Layered testing equipment and testing method for multi-layer pipe

Abstract

The invention discloses a multi-layer pipe layering test device and a test method. The multi-layer pipe layering test device comprises a sample clamp part, a test operation part and a test data statistics part, the sample clamp part comprises a clamp fixing plate, a left clamping mechanism and a right clamping mechanism which are symmetrically arranged left and right are arranged on the clamp fixing plate, the left clamping mechanism is used for clamping and fixing a clamped part of the first pipe body layer, and the right clamping mechanism is used for clamping and fixing a clamped part of the second pipe body layer; the test operation part comprises a bottom plate, a front-back moving mechanism is arranged on the bottom plate, and the test data statistics part is installed on the front-back moving mechanism and is driven by the front-back moving mechanism to move front and back; the front-back testing mechanism comprises a probe and a tester, the probe is installed on the tester, and the probe faces forwards and points to a tested position of the sample piece; and the probe is used for testing, and related data are displayed on the tester. According to the invention, the connection firmness between layers of the multi-layer pipe can be rapidly measured, and the operation is simple and convenient.

Description

Technical Field

[0001] This invention belongs to the field of multilayer tube layer testing technology, specifically relating to a multilayer tube layer testing equipment and testing method. Background Technology

[0002] With the continuous advancement of modern medicine, the clinical needs for medical catheters have evolved, leading to the development of double-lumen, triple-lumen, and multi-lumen catheters based on their increased functionality. Examples include: video endotracheal intubation tubes, suction endotracheal intubation tubes, cervical balloon catheters, and peripheral balloon catheters. Double-layered and multi-layered catheters (composed of two or more layers) have also emerged, such as reinforced anesthesia catheters, reinforced endotracheal intubation tubes, microcatheters, and angiography catheters. Endoscopic examinations and surgeries also require high-quality medical catheters, driving the development of medical catheter technology and placing higher demands on the performance and quality of rigid material catheters. For example, in cardiovascular interventional surgery, catheters with sufficient support are needed to accurately reach the lesion site and perform treatment.

[0003] During the manufacturing process, delamination can occur in multilayer catheters due to factors such as technology, equipment, molds, or other influences. For example, multilayer catheters are core tools in advanced surgical procedures such as microcatheter neurointervention, chronic total coronary occlusion (CTO), and peripheral vascular superselective embolization, used to deliver blood or drugs to patients. If delamination occurs during manufacturing, it can lead to catheter deformation and prevent the catheter from achieving its intended clinical effect. Therefore, addressing delamination in multilayer catheters is crucial.

[0004] The layering test of the tube body is the primary task in solving the layering problem of multi-layer tubes. Currently, the layering test of multi-layer tubes has the following problems: it can only be tested by a microscope or a tensile testing machine. Microscopic observation does not provide specific numerical values, so it is impossible to determine whether it can meet clinical needs; tensile testing can only test larger tube bodies, and smaller tubes may not be able to be tested, and the fixtures are not suitable.

[0005] To address the above problems, this invention provides a new multilayer pipe layering testing equipment and method, which can adapt to the testing of various multilayer pipe layers, and the testing is more accurate and the measurement results are more intuitive. Summary of the Invention

[0006] In order to solve the problems in the prior art, the present invention provides a multilayer pipe layer testing equipment and testing method.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A multi-layer tube layer testing device includes a sample clamp, a test operation section, and a test data statistics section; The sample clamp is used to hold and fix the sample piece; the sample piece is cut from a multi-layer tube, including a first tube layer and a second tube layer. The first tube layer and the second tube layer separate in the rear half to form the clamping part, while they are still connected together in the front half; the connection position of the first tube layer and the second tube layer forms the test position. The sample fixture includes a fixture fixing plate with a fixed position. The fixture fixing plate is provided with a left clamping mechanism and a right clamping mechanism arranged symmetrically from left to right. The left clamping mechanism is used to clamp and fix the clamped part of the first tube layer, and the right clamping mechanism is used to clamp and fix the clamped part of the second tube layer. After the sample is clamped and fixed, the test position of the sample faces backward and the front half of the sample faces forward. The test operation section includes a base plate, on which a forward and backward moving mechanism is installed. The test data statistics section is installed on the forward and backward moving mechanism and moves forward and backward under the drive of the forward and backward moving mechanism. The front and rear testing mechanism includes a probe and a testing instrument. The probe is mounted on the testing instrument and points forward, pointing to the test position of the sample. The probe performs the test and displays the relevant data on the testing instrument.

[0008] Furthermore, the left clamping mechanism and the right clamping mechanism have the same structure and are arranged symmetrically from left to right; Both the left and right clamping mechanisms include a fixed clamping block, a clamping module, and a clamping bolt. The fixed clamping block is fixed to the clamping plate by the fixed bolt. The fixed clamping block is provided with a clamping groove, and the side of the clamping groove facing the sample has an opening. The clamping module is located in the clamping groove. The clamping bolt extends in the front-back direction and is threadedly connected to the fixed clamping block. The rear end of the clamping bolt is movably connected to the clamping module.

