WO2022120553A1 - High-voltage constant-current pump for liquid chromatograph - Google Patents

High-voltage constant-current pump for liquid chromatograph Download PDF

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Publication number
WO2022120553A1
WO2022120553A1 PCT/CN2020/134427 CN2020134427W WO2022120553A1 WO 2022120553 A1 WO2022120553 A1 WO 2022120553A1 CN 2020134427 W CN2020134427 W CN 2020134427W WO 2022120553 A1 WO2022120553 A1 WO 2022120553A1
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Prior art keywords
pump
liquid
controller
liquid outlet
slider
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PCT/CN2020/134427
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French (fr)
Chinese (zh)
Inventor
章志尧
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江苏同济分析仪器有限公司
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Priority to PCT/CN2020/134427 priority Critical patent/WO2022120553A1/en
Publication of WO2022120553A1 publication Critical patent/WO2022120553A1/en

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    • 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
    • F04B49/06—Control using electricity
    • 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
    • F04B51/00—Testing machines, pumps, or pumping installations
    • 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
    • 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

Definitions

  • the invention relates to a high-pressure constant-flow pump for a liquid chromatograph.
  • Liquid chromatograph is an instrument for separation and analysis of solution samples, which can be used for macro or micro analysis and detection of liquid or solid samples dissolved in liquid.
  • the liquid chromatograph is mainly composed of a sample injection system, an infusion system, a separation system, a detection system and a data processing system.
  • the main equipment in the infusion system is a high-pressure constant-flow pump.
  • the liquid chromatograph outputs the mobile phase by the high-pressure constant-flow pump, which is an extremely important and relatively independent component in the liquid chromatograph.
  • the high-pressure constant-flow pump of the existing liquid chromatograph is used, sometimes it is necessary to enter and exit the liquid according to the set amount multiple times for repeated detection, and the requirements for the separate storage of each effluent are required.
  • the high-pressure constant-flow pump of the phase chromatograph is usually provided with a manual button on the front panel of the pump cover to select the working mode of the liquid dispensing.
  • you need to hold the liquid outlet hose in one hand to align the dispensing container, and in different Moving above the sub-packaging container and repeatedly pressing the manual button of the sub-packaging with the other hand is inconvenient to operate, time-consuming and labor-intensive. Moving the liquid outlet hose by hand for a long time has poor movement stability and is prone to liquid spillage.
  • the purpose of the present invention is to provide a high-pressure constant-flow pump for a liquid chromatograph, which reduces manual operation steps and can stably, easily and accurately dispense fluids.
  • a high-pressure constant-flow pump for a liquid chromatograph comprising a pump body and a pump cover, the front side wall of the pump cover is provided with a front panel, the pump body is mounted on the front panel, and the pump body is provided with a servo motor, a cam, and a liquid inlet And the liquid outlet, the output shaft of the servo motor is connected to the cam, and then drives the cam to rotate, the liquid inlet is connected with a liquid inlet hose, the liquid outlet is connected with a flowmeter, and the other port of the flowmeter is connected with a liquid outlet hose; front There is a touch screen on the panel, and the touch screen is equipped with a power switch button, a subassembly button and a data display screen; a controller is arranged in the pump cover, and a foot switch is arranged outside the pump cover.
  • the foot switch is an electrical contact switch, and the power switch button , Distributed button, foot switch and flowmeter are respectively connected to the controller, and the controller is respectively connected to
  • a horizontal chute is also provided on the front panel, and a slider matching the chute is arranged in the chute, and the slider can move in the chute; the front side of the slider is connected with a clamping ring, and the liquid outlet hose fixed in the clamp ring.
  • the liquid outlet hose can be aligned with the mouth of each sub-packaging container in turn, and then the liquid outlet hose can be aligned with the mouth of each sub-packaging container. It does not need to manually hold the liquid outlet hose all the time, so the operation is easier and labor-saving.
  • the clamping ring is made of elastic silicone material, so that the liquid outlet hose can be clamped and can be applied to liquid outlet hoses of different pipe diameters.
  • the pump cover is also provided with a slider drive motor
  • the controller is connected to the slider drive motor
  • the output shaft of the slider drive motor is connected to a gear
  • a rack is meshed above the gear
  • the rack is fixedly connected to the rear side of the slider ;
  • the controller can control the slider drive motor to rotate the gear intermittently according to the input signal of the foot switch, and the gear drives the gear rack meshed with it to move linearly, so that the rack drive slider moves in the chute.
