Sample treatment device for furfural content detection in insulating oil

Abstract

The utility model relates to the technical field of furfural detection in insulating oil, in particular to a sample processing device for furfural content detection in insulating oil, which comprises an oscillation table, a centrifugal table and a sample table which are sequentially arranged at intervals from left to right, and the oscillation table comprises a first tray, a first rotary table and an oscillator which are sequentially arranged from top to bottom. The sample processing device is reasonable and compact in structure and convenient to use, and by arranging the oscillation table, the centrifugal table and the grabbing mechanism between the oscillation table and the centrifugal table, a sample processing container subjected to oscillation extraction on the first tray of the oscillation table can be transferred into the second placing groove of the second tray of the centrifugal table; through the arrangement of the centrifugal table, the sample table and the pipetting mechanism between the centrifugal table and the sample table, upper-layer centrifugate in a sample treatment container centrifuged by the centrifugal table can be conveyed into a sample to-be-detected container of a third tray of the sample table, and the whole sample pretreatment process is efficient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of furfural detection in insulating oil, and is a sample processing device for detecting furfural content in insulating oil. Background Art

[0002] During long-term operation of transformers, due to the effects of oxygen, temperature, moisture, strong and weak electric fields and metal catalysts, the internal insulation paper ages, greatly reducing the insulation performance of the transformer. The aging of insulation paper is the degradation of cellulose in the insulation paper to form a variety of small molecular compounds, among which furfural is the most important characteristic liquid molecule. By analyzing the furfural content in the insulating oil, the aging degree of the internal insulation of the transformer can be diagnosed.

[0003] At present, the laboratory uses high performance liquid chromatography to detect the furfural content in insulating oil, but there are problems such as complicated pre-treatment process of oil samples and errors caused by human operation. In addition, the pre-treatment part also contains methanol, a volatile and toxic chemical, which threatens the health of operators. Summary of the invention

[0004] The utility model provides a sample processing device for detecting furfural content in insulating oil, which overcomes the deficiencies of the prior art and can effectively solve the problems of human error in the prior oil sample pre-processing process and harm to human body caused by methanol solvent.

[0005] The technical scheme of the utility model is achieved through the following measures: a sample processing device for detecting furfural content in insulating oil comprises an oscillating table, a centrifugal table and a sample table which are arranged in sequence from left to right, the oscillating table comprises a first tray, a first turntable and an oscillator which are arranged in sequence from top to bottom, the centrifugal table comprises a second tray, a second turntable and a centrifuge which are arranged in sequence from top to bottom, the sample table comprises a third tray, a third turntable and a sample rack which are arranged in sequence from top to bottom, at least four first placement grooves are evenly distributed along the circumference on the first tray, at least four second placement grooves are evenly distributed along the circumference on the second tray, at least four third placement grooves are evenly distributed along the circumference on the third tray, a sample processing container is arranged in the first placement groove, a sample container to be tested is arranged in the third placement groove, a gripping mechanism is arranged between the oscillating table and the centrifugal table, the gripping mechanism can move the sample processing container in the first placement groove to the second placement groove, a liquid transfer mechanism is arranged between the centrifugal table and the sample table, the liquid transfer mechanism can transfer the liquid in the sample processing container to the sample container to be tested.

[0006] The following are further optimizations and / or improvements to the above utility model technical solution:

[0007] The grabbing mechanism comprises a first movable arm which can rotate in the horizontal direction and move up and down in the vertical direction. A container grabber is arranged on the base of the first movable arm. The first tray and the second tray are arranged within the travel range of the first movable arm.

[0008] The above-mentioned pipetting mechanism includes a second movable arm that rotates in the horizontal direction and moves up and down in the vertical direction. The second movable arm is provided with a pipetting pipeline. The left inlet end of the pipetting pipeline is fixedly connected to the liquid inlet pipeline, and the right outlet end of the pipetting pipeline is fixedly connected to the liquid outlet pipeline. The second tray and the third tray are arranged within the travel range of the second movable arm. A cleaning tank and a waste liquid tank are also arranged within the travel range of the second movable arm.

[0009] The above also includes a control module, which is respectively connected to the first turntable, the second turntable, the third turntable, the oscillator, the centrifuge, the grabbing mechanism and the pipetting mechanism.

