Blood coagulation reagent pipettor

Abstract

The invention discloses a blood coagulation reagent pipettor in the technical field of pipettes, and the blood coagulation reagent pipettor comprises a main mounting shell and a digital display assembly, a liquid taking and discharging assembly, a pressing adjusting assembly and a moving-out assembly are arranged in the main mounting shell, and the liquid taking and discharging assembly is provided with two-stage pressing through a first spring and a second spring; the first spring can contract when the liquid taking and discharging assembly is pressed in the first stage, the second spring can contract when the liquid taking and discharging assembly is pressed in the second stage, multiple sets of supporting plates are movably arranged on the periphery, corresponding to the first spring, in the main mounting shell, the supporting plates surround the first spring, and semicircular grooves are formed in the sides, close to the first spring, of the supporting plates. The semi-circular grooves can be clamped to the outer surface of the first spring, an adjusting assembly is arranged in the main mounting shell and can control the supporting plate to be away from or close to the surface of the first spring, the supporting plate is supported on the outer side of the first spring in a surrounding mode, so that the stability of the first spring is improved, and the conditions that the spring deforms and shifts after being used for a long time are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pipettes, and specifically to a coagulation reagent pipette. Background Art

[0002] A pipette, also called a pipetting gun, is a metering tool that transfers liquid from an original container to another container within a certain measuring range.

[0003] After long-term use, a pipette is prone to problems such as non-return of pressing or inaccurate liquid suction volume. This is mostly caused by the spring inside the pipette rusting, deforming, or shifting after long-term use. It is difficult for the spring to maintain stability for a long time. Even if there are no problems such as rusting and shifting, the elasticity of the spring itself will gradually deteriorate after long-term use. After pressing, the spring cannot fully reset the piston rod, resulting in inaccurate reagent suction. Summary of the Invention

[0004] The technical problem of the present invention is to provide a coagulation reagent pipette, which can surround and support the first spring with a support plate to increase the stability of the first spring and avoid deformation and displacement of the spring during long-term use.

[0005] To achieve the above object, the present invention provides the following technical solution: A coagulation reagent pipette includes a main installation shell and a digital display component. A liquid taking and discharging component, a pressing and adjusting component, and a moving out component are arranged inside the main installation shell. The liquid taking and discharging component has two-stage pressing through a first spring and a second spring. When the liquid taking and discharging component is pressed at the first stage, the first spring can be contracted. When it is pressed at the second stage, the second spring can be contracted. A plurality of groups of support plates are movably arranged around the first spring inside the main installation shell. The support plates are arranged around the first spring and a semi-circular groove is arranged on the side close to the first spring. The semi-circular groove can be clamped on the outer surface of the first spring. An adjusting component is arranged inside the main installation shell. The adjusting component can control the support plates to move away from and close to the surface of the first spring. When the adjusting component drives the support plates to close to the first spring, the gas inside the main installation shell can be pumped out.

[0006] As a further solution of the present invention, the liquid taking and discharging component includes a liquid taking nozzle and an introducing rod. The liquid taking nozzle is fixedly installed at the lower end of the main installation shell. A sealing plug is fixedly installed at the upper end of the liquid taking nozzle. A piston rod is movably arranged inside the sealing plug. The upper end of the piston rod extends above the sealing plug and is fixedly installed with a fixing block. The first spring is located between the fixing block and the sealing plug and is sleeved outside the piston rod. The introducing rod is slidably connected to the upper end of the main installation shell. An upper movable part is arranged at one end of the introducing rod inside the main installation shell. The second spring is sleeved outside the upper movable part. A limiting ring is fixedly installed at the upper end of the main installation shell. The lower end of the second spring is fixedly connected to the upper surface of the limiting ring.

[0007] As a further solution of the present invention, the pressing and adjusting assembly includes a connecting seat and a lower movable member. The connecting seat is arranged below the limiting ring. A threaded rod is fixedly installed on the connecting seat. The upper end of the threaded rod passes through the limiting ring and is fixedly connected to the lower end of the guiding rod. The lower movable member sleeves the upper end of the piston rod, and the lower end of the threaded rod is threadedly connected to the upper end of the lower movable member.