  • the controller When the operator steps on the foot switch, the controller receives the input signal of the foot switch, and then controls the sliding drive motor to drive the gear to rotate a set angle, and the gear drive rack moves linearly along the chute, so the slider drives The clamping ring moves to the top of another dispensing container for the next dispensing action cycle.
  • the slider drive motor is a stepping motor.
  • the output stroke of each stepper motor is equal, which is convenient to accurately and stably control the moving distance of the clamping ring.
  • the clamping ring is fixed at a position close to the outlet of the liquid outlet hose, so as to increase the accuracy of the liquid flowing into the sub-packaging container, and avoid the flexible liquid outlet hose shaking and causing the liquid to spill out of the sub-packaging container.
  • the present invention further includes a workbench, the pump cover is placed on the workbench, and the foot switch is located under the workbench, so that the operator can step on the foot switch with their feet.
  • the side wall of the pump cover is provided with a data line interface connected with the controller, and the foot switch is installed on the data line interface through the data line.
  • the foot switch is installed on the controller interface through the data cable, so that when there is no need to dispense liquid or move the liquid chromatograph, the foot switch can be easily removed from the constant current pump.
  • the sub-packaging button, foot switch, flow meter and controller of the present invention work together to realize stable sub-packaging of the liquid output of the constant-flow pump, reduce the workload of manual hands, easy to operate, and work well. Good stability.
  • the slider, the clamping ring and the slider drive motor of the present invention can automatically clamp the liquid outlet hose and intermittently divide the liquid into the container according to the set distance, and do not need to manually operate the liquid outlet hose.
  • the results are stable and reliable, and the operation is convenient and labor-saving.
  • Fig. 1 is the structural representation of the present invention
  • FIG. 2 is a schematic side view of the structure of the connection between the slider of the present invention and the slider drive motor;
  • FIG. 3 is a schematic diagram of the control principle of the present invention.
  • a high-pressure constant-flow pump for a liquid chromatograph includes a pump body 1 and a pump cover 2.
  • the front side wall of the pump cover 2 is provided with a front panel 21, and the pump body 1 is installed on the front panel 21.
  • the pump body 1 is provided with a servo motor 11, a cam (not shown in the figure), a liquid inlet 12 and a liquid outlet 13, the output shaft of the servo motor 11 is connected to the cam, and then drives the cam to rotate, and the liquid inlet 12
  • a liquid inlet hose 14 is connected to the top
  • a flow meter 16 is connected to the liquid outlet 13
  • another port of the flow meter 16 is connected to a liquid outlet hose 15;
  • the front panel 21 is provided with a touch screen, and the touch screen is provided with a power switch button 22.
  • the foot switch 4 and the flow meter 16 are respectively connected to the controller 3, and the controller 3 is respectively connected to the servo motor 11 and the data display screen 24.
  • the front panel 21 is also provided with a sliding groove 25 horizontally, and the sliding groove 25 is provided with a sliding block 26 matching the sliding groove 25, and the sliding block 26 can move in the sliding groove 25;
  • a clamp ring 27 is connected to the front side of the block 26 , and the liquid outlet hose 15 is fixed in the clamp ring 27 .
  • the clamping ring 27 is made of elastic silicone material, so that the liquid outlet hose 15 can be clamped and can be applied to liquid outlet hoses of different diameters.
  • the pump cover 2 is also provided with a slider drive motor 5, the controller 3 is connected to the slider drive motor 5, the output shaft of the slider drive motor 5 is connected to the gear 6, and the upper part of the gear 6 is meshed with a
  • the rack 28, the rack 28 is fixedly connected to the rear side of the slider 26; the controller 3 can control the slider drive motor 5 to rotate the gear 6 intermittently according to the input signal of the foot switch 4, and the gear 6 drives the teeth meshing with it.
  • the bar 28 moves linearly, so that the rack 28 drives the slider 26 to move in the chute 25 .
  • the slider drive motor 5 is a stepping motor.
  • the clamp ring 27 is fixed on the liquid outlet hose 15 at a position close to the outlet of the liquid outlet hose.
