Reagent quantitative injection device

Abstract

The utility model discloses a reagent quantitative injection device, which relates to the technical field of reagent addition, and comprises a mounting seat, a lifting plate, a movable plate and a fixed plate which are sequentially arranged from top to bottom, the mounting seat is fixedly connected with the fixed plate, the lifting plate is fixedly connected with the movable plate, and the lifting plate is driven by a linear driving mechanism to lift; a plurality of needle cylinders are fixedly connected to the fixed plate in the circumferential direction, piston rods are arranged on the inner sides of the needle cylinders, the ends, away from the needle cylinders, of the piston rods penetrate through the movable plate to be fixedly connected with limiting blocks, the piston rods are slidably connected with the movable plate, and a push rod driven by a servo motor to rotate is arranged at the lower end of the lifting plate. And the push rod corresponds to the piston rod in position. The reagent quantitative injection device can quantitatively add various reagents at the same time, and is simple in structure and small in occupied space; and the dosage is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of reagent addition, in particular to a reagent quantitative injection device. Background Art

[0002] Currently, there are several methods for measuring data, including electrode and chemical methods. However, market feedback suggests that, with the exception of more mature electrode sensors like pH and conductivity, most measurement indicators still rely on chemical methods. Chemical methods involve mixing different reagents to produce color changes and changes in absorbance. Optical sensors analyze and capture these changes through specific spectra, then combine them with the corresponding principle equations to produce the desired results. Based on this principle, the main factors influencing the results are reagent volume and sensor cleanliness.

[0003] To achieve accurate results, mixing the reagents is crucial, placing extremely high demands on the reagent dosing components. Currently, most devices on the market use stepper motor peristaltic pumps to add reagents, but this can lead to dosage deviations or even failure to add reagents due to aging reagent tubes. Furthermore, quantitative addition of multiple reagents often requires multiple peristaltic pumps, resulting in a complex structure and large space requirements.

[0004] Therefore, it is necessary to propose a reagent quantitative injection device to solve the above problems. Utility Model Content

[0005] (1) Technical problems solved

[0006] The purpose of the utility model is to provide a reagent quantitative injection device to solve the problems of deviation in dosage, complex structure and large space occupied by the existing reagent quantitative addition equipment proposed in the above background technology.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a reagent quantitative injection device, comprising a mounting seat, a lifting plate, a movable plate and a fixed plate arranged in sequence from top to bottom, the mounting seat is fixedly connected to the fixed plate, the lifting plate is fixedly connected to the movable plate, and the lifting plate is driven to rise and fall by a linear drive mechanism;

[0009] A plurality of syringes are fixedly connected to the fixed plate along the circumferential direction, a piston rod is provided on the inner side of the syringe, the end of the piston rod away from the syringe passes through the movable plate and is fixedly connected to a limiting block, the piston rod is slidably connected to the movable plate, and a push rod driven to rotate by a servo motor is provided at the lower end of the lifting plate, and the position of the push rod corresponds to that of the piston rod.

[0010] Preferably, the mounting seat is fixedly connected to the fixing plate via a sliding rod, and the lifting plate is slidably connected to the sliding rod.

[0011] Preferably, the linear drive mechanism is a screw stepper motor, the screw stepper motor is fixedly connected to the mounting seat, and the screw of the screw stepper motor is fixedly connected to the lifting plate.

[0012] Preferably, the axis of the syringe and the axis of the push rod are parallel to each other, and the push rod is fixedly connected to the output shaft of the servo motor through a connecting rod.

[0013] Preferably, the syringe is fixedly connected to the fixing plate by screws.

[0014] Preferably, the plurality of syringes are fixed on the fixed plate in a multi-layer circular array.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a reagent quantitative injection device with the following beneficial effects:

[0017] This reagent quantitative injection device is equipped with a linear drive mechanism, a servo motor, a push rod and multiple syringes, so that it can simultaneously perform quantitative addition of multiple reagents. Compared with peristaltic pump liquid addition, its structure is simpler and it occupies less space; there is no mechanical extrusion, and the dosage is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the structure of the utility model;

[0020] Figure 3 It is a top view schematic diagram of the fixing plate of the utility model.

[0021] In the figure: 1. Linear drive mechanism; 2. Mounting seat; 3. Lifting plate; 4. Servo motor; 5. Push rod; 6. Movable plate; 7. Piston rod; 8. Fixed plate; 9. Syringe; 10. Slide rod; 12. Limit block; 13. Screw; 14. Connecting rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-2As shown, a reagent quantitative injection device includes a mounting base 2, a lifting plate 3, a movable plate 6 and a fixed plate 8 arranged in sequence from top to bottom, the mounting base 2 is fixedly connected to the fixed plate 8, the lifting plate 3 is fixedly connected to the movable plate 6, and the lifting plate 3 is driven to rise and fall by a linear drive mechanism 1; a plurality of syringes 9 are fixedly connected to the fixed plate 8 in a circumferential direction, a piston rod 7 is provided on the inner side of the syringe 9, the end of the piston rod 7 away from the syringe 9 passes through the movable plate 6 and is fixedly connected to the limiting block 12, the piston rod 7 is slidably connected to the movable plate 6, and the lower end of the lifting plate 3 is provided with a push rod 5 driven to rotate by a servo motor 4, and the position of the push rod 5 corresponds to that of the piston rod 7.

