A method and device for preventing errors in the forward and reverse orientation of a catheter

Abstract

This application relates to the field of production assembly technology and discloses a method and device for preventing errors in the forward and reverse orientation of a conduit. The method includes a forward and reverse rotation mechanism fixing plate, a detection component on one side of the fixing plate, and a rotation correction component on the other side. The detection component includes a drive cylinder and a displacement sensor, with the displacement sensor located at the power output end of the drive cylinder. The rotation correction component includes a swing cylinder, with its power output end connected to a forward and reverse rotation shaft. The forward and reverse rotation shaft has a cavity structure inside. The detection end of the displacement sensor is positioned opposite to the opening end of the cavity structure. The detection component and the rotation correction component are respectively fixed to the side wall of the forward and reverse rotation mechanism fixing plate. This invention solves the problem of defective parts being produced during press-fitting due to the inability to quickly and accurately determine the forward and reverse orientation and perform rotation correction during the conduit feeding process.

Description

Technical Field

[0001] This invention relates to the field of production assembly technology, specifically to a method and device for preventing errors in the forward and reverse orientation of conduits. Background Technology

[0002] In the automated assembly process related to conduits, the conduits often need to enter the pressing station to physically connect with other components during the feeding stage. Conduits have specific requirements for their orientation. If the orientation of the conduit is reversed during feeding and it directly enters the subsequent mechanical pressing stage, the pressing action will directly damage the conduit or the mating components, resulting in the assembled product becoming a defective product, causing direct material waste and quality problems for the factory.

[0003] To prevent conduit reversal during production, current methods include manual sorting and the introduction of visual recognition systems. Manual selection and flipping are slow, and workers are prone to fatigue from repetitive actions, leading to potential omissions or errors. This approach is ill-suited to the pace of modern mass production. Some automated production lines use industrial cameras in conjunction with multi-axis robotic arms for orientation determination and correction. However, these devices are highly complex, resulting in high initial manufacturing costs. Furthermore, the complex electronic systems are susceptible to interference from lighting conditions and slight reflections on the conduit surface, leading to false alarms. The numerous moving parts increase maintenance difficulty and costs, and downtime reduces production line efficiency, hindering stable product yield. Therefore, this invention proposes a conduit reversal error prevention method and device to address the shortcomings of existing technologies. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method and device for preventing errors in the orientation of conduits, which solves the problems of the inability to quickly and accurately determine the orientation of conduits during the feeding process and perform rotational correction, resulting in defective parts during press fitting, as well as the problems of existing error-proofing equipment having complex structures, high manufacturing and maintenance costs, and potential judgment risks.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The first aspect of this invention provides a method for preventing errors in catheter orientation, comprising the following steps:

[0007] The catheter to be tested is pushed axially into the chamber inside the positive and negative rotation axis for positioning. When the catheter to be tested enters the positive and negative rotation axis in the positive or negative direction, a displacement difference to be tested is formed.

[0008] The drive cylinder pushes the displacement sensor to extend in the direction of the positive and negative rotation axis, so that the detection rod set at the front end of the displacement sensor contacts the exposed end face of the tube to be detected and reads the corresponding displacement data. The control system determines the positive and negative state of the tube to be detected based on the displacement data.

[0009] After the displacement sensor reads the displacement data, the drive cylinder pulls the displacement sensor and the detection rod back to their initial positions in opposite directions, so that they completely leave the rotational motion envelope area of ​​the positive and negative rotation axes.

[0010] If the tube to be tested is determined to be in the forward state, it is directly output to the next process; if the tube to be tested is determined to be in the reverse state, the swing cylinder is started and drives the forward and reverse rotation shaft to rotate 180° in place, which drives the tube to be tested to rotate synchronously to correct it to the forward state, and then it is fed through the first through hole.

[0011] Preferably, the displacement difference to be detected when the catheter to be tested enters the forward or reverse rotation axis specifically includes: the outer diameter or step size of the two ends of the catheter to be tested are different, which causes the catheter to be tested to reach the limit position at different times when it is pushed into the internal cavity of the forward or reverse rotation axis, thereby forming the displacement difference to be detected.

