CN112255044B - Portable step-by-step automatic oil taking device for oil chromatograph - Google Patents
Portable step-by-step automatic oil taking device for oil chromatograph Download PDFInfo
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- CN112255044B CN112255044B CN202011251157.3A CN202011251157A CN112255044B CN 112255044 B CN112255044 B CN 112255044B CN 202011251157 A CN202011251157 A CN 202011251157A CN 112255044 B CN112255044 B CN 112255044B
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- 238000000605 extraction Methods 0.000 claims abstract description 137
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 30
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 309
- 238000004140 cleaning Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- Life Sciences & Earth Sciences (AREA)
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- Chemical & Material Sciences (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a portable step-by-step automatic oil extraction device for oil chromatography, which comprises a box body and a controller, wherein a first cavity embedded with an injector is arranged in the box body, an oil extraction interface is arranged on the side wall of the box body, the oil extraction interface is connected with a first oil pipe sequentially provided with a first electromagnetic valve, an oil pump and a third electromagnetic valve, the other end of the first oil pipe is connected with a waste oil recovery assembly, the first oil pipe is communicated with the oil extraction injector through a second oil pipe provided with the third electromagnetic valve, one end of the second oil pipe is arranged between the oil pump and the second electromagnetic valve, a third oil pipe is communicated between the first oil pipe and the second oil pipe, one end of the third oil pipe is positioned between the third electromagnetic valve and the oil extraction injector, and the other end of the third oil pipe is positioned at a part between the first electromagnetic valve and the oil pump; the piston handle of the oil extraction injector is connected with a clamping piece which is slidingly connected in the first cavity and driven by the first power mechanism. The invention can realize the full-automatic oil extraction integrated function through the full-automatic control system and improve the field work efficiency.
Description
Technical Field
The invention relates to the technical field of electric power system insulation oil gas chromatographic analysis devices, in particular to a portable step-by-step automatic oil extraction device for oil chromatography.
Background
After the oil sample is obtained from the oil sampling port of the transformer body, experiments such as oil chromatographic analysis and the like are carried out on the oil sample, and are important bases for examining the running state of the transformer and finding out the fault cause after faults occur. At present, the oil chromatograph of the transformer is generally operated by hands, a worker needs to open an oil extraction valve before oil extraction, dead volume oil is discharged, then main transformer oil is used for repeatedly washing a needle cylinder for three times, oil extraction is carried out, air bubbles in the needle cylinder are required to be emptied and quantified to 40mL of oil volume after oil extraction, and finally a manual rubber cap is plugged manually to realize the sealing of a needle opening. The whole operation process is complicated, the efficiency is low, and meanwhile, if the quantitative volume of the oil sample is inaccurate, the air is not strictly introduced into the needle cylinder seal, so that the chromatographic analysis accuracy of the oil sample is reduced, and the equipment condition is misjudged.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the related art to a certain extent, and therefore, the invention provides a portable step-by-step automatic oil extraction device for oil chromatography, which can replace the traditional manual operation, realize the oil extraction integrated full-automatic function through a full-automatic control system, improve the field work efficiency, realize the standardized operation flow, simultaneously avoid air infiltration into a sampling needle cylinder, and improve the operation safety and convenience.
The technical scheme of the invention is realized as follows:
the portable step-by-step automatic oil extraction device for the oil chromatograph comprises a box body and a controller, wherein a first cavity is arranged in the box body, an oil extraction injector is embedded in the first cavity, an oil extraction interface is arranged on the side wall of the box body, one end of the oil extraction interface extends into the first cavity and is connected with a first oil pipe, the other end of the first oil pipe is connected with a waste oil recovery component, a first electromagnetic valve, an oil pump and a second electromagnetic valve are sequentially arranged on the first oil pipe, a second oil pipe is communicated with a part of the first oil pipe between the oil pump and the second electromagnetic valve, the other end of the second oil pipe is communicated with a connecting oil nozzle of the oil extraction injector, a third electromagnetic valve is arranged on the second oil pipe, a part of the second oil pipe between the third electromagnetic valve and the oil extraction injector is communicated with a third oil pipe, the other end of the third oil pipe is connected with a part of the first oil pipe between the first electromagnetic valve and the oil pump, and a fourth electromagnetic valve is arranged on the third oil pipe; the piston handle of the oil extraction injector is connected with a clamping piece, the clamping piece is connected in the first cavity in a sliding manner, and the clamping piece is driven to move through a first power mechanism; the first power mechanism, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the oil pump are all in signal connection with the controller.
