Inner wall passing ability detection tool

Abstract

The invention discloses an inner wall trafficability detection tool, and relates to the field of detection equipment. A sheath tube is clamped and fixed in a detection cabinet through a positioning mechanism, and a detection rod can be pulled through a pulling assembly, so that the detection rod drives an elastic detection piece to move along the interior of the sheath tube; the elastic detection piece can provide radial tension to simulate the scene when the surgical instrument passes through the sheathing canal when passing through the sheathing canal, and then the tension sensor detects the traction tension between the traction assembly and the detection rod, so that the detection rod, the elastic detection piece, the positioning mechanism, the traction assembly and the tension sensor are matched to detect the traction tension between the surgical instrument and the detection rod. According to the device, the inner wall trafficability simulation detection of the sheathing canal can be carried out, and the trafficability of mutual cooperation of the sheathing canal and a surgical instrument can be systematically evaluated in an approximate physiological environment, so that the sheathing canal detection precision is improved, and the situation that the operation hand feeling, the surgical success rate and the overall use safety are influenced due to deviation of the sheathing canal in clinical practical application is prevented.

Description

Technical Field

[0001] This invention belongs to the field of testing equipment, and more specifically, relates to a tooling for testing the passability of inner walls. Background Technology

[0002] The sheath is a core basic instrument in interventional surgery, and its function is to establish a temporary and stable artificial working channel in minimally invasive procedures. Inserted through tiny puncture points on the body surface, the sheath allows various surgical instruments such as guidewires, catheters, stents, and ablation electrodes to safely and smoothly enter and exit repeatedly, accurately reaching target locations such as blood vessels, cavities, or lesions in the body, while effectively protecting tissues along the way and controlling bleeding.

[0003] During the manufacturing process of surgical sheaths, rigorous quality testing is required, including physical properties, dimensional accuracy, and basic functionality, to ensure product compliance with specifications. However, current testing technologies primarily focus on static indicators such as sheath dimensions, mechanical strength, and sealing performance, using this data to determine quality. Such testing often fails to realistically simulate the complex and dynamic operational scenarios of actual surgery, particularly lacking a systematic evaluation of the sheath's interoperability with surgical instruments under near-physiological conditions. This can lead to discrepancies between test results and the sheath's performance in clinical applications, consequently affecting its handling feel, surgical success rate, and overall safety. Summary of the Invention

[0004] In view of the problems in the related technologies, the present invention proposes an inner wall passability detection tool to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an inner wall passability testing fixture, comprising a testing cabinet, wherein a testing mechanism, a tensile testing machine, and a positioning mechanism are installed inside the testing cabinet. The positioning mechanism can clamp and fix the sheath to be tested inside the testing cabinet. The testing mechanism includes a testing rod, on which a radially expanding elastic testing element is installed. An adjustment support assembly is installed on the inner ring of the elastic testing element, which can adjust the radial tension and diameter of the elastic testing element. The tensile testing machine includes a traction assembly and a tension sensor. The traction assembly can pull the detection rod so that the detection rod can drive the elastic detection element to move along the inside of the sheath under the traction of the traction assembly. The tension sensor can detect the traction force between the traction assembly and the detection rod.

[0006] Preferably, the detection rod includes a front detection rod and a rear detection rod, the elastic detection element is installed between the front detection rod and the rear detection rod, and the front detection rod has a connection hole at its front end for connecting with the traction assembly.

[0007] Preferably, the elastic detection element includes multiple elastic rods, all of which are fixedly connected and installed between the front detection rod and the rear detection rod, and each of the elastic rods is bent and deformed outward so that the multiple elastic rods surround the front detection rod and the rear detection rod to form an elastic expansion body.

[0008] Preferably, the adjusting support assembly includes an adjusting base, which is disposed on the inner ring of a plurality of elastic rods. A plurality of positioning shafts corresponding one-to-one with the elastic rods are fixedly installed on the outer ring of the adjusting base. A telescopic support shaft is slidably installed inside the positioning shaft. The telescopic support shaft is fixedly connected to the corresponding elastic rod. An elastic support member capable of supporting the telescopic support shaft is installed inside the positioning shaft. A telescopic adjustment unit is installed inside the adjusting base. The telescopic adjustment unit can drive the plurality of elastic support members to extend outward or retract inward simultaneously.

