Medicament mixing device for medical detection

Abstract

The invention relates to the technical field of liquid mixing, and particularly discloses a medicine mixing device for medical detection, which comprises a shell, a bearing plate arranged at the inner bottom of the shell, a supporting plate arranged on the bearing plate, a plurality of sample tubes vertically arranged on the supporting plate, and a plurality of liquid adding devices arranged at the inner upper end of the shell, the first driving device is used for driving the liquid adding device to move in the vertical direction, and the second driving device is used for driving the liquid adding device to move in the horizontal direction; the liquid adding device comprises a horizontally-arranged long-strip-shaped liquid adding plate, a liquid storage tank formed in the upper end of the liquid adding plate, a plurality of liquid storage holes formed in the liquid storage tank, liquid adding nozzles arranged at the lower ends of the liquid storage holes, a sealing cover arranged at the upper end of the liquid storage tank in a covering mode, a liquid inlet pipe, a liquid outlet pipe and a liquid supply device, wherein the liquid inlet pipe and the liquid outlet pipe are connected with the two ends of the liquid storage tank respectively. And the pressurizing device is connected with the liquid inlet pipe. The medicament mixing device for medical detection disclosed by the invention can efficiently add a reagent into a sample for mixing treatment.

Description

Technical Field

[0001] The invention relates to the technical field of liquid mixing, and in particular to a drug mixing device for medical detection. Background Art

[0002] Medical testing is the examination of materials taken from the human body in the fields of microbiology, immunology, biochemistry, genetics, hematology, biophysics, cytology, etc. Various photoelectric instruments and chemical reagents are usually used to complete experimental analysis.

[0003] At present, most medical tests use special testing equipment to directly analyze and obtain data. However, before using the testing equipment, samples need to be processed manually. Common processing methods mainly include reagent addition, mixing, centrifugation and other operations. Especially for laboratory experimental operations, a batch of samples usually contains a large number of experimental samples, control samples, parallel samples, etc. For manual operation, a large number of repeated steps such as adding agents, mixing, adding agents, and remixing are required. It is a considerable operating intensity for workers, and different types of tests require different types and quantities of reagents to be added and mixed. There is a certain error rate for pure manual operation. The functions of existing automated liquid adding and mixing equipment are too single. Usually, one device can only be used to handle one test and is difficult to adjust. Summary of the invention

[0004] The object of the present invention is to provide a drug mixing device for medical detection, which can efficiently add reagents into samples for mixing treatment.

[0005] The present invention is achieved through the following technical solutions: the drug mixing device for medical testing of the present invention comprises a shell, a supporting plate arranged at the bottom of the shell, a supporting plate placed on the supporting plate, a plurality of sample tubes vertically arranged on the supporting plate, a plurality of liquid adding devices arranged at the upper end of the shell, a first driving device for driving the liquid adding device to move in a vertical direction, and a second driving device for driving the liquid adding device to move in a horizontal direction; the liquid adding device comprises a horizontally arranged long strip liquid adding plate, a liquid storage tank opened at the upper end of the liquid adding plate, a plurality of liquid storage holes opened in the liquid storage tank, a liquid adding nozzle arranged at the lower end of the liquid storage hole, a sealing cover arranged at the upper end of the liquid storage tank, a liquid inlet pipe and a liquid discharge pipe respectively connected to the two ends of the liquid storage tank, a liquid supply device connected to the liquid inlet pipe, and a pressurizing device connected to the liquid inlet pipe.

[0006] Furthermore, the liquid adding nozzle is a cone with a larger top and a smaller bottom; a float is provided in the liquid adding nozzle, and the density of the float is less than the density of water; baffles are provided on both opposite sides of the upper end of the liquid adding nozzle, and the gap between a pair of baffles is smaller than the diameter of the float.

[0007] Furthermore, a suction pipe is provided on the side wall of the lower end of the liquid adding nozzle, and the suction pipe is connected to a negative pressure device; when there is no liquid in the liquid adding nozzle, the contact point between the float and the liquid adding nozzle is located below the connection point between the suction pipe and the liquid adding nozzle.

