Liquid adding and diluting device for medical clinical laboratory

Abstract

The utility model discloses a liquid adding and diluting device for medical clinical laboratory, which comprises a working table, a mounting rack, a diluent storage tank, a liquid adding component, a turntable, a vibration component and an intermittent pressing mechanism, the mounting rack is fixedly connected to the working table, the liquid adding component is mounted on the mounting rack, and the turntable is fixedly connected to the working table; the diluent storage tank is communicated with the diluent storage tank and is provided with a downward diluent outlet; the rotary table is horizontally arranged on the workbench, and the diluent outlet is located above the rotary table; the vibration assembly comprises a plurality of springs, and one end of each spring is fixedly connected with the upper surface of the rotating disc; the lower surface of the vibration plate is fixedly connected with the other ends of the multiple springs, and the multiple test tube fixing seats are sequentially and fixedly connected to the upper surface of the vibration plate in the circumferential direction; and the intermittent downward pressing mechanism is installed on the working table, and the intermittent downward pressing mechanism can press the vibration plate downwards in an intermittent mode.

Description

Technical Field

[0001] The present utility model belongs to the technical field of experimental instruments for medical laboratories, and specifically relates to a liquid adding and diluting device for medical laboratories. Background Art

[0002] In the routine, physiological, and biochemical test operations of medical examinations, it is often necessary to dilute the sample solution before processing and testing. The operation of adding liquid for dilution specifically refers to adding a rated amount of diluent to a rated amount of samples and fully and evenly mixing them to complete the dilution. This step often uses a liquid adding and diluting device. However, the existing liquid adding and diluting devices have various deficiencies.

[0003] For example, a liquid adding and diluting device for medical examinations provided by patent number 202320681788.1 has an additional small stirrer to ensure shaking. Although using the stirrer to shake can effectively accelerate the dilution and mixing of the liquid medicine, new problems have also arisen accordingly. First, in order to avoid contamination between samples, the blades of the stirrer need to be cleaned after each stirring, which is time-consuming and laborious. Especially when facing multiple specimens, the efficiency of liquid adding and dilution will decrease. Moreover, using a stirrer is likely to cause the liquid in the test tube to splash, which will also cause contamination, and the splashed liquid will also affect the accuracy of this dilution.

[0004] Another example is that such solutions use the method of oscillating from the outside. Usually, a shaker or a vibration platform is set up to shake, and there is a vibration motor inside to drive. The vibration motor has a high vibration frequency, but a very small amplitude. The advantage of manual shaking is that the swing amplitude of the arm is large. Therefore, using the method of driving the vibration platform by a vibration motor to shake requires a long time, and the long-term operation of the vibration motor will also generate a very large noise, which will also cause certain damage to the test tube.

[0005] Therefore, it is necessary to propose a new liquid adding and diluting device for medical laboratories to solve the above problems. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a liquid adding and diluting device for medical laboratories, aiming to be able to replace manual shaking, having a high shaking efficiency, and low noise.

[0007] To solve the above problems, the present utility model adopts the following technical solutions:

[0008] A liquid adding and diluting device for medical laboratories, including a workbench, a mounting frame, a diluent storage tank, a liquid adding component, a turntable, a vibration component, and an intermittent pressing mechanism;

[0009] The lower end of the mounting frame is fixedly connected to the upper end of the workbench, and the diluent storage tank is fixedly connected to the mounting frame; the liquid adding assembly is detachably connected to the mounting frame and its liquid inlet is connected to the diluent storage tank through a diluent delivery pipe, and its lower end is provided with a diluent outlet; the turntable is horizontally arranged below the diluent outlet and is rotatably connected to the workbench;

[0010] The vibration assembly includes a plurality of springs, a circular vibration plate and a plurality of test tube fixing seats, wherein the lower ends of the plurality of springs are fixedly connected to the upper end surface of the turntable; the vibration plate is horizontally arranged and located above the turntable and concentric with the turntable, and its lower end surface is fixedly connected to the upper ends of the plurality of springs; the bottoms of the plurality of test tube fixing seats are fixedly connected to the upper end surface of the vibration plate in sequence along the circumference of the vibration plate; a plurality of sample test tubes to be diluted are correspondingly plugged into the test tube fixing seats, and each of the test tube fixing seats can rotate with the turntable to correspond to the position directly below the diluent outlet;

[0011] The mounting end of the intermittent pressing mechanism is fixedly connected to the upper end of the workbench, and the working end of the intermittent pressing mechanism can intermittently press down the edge of the upper end of the vibration plate.

