CN117110091A - Device and method for detecting torsion resistance of joint/catheter in combined catheter - Google Patents
Device and method for detecting torsion resistance of joint/catheter in combined catheter Download PDFInfo
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- CN117110091A CN117110091A CN202311004413.2A CN202311004413A CN117110091A CN 117110091 A CN117110091 A CN 117110091A CN 202311004413 A CN202311004413 A CN 202311004413A CN 117110091 A CN117110091 A CN 117110091A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims description 23
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/26—Investigating twisting or coiling properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention provides a device and a method for detecting the torsion resistance of a joint/a catheter in a combined catheter, wherein the method comprises the following steps: selecting a torque wrench and a conduit plate clamp which are suitable for the specification of the combined conduit to be detected; installing a combined conduit to be detected in a detection device; drawing a marking line at a part of the to-be-detected end which can rotate, wherein the marking line is parallel to the axis of the to-be-detected combined catheter; the torque wrench applies torque to a preset qualified torque; and observing whether the marking line is disconnected or not, if the marking line is not disconnected, judging that the combined conduit to be detected is qualified, and if the marking line is disconnected, observing the included angle between the end part of the disconnected marking line and the axis of the combined conduit to be detected, wherein the included angle exceeds a preset value, judging that the product is unqualified, and the included angle does not exceed the preset value, judging that the product is qualified. The invention can realize the measurement of the combined guide pipes with different specifications and still ensure the coaxiality of the combined guide pipes in the measurement process.
Description
Technical Field
The invention relates to the technical field of pipeline torsion resistance detection, in particular to a device and a method for detecting the torsion resistance of a joint/a catheter in a combined catheter.
Background
The pipeline system is used as an important component of hydraulic systems of aircrafts, ships and automobiles and is connected with a hydraulic source, a control device and an execution device, and plays an important role in medium transmission and power transmission just like a blood vessel. In order to realize a complex hydraulic control function in a narrow space, the performance requirements on the combined conduit forming a blood vessel are very strict, but the tensile performance of the combined conduit is required in the conventional product specification and technical standard, the torsion resistance of the combined conduit is rarely mentioned, the actual pipeline system is not only subjected to axial tensile working conditions but also subjected to torsion industrial control, and particularly, the combined conduit needs to bear larger installation torque in the installation process of the combined conduit. At present, a detection method and related standards for the maturity of the torsion performance of a joint catheter are not yet found, although a torsion testing machine can be used for testing the torsion resistance performance of a combined catheter, the torsion testing machine is high in price, limited in precision and range, incapable of covering the combined catheter with full-line specifications, and incapable of guaranteeing the coaxiality in the testing process in a limited manner when using tiger bench clamp for manual measurement, and additional bending moment is brought in the testing process, so that the testing result is large.
Disclosure of Invention
In accordance with the above technical problem, an apparatus and a method for detecting the torsion resistance of a joint/catheter in a combined catheter are provided.
The invention adopts the following technical means:
the device for detecting the torsional resistance of the joint/the catheter in the combined catheter comprises a base, wherein a vice and a supporting seat which are arranged side by side are fixed on the base;
the vice comprises a main body, wherein two sides of the upper end of the main body are respectively provided with a positioning reference surface and a fixed block, a clamping block is arranged between the positioning reference surface and the fixed block, a screw rod penetrates through the fixed block to be fixedly connected with the clamping block, and the screw rod is in threaded fit with the fixed block;
the support seat comprises two supports which are arranged up and down, the support positioned below is fixedly connected with the base, one end of the support positioned above is hinged with one end of the support positioned below, and the other end of the support positioned above is fixedly connected with the other end of the support positioned below through a bolt; the upper surface of the bracket positioned below and the lower surface of the bracket positioned above are respectively provided with semicircular grooves, and the two grooves are spliced together to form a complete circle; the two grooves are respectively detachably connected with a conduit plate clamp, the outer wall of the conduit plate clamp is matched with the grooves, and the inner wall of the conduit plate clamp is a semicircular conduit groove; the two duct grooves are spliced together to form a complete circle, and the inner wall of the duct groove is matched with the outer wall of the duct of the combined duct to be detected;
the to-be-detected end of the to-be-detected combined guide pipe is positioned at the vice and clamped between the clamping blocks and the positioning reference surface, part of the guide pipe is positioned in the guide pipe plate clamp, and the torsion applying end of the to-be-detected combined guide pipe is positioned outside the guide pipe plate clamp.
