CN201892624U - Miniature automatic liquid sampler - Google Patents

Abstract

The utility model relates to a miniature automatic liquid sampler, which consists of a timing device, a miniature sampling pump, a sample diversion bottle, a sample distribution device and a sample receiving plate, wherein the timing device is connected with the miniature sampling pump; the outlet of the miniature sampling pump is connected with the inlet of the sample diversion bottle; the outlet of the sample diversion bottle is connected with the inlet of the sample distribution device; and the outlet of the sample distribution device is connected with the sample receiving plate. The sampler can automatically, sequentially and precisely perform liquid sampling at different time, the disturbance is small in the washing process of the sampler, sample waste is small, small-volume sampling can be performed, and the miniature sampler can be widely applied in the research field.

Description

Micro Automatic Liquid Sampler

Technical field:

The utility model relates to a liquid sampling device, in particular to a miniature automatic liquid sampler capable of sampling in small volumes and automatically and sequentially and accurately collecting liquid samples at different times.

Background technique:

At present, all kinds of samplers sold in the market are foreign products, which are bulky, complicated to operate, and expensive. Its sampling pump can automatically extract and evacuate liquid, and the flow control accuracy is high. However, the price is expensive, a large amount of liquid is collected during sampling, and the disturbance is large when the sampling pipeline is rinsed, so it is not suitable for small volume sampling, especially not suitable for sampling with limited liquid volume. The control system is a computer control system, which is expensive and complicated to operate, and is difficult to popularize. So far, there is no sampler on the market that can automatically and accurately collect liquid samples at different times, miniaturization, less disturbance during rinsing, less sample waste, small volume sampling, low cost, simple operation, stable and reliable sampler.

Invention content:

The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art, and provide a miniature automatic liquid sampler, which can sample in small volumes, and can automatically and accurately collect liquid samples at different times, with miniaturization, Less disturbance during rinsing and less sample waste.

Conceived as above, the technical solution of the present utility model is: a miniature automatic liquid sampler, characterized in that: it is composed of a timing device, a miniature sampling pump, a sample shunt bottle, a sample distribution mechanism and a sample receiving tray; the timing device and the miniature sampling pump The outlet of the micro sampling pump is connected to the inlet of the sample split bottle, the outlet of the sample split bottle is connected to the inlet of the sample distribution mechanism, and the outlet of the sample distribution mechanism is connected to the sample receiving plate.

There are overflow holes, flow stabilization holes, and sampling holes on the side of the above-mentioned sample splitter bottle, a sample injection hole on the top, and a liquid discard hole on the bottom. There is a middle partition in the middle of the sample splitter bottle, and a filter screen is arranged above the middle partition. A partition hole is arranged on the middle partition; the sampling hole is connected with the inlet pipe of the sample distribution mechanism through a sampling pipe.

The above-mentioned flow stabilization hole is connected with a pipeline perpendicular to the liquid surface, and the vertical pipeline is a socket structure in which the height of two pipelines can be adjusted.

The above-mentioned sampling pipeline is obliquely socketed on the inlet pipeline of the sample distribution mechanism, and the two pipelines can rotate independently of each other.

The lower part of the middle partition is an inverted triangle structure.

The above sample distribution mechanism is composed of an electromagnet, a traction disc, a rotating disc, a positioning disc and a sample distribution nozzle; the traction disc is equipped with dial teeth and springs, and several dial slots are distributed on the circumference of the rotating disc. The positioning roulette, the sample distribution nozzle is fixed on the rotating roulette, the sampling tube is fixed on the locating roulette, grooves are evenly opened on the surrounding wall of the locating roulette, and the side of the locating roulette is connected with a positioning pulley.

Several centrifugal sampling bottles are evenly placed around the above-mentioned sample receiving tray.

An ice bag compartment can be arranged in the middle of the above-mentioned sample receiving tray.

The utility model has the following advantages and positive effects:

1. The sample shunt bottle designed using the principle of fluid mechanics replaces the advanced peristaltic pump, which can quickly discard the residual liquid sample in the sampling pump pipeline, and at the same time rinse the pipeline, so that the sample taken truly reflects the actual situation.

2. This design reduces the sampling flow accuracy requirements of the sampling pump, so that ordinary micro pumps can replace high-level pumps for sampling, and realize less disturbance during rinsing, less sample waste, and small volume sampling.

3. The sample distribution wheel mechanism is designed by using mechanical principles to replace the stepping motor to solve the problem of sample distribution. The structure is corrosion-resistant, does not need electricity, and can be miniaturized.

4. This design greatly reduces the production cost of the equipment, has simple structure, corrosion resistance, and stable and reliable operation.

Description of drawings:

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure of a sample split bottle.

Fig. 3 is an inverted perspective view of the sample distribution tray.

Fig. 4 is a plane design diagram of the positioning wheel.

Fig. 5 is a plane design diagram of the rotating wheel.

Figure 6 is a plan view of the sample receiving tray.

Detailed ways:

As shown in FIG. 1 , a miniature liquid automatic sampler is composed of a timing device 4 , a miniature sampling pump 5 , a sample split bottle 1 , a sample distribution mechanism 2 and a sample receiving tray 3 . The timing device is connected to the micro-sampling pump, the outlet of the micro-sampling pump is connected to the inlet of the sample split bottle, the outlet of the sample split bottle is connected to the inlet of the sample distribution mechanism, and the outlet of the sample distribution mechanism is connected to the sample receiving tray.

