Injection pump detection tool for biomedical engineering

Abstract

The invention relates to the field of biomedical engineering, in particular to an injection pump detection tool for biomedical engineering, which comprises a clamping mechanism used for clamping a linear conveying component of an injection pump; one end of the follow-up rod is connected with the clamping mechanism, the other end of the follow-up rod is provided with a connecting block, and the connecting block is provided with a hollow rod; the straight cylinder is vertically arranged on the support, a vertical rod is arranged on the connecting block, and a lower piston is arranged at the top of the vertical rod; the U-shaped rod is slidably arranged on the support in the vertical direction, an upper piston is arranged at one end of the U-shaped rod, and the other end of the U-shaped rod is inserted into the vertical section of the hollow rod in a matched mode; the distance detection device is arranged on the hollow rod, and a distance detection plate located over the distance detection device is arranged on the support; and a control system and inflation and deflation equipment are arranged in the control box. According to the invention, the pressure adjustment is flexible and changeable, the adjustment modes are multiple, and the conveying performance of the injection pump can be fully detected.

Description

Technical Field

[0001] The present invention relates to the technical field of biomedical engineering, in particular to an injection pump detection tool for biomedical engineering. Background Art

[0002] Biomedical engineering combines biomedicine and engineering, encompassing diverse areas including medical devices, biomaterials, information technology, rehabilitation engineering, and bioinformatics. Syringe pumps play a crucial role in this industry, particularly in precision medicine, drug delivery systems, clinical treatment, and research and development. Their performance directly impacts the effectiveness and reliability of the equipment. Testing the delivery stability of syringe pumps is crucial, as this parameter determines their ability to deliver precise flow rates.

[0003] Chinese patent publication number CN114563205B discloses a syringe pump testing tool for medical biomedical engineering. The operation of the medical syringe pump drives the syringe in reverse, causing the platform to move or have a tendency to move in the opposite direction of gravity. This allows the load assembly to simulate different background pressures, facilitating testing of the syringe pump's injection capacity and stability.

[0004] However, the above-mentioned disclosed solutions have the following shortcomings: different background pressures are simulated by changing the weights, resulting in large fluctuations in the adjustment range and few pressure adjustment modes. Summary of the Invention

[0005] The present invention aims to address the problems of large fluctuations in the background pressure adjustment interval and few pressure adjustment modes in the background technology, and to propose a syringe pump detection tool for biomedical engineering.

[0006] The technical solution of the present invention is: a syringe pump detection tool for biomedical engineering, comprising a bracket and a syringe pump to be detected; and further comprising:

[0007] A clamping mechanism, used to clamp onto the linear conveying component of the syringe pump;

[0008] The follower rod is L-shaped, one end of which is connected to the clamping mechanism, and the other end is provided with a connecting block, and a hollow rod is provided on the connecting block;

[0009] The straight cylinder is vertically arranged on the bracket, a vertical rod is arranged on the connecting block, a lower piston is arranged on the top of the vertical rod, and the lower piston is inserted into the straight cylinder;

[0010] A U-shaped rod is slidably arranged on the bracket in the vertical direction. An upper piston is provided at one end of the U-shaped rod and inserted into the straight cylinder. The other end is inserted into the vertical section of the hollow rod. A locking structure is provided between the U-shaped rod and the hollow rod.

[0011] The distance detection device is arranged on the hollow rod, and the bracket is provided with a distance detection plate located directly above the distance detection device;

[0012] And a control box, in which a control system and an inflation and deflation device are arranged. The inflation and deflation device is used to inflate or deflate the area between the lower piston and the upper piston in the straight cylinder. The control system is control-connected to the inflation and deflation device.

[0013] Preferably, the clamping mechanism includes a rotating cylinder rotatably connected to the end of the follower rod, a box body arranged on the rotating cylinder, two clamping plates slidably arranged on the inner wall of the box body, and two adjusting bolts that cooperate with the box body threads and push the two clamping plates close to clamping.

[0014] Preferably, an inflation connector and a solenoid valve are provided on the straight cylinder, and the solenoid valve is opened to release air. The inflation connector and the solenoid valve are both located between the upper piston and the lower piston, and the inflation connector is connected to the inflation and deflation equipment.