[0008] As a further solution of the present invention, the removing assembly includes a side mounting shell. The side mounting shell is arranged on one side of the main mounting shell. A discharging rod is slidably connected between the side mounting shell and the main mounting shell. A limiting spring is arranged between the discharging rod and the side mounting shell. The lower end of the discharging rod passes through the sealing plug and extends below the main mounting shell. A discharging sleeve is fixedly installed at the lower end of the discharging rod, and the discharging sleeve sleeves the outside of the liquid taking nozzle.

[0009] As a further solution of the present invention, the digital display assembly is arranged outside the lower movable member. The digital display assembly is composed of a digital wheel set and a transmission gear set. A digital display frame is opened on the main mounting shell corresponding to the position of the digital wheel set. An adjusting knob is fixedly installed at the upper end of the guiding rod. The rotation of the adjusting knob can drive the digital wheel set to rotate through the transmission gear set. A holding handle is fixedly installed on one side of the upper end of the main mounting shell away from the discharging rod.

[0010] As a further solution of the present invention, the adjusting assembly includes a vertical adjusting member and a horizontal adjusting member. A nitrogen tank is fixedly installed outside the main mounting shell. An upper control button and a lower control button are arranged outside the nitrogen tank. An inlet pipe is fixedly installed at the lower end of the nitrogen tank, and the lower end of the inlet pipe extends into the main mounting shell. The upper control button can control the vertical adjusting member, and the lower control button can control the horizontal adjusting member.

[0011] As a further solution of the present invention, the vertical adjusting member includes an upper connecting ring. The upper connecting ring is fixedly installed at the upper end of the lower movable member. A plurality of negative pressure grooves are arranged on the circumference of the lower movable member. The upper end of the negative pressure groove is communicated with the upper connecting ring. A vertical rod is slidably connected to the lower end of the negative pressure groove. An upper suction pump is fixedly installed on one side of the upper connecting ring, and the upper suction pump is communicated with the nitrogen tank through an upper connecting pipe.

[0012] As a further solution of the present invention, the lateral adjusting member includes a movable seat fixedly installed at the lower end of the vertical rod. A cross bar is slidably connected inside the movable seat. One end of the cross bar in the movable seat is fixedly connected to the support plate. A lower connecting ring is arranged between multiple groups of the movable seats. A curved pipe is fixedly connected to the lower connecting ring. The upper end of the curved pipe is led out from the upper end of the lower movable member and fixedly installed with a lower suction pump. The lower suction pump is fixedly connected to the nitrogen tank through a lower connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. When not in use, the support plate surrounds and supports the outside of the first spring, which can ensure that the first spring remains vertical, avoid bending and dislocation of the first spring. The edges of the first spring are all embedded in the semi-circular grooves of the support plate. Through the semi-circular grooves, the vertical distance between adjacent points of the first spring in the natural state is always the distance between adjacent semi-circular grooves, so as to ensure the stability of the spiral angle of the first spring, ensure the elasticity of the first spring, and thus use the support plate as the edge support and limit of the first spring, reduce the possibility of dislocation and deformation of the first spring, increase the maintenance time of the elasticity of the first spring, and enable the pipette to maintain accuracy for a long time.

[0015] 2. When the pipette needs to be used, the support plate moves away from the first spring under the action of the adjusting assembly, and nitrogen is filled into the main installation shell, so that the equipment in the main installation shell is in a nitrogen environment, reducing the possibility of corrosion of the parts in the main installation shell, and at the same time reducing the possibility of rusting of the first spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural sectional view of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 4 For the present invention Figure 3 It is a partial schematic diagram of the structure at A in the present invention;

[0021] Figure 5 For the present invention Figure 3Partial structural schematic diagram at position B in [the device];

[0022] Figure 6 Internal structural schematic diagram of the moving part in the idle state of the present invention;

[0023] Figure 7 For the present invention Figure 6 Partial structural schematic diagram at position C in [the device];

[0024] Figure 8 For the present invention Figure 6 Partial structural schematic diagram at position D in [the device];

[0025] Figure 9 Cross-sectional view of the structure of the moving part of the present invention;

[0026] Figure 10 For the present invention Figure 9 Partial structural schematic diagram at position E in [the device];

[0027] Figure 11 Internal structural schematic diagram of the moving part in the working state of the present invention;

[0028] Figure 12 For the present invention Figure 11 Partial structural schematic diagram at position F in [the device].

