Rapid testing device for tightness of pipettor

Abstract

The utility model discloses a pipettor tightness rapid inspection device, which comprises a test host machine, and the test host machine is respectively communicated with a vacuumizing mechanism and a test mechanism in a sealing way through pipelines; the testing mechanism comprises a gas-water separator, a pipettor clamp and a testing container, a detachable horizontal sealing upper cover is arranged at the top of the testing container, a testing through hole and a plurality of pipettor gun head insertion holes are formed in the upper cover, a pipettor gun head sealing assembly is arranged in each pipettor gun head insertion hole, and the pipettor gun head sealing assemblies are located below the upper cover; and the through hole for testing, the gas-water separator and the host for testing are sequentially and hermetically communicated through pipelines. When a single detector is used, the detection can be completed within 15 seconds, if a plurality of test containers are matched, at most 6 12-channel pipettors can be detected at the same time, the instrument can automatically set the detection time, one-key detection is realized, time and pressure control is very accurate, the labor intensity of the detector is greatly reduced, the detection process is more efficient, and the detection quality is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of testing equipment, concretely to a pipettor adhesion quick testing device. BACKGROUND

[0002] A pipettor adhesion quick testing device is developed, and the key technical point of the device is whether the device can accurately position the channels of the multi-channel pipettor that do not meet the adhesion performance, the existing detection equipment on the market can only detect single channels one by one, for example, for a 12-channel pipettor, two people are needed to operate, one person draws and presses, and the other person times, and it takes at least 2 minutes to detect each channel, and it takes more than 24 minutes to complete 12 channels, and the existing detection equipment has difficulty in drawing air, and the air pressure is not easy to stabilize, one person draws air and the other person uses a stopwatch to time, which consumes manpower and is prone to rework, the testing process is complicated, and the working efficiency is low. UTILITARIAN CONTENT

[0003] The utility model aims at providing a pipettor adhesion quick testing device to solve the problems in the background art.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A pipettor adhesion quick testing device, comprising a test host, the test host is sealed and communicated with a vacuumizing mechanism and a test mechanism through a pipeline;

[0006] The test mechanism comprises a gas-water separator, a pipettor clamp and a test container, the test container is provided with a detachable horizontal sealing upper cover at the top, the upper cover is provided with a test through hole and a plurality of pipettor tip jacks, the pipettor tip jack is provided with a pipettor tip sealing assembly, and the pipettor tip sealing assembly is located below the upper cover; the test through hole, the gas-water separator and the test host are sequentially and sealingly communicated through the pipeline.

[0007] In a further embodiment, the pipettor tip sealing assembly comprises a pipettor tip tube vertically distributed below the upper cover, the pipettor tip tube top opening is coaxially communicated with the pipettor tip jack, and the pipettor tip tube is provided with a tip sealing ring; the pipettor tip tube is provided with a tube fixing module.

[0008] In a further embodiment, the tube fixing module comprises a position indicating plate fixed on the side wall of the pipettor tip tube and horizontally distributed, the position indicating plate is fixed with a supporting rod, and the other end of the supporting rod is fixed below the upper cover.

[0009] In a further embodiment, the tip sealing ring is a rubber sealing ring that is fixed around the inner wall of the pipettor tip tube and gradually thickens from top to bottom.

[0010] In further embodiments, the vacuumizing mechanism comprises a vacuum pump and a one-way check valve, and the vacuum pump, the one-way check valve and the host computer for testing are sequentially and sealingly communicated through pipes.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] First, the utility model can complete the inspection within 15s when a single inspector uses it, one host computer can be matched with multiple containers for testing through a gas shunt, and at most 6 12-channel pipettors can be simultaneously tested, the instrument can set the inspection time, one-key inspection, and automatic pressure relief after the inspection is completed, the time and pressure control are very accurate, the detection efficiency is higher, the labor intensity of the inspector is greatly reduced, the detection process is more efficient, and the detection quality is more stable.

[0013] Second, the utility model can simultaneously test multiple channels of the pipettor, save the inspection time, and meet the bubble method and the leakage rate method required by ISO-8655-2 "Piston-operated volumetric apparatus-Part 2: pipettes" and JJG-646 regulations.

[0014] Third, the utility model can replace the test container with different specifications, so that different specifications and different channel numbers of pipettors can be freely adapted according to requirements, and the utility model is flexible and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Fig. 2 It is a schematic diagram of the structure of the pipettor tip sealing assembly of the utility model;

[0017] Fig. 3 It is a schematic diagram of the position of the tip sealing ring in the pipettor tip pipe.