[0012] Preferably, the control system determines the positive or negative state of the catheter to be tested based on the displacement data, specifically by: the control system having a pre-set positive displacement acceptable threshold; the control system comparing the read displacement data with the positive displacement acceptable threshold; if the displacement data is within the preset range, it is determined to be in a positive state; if the displacement data exceeds the tolerance, it is determined to be in a negative state.

[0013] Preferably, the oscillating cylinder starting and driving the forward and reverse rotating shaft to rotate 180° in place specifically includes: during the rotation of the forward and reverse rotating shaft by 180°, the forward and reverse rotating shaft cover plate, which is attached to the opening of the forward and reverse rotating shaft, always closes and limits the tube to be tested, preventing the tube to be tested from leaving the forward and reverse rotating shaft.

[0014] The second aspect of the present invention provides a catheter forward and reverse error prevention device for implementing a catheter forward and reverse error prevention method as described in the first aspect of the present invention, comprising a forward and reverse rotation mechanism fixing plate, wherein a detection component is provided on one side of the forward and reverse rotation mechanism fixing plate, and a rotation correction component is provided on the other side of the forward and reverse rotation mechanism fixing plate.

[0015] The detection component includes a drive cylinder and a displacement sensor, with the displacement sensor disposed at the power output end of the drive cylinder.

[0016] The rotary correction assembly includes a swing cylinder, the power output end of which is connected to a positive and negative rotation shaft, and the positive and negative rotation shaft has a chamber structure inside.

[0017] The detection end of the displacement sensor is positioned opposite to the opening end of the chamber structure, and the detection component and the rotation correction component are respectively fixed to the side wall of the fixing plate of the forward and reverse rotation mechanism.

[0018] Preferably, the positive and negative rotation mechanism fixing plate is fixedly connected to the side wall of the positive and negative detection cylinder fixing plate, the driving cylinder is set on the positive and negative detection cylinder fixing plate and connected to the detection fixing plate, the displacement sensor is fixedly connected to the side wall of the detection fixing plate by the mounting bracket, and the front end of the displacement sensor is connected to the detection round bar.

[0019] Preferably, the rotation correction assembly further includes a forward and reverse rotation cylinder fixing plate and a forward and reverse rotation shaft fixing plate. The forward and reverse rotation cylinder fixing plate is fixedly connected to the side wall of the forward and reverse rotation mechanism fixing plate. The swing cylinder is fixedly connected to the side wall of the forward and reverse rotation cylinder fixing plate. The forward and reverse rotation shaft fixing plate is disposed on the side wall of the swing cylinder away from the forward and reverse rotation cylinder fixing plate. The swing cylinder is fixedly installed on the surface of the forward and reverse rotation cylinder fixing plate.

[0020] Preferably, a forward and reverse rotation shaft guide plate is provided in front of the swing cylinder, and a forward and reverse rotation shaft pad is connected to the front end of the forward and reverse rotation shaft guide plate. The power output shaft of the swing cylinder passes through the forward and reverse rotation shaft fixing plate, the forward and reverse rotation shaft guide plate and the forward and reverse rotation shaft pad in sequence and is fixedly connected to the forward and reverse rotation shaft.

[0021] Preferably, the forward and reverse rotation shaft is a U-shaped groove structure with an opening on one side. Both the upper and lower ends of the forward and reverse rotation shaft are fixed with forward and reverse rotation shaft cover plates by bolts and countersunk holes. The forward and reverse rotation shaft cover plates and the inner sidewall of the forward and reverse rotation shaft together form the chamber structure for accommodating the catheter.

[0022] Preferably, a first through hole is provided at the center of the guide plate of the forward and reverse rotation shaft, and a second through hole is provided at the center of the side wall of the forward and reverse rotation shaft.

