CN107485762B - a syringe pump - Google Patents

Abstract

The purpose of the present invention is to provide a syringe pump for solving the technical problem of liquid medicine injection. It includes a pump body, an injection system, an emergency braking system and a control system. The pump body is provided with an injection cavity and an emergency braking cavity; the injection system includes a driving air pump, a reset air pump, a driving air pipe, and a reset air pressure. A pipe and a piston, the piston can be moved back and forth and installed in the injection cavity, and the piston divides the injection cavity into an air pressure cavity and a liquid storage cavity; the driving air pressure pipe and the reset air pressure pipe are respectively connected with the air pressure cavity to drive An air inlet electric control valve is arranged on the air pressure pipe, an air outlet electric control valve is arranged on the reset air pressure pipe, and the air inlet electric control valve and the air outlet electric control valve are respectively electrically connected with the control system. The invention has the beneficial effects of low noise, high reliability and safety.

Description

a syringe pump

technical field

The invention relates to the technical field of medical equipment, in particular to a syringe pump.

Background technique

Syringe pump is one of the commonly used medical equipment. In the existing technology, the syringe pump is composed of a stepping motor and its driver, a screw rod and a bracket, etc., and has a reciprocating screw and a nut, so it is also called a screw pump. The nut is connected with the piston of the syringe, and the liquid medicine is contained in the syringe to achieve high-precision, smooth and pulsation-free liquid transmission. However, the syringe pump in the prior art is noisy, and the reliability and safety still need to be improved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a syringe pump for solving the technical problem of liquid medicine injection.

The technical scheme adopted by the present invention to solve its technical problems is:

An injection pump, comprising a pump body, an injection system, an emergency braking system and a control system, wherein the pump body is provided with an injection cavity and an emergency braking cavity;

The injection system includes a drive air pump, a reset air pump, a drive air pipe, a reset air pipe and a piston, the piston can be moved back and forth in the injection cavity, and the piston divides the injection cavity into a pneumatic cavity and a liquid storage. The driving air pressure pipe and the reset air pressure pipe are respectively communicated with the air pressure cavity, the driving air pressure pipe is provided with an air inlet electric control valve, the reset air pressure pipe is provided with an air outlet electric control valve, and the air intake electric control valve and the air outlet electric control valve are arranged on the driving air pressure pipe. The valves are respectively electrically connected with the control system; the drive air pump and the reset air pump are respectively installed on the pump body, the air outlet end of the drive air pump is communicated with the drive air pipe, and the air intake end of the reset air pump is connected to the The reset air pressure pipe is communicated; an air pressure sensor is arranged in the air pressure cavity, and the air pressure sensor is electrically connected with the control system; an ultrasonic sensor is arranged in the liquid storage cavity, and the ultrasonic sensor is electrically connected with the control system; The liquid storage cavity is provided with a liquid outlet and a liquid inlet;

The emergency braking system includes a braking lever and an electromagnetic braking mechanism, the rear end of the braking lever is connected with the piston, the front end of the braking lever is located in the emergency braking chamber, and one side of the braking lever is Braking lobes are provided; a brake mounting plate is provided in the emergency braking cavity, and a braking through hole for passing a brake lever is provided on the braking mounting plate, and the electromagnetic braking mechanism is installed on the The electromagnetic brake mechanism includes a soft magnet, a brake plate and a brake return spring, the soft magnet is installed on one side of the brake through hole, a coil is wound around the soft magnet, and the coil passes through the brake The electrodynamic control switch is connected with the power supply, and the brake electronic control switch is electrically connected with the control system; the brake plate is installed on the other side of the brake through hole relative to the soft magnet, and the rear of the brake plate is installed on the other side of the soft magnet. The end is connected to the brake reset spring, and the rear end of the brake reset spring is mounted on the brake mounting plate through the fixing plate; the front end of the brake plate is provided with a brake card plate, and the brake card The outer end of the plate is provided with braking teeth, and the braking teeth are correspondingly arranged with the braking protruding teeth.

Further, both ends of the brake plate are provided with brake slide rails, the brake mounting plate is provided with a brake slide groove, and the brake slide rail is slidably installed in the brake slide groove.

