Degassing and sampling device for oil chromatography test

Abstract

The utility model provides a degassing and sampling device for an oil chromatography test. The degassing and sampling device comprises a case, an oscillation degassing assembly, a gas inlet and collection assembly, a gas path linking assembly and a controller, a control panel is arranged on the front side surface of the upper case; the oscillation degassing assembly comprises a guide rail, an injector oscillation support, an injector, an injector piston rod electric push rod and a stepping motor. The air inlet and gas collection assembly comprises a needle seat lifting electric push rod, an air inlet and gas collection needle seat, an air pump assembly and an air inlet and gas collection needle head. And the gas path linking assembly is positioned outside the case and comprises an electromagnetic valve and a filter. The device has the advantages of being stable in carrier gas flow velocity, low in operation difficulty, time-saving and labor-saving, and can greatly improve the accuracy of oil chromatography test results when being matched with a chromatographic analyzer for use.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power oil detection, in particular to an oil chromatography test degassing sampling device. Background Art

[0002] In the detection of power equipment, the analysis of dissolved gases in insulating oil by gas chromatography can detect the latent faults in oil-filled electrical equipment as early as possible, which is an important means of transformer insulation detection. The gas chromatography analysis process is a physical separation analysis technology. The analysis procedure is to first separate the gas dissolved in the sampled transformer oil through a degassing device, inject it into the chromatograph, and flow through the chromatographic column under the promotion of the carrier gas. After the mixed gas is separated by the chromatographic column, it is detected by the identifier. In the prior art, the transformer oil needs to be manually injected with a syringe for carrier gas injection and sample gas transfer during and after degassing. As the injection system of the gas sample carrier, its air tightness, stability of the carrier gas flow rate and accuracy of the measured flow rate have a great influence on the chromatographic results. In order to ensure the accuracy of the test, the operator needs to have skilled technology and perform accurate operations within the specified time. Since the operation process uses a syringe, there are problems with the accuracy of the gas injection volume and the accuracy of the needle operation. Once the operation is unsuccessful, the gas sample is lost and the measurement result cannot be obtained, and the gas leakage causes damage to the personnel and tools. In order to ensure the stability of the sample, a single injection requires a lot of man-hours. If multiple tasks need to be completed repeatedly, it is easy to cause a decrease in measurement accuracy due to work fatigue, which will cause safety hazards in the test. Therefore, it is necessary to develop an oil chromatography test degassing injection device to solve the above technical problems. Summary of the invention

[0003] The technical problem solved by the utility model is to provide an oil chromatography test degassing sampling device, which has the advantages of stable carrier gas flow rate, low operation difficulty, time saving and labor saving, and can greatly improve the accuracy of oil chromatography test analysis results when used in conjunction with a chromatographic analyzer.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] An oil chromatography test degassing and sampling device, characterized in that it includes a chassis, an oscillating degassing component, an air intake and collection component, an air path connection component, and a controller; the chassis is divided into a bottom chassis and an upper chassis by a partition, the oscillating degassing component and the controller are located in the bottom chassis; the air intake and collection component is located in the upper chassis; a control panel is provided on the front side of the upper chassis; the oscillating degassing component includes a guide rail, a syringe oscillating bracket mounted on the guide rail, a plurality of syringes mounted on the syringe oscillating bracket, a syringe piston rod electric push rod and a stepper motor mounted at the bottom of the bottom chassis, the syringe oscillating bracket is mounted on the guide rail through a slide groove, and the stepper motor is connected to the syringe oscillating bracket by a synchronous belt and a transmission wheel assembly. The swing bracket is connected to drive the syringe oscillation bracket to move left and right along the guide rail; the air intake and gas collection component includes a needle seat lifting electric push rod fixed in the upper chassis, an air intake and gas collection needle tube seat installed on the needle seat lifting electric push rod, an air pump component connected to the air intake and gas collection needle tube seat through a pipeline, and an air intake and gas collection needle located at the bottom of the air intake and gas collection needle tube seat; the air path connection component is located outside the chassis, the air path connection component includes a solenoid valve and a filter, the filter is connected to the air pump component and the solenoid valve through pipelines, and the solenoid valve is connected to the chromatograph through a pipeline; the controller is connected to the control panel, the syringe piston rod electric push rod, the stepper motor, the needle seat lifting electric push rod, the air pump component, and the solenoid valve through a cable.

[0006] Furthermore, a plurality of photocoupler limiters are provided on the side of the bottom chassis, and the photocoupler limiters are connected to the controller cable for controlling the movement amplitude and the stop position of the syringe oscillation support.