[0012] The beneficial effect of the utility model is that by rotating the turntable, the test tube openings of the sample test tubes on the vibration plate can be aligned with the diluent outlet of the liquid adding component in turn to complete the liquid adding dilution, and the vibration plate can be continuously pressed down and released by the intermittent pressing mechanism, and the elastic potential energy of the spring can be used to make the vibration plate vibrate up and down. The test tube fixing seat can ensure that the sample test tube remains stable during this process, and vibrates up and down with the vibration plate. At the same time, in conjunction with the rotation of the turntable, the solution in the sample test tube can be quickly shaken.

[0013] Compared with a stirring type device, the technical solution of the utility model does not need to clean the stirrer after each liquid addition and dilution, and can simultaneously complete vibration and shaking of multiple sample test tubes added with diluent; compared with a motor vibration type device, the vibration amplitude is large, time is saved, and the noise is small, and there will be no impact on the sample test tube body. It provides a new liquid addition and dilution device for medical laboratories, and successfully solves the technical problems in this field.

[0014] Furthermore, the intermittent pressing mechanism includes a driving motor, a reducer and a cam.

[0015] The mounting end of the driving motor is fixedly connected to the workbench, and the output end of the driving motor is arranged horizontally;

[0016] The reducer is drivingly connected to the output end of the drive motor;

[0017] The center of the cam base circle is fixedly connected to the output end of the reducer, and the flange end of the cam can abut against the upper surface of the vibrating plate.

[0018] A further beneficial effect of the present utility model is that the intermittent downward pressing of the vibrating plate is completed by a cam mechanism, and the structure is simple and reliable.

[0019] Furthermore, an insertion slot is provided at the upper end of the test tube fixing seat, and an elastic protective sleeve adapted to the shape of the sample test tube is provided in the insertion slot, and the inner diameter of the elastic protective sleeve is smaller than the outer diameter of the sample test tube.

[0020] A further beneficial effect of the present utility model is that the elastic protective sleeve inside the insertion slot can further prevent the sample test tube from being impacted, extend the service life of the sample test tube, and since the inner diameter of the elastic protective sleeve is smaller than the outer diameter of the sample test tube, it can wrap and slightly squeeze the outer wall of the sample test tube, playing a role in clamping the outer wall of the sample test tube, and can prevent the sample test tube from falling out of the test tube fixing seat during the up and down vibration with the vibrating plate.

[0021] Furthermore, it further includes a clamping member.

[0022] The mounting frame includes a vertical plate and a horizontal plate. The vertical plate is vertically and fixedly connected to the workbench; one end of the horizontal plate is fixedly connected to the upper end of the vertical plate, the diluent storage tank is fixedly connected to the upper end of the horizontal plate, one end of the clamping member is vertically and fixedly connected to one side surface of the vertical plate, and the other end has a clamping portion.

[0023] The liquid adding assembly includes: a liquid outlet cylinder, a one-way valve of the liquid outlet cylinder, a diluent delivery pipe and a one-way valve of the delivery pipe. The barrel wall of the liquid outlet cylinder is detachably connected to the clamping portion, and a diluent outlet is provided at the bottom of the liquid outlet cylinder; the one-way valve of the liquid outlet cylinder is detachably connected to the bottom of the liquid outlet cylinder to open and close the diluent outlet; one end of the diluent delivery pipe is connected to the top of the liquid outlet cylinder, and the other end of the diluent delivery pipe passes through the horizontal plate and communicates with the diluent storage tank; the one-way valve of the delivery pipe is installed in the diluent delivery pipe.