[0009] Furthermore, the clamping module has a blind hole on the side facing the clamping bolt, the diameter of which is larger than that of the clamping bolt; the clamping module has a locking hole that is perpendicularly connected to the blind hole, and a set screw that is threadedly connected to the locking hole.

[0010] Furthermore, the fixing clamp block is provided with two or more fixing holes, all of which are elongated holes in the left-right direction, and corresponding fixing bolts pass through the fixing holes.

[0011] Furthermore, the forward and backward moving mechanism includes a guide rail and a lead screw arranged on the base plate. The guide rail is arranged in the forward and backward direction and has a slider that slides with it. The lead screw is arranged parallel to the guide rail and one end of the lead screw is connected to a servo motor. The lead screw has a nut seat that is threadedly connected to it. A movable connecting plate is fixed on the nut seat and is also fixedly connected to the slider. A tester fixing plate is fixed on the movable connecting plate and the tester is mounted on the tester fixing plate.

[0012] Furthermore, the guide rails are provided in two sections, with the lead screw located between the two guide rails.

[0013] Furthermore, the side of the base plate is fixed with a side guide groove extending in the front-to-back direction. A front limiter and a rear limiter are provided on the side guide groove at a front-to-back distance. The front limiter and the rear limiter can move and lock their positions in the side guide groove. A limit plate is fixed on the slider, and the limit plate is located between the front limiter and the rear limiter.

[0014] Furthermore, the probe is detachably connected to the testing instrument.

[0015] Furthermore, it also includes a parameter control section, which includes a parameter adjustment device, a start button, a stop button, and a control panel; the parameter control section sets the parameters of the equipment according to the product's technical requirements, including: test speed and test gauge length.

[0016] This invention also discloses a multi-layer pipe layering test method, based on the aforementioned multi-layer pipe layering test equipment, comprising the following steps: (1) Sample selection: Cut the multilayer tube into sample pieces and clamp and fix the sample pieces in the sample fixture part; (2) Probe selection: Select a probe of appropriate diameter according to the wall thickness of the multilayer tube and fix the probe on the tester; (3) Parameter setting: Select the appropriate speed and gauge length according to clinical needs; (4) According to the set parameters, the forward and backward moving mechanism drives the probe to move forward, the probe is inserted into the layer of the tube, and the tester reads and records the relevant data.

[0017] Compared with the prior art, the apparatus and method of the present invention have the following advantages: 1. This invention provides a new testing equipment and method for multilayer pipes, which can quickly measure the connection strength between layers of multilayer pipes. It is easy to operate, solves the problem of inaccurate testing of multilayer pipes in the prior art, and reduces the workload of testing personnel and testing time.

[0018] 2. This invention allows for direct setting of relevant parameters and display of relevant data, reducing the complexity of testing and solving the problems of "no data support for testing through a microscope" or "testing on a tensile testing machine, where the outer diameter of the tube is too small to select a suitable fixture for testing". Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a top view of the sample clamp portion in this invention; Figure 4 for Figure 3 AA section view in the image.

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Example 1: like Figures 1 to 4 As shown, this embodiment provides a multilayer tube layering test equipment, including a sample clamping part, a test operation part, a test data statistics part, and a parameter control part.

[0023] Multilayer tubes consist of two or more layers and can be made of various materials such as TPU, PVC, nylon, and stainless steel, meeting the requirements of medical devices. Sample 1 is a rectangular sample obtained by cutting multilayer tubes, including a first tube layer and a second tube layer. The first and second tube layers separate in the rear half to form clamping parts, while remaining connected in the front half; the connection point between the first and second tube layers forms the test position.

[0024] The sample clamping part is used to clamp and fix the sample. The sample clamping part includes a clamping fixing plate 17, which is supported and fixed by a side plate 18. The clamping fixing plate 17 is provided with a left clamping mechanism and a right clamping mechanism arranged symmetrically from left to right. The left clamping mechanism is used to clamp and fix the clamped part of the first tube layer, and the right clamping mechanism is used to clamp and fix the clamped part of the second tube layer. After the sample is clamped and fixed, the test position of the sample 1 faces backward, and the front half of the sample 1 faces forward.

[0025] Specifically, the left clamping mechanism includes a left fixed clamping block 23, a left clamping module 22, and a left clamping bolt 21. The left fixed clamping block 23 is fixed to the clamping fixing plate 17 by a fixing bolt. The left fixed clamping block 23 is provided with a left clamping groove, and the left clamping groove has an opening on the side facing the sample. The left clamping module 22 is located in the left clamping groove. The left clamping bolt 21 extends in the front-back direction and is threadedly connected to the left fixed clamping block 23. The rear end of the left clamping bolt 21 is movably connected to the left clamping module 22.