[0010] The above also includes a methanol raw material tank, the outlet of which is fixedly connected with a methanol feed pipeline, and the outlet end of the methanol feed pipeline is located above the sample processing container in the first placement tank.

[0011] A first electrically controlled valve is fixedly installed on the above-mentioned methanol feed pipeline, a first flow controller is fixedly installed on the methanol feed pipeline between the first electrically controlled valve and the methanol raw material tank, and a first peristaltic pump is fixedly installed on the methanol feed pipeline between the first flow controller and the methanol raw material tank.

[0012] The above-mentioned liquid outlet pipeline is provided with a second electric-controlled valve, the liquid inlet pipeline is provided with a second peristaltic pump, and a second flow controller is fixedly installed on the liquid inlet pipeline between the second peristaltic pump and the pipette line.

[0013] The utility model has a reasonable and compact structure and is easy to use. By arranging an oscillating table, a centrifugal table and a grabbing mechanism therebetween, the sample processing container on the first tray of the oscillating table after oscillation extraction can be transferred to the second placement slot on the second tray of the centrifugal table. By arranging the centrifugal table, the sample table and the liquid transfer mechanism therebetween, the upper layer of centrifugal liquid in the sample processing container on the centrifugal table after centrifugation can be transferred to the sample container to be tested on the third tray of the sample table. The entire sample pre-treatment process is efficient and fast, and the problem of errors caused by human operation and harm to personnel caused by methanol solvent is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0015] Attached Figure 2 For attachment Figure 1 Schematic diagram of the top view structure.

[0016] Attached Figure 1The codes in are: 1 is the first tray, 2 is the first turntable, 3 is the oscillator, 4 is the second tray, 5 is the second turntable, 6 is the centrifuge, 7 is the third tray, 8 is the third turntable, 9 is the sample rack, 10 is the first placement slot, 11 is the second placement slot, 12 is the third placement slot, 13 is the sample processing container, 14 is the sample container to be tested, 15 is the first moving arm, 16 is the container grabber, 17 is the second moving arm, 18 is the pipetting line, 19 is the liquid inlet line, 20 is the liquid outlet line, 21 is the cleaning tank, 22 is the waste liquid tank, 23 is the methanol raw material tank, 24 is the methanol feed line, 25 is the first electric control valve, 26 is the first flow controller, 27 is the first peristaltic pump, 28 is the second electric control valve, 29 is the second flow controller, and 30 is the second peristaltic pump. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0018] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art. For example, an oscillator and a centrifuge are all the equipment known and used in the art.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0020] The present invention is further described below in conjunction with the embodiments and drawings:

[0021] Embodiment 1: As attached Figure 1 , 2As shown, the sample processing device for detecting furfural content in insulating oil comprises an oscillating table, a centrifugal table and a sample table which are arranged in sequence from left to right. The oscillating table comprises a first tray 1, a first turntable 2 and an oscillator 3 which are arranged in sequence from top to bottom. The centrifugal table comprises a second tray 4, a second turntable 5 and a centrifuge 6 which are arranged in sequence from top to bottom. The sample table comprises a third tray 7, a third turntable 8 and a sample rack 9 which are arranged in sequence from top to bottom. The first tray 1 has at least four first placement slots 10 evenly spaced along the circumference. The second tray 4 has at least four first placement slots 10 evenly spaced along the circumference. There are at least four second placement slots 11, and at least four third placement slots 12 are evenly spaced along the circumference on the third tray 7. A sample processing container 13 is arranged in the first placement slot 10, and a sample test container 14 is arranged in the third placement slot 12. A grabbing mechanism is arranged between the oscillating table and the centrifugal table, and the grabbing mechanism can move the sample processing container 13 in the first placement slot 10 to the second placement slot 11. A pipetting mechanism is arranged between the centrifugal table and the sample table, and the pipetting mechanism can transfer the liquid in the sample processing container 13 to the sample test container 14.

[0022] The utility model can realize the transfer of the sample processing container 13 after oscillation extraction on the first tray 1 of the oscillation table to the second placement slot 11 of the second tray 4 of the centrifuge table by arranging an oscillating table, a centrifuge table and a grasping mechanism therebetween; and can realize the upper layer of centrifuged liquid in the sample processing container 13 after centrifugation on the centrifuge table to the sample container 14 to be tested on the third tray 7 of the sample table by arranging the centrifuge table, the sample table and the liquid transfer mechanism therebetween. The whole sample pre-treatment process is efficient and fast, and the problem of errors caused by human operation and harm to personnel caused by methanol solvent is effectively solved.