[0024] A further beneficial effect of the present utility model is that a liquid adding assembly is provided, which can obtain diluent from the diluent storage tank and add it to the sample test tube. The one-way valve of the liquid outlet cylinder can open and close the diluent outlet to achieve quantitative addition and ensure the accuracy of liquid addition and dilution.

[0025] Furthermore, there are multiple diluent storage tanks, and there are multiple diluent delivery pipes, which are in one-to-one correspondence with the number of diluent storage tanks and communicate with the diluent storage tanks.

[0026] A further beneficial effect of the present utility model is that different types of diluents can be stored in multiple storage tanks, and different types of liquid addition and dilution can be carried out.

[0027] Further, a chute is provided on the upper surface of the workbench. At one end of the bottom of the chute, a waste liquid collection port is provided corresponding to the position of the dilution liquid outlet. A slide plate is slidably connected in the chute. The slide plate can open and close the waste liquid collection port. The turntable is rotatably connected to the upper plate surface of the slide plate.

[0028] A further beneficial effect of the present utility model is that a waste liquid collection port is provided below the dilution liquid outlet to keep the surface of the workbench clean and prevent pollution. By using the slide plate to slide in the chute, the opening and closing of the waste liquid collection port can be realized, and it can also ensure that the sample test tube on the turntable can return directly below the dilution liquid outlet.

[0029] Further, it also includes a controller and a control panel. The controller is arranged in the workbench. The control panel is arranged on the workbench and is electrically connected to the controller. A liquid level sensor is provided on the inner wall of the liquid outlet cylinder. The liquid level sensor is electrically connected to the controller. The control panel has a liquid level change amount display screen. The one-way valve of the liquid outlet cylinder and the one-way valve of the delivery pipe are both solenoid valves and are electrically connected to the controller. The control panel can control the opening and closing of the solenoid valves.

[0030] A further beneficial effect of the present utility model is that the addition amount of the dilution liquid can be accurately controlled through the controller and the control board, further improving the accuracy of dilution.

[0031] Further, it also includes a test tube positioning rod.

[0032] The test tube positioning rod is an electric lifting rod. It is installed on the upper end surface of the workbench between the vertical plate and the chute. Its built-in motor is electrically connected to the controller. The rod body of the test tube positioning rod can abut against the tube wall of the sample test tube below the dilution liquid outlet.

[0033] A further beneficial effect of the present utility model is that by providing the test tube positioning rod, the sample test tube can be accurately positioned directly below the dilution liquid outlet.

[0034] Further, a recess adapted to the shape of the side wall of the sample test tube is provided on the abutting surface between the test tube positioning rod and the sample test tube.

[0035] A further beneficial effect of the present utility model is that by providing a recess adapted to the shape of the side wall of the sample test tube on the abutting surface between the test tube positioning rod and the sample test tube, the sample test tube can fit more closely to the test tube positioning rod, making the two more stable after abutting. Description of the Drawings

[0036] Figure 1 It is a complete schematic diagram of a liquid adding and diluting device for a medical laboratory department provided by the present utility model;

[0037] Figure 2 Side cross-sectional view of the test tube fixing base in a liquid adding and diluting device for medical laboratory inspection provided by the present utility model.

[0038] Reference numerals

[0039] 1. Workbench; 101. Slide groove; 102. Waste liquid collection port; 103. Slide plate

[0040] 2. Mounting frame; 201. Vertical plate; 202. Horizontal plate

[0041] 3. Diluent storage tank

[0042] 4. Liquid adding assembly; 401. Liquid outlet cylinder; 402. One-way valve of the liquid outlet cylinder; 403. Diluent delivery pipe

[0043] 5. Sample test tube

[0044] 6. Turntable

[0045] 7. Vibration assembly; 701. Spring; 702. Vibration plate; 703. Test tube fixing base; 703-1. Insertion slot; 703-2. Elastic protective sleeve

[0046] 8. Intermittent pressing mechanism; 801. Driving motor; 802. Cam

[0047] 9. Control panel

[0048] 10. Test tube positioning rod

[0049] 11. Clamping member Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0051] As Figure 1 described, a liquid adding and diluting device for medical laboratory inspection provided by the present utility model includes a workbench 1, a mounting frame 2, a diluent storage tank 3, a liquid adding assembly 4, a turntable 6, a vibration assembly 7, and an intermittent pressing mechanism 8.