[0023] The above solution achieves the following beneficial technical effects:

[0024] This invention measures the linear displacement difference generated when the guide tube is pushed into the internal cavity of the rotating shaft using a displacement sensor and a detection rod. The different dimensions at the two ends of the guide tube will result in different depths of entry into the cavity. The control system compares the displacement data read with a pre-set acceptable range to determine whether it is in the forward or reverse state. The error prevention method of mechanical limit combined with linear displacement measurement replaces the complex visual recognition system. It can determine the forward or reverse state of the guide tube during the tube feeding process and rotate it to correct it, avoiding quality problems such as the production of defective parts after pressing.

[0025] This invention utilizes a swing cylinder to drive a forward and reverse rotating shaft to perform a 180° flipping motion in place to correct a reversed state. The forward and reverse rotating shaft adopts a U-shaped groove structure with an opening on one side. A forward and reverse rotating shaft cover plate is fixedly connected to the opening of the forward and reverse rotating shaft by bolts. The forward and reverse rotating shaft cover plate and the inner sidewall of the forward and reverse rotating shaft together form a closed space to accommodate the conduit to be tested. During the flipping and correction process of the forward and reverse rotating shaft, the forward and reverse rotating shaft cover plate restricts the radial movement range of the conduit to be tested, preventing the conduit to be tested from falling into the equipment due to gravity and causing mechanical jamming, which helps to maintain the stability of the equipment.

[0026] This invention integrates the detection component and the rotation correction component on both sides of the fixed plate of the forward and reverse rotation mechanism. The center of the forward and reverse rotation shaft guide plate has a first through hole that runs longitudinally through it. The forward and reverse rotation shaft flips inside the first through hole. When the forward and reverse rotation shaft completes its action and rotates to the longitudinal position, the opening faces downward. The internal guide tube to be detected directly passes through the first through hole and falls downward to enter the next process. The direction detection, direction correction and material unloading actions are concentrated in the same mechanical station, reducing the additional material flow and handling, which is conducive to improving the overall work efficiency and reducing the labor intensity of workers. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention;

[0028] Figure 2 This is a partial structural diagram of the rotary correction component of the present invention;

[0029] Figure 3 This is a partial structural diagram of the detection component of the present invention;

[0030] Figure 4 This is a partial structural diagram of the detection component of the present invention.

[0031] The components include: 1. Forward and reverse rotation mechanism fixing plate; 2. Forward and reverse rotation cylinder fixing plate; 3. Forward and reverse rotation shaft fixing plate; 4. Forward and reverse detection cylinder fixing plate; 5. Forward and reverse rotation shaft guide plate; 6. Forward and reverse rotation shaft pad; 7. Forward and reverse rotation shaft; 8. Forward and reverse rotation shaft cover plate; 9. Detection fixing plate; 10. First through center hole; 11. Second through center hole; 12. Countersunk hole; 13. Swing cylinder; 14. Mounting bracket; 15. Displacement sensor; 16. Detection round bar. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-3 This invention provides a catheter forward / reverse error prevention method, comprising the following steps:

[0034] The catheter to be tested is pushed axially into the chamber inside the positive and negative rotation shaft 7 for positioning. When the catheter to be tested enters the positive and negative rotation shaft 7 in the positive or negative direction, a displacement difference to be tested is formed.

[0035] The drive cylinder pushes the displacement sensor 15 to extend in the direction of the forward and reverse rotation axis 7, so that the detection rod 16 set at the front end of the displacement sensor 15 contacts the exposed end face of the tube to be detected and reads the corresponding displacement data. The control system determines the forward and reverse state of the tube to be detected based on the displacement data.

[0036] After the displacement sensor 15 reads the displacement data, the drive cylinder pulls the displacement sensor 15 and the detection rod 16 back to their initial positions in the opposite direction, so that they completely leave the rotational motion envelope area of ​​the positive and negative rotation axes 7.

[0037] If the guide tube to be tested is determined to be in the forward state, it is directly output to the next process; if the guide tube to be tested is determined to be in the reverse state, the swing cylinder 13 is started and drives the forward and reverse rotation shaft 7 to rotate 180° in place, which drives the guide tube to be tested to rotate synchronously to correct it to the forward state, and then it is fed through the first through hole 10.

