CN117329950A - Accurate measurement system and method for rotation angle of catheter during screwing and assembling of combined catheter - Google Patents

Abstract

The invention provides an accurate measurement system and method for a rotation angle of a catheter during screwing and assembling of a combined catheter. The system comprises a marking pen, an angle measuring disc, a self-aligning feeler gauge, a catheter clamping die, a cross reversing clamp and a supporting frame mechanism. The invention can realize accurate measurement of the rotation angle of the combined catheter, and the minimum resolution reaches 1 degree. The quick-change combined guide pipe clamp die with different specifications is designed, so that the combined guide pipes with different specifications are quickly installed, the coaxiality of the installation of the test combined guide pipe is guaranteed through the movable feeler gauge, the radius of the rotary scribing pen is 160-180 mm, the minimum scale of the angle measuring disc is 1 degree, and the measuring precision of the rotation angle is effectively guaranteed.

Description

Accurate measurement system and method for rotation angle of catheter during screwing and assembling of combined catheter

Technical Field

The invention relates to the technical field of measuring equipment, in particular to an accurate measuring system and method for a rotation angle of a catheter during screwing and assembling of a combined catheter.

Background

The pipeline system is used as an important component of the hydraulic system of the aircraft and is connected with a hydraulic source, a control device and an execution device of the aircraft, and plays an important role in medium transmission and power transmission just like a blood vessel. In order to realize complex hydraulic control functions in a narrow space, the performance requirements on the combined conduit forming a blood vessel are very strict, and particularly, the installation requirements in a high-pressure and ultrahigh-pressure pipeline system are more severe, however, the combined conduit tends to rotate relatively in actual assembly, the axial relative rotation of the combined conduit can introduce residual stress, the service life of the combined conduit can be influenced to a certain extent, in addition, the relative rotation can cause friction damage of a sealing surface, and the joint has the risk of sealing leakage. The conventional operation is to observe whether the relative rotation occurs after the catheter is screwed and assembled by using a scribing method, and the scribing method has the advantage of convenient operation, but cannot accurately measure the specific numerical value of the rotation angle, and the scribing method is seriously dependent on the operation method of an operator and has larger error in visual observation.

Based on the defects, the invention provides a precise measurement method for the rotation angle of the combined conduit during the screwing and assembling of the combined conduit, which can realize the precise measurement of the rotation angle of the combined conduit, and the minimum resolution reaches 1 degree. According to the invention, the quick-change combined guide pipe clamp die with different specifications is designed, so that the combined guide pipes with different specifications are quickly installed, the coaxiality of the installation of the test combined guide pipe is ensured through the movable feeler gauge, the radius of the rotary scribing pen is 160-180 mm, the minimum scale of the angle measuring disc is 1 DEG, and the measuring precision of the rotation angle is effectively ensured.

Disclosure of Invention

According to the above technical problems, a system and a method for precisely measuring the rotation angle of a catheter during the screwing and assembling of the combined catheter are provided.

The invention adopts the following technical means:

an accurate measurement system for the rotation angle of a catheter during a combination catheter tightening assembly, comprising: the device comprises a marking pen, an angle measuring disc, a aligning feeler gauge, a catheter clamping die, a cross reversing clamp and a supporting frame mechanism, wherein the angle measuring disc is fixed on the supporting frame mechanism, the aligning feeler gauge is assembled at the center of the angle measuring disc in a matched mode, a mounting and positioning U-shaped groove is formed in the center of the angle measuring disc, a positioning U-shaped groove is formed in the aligning feeler gauge, and during measurement, the lower end of a combined catheter of a test piece to be measured is vertically clamped and fixed on the fixing seat mechanism and sequentially penetrates through the mounting and positioning U-shaped groove and the positioning U-shaped groove from bottom to top;

the pipe clamping die is connected to the upper part of the combined pipe of the test piece to be tested, penetrates out of the positioning U-shaped groove, the cross reversing clamp is in threaded connection or interference fit with the pipe clamping die, the marking marker pen is arranged on the mounting hole of the cross reversing clamp, and the bottom end of the marking marker pen is in contact with the upper surface of the angle measuring disc; the combined guide pipe of the test piece to be tested is concentric with the angle measuring disc, and the marking marker pen is parallel to the axis of the combined guide pipe of the test piece to be tested;

the upper surface of angle measurement dish is equipped with circumference angle scale mark, and angle measurement dish scale mark diameter range is 300-400mm, through the axial distance of the fixed cross switching-over clamp on the spacing separation blade of slide bar for marking off marker falls in the angle mark line interval radius range 160-180 mm of angle scale mark, under the effect of applied moment, marking off marker rotates along with the test piece combination pipe that awaits measuring.