[0026] In this embodiment, the left fixing clamp block 23 is provided with two fixing holes, both of which are elongated holes in the left-right direction. Corresponding left fixing bolts 28 and 29 pass through the two fixing holes. This allows the left-right position of the left fixing clamp block 23 to be adjusted according to the different specifications of the multilayer tube.

[0027] In this embodiment, the left clamping module 22 has a blind hole on the side facing the left clamping bolt, and the diameter of the blind hole is larger than that of the left clamping bolt 21; the left clamping module 22 has a locking hole that is perpendicularly connected to the blind hole, and a set screw 25 is provided at the locking hole for threaded connection.

[0028] The left clamping module 22 fixes the first tube layer of sample 1. The specific working process is as follows: First, tighten the set screw 25. Then, according to the thickness of the sample, adjust the position of the left clamping module 22 with the left clamping bolt 21, thereby adjusting the distance between the left clamping module 22 and the left fixing clamp block 23 to ensure the tightness of the clamping of sample 1. After clamping, tighten the set screw 25 to achieve a stable connection between the left clamping module 22 and the left clamping bolt 21.

[0029] The right clamping mechanism has the same structure as the left clamping mechanism, and the two are arranged symmetrically. The right clamping mechanism includes a right fixed clamping block 33, a right clamping module 32, a right clamping bolt 31, and right fixed bolts 26 and 27. The specific structure and connection relationship of each component can be referred to the left clamping mechanism, and will not be described in detail in this embodiment.

[0030] The test operation section includes a base plate 19, on which a forward and backward moving mechanism is provided. The test data statistics section is installed on the forward and backward moving mechanism, which moves forward and backward under the drive of the forward and backward moving mechanism.

[0031] Specifically, the forward and backward moving mechanism includes guide rails 15 and a lead screw 16 arranged on the base plate. Two guide rails 15 are arranged along the forward and backward direction, and a slider 14 is slidably engaged with each guide rail 15. The lead screw 16 is arranged parallel to the guide rails 15 and located between the two guide rails 15. One end of the lead screw 16 is connected to the servo motor 4 for transmission. A nut seat with a threaded connection is provided on the lead screw 16, and a movable connecting plate 13 is fixedly mounted on the nut seat. The movable connecting plate 13 is also fixedly connected to the slider 14; a testing instrument fixing plate 12 is fixedly mounted on the movable connecting plate 13.

[0032] During testing, the servo motor 4 rotates the lead screw 16 forward or backward according to the set parameters, thereby driving the slider 14 to move back and forth along the guide rail 15, which in turn drives the test data statistics section to move back and forth.

[0033] In this embodiment, a side guide groove extending in the front-to-back direction is fixed to the side of the base plate 19. A front limiter 9 and a rear limiter 10 are distributed at a front-to-back distance on the side guide groove, and the front limiter 9 and the rear limiter 10 can move and be locked in position within the side guide groove. A limit plate 11 is fixed on the slider 14, and the limit plate 11 is located between the front limiter 9 and the rear limiter 10. By adjusting the positions of the front limiter 9 and the rear limiter 10, the starting point and ending point of the slider, i.e., the test gauge length, are determined.

[0034] The front and rear testing mechanisms include probe 2 and tester 3. Tester 3 is a peel force tester, which is an existing instrument. Tester 3 is mounted on tester mounting plate 12. Probe 2 is detachably mounted on the tester by fixing screw 8, and probe 2 is forward and points to the test position of sample 1; the test is conducted through probe 8, and the reading can be directly obtained from tester 3.

[0035] The parameter control section includes a parameter adjustment device 20, a start button 6, a stop button 7, and a control panel 5. The device can be configured with parameters such as test speed and test gauge length according to the product's technical requirements.

[0036] Example 2: This embodiment discloses a multilayer pipe layering test method, based on the multilayer pipe layering test equipment of Embodiment 1, including the following steps: (1) Sample selection: Cut the multi-layer tube with a wall thickness of 1mm into a 10*10mm sample 1, and clamp and fix the sample 1 in the sample fixture part.

[0037] (2) Probe selection: Select probe 2 with a diameter of 0.05 mm based on the wall thickness of 1 mm, and fix probe 2 on the tester 3.

[0038] (3) Parameter setting: Select the appropriate test speed and test gauge length according to clinical needs. In this embodiment, the test speed is selected as 10 mm / s and the test gauge length is 10 mm to test the multilayer tube sample.