Further, the soft magnet adopts a U-shaped structure.

Further, the device also includes a preheating system, the pump body is provided with a preheating cavity, and the preheating system is installed in the preheating cavity; the preheating system includes a preheating base plate, a preheating driving motor, and a preheating driving screw rod. , preheating driving nut, preheating driving slider, preheating plate and temperature sensor, the preheating base plate is installed in the preheating cavity, the two ends of the preheating base plate are provided with preheating mounting seats, the preheating drive The two ends of the screw rod are rotatably installed on the preheating mounting seat, and the upper end of the preheating base plate is provided with a preheating chute in the longitudinal direction; the preheating drive motor is electrically connected to the control system, and the preheating drive motor Installed on the preheating mounting seat, the power output end of the preheating driving motor is connected with the power input end of the preheating driving screw; the preheating driving screw nut is screwed on the preheating driving screw The preheating drive slide block is installed on the preheating drive nut, the lower end of the preheating drive slide block is provided with a preheating slide rail, and the preheating slide block is slidably installed on the preheating chute inside; the preheating plate is located outside the liquid storage cavity, one side of the preheating plate is connected to the preheating driving slider through a connecting frame, and a preheating electric control switch is provided on the power line of the preheating plate , the preheating electronic control switch is electrically connected with the control system; the temperature sensor is installed in the liquid storage chamber, and the temperature sensor is electrically connected with the control system.

Further, the preheating drive motor adopts a stepping motor.

Further, the preheating plate adopts an annular structure, and the preheating plate is sleeved outside the liquid storage cavity.

Further, the device also includes a self-cleaning system, and the pump body is provided with a self-cleaning cavity; the self-cleaning system includes a self-cleaning pump, a self-cleaning liquid inlet pipe, a self-cleaning liquid outlet pipe, a cleanliness detector, and a self-cleaning cavity. The inside is filled with cleaning liquid, the self-cleaning pump is installed on one side of the self-cleaning cavity, the liquid inlet end of the self-cleaning pump is connected with the self-cleaning cavity, and the liquid outlet port of the self-cleaning pump is connected with the self-cleaning liquid inlet pipe; The self-cleaning pump is electrically connected to the control system; the liquid outlet end of the self-cleaning liquid inlet pipe is connected to the liquid inlet on the liquid storage cavity, and the liquid inlet end of the self-cleaning liquid outlet pipe is connected to the The liquid outlet on the liquid storage cavity is connected; the cleanliness detector is connected with the self-cleaning liquid outlet pipe through a pipeline, and the cleanliness detector is electrically connected with the control system.

The effects provided in the summary of the invention are only the effects of the embodiments, rather than all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

The device adopts pneumatic propulsion injection process with low noise. The air pressure sensor set on the device can detect and ensure that the air pressure is within the controllable range, and when an unexpected situation occurs, the injection system can be stopped through the emergency braking system, with high reliability and safety. The preheating system set in the device can accurately preheat the position of the medicinal liquid, and realize the controllability of the preheating temperature, so that the patient is more comfortable during the injection process. The self-cleaning system in the device can clean the liquid storage chamber, which ensures the cleanliness of the device.

Description of drawings

1 is a schematic longitudinal cross-sectional view of an embodiment of the present invention;

Fig. 2 is A-A direction schematic diagram in Fig. 1;

Fig. 3 is a partial enlarged schematic diagram at A in Fig. 2;

In the figure: 1. Pump body; 2. Injection cavity; 3. Preheating cavity; 4. Self-cleaning cavity; 5. Drive air pump; 6. Reset air pump; 7. Drive air tube; 8. Reset air tube; 9 .Air pressure chamber; 10. Liquid storage chamber; 11. Piston; 12. Sealing ring; 13. Inlet electric control valve; 14. Air outlet electric control valve; 15. Air pressure sensor; 16. Ultrasonic sensor; 17. Liquid outlet; 18. Liquid inlet; 19. Brake lever; 20. Brake lobe; 21. Brake mounting plate; 22. Brake through hole; 23. Soft magnet; 24. Brake plate; 25. Brake return spring ; 26. Brake rail; 27. Brake chute; 28. Brake card; 29. Brake tooth; 30. Preheat the bottom plate; 31. Preheat the drive motor; 32. Preheat the drive screw; 33. Preheating drive nut; 34. Preheating drive slider; 35. Preheating plate; 36. Temperature sensor; 37. Preheating mounting seat; 38. Preheating chute; 39. Self-cleaning pump; 40. Control 41. Emergency brake chamber; 42. Fixed plate; 43. Liquid outlet port.