  • the present invention also includes a workbench 7 , the pump cover 2 , the liquid container 8 and the sub-packaging container 9 are respectively placed on the workbench 7 , and the foot switch 4 is located below the workbench 7 .
  • the side wall of the pump cover 2 is provided with a data line interface 29 connected to the controller 3 , and the foot switch 4 is installed on the data line interface 29 through the data line.
  • the controller controls the servo motor to stop working, and controls the slider drive motor to start working and drives the clamping ring. Drive the end of the liquid outlet hose to move to the top of the second sub-packaging container. At this time, the slider drive motor suspends the action, and the operator steps on the foot switch. After the controller receives the signal from the foot switch, it automatically controls The servo motor starts to work, and the next dispensing cycle is repeated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A high-voltage constant-current pump for a liquid chromatograph, comprising a pump body (1) and a pump cover (2). A front side wall of the pump cover (2) is provided with a front panel (21), and the pump body (1) is mounted on the front panel (21). A servo motor (11), a cam, a liquid inlet (12), and a liquid outlet (13) are disposed in the pump body (1). An output shaft of the servo motor (11) is connected to the cam to then drive the cam to rotate. A liquid inlet hose (14) is connected to the liquid inlet (12), a flowmeter (16) is connected to the liquid outlet (13), and another port of the flowmeter (16) is connected to a liquid outlet hose (15). A touch screen is disposed on the front panel (21), a power switch button (22), a dispensing button (23), and a data display screen (24) are disposed in the touch screen. A controller (3) is disposed in the pump cover (2), a pedal switch (4) is disposed outside the pump cover (2), and the pedal switch (4) is an electric contact switch. The power switch button (22), the dispensing button (23), the pedal switch (4), and the flowmeter (16) are each connected to the controller (3), and the controller (3) is separately connected to the servo motor (11) and the data display screen (24). The high-voltage constant-current pump can stably dispense liquid discharged by the constant-current pump, reduces the manual workload, is easy to operate, and has good working stability.

Description

一种液相色谱仪高压恒流泵A high pressure constant flow pump for liquid chromatograph 技术领域technical field
本发明涉及一种液相色谱仪高压恒流泵。The invention relates to a high-pressure constant-flow pump for a liquid chromatograph.
背景技术Background technique
液相色谱仪是对溶液样品进行分离分析的仪器，可用于对液体或溶于液体的固体样品进行常量或微量分析检测。液相色谱仪主要由进样***、输液***、分离***、检测***和数据处理***等部分组成，其中输液***中的主要设备是高压恒流泵。液相色谱仪由高压恒流泵输出流动相，高压恒流泵是液相色谱仪中一个极其重要，又相对独立的组成部分。现有的液相色谱仪高压恒流泵使用时，有时出现需多次按设定的量进液和出液，以进行重复检测，并且对各次出液分开保存的要求，现有的液相色谱仪高压恒流泵通常在泵盖的前面板上设置手动按钮，用于选择出液分装的工作模式，使用时需要一手拿着出液软管对准分装容器，并且在不同的分装容器上方移动，另一只手重复性地按分装的手动按钮，操作不方便，费时费力，长期用手移动出液软管，动作稳定性差，易出现液体洒溅现象。Liquid chromatograph is an instrument for separation and analysis of solution samples, which can be used for macro or micro analysis and detection of liquid or solid samples dissolved in liquid. The liquid chromatograph is mainly composed of a sample injection system, an infusion system, a separation system, a detection system and a data processing system. The main equipment in the infusion system is a high-pressure constant-flow pump. The liquid chromatograph outputs the mobile phase by the high-pressure constant-flow pump, which is an extremely important and relatively independent component in the liquid chromatograph. When the high-pressure constant-flow pump of the existing liquid chromatograph is used, sometimes it is necessary to enter and exit the liquid according to the set amount multiple times for repeated detection, and the requirements for the separate storage of each effluent are required. The high-pressure constant-flow pump of the phase chromatograph is usually provided with a manual button on the front panel of the pump cover to select the working mode of the liquid dispensing. When using it, you need to hold the liquid outlet hose in one hand to align the dispensing container, and in different Moving above the sub-packaging container and repeatedly pressing the manual button of the sub-packaging with the other hand is inconvenient to operate, time-consuming and labor-intensive. Moving the liquid outlet hose by hand for a long time has poor movement stability and is prone to liquid spillage.