[0023] According to actual needs, the above-mentioned sample processing device for detecting furfural content in insulating oil can be further optimized and / or improved:

[0024] Embodiment 2: It is different from Embodiment 1 in that: Figure 1 , 2 As shown, the grabbing mechanism includes a first moving arm 15 that can rotate in the horizontal direction and move up and down in the vertical direction. A container grabber 16 is provided on the base of the first moving arm 15. The first tray 1 and the second tray 4 are arranged within the travel range of the first moving arm 15. As required, the first moving arm 15 is a known retractable and rotatable moving arm; the container grabber 16 is a known device that can grab or clamp test tubes, flasks and other containers. During use, the sample processing container 13 after oscillation extraction at the three o'clock position of the first tray 1 is transferred to the second placement slot 11 at the nine o'clock position of the second tray 4 by controlling the grabbing mechanism to rise, fall and rotate.

[0025] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 , 2 As shown, the liquid transfer mechanism includes a second movable arm 17 that rotates in the horizontal direction and moves up and down in the vertical direction. The second movable arm 17 is provided with a liquid transfer line 18. The left inlet end of the liquid transfer line 18 is fixedly connected to a liquid inlet line 19, and the right outlet end of the liquid transfer line 18 is fixedly connected to a liquid outlet line 20. The second tray 4 and the third tray 7 are arranged within the travel range of the second movable arm 17. A cleaning tank 21 and a waste liquid tank 22 are also arranged within the travel range of the second movable arm 17. As required, the second movable arm 17 is a known retractable and rotatable movable arm. During use, the upper centrifuged liquid in the sample processing container 13 at the three o'clock position of the second tray 4 is delivered to the sample test container 14 at the nine o'clock position of the third tray 7 by controlling the liquid transfer mechanism to rise and fall; then, the liquid transfer mechanism is controlled to rotate so that the liquid inlet line 19 extends into the cleaning tank 21 (the cleaning solvent in the cleaning tank 21 is methanol), and the liquid outlet line 20 extends into the waste liquid tank 22, thereby completing the cleaning of the sampling pipeline (liquid inlet line 19, liquid transfer line 18 and liquid outlet line 20).

[0026] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1 , 2 As shown, it also includes a control module, which is connected to the first turntable 2, the second turntable 5, the third turntable 8, the oscillator 3, the centrifuge 6, the grabbing mechanism and the pipetting mechanism. Through such a setting, sample pre-processing can be automatically controlled.

[0027] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 , 2 As shown, it also includes a methanol raw material tank 23, and a methanol feed pipeline 24 is fixedly connected to the outlet of the methanol raw material tank 23, and the outlet end of the methanol feed pipeline 24 is located above the sample processing container 13 in the first placement tank 10. During use, the insulating oil to be tested in the sample processing container 13 is mixed with methanol for oscillation extraction, and the oscillation extraction time is 30 minutes.

[0028] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 , 2As shown, a first electric control valve 25 is fixedly installed on the methanol feed pipeline 24, a first flow controller 26 is fixedly installed on the methanol feed pipeline 24 between the first electric control valve 25 and the methanol raw material tank 23, and a first peristaltic pump 27 is fixedly installed on the methanol feed pipeline 24 between the first flow controller 26 and the methanol raw material tank 23. During use, the methanol in the methanol raw material tank 23 is pumped out by the first peristaltic pump 27, and a certain amount of methanol is metered by the first flow controller 26 and sent to the sample processing container 13 of the first tray 1, so that the insulating oil in the sample processing container 13 is mixed with methanol for extraction.