[0015] Preferably, the bracket is used to detect the pushing stability of the syringe pump in the vertical direction when the bracket is in the vertical state, and is used to detect the pushing stability of the syringe pump in the horizontal direction when the bracket is in the horizontal state.

[0016] Preferably, the cross-sectional outer contours of the hollow rod and the U-shaped rod are both square.

[0017] Preferably, it further comprises a resistance adjustment mechanism, which is provided on the hollow rod and is used to adjust the resistance of relative sliding between the hollow rod and the U-shaped rod.

[0018] Preferably, the resistance adjustment mechanism includes a fixing frame arranged on the hollow rod, a pressure rod horizontally and slidably arranged on the fixing frame, an elastic member arranged at the end of the pressure rod and passing through a avoidance hole arranged on the hollow rod and then resting on the U-shaped rod, a limiting ring arranged on the pressure rod, and a spring sleeved on the pressure rod, wherein both ends of the spring are respectively connected to the fixing frame and the limiting ring.

[0019] Preferably, a sleeve is provided on the outer wall of the hollow rod, a thread is provided on the outer peripheral wall of the sleeve, a cone is provided on the outer sleeve, the cone is matched with the sleeve thread, and the inner peripheral wall of the cone contacts the end of the pressure rod.

[0020] Compared with the existing technology, the present invention has the following beneficial technical effects: by providing different resistances through the resistance adjustment mechanism, it can simulate the delivery environment under fixed pressure, which is used to test the delivery stability of the syringe pump under specific pressure; by linearly adjusting the delivery resistance through gas compression, it is used to test the delivery stability of the syringe pump under linearly changing pressure; by controlling the inflation and deflation of the inflation and deflation device, it can achieve nonlinear delivery environment simulation. The present invention can perform linear and nonlinear background pressure adjustment simulation tests, and can also test the delivery stability under specific resistance. The pressure adjustment is flexible and changeable, with multiple adjustment modes, and can fully test the delivery performance of the syringe pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective;

[0023] Figure 3 for Figure 1 Schematic diagram of the structure after removing the straight tube;

[0024] Figure 4 is a schematic diagram of the resistance adjustment mechanism;

[0025] Figure 5 for Figure 4 Schematic diagram of the structure after removing the cone;

[0026] Figure 6 Schematic diagram of the clamping mechanism.

[0027] 1. Bracket; 2. Clamping mechanism; 3. Follower rod; 4. Connecting block; 5. Vertical rod; 6. Straight cylinder; 7. Lower piston; 8. Upper piston; 9. Inflating joint; 10. Solenoid valve; 11. Straight cylinder mounting plate; 12. Vertical rod guide plate; 13. U-shaped rod; 14. Hollow rod; 15. Hollow rod guide plate; 16. U-shaped rod guide plate; 17. Sleeve; 18. Thread; 19. Cone; 20. Fixing frame; 21. Pressure rod; 22. Elastic member; 23. Limiting ring; 24. Spring; 25. Distance detection device; 26. Distance detection plate; 27. Rotating cylinder; 28. Locking bolt; 29. ​​Box body; 30. Clamping plate; 31. Adjusting bolt; 32. Control box; 33. Guide rail; 34. U-shaped rod fixing bolt; 35. Connecting bolt. DETAILED DESCRIPTION

[0028] Example 1, as Figure 1-Figure 3 As shown, the present invention proposes a syringe pump detection tool for biomedical engineering, comprising a bracket 1 and a syringe pump to be detected; and further comprising:

[0029] The clamping mechanism 2 is used to clamp on the linear conveying component of the syringe pump, such as the push rod, and move synchronously with the linear conveying component of the syringe pump;

[0030] The follower rod 3 is L-shaped, one end of which is connected to the clamping mechanism 2, and the other end is provided with a connecting block 4. A hollow rod 14 is provided on the connecting block 4. The connecting block 4 needs to rise and fall synchronously with the follower rod 3. In order to improve the stability of the overall movement, a slider is provided on the connecting block 4, and a guide rail 33 is vertically provided on the bracket 1. The slider and the guide rail 33 cooperate to slide vertically. The hollow rod 14 also needs to move up and down synchronously. In order to improve stability, a hollow rod guide plate 15 is provided on the bracket 1. The hollow rod guide plate 15 is provided with a guide hole for the hollow rod 14 to pass through;

