Equipment for testing welding strength of dialyzer end cover

Abstract

The utility model relates to testing equipment, in particular to equipment for testing the welding strength of an end cover of a dialyzer. The equipment for testing the welding strength of the dialyzer end cover comprises a rack, a water storage tank, a telescopic support, a cover plate, an air source processor, an air pipe, a valve, a control assembly and a fixing assembly, the water storage tank is connected to the right side of the top of the rack, the control assembly is installed on the left side of the top of the rack, and the air source processor is installed on the front side of the rack. And the air source processor is connected with an air pipe. By measuring the pressure when the end cover and the shell of the tested product are separated, the welding strength between the end cover and the shell can be accurately evaluated, the overall strength of the whole batch of products can be evaluated by using the test data before the products leave the factory, and the risk of the undesirable phenomenon of blood leakage of the batch of products can be judged according to the overall strength. According to the method, the production efficiency is effectively improved, and the probability that unqualified products flow into the market is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a device for testing the welding strength of a dialyzer end cover. Background Art

[0002] Hemodialyzers are used to treat patients with acute and chronic renal failure. They primarily consist of a housing, end caps, hollow fibers, and sealing adhesive. The hollow fibers are placed within the housing and secured with medical polyurethane adhesive, with one end exposed to the sealing adhesive. The housing and end caps are sealed together using ultrasonic welding to form a blood chamber.

[0003] Principle of ultrasonic welding: The equipment converts alternating current into a high-frequency signal, which is then converted into mechanical energy by the transducer and transmitted to the plastic workpiece through the welding head. Frictional heat is generated to melt the plastic and solidify it under pressure, achieving a sealed welding between the shell and the end cover. The connection strength is close to that of the material itself.

[0004] During actual use, the maximum positive pressure faced by the hemodialyzer is 500mmHg (about 66.7kPa). However, adverse events of bleeding did occur during use. Analysis of the causes found that this was mainly due to insufficient overall welding stability of the product caused by poor welding. In order to ensure the welding tightness of the dialyzer, it is currently necessary to manually test it in water using the bubble method. Although this method can achieve 100% detection, the production efficiency is low. When using automated equipment for detection, it is more difficult to detect products with trace leaks. In order to ensure product quality and the stability of the production process, it is necessary to raise the minimum standard of product welding strength (to at least 66.7kPa).

[0005] Therefore, it is necessary to test the welding strength of the end cover after welding, and use the lower limit of this strength to evaluate the overall welding stability of the product, so as to ensure the reliability and safety of the product. Utility Model Content

[0006] In order to overcome the above-mentioned shortcomings, the technical problem to be solved is: to provide a device for testing the welding strength of the dialyzer end cover.

[0007] The technical implementation scheme of the utility model is: a device for testing the welding strength of the end cover of the dialyzer, comprising a frame, a water tank, a telescopic bracket, a cover plate, an air source processor, an air pipe, a valve, a control component and a fixed component. The water tank is connected to the right side of the top of the frame, the control component is installed on the left side of the top of the frame, the air source processor is installed on the front side of the frame, the air pipe is connected to the air source processor, the other end of the air pipe is connected to the water tank, a drain port is provided at the bottom of the water tank, a valve is installed on the drain port, the cover plate is rotatably connected to the top of the water tank, the telescopic bracket is symmetrically rotatably connected to the upper side of the water tank, the upper ends of the telescopic brackets are rotatably connected to the cover plate, and a fixed component is provided in the water tank.

[0008] In addition, it is particularly preferred that the control component includes a control box, a touch screen, an air pressure sensor, an indicator light and a button, the control box is installed on the left side of the top of the rack, the touch screen is installed on the top of the control box, and the air pressure sensor, indicator light and button are installed on the rear side of the top of the control box from left to right, and the air source processor, touch screen, air pressure sensor, indicator light and button are all electrically connected to the control box.

[0009] In addition, it is particularly preferred that it also includes a base, a clamp and a locking piece. The bottom of the water tank is connected to the base, and two clamps are symmetrically and rotatably connected on both sides of the base. The two clamps that cooperate with each other are threadedly connected by a locking piece.

[0010] In addition, it is particularly preferred that the clamp is C-shaped, and the two corresponding clamps are distributed in a mirror image.