[0038] Specifically, the external mechanism sends the catheter to be tested into the cavity inside the rotating shaft 7. Due to the inconsistency in the outer contour or size of the two ends of the catheter, when the catheter enters the rotating shaft 7 in a forward or reverse state, the position of the catheter being blocked by the internal obstruction changes, resulting in a difference in the length of the catheter exposed outside the rotating shaft 7, generating different displacement data. During detection, the drive cylinder moves, causing the displacement sensor 15 and the detection rod 16 to move closer to the rotating shaft 7. After the detection rod 16 contacts the exposed end face of the catheter, the displacement sensor 15 acquires the current displacement value and transmits the displacement value to the control system.

[0039] The control system has a built-in judgment logic. Based on the received displacement value, the control system determines whether the tube to be tested is in the forward or reverse state. After the data reading is completed, the drive cylinder drives the displacement sensor 15 and the detection rod 16 back to the initial position and out of the action area of ​​the forward and reverse rotation shaft 7. This avoids mechanical interference between the displacement sensor 15 and the detection rod 16 and the forward and reverse rotation shaft 7 during subsequent flipping. When the tube to be tested is determined to be in the reverse state, the swing cylinder 13 directly drives the forward and reverse rotation shaft 7 to rotate 180° in the original position. The tube to be tested flips synchronously with the forward and reverse rotation shaft 7 to change to the forward state. The in-situ flipping operation eliminates the process of taking out the tube to be tested and reversing its direction, avoids manual secondary adjustment, and reduces the labor intensity of workers.

[0040] Please see Figures 1-4 The displacement difference to be detected when the catheter to be tested enters the rotating shaft 7 in the forward or reverse direction specifically includes: the outer diameter or step size difference between the two ends of the catheter to be tested, which causes the catheter to be tested to reach the limit position differently when it is pushed into the internal cavity of the rotating shaft 7 in the forward or reverse direction, thus forming the displacement difference to be detected.

[0041] Specifically, the shape of the catheter under test is not completely symmetrical front to back. The external diameter or step position of the two ends of the catheter under test is different. When the catheter under test enters the cavity inside the rotating shaft 7, the limiting step or abutment surface inside the rotating shaft 7 will block the catheter under test from moving forward. Because the two ends of the catheter under test are different, the timing of the outer surface of the catheter under test touching the limiting step inside the rotating shaft 7 is different, and the position where the catheter under test stops is also different. This causes the end face of the catheter under test outside the rotating shaft 7 to have a different position. The difference in the physical size of the catheter under test is converted into a difference in linear displacement that can be directly measured. Using displacement measurement does not require complex visual recognition equipment, which helps to reduce the manufacturing cost of the equipment.

[0042] Please see Figures 1-4The control system determines the positive or negative state of the duct to be tested based on displacement data. Specifically, the control system has a pre-set positive displacement acceptable threshold. The control system compares the displacement data it reads with the positive displacement acceptable threshold. If the displacement data is within the preset range, it is determined to be in a positive state. If the displacement data exceeds the tolerance, it is determined to be in a negative state.

[0043] Specifically, the control system pre-inputs a displacement range value representing the forward orientation. After receiving the read displacement data, the control system compares the read displacement data with the pre-input displacement range value. If the read displacement data is within the preset range, it means that the current insertion depth of the tube under test conforms to the forward placement depth, and the control system determines that the tube under test is in the forward orientation. If the read displacement data exceeds the preset range, it means that the insertion depth of the tube under test does not conform to the forward placement standard, and the control system determines that the tube under test is in the reverse orientation. Using a range comparison of numerical intervals allows for a certain dimensional deviation in the tube under test itself during manufacturing, reducing the possibility of misjudgment by the control system.

[0044] Please see Figures 1-4 The swing cylinder 13 starts and drives the forward and reverse rotation shaft 7 to rotate 180° in place. Specifically, during the rotation of the forward and reverse rotation shaft 7, the forward and reverse rotation shaft cover plate 8, which is set at the opening of the forward and reverse rotation shaft 7, always closes and limits the tube to be tested, preventing the tube to be tested from leaving the forward and reverse rotation shaft 7.

