WO2021128686A1 - 一种泵头、压力泵及压力泵控制方法 - Google Patents

一种泵头、压力泵及压力泵控制方法 Download PDF

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Publication number
WO2021128686A1
WO2021128686A1 PCT/CN2020/088372 CN2020088372W WO2021128686A1 WO 2021128686 A1 WO2021128686 A1 WO 2021128686A1 CN 2020088372 W CN2020088372 W CN 2020088372W WO 2021128686 A1 WO2021128686 A1 WO 2021128686A1
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WO
WIPO (PCT)
Prior art keywords
piston
pressure pump
tube
liquid
pump
Prior art date
Application number
PCT/CN2020/088372
Other languages
English (en)
French (fr)
Inventor
刘辉
庞金伟
冷德嵘
李常青
奚杰峰
李宁
刘春俊
唐志
韦建宇
Original Assignee
南微医学科技股份有限公司
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Publication of WO2021128686A1 publication Critical patent/WO2021128686A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14216—Reciprocating piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring

Definitions

  • This application relates to the technical field of medical devices, and specifically to a pump head, a pressure pump, and a pressure pump control method.
  • the accuracy of the pressure pump for the smooth infusion of the liquid is relatively high.
  • the electronic control method is usually used to realize the technical problem of ensuring the smooth flow rate of the liquid during the piston steering process.
  • the disadvantage of this method is that the electronic control method is used.
  • the control accuracy is high, and whether the liquid flow rate can be stabilized depends on the precise control of the electronic equipment. Therefore, the accuracy of the circuit and the stability of the electrical equipment are required to be high.
  • the purpose of this application includes providing a pump head, a pressure pump, and a pressure pump control method, which can reduce the requirements for the control accuracy of electrical equipment, and reduce the cost of electrical equipment on the basis of ensuring smooth liquid infusion.
  • an embodiment provides a pump head, including a pump body, a piston, a piston rod, and an expandable first regulator tube;
  • the pump body has an inner cavity, the piston and the piston rod are located in the inner cavity, and the piston is connected with the piston rod, the piston is attached to the wall of the inner cavity, and the piston rod is configured to drive the piston to reciprocate relative to the inner cavity in a preset direction;
  • the piston divides the inner cavity into a first chamber and a second chamber;
  • the pump body is provided with a first discharge port corresponding to the first chamber and a second discharge port corresponding to the second chamber. mouth;
  • Both the first discharge port and the second discharge port are in communication with one end of the first zener tube, and the other end of the first zener tube is configured to communicate with the surgical instrument; the first zener tube is configured in an expanded state and a contracted state To compensate the pressure of the liquid in the first zener tube and reduce the flow change when the first zener tube continuously delivers liquid to the surgical instrument.
  • the pump head further includes a second stabilizing tube; the pump body is also provided with a first liquid inlet corresponding to the first chamber, and a second liquid inlet corresponding to the second chamber. Liquid inlet
  • the first liquid inlet and the second liquid inlet are both connected with one end of the second zener tube, the other end of the second zener tube is connected with the liquid tank, and the second zener tube is configured to switch between the expanded state and the contracted state , In order to compensate the liquid pressure in the second zener tube, and reduce the flow change when the second zener tube continuously delivers liquid to the first liquid inlet and the second liquid inlet.
  • the first voltage stabilizer tube and the second voltage stabilizer tube can be made of any one of an elastic plastic hose, a braided hose, or an elastic mesh tube.
  • the pump body further includes a first flow channel and a second flow channel
  • the first flow channel is connected with the first liquid discharge port and the second liquid discharge port at the same time, and the outlet of the first flow channel is connected with the first regulator tube;
  • the second flow channel is in communication with the first liquid inlet and the second liquid inlet at the same time, and the inlet of the second flow channel is in communication with the second stabilizing tube.
  • pipe joints are provided at the outlet of the first flow channel and the inlet of the second flow channel;
  • the pipe joint at the outlet of the first flow path is configured to be detachably connected with the first regulator tube;
  • the pipe joint at the entrance of the second flow channel is configured to be detachably connected with the second zener tube.
  • an embodiment provides a pressure pump, which includes a base, a driving mechanism, and the above-mentioned pump head;
  • the driving mechanism includes a driving motor and a sliding block connected with the output shaft of the driving motor.
  • the sliding block is drivingly connected with the piston rod so that the driving motor can drive the piston to reciprocate in a preset direction.
  • the pressure pump further includes a clamping structure
  • the clamping structure includes a clamping block connected with the slider and a clamping part connected with the piston rod;
  • the clamping part is configured to be clamped with the clamping block to restrict the piston rod from being separated from the slider along the preset direction.
  • the clamping block is provided with a clamping slot for clamping with the clamping portion, and the extending direction of the slot body of the clamping slot is perpendicular to the preset direction.
  • the pressure pump further includes a push-pull force sensor and a controller.
  • the push-pull force sensor is arranged at the connection between the clamping block and the slider, so as to be configured to detect the push-pull force exerted by the slider on the piston rod;
  • the push-pull force sensor and the drive motor are electrically connected to the controller, and the controller is configured to receive the push-pull force signal to control the pressure pump to stop running when the push-pull force exceeds the preset push-pull force range.
  • the pressure pump further includes a controller and a current sensor arranged on the circuit of the pressure pump, and the current sensor is configured to detect the current on the circuit of the pressure pump;
  • the current sensor and the drive motor are electrically connected to the controller, and the controller is configured to receive a current signal to control the pressure pump to stop running when the current exceeds the preset current range.
  • the pressure pump further includes a limit structure and a controller, and the limit structure includes a positioning block and two position sensors;
  • Both position sensors are connected to the base, and the two position sensors are arranged at intervals along a preset direction to form a detection area; the positioning block is connected to the slider and is located in the detection area;
  • the drive motor and the two position sensors are electrically connected to the controller.
  • the controller is configured to receive position signals to control the drive motor to reverse and drive the positioning block to move to the other end of the detection area after the positioning block moves to one end of the detection area .
  • the embodiments provide a pressure pump control method for controlling the above-mentioned pressure pump.
  • the pressure pump control method includes the following steps:
  • Control the driving motor to drive the piston to reciprocate in the pump head at a first preset speed to exhaust the pressure pump until the liquid output by the first regulator tube does not contain bubbles;
  • the driving motor is controlled to drive the piston to reciprocate in the pump head at a second preset speed in a preset direction, so that the first voltage regulator tube continuously outputs pressurized liquid.
  • the movement of the piston in the same direction in the pump head is a uniform movement.
  • the reciprocating movement of the piston in the pump head includes a first stroke and a second stroke
  • the reduced volume of the first chamber is the same as the increased volume of the second chamber; when the piston moves along the second stroke, the increased volume of the first chamber and the reduced volume of the second chamber the same;
  • the volume of the first chamber is the first volume; when the piston moves to the end of the second stroke, the volume of the second chamber is the second volume; the first volume and the second volume The volume is the same.
  • controlling the driving motor to drive the piston to reciprocate in the pump head at a first preset speed to exhaust the pressure pump until the liquid output by the first regulator tube does not contain bubbles includes:
  • Control the driving motor to drive the piston to move along the preset direction at the first preset speed, and drive the positioning block to move synchronously in the detection area;
  • the drive motor is controlled to drive the piston and positioning block to move in a direction opposite to the preset direction;
  • controlling the driving motor to drive the piston to reciprocate in the pump head along a preset direction at a second preset speed, so that the first regulator tube continuously outputs pressurized liquid includes:
  • the drive motor is controlled to drive the piston and positioning block to move in a direction opposite to the preset direction;
  • the driving motor is controlled to drive the piston and the positioning block to move in a preset direction.
  • the driving motor drives the piston to move relative to the pump head
  • the push-pull force sensor detects that the push-pull force applied to the piston rod exceeds the preset push-pull force range
  • the pressure pump is controlled to stop working.
  • the pressure pump when the current sensor detects that the current in the drive motor exceeds the preset current range, the pressure pump is controlled to stop working.
  • the pressure pump is connected to the first liquid discharge port and the second liquid discharge port on the pump body through the first regulator tube, so that the first liquid discharge port and the second liquid discharge port are discharged through the first stabilizer.
  • the expansion characteristic of the pressure tube itself can make the liquid in the first zener tube have a certain pressure through the expansion of the first zener tube during the non-reversing movement of the piston;
  • the pressure in the pressure pump decreases, and the discharge volume decreases.
