CN115624908A

CN115624908A - Liquid sample online dilution device and dilution method

Info

Publication number: CN115624908A
Application number: CN202211645281.7A
Authority: CN
Inventors: 张磊
Original assignee: Inverbo Technology Changzhou Co ltd
Current assignee: Inverbo Technology Changzhou Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-01-20

Abstract

The invention relates to the technical field of liquid dilution, in particular to an online liquid sample diluting device and a diluting method, which comprises a base, a first bracket, a second bracket and a controller, wherein the first bracket and the second bracket are respectively and fixedly connected to the left end and the right end of the rear side of the upper surface of the base, and the controller is arranged on the front side of the first bracket and further comprises: the diluent tank is placed on the upper surface of the first support and used for storing diluent; the first electromagnetic valve is arranged at the center of the bottom end of the diluent tank, is electrically connected with the controller and is used for discharging diluent in the diluent tank into the measuring cylinder; the honeycomb duct is installed the bottom of first solenoid valve, and the through-hole has all been seted up along circumference in the outer wall bottom of honeycomb duct. Have the repeated function of adding of diluent ration, labour saving and time saving when the sample testing is got the average value makes the glass stick be applicable to the stirring of liquid in the reagent bottle of different internal diameters, can not cause the liquid to spill over, guarantees the accuracy that the sample tested.

Description

Liquid sample online dilution device and dilution method

Technical Field

The invention relates to the technical field of liquid dilution, in particular to a liquid sample online dilution device and a dilution method.

Background

Refers to the process of adding more solvent to an existing solution to reduce its concentration. The concentration of the solution after dilution is reduced, but the total amount of solute is unchanged. After dilution, the sample is detected, and the concentration is reduced, so that the method has the advantages of small using amount of detection reagents, avoidance of measurement errors, high sensitivity and the like;

in the case of a large amount of a sample such as a chemical or food, a worker usually performs a manual dilution operation using a large-capacity syringe or other tool and shakes the sample horizontally to sufficiently fuse the sample with a diluent to perform detection;

need sampling test respectively to the coproduct, then the liquid of taking the average detects, and artifical dilution needs to operate repeatedly, wastes time and energy, and moreover, manual shaking reagent bottle, reagent splashes easily, if harmful reagent can harm human skin, spills over and also can influence the testing result.

Disclosure of Invention

The invention aims to overcome the defects that batch dilution cannot be carried out, the dilution process is time-consuming and labor-consuming, and the reagent bottle is easy to overflow due to shaking in the prior art, and the technical problem to be solved by the invention is an online liquid sample diluting device.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an online diluting device of liquid sample, includes base, first support, second support and controller, both ends about first support and second support fixed connection respectively are controlled at the upper surface rear side of base, the controller is installed in the front side of first support, still includes: the device comprises a diluent tank, a first electromagnetic valve, a flow guide pipe, a measuring cylinder, a second electromagnetic valve, a quantifying mechanism, an air cylinder, a mounting plate, a motor and a stirring mechanism;

the diluent tank is arranged on the upper surface of the first support and used for storing diluent; the first electromagnetic valve is arranged at the center of the bottom end of the diluent tank, and is electrically connected with the controller and used for discharging the diluent in the diluent tank into the measuring cylinder; the flow guide pipe is arranged at the bottom end of the first electromagnetic valve, and through holes are formed in the bottom end of the outer wall of the flow guide pipe along the circumferential direction, so that impact force generated by falling of diluent is blocked, and the liquid level of the diluent in the measuring cylinder is stably raised; the measuring cylinder is arranged on the lower surface of the first support and sleeved on the outer wall of the flow guide pipe, the bottom of the inner cavity of the measuring cylinder is an inclined plane inclined towards the center, and diluent required by sample dilution is measured; the second electromagnetic valve is arranged at the bottom end of the measuring cylinder; the quantitative mechanism is vertically arranged on the lower surface of the first support, and the addition amount of the diluent in the measuring cylinder is adjusted to obtain the diluent amount required by sample dilution; the cylinder is vertically arranged at the top end of the front side of the second support and is electrically connected with the controller, so that the stirring mechanism moves downwards to enter the reagent bottle; the mounting plate is mounted at the output end of the air cylinder; the motor is arranged on the front side of the mounting plate and is electrically connected with the controller; the stirring mechanism is installed the output of motor, the adjustment stirring diameter is suitable for different internal diameter reagent bottles and stirs and use.