Further, the first power mechanism comprises a screw rod arranged along the length direction of the oil extraction injector, one end of the screw rod is connected with a stepping motor for driving the screw rod to rotate, the screw rod is connected with a nut seat, and the clamping piece is connected to the nut seat.
Further, a sliding rail parallel to the screw rod is arranged below the screw rod, and the lower end of the nut seat is connected to the sliding rail in a sliding manner through a sliding block.
Further, the clamping piece comprises a first U-shaped piece, a second U-shaped piece and a connecting plate connected to the nut seat, the first U-shaped piece and the second U-shaped piece are oppositely arranged on the connecting plate, the first U-shaped piece is clamped on one side, facing the oil extraction injector, of the piston handle of the oil extraction injector, and the second U-shaped piece is positioned on one side, facing away from the oil extraction injector, of the piston handle of the oil extraction injector.
Further, one end of the oil extraction interface extending into the first cavity is further connected with a fourth oil pipe, the other end of the fourth oil pipe is communicated with a connecting oil nozzle of the oil extraction injector, and a fifth electromagnetic valve in signal connection with the controller is arranged on the fourth oil pipe.
Further, a second cavity is further formed in the box body, one end, away from the oil extraction interface, of the first oil pipe extends into the second cavity, and an oil extraction joint is arranged at one end, away from the oil extraction interface, of the first oil pipe; the waste oil recovery assembly is provided with a sealing bag, and the sealing bag is sleeved on the oil discharge joint.
Further, a second box door capable of being opened and closed is arranged at the opening of the second cavity, and a visible window is arranged at the position of the second box door corresponding to the sealed bag.
Further, a left limit switch is arranged in the first cavity, a mounting plate is arranged on one side, away from the oil extraction injector, of the left limit switch, the mounting plate is driven to lift by an electric telescopic rod, and a right limit switch is arranged on the mounting plate; the left limit switch, the right limit switch and the electric telescopic rod are in signal connection with the controller.
Further, the controller comprises a PLC and a display screen electrically connected with the PLC, the display screen is arranged on the outer surface of the box body, and a control button electrically connected with the PLC is further arranged on the outer surface of the box body.
Further, the oil extraction injector comprises a cylinder body and a piston rod arranged in the cylinder body, one end of the piston rod extends out of the cylinder body and is provided with the piston handle, and the connecting oil nozzle is arranged at one end of the cylinder body, which is far away from the piston handle; the connecting oil nozzle is detachably sleeved with a connector, one end of the connector, which is away from the connecting oil nozzle, is provided with an oil receiving port, the oil receiving port is communicated with the second oil pipe, one end, which is away from the connecting oil nozzle, inside the connector is provided with a sealing plug, the center of the sealing plug is provided with an oil inlet pipe, and the oil inlet pipe is communicated with the oil receiving port; an oil outlet is formed in the sealing plug, an oil outlet pipe is arranged at one end, close to the connecting oil nozzle, inside the connector, and the oil inlet pipe is communicated with the oil outlet pipe through the oil outlet; the oil outlet pipe is communicated with the connecting oil nozzle, and the sealing plug is sleeved with an elastic sleeve which covers the oil outlet hole.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a pipe loop formed by a first oil pipe and a second oil pipe is arranged in the box body, and meanwhile, the oil extraction injector is detachably embedded in the first cavity; when oil extraction is needed, the oil extraction injector is embedded in the first cavity, the oil nozzle connected with the oil extraction injector is communicated with the second oil pipe, the oil extraction interface is communicated with the oil tank of the transformer through a hose, then the controller is started, the controller firstly controls the first electromagnetic valve, the oil pump and the third electromagnetic valve to be started, meanwhile, the first power mechanism is controlled to start to drive the piston handle to move towards the direction far away from the oil extraction injector through the clamping piece, so that oil is conveyed into the oil extraction injector, after the oil conveyed into the oil extraction injector reaches a set amount, the oil is stopped, after a period of time, the controller controls the fourth electromagnetic valve, the oil pump and the second electromagnetic valve to be opened, and simultaneously controls the first power mechanism to start to drive the