Tool for testing fixing strength of pipe body after heat setting
By designing a test tool including a water tank, fixed tooling and heating rod, the problem of difficulty in performing fixed strength tests after thermal setting of medical catheters is solved, and effective testing under constant temperature conditions is achieved, ensuring product quality and safety.
Patent Information
- Application Number
- CN202421695905.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The prior art is difficult to test the fixing strength of medical catheters after thermal setting under constant temperature, which affects product quality and safety.
A test tooling including a water tank, a fixed tooling and a heating rod is designed. A constant temperature environment is formed by injecting water into the water tank. The fixed tooling is used to fix the tail end of the conduit, and the temperature in the water tank is adjusted through the heating control box to ensure that the test is carried out under constant temperature conditions.
It realizes effective testing of the fixing strength after thermal setting of the catheter tail at a constant temperature, ensuring the quality and safety of the product, and the test tooling structure is simple and easy to operate.
Smart Images
Figure CN223051027U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of test tooling, and particularly relates to a test tooling for testing the fixing strength of a pipe body after heat setting. Background Art
[0002] Due to medical needs, some medical catheters need to be heat-set to form a specific shape, such as ureteral stents and nasobiliary drainage tubes, with the ends curled. After heat setting, it is usually necessary to test the fixing strength of the curled part, and the industry stipulates that the test end needs to be tested under a constant temperature state, which is related to the quality of the product during the production process and the safety during use. Therefore, a test tooling for testing the fixing strength of the above products is required. Content of the Utility Model
[0003] The utility model provides a test tooling for testing the fixing strength of a pipe body after heat setting, which has a simple structure and is convenient to operate, meeting the test requirements.
[0004] To achieve the above technical purpose, the technical solution adopted by the utility model is:
[0005] A test tooling for testing the fixing strength of a pipe body after heat setting includes a water tank, a fixing tooling, and a heating rod. The upper end of the water tank is provided with a through hole, and the side wall is provided with a heating hole near the lower part. The heating section of the heating rod passes through the heating hole and is fixedly connected to the water tank. The fixing tooling is in the shape of a frustum of a cone with a large upper part and a small lower part. The lower part passes through the through hole and extends into the water tank, and the lower surface of the upper part fits with the upper surface of the water tank. The upper part is provided with an opening groove, which is lower than the lower surface of the upper part. The lower part is provided with a tapered groove with a small upper part and a large lower part. The bottom of the opening groove is communicated with the top of the tapered groove through a small hole.
[0006] Further, the diameter of the small hole is 3.18 mm.
[0007] Further, the diameter of the small hole is 4.04 mm.
[0008] Further, the diameter of the small hole is 5.33 mm.
[0009] Further, the diameter of the large end of the tapered groove is 50 mm.
[0010] Further, the cone angle of the tapered groove is 60°.
[0011] Further, the material of the fixing tooling is PTFE.
[0012] Further, one end of the heating rod located outside the water tank is connected to a heating control box, and an operation display screen is provided on the surface of the heating control box.
[0013] Further, a temperature sensor is provided on the side wall of the water tank near the upper part, and the temperature sensor is electrically connected to the heating control box.
[0014] Furthermore, the water tank is a transparent water tank.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] The water tank of the present utility model can create a constant temperature test environment by injecting water and heating. The conduit passes through the fixing tooling, the test end is immersed in the water tank, and the other end extends out of the fixing tooling and can be connected to the test equipment. The test equipment can be pulled upward to perform the fixing strength test on the heat setting of the tube end. The test tooling has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0018] Figure 1 is a schematic structural diagram of the present utility model;
[0019] Figure 2 is Figure 1 the front view of the middle cross-section A-A;
[0020] In the figure: 1 - water tank, 2 - fixing tooling, 3 - heating rod, 4 - upper part, 5 - lower part, 6 - opening groove, 7 - tapered groove, 8 - small hole, 9 - conduit, 10 - heating control box, 11 - end. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0022] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.
[0023] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0024] As Figure 1 , Figure 2 shown, a test tool for the fixed strength after the heat setting of a pipe body includes a water tank 1, a fixing tool 2, and a heating rod 3. The upper end of the water tank 1 is provided with a through hole, and the side wall is provided with a heating hole near the lower part. The heating section of the heating rod 3 passes through the heating hole and is fixedly connected to the water tank 1. One end of the heating rod 3 located outside the water tank 1 is connected to a heating control box 10. The surface of the heating control box 10 is provided with an operation display screen. The side wall of the water tank 1 is provided with a temperature sensor near the upper part. The temperature sensor is electrically connected to the heating control box 10. The heating control box 10 can be connected to a socket through a power cord or can be internally provided with a mobile power source. The water tank 1 is a transparent water tank, and a water injection hole is provided at the top. The fixing tool 2 is in the shape of a frustum of a cone with a large top and a small bottom. The lower part 5 passes through the through hole and extends into the water tank 1. The lower surface of the upper part 4 fits with the upper surface of the water tank 1. The upper part 4 is provided with an opening groove 6. The opening groove 6 is lower than the lower surface of the upper part 4. The lower part 5 is provided with a tapered groove 7 with a small top and a large bottom. The diameter D of the large end of the tapered groove 7 is 50 mm; the taper angle θ of the tapered groove is 60°; the bottom of the opening groove 6 and the top of the tapered groove 7 are connected by a small hole 8.