  • the first zener tube itself switches between the expanded state and the contracted state, so that the body of the first zener tube shrinks or enlarges, thereby affecting the pressure in the first zener tube.
  • the liquid exerts a certain pressure to compensate for the liquid pressure and flow loss in the first zener tube, thereby reducing the change in the liquid flow rate in the first zener tube during the piston commutation process, so as to ensure the smooth output of the liquid Sex.
  • this solution can effectively reduce the requirements for the control accuracy of electrical equipment, so that on the basis of ensuring the smooth infusion of liquids, it can also reduce Cost of electrical equipment.
  • Fig. 1 is a schematic structural diagram of a pressure pump in an embodiment of the application from a first perspective
  • FIG. 2 is a schematic diagram of the structure of the pressure pump in the embodiment of the application from a second perspective
  • FIG. 3 is a schematic diagram of the structure of the pressure pump in the embodiment of the application from a third perspective
  • FIG. 4 is a schematic diagram of the structure of the pump head in the embodiment of the application.
  • FIG. 5 is a schematic diagram of the arrangement of the first voltage regulator tube in an embodiment of the application.
  • Figure 6 is a cross-sectional view of the pump head in the embodiment of the application from a first perspective
  • Figure 7 is a partial enlarged view at VII in Figure 6;
  • FIG. 8 is a cross-sectional view of the pump head in the embodiment of the application from a second perspective
  • Fig. 9 is a schematic structural diagram of a clamping structure in an embodiment of the application.
  • FIG. 10 is a schematic diagram of the structure of the card slot in an embodiment of the application.
  • Figure 11 is a partial enlarged view at XI in Figure 3.
  • Icon 100-pump head; 110-pump body; 120-piston; 130-piston rod; 140-first zener tube; 111-inner cavity; 112-first chamber; 113-second chamber; 114- The first liquid discharge port; 115-the second liquid discharge port; 150-the second regulator tube; 116-the first liquid inlet; 117-the second liquid inlet; 118-the first flow path; 119-the second flow path 160-pipe joint; 200-pressure pump; 210-base; 220-drive mechanism; 221-drive motor; 222-slider; 230-gripping structure; 231-gripping block; 232-gripping part; 233- Card slot; 240-push-pull force sensor; 250-controller; 260-current sensor; 270-limiting structure; 271-positioning block; 272-position sensor; 273-detection area.
  • Figures 1 to 3 show the structure of the pressure pump in the embodiment of the present application
  • Figures 4 to 8 show the structure of the pump head in the embodiment of the present application. It should be noted that, in order to further show the structure of the pressure pump, Figures 2 and 3 are based on Figure 1 with a part of the housing and other structures hidden.
  • This embodiment provides a pressure pump 200, which includes a base 210, a driving mechanism 220, and a pump head 100.
  • the pressure pump 200 can effectively reduce the requirements for the control accuracy of the electrical equipment, so that on the basis of ensuring the smooth infusion of the liquid, the cost of the electrical equipment can also be reduced.
  • the pump head 100 and the driving mechanism 220 are both connected to the base 210, and the driving mechanism 220 includes a driving motor 221 and a sliding block 222 that is drivingly connected to the output shaft of the driving motor 221.
  • the pump head 100 includes a pump body 110, a piston 120, a piston rod 130, and an expandable first regulator tube 140.
  • the pump body 110 has an inner cavity 111, the piston 120 and the piston rod 130 are located in the inner cavity 111, and the piston 120 is connected to the piston rod 130, and the wall of the piston 120 and the inner cavity 111 is attached Together.
  • the sliding block 222 is in transmission connection with the piston rod 130, so that the driving motor 221 drives the piston rod 130 to move, thereby driving the piston 120 to reciprocate relative to the inner cavity 111 in a preset direction.
  • the piston 120 located in the inner cavity 111 can divide the inner cavity 111 into a first chamber 112 and a second chamber 113.
  • the pump body 110 is provided with a first discharge port 114 corresponding to the first chamber 112. And a second liquid discharge port 115 correspondingly connected to the second chamber 113.
  • the first chamber 112 and the second chamber 113 are configured to store liquid, and the piston 120 moves relative to the pump head 100, thereby changing the first chamber 112 and The volume of the second chamber 113 in turn enables the first chamber 112 and the second chamber 113 to be pressurized by the piston 120 to discharge liquid from the first discharge port 114 and the second discharge port 115 respectively.
  • the pump head 100 is equipped with the first chamber 112 and the second chamber 113, during the operation of the pressure pump 200, with the relative movement of the piston 120, the first chamber 112 and the second chamber 113 can also be The second chamber 113 is switched between the liquid inlet state and the liquid state, and when the first chamber 112 is in the liquid state, the second chamber 113 is in the liquid state, and when the first chamber 112 is in the liquid state At this time, the second chamber 113 is in a draining state.
  • the pressure pump 200 can continuously output pressurized liquid.
  • first liquid discharge port 114 and the second liquid discharge port 115 are both in communication with one end of the first voltage stabilizer tube 140, and the other end of the first voltage stabilizer tube 140 is configured to communicate with the surgical instrument.
  • the first zener tube 140 is configured to switch between the expanded state and the contracted state to compensate for the pressure of the liquid in the first zener tube 140 and reduce the flow change when the first zener tube 140 continuously delivers liquid to the surgical instrument.
  • the first zener tube 140 Since the first zener tube 140 has the characteristics of being expandable, the first zener tube 140 can be converted from the expanded state to the contracted state, or from the contracted state to the expanded state, and in the process of its state transition, the first The zener tube 140 can compensate for the pressure of the first zener tube 140 to continuously deliver liquid to the surgical instrument, thereby stabilizing the pressure of the liquid in the first zener tube 140, thereby reducing the flow rate of the first zener tube 140 when the liquid is output. Therefore, the pressure pump 200 can continuously and stably output liquid.
  • the working principle of the pressure pump 200 is:
  • the pressure pump 200 includes a base 210, a driving mechanism 220 and a pump head 100.
  • the piston 120 and the piston rod 130 are both located in the inner cavity 111 of the pump head 100, and the piston 120 is connected with the piston rod 130, and the piston 120 is attached to the wall of the inner cavity 111.
  • the sliding block 222 is in transmission connection with the piston rod 130, so that the driving motor 221 drives the piston rod 130 to move, thereby driving the piston 120 to reciprocate relative to the inner cavity 111 in a preset direction, and through the movement of the piston 120 in the inner cavity 111, Thus, the liquid in the inner cavity 111 is pressurized.
  • the piston 120 located in the inner cavity 111 can divide the inner cavity 111 into the first cavity 112 and the second cavity 113, and the pump body 110 is provided with a first discharge port corresponding to the first cavity 112. 114, and the second liquid discharge port 115 corresponding to the second chamber 113, the first liquid discharge port 114 and the second liquid discharge port 115 are both connected to one end of the first zener tube 140, and the first zener tube The other end of 140 is configured to communicate with the surgical instrument.
  • the relative movement of the piston 120 in the inner cavity 111 changes the volume of the first chamber 112 and the second chamber 113, thereby making the first chamber 112 and the second chamber 112
  • liquid can be discharged from the first liquid discharge port 114 and the second liquid discharge port 115, respectively.
  • the liquid discharged through the first liquid discharge port 114 and the second liquid discharge port 115 enters the first surge tube 140.
  • the liquid in the first zener tube 140 can have a certain pressure through the expansion of the first zener tube 140 during the non-reversing movement of the piston 120; During the reversing process of the piston 120, the pressure in the pressure pump 200 decreases and the discharge volume decreases.
  • the first zener tube 140 itself changes from the expanded state to the contracted state, so that the body of the first zener tube 140 shrinks.
  • a certain pressure is applied to the liquid in the first zener tube 140 to compensate for the pressure and flow loss of the liquid in the first zener tube 140, thereby reducing the commutation of the piston 120 in the first zener tube 140
  • the flow rate of the liquid changes, so that the smoothness of the liquid output can be ensured.
  • the pump head 100 also includes a configuration A second zener tube 150 for injecting liquid into the first chamber 112 and the second chamber 113 is formed.
  • the pump body 110 When connecting the second stabilizer tube 150 to the pump body 110, the pump body 110 may be provided with a first liquid inlet 116 corresponding to the first chamber 112, and a first liquid inlet 116 corresponding to the second chamber 113.