Preferably, the conduit groove and the groove are concentrically arranged or eccentrically arranged, and the conduit plate clamps with different specifications are adopted for the combined conduits to be detected with different specifications, so that the torque force applying end, the conduit and the end to be detected are ensured to be coaxial in the processes of being limited by the conduit plate clamps and being clamped by the vice.
Preferably, the bracket is provided with a sinking groove at two sides of the groove respectively, and a limiting piece which is rotationally connected with the bracket is arranged in the sinking groove;
the side wall of the conduit plate clamp is provided with an arc-shaped groove at the position opposite to the limiting piece;
rotating the limiting piece to enable part of the limiting piece to be positioned in the arc-shaped groove, and limiting and installing the conduit plate clamp in the groove; and the limiting piece is rotated to be not in the arc-shaped groove, so that the catheter plate clamp is convenient to detach.
Preferably, the vice is fixedly connected with the base through a supporting bottom plate, the supporting bottom plate is fixedly connected with the base, the two ends of the supporting bottom plate are provided with upward bulges at the positions of the positioning reference surface and the fixed block, and the main body is provided with a recess matched with the bulges at the positions of the bottom of the positioning reference surface and the bottom of the fixed block; the main body is arranged on the supporting bottom plate, the protrusions enter the recesses and are fixedly connected through bolts arranged on the side walls.
Preferably, a torque wrench is used to apply torque to the torque application end.
The invention also discloses a method for detecting the torsion resistance of the joint/the catheter in the combined catheter, which comprises the following steps:
s1: selecting a torque wrench and a conduit plate clamp which are suitable for the specification of the combined conduit to be detected;
s2: assembling a conduit plate clamp in the bracket, installing a conduit of the combined conduit to be detected in the conduit plate clamp, clamping a to-be-detected end of the combined conduit to be detected between the clamping block and the positioning reference surface, and connecting a torsion applying end of the combined conduit to be detected with the torque wrench outside the conduit plate clamp and ensuring that the torsion applying end, the conduit and the to-be-detected end are coaxial in the process of being limited by the conduit plate clamp and being clamped by the vice;
s3: drawing a marking line at a part of the to-be-detected end which can rotate, wherein the marking line is parallel to the axis of the to-be-detected combined catheter;
s4: the torque wrench applies torque to a preset qualified torque;
s5: observing whether the marking line is disconnected or not, if the marking line is not disconnected, the to-be-detected combined catheter is qualified, and if the marking line is disconnected, observing the included angle between the end part of the disconnected marking line and the axis of the to-be-detected combined catheter, wherein the included angle exceeds a preset value, the product is unqualified, and the included angle does not exceed the preset value, and the product is qualified;
s6: repeating steps S4 and S5 ensures the reliability of the detection result.
Preferably, the preset value is 2 °.
Preferably, the torque wrench is a digital torque wrench.
The invention can test the torsion resistance of the combined catheter test piece with all connection modes including but not limited to axial extrusion, rolling, radial extrusion, welding and the like. The torsion applying end structure is arbitrary, and can be clamped and measured by a torsion wrench. The end to be tested may include, but is not limited to, any pipe connection means that can be mated with the adapter by adapting to the torque wrench test, such as axial extrusion, rolling, radial extrusion, welding, etc.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, one end of the vice is set as the positioning reference surface, the conduit plate clamps are detachably connected, and the conduit grooves of the conduit plate clamps are set in an eccentric or concentric mode, so that the coaxiality of the combined conduit in the measuring process can be ensured when the combined conduit with different specifications is measured.
2. The invention can test the torsion resistance of the combined catheter test piece in various connection modes and has wider application range.
Based on the reasons, the method can be widely popularized in the fields of detection of the torsion resistance of the aviation pipeline 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 these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view (concentric) of an apparatus for testing the anti-twist performance of a joint/conduit in a combined conduit according to an embodiment of the present invention.
Fig. 2 is a schematic view (eccentricity) of an apparatus for detecting anti-twisting performance of a joint/pipe in a combined pipe according to an embodiment of the present invention.
FIG. 3 is an exploded view of an apparatus for testing the torsional resistance of a joint/conduit in a combined conduit according to an embodiment of the present invention.
Fig. 4 is a schematic view of a scaffold structure according to an embodiment of the present invention.
FIG. 5 is a diagram of a combined conduit pattern to be tested (unconnected adapter) according to an embodiment of the invention.
FIG. 6 is a diagram of a sample of a common end to be detected in an embodiment of the present invention.
