CN114705501A

CN114705501A - Crude oil sampler with layered sampling function for oil field

Info

Publication number: CN114705501A
Application number: CN202210358277.6A
Authority: CN
Inventors: 舒放
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-05

Abstract

The invention relates to the technical field of crude oil sampling, in particular to a crude oil sampler with a layered sampling function for an oil field. The technical problem is as follows: the crude oil sampler with the layered sampling function for the oil field is capable of improving detection accuracy. The technical scheme is as follows: the utility model provides an oil field is with crude oil sampler who has layering sample function, is including casing, well casing, feeding chamber, last casing, sampling mechanism and wiper mechanism down, and the last side demountable installation of casing has well casing down, and the lower part of well casing is opened has the feeding chamber that is used for the oil sample, and the internal sampling mechanism that is used for the oil layering to leave the appearance that is equipped with of lower casing installs the wiper mechanism that is used for the greasy dirt to clear up in the well casing. According to the invention, the sampling mechanism is matched with the power mechanism to sample the sampling body in the oil-water separator, and the cleaning mechanism is used for cleaning the inlet of the sampling mechanism after sampling is finished, so that the problem that the sampling quality of the next sampling body is hindered by doping the last sampling body when the sampling body is sampled next time is avoided.

Description

Crude oil sampler with layered sampling function for oil field

Technical Field

The invention relates to the technical field of crude oil sampling, in particular to a crude oil sampler with a layered sampling function for an oil field.

Background

After the crude oil is produced, the water content in the crude oil is different due to different production positions in the crude oil, and therefore the crude oil needs to be treated by an oil-water separator to separate or stratify water and oil in the crude oil.

In the prior art, in the process of treating crude oil in a self-settling oil-water separator, the crude oil in the oil-water separator is generally sampled and detected, the separation effect of oil and water in the crude oil is obtained through detection, when the crude oil in the oil-water separator is sampled in the prior art, a sampler is mostly adopted to sample the crude oil in the oil-water separator, while the existing sampler for the oil-water separator performs single sampling on crude oil with different depths during sampling, because the prior sampler can not control the sampling quantity every time, the manpower and crude oil are wasted, moreover, because the sampling amount is different every time, the data is directly sent to be detected, which causes errors in the obtained detection data, if the detected data is taken as the separation result of oil and water in crude oil in the whole oil-water separator, the method causes lower data accuracy.

In view of the above problems, we have developed a crude oil sampler with a layered sampling function for oil fields, which improves the detection accuracy.

Disclosure of Invention

In order to overcome and carry out the single sample to the crude oil of different degree of depth, because current sampler can't control sampling volume at every turn, so can cause the waste of manpower and crude oil, and because sampling volume difference at every turn can cause the measuring data that obtains to have the error, regard it as whole oil water separator's separation result, can cause the lower shortcoming of data accuracy, the technical problem is: provides a crude oil sampler with a layered sampling function for improving the detection result.

The technical scheme of the invention is as follows: the utility model provides an oil field is with crude oil sampler that has layering sample function, including lower casing, well casing, the feeding chamber, go up the casing, sampling mechanism, wiper mechanism and power unit, the last side demountable installation of casing has well casing down, the lower part of well casing is opened has the feeding chamber that is used for the oil sample, the last side demountable installation of well casing has last casing, the last side center department of going up the casing is equipped with solid fixed ring, lower casing, the junction of well casing and last casing all fills up and is used for sealed rubber pad, the internal sampling mechanism that is used for the oil layering to keep a sample that is equipped with of inferior valve, install the wiper mechanism who is used for the greasy dirt clearance in the well casing, wiper mechanism and sampling mechanism cooperation, the interior upper portion of well casing is provided with the power unit that is used for the oil sample to provide power, power unit is connected with wiper mechanism and sampling mechanism respectively.