[0009] Preferably, the elastic support includes a rotating shaft and a bushing. The bushing is fixedly installed on the inner end of the positioning shaft. A support shaft is slidably installed inside the bushing. The outer ring of the support shaft is fixedly installed with a spline arranged axially and slidably engaging with the bushing. A pressure sensor is installed on the outer end of the support shaft. A pressure spring is abutted between the pressure sensor and the telescopic support shaft. The rotating shaft is rotatably mounted inside the adjusting base. The outer end of the rotating shaft is threadedly mounted inside the support shaft. The inner end of the rotating shaft is connected to the telescopic adjusting unit. The telescopic adjusting unit can drive multiple rotating shafts to rotate synchronously. The telescopic adjusting unit includes an adjusting shaft and multiple gears. The adjusting shaft is rotatably mounted inside the adjusting base. An adjusting port is provided at the outer end of the adjusting shaft. A gear ring is fixedly mounted on the adjusting shaft. Multiple gears are respectively fixedly mounted on the inner ends of the corresponding rotating shafts, and all of the multiple gears are meshed and connected to the gear ring.

[0010] Preferably, the positioning mechanism includes a sheath tube limiting component, multiple cylinders, and a clamping and positioning assembly. The sheath tube limiting component is disposed inside the testing cabinet, and the interior of the sheath tube limiting component has a channel for the sheath tube to pass through. The multiple cylinders are fixedly installed in pairs on both sides of the sheath tube limiting component, and clamping plates are fixedly installed on the telescopic ends of each cylinder. The clamping and positioning assembly is fixedly installed inside the testing cabinet and located at one end of the inlet of the internal channel of the sheath tube limiting component, so that the clamping and positioning assembly can assist in clamping and positioning the end of the sheath tube during testing.

[0011] Preferably, the clamping and positioning component includes a clamping base, which is fixedly installed inside the testing cabinet. A clamping drive unit is installed inside the clamping base, and multiple clamps are arranged above the clamping base. The clamping drive unit can drive the multiple clamps to center and retract for clamping.

[0012] Preferably, the clamping drive unit includes a drive block and two clamping rods. The drive block is slidably installed inside the clamping seat. A lifting drive component is connected and installed at the bottom end of the drive block. A clamp is fixedly installed at the top end of the drive block. Pushing slopes are provided on both sides of the drive block. Both clamping rods are rotatably mounted on both sides of the drive block. A clamping head is fixedly mounted on the top of each clamping rod, and a roller is rotatably mounted on the bottom of each clamping rod. The roller rolls against the corresponding pushing inclined surface.

[0013] Preferably, the clamping drive unit further includes two pull plates, which are respectively disposed on both sides of the drive block, and the bottom end of the pull plate is rotatably connected to the clamping seat. The inner end of the pull plate is provided with an arc-shaped guide groove, and the outer end of the pull plate is provided with a limiting groove. A guide rod that slides and engages with the arc-shaped guide groove is fixedly installed on the drive block, and a pull rod that slides and engages with the limiting groove is fixedly installed on the clamping rod.

[0014] Preferably, the pulling assembly includes a guide wheel and a bracket. The bracket is fixedly installed inside the inspection cabinet. A take-up reel is rotatably mounted on the bracket. A rotary drive component capable of driving the take-up reel to rotate is also fixedly mounted on the bracket. A pull rope is wound on the take-up reel. One end of the pull rope can be tied to the inspection rod. The tension sensor is mounted on the pull rope. The guide wheel is rotatably installed inside the inspection cabinet and can guide and limit the pull rope. The rotary drive component includes a motor and a transmission wheel. The motor is fixedly mounted on the bracket. A drive wheel is driven to the output end of the motor. The transmission wheel is fixedly mounted to one end of the take-up reel. The drive wheel and the transmission wheel are connected by a transmission belt.