  • Two liquid inlets 117; and the first liquid inlet 116 and the second liquid inlet 117 are both in communication with one end of the second stabilizer tube 150, and the other end of the second stabilizer tube 150 is in communication with the liquid tank.
  • the working principle of the second zener tube 150 is the same as that of the first zener tube 140.
  • the second zener tube 150 is configured to compensate for the second stabilizer by its own expandable characteristics when transitioning from the expanded state to the contracted state.
  • the pressure tube 150 continuously delivers the pressure of the liquid to the first liquid inlet 116 and the second liquid inlet 117, thereby reducing the liquid delivered from the second surge tube 150 to the first chamber 112 or the second chamber 113
  • the flow rate change of the pressure pump 200 reduces the flow rate change between the liquid inlet state of the first chamber 112 and the liquid state of the second chamber 113 during the working process of the pressure pump 200, so as to improve the working stability of the pressure pump 200.
  • the first voltage regulator tube 140 and the second voltage regulator tube 150 can be any of elastic plastic hoses, braided hoses or elastic net tubes. One made.
  • the first voltage stabilizer 140 and the second voltage stabilizer 150 can be made of elastic plastic hoses with different expansion coefficients, so as to meet the requirements of use under the condition of different requirements for the flow rate of the liquid. The scope of application of the pressure pump 200 is expanded.
  • the first voltage stabilizer tube 140 and the second voltage stabilizer tube 150 when the first voltage stabilizer tube 140 and the second voltage stabilizer tube 150 are connected to the pump body 110, the first voltage stabilizer tube 140 needs to be connected to the first liquid discharge port 114 and the first liquid discharge port 114 and the first liquid discharge port 114 and the pump body 110.
  • the second liquid discharge port 115 is correspondingly connected, and the second voltage stabilizing tube 150 needs to be correspondingly connected to the first liquid inlet 116 and the second liquid inlet 117, that is, the first voltage stabilizing pipe 140 and the second voltage stabilizing pipe 150 are connected to the pump body.
  • the connecting end of 110 needs to be connected to the two connection ports correspondingly. Based on this, in order to reduce the difficulty of connecting the first voltage stabilizer 140 and the second voltage stabilizer 150, a first flow channel 118 is provided on the pump body 110. And second runner 119.
  • the first flow passage 118 is in communication with the first discharge port 114 and the second discharge port 115 at the same time, and the first discharge port 114 and the second discharge port 115 are both configured to discharge pressurized liquid, so the first flow passage 118
  • the end communicating with the first discharge port 114 and the second discharge port 115 is the inlet of the first flow channel 118, and the outlet of the first flow channel 118 is connected with the first surge tube 140, so that the first flow channel 118 can be connected to
  • the pressurized liquid discharged from the first liquid discharge port 114 and the second liquid discharge port 115 functions as a confluence, so as to reduce the installation difficulty of the first regulator tube 140.
  • the second fluid channel 119 is in communication with the first fluid inlet 116 and the second fluid fluid inlet 117 at the same time, and the first fluid fluid inlet 116 and the second fluid fluid fluid inlet 117 are both configured to inject liquid, so the second fluid fluid channel
  • the end of 119 communicating with the first liquid inlet 116 and the second liquid inlet 117 is the outlet of the second flow passage 119, and the inlet of the second flow passage 119 is communicated with the second stabilizer tube 150 so as to pass through the second flow
  • the channel 119 can function as a confluence for the liquid entering the first liquid inlet 116 and the second liquid inlet 117, so as to reduce the installation difficulty of the second regulator tube 150.
  • the first voltage regulator tube 140 and the second voltage regulator tube 150 with different expansion coefficients may be used. Therefore, under different usage conditions, it is necessary to replace the first voltage regulator tube 140 and the second voltage regulator tube 150, thus, in order to facilitate the replacement of the first voltage regulator tube 140 and the second voltage regulator tube 150.
  • the outlet of the first flow passage 118 is provided with a pipe joint 160, and the pipe joint 160 at the outlet of the first flow passage 118 is configured to be detachably connected to the first surge tube 140; at the same time, the inlet of the second flow passage 119 is the same A pipe joint 160 is provided, and the pipe joint 160 at the entrance of the second flow channel 119 is configured to be detachably connected to the second zener tube 150.
  • FIG. 9 and FIG. 10 show the structure of the clamping structure in the embodiment of the present application.
  • the pressure pump 200 further includes a clamping structure 230.
  • a clamping effect can be formed at the connection between the slider 222 and the piston rod 130.
  • the transmission effect of the piston rod 130 and the sliding block 222 is prevented from disappearing.
  • the clamping structure 230 may include a clamping block 231 connected to the slider 222 and a clamping portion 232 connected to the piston rod 130;
  • the portion 232 is configured to be clamped with the clamping block 231 to restrict the piston rod 130 from being separated from the slider 222 in a predetermined direction.
  • the clamping structure 230 can prevent the slider 222 from being separated from the piston rod 130 in the preset direction.
  • 233 is clamped with the clamping portion 232, so the clamping block 231 is provided with a clamping slot 233 for clamping with the clamping portion 232, and the extending direction of the groove body of the clamping slot 233 is perpendicular to the preset direction.
  • the clamping portion 232 may be an annular groove provided on the end where the piston rod 130 is connected to the clamping block 231.
  • the clamping part 232 when the clamping part 232 is clamped to the card slot 233, the clamping part 232 is extended into the card slot 233 in a direction perpendicular to the preset direction relative to the clamping block 231, and is connected to the card slot 233.
  • the wall of 233 can be clamped.
  • clamping structure 230 may also be used.
  • the pressure pump 200 further includes a controller 250 and one or more of the following monitoring structures.
  • the pressure pump 200 further includes a push-pull force sensor 240, which is arranged at the connection between the clamping block 231 and the slider 222, so as to be configured to detect the push-pull force applied by the slider 222 to the piston rod 130; the push-pull force sensor Both 240 and the driving motor 221 are electrically connected to the controller 250, and the controller 250 is configured to receive a push-pull force signal to control the pressure pump 200 to stop running when the push-pull force exceeds a preset push-pull force range.
  • a push-pull force sensor 240 which is arranged at the connection between the clamping block 231 and the slider 222, so as to be configured to detect the push-pull force applied by the slider 222 to the piston rod 130
  • the push-pull force sensor Both 240 and the driving motor 221 are electrically connected to the controller 250, and the controller 250 is configured to receive a push-pull force signal to control the pressure pump 200 to stop running when the push-pull force exceeds a preset push
  • the function of the controller 250 is to obtain the push-pull force of the driving slider 222 on the piston rod 130 monitored by the push-pull force sensor 240 in real time, and compare the obtained real-time push-pull force value with the preset push-pull force range.
  • the pressure pump 200 works normally.
  • the real-time push-pull force exceeds the preset push-pull force range, it may be that there is a blockage or other conditions in the pipeline of the liquid.
  • the pressure pump 200 will be If the pressure is too high or the pressure is suddenly released after the blockage is broken, the pressure of the fluid will be too high, which will cause injury to the patient. Therefore, once the real-time push-pull force exceeds the preset push-pull force range, the controller 250 will The pressure pump 200 will be controlled to stop working, that is, the driving motor 221 will stop working, and the first regulator tube 140 will stop flowing out.
  • the pressure pump 200 also includes a current sensor 260 arranged on the circuit of the pressure pump 200.
  • the current sensor 260 is configured to detect the current of the driving motor 221; both the current sensor 260 and the driving motor 221 are electrically connected to the controller 250, and the controller 250 It is configured to receive a current signal to control the pressure pump 200 to stop running when the current exceeds the preset current range.
  • the function of the current sensor 260 is to know the circuit current of the pressure pump 200 in real time, and to compare the acquired real-time current with a preset current range.
  • the pressure pump 200 Works fine. Since the current of the drive motor 221 corresponds to the torque of the drive motor 221 and the corresponding load, it corresponds to the push-pull load of the drive slider 222 on the piston rod 130 plus the load of the entire drive assembly, and when the real-time current exceeds the preset current range , The equipment may be damaged. Therefore, in order to prevent the equipment from being damaged, in this case, the controller 250 will control the pressure pump 200 to stop working.
  • FIG. 11 shows the structure of the limiting structure in the embodiment of the present application.
  • the pressure pump 200 also includes a limit structure 270, which limits the movement of the piston 120.