[0007] Furthermore, a syringe protective rubber sleeve is provided at the contact portion between the syringe and the syringe oscillation support.

[0008] Furthermore, a syringe liquid level monitoring camera is provided on the side wall of the bottom chassis, and a liquid level display screen connected to the syringe liquid level monitoring camera line is provided on the upper part of the chassis. The syringe liquid level monitoring camera and the liquid level display screen are connected to the controller via cables.

[0009] Furthermore, the syringe piston rod electric push rod is located in the middle of the bottom chassis, the air intake and gas collection needle tube seat and the air intake and gas collection needle are located directly above the syringe piston rod electric push rod, and the syringe oscillation bracket moves on the guide rail to drive each syringe to move to the position directly above the syringe piston rod electric push rod to complete the gas collection and injection process.

[0010] The utility model has the following beneficial effects:

[0011] The utility model performs gas injection and degassing operations on the transformer oil sample in the syringe through an oscillating degassing component and an air inlet and gas collection component. The mechanized operation has a high degree of standardization, saves time and labor, can obtain pure and uniform test carrier gas with a stable flow rate, and improves the accuracy of oil chromatography test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front structural schematic diagram of the utility model.

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0015] Figure 4 It is a side structural schematic diagram of the utility model.

[0016] The corresponding component names in the figure are: 1 chassis; 2 controller; 3 control panel; 4 guide rail; 5 syringe oscillation bracket; 6 syringe; 7 syringe piston rod electric push rod; 8 stepper motor; 9 needle seat lifting electric push rod; 10 air intake and gas collection needle tube seat; 11 air pump assembly; 12 air intake and gas collection needle; 13 solenoid valve; 14 filter; 15 photocoupler limiter; 16 syringe protective rubber sleeve; 17 syringe liquid level monitoring camera; 18 liquid level display screen. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods, structures and features of the utility model are described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, the accompanying drawings are only provided for reference and explanation, and are not used to limit the utility model.

[0018] See also Figures 1 to 4As shown, an oil chromatography test degassing and sampling device comprises a chassis 1, an oscillating degassing component, an air intake and collection component, an air path connection component, and a controller 2; the chassis is divided into two parts, a bottom chassis and an upper chassis by a partition, the oscillating degassing component and the controller are located in the bottom chassis; the air intake and collection component is located in the upper chassis; a control panel 3 is provided on the front side of the upper chassis; the oscillating degassing component comprises a guide rail 4, a syringe oscillating bracket 5 mounted on the guide rail, a plurality of syringes 6 mounted on the syringe oscillating bracket, a syringe piston rod electric push rod 7 and a stepping motor 8 mounted at the bottom of the bottom chassis, the syringe oscillating bracket 5 is mounted on the guide rail 4 through a slide groove, and the stepping motor 8 is connected to the syringe oscillating bracket 5 by a synchronous belt and a transmission wheel assembly to drive the syringe The injector oscillation support moves left and right along the guide rail; the air intake and gas collection component includes a needle seat lifting electric push rod 9 fixed in the upper chassis, an air intake and gas collection needle tube seat 10 installed on the needle seat lifting electric push rod, an air pump component 11 connected to the air intake and gas collection needle tube seat through a pipeline, and an air intake and gas collection needle 12 located at the bottom of the air intake and gas collection needle tube seat; the air path connection component is located outside the chassis, and the air path connection component includes a solenoid valve 13 and a filter 14, the filter 14 is connected to the air pump group 11 and the solenoid valve 13 through a pipeline, and the solenoid valve 13 is connected to the chromatograph through a pipeline; the controller 2 is connected to the control panel 3, the injector piston rod electric push rod 7, the stepper motor 8, the needle seat lifting electric push rod 9, the air pump component 11, and the solenoid valve 13 through a cable. A plurality of optical coupler limiters 15 are provided on the side of the bottom chassis, and the optical coupler limiters are connected to the controller 2 by cable to control the movement amplitude and the stop position of the injector oscillation support. The contact part between the injector and the injector oscillation support is provided with an injector protective rubber sleeve 16. The side wall of the bottom chassis is provided with a syringe liquid level monitoring camera 17, and the upper part of the chassis is provided with a liquid level display screen 18 connected to the syringe liquid level monitoring camera line. The syringe liquid level monitoring camera and the liquid level display screen are connected to the controller through a cable. The syringe piston rod electric push rod 7 is located in the middle of the bottom chassis, the air intake and gas collection needle tube seat 10 and the air intake and gas collection needle 12 are located directly above the syringe piston rod electric push rod, and the syringe oscillation bracket 5 moves on the guide rail 4 to drive each syringe 6 to move to the position directly above the syringe piston rod electric push rod to complete the gas collection and injection process.