Preferably, the dosing mechanism comprises: the limiting rod is vertically arranged on the lower surface of the first support, and the outer wall of the limiting rod is rectangular; the graduated scale is vertically adhered to the front side of the limiting rod and used for measuring the volume of the measuring cylinder; the first friction plate is vertically arranged on the right side wall of the limiting rod; the first sliding sleeve can be sleeved on the outer wall of the limiting rod in a vertically sliding mode, and a through hole is transversely formed in the center of the front side of the first sliding sleeve; the liquid level sensing alarm switch is arranged on the left side wall of the first sliding sleeve and is electrically connected with the controller; the box body is arranged on the right side wall of the first sliding sleeve; the limiting sleeve is fixedly connected to the right side of the inner cavity of the box body; the sliding rod is transversely inserted in the center of the limiting sleeve; the second friction plate is arranged at the left end of the sliding rod; the first spring is sleeved on the outer wall of the sliding rod; the sliding block is fixedly connected to the outer wall of the sliding rod, and the first spring is positioned between the sliding block and the limiting sleeve; the locking rod is rotatably arranged on the left side of the inner cavity of the box body through a pin shaft; the sliding block moves towards the left side under the action of the first spring, so that the sliding rod can drive the second friction plate to move left to be in contact with the first friction plate.

Preferably, the outer wall of the sliding rod is a regular polygon.

Preferably, the lower half part of the locking rod is in the shape of an eccentric wheel, and the upper half part of the locking rod is vertical.

Preferably, the front side through hole of the first sliding sleeve and the sensing point of the liquid level sensing alarm switch are on the same horizontal line.

Preferably, the stirring mechanism includes: the supporting plate is arranged at the output end of the motor; the number of the teeth is a plurality, and the teeth are arranged on the rear side of the inner wall of the supporting plate from left to right; the second sliding sleeve can slide left and right and is sleeved on the outer wall of the supporting plate; the glass rod is arranged at the center of the lower surface of the second sliding sleeve; the gear is mounted at the top of the inner cavity of the second sliding sleeve through a support and is in meshed connection with the teeth, and a tooth socket is formed in the center of the gear; the pressing rod can be inserted in the center of the upper surface of the second sliding sleeve in a vertical sliding mode; the brake disc is arranged at the bottom end of the pressure lever and is inserted into the inner cavity of the tooth groove; the second spring is installed between the brake disc and the inner cavity bottom end of the second sliding sleeve.

Preferably, the outer wall of the pressure lever is rectangular.

Preferably, the outer wall of the brake disc is serrated and is matched with the inner wall of the tooth groove.

Compared with the prior art, the invention has the following beneficial effects:

1. the locking rod is shifted to move right, the locking rod is enabled to extrude the sliding block to enable the sliding rod to move right, the second friction plate is separated from the first friction plate, the first sliding sleeve can move on the limiting rod at will, conversely, the locking rod is loosened, the first spring pushes the sliding rod to move left through the sliding block under the action of elasticity, the second friction plate is in contact with the first friction plate, the first sliding sleeve after moving is positioned, the function of quantitatively and repeatedly adding diluent is achieved, and time and labor are saved when a sample is detected and averaged;

2. according to the invention, the pressing rod is pressed downwards, the brake disc can move downwards to be separated from the tooth socket, the second sliding sleeve moves leftwards and rightwards, the gear rotates at the same time, the brake disc can be pushed upwards under the action of the elastic force of the second spring, the brake disc is contacted with the tooth socket to brake the gear, the position adjustment of the glass rod is realized, the glass rod is suitable for stirring liquid in reagent bottles with different inner diameters, the stirring is uniform, the liquid cannot overflow, and the accuracy of sample detection is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of a first bracket according to the present invention;

FIG. 3 is a schematic view of the dosing mechanism of the present invention;

FIG. 4 is a front sectional view of the dosing mechanism of the present invention;

FIG. 5 is a schematic view of the stirring mechanism of the present invention;

FIG. 6 is a top sectional view of the stirring mechanism of the present invention;

FIG. 7 is a front sectional view of the stirring mechanism of the present invention.