[0029] Embodiment 7: It differs from Embodiments 1 to 6 in that: Figure 1 , 2 As shown, the liquid outlet pipeline 20 is provided with a second electric control valve 28, the liquid inlet pipeline 19 is provided with a second peristaltic pump 30, and the liquid inlet pipeline 19 between the second peristaltic pump 30 and the pipetting pipeline 18 is fixedly installed with a second flow controller 29. During use, the sampling process: the upper centrifuge liquid in the sample processing container 13 is pumped out by the second peristaltic pump 30, and a certain amount is metered by the first flow controller 26 and then sent to the sample container 14; the cleaning process: the pipetting mechanism is controlled to rotate 90 degrees, so that the liquid inlet pipeline 19 extends into the cleaning tank 21 (the cleaning solvent in the cleaning tank 21 is methanol), and the liquid outlet pipeline 20 extends into the waste liquid tank 22, the second peristaltic pump 30 is started, and the first flow controller 26 measures a certain amount of methanol in the cleaning tank 21 to clean the liquid inlet pipeline 19, the pipetting pipeline 18 and the liquid outlet pipeline 20 and then sends them to the waste liquid tank 22, so as to avoid interference from the previous sample when the next sample is sucked.

[0030] According to the needs, the control module can be a DCS controller, and its model can be a CS3000 controller produced by Yokogawa Corporation of Japan. The first turntable 2, the second turntable 5 and the third turntable 8 are electric rotating turntables.

[0031] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0032] The steps of using the embodiment of the utility model are as follows:

[0033] First, the four sample processing containers 13 are numbered, and a certain amount of insulating oil samples are taken and placed in the four sample processing containers 13 respectively. Then, the four sample processing containers 13 are placed in each first placement slot 10 of the first tray 1 respectively, and the methanol in the methanol raw material tank 23 is pumped out by the first peristaltic pump 27 and a certain amount of methanol is measured by the first flow controller 26 and sent to the sample processing container 13 at the 12 o'clock position of the first tray 1. Then, the first turntable 2 rotates 90 degrees clockwise, and a certain amount of methanol is added to each sample processing container 13 in turn. After the addition is completed, the oscillator 3 is started to oscillate for 30 minutes to complete the oscillation extraction;

[0034] Second, the control module controls the grabbing mechanism so that the first moving arm 15 descends and the container grabber 16 grabs the sample processing container 13 at the three o'clock position of the first tray 1. After lifting and rotating 180 degrees, the sample processing container 13 is placed in the second placement slot 11 at the nine o'clock position of the second tray 4. Then, the first turntable 2 and the second turntable 5 are both rotated 90 degrees clockwise, and the second step is repeated until the sample processing containers 13 on the first tray 1 can be transferred to the second tray 4. After the transfer is completed, the centrifuge 6 is started for centrifugal separation for 5 minutes to complete the centrifugation.

[0035] Third, the four sample containers 14 are numbered, and the pipetting mechanism is controlled by the control module to make the second moving arm 17 descend. At this time, the liquid inlet line 19 extends to the sample processing container 13 at the three o'clock position of the second tray 4, and the liquid outlet line 20 extends to the sample container 14 at the nine o'clock position of the third tray 7. The second peristaltic pump is started to pump out the upper centrifugal liquid in the sample processing container 13 and deliver it to the sample container 14 after a certain amount is measured by the first flow controller 26;

[0036] Fourth, before starting to transfer the next sample, the sampling pipeline (liquid inlet pipeline 19, liquid transfer pipeline 18 and liquid outlet pipeline 20) needs to be cleaned, specifically, the second movable arm 17 is controlled to rise and rotate 90 degrees clockwise, and then the second movable arm 17 is controlled to descend. At this time, the liquid inlet pipeline 19 extends into the cleaning tank 21 (the cleaning solvent in the cleaning tank 21 is methanol), and the liquid outlet pipeline 20 extends into the waste liquid tank 22. The second peristaltic pump 30 is started, and the first flow controller 26 measures the methanol in the cleaning tank 21 to flush the liquid inlet pipeline 19, the liquid transfer pipeline 18 and the liquid outlet pipeline 20 and then sends them to the waste liquid tank 22, completing the cleaning of the sampling pipeline (liquid inlet pipeline 19, the liquid transfer pipeline 18 and the liquid outlet pipeline 20). Then, the second movable arm 17 is controlled to rise and rotate 90 degrees counterclockwise to return to its original position.

[0037] Fifth, start removing the next sample, specifically, rotate the second turntable 5 and the third turntable 8 90 degrees, then control the second movable arm 17 to descend, and repeat the third step until the upper centrifuged liquid in the four sample processing containers 13 in the second tray 4 is transferred to the sample test containers 14 in the third tray 7, completing the sample removal, and sending the test samples in the sample test containers 14 to subsequent instruments for testing.

