Automated drug weighing platform

Abstract

An automated reagent weighing platform includes a precision weighing device, a weight sensor embedded in the chassis of the precision weighing device, a reagent delivery device provided on the upper part of the chassis, the reagent delivery device including a reagent tube containing the reagent, an injector provided at one end of the reagent tube, a discharge pipe provided at the other end of the reagent tube, the diameter of the discharge pipe being smaller than the diameter of the reagent tube, the injector being a differential screw mechanism, the injector being driven by a first drive mechanism to move within the reagent tube, thereby pushing the reagent out of the discharge pipe and dropping it onto the chassis for weighing; an adjusting device is provided on the chassis of the weighing device, the adjusting device also including a second drive mechanism, the first drive mechanism, the second drive mechanism and the weight sensor are all electrically connected to a controller. The upper part of the precision weighing device of the present invention is provided with a reagent delivery device to achieve micro-discharging, thereby controlling the feeding speed.

Description

Technical Field

[0001] The invention belongs to the technical field of weighing, and in particular relates to an automatic precision weighing device. Background Art

[0002] Some chemical reactions require granular drugs. These drugs have varying degrees of adhesion, with some particles easily separating and others prone to agglomeration. Weighing these particles is no easy task, especially when weighing in milligram quantities. Accurate weighing requires considerable patience.

[0003] Taking the preparation of NiCoP as an example, a certain amount of nickel chloride, cobalt chloride, ammonium fluoride, and urea must be weighed, then distilled water is added and stirred thoroughly. The resulting solution is used in subsequent hydrothermal experiments. The weighing process presents a challenge due to the varying degrees of adhesion between the chemicals. For example, urea particles tend to separate, while ammonium fluoride or some hydrate particles tend to agglomerate.

[0004] Currently, precise weighing machines with weight sensors and displays are used, which require great patience when weighing various medicines. The operation time is too long and the human influence is large. Summary of the Invention

[0005] Therefore, when using the existing precision weighing device, in addition to the weight sensor, a set of auxiliary components needs to be designed to accurately weigh medicines of different particle sizes and different viscosity.

[0006] The object of the present invention is to provide an automated drug weighing platform, which can ensure the accurate measurement of trace drugs by adjusting the adjustment device of the reagent injector and the precision weigher.

[0007] The object of the present invention is achieved in the following manner:

[0008] An automated reagent weighing platform includes a precision weighing device, a weight sensor is embedded in the chassis of the precision weighing device, a reagent delivery device is provided on the upper part of the chassis, the reagent delivery device includes a reagent tube containing the reagent, an injector is provided at one end of the reagent tube, and a discharge pipe is provided at the other end of the reagent tube, the diameter of the discharge pipe is smaller than the diameter of the reagent tube, the injector is a differential screw mechanism, and the injector is driven by a first drive mechanism to move in the reagent tube, thereby pushing the reagent out of the discharge pipe and dropping it onto the chassis for weighing; an adjustment device is provided on the chassis of the weighing device, and the adjustment device includes a shell covered outside the weighing device, and the top of the shell is a frame structure. A residual material outlet is provided at one end of the shell, and a propeller is provided inside the shell. The propeller includes a propulsion rod, which extends into the shell through the side of the shell. A push plate is provided at the end of the propulsion rod extending into the shell. On the horizontal plane, the bottom surface of the push plate and the upper surface of the chassis are in the same plane, and the bottom size of the push plate is consistent with the upper surface size of the chassis. The adjustment device also includes a second driving mechanism. The propulsion rod moves toward the chassis under the drive of the driving mechanism. If the propulsion rod continues to move, the propulsion rod pushes out the reagent on the chassis, thereby achieving the purpose of adjusting the amount of reagent on the chassis. The first driving mechanism, the second driving mechanism and the weight sensor are all electrically connected to the controller.

[0009] The above-mentioned automated reagent weighing platform, the injector and the regulating device are respectively arranged on both sides of the precision weigher.

[0010] The above-mentioned automated reagent weighing platform, the injector includes a piston rod, a piston matching the reagent tube is provided at the end of the piston rod, an end cover is provided at the end of the reagent tube, there is a gap between the piston rod and the end cover or the piston rod and the end cover are threaded together, the end cover 2 is fixed on the frame 1, the piston rod extends out of the end cover, the piston rod is a screw 3 of a differential screw mechanism, and the piston rod extending out of the end cover is driven to rotate by the first driving mechanism.

[0011] The above-mentioned automated reagent weighing platform, the piston rod extending out of the end cover is provided with a driven wheel disc matching the piston rod, the driven wheel disc and the piston rod are threadedly matched, the driven wheel disc and the piston rod constitute a spiral pair of the differential screw transmission mechanism, the first driving wheel on the output shaft of the first driving mechanism is engaged with the first driven wheel disc, the first driving mechanism is fixed on the frame, and the outer diameter of the first driven wheel disc is larger than the outer diameter of the first driving wheel.

