CN204964240U - Rapid sampling ware of no dead volume - Google Patents

Abstract

The utility model relates to the technical field of samplers, in particular to a fast sampler without dead volume, the structure of which includes a three-way pipe with a silk port, and the three connections of the three-way pipe are respectively a sampling port, a sample inlet and a liquid discharge port. The sampling port cover is provided with a sampling cover, and the gap between the sampling port and the sampling cover is provided with a silica gel pad; the inner cavity of the three-way pipe is provided with an isolation plate, which divides the inner cavity into two chambers, and one end of the isolation plate The inner side wall of the tee pipe opposite to the sampling port is fixedly connected, and the other end of the isolation plate is close to the silica gel pad and a gap is provided between the silica gel pad and the pad. Compared with the prior art, there is no dead volume in the sampler of the utility model, which effectively avoids the cross-contamination of the samples taken when taking multiple samples, thereby ensuring the accuracy of the detection results, and has a simple structure and easy operation. advantage.

Description

A Rapid Sampler Without Dead Volume

technical field

The utility model relates to the technical field of samplers, in particular to a fast sampler without dead volume.

Background technique

At present, with the listing of lithium-ion battery electric vehicles, the downstream lithium-ion battery electrolyte market is also growing. Since the lithium-ion battery electrolyte is very sensitive to air and moisture, a small amount of moisture may cause the electrolyte to deteriorate. Sampling is a special sampling tool. At the same time, this tool must take samples with body surface properties under the condition that the product is sealed.

Most of the rapid samplers used in the prior art have the problem of dead volume in the joint. If more than two samples are taken by the same sampler, there may be residues from the previous sample, which will cause crossover of the samples during the sampling process. Contamination will affect the accuracy of the final test results.

Contents of the invention

Aiming at the above-mentioned technical problems in the prior art, the utility model provides a fast sampler with simple structure and easy operation without dead volume. The sampler does not have a sampling dead volume, which reduces the cross-contamination of the samples taken. .

In order to achieve the above object, the utility model provides the following technical solutions:

A fast sampler without dead volume is provided, comprising a three-way pipe with a wire port, the three connections of the three-way pipe are respectively a sampling port, a sample inlet and a liquid discharge port, and the sampling port sleeve is provided with a sampling port. Cover, the gap between the sampling port and the sampling cover is provided with a silica gel pad; the inner cavity of the three-way pipe is provided with an isolation plate, and the isolation plate divides the inner cavity into two chambers. One end of the isolation plate is fixedly connected to the inner side wall of the tee pipe opposite to the sampling port, and the other end of the isolation plate is close to the silica gel pad and a gap is provided between the silica gel pad and the silica gel pad.

Wherein, the width of the gap is set to be 1-20 mm.

Wherein, the isolation plate is horizontally arranged in the inner cavity of the tee pipe where the sampling port is located.

Wherein, the isolation plate is arranged on the central axis of the sampling port.

Wherein, the sampling cover is provided with a sampling hole.

Wherein, the sampling hole is deviated from the center of the sampling cover.

Wherein, the drain port is connected to the drain pipe through a control valve.

Wherein, the sample inlet is connected with a reaction kettle storing the sample liquid through a control valve.

Wherein, the injection port is connected with a quick connector.

The beneficial effects of the utility model:

A fast sampler without dead volume of the utility model comprises a three-way pipe with a wire mouth, and the three interfaces of the three-way pipe are respectively a sampling port, a sample inlet and a liquid discharge port, and the sampling port cover is provided with a sampling cover , the gap between the sampling port and the sampling cover is provided with a silica gel pad; the inner cavity of the tee pipe is provided with an isolation plate, which divides the inner cavity into two chambers, and one end of the isolation plate is opposite to the sampling port. The inner side wall of the isolation plate is fixedly connected, and the other end of the isolation plate is close to the silica gel pad and has a gap between the silica gel pad and the pad. Before sampling, the front-end sample liquid is drained through the liquid discharge port, and then the sample liquid enters the inner cavity of the three-way pipe through the sample inlet. Due to the obstruction of the isolation plate, the sample liquid passes through the gap between the isolation plate and the silica gel pad. , and rinse the silica gel pad, and finally flow out through the drain port; when sampling, close the injection port, pass the needle tube with the sampling needle through the sampling cap and pass through the silica gel pad, and the needle tip penetrates into the inner cavity of the three-way tube, Under the action of pressure, the sampling needle is filled with samples, so as to achieve a better sampling purpose. Compared with the prior art, the utility model has the following advantages:

(1) Under the action of the isolation plate in the utility model, the sample liquid circulates in the entire sampler, so there is no dead volume, and the flowing sample liquid flushes the entire sampler, effectively avoiding the More samples are subject to cross-contamination, thereby ensuring the accuracy of the test results;

(2) The sample inlet of the utility model can be connected with a standard quick connector or connected with a reaction kettle equipped with sample liquid to facilitate rapid sample injection, and the liquid discharge port can be connected to a liquid discharge pipe for liquid discharge, so that there is no need to open the sampling cover to pass through The sampling port is used for draining, and the sampling and draining speed is fast and the working efficiency is high;

(3) The sampler of the utility model has a simple structure and is easy to operate, and is suitable for sample detection of electrolytes of lithium-ion batteries and other products that require special requirements such as anhydrous and airtight conditions.

Description of drawings

Fig. 1 is a structural schematic diagram of a fast sampler without dead volume of the present invention.

Fig. 2 is a schematic structural view of the first use state of a fast sampler without dead volume of the present invention.

Fig. 3 is a structural schematic diagram of a second use state of a fast sampler without dead volume of the present invention.

