A medical syringe pump and infusion pump measurement and calibration device

Abstract

The present invention discloses a medical syringe pump and infusion pump measurement and calibration device, which specifically relates to the field of measurement and calibration, and includes a main unit, wherein a first measuring tube is arranged at the upper end of the main unit, and a second measuring tube is arranged at the upper end of the main unit on one side of the first measuring tube. The present invention performs blocking pressure calibration by arranging a first measuring tube, a guide rod, a spring and a measuring plate. Output flow calibration is performed by arranging a second measuring tube, a second baffle, a bottom ring and a torsion spring. During calibration, the hydraulic pressure output by the infusion tube will push the measuring plate in the first measuring tube, and the hydraulic pressure in the infusion tube is measured by the pressure exerted on the measuring plate. The steel block on the bottom ring drives the second baffle through the central axis, inputs the liquid from the opening into the second measuring tube, and measures the flow. The calibration device is easy to operate, compact and convenient, and the mechanical structure design greatly reduces the influence of the external environment, thereby increasing the accuracy of the calibration data.

Description

Technical Field

[0001] The present invention relates to the field of measurement and calibration, and more specifically, to a measurement and calibration device for a medical injection pump and an infusion pump. Background Art

[0002] Medical syringe pumps and infusion pumps are instruments that control the infusion flow rate or the number of infusion drops to ensure that the drug can enter the patient's body at a uniform speed, accurate dosage and safely to take effect. They are often used in situations where the infusion volume and drug dosage need to be strictly controlled. The infusion rate and blockage pressure are related to the hydraulic pressure controlled by the pump body. In order to ensure the accuracy of the infusion volume, the medical syringe pumps and infusion pumps need to be calibrated using a calibration device.

[0003] However, when the above technical solution is actually used, such as the existing medical injection pumps and infusion pumps, the drug solution is transported by a stepper motor. However, during the transportation process, the output will have a certain deviation due to the influence of the mechanical factors of the pump body itself. Summary of the invention

[0004] In order to calibrate medical injection pumps and infusion pumps to ensure that their infusion volumes are accurate and reliable, an embodiment of the present invention provides a medical injection pump and infusion pump metering and calibration device. By setting a first measuring tube, a guide rod, a spring and a measuring plate, when performing a blocking pressure test, it is necessary to start a stepper motor, and the output hydraulic pressure will push the measuring plate in the first measuring tube, thereby squeezing the spring on the guide rod until the measuring plate on the guide rod stabilizes at a certain position, and then the pressure on the measuring plate is calculated based on the length of the spring squeezed by the measuring plate and the coefficient of the spring itself, thereby measuring the hydraulic pressure delivered by the pump body, and displaying the calculated data on a digital meter. By calculating the measured data, the hydraulic pressure delivered by the injection pump and the infusion pump is calibrated, reducing the impact of the external environment and increasing the accuracy of the data.

[0005] To achieve the above object, the present invention provides the following technical solution: a medical syringe pump and infusion pump measurement and calibration device, comprising a main unit, the upper end of the main unit is provided with a first measuring tube, the upper end of the main unit is located on one side of the first measuring tube and a second measuring tube is provided, and the bottom ends of the outer surfaces of the first measuring tube and the second measuring tube are both sleeved with mounting rings;

[0006] A first baffle is movably mounted on the top of the first measuring tube, a piston is fixedly mounted inside the first measuring tube below the first baffle, a through hole is opened at the inner center of the piston, and the through hole is conical in shape, a guide rod is fixedly mounted inside the first measuring tube, a baffle is fixedly mounted on the top of the guide rod, a measuring plate is sleeved on the outer surface of the guide rod, the measuring plate is slidably connected to the guide rod, a spring is sleeved on the outer surface of the guide rod below the measuring plate, the top of the spring is fixedly connected to the measuring plate, and scales are provided on the outer surfaces of the first measuring tube and the second measuring tube;

[0007] A fixing plate is fixedly installed inside the second measuring tube, an opening is opened inside the fixing plate, a second baffle is arranged on the top of the fixing plate, and a central axis is fixedly installed on one end inside the second baffle;

[0008] A digital watch is fixedly installed at the front end of the host, and a timer is fixedly installed at the front end of the host on one side of the digital watch.

