A flexible catheter sample taking tool and a sample taking method thereof

Abstract

The present invention discloses a flexible catheter sample taking tool and a method for taking the sample, comprising at least one standard connection unit and a plurality of quick locking units, wherein one end of the quick locking unit is sleeved in a flange, and the other end is movably connected to a standard connection unit, wherein the standard connection units are movably connected to each other to form a chain structure having a single chain or multiple chains, and the standard connection units at the ends of the chain structure are movably connected to quick locking units. The present invention divides the pipeline size constituting the catheter space into standard connection units of equal length, and uses a quick locking unit with adjustable length to connect with a flange or a pipe joint at the joint of the pipeline, and finally connects with the standard unit in the pipeline to form a complete catheter passage replacement sample, which can accurately and quickly realize the shaping and curing of the catheter sample, thereby improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation pipeline assembly, and in particular relates to a flexible catheter real sample taking tool and a real sample taking method. Background Art

[0002] Aluminum alloy welded conduits are commonly used in aircraft fuel pipelines, and the diameters are mostly between Φ28-Φ80. However, due to the small space of the aircraft structure and the many factors that need to be considered during the conduit assembly process, the traditional practice is to wait until most of the system components are installed before starting the conduit sampling work. The traditional conduit sampling process is as follows: Figure 1 As shown in the figure, this process has the following disadvantages: (1) It is impossible to produce a catheter that meets the assembly requirements according to the dimensions on the drawing during the manufacturing of the actual sample of the catheter, and the actual sample needs to be repeatedly adjusted during the sampling process; (2) The adjustment process generally involves cutting the catheter and re-welding it, but the welding deformation is uncontrollable, and it is impossible to achieve precise compliance with the assembly requirements through a single adjustment. It often requires repeated adjustments and repeated comparisons, which is time-consuming and labor-intensive; (3) If major adjustments are required during the sampling and trial assembly process, it is often necessary to re-prepare the catheter raw materials and some parts, standard parts, etc., which will lengthen the cycle for determining the actual sample of the catheter.

[0003] Therefore, the accuracy and cycle of catheter sample preparation are critical factors affecting the progress of catheter manufacturing. During aircraft development, this impact is more prominent and even affects the overall progress of model development. How to accurately and quickly achieve catheter sample shaping and curing is the main problem solved by the present invention. Summary of the invention

[0004] In view of the above-mentioned defects, the present invention aims to provide a flexible catheter sample taking tool and a sample taking method, by which the catheter sample can be accurately and quickly shaped and solidified, thereby completing the sample taking and the design and manufacture of subsequent positioning welding process technology equipment.

[0005] In order to achieve the above technical objectives, the following technical solutions are adopted: A flexible catheter sample taking tool comprises at least one standard connection unit and a plurality of quick locking units, wherein one end of the quick locking unit is sleeved in a flange, and the other end is movably connected to the standard connection unit, the standard connection units are movably connected to each other to form a chain structure with a single chain or multiple chains, and the standard connection units at the ends of the chain structure are movably connected to the quick locking units respectively.

[0006] Furthermore, the quick locking unit includes a locking body, a joint, an axle pin, a locking nut and a rubber pad; the locking body is a cylindrical structure formed by two locking plates assembled together, one end of the two locking plates is hinged together by an axle pin, and the other end is opened outward and provided with a screw hole; the joint is arranged in the locking body, the tail end of the joint is rotatably sleeved on the axle pin and can swing around the axle pin between the two locking plates, and the head end of the joint is movably connected to the standard connection unit; the locking nuts are respectively threadedly connected to the threaded holes of the two locking plates and can push the head end of the joint to swing; the flange is sleeved outside the hinged part of the locking body; the rubber pad is arranged between the flange and the locking body.

[0007] Furthermore, the joint of the quick locking unit is a spherical protrusion or a spherical groove.