Further, the installation positioning U-shaped groove is a circular groove, the circular groove is of a U-shaped groove structure from the edge of the angle measuring disc to the center, and the center is a semicircular groove bottom; the positioning U-shaped groove is of a U-shaped groove structure with a semicircular inner end, and the diameter of the positioning U-shaped groove is larger than the outer diameter of the combined guide tube of the test piece to be tested.

Further, a plurality of bolt through holes are formed in the angle measuring disc, bolts are connected in the bolt through holes in a matched mode, and the angle measuring disc is locked on the supporting frame mechanism through the bolts and the bolt through holes; the bolt through holes are strip-shaped holes and are used for realizing front-back displacement adjustment of the angle measuring disc and adjusting the relative position of the angle measuring disc on the supporting frame mechanism.

Further, the angle scale marks have an angle range of 0-340 DEG, a large lattice of 10 DEG and a small lattice of 1 deg.

Further, the middle part of pipe clamp mould has seted up the cylinder hole, the outer wall at test piece combination pipe that awaits measuring is established to the cylinder hole cover, first screw hole has been seted up to one side wall of pipe clamp mould, and first bolt hole has been seted up to the opposite side wall, pipe clamp mould passes through first bolt hole to be fixed on test piece combination pipe that awaits measuring, through first screw hole and cross switching-over clamp fixed connection.

Further, the cross reversing clamp comprises a cross beam, the cross beam comprises a cross rod and a longitudinal rod, the longitudinal rod is connected to the cross rod in a sliding manner and is close to the outer end of the cross rod, the marking marker pen is installed on the longitudinal rod, a second threaded hole is formed in the inner end of the cross rod, the inner end of the cross rod is inserted into the first bolt hole of the catheter clamping die, and the cross reversing clamp is fixedly connected with the catheter clamping die through bolts in the second threaded hole in a matched manner;

the transverse rod is provided with two spaced spring clamps, the longitudinal rod is positioned between the two spring clamps, the spring clamps are used for limiting the movement of the longitudinal rod, and the marking marker pen is ensured to fall in a scale interval of 160-180 mm of the cross beam.

Further, a mounting hole and a second bolt hole perpendicular to the mounting hole are formed in one side of the longitudinal rod, the marking pen is inserted into the mounting hole, and the marking pen is fixed on the cross reversing clamp by screwing bolts in the second bolt hole in a matched connection mode;

the opposite side of vertical pole has seted up the third screw hole, the cooperation of third screw hole is connected with the bolt, through the bolt on the fine setting third screw hole, makes the marking off marker pen be in the suitable position on the angle scale sign.

Further, the support frame mechanism comprises a base, a main rod, a beam structure and a counterweight chassis, wherein the base is fixed on the counterweight chassis through bolts, the main rod is arranged on the base, the beam structure is arranged on the main rod, and the beam structure is fixedly connected with the angle measuring disc through a plurality of groups of bolts.

Further, the fixing seat mechanism is a mechanism with a clamping function.

The invention also provides a test method of the precise measurement system for the rotation angle of the catheter during the screwing and assembling of the combined catheter, which comprises the following steps:

step one, confirming the specification of a combined conduit of a test piece to be tested, and selecting an adapter matched with the combined conduit of the test piece to be tested, a digital display torque wrench meeting the tightening requirement, a conduit clamping die and a aligning feeler gauge;

step two, connecting a test piece combined conduit to be tested with an adapter to form an assembly, vertically fixing the assembly on a fixed seat mechanism, clamping six aspects of the adapter, then fixing an angle measuring disc on a supporting frame mechanism, and adjusting a beam structure of the supporting frame mechanism to enable the angle measuring disc to be at a proper height position of the test piece combined conduit to be tested, wherein the angle measuring disc is positioned in an axial 1/2-2/3 height interval of the test piece combined conduit to be tested;

step three, firstly manually adjusting to enable the circular groove of the angle measuring disc and the combined guide pipe of the test piece to be tested to be at a concentric position, visually observing, then placing the aligning feeler gauge into the circular groove of the angle measuring disc, and further adjusting the coaxiality of the combined guide pipe of the test piece to be tested and the angle measuring disc;

