CN104913952A - Glass syringe seal sampling auxiliary joint device used for insulating oil gas chromatography - Google Patents

Abstract

A glass syringe sealing sampling auxiliary joint device for insulating oil gas chromatographic analysis, the glass syringe sealing sampling includes a glass syringe A containing a sampling detection gas and a glass syringe B with a sampling needle, the A glass syringe The glass syringe is equipped with a sampling auxiliary joint that can be inserted from the head of the glass syringe A and plugged into the glass syringe A. The side end of the auxiliary sampling joint is provided with a funnel-shaped needle guide, and the funnel-shaped needle guides The rubber cap on the head of the syringe and the A glass syringe can be docked and clamped after being inserted and positioned; the sampling auxiliary joint includes a joint bracket that is in contact with the A glass syringe and realizes the fixing effect, and the two sides of the joint bracket are respectively opened There is a window that does not affect the observation line of sight when sampling; it has the characteristics of simple structure, convenient and reliable use, can improve the work efficiency of chromatographic analysis of dissolved gas in oil, and solve the problem of smooth gas transfer between syringes.

Description

A glass syringe sealed sampling auxiliary joint device for insulating oil gas chromatographic analysis

technical field

The invention relates to a glass syringe sealing sampling auxiliary joint device used for gas chromatographic analysis of insulating oil, and belongs to the technical field of gas chromatographic analysis of insulating oil of power transformers.

Background technique

Due to the design, manufacture, quality and operation of large power transformers, current transformers and other equipment, vicious accidents and failures of these equipment occur from time to time, seriously affecting the safe and stable operation of the power grid. In order to ensure the safe operation of transformers and other equipment and even the power grid, many different monitoring methods have been developed at home and abroad, among which gas chromatography is used to detect the content of various dissolved gases in insulating oil, so as to judge the type of internal faults of oil-filled electrical equipment and severity are most effective.

Gas chromatography is a chromatographic technique for separating and analyzing compounds that are easy to volatilize without decomposition in organic chemistry. It uses the difference in the distribution of the components to be separated between the mobile phase and the stationary phase to separate And calculate the content of gas components to judge the internal failure of oil-filled equipment. In the analysis, glass syringes are frequently used to seal the sampling joints, but when the gas is transferred between the glass syringes, because the surface of the sampling sealing joints, that is, the rubber cap is smooth and hard, the needle slips at the joints and cannot be inserted into the glass syringes or is misplaced, resulting in Sampling failure and sample contamination are currently only solved by manual experience in China.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a simple structure, convenient and reliable use, can improve the work efficiency of dissolved gas chromatographic analysis in oil, and solve the problem of smooth transfer of gas between injectors for insulating oil-gas phase Chromatographic glass syringe sealed sampling auxiliary connector device.

The object of the present invention is accomplished through the following technical scheme, a glass syringe sealing sampling auxiliary joint device for gas chromatography analysis of insulating oil, and the glass syringe sealing sampling includes a glass syringe containing a sampling detection gas and A B glass syringe with a sampling needle, the A glass syringe is equipped with a sampling auxiliary joint that can be inserted from the head of the A glass syringe and plugged into the A glass syringe, and the side end of the sampling auxiliary joint is provided with a funnel shaped needle guide, and the funnel-shaped needle guide and the A-glass syringe head rubber cap can be docked and clamped after insertion and positioning.

The sampling auxiliary joint of the present invention includes a joint bracket that is in contact with the A glass syringe and realizes the fixing effect. There are windows on both sides of the joint bracket that do not affect the observation line of sight when sampling.

In order to overcome the defects of the prior art and improve the working efficiency of chromatographic analysis of dissolved gas in oil, the present invention specially manufactures a glass syringe sealed sampling auxiliary joint device, and specially designs the needle insertion point to prevent the needle from slipping or inserting deviation. The main part of the sampling auxiliary joint is a funnel-shaped guide, that is, a needle guide, which is concentric with the rubber cap (plug) of the glass syringe, and fixed on the front end of the glass syringe through a resin joint bracket to ensure that the needle is inserted into the syringe vertically when transferring gas. Do not touch the inner wall of the syringe.

In the gas chromatographic analysis, the production of the sealed sampling auxiliary joint is completed, and the phenomenon of needle slipping or insertion deviation in the oil chromatographic analysis is eliminated, and the sampling failure and sample contamination caused by the deviation of the needle do not occur, and the sample is transferred safely; through the development of gas chromatography In the chromatographic analysis, the glass syringe seals the sampling auxiliary joint, which improves the work efficiency of the chromatographic analysis of dissolved gas in oil; improves the accuracy of the test measurement, and provides real and effective data for the safe and reliable operation of the power grid; at the same time, the development of the equipment reduces the sampling needle, The loss of the rubber cap saves the equipment cost for the enterprise.

The invention has the characteristics of simple structure, convenient and reliable use, can improve the working efficiency of chromatographic analysis of dissolved gas in oil, solve the problem of smooth transfer of gas between injectors, and the like.

Description of drawings

Fig. 1 is a schematic diagram of the use structure of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings: As shown in Figure 1, a glass syringe sealing sampling auxiliary joint device for insulating oil gas chromatography analysis according to the present invention, the glass syringe sealing sampling includes an internal A glass syringe 1 containing a sampling detection gas and a glass syringe 3 with a sampling needle 2. The glass syringe 1 is equipped with a sampling needle that can be inserted from the head of the glass syringe A and inserted into the glass syringe 1. Auxiliary joint 4, the outer end of the sampling auxiliary joint 4 is provided with a funnel-shaped needle guide 5, and the funnel-shaped needle guide 5 and the rubber cap 6 at the head of the A glass syringe 1 can realize Butt and snap.

As shown in the figure, the sampling auxiliary joint 4 also includes a joint bracket 7 that is in contact with the A glass syringe 1 and realizes the fixing effect. There are windows on both sides of the joint bracket that do not affect the observation line of sight during sampling.

Example: A 100ml glass syringe 1 of A is inserted into the sampling auxiliary joint 4, and the glass syringe 1 of A is rotated so that the rubber sealing cap 6 on the head of the syringe and the auxiliary joint 4 are firmly locked, so that the funnel-shaped needle guide 5 and the rubber sealing cap 6, A The glass syringe heads are on the same vertical line. Then use the double-ended needle 2 and insert it from the guide 5 to transfer the sample detection gas (balance gas) in the A glass syringe 1 to the 5ml B glass syringe for chromatographic analysis.

Claims (2)

1. A glass syringe sealing sampling auxiliary joint device for insulating oil gas chromatographic analysis, said glass syringe sealing sampling includes a glass syringe containing sampling detection gas and a glass syringe B with a sampling needle, its characteristics The A glass syringe is equipped with a sampling auxiliary joint that can be inserted from the head of the A glass syringe and plugged into the A glass syringe, the side end of the sampling auxiliary joint is provided with a funnel-shaped needle guide, and the The funnel-shaped needle guide and the rubber cap of the A glass syringe head can be docked and clamped after being inserted and positioned. 2. The glass syringe sealing sampling auxiliary joint device for gas chromatographic analysis of insulating oil according to claim 1, characterized in that said sampling auxiliary joint includes a joint bracket that is in contact with A glass syringe and realizes a fixed action, and said There are windows on both sides of the joint bracket that do not affect the observation line of sight when sampling.