piston handle to move towards the direction close to the oil extraction injector through the clamping piece, so that the oil in the oil extraction injector is conveyed into the waste oil recovery assembly through the second oil pipe, the third oil pipe and the first oil pipe in sequence, the actions are repeated, and a cleaning function is realized; when the cleaning is finished, the controller controls the first electromagnetic valve, the oil pump and the third electromagnetic valve to be opened, and simultaneously controls the first power mechanism to start to drive the piston handle to move in a direction away from the oil extraction injector through the clamping piece; thus, oil in the transformer sequentially passes through the oil extraction interface, the first oil pipe and the second oil pipe and enters the oil extraction injector, and when the oil quantity in the oil extraction injector reaches a sampling set value, the control device stops to realize the acquisition work; then taking the oil extraction injector out of the first cavity and sending the oil extraction injector to a laboratory for experimental analysis; when the oil extraction injector is taken out and system oil extraction is needed, the oil extraction interface is disconnected from the oil tank of the transformer, and then the first electromagnetic valve, the oil pump and the second electromagnetic valve are started, so that oil in the pipe loop is discharged to the waste oil recovery component for recovery, and the oil in the pipe loop is prevented from affecting the detection result when the other transformer is subjected to sampling detection. The device can replace the traditional manual operation, realize the full-automatic function of cleaning and oil extraction integration, improve the field work efficiency, realize the standardized operation flow and improve the operation safety and convenience; the method can bring positive social benefits to enterprises, has good popularization of achievements and strong practicability, and can be effectively applied to the power system.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a front view, partially in section, of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of FIG. 1 at B;
FIG. 4 is a schematic perspective view of an embodiment of the present invention;
FIG. 5 is a schematic diagram of an assembly structure of an oil extraction injector and a connector according to an embodiment of the present invention;
fig. 6 is a schematic side view of a clip according to an embodiment of the present invention.
Reference numerals:
100 cases, 110 first cavities, 120 second cavities, 130 second doors, 140 visual windows, 150 grooves, 160 sealing plates and 170 first doors;
200 oil extraction injector, 210 connecting oil nozzle, 220 piston handle, 230 cylinder, 240 piston rod;
310 oil extraction interface, 320 first oil pipe, 321 first electromagnetic valve, 322 oil pump, 323 second electromagnetic valve, 330 second oil pipe, 331 third electromagnetic valve, 340 third oil pipe, 341 fourth electromagnetic valve, 350 fourth oil pipe, 351 fifth electromagnetic valve;
410 screw rods, 420 stepping motors, 430 nut seats and 440 sliding rails;
510 first U-shaped piece, 520 second U-shaped piece, 530 connecting plate;
610 drain fitting, 620 sealing the bag;
710 left limit switch, 720 mounting plate, 730 electric telescopic rod, 740 right limit switch;
810 display screen, 820 control buttons;
910 connector, 920 connect oil head, 930 sealing plug, 940 advance oil pipe, 950 oil outlet, 960 play oil pipe, 970 elastic sleeve.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation or positional relationships indicated as "upper", "lower", "front", "rear", "left", "right", etc., are based on the orientation or positional relationships shown in the drawings, are merely for convenience of describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the description of "first", "second", etc. is only for the purpose of distinguishing technical features, and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 5, the portable step-by-step automatic oil extraction device for oil chromatography according to the embodiment of the invention comprises a box body 100 and a controller, wherein a first cavity 110 is arranged in the box body 100, an oil extraction injector 200 is embedded in the first cavity 110, an oil extraction interface 310 is arranged on the side wall of the box body 100, one end of the oil extraction interface 310 extends into the first cavity 110 and is connected with a first oil pipe 320, the other end of the first oil pipe 320 is connected with a waste oil recovery component, a first electromagnetic valve 321, an oil pump 322 and a second electromagnetic valve 323 are sequentially arranged on the first oil pipe 320, a second oil pipe 330 is communicated with a part of the first oil pipe 320 between the oil pump 322 and the second electromagnetic valve 323, the other end of the second oil pipe 330 is communicated with a connecting oil nozzle 210 of the oil extraction injector 200, a third electromagnetic 331 is arranged on the second oil pipe 330, a part of