CN204287130U - A kind of device improving vacuum extractor sample introduction efficiency - Google Patents

Abstract

The utility model discloses a device for improving the sampling efficiency of a vacuum extractor, which comprises a bracket, a glass syringe, an aqueduct, and a flow limiter. Two layers of parallel rectangular mounting plates are fixed on the bracket, and the glass syringe is installed on two On the first-layer mounting plate, after the water guide is installed with a flow limiter, it is connected to the lower port of the glass syringe. The two-layer mounting plates are coaxially made with a glass syringe limit hole. The diameter of the limit hole on the upper mounting plate should be larger than the diameter of the glass syringe. The diameter of the limit hole of the lower mounting plate should be smaller than the diameter of the glass syringe, but should be larger than the diameter of the lower opening of the glass syringe. The device of the utility model is simple and efficient, and can accommodate the oil samples or reagents used in solid phase extraction at one time, ensuring the completion of one-time operation of the oil samples or reagents; the flow limiter is installed on the guide tube, which can effectively regulate the solid phase extraction The flow rate of the oil sample or reagent used to control the amount flowing into the solid phase extraction column.

Description

A device for improving the sampling efficiency of a vacuum extractor

technical field

The utility model relates to a device for extracting furfural in transformer oil, in particular to a device for improving the sampling efficiency of a vacuum extractor.

Background technique

Furfural in transformer oil is a major compound produced by the degradation of solid insulating paper in transformers. At present, high-performance liquid chromatography with high operability is widely used at home and abroad to detect furfural content in oil. By testing the furfural content in oil, the aging degree of transformer paper insulation can be evaluated. However, using high-performance liquid chromatography to detect furfural content in oil Previously, furfural was first extracted from transformer oil samples. Solid phase extraction is an extraction method that can efficiently and quickly extract furfural in transformer oil, which has emerged in recent years. When furfural in transformer oil is extracted by solid phase extraction, the amount of oil sample is generally not less than 10ml, and a large amount of reagents are needed, such as in the flushing process, the n-hexane reagent used is generally more than 20mL. The key component in the solid phase extraction method, the solid phase extraction column, generally only has a capacity of 5-6 mL. Therefore, when a large amount of oil samples or reagents are required to flow through the solid-phase extraction column, only 5-6 mL can be introduced at a time. The oil sample required two passes to get the oil sample all through the SPE column, while flushing the reagents required four passes. Such an operation is not only complicated and time-consuming, but also requires a high degree of concentration of the operator, and is prone to operational errors and wrong extraction results.

Contents of the invention

The purpose of this utility model is to overcome above-mentioned deficiencies in prior art, provide a kind of device that improves the sampling efficiency of vacuum extractor, not only can complete the operation of oil sample or reagent at one time, and can adjust the flow velocity of oil sample or reagent.

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

A device for improving the sampling efficiency of a vacuum extractor, comprising a bracket, an upper mounting plate, a lower mounting plate, a glass syringe, a flow restrictor, and a diversion hose. The upper mounting plate is formed with a syringe limit hole, and the lower mounting plate A syringe limit hole is made, the glass syringe passes through the limit hole of the upper mounting plate, and the lower port is stuck at the limit hole of the lower mounting plate, and the diversion hose is covered with the flow limiter, and connected to the lower port of the glass syringe.

Glass syringes eliminate the need for needles and plungers.

The aqueduct is a squeezable flexible plastic tube with an inner diameter matching the lower opening of the glass syringe.

The flow restrictor is matched with the aqueduct, which can effectively adjust the flow of the aqueduct.

There are two rows of coaxial syringe limiting holes on the two parallel mounting plates.

The limiting hole of the upper mounting plate should be smaller than the outer diameter of the glass syringe, so that the glass syringe can be placed freely.

The limit hole of the lower mounting plate should be smaller than the outer diameter of the glass syringe, but should be larger than the diameter of the lower opening of the glass syringe, and the glass syringe should be freely placed.

The distance between two layers of parallel mounting plates is easy to stabilize and fix the syringe after the syringe is installed.