[0039] (4) According to the set parameters, the servo motor 4 rotates the lead screw 16 in the forward direction, thereby driving the tester 3 and probe 2 to move forward. The probe 2 is inserted into the layer of the tube body and reads the data directly from the tester (3). Then the relevant data is recorded. After that, the servo motor 4 rotates the lead screw 16 in the reverse direction, driving the tester 3 and probe 2 to reset.

[0040] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0041] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A multi-layer pipe delamination testing apparatus, comprising: The sample clamp part, the test running part and the test data statistics part are included; The sample clamp part is used for clamping and fixing the sample piece; the sample piece is obtained by cutting a multi-layer tube, including a first tube layer and a second tube layer, the first tube layer and the second tube layer are separated in the latter half part to form the clamped parts respectively, and are connected together in the former half part; the connection position of the first tube layer and the second tube layer forms the test position; The sample clamp part includes a fixed clamp fixing plate, the left clamping mechanism and the right clamping mechanism are symmetrically arranged on the clamp fixing plate, the left clamping mechanism is used for clamping and fixing the clamped part of the first tube layer, and the right clamping mechanism is used for clamping and fixing the clamped part of the second tube layer; after the sample piece is clamped and fixed, the test position of the sample piece faces backward, and the former half part of the sample piece faces forward; The test running part includes a bottom plate, a front-back moving mechanism is arranged on the bottom plate, and the test data statistics part is installed on the front-back moving mechanism and moves forward and backward under the driving of the front-back moving mechanism; The front-back test mechanism includes a probe and a tester, the probe is installed on the tester, and the probe faces forward and points to the test position of the sample piece; the probe tests and displays related data from the tester.

2. The multi-layer pipe delamination test apparatus of claim 1, wherein, The left clamping mechanism and the right clamping mechanism are consistent in structure and are symmetrically arranged left and right; The left clamping mechanism and the right clamping mechanism each include a fixed clamp block, a clamping module and a clamping bolt, the fixed clamp block is fixed on the clamp fixing plate through a fixed bolt, the fixed clamp block is provided with a clamping groove, and the side of the clamping groove facing the sample piece has an opening; the clamping module is located in the clamping groove, the clamping bolt is arranged in the front-back direction and is threadedly connected with the fixed clamp block, and the rear end of the clamping bolt is movably connected with the clamping module.

3. The multi-layer pipe delamination test apparatus of claim 2, wherein, A blind hole is arranged on the side of the clamping module facing the clamping bolt, and the diameter of the blind hole is greater than that of the clamping bolt; a locking hole is arranged on the clamping module and is vertically communicated with the blind hole, and a jack screw is threadedly connected with the locking hole.

4. The multi-layer pipe delamination test apparatus of claim 2, wherein, Two or more fixed holes are arranged on the fixed clamp block, and the fixed holes are long holes in the left-right direction, and corresponding fixed bolts are arranged in the fixed holes.

5. The multi-layer pipe delamination test apparatus of claim 1, wherein, The front-back moving mechanism includes guide rails and a lead screw arranged on the bottom plate, the guide rails are arranged in the front-back direction, the guide rails are provided with sliding blocks in sliding fit, the lead screw is arranged in parallel with the guide rails, one end of the lead screw is drivingly connected with a servo motor, the lead screw is provided with a nut seat in threaded connection therewith, the nut seat is fixedly provided with a moving connection plate, the moving connection plate is fixedly connected with the sliding block, the moving connection plate is fixedly provided with a tester fixing plate, and the tester is installed on the tester fixing plate.

6. The multi-layer pipe delamination test apparatus of claim 5, wherein, The guide rails are provided with two, and the lead screw is located between the two guide rails.

7. The multi-layer pipe delamination test apparatus of claim 5, wherein, A side guide groove extending in the front-back direction is fixed to the side of the bottom plate, front and rear limiters are arranged on the side guide groove at a front-back interval, the front and rear limiters can move and be locked in position in the side guide groove, and a limiting plate is fixed to the sliding block and located between the front and rear limiters.

8. The multi-layer pipe delamination test apparatus of claim 1, wherein, The probe and the tester are detachably connected.

9. The multi-layer pipe delamination test apparatus of any of claims 1-8, wherein, The parameter control part includes a parameter adjusting device, a start button, a stop button and a control panel. Parameter control part sets parameters of the equipment according to product technical requirements, the parameters include: test speed and test gauge length.

10. A method of delamination testing of a multilayer pipe based on the delamination testing apparatus of any one of claims 1-9, characterized by The method comprises the following steps: (1) Sample selection: cut the multi-layer tube into a sample, and clamp and fix the sample on the sample clamp part; (2) Probe selection: select a probe with a proper diameter according to the wall thickness of the multi-layer tube, and fix the probe on the tester; (3) Parameter setting: select a proper speed and gauge length according to clinical needs; (4) According to the set parameters, the forward and backward moving mechanism drives the probe to move forward, the probe is inserted into the layered part of the tube body, and the tester reads related data and records.

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