[0015] The present invention has the following beneficial effects: 1. In this invention, the sheath is clamped and fixed inside the testing cabinet by a positioning mechanism, and the testing rod is pulled by a traction assembly, so that the testing rod drives the elastic testing element to move along the inside of the sheath. The elastic testing element can provide radial tension when passing through the sheath to simulate the scenario when surgical instruments pass through the sheath. Then, a tension sensor detects the traction force between the traction assembly and the testing rod. Thus, through the cooperation of the testing rod, the elastic testing element, the positioning mechanism, the traction assembly, and the tension sensor, the passability of the inner wall of the sheath can be simulated and tested. The passability of the sheath and surgical instruments in a near-physiological environment can be systematically evaluated, thereby improving the accuracy of sheath testing and preventing deviations in the sheath in actual clinical applications, which would affect the operation feel, surgical success rate, and overall safety of use.

[0016] 2. In this invention, an adjustment support assembly is installed on the inner ring of the elastic detection element to adjust the radial tension and diameter of the elastic detection element. By adjusting the radial tension and diameter of the elastic detection element, the sheath wall passability test can be simulated using surgical instruments of different diameters and flexibility, thereby improving the detection range and the comprehensiveness of the detection data, and providing more data support for the clinical use of the sheath.

[0017] 3. The positioning mechanism in this invention includes a sheath limiting component and a clamping positioning component. The sheath limiting component is a biomimetic human body structure, which simulates the human body channels (blood vessel channels and intestines, etc.) through which the sheath can pass, thereby simulating the usage state of the sheath during surgery, which is beneficial to improving the accuracy of the sheath's inner wall passability detection. The clamping positioning component can assist in clamping and positioning the sheath, preventing the sheath from being driven to move under the frictional resistance of the elastic detection component during detection, and ensuring that the detection process is carried out normally and stably.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of the detection mechanism of the present invention; Figure 2 This is a side view of the detection mechanism of the present invention; Figure 3 This is one of the end view views of the detection mechanism of the present invention; Figure 4 This is a second end view of the detection mechanism of the present invention; Figure 5 This is the second three-dimensional structural schematic diagram of the detection mechanism of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram at point A; Figure 7 This is the third end view of the detection mechanism of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram at point B; Figure 9 This is one of the three-dimensional structural schematic diagrams of the inner wall passability detection fixture of the present invention; Figure 10For the present invention Figure 9 A magnified structural diagram at point C; Figure 11 This is the second three-dimensional structural schematic diagram of the inner wall passability detection fixture of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram at point D; Figure 13 For the present invention Figure 11 A magnified structural diagram at point E; Figure 14 This is the third three-dimensional structural diagram of the inner wall passability detection fixture of the present invention; Figure 15 For the present invention Figure 14 A magnified structural diagram at point F; Figure 16 This is the fourth three-dimensional structural schematic diagram of the inner wall passability detection fixture of the present invention; Figure 17 For the present invention Figure 16 A magnified structural diagram at point G.

[0021] In the diagram: 1. Detection mechanism; 11. Connecting hole; 12. Elastic rod; 13. Adjusting base; 14. Telescopic support shaft; 15. Front detection rod; 16. Rear detection rod; 17. Positioning shaft; 18. Adjusting shaft; 19. Gear ring; 110. Gear; 111. Support shaft; 112. Rotating shaft; 113. Bushing; 114. Pressure sensor; 115. Pressure spring; 2. Detection cabinet; 3. Tensile testing machine; 31. Pull rope; 32. Tensile sensor; 33. Guide wheel; 34. Bracket; 35. Motor; 36. Reel; 37. Drive wheel; 38. Drive belt; 39. Drive wheel; 4. Positioning mechanism; 41. Sheath tube limiting component; 42. Cylinder; 43. Clamping plate; 44. Clamping seat; 45. Chuck; 46. Drive block; 47. Pushing inclined plane; 48. Clamping rod; 49. Roller; 410. Pull plate; 411. Arc-shaped guide groove; 412. Guide rod; 413. Pull rod; 414. Limiting groove. Detailed Implementation