[0052] The workbench 1 is a rectangular platform. The mounting rack 2 is placed on the upper surface of the workbench 1. The diluent storage tank 3 is installed on the top of the mounting rack 1. A certain proportion of diluent is stored in the diluent storage tank 3. The diluent can be water, physiological saline with different concentrations, or a diluent with a specific formula. The liquid adding component 4 is connected to the diluent storage tank 3 and is used to add the diluent in the diluent storage tank 3 into the sample test tube 5 to be diluted. The liquid adding component 4 has a downward diluent outlet and is equipped with a valve to open and close the diluent outlet to achieve quantitative addition.

[0053] The turntable 6 is installed on the upper surface of the workbench 1 and is located below the diluent outlet. The vibration component 7 is installed on the turntable 6 and rotates with the turntable. Specifically, the vibration component 7 includes a vibration plate 702, six test tube holders 703, and multiple springs 701. The vibration plate 702 is circular. The six test tube holders 703 are welded to the upper surface of the vibration plate 702 along the circumferential direction of the vibration plate 702. The interval of each test tube holder 703 is the same. The test tube holder 703 is used to fix the sample test tube 5. That is to say, in this embodiment, six sample test tubes 5 can be placed on the vibration plate 702 at a time. Several springs 701 are distributed at the bottom of the vibration plate 702. One end is directly fixed or fixed to the lower surface of the vibration plate 702 through a spring seat or a spring slot, and the other end is fixed to the upper surface of the turntable 6 in the same way. By rotating the turntable 6, the six sample test tubes 5 on the vibration plate 702 can be rotated to the directly below of the diluent outlet in turn. After opening the valve, a quantitative diluent can be added to the sample test tube.

[0054] The intermittent pressing mechanism 8 is installed on the workbench 1. Its function is to intermittently press down and release the vibration plate 702, and use the elastic potential energy of the spring 701 to drive the vibration plate 702 to vibrate up and down. The intermittent pressing mechanism 8 can continuously and automatically provide power for the vibration component 7.

[0055] To further improve the technical solution, the intermittent pressing mechanism 8 is an electric-driven cam mechanism, including a driving motor 801. The housing of the driving motor 801 is bolted or welded to the workbench 1, and the output shaft faces the horizontal direction; a speed reducer is installed on the output shaft of the driving motor 801, and a cam 802. The axle of the cam 802 is fixedly connected to the output shaft of the speed reducer and rotates slowly with the speed reducer. During this process, the flange part of the cam 802 intermittently abuts against the upper surface of the edge of the vibrating plate 702, and presses down the vibrating plate 702 to store energy for the spring as it continues to rotate. Until after rotating to a certain angle, the horizontal distance from the center of the base circle of the cam 802 to the flange of the cam 802 is less than the horizontal distance from the center of the base circle of the cam 802 to the edge of the vibrating plate 702. At this time, the flange leaves the edge of the vibrating plate 702. After losing the pressure, under the action of the elastic potential energy of the spring, the vibrating plate 702 rebounds and vibrates up and down under the action of the spring. The sample test tube 5 installed in the test tube fixing seat 703 also vibrates up and down with the vibrating plate to complete the vibration and mixing of the solution inside the sample test tube 5.

[0056] To further improve the technical solution, a plugging groove 703-1 adapted to the sample test tube 5 is opened in the test tube fixing seat 703. Specifically, it is a hollow cylinder with a spherical arc surface at the bottom, and an elastic protective sleeve 703-2 is closely attached to the inner wall of the plugging groove 703-1. The inner diameter of the elastic protective sleeve 703-2 is slightly smaller than the outer diameter of the sample test tube 5. Through the elastic protective sleeve 703-2, the sample test tube 5 can be further protected from impact, and the service life of the sample test tube 5 can be extended. At the same time, since the inner diameter of the elastic protective sleeve 703-2 is slightly smaller than the outer diameter of the sample test tube 5, the elastic protective sleeve 703-2 can wrap and squeeze the outer wall of the sample test tube 5, playing a role in clamping the outer wall of the sample test tube 5, and can prevent the sample test tube 5 from falling out of the test tube fixing seat 703 during the process of vibrating up and down with the vibrating plate 702.