[0045] Specifically, when the control system determines that the guide tube to be tested is in a reverse state, the swing cylinder 13 receives the action signal and starts working. The swing cylinder 13 outputs rotational power, driving the forward and reverse rotation shaft 7 to rotate 180° in place. During the rotation of the forward and reverse rotation shaft 7, the opening direction of the forward and reverse rotation shaft 7 will change. The guide tube to be tested is subjected to gravity or centrifugal force generated by rotation, and there is a possibility that it will fall out of the opening of the forward and reverse rotation shaft 7. The forward and reverse rotation shaft 7 has a U-shaped groove structure. The forward and reverse rotation shaft cover plate 8 is fixed at the opening position of the forward and reverse rotation shaft 7. The forward and reverse rotation shaft cover plate 8 and the inner sidewall of the forward and reverse rotation shaft 7 together form a closed space to accommodate the guide tube to be tested. During the rotation of the forward and reverse rotation shaft 7, the forward and reverse rotation shaft cover plate 8 physically blocks the guide tube to be tested, restricts the radial movement range of the guide tube to be tested, and ensures that the guide tube to be tested always stays inside the forward and reverse rotation shaft 7. The closed limiting method prevents the guide tube to be tested from falling out during the rotation and correction process, and avoids the guide tube to be tested falling into the equipment and causing mechanical jamming.

[0046] Please see Figures 1-4A conduit forward and reverse error prevention device includes a forward and reverse rotation mechanism fixing plate 1. A detection component is provided on one side of the forward and reverse rotation mechanism fixing plate 1, and a rotation correction component is provided on the other side of the forward and reverse rotation mechanism fixing plate 1. The detection component includes a drive cylinder and a displacement sensor 15. The displacement sensor 15 is located at the power output end of the drive cylinder. The rotation correction component includes a swing cylinder 13. The power output end of the swing cylinder 13 is connected to a forward and reverse rotation shaft 7. A chamber structure is opened inside the forward and reverse rotation shaft 7. The detection end of the displacement sensor 15 is arranged opposite to the opening end of the chamber structure. The detection component and the rotation correction component are respectively fixed to the side wall of the forward and reverse rotation mechanism fixing plate 1.

[0047] Specifically, the forward and reverse rotation mechanism fixing plate 1 serves as the installation support structure for the device, providing a mounting support base for the detection component and the rotation correction component. The detection component and the rotation correction component are respectively arranged on both sides of the forward and reverse rotation mechanism fixing plate 1, physically isolating the space for linear detection action from the space for flipping correction action, reducing the probability of mechanical interference when the cylinder moves. During measurement, the drive cylinder provides linear thrust, driving the displacement sensor 15 to move linearly towards the opening end of the chamber structure of the forward and reverse rotation shaft 7. The detection end of the displacement sensor 15 is set opposite to the opening end of the chamber structure, allowing the displacement sensor 15 to directly read the end face position value of the tube to be tested inside the forward and reverse rotation shaft 7, keeping the measuring axis of the displacement sensor 15 collinear with the central axis of the tube to be tested, reducing errors caused by measurement deviation angles, and improving the accuracy of displacement readings. During correction, the swing cylinder 13 provides rotational power, driving the forward and reverse rotation shaft 7 to flip. Integrating the direction detection function and the direction correction function on the same forward and reverse rotation mechanism fixing plate 1 improves overall work efficiency.

[0048] Please see Figures 1-3 The positive and negative rotation mechanism fixing plate 1 has a positive and negative detection cylinder fixing plate 4 fixedly connected to its side wall. The drive cylinder is set on the positive and negative detection cylinder fixing plate 4 and connected to the detection fixing plate 9. The displacement sensor 15 is fixedly connected to the side wall of the detection fixing plate 9 through the mounting bracket 14. The front end of the displacement sensor 15 is connected to the detection round rod 16.

