse plane without interference, thereby being applicable to the measurement of the case where the parameter B is zero.

[0086] It is worth noting that the connection between the pipe and the first ruler 1, the second ruler 2, the third ruler 3 and / or the fourth ruler 4 is a line connection, which has poor stability, and therefore the above-mentioned bent-caliper-shaped adapter measuring scale further comprises a U-shaped clamp 25, the pipe is fixedly connected to the first ruler 1 through the U-shaped clamp 25, and / or the pipe is connected to the second ruler 2 through the U-shaped clamp 25, and / or the pipe is connected to the third ruler 3 through the U-shaped clamp 25, and / or the pipe is connected to the fourth ruler 4 through the U-shaped clamp 25.

[0087] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. A curved caliper rule, characterized in that The utility model provides a YBC parameter for measuring curved pipe, the curved pipe includes first straight pipe section, first elbow section, second straight pipe section, second elbow section and third straight pipe section which are connected in turn, and the adapter measuring scale includes first ruler, second ruler, third ruler, fourth ruler, fixed arc ruler and sliding arc ruler. The first ruler and the second ruler are rotationally connected and the relative position can be fixed, the first ruler is arranged along the axial direction of the first straight pipe section and the side surface of the first ruler is attached to the first straight pipe section, and the second ruler is arranged along the axial direction of the second straight pipe section and the side surface of the second ruler is attached to the second straight pipe section. The third ruler and the fourth ruler are rotationally connected and the relative position can be fixed, the third ruler is arranged along the axial direction of the second straight pipe section and the side surface of the third ruler is attached to the side surface of the second straight pipe section, and the fourth ruler is arranged along the axial direction of the third straight pipe section and the side surface of the fourth ruler is attached to the side surface of the third straight pipe section. One end of the fixed arc ruler is slidingly connected to the other end of the fixed arc ruler and the relative position can be fixed, the fixed arc ruler and the fixed arc ruler form a circular arc, the other end of the fixed arc ruler is fixedly connected to the third ruler, and the other end of the sliding arc ruler is fixedly connected to the second ruler.

2. The curved-caliper rule adapter, according to claim 1, wherein, The fixed arc ruler is provided with a ring-shaped guide groove in the circumferential direction, and the sliding arc ruler is inserted into the ring-shaped guide groove.

3. The curved-caliper rule adapter, according to claim 2, wherein, Further comprising a guide block and a positioning rod, the guide block is located at the slot of the ring-shaped guide groove and is fixedly connected to the fixed arc ruler, and the positioning rod is in abutment with the sliding arc ruler after passing through the guide block.

4. The curved-caliper rule adapter according to claim 2, wherein, Further comprising a pressing block, the pressing block is located at the slot of the ring-shaped guide groove and is fixedly connected to the fixed arc ruler, and the pressing block is in abutment with the sliding arc ruler.

5. The curved-caliper rule adapter of claim 1, wherein: The first ruler, the second ruler, the third ruler and the fourth ruler each comprise a ruler body, a blind hole is formed in the ruler body, and a through hole is formed in the bottom of the blind hole.

6. The curved-caliper rule adapter, according to claim 5, wherein, The blind hole in the first ruler and the blind hole in the second ruler are directed to the same side. Alternatively, the blind hole in the first ruler and the blind hole in the second ruler are oppositely arranged. Alternatively, the blind hole in the first ruler and the blind hole in the second ruler are oppositely arranged.

7. The curved-caliper rule adapter according to claim 5, wherein, The blind hole in the third ruler and the blind hole in the fourth ruler are directed to the same side. Alternatively, the blind hole in the third ruler and the blind hole in the fourth ruler are oppositely arranged. Alternatively, the blind hole in the third ruler and the blind hole in the fourth ruler are oppositely arranged.

8. The curved-caliper rule adapter of claim 5, wherein, Further comprising a first fixing member, a first fixing screw and a first fixing nut, the first fixing screw is connected to the first fixing nut after passing through the first fixing member, the first ruler and the second ruler. Further comprising a second fixing member, a second fixing screw and a second fixing nut, the second fixing screw is connected to the second fixing nut after passing through the second fixing member, the third ruler and the fourth ruler.

9. The curved-caliper rule adapter according to claim 8, wherein, The first fixing member is located in the blind hole of the first ruler and cooperates with the blind hole in the first ruler. And / or, the first fixing member is located in the blind hole of the second ruler and cooperates with the blind hole in the second ruler.

10. The curved-caliper rule adapter of claim 8, wherein, The second fixing member is located in the blind hole of the third ruler and cooperates with the blind hole in the third ruler. And / or, the second fixing member is located in the blind hole of the fourth ruler and cooperates with the blind hole in the fourth ruler.

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