Pipetting mechanism and detection equipment

Abstract

The utility model discloses a pipetting mechanism and detection equipment, wherein the pipetting mechanism comprises a pipette, the upper end of the pipette is connected with an adapter block, the adapter block comprises a suction hole communicated with a pipette hole of the pipette, an injection rod is arranged in the suction hole, the injection rod is connected with an adapter frame, and the adapter frame is connected with the pipette. The adapter frame is connected with a driver which drives the adapter frame to reciprocate in the axial direction of the pipette and is connected to the adapter block, and a sleeve arranged on the periphery of the pipette in a sleeving mode is arranged on the adapter frame. According to the pipetting structure disclosed by the utility model, an additional limiting plate does not need to be arranged, and the suction nozzle on the pipette can be separated from the pipette by downwards moving the sleeve arranged on the periphery of the suction nozzle relative to the pipette, so that the pipette does not need to be moved to the limiting plate in the use process, the suction nozzle can be separated at any position, the efficiency is higher, the control is more flexible, and the pipetting structure is convenient to use. And meanwhile, the requirement that the separated suction nozzle is temporarily stored at a fixed position can be met.

Description

Technical Field

[0001] The utility model relates to the field of medical testing equipment, in particular to a liquid transfer mechanism and a testing equipment. Background Art

[0002] In immunoassay equipment, a pipetting mechanism is required to pipette various solutions and samples.

[0003] In order to avoid interference when testing different samples, the pipetting mechanism needs to replace the pipette tip after pipetting one sample before pipetting another sample.

[0004] The utility model patent with the authorization announcement number CN214794849U discloses a structure for automatically replacing a suction nozzle, which is to set a limit plate, open a feeding hole on the limit plate, and realize the separation of the suction nozzle and the suction nozzle connecting tube by moving the liquid transfer mechanism to cooperate with the limit plate.

[0005] This structure increases the process steps, reduces the operation efficiency, and cannot temporarily store the withdrawn suction nozzle at a fixed position for reuse. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a liquid transfer mechanism and a detection device.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] The pipetting mechanism includes a pipette, the upper end of which is connected to a transfer block, the transfer block includes a suction hole connected to the suction hole of the pipette, an injection rod is provided in the suction hole, the injection rod is connected to a transfer frame, the transfer frame is connected to a driver that drives it to reciprocate along the axial direction of the pipette and is connected to the transfer block, and the transfer frame is provided with a sleeve that is sleeved on the outer periphery of the pipette.

[0009] Preferably, in the pipetting mechanism, the lower end of the pipette is an inverted frustum.

[0010] Preferably, in the pipetting mechanism, at least one first sealing ring is sleeved on the inverted truncated table.

[0011] Preferably, in the pipetting mechanism, the upper end of the suction hole includes a first step surface and a second step surface distributed up and down, a guide sleeve mounted on the outer circumference of the injection rod is fixed to the first step surface, and a second sealing ring sealingly mounted on the outer circumference of the injection rod is provided on the second step surface.

[0012] Preferably, in the pipetting mechanism, the adapter block is provided with an auxiliary air hole extending radially along the suction hole and connected with the suction hole, the auxiliary air hole is located at the lower end of the adapter block, and a one-way valve is sealed at the auxiliary air hole.

[0013] Preferably, in the pipetting mechanism, the driver is a linear motor.

[0014] Preferably, in the pipetting mechanism, the adapter block is provided with a roller located below the linear motor and in contact with the inner side of the vertical plate of the adapter frame.

[0015] Preferably, in the pipetting mechanism, the adapter block is slidably disposed on a first guide rail, the guide rail extends along the axial direction of the pipette, and the adapter block is connected to a first driving mechanism that drives it to reciprocate along the guide rail.

[0016] Preferably, in the pipetting mechanism, the bracket on which the guide rail and the first driving mechanism are located is movably arranged on a second guide rail, the second guide rail extends horizontally, and the bracket is connected to a second driving mechanism that drives it to move along the second guide rail.

[0017] A detection setting includes any pipetting structure as described above.

[0018] The advantages of the technical solution of the utility model are mainly reflected in:

[0019] The pipetting structure of the utility model does not need to set up an additional limiting plate. The suction nozzle on the pipette can be separated from the pipette by moving the sleeve arranged on the outer circumference thereof downward relative to the pipette. Therefore, during use, there is no need to move the pipette to the limiting plate. The suction nozzle can be separated at any position, which is more efficient and more flexible to control. At the same time, it can meet the requirement of temporarily storing the separated suction nozzle in a fixed position.