Detailed ways

In order to clearly illustrate the technical features of the solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and techniques are omitted from the present invention to avoid unnecessarily limiting the present invention.

As shown in Figures 1 to 3, a syringe pump includes a pump body 1, an injection system, a preheating system, an emergency braking system, a self-cleaning system and a control system. The pump body 1 is mainly used for installing other functional components. The pump body 1 is provided with an injection cavity 2 , a preheating cavity 3 , a self-cleaning cavity 4 and an emergency braking cavity 41 .

The injection system is used to squeeze and drive the medicinal liquid, so that the medicinal liquid can enter the human body smoothly; The piston 11 can be moved back and forth and is installed in the injection chamber 2, and the piston 11 divides the injection chamber 2 into the air pressure chamber 9 and the liquid storage chamber 10; the outer peripheral surface of the piston 11 is provided with a sealing ring 12 and The inner cavity wall of the injection cavity 2 is in close contact with each other. The driving air pressure pipe 7 and the reset air pressure pipe 8 are respectively installed at the rear end of the air pressure chamber 9 and communicate with the air pressure chamber 9; The air outlet electric control valve 14 is provided on the upper part, and the air intake electric control valve 13 and the air outlet electric control valve 14 are respectively electrically connected with the control system. The driving air pump 5 is installed at the rear end of the pump body 1 , and the air outlet end of the driving air pump 5 is communicated with the driving air pipe 7 through a pipeline. The power supply line for driving the air pressure pump 5 is provided with a driving electronic control switch, and the driving electronic control switch is electrically connected with the control system. The reset air pump 6 is installed at the rear end of the pump body 1 , and the intake end of the reset air pump 6 is communicated with the reset air pipe 8 through a pipeline. A reset electric control switch is provided on the power line of the reset air pressure pump 6, and the reset electric control switch is electrically connected with the control system. The rear end of the air pressure chamber 9 is provided with an air pressure sensor 15, the air pressure sensor 15 is used to detect the air pressure in the air pressure chamber 9, and the air pressure sensor 15 is electrically connected to the control system. When the air pressure sensor 15 detects that the air pressure exceeds a certain value, the control system stops driving the air pressure pump 5 to work, and closes the intake electric control valve 13; The air pressure is within the standard air pressure range, so as to achieve the stability of the air pressure in the air pressure chamber 9 , and then stably push the piston 11 . The front end of the liquid storage chamber 10 is provided with an ultrasonic sensor 16, and the ultrasonic sensor 16 is electrically connected to the control system; the ultrasonic sensor 16 is used to detect the distance between the front end of the piston 11 and the front end of the liquid storage chamber 10, so as to detect the liquid storage The storage of the medicinal liquid in the cavity 10, when the medicinal liquid is nearly exhausted, is controlled by the control system to drive the pneumatic pump 5 to stop working, and the control system alarms, and the control system is provided with an alarm. The front end of the liquid storage chamber 10 is provided with a liquid outlet 17, and the liquid outlet 17 is communicated with the injection pipeline through a pipeline. The liquid storage chamber 10 is provided with a liquid inlet 18, and the liquid inlet 18 is used to inject medicinal liquid into the liquid storage chamber 10; the liquid inlet 18 is provided with a liquid inlet valve.