[0008] Furthermore, the sealing cover is provided with a plurality of sliding holes along the length direction, and a sliding rod is provided in the sliding hole for sealing and sliding. The upper ends of the plurality of sliding rods are simultaneously connected with an adjusting plate, and a vertically arranged first telescopic cylinder is fixedly provided on the upper side of the adjusting plate; the lower end of the sliding rod is arranged in the liquid storage hole; and the telescopic rod of the first telescopic cylinder is fixedly connected to the upper side of the sealing cover.

[0009] Furthermore, a plurality of limit tubes are provided on the adjustment plate, and a plurality of limit rods are provided on the upper side of the sealing cover; the limit rods pass through the adjustment plate and are slidably arranged in the limit tubes; a plurality of annular water retaining strips are provided at the bottom of the liquid storage tank; the water retaining strips are arranged at the upper end of the liquid storage hole.

[0010] Furthermore, it also includes a horizontally arranged long strip sealing plate, and a plurality of sealing grooves opened on the lower side of the sealing plate; the plurality of sealing grooves are interconnected; along the horizontal direction, the liquid adding plate and the sealing plate are alternately arranged; the sealing plate is connected to the first driving device and the second driving device at the same time; the diameter of the sealing groove is larger than the outer diameter of the upper end of the sample tube; the support plate is connected to a vibration device.

[0011] Furthermore, a hemispherical hollow rubber block is provided in the sealing groove, and adjacent rubber blocks are connected to each other; the rubber blocks are adhered to the inner wall of the sealing groove by an adhesive.

[0012] Furthermore, a plurality of fixing components are provided on the support plate, and one of the sample tubes is provided in one of the fixing components; the fixing components include a plurality of S-shaped fixing bars, and the plurality of fixing bars are evenly distributed with the axis of the sample tube as the center; the fixing bars are made of an elastic material; and the lower end of the fixing bar is fixedly connected to the support plate.

[0013] Furthermore, a first fixed block is provided at both ends of the liquid adding plate, and a second fixed block is provided at both ends of the sealing plate; the first driving device includes a pair of horizontally arranged first fixed rods, a pair of horizontal second fixed rods and arranged directly above the first fixed rods, a plurality of connecting rods for connecting the first fixed rods and the second fixed rods, a connecting plate for connecting a pair of second fixed rods, and a second telescopic cylinder vertically arranged and connected to the connecting plate; the cylinder body of the second telescopic cylinder is connected to the shell; a pair of first fixed rods are respectively arranged at both ends of the liquid adding plate and are simultaneously connected to the first fixed block and the second fixed block.

[0014] Furthermore, the second driving device includes a horizontally arranged frame-shaped hanging plate, a pulling plate arranged on the upper side of the hanging plate, a pair of sliding bars arranged on the connecting plate, a motor horizontally arranged at one end of the hanging plate, a screw rod arranged on the output shaft of the motor, and a driving block arranged on the connecting plate; the pulling plate is fixedly connected to the telescopic rod of the second telescopic cylinder, the pair of sliding bars are both slidably connected to the lower side of the hanging plate, the screw rod is threadedly connected to the driving block, and the end of the screw rod away from the motor is rotationally connected to the hanging plate.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: the medical testing agent mixing device of the present invention, when in use, places the sample tube containing the sample to be tested on the support plate, and then places the support plate on the support plate, the liquid supply device sends the detection reagent into the liquid storage tank through the liquid inlet pipe through the pump body, and flows into the liquid storage hole (the capacity of the liquid storage hole is the amount of reagent to be added), and the excess reagent is discharged from the liquid discharge pipe (so that the bottom of the liquid storage tank does not contain the reagent), and then the pressure device injects air into the liquid storage tank through the liquid inlet pipe, and then squeezes the reagent in the liquid storage hole into the sample tube (the lower end of the liquid adding nozzle is a sharp tip, under the action of water tension, if there is no external force, the reagent will not flow out), and completes the batch liquid adding operation of multiple sample tubes. When it is necessary to add other detection reagents at intervals, it is only necessary to splice the liquid adding plates containing different reagents, and then use the first drive device and the second drive device to switch the liquid adding plates, so that the liquid adding plates containing different reagents are aligned with the sample tubes in sequence. This not only makes liquid addition more efficient and more accurate, but also reduces the error rate. When processing different samples and requiring different types and quantities of reagents, the modular liquid addition plate can also be temporarily assembled and can be easily modified according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a drug mixing device for medical testing provided by an embodiment of the present invention; Figure 2 A cross-sectional view along the vertical direction of a drug mixing device for medical testing provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a perspective of the interior of a housing provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of the interior of a housing from two perspectives provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a supporting plate portion provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a second driving device provided by an embodiment of the present invention; Figure 7A schematic structural diagram of a first driving device part provided in an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a liquid adding device provided in an embodiment of the present invention; Fig. 9 A schematic diagram of a partially unfolded structure of a liquid adding device provided in an embodiment of the present invention; Fig.10 A schematic diagram of the structure inside the liquid storage hole provided by an embodiment of the present invention; Fig.11 A schematic structural diagram of a sealing plate portion provided by an embodiment of the present invention; Fig.12 A schematic structural diagram of a rubber block portion provided by an embodiment of the present invention.