[0012] The above-mentioned automated reagent weighing platform, the outer surface of the propulsion rod extending out of the shell is provided with a thread, and a second driven wheel is sleeved on the propulsion rod, and the second driven wheel and the propulsion rod are threaded together. The second driving mechanism is fixed on the frame, and a second driving wheel is sleeved on the output shaft of the second driving mechanism, and the second driving wheel is meshed with the second driven wheel. The outer diameter of the second driven wheel is larger than the outer diameter of the second driving wheel.

[0013] The above-mentioned automated reagent weighing platform is provided with a reagent recovery hopper just below the residual material outlet.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are:

[0015] The precision weighing device of the present invention is equipped with a reagent delivery device on the upper part. The reagent delivery device uses a differential screw drive to push the piston rod to micro-feed, achieving micro-discharge, thereby controlling the feeding speed. The adjustment device of the weighing device can remove excess reagent from the weighing device, and is also regulated by the principle of micro-propulsion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 An automated reagent weighing platform shown in the figure includes a precision weighing device 16, a weight sensor is embedded in the chassis of the precision weighing device, a reagent delivery device 3 is provided on the upper part of the chassis, the reagent delivery device includes a reagent tube 4 containing the reagent, an injector 6 is provided at one end of the reagent tube, and a discharge pipe 2 is provided at the other end of the reagent tube, the diameter of the discharge pipe is smaller than the diameter of the reagent tube, the injector is a differential screw mechanism, and the injector is driven by a first drive mechanism to move in the reagent tube, thereby pushing the reagent out of the discharge pipe and falling onto the chassis for weighing; an adjusting device 12 is provided on the chassis of the weighing device, and the adjusting device includes a shell 13 covered outside the weighing device, the top of the shell is a frame structure, and one end of the shell is provided with The residual material outlet 18 is provided with a propeller in the shell. The propeller includes a propeller rod 15, which extends into the shell through the side of the shell. The end of the propeller rod extending into the shell is provided with a push plate 14. The bottom surface of the push plate and the upper surface of the chassis are in the same plane on the horizontal plane, and the bottom size of the push plate is consistent with the upper surface size of the chassis to ensure that when the reagent is in excess, the propeller rod moves toward the accurately weighed chassis, driving the push plate to push the medicine on the chassis toward the residual material outlet. The adjustment device also includes a second driving mechanism 7. The propeller rod moves toward the chassis under the drive of the driving mechanism. If the propeller rod continues to move, the propeller rod will push the reagent on the chassis out and drop it into the reagent recovery bucket 18 provided just below the residual material outlet. In this way, the purpose of adjusting the amount of reagent on the chassis is achieved. The first driving mechanism and the second driving mechanism are both electrically connected to the controller, and the further weight sensor is also electrically connected to the controller.

[0018] For the convenience of operation, the injector and the regulating device of the present invention are respectively arranged on both sides of the precision weighing device, or can be arranged on the same side.

[0019] Furthermore, the adjusting device is a differential screw transmission mechanism, the outer surface of the propulsion rod extending out of the shell is provided with a thread, and a second driven wheel disc 11 is sleeved on the propulsion rod, and the second driven wheel disc and the propulsion rod are threaded together. The second driving mechanism 7 is fixed to the frame, and a second driving wheel 8 is sleeved on the output shaft of the second driving mechanism. The second driving wheel is engaged with the second driven wheel disc 11 through the second transmission wheel 10. The outer diameter of the second driven wheel disc and the outer diameter of the second driving wheel are both smaller than the outer diameter of the second transmission wheel 10. The second transmission wheel is arranged on the bearing seat through a bearing, and the bearing seat 9 is fixed to the frame. The second driven wheel disc 11 and the propulsion rod 15 constitute a spiral pair, and the second driving wheel 8, the second transmission wheel 10 and the second driven wheel disc 11 constitute the driving mechanism of the differential screw transmission mechanism.

[0020] Furthermore, the injector is a differential screw transmission mechanism, including a piston rod 19, a piston matched with the reagent tube is provided at the end of the piston rod, an end cap 5 is provided at the end of the reagent tube, there is a gap between the piston rod and the end cap or the piston rod and the end cap are threaded, the end cap 5 is fixed to the frame 1, the piston rod extends out of the end cap, the piston rod is a screw of the differential screw mechanism, the piston rod extending out of the end cap is driven to rotate by the first drive mechanism, the first drive mechanism has the same structure as the second drive frame, which is not shown in the figure, and its specific structure includes a piston rod extending out of the end cap is provided with a piston matched with the active The first driven wheel disc matches the plug rod, and the first driven wheel disc and the piston rod are threadedly matched. The first driven wheel disc and the piston rod constitute a spiral pair of the differential screw transmission mechanism. The first driving wheel on the output shaft of the first driving mechanism is engaged with the first driven wheel disc through the first transmission wheel. The first driving mechanism is fixed on the frame. The outer diameter of the first driven wheel disc and the outer diameter of the first driving wheel are both smaller than the outer diameter of the first transmission wheel. The first driving wheel, the first transmission wheel and the first driven wheel disc constitute the driving mechanism of the differential screw transmission mechanism. The first transmission wheel is arranged on the bearing seat through a bearing, and the bearing seat is fixed to the frame.