step four, installing a marking marker, namely fixing a conduit clamping die matched with a conduit on a combined conduit of a test piece to be tested, fixing a cross reversing clamp on the conduit clamping die, wherein a cross beam of the cross reversing clamp is provided with a length mark, the length of the cross beam is 200mm, a big grid scale is 20mm, a small grid scale is 2mm, installing the marking marker into an installation hole of the cross reversing clamp, locking and fixing, and adjusting the position of the cross reversing clamp to enable the marking marker to fall in a scale interval of 160-180 mm of the cross beam;

step five, manually pre-tightening the nut, applying a tightening torque to a specified value, then removing the torque, wherein the first torque is used for establishing stable friction fit between the screw pairs, manually tightening the nut again, loading the tightening torque to the specified value by using a torque wrench, and recording an angle corresponding to a track of the marking pen on the angle measuring disc when the marking pen is tightened for the second time, namely, representing the rotation angle.

Compared with the prior art, the invention has the following advantages:

1. the accurate measurement system and the accurate measurement method for the rotation angle of the combined conduit in the screwing and assembling process of the combined conduit can realize the accurate measurement of the rotation angle of the combined conduit, and the minimum resolution reaches 1 degree.

2. According to the accurate measurement system and method for the rotation angle of the combined guide pipe during screwing and assembling, provided by the invention, the combined guide pipe with different specifications is quickly installed by designing the quick-change combined guide pipe clamp die with different specifications, the coaxiality of the installation of the test combined guide pipe is ensured by the movable feeler gauge, the radius of the rotary scribing pen is 160-180 mm, the minimum scale of the angle measuring disc is 1 degree, and the measurement accuracy of the rotation angle is effectively ensured.

Based on the reasons, the invention can be widely popularized in the fields of measurement and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of the rotation angle test of the catheter according to the present invention.

FIG. 2 is a flow chart illustrating the operation of the method for testing the rotation angle of a catheter according to the present invention.

FIG. 3 is a schematic view of the dial plate of the present invention.

Fig. 4 is a schematic structural view of the aligning feeler gauge of the present invention.

FIG. 5 is a schematic view of a pipe clamp according to the present invention.

Fig. 6 is a schematic view of the structure of the cross-shaped reversing clip of the invention.

Fig. 7 is a schematic view of a supporting frame mechanism according to the present invention.

In the figure: 1. a test piece combination catheter to be tested; 2. marking off the marker pen; 3. an angle measuring disc; 31. an angle scale mark; 32. bolt through holes; 4. a self-aligning feeler gauge; 41. positioning the U-shaped groove; 5. a pipe clamp die; 51. a first threaded hole; 52. a first bolt hole; 6. a cross reversing clip; 61. a second threaded hole; 62. a spring clip; 63. a third threaded hole; 64. a mounting hole; 65. a second bolt hole; 7. a support frame mechanism; 71. a bolt; 72. a counterweight chassis.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The invention provides an accurate measurement system and method for a rotation angle of a catheter during screwing and assembling of a combined catheter.

The specific measurement principle is shown in fig. 1, the whole measurement system comprises five parts, the first part is a test piece combined guide pipe 1 to be measured, the second part is a test piece fixing seat mechanism, the third part is a marking pen 2, the fourth part is an angle measurement disc 3, the fifth part is a supporting frame mechanism 7, the test piece combined guide pipe 1 to be measured is vertically clamped and fixed on the fixing seat mechanism, the fixing seat mechanism can be a bench vice or other similar mechanism with a clamping device (mechanism with a clamping function), the marking pen 2 is fixed on a cross beam of a guide pipe clamp die 5 through a cross reversing clamp 6, the marking pen 2 is guaranteed to be parallel to the axis of the guide pipe, the angle measurement disc 3 is locked on a beam structure of the supporting frame mechanism 7 through a bolt 71, an adjusting bolt on the beam structure can realize front-back displacement adjustment of the angle measurement disc 3, the angle measurement disc 3 is provided with circumferential angle scale marks 31, the angle range is 0-340 DEG, the one big lattice is 10 DEG, the outer diameter of a mark line of the angle scale marks 31 is 300-400mm, the axial distance of the cross reversing clamp 6 on a limit stop piece is adjusted and fixed through adjusting and fixing the axial distance of the cross reversing clamp 6 on the limit stop piece is enabled to fall on the sliding rod mechanism to be guaranteed to be accurate in the radius range of the angle mark pen 2-180 mm, the whole measurement disc is guaranteed to be in the ideal distance, the diameter of the marking pen is ensured, the diameter is 180 is ensured, and the accuracy is ensured, the stability of the marking pen is ensured, and the accuracy is 180 is ensured. During actual measurement, one end of the test piece combined guide pipe 1 to be tested is clamped on the fixing seat mechanism, the other end of the test piece combined guide pipe 1 to be tested is in a free state, tightening assembly torque is applied to the test piece combined guide pipe 1 to be tested, when the combined guide pipe rotates, the marking marker pen 2 fixed on the cross reversing clamp 6 is driven to rotate simultaneously, the marking marker pen 2 leaves a motion track on the circumference of a scale mark area of the angle measuring disc 3, and after measurement is finished, the angle corresponding to the corresponding arc section is read to indicate the rotation angle of the combined guide pipe.