  • the bit structure 270 includes a positioning block 271 and two position sensors 272.
  • the two position sensors 272 are both connected to the base 210, and the two position sensors 272 are arranged at intervals along a preset direction to form a detection area 273; the positioning block 271 is connected to the slider 222 and is located in the detection area 273.
  • the slider 222 is driven by the drive motor 221 to move in a preset direction, it will drive the positioning block 271 to move synchronously in the detection area 273.
  • the position of the positioning block 271 is determined by the two position sensors 272. Through detection, the movement state of the piston 120 at this time can be obtained.
  • the interval between the two position sensors 272 in the preset direction can be made consistent with the movement stroke of the piston 120, so that The movement of the positioning block 271 in the detection area 273 can reflect the movement of the piston 120 in the inner cavity 111 in real time.
  • the driving motor 221 and the two position sensors 272 are electrically connected to the controller 250.
  • the controller 250 is configured to receive the position signal of the positioning block 271 detected by the position sensor 272, so that after the positioning block 271 moves to one end of the detection area 273,
  • the driving motor 221 is controlled to reverse and drive the positioning block 271 to move to the other end of the detection area 273.
  • the present application also discloses a control method of the pressure pump 200.
  • the control method of the pressure pump 200 is configured to control the above-mentioned pressure pump 200, which includes The following steps:
  • the driving motor 221 is controlled to drive the piston 120 to reciprocate in the pump head 100 along a preset direction and at a second preset speed, so that the first regulator tube 140 continuously outputs pressurized liquid.
  • the controller 250 controls the driving motor 221 to perform the exhaust
  • the instructions are the same as when the pressurized liquid is continuously output.
  • the controller 250 needs two sets of instructions to correspond to each other.
  • the driving motor 221 is controlled to exhaust gas and continuously output the pressurized liquid.
  • the piston 120 of the pressure pump 200 drives the slider 222 to move through the drive motor 221 during the movement, and then drives the piston rod 130 to move through the slider 222, and then passes through the piston.
  • the movement of the rod 130 drives the relative movement of the piston 120 in the inner cavity 111, that is, in this process, in order to control the movement of the piston 120, it can be realized by controlling the working state of the driving motor 221, which can be controlled by The working state of the driving motor 221 makes the movement of the piston 120 in the same direction in the pump head 100 a uniform motion.
  • the reciprocating motion of the piston 120 in the pump head 100 includes a first stroke and a second stroke, and the direction of movement of the piston 120 in the same stroke remains unchanged, the movement of the piston 120 in the first stroke is a uniform motion, and the piston 120 moves at a constant speed during the first stroke. 120 moves at a constant speed in the second stroke.
  • the reduced volume of the first chamber 112 is the same as the increased volume of the second chamber 113; when the piston 120 moves along the second stroke, the increased volume of the first chamber 112 It is the same as the reduced volume of the second chamber 113.
  • the volume of the first chamber 112 is the first volume; when the piston 120 moves to the end of the second stroke, the volume of the second chamber 113 is the second volume; The volume is the same as the second volume.
  • the pressure pump 200 can have the same liquid intake and liquid output during the process of liquid intake and liquid discharge, so that the working stability of the pressure pump 200 can be improved.
  • the driving motor 221 is controlled to drive the piston 120 to reciprocate in the pump head 100 at a first preset speed to exhaust the pressure pump 200 until the liquid output by the first regulator tube 140 does not contain bubbles, It includes the following steps:
  • the driving motor 221 is controlled to drive the piston 120 and the positioning block 271 to move in a direction opposite to the preset direction;
  • the driving motor 221 is controlled to drive the piston 120 and the positioning block 271 to move in a preset direction;
  • the driving motor 221 When the driving motor 221 is controlled to drive the piston 120 to reciprocate in the pump head 100 at the second preset speed along the preset direction, so that the first voltage stabilizing tube 140 continuously outputs the pressurized liquid, it includes the following steps:
  • the driving motor 221 is controlled to drive the piston 120 and the positioning block 271 to move in a direction opposite to the preset direction;
  • the driving motor 221 is controlled to drive the piston 120 and the positioning block 271 to move in a preset direction.
  • the controller 250 can also detect the pushing and pulling force applied by the slider 222 to the piston rod 130.
  • the driving motor 221 drives the piston 120 to move relative to the pump head 100
  • the push-pull force sensor 240 detects that the push-pull force applied to the piston rod 130 exceeds the preset push-pull force range
  • the controller 250 controls the driving motor 221 stop working.
  • control The device 250 controls the pressure pump 200 to stop working, that is, the driving motor 221 stops working, and the first stabilizer tube 140 stops liquid discharge.
  • the controller 250 can also detect the current in the circuit.
  • the current sensor 260 detects that the current in the driving motor 221 exceeds the preset current range, the driving motor 221 is controlled to stop working to avoid equipment damage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

一种泵头（100）、压力泵（200）及压力泵控制方法。一种泵头（100），包括泵体（110）、活塞（120）、活塞杆（130）及可膨胀的第一稳压管（140）。活塞（120）及活塞杆（130）均位于泵体（110）的内腔（111）内，活塞（120）与活塞杆（130）连接并与内腔（111）的壁贴合，活塞杆（130）配置成带动活塞（120）相对于内腔（111）沿预设方向往复运动。活塞（120）将内腔（111）分隔为第一腔室（112）及第二腔室（113）；泵体（110）上设置有与第一腔室（112）对应导通的第一排液口（114），以及与第二腔室（113）对应导通的第二排液口（115）。第一排液口（114）及第二排液口（115）均与第一稳压管（140）的一端连通，第一稳压管（140）的另一端配置成与手术器械连通；第一稳压管（140）配置成在膨胀状态和收缩状态间转换，以补偿第一稳压管（140）内的液体压力，并降低第一稳压管（140）向手术器械连续输送液体时的流量变化。该泵头（100）、压力泵（200）及其控制方法能够在确保液体输注平稳的基础上，降低电气设备成本。

Description

一种泵头、压力泵及压力泵控制方法
相关申请的交叉引用
本申请要求于2019年12月27日提交中国专利局的申请号为CN201911375023.X、名称为“一种泵头、压力泵及压力泵控制方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及医疗器械技术领域，具体而言，涉及一种泵头、压力泵及压力泵控制方法。
背景技术
介入医疗过程中，对于压力泵液体平稳输注精度要求较高，而现有技术中通常采用电子控制方式实现活塞转向过程中确保液体流速平稳这一技术问题，这一方式的缺陷在于，对于电子控制精度要求高，是否能够实现液体流速平稳依赖电子设备的精确控制，因此对于电路的精度、电气设备的稳定性要求较高。
发明内容
本申请的目的包括，提供了一种泵头、压力泵及压力泵控制方法，其能够降低对电气设备控制精度的要求，在确保液体输注平稳的基础上降低了电气设备成本。
本申请的实施例可以这样实现：
第一方面，实施例提供一种泵头，包括泵体、活塞、活塞杆及可膨胀的第一稳压管；
泵体具备内腔，活塞及活塞杆均位于内腔内，且活塞与活塞杆连接，活塞与内腔的壁贴合，活塞杆配置成带动活塞相对于内腔沿预设方向往复运动；
活塞将内腔分隔为第一腔室及第二腔室；泵体上设置有与第一腔室对应导通的第一排液口，以及与第二腔室对应导通的第二排液口；
第一排液口及第二排液口均与第一稳压管的一端连通，第一稳压管的另一端配置成与手术器械连通；第一稳压管配置成在膨胀状态和收缩状态间转换，以补偿第一稳压管内的液体压力，降低第一稳压管向手术器械连续输送液体时的流量变化。
在可选的实施方式中，泵头还包括第二稳压管；泵体上还设置有与第一腔室对应导通的第一进液口，以及与第二腔室对应导通第二进液口；
第一进液口及第二进液口均与第二稳压管的一端连通，第二稳压管的另一端与液体箱连通，第二稳压管配置成在膨胀状态和收缩状态间转换，以补偿第二稳压管内的液体压力，并降低第二稳压管向第一进液口及第二进液口连续输送液体时的流量变化。
在可选的实施方式中，第一稳压管及第二稳压管均可采用弹性塑料软管、编织软管或弹性网管中的任意一种制成。
在可选的实施方式中，泵体还包括第一流道及第二流道；
第一流道同时与第一排液口及第二排液口连通，第一流道的出口与第一稳压管连通；
第二流道同时与第一进液口及第二进液口连通，第二流道的入口与第二稳压管连通。
在可选的实施方式中，第一流道的出口处及第二流道的入口处均设置有管接头；
第一流道的出口处的管接头配置成与第一稳压管可拆卸地连接；
第二流道的入口处的管接头配置成与第二稳压管可拆卸地连接。
第二方面，实施例提供一种压力泵，压力泵包括底座、驱动机构以及上述的泵头；
泵头及驱动机构均与底座连接，驱动机构包括驱动电机以及与驱动电机的输出轴传动连接的滑块，滑块与活塞杆传动连接，以使得驱动电机可带动活塞沿预设方向往复运动。
在可选的实施方式中，压力泵还包括卡紧结构；
卡紧结构包括与滑块连接的卡接块，以及与活塞杆连接的卡紧部；
卡紧部配置成与卡接块卡接，以限制活塞杆沿预设方向与滑块脱离。
在可选的实施方式中，卡接块上设置有与卡紧部卡接的卡槽，卡槽的槽体延伸方向与预设方向垂直。
在可选的实施方式中，压力泵还包括推拉力传感器及控制器，推拉力传感器设置在卡接块与滑块的连接处，以配置成检测滑块施加至活塞杆上的推拉力；
推拉力传感器及驱动电机均与控制器电连接，控制器配置成接收推拉力信号，以在推拉力超出预设推拉力范围后控制压力泵停止运行。
在可选的实施方式中，压力泵还包括控制器及设置在压力泵的电路上的电流传感器，电流传感器配置成检测压力泵的电路上的电流；
电流传感器及驱动电机均与控制器电连接，控制器配置成接收电流信号，以在电流超出预设电流范围后控制压力泵停止运行。
在可选的实施方式中，压力泵还包括限位结构及控制器，限位结构包括定位块以及两个位置传感器；
两个位置传感器均与底座连接，且两个位置传感器沿预设方向间隔布置，以形成检测区域；定位块与滑块连接，并位于检测区域内；
驱动电机及两个位置传感器均与控制器电连接，控制器配置成接收位置信号，以在定位块运动至检测区域的一端后，控制驱动电机反转并带动定位块向检测区域的另一端运动。
第三方面，实施例提供一种压力泵控制方法，用于对上述的压力泵进行控制，压力泵控制方法包括以下步骤：
控制驱动电机带动活塞以第一预设速度在泵头中往复运动，以对压力泵进行排气，直至第一稳压管输出的液体中不含有气泡；
控制驱动电机带动活塞沿预设方向以第二预设速度在泵头中往复运动，以使得第一稳压管持续输出加压液体。
在可选的实施方式中，活塞在泵头中沿同一方向的运动为匀速运动。
在可选的实施方式中，活塞在泵头中的往复运动包括第一行程及第二行程；
活塞在沿第一行程运动时，第一腔室减少的体积与第二腔室增加的体积相同；活塞在沿第二行程运动时，第一腔室增加的体积与第二腔室减少的体积相同；
当活塞运动至第一行程的终点时，第一腔室的容积为第一容积；当活塞运动至第二行程的终点时，第二腔室的容积为第二容积；第一容积与第二容积相同。