the second oil pipe 330 between the third electromagnetic 331 and the oil extraction injector 200 is communicated with a third oil pipe 340, the other end of the third oil pipe 340 is connected with a part of the third oil pipe 320 between the first electromagnetic valve 321 and the oil pump 322, and a fourth electromagnetic valve 341 is arranged on the third oil pipe 340; the piston handle 220 of the oil extraction injector 200 is connected with a clamping piece, the clamping piece is connected in the first cavity 110 in a sliding manner, and the clamping piece is driven to move through a first power mechanism; the first power mechanism, the first electromagnetic valve 321, the second electromagnetic valve 323, the third electromagnetic valve 331, the fourth electromagnetic valve 341 and the oil pump 322 are all in signal connection with the controller. Compared with the prior art, the embodiment of the invention is provided with a pipe loop formed by the first oil pipe 320 and the second oil pipe 330 in the box body 100, and simultaneously the oil extraction injector 200 is detachably embedded in the first cavity 110; when oil extraction is needed, the oil extraction injector 200 is embedded in the first cavity 110, the oil nozzle 210 connected with the oil extraction injector 200 is communicated with the second oil pipe 330, the oil extraction interface 310 is communicated with an oil tank of a transformer through a hose, then a controller is started, the controller firstly controls the first electromagnetic valve 321, the oil pump 322 and the third electromagnetic valve 331 to be opened, meanwhile, the first power mechanism is controlled to start to drive the piston handle 220 to move in a direction away from the oil extraction injector 200 through the clamping piece, so that oil is conveyed into the oil extraction injector 200, after the oil conveyed into the oil extraction injector 200 reaches a set amount, the controller stops, after a period of time, the controller controls the fourth electromagnetic valve 341, the oil pump 322 and the second electromagnetic valve 323 to be opened, and simultaneously controls the first power mechanism to start to drive the piston handle 220 to move in a direction close to the oil extraction injector 200 through the clamping piece, so that the oil in the oil extraction injector 200 is conveyed into the waste oil recovery assembly through the second oil pipe 330, the third oil pipe 340 and the first oil pipe 320 in sequence for recovery, and the actions are repeated for a plurality of times, and a cleaning function is achieved; when the cleaning is finished, the controller controls the first electromagnetic valve 321, the oil pump 322 and the third electromagnetic valve 331 to be opened, and simultaneously controls the first power mechanism to start to drive the piston handle 220 to move in a direction away from the oil extraction injector 200 through the clamping piece; thus, the oil in the transformer sequentially enters the oil extraction injector 200 through the oil extraction interface 310, the first oil pipe 320 and the second oil pipe 330, and when the oil quantity in the oil extraction injector 200 reaches a sampling set value, the control device stops to realize the collection work; the production injector 200 is then removed from the first cavity 110 and sent to a laboratory for testing analysis; when the system is needed to discharge oil after the oil extraction injector 200 is taken out, the oil extraction interface 310 is disconnected from the oil tank of the transformer, and then the first electromagnetic valve 321, the oil pump 322 and the second electromagnetic valve 323 are started, so that the oil in the pipe loop is discharged to the waste oil recovery component for recovery, and the oil in the pipe loop is prevented from affecting the detection result when another transformer is sampled and detected. The device can replace the traditional manual operation, realize the full-automatic function of cleaning and oil extraction integration, improve the field work efficiency, realize the standardized operation flow and improve the operation safety and convenience; the method can bring positive social benefits to enterprises, has good popularization of achievements and strong practicability, and can be effectively applied to the power system. It can be understood that an elastic arc clamping piece (not shown in the figure) is disposed in the first cavity 110, the oil extraction injector 200 is detachably clamped in a space surrounded by the arc clamping piece, when the arc clamping piece is not deformed, the aperture of the oil extraction injector 200 is larger than the inner diameter of the arc clamping piece, and thus, the oil extraction injector 200 pushes the arc clamping piece to elastically deform and be embedded into the space surrounded by the arc clamping piece, and then the arc clamping piece elastically recovers, so that the inner wall of the arc clamping piece is attached to the outer peripheral surface of the oil extraction injector 200, and the stable installation of the oil extraction injector 200 is ensured.