Further, the sampling mechanism comprises a containing shell, a sampling shell, an n-shaped pipe, a first piston rod, a second piston rod and a sealing assembly, wherein three containing shells for storing sampled petroleum are arranged in the middle shell at equal intervals in the circumferential direction, a discharging pipe is embedded in the center of the bottom of the containing shell, valves are arranged on the discharging pipe on the containing shell, three sampling shells for sampling petroleum are arranged in the middle shell at equal intervals in the circumferential direction, the three sampling shells are respectively positioned at the inner sides of the three containing shells, the three containing shells and the three sampling shells are respectively and fixedly connected with the middle shell, a conveying pipe is arranged between the lower parts of the adjacent containing shells and the sampling shells, the three conveying pipes are respectively arranged in an inclined mode with high inside and low outside, electromagnetic valves are arranged in the conveying pipes, the n-shaped pipe is embedded between the top parts of the adjacent containing shells and the sampling shells, the two ends of the n-shaped pipe are respectively provided with the first piston rod and the second piston rod in a sliding fit with the n-shaped pipe, the three first piston rods are respectively positioned in the three containing shells and are in a sliding fit with the three containing shells, the three second piston rods are respectively located in the three sampling shells and are in sliding sealing fit with the three sampling shells, a discharging pipe is embedded in the lower side of the inner wall of each sampling shell, the discharging pipes are arranged in an L shape, one-way valves are arranged in the three discharging pipes, a sealing assembly is arranged between the upper portions of the three discharging pipes, and the sealing assembly is fixedly connected with the middle shell.

Further, seal assembly is including unloading pipe, installation piece, connecting block and sealing washer, and it has the installation piece to be provided with the rigid coupling between the upper portion of three unloading pipe, installation piece and well casing rigid coupling, and the intraductal upper portion rigid coupling of three unloading has a set of connecting block, and a set of connecting block is equipped with two and symmetry setting, and the upside of three connecting blocks of group all has the sealing washer through spring mounting, and the upside and the downside of sealing washer are inside arcwall face.

Furthermore, the sealing ring is made of corrosion-resistant rubber.

Further, the cleaning mechanism comprises a first rotating shaft, a fixed disc, first tension springs, a connecting disc, telescopic rods, a sealing shell, a piston plate, a liquid inlet pipe, a rotating plate and a moving frame, wherein the center of the upper shell and the middle shell is rotatably provided with the first rotating shaft, the lower part of the first rotating shaft is rotatably provided with the fixed disc, the lower side surface of the fixed disc is fixedly connected with three first tension springs at equal intervals in the circumferential direction, the connecting disc is fixedly connected between the lower ends of the three first tension springs at equal intervals in the circumferential direction, the lower side surface of the connecting disc is fixedly connected with the three telescopic rods at equal intervals in the circumferential direction, the sealing shell is connected between the lower parts of the fixed parts of the three telescopic rods, the upper part of the sealing shell is in a circular shell shape, the lower part of the sealing shell is in a conical shell shape, the lower side surface of the sealing shell is provided with a sealing ring, the lower parts of the sealing shell are upwards provided with annular bulges for sealing, the movable parts of the three telescopic rods respectively penetrate through the sealing shell to be in sliding connection with the piston plate, piston plate and sealed shell sliding seal cooperation, the lateral wall upper portion intercommunication of sealed shell has the feed liquor pipe, the feed liquor pipe is the hose setting, the feed liquor pipe passes well casing, the lower extreme rigid coupling of first pivot has the rotor plate, the rotor plate rotates with the last side of installation piece to be connected and sealed cooperation, the feed inlet that is used for the oil unloading is offered to the eccentric department of rotor plate, be equipped with the filter screen that is used for filtering impurity in the feed inlet on the rotor plate, the circumference wall rigid coupling of connection pad has the removal frame, the removal frame passes the lower part of well casing and rather than sliding connection.