[0049] Specifically, the forward and reverse detection cylinder fixing plate 4 is installed on the side wall of the forward and reverse rotation mechanism fixing plate 1, providing a fixed mounting base for the drive cylinder. When the drive cylinder is working, the power output end of the drive cylinder pushes the detection fixing plate 9 to move linearly. The detection fixing plate 9 and the mounting bracket 14 connect the displacement sensor 15 to the front of the drive cylinder, so that the displacement sensor 15 moves synchronously with the drive cylinder. The detection rod 16 connected to the front end of the displacement sensor 15 serves as the actual contact component. During the measurement process, the detection rod 16 directly contacts the end face of the tube to be tested. The detection rod 16 replaces the detection probe of the displacement sensor 15 to contact the tube to be tested, avoiding scratches on the displacement sensor 15 by the edge of the tube to be tested, which helps protect the measuring element. The connection method of the multi-layer fixing plate makes the displacement sensor 15 stable during movement, reducing the measurement deviation caused by vibration.

[0050] Please see Figures 1-3 The rotation correction assembly also includes a forward and reverse rotation cylinder fixing plate 2 and a forward and reverse rotation shaft fixing plate 3. The forward and reverse rotation cylinder fixing plate 2 is fixedly connected to the side wall of the forward and reverse rotation mechanism fixing plate 1. The swing cylinder 13 is fixedly connected to the side wall of the forward and reverse rotation cylinder fixing plate 2. The forward and reverse rotation shaft fixing plate 3 is located on the side wall of the swing cylinder 13 away from the forward and reverse rotation cylinder fixing plate 2. The swing cylinder 13 is fixedly installed on the surface of the forward and reverse rotation cylinder fixing plate 2.

[0051] Specifically, the forward and reverse rotation cylinder fixing plate 2 fixes the swing cylinder 13 to the forward and reverse rotation mechanism fixing plate 1. When the swing cylinder 13 outputs rotational power to flip the forward and reverse rotation shaft 7, the swing cylinder 13 housing itself will bear the reverse torque force. The forward and reverse rotation cylinder fixing plate 2 provides support for the swing cylinder 13 to prevent the swing cylinder 13 from shifting position or shaking during operation. The forward and reverse rotation shaft fixing plate 3 is set on the side of the swing cylinder 13 away from the forward and reverse rotation cylinder fixing plate 2, providing front-end support for the power output end of the swing cylinder 13 or the forward and reverse rotation shaft 7, improving the stress situation of the rotating parts in a cantilever state, and thus playing an auxiliary limiting role for the peripheral structure of the output end of the swing cylinder 13. The modular fixing plate arrangement makes the installation positions of the detection component and the rotation correction component independent of each other. If the drive cylinder or the swing cylinder needs to be maintained separately in the future, the operator can remove the corresponding fixing plate to complete the replacement of a single component, reducing the difficulty of equipment maintenance.

[0052] Please see Figures 1-3 A forward and reverse rotation shaft guide plate 5 is provided in front of the swing cylinder 13. A forward and reverse rotation shaft pad 6 is connected to the front end of the forward and reverse rotation shaft guide plate 5. The power output shaft of the swing cylinder 13 passes through the forward and reverse rotation shaft fixing plate 3, the forward and reverse rotation shaft guide plate 5 and the forward and reverse rotation shaft pad 6 in sequence and is fixedly connected to the forward and reverse rotation shaft 7.

[0053] Specifically, the forward and reverse rotation shaft guide plate 5 is positioned in front of the swing cylinder 13 to provide rotational guidance for the power output shaft of the swing cylinder 13. The forward and reverse rotation shaft pad 6 is positioned between the forward and reverse rotation shaft guide plate 5 and the forward and reverse rotation shaft 7 to fill the gap and transmit support force. The power output shaft of the swing cylinder 13 passes through the forward and reverse rotation shaft fixing plate 3, the forward and reverse rotation shaft guide plate 5, and the forward and reverse rotation shaft pad 6 to transmit power to the forward and reverse rotation shaft 7.

[0054] Please see Figure 4 The positive and negative rotating shaft 7 is a U-shaped groove structure with an opening on one side. Both the upper and lower ends of the positive and negative rotating shaft 7 are locked and fixed with the positive and negative rotating shaft cover plate 8 by bolts and countersunk holes 12. The positive and negative rotating shaft cover plate 8 and the inner side wall of the positive and negative rotating shaft 7 together form a chamber structure for accommodating the catheter.