[0031] The straight cylinder 6 is vertically arranged on the bracket 1. Specifically, two straight cylinder mounting plates 11 are provided on the bracket 1. The straight cylinder 6 passes through the two straight cylinder mounting plates 11. The two straight cylinder mounting plates 11 are respectively located at the upper and lower ends of the straight cylinder 6. A vertical rod 5 is provided on the connecting block 4. A lower piston 7 is provided on the top of the vertical rod 5. The lower piston 7 cooperates and is inserted into the straight cylinder 6. In order to improve the stability of the vertical rod 5 moving up and down, a vertical rod guide plate 12 is provided on the bracket 1. The vertical rod guide plate 12 is provided with a guide hole for the vertical rod 5 to pass through;

[0032] The U-shaped rod 13 is slidably arranged on the bracket 1 in the vertical direction and a limit mechanism is provided on the straight cylinder 6 to limit its movement. One end of the U-shaped rod 13 is provided with an upper piston 8 inserted into the straight cylinder 6, and the other end is inserted into the vertical section of the hollow rod 14. The cross-sectional outer contours of the hollow rod 14 and the U-shaped rod 13 are both square. There is a locking structure between the U-shaped rod 13 and the hollow rod 14. Specifically, relative through holes are provided on the U-shaped rod 13 and the hollow rod 14, and the connecting bolts 35 are passed through the through holes and then locked with nuts. To fix the U-shaped rod 13 and the hollow rod 14 so that they cannot move relative to each other, the limiting mechanism includes a flat plate arranged on the top of the outer peripheral wall of the straight cylinder 6, and a U-shaped rod fixing bolt 34. The U-shaped rod 13 and the flat plate are provided with opposite through holes. The U-shaped rod fixing bolt 34 passes through the two through holes and is locked by a nut. The U-shaped rod 13 also needs to move up and down in some detection modes. In order to improve stability, a U-shaped rod guide plate 16 is provided on the bracket 1. The U-shaped rod guide plate 16 is provided with a guide hole for the U-shaped rod 13 to pass through;

[0033] The distance detection device 25 is provided on the horizontal section of the hollow rod 14, and the bracket 1 is provided with a distance detection plate 26 located directly above the distance detection device 25;

[0034] And a control box 32, which is provided with a control system and an inflation and deflation device, which is used to inflate or deflate the area between the lower piston 7 and the upper piston 8 in the straight cylinder 6, the control system is control-connected to the inflation and deflation device, and the control system is data-transmitted connected to the distance detection device 25, and the specific structure of inflation and deflation is as follows: an inflation connector 9 and a solenoid valve 10 are provided on the straight cylinder 6, and the solenoid valve 10 is opened to deflate, and the inflation connector 9 and the solenoid valve 10 are both located between the upper piston 8 and the lower piston 7. In order to ensure that the stroke is large enough, the inflation connector 9 and the solenoid valve 10 are arranged at a position close to the upper piston 8, the inflation connector 9 is connected to the inflation and deflation device, and the control system is control-connected to the solenoid valve 10.

[0035] When the bracket 1 is in the vertical state, it is used to test the pushing stability of the syringe pump in the vertical direction. When the bracket 1 is in the horizontal state, it is used to test the pushing stability of the syringe pump in the horizontal direction.

[0036] Example 2, as Figure 6 As shown, the present invention proposes a syringe pump detection tool for biomedical engineering. Compared with the first embodiment, this embodiment introduces the structure of the clamping mechanism 2 in detail.

[0037] The clamping mechanism 2 includes a rotating cylinder 27 rotatably connected to the end of the follower rod 3, a box body 29 arranged on the rotating cylinder 27, two clamping plates 30 slidingly arranged on the inner wall of the box body 29, and two adjusting bolts 31 threadedly engaged with the box body 29 and pushing the two clamping plates 30 close to clamping; specifically, a plurality of threaded holes are provided on the peripheral wall of the rotating cylinder 27, and a plurality of blind holes opposite to the threaded holes are provided on the follower rod 3. The locking bolts 28 are engaged with the threaded holes and inserted into the blind holes to complete the positioning of the rotating cylinder 27. The angle of the clamping mechanism 2 can be flexibly adjusted according to the usage scenario to adapt to vertical and horizontal injection pump detection, and the usage scenarios are diversified.