[0017] Icons: 11-shell, 12-through hole, 13-storage tank, 21-support plate, 22-support plate, 23-fixing assembly, 231-fixing bar, 24-vibration device, 25-sample tube, 30-liquid adding device, 31-liquid adding plate, 32-liquid storage tank, 33-sealing cover, 34-liquid storage hole, 35-liquid adding nozzle, 36-floating ball, 37-blocking bar, 38-liquid pipette, 39-sliding rod, 310-adjusting plate, 311-first telescopic cylinder, 312-limiting tube, 313-limiting rod, 3 14-liquid inlet pipe, 315-liquid discharge pipe, 316-first fixed block, 317-water retaining strip, 40-sealing device, 41-sealing plate, 42-sealing groove, 43-rubber block, 44-second fixed block, 50-first driving device, 51-first fixed rod, 52-second fixed rod, 53-connecting rod, 54-connecting plate, 55-second telescopic cylinder, 60-second fixing device, 61-hanging plate, 62-motor, 63-screw, 64-pull plate, 65-slide bar, 66-driving block. DETAILED DESCRIPTION

[0018] Example The following is further described in conjunction with specific embodiments. Figure 1 -Attached Fig.12As shown, the medical testing drug mixing device of this embodiment includes a shell 11, a supporting plate 21 arranged at the bottom of the shell 11, a supporting plate 22 placed on the supporting plate 21, a plurality of sample tubes 25 vertically arranged on the supporting plate 22, a plurality of liquid adding devices 30 arranged at the upper end of the shell 11, a first driving device 50 for driving the liquid adding device 30 to move in the vertical direction, and a second driving device for driving the liquid adding device 30 to move in the horizontal direction; the liquid adding device 30 includes a horizontally arranged long strip liquid adding plate 31, a liquid storage tank 32 opened at the upper end of the liquid adding plate 31, a plurality of liquid storage holes 34 opened in the liquid storage tank 32, a liquid adding nozzle 35 arranged at the lower end of the liquid storage hole 34, a sealing cover 33 covered at the upper end of the liquid storage tank 32, a liquid inlet pipe 314 and a liquid discharge pipe 315 respectively connected to the two ends of the liquid storage tank 32, a liquid supply device connected to the liquid inlet pipe 314, and a pressurizing device connected to the liquid inlet pipe 314. Specifically, when in use, the sample tube 25 containing the sample to be tested is placed on the support plate 22, and then the support plate 22 is placed on the support plate 21 after passing through the through hole 12 on the side wall of the shell 11. The liquid supply device uses the pump body to send the detection reagent into the liquid storage tank 32 through the liquid inlet pipe 314, and flows into the liquid storage hole 34 (the capacity of the liquid storage hole 34 is the amount of reagent that needs to be added), and the excess reagent is discharged from the liquid discharge pipe 315 (so that the bottom of the liquid storage tank 32 does not contain reagent), and then the pressurizing device injects air into the liquid storage tank 32 through the liquid inlet pipe 314, and then squeezes the reagent in the liquid storage hole 34 into the sample tube 25 (the lower end of the liquid adding nozzle 35 is a pointed end, and under the action of water tension, if there is no external force, the reagent will not flow out), completing the batch liquid adding operation of multiple sample tubes 25. When other detection reagents need to be added at intervals, it is only necessary to splice the liquid adding plates 31 containing different reagents to each other, and then use the first drive device 50 and the second drive device to switch the liquid adding plates 31 so that the liquid adding plates 31 containing different reagents are aligned with the sample tubes 25 in sequence. In this way, not only is the liquid addition more efficient and more accurate, but also the error rate is lower. When different samples are processed and different types and quantities of reagents are required, the liquid adding plates 31 with modular settings can also be temporarily assembled, which can be easily modified according to actual needs. It should be noted that the reagents are mainly stored in the storage tank 13, and the reagents discharged from the liquid storage tank 32 can be refluxed into the storage tank 13 for reuse.