Further, the power mechanism comprises a large gear, a first bevel gear, a stepping motor, a small gear, a fixed frame, an annular plate, sliding rods, an arc block, a rotating rod and an oil pumping and discharging assembly, the upper part of the first rotating shaft is fixedly connected with the large gear, the first bevel gear is fixedly connected to the first rotating shaft, the first bevel gear is positioned below the large gear and positioned on the upper side of the rotating plate, the stepping motor is arranged on the upper inner part of the middle shell through a mounting seat, the stepping motor is positioned on the left side of the large gear, the small gear is mounted on an output shaft of the stepping motor and meshed with the large gear, the number of teeth of the small gear is one sixth of the number of teeth of the large gear, the fixed frame is rotatably mounted on the upper part of the first rotating shaft and positioned between the large gear and the first bevel gear, the annular plate is mounted on the lower part of the fixed frame, an annular groove is formed in the inner side surface of the annular plate, and three sliding rods are arranged on the outer side surface of the annular plate in a circumferential equidistant sliding manner, the arc piece is all installed to the inner of three slide bar, and three arc piece respectively and the rigid coupling have two springs between the arc, and the rigid coupling has the dwang in the first pivot, and the dwang is in same horizontal plane with three arc piece, and the upper portion of well casing is provided with the oil and takes out and put the subassembly, and the oil is taken out and is put the subassembly and be connected with three slide bar respectively, and the oil is taken out and is put the subassembly and take out and put three sample shell sliding fit respectively.

Further, the petroleum pumping and discharging component comprises guide blocks, a mounting rack, swing plates, push rods, second rotating shafts, second bevel gears, discs, straight gears, a rack frame, a downward pressing frame and second tension springs, wherein the upper parts of three sampling shells are fixedly connected with the guide blocks in the anticlockwise direction, guide sleeves are respectively installed on the three guide blocks in the anticlockwise direction, the mounting rack is respectively fixedly connected between the three guide blocks and the sampling shells adjacent to the anticlockwise direction, the swing plates are respectively installed in the middle parts of the three mounting racks in an equal rotating manner, the upper parts of the three swing plates are respectively hinged with the three slide rods, the lower parts of the inner side surfaces of the three swing plates are respectively hinged with the push rods, the three push rods respectively penetrate through the guide sleeves on the three guide blocks, the second rotating shafts are respectively installed on the inner upper part of the middle shell in the circumferential direction in an equal distance manner through connecting rods, the straight gears are fixedly connected inside the three second rotating shafts, and the discs are arranged on the three second rotating shafts in a sliding manner through splines, second bevel gears are installed on the inner side faces of the three discs, the three second bevel gears are in spline sliding fit with three second rotating shafts respectively, three push rods are hinged to the three discs respectively, the three second bevel gears are matched with first bevel gears respectively, racks are arranged on the three guide blocks in a sliding mode respectively, supporting springs are fixedly connected between the three guide blocks and the three racks respectively, the three racks are meshed with three straight gears respectively, the outer portions of the three racks are L-shaped rods, protrusions are arranged on the upper portions of the three racks, pressing frames are fixedly connected to the outer portions of the three racks respectively, the three pressing frames are in sliding fit with three n-shaped pipes respectively, second tension springs are installed on the three pressing frames respectively, the lower ends of the three second tension springs are fixedly connected with adjacent second piston rods, and the three second tension springs are sleeved on the outer sides of the three n-shaped pipes respectively.

Further, the quantitative sampling device comprises a quantitative adjusting mechanism, the quantitative adjusting mechanism is arranged between the upper parts of the three sampling shells and is respectively connected with the upper shell and the first rotating shaft, the quantitative adjusting mechanism comprises positioning frames, arc plates, reset springs, a mounting disc, a rotating rod, positioning discs, pushing frames, a lower pressing disc, a lower pressing bar and positioning blocks, the positioning frames are respectively arranged on the upper parts of the three sampling shells in a sliding mode, the upper parts of the three positioning frames penetrate through the upper part of the middle shell and the lower part of the upper shell, the arc plates are respectively arranged on the upper parts of the three positioning frames and are respectively in sliding fit with the upper shell, the two reset springs are respectively fixedly connected between the three arc plates and the upper shell, the mounting disc is arranged at the upper end of the first rotating shaft, the rotating rod is connected to the center of the upper side face of the mounting disc, the lower part of the rotating rod is fixedly connected with the positioning discs, and the three pushing frames are arranged on the positioning discs in a sliding mode at equal intervals in the circumferential direction, the rigid coupling has down the pressure disk between the lower part of three promotion frame, the rigid coupling has six springs between lower pressure disk and the positioning disk, six springs overlap respectively on three promotion frame, the lower part circumference equidistance of rotary rod is connected with three depression bar down, three depression bar is located down between pressure disk and the positioning disk down, three depression bar is located adjacent promotion frame inboard respectively down, the downside outside of three depression bar down all is equipped with decurrent spherical bulge, a plurality of recess has all been seted up to the lower part of three promotion frame, all slide in the recess on the three promotion frame and be equipped with the locating piece, the outside of a plurality of locating piece is spherical setting, the rigid coupling has the spring between the adjacent promotion frame of a plurality of locating piece difference, a plurality of downwardly extending's locating hole has been seted up to the last side circumference equidistance of mounting disk, the constant head tank has all been seted up on the mounting disk of a plurality of locating hole both sides, constant head tank and locating piece cooperation on the mounting disk.