在可选的实施方式中，控制驱动电机带动活塞以第一预设速度在泵头中往复运动，以对压力泵进行排气，直至第一稳压管输出的液体中不含有气泡包括：
控制驱动电机带动活塞沿预设方向以第一预设速度运动，带动定位块在检测区域中同步运动；
当检测区域中的一个位置传感器检测到定位块运动至检测区域的一端后，控制驱动电机带动活塞及定位块沿与预设方向相反的方向运动；
当检测区域中的另一个位置传感器检测到定位块运动至检测区域的另一端后，控制驱动电机带动活塞及定位块沿预设方向运动；
直至第一稳压管输出的液体中不含有气泡。
在可选的实施方式中，控制驱动电机带动活塞沿预设方向以第二预设速度在泵头中往复运动，以使得第一稳压管持续输出加压液体包括：
控制驱动电机带动活塞沿预设方向运动以第二预设速度运动，带动定位块在检测区域中同步运动；
当检测区域中的一个位置传感器检测到定位块运动至检测区域的一端后，控制驱动电机带动活塞及定位块沿与预设方向相反的方向运动；
当检测区域中的另一个位置传感器检测到定位块运动至检测区域的另一端后，控制驱动电机带动活塞及定位块沿预设方向运动。
在可选的实施方式中，当驱动电机带动活塞相对于泵头运动时，当推拉力传感器检测到施加至活塞杆上的推拉力超出预设推拉力范围后，控制压力泵停止工作。
在可选的实施方式中，当电流传感器检测到驱动电机中的电流超出预设电流范围后，控制压力泵停止工作。
本申请实施例的有益效果包括：
该压力泵通过第一稳压管与泵体上的第一排液口及第二排液口连接，以在第一排液口及第二排液口排液的过程中，通过第一稳压管自身的可膨胀特性，以在活塞非换向运动过程中，通过第一稳压管的膨胀，使得第一稳压管中的液体具有一定压力；而在活塞换向的过程中，由于压力泵内的压力降低，排液量减小，第一稳压管本身在膨胀状态和收缩状态间转换，使得第一稳压管管体缩小或增大，从而对第一稳压管中的液体施加一定的压力，以补偿第一稳压管中的液体压力和流量损失，由此减小在活塞换向的过程中第一稳压管中的液体流量变化，从而能够确保液体输出的平稳性。
此外，相对于现有技术中采用提高电子设备的精度及电气设备的稳定性的方式，该方案能够有效降低对电气设备控制精度的要求，从而在确保液体输注平稳的基础上，还能够降低电气设备成本。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范 围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请实施例中压力泵在第一视角的结构示意图；
图2为本申请实施例中压力泵在第二视角的结构示意图；
图3为本申请实施例中压力泵在第三视角的结构示意图；
图4为本申请实施例中泵头的结构示意图；
图5为本申请实施例中第一稳压管的设置示意图；
图6为本申请实施例中泵头在第一视角的剖视图；
图7为图6中Ⅶ处的局部放大图；
图8为本申请实施例中泵头在第二视角的剖视图；
图9为本申请实施例中卡紧结构的结构示意图；
图10为本申请实施例中卡槽的结构示意图；
图11为图3中Ⅺ处的局部放大图。
图标：100-泵头；110-泵体；120-活塞；130-活塞杆；140-第一稳压管；111-内腔；112-第一腔室；113-第二腔室；114-第一排液口；115-第二排液口；150-第二稳压管；116-第一进液口；117-第二进液口；118-第一流道；119-第二流道；160-管接头；200-压力泵；210-底座；220-驱动机构；221-驱动电机；222-滑块；230-卡紧结构；231-卡接块；232-卡紧部；233-卡槽；240-推拉力传感器；250-控制器；260-电流传感器；270-限位结构；271-定位块；272-位置传感器；273-检测区域。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚和完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本申请的描述中，需要说明的是，若出现术语“上”、“下”、“内”或“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位或者必须以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，若出现术语“第一”或“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
需要说明的是，在不冲突的情况下，本申请的实施例中的特征可以相互结合。
请参考图1-图8，图1-图3示出了本申请实施例中压力泵的结构，图4-图8示出了本申请实施例中泵头的结构。需要说明的是，为便于进一步展示压力泵的结构，图2及图3是在图1的基础上中隐藏了部分壳体等结构。
本实施例提供了一种压力泵200，其包括底座210、驱动机构220以及泵头100。该压力泵200能够有效降低对电气设备控制精度的要求，从而在确保液体输注平稳的基础上，还能够降低电气设备成本。
其中，请参照图1-图3，泵头100及驱动机构220均与底座210连接，驱动机构220包括驱动电机221以及与驱动电机221的输出轴传动连接的滑块222。请参照图4及图5，泵头100包括泵体110、活塞120、活塞杆130及可膨胀的第一稳压管140。
具体地，请参照图6及图7，泵体110具备内腔111，活塞120及活塞杆130均位于内腔111内，且活塞120与活塞杆130连接，活塞120与内腔111的壁贴合。并且滑块222与活塞杆130传动连接，以使得驱动电机221通过带动活塞杆130运动，进而带动活塞120相对于内腔111沿预设方向往复运动。
需要说明的是，活塞杆130的轴线方向与预设方向重合。
位于内腔111中的活塞120可将内腔111分隔为第一腔室112及第二腔室113，泵体110上设置有与第一腔室112对应导通的第一排液口114，以及与第二腔室113对应导通的第二排液口115。在该压力泵200正常工作的过程中，第一腔室112及第二腔室113内均配置成存储液体，并通过活塞120相对于泵头100的运动，从而通过改变第一腔室112及第二腔室113的体积，进而使得第一腔室112及第二腔室113能够在受到活塞120的加压作用后，液体分别由第一排液口114及第二排液口115排出。
需要说明的是，由于泵头100具备第一腔室112及第二腔室113，故在该压力泵200工作的过程中，随着活塞120的相对运动，还能够使得第一腔室112和第二腔室113在进液状态和排液状态间转换，并且当第一腔室112处于排液状态时，第二腔室113处于进液状态，而当第一腔室112处于进液状态时，第二腔室113处于排液状态。由此，使得该压力泵200能够连续输出加压液体。
进一步地，第一排液口114及第二排液口115均与第一稳压管140的一端连通，第一稳压管140的另一端配置成与手术器械连通。第一稳压管140配置成在膨胀状态和收缩状态间转换，以补偿第一稳压管140内的液体压力，降低第一稳压管140向手术器械连续输送液体时的流量变化。
由于第一稳压管140具备可膨胀的特性，从而使得第一稳压管140能够由膨胀状态向收缩状态转换，或由收缩状态向膨胀状态转换，并在其状态转换的过程中，第一稳压管140能够补偿第一稳压管140向手术器械连续输送液体的压力，由此能够稳定第一稳压管140内的液体压力，进而能够降低第一稳压管140输出液体时的流量变化，从而能够保证该压力泵200连续稳定的输出液体。
该压力泵200的工作原理是：
该压力泵200包括底座210、驱动机构220以及泵头100。活塞120及活塞杆130均位于泵头100的内腔111内，且活塞120与活塞杆130连接，活塞120与内腔111的壁贴合。滑块222与活塞杆130传动连接，以使得驱动电机221通过带动活塞杆130运动，进而带动活塞120相对于内腔111沿预设方向往复运动，并通过活塞120在内腔111中的运动， 从而对内腔111中的液体进行加压。
另外，位于内腔111中的活塞120可将内腔111分隔为第一腔室112及第二腔室113，泵体110上设置有与第一腔室112对应导通的第一排液口114，以及与第二腔室113对应导通的第二排液口115，第一排液口114及第二排液口115均与第一稳压管140的一端连通，第一稳压管140的另一端配置成与手术器械连通。
在该压力泵200正常工作的过程中，通过活塞120在内腔111的相对的运动，从而通过改变第一腔室112及第二腔室113的体积，进而使得第一腔室112及第二腔室113能够在受到活塞120的加压作用后，液体分别由第一排液口114及第二排液口115排出。经第一排液口114及第二排液口115排出的液体会进入至第一稳压管140中。通过第一稳压管140自身的可膨胀特性，能够在活塞120非换向运动过程中，通过第一稳压管140的膨胀，使得第一稳压管140中的液体具有一定压力；而在活塞120换向的过程中，由于压力泵200内的压力降低，排液量减小，第一稳压管140本身由膨胀状态向收缩状态转换，使得第一稳压管140管体缩小，从而对第一稳压管140中的液体施加一定的压力，以补偿第一稳压管140中的液体压力和流量损失，由此减小在活塞120换向的过程中第一稳压管140中液体的流量变化，从而能够确保液体输出的平稳性。
进一步地，请参照图4及图5，在本实施例中，在压力泵200工作的过程中，为保证压力泵200中的液体加压以及排液过程能够连续，故泵头100还包括配置成向第一腔室112及第二腔室113注入液体的第二稳压管150。
在将第二稳压管150与泵体110连接时，可以在泵体110设置与第一腔室112对应导通的第一进液口116，以及与第二腔室113对应导通的第二进液口117；并且第一进液口116及第二进液口117均与第二稳压管150的一端连通，第二稳压管150的另一端与液体箱连通。
此外，第二稳压管150与第一稳压管140的工作原理相同，第二稳压管150配置成在由膨胀状态向收缩状态转换时，其通过自身的可膨胀特性，补偿第二稳压管150向第一进液口116及第二进液口117连续输送液体的压力，进而能够减小由第二稳压管150输送至第一腔室112或第二腔室113中的液体的流量变化，从而降低压力泵200工作过程中第一腔室112进液状态和第二腔室113进液状态间的流量变化，以提高压力泵200的工作稳定性。