发明内容SUMMARY OF THE INVENTION
本发明的目的是提供一种液相色谱仪高压恒流泵，减少人工操作步骤，可稳定、轻松、准确地对流体分装。The purpose of the present invention is to provide a high-pressure constant-flow pump for a liquid chromatograph, which reduces manual operation steps and can stably, easily and accurately dispense fluids.
本发明提供了如下的技术方案：The invention provides the following technical solutions:
一种液相色谱仪高压恒流泵，包括泵体和泵盖，泵盖的前侧壁设有前面板，泵体安装于前面板上，泵体内设有伺服电机、凸轮、以及进液口和出液口，伺服电机的输出轴连接凸轮，进而驱动凸轮转动，进液口上连接有进液软管，出液口上连接有流量计，流量计的另一端口连接有出液软管；前面板上设有触摸屏，触摸屏内设有电源开关按键、分装按键和数据显示屏；泵盖内设有控制器，泵盖外设有脚踏开关，脚踏开关为电接触开关，电源开关按键、分装按键、脚踏开关和流量计分别连接控制器，控制器分别连接伺服电机和数据显示屏。A high-pressure constant-flow pump for a liquid chromatograph, comprising a pump body and a pump cover, the front side wall of the pump cover is provided with a front panel, the pump body is mounted on the front panel, and the pump body is provided with a servo motor, a cam, and a liquid inlet And the liquid outlet, the output shaft of the servo motor is connected to the cam, and then drives the cam to rotate, the liquid inlet is connected with a liquid inlet hose, the liquid outlet is connected with a flowmeter, and the other port of the flowmeter is connected with a liquid outlet hose; front There is a touch screen on the panel, and the touch screen is equipped with a power switch button, a subassembly button and a data display screen; a controller is arranged in the pump cover, and a foot switch is arranged outside the pump cover. The foot switch is an electrical contact switch, and the power switch button , Distributed button, foot switch and flowmeter are respectively connected to the controller, and the controller is respectively connected to the servo motor and the data display screen.
优选的，前面板上还设有水平的滑槽，滑槽内设有与滑槽匹配的滑块，滑块可在滑槽内移动；滑块的前侧连接有夹环，出液软管固定于夹环内。将出液软管固定于夹环内后，仅需推动滑块，带动夹环和出液软管沿着滑槽移动，即可依次将出液软管对准各个分装容器口，进行分装，不需要人工一直手持出液软管，因此操作更加轻松省力。Preferably, a horizontal chute is also provided on the front panel, and a slider matching the chute is arranged in the chute, and the slider can move in the chute; the front side of the slider is connected with a clamping ring, and the liquid outlet hose fixed in the clamp ring. After the liquid outlet hose is fixed in the clamping ring, just push the slider to drive the clamping ring and the liquid outlet hose to move along the chute, then the liquid outlet hose can be aligned with the mouth of each sub-packaging container in turn, and then the liquid outlet hose can be aligned with the mouth of each sub-packaging container. It does not need to manually hold the liquid outlet hose all the time, so the operation is easier and labor-saving.
优选的，夹环为弹性硅胶材质，从而可夹紧出液软管，并且能适用于不同管径的出液软管。Preferably, the clamping ring is made of elastic silicone material, so that the liquid outlet hose can be clamped and can be applied to liquid outlet hoses of different pipe diameters.
优选的，泵盖内还设有滑块驱动电机，控制器连接滑块驱动电机，滑块驱动电机的输出轴连接齿轮，齿轮的上方啮合有齿条，齿条固定连接于滑块的后侧；控制器可根据脚踏开关的输入信号，控制滑块驱动电机间歇性地转动齿轮，齿轮驱动与其啮合的齿条作直线移动，从而使齿条传动滑块在滑槽内移动。当操作人员踩踏脚踏开关后，控制器接收到脚踏开关的输入信号，进而控制滑动驱动电机驱动齿轮转动一个设定的角度，齿轮传动齿条沿着滑槽作直线移动，于是滑块带动夹环移动至另一个分装容器的上方，进行下一个分装动作循环。Preferably, the pump cover is also provided with a slider drive motor, the controller is connected to the slider drive motor, the output shaft of the slider drive motor is connected to a gear, a rack is meshed above the gear, and the rack is fixedly connected to the rear side of the slider ; The controller can control the slider drive motor to rotate the gear intermittently according to the input signal of the foot switch, and the gear drives the gear rack meshed with it to move linearly, so that the rack drive slider moves in the chute. When the operator steps on the foot switch, the controller receives the input signal of the foot switch, and then controls the sliding drive motor to drive the gear to rotate a set angle, and the gear drive rack moves linearly along the chute, so the slider drives The clamping ring moves to the top of another dispensing container for the next dispensing action cycle.