[0057] To further improve the technical solution, the mounting bracket 2 includes a vertical plate 201 which is vertically arranged in a rectangular shape. The lower end is bolted to the upper surface of the workbench 1 or can be integrally formed with the workbench 1. A horizontal plate 202 is mounted on the top of the vertical plate 201 in the same way. The diluent storage tank 3 is placed on the top of the horizontal plate 202. A clamping member 11 extends from one side surface of the vertical plate 201 and has a clamping portion. The form of the clamping portion is not limited. The liquid adding assembly 4 includes a liquid outlet cylinder 401. The outer shape of the liquid outlet cylinder 401 is similar to a graduated cylinder, with a tapered lower end, and a small tube extends downward at the apex of the taper. The tube opening is the diluent outlet, and a one-way valve 402 for the liquid outlet cylinder is provided at the tube opening to open and close the diluent outlet. The upper part of the liquid outlet cylinder 401 is connected with a diluent delivery pipe 403. The other end of the diluent delivery pipe 403 leads to the diluent storage tank 3. A one-way valve for the delivery pipe is provided in the diluent delivery pipe 403. After opening the one-way valve for the delivery pipe, the diluent can be introduced into the liquid outlet cylinder 401, and then the diluent can be quantitatively added to different test tubes by using the one-way valve 402 for the liquid outlet cylinder.

[0058] To further improve the technical solution, multiple diluent storage tanks 3 can be provided. Different types or different concentrations of diluents are stored in the multiple diluent storage tanks 3, and correspondingly, multiple diluent delivery pipes 403 are provided to meet the requirements of different liquid adding and dilution. The multiple diluent storage tanks 3 are arranged side by side and fixed together on the horizontal plate 202, and at least one of the diluent storage tanks 3 stores distilled water. The purpose is to use distilled water to wash the liquid outlet cylinder 401 between different types of liquid adding and dilution, remove the residual diluent in the liquid outlet cylinder 401, and prevent cross-contamination between different types of diluents.

[0059] To further improve the technical solution, a waste liquid collection port 102 needs to be provided below the diluent outlet to collect the waste liquid from the washing. At the same time, in order not to conflict with the position of the turntable 6, a chute 101 is provided on the surface of the workbench 1. The waste liquid collection port 102 is opened at one end of the bottom of the chute 101 close to the diluent outlet. The waste liquid collection port 102 is communicated with a waste liquid bucket or a sewer in the laboratory. A sliding plate 103 is slidably connected in the chute 101. The turntable 6 and the vibration assembly 7 thereon are mounted on the sliding plate 103. Specifically, a rotating shaft is rotatably mounted on the surface of the sliding plate 103, and the bottom of the turntable 6 is mounted on the rotating shaft. The sliding plate 103 slides in the chute 101 to open and close the waste liquid collection port 102 at the bottom of the chute. When it is necessary to add diluent to the sample test tube 5, the sliding plate 103 is pushed to cover the waste liquid collection port 102 so that the sample test tube 5 can be aligned directly below the diluent outlet. When it is necessary to clean the liquid outlet cylinder 401, the sliding plate 103 is moved away to expose the waste liquid collection port 102 to collect the waste liquid from the upper washing.