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1 Please see Figure 1 , Figure 9 , Figure 10 As shown, this embodiment is an inner wall passability testing fixture, including a testing cabinet 2. A testing mechanism 1, a tensile testing machine 3, and a positioning mechanism 4 are installed inside the testing cabinet 2. The positioning mechanism 4 can clamp and fix the sheath to be tested inside the testing cabinet 2. The testing mechanism 1 includes a testing rod with a radially expanding elastic testing element installed on it. An adjustment support assembly is installed on the inner ring of the elastic testing element to adjust the radial tension and diameter of the elastic testing element. The tensile testing machine 3 includes a pulling assembly and a tension sensor 32. The pulling assembly can pull the testing rod so that the testing rod can drive the elastic testing element to move along the inside of the sheath under the traction of the pulling assembly. The tension sensor 32 can detect the traction force between the pulling assembly and the testing rod.

[0025] When performing a sheath wall passability test, the sheath to be tested is clamped and fixed in the testing cabinet 2 by the positioning mechanism 4. Then, the traction assembly is passed through the sheath and connected to the testing rod. The traction assembly then pulls the testing rod, causing the testing rod to move the elastic detection element along the inside of the sheath. The elastic detection element provides radial tension when passing through the sheath to simulate the scenario of surgical instruments passing through the sheath. The tension sensor 32 then detects the traction force between the traction assembly and the testing rod. Thus, through the cooperation of the testing rod, the elastic detection element, the positioning mechanism 4, the traction assembly, and the tension sensor 32, It can simulate and test the passability of the inner wall of the sheath, systematically evaluate the passability of the sheath and surgical instruments, thereby improving the accuracy of sheath testing and preventing deviations in the actual clinical application of the sheath, which would affect the operation feel, surgical success rate and overall safety. Moreover, during the test, the radial tension and diameter of the elastic testing element can be adjusted by adjusting the support component, so as to simulate the passability test of the inner wall of the sheath with surgical instruments of different diameters and flexibility, thereby improving the detection range and the comprehensiveness of the detection data, and providing more data support for the clinical use of the sheath.

[0026] Example 2 Please see Figures 1-8As shown, the difference between this embodiment and the above embodiment is that the detection rod includes a front detection rod 15 and a rear detection rod 16, the elastic detection element is installed between the front detection rod 15 and the rear detection rod 16, and the front detection rod 15 has a connection hole 11 for connecting with the traction assembly at its front end; the elastic detection element includes a plurality of elastic rods 12, all of which are fixedly connected and installed between the front detection rod 15 and the rear detection rod 16, and each elastic rod 12 is bent and deformed outward so that the plurality of elastic rods 12 surround the front detection rod 15 and the rear detection rod 16 to form an elastic expansion body.

[0027] During testing, the front detection rod 15 is connected to the traction assembly through the connecting hole 11, so that the traction assembly can pull the detection rod as a whole within the sheath. At this time, multiple elastic rods 12 surround the elastic expansion body to provide radial tension to the inner wall of the sheath to simulate the scenario when surgical instruments pass through the sheath, thereby performing the sheath inner wall passability test. Both the front detection rod 15 and the rear detection rod 16 are made of flexible materials, so that the detection rod can move through the bending parts inside the sheath, thereby enabling the testing fixture to perform the passability test at the bending points of the sheath, thereby improving the testing accuracy.