[0029] In the drawings: 1, main installation shell; 101, digital display frame; 2, side installation shell; 3, discharge rod; 301, discharge sleeve; 4, holding handle; 5, liquid extraction nozzle; 6, adjustment knob; 7, introduction rod; 8, nitrogen tank; 9, upper control knob; 10, lower control knob; 11, introduction pipe; 12, sealing plug; 13, digital display component; 14, lower moving part; 15, upper moving part; 16, second spring; 17, limiting ring; 18, connecting seat; 19, threaded rod; 20, lower connecting pipe; 21, upper connecting pipe; 22, support plate; 23, piston rod; 24, first spring; 25, upper communication ring; 26, upper suction pump; 27, lower suction pump; 28, negative pressure groove; 29, curved pipe; 30, vertical rod; 31, moving seat; 32, lower communication ring; 33, cross bar; 34, fixed block. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention 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 invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] Please refer to Figures 1 - 12, the present invention provides a technical solution: a coagulation reagent pipette, including a main mounting shell 1 and a digital display component 13. A liquid taking and discharging component, a pressing and adjusting component, and a moving out component are arranged in the main mounting shell 1. The liquid taking and discharging component is provided with two-stage pressing through a first spring 24 and a second spring 16. When the liquid taking and discharging component is pressed at the first stage, the first spring 24 can be contracted. When it is pressed at the second stage, the second spring 16 can be contracted. A plurality of groups of support plates 22 are movably arranged around the first spring 24 in the main mounting shell 1. The support plates 22 are arranged around the first spring 24 and a semi-circular groove is arranged on one side close to the first spring 24. The semi-circular groove can be clamped on the outer surface of the first spring 24. An adjusting component is arranged in the main mounting shell 1. The adjusting component can control the support plates 22 to move away from and close to the surface of the first spring 24. When the adjusting component drives the support plates 22 to approach the first spring 24, the gas in the main mounting shell 1 can be pumped out.

[0032] During operation, when the present invention is not in use, the support plates 22 surround and support the outside of the first spring 24, which can ensure that the first spring 24 remains vertical, avoid bending and dislocation of the first spring 24. The edges of the first spring 24 are all embedded in the semi-circular grooves of the support plates 22. Through the semi-circular grooves, the vertical distance between adjacent points of the first spring 24 in the natural state is always the distance between adjacent semi-circular grooves, so as to ensure that the spiral angle of the first spring 24 remains stable, ensure the elasticity of the first spring 24. Thus, as the edge support and limit of the first spring 24 by the support plates 22, the possibility of dislocation and deformation of the first spring 24 is reduced, and the elastic maintenance time of the first spring 24 is increased, so that the pipette can maintain accuracy for a long time. When the pipette needs to be used, the support plates 22 move away from the first spring 24 under the action of the adjusting component, and nitrogen is filled into the main mounting shell 1, so that the equipment in the main mounting shell 1 is in a nitrogen environment, reducing the possibility of corrosion of the parts in the main mounting shell 1 and at the same time reducing the possibility of rusting of the first spring 24.

[0033] As a further solution of the present invention, the liquid taking and discharging component includes a liquid taking nozzle 5 and a guiding rod 7. The liquid taking nozzle 5 is fixedly installed at the lower end of the main mounting shell 1. A sealing plug 12 is fixedly installed at the upper end of the liquid taking nozzle 5. A piston rod 23 is movably arranged in the sealing plug 12. The upper end of the piston rod 23 extends above the sealing plug 12 and is fixedly installed with a fixed block 34. The first spring 24 is located between the fixed block 34 and the sealing plug 12 and is sleeved outside the piston rod 23. The guiding rod 7 is slidably connected to the upper end of the main mounting shell 1. An upper movable part 15 is arranged at one end of the guiding rod 7 in the main mounting shell 1. The second spring 16 is sleeved outside the upper movable part 15. A limiting ring 17 is fixedly installed at the upper end of the main mounting shell 1. The lower end of the second spring 16 is fixedly connected to the upper surface of the limiting ring 17.