优选的，滑块驱动电机为步进电机。当分装容器等间距地放置于试管架等支架上时，步进电机每动作一次的输出行程相等，便于准确稳定地控制夹环的移动距离。Preferably, the slider drive motor is a stepping motor. When the sub-packaging containers are placed on the test tube racks and other supports at equal intervals, the output stroke of each stepper motor is equal, which is convenient to accurately and stably control the moving distance of the clamping ring.
优选的，夹环固定于接近出液软管的出口位置处，用以增加液体流入分装容器的准确性，避免柔性的出液软管产生晃动而造成液体洒出分装容器。Preferably, the clamping ring is fixed at a position close to the outlet of the liquid outlet hose, so as to increase the accuracy of the liquid flowing into the sub-packaging container, and avoid the flexible liquid outlet hose shaking and causing the liquid to spill out of the sub-packaging container.
优选的，本发明还包括工作台，泵盖放置于工作台上，脚踏开关位于工作台下方，方便操作人员用脚踩踏脚踏开关。Preferably, the present invention further includes a workbench, the pump cover is placed on the workbench, and the foot switch is located under the workbench, so that the operator can step on the foot switch with their feet.
优选的，泵盖的侧壁上设有与控制器连接的数据线接口，脚踏开关通过数据线安装于数据线接口上。脚踏开关通过数据线安装于控制器接口上，从而当不需要分装液体、或者移动液相色谱仪时，方便将脚踏开关由恒流泵上拆卸下来。Preferably, the side wall of the pump cover is provided with a data line interface connected with the controller, and the foot switch is installed on the data line interface through the data line. The foot switch is installed on the controller interface through the data cable, so that when there is no need to dispense liquid or move the liquid chromatograph, the foot switch can be easily removed from the constant current pump.
本发明的有益效果是：The beneficial effects of the present invention are:
1、本发明的分装按键、脚踏开关、流量计和控制器共同作用，可实现对恒流泵的出液进行稳定地分装，减少了人工手部的工作量，操作轻松，并且工作稳定性好。1. The sub-packaging button, foot switch, flow meter and controller of the present invention work together to realize stable sub-packaging of the liquid output of the constant-flow pump, reduce the workload of manual hands, easy to operate, and work well. Good stability.
2、本发明的滑块、夹环和滑块驱动电机可自动夹持出液软管按设定的距离间歇性地将液体分装入容器中，不需要人工操作出液软管，分装结果稳定可靠，操作方便省力。2. The slider, the clamping ring and the slider drive motor of the present invention can automatically clamp the liquid outlet hose and intermittently divide the liquid into the container according to the set distance, and do not need to manually operate the liquid outlet hose. The results are stable and reliable, and the operation is convenient and labor-saving.
附图说明Description of drawings
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例一起用于解释本发明，并不构成对本发明的限制。在附图中：The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:
图1是本发明的结构示意图；Fig. 1 is the structural representation of the present invention;
图2是本发明的滑块与滑块驱动电机连接处的侧视结构示意图；FIG. 2 is a schematic side view of the structure of the connection between the slider of the present invention and the slider drive motor;
图3是本发明的控制原理示意图。FIG. 3 is a schematic diagram of the control principle of the present invention.
图中标记为：1.泵体；11.伺服电机；12.进液口；13.出液口；14.进液软管；15.出液软管；16.流量计；2.泵盖；21.前面板；22.电源开关按键；23.分装按键；24.数据显示屏；25.滑槽；26.滑块；27.夹环；28.齿条；29.数据线接口；3.控制器；4.脚踏开关；5.滑块驱动电机；6.齿轮；7.工作台；8.盛液容器；9.分装容器。Marked as: 1. Pump body; 11. Servo motor; 12. Liquid inlet; 13. Liquid outlet; 14. Liquid inlet hose; 15. Liquid outlet hose; 16. Flow meter; 2. Pump cover ; 21. Front panel; 22. Power switch button; 23. Subassembly button; 24. Data display screen; 25. Chute; 26. Slider; 27. Clamp ring; 28. Rack; 3. Controller; 4. Foot switch; 5. Slider drive motor; 6. Gear; 7. Workbench; 8. Liquid container; 9. Sub-packaging container.