[0028] Furthermore, the adjusting support assembly includes an adjusting base 13, which is disposed within the inner ring of a plurality of elastic rods 12. A plurality of positioning shafts 17, corresponding one-to-one with the elastic rods 12, are fixedly installed on the outer ring of the adjusting base 13. A telescopic support shaft 14 is slidably installed within the positioning shaft 17, and the telescopic support shaft 14 is fixedly connected to the corresponding elastic rod 12. An elastic support member capable of supporting the telescopic support shaft 14 is installed inside the positioning shaft 17. A telescopic adjustment unit is installed inside the adjusting base 13, which can drive multiple elastic support members to simultaneously extend outwards or simultaneously retract inwards. The elastic support member includes a rotating shaft 112 and a bushing 113. The bushing 113 is fixedly installed on the inner end of the positioning shaft 17. A support shaft 111 is slidably installed within the bushing 113, and an axially aligned support shaft 111 is fixedly installed on the outer ring of the support shaft 111. The 113 is a sliding spline. A pressure sensor 114 is installed on the outer end of the support shaft 111. A pressure spring 115 is installed between the pressure sensor 114 and the telescopic support shaft 14. The rotating shaft 112 is rotatably installed in the adjusting base 13. The outer end of the rotating shaft 112 is threadedly installed inside the support shaft 111. The inner end of the rotating shaft 112 is connected to the telescopic adjusting unit. The telescopic adjusting unit can drive multiple rotating shafts 112 to rotate synchronously. The telescopic adjusting unit includes an adjusting shaft 18 and multiple gears 110. The adjusting shaft 18 is rotatably installed inside the adjusting base 13. An adjusting port is provided on the outer end of the adjusting shaft 18. A gear ring 19 is fixedly installed on the adjusting shaft 18. Multiple gears 110 are respectively fixedly installed on the inner end of the corresponding rotating shaft 112, and all multiple gears 110 are meshed and connected to the gear ring 19.

[0029] The rotating shaft 112, the support shaft 111, the pressure spring 115, and the telescopic support shaft 14 work together to provide elastic support for the elastic rod 12, so that the elastic rod 12 can undergo corresponding elastic deformation when passing through the inner wall of the sheath (such as when passing through the bend of the sheath), preventing the detection rod from getting stuck in the sheath and ensuring that the detection process can proceed normally. When the elastic rod 12 is abutted and deformed, the corresponding pressure sensor 114 can detect the compressive force on the elastic rod 12, thereby simulating the radial compressive force on the surgical instrument when passing through the sheath, and thus providing reference data for the research and development design of surgical instruments and sheaths. When it is necessary to adjust the extension and retraction of multiple elastic rods 12 around an elastic expansion body to simulate the inner wall passability test of surgical instruments with different diameters and different flexibility, the adjustment knob corresponding to the adjustment socket on the outer end of the adjustment shaft 18 is inserted into the adjustment socket. Then, the adjustment knob drives the adjustment shaft 18 to rotate, which in turn drives the gear ring 19 to rotate. When the gear ring 19 rotates, it meshes and drives multiple gears 110 to rotate synchronously, which in turn drives multiple rotating shafts 112 to rotate synchronously. When the rotating shafts 112 rotate, they can drive the support shaft 111 to extend and retract to adjust the bending arc of the elastic rods 12. Specifically, when it is necessary to adjust and increase the outer diameter of the elastic expansion body, multiple rotating shafts 112 are driven to rotate synchronously, causing the rotating shafts 112 to drive the support shaft 111 to move outward through threaded transmission. At this time, the support shaft 111 compresses the pressure spring 115 and pushes the telescopic support shaft 14 outward through the pressure spring 115. This causes the telescopic support shaft 14 to deform the elastic rod 12 outward, thus increasing the outer diameter of the elastic expansion body, enhancing its toughness, and increasing the resistance when passing through the sheath. Conversely, when it is necessary to adjust and decrease the outer diameter of the elastic expansion body, multiple rotating shafts 112 are driven in the opposite direction. Rotation causes the rotating shaft 112 to drive the support shaft 111 to move inward and contract via a threaded transmission. At this time, the pressure spring 115 returns to its original position and its elasticity decreases, reducing the supporting force on the elastic rod 12. Consequently, the elastic rod 12's return arc decreases under its own elasticity. This reduces the outer diameter and toughness of the elastic expansion body, decreasing the resistance when passing through the sheath. Thus, through the cooperation of the elastic support and the telescopic adjustment unit, multiple elastic rods 12 can be telescopically adjusted to form an elastic expansion body, simulating the sheath's inner wall passability test using surgical instruments of different diameters and flexibility.