综上，在设置第一稳压管140及第二稳压管150时，第一稳压管140及第二稳压管150均可采用弹性塑料软管、编织软管或弹性网管中的任意一种制成。并且根据实际的使用需求，可以采用由不同膨胀系数的弹性塑料软管制作第一稳压管140和第二稳压管150，以在出液流量需求不同的情况下，满足使用的需求，进而扩大该压力泵200的适用范围。
进一步地，请参照图8并结合图4，在将第一稳压管140及第二稳压管150与泵体110连通时，第一稳压管140需要与第一排液口114及第二排液口115对应连通，而第二稳压管150需要与第一进液口116及第二进液口117对应连通，即第一稳压管140及第二稳压管150与泵体110连通的一端，均需要与两个连接口对应导通，基于此，为降低第一稳压管140及第二稳压管150的连接难度，故在泵体110上设置有第一流道118及第二流道119。
其中，第一流道118同时与第一排液口114及第二排液口115连通，而第一排液口114及第二排液口115均配置成排出加压液体，故第一流道118与第一排液口114及第二排液口115连通的一端为第一流道118的入口，而第一流道118的出口则与第一稳压管140连通，从而通过第一流道118能够对第一排液口114及第二排液口115排出的加压液体起到汇流的作用，以降低第一稳压管140的安装难度。
同理，第二流道119同时与第一进液口116及第二进液口117连通，而第一进液口116及第二进液口117均配置成注入液体，故第二流道119与第一进液口116及第二进液口117连通的一端为第二流道119的出口，而第二流道119的入口则与第二稳压管150连通，从而通过第二流道119能够对进入第一进液口116及第二进液口117的液体起到汇流的作用，以降低第二稳压管150的安装难度。
进一步地，在设置有第一流道118及第二流道119的基础上，由于在不同的使用条件下，可能会用到不同膨胀系数的第一稳压管140及第二稳压管150，由此，不同的使用条件下，需要更换第一稳压管140及第二稳压管150，由此，为便于更换第一稳压管140及第二稳压管150。
故第一流道118的出口处设置有管接头160，第一流道118的出口处的管接头160配置成与第一稳压管140可拆卸地连接；同时，第二流道119的入口处同样设置有管接头160，第二流道119的入口处的管接头160配置成与第二稳压管150可拆卸地连接。通过将第一稳压管140及第二稳压管150与泵体110的可拆卸地连接，能够简化第一稳压管140及第二稳压管150与泵体110的连接步骤，从而能够提高第一稳压管140及第二稳压管150的安装效率。
请参照图3、图9及图10，图9及图10示出了本申请实施例中卡紧结构的结构。
该压力泵200在工作的过程中，活塞120是在滑块222的驱动作用下在内腔111中运动，由此，在滑块222驱动活塞120运动时，为保证运动的稳定性，需要提高滑轨与活塞杆130的连接稳定性，由此，该压力泵200还包括卡紧结构230，通过设卡紧结构230能够在滑块222与活塞杆130的连接处形成卡紧作用，进而能够在运动的过程中防止活塞杆130与滑块222的传动作用消失。
具体地，在设置卡紧结构230时，在本实施例中，卡紧结构230可以包括与滑块222连接的卡接块231，以及与活塞杆130连接的卡紧部232；其中，卡紧部232配置成与卡接块231卡接，以限制活塞杆130沿预设方向与滑块222脱离。
由于滑块222需要驱动活塞杆130沿预设方向运动，故卡紧结构230能够满足防止滑块222沿预设方向与活塞杆130脱离即可，故在设置卡槽233时，为便于卡槽233与卡紧部232的卡接，故卡接块231上设置有与卡紧部232卡接的卡槽233，且卡槽233的槽体延伸方向与预设方向垂直。而卡紧部232可以是设置在活塞杆130与卡接块231连接的一端上的环形槽。这样的设置方式，在将卡紧部232与卡槽233卡紧时，通过将卡紧部232相对于卡接块231沿与预设方向垂直的方向伸入卡槽233内，并与卡槽233的壁卡接即可。
需要说明的是，在本申请的其他实施例中，为实现活塞杆130与滑块222的卡接效果，还可采用其他形式的卡紧结构230。
进一步地，请参照图1-图3，在本实施例中，在压力泵200的工作的过程中，还存在其他因素导致该压力泵200的工作出现异常，为对该压力泵200的工作状态进行监测，该压力泵200还包括控制器250及以下监测结构中的一个或多个。
首先，压力泵200还包括推拉力传感器240，推拉力传感器240设置在卡接块231与滑块222的连接处，以配置成检测滑块222施加至活塞杆130上的推拉力；推拉力传感器240及驱动电机221均与控制器250电连接，控制器250配置成接收推拉力信号，以在推拉力超出预设推拉力范围后控制压力泵200停止运行。
需要说明的是，控制器250的作用是实时获知推拉力传感器240监测的驱动滑块222对活塞杆130的推拉力，并且通过将获取的实时推拉力值与预设推拉力范围进行对比，当 实时推拉力在预设推拉力范围内时，该压力泵200工作正常。而当实时推拉力超出预设推拉力范围时，其有可能是在出液的管路的中存在阻塞或其他情况，而在出现这一的情况后，若压力泵200持续工作，会因为施加的压力过大或者在阻塞破除后产生突然间的压力释放，造成出液的压力过大，进而对病人造成伤害，故一旦出现实时推拉力超出预设推拉力范围的情况时，控制器250便会控制该压力泵200停止工作，即驱动电机221停止工作，第一稳压管140停止出液。
其次，压力泵200还包设置在压力泵200的电路上的电流传感器260，电流传感器260配置成检测驱动电机221的电流；电流传感器260及驱动电机221均与控制器250电连接，控制器250配置成接收电流信号，以在电流超出预设电流范围后控制压力泵200停止运行。
需要说明的是，电流传感器260的作用是实时获知压力泵200的电路电流，并且通过将获取的实时电流与预设电流范围进行对比，当实时电流在预设电流范围内时，该压力泵200工作正常。由于驱动电机221的电流大小对应驱动电机221的扭矩大小和对应的负载大小，对应驱动滑块222对活塞杆130的推拉力负载加上整个驱动组件负载，而当实时电流超出预设电流范围时，便有可能出现设备损坏，故为防止设备出现损坏，故在此情况下，控制器250便会控制压力泵200停止工作。
进一步地，请参照图2、图3及图11，图11示出了本申请实施例中限位结构的结构。
在活塞120运动的过程中，其在滑块222的驱动作用下，在内腔111中往复运动，为对活塞120的运动往复起到控制作用，故压力泵200还包括限位结构270，限位结构270包括定位块271以及两个位置传感器272。
两个位置传感器272均与底座210连接，且两个位置传感器272沿预设方向间隔布置，以形成检测区域273；定位块271与滑块222连接，并位于检测区域273内。当滑块222在驱动电机221的驱动作用下，沿预设方向运动时，便会带动定位块271在检测区域273中同步运动，由此，通过两个位置传感器272对定位块271的位置的检测，便可得出此时活塞120的运动状态。
需要说明的是，在本实施例中，为对活塞120在内腔111中的运动进行监控，故可以使得两个位置传感器272在预设方向上的间隔与活塞120的运动行程一致，从而使得定位块271在检测区域273中的运动能够实时反映出活塞120在内腔111中的运动。
驱动电机221及两个位置传感器272均与控制器250电连接，控制器250配置成接收位置传感器272检测到的定位块271的位置信号，以在定位块271运动至检测区域273的一端后，控制驱动电机221反转并带动定位块271向检测区域273的另一端运动。
进一步地，请再次参照图1-图11，基于上述的压力泵200，本申请还公开了一种压力泵200控制方法，该压力泵200控制方法配置成对上述压力泵200进行控制，其包括以下步骤：
控制驱动电机221带动活塞120以第一预设速度在泵头100中往复运动，以对压力泵200进行排气，直至第一稳压管140输出的液体中不含有气泡；
控制驱动电机221带动活塞120沿预设方向以第二预设速度在泵头100中往复运动，以使得第一稳压管140持续输出加压液体。
需要说明的是，在设置第一预设速度及第二预设速度时，需要根据实际情况设置。而当第一预设速度与第二预设速度相同时，由于排气过程中活塞120的运动速度与持续输出加压液体时的活塞120速度相同，故控制器250控制驱动电机221在排气及持续输出加压 液体时的指令相同。
而当第一预设速度与第二预设速度不同时，由于排气过程中活塞120的运动速度与持续输出加压液体时的活塞120速度不同，故控制器250则需要两组指令分别对应控制驱动电机221进行排气及持续输出加压液体。
并且当活塞120在泵头100的内腔111中运动时，活塞120沿同一方向的运动为匀速运动。
需要说明的，由上述的压力泵200可知，该压力泵200的活塞120在运动的过程中是通过驱动电机221带动滑块222运动，随后通过滑块222带动活塞杆130的运动，进而通过活塞杆130的运动带动活塞120在内腔111中的相对运动，即在此过程中，为对活塞120的运动进行控制，可以通过对驱动电机221的工作状态进行控制实现，由此，可以通过控制驱动电机221的工作状态，从而使得活塞120在泵头100中沿同一方向的运动为匀速运动。此外，由于活塞120在泵头100中的往复运动包括第一行程及第二行程，且活塞120在同一行程中的运动方向不变，故活塞120在第一行程中运动为匀速运动，且活塞120在第二行程中运动为匀速运动。
进一步地，活塞120在沿第一行程运动时，第一腔室112减少的体积与第二腔室113增加的体积相同；活塞120在沿第二行程运动时，第一腔室112增加的体积与第二腔室113减少的体积相同。当活塞120运动至第一行程的终点时，第一腔室112的容积为第一容积；当活塞120运动至第二行程的终点时，第二腔室113的容积为第二容积；第一容积与第二容积相同。
由此，当活塞120位于其行程的中间位置时，第一腔室112及第二腔室113相对于活塞120对称，并且在活塞120在内腔111中运动的过程中，第一腔室112的容积的变化率及第二腔室113的变化率相同。由此能够使得该压力泵200在进液及出液的过程中，其进液量与出液量相同，从而能够提高该压力泵200的工作稳定性。