具体实施方式Detailed ways
如图1和图3所示，一种液相色谱仪高压恒流泵，包括泵体1和泵盖2，泵盖2的前侧壁设有前面板21，泵体1安装于前面板21上，泵体1内设有伺服电机11、凸轮(图中未示出)、以及进液口12和出液口13，伺服电机11的输出轴连接凸轮，进而驱动凸轮转动，进液口12上连接有进液软管14，出液口13上连接有流量计16，流量计16的另一端口连接有出液软管15；前面板21上设有触摸屏，触摸屏内设有电源开关按键22、分装按键23和数据显示屏24；泵盖2内设有控制器3，泵盖2外设有脚踏开关4，脚踏开关4为电接触开关，电源开关按键22、分装按键23、脚踏开关4和流量计16分别连接控制器3，控制器3分别连接伺服电机11和数据显示屏24。As shown in Figures 1 and 3, a high-pressure constant-flow pump for a liquid chromatograph includes a pump body 1 and a pump cover 2. The front side wall of the pump cover 2 is provided with a front panel 21, and the pump body 1 is installed on the front panel 21. Above, the pump body 1 is provided with a servo motor 11, a cam (not shown in the figure), a liquid inlet 12 and a liquid outlet 13, the output shaft of the servo motor 11 is connected to the cam, and then drives the cam to rotate, and the liquid inlet 12 A liquid inlet hose 14 is connected to the top, a flow meter 16 is connected to the liquid outlet 13, and another port of the flow meter 16 is connected to a liquid outlet hose 15; the front panel 21 is provided with a touch screen, and the touch screen is provided with a power switch button 22. The subassembly button 23 and the data display screen 24; the pump cover 2 is provided with a controller 3, the pump cover 2 is provided with a foot switch 4 outside, the foot switch 4 is an electrical contact switch, the power switch button 22, the subassembly button 23. The foot switch 4 and the flow meter 16 are respectively connected to the controller 3, and the controller 3 is respectively connected to the servo motor 11 and the data display screen 24.
如图1和图2所示，前面板21上还水平地设有滑槽25，滑槽25内设有与滑槽25匹配的滑块26，滑块26可在滑槽25内移动；滑块26的前侧连接有夹环27，出液软管15固定于夹环27内。As shown in FIG. 1 and FIG. 2 , the front panel 21 is also provided with a sliding groove 25 horizontally, and the sliding groove 25 is provided with a sliding block 26 matching the sliding groove 25, and the sliding block 26 can move in the sliding groove 25; A clamp ring 27 is connected to the front side of the block 26 , and the liquid outlet hose 15 is fixed in the clamp ring 27 .
夹环27为弹性硅胶材质，从而可夹紧出液软管15，并且能适用于不同管径的出液软管。The clamping ring 27 is made of elastic silicone material, so that the liquid outlet hose 15 can be clamped and can be applied to liquid outlet hoses of different diameters.
如图2和图3所示，泵盖2内还设有滑块驱动电机5，控制器3连接滑块驱动电机5，滑块驱动电机5的输出轴连接齿轮6，齿轮6的上方啮合有齿条28，齿条28固定连接于滑块26的后侧；控制器3可根据脚踏开关4的输入信号，控制滑块驱动电机5间歇性地转动齿轮6，齿轮6驱动与其啮合的齿条28作直线移动，从而使齿条28传动滑块26在滑槽25内移动。As shown in Figures 2 and 3, the pump cover 2 is also provided with a slider drive motor 5, the controller 3 is connected to the slider drive motor 5, the output shaft of the slider drive motor 5 is connected to the gear 6, and the upper part of the gear 6 is meshed with a The rack 28, the rack 28 is fixedly connected to the rear side of the slider 26; the controller 3 can control the slider drive motor 5 to rotate the gear 6 intermittently according to the input signal of the foot switch 4, and the gear 6 drives the teeth meshing with it. The bar 28 moves linearly, so that the rack 28 drives the slider 26 to move in the chute 25 .