[0034] During operation, when the present invention moves the support plate 22 to perform pipetting, the pipette tip is fixed below the liquid intake nozzle 5. When the user initially presses the introduction rod 7 at the first level, the first spring 24 with a lower elastic coefficient contracts, causing the piston rod 23 to move downward. Then, the pipette tip is placed inside the liquid to be transferred. When the user releases the introduction rod 7, the piston rod 23 automatically moves upward under the action of the first spring 24, thereby sucking the liquid into the pipette tip. Then, after moving the device above the new container, the user presses at the first level again. The first-level pressing causes the first spring 24 to contract, and then a second-level pressing is performed, causing the second spring 16 to contract. Through the second spring 16, the piston rod 23 further moves downward, so that the liquid in the pipette tip is discharged into the container.

[0035] As a further aspect of the present invention, the pressing adjustment assembly includes a connecting seat 18 and a lower movable member 14. The connecting seat 18 is disposed below the limiting ring 17. A threaded rod 19 is fixedly installed on the connecting seat 18. The upper end of the threaded rod 19 passes through the limiting ring 17 and is fixedly connected to the lower end of the introduction rod 7. The upper end of the piston rod 23 is sleeved with the lower movable member 14, and the lower end of the threaded rod 19 is threadedly connected to the upper end of the lower movable member 14.

[0036] During operation, in the present invention, the amount of liquid sucked can be controlled by controlling the downward movement amount of the first-level pressing of the piston rod 23. In actual operation, the user can adjust the suction amount by rotating the introduction rod 7. When the introduction rod 7 rotates, it drives the threaded rod 19 to rotate. The rotation of the threaded rod 19 interacts with the lower movable member 14, thereby adjusting the distance between the lower end of the threaded rod 19 and the lower movable member 14, and further adjusting the distance between the lower end of the lower movable member 14 and the sealing plug 12, so as to complete the adjustment of the downward movement amount of the first-level pressing piston rod 23.

[0037] As a further aspect of the present invention, the removal assembly includes a side mounting shell 2. The side mounting shell 2 is disposed on one side of the main mounting shell 1. A discharge rod 3 is slidably connected between the side mounting shell 2 and the main mounting shell 1. A limiting spring is provided between the discharge rod 3 and the side mounting shell 2. The lower end of the discharge rod 3 passes through the sealing plug 12 and extends below the main mounting shell 1. A discharge sleeve 301 is fixedly installed at the lower end of the discharge rod 3, and the discharge sleeve 301 is sleeved outside the liquid intake nozzle 5.

[0038] During operation, after the pipetting of the present invention is completed, the pipette tip can be removed by pressing the discharge rod 3. The downward movement of the discharge rod 3 drives the discharge sleeve 301 to move downward, and the pipette tip on the liquid intake nozzle 5 is automatically detached through the downward movement of the discharge sleeve 301.

[0039] As a further solution of the present invention, the digital display component 13 is arranged outside the lower movable part 14. The digital display component 13 is composed of a digital wheel group and a transmission gear group. A digital display frame 101 is provided on the main installation shell 1 corresponding to the position of the digital wheel group. The upper end of the guiding rod 7 is fixedly installed with an adjusting knob 6. The rotation of the adjusting knob 6 can drive the rotation of the digital wheel group through the transmission gear group. On the upper end of the main installation shell 1, a holding handle 4 is fixedly installed on the side far from the discharging rod 3.

[0040] During operation, in the present invention, the rotation of the adjusting knob 6 drives the rotation of the guiding rod 7, and the rotation of the adjusting knob 6 drives the rotation of the digital wheel group through the transmission gear group. Users can observe the amount of liquid to be obtained through different numbers on the digital wheel group on the digital display frame 101.

[0041] As a further solution of the present invention, the adjusting component includes a vertical adjusting part and a horizontal adjusting part. A nitrogen tank 8 is fixedly installed outside the main installation shell 1. An upper control button 9 and a lower control button 10 are arranged on the outside of the nitrogen tank 8. The lower end of the nitrogen tank 8 is fixedly installed with an inlet pipe 11. The lower end of the inlet pipe 11 extends into the main installation shell 1. The upper control button 9 can control the vertical adjusting part, and the lower control button 10 can control the horizontal adjusting part.

[0042] During operation, in the present invention, nitrogen circulates between the nitrogen tank 8 and the main installation shell 1. When the user presses the upper control button 9, the nitrogen in the vertical adjusting part flows into the main installation shell 1 through the nitrogen tank 8 and the inlet pipe 11. When the user presses the lower control button 10, the nitrogen in the horizontal adjusting part flows into the main installation shell 1 through the nitrogen tank 8 and the inlet pipe 11.