[0019] The liquid adding nozzle 35 in this embodiment is in a cone shape with a larger top and a smaller bottom. A floating ball 36 is provided in the liquid adding nozzle 35, and the density of the floating ball 36 is less than the density of water. Baffles 37 are provided on both sides of the upper end of the liquid adding nozzle 35, and the gap between the pair of baffles 37 is smaller than the diameter of the floating ball 36. Fig.10As shown, after the liquid storage hole 34 is filled with reagent, the buoyancy of the liquid can float the float 36. When the reagent in the liquid storage hole 34 is discharged through the liquid adding nozzle 35, the float 36 will block the lower end of the liquid adding nozzle 35. The advantage of this is that if the liquid discharge rate of the liquid adding nozzle 35 is uneven, when the reagent in some of the liquid adding nozzles 35 is completely discharged, the gas may be discharged directly from the liquid adding nozzle 35. In this case, the air pressure received by the reagent in other liquid adding nozzles 35 will be significantly reduced, and the reagent may not be squeezed out smoothly. Therefore, the liquid adding nozzle 35 from which the reagent is discharged is first blocked with the float 36 to prevent gas from overflowing from the liquid adding nozzle 35.

[0020] In this embodiment, a liquid suction pipe 38 is disposed on the lower side wall of the liquid adding nozzle 35, and the liquid suction pipe 38 is connected to a negative pressure device; when there is no liquid in the liquid adding nozzle 35, the contact point between the float 36 and the liquid adding nozzle 35 is located below the connection point between the liquid suction pipe 38 and the liquid adding nozzle 35. Fig.10 As shown, since the lower end of the liquid adding nozzle 35 is a very thin tip structure, there may be an air cavity here, that is, under the tension of water and air pressure, the tip of the liquid adding nozzle 35 will not be filled with liquid, and the volume of this part of the cavity and whether the cavity exists are difficult to determine, so the air and part of the reagent at the lower end of the liquid adding nozzle 35 can be sucked away by the pipette 38, so that the reagent can fully fill the entire liquid adding nozzle 35, ensuring that the amount of reagent in each liquid adding nozzle 35 and the liquid storage hole 34 remains relatively constant. The reagent sucked into the negative pressure device can be directly discarded, or its properties can be tested to determine whether to reuse it.

[0021] The sealing cover 33 in this embodiment is provided with a plurality of sliding holes along the length direction, and a sliding rod 39 is provided in the sliding hole for sealing and sliding. The upper ends of the plurality of sliding rods 39 are simultaneously connected to an adjustment plate 310, and a vertically arranged first telescopic cylinder 311 is fixedly provided on the upper side of the adjustment plate 310; the lower end of the sliding rod 39 is arranged in the liquid storage hole 34; the telescopic rod of the first telescopic cylinder 311 is fixedly connected to the upper side of the sealing cover 33. Specifically, as shown in the attached figure, Figure 8-9 As shown, the first telescopic cylinder 311 can drive the adjustment plate 310 to drive the slide bar 39 to move up and down. When the slide bar 39 moves up and down, the volume of the liquid storage hole 34 occupied by it will change, so as to adjust the liquid storage amount of the liquid storage hole 34, and then adjust the amount of reagent added to the sample tube 25.

[0022] In this embodiment, the regulating plate 310 is provided with a plurality of limiting tubes 312, and the upper side of the sealing cover 33 is provided with a plurality of limiting rods 313; the limiting rods 313 pass through the regulating plate 310 and slide in the limiting tubes 312; the bottom of the liquid storage tank 32 is provided with a plurality of annular water retaining strips 317; the water retaining strips 317 are provided at the upper end of the liquid storage hole 34. Specifically, the limiting tubes 312 and the limiting rods 313 are used to ensure that the regulating plate 310 moves vertically up and down. When a large amount of reagent adheres to the bottom of the liquid storage tank 32, the water retaining strips 317 can prevent this part from actually entering the liquid storage hole 34.