The specific test method operation flow is shown in fig. 2, wherein the first step is to confirm the specification of the test piece combined conduit 1 to be tested, and select an adapter fitting with the test piece combined conduit 1 to be tested, a digital display torque wrench meeting the tightening requirement, a conduit clamping die 5 and a centering clearance gauge 4 (centering movable clearance gauge); the second step is to connect the test piece combined conduit 1 to be tested with the adapter, vertically fix the assembly on the fixed seat mechanism, clamp six aspects of the adapter, then fix the angle measuring disc 3 on the supporting frame mechanism 7, adjust the crossbeam of the supporting frame mechanism 7 to make the angle measuring disc 3 to the proper height position of the test piece combined conduit 1 to be tested, the angle measuring disc 3 is located in the axial 1/2-2/3 height interval of the test piece combined conduit 1 to be tested more reasonable generally; thirdly, manually adjusting the circular groove of the angle measuring disc 3 and the combined guide tube 1 of the test piece to be tested to concentric positions (centering adjustment), visually observing, and then placing the centering feeler gauge 4 into the circular arc groove of the angle measuring disc 3 to further adjust the coaxiality of the combined guide tube 1 of the test piece to be tested and the angle measuring disc 3; the fourth step is to install the marking pen 2, firstly fix the pipe clamping die 5 which is matched with the pipe on the combined pipe 1 of the test piece to be tested, then fix the cross reversing clamp 6 on the cross beam of the pipe clamping die 5, the cross beam of the cross reversing clamp 6 is provided with a length mark, the length of the cross beam is 200mm, a big lattice scale is 20mm, a small lattice scale is 2mm, then install the marking pen 2 into the other mounting hole 64 of the cross reversing clamp 6, and lock and fix, then adjust the position of the cross reversing clamp 6 to enable the marking pen 2 to fall in the scale interval of 160-180 mm of the cross beam; and fifthly, manually pre-tightening the nut, applying a tightening torque to a specified value, then removing the torque, wherein the first torque is used for establishing stable friction fit between the screw pairs, manually tightening the nut again, loading the tightening torque to the specified value by using a torque wrench, and recording the angle corresponding to the track of the marking pen 2 on the angle measuring disc 3 during the second tightening, namely, representing the rotation angle.

Test fixture description

Fig. 3 is a schematic view of the dial (angle measuring plate 3) structure, and the dial is fixed to the support frame mechanism 7 by a plurality of bolt holes 32 using a plurality of sets of bolts. The bolt through holes 32 are made into long strips, so that the relative positions of the dials on the support frame mechanism 7 can be conveniently adjusted, and concentricity of the test piece and the dials can be ensured. The angle range of the circumferential angle scale markings 31 is 0-340 °. And the angle of rotation is measured when the test piece rotates by being matched with the marking marker pen 2 fixed on the cross reversing clip 6. The bottom end of the marker pen 2 is in contact with the upper surface of the angle measuring disk 3. The marking marker pen 2 rotates along with the combined guide tube 1 of the test piece to be tested.