[0024] During use, the bottom ends of multiple syringes 9 are immersed in different reagents, and the linear drive mechanism 1 is started. The linear drive mechanism 1 drives the piston rod 7 to rise through the movable plate 6 to extract the reagent; when adding reagents in a quantitative manner, the servo motor 4 drives the push rod 5 to rotate to the top of the syringe 9 storing the reagent to be added, and then the linear drive mechanism 1 drives the lifting plate 3 downward, and the push rod 5 pushes the piston rod 7 in the syringe 9 downward, thereby pushing out the reagent, and the piston rods 7 in other syringes 9 slide relative to the movable plate 6. After the reagent in the current syringe 9 is added, the linear drive mechanism 1 drives the push rod 5 to rise and reset, and the servo motor 4 drives the push rod 5 to rotate to the top of the next syringe 9, and this cycle is repeated, so that it can be used for quantitative addition of multiple reagents at the same time.

[0025] When the amount of reagent added is V, the stroke H of the linear drive mechanism 1 is: ; Wherein, r is the radius of the syringe 9.

[0026] In order to make the lifting plate 3 more stable, the mounting seat 2 is fixedly connected to the fixed plate 8 through a slide bar 10, and the lifting plate 3 is slidably connected to the slide bar 10. Preferably, the outer side of the slide bar 10 is provided with a sliding sleeve, and the lifting plate 3 is fixedly connected to the sliding sleeve.

[0027] In some embodiments, the linear drive mechanism 1 is a screw stepper motor, the screw stepper motor is fixedly connected to the mounting seat 2 , and the screw of the screw stepper motor is fixedly connected to the lifting plate 3 .

[0028] Specifically, the axis of the syringe 9 is parallel to the axis of the push rod 5, and the push rod 5 is fixedly connected to the output shaft of the servo motor 4 through the connecting rod 14. By setting the push rod 5 parallel to the piston rod 7, it is ensured that it can only act on one piston rod 7 at a time, avoiding affecting other piston rods 7.

[0029] Specifically, such as Figure 3 As shown, the needle cylinder 9 is fixedly connected to the fixing plate 8 via screws 13 .

[0030] In some embodiments, multiple syringes 9 are fixed on the fixed plate 8 in a multi-layer circular array. Figure 3As shown, multiple syringes 9 are arranged in double layers.

[0031] By arranging multiple layers of syringes 9, space utilization can be improved, allowing for the simultaneous addition of more reagents. Each layer of syringes 9 has a push rod 5 located above the multiple syringes 9. To ensure that the push rod 5 can only act on one piston rod 7 at a time, adjacent syringes 9 on different layers should be staggered.

[0032] Working principle: When extracting reagents, immerse the bottom ends of multiple syringes 9 into different reagents, start the linear drive mechanism 1, the linear drive mechanism 1 rises through the movable plate 6, and the movable plate 6 drives the piston rod 7 to rise through the limit block 12, thereby extracting the reagents through the syringes 9;

[0033] When adding reagents in a quantitative manner, the servo motor 4 drives the push rod 5 to rotate to the top of the syringe 9 storing the reagent to be added, and then the linear drive mechanism 1 drives the lifting plate 3 downward, and the push rod 5 pushes the piston rod 7 in the syringe 9 downward, thereby pushing out the reagent. After the reagent in the current syringe 9 is added, the linear drive mechanism 1 drives the push rod 5 to rise and reset, and the servo motor 4 drives the push rod 5 to rotate to the top of the next syringe 9. This cycle is repeated, making it suitable for the quantitative addition of multiple reagents at the same time.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reagent quantitative injection device, characterized in that: The device comprises a mounting seat (2), a lifting plate (3), a movable plate (6) and a fixed plate (8) arranged in sequence from top to bottom, wherein the mounting seat (2) is fixedly connected to the fixed plate (8), the lifting plate (3) is fixedly connected to the movable plate (6), and the lifting plate (3) is driven to rise and fall by a linear drive mechanism (1); A plurality of syringes (9) are fixedly connected to the fixed plate (8) along the circumferential direction, a piston rod (7) is provided on the inner side of the syringe (9), and the end of the piston rod (7) away from the syringe (9) passes through the movable plate (6) and is fixedly connected to the limit block (12), the piston rod (7) is slidably connected to the movable plate (6), and a push rod (5) driven to rotate by a servo motor (4) is provided at the lower end of the lifting plate (3), and the position of the push rod (5) corresponds to that of the piston rod (7).

2. A reagent quantitative injection device according to claim 1, characterized in that: The mounting seat (2) is fixedly connected to the fixed plate (8) via a sliding rod (10), and the lifting plate (3) is slidably connected to the sliding rod (10).

3. A reagent quantitative injection device according to claim 1, characterized in that: The linear drive mechanism (1) is a screw stepper motor, the screw stepper motor is fixedly connected to the mounting seat (2), and the screw of the screw stepper motor is fixedly connected to the lifting plate (3).

4. A reagent quantitative injection device according to claim 1, characterized in that: The axis of the needle cylinder (9) and the axis of the push rod (5) are parallel to each other, and the push rod (5) is fixedly connected to the output shaft of the servo motor (4) through a connecting rod (14).

5. A reagent quantitative injection device according to claim 1, characterized in that: The needle cylinder (9) is fixedly connected to the fixing plate (8) via screws (13).

6. A reagent quantitative injection device according to claim 1, characterized in that: The plurality of needle cylinders (9) are fixed on the fixed plate (8) in a multi-layer circular array.

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