Further, the side of going up of arc is become low setting gradually to both sides by the middle part, and the side of going up of arc is the smooth surface.

Furthermore, the spherical surfaces of the positioning blocks are rough surfaces.

The beneficial effects are that: the invention realizes the sampling of the sampling body in the oil-water separator by the matching of the sampling mechanism and the power mechanism, utilizes the upward movement of the second piston rod to be matched with the sampling shell, sucks the sampling body in the feeding cavity into the sampling shell through the blanking pipe to finish the sampling, utilizes the downward movement of the second piston rod to open the electromagnetic valve in the conveying pipe connected with the second piston rod, therefore, the sampling body in the sampling shell is pushed into the corresponding containing shell to be stored, the inlet of the sampling mechanism is cleaned by the cleaning mechanism after the sampling is finished, the problem that the sampling body is doped last time when the sampling body is sampled next time and the sampling quality of the sampling body is hindered next time is avoided, the sealing shell is in sealing fit with the rotating plate, chemical cleaning agents are injected into the sampling device to clean the sampling device, so that the situation that impurities filtered by a last sampling body block a filter screen when the sampling body is sampled next time, and the sampling or quality of the next sampling body is hindered is avoided; utilize the locating piece card to go into in the constant head tank and fixed to rotate extrusion arc downstream through pushing down the pole, make the locating rack downstream carry on spacingly to second piston rod rebound distance, so to the sample volume in the sample shell limit, avoid extracting too much sample body and cause the waste.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional perspective view of the present invention.

Fig. 3 is a schematic sectional perspective view of the sampling mechanism of the present invention.

Fig. 4 is a schematic view of a partial cross-sectional perspective structure of the sampling mechanism of the present invention.

FIG. 5 is a schematic sectional perspective view of the cleaning mechanism of the present invention.

Fig. 6 is a schematic perspective view of the power mechanism of the present invention.

Fig. 7 is a partially cut-away perspective structure diagram of the power mechanism of the present invention.

Fig. 8 is a schematic perspective view of a portion of the power mechanism of the present invention.

Fig. 9 is a schematic perspective view of a portion of the quantitative adjustment mechanism of the present invention.

Fig. 10 is a partially sectional perspective view of the quantitative adjustment mechanism of the present invention.

Part names and serial numbers in the figure: 1. a lower shell, 2, a middle shell, 201, a feeding cavity, 3, an upper shell, 4, a sampling mechanism, 401, a containing shell, 402, a sampling shell, 403, an n-shaped pipe, 404, a first piston rod, 405, a second piston rod, 406, a blanking pipe, 407, a mounting block, 408, a connecting block, 409, a sealing ring, 5, a cleaning mechanism, 501, a first rotating shaft, 502, a fixed disk, 503, a first tension spring, 504, a connecting disk, 505, a telescopic rod, 506, a sealing shell, 507, a piston plate, 508, a liquid inlet pipe, 509, a rotating plate, 510, a moving frame, 6, a power mechanism, 601, a large gear, 602, a first bevel gear, 603, a stepping motor, 604, a pinion, 605, a fixed frame, 