Fig. 7 is a diagram of a drawing of a combined conduit to be tested (connection adapter) according to an embodiment of the present invention.
In the figure: 1. a base; 2. a vice; 21. a main body; 22. positioning a reference surface; 23. a fixed block; 24. clamping blocks; 25. a screw rod; 26. a recess; 3. a support base; 31. a bracket; 32. a conduit plate clip; 33. a conduit groove; 34. a limiting piece; 35. an arc-shaped groove; 4. a support base plate; 4 1. A protrusion; 5. a combined catheter to be detected; 51. a conduit; 52. a detection end; 53. a torque application end.
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 one 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.
Example 1
As shown in fig. 1 to 7, a device for detecting the torsion resistance of a joint/a catheter in a combined catheter comprises a base 1, wherein a vice 2 and a supporting seat 3 which are arranged side by side are fixed on the base 1, and the vice 2 is fixedly connected with the base 1 through a supporting bottom plate 4.
The vice 2 comprises a main body 21, wherein two sides of the upper end of the main body 21 are respectively provided with a positioning reference surface 22 and a fixed block 23, a clamping block 24 is arranged between the positioning reference surface 22 and the fixed block 23, a screw rod 25 penetrates through the fixed block 23 to be fixedly connected with the clamping block 24, and the screw rod 25 is in threaded fit with the fixed block 23; the main body 21 is provided with a concave recess 26 at the bottom of the positioning reference surface 22 and the bottom of the fixed block 23;
the supporting base plate 4 is fixedly connected with the base 1, two ends of the supporting base plate 4 are provided with upward protrusions 41 at the positions of the positioning reference surface 22 and the fixing blocks 23, the main body 21 is arranged on the supporting base plate 4, the protrusions 41 enter the recesses 26, and the two ends of the supporting base plate 4 are fixedly connected through bolts arranged on the side walls.
The supporting seat 3 comprises two brackets 31 which are arranged up and down, the bracket 31 positioned below is fixedly connected with the base 1, one end of the bracket 31 positioned above is hinged with one end of the bracket 31 positioned below, and the other end of the bracket 31 positioned above is fixedly connected with the other end of the bracket 31 positioned below through bolts; the two brackets 31 can be opened after the bolts are removed, and the two brackets 31 can be locked after the bolts are locked. The upper surface of the bracket 31 positioned below and the lower surface of the bracket 31 positioned above are respectively provided with semicircular grooves, and the two grooves are spliced together to form a complete circle; the two grooves are respectively detachably connected with a conduit board clamp 32, the outer wall of the conduit board clamp 32 is matched with the grooves, and the inner wall of the conduit board clamp is a semicircular conduit groove 33; the two duct grooves 33 are spliced together to form a complete circle, and the inner wall is matched with the outer wall of the duct 51 of the combined duct 5 to be detected; the to-be-detected end 52 of the to-be-detected combined conduit 5 is located at the vice 2 and clamped between the clamping block 24 and the positioning reference surface 22, a part of the conduit 51 is located in the conduit plate clamp 32, and the torsion applying end 53 of the to-be-detected combined conduit 5 is located outside the conduit plate clamp 32. A torque is applied to the torque application end 53 using a torque wrench. The torque wrench adopts a digital display torque wrench. The torque application end 53 is of any structure as long as it can be held and measured by a torque wrench.
The conduit groove 33 is arranged concentrically or eccentrically with the groove, and the conduit plate clamps 32 with different specifications are adopted for the combined conduits to be detected with different specifications, so that the torque force applying end 53, the conduit 51 and the end 52 to be detected are ensured to be coaxial in the process of being supported by the conduit groove 33 and being clamped by the vice. In the case of detecting the largest-sized combined catheter (as shown in fig. 1), a configuration in which the catheter groove 33 is concentric with the groove is adopted. When detecting the combined conduit with other specifications (as shown in fig. 2), the eccentric arrangement mode of the conduit groove 33 and the groove is adopted, so that one side of the to-be-detected end 52 is always propped against the positioning reference surface 22, and after the specifications of the to-be-combined conduit are changed, the position of the conduit 51 is only required to be adjusted, namely, the eccentric arrangement mode is adopted, so that the coaxiality of the combined conduit can be still ensured.