[0008] Furthermore, the connection between the standard connection unit at the end of the chain structure formed by the standard connection unit and the joint of the quick locking unit is movably connected through a spherical protrusion and a spherical groove that cooperate with each other; the adjacent standard connection units in the middle part of the chain structure formed by the standard connection unit are movably connected through a spherical protrusion and a spherical groove that cooperate with each other.

[0009] A method for obtaining a sample from a flexible catheter comprises the following steps: S1: The process plans the assembly diagram of the catheter sample according to the design drawing requirements; S2: Workers pre-install standard connection units and quick locking units according to the drawing requirements; S3: Test-install the pre-assembled sample making tool on the machine and fix the quick locking unit in the flange or pipe joint; S4: According to the on-board test installation situation, adjust the spatial position of the standard connection unit and lock the connection node with a locking nut; S5: After determining the relevant assembly relationship, fine-tune the standard connection unit under stress-free conditions; S6: Check whether the size is qualified; S7: If the size is qualified, the sample taking tool is solidified, and the catheter sample taking work is completed; if the size is not qualified, return to S5 to fine-tune the standard connection unit until the size is qualified, and the catheter sample taking work is completed.

[0010] The beneficial effects achieved by the present invention are: Compared with the prior art, the present invention designs a set of standardized and modular flexible assembly tools by analyzing the structure of the catheter and combining the process of taking and manufacturing the actual sample of the catheter. The pipeline size constituting the catheter space is divided into standard connection units of equal length. The quick locking unit with adjustable length is connected with the flange or pipe joint at the joint of the pipeline, and finally connected with the standard unit in the pipeline to form a complete catheter passage replacement sample. Among them, the standard connection units are movably connected to each other and movably connected with the quick locking unit. The movable adjustable angle can meet the catheter requirements under the minimum bending radius, and the quick locking unit can adjust a certain length in the flange. Therefore, for the actual sample of the catheter completed by using the standard simulation unit, the angle and length of the catheter can be adjusted according to the actual situation of the on-site assembly, without the process of destroying its original characteristics such as welding. After the preparation work is completed, it can be used for the production and manufacturing of the catheter. At the same time, the standard connection unit and the quick locking unit are designed in a variety of ways, which can realize a variety of connection methods, flexibly adapt to different connection requirements, and ensure the efficient connection of the flexible catheter in various sample taking and manufacturing processes. The invention has the advantages of being able to realize one-time installation and testing, rapid shaping and curing, and rapid and accurate production of catheter samples, and can significantly shorten the sample production cycle in the catheter development process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be described below in conjunction with the accompanying drawings.

[0012] Attached Figure 1 It is a flow chart of the traditional method of catheter sampling in the present invention.

[0013] Attached Figure 2 It is a schematic structural diagram of a flexible catheter sample taking tool of the present invention.

[0014] Attached Figure 3 It is a diagrammatic schematic diagram of the locking unit described in the present invention.

[0015] Attached Figure 4 It is a schematic diagram of the A-type locking unit described in the present invention.

[0016] Attached Figure 5 It is a schematic diagram of the B-type locking unit described in the present invention.

[0017] Attached Figure 6 It is a cross-sectional view of the A-type connection unit described in the present invention.

[0018] Attached Figure 7 It is a schematic diagram of the B-type connection unit described in the present invention.

[0019] Attached Figure 8 It is a schematic diagram of the C-type connection unit described in the present invention.

[0020] Attached Fig. 9It is a schematic diagram of the D-type connection unit described in the present invention.

[0021] Attached Fig.10 The present invention is a flowchart of the use of a flexible catheter real sample taking tool.