Claims

1. A sample processing device for detecting furfural content in insulating oil, characterized in that The invention comprises an oscillating table, a centrifugal table and a sample table which are arranged in sequence from left to right. The oscillating table comprises a first tray, a first turntable and an oscillator which are arranged in sequence from top to bottom. The centrifugal table comprises a second tray, a second turntable and a centrifuge which are arranged in sequence from top to bottom. The sample table comprises a third tray, a third turntable and a sample rack which are arranged in sequence from top to bottom. At least four first placement grooves are evenly distributed along the circumference on the first tray, at least four second placement grooves are evenly distributed along the circumference on the second tray, at least four third placement grooves are evenly distributed along the circumference on the third tray, a sample processing container is arranged in the first placement groove, a sample container to be tested is arranged in the third placement groove, a gripping mechanism is arranged between the oscillating table and the centrifugal table, the gripping mechanism can move the sample processing container in the first placement groove to the second placement groove, and a liquid transfer mechanism is arranged between the centrifugal table and the sample table, the liquid transfer mechanism can transfer the liquid in the sample processing container to the sample container to be tested.

2. The sample processing device for detecting furfural content in insulating oil according to claim 1, characterized in that The grabbing mechanism comprises a first movable arm which can rotate in the horizontal direction and move up and down in the vertical direction. A container grabber is arranged on the base of the first movable arm. The first tray and the second tray are arranged within the travel range of the first movable arm.

3. The sample processing device for detecting furfural content in insulating oil according to claim 1 or 2, characterized in that The pipetting mechanism includes a second movable arm that rotates in the horizontal direction and moves up and down in the vertical direction. The second movable arm is provided with a pipetting pipeline. The left inlet end of the pipetting pipeline is fixedly connected to the liquid inlet pipeline, and the right outlet end of the pipetting pipeline is fixedly connected to the liquid outlet pipeline. The second tray and the third tray are arranged within the travel range of the second movable arm. A cleaning tank and a waste liquid tank are also arranged within the travel range of the second movable arm.

4. The sample processing device for detecting furfural content in insulating oil according to claim 1 or 2, characterized in that It also includes a control module, which is respectively connected to the first turntable, the second turntable, the third turntable, the oscillator, the centrifuge, the grabbing mechanism and the pipetting mechanism.

5. The sample processing device for detecting furfural content in insulating oil according to claim 3, characterized in that It also includes a control module, which is respectively connected to the first turntable, the second turntable, the third turntable, the oscillator, the centrifuge, the grabbing mechanism and the pipetting mechanism.

6. The sample processing device for detecting furfural content in insulating oil according to claim 1, 2 or 5, characterized in that It also includes a methanol raw material tank, the outlet of which is fixedly connected with a methanol feed pipeline, and the outlet end of the methanol feed pipeline is located above the sample processing container in the first placement tank.

7. The sample processing device for detecting furfural content in insulating oil according to claim 3, characterized in that It also includes a methanol raw material tank, the outlet of which is fixedly connected with a methanol feed pipeline, and the outlet end of the methanol feed pipeline is located above the sample processing container in the first placement tank.

8. The sample processing device for detecting furfural content in insulating oil according to claim 4, characterized in that It also includes a methanol raw material tank, the outlet of which is fixedly connected with a methanol feed pipeline, and the outlet end of the methanol feed pipeline is located above the sample processing container in the first placement tank.

9. The sample processing device for detecting furfural content in insulating oil according to claim 6, characterized in that A first electric-controlled valve is fixedly installed on the methanol feed pipeline, a first flow controller is fixedly installed on the methanol feed pipeline between the first electric-controlled valve and the methanol raw material tank, and a first peristaltic pump is fixedly installed on the methanol feed pipeline between the first flow controller and the methanol raw material tank.

10. The sample processing device for detecting furfural content in insulating oil according to claim 3, characterized in that A second electric-controlled valve is arranged on the liquid outlet pipeline, a second peristaltic pump is arranged on the liquid inlet pipeline, and a second flow controller is fixedly installed on the liquid inlet pipeline between the second peristaltic pump and the pipette line.

Images