In the figure: 1. a base; 2. a first bracket; 3. a second bracket; 4. a controller; 5. a diluent tank; 6. a first solenoid valve; 7. a flow guide pipe; 8. a measuring cylinder; 9. a second solenoid valve; 10. a dosing mechanism; 11. a cylinder; 12. mounting a plate; 13. a motor; 14. a stirring mechanism; 101. a limiting rod; 102. a graduated scale; 103. a first friction plate; 104. a first sliding sleeve; 105. a liquid level sensing alarm switch; 106. a box body; 107. a limiting sleeve; 108. a slide bar; 109. a second friction plate; 1010. a first spring; 1011. a slider; 1012. a locking lever; 141. a support plate; 142. teeth; 143. a second sliding sleeve; 144. a glass rod; 145. a gear; 146. a tooth socket; 147. a pressure lever; 148. a brake disc; 149. a second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: an on-line liquid sample diluting device is shown in fig. 1-2 and comprises a base 1, a first support 2, a second support 3 and a controller 4, wherein the first support 2 and the second support 3 are respectively and fixedly connected to the left end and the right end of the rear side of the upper surface of the base 1, the controller 4 is installed on the front side of the first support 2, the controller 4 inputs a set program to start and stop a first electromagnetic valve 6, a second electromagnetic valve 9, a cylinder 11 and a motor 13, the device further comprises a diluent tank 5, the first electromagnetic valve 6, a flow guide pipe 7, a measuring cylinder 8, the second electromagnetic valve 9, a quantifying mechanism 10, the cylinder 11, an installation plate 12, the motor 13 and a stirring mechanism 14, and the diluent tank 5 is placed on the upper surface of the first support 2 and used for storing diluent; the first electromagnetic valve 6 is arranged at the center of the bottom end of the diluent tank 5, the first electromagnetic valve 6 is electrically connected with the controller 4, and the first electromagnetic valve 6 plays a role in discharging the diluent in the diluent tank 5 into the measuring cylinder 8; the flow guide pipe 7 is installed at the bottom end of the first electromagnetic valve 6, through holes are formed in the bottom end of the outer wall of the flow guide pipe 7 along the circumferential direction, outlets of the flow guide pipe 7 and the through holes are used for discharging diluent, and the flow guide pipe 7 blocks impact force when the diluent falls down to ensure that the liquid level of the diluent in the measuring cylinder 8 rises smoothly; the measuring cylinder 8 is arranged on the lower surface of the first support 2 and sleeved on the outer wall of the flow guide pipe 7, and the bottom of the inner cavity of the measuring cylinder 8 is an inclined plane inclined towards the center; the second electromagnetic valve 9 is arranged at the bottom end of the measuring cylinder 8; the quantitative mechanism 10 is vertically arranged on the lower surface of the first bracket 2; the cylinder 11 is vertically installed at the top end of the front side of the second support 3, and the cylinder 11 is electrically connected with the controller 4 and used for driving the stirring mechanism 14 to move downwards to enter the reagent bottle; the mounting plate 12 is arranged at the output end of the air cylinder 11; the motor 13 is installed on the front side of the installation plate 12, and the motor 13 is electrically connected with the controller 4 and used for driving the stirring mechanism 14 to rotate so that the stirring mechanism 14 has a stirring function; the stirring mechanism 14 is arranged at the output end of the motor 13;

the controller 4 is controlled to open the first electromagnetic valve 6, diluent in the diluent tank 5 flows out of the first electromagnetic valve 6 and enters the measuring cylinder 8 along the flow guide pipe 7, the flow guide pipe 7 blocks the falling impact force of the diluent, so that the liquid level of the diluent in the measuring cylinder 8 cannot generate waves, the measurement accuracy of the diluent is ensured, until the liquid level sensing alarm switch 105 senses the liquid level height of the diluent, the liquid level sensing alarm switch 105 feeds back an electric signal to the controller 4, the controller 4 closes the first electromagnetic valve 6, the second electromagnetic valve 9 is opened, the diluent in the measuring cylinder 8 flows into a reagent bottle, and the diluent is added;

operating in this way, the addition of diluent to the same product can be repeated.