[0055] Specifically, the main body of the forward and reverse rotating shaft 7 adopts a U-shaped groove structure design. The forward and reverse rotating shaft cover plate 8 is installed on the upper and lower opening end faces of the forward and reverse rotating shaft 7 by bolts. The bolts are locked with countersunk holes 12, so that the bolt heads are hidden inside the surface of the forward and reverse rotating shaft cover plate 8. The countersunk structure avoids the bolt heads from protruding from the surface, reducing the probability of mechanical interference between the forward and reverse rotating shaft 7 and other surrounding parts during the flipping process. The forward and reverse rotating shaft cover plate 8 and the inner side wall of the forward and reverse rotating shaft 7 together form a chamber structure. The chamber structure contains and confines the tube to be tested inside, preventing the tube to be tested from falling off during the flipping action.

[0056] Please see Figures 1-4 A first through hole 10 is provided at the center of the guide plate 5 for the forward and reverse rotation shafts, and a second through hole 11 is provided at the center of the side wall of the forward and reverse rotation shaft 7.

[0057] Specifically, the first through hole 10, located at the center of the guide plate 5 for the forward and reverse rotation shafts, extends longitudinally through the shaft, providing space for the rotation of the forward and reverse rotation shaft 7. The shaft rotates within the first through hole 10. When the shaft completes directional correction and rotates to a longitudinal position, its opening faces downwards, and the guide tube to be tested inside loses lateral support. The guide tube falls downwards through the first through hole 10 and enters the next working stage. The material is fed directly using the rotation combined with the longitudinal through hole. The second through hole 11, located at the center of the side wall of the forward and reverse rotation shaft 7, extends laterally through the side wall of the shaft, connecting the internal chamber structure of the shaft with the external space. When the guide tube to be tested is pushed into the shaft, the second through hole 11 can expel the compressed air inside the chamber structure, preventing air pressure resistance from affecting the smoothness of the guide tube's entry. At the same time, the second through hole 11 can also serve as an observation hole for external sensors to detect whether the guide tube is in place, ensuring the reliability of the overall structure's operation.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preventing errors in catheter orientation, characterized in that, Includes the following steps: The catheter to be tested is pushed axially into the chamber inside the positive and negative rotation shaft (7) for positioning. When the catheter to be tested enters the positive and negative rotation shaft (7) in the positive or negative direction, a displacement difference to be tested is formed. The drive cylinder pushes the displacement sensor (15) to extend in the direction of the positive and negative rotation axis (7), so that the detection rod (16) set at the front end of the displacement sensor (15) contacts the exposed end face of the tube to be detected and reads the corresponding displacement data. The control system determines the positive and negative state of the tube to be detected based on the displacement data. After the displacement sensor (15) reads the displacement data, the driving cylinder pulls the displacement sensor (15) and the detection rod (16) back to the initial position in the opposite direction, so that they completely leave the rotational motion envelope area of ​​the positive and negative rotation axes (7); If the test tube is determined to be in the positive state, the test tube is directly output to the next process; if the test tube is determined to be in the negative state, the swing cylinder (13) is started and drives the positive and negative rotating shaft (7) to rotate 180° in place, which drives the test tube to rotate synchronously to correct to the positive state, and then the material is fed through the first through hole (10).

2. The catheter forward / reverse error prevention method according to claim 1, characterized in that, The displacement difference to be detected when the catheter to be tested enters the forward or reverse rotation axis (7) in either the forward or reverse direction specifically includes: The outer diameter or step size of the two ends of the catheter to be tested are different, which causes the catheter to be tested to reach the limit position differently when it is pushed into the internal cavity of the rotating shaft (7) in the forward or reverse direction, thus forming the displacement difference to be tested.

3. The catheter forward / reverse error prevention method according to claim 1, characterized in that, The control system determines the positive and negative states of the catheter under test based on the displacement data, specifically including: The control system has a preset positive displacement acceptable threshold. The control system compares the displacement data it reads with the positive displacement acceptable threshold. If the displacement data is within the preset range, it is determined to be in a positive state. If the displacement data exceeds the tolerance, it is determined to be in a reverse state.