[0038] Example 3, as Figure 4-Figure 5 As shown, the present invention proposes a syringe pump detection tool for biomedical engineering. Compared with the first embodiment, this embodiment introduces the structure of the resistance adjustment mechanism in detail.

[0039] The resistance adjustment mechanism is provided on the hollow rod 14 and is used to adjust the resistance of relative sliding between the hollow rod 14 and the U-shaped rod 13 .

[0040] The resistance adjustment mechanism includes a fixing frame 20 arranged on the hollow rod 14, a pressure rod 21 horizontally and slidably arranged on the fixing frame 20, an elastic member 22 arranged at the end of the pressure rod 21 and passing through the avoidance hole set on the hollow rod 14 and then resting on the U-shaped rod 13, a limiting ring 23 arranged on the pressure rod 21, and a spring 24 sleeved on the pressure rod 21, and the two ends of the spring 24 are respectively connected to the fixing frame 20 and the limiting ring 23.

[0041] A sleeve 17 is provided on the outer wall of the hollow rod 14, and a thread 18 is provided on the outer peripheral wall of the sleeve 17. A cone 19 is provided on the outer sleeve 17. The cone 19 is threadably engaged with the sleeve 17, and the inner peripheral wall of the cone 19 contacts the end of the pressure rod 21; the cone 19 squeezes the pressure rod 21 through the inner wall, and then squeezes the U-shaped rod 13 through the elastic member 22. By rotating the cone 19 to adjust its upper and lower heights, the pressure applied to the elastic member 22 can be changed, thereby adjusting the resistance to relative sliding between the hollow rod 14 and the U-shaped rod 13.

[0042] In summary, when the present invention is in use, the clamping mechanism 2 is clamped and connected to the delivery component of the syringe pump. When the syringe pump is in operation, it drives the follower rod 3 to move. The movement speed of the follower rod 3 can be calculated based on the data of the distance detection device 25. By outputting the movement speed of the follower rod 3 by the control system, the delivery performance of the syringe pump can be tested. In the present invention, the delivery performance test under various background pressures can be simulated, as follows:

[0043] 1. Delivery stability test under fixed pressure: remove the U-shaped rod fixing bolt 34 to allow the U-shaped rod 13 to move up and down, insert the connecting bolt 35 to make the U-shaped rod 13 and the hollow rod 14 move synchronously, at this time the injection pump drives the follower rod 3 to move, and the externally applied resistance is the friction between multiple structures, such as the friction between the upper piston 8, the lower piston 7 and the straight cylinder 6, the friction between the vertical rod 5 and the vertical rod guide plate 12, the friction between the hollow rod 14 and the hollow rod guide plate 15, etc.; alternatively, fix the U-shaped rod 13, remove the connecting bolt 35, open the solenoid valve 10, so that the gas in the straight cylinder 6 can be smoothly squeezed out by the lower piston 7. In this case, the movement resistance between the hollow rod 14 and the U-shaped rod 13 is changed by the resistance adjustment mechanism, so that the appropriate pressure can be provided according to needs to perform the delivery stability test of the injection pump;

[0044] 2. Delivery stability test under linear pressure change: Install the U-shaped rod fixing bolt 34, fix the U-shaped rod 13, remove the connecting bolt 35, so that the hollow rod 14 and the U-shaped rod 13 can move relative to each other, and inject gas of set pressure between the upper piston 8 and the lower piston 7. When the syringe pump drives the follower rod 3 to move, the lower piston 7 continuously squeezes the gas, and the movement resistance of the lower piston 7 increases linearly. The linearly increasing resistance is transmitted to the delivery component of the syringe pump, so as to observe the delivery stability of the syringe pump under the delivery environment of linear pressure increase. The initial pressure can be adjusted by changing the air pressure between the upper piston 8 and the lower piston 7;