[0022] In the figure: 1. standard connection unit; 2. quick locking unit; 11. connection body; 12. ball head support; 13. blind hole; 14. guide groove; 15. annular groove; 21. locking body; 22. joint; 23. shaft pin; 24. rubber pad; 221. spherical groove joint; 222. spherical convex head joint; 3. flange. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 2 As shown, a flexible catheter sample taking tool includes at least one standard connection unit 1 and a plurality of quick locking units 2, wherein one end of the quick locking unit 2 is sleeved in a flange 3, and the other end is movably connected to the standard connection unit 1, and the standard connection units 1 are movably connected to each other to form a chain structure with a single chain or multiple chains, and the standard connection units 1 at the ends of the chain structure are movably connected to the quick locking units 2 respectively.

[0025] like Figure 3 As shown, the quick locking unit 2 includes a locking body 21, a joint 22, an axle pin 23, a locking nut and a rubber pad 24. The locking body 21 is a cylindrical structure formed by two locking plates assembled together. One end of the two locking plates is hinged together by the axle pin 23, and the other end is opened outward and provided with a screw hole; the joint 22 is arranged in the locking body 21, and the tail end of the joint 22 is rotatably sleeved on the axle pin 23 and can swing between the two locking plates around the axle pin 23, and the head end of the joint 22 is movably connected to the standard connection unit 1; the locking nuts are respectively threadedly connected in the threaded holes of the two locking plates and can push the head end of the joint 22 to swing; the flange 3 is sleeved outside the hinged part of the locking body 21; the rubber pad 24 is arranged between the flange 3 and the locking body 21.

[0026] like Figure 4-5As shown, the quick locking unit 2 is divided into an A-type locking unit and a B-type locking unit according to the different shapes of the joint 22. The joint 22 of the A-type locking unit is a spherical groove joint 221, and the joint 22 of the B-type locking unit is a spherical convex head joint 222.

[0027] The working principle of the quick locking unit 2 is: by rotating the locking nut at the upper end of the locking body 21, the locking nut squeezes the joint 22, forcing the hinged part at the lower end of the locking body 21 to open, so that the rubber pad 24 set between the flange 3 and the locking body 21 squeezes the inner wall of the flange 3 outward, thereby completing the locking operation; after completing the actual sample taking work, loosen the locking nut, the upper end of the locking body 21 opens outward, and the lower end of the locking body 21 shrinks inward, so that the rubber pad 24 is separated from the inner wall of the flange 3, and the quick locking unit 2 is disconnected. The rubber pad 24 has eight pieces in total, which are symmetrically sleeved at the hinged part at the lower end of the locking body 21. The cylindrical structure range covering the locking body 21 is 254°, which can effectively lock the flange 3. The effective locking length is 12.5mm. Taking the flange length L as 30mm as an example, the quick locking unit 2 can be adjusted within the range of 17.5mm. The length from the axis pin 23 to the center of the joint 22 is 52 mm, so the flexible catheter sample taking tool can theoretically be used to take single-channel catheter samples with a length greater than 116.5 mm.

[0028] like Figure 6-9 As shown, the standard connection unit 1 includes a type A connection unit, a type B connection unit, a type C connection unit and a type D connection unit. In order to meet the requirements of sampling of various catheter channels, the type A connection unit is used as the basic version, and the type B connection unit, the type C connection unit and the type D connection unit are designed.

[0029] The A-type connecting unit includes a connecting body 11, a ball head support 12 extending upward from the top of the connecting body 11, and a cylindrical blind hole 13 is provided at the bottom; a guide groove 14 is provided at the opening of the blind hole 13 and an annular groove 15 is provided inside, and locking nuts are symmetrically provided on both sides of the connecting body 11, and the locking nuts pass through the connecting body 11 and fall into the annular groove 15 in the blind hole 13.

[0030] The B-type connection unit comprises a connection body 11 , and cylindrical blind holes 13 are respectively provided at the top and the bottom of the connection body 11 .

[0031] The C-shaped connection unit includes a connection body 11 , and ball head supports 12 extend outward from the top and bottom of the connection body 11 .

[0032] The D-type connection unit includes a connection body 11 , and the connection body 11 is a three-pronged ball head support 12 extending outward.