As a preferable scheme, as shown in fig. 3-4, the quantitative mechanism 10 includes a limiting rod 101, a graduated scale 102, a first friction plate 103, a first sliding sleeve 104, a liquid level sensing alarm switch 105, a box 106, a limiting sleeve 107, a sliding rod 108, a second friction plate 109, a first spring 1010, a sliding block 1011 and a locking rod 1012, the limiting rod 101 is vertically installed on the lower surface of the first bracket 2, the outer wall of the limiting rod 101 is rectangular, and the first sliding sleeve 104 cannot rotate on the limiting rod 101; the graduated scale 102 is vertically adhered to the front side of the limiting rod 101, the graduated scale 102 is used for measuring the volume of the measuring cylinder 8, and the graduated scale 102 is used for measuring the volume of the measuring cylinder 8; the first friction plate 103 is vertically arranged on the right side wall of the limiting rod 101; the first sliding sleeve 104 can be sleeved on the outer wall of the limiting rod 101 in a vertically sliding manner, a through hole is transversely formed in the center of the front side of the first sliding sleeve 104, and the graduated scale 102 is observed through the through hole; the liquid level sensing alarm switch 105 is installed on the left side wall of the first sliding sleeve 104, and the liquid level sensing alarm switch 105 is electrically connected with the controller 4 and used for sensing the liquid level of the diluent in the measuring cylinder 8 to play a role in prompting; the box 106 is arranged on the right side wall of the first sliding sleeve 104; the limiting sleeve 107 is fixedly connected to the right side of the inner cavity of the box body 106; the slide bar 108 is transversely inserted in the center of the limiting sleeve 107; the second friction plate 109 is arranged at the left end of the sliding rod 108, and the second friction plate 109 is in contact with the first friction plate 103 to generate friction force so as to fix the first sliding sleeve 104; the first spring 1010 is sleeved on the outer wall of the sliding rod 108; the sliding block 1011 is fixedly connected to the outer wall of the sliding rod 108, the first spring 1010 is located between the sliding block 1011 and the limiting sleeve 107, and the sliding block 1011 can move leftwards under the action of the elastic force of the first spring 1010, so that the second friction plate 109 is in contact with the first friction plate 103; the locking rod 1012 is rotatably arranged on the left side of the inner cavity of the box body 106 through a pin shaft; under the action of the first spring 1010, the slider 1011 moves to the left, so that the slide rod 108 drives the second friction plate 109 to move left to contact with the first friction plate 103;

the reagent bottle containing the sample is placed on the base 1 and located below the second electromagnetic valve 9, the required dilution amount is calculated according to the sample amount, the locking rod 1012 is shifted rightwards, the locking rod 1012 is made to extrude the slider 1011 to drive the slide rod 108 to move rightwards, the slider 1011 extrudes the first spring 1010, the second friction plate 109 is separated from the first friction plate 103, the brake on the first sliding sleeve 104 is released, the first sliding sleeve 104 can be driven to move up and down on the outer wall of the limiting rod 101 until the scale 102 scale observed through the through hole of the first sliding sleeve 104 is consistent with the dilution amount, the locking rod 1012 is released, the slide rod 108 is pushed leftwards by the elasticity of the first spring 1010, the second friction plate 109 is in contact with the first friction plate 103, and the first sliding sleeve 104 which is adjusted is positioned.

Preferably, the outer wall of the sliding rod 108 is a regular polygon, so as to prevent the slider 1011 from rotating.

Preferably, the lower half of the locking bar 1012 is eccentric and the upper half is vertical, so that when the locking bar 1012 is pulled to move right, the locking bar 1012 can push the slider 1011 to move right, thereby moving the second friction plate 109 to the right.

Preferably, the front through hole of the first sliding sleeve 104 and the sensing point of the liquid level sensing alarm switch 105 are on the same horizontal line, and the scale on the graduated scale 102 observed on the through hole of the first sliding sleeve 104 is the quantitative standard of the volume of the measuring cylinder 8, so as to realize the determination of the diluent weighing.

As a preferable scheme, as shown in fig. 5 to 7, the stirring mechanism 14 includes a support plate 141, a tooth 142, a second sliding sleeve 143, a glass rod 144, a gear 145, a tooth groove 146, a pressure lever 147, a brake disc 148 and a second spring 149, wherein the support plate 141 is installed at the output end of the motor 13; the number of the teeth 142 is a plurality, the teeth are arranged on the rear side of the inner wall of the support plate 141 from left to right, and the gear 145 rotates when moving left and right under the action of the teeth 142; the second sliding sleeve 143 can slide left and right and is sleeved on the outer wall of the supporting plate 141; the glass rod 144 is arranged at the center of the lower surface of the second sliding sleeve 143, and the glass rod 144 can stir the liquid in the reagent bottle by rotating; the gear 145 is mounted on the top of the inner cavity of the second sliding sleeve 143 through a support, the gear 145 is meshed with the teeth 142, and the teeth grooves 146 are formed in the center of the gear 145; the pressure lever 147 can be inserted into the center of the upper surface of the second sliding sleeve 143 in a vertical sliding manner; the brake disc 148 is arranged at the bottom end of the pressure rod 147, and the brake disc 148 is inserted in the inner cavity of the tooth groove 146; a second spring 149 is installed between the brake disc 148 and the bottom end of the inner cavity of the second sliding sleeve 143, and the elastic force of the second spring 149 is used for pushing the brake disc 148 to move upwards;