[0020] The utility model makes the lower end of the liquid pipette into an inverted rounded table, so that it can be conveniently inserted into the suction nozzle, and at the same time, a sealing ring is sleeved at the inverted rounded table, which can effectively ensure the sealing between the liquid pipette and the suction nozzle, thereby ensuring stable liquid suction.

[0021] The injection rod of the utility model is guided by the guide sleeve and sealed by the second sealing ring, which can effectively prevent the shaking of the injection rod from affecting the stability of the adapter frame.

[0022] The utility model is provided with rollers which can effectively support the transfer frame, thereby ensuring the stability of the transfer frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a first cross-sectional view of a local structure of the liquid transfer machine of the utility model;

[0024] Figure 2 It is a second cross-sectional view of the liquid transfer machine of the utility model;

[0025] Figure 3 It is a three-dimensional diagram of the liquid transfer machine of the present utility model. DETAILED DESCRIPTION

[0026] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0027] In the description of the scheme, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] The liquid transfer mechanism disclosed by the utility model is described below in conjunction with the accompanying drawings. Figure 1 As shown, it includes a pipette 100, the upper end of which is connected to a transfer block 200, the transfer block 200 includes a suction hole 210 connected to the suction hole 110 of the pipette 100, an injection rod 300 is provided in the suction hole 210, the injection rod 300 is connected to a transfer frame 400, the transfer frame 400 is connected to a driver 500 that drives it to reciprocate along the axial direction of the pipette 100 and is connected to the transfer block 200, and the transfer frame 400 is provided with a sleeve 600 that is sleeved on the outer periphery of the pipette 100.

[0029] As attached Figure 1 As shown, in order to facilitate the connection of the suction nozzle, the lower end of the pipette 100 is an inverted cone 120, so that the inverted cone 120 can be smoothly inserted into the suction nozzle. In order to ensure that the pipette 100 is sealed and connected to the suction nozzle for suction, at least one first sealing ring 130 is sleeved on the inverted cone 120. Preferably, there are two first sealing rings 130. The suction hole at the center of the pipette 100 includes a first hole segment and a second hole segment. The diameter of the first hole segment is smaller than the diameter of the second hole segment, and the first hole segment is located at the inverted cone 120. The aperture of the second hole segment is smaller than half of the outer diameter of the pipette 100.

[0030] As attached Figure 1As shown, the upper end of the pipette 100 is plugged into the plug-in section at the lower part of the suction hole 210. At the same time, the top of the pipette 100 and the plug-in section are sealed and connected by a sealing ring. A connecting plate 140 is formed at the tube wall of the pipette 100, and the connecting plate 140 is fixed to the bottom of the adapter block 200 by screws. The suction hole 210 also includes a connecting section that is concentric and connected to the plug-in section. The diameter of the connecting section is smaller than the diameter of the plug-in section. The upper end of the connecting section is concentrically connected to the rod telescopic section. The diameter of the rod telescopic section is larger than the diameter of the connecting section. The injection rod 300 can be reciprocated along the rod telescopic section and is arranged in the rod telescopic section. At the same time, the lower end of the injection rod 300 can be sealed and connected to the hole wall of the rod telescopic section through a sealing ring. More preferably, in order to prevent the upper end of the injection rod 300 from swinging, the upper end of the suction hole includes a first step surface and a second step surface distributed up and down, a guide sleeve 700 sleeved on the outer periphery of the injection rod 300 is fixed on the first step surface, and a second sealing ring 800 sealingly sleeved on the outer periphery of the injection rod 300 is provided on the second step surface. Thus, the guide sleeve 700 can effectively limit the injection rod 300.

[0031] As attached Figure 2 As shown, the adapter block 200 is provided with an auxiliary air hole 220 extending radially along the suction hole and connected with the suction hole, the auxiliary air hole 220 is located at the lower end of the adapter block 200, and a one-way valve 900 is sealed at the auxiliary air hole 220. The one-way valve 900 allows the gas to be sucked from the pipette 100 and the adapter block 200 to the outside.

[0032] As attached Figure 1 As shown, the adapter frame 400 is C-shaped and its upper end plate 410 is connected to the top of the injection rod 300. The lower end plate 420 of the adapter frame 400 is provided with a through hole for the pipette 100 to pass through, and the sleeve 600 is fixed at the through hole. The sleeve 600 is sleeved on the outer periphery of the pipette 100.