[0030] Example 3 Please see Figures 9-11 , Figure 13 , Figure 16 , Figure 17As shown, the difference between this embodiment and the above embodiment is that the positioning mechanism 4 includes a sheath tube limiting member 41, multiple cylinders 42, and a clamping and positioning assembly. The sheath tube limiting member 41 is disposed inside the testing cabinet 2, and the interior of the sheath tube limiting member 41 is provided with a channel for the sheath tube to pass through. The multiple cylinders 42 are fixedly installed in pairs on both sides of the sheath tube limiting member 41, and the extension and retraction ends of the cylinders 42 are all fixedly installed with clamping plates 43. The clamping and positioning assembly is fixedly installed inside the testing cabinet 2 and is located at one end of the inlet of the internal channel of the sheath tube limiting member 41, so that the clamping and positioning assembly can assist in clamping and positioning the end of the sheath tube during testing.

[0031] Among them, the sheath limiting member 41 is a biomimetic human body structure, which simulates the human biomimetic channel (blood vessel channel or intestine, etc.) for the sheath to pass through. When the inner wall of the sheath is tested, the sheath is inserted into the biomimetic channel in the sheath limiting member 41, so that the sheath can simulate the use state during surgery, which helps to improve the accuracy of the inner wall of the sheath. The end of the sheath is located outside the sheath limiting member 41, and the end of the sheath is assisted in clamping and positioning by the clamping and positioning component to prevent the sheath from being driven to move under the frictional resistance of the elastic detection component during the test, and to ensure that the test process is normal and stable.

[0032] Furthermore, the clamping and positioning assembly includes a clamping base 44, which is fixedly installed inside the inspection cabinet 2. A clamping drive unit is installed inside the clamping base 44, and multiple chucks 45 are arranged above the clamping base 44. The clamping drive unit can drive the multiple chucks 45 to center and retract for clamping. The clamping drive unit includes a drive block 46 and two clamping rods 48. The drive block 46 is slidably installed inside the clamping base 44. A lifting drive component is connected to the bottom end of the drive block 46, and a chuck 45 is fixedly installed at the top end of the drive block 46. Pushing inclined surfaces 47 are provided on both sides of the drive block 46. The two clamping rods 48 are rotatably installed on both sides of the drive block 46. A chuck 45 is fixedly installed at the top end of the clamping rods 48, and a roller 49 is rotatably installed at the bottom end of the clamping rods 48. The roller 49 rolls against the corresponding pushing inclined surface 47.

[0033] The lifting drive component is a lifting cylinder or hydraulic cylinder. When clamping the sheath, the lifting drive component drives the drive block 46 to move upward, so that the drive block 46 drives the chuck 45 at its top to move upward. At the same time, the drive block 46 pushes the roller 49 outward through the push-in inclined surfaces 47 on both sides, so that the lower end of the clamping rod 48 rotates outward, and the top end of the clamping rod 48 drives the chuck 45 to move inward, so that the three chucks 45 move inward and close together to clamp and position the sheath. Thus, through the push-in movement of the drive block 46, the chucks 45 can be driven to stably clamp the sheath to assist in the inner wall passability detection of the sheath.