The aligning feeler gauge 4 shown in fig. 4 is matched with the dial of fig. 3 to adjust concentricity of the test piece and the dial. The diameter of the positioning U-shaped groove 41 of the aligning feeler gauge 4 is slightly larger than the outer diameter of the test piece guide pipe, the aligning feeler gauge 4 is arranged at the circle center of the dial, and the test piece is leaned against the aligning feeler gauge 4, so that the test piece and the dial can be ensured to be approximately concentric. In addition, the test pieces with different specifications can be rapidly centered by designing the aligning feeler gauge 4 with different specifications to be matched with the test pieces with corresponding specifications. Specifically, aligning feeler gauge 4 is assembled in the center department of angle measurement dish 3 in the bank, and the center department of angle measurement dish 3 has seted up installation location U-shaped groove, and during the measurement, test piece combination pipe 1 that awaits measuring passes installation location U-shaped groove and location U-shaped groove 41 in proper order from bottom to top. The installation positioning U-shaped groove is a circular groove, the circular groove is of a U-shaped groove structure from the edge of the angle measuring disc 3 to the center, and the center is a semicircular groove bottom; the positioning U-shaped groove 41 is of a U-shaped groove structure with a semicircular inner end, and the diameter of the positioning U-shaped groove 41 is larger than the outer diameter of the combined guide tube 1 of the test piece to be tested.

The specific coaxiality guaranteeing scheme comprises the following steps: the aligning feeler gauge 4 is two-layer boss structure, and the boss is U-shaped structure, is the U-shaped groove that link up in the middle of the overall structure, and inside and outside U-shaped is coaxial design, and during the installation, the U-shaped boss structure of aligning feeler gauge 4 cooperates with the U-shaped groove bank of calibrated scale 3, guarantees the axiality of the U-shaped groove of aligning feeler gauge 4 and the U-shaped groove of calibrated scale 3, simultaneously, the U-shaped tank bottom circular arc of aligning feeler gauge 4 laminating with the pipe external diameter, the axiality with aligning feeler gauge 4 when guaranteeing the pipe installation. Furthermore, in order to adapt to the test of the combined conduit with full-line specifications, the aligning feeler gauge 4 and the conduit clamping die 5 are matched for use, and one set of aligning feeler gauge 4 and conduit clamping bread 5 are adapted to one specification combined conduit.

Fig. 5 shows a pipe clamping die 5, in which a cylindrical hole is formed in the middle of the pipe clamping die, and the cylindrical hole is sleeved on the outer wall of the combined pipe 1 of the test piece to be tested. A first screw hole 51 is formed in one side wall of the pipe clamp die 5, and a first screw hole 52 is formed in the other side wall. The pipe clamping die 5 is fixed to the test piece pipe through the first bolt hole 52 (the pipe clamping die 5 is connected to the test piece combination pipe 1 to be tested, and penetrates through the upper portion of the positioning U-shaped groove 41). The first threaded hole 51 cooperates with a second threaded hole 61 of the cross-shaped reversing clip 6 of fig. 6 to secure the cross-shaped reversing clip 6 to the test piece.

Fig. 6 is a cross reversing clip 6, which is in threaded connection or interference fit with the pipe clamping die 5, and comprises a cross beam, wherein the cross beam comprises a cross rod and a longitudinal rod, the longitudinal rod is slidably connected on the cross rod and is close to the outer end of the cross rod, the marking marker pen 2 is installed on the longitudinal rod, a second threaded hole 61 is formed in the inner end of the cross rod, the inner end of the cross rod is inserted into the first threaded hole 52 of the pipe clamping die 5, and the cross reversing clip 6 is fixedly connected with the pipe clamping die 5 through bolts in the second threaded hole 61 in a matched connection mode. One side of the vertical rod is provided with a mounting hole 64 and a second bolt hole 65 perpendicular to the mounting hole 64, the marking pen 2 is inserted into the cross mounting hole 64, and the marking pen 2 is fixed on the cross reversing clip 6 by tightening a bolt in the second bolt hole 65. The two spaced spring clamps 62 are arranged on the cross rod, the longitudinal rod is positioned between the two spring clamps 62, the spring clamps 62 play a limiting role to limit the movement of the longitudinal rod, and the marking marker 2 is ensured to fall in a scale interval of 160-180 mm of the cross beam. A third threaded hole 63 is formed in the other side of the longitudinal rod, a bolt is connected in the third threaded hole 63 in a matched mode, and the marking marker 2 is located at a proper position on the angle scale mark 31 through fine adjustment of the bolt on the third threaded hole 63.