moving the reagent bottle below the glass rod 144, pressing the pressure lever 147 downwards according to the inner diameter of the reagent bottle to make the brake disc 148 move downwards and extrude the second spring 149, so that the gear 145 has free movement capacity, shifting the second sliding sleeve 143 to move left and right on the support plate 141, rotating the gear 145 under the action of the teeth 142 until the glass rod 144 can stir the reagent bottle, loosening the pressure lever 147, moving the brake disc 148 upwards under the action of the elasticity of the second spring 149, inserting the brake disc 148 into the tooth groove 146 to brake the gear 145, and fixing the position of the glass rod 144;

the air cylinder 11 is driven by the controller 4 to drive the mounting plate 12 to move downwards, the glass rod 144 is inserted into the reagent bottle, the motor 13 drives the glass rod 144 to rotate, the glass rod 144 mixes the sample and the diluent in the reagent bottle, and the sample and the diluent can be used for detection after being fully mixed.

Preferably, the outer wall of the pressure lever 147 is rectangular to prevent the pressure lever 147 from rotating, and the brake disc 148 is inserted into the tooth slot 146 to realize braking.

Preferably, the outer wall of the braking disc 148 is serrated to match the inner wall of the tooth slot 146, and the braking disc 148 can be inserted into the tooth slot 146 from multiple directions to brake the rotating gear 145.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an online diluting device of liquid sample, includes base (1), first support (2), second support (3) and controller (4), both ends about first support (2) and second support (3) fixed connection are left and right sides in the upper surface rear side of base (1) respectively, install the front side at first support (2) controller (4), its characterized in that, the online diluting device of liquid sample still includes:

a diluent tank (5) placed on the upper surface of the first support (2);

the first electromagnetic valve (6) is installed at the center of the bottom end of the diluent tank (5), and the first electromagnetic valve (6) is electrically connected with the controller (4);

the flow guide pipe (7) is installed at the bottom end of the first electromagnetic valve (6), and through holes are formed in the bottom end of the outer wall of the flow guide pipe (7) along the circumferential direction;

the measuring cylinder (8) is arranged on the lower surface of the first support (2) and sleeved on the outer wall of the flow guide pipe (7), and the bottom of an inner cavity of the measuring cylinder (8) is an inclined plane inclined towards the center;

the second electromagnetic valve (9) is installed at the bottom end of the measuring cylinder (8);

the quantitative mechanism (10) is vertically arranged on the lower surface of the first bracket (2);

the cylinder (11) is vertically installed at the top end of the front side of the second support (3), and the cylinder (11) is electrically connected with the controller (4);

the mounting plate (12) is mounted at the output end of the air cylinder (11);

the motor (13) is arranged on the front side of the mounting plate (12), and the motor (13) is electrically connected with the controller (4);

and the stirring mechanism (14) is arranged at the output end of the motor (13).

2. An in-line dilution apparatus for liquid samples according to claim 1, wherein the dosing mechanism (10) comprises:

the limiting rod (101) is vertically arranged on the lower surface of the first support (2), and the outer wall of the limiting rod (101) is rectangular;

the graduated scale (102) is vertically adhered to the front side of the limiting rod (101), and the graduated scale (102) measures the volume of the measuring cylinder (8);

the first friction plate (103) is vertically arranged on the right side wall of the limiting rod (101);

the first sliding sleeve (104) is sleeved on the outer wall of the limiting rod (101) in a vertically sliding manner, and a through hole is transversely formed in the center of the front side of the first sliding sleeve (104);

the liquid level sensing alarm switch (105) is arranged on the left side wall of the first sliding sleeve (104), and the liquid level sensing alarm switch (105) is electrically connected with the controller (4);

a box (106) mounted on the right side wall of the first sliding sleeve (104);

the limiting sleeve (107) is fixedly connected to the right side of the inner cavity of the box body (106);

the sliding rod (108) is transversely inserted in the center of the limiting sleeve (107);

the second friction plate (109) is installed at the left end of the sliding rod (108);

the first spring (1010) is sleeved on the outer wall of the sliding rod (108);

the sliding block (1011) is fixedly connected to the outer wall of the sliding rod (108), and the first spring (1010) is positioned between the sliding block (1011) and the limiting sleeve (107);

the locking rod (1012) is rotatably arranged on the left side of the inner cavity of the box body (106) through a pin shaft;

under the action of the first spring (1010), the sliding block (1011) moves to the left, so that the sliding rod (108) drives the second friction plate (109) to move left to be in contact with the first friction plate (103).