[0033] The working principles of the B-type connection unit, the C-type connection unit, and the D-type connection unit are the same as those of the A-type connection unit, and the following discussion will focus on the A-type connection unit.

[0034] The working principle of the A-type connection unit is as follows: the A-type connection unit has a ball head support 12 at one end and a cylindrical blind hole 13 at the other end. When connecting, the ball head support 12 of another connection body is installed into the cylindrical blind hole 13 through the guide groove 14 set at the opening of the blind hole 13. After determining the installation angle, the ball head of the ball head support 12 is locked and fixed with a locking nut, so that sampling can be completed at one time. The ball head diameter of the ball head support 12 is Φ12mm, and the diameter of the blind hole 13 is Φ11.7mm. Therefore, when connecting for the first time, it is necessary to overcome the interference of 0.15mm on one side, and then enter the non-interference space at the annular groove 15, so that the ball head support 12 will not fall off in a free state. At the same time, the angle of the ball head support 12 in the blind hole 13 is adjustable, and it can be adjusted within a cone range of 21.27° based on the center of the ball.

[0035] The length of the quick locking unit 2 in the present invention is 52 mm, the length of the standard connection unit 1 is 35 mm, the length of the flange 3 is 30 mm, and the effective locking length of the quick locking unit 2 is 12.5 mm. The adjustable length of the quick locking unit 2 in the flange 3 is 17.5 mm, so the formula for the corresponding actual sample length of the catheter is: L=52×2+12.5+N×35+17.5×2×x Where: N is the number of selected standard units, which is a positive integer; X is the adjustment coefficient, which is a natural number between 0 and 1.

[0036] In the following, various types of standard connection units 1 and quick locking units 2 are assembled and used according to flexible conduits of different designs. Embodiment 1

[0037] In order to simplify assembly and install quickly, the flexible conduit sample making tool adopts a combination of A-type locking unit + A-type connecting unit + B-type locking unit. One end is an A-type locking unit, the other end is a B-type locking unit, and the middle is an A-type connecting unit connected to each other. The lower ends of the A-type locking unit and the B-type locking unit are installed in the flange 3 for locking, and then the spherical convex joint 222 of the B-type locking unit is installed in the blind hole 13 of the A-type connecting unit, and the ball head support 12 of the A-type connecting unit is installed in the blind hole 13 of another A-type connecting unit. The ball head support 12 of the A-type connecting unit at the end of the connection is installed in the spherical groove joint 221 of the A-type locking unit. After determining the angle, the locking nut is used to lock and fix each connection node. Embodiment 2

[0038] The flexible conduit sample taking tool can also be a combination of an A-type locking unit + a C-type connecting unit + a B-type connecting unit + an A-type locking unit. Both ends are A-type locking units, the A-type locking unit is a spherical groove joint 221, the C-type connecting unit connected to the A-type locking units at both ends, and the C-type connecting unit and the B-type connecting unit are in the middle, and the ball head supports 12 at both ends of the C-type connecting unit are respectively connected to the blind holes 13 of the B-type connecting unit. Embodiment 3

[0039] Correspondingly, the flexible conduit sample taking tool can also be a combination of a B-type locking unit + a B-type connecting unit + a C-type connecting unit + a B-type locking unit. The two ends are B-type locking units, the B-type locking unit is a spherical convex joint 222, the B-type connecting unit connected to the B-type locking units at the two ends is a B-type connecting unit, and the middle is connected to the B-type connecting unit and the C-type connecting unit, and the blind holes 13 at the two ends of the B-type connecting unit are respectively connected to the ball head support 12 of the C-type connecting unit. Embodiment 4

[0040] In addition, in order to meet the sampling requirements of catheters with more than two spatial passages, when in use, a D-type connecting unit is used at the bifurcation point of the pipeline to ensure rapid sampling of the pipeline. The three ball head supports 12 extending from the D-type connecting unit are respectively connected to the blind holes 13 of the B-type connecting unit, and the remaining parts can be selected from any combination of embodiments one to three.