When the air pressure in the air pressure chamber 9 is abnormal, the emergency braking system is used to brake the movement of the piston 11 to prevent discomfort to the human body caused by the injection process. The emergency braking system includes a brake lever 19 and an electromagnetic braking mechanism. The rear end of the brake lever 19 is connected to the front end of the piston 11 , and the front end of the brake lever 19 enters through the front end of the liquid storage chamber 10 . In the emergency brake chamber 41 , the brake rod 19 moves with the piston 11 . One side of the outer end of the braking rod 19 is provided with a row of braking protruding teeth 20 along the axial direction of the braking rod 19 , and the braking protruding teeth 20 are used in cooperation with the electromagnetic braking mechanism. A sealing member (such as a sealing ring) is provided between the brake rod 19 and the front-end cavity wall of the liquid storage cavity 10 to prevent leakage of the medicinal liquid. The emergency braking cavity 41 is provided with a braking mounting plate 21 , and the braking mounting plate 21 is provided with a braking through hole 22 for passing the braking rod 19 . The electromagnetic brake mechanism is installed on the brake mounting plate 21 to realize emergency braking of the brake lever 19 , thereby restricting the movement of the piston 11 . The electromagnetic brake mechanism includes a soft magnet 23, a brake plate 24 and a brake return spring 25. The soft magnet 23 is installed on one side of the brake through hole 22. The soft magnet 23 adopts a U-shaped structure, and the soft magnet 23 A coil is wound on the outside, and the coil is connected with the power source through a braking electric control switch, and the braking electric control switch is electrically connected with the control system. The brake plate 24 is installed on the other side of the brake through hole 22 relative to the soft magnet 23, the rear end of the brake plate 24 is connected to the brake return spring 25, and the brake return spring 25 passes through. The fixing plate 42 is mounted on the brake mounting plate 21 . Both ends of the brake plate 24 are provided with brake slide rails 26 , and the brake mounting plate 21 is provided with a brake slide groove 27 , and the brake slide rail 26 is slidably installed in the brake slide groove 27 . . The front end of the braking plate 24 is provided with a braking clamping plate 28 , and the outer end of the braking clamping plate 28 is provided with a braking clamping tooth 29 , the braking clamping tooth 29 and the braking protruding tooth 20 corresponding settings. When the electromagnetic brake mechanism needs to brake the brake lever 19, the coil of the soft magnet 23 is energized, the soft magnet 23 generates a magnetic force, and then attracts the brake plate 24, the brake return spring 25 is stretched, and the brake The locking teeth 29 are engaged with the braking protruding teeth 20 on the braking lever 19, and the braking lever 19 stops moving due to the locking action. When the brake lever 19 does not need to be braked, the coil is de-energized, the soft magnet 23 loses its magnetic force, and the brake plate 24 is disengaged from the brake lever 19 under the action of the reset force of the brake return spring 25 .

The preheating system is used to preheat the medicinal liquid in the liquid storage chamber 10, so that the medicinal liquid is preheated to a temperature close to the body temperature (about 37°), and the human body will be more comfortable during the infusion process. The preheating system is installed in the preheating cavity 3, and the preheating system includes a preheating base plate 30, a preheating driving motor 31, a preheating driving screw 32, a preheating driving screw nut 33, and a preheating driving slide. Block 34 , preheat plate 35 and temperature sensor 36 . The preheating base plate 30 is installed in the preheating cavity 3 , the two ends of the preheating base plate 30 are provided with a preheating mounting seat 37 , and the two ends of the preheating driving screw 32 are rotatably installed on the preheating mounting seat 37 The upper end of the preheating bottom plate 30 is provided with a preheating chute 38 in the longitudinal direction. The preheating drive motor 31 adopts a stepping motor, which is electrically connected to the control system. The preheating drive motor 31 is installed on the preheating mounting seat 37 on one side, and the power of the preheating drive motor 31 is The output end is connected to the power input end of the preheating driving screw 32 . The preheating driving nut 33 is screwed on the preheating driving screw 32 , the preheating driving slider 34 is installed on the preheating driving nut 33 , and the preheating driving slider 34 is The lower end is provided with a preheating slide rail, and the preheating slide block is slidably installed in the preheating chute 38 . The preheating plate 35 adopts an annular structure. The preheating plate 35 is sleeved on the outer side of the liquid storage chamber 10. One side of the preheating plate 35 is connected to the preheating driving slider 34 through a connecting frame. A preheating electric control switch is provided on the power line of the hot plate 35, and the preheating electric control switch is electrically connected with the control system. The temperature sensor 36 is installed in the liquid storage chamber 10, and the temperature sensor 36 is electrically connected to the control system for detecting the temperature of the medicinal liquid. When the temperature exceeds a certain value, the control system will disconnect all the liquids. The preheating electronic control switch described above stops the heating of the preheating plate 35 . The control system detects the distance between the front end of the piston 11 and the front end of the liquid storage chamber 10 according to the ultrasonic sensor 16 at the front end of the liquid storage chamber 10, so as to determine the position of the liquid medicine in the liquid storage chamber 10, and then controls the preheating drive motor 31 to drive the preheating plate. 35 Accurately heat the position of the medicinal liquid in the liquid storage chamber 10 .