As shown in fig. 1, 2 and 4, preferably, a groove 150 is provided on a side wall of the box 100, the oil extraction interface 310 is embedded in the groove 150, and a sealing plate 160 is hinged at an opening of the groove 150. When not in operation, the sealing plate 160 seals the groove 150, so that dust and the like are prevented from entering the groove 150 and adhering to the oil extraction interface 310, and the quality of oil extraction is prevented from being influenced.
As shown in fig. 4, preferably, the opening of the first cavity 110 is provided with a first door 170 that can be opened and closed, and the first door 170 can seal the first cavity 110, so as to avoid interference to the oil extraction injector 200 from the outside during the working process of the device, and influence the normal working process.
Preferably, the device is further provided with a voice player in signal connection with the controller, and when the oil quantity collected in the oil extraction injector 200 reaches a set value, the controller controls the voice player to make a sound to remind an operator.
As shown in fig. 1, in some embodiments of the present invention, the first power mechanism includes a screw 410 disposed along a length direction of the oil production injector 200, one end of the screw 410 is connected to a stepping motor 420 for driving the screw 410 to rotate, the screw 410 is connected to a nut seat 430, and the clamping member is connected to the nut seat 430. In the working process, the stepper motor 420 rotates forward or backward, so that the screw 410 rotates forward or backward, and as the two ends of the screw 410 are rotationally connected in the first cavity 110, the nut seat 430 moves relative to the screw 410, so as to drive the piston handle 220 to move towards a direction away from or close to the oil extraction injector 200, thereby realizing the functions of cleaning and oil extraction; the screw-nut pair has high transmission precision, so that the final oil production of the oil production injector 200 is more accurate. It should be noted that the embodiment of the present invention is merely a preferred structure of the first power mechanism, and the first power mechanism may be configured as other power components such as a cylinder according to actual needs.
As shown in fig. 1, 3 and 4, it is preferable that a sliding rail 440 parallel to the screw 410 is provided under the screw 410, and the lower end of the nut seat 430 is slidably coupled to the sliding rail 440 through a slider. Through the guiding function of the sliding rail 440, the nut seat 430 is driven by the screw 410 to move smoothly, so that the clamping piece drives the piston handle 220 to move smoothly in a direction away from or close to the oil extraction injector 200, and oil absorption and oil discharge functions of the oil extraction injector 200 are realized. Specifically, the sliding rail 440 is configured as a dovetail sliding rail, and the slider is configured as a dovetail slider.
As shown in fig. 1, 3 and 6, in some embodiments of the present invention, the clamping member includes a first U-shaped member 510, a second U-shaped member 520, and a connection plate 530 connected to the nut seat 430, the first U-shaped member 510 and the second U-shaped member 520 being disposed opposite to each other on the connection plate 530, the first U-shaped member 510 being positioned on a side of the piston stem 220 of the production syringe 200 facing the production syringe 200, and the second U-shaped member 520 being positioned on a side of the piston stem 220 of the production syringe 200 facing away from the production syringe 200. Because the first U-shaped member 510 and the second U-shaped member 520 are respectively located at two sides of the piston handle 220, when the stepper motor 420 drives the screw 410 to rotate forward, the first U-shaped member 510 abuts against the side wall of the piston handle 220 and pushes the piston handle 220 to move in a direction away from the oil extraction injector 200 to absorb oil; when the stepping motor 420 drives the screw 410 to rotate reversely, the second U-shaped piece 520 abuts against the side wall of the piston handle 220 and pushes the piston handle 220 to move towards the direction approaching the oil extraction injector 200 for oil extraction.