[0023] In this embodiment, it also includes a horizontally arranged long strip sealing plate 41, and a plurality of sealing grooves 42 opened on the lower side of the sealing plate 41; the plurality of sealing grooves 42 are interconnected; the liquid adding plates 31 and the sealing plates 41 are alternately arranged in the horizontal direction; the sealing plates 41 are simultaneously connected to the first driving device 50 and the second driving device; the diameter of the sealing groove 42 is larger than the outer diameter of the upper end of the sample tube 25; the support plate 21 is connected to the vibration device 24. A hemispherical hollow rubber block 43 is arranged in the sealing groove 42, and adjacent rubber blocks 43 are interconnected; the rubber block 43 is adhered to the inner wall of the sealing groove 42 by an adhesive. Specifically, as shown in the attached Figure 11-12 As shown, after some reagents are added to the sample tube 25, the sample tube 25 needs to be vibrated to fully mix it. During the vibration, the first starting device and the second driving device drive the sealing plate 41 to move to the top of the sample tube 25, and move downward so that the opening of the sample tube 25 is against the rubber block 43, so that the upper end of the sample tube 25 can also be sealed and fixed by the rubber block 43 during the vibration, so that the upper end of the sample tube 25 is relatively fixed and the lower end is vibrated, so that the liquid in the sample tube 25 is less likely to overflow. The rubber block 43 is a hemispherical hollow structure, so that when the upper end of the sample tube 25 contacts the rubber block 43, the rubber block 43 can better seal the sample tube 25. And because the rubber blocks 43 are connected together, the rubber blocks 43 can be replaced more efficiently.

[0024] In this embodiment, a plurality of fixing components 23 are arranged on the support plate 21, and a sample tube 25 is arranged in one fixing component 23; the fixing component 23 includes a plurality of S-shaped fixing bars 231, and the plurality of fixing bars 231 are evenly distributed with the axis of the sample tube 25 as the center of the circle; the fixing bars 231 are made of elastic material; and the lower end of the fixing bar 231 is fixedly connected to the support plate 21. Specifically, as shown in the attached figure, Figure 5 As shown, the sample tube 25 is supported by the S-shaped fixing bar 231, which can not only support the sample tube 25, but also allow it to vibrate under the action of the vibration device 24, wherein the vibration device 24 is mainly composed of a motor 62, an eccentric wheel, etc.

[0025] In this embodiment, both ends of the liquid adding plate 31 are provided with first fixing blocks 316, and both ends of the sealing plate 41 are provided with second fixing blocks 44; the first driving device 50 includes a pair of first fixing rods 51 arranged horizontally, a pair of second fixing rods 52 arranged horizontally and directly above the first fixing rods 51, a plurality of connecting rods 53 for connecting the first fixing rods 51 and the second fixing rods 52, a connecting plate 54 for connecting a pair of second fixing rods 52, and a second telescopic cylinder 55 arranged vertically and connected to the connecting plate 54; the cylinder body of the second telescopic cylinder 55 is connected to the housing 11; a pair of first fixing rods 51 are respectively arranged at both ends of the liquid adding plate 31 and are simultaneously connected to the first fixing block 316 and the second fixing block 44. Specifically, as shown in the attached figure, Figure 6-7 As shown, the second telescopic cylinder 55 can drive the connecting plate 54, the second fixed rod 52, the connecting rod 53, the first fixed rod 51, the first fixed block 316, the second fixed block 44, the liquid adding plate 31 and the sealing plate 41 to move up and down, so that the liquid adding nozzle 35 (or the sealing groove 42) is close to (or away from) the sample tube 25.