[0025] Taking the test of the fixed strength after the heat setting of the tail end of a ureteral stent as an example, the two ends of the catheter of the ureteral stent are curled and processed by heat setting. Before the test, first cut the catheter 9 in the middle to obtain two half catheters 9, and test the two tail ends respectively. Remove the fixing tool 2, and pass the small end of the half catheter 9 upward through the small hole 8, and the large end (tail end) is retained in the tapered groove 7 at the lower part of the fixing tool 2. As Figure 2 shown, the value of the diameter d of the small hole 8 is related to the product specification. The diameter of the small hole 8 is slightly larger than the diameter of the catheter 9 to be measured and smaller than the width of the tail end of the catheter 9 to be measured. When the specification of the catheter 9 is 3.7 - 8.5 Fr, the diameter d of the small hole 8 is 3.18 mm. When the specification of the catheter 9 is 10 Fr, the diameter d of the small hole 8 is 4.04 mm. When the specification of the catheter 9 is 14 Fr, the diameter d of the small hole 8 is 5.33 mm. Fr is the unit of the catheter 9, and 1 Fr ≈ 0.33 mm. Then inject water into the water tank 1, and the water surface should be higher than the bottom surface of the opening groove 6 and lower than the top surface of the water tank 1. The heating control box 10 can adjust the heating temperature according to the feedback signal of the temperature sensor to keep the water tank 1 in a constant temperature state. As Figure 2As shown, the heat-set end of the catheter 9 is immersed in constant-temperature water, and the upper end is clamped by the test equipment and pulled upward for the fixed strength test after the end heat setting. The general requirement for the fixed strength of the end of the catheter 9 after heat setting is not less than 0.1 N. In this embodiment, after the catheter 9 is completely pulled out, the maximum value during the pulling process is taken as the test value, and meeting the fixed strength requirement indicates that the product is qualified. The material of the fixing tooling 2 is PTFE, and its weight is much greater than that of the catheter 9, so that during the test process, it can be ensured that the end 11 (test end) of the catheter 9 is always in the water tank 1, that is, the test is carried out under a constant temperature state.
[0026] Certainly, the present utility model can also have many other embodiments. Without departing from the spirit and essence of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model, but these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model.
Claims
1. A fixture for testing the fixed strength of a pipe after heat setting, characterized in that: The invention comprises a water tank (1), a fixing tool (2), and a heating rod (3). The upper end of the water tank (1) is provided with a through hole, and the side wall is provided with a heating hole at the lower part. The heating section of the heating rod (3) passes through the heating hole and is fixedly connected to the water tank (1). The fixing tool (2) is in the shape of a truncated cone with a larger upper part and a smaller lower part. The lower part (5) passes through the through hole and extends into the water tank (1). The lower surface of the upper part (4) is in contact with the upper surface of the water tank (1). The upper part (4) is provided with an open groove (6). The bottom of the open groove (6) is lower than the lower surface of the upper part (4). The lower part (5) is provided with a conical groove (7) with a smaller upper part and a larger lower part. The bottom of the open groove (6) is connected to the top of the conical groove (7) through a small hole (8).
2. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The diameter of the small hole (8) is 3.18 mm.
3. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The diameter of the small hole (8) is 4.04 mm.
4. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The diameter of the small hole (8) is 5.33 mm.
5. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The diameter of the large end of the tapered groove (7) is 50 mm.
6. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The cone angle of the conical groove is 60°.
7. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: The material of the fixing tool (2) is PTFE.
8. The fixture for testing the fixing strength of a pipe after heat setting according to claim 1, characterized in that: One end of the heating rod (3) located on the outer wall of the water tank (1) is connected to a heating control box (10), and an operation display screen is provided on the surface of the heating control box (10).
9. The fixture for testing the fixing strength of a pipe after heat setting according to claim 6, characterized in that: A temperature sensor is provided on the upper side wall of the water tank (1), and the temperature sensor is electrically connected to the heating control box (10).
10. The fixture for testing the fixing strength of a pipe after heat setting according to claim 8, characterized in that: The water tank (1) is a transparent water tank.