[0033] As attached Figure 1As shown, the driver 500 is located between the adapter block 200 and the adapter frame 400, which can be a known cylinder, hydraulic cylinder, electric cylinder, etc. Preferably, the adapter frame 400 is a linear motor, and the upper end of the telescopic rod 510 of the linear motor is connected to the upper end plate 410 of the adapter frame 400. Therefore, when the linear motor drives the adapter frame 400 to move up and down, the adapter frame 400 drives the injection rod 300 to move up and down for suction and injection. When the telescopic rod 510 of the linear motor moves down, it also drives the sleeve 600 to move down to its bottom to contact the top of the suction nozzle on the pipette 100 and push the suction nozzle off the pipette 100. The adapter block 200 is provided with a roller A located below the linear motor and in contact with the inner side of the vertical plate of the adapter frame 400, so that the roller A can effectively cooperate with the pipette 100 to limit the adapter frame 400.

[0034] As attached Figure 3 As shown, the adapter block 200 is slidably disposed on the first guide rail B, the first guide rail extends along the axial direction of the pipette 100, and the adapter block 200 is connected to a first driving mechanism C that drives it to reciprocate along the guide rail. The first driving mechanism C can be a linear module, preferably, the first driving mechanism C includes a first motor C1, the first motor C1 is connected to an upper roller C2, the upper roller C2 is connected to a lower roller C4 through a transmission belt C3, the lower roller C4 is rotatably disposed on a bracket C5, and the first guide rail and the first motor C1 are disposed on the bracket C5.

[0035] As attached Figure 3 As shown, the guide bracket C5 is movably arranged on the second guide rail D, and the second guide rail D extends horizontally. The bracket C5 is connected to the second driving mechanism E that drives it to move along the second guide rail D. The specific structure of the second driving mechanism E is the same as that of the first driving mechanism C, and will not be repeated here. The second driving mechanism E and the second guide rail D are arranged on the gantry F.

[0036] Example 2

[0037] This embodiment discloses a detection setting, including the pipetting structure as described above.

[0038] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A pipetting mechanism, comprising a pipette, characterized in that: The upper end of the pipette is connected to an adapter block, and the adapter block includes a suction hole connected to the suction hole of the pipette. An injection rod is provided in the suction hole, and the injection rod is connected to an adapter frame. The adapter frame is connected to a driver that drives it to reciprocate along the axial direction of the pipette and is connected to the adapter block. The adapter frame is provided with a sleeve that is sleeved on the outer periphery of the pipette.

2. The liquid transfer mechanism according to claim 1, characterized in that: The lower end of the pipette is an inverted frustum.

3. The liquid transfer mechanism according to claim 2, characterized in that: At least one first sealing ring is sleeved on the inverted truncated cone.

4. The liquid transfer mechanism according to claim 1, characterized in that: The upper end of the suction hole includes a first step surface and a second step surface distributed up and down, a guide sleeve sleeved on the outer periphery of the injection rod is fixed on the first step surface, and a second sealing ring sealingly sleeved on the outer periphery of the injection rod is arranged on the second step surface.

5. The liquid transfer mechanism according to claim 1, characterized in that: The adapter block is provided with an auxiliary air hole extending in the radial direction of the suction hole and communicating with the suction hole. The auxiliary air hole is located at the lower end of the adapter block, and a one-way valve is sealed at the auxiliary air hole.

6. The liquid transfer mechanism according to claim 1, characterized in that: The driver is a linear motor.

7. The liquid transfer mechanism according to claim 6, characterized in that: The adapter block is provided with a roller located below the linear motor and in contact with the inner side of the vertical plate of the adapter frame.

8. The liquid transfer mechanism according to any one of claims 1 to 7, characterized in that: The adapter block is slidably disposed on a first guide rail, the guide rail extends along the axial direction of the pipette, and the adapter block is connected to a first driving mechanism that drives the pipette to reciprocate along the guide rail.

9. The liquid transfer mechanism according to claim 8, characterized in that: The bracket where the guide rail and the first driving mechanism are located is movably arranged on a second guide rail, the second guide rail extends horizontally, and the bracket is connected to a second driving mechanism that drives it to move along the second guide rail.

10. Testing equipment, characterized in that: Comprising a pipetting mechanism as described in any one of claims 1-9.

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