As shown in fig. 4, the bracket 31 is provided with a sink groove at two sides of the groove, and a limiting piece 34 rotatably connected with the bracket 31 is installed in the sink groove; the side wall of the conduit plate clamp 32 is provided with an arc-shaped groove 35 at the position opposite to the limiting piece 34; the limiting sheet adopted in the specific embodiment of the invention is in the original sheet shape, and a part of the limiting sheet is cut off. Rotating the limiting piece 34 to enable the arc part of the limiting piece to be located in the arc-shaped groove 35, and limiting and installing the conduit board clamp 34 in the groove; the limiting piece 35 is rotated to enable the arc part of the limiting piece 35 not to be located in the arc groove 35, namely, the corresponding position of the cut-out part is opposite to the outer edge of the arc groove 35, so that the limiting piece 35 cannot play a limiting role, and the catheter board clamp 32 can be conveniently and rapidly detached.
Example 2
As shown in fig. 1 to 7, based on the device provided in example 1, the present invention also discloses a method for detecting the torsion resistance of the joint/catheter in the combined catheter,
the method comprises the following steps:
s1: selecting a torque wrench and a conduit plate clamp 32 which are suitable for the specification of the combined conduit 5 to be detected;
the invention can test the torsion resistance of the combined conduit test piece in all connection modes including but not limited to axial extrusion, rolling, radial extrusion, welding and the like, and the pattern diagram of the combined conduit test piece is shown in the figure 5.
The end to be measured 52, shown in fig. 5, is an axial extrusion connection mode of the end to be measured 52, and all the pipe connection modes including, but not limited to, axial extrusion, rolling, radial extrusion, welding, etc. can be measured and matched with the adaptor to be tested by the torque wrench (as shown in fig. 6). The end 52 to be tested in the partial connection mode is a sleeved nut structure capable of freely rotating around the axis of the test piece (as shown in fig. 5), so that a proper adapter and sleeved nut are selected to be screwed tightly (as shown in fig. 7), and the stability of the end 52 to be tested of the test piece is ensured.
The conduit 51 is exemplified by a combination conduit in which the conduit 51 is a titanium tube.
The torque application end 53 is of any structure as long as it can be held and measured by a torque wrench.
S2: assembling a conduit plate clamp 32 in the bracket 31, and installing a conduit 51 of the combined conduit 5 to be detected in the conduit plate clamp 32, wherein a to-be-detected end 52 of the combined conduit 5 to be detected is clamped between the clamping block 24 and the positioning reference surface 22, a torsion applying end 53 of the combined conduit 5 to be detected is positioned outside the conduit plate clamp 32 and connected with the torque wrench, and the torsion applying end 53, the conduit 51 and the to-be-detected end 52 are ensured to be coaxial in the process of being limited by the conduit plate clamp 32 and being clamped by the vice 2;
s3: marking a mark line (as shown in fig. 7) at a portion where the end 52 to be detected can rotate, wherein the mark line is parallel to the axis of the combined catheter 5 to be detected;
s4: the torque wrench applies torque to a preset qualified torque;
tightening the adapter and the jacknut torque are detailed in table 1 below with reference to HB 7000. The torsion resistance of the test pieces of different specifications is different, and the reference specifications of the adapting torque wrench of the detection combined conduit 5 of different specifications are given in the following table 1.
TABLE 1 tightening torque during test piece installation
S5: observing whether the marking line is disconnected or not, if the marking line is not disconnected, the to-be-detected combined conduit 5 is qualified, and if the marking line is disconnected, observing the included angle between the end part of the disconnected marking line and the axis of the to-be-detected combined conduit 5, wherein the included angle exceeds a preset value, the product is considered to be unqualified, and the included angle does not exceed the preset value, and the product is considered to be qualified; the preset value is 2 degrees.
S6: repeating steps S4 and S5 ensures the reliability of the detection result.
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 (7)
1. The device for detecting the torsion resistance of the joint/the catheter in the combined catheter is characterized by comprising a base, wherein a vice and a supporting seat which are arranged side by side are fixed on the base;
the vice comprises a main body, wherein two sides of the upper end of the main body are respectively provided with a positioning reference surface and a fixed block, a clamping block is arranged between the positioning reference surface and the fixed block, a screw rod penetrates through the fixed block to be fixedly connected with the clamping block, and the screw rod is in threaded fit with the fixed block;
the support seat comprises two supports which are arranged up and down, the support positioned below is fixedly connected with the base, one end of the support positioned above is hinged with one end of the support positioned below, and the other end of the support positioned above is fixedly connected with the other end of the support positioned below through a bolt; the upper surface of the bracket positioned below and the lower surface of the bracket positioned above are respectively provided with semicircular grooves, and the two grooves are spliced together to form a complete circle; the two grooves are respectively detachably connected with a conduit plate clamp, the outer wall of the conduit plate clamp is matched with the grooves, and the inner wall of the conduit plate clamp is a semicircular conduit groove; the two duct grooves are spliced together to form a complete circle, and the inner wall of the duct groove is matched with the outer wall of the duct of the combined duct to be detected;
the to-be-detected end of the to-be-detected combined guide pipe is positioned at the vice and clamped between the clamping blocks and the positioning reference surface, part of the guide pipe is positioned in the guide pipe plate clamp, and the torsion applying end of the to-be-detected combined guide pipe is positioned outside the guide pipe plate clamp.
