High-precision trace liquid automatic filling device

Abstract

The utility model relates to the field of filling devices, in particular to a high-precision automatic micro-liquid filling device which comprises an injection pump bottom plate, a sample injector, a sliding block and a lead screw motor, the side wall of one side of the injection pump bottom plate is provided with a sample injector baffle and a sample injector base, the sample injector is fixed between the sample injector baffle and the sample injector base, the injection pump bottom plate is provided with a guide rail, and the guide rail is connected with the sliding block. The sliding block is slidably connected to the guide rail, a pull rod fixing seat is arranged on the sliding block and fixedly connected with a pull rod of the sample injector, a motor fixing plate and a lead screw fixing plate are arranged on the other side of the injection pump bottom plate, the lead screw motor is fixed to the motor fixing plate, and a lead screw of the lead screw motor penetrates through the motor fixing plate to be rotationally connected with the lead screw fixing plate. The lead screw is in threaded connection with the sliding block. The integrated lead screw motor is high in coaxiality and not prone to loosening, and the filling precision can be improved. The external thread sample injector is directly connected with the silica gel hose, the structure is simple, the number of connecting pieces is small, the structural sealing performance is improved, and the filling precision can be improved.

Description

Technical Field

[0001] The present application relates to the field of filling devices, and in particular to a high-precision automatic filling device for trace liquids. Background Art

[0002] From the perspective of material packaging, it can be divided into liquid filling machines, paste filling machines, powder filling machines and granule filling machines; from the perspective of the degree of production automation, it can be divided into semi-automatic filling machines and fully automatic filling production lines. Among them, in the medical field, when processing and producing liquids such as reagents, liquid filling machines are needed for liquid filling.

[0003] In the prior art, liquid filling generally adopts negative pressure filling, pressure filling and gravity filling. The first two filling methods have more sealing points and complex structures, while the latter filling method has a simple structure and is typically represented by funnel filling. However, the above filling methods all have the problems of large measurement errors and low filling accuracy. Utility Model Content

[0004] In order to improve the problem of low filling accuracy, the present application provides a high-precision trace liquid automatic filling device.

[0005] The present application provides a high-precision micro-liquid automatic filling device that adopts the following technical solutions:

[0006] A high-precision trace liquid automatic filling device comprises: an injection pump base plate, an injector, a slider and a screw motor, wherein a side wall of one side of the injection pump base plate is provided with an injector baffle and an injector base, the injector is fixed between the injector baffle and the injector base, the injection pump base plate is provided with a guide rail, the slider is slidably connected to the guide rail, a pull rod fixing seat is provided on the slider, the pull rod fixing seat is connected and fixed to the pull rod of the injector, a motor fixing plate and a screw fixing plate are provided on the other side of the injection pump base plate, the screw motor is fixed to the motor fixing plate, the screw of the screw motor passes through the motor fixing plate and is rotatably connected to the screw fixing plate, and the screw is threadedly connected to the slider.

[0007] In one embodiment, the bottom plate of the injection pump is provided with a sensor, and the side wall of the slider is provided with a sensor shielding plate.

[0008] The high-precision micro-liquid automatic filling device provided in the embodiment of the present disclosure can achieve the following technical effects:

[0009] In this embodiment, the screw motor adopts an integrated structure, so that the screw motor has high coaxiality and is not easy to loosen, which helps to improve the filling accuracy. The injector adopts an external thread injector and is directly connected to the silicone hose. It has a simple structure and few connecting parts, which improves the sealing of the structure, thereby helping to improve the filling accuracy and reducing the malfunction caused by excessive looseness of mechanical connecting parts during use.

[0010] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a high-precision trace liquid automatic filling device provided in an embodiment of the present application.

[0012] Explanation of the accompanying reference numerals: 1. Syringe pump base plate; 2. Injector; 3. Slider; 4. Screw motor; 5. Screw; 6. Injector baffle; 7. Injector base; 8. Guide rail; 9. Tie rod fixing seat; 10. Motor fixing plate; 11. Screw fixing plate; 12. Syringe pump fixing plate; 13. Sensor; 14. Sensor shielding plate; 15. Circuit board. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0014] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0015] The following is combined with Figure 1 This application is described in further detail.

[0016] A high-precision micro-liquid automatic filling device comprises: an injection pump base plate 1, an injector 2, a slider 3 and a screw motor 4. A side wall of one side of the injection pump base plate 1 is provided with an injector baffle 6 and an injector base 7. The injector 2 is fixed between the injector baffle 6 and the injector base 7. The injection pump base plate 1 is provided with a guide rail 8. The slider 3 is slidably connected to the guide rail 8. A pull rod fixing seat 9 is provided on the slider 3. The pull rod fixing seat 9 is connected and fixed to the pull rod of the injector 2. A motor fixing plate 10 and a screw fixing plate 11 are provided on the other side of the injection pump base plate 1. The screw motor 4 is fixed to the motor fixing plate 10. The screw 5 of the screw motor 4 passes through the motor fixing plate 10 and is rotatably connected to the screw fixing plate 11. The screw 5 is threadedly connected to the slider 3.

[0017] Initially, the motor is turned on to drive the screw 5 to rotate, thereby driving the slider 3 to move toward the screw fixing plate 11, thereby driving the pull rod to move, so that the injector 2 absorbs liquid; after reaching the set position, the motor rotates in the opposite direction, driving the slider 3 to move away from the screw fixing plate 11, thereby realizing the liquid discharging action.

[0018] In this embodiment, the screw motor 4 adopts an integrated structure, so that the screw motor 4 has high coaxiality and is not easy to loosen, which helps to improve the filling accuracy. The injector 2 adopts an external thread injector 2 and is directly connected to the silicone hose. It has a simple structure and few connecting parts, which improves the sealing of the structure, thereby helping to improve the filling accuracy and reducing the malfunction caused by excessive looseness of mechanical connecting parts during use.

[0019] In the actual working process, the filling device is provided with an integrated circuit board 15 , which is used to compile the filling device and issue instructions to the lead screw motor 4 .

[0020] In one embodiment, a sensor 13 is disposed on the bottom plate 1 of the injection pump, and a sensor shielding plate 14 is disposed on the side wall of the slider 3 .

[0021] When the sensor shielding plate 14 moves to the position of the sensor 13 during liquid discharge, the screw motor 4 stops rotating, and the entire action of liquid suction and liquid discharge is completed.

[0022] In one embodiment, the syringe pump base plate 1 is provided with a syringe pump fixing plate 12, which can be used to connect and fix the device with other devices.

[0023] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision micro-liquid automatic filling device, characterized in that: include: The syringe pump base plate, the injector, the slider and the screw motor, the side wall of one side of the syringe pump base plate is provided with an injector baffle and an injector base, the injector is fixed between the injector baffle and the injector base, the syringe pump base plate is provided with a guide rail, the slider is slidably connected to the guide rail, the slider is provided with a pull rod fixing seat, the pull rod fixing seat is connected and fixed to the pull rod of the injector, the other side of the syringe pump base plate is provided with a motor fixing plate and a screw fixing plate, the screw motor is fixed to the motor fixing plate, the screw of the screw motor passes through the motor fixing plate and is rotatably connected to the screw fixing plate, and the screw is threadedly connected to the slider.

2. The high-precision micro-liquid automatic filling device according to claim 1 is characterized in that: The injection pump bottom plate is provided with a sensor, and the sliding block side wall is provided with a sensor shielding plate.

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