The beneficial effects of the utility model are:

1. The device of the present utility model is simple and efficient. It includes a bracket. Two layers of parallel mounting plates are installed on the upper surface of the bracket. The glass syringe is installed on the two layers of mounting plate. The oil sample or reagent in the glass syringe can flow down naturally under the action of natural gravity. The capacity of the glass syringe is 20mL, which can hold the oil sample or reagent used in solid phase extraction at one time, ensuring the oil sample or reagent once. The sexual operation is completed;

2. A flow limiter is installed on the guide pipe of the reagent bottle cleaning device of the present invention, which can effectively adjust the flow of oil samples or reagents used in solid phase extraction to control the amount flowing into the solid phase extraction column.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Among them, 1. Bracket, 2. Upper mounting plate, 3. Limiting hole on the upper mounting plate, 4. Lower mounting plate, 5. Limiting hole on the lower mounting plate, 6. Glass syringe, 7. Under the glass syringe Mouth, 8. Restrictor, 9. Diversion hose. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

A device for improving the sampling efficiency of a vacuum extractor, as shown in Figure 1, including a bracket 1, an upper mounting plate 2, a lower mounting plate 4, a glass syringe 6 with a capacity of 20 mL, a flow restrictor 8, and a diversion hose 9 , the upper mounting plate 2 is formed with a syringe limit hole, the lower mounting plate 4 is formed with a syringe limit hole, the glass syringe 6 passes through the limit hole 3 of the upper mounting plate, and the lower opening is stuck in the limit hole of the lower mounting plate At position 5, after the diversion hose 9 covers the restrictor 8, it is connected to the lower port 7 of the glass syringe.

There are 6 limiting holes 3 in the upper mounting plate, and the hole diameter should be smaller than the outer diameter of the 20mL glass syringe, so that the 20mL glass syringe can be placed freely.

There are 6 limit holes in the lower mounting plate. The hole diameter should be smaller than the outer diameter of the 20mL glass syringe, but should be larger than the diameter of the lower opening of the 20mL glass syringe, and the 20mL glass syringe should be freely accessible.

The limiting holes 3 of the upper mounting plate and the limiting holes 5 of the lower mounting plate, the corresponding holes should be coaxial.

After the lower port 7 of the 20mL glass syringe and the 20mL glass syringe 6 are placed, the lower port is 5 cm lower than the lower interface of the lower mounting plate 4 .

The lower port 7 of the 20mL glass syringe and the diversion hose 9 should be matched, specifically, the diversion hose 9 is fastened to the outside of the lower port 7 of the glass syringe.

The flow limiter 8 and the diversion hose 9 should be matched, specifically the flow limiter 8 can effectively control the flow rate and flow rate of the diversion hose 9, and the flow limiter 8 can realize the flow rate of the diversion hose 9 from 0 To the maximum value of flow hose 9 own flow.

The device of the utility model is simple and efficient. It includes a bracket. Two layers of parallel mounting plates are installed on the upper surface of the bracket. The glass syringe is installed on the two layers of mounting plate. , under the action of natural gravity, the oil sample or reagent in the glass syringe can flow down naturally. The capacity of the glass syringe is 20mL, which can hold the oil sample or reagent used in solid phase extraction at one time, ensuring the one-time operation of the oil sample or reagent Finish;

A flow limiter is installed on the guide pipe of the reagent bottle cleaning device of the utility model, which can effectively adjust the flow of oil samples or reagents used in solid phase extraction, so as to control the amount flowing into the solid phase extraction column.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (5)

1. one kind is improved the device of vacuum extractor sample introduction efficiency, it is characterized in that, comprise support (1), upper strata installing plate (2), lower floor's installing plate (4), glass syringe (6), restrictor (8), stream guiding tube (9), (2) are shaped with syringe spacing hole to upper strata installing plate, (4) are shaped with syringe spacing hole to lower floor's installing plate, glass syringe (6) is by the spacing hole (3) of upper strata installing plate, end opening place is stuck in spacing hole (5) place of lower floor's installing plate, after stream guiding tube (9) overcoat restrictor (8), connect glass syringe end opening (7).

2. a kind of device improving vacuum extractor sample introduction efficiency according to claim 1, is characterized in that, the aperture of described upper strata installing plate spacing hole (3) should be greater than the overall diameter of glass syringe.

3. a kind of device improving vacuum extractor sample introduction efficiency according to claim 1, is characterized in that, the aperture of described lower floor's installing plate spacing hole (5) should be less than the overall diameter of glass syringe, but should be greater than the diameter of glass syringe end opening.

4. a kind of device improving vacuum extractor sample introduction efficiency according to claim 1, is characterized in that, the hole corresponding up and down of the spacing hole (5) of described upper strata installing plate spacing hole (3) and lower floor's installing plate should be coaxial.

5. a kind of device improving vacuum extractor sample introduction efficiency according to claim 1, is characterized in that, the fastening outside being set to glass syringe end opening (7) of described stream guiding tube (9).