As shown in Figure 2: there are overflow holes 6, flow stabilization holes 7, and sampling holes 8 on the side of the sample splitter bottle, sampling holes 9 on the top, liquid discarding holes 10 on the bottom, and a middle partition in the middle of the sample splitter bottle , a filter screen 11 is arranged above the middle partition, the bottom of the middle partition and the sample splitter bottle is an inverted triangle structure, and there is a partition hole 12 on the middle partition; the sampling hole is obliquely socketed to the inlet of the sample distribution mechanism through the sampling pipe 13 Pipeline connection, the two pipes can rotate independently of each other, the flow rate of the inlet liquid is slightly larger than the flow rate of the flow stability hole, the flow rate of the partition hole is larger than that of the liquid discharge hole, Q _{sampling hole} =Q _{partition hole} -Q _{liquid discharge hole} -Q _{overflow hole} . The above-mentioned flow stabilization hole is connected with a pipeline perpendicular to the liquid surface, and the vertical pipeline is a socket structure in which the height of two pipelines can be adjusted.

The working process of the sample split bottle is: the timing device is turned on, the liquid is pumped into the sample split bottle 1 by the micro-sampling pump 5, the liquid is filtered through the filter screen to remove large particles, so as not to block the pipeline, the initial liquid is discarded through the liquid discarding hole, And the sampling pump pipe and sample split bottle are rinsed. As time goes on, because the liquid flow rate of the separator hole is greater than the flow rate of the liquid discarding hole, the liquid level rises gradually until the sampling hole, and the sample enters the pipeline connected with the sample distribution mechanism through the sampling hole. When the flow rate of the pump exceeds the maximum flow rate of the partition hole, the sample is discharged from the flow stabilization hole. When the flow rate of the partition hole is greater than the maximum flow rate of the sampling hole, the sample is discharged from the overflow hole. The timing device is closed, the sampling pump stops feeding the liquid, the liquid in the sample distribution bottle is emptied through the liquid discarding hole, and the liquid returns to the original liquid.

As shown in FIG. 3 : the sample distribution mechanism is composed of a puller 14 , a rotating wheel 15 , a positioning wheel 16 and a sample distribution pipe (not shown) connected to the sampling pipe 13 . Pull tooth 17 and spring (not marked among the figure) are housed on the traction disc. A number of shifting tooth grooves 18 are distributed on the circumference of the rotating wheel. A positioning wheel is installed on the rotating wheel. The sample distribution pipe is installed on the positioning wheel. Positioning pulley 20 is connected.

The working principle of the sample distribution mechanism is: for the convenience of observation, the sample distribution mechanism is inverted. The timing device is turned on, the electromagnet is in the energized state, the traction disc is pulled by the traction rod, the traction disc drives the traction dial, the dial is pressed into the dial slot by the spring, and the rotating wheel is driven to rotate, and the rotating wheel drives the sampling tube to rotate, and the sampling tube Connected with the sample distribution nozzle, the sample distribution nozzle swings at a certain angle accordingly, the positioning wheel is fixed on the sampling tube, the positioning wheel rotates, the positioning pulley slides into the next groove, and the positioning swing angle is determined. After a while, the sample flows into the sampling tube through the sample split bottle, enters the sampling bottle, and starts sampling. When the sampling is completed, the timing device is closed, the electromagnet loses its tension, and the traction disc is pulled back by the spring. Since the traction gear moves in the direction of the cogging, the rotating disc is not stressed. At the same time, the positioning wheel is positioned, and the sampling tube and the rotating disc do not rotate. , to complete a sampling.

A plurality of centrifuge sampling bottles 21 are evenly placed around the sample receiving tray, and an ice bag compartment 22 can be arranged in the middle. After the sampling is completed, the sampling bottle can be placed in a centrifuge for centrifugation.

Claims (8)

1. a miniature automatic liquid sampler is characterized in that: be made up of timing device, miniature sampling pump, sample shunting bottle, sample distributor gear and sample tray; Timing device is connected with miniature sampling pump, and miniature sampling delivery side of pump is connected with the import of sample shunting bottle, and the outlet of sample shunting bottle is connected with the import of sample distributor gear, and the outlet of sample distributor gear is connected with the sample tray.

2. miniature automatic liquid sampler according to claim 1, it is characterized in that: above-mentioned sample shunting bottle side has spout hole, stability of flow hole, thief hole, the top has sample holes, the bottom has abandons the liquid hole, there is central dividing plate at sample shunting bottle middle part, the central dividing plate top is provided with filter screen, and the dividing plate hole is arranged on the central dividing plate; Thief hole is connected by the inlet pipeline of sampling pipe with the sample distributor gear.

3. miniature automatic liquid sampler according to claim 1 is characterized in that: above-mentioned sample distributor gear distributes mouth to constitute by electromagnet, sheave, rotating wheel disk, location wheel disc and sample; Moving tooth and spring are housed on the sheave, several moving tooth grooves of rotating wheel disk circle distribution, the location wheel disc is installed on the rotating wheel disk, fixed sample distributes mouth on the rotating wheel disk, be fixed with stopple coupon on the wheel disc of location, the locating wheel disk ring evenly has groove on circumferential wall, the side of location wheel disc is connected with the location pulley.

4. miniature automatic liquid sampler according to claim 1 is characterized in that: evenly place several centrifugal sampling jars around the above-mentioned sample tray.

5. miniature automatic liquid sampler according to claim 2 is characterized in that: above-mentioned stability of flow hole links to each other with the vertical pipeline of liquid level with one, and this vertical pipe is two height-adjustable bell and spigot frames of pipeline.

6. miniature automatic liquid sampler according to claim 2 is characterized in that: above-mentioned sampling pipe inclination socket joint is to the inlet pipeline of sample distributor gear, and two pipeline enclosures can separately rotate.

7. miniature automatic liquid sampler according to claim 2 is characterized in that: above-mentioned central dividing plate bottom is the inverted triangle structure.

8. miniature automatic liquid sampler according to claim 4 is characterized in that: above-mentioned sample tray middle part can be provided with the ice bag storehouse.

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