2. The device for detecting the torsion resistance of a joint/conduit in a combined conduit according to claim 1, wherein the conduit groove is arranged concentrically or eccentrically with respect to the groove, and the combined conduit to be detected of different specifications employs the conduit plate clamps of different specifications, so that the torsion force applying end, the conduit and the end to be detected are ensured to be coaxial during the process of being limited by the conduit plate clamps and the clamping by the vice.
3. The device for detecting the torsional resistance of a joint/a catheter in a combined catheter according to claim 1, wherein the bracket is respectively provided with a sinking groove at two sides of the groove, and a limiting piece which is rotationally connected with the bracket is arranged in the sinking groove;
the side wall of the conduit plate clamp is provided with an arc-shaped groove at the position opposite to the limiting piece;
rotating the limiting piece to enable part of the limiting piece to be positioned in the arc-shaped groove, and limiting and installing the conduit plate clamp in the groove; and the limiting piece is rotated to be not in the arc-shaped groove, so that the catheter plate clamp is convenient to detach.
4. The device for detecting the torsional resistance of a joint/a catheter in a combined catheter according to claim 1, wherein the vice is fixedly connected with the base through a supporting bottom plate, the supporting bottom plate is fixedly connected with the base, two ends of the supporting bottom plate are provided with upward bulges at the positions of the positioning reference surface and the fixed block, and the main body is provided with a concave matched with the bulges at the positions of the bottom of the positioning reference surface and the bottom of the fixed block; the main body is arranged on the supporting bottom plate, the protrusions enter the recesses and are fixedly connected through bolts arranged on the side walls.
5. A device for combined catheter hub/catheter torsional resistance testing as defined in claim 1 wherein torque is applied to said torque applying end using a torque wrench.
6. A method for testing the torsional resistance of a joint/catheter in a combined catheter, using the device of any one of claims 1-5, comprising the steps of:
s1: selecting a torque wrench and a conduit plate clamp which are suitable for the specification of the combined conduit to be detected;
s2: assembling a conduit plate clamp in the bracket, installing a conduit of the combined conduit to be detected in the conduit plate clamp, clamping a to-be-detected end of the combined conduit to be detected between the clamping block and the positioning reference surface, and connecting a torsion applying end of the combined conduit to be detected with the torque wrench outside the conduit plate clamp and ensuring that the torsion applying end, the conduit and the to-be-detected end are coaxial in the process of being limited by the conduit plate clamp and being clamped by the vice;
s3: drawing a marking line at a part of the to-be-detected end which can rotate, wherein the marking line is parallel to the axis of the to-be-detected combined catheter;
s4: the torque wrench applies torque to a preset qualified torque;
s5: and observing whether the marking line is disconnected or not, if the marking line is not disconnected, the combined catheter to be detected is qualified, and if the marking line is disconnected, observing the included angle between the end part of the disconnected marking line and the axis of the combined catheter to be detected, wherein the included angle exceeds a preset value, the product is unqualified, and the included angle does not exceed the preset value, and the product is qualified.
7. A method for combined catheter mid-joint/catheter torsional resistance testing according to claim 6, wherein the preset value is 2 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311004413.2A CN117110091A (en) | 2023-08-10 | 2023-08-10 | Device and method for detecting torsion resistance of joint/catheter in combined catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311004413.2A CN117110091A (en) | 2023-08-10 | 2023-08-10 | Device and method for detecting torsion resistance of joint/catheter in combined catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117110091A true CN117110091A (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311004413.2A Pending CN117110091A (en) | 2023-08-10 | 2023-08-10 | Device and method for detecting torsion resistance of joint/catheter in combined catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117110091A (en) |
-
2023
- 2023-08-10 CN CN202311004413.2A patent/CN117110091A/en active Pending
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