[0021] The reagent tube 4 of the present invention is connected to the discharge tube 2 by a tapered tube 2. The longitudinal section of the tapered tube is a right-angled trapezoid, and the right angle line coincides with the bottom of the reagent tube. In this way, the diameter of the tapered tube gradually decreases to be consistent with the diameter of the discharge tube, ensuring that the injector can push the reagent into the discharge port without any obstruction. Moreover, the diameter of the discharge tube is smaller than the diameter of the reagent tube, ensuring that the amount of material discharged at one time is small, which is convenient for controlling the discharge amount.

[0022] The specific working process of the present invention is as follows:

[0023] The reagent is placed in the reagent tube. The controller controls the first drive mechanism to slowly move the piston rod of the injector and the discharge port, pushing the reagent out and dropping it onto the chassis of the precision scale. The weight information is displayed on the display of the precision scale and transmitted to the controller. If the weight is insufficient, the first drive mechanism is prompted to continue working. If the weight is correct, the controller stops the first drive mechanism. If the weight exceeds the required weight, the controller activates the second drive mechanism of the adjustment mechanism, causing the propulsion rod to move toward the chassis and the residual material outlet, pushing the reagent in the chassis toward the residual material outlet. Part of the reagent is pushed out and falls into the reagent recovery hopper. When the precision scale displays the correct weight, the controller stops the second drive mechanism. This completes the weighing of the reagent.

[0024] The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An automated reagent weighing platform, comprising a precision weighing device, wherein a weight sensor is embedded in the chassis of the precision weighing device, characterized in that: A reagent delivery device is provided on the upper part of the chassis. The reagent delivery device includes a reagent tube for containing the reagent, an injector is provided at one end of the reagent tube, and a discharge pipe is provided at the other end of the reagent tube. The diameter of the discharge pipe is smaller than that of the reagent tube. The injector is a differential screw mechanism. The injector is driven by a first driving mechanism to move in the reagent tube, thereby pushing the reagent out of the discharge pipe and dropping it onto the chassis for weighing; the injector includes a piston rod, a piston matching the reagent tube is provided at the end of the piston rod, an end cap is provided at the end of the reagent tube, and a gap is formed between the piston rod and the end cap or a gap is formed between the piston rod and the end cap. The covers are threaded together, the end covers are fixed to the frame, the piston rod extends out of the end covers, the piston rod is a screw of a differential screw mechanism, and the piston rod extending out of the end cover is driven to rotate by the first driving mechanism; an adjusting device is provided on the chassis of the weighing device, the adjusting device includes a shell cover arranged outside the weighing device, the top of the shell is a frame structure, one end of the shell is provided with a residual material outlet, a propeller is provided in the shell, the propeller includes a propeller rod, the propeller rod passes through the side of the shell and extends into the shell, a push plate is provided at the end of the propeller rod extending into the shell, and the bottom surface of the push plate is aligned with the upper surface of the chassis on the horizontal plane. The surfaces are in the same plane, and the bottom size of the push plate is consistent with the upper surface size of the chassis. The adjustment device also includes a second driving mechanism. The push rod moves toward the chassis under the drive of the driving mechanism. When the push rod continues to move, the push rod pushes out the reagent on the chassis, thereby achieving the purpose of adjusting the amount of reagent on the chassis. The weight sensor, the first driving mechanism and the second driving mechanism are all electrically connected to the controller; the piston rod extending out of the end cover is provided with a driven wheel matched with the piston rod, and the driven wheel and the piston rod are threaded together. The driven wheel and the piston rod constitute a differential screw transmission mechanism The spiral pair of the first driving wheel on the output shaft of the first driving mechanism is engaged with the first driven wheel disc, the first driving mechanism is fixed to the frame, and the outer diameter of the first driven wheel disc is larger than the outer diameter of the first driving wheel; the outer surface of the propulsion rod extending out of the shell is provided with a thread, and the second driven wheel disc is sleeved on the propulsion rod, and the second driven wheel disc and the propulsion rod are threaded together, the second driving mechanism is fixed to the frame, and the second driving wheel is sleeved on the output shaft of the second driving mechanism, and the second driving wheel is engaged with the second driven wheel disc, and the outer diameter of the second driven wheel disc is larger than the outer diameter of the second driving wheel.

2. The automated reagent weighing platform according to claim 1, characterized in that: The injector and the regulating device are respectively arranged on both sides of the precision weigher.

3. The automated reagent weighing platform according to claim 1 is characterized in that a reagent recovery hopper is provided directly below the residual material outlet.

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