[0009] In a preferred embodiment, the second baffle is movably connected to the fixed plate via a central axis, and a bottom ring is fixedly mounted on the bottom end of the central axis.

[0010] In a preferred embodiment, a chuck is disposed inside the bottom ring, and a steel block is fixedly mounted on the inner wall of the bottom ring.

[0011] In a preferred embodiment, an electromagnet is fixedly mounted on the outer surface of the chuck, and an input end of the electromagnet is electrically connected to an output end of a timer.

[0012] In a preferred embodiment, an inner groove is provided inside the fixing plate below the bottom ring, an inner rod is fixedly installed inside the inner groove, and a top end of the inner rod is fixedly connected to the chuck.

[0013] In a preferred embodiment, a torsion spring is provided on the outer surface of the inner rod, and the top end of the torsion spring is fixedly connected to the bottom ring.

[0014] In a preferred embodiment, fixing blocks are fixedly mounted on both sides of the inner wall of the mounting ring.

[0015] In a preferred embodiment, a receiving groove is provided inside the main unit at the bottom ends of the first measuring tube and the second measuring tube.

[0016] In a preferred embodiment, a clamping plate is fixedly mounted on the bottom ends of the first measuring tube and the second measuring tube, and clamping grooves are formed at both ends of the clamping plate.

[0017] In a preferred embodiment, the clamping plate matches the mounting ring, and the clamping groove matches the fixing block.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The present invention is provided with a first measuring tube, a guide rod, a spring and a measuring plate. When performing a blocking pressure test, the stepper motor needs to be started, and the output hydraulic pressure will push the measuring plate in the first measuring tube, thereby squeezing the spring on the guide rod until the measuring plate on the guide rod is stabilized at a certain position, and then the pressure on the measuring plate is calculated according to the length of the spring squeezed by the measuring plate and the coefficient of the spring itself, thereby inferring the hydraulic pressure delivered by the stepper motor, and displaying the calculated data on a digital meter, and calibrating the hydraulic pressure delivered by the injection pump and the infusion pump through the data, reducing the influence of the external environment, thereby increasing the accuracy of the data;

[0020] 2. The present invention is provided with a second measuring tube, a second baffle, a bottom ring and a torsion spring. When the infusion rate of the infusion pump is detected and calibrated, the steel block on the bottom ring is attracted by the magnetic force of the electromagnet and rotates along the chuck until the steel block is adsorbed to the surface of the electromagnet. At the same time, the second baffle is driven by the central axis to open the opening on the fixed plate. At this time, the bottom ring drives the torsion spring at the bottom to squeeze the torsion spring to input the liquid from the opening into the second measuring tube. At the same time, the timer will count for one minute. After one minute, the electromagnet will receive the signal of the timer and close. At this time, the torsion spring will drive the second baffle back to its original position to close the opening to prevent the residual liquid in the infusion tube from continuing to enter the second measuring tube.

[0021] 3. The present invention is provided with a mounting ring, a receiving groove, a clamping plate and a clamping groove. When the first measuring tube and the second measuring tube are used up, the first measuring tube and the second measuring tube can be rotated to drive the clamping plate at the bottom to rotate, so that the clamping grooves on both sides of the clamping plate correspond to the mounting blocks on the inner wall of the mounting ring, and then the clamping grooves are slid downward along the fixed blocks to push the first measuring tube and the second measuring tube into the receiving groove of the main machine, thereby protecting the first measuring tube and the second measuring tube and reducing the space occupied by the device for easy carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of the first measuring tube of the present invention.

[0024] Figure 3 This is a diagram showing the internal structure of the second measuring tube of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged view of point A.

[0026] Figure 5 It is a structural diagram of the connection between the chuck and the bottom ring of the present invention.

[0027] Figure 6 This is a diagram of the installation structure of the first measuring tube of the present invention.

[0028] Figure 7 This is a structural diagram of the connection between the clamping plate and the mounting ring of the present invention.

[0029] Figure 8 It is a top view of the clamping plate and the mounting ring of the present invention.

[0030] The accompanying drawings are marked as follows: 1. main unit; 11. digital meter; 12. timer; 13. storage slot; 2. first measuring tube; 21. first baffle; 22. piston; 23. through hole; 24. guide rod; 25. baffle; 26. measuring plate; 27. spring; 28. clamping plate; 29. ​​clamping slot; 3. second measuring tube; 31. fixing plate; 32. second baffle; 33. middle axis; 34. bottom ring; 341. steel block; 35. chuck; 351. electromagnet; 36. inner groove; 37. inner rod; 38. torsion spring; 4. mounting ring; 41. fixing block. DETAILED DESCRIPTION

[0031] 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 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.