[0034] Furthermore, the clamping drive unit also includes two pull plates 410, which are respectively disposed on both sides of the drive block 46, and the bottom end of the pull plate 410 is rotatably connected to the clamping seat 44. The inner end of the pull plate 410 is provided with an arc-shaped guide groove 411, and the outer end of the pull plate 410 is provided with a limiting groove 414. A guide rod 412 that is slidably engaged with the arc-shaped guide groove 411 is fixedly installed on the drive block 46, and a pull rod 413 that is slidably engaged with the limiting groove 414 is fixedly installed on the clamping rod 48. When the drive block 46 moves upward to drive the clamping rod 48 to rotate and move, thereby driving the chuck 45 to close and clamp, the drive block 46 drives the guide rod 412 to move upward along the arc-shaped guide groove 411. At this time, the guide rod 412 pushes and rotates outward towards the upper end of the pull plate 410. When it is necessary to loosen the clamping of the sheath tube, the lifting drive component drives the drive block 46 to move downward and reset. At this time, the drive block 46 drives the chuck 45 at its top to move downward and reset. At the same time, the drive block 46 drives the guide rod 412 to move downward and reset along the arc-shaped guide groove 411, so that the guide rod 412 drives the upper end of the pull plate 410 to rotate inward and reset. Meanwhile, the pull plate 410, through the cooperation of the limiting groove 414 and the pull rod 413, pulls the lower end of the clamping rod 48 inward and resets, thereby causing the upper end of the clamping rod 48 to drive the chuck 45 to rotate outward and reset. Thus, through the cooperation of the drive block 46 and the pull plate 410, multiple chucks 45 can be driven to move outward and open simultaneously, loosening the clamping and positioning of the sheath tube.

[0035] Example 4 Please see Figures 9-12 , Figure 14 , Figure 15 As shown, the difference between this embodiment and the above embodiment is that the pulling assembly includes a guide wheel 33 and a bracket 34. The bracket 34 is fixedly installed inside the inspection cabinet 2. A take-up reel 36 is rotatably installed on the bracket 34. A rotary drive component that can drive the take-up reel 36 to rotate is also fixedly installed on the bracket 34. A pull rope 31 is wound on the take-up reel 36. One end of the pull rope 31 can be tied to the inspection rod. A tension sensor 32 is installed on the pull rope 31. The guide wheel 33 is rotatably installed inside the inspection cabinet 2 and can guide and limit the pull rope 31. The rotary drive component includes a motor 35 and a transmission wheel 39. The motor 35 is fixedly installed on the bracket 34. A drive wheel 37 is driven to the output end of the motor 35. The transmission wheel 39 is fixedly installed at one end of the take-up reel 36. The drive wheel 37 and the transmission wheel 39 are connected by a transmission belt 38.

[0036] When performing a sheath inner wall passability test, one end of the pull rope 31 is passed through the inside of the sheath and connected to the detection rod. Then, the motor 35 is turned on, and the motor 35 drives the winding reel 36 to rotate through the drive wheel 37, the transmission belt 38 and the transmission wheel 39. This causes the winding reel 36 to start winding the pull rope 31. As the pull rope 31 is winding, it pulls the detection rod, causing the detection rod to gradually pass through the inside of the sheath. At the same time, the tension sensor 32 detects the traction force of the pull rope 31, thereby measuring the resistance when the detection rod passes through the inner wall of the sheath.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

Claims

1. A tooling for detecting the passability of inner walls, comprising a detection cabinet, characterized in that: The testing cabinet is equipped with a testing mechanism, a tensile testing machine, and a positioning mechanism. The positioning mechanism can clamp and fix the sheath tube to be tested in the testing cabinet. The testing mechanism includes a testing rod, on which an elastic testing element that expands radially is installed. The inner ring of the elastic testing element is equipped with an adjustment support assembly that can adjust the radial tension and diameter of the elastic testing element. The tensile testing machine includes a traction assembly and a tension sensor. The traction assembly can pull the detection rod so that the detection rod can drive the elastic detection element to move along the inside of the sheath under the traction of the traction assembly. The tension sensor can detect the traction force between the traction assembly and the detection rod.

2. The inner wall passability testing fixture according to claim 1, characterized in that: The detection rod includes a front detection rod and a rear detection rod, the elastic detection element is installed between the front detection rod and the rear detection rod, and the front end of the front detection rod is provided with a connection hole for connecting with the traction assembly.

3. The inner wall passability testing fixture according to claim 2, characterized in that: The elastic detection element includes multiple elastic rods, which are fixedly connected and installed between the front detection rod and the rear detection rod. Each elastic rod is bent and deformed outward so that the multiple elastic rods surround the front detection rod and the rear detection rod to form an elastic expansion body.