滑块驱动电机5为步进电机。The slider drive motor 5 is a stepping motor.
如图1所示，夹环27固定于出液软管15上的接近出液软管的出口位置处。As shown in FIG. 1 , the clamp ring 27 is fixed on the liquid outlet hose 15 at a position close to the outlet of the liquid outlet hose.
本发明还包括工作台7，泵盖2、盛液容器8和分装容器9分别放置于工作台7上，脚踏开关4位于工作台7的下方。The present invention also includes a workbench 7 , the pump cover 2 , the liquid container 8 and the sub-packaging container 9 are respectively placed on the workbench 7 , and the foot switch 4 is located below the workbench 7 .
泵盖2的侧壁上设有与控制器3连接的数据线接口29，脚踏开关4通过数据线安装于数据线接口29上。The side wall of the pump cover 2 is provided with a data line interface 29 connected to the controller 3 , and the foot switch 4 is installed on the data line interface 29 through the data line.
当需要分装试验液时，在工作台的进液软管下方放置盛液容器，在出液软管的下方等间距地并列放置多个分装容器，在触摸屏上设定每次的分装量，即每分装一次的出液流量，再设定滑块驱动电机每次的输出行程，即夹环每移动一次的距离，该距离对应相邻两个分装容器之间的距离；然后，按下电源开关按键和分装按键，伺服电机 和凸轮开始工作，将液体由盛液容器以恒流方式输送至第一个分装容器内，出液口处的流量计实时记录出液流量值并且向控制器输出该出液流量值，当检测到的出液流量值达到分装量的设定值时，控制器控制伺服电机停止工作，同时控制滑块驱动电机开始工作，驱动夹环带动出液软管的端部移动至第二个分装容器的上方，此时，滑块驱动电机暂停动作，操作人员踩下脚踏开关，控制器接收到脚踏开关的信号后，自动控制伺服电机开始工作，重复进入下一个分装循环。When it is necessary to sub-pack the test liquid, place a liquid container under the liquid inlet hose of the workbench, place multiple sub-packaging containers equidistantly and side by side under the liquid outlet hose, and set each sub-packaging on the touch screen Then, set the output stroke of the slider drive motor each time, that is, the distance that the clamping ring moves once, which corresponds to the distance between two adjacent sub-packaging containers; then , press the power switch button and the sub-packaging button, the servo motor and the cam start to work, and the liquid is transported from the liquid container to the first sub-packaging container in a constant flow mode, and the flow meter at the liquid outlet records the liquid flow in real time. and output the liquid flow value to the controller. When the detected liquid flow value reaches the set value of the dispensing volume, the controller controls the servo motor to stop working, and controls the slider drive motor to start working and drives the clamping ring. Drive the end of the liquid outlet hose to move to the top of the second sub-packaging container. At this time, the slider drive motor suspends the action, and the operator steps on the foot switch. After the controller receives the signal from the foot switch, it automatically controls The servo motor starts to work, and the next dispensing cycle is repeated.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments. The technical solutions described are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

  1. 一种液相色谱仪高压恒流泵，其特征在于，包括泵体和泵盖，所述泵盖的前侧壁设有前面板，所述泵体安装于所述前面板上，所述泵体内设有伺服电机、凸轮、进液口和出液口，所述伺服电机的输出轴连接所述凸轮，所述进液口上连接有进液软管，所述出液口上连接有流量计，所述流量计的另一端口连接有出液软管；所述前面板上设有触摸屏，所述触摸屏内分别设有电源开关按键、分装按键和数据显示屏；所述泵盖内设有控制器，所述泵盖外设有脚踏开关，所述脚踏开关为电接触开关，所述电源开关按键、所述分装按键、所述脚踏开关和所述流量计分别连接所述控制器，所述控制器分别连接所述伺服电机和所述数据显示屏；所述前面板上还设有水平的滑槽，所述滑槽内设有与所述滑槽匹配的滑块，所述滑块可在所述滑槽内移动；所述滑块的前侧连接有夹环，所述出液软管固定于所述夹环内；所述泵盖内还设有滑块驱动电机，所述控制器连接所述滑块驱动电机，所述滑块驱动电机的输出轴连接有齿轮，所述齿轮的上方啮合有齿条，所述齿条固定连接于所述滑块的后侧；所述控制器可根据所述脚踏开关的输入信号，控制所述滑块驱动电机转动所述齿轮。