As shown in fig. 1 and 2, in some embodiments of the present invention, a fourth oil pipe 350 is further connected to an end of the oil extraction port 310 extending into the first cavity 110, another end of the fourth oil pipe 350 communicates with the connection nipple 210 of the oil extraction injector 200, and a fifth electromagnetic valve 351 in signal connection with the controller is provided on the fourth oil pipe 350. The fourth oil pipe 350 is additionally communicated with the oil nozzle 210 connected with the oil extraction injector 200, and when oil is absorbed, the controller can control the fifth electromagnetic valve 351 to be opened, so that oil in the transformer enters the oil extraction injector 200 through two pipelines; meanwhile, when a certain pipeline is blocked, the oil can be absorbed normally.
As shown in fig. 1, in some embodiments of the present invention, a second cavity 120 is further disposed in the tank 100, an end of the first oil pipe 320 facing away from the oil extraction port 310 extends into the second cavity 120, and an end of the first oil pipe 320 facing away from the oil extraction port 310 is provided with an oil extraction joint 610; the waste oil recovery assembly is provided with a sealed bag 620, and the sealed bag 620 is sleeved on the oil discharging joint 610. By sleeving the sealing bag 620 on the oil extraction joint 610, one end of the first oil pipe 320, which is far away from the oil extraction joint 310, stretches into the sealing bag 620, so that waste oil is recovered without overflowing; also, after the sealed bag 620 is filled, the old sealed bag 620 may be removed and replaced with a new sealed bag 620 for use.
As shown in fig. 4, preferably, the opening of the second cavity 120 is provided with a second door 130 that can be opened and closed, and the second door 130 is provided with a viewing window 140 corresponding to the position of the sealed bag 620. The second cavity 120 can be plugged by the second box 100, so that the interference of the outside in the working process is avoided; at the same time, the operator can observe the oil collection amount of the sealed bag 620 through the visual window 140, so as to timely detach the sealed bag 620 filled with waste oil and replace the sealed bag 620, so as to prevent the waste oil from overflowing into the box 100.
As shown in fig. 1 and 3, in some embodiments of the present invention, a left limit switch 710 is disposed in the first cavity 110, a mounting plate 720 is disposed on a side of the left limit switch 710 facing away from the oil production injector 200, the mounting plate 720 is driven to lift by an electric telescopic rod 730, and a right limit switch 740 is disposed on the mounting plate 720; the left limit switch 710, the right limit switch 740 and the electric telescopic rod 730 are all in signal connection with the controller. The left limit switch 710 may define a leftmost position of the nut seat 430, such that the nut seat 430 is stopped when the nut seat 430 is moved to a position where the left limit switch 710 is triggered, and the waste oil in the oil recovery syringe 200 is exactly drained when the nut seat 430 is moved to a position where the left limit switch 710 is triggered; before oil extraction is performed after cleaning is completed, the controller controls the electric telescopic rod 730 to extend so as to drive the mounting plate 720 to lift, then when the nut seat 430 moves to a position for triggering the right limit switch 740, the right limit switch 740 transmits a signal to the controller, the controller controls the first power mechanism to stop, and the oil amount sucked into the oil extraction injector 200 just reaches a required value at the moment, so that insufficient or excessive oil extraction is avoided.
As shown in fig. 1 and 4, in some embodiments of the present invention, the controller includes a PLC and a display screen 810 electrically connected to the PLC, the display screen 810 is disposed on an outer surface of the case 100, and a control button 820 electrically connected to the PLC is further disposed on the outer surface of the case 100. The control button 820 can modify the set values such as the cleaning time, the cleaning times and the like controlled in the PLC so as to meet different oil extraction requirements; meanwhile, an operator can observe the content of the PLC program in real time through the display screen 810 so as to discover errors and modify the errors in time.