[0032] according to Figure 1-2 A medical syringe pump and infusion pump measurement and calibration device shown in the figure comprises a main unit 1, a first measuring tube 2 is arranged at the upper end of the main unit 1, a second measuring tube 3 is arranged at the upper end of the main unit 1 on one side of the first measuring tube 2, a mounting ring 4 is sleeved on the bottom ends of the outer surfaces of the first measuring tube 2 and the second measuring tube 3, a first baffle 21 is movably mounted on the top end of the first measuring tube 2, a piston 22 is fixedly mounted inside the first measuring tube 2 below the first baffle 21, a through hole 23 is opened at the inner center of the piston 22, and the through hole 23 is conical in shape, a guide rod 24 is fixedly mounted inside the first measuring tube 2, a stopper 25 is fixedly mounted on the top end of the guide rod 24, a measuring plate 26 is sleeved on the outer surface of the guide rod 24, the measuring plate 26 is slidably connected to the guide rod 24, a spring 27 is sleeved on the outer surface of the guide rod 24 below the measuring plate 26, the top end of the spring 27 is fixedly connected to the measuring plate 26, and scales are arranged on the outer surfaces of the first measuring tube 2 and the second measuring tube 3.

[0033] The specific implementation method is as follows: when calibrating the output hydraulic pressure of the injection pump and the infusion pump, one end of the output tube of the injection pump or the infusion pump needs to be inserted into the through hole 23 of the piston 22. The through hole 23 in the piston 22 is an inverted cone, which can be suitable for gas pipes of different specifications. When performing a hydraulic test, it is necessary to start the stepper motor, and the output hydraulic pressure will push the measuring plate 26 in the first measuring tube 2, thereby squeezing the spring 27 on the guide rod 24 until the measuring plate 26 on the guide rod 24 stabilizes at a certain position, and then the pressure on the measuring plate 26 is calculated based on the length of the squeezing of the spring 27 by the measuring plate 26 and the coefficient of the spring 27 itself, thereby inferring the hydraulic pressure delivered by the stepper motor, and displaying the calculated data on the digital meter 11, and calibrating the hydraulic pressure delivered by the injection pump and the infusion pump through the data, reducing the influence of the external environment, thereby increasing the accuracy of the data.

[0034] according to Figure 3-5 A medical syringe pump and infusion pump measurement and calibration device shown in the figure, a fixing plate 31 is fixedly installed inside the second measuring tube 3, an opening is opened inside the fixing plate 31, a second baffle 32 is arranged at the top of the fixing plate 31, a central axis 33 is fixedly installed at one end inside the second baffle 32, the second baffle 32 is movably connected with the fixing plate 31 through the central axis 33, a bottom ring 34 is fixedly installed at the bottom end of the central axis 33, a chuck 35 is arranged inside the bottom ring 34, a steel block 341 is fixedly installed on the inner wall of the bottom ring 34, an electromagnet 351 is fixedly installed on the outer surface of the chuck 35, the input end of the electromagnet 351 is electrically connected to the output end of the timer 12, an inner groove 36 is opened inside the fixing plate 31 below the bottom ring 34, an inner rod 37 is fixedly installed inside the inner groove 36, the top end of the inner rod 37 is fixedly connected to the chuck 35, a torsion spring 38 is arranged on the outer surface of the inner rod 37, and the top end of the torsion spring 38 is fixedly connected to the bottom ring 34;

[0035] The specific implementation method is as follows: when measuring and calibrating the infusion rate of the medical syringe infusion pump, one end of the infusion tube needs to be inserted into the through hole 23 of the piston 22. At this time, the electromagnet 351 on the chuck 35 will be activated, and the steel block 341 on the bottom ring 34 will be attracted by the magnetic force of the electromagnet 351 and will rotate along the chuck 35 until the steel block 341 is adsorbed to the surface of the electromagnet 351. At the same time, the second baffle 32 is driven by the central axis 33 to open the opening on the fixed plate 31. At this time, the bottom ring 34 will drive the torsion spring 33 at the bottom end. 8. Squeeze the torsion spring 38 to input the liquid from the opening into the second measuring tube 3. At the same time, the timer 12 will count for one minute. After one minute, the electromagnet 351 will receive the signal from the timer 12 and close. At this time, the torsion spring 38 will drive the second baffle 32 back to its original position and close the opening to prevent the residual liquid in the infusion tube from continuing to enter the second measuring tube 3. Then observe the volume of the liquid to calculate the infusion rate, and then calibrate according to the test data to improve the accuracy of the calibration data.