4. The catheter forward / reverse error prevention method according to claim 1, characterized in that, The activation of the swing cylinder (13) and the driving of the forward and reverse rotation shafts (7) to rotate 180° in place specifically include: During the 180° rotation of the forward and reverse rotation shaft (7), the forward and reverse rotation shaft cover plate (8) which is attached to the opening of the forward and reverse rotation shaft (7) always closes and limits the catheter to be tested, preventing the catheter to be tested from leaving the forward and reverse rotation shaft (7).

5. A device for preventing the forward and reverse rotation of a catheter, characterized in that, To implement a catheter forward and reverse error prevention method as described in any one of claims 1-4, a forward and reverse rotation mechanism fixing plate (1) is provided, a detection component is provided on one side of the forward and reverse rotation mechanism fixing plate (1), and a rotation correction component is provided on the other side of the forward and reverse rotation mechanism fixing plate (1); The detection component includes a drive cylinder and a displacement sensor (15), wherein the displacement sensor (15) is disposed at the power output end of the drive cylinder; The rotary correction assembly includes a swing cylinder (13), the power output end of which is connected to a positive and negative rotation shaft (7), and the positive and negative rotation shaft (7) has a chamber structure inside; The detection end of the displacement sensor (15) is positioned opposite to the opening end of the chamber structure, and the detection component and the rotation correction component are respectively fixed to the side wall of the forward and reverse rotation mechanism fixing plate (1).

6. A catheter forward / reverse error prevention device according to claim 5, characterized in that, The positive and negative rotation mechanism fixing plate (1) is fixedly connected to the positive and negative detection cylinder fixing plate (4) on its side wall. The driving cylinder is set on the positive and negative detection cylinder fixing plate (4) and connected to the detection fixing plate (9). The displacement sensor (15) is fixedly connected to the side wall of the detection fixing plate (9) through the mounting bracket (14). The front end of the displacement sensor (15) is connected to the detection round rod (16).

7. A conduit forward / reverse error prevention device according to claim 5, characterized in that, The rotation correction assembly also includes a forward and reverse rotation cylinder fixing plate (2) and a forward and reverse rotation shaft fixing plate (3). The forward and reverse rotation cylinder fixing plate (2) is fixedly connected to the side wall of the forward and reverse rotation mechanism fixing plate (1). The swing cylinder (13) is fixedly connected to the side wall of the forward and reverse rotation cylinder fixing plate (2). The forward and reverse rotation shaft fixing plate (3) is located on the side wall of the swing cylinder (13) away from the forward and reverse rotation cylinder fixing plate (2). The swing cylinder (13) is fixedly installed on the surface of the forward and reverse rotation cylinder fixing plate (2).

8. A conduit forward / reverse error prevention device according to claim 7, characterized in that, A forward and reverse rotation shaft guide plate (5) is provided in front of the swing cylinder (13). A forward and reverse rotation shaft pad (6) is connected to the front end of the forward and reverse rotation shaft guide plate (5). The power output shaft of the swing cylinder (13) passes through the forward and reverse rotation shaft fixing plate (3), the forward and reverse rotation shaft guide plate (5) and the forward and reverse rotation shaft pad (6) in sequence and is fixedly connected to the forward and reverse rotation shaft (7).

9. A catheter forward / reverse error prevention device according to claim 5, characterized in that, The positive and negative rotating shaft (7) is a U-shaped groove structure with an opening on one side. Both the upper and lower ends of the positive and negative rotating shaft (7) are locked with positive and negative rotating shaft cover plates (8) by bolts and countersunk holes (12). The positive and negative rotating shaft cover plates (8) and the inner side wall of the positive and negative rotating shaft (7) together form the chamber structure for accommodating the catheter.

10. A catheter forward / reverse error prevention device according to claim 8, characterized in that, The guide plate (5) of the positive and negative rotation shafts has a first through hole (10) at its center, and the side wall of the positive and negative rotation shaft (7) has a second through hole (11) at its center.

Images