CN223597128U - A rapid testing device for pipette seal - Google Patents

Abstract

This utility model discloses a rapid pipette seal testing device, including a testing main unit. The testing main unit is sealed and connected to a vacuum mechanism and a testing mechanism via pipes. The testing mechanism includes a gas-liquid separator, a pipette clamp, and a testing container. The top of the testing container has a detachable horizontal sealed cover with a testing through-hole and several pipette tip insertion holes. A pipette tip sealing assembly is installed in each pipette tip insertion hole and is located below the cover. The testing through-hole, gas-liquid separator, and testing main unit are sequentially and sealed and connected via pipes. When used by a single inspector, this utility model can complete the test within 15 seconds. If used with multiple testing containers, it can simultaneously test up to 6 12-channel pipettes. The instrument can automatically set the testing time, perform one-button testing, and has very precise time and pressure control, greatly reducing the labor intensity of inspectors and making the testing process more efficient and the test quality more stable.

Description

Quick verifying attachment of pipettor seal

Technical Field

The utility model relates to the field of inspection equipment, in particular to a rapid inspection device for the tightness of a pipette.

Background

The development of a quick detection device for the tightness of the pipettor is characterized in that the device can accurately position the channel with the tightness of the multichannel pipettor, the existing detection equipment in the market at present can only detect the channel with the tightness not reaching the standard in sequence, a 12-channel pipettor is taken as an example, 2 people are required to operate, one person pumps and presses, one person counts time, at least 2 minutes are required to detect each channel, more than 24 minutes are required to finish the 12 channels, the existing detection equipment is difficult to pump, the air pressure is not easy to stabilize, one person pumps and the other person counts time by using a stopwatch, the labor is consumed, the reworking is easy, the detection process is complicated, and the working efficiency is low.

Disclosure of utility model

The utility model aims to provide a rapid inspection device for the tightness of a liquid dispenser, which aims to solve the problems in the background technology.

In order to solve the technical problems, the utility model provides the following technical scheme:

The quick testing device for the tightness of the pipettor comprises a testing host, wherein the testing host is respectively and hermetically communicated with a vacuumizing mechanism and a testing mechanism through pipelines;

The testing mechanism comprises a gas-water separator, a liquid-transfering device clamp and a testing container, wherein a detachable horizontal sealing upper cover is arranged at the top of the testing container, a testing through hole and a plurality of liquid-transfering device gun head jacks are formed in the upper cover, a liquid-transfering device gun head sealing component is arranged in each liquid-transfering device gun head jack, the liquid-transfering device gun head sealing component is located below the upper cover, and the testing through hole, the gas-water separator and the testing host are sequentially communicated in a sealing mode through pipelines.

In a further embodiment, the pipette tip sealing assembly comprises a pipette tip tube vertically distributed below the upper cover, an opening at the top of the pipette tip tube is coaxially communicated with a pipette tip jack, a tip sealing ring is arranged inside the pipette tip tube, and a cannula fixing module is arranged on the pipette tip tube.

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

In a further embodiment, the gun head sealing ring is a rubber sealing ring which is fixed on the inner wall of the gun head tube of the liquid transfer device in a surrounding manner and gradually thickens from top to bottom.

In a further embodiment, the vacuumizing mechanism comprises a vacuum pump and a one-way check valve, and the vacuum pump, the one-way check valve and the testing host are sequentially communicated in a sealing manner through a pipeline.

Compared with the prior art, the utility model has the beneficial effects that:

1. When a single detector is used, the detection can be completed within 15 seconds, a set of host can be matched with a plurality of containers for testing through the gas flow divider, at most, 612 channel pipettes can be detected simultaneously, the instrument can set the detection time by itself, one-key detection is performed, automatic pressure relief is realized after the detection is completed, the control and the control are very accurate, the detection efficiency is improved, the labor intensity of the detector is greatly reduced, the detection process is more efficient, and the detection quality is more stable;

2. The utility model can test a plurality of channels of the liquid dispenser simultaneously, saves test time, and simultaneously meets the test methods of the bubble method and the leakage rate method required by the procedures of ISO-8655-2 Piston type capacity measuring instrument-Part 2 liquid dispenser (Piston-operated volumetric apparatus-Part2: pipettes) and JJG-646;

3. according to the utility model, different specifications can be replaced for the test container, so that pipettes with different specifications and different channel numbers can be freely adapted according to requirements, and the test container is flexible and convenient.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a pipette tip seal assembly according to the present utility model;

FIG. 3 is a schematic view of the position of the tip seal ring of the present utility model within the tip tube of a pipette.