As shown in fig. 1, 2 and 5, in some embodiments of the present invention, the oil recovery injector 200 includes a barrel 230 and a piston rod 240 disposed in the barrel 230, wherein one end of the piston rod 240 extends out of the barrel 230 and is provided with a piston handle 220, and a connection nipple 210 is disposed at an end of the barrel 230 facing away from the piston handle 220; the connecting oil nozzle 210 is detachably sleeved with a connecting head 910, one end of the connecting head 910, which is away from the connecting oil nozzle 210, is provided with an oil receiving port 920, the oil receiving port 920 is communicated with a second oil pipe 330, one end of the connecting head 910, which is away from the connecting oil nozzle 210, is provided with a sealing plug 930, the center of the sealing plug 930 is provided with an oil inlet pipe 940, and the oil inlet pipe 940 is communicated with the oil receiving port 920; the sealing plug 930 is provided with an oil outlet 950, one end, close to the connecting oil nozzle 210, of the connector 910 is provided with an oil outlet 960, and the oil inlet 940 is communicated with the oil outlet 960 through the oil outlet 950; the oil outlet pipe 960 is communicated with the connecting nipple 210, and the sealing plug 930 is sleeved with an elastic sleeve 970 covering the oil outlet hole 950. During operation, the oil extraction injector 200 is embedded in the first cavity 110, the connector 910 is in butt joint communication with the second oil pipe 330, when oil is absorbed, the oil body enters the oil inlet pipe 940 and then is ejected from the oil outlet hole 950 by external oil inlet pressure, then sequentially passes through the oil outlet pipe 960 and the connecting oil nozzle 210 and enters the cylinder 230, after oil absorption is completed, the oil inlet pressure of the elastic sleeve 970 is lost, the elastic sleeve is attached to the sealing plug 930 again and the oil outlet hole 950 is blocked, and the sealing effect is achieved, so that after the oil extraction injector 200 is taken out of the first cavity 110, the oil outlet hole 950 is sealed due to elastic deformation of the elastic sleeve 970, thereby effectively preventing external air from entering the cylinder 230 through the inside of the connector 910, having good sealing performance, being convenient and safe to operate, the connector 910 is sleeved on the connecting oil nozzle 210, and can be taken down after returning to a laboratory, or gas is directly injected from the oil inlet pipe 940 for experimental analysis. In particular, the elastic sleeve 970 is provided as a rubber tube.
As shown in fig. 5, the oil outlet 950 is preferably opened at the top end of the sealing plug 930. The oil outlet is formed at the top end of the sealing plug 930, and after oil absorption is finished, the oil body remaining on the elastic sleeve 970 is subject to gravity and the elastic force of the elastic sleeve 970 to flow back into the sealing plug 930 from the oil outlet 950.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The portable step-by-step automatic oil extraction device for the oil chromatograph is characterized by comprising a box body and a controller, wherein a first cavity is arranged in the box body, an oil extraction injector is embedded in the first cavity, an oil extraction interface is arranged on the side wall of the box body, one end of the oil extraction interface extends into the first cavity and is connected with a first oil pipe, the other end of the first oil pipe is connected with a waste oil recovery component, a first electromagnetic valve, an oil pump and a second electromagnetic valve are sequentially arranged on the first oil pipe, a second oil pipe is communicated with a part of the first oil pipe between the oil pump and the second electromagnetic valve, the other end of the second oil pipe is communicated with a connecting oil nozzle of the oil extraction injector, a third electromagnetic valve is arranged on the second oil pipe, the part of the second oil pipe between the third electromagnetic valve and the oil extraction injector is communicated with a third oil pipe, the other end of the third oil pipe is connected with a part of the first oil pipe between the first electromagnetic valve and the oil pump, a fourth oil pipe is arranged on the third oil pipe, the part of the first oil pipe between the first oil pipe and the first oil pipe is connected with the fourth oil pipe, the fourth oil pipe is connected with the fourth oil extraction injector, and the fourth oil pipe is connected with the oil extraction injector, which is connected with the fourth oil pipe; the piston handle of the oil extraction injector is connected with a clamping piece, the clamping piece is connected in the first cavity in a sliding mode, the clamping