[0026] The second driving device in this embodiment includes a horizontally arranged frame-shaped hanging plate 61, a pulling plate 64 arranged on the upper side of the hanging plate 61, a pair of sliding bars 65 arranged on the connecting plate 54, a motor 62 horizontally arranged at one end of the hanging plate 61, a screw rod 63 arranged on the output shaft of the motor 62, and a driving block 66 arranged on the connecting plate 54; the pulling plate 64 is fixedly connected to the telescopic rod of the second telescopic cylinder 55, the pair of sliding bars 65 are both slidably connected to the lower side of the hanging plate 61, the screw rod 63 is threadedly connected to the driving block 66, and the end of the screw rod 63 away from the motor 62 is rotationally connected to the hanging plate 61. Specifically, on the basis of the first driving device 50, the hanging plate 61, the pulling plate 64 and the second telescopic cylinder 55 are fixedly connected, and the screw 63 is driven to rotate by the motor 62, thereby driving the driving block 66 to reciprocate along the axial direction of the screw 63. Since the driving block 66 is connected to the connecting plate 54, the second fixing rod 52, the connecting rod 53, the first fixing rod 51, etc., the liquid adding plate 31 and the sealing plate 41 can be driven to move in the horizontal direction. It should be noted that the cross section of the slide bar 65 is T-shaped, so that the slide bar 65 can be stuck in the hanging plate 61 and will not fall out.

[0027] In summary, the drug mixing device for medical testing of this embodiment, when in use, places the sample tube 25 containing the sample to be tested on the support plate 22, and then places the support plate 22 on the support plate 21, and the liquid supply device uses the pump body to send the detection reagent into the liquid storage tank 32 through the liquid inlet pipe 314, and flows into the liquid storage hole 34 (the capacity of the liquid storage hole 34 is the amount of reagent that needs to be added), and the excess reagent is discharged from the liquid discharge pipe 315 (so that the bottom of the liquid storage tank 32 does not contain the reagent), and then the pressurizing device injects air into the liquid storage tank 32 through the liquid inlet pipe 314, and then squeezes the reagent in the liquid storage hole 34 into the sample tube 25 (the lower end of the liquid adding nozzle 35 is a pointed end, under the action of water tension, if there is no external force, the reagent will not flow out), completing the batch liquid adding operation of multiple sample tubes 25. When other detection reagents need to be added at intervals, it is only necessary to splice the liquid adding plates 31 containing different reagents, and then use the first driving device 50 and the second driving device to switch the liquid adding plates 31, so that the liquid adding plates 31 containing different reagents are aligned with the sample tubes 25 in sequence. In this way, not only is the liquid addition more efficient and more accurate, but also the error rate is lower. When different samples are processed and different types and quantities of reagents are required, the modular liquid adding plates 31 can also be temporarily assembled, and can be easily modified according to actual needs.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drug mixing device for medical testing, characterized in that: The invention comprises a shell (11), a supporting plate (21) arranged at the bottom of the shell (11), a support plate (22) placed on the supporting plate (21), a plurality of sample tubes (25) vertically arranged on the support plate (22), a plurality of liquid adding devices (30) arranged at the upper end of the shell (11), a first driving device (50) for driving the liquid adding devices (30) to move in a vertical direction, and a second driving device for driving the liquid adding devices (30) to move in a horizontal direction; The liquid adding device (30) comprises a horizontally arranged long strip liquid adding plate (31), a liquid storage tank (32) provided at the upper end of the liquid adding plate (31), a plurality of liquid storage holes (34) provided in the liquid storage tank (32), a liquid adding nozzle (35) provided at the lower end of the liquid storage holes (34), a sealing cover (33) provided at the upper end of the liquid storage tank (32), a liquid inlet pipe (314) and a liquid discharge pipe (315) respectively connected to the two ends of the liquid storage tank (32), a liquid supply device connected to the liquid inlet pipe (314), and a pressurizing device connected to the liquid inlet pipe (314).

2. The medical testing drug mixing device according to claim 1, characterized in that: The liquid adding nozzle (35) is in the shape of a cone with a larger top and a smaller bottom. A floating ball (36) is provided in the liquid adding nozzle (35), and the density of the floating ball (36) is less than the density of water. Baffles (37) are provided on opposite sides of the upper end of the liquid adding nozzle (35), and the gap between a pair of baffles (37) is smaller than the diameter of the floating ball (36).

3. The medical testing drug mixing device according to claim 2, characterized in that: A liquid suction pipe (38) is provided on the side wall of the lower end of the liquid adding nozzle (35), and the liquid suction pipe (38) is connected to a negative pressure device; When there is no liquid in the liquid adding nozzle (35), the contact point between the float (36) and the liquid adding nozzle (35) is located below the connection point between the liquid suction tube (38) and the liquid adding nozzle (35).