After the injection is completed, the self-cleaning system is used to clean the interior of the liquid storage chamber 10 to ensure the cleaning of the liquid storage chamber 10. The self-cleaning system includes a self-cleaning pump 39, a self-cleaning liquid inlet pipe, a self-cleaning liquid outlet pipe and Cleanliness tester. The self-cleaning cavity 4 is used for containing cleaning liquid (such as clean water), and the self-cleaning cavity 4 is provided with a water inlet valve. The self-cleaning pump 39 is installed on one side of the self-cleaning chamber 4, the liquid inlet end of the self-cleaning pump 39 is communicated with the self-cleaning chamber 4 through a pipeline, and the liquid outlet port 43 of the self-cleaning pump 39 is connected to the self-cleaning chamber 4. The cleaning liquid inlet pipe is connected; the self-cleaning pump 39 is electrically connected with the control system. During the self-cleaning process, the liquid outlet end of the self-cleaning liquid inlet pipe is communicated with the liquid inlet 18 on the liquid storage chamber 10 ; the liquid inlet end of the self-cleaning liquid outlet pipe is connected to the liquid storage chamber 10 . The upper liquid outlet 17 is connected. The cleanliness detector is communicated with the self-cleaning liquid outlet pipe through a pipeline. The cleanliness detector is electrically connected to the control system for detecting whether the cleaned liquid meets the cleanliness requirement. When the cleaned liquid meets the cleanliness requirement, the control system stops the self-cleaning pump 39 from working.

The control system includes a control box 40, a controller, a control panel and a display mounted on the control box 40, and the control box 40 is mounted on one side of the pump body 1; The control panel and the display are electrically connected, and are electrically connected with the above-mentioned detection components and execution components. The control panel is provided with a plurality of corresponding control keys (such as start key, stop key, etc.), and the display is used to display the working state of the device in real time.

The advantages of the present invention are: the device adopts the pneumatic propulsion injection process, and the noise is small. The air pressure sensor set on the device can detect and ensure that the air pressure is within the controllable range, and when an unexpected situation occurs, the injection system can be stopped through the emergency braking system, with high reliability and safety. The preheating system set in the device can accurately preheat the position of the medicinal liquid, and realize the controllability of the preheating temperature, so that the patient is more comfortable during the injection process. The self-cleaning system in the device can clean the liquid storage chamber, which ensures the cleanliness of the device.

Except for the technical features described in the specification, they are all known technologies by those skilled in the art.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the scope of protection of the present invention. On the basis of the technical solutions of the present invention, those skilled in the art can make various Modifications or deformations are still within the protection scope of the present invention.

Claims (5)