piece is driven to move through a first power mechanism, the first power mechanism comprises a screw rod arranged along the length direction of the oil extraction injector, one end of the screw rod is connected with a stepping motor for driving the screw rod to rotate, the screw rod is connected with a nut seat, and the clamping piece is connected to the nut seat; the first power mechanism, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the oil pump are all in signal connection with the controller; the oil extraction injector comprises a cylinder body and a piston rod arranged in the cylinder body, one end of the piston rod extends out of the cylinder body and is provided with a piston handle, and the connecting oil nozzle is arranged at one end of the cylinder body, which is away from the piston handle; the connecting oil nozzle is detachably sleeved with a connector, one end of the connector, which is away from the connecting oil nozzle, is provided with an oil receiving port, the oil receiving port is communicated with the second oil pipe, one end, which is away from the connecting oil nozzle, inside the connector is provided with a sealing plug, the center of the sealing plug is provided with an oil inlet pipe, and the oil inlet pipe is communicated with the oil receiving port; an oil outlet is formed in the sealing plug, an oil outlet pipe is arranged at one end, close to the connecting oil nozzle, inside the connector, and the oil inlet pipe is communicated with the oil outlet pipe through the oil outlet; the oil outlet pipe is communicated with the connecting oil nozzle, and the sealing plug is sleeved with an elastic sleeve which covers the oil outlet hole.
2. The portable step-by-step automatic oil extraction device for oil chromatography according to claim 1, wherein a sliding rail parallel to the lead screw is arranged below the lead screw, and the lower end of the nut seat is slidably connected to the sliding rail through a sliding block.
3. The portable step-wise automatic oil extraction device of claim 1, wherein the clamping member comprises a first U-shaped member, a second U-shaped member and a connecting plate connected to the nut seat, the first U-shaped member and the second U-shaped member are oppositely disposed on the connecting plate, the first U-shaped member is clamped on a side of a piston handle of the oil extraction injector facing the oil extraction injector, and the second U-shaped member is positioned on a side of the piston handle of the oil extraction injector facing away from the oil extraction injector.
4. The portable step-by-step automatic oil extraction device for oil chromatography according to claim 1, wherein a second cavity is further arranged in the box body, one end of the first oil pipe, which is away from the oil extraction interface, extends into the second cavity, and an oil extraction joint is arranged at one end of the first oil pipe, which is away from the oil extraction interface; the waste oil recovery assembly is provided with a sealing bag, and the sealing bag is sleeved on the oil discharge joint.
5. The portable step-by-step automatic oil extraction device for oil chromatography according to claim 4, wherein a second door capable of opening and closing is arranged at the opening of the second cavity, and a visual window is arranged at the position of the second door corresponding to the sealed bag.
6. The portable step-by-step automatic oil extraction device for oil chromatography according to claim 1, wherein a left limit switch is arranged in the first cavity, a mounting plate is arranged on one side of the left limit switch, which is away from the oil extraction injector, the mounting plate is driven to lift by an electric telescopic rod, and a right limit switch is arranged on the mounting plate; the left limit switch, the right limit switch and the electric telescopic rod are in signal connection with the controller.
7. The portable step-by-step automatic oil extraction device for oil chromatography according to claim 1, wherein the controller comprises a PLC and a display screen electrically connected with the PLC, the display screen is arranged on the outer surface of the box, and a control button electrically connected with the PLC is further arranged on the outer surface of the box.
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| CN202011251157.3A CN112255044B (en) | 2020-11-11 | 2020-11-11 | Portable step-by-step automatic oil taking device for oil chromatograph |
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| CN202011251157.3A CN112255044B (en) | 2020-11-11 | 2020-11-11 | Portable step-by-step automatic oil taking device for oil chromatograph |
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| CN112255044B true CN112255044B (en) | 2024-04-09 |
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