In the figure, 1, a host for testing; 2, a gas-water separator, 3, a liquid-transferring device clamp, 4, a testing container, 5, an upper cover, 6, a testing through hole, 7, a liquid-transferring device gun head jack, 8, a liquid-transferring device gun head placing pipe, 9, a gun head sealing ring, 10, a position indicating plate, 11, a supporting rod, 12, a vacuum pump, 13 and a one-way check valve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1-3, the embodiment provides a quick testing device for the tightness of a liquid dispenser, which comprises a testing host 1, wherein the testing host 1 is respectively and hermetically communicated with a vacuumizing mechanism and a testing mechanism through pipelines, the testing mechanism comprises a gas-water separator 2, a liquid dispenser clamp 3 and a testing container 4, a detachable horizontal sealing upper cover 5 is arranged at the top of the testing container 4, a testing through hole 6 and a plurality of liquid dispenser gun plug jacks 7 are formed in the upper cover 5, a liquid dispenser gun plug sealing assembly is arranged in the liquid dispenser gun plug jack 7 and is positioned below the upper cover 5, the testing through hole 6, the gas-water separator 2 and the testing host 1 are sequentially and hermetically communicated through pipelines, the testing container 4 and the upper cover 5 thereof are made of transparent materials according to use requirements, and the number of the liquid dispenser gun plug jacks 7 can be flexibly adapted according to a liquid dispenser to be tested.

The pipette tip sealing assembly comprises a pipette tip tube 8 vertically distributed below an upper cover 5, an opening at the top of the pipette tip tube 8 is coaxially communicated with a pipette tip insertion hole 7, a tip sealing ring 9 is arranged inside the pipette tip tube 8, an insertion tube fixing module is arranged on the pipette tip tube 8, the insertion tube fixing module comprises a position indicating plate 10 which is fixed on the side wall of the pipette tip tube 8 and is horizontally distributed, a supporting rod 11 is fixed on the position indicating plate 10, the other end of the supporting rod 11 is fixed below the upper cover 5, the pipette tip tube 8 is made of transparent materials according to requirements, and the position indicating plate 10 is required to be made of special colors, preferably green.

The gun head sealing ring 9 is a rubber sealing ring which is fixed on the inner wall of the gun head tube 8 of the liquid transfer device in a surrounding manner and gradually thickens from top to bottom.

The vacuum pumping 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 testing host machine 1 are sequentially communicated in a sealing way through pipelines.

When the automatic test device is used, firstly, proper distilled water is added into the test container 4 through the test through hole 6 and added to the position of the color position indicating plate 10, so that the bottom end opening of the pipette tip placing tube 8 is always kept underwater, then the pipette tip is inserted into the pipette tip inserting hole 7, when the pipette tip is extruded and sealed by the gun tip sealing ring 9 in the pipette tip placing tube 8, the upper part of the pipette is fixed by using the pipette tip clamp 3, then a pipeline is communicated to the test through hole 6 and sealed, and then the test host 1 and the vacuum pump 12 are respectively started to perform corresponding detection work.

In this embodiment, when single inspector uses, can accomplish the inspection in 15s, 1 accessible gas shunt of host computer for the test matches a plurality of containers for the test 4 in addition, but at most simultaneous detection 6 12 passageway pipettors, the instrument can set up inspection time by oneself, and the one-key inspection is accomplished the automatic pressure release of back after the inspection, and the control time is pressed very accurately, and detection efficiency promotes higher, has greatly reduced inspector intensity of labour, makes the testing process more efficient, and detection quality is more stable.

In this embodiment, the test host 1 has an air inlet and an air outlet, the air outlet is connected with the vacuum pump 12, and a one-way check valve 13 is additionally arranged in the middle to prevent leakage of the end of the vacuum pump 12. The other end of the host is connected with the middle of the test container 4 and is additionally provided with a gas-water separator 2, preventing water drops from entering the instrument and causing damage to the instrument. If a plurality of test containers 4 are needed, a gas diverter can be additionally arranged, the more the test containers 4 are added, the more pipettors are detected for a single time, and the vacuumizing time is relatively prolonged. The test container 4 is currently designed into 5 types according to the conventional pipettors on the market, namely 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, wherein the test container 4 is made of transparent acrylic, and is in a cylindrical design, so that better tightness can be achieved, the pipette gun head tube 8 inside the test container 4 is made of glass, namely 12 glass tubes, namely 8 glass tubes, for measurement of a bubble observation method, and a green fixed position indicating plate 10 is arranged inside the test container, on one hand, the glass tubes are fixed, on the other hand, the water level line is prompted, requirements are met in the gauge, and the glass tubes are required to be inserted into water by 5cm, so that the position of the green baffle is used as a standard. The upper end of the pipette tip tube 8 adopts a back-off through hole sealing ring, and the pipette tip tube can have very good tightness after being inserted. The manipulator clamping device is arranged above the test container 4, and in order to ensure that the pipettor is fully contacted with the sealing ring and sealed, the pipettor is required to be vertical to the horizontal direction by 90 degrees after being inserted into the reverse through hole sealing ring.