[0041] The process of the real sample preparation method of the flexible catheter real sample preparation tool of the present invention is as follows: Fig.10 shown.

[0042] S1: The process plans the assembly diagram of the catheter sample according to the design drawing requirements; S2: Workers pre-install standard connection units and quick locking units according to the drawing requirements; S3: Test-install the pre-assembled sample making tool on the machine and fix the quick locking unit in the flange or pipe joint; S4: According to the on-board test installation situation, adjust the spatial position of the standard connection unit and lock the connection node with a locking nut; S5: After determining the relevant assembly relationship, fine-tune the standard connection unit under stress-free conditions; S6: Check whether the size is qualified; S7: If the size is qualified, the sample taking tool is solidified, and the catheter sample taking work is completed; if the size is not qualified, return to S5 to fine-tune the standard connection unit until the size is qualified, and the catheter sample taking work is completed.

[0043] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0044] It should be noted that the terms "comprises," "includes," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, - or also includes elements that are inherent to such process, method, article, or apparatus.

[0045] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A flexible catheter sample taking tool, characterized in that: The invention comprises at least one standard connection unit (1) and a plurality of quick locking units (2), wherein one end of the quick locking unit (2) is sleeved in a flange (3) and the other end is movably connected to the standard connection unit (1), the standard connection units (1) are movably connected to each other to form a chain structure having a single chain or multiple chains, and the standard connection units (1) at the ends of the chain structure are movably connected to the quick locking units (2) respectively.

2. A flexible catheter sample taking tool according to claim 1, characterized in that: The quick locking unit (2) comprises a locking body (21), a joint (22), an axle pin (23), a locking nut and a rubber pad (24); the locking body (21) is a cylindrical structure formed by two locking plates assembled together, one end of the two locking plates are hinged together by the axle pin (23), and the other end is outwardly opened and provided with a screw hole; the joint (22) is arranged in the locking body (21), the tail end of the joint (22) is rotatably sleeved on the axle pin (23) and can swing around the axle pin (23) between the two locking plates, and the head end of the joint (22) is movably connected to the standard connection unit (1); the locking nuts are respectively threadedly connected to the threaded holes of the two locking plates and can push the head end of the joint (22) to swing; the flange (3) is sleeved outside the hinged portion of the locking body (21); and the rubber pad (24) is arranged between the flange (3) and the locking body (21).

3. A flexible catheter sample taking tool according to claim 2, characterized in that: The joint (22) of the quick locking unit (2) is a spherical protrusion or a spherical groove.

4. A flexible catheter sample taking tool according to claim 3, characterized in that: The connection between the standard connection unit (1) at the end of the chain structure formed by the standard connection unit (1) and the joint (22) of the quick locking unit (2) is movably connected through mutually matching spherical protrusions and spherical grooves; and the adjacent standard connection units (1) in the middle of the chain structure formed by the standard connection unit (1) are movably connected through mutually matching spherical protrusions and spherical grooves.

5. A method for obtaining a sample of a flexible catheter using the sample obtaining tool of claim 1, characterized in that: The following steps are involved: S1: The process plans the assembly diagram of the catheter sample according to the design drawing requirements; S2: Workers pre-install the standard connection unit (1) and the quick locking unit (2) according to the requirements of the drawings; S3: The pre-assembled sample taking tool is tested on the machine, and the quick locking unit (2) is fixed in the flange (3) or the pipe joint; S4: According to the on-board test installation situation, adjust the spatial position of the standard connection unit (1) and lock the connection node with a locking nut; S5: After determining the relevant assembly relationship, fine-tune the standard connection unit (1) under stress-free conditions; S6: Check whether the size is qualified; S7: If the size is qualified, the sample taking tool is solidified, and the catheter sample taking work is completed; if the size is not qualified, return to S5 to fine-tune the standard connection unit (1) until the size is qualified, and the catheter sample taking work is completed.

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