[0060] To further improve the technical solution and make the dilution work more precise, a liquid addition method using electric control is adopted. Specifically, it includes a controller and a control panel 9. The controller is arranged in the workbench 1, and the control panel 9 is arranged on the workbench 1 and is electrically connected to the controller. A liquid level sensor is provided on the inner wall of the liquid outlet cylinder 401 and is electrically connected to the controller. Therefore, the liquid level sensor can obtain the data of the diluted liquid flowing out of the liquid outlet cylinder 401 according to the amount of the liquid level drop in the liquid outlet barrel, and transmit the data to the controller, so as to calculate the amount of the diluted liquid added. The control panel 9 has a display screen that can display the change amount of the diluted liquid in the liquid outlet cylinder 401. For the convenience of precise control, both the delivery pipe check valve and the liquid outlet cylinder check valve 402 are solenoid valves, which are signal-connected to the controller and controlled by the controller. An instruction to open or close the solenoid valve can be issued on the control panel 9, and the controller will open or close the solenoid valve after receiving the instruction.

[0061] To further improve the technical solution, it further includes a test tube positioning rod 10. The test tube positioning rod 10 is a common electric lifting rod, that is, the rod body of the test tube positioning rod 10 can rotate in a vertical plane. When the rod body of the test tube positioning rod 10 is lowered, it is in a horizontal state and hangs between the vibration plate 702 and the diluted liquid outlet. The side wall of the rod body of the test tube positioning rod 10 can abut against the side wall of the sample test tube 5 to prevent the sample test tube 5 from continuing to rotate with the turntable 6, and position the sample test tube 5 directly below the diluted liquid outlet.

[0062] To further improve the technical solution, a depression adapted to the outer wall shape of the sample test tube 5 is provided on the abutting surface between the test tube positioning rod 10 and the sample test tube 5, which can make the sample test tube 5 fit more closely to the rod body of the test tube positioning rod 10 and make the two more stable after abutting.

[0063] The specific use process of the present utility model is as follows:

[0064] Insert the sample test tubes to be diluted into the test tube fixing seats in turn, use the turntable and the test tube positioning tube to rotate these sample test tubes to directly below the liquid outlet cylinder in turn, select the diluted liquid according to the actual dilution needs, operate the control panel to quantitatively add the diluted liquid into the sample test tubes. When different types of diluted liquid are added, cleaning needs to be completed first. After all the diluted liquid is added, tighten the lids of the sample test tubes, start the motor, use the cam to intermittently press the vibration plate, and cooperate with the spring to complete the vibration and shaking, and finally obtain the diluted sample liquid.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid adding and diluting device for medical laboratory, characterized in that: include: A workbench (1), a mounting frame (2), a diluent storage tank (3), a liquid adding assembly (4), a rotating disk (6), a vibration assembly (7), and an intermittent pressing mechanism (8); The lower end of the mounting frame (2) is fixedly connected to the upper end of the workbench (1), and the diluent storage tank (3) is fixedly connected to the mounting frame (2); the liquid adding assembly (4) is detachably connected to the mounting frame (2) and its liquid inlet is connected to the diluent storage tank (3) through a diluent delivery pipe (403), and its lower end is provided with a diluent outlet; the turntable (6) is horizontally arranged and located below the diluent outlet and is rotatably connected to the workbench (1); The vibration assembly (7) comprises a plurality of springs (701), a circular vibration plate (702) and a plurality of test tube fixing seats (703), wherein the lower ends of the plurality of springs (701) are fixedly connected to the upper end surface of the turntable (6); the vibration plate (702) is horizontally arranged and located above the turntable (6) and concentric with the turntable (6), and its lower end surface is fixedly connected to the upper ends of the plurality of springs (701); the bottoms of the plurality of test tube fixing seats (703) are fixedly connected to the upper end surface of the vibration plate (702) in sequence along the circumference of the vibration plate (702); a plurality of sample test tubes (5) containing samples to be diluted are correspondingly plugged into the test tube fixing seats (703), and each of the test tube fixing seats (703) can rotate with the turntable (6) to correspond to the position directly below the diluent outlet; The mounting end of the intermittent pressing mechanism (8) is fixedly connected to the upper end of the workbench (1), and the working end of the intermittent pressing mechanism (8) can intermittently press down the edge of the upper end of the vibration plate (702).