[0011] In addition, it is particularly preferred that a transparent acrylic plate is further included, and the transparent acrylic plate is symmetrically connected to the cover plate.

[0012] In addition, it is particularly preferred that universal wheels are further included, and universal wheels are symmetrically installed on both sides of the bottom of the frame.

[0013] The beneficial effect is: by measuring the pressure when the end cover and the shell of the test product are separated, the welding strength between the end cover and the shell can be accurately evaluated. By using the test data before the product leaves the factory, the overall strength of the entire batch of products can be evaluated, and the risk of bleeding problems in this batch of products can be judged accordingly. This method not only effectively improves production efficiency, but also greatly reduces the probability of unqualified products entering the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the first partial three-dimensional structure of the utility model.

[0016] Figure 3 It is a partial cross-sectional view of the present utility model.

[0017] Figure 4 This is a schematic diagram of the second partial three-dimensional structure of the utility model.

[0018] The numbers in the figure are: 1: universal wheel, 2: frame, 3: water tank, 4: telescopic bracket, 5: transparent acrylic plate, 6: cover, 7: air source processor, 71: air pipe, 8: control box, 9: touch screen, 10: air pressure sensor, 11: indicator light, 12: button, 13: base, 14: clamp, 141: locking piece, 15: drain outlet, 151: valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0020] Embodiment: A device for testing the welding strength of the dialyzer end cap, such as Figures 1-4 As shown, it includes a universal wheel 1, a frame 2, a water tank 3, a telescopic bracket 4, a transparent acrylic plate 5, a cover 6, an air source processor 7, an air pipe 71, a valve 151, a control component and a fixed component. The left and right sides of the bottom of the frame 2 are symmetrically installed with universal wheels 1 for assisting movement. The right side of the top of the frame 2 is connected to a water tank 3 for storing water. The control component is installed on the left side of the top of the frame 2. The air source processor 7 for adjusting the air pressure is installed on the front side of the frame 2. The air pipe 71 is connected to the air source processor 7. The air pipe 71 is also connected to the air pipe 71. One end is plugged into the water tank 3, and a drain outlet 15 is provided at the bottom of the water tank 3. A valve 151 is installed on the drain outlet 15. When the valve 151 is opened, the water in the water tank 3 can be discharged through the drain outlet 15 and the valve 151. The top of the water tank 3 is rotatably connected to a cover plate 6, and the cover plate 6 is symmetrically connected to a transparent acrylic plate 5 for convenient viewing of the internal working conditions of the water tank 3. The upper side of the water tank 3 is symmetrically rotatably connected to a telescopic bracket 4. The upper ends of the telescopic brackets 4 are rotatably connected to the cover plate 6, and a fixed component is provided in the water tank 3.

[0021] like Figures 1-2 As shown, the control assembly includes a control box 8, a touch screen 9, an air pressure sensor 10, an indicator light 11 and a button 12. The control box 8 is installed on the left side of the top of the frame 2 by bolts, and the touch screen 9 is installed on the top of the control box 8. The air pressure sensor 10, the indicator light 11 and the button 12 for detecting the air pressure are installed on the rear side of the top of the control box 8 from left to right. The air source processor 7, the touch screen 9, the air pressure sensor 10, the indicator light 11 and the button 12 are all electrically connected to the control box 8.

[0022] like Figures 3-4 As shown, it also includes a base 13, a clamp 14 and a locking piece 141. The bottom of the water tank 3 is connected to the base 13. Two clamps 14 for fixing the test sample are symmetrically connected to the left and right sides of the base 13 in a front-to-back rotation manner. The two clamps 14 that cooperate with each other are threadedly connected by the locking piece 141. The clamp 14 is C-shaped, fitting the shape of the test sample, and the corresponding two clamps 14 are mirror-imaged.