A high-pressure constant-flow pump for a liquid chromatograph, characterized in that it includes a pump body and a pump cover, the front side wall of the pump cover is provided with a front panel, the pump body is mounted on the front panel, and the pump The body is provided with a servo motor, a cam, a liquid inlet and a liquid outlet, the output shaft of the servo motor is connected to the cam, the liquid inlet is connected with a liquid inlet hose, and the liquid outlet is connected with a flow meter, The other port of the flowmeter is connected with a liquid outlet hose; the front panel is provided with a touch screen, and the touch screen is respectively provided with a power switch button, a subassembly button and a data display screen; the pump cover is provided with Controller, the pump cover is provided with a foot switch, the foot switch is an electrical contact switch, the power switch button, the subassembly button, the foot switch and the flowmeter are respectively connected to the a controller, the controller is respectively connected to the servo motor and the data display screen; the front panel is also provided with a horizontal chute, and a slider matching the chute is arranged in the chute, The slider can move in the chute; the front side of the slider is connected with a clamp ring, and the liquid outlet hose is fixed in the clamp ring; the pump cover is also provided with a slider drive motor, the controller is connected to the slider drive motor, the output shaft of the slider drive motor is connected with a gear, a rack is meshed above the gear, and the rack is fixedly connected to the rear of the slider side; the controller can control the slider drive motor to rotate the gear according to the input signal of the foot switch.
  2. 根据权利要求1所述的液相色谱仪高压恒流泵，其特征在于，所述夹环为弹性硅胶材质。The high-pressure constant-flow pump for a liquid chromatograph according to claim 1, wherein the clamping ring is made of elastic silica gel.
  3. 根据权利要求1所述的液相色谱仪高压恒流泵，其特征在于，所述滑块驱动电机为步进电机。The high-pressure constant-current pump for a liquid chromatograph according to claim 1, wherein the slider drive motor is a stepping motor.
  4. 根据权利要求1所述的液相色谱仪高压恒流泵，其特征在于，所述夹环固定于所述出液软管上接近所述出液软管的出口位置处。The high-pressure constant-flow pump for a liquid chromatograph according to claim 1, wherein the clamp ring is fixed on the liquid outlet hose at a position close to the outlet of the liquid outlet hose.
  5. 根据权利要求1所述的液相色谱仪高压恒流泵，其特征在于，还包括工作台，所述泵盖放置于所述工作台上，所述脚踏开关位于所述工作台的下方。The high-pressure constant-flow pump for a liquid chromatograph according to claim 1, further comprising a workbench, the pump cover is placed on the workbench, and the foot switch is located below the workbench.
  6. 根据权利要求5所述的液相色谱仪高压恒流泵，其特征在于，所述泵盖的侧壁上设有与所述控制器连接的数据线接口，所述脚踏开关通过数据线安装于所述数据线接口上。The high-pressure constant-flow pump for a liquid chromatograph according to claim 5, wherein a data line interface connected to the controller is provided on the side wall of the pump cover, and the foot switch is installed through a data line on the data line interface.
PCT/CN2020/134427 2020-12-08 2020-12-08 High-voltage constant-current pump for liquid chromatograph WO2022120553A1 (en)

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CN107372033A (en) * 2017-07-26 2017-11-24 河海大学 Constant current frequency conversion irrigation system
CN207294146U (en) * 2017-09-30 2018-05-01 河北京鼎生物医药科技有限公司 Self-suction type liquid-filling machine
CN109538439A (en) * 2018-09-28 2019-03-29 江苏同济分析仪器有限公司 A kind of liquid chromatograph high pressure constant flow pump

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Publication number Priority date Publication date Assignee Title
CN86208432U (en) * 1986-11-29 1987-10-07 中国人民解放军第五医院 Multi-functional and automatic inject & suck tool for crystal cortex
CN202900565U (en) * 2012-11-12 2013-04-24 姜堰市环球仪器有限公司 Portable constant flow pump
CN202961492U (en) * 2012-12-31 2013-06-05 华北石油管理局总医院 Hot infusion chemotherapy device
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