2. A liquid adding and diluting device for medical laboratory according to claim 1, characterized in that: The intermittent pressing mechanism (8) comprises: a driving motor (801), a reducer and a cam (802). The mounting end of the driving motor (801) is fixed to the upper end surface of the workbench (1), and the output end of the driving motor (801) is arranged horizontally; The reducer is in driving connection with the output end of the drive motor (801); The wheel shaft of the cam (802) is fixedly connected to the output end of the reducer, and the cam (802) intermittently presses down the vibration plate (702).

3. A liquid adding and diluting device for medical laboratory according to claim 1, characterized in that: The upper end of the test tube fixing seat (703) is provided with a plug-in slot (703-1), and an elastic protective sleeve (703-2) matching the shape of the sample test tube (5) is arranged in the plug-in slot (703-1), and the inner diameter of the elastic protective sleeve (703-2) is smaller than the outer diameter of the sample test tube (5).

4. A liquid adding and diluting device for medical laboratory according to claim 1, characterized in that: It also includes a clamping member (11), The mounting frame (2) comprises a vertical plate (201) and a horizontal plate (202); the vertical plate (201) is vertically and fixedly connected to the workbench (1); one end of the horizontal plate (202) is fixedly connected to the upper end of the vertical plate (201); the diluent storage tank (3) is fixedly connected to the upper end of the horizontal plate (202); one end of the clamping member (11) is vertically and fixedly connected to a side surface of the vertical plate (201); and the other end has a clamping portion; The liquid adding assembly (4) comprises: a liquid discharge cylinder (401), a liquid discharge cylinder one-way valve (402), a diluent delivery pipe (403) and a delivery pipe one-way valve; the cylinder wall of the liquid discharge cylinder (401) is detachably connected to the clamping portion, and a diluent outlet is provided at the bottom of the liquid discharge cylinder (401); the liquid discharge cylinder one-way valve (402) is detachably connected to the bottom of the liquid discharge cylinder (401) to open and close the diluent outlet; the top of the liquid discharge cylinder (401) is connected to one end of the diluent delivery pipe (403), and the other end of the diluent delivery pipe (403) passes through the horizontal plate (202) to be connected to the diluent storage tank (3); and the delivery pipe one-way valve is installed in the diluent delivery pipe (403).

5. A liquid adding and diluting device for medical laboratory according to claim 4, characterized in that: There are a plurality of diluent storage tanks (3), and a plurality of diluent delivery pipes (403), which are connected to the diluent storage tanks (3) and the liquid outlet cylinder (401) in a one-to-one correspondence with the number of the diluent storage tanks (3).

6. A liquid adding and diluting device for medical laboratory according to claim 5, characterized in that: A slide groove (101) is provided on the upper surface of the workbench (1), a waste liquid collection port (102) is provided at one end of the bottom of the slide groove (101) corresponding to the position of the diluent outlet, a slide plate (103) is slidably connected in the slide groove (101), and the slide plate (103) can open and close the waste liquid collection port (102), and the turntable (6) is rotatably connected to the upper surface of the slide plate (103).

7. The liquid adding and diluting device for medical laboratory according to claim 5, characterized in that: Also includes a controller and a control panel (9), The controller is arranged in the workbench (1), the control panel (9) is arranged on the workbench (1) and is electrically connected to the controller, a liquid level sensor is arranged on the inner wall of the liquid discharge cylinder (401), and the liquid level sensor is electrically connected to the controller, the control panel (9) has a liquid level change display screen, and the liquid discharge cylinder one-way valve (402) and the delivery pipe one-way valve are both solenoid valves and are electrically connected to the controller.

8. A liquid adding and diluting device for medical laboratory according to claim 7, characterized in that: It also includes a test tube positioning rod (10), The test tube positioning rod (10) is an electric lifting rod, which is located between the vertical plate (201) and the turntable (6) and is installed on the upper end surface of the workbench (1). Its built-in motor is electrically connected to the controller. The rod body of the test tube positioning rod (10) can abut against the tube wall of the sample test tube (5) below the diluent outlet.

9. A liquid adding and diluting device for medical laboratory according to claim 8, characterized in that: A recess matching the shape of the outer wall of the sample test tube (5) is provided on the contact surface between the test tube positioning rod (10) and the sample test tube (5).

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