Fig. 7 shows a support frame mechanism 7 for supporting the entire system. The support frame mechanism 7 comprises a base, a main rod, a beam structure and a counterweight chassis 72, wherein the base is fixed on the counterweight chassis 72 through bolts, the main rod is arranged on the base, the beam structure is arranged on the main rod, and the beam structure is fixedly connected with the angle measuring disc 3 through a plurality of groups of bolts 71.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. An accurate measurement system for the rotation angle of a catheter during the tightening assembly of a combination catheter, comprising: the marking marker comprises a marking marker pen (2), an angle measuring disc (3), a aligning feeler gauge (4), a catheter clamping die (5), a cross reversing clamp (6) and a supporting frame mechanism (7), wherein the angle measuring disc (3) is fixed on the supporting frame mechanism (7), the aligning feeler gauge (4) is assembled at the center of the angle measuring disc (3) in a matched mode, a mounting and positioning U-shaped groove is formed in the center of the angle measuring disc (3), a positioning U-shaped groove (41) is formed in the aligning feeler gauge (4), and during measurement, the lower end of a test piece combined catheter (1) to be measured is vertically clamped and fixed on a fixed seat mechanism and sequentially penetrates through the mounting and positioning U-shaped groove and the positioning U-shaped groove (41) from bottom to top;

the pipe clamping die (5) is connected to the upper part of the combined pipe (1) of the test piece to be tested, the upper part penetrates through the positioning U-shaped groove (41), the cross reversing clamp (6) is in threaded connection or interference fit with the pipe clamping die (5), the marking marker (2) is installed on an installation hole (64) of the cross reversing clamp (6), and the bottom end of the marking marker (2) is in contact with the upper surface of the angle measuring disc (3); the combined guide pipe (1) of the test piece to be tested is concentric with the angle measuring disc (3), and the marking marker pen (2) is parallel to the axis of the combined guide pipe (1) of the test piece to be tested;

the upper surface of angle measurement dish (3) is equipped with circumference angle scale mark (31), and the scale mark diameter scope of angle measurement dish (3) is 300-400mm, through the axial distance of the spacing separation blade of adjustment fixed cross switching-over clamp (6) on the slide bar for marking off marker (2) fall in the range of angle mark line interval radius 160 ~ 180mm of angle scale mark (31), under the effect of applied moment, marking off marker (2) are rotatory along with test piece combination pipe (1) to be tested.

2. The accurate measurement system for the rotation angle of the combined conduit during the screwing and assembling process of the combined conduit according to claim 1, wherein the installation and positioning U-shaped groove is a circular groove, the circular groove is a U-shaped groove structure from the edge of the angle measuring disc (3) to the center, and the center is a semicircular groove bottom; the positioning U-shaped groove (41) is of a U-shaped groove structure with a semicircular inner end, and the diameter of the positioning U-shaped groove (41) is larger than the outer diameter of the combined guide tube (1) of the test piece to be tested.

3. The precise measurement system for the rotation angle of the catheter during the screwing and assembling of the combined catheter according to claim 1, wherein a plurality of bolt through holes (32) are formed in the angle measurement disc (3), bolts (71) are connected in the bolt through holes (32) in a matched manner, and the angle measurement disc (3) is locked on the support frame mechanism (7) through the bolts (71) and the bolt through holes (32); the bolt through holes (32) are strip-shaped holes and are used for realizing front-back displacement adjustment of the angle measuring disc (3) and adjusting the relative position of the angle measuring disc (3) on the supporting frame mechanism (7).

4. The precise measurement system for the rotation angle of a conduit during the tightening assembly of a combined conduit according to claim 1, wherein the angle scale markings (31) have an angle ranging from 0 to 340 °, a big one of 10 ° and a small one of 1 °.

5. The precise measurement system for the rotation angle of the catheter during the screwing and assembling of the combined catheter according to claim 1, wherein the middle part of the catheter clamping die (5) is provided with a cylindrical hole, the cylindrical hole is sleeved on the outer wall of the combined catheter (1) of the test piece to be tested, one side wall of the catheter clamping die (5) is provided with a first threaded hole (51), the other side wall of the catheter clamping die is provided with a first bolt hole (52), and the catheter clamping die (5) is fixed on the combined catheter (1) of the test piece to be tested through the first bolt hole (52) and is fixedly connected with the cross reversing clamp (6) through the first threaded hole (51).