This example satisfies both the bubble observation method and the leak rate method test method required by the procedure of ISO-8655-2 Piston-type volume measuring instrument, part2: pipettor (Piston-operated volumetric apparatus-Part2: pipettes). The bubble observation method is to use a transparent wide-mouth reagent bottle filled with clear water, three holes are formed in a bottle stopper, a vacuum gauge, a test glass tube and an air extracting device (a glass injector is selected) are respectively arranged on the bottle stopper, a to-be-detected liquid extracting device with a liquid absorbing nozzle is connected to the upper end of the test glass tube which is immersed in 5cm of liquid, the air extracting device is started, a pointer of the vacuum gauge indicates 0.04Mpa, after balance is achieved, the test glass tube is kept for 5 seconds, no bubbles are generated at the lower end of the test glass tube, the leak rate test method is to connect the vacuum gauge, the air extracting device and the to-be-detected liquid extracting device, the air extracting device is started, the pointer of the vacuum gauge indicates-0.04 MPa, air extracting is stopped after balance is achieved, and the duration is 5 seconds, and the negative pressure value change value in the to-be-detected liquid extracting device cannot exceed 5kPa.

The main machine 1 for testing in the embodiment comprises a liquid crystal display, a negative pressure sensor, a control main board and other components, and has the following functions of 1, a pressure setting function, 4, a multi-program control pressure setting function, wherein the pressure range is-60-0 Kpa, 2, the time setting function is 1 s-24 h, after the pressure and time are set, the main machine is started by pressing a start key device, the timing is started after the set pressure is reached, the automatic pressure relief is performed after the set time is reached, the leakage rate and the time pressure curve in the whole testing process are displayed, 3, the pressure compensation function is that if a tiny leakage exists in a pipeline or a container, the pressure compensation can be performed automatically, and 4, the multi-program control pressure function is that 8 times of pressure and time can be freely set, and the main machine can test one by one according to the set time and the pressure.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The quick testing device for the tightness of the pipettor is characterized by comprising a testing host machine (1), wherein the testing host machine (1) is respectively and hermetically communicated with a vacuumizing mechanism and a testing mechanism through pipelines;

The testing mechanism comprises a gas-water separator (2), a liquid-transferring device clamp (3) and a testing container (4), wherein a detachable horizontal sealing upper cover (5) is arranged at the top of the testing container (4), a testing through hole (6) and a plurality of liquid-transferring device gun head jacks (7) are formed in the upper cover (5), a liquid-transferring device gun head sealing assembly is arranged in the liquid-transferring device gun head jacks (7), the liquid-transferring device gun head sealing assembly is located below the upper cover (5), and the testing through hole (6), the gas-water separator (2) and the testing host (1) are sequentially in sealing communication through pipelines.

2. The rapid inspection device for the tightness of the liquid dispenser according to claim 1, wherein the liquid dispenser gun head sealing assembly comprises liquid dispenser gun head containing tubes (8) vertically distributed below an upper cover (5), an opening at the top of each liquid dispenser gun head containing tube (8) is coaxially communicated with a liquid dispenser gun head jack (7), gun head sealing rings (9) are arranged inside the liquid dispenser gun head containing tubes (8), and cannula fixing modules are arranged on the liquid dispenser gun head containing tubes (8).

3. The rapid inspection device for the tightness of a pipette according to claim 2, wherein the cannula fixing module comprises a horizontally distributed position indication plate (10) fixed on the side wall of a pipette tip tube (8), a supporting rod (11) is fixed on the position indication plate (10), and the other end of the supporting rod (11) is fixed below the upper cover (5).

4. The rapid inspection device for the tightness of a pipette according to claim 2, wherein the gun head sealing ring (9) is a rubber sealing ring which is fixed on the inner wall of a gun head tube (8) of the pipette in a surrounding manner and gradually thickens from top to bottom.

5. The rapid inspection device for the tightness of a pipette according to claim 1, wherein the vacuumizing 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 main machine (1) for testing are sequentially communicated in a sealing manner through pipelines.