进一步地，当控制驱动电机221带动活塞120以第一预设速度在泵头100中往复运动，以对压力泵200进行排气，直至第一稳压管140输出的液体中不含有气泡时，其包括以下步骤：
控制驱动电机221带动活塞120沿预设方向以第一预设速度运动，带动定位块271在检测区域273中同步运动；
当检测区域273中的一个位置传感器272检测到定位块271运动至检测区域273的一端后，控制驱动电机221带动活塞120及定位块271沿与预设方向相反的方向运动；
当检测区域273中的另一个位置传感器272检测到定位块271运动至检测区域273的另一端后，控制驱动电机221带动活塞120及定位块271沿预设方向运动；
直至第一稳压管140输出的液体中不含有气泡。
而当控制驱动电机221带动活塞120沿预设方向以第二预设速度在泵头100中往复运动，以使得第一稳压管140持续输出加压液体时，其包括以下步骤：
控制驱动电机221带动活塞120沿预设方向运动以第二预设速度运动，带动定位块271在检测区域273中同步运动；
当检测区域273中的一个位置传感器272检测到定位块271运动至检测区域273的一端后，控制驱动电机221带动活塞120及定位块271沿与预设方向相反的方向运动；
当检测区域273中的另一个位置传感器272检测到定位块271运动至检测区域273的另一端后，控制驱动电机221带动活塞120及定位块271沿预设方向运动。
进一步地，该压力泵200在工作的工作中，通过控制器250还可以对滑块222施加至活塞杆130上的推拉力进行检测。以在驱动电机221带动活塞120相对于泵头100运动的过程中，当推拉力传感器240检测到施加至活塞杆130上的推拉力超出预设推拉力范围时，通过控制器250控制驱动电机221停止工作。以避免施加的压力过大或者在阻塞破除后产生突然间的压力释放，造成出液的压力过大，进而对病人造成伤害，故一旦出现实时推拉力超出预设推拉力范围的情况时，控制器250便会控制该压力泵200停止工作，即驱动电机221停止工作，第一稳压管140停止出液。
另外，该压力泵200在工作时，通过控制器250还可以对电路中的电流进行检测。以在电流传感器260检测到驱动电机221中的电流超出预设电流范围时，通过控制驱动电机221停止工作，以避免出现设备损坏的情况。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种泵头，其特征在于：
    所述泵头包括泵体、活塞、活塞杆及可膨胀的第一稳压管；
    所述泵体具备内腔，所述活塞及所述活塞杆均位于所述内腔内，且所述活塞与所述活塞杆连接，所述活塞与所述内腔的壁贴合，所述活塞杆配置成带动所述活塞相对于所述内腔沿预设方向往复运动；
    所述活塞将所述内腔分隔为第一腔室及第二腔室；所述泵体上设置有与所述第一腔室对应导通的第一排液口，以及与所述第二腔室对应导通的第二排液口；
    所述第一排液口及所述第二排液口均与所述第一稳压管的一端连通，所述第一稳压管的另一端配置成与手术器械连通；所述第一稳压管配置成在膨胀状态和收缩状态间转换，以补偿所述第一稳压管内的压力，并降低所述第一稳压管向所述手术器械连续输送液体时的流量变化。
  2. 根据权利要求1所述的泵头，其特征在于：
    所述泵头还包括第二稳压管；所述泵体上还设置有与所述第一腔室对应导通的第一进液口，以及与所述第二腔室对应导通第二进液口；
    所述第一进液口及所述第二进液口均与所述第二稳压管的一端连通，所述第二稳压管的另一端与液体箱连通，所述第二稳压管配置成在膨胀状态和收缩状态间转换，以补偿所述第二稳压管内的液体压力，并降低所述第二稳压管向所述第一进液口及所述第二进液口连续输送液体时的流量变化。
  3. 根据权利要求2所述的泵头，其特征在于：
    所述第一稳压管及所述第二稳压管均可采用弹性塑料软管、编织软管或弹性网管中的任意一种制成。
  4. 根据权利要求2所述的泵头，其特征在于：
    所述泵体还包括第一流道及第二流道；
    所述第一流道同时与所述第一排液口及所述第二排液口连通，所述第一流道的出口与所述第一稳压管连通；
    所述第二流道同时与所述第一进液口及所述第二进液口连通，所述第二流道的入口与所述第二稳压管连通。
  5. 根据权利要求4所述的泵头，其特征在于：
    所述第一流道的出口处及所述第二流道的入口处均设置有管接头；
    所述第一流道的出口处的所述管接头配置成与所述第一稳压管可拆卸地连接；
    所述第二流道的入口处的所述管接头配置成与所述第二稳压管可拆卸地连接。
  6. 一种压力泵，其特征在于：
    所述压力泵包括底座、驱动机构以及如权利要求1-5中任意一项所述的泵头；
    所述泵头及所述驱动机构均与所述底座连接，所述驱动机构包括驱动电机以及与所述驱动电机的输出轴传动连接的滑块，所述滑块与所述活塞杆传动连接，以使得所述驱动电机可带动所述活塞沿所述预设方向往复运动。
  7. 根据权利要求6所述的压力泵，其特征在于：
    所述压力泵还包括卡紧结构；
    所述卡紧结构包括与所述滑块连接的卡接块，以及与所述活塞杆连接的卡紧部；
    所述卡紧部配置成与所述卡接块卡接，以限制所述活塞杆沿预设方向与所述滑块脱离。
  8. 根据权利要求7所述的压力泵，其特征在于：
    所述卡接块上设置有与所述卡紧部卡接的卡槽，所述卡槽的槽体延伸方向与所述预设方向垂直。
  9. 根据权利要求7所述的压力泵，其特征在于：
    所述压力泵还包括推拉力传感器及控制器，所述推拉力传感器设置在所述卡接块与所述滑块的连接处，以配置成检测所述滑块施加至所述活塞杆上的推拉力；
    所述推拉力传感器及所述驱动电机均与所述控制器电连接，所述控制器配置成接收推拉力信号，以在推拉力超出预设推拉力范围后控制所述压力泵停止运行。
  10. 根据权利要求6所述的压力泵，其特征在于：
    所述压力泵还包括控制器及设置所述压力泵的电路上的电流传感器，所述电流传感器配置成检测所述压力泵的电路上的电流；
    所述电流传感器及所述驱动电机均与所述控制器电连接，所述控制器配置成接收电流信号，以在电流超出预设电流范围后控制所述压力泵停止运行。
  11. 根据权利要求6所述的压力泵，其特征在于：
    所述压力泵还包括限位结构及控制器，所述限位结构包括定位块以及两个位置传感器；
    两个所述位置传感器均与所述底座连接，且两个所述位置传感器沿所述预设方向间隔布置，以形成检测区域；所述定位块与所述滑块连接，并位于所述检测区域内；
    所述驱动电机及两个所述位置传感器均与所述控制器电连接，所述控制器配置成接收位置信号，以在所述定位块运动至所述检测区域的一端后，控制所述驱动电机反转并带动所述定位块向所述检测区域的另一端运动。
  12. 一种压力泵控制方法，配置成对如权利要求6-11中任意一项所述的压力泵进行控制，其特征在于，所述压力泵控制方法包括以下步骤：
    控制驱动电机带动活塞以第一预设速度在泵头中往复运动，以对压力泵进行排气，直至所述第一稳压管输出的液体中不含有气泡；
    控制所述驱动电机带动所述活塞沿所述预设方向以第二预设速度在泵头中往复运动，以使得所述第一稳压管持续输出加压液体。
  13. 根据权利要求12中所述的压力泵控制方法，其特征在于：
    所述活塞在所述泵头中沿同一方向的运动为匀速运动。
  14. 根据权利要求12或13中所述的压力泵控制方法，其特征在于：
    所述活塞在所述泵头中的往复运动包括第一行程及第二行程；
    所述活塞在沿所述第一行程运动时，所述第一腔室减少的体积与所述第二腔室增加的体积相同；所述活塞在沿所述第二行程运动时，所述第一腔室增加的体积与所述第二腔室减少的体积相同；
    当所述活塞运动至所述第一行程的终点时，所述第一腔室的容积为第一容积；当所述活塞运动至所述第二行程的终点时，所述第二腔室的容积为第二容积；所述第一容积与所述第二容积相同。
  15. 根据权利要求12中所述的压力泵控制方法，其特征在于：
    所述控制驱动电机带动活塞以第一预设速度在泵头中往复运动，以对压力泵进行排气，直至所述第一稳压管输出的液体中不含有气泡包括：
    控制所述驱动电机带动所述活塞沿所述预设方向以所述第一预设速度运动，带动定位 块在检测区域中同步运动；
    当所述检测区域中的一个位置传感器检测到所述定位块运动至所述检测区域的一端后，控制所述驱动电机带动所述活塞及所述定位块沿与所述预设方向相反的方向运动；
    当所述检测区域中的另一个位置传感器检测到所述定位块运动至所述检测区域的另一端后，控制所述驱动电机带动所述活塞及所述定位块沿所述预设方向运动；
    直至所述第一稳压管输出的液体中不含有气泡。
  16. 根据权利要求12中所述的压力泵控制方法，其特征在于：
    所述控制所述驱动电机带动所述活塞沿所述预设方向以第二预设速度在泵头中往复运动，以使得所述第一稳压管持续输出加压液体包括：
    控制所述驱动电机带动所述活塞沿所述预设方向运动以所述第二预设速度运动，带动定位块在检测区域中同步运动；
    当所述检测区域中的一个位置传感器检测到所述定位块运动至所述检测区域的一端后，控制所述驱动电机带动所述活塞及所述定位块沿与所述预设方向相反的方向运动；
    当所述检测区域中的另一个位置传感器检测到所述定位块运动至所述检测区域的另一端后，控制所述驱动电机带动所述活塞及所述定位块沿所述预设方向运动。
  17. 根据权利要求12中所述的压力泵控制方法，其特征在于：
    当所述驱动电机带动所述活塞相对于所述泵头运动时，当推拉力传感器检测到施加至所述活塞杆上的推拉力超出预设推拉力范围后，控制所述压力泵停止工作。
  18. 根据权利要求12中所述的压力泵控制方法，其特征在于：
    当电流传感器检测到所述驱动电机中的电流超出预设电流范围后，控制所述压力泵停止工作。
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