6. The precise measurement system for the rotation angle of the catheter during the screwing and assembling of the combined catheter according to claim 1, wherein the cross reversing clip (6) comprises a cross beam, the cross beam comprises a cross rod and a longitudinal rod, the longitudinal rod is connected on the cross rod in a sliding way and is close to the outer end of the cross rod, the marking marker pen (2) is installed on the longitudinal rod, a second threaded hole (61) is formed in the inner end of the cross rod, the inner end of the cross rod is inserted into the first bolt hole (52) of the catheter clamping die (5), and the fixed connection between the cross reversing clip (6) and the catheter clamping die (5) is realized through bolts in the second threaded hole (61) in a matched connection mode;

the transverse rod is provided with two spaced spring clamps (62), the longitudinal rod is located between the two spring clamps (62), the spring clamps (62) are used for limiting movement of the longitudinal rod, and the marking marker (2) is guaranteed to fall in a scale interval of 160-180 mm of the cross beam.

7. The precise measurement system for the rotation angle of the combined conduit during the screwing and assembling process of the combined conduit according to claim 6, wherein a mounting hole (64) and a second bolt hole (65) perpendicular to the mounting hole (64) are formed on one side of the longitudinal rod, the marking marker (2) is inserted into the mounting hole (64), and the marking marker (2) is fixed on the cross reversing clip (6) by screwing a bolt which is connected in a matched manner in the second bolt hole (65);

a third threaded hole (63) is formed in the other side of the longitudinal rod, a bolt is connected in the third threaded hole (63) in a matched mode, and the marking marker (2) is located at a proper position on the angle scale mark (31) through fine adjustment of the bolt on the third threaded hole (63).

8. The precise measurement system for the rotation angle of the catheter during the screwing assembly of the combined catheter according to claim 1, wherein the support frame mechanism (7) comprises a base, a main rod, a beam structure and a counterweight chassis (72), the base is fixed on the counterweight chassis (72) through bolts, the main rod is mounted on the base, the beam structure is mounted on the main rod, and the beam structure is fixedly connected with the angle measurement disc (3) through a plurality of groups of bolts (71).

9. The precise measurement system for the rotation angle of a conduit during the tightening and assembly of a composite conduit according to claim 1, wherein the fixing seat mechanism is a mechanism having a clamping function.

10. A test method for an accurate measurement system for the rotation angle of a conduit during the tightening assembly of a combined conduit according to any one of claims 1 to 9, comprising the steps of:

step one, confirming the specification of a test piece combined guide pipe (1) to be tested, and selecting an adapter matched with the test piece combined guide pipe (1) to be tested, a digital display torque wrench meeting the screwing requirement, a guide pipe clamping die (5) and a aligning feeler gauge (4);

step two, connecting a test piece combined guide pipe (1) to be tested with an adaptive adapter to form an combined piece, vertically fixing the combined piece on a fixed seat mechanism, clamping six aspects of the adapter, then fixing an angle measuring disc (3) on a supporting frame mechanism (7), and adjusting a beam structure of the supporting frame mechanism (7) to enable the angle measuring disc (3) to be at a proper height position of the test piece combined guide pipe (1), wherein the angle measuring disc (3) is positioned in an axial 1/2-2/3 height interval of the test piece combined guide pipe (1) to be tested;

step three, firstly manually adjusting to enable the circular groove of the angle measuring disc (3) and the combined guide tube (1) of the test piece to be tested to be at a concentric position, visually observing, then placing the aligning feeler gauge (4) into the circular groove of the angle measuring disc (3), and further adjusting the coaxiality of the combined guide tube (1) of the test piece to be tested and the angle measuring disc (3);

step four, installing a marking pen (2), namely fixing a conduit clamping die (5) matched with the conduit on a combined conduit (1) of a test piece to be tested, fixing a cross reversing clamp (6) on the conduit clamping die (5), wherein a cross beam of the cross reversing clamp (6) is provided with a length mark, the length of the cross beam is 200mm, a large scale is 20mm, a small scale is 2mm, installing the marking pen (2) into an installation hole (64) of the cross reversing clamp (6), locking and fixing, and then adjusting the position of the cross reversing clamp (6) to enable the marking pen (2) to fall in a scale section of 160-180 mm of the cross beam;

step five, manually pre-tightening the nut, applying a tightening torque to a specified value, then removing the torque, wherein the first torque is used for establishing stable friction fit between screw pairs, manually tightening the nut again, loading the tightening torque to the specified value by using a torque wrench, and recording an angle corresponding to a track of the marking pen (2) on the angle measuring disc (3) when the marking pen is tightened for the second time, namely, representing a rotation angle.