[0018] In the figure: 1, test host computer; 2, gas-water separator; 3, pipettor clamp; 4, test container; 5, upper cover; 6, test through hole; 7, pipettor tip insertion hole; 8, pipettor tip pipe; 9, tip sealing ring; 10, position indicating plate; 11, support rod; 12, vacuum pump; 13, one-way check valve. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0020] Embodiment

[0021] As shown in the drawings, the present embodiment provides a quick test device for the tightness of a pipette, which comprises a test host 1, and the test host 1 is in sealed communication with a vacuum extraction mechanism and a test mechanism through pipelines. Figs. 1-3 The test mechanism comprises a gas-water separator 2, a pipette clamp 3 and a test container 4, the test container 4 is provided with a detachable horizontal sealing upper cover 5 at the top, the upper cover 5 is provided with a test through hole 6 and a plurality of pipette tip jacks 7, the pipette tip jack 7 is provided with a pipette tip sealing assembly, and the pipette tip sealing assembly is located below the upper cover 5; the test through hole 6, the gas-water separator 2 and the test host 1 are in sealed communication through pipelines; the test container 4 and the upper cover 5 thereof are made of transparent materials according to the needs of use, and the number of the pipette tip jacks 7 can be flexibly adapted to the pipette to be tested.

[0022] The pipette tip sealing assembly comprises a pipette tip pipe 8 vertically distributed below the upper cover 5, the top opening of the pipette tip pipe 8 is coaxially communicated with the pipette tip jack 7, and the pipette tip pipe 8 is provided with a tip sealing ring 9 inside; the pipette tip pipe 8 is provided with a pipe fixing module; the pipe fixing module comprises a position indicating plate 10 fixed horizontally on the side wall of the pipette tip pipe 8, the position indicating plate 10 is fixed with a support rod 11, and the other end of the support rod 11 is fixed below the upper cover 5; the pipette tip pipe 8 is also made of transparent materials according to the needs, and the position indicating plate 10 needs to be made of special color, preferably green, since it is used to indicate the water level.

[0023] The tip sealing ring 9 is a rubber sealing ring which is fixed around the inner wall of the pipette tip pipe 8 and gradually thickens from top to bottom.

[0024] The vacuum extraction mechanism comprises a vacuum pump 12 and a one-way check valve 13, and the vacuum pump 12, the one-way check valve 13 and the test host 1 are in sealed communication through pipelines.

[0025] In use, first, add appropriate distilled water into the test container 4 through the test hole 6, add to the color position plate 10, so that the pipette tip holder 8 bottom end opening is always kept underwater, then insert the pipette tip into the pipette tip insertion hole 7, when the pipette tip is pressed and sealed by the tip sealing ring 9 in the pipette tip holder 8, use the pipette clamp 3 to fix the upper part of the pipette, then connect the pipeline to the test hole 6 and seal it, then start the test main machine 1 and the vacuum pump 12 for corresponding detection work.

[0026] In the use of a single detection personnel, the test can be completed within 15s, in addition, a set of test main machine 1 can be matched with multiple test containers 4 through a gas shunt, and at most 6 12-channel pipettes can be detected simultaneously, the instrument can set the test time, one-key test, and automatically release pressure after test completion, the time and pressure control are very accurate, the detection efficiency is higher, and the labor intensity of the detection personnel is greatly reduced, so that the detection process is more efficient and the detection quality is more stable.

[0027] In the embodiment, the test main machine 1 has an air inlet and an air outlet, the air outlet is connected with the vacuum pump 12, a one-way check valve 13 is additionally arranged in the middle, and the end of the vacuum pump 12 is prevented from leaking. The other end of the main machine is connected with the test container 4, and a gas-water separator 2 is additionally arranged in the middle, so that water droplets are prevented from entering the instrument and causing damage to the instrument. If multiple test containers 4 need to be arranged, a gas shunt can be arranged, the more test containers 4 are arranged, the more pipettes are detected at a time, and the vacuum time is relatively prolonged. At present, five kinds of test containers 4 are designed according to commonly used pipettes on the market, which are a single-channel small-capacity test module, a single-channel large-capacity test module, a 4-channel test module, an 8-channel test module and a 12-channel test module. The test container 4 is made of transparent acrylic and has a cylindrical design, so that better sealing performance can be achieved. The pipette tip holder 8 in the test container 4 is made of glass, 12 channels are 12 glass tubes, and 8 channels are 8 glass tubes, which are used for bubble observation method measurement. A green fixed position plate 10 is arranged inside, which is used for fixing the glass tube and prompting the water level line. In the inspection regulation, the glass tube needs to be inserted into the water by 5cm, so the green shelf position is used as the standard. The upper end of the pipette tip holder 8 adopts a reverse threaded hole sealing ring, which has very good sealing performance after the pipette is inserted.