[0019] When the utility model is implemented, it can be connected with different types of chromatographs to complete the oil chromatography test. The gas circuit connection component is directly connected to the chromatograph, and the gas circuit connection component is connected to the internal air intake and gas collection component through a pipeline. The needle seat lifting electric push rod 9 of the air intake and gas collection component drives the air intake and gas collection needle tube seat 10 to move up and down, and controls the air intake and gas collection needle 12 to insert or leave the rubber plug on the upper part of the syringe 6, completing the process of filling the syringe 6 with gas or collecting gas. The controller controls the syringe oscillation support 5 to move on the guide rail 4, thereby driving each syringe 6 to move to the position directly above the syringe piston rod electric push rod to complete the gas filling and gas collection process; after the syringe 6 is filled with gas, the air intake and gas collection needle 12 leaves the syringe 6, and the stepper motor 8 and the synchronous belt and transmission wheel assembly drive the syringe oscillation support 5 to move left and right along the guide rail, thereby driving the syringe to achieve vibration degassing during the left and right movement. The controller 2 combines with the optical coupler limiter 15 to control the oscillation amplitude and oscillation distance of the syringe oscillation support 5. The syringe liquid level monitoring camera 17 takes real-time pictures of the liquid level information in the syringe 6 during the oscillation process, and feeds back to the liquid level display screen 18 for the test personnel to observe. After the oscillation is completed, the air intake and gas collection needle 12 is inserted into the rubber stopper on the upper part of the syringe 6 again to collect gas. At this time, the syringe piston rod electric push rod 7 pushes the piston rod at the bottom of the syringe 6 to move upward, and the gas in the syringe 6 tube body enters the chromatographic analyzer through the air pump assembly 11 and the gas path connection assembly to complete the detection process.

[0020] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil chromatography test degassing sampling device, characterized in that: The invention comprises a chassis, an oscillating degassing component, an air inlet and air collection component, an air path connection component and a controller; the chassis is divided into a bottom chassis and an upper chassis by a partition, the oscillating degassing component and the controller are located in the bottom chassis; the air inlet and air collection component is located in the upper chassis; a control panel is provided on the front side of the upper chassis; the oscillating degassing component comprises a guide rail, a syringe oscillating bracket mounted on the guide rail, a plurality of syringes mounted on the syringe oscillating bracket, a syringe piston rod electric push rod and a stepper motor mounted at the bottom of the bottom chassis, the syringe oscillating bracket is mounted on the guide rail through a slide groove, the stepper motor is connected to the syringe oscillating bracket by a synchronous belt and a transmission wheel assembly to drive the syringe The injector oscillation bracket moves left and right along the guide rail; the air intake and gas collection component includes a needle seat lifting electric push rod fixed in the upper chassis, an air intake and gas collection needle tube seat installed on the needle seat lifting electric push rod, an air pump component connected to the air intake and gas collection needle tube seat through a pipeline, and an air intake and gas collection needle located at the bottom of the air intake and gas collection needle tube seat; the air path connection component is located outside the chassis, and the air path connection component includes a solenoid valve and a filter, the filter is connected to the air pump component and the solenoid valve respectively through pipelines, and the solenoid valve is connected to the chromatograph through a pipeline; the controller is connected to the control panel, the syringe piston rod electric push rod, the stepper motor, the needle seat lifting electric push rod, the air pump component, and the solenoid valve through cables.

2. The oil chromatography test degassing sampling device according to claim 1, characterized in that: A plurality of photocoupler limiters are arranged on the side of the bottom chassis, and the photocoupler limiters are connected with the controller cable for controlling the movement amplitude and the stop position of the syringe oscillation support.

3. The oil chromatography test degassing sampling device according to claim 1, characterized in that: A syringe protective rubber sleeve is provided at the contact position between the syringe and the syringe oscillation support.

4. The oil chromatography test degassing sampling device according to claim 1, characterized in that: A syringe liquid level monitoring camera is arranged on the side wall of the bottom chassis, and a liquid level display screen connected to the syringe liquid level monitoring camera line is arranged on the upper part of the chassis. The syringe liquid level monitoring camera and the liquid level display screen are connected to the controller through cables.

5. The oil chromatography test degassing sampling device according to claim 1, characterized in that: The syringe piston rod electric push rod is located in the middle of the bottom chassis, the air intake and gas collection needle tube seat and the air intake and gas collection needle are located directly above the syringe piston rod electric push rod, and the syringe oscillation bracket moves on the guide rail to drive each syringe to move to the position directly above the syringe piston rod electric push rod to complete the gas collection and injection process.

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