4. The medical testing drug mixing device according to claim 1, characterized in that: The sealing cover (33) is provided with a plurality of sliding holes along the length direction, and a sliding rod (39) is provided in the sliding hole for sealing and sliding. The upper ends of the plurality of sliding rods (39) are simultaneously connected to an adjustment plate (310), and a vertically arranged first telescopic cylinder (311) is fixedly provided on the upper side of the adjustment plate (310); The lower end of the sliding rod (39) is arranged in the liquid storage hole (34); the telescopic rod of the first telescopic cylinder (311) is fixedly connected to the upper side of the sealing cover (33).

5. The medical testing drug mixing device according to claim 4, characterized in that: The adjusting plate (310) is provided with a plurality of limiting tubes (312), and the upper side of the sealing cover (33) is provided with a plurality of limiting rods (313); the limiting rods (313) pass through the adjusting plate (310) and are slidably disposed in the limiting tubes (312); A plurality of annular water retaining strips (317) are provided at the bottom of the liquid storage tank (32); the water retaining strips (317) are provided at the upper end of the liquid storage hole (34).

6. The medical testing drug mixing device according to claim 1, characterized in that: It also includes a horizontally arranged long strip sealing plate (41), and a plurality of sealing grooves (42) opened on the lower side of the sealing plate (41); The plurality of sealing grooves (42) are interconnected; the liquid adding plates (31) and the sealing plates (41) are arranged alternately in the horizontal direction; the sealing plates (41) are simultaneously connected to the first driving device (50) and the second driving device; The diameter of the sealing groove (42) is larger than the outer diameter of the upper end of the sample tube (25); and the supporting plate (21) is connected to a vibration device (24).

7. The medical testing drug mixing device according to claim 6, characterized in that: A hemispherical hollow rubber block (43) is arranged in the sealing groove (42), and adjacent rubber blocks (43) are connected to each other; the rubber blocks (43) are adhered to the inner wall of the sealing groove (42) by adhesive.

8. The medical testing drug mixing device according to claim 7, characterized in that: A plurality of fixing components (23) are arranged on the supporting plate (21), and one of the sample tubes (25) is arranged in one of the fixing components (23); The fixing assembly (23) comprises a plurality of S-shaped fixing bars (231), and the plurality of fixing bars (231) are evenly distributed with the axis of the sample tube (25) as the center of the circle; the fixing bars (231) are made of an elastic material; and the lower ends of the fixing bars (231) are fixedly connected to the supporting plate (21).

9. The medical testing drug mixing device according to claim 6, characterized in that: Both ends of the liquid adding plate (31) are provided with a first fixing block (316), and both ends of the sealing plate (41) are provided with a second fixing block (44); The first driving device (50) comprises a pair of first fixing rods (51) arranged horizontally, a pair of second fixing rods (52) arranged horizontally and directly above the first fixing rods (51), a plurality of connecting rods (53) for connecting the first fixing rods (51) and the second fixing rods (52), a connecting plate (54) for connecting a pair of the second fixing rods (52), and a second telescopic cylinder (55) arranged vertically and connected to the connecting plate (54); a cylinder body of the second telescopic cylinder (55) is connected to the housing (11); A pair of the first fixing rods (51) are respectively arranged at two ends of the liquid adding plate (31) and are simultaneously connected to the first fixing block (316) and the second fixing block (44).

10. The medical testing drug mixing device according to claim 9, characterized in that: The second driving device comprises a horizontally arranged frame-shaped hanging plate (61), a pulling plate (64) arranged on the upper side of the hanging plate (61), a pair of sliding bars (65) arranged on the connecting plate (54), a motor (62) horizontally arranged at one end of the hanging plate (61), a screw rod (63) arranged on the output shaft of the motor (62), and a driving block (66) arranged on the connecting plate (54); The pulling plate (64) is fixedly connected to the telescopic rod of the second telescopic cylinder (55), a pair of the sliding bars (65) are both slidably connected to the lower side of the hanging plate (61), the screw rod (63) is threadedly connected to the driving block (66), and one end of the screw rod (63) away from the motor (62) is rotationally connected to the hanging plate (61).

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