1. The injection pump is characterized by comprising a pump body, an injection system, an emergency braking system and a control system, wherein an injection cavity and an emergency braking cavity are arranged on the pump body; the injection system comprises a driving pneumatic pump, a resetting pneumatic pump, a driving pneumatic tube, a resetting pneumatic tube and a piston, wherein the piston can be arranged in the injection cavity in a back-and-forth moving mode and divides the injection cavity into a pneumatic cavity and a liquid storage cavity; the driving air pressure pipe and the reset air pressure pipe are respectively communicated with the air pressure cavity, the driving air pressure pipe is provided with an air inlet electric control valve, the reset air pressure pipe is provided with an air outlet electric control valve, and the air inlet electric control valve and the air outlet electric control valve are respectively and electrically connected with the control system; the driving pneumatic pump and the resetting pneumatic pump are respectively arranged on the pump body, the air outlet end of the driving pneumatic pump is communicated with the driving pneumatic pipe, and the air inlet end of the resetting pneumatic pump is communicated with the resetting pneumatic pipe; an air pressure sensor is arranged in the air pressure cavity and is electrically connected with the control system; an ultrasonic sensor is arranged in the liquid storage cavity and is electrically connected with the control system; a liquid outlet and a liquid inlet are arranged on the liquid storage cavity; the emergency braking system comprises a braking rod and an electromagnetic braking mechanism, the rear end of the braking rod is connected with the piston, the front end of the braking rod is positioned in the emergency braking cavity, and one side of the braking rod is provided with a braking convex tooth; a brake mounting plate is arranged in the emergency brake cavity, a brake through hole for passing through a brake rod is arranged on the brake mounting plate, and the electromagnetic brake mechanism is arranged on the brake mounting plate; the electromagnetic braking mechanism comprises a soft magnet, a braking plate and a braking reset spring, wherein the soft magnet is arranged on one side of the braking through hole, a coil is wound outside the soft magnet, the coil is connected with a power supply through a braking electric control switch, and the braking electric control switch is electrically connected with the control system; the brake plate is arranged at the other side of the brake through hole relative to the soft magnet, the rear end of the brake plate is connected with the brake return spring, and the rear end of the brake return spring is arranged on the brake mounting plate through a fixing plate; the front end of the brake plate is provided with a brake clamping plate, the outer end of the brake clamping plate is provided with a brake latch, and the brake latch is arranged corresponding to the brake convex tooth;

the two ends of the brake plate are provided with brake sliding rails, the brake mounting plate is provided with a brake sliding groove, and the brake sliding rails are slidably mounted in the brake sliding groove;

the injection pump also comprises a preheating system, wherein a preheating cavity is arranged on the pump body, and the preheating system is arranged in the preheating cavity; the preheating system comprises a preheating bottom plate, a preheating driving motor, a preheating driving screw rod, a preheating driving screw nut, a preheating driving sliding block, a preheating plate and a temperature sensor, wherein the preheating bottom plate is arranged in the preheating cavity, preheating mounting seats are arranged at two ends of the preheating bottom plate, two ends of the preheating driving screw rod are rotatably arranged on the preheating mounting seats, and a preheating sliding groove is formed in the upper end of the preheating bottom plate in the longitudinal direction; the preheating driving motor is electrically connected with the control system, the preheating driving motor is installed on the preheating installation seat, and the power output end of the preheating driving motor is connected with the power input end of the preheating driving screw rod; the preheating driving screw nut is in threaded connection with the preheating driving screw rod, the preheating driving sliding block is installed on the preheating driving screw nut, a preheating sliding rail is arranged at the lower end of the preheating driving sliding block, and the preheating sliding block is installed in the preheating sliding groove in a sliding mode; the preheating plate is positioned at the outer side of the liquid storage cavity, one side of the preheating plate is connected with the preheating driving sliding block through a connecting frame, a preheating electric control switch is arranged on a power line of the preheating plate, and the preheating electric control switch is electrically connected with a control system; the temperature sensor is arranged in the liquid storage cavity and is electrically connected with the control system.

2. A syringe pump according to claim 1, wherein said soft magnet is of U-shaped configuration.

3. The syringe pump of claim 1 wherein said pre-heat drive motor is a stepper motor.

4. The syringe pump of claim 1 wherein said pre-heater plate is a circular ring and is disposed outside of said reservoir.

5. The syringe pump of claim 1, wherein the syringe pump further comprises a self-cleaning system, and the pump body is provided with a self-cleaning chamber; the self-cleaning system comprises a self-cleaning pump, a self-cleaning liquid inlet pipe, a self-cleaning liquid outlet pipe and a cleanliness detector, wherein a cleaning liquid is contained in the self-cleaning cavity; the self-cleaning pump is electrically connected with the control system; the liquid outlet end of the self-cleaning liquid inlet pipe is communicated with a liquid inlet on the liquid storage cavity, and the liquid inlet end of the self-cleaning liquid outlet pipe is communicated with a liquid outlet on the liquid storage cavity; the cleanliness detector is communicated with the self-cleaning liquid outlet pipe through a pipeline and is electrically connected with the control system.

Images