[0043] The vertical adjusting part includes an upper connecting ring 25. The upper connecting ring 25 is fixedly installed at the upper end of the lower movable part 14. Multiple negative pressure grooves 28 are arranged on the circumference of the lower movable part 14. The upper end of the negative pressure groove 28 is communicated with the upper connecting ring 25. The lower end of the negative pressure groove 28 is slidably connected with a vertical rod 30. One side of the upper connecting ring 25 is fixedly installed with an upper suction pump 26. The upper suction pump 26 is communicated with the nitrogen tank 8 through an upper connecting pipe 21.

[0044] During operation, in the present invention, the upper suction pump 26 can drive in two directions. When the upper control button 9 is released, under the action of the upper suction pump 26, nitrogen enters the upper connecting ring 25 from the main installation shell 1 through the inlet pipe 11 and the nitrogen tank 8, so that nitrogen enters the negative pressure groove 28. The vertical rod 30 is pushed down to the bottom of the negative pressure groove 28 by the extrusion of nitrogen. When the upper control button 9 is pressed, nitrogen flows reversely into the main installation shell 1 from the negative pressure groove 28 and the upper connecting ring 25 under the action of the upper suction pump 26, and the vertical rod 30 moves up to the upper end of the negative pressure groove 28 under the action of suction.

[0045] The horizontal adjustment member includes a movable seat 31, which is fixedly installed at the lower end of the vertical rod 30. A cross bar 33 is slidably connected in the movable seat 31. One end of the cross bar 33 in the movable seat 31 is fixedly connected to the support plate 22. A lower connecting ring 32 is arranged between multiple movable seats 31. A curved pipe 29 is fixedly connected to the lower connecting ring 32. The upper end of the curved pipe 29 is led out from the upper end of the lower movable member 14 and a lower suction pump 27 is fixedly installed. The lower suction pump 27 is fixedly connected to the nitrogen tank 8 through a lower connecting pipe 20.

[0046] During operation, the lower suction pump 27 in the present invention can be driven bidirectionally. When the lower control button 10 is released, under the action of the lower suction pump 27, nitrogen enters the lower connecting ring 32 from the main installation shell 1 through the inlet pipe 11, the nitrogen tank 8 and the curved pipe 29, and then enters the movable seat 31 through the lower connecting ring 32, so that the cross bar 33 in the movable seat 31 is led out, and the support plate 22 is away from the movable seat 31 and adheres to the surface of the first spring 24. When the lower control button 10 is pressed, the nitrogen flows in the reverse direction, so that it is withdrawn from the movable seat 31, and thus the cross bar 33 and the support plate 22 approach the movable seat 31 under the suction force.

Claims

1. A coagulation reagent pipette, comprising a main mounting shell (1) and a digital display assembly (13), characterized in that: The main installation shell (1) is provided with a liquid taking and discharging component, a pressing and adjusting component and a removing component. The liquid taking and discharging component is provided with two-stage pressing by means of a first spring (24) and a second spring (16). When the liquid taking and discharging component is pressed at the first stage, the first spring (24) can be contracted, and when the liquid taking and discharging component is pressed at the second stage, the second spring (16) can be contracted. A plurality of groups of support plates (22) are provided in the main installation shell (1) corresponding to the peripheral movement of the first spring (24). The support plate (22) is arranged around the first spring (24) and a semicircular groove is provided on a side close to the first spring (24). The semicircular groove can be clamped on the outer surface of the first spring (24). The main installation shell (1) is provided with an adjusting component. The adjusting component can control the support plate (22) to be away from and close to the surface of the first spring (24). When the adjusting component drives the support plate (22) to be close to the first spring (24), the gas in the main installation shell (1) can be extracted.