[0036] according to Figure 6-8 A medical syringe pump and infusion pump measurement and calibration device is shown, wherein a digital meter 11 is fixedly installed at the front end of the host 1, and a timer 12 is fixedly installed at the front end of the host 1 on one side of the digital meter 11, and fixed blocks 41 are fixedly installed on both sides of the inner wall of the mounting ring 4, and a storage groove 13 is opened at the bottom end of the first measuring tube 2 and the second measuring tube 3 inside the host 1, and a clamping plate 28 is fixedly installed at the bottom end of the first measuring tube 2 and the second measuring tube 3, and a clamping groove 29 is opened at both ends of the clamping plate 28, and the clamping plate 28 matches the mounting ring 4, and the clamping groove 29 matches the fixed block 41;

[0037] The specific implementation method is as follows: after the first measuring tube 2 and the second measuring tube 3 are used up, the first measuring tube 2 and the second measuring tube 3 can be rotated to drive the clamping plate 28 at the bottom to rotate, so that the clamping grooves 29 on both sides of the clamping plate 28 correspond to the fixing blocks 41 on the inner wall of the mounting ring 4, and then the clamping grooves 29 are slid downward along the fixing blocks 41, and the first measuring tube 2 and the second measuring tube 3 are pushed into the storage groove 13 of the main unit 1, so as to protect the first measuring tube 2 and the second measuring tube 3, and at the same time reduce the space occupied by the device, so as to facilitate carrying; when they are needed, the first measuring tube 2 and the second measuring tube 3 are pulled up to move the clamping plate 28 above the fixing blocks 41 on the inner wall of the mounting ring 4, and then the first measuring tube 2 and the second measuring tube 3 are rotated to misalign the clamping grooves 29 on the clamping plate 28 with the fixing blocks 41, so as to clamp the first measuring tube 2 and the second measuring tube 3 and prevent them from sliding downward.

[0038] Working principle of the present invention:

[0039] Refer to the instruction manual Figure 1-2When calibrating the output hydraulic pressure of the syringe pump and the infusion pump, one end of the output tube of the syringe pump or the infusion pump needs to be inserted into the through hole 23 of the piston 22. The through hole 23 in the piston 22 is an inverted cone, which can be suitable for gas pipes of different specifications. When performing a hydraulic test, the stepper motor needs to be started, and the output hydraulic pressure will push the measuring plate 26 in the first measuring tube 2, thereby squeezing the spring 27 on the guide rod 24 until the measuring plate 26 on the guide rod 24 stabilizes at a certain position, and then the pressure on the measuring plate 26 is calculated according to the length of the squeezing of the spring 27 by the measuring plate 26 and the coefficient of the spring 27 itself, thereby measuring the blocking pressure in the infusion tube, and the calculated data is displayed on the digital meter 11;

[0040] Refer to the instruction manual Figure 3-5 When the infusion rate of the infusion pump is detected and calibrated, one end of the infusion tube needs to be inserted into the through hole 23 of the piston 22. At this time, the electromagnet 351 on the chuck 35 will be started. After the steel block 341 on the bottom ring 34 is attracted by the magnetic force of the electromagnet 351, it will rotate along the chuck 35 until the steel block 341 is adsorbed to the surface of the electromagnet 351. At the same time, the second baffle 32 is driven by the central axis 33 to open the opening on the fixed plate 31. At this time, the bottom ring 34 will drive the torsion spring 38 at the bottom end to squeeze the torsion spring 38 and input the liquid from the opening into the second measuring tube 3. At the same time, the timer 12 will count for one minute. After one minute, the electromagnet 351 will receive the signal of the timer 12 and close. At this time, the torsion spring 38 will drive the second baffle 32 back to its original position to close the opening to prevent the residual liquid in the infusion tube from continuing to enter the second measuring tube 3. Then the volume of the liquid is observed;