[0028] The embodiment meets the bubble observation method and the leakage rate test method required by ISO-8655-2 "Piston-operated volumetric apparatus-Part 2:pipettes" and JJG-646 regulations. The bubble observation method is that a transparent wide-mouth reagent bottle filled with clear water is used, three holes are respectively arranged on the bottle plug, a vacuum gauge, a test glass tube and a vacuum equipment (optionally a glass syringe) are respectively arranged on the bottle plug; the pipette to be tested with a liquid suction nozzle is connected to the upper end of the test glass tube which is 5cm away from the liquid, the vacuum equipment is started, the pointer of the vacuum gauge is indicated at 0.04Mpa, after reaching the balance, the test glass tube is continuously tested for 5s, at this time, no bubbles are generated at the lower end of the test glass tube; the leakage rate test method is that the vacuum gauge, the vacuum equipment and the pipette to be tested are connected, the vacuum equipment is started, the pointer of the vacuum gauge is indicated at-0.04MPa, after reaching the balance, the vacuum equipment is stopped, and the value of the negative pressure in the pipette to be tested is continuously tested for 5s, at this time, the value of the negative pressure in the pipette to be tested cannot be changed by more than 5kPa.

[0029] The host computer 1 for testing in the embodiment is composed of a liquid crystal display, a negative pressure sensor, a control mainboard and the like, and has the following functions: 1, pressure setting function: pressure range:-60-0Kpa; 2, time setting function: 1s-24h can be freely set, after the pressure and the time are set, the device is started by pressing the start key, the time is counted after the set pressure is reached, and the leakage rate and the time-pressure curve in the whole test process are displayed after the set time is reached; 3, pressure compensation function: if there is a small leakage in the pipeline or the container, the pressure compensation can be automatically corrected; 4, multi-thread pressure control function: 8 items of pressure and time can be freely set, and the device will test according to the set time and pressure.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pipette tightness quick check device, characterized by: Including test host (1), test host (1) is sealed with the vacuum mechanism and test mechanism respectively by pipeline communication respectively; The test mechanism includes a gas-water separator (2), a pipette clamp (3) and a test container (4), the top of the test container (4) is provided with a detachable horizontal sealing upper cover (5), the upper cover (5) is provided with a test through hole (6) and a plurality of pipette tip insertion holes (7), the pipette tip insertion hole (7) is provided with a pipette tip sealing assembly, the pipette tip sealing assembly is located below the upper cover (5), the test through hole (6), the gas-water separator (2) and the test host (1) are sequentially sealed and communicated by pipeline.

2. The pipette adhesion quick check device of claim 1, wherein: The pipette tip sealing assembly includes a pipette tip placement tube (8) vertically distributed below the upper cover (5), the pipette tip placement tube (8) is coaxially communicated between the top opening and the pipette tip insertion hole (7), and the pipette tip placement tube (8) is provided with a tip sealing ring (9) inside; The pipette tip placement tube (8) is provided with a tube fixing module.

3. The pipette adhesion quick check device of claim 2, wherein: The tube fixing module includes a position indicating plate (10) fixed on the side wall of the pipette tip placement tube (8) and horizontally distributed, the position indicating plate (10) is fixed with a support rod (11), and the other end of the support rod (11) is fixed below the upper cover (5).

4. The pipette adherence quick check device of claim 2, wherein: The tip sealing ring (9) is a rubber sealing ring which is fixed around the inner wall of the pipette tip placement tube (8) and gradually thickens from top to bottom.

5. The pipette adhesion quick check device of claim 1, wherein: The vacuum mechanism includes a vacuum pump (12) and a one-way check valve (13), the vacuum pump (12), the one-way check valve (13) and the test host (1) are sequentially sealed and communicated by pipeline.

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