[0023] When the welding strength of the dialyzer end cover is detected, firstly, clean water should be added into the water storage tank 3. Then, the two dialysis liquid ports and one blood inlet of the product to be tested, which are welded with the shell and the end cover, are blocked, the other blood inlet is connected with the air pipe 71, the air pipe 71 is connected with the air source processor 7, the air path is ensured to be smooth, after the product to be tested is connected, the product to be tested is placed in the water storage tank 3 and completely immersed in water, then, the locking piece 141 is removed, the product to be tested is fixed on the clamp 14, and the clamp 14 is fixed by the locking piece 141, after all the preparation work before the above-mentioned test is completed, the cover plate 6 is covered, the telescopic support 4 will rotate and stretch according to the change of the angle, after the equipment start button 12 is pressed, the equipment inputs gas into the air source processor 7 through the air pump, the air source processor 7 adjusts the air pressure to a suitable level, and starts to fill gas into the product to be tested through the air pipe 71, the air pressure will rise from 0 to 0.6 MPa, the indicator light 11 is on, indicating that the test is in progress, during this period, the air pressure will continue to input, until the product test is completed, the equipment will automatically release the pressure, and discharge all the air pressure in the product, until the air pressure is reduced to 0, during the test process, the air pressure sensor 10 will display the maximum air pressure reached during the test of the equipment; the touch screen 9 is responsible for setting the test time and recording the test results, the test personnel can observe the condition of the product to be tested in the water storage tank 3 through the transparent acrylic plate 5 on the cover plate 6, if the end cover and the shell do not separate under the set air pressure (for example, 0.6 MPa), it means that the welding strength of the product reaches 0.6 MPa, which is much larger than the actual use pressure (0.066 MPa) of the product, if the end cover and the shell separate during the test, the touch screen 9 will record the air pressure at which the end cover and the shell separate. After the test is completed, press the button 12, the equipment will stop testing and release the pressure, at this time, the tested product can be taken out.

[0024] Although the present disclosure has been described only with respect to a limited number of embodiments, those skilled in the art who have the benefit of this disclosure will appreciate that a variety of other embodiments can be made without departing from the scope of the present application. Therefore, the scope of the present application should be limited only by the appended claims.

Claims

1. A device for testing the welding strength of dialyzer end covers, characterized in that: The invention comprises a frame (2), a water storage tank (3), a telescopic bracket (4), a cover plate (6), an air source processor (7), an air pipe (71), a valve (151), a control component and a fixed component. The right side of the top of the frame (2) is connected to the water storage tank (3), the left side of the top of the frame (2) is installed with the control component, the front side of the frame (2) is installed with the air source processor (7), the air pipe (71) is connected to the air source processor (7), the other end of the air pipe (71) is plugged with the water storage tank (3), the bottom of the water storage tank (3) is provided with a drain port (15), the drain port (15) is installed with a valve (151), the top of the water storage tank (3) is rotatably connected to the cover plate (6), the upper side of the water storage tank (3) is symmetrically rotatably connected to the telescopic bracket (4), the upper ends of the telescopic bracket (4) are both rotatably connected to the cover plate (6), and the fixed component is arranged in the water storage tank (3).

2. The device for testing the welding strength of the dialyzer end cap according to claim 1, characterized in that: The control assembly comprises a control box (8), a touch screen (9), an air pressure sensor (10), an indicator light (11) and a button (12); the control box (8) is installed on the left side of the top of the frame (2); the touch screen (9) is installed on the top of the control box (8); the air pressure sensor (10), the indicator light (11) and the button (12) are installed on the rear side of the top of the control box (8) from left to right; the air source processor (7), the touch screen (9), the air pressure sensor (10), the indicator light (11) and the button (12) are all electrically connected to the control box (8).

3. The device for testing the welding strength of the dialyzer end cap according to claim 2, characterized in that: The water tank (3) further comprises a base (13), a clamp (14) and a locking member (141). The bottom of the water tank (3) is connected to the base (13). Two clamps (14) are symmetrically and rotatably connected to both sides of the base (13). The two clamps (14) that cooperate with each other are threadedly connected via the locking member (141).

4. The device for testing the welding strength of dialyzer end caps according to claim 3, characterized in that: The clamp (14) is C-shaped, and the two corresponding clamps (14) are distributed in a mirror image.

5. The device for testing the welding strength of dialyzer end covers according to claim 4, characterized in that: It also includes a transparent acrylic plate (5), and the transparent acrylic plate (5) is symmetrically connected to the cover plate (6).

6. The device for testing the welding strength of dialyzer end covers according to claim 5, characterized in that: It also includes universal wheels (1), and the universal wheels (1) are symmetrically installed on both sides of the bottom of the frame (2).

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