Reference signs:

Tee pipe 1, sampling port 11, sampling port 12, drain port 13;

Sampling cover 2, sampling hole 21;

Silicone pad 3;

Isolation plate 4;

Quick connector 5;

the first control valve 6;

Second control valve 7;

Drain pipe 8;

Reactor 9.

detailed description

The utility model is described in detail below in conjunction with specific embodiments and accompanying drawings.

A kind of fast sampler without dead volume of the present embodiment is shown in Fig. 1 to Fig. 3, comprises the tee pipe 1 with wire port, and three connections of tee pipe 1 are respectively sampling port 11, sampling port 12 And the drain port 13, the sampling port 11 is provided with a sampling cover 2, and the gap between the sampling port 11 and the sampling cover 2 is provided with a silica gel pad 3, so as to ensure that samples with body surface properties are obtained in a sealed state.

The inner cavity of the three-way pipe 1 is provided with a separation plate 4, and the separation plate 4 divides the inner chamber into two chambers. One end of the separation plate 4 is fixedly connected with the inner side wall of the three-way pipe 1 which is arranged opposite to the sampling port 11, and the separation plate The other end of 4 is close to the silica gel pad 3 and there is a gap between it and the silica gel pad 3 . The width of the gap is set to be 1-20 mm, and the specific size may be determined according to the size of the inner cavity of the tee pipe 1 .

Before sampling, the front-end sample liquid is first drained through the liquid discharge port 13, and then the sample liquid enters the inner cavity of the tee pipe 1 through the sample inlet 12. Due to the blocking of the isolation plate 4, the sample liquid flows from the isolation plate 4 and the silica gel pad. 3, and rinse the silica gel pad 3, and finally flow out through the drain port 13; when sampling, close the sampling port 12, pass the needle tube with the sampling needle through the sampling cap 2 and pass through the silica gel pad 3, The needle tip penetrates into the inner cavity of the three-way pipe 1, and under the action of pressure, the sampling needle is filled with samples, so as to achieve a better sampling purpose. Compared with the prior art, under the action of the isolation plate 4, the utility model circulates the sample liquid in the entire sampler, so there is no dead volume, and the flowing sample liquid flushes the entire sampler, effectively avoiding taking multiple When taking samples, the samples taken are subject to cross-contamination, thereby ensuring the accuracy of the test results.

In this embodiment, the isolation plate 4 is horizontally arranged in the inner cavity of the tee pipe 1 where the sampling port 11 is located, and is located on the central axis of the sampling port 11 . The sampling cover 2 is provided with a sampling hole 21, which is deviated from the center of the sampling cover 2, and is mainly used for the sampling needle to pass through the silica gel pad 3 for sampling.

As shown in Figure 2, during use, the sample inlet 12 can be connected to the standard quick connector 5, which is convenient for rapid sample injection, and the liquid discharge port 13 can be connected to the liquid discharge pipe 8 through the first control valve 6, which is convenient for rapid discharge. liquid.

As shown in Figure 3, during use, the sample inlet 12 can also be connected to the reaction kettle 9 or reaction tank storing the sampling liquid through the second control valve 7, so as to facilitate rapid sample injection, and the liquid discharge port 13 can pass through the first control valve. 6 is connected with the drain pipe 8, which is convenient for quick draining. In this way, there is no need to open the sampling cover 2 to discharge liquid through the sampling port 11, the sampling and liquid discharge speed is fast, and the working efficiency is high.

When operating sampling, first open the first control valve 6 connected to the liquid discharge port 13 to drain the front-end sample liquid, and then open the second control valve 7 connected to the sampling port 12 to allow the sample liquid to enter the three-way pipe from the sampling port 12 1, under the blocking of the partition, the sample liquid passes through the gap, washes the silica gel pad 3, and finally flows out through the drain port 13 and the drain pipe 8, and the sample liquid does not exist in the entire sampler. volume, the flowing sample liquid flushes the entire sampler; then, then close the first control valve 6 and the second control valve 7, pass the needle tube with the sampling needle through the sampling hole 21 of the sampling cover 2, and pass through the silica gel pad 3 Finally, the needle tip penetrates into the inner cavity of the three-way pipe 1, and under the action of pressure, the sampling needle is filled with samples, thereby achieving a better sampling purpose.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (9)

1. a fast sampler without dead volume is characterized in that: it comprises a tee pipe with a silk port, and the three interfaces of the tee pipe are respectively a sampling port, a sample inlet and a liquid discharge port, and the sampling port The mouth cover is provided with a sampling cover, and a silica gel pad is provided in the matching gap between the sampling port and the sampling cover; the inner cavity of the three-way pipe is provided with an isolation plate, and the isolation plate divides the inner cavity into two In the chamber, one end of the isolation plate is fixedly connected to the inner side wall of the tee pipe opposite to the sampling port, and the other end of the isolation plate is close to the silica gel pad and a gap is provided between the silica gel pad and the silica gel pad. 2. A fast sampler without dead volume according to claim 1, characterized in that: the width of the gap is set to 1-20mm. 3. A fast sampler without dead volume according to claim 1, characterized in that: the isolation plate is horizontally arranged in the inner cavity of the tee pipe where the sampling port is located. 4. A fast sampler without dead volume according to claim 3, characterized in that: the isolation plate is arranged on the central axis of the sampling port. 5. A fast sampler without dead volume according to claim 4, characterized in that: said sampling cover is opened with a sampling hole. 6. A quick sampler without dead volume according to claim 5, characterized in that: said sampling hole is deviated from the center of said sampling cover. 7. A fast sampler without dead volume according to claim 1, characterized in that: the drain port is connected to the drain pipe through a control valve. 8. A quick sampler without dead volume according to claim 1, characterized in that: said sample inlet is connected with a reaction kettle storing the sample liquid through a control valve. 9. A fast sampler without dead volume according to claim 1, characterized in that: said sample inlet is connected with a quick connector.