[0041] Refer to the instruction manual Figure 6-8 After the first measuring tube 2 and the second measuring tube 3 are used, the first measuring tube 2 and the second measuring tube 3 can be rotated to drive the clamping plate 28 at the bottom to rotate, so that the clamping grooves 29 on both sides of the clamping plate 28 correspond to the fixing blocks 41 on the inner wall of the mounting ring 4, and then the clamping grooves 29 are slid downward along the fixing blocks 41, and the first measuring tube 2 and the second measuring tube 3 are pushed into the storage groove 13 of the main machine 1 to protect the first measuring tube 2 and the second measuring tube 3. When they need to be used, the first measuring tube 2 and the second measuring tube 3 are pulled up to move the clamping plate 28 above the fixing blocks 41 on the inner wall of the mounting ring 4, and then the first measuring tube 2 and the second measuring tube 3 are rotated to misalign the clamping grooves 29 on the clamping plate 28 with the fixing blocks 41, and the first measuring tube 2 and the second measuring tube 3 are clamped to prevent them from sliding downward.

[0042] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0043] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0044] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical syringe pump and infusion pump measurement and calibration device, comprising a host (1), Features: A first measuring tube (2) is arranged at the upper end of the main machine (1); a second measuring tube (3) is arranged at the upper end of the main machine (1) and located on one side of the first measuring tube (2); and mounting rings (4) are sleeved on the bottom ends of the outer surfaces of the first measuring tube (2) and the second measuring tube (3); A first baffle (21) is movably mounted on the top of the first measuring tube (2); a piston (22) is fixedly mounted inside the first measuring tube (2) and located below the first baffle (21); a through hole (23) is provided at the center of the piston (22); the through hole (23) is conical in shape; a guide rod (24) is fixedly mounted inside the first measuring tube (2); a baffle (25) is fixedly mounted on the top of the guide rod (24); a measuring plate (26) is sleeved on the outer surface of the guide rod (24); the measuring plate (26) is slidably connected to the guide rod (24); a spring (27) is sleeved on the outer surface of the guide rod (24) and located below the measuring plate (26); the top of the spring (27) is fixedly connected to the measuring plate (26); and scales are provided on the outer surfaces of both the first measuring tube (2) and the second measuring tube (3); A fixing plate (31) is fixedly mounted inside the second measuring tube (3), an opening is provided inside the fixing plate (31), a second baffle (32) is arranged at the top end of the fixing plate (31), and a central shaft (33) is fixedly mounted at one end inside the second baffle (32); A digital meter (11) is fixedly mounted on the front end of the host (1), and a timer (12) is fixedly mounted on the front end of the host (1) and located on one side of the digital meter (11); The second baffle (32) is movably connected to the fixed plate (31) via a central axis (33), and a bottom ring (34) is fixedly mounted on the bottom end of the central axis (33); A chuck (35) is disposed inside the bottom ring (34), and a steel block (341) is fixedly mounted on the inner wall of the bottom ring (34); An electromagnet (351) is fixedly mounted on the outer surface of the chuck (35), and an input end of the electromagnet (351) is electrically connected to an output end of the timer (12); An inner groove (36) is formed inside the fixing plate (31) and is located below the bottom ring (34). An inner rod (37) is fixedly installed inside the inner groove (36). The top end of the inner rod (37) is fixedly connected to the chuck (35). A torsion spring (38) is provided on the outer surface of the inner rod (37), and the top end of the torsion spring (38) is fixedly connected to the bottom ring (34); Fixed blocks (41) are fixedly mounted on both sides of the inner wall of the mounting ring (4).

2. A medical syringe pump and infusion pump measurement and calibration device according to claim 1, Features: A storage groove (13) is provided inside the main unit (1) at the bottom ends of the first measuring tube (2) and the second measuring tube (3).

3. A medical syringe pump and infusion pump measurement and calibration device according to claim 1, Features: A clamping plate (28) is fixedly mounted on the bottom ends of the first measuring tube (2) and the second measuring tube (3), and clamping grooves (29) are provided at both ends of the clamping plate (28).

4. A medical syringe pump and infusion pump measurement and calibration device according to claim 3, Features: The clamping plate (28) matches the mounting ring (4), and the clamping groove (29) matches the fixing block (41).

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