[0045] 3. Delivery stability test under nonlinear pressure change. Different from the delivery stability test under linear pressure change, in this test mode, the air pressure between the upper piston 8 and the lower piston 7 is continuously changed by the inflation and deflation equipment, thereby achieving nonlinear pressure change, thereby observing the delivery stability of the syringe pump under the delivery environment with nonlinear pressure change.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A syringe pump detection tool for biomedical engineering, comprising a bracket (1) and a syringe pump to be detected; characterized in that: Also includes: A clamping mechanism (2) is used to clamp onto the linear conveying component of the syringe pump; A follower rod (3) is L-shaped, one end of which is connected to the clamping mechanism (2), and the other end of which is provided with a connecting block (4), and a hollow rod (14) is provided on the connecting block (4); A straight cylinder (6) is vertically arranged on the bracket (1), a vertical rod (5) is arranged on the connecting block (4), a lower piston (7) is arranged on the top of the vertical rod (5), and the lower piston (7) is inserted into the straight cylinder (6); A U-shaped rod (13) is slidably arranged on the bracket (1) in a vertical direction. An upper piston (8) is arranged at one end of the U-shaped rod (13) to be inserted into the straight cylinder (6), and the other end is cooperatively inserted into the vertical section of the hollow rod (14). A locking structure is provided between the U-shaped rod (13) and the hollow rod (14); A distance detection device (25) is provided on the hollow rod (14), and a distance detection plate (26) is provided on the bracket (1) and is located directly above the distance detection device (25); and a control box (32) in which a control system and an air-inflating and air-deflation device are arranged. The air-inflating and air-deflation device is used to inflate or deflate the area between the lower piston (7) and the upper piston (8) in the straight cylinder (6). The control system is control-connected to the air-inflating and air-deflation device.

2. The syringe pump detection tool for biomedical engineering according to claim 1, characterized in that: The clamping mechanism (2) comprises a rotating cylinder (27) rotatably connected to the end of the follower rod (3), a box body (29) arranged on the rotating cylinder (27), two clamping plates (30) slidably arranged on the inner wall of the box body (29), and two adjusting bolts (31) threadedly engaged with the box body (29) and pushing the two clamping plates (30) close to the clamping.

3. The syringe pump detection tool for biomedical engineering according to claim 1, characterized in that: An air charging connector (9) and an electromagnetic valve (10) are provided on the straight cylinder (6). The electromagnetic valve (10) is opened to release air. The air charging connector (9) and the electromagnetic valve (10) are both located between the upper piston (8) and the lower piston (7). The air charging connector (9) is connected to the air charging and discharging equipment.

4. The syringe pump detection tool for biomedical engineering according to claim 1, characterized in that: When the bracket (1) is in a vertical state, it is used to detect the pushing stability of the syringe pump that is pushed in the vertical direction. When the bracket (1) is in a horizontal state, it is used to detect the pushing stability of the syringe pump that is pushed in the horizontal direction.

5. The syringe pump detection tool for biomedical engineering according to claim 1, characterized in that: The cross-sectional outer contours of the hollow rod (14) and the U-shaped rod (13) are both square.

6. The syringe pump detection tool for biomedical engineering according to claim 1, characterized in that: It also includes a resistance adjustment mechanism, which is arranged on the hollow rod (14) and is used to adjust the resistance of relative sliding between the hollow rod (14) and the U-shaped rod (13).

7. The syringe pump detection tool for biomedical engineering according to claim 6, characterized in that: The resistance adjustment mechanism comprises a fixing frame (20) arranged on the hollow rod (14), a pressure rod (21) horizontally and slidably arranged on the fixing frame (20), an elastic member (22) arranged at the end of the pressure rod (21) and passing through a relief hole arranged on the hollow rod (14) and then abutting against the U-shaped rod (13), a limiting ring (23) arranged on the pressure rod (21), and a spring (24) sleeved on the pressure rod (21), wherein both ends of the spring (24) are respectively connected to the fixing frame (20) and the limiting ring (23).

8. The syringe pump detection tool for biomedical engineering according to claim 7, characterized in that: A sleeve (17) is provided on the outer wall of the hollow rod (14), a thread (18) is provided on the outer peripheral wall of the sleeve (17), a cone (19) is provided on the sleeve (17), the cone (19) is threadedly matched with the sleeve (17), and the inner peripheral wall of the cone (19) contacts the end of the pressure rod (21).

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