2. A coagulation reagent pipette according to claim 1, characterized in that: The liquid taking and discharging assembly comprises a liquid taking nozzle (5) and an introduction rod (7); the liquid taking nozzle (5) is fixedly mounted on the lower end of the main mounting shell (1); a sealing plug (12) is fixedly mounted on the upper end of the liquid taking nozzle (5); a piston rod (23) is movably arranged in the sealing plug (12); the upper end of the piston rod (23) extends above the sealing plug (12) and is fixedly mounted with a fixing block (34); the first spring (24) is located between the fixing block (34) and the sealing plug. The guide rod (7) is slidably connected to the upper end of the main mounting shell (1); an upper movable part (15) is provided at one end of the guide rod (7) located at the main mounting shell (1); the second spring (16) is sleeved outside the upper movable part (15); a limiting ring (17) is fixedly installed at the upper end of the main mounting shell (1); and the lower end of the second spring (16) is fixedly connected to the upper surface of the limiting ring (17).

3. A coagulation reagent pipette according to claim 2, characterized in that: The press adjustment assembly comprises a connecting seat (18) and a lower movable member (14); the connecting seat (18) is arranged below the limiting ring (17); a threaded rod (19) is fixedly mounted on the connecting seat (18); the upper end of the threaded rod (19) passes through the limiting ring (17) and is fixedly connected to the lower end of the introduction rod (7); the lower movable member (14) is sleeved on the upper end of the piston rod (23); and the lower end of the threaded rod (19) is threadedly connected to the upper end of the lower movable member (14).

4. A coagulation reagent pipette according to claim 3, characterized in that: The removal assembly comprises a side mounting shell (2), wherein the side mounting shell (2) is arranged on one side of the main mounting shell (1), a discharge rod (3) is slidably connected between the side mounting shell (2) and the main mounting shell (1), a limit spring is arranged between the discharge rod (3) and the side mounting shell (2), the lower end of the discharge rod (3) passes through the sealing plug (12) and extends to the bottom of the main mounting shell (1), and a discharge sleeve (301) is fixedly installed on the lower end of the discharge rod (3), and the discharge sleeve (301) is sleeved on the outer side of the liquid collection nozzle (5).

5. A coagulation reagent pipette according to claim 4, characterized in that: The digital display assembly (13) is arranged on the outside of the lower movable part (14), and the digital display assembly (13) is composed of a digital wheel group and a transmission gear group. A digital display frame (101) is provided on the main installation shell (1) at a position corresponding to the digital wheel group. An adjusting button (6) is fixedly installed on the upper end of the introduction rod (7). The rotation of the adjusting button (6) can drive the digital wheel group to rotate through the transmission gear group. A holding handle (4) is fixedly installed on the side of the upper end of the main installation shell (1) away from the discharge rod (3).

6. A coagulation reagent pipette according to claim 5, characterized in that: The adjustment assembly comprises a vertical adjustment member and a horizontal adjustment member. A nitrogen tank (8) is fixedly mounted on the outside of the main installation shell (1). An upper control button (9) and a lower control button (10) are arranged on the outside of the nitrogen tank (8). An introduction pipe (11) is fixedly mounted on the lower end of the nitrogen tank (8). The lower end of the introduction pipe (11) extends into the main installation shell (1). The upper control button (9) can control the vertical adjustment member, and the lower control button (10) can control the horizontal adjustment member.

7. A coagulation reagent pipette according to claim 6, characterized in that: The vertical adjustment member comprises an upper connecting ring (25), the upper connecting ring (25) being fixedly mounted on the upper end of the lower movable member (14), a plurality of groups of negative pressure grooves (28) being arranged on the circumference of the lower movable member (14), the upper ends of the negative pressure grooves (28) being connected to the upper connecting ring (25), the lower ends of the negative pressure grooves (28) being slidably connected to a vertical rod (30), an upper suction pump (26) being fixedly mounted on one side of the upper connecting ring (25), the upper suction pump (26) being connected to the nitrogen tank (8) via an upper connecting pipe (21).

8. A coagulation reagent pipette according to claim 7, characterized in that: The transverse adjustment member comprises a movable seat (31), the movable seat (31) is fixedly mounted on the lower end of the vertical rod (30), a cross bar (33) is slidably connected inside the movable seat (31), the cross bar (33) is located at one end of the movable seat (31) and is fixedly connected to the support plate (22), a lower connecting ring (32) is arranged between the plurality of groups of movable seats (31), a curved pipe (29) is fixedly connected to the lower connecting ring (32), the upper end of the curved pipe (29) is led out from the upper end of the lower movable member (14) and a lower suction pump (27) is fixedly mounted thereon, and the lower suction pump (27) is fixedly connected to the nitrogen tank (8) via a lower connecting pipe (20).

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