4. The inner wall passability testing fixture according to claim 3, characterized in that: The adjustable support assembly includes an adjustable base, which is disposed on the inner ring of a plurality of elastic rods. A plurality of positioning shafts corresponding one-to-one with the elastic rods are fixedly installed on the outer ring of the adjustable base. A telescopic support shaft is slidably installed inside the positioning shaft. The telescopic support shaft is fixedly connected to the corresponding elastic rod. An elastic support member capable of supporting the telescopic support shaft is installed inside the positioning shaft. A telescopic adjustment unit is installed inside the adjustable base. The telescopic adjustment unit can drive the plurality of elastic support members to extend outward or retract inward simultaneously.

5. The inner wall passability testing fixture according to claim 4, characterized in that: The elastic support includes a rotating shaft and a bushing. The bushing is fixedly installed on the inner end of the positioning shaft. A support shaft is slidably installed inside the bushing. The outer ring of the support shaft is fixedly installed with a spline that is axially arranged and slidably engaged with the bushing. A pressure sensor is installed on the outer end of the support shaft. A pressure spring is abutted between the pressure sensor and the telescopic support shaft. The rotating shaft is rotatably installed in the adjusting base. The outer end of the rotating shaft is threadedly installed inside the support shaft. The inner end of the rotating shaft is connected to the telescopic adjusting unit. The telescopic adjusting unit can drive multiple rotating shafts to rotate synchronously.

6. The inner wall passability testing fixture according to claim 1, characterized in that: The positioning mechanism includes a sheath tube limiting component, multiple cylinders, and a clamping and positioning assembly. The sheath tube limiting component is located inside the testing cabinet, and its interior has a channel for the sheath tube to pass through. The multiple cylinders are fixedly installed in pairs on both sides of the sheath tube limiting component, and each cylinder has a clamping plate fixedly installed at its telescopic end. The clamping and positioning assembly is fixedly installed inside the testing cabinet and located at one end of the inlet of the internal channel of the sheath tube limiting component, so that the clamping and positioning assembly can assist in clamping and positioning the end of the sheath tube during testing.

7. The inner wall passability testing fixture according to claim 6, characterized in that: The clamping and positioning assembly includes a clamp base, which is fixedly installed inside the inspection cabinet. A clamping drive unit is installed inside the clamp base, and multiple clamps are arranged above the clamp base. The clamping drive unit can drive the multiple clamps to center and retract for clamping.

8. The inner wall passability testing fixture according to claim 7, characterized in that: The clamping drive unit includes a drive block and two clamping rods. The drive block is slidably installed inside the clamping seat. A lifting drive component is connected and installed at the bottom end of the drive block. A chuck is fixedly installed at the top end of the drive block. Pushing slopes are provided on both sides of the drive block. Both clamping rods are rotatably mounted on both sides of the drive block. A clamping head is fixedly mounted on the top of each clamping rod, and a roller is rotatably mounted on the bottom of each clamping rod. The roller rolls against the corresponding pushing inclined surface.

9. The inner wall passability testing fixture according to claim 8, characterized in that: The clamping drive unit also includes two pull plates, which are respectively disposed on both sides of the drive block. The bottom end of the pull plate is rotatably connected to the clamping seat. The inner end of the pull plate is provided with an arc-shaped guide groove, and the outer end of the pull plate is provided with a limiting groove. A guide rod that slides and engages with the arc-shaped guide groove is fixedly installed on the drive block, and a pull rod that slides and engages with the limiting groove is fixedly installed on the clamping rod.

10. The inner wall passability testing fixture according to claim 1, characterized in that: The pulling assembly includes a guide wheel and a bracket. The bracket is fixedly installed inside the testing cabinet. A take-up reel is rotatably mounted on the bracket. A rotary drive component that can drive the take-up reel to rotate is also fixedly mounted on the bracket. A pull rope is wound on the take-up reel. One end of the pull rope can be tied and connected to the testing rod. The tension sensor is mounted on the pull rope. The guide wheel is rotatably mounted inside the testing cabinet and can guide and limit the pull rope.

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