3. The in-line liquid sample dilution apparatus according to claim 2, wherein the outer wall of the slide bar (108) is a regular polygon.

4. The in-line liquid sample dilution apparatus according to claim 3, wherein the locking lever (1012) has an eccentric shape in a lower half and a vertical shape in an upper half.

5. The liquid sample online dilution device according to claim 4, wherein the front through hole of the first sliding sleeve (104) and the sensing point of the liquid level sensing alarm switch (105) are on the same horizontal line.

6. An in-line liquid sample dilution apparatus as claimed in claim 5, wherein said agitation mechanism (14) comprises:

a support plate (141) installed at an output end of the motor (13);

a plurality of teeth (142) which are arranged on the rear side of the inner wall of the supporting plate (141) from left to right;

the second sliding sleeve (143) is sleeved on the outer wall of the supporting plate (141) in a left-right sliding manner;

the glass rod (144) is arranged at the center of the lower surface of the second sliding sleeve (143);

the gear (145) is mounted at the top of the inner cavity of the second sliding sleeve (143) through a support, the gear (145) is meshed with the teeth (142), and a tooth groove (146) is formed in the center of the gear (145);

the pressure lever (147) can be inserted in the center of the upper surface of the second sliding sleeve (143) in a vertically sliding manner;

the brake disc (148) is installed at the bottom end of the pressure rod (147), and the brake disc (148) is inserted into an inner cavity of the tooth groove (146);

and the second spring (149) is installed between the brake disc (148) and the bottom end of the inner cavity of the second sliding sleeve (143).

7. The in-line liquid sample dilution apparatus according to claim 6, wherein the outer wall of the plunger (147) is rectangular.

8. The on-line dilution apparatus for liquid samples according to claim 7, wherein the outer wall of the brake disk (148) is serrated to match the inner wall of the tooth slot (146).

9. The method for diluting the liquid sample online diluting device according to claim 8, comprising the following steps:

step (1): diluent in the diluent tank (5) flows out of the first electromagnetic valve (6) and enters the measuring cylinder (8) along the guide pipe (7), the guide pipe (7) blocks the falling impact force of the diluent, so that the liquid level of the diluent in the measuring cylinder (8) can not generate waves until the liquid level sensing alarm switch (105) senses the liquid level height of the diluent, the liquid level sensing alarm switch (105) feeds back an electric signal to the controller (4), the controller (4) closes the first electromagnetic valve (6), the second electromagnetic valve (9) is opened, the diluent in the measuring cylinder (8) flows into a reagent bottle, and the diluent is added;

step (2): placing a reagent bottle filled with a sample on a base (1) and positioned below a second electromagnetic valve (9), calculating the required diluent amount according to the sample amount, shifting a locking rod (1012) rightwards, releasing the braking of a first sliding sleeve (104), driving the first sliding sleeve (104) to move up and down on the outer wall of a limiting rod (101) until the scale (102) scale observed through a through hole of the first sliding sleeve (104) is consistent with the diluent amount, releasing the locking rod (1012), and positioning the shifted first sliding sleeve (104);

and (3): moving the reagent bottle below the glass rod (144), pressing the pressure lever (147) downwards according to the inner diameter of the reagent bottle to enable the gear (145) to have free movement capacity, shifting the second sliding sleeve (143) to move left and right on the supporting plate (141), rotating the gear (145) under the action of the teeth (142) until the glass rod (144) can stir the reagent bottle, loosening the pressure lever (147), inserting the brake disc (148) into the tooth groove (146) to brake the gear (145), and fixing the position of the glass rod (144);

and (4): the air cylinder (11) is driven by the controller (4) to drive the mounting plate (12) to move downwards, the glass rod (144) is inserted into the reagent bottle, the motor (13) drives the glass rod (144) to rotate, the glass rod (144) mixes the sample and the diluent in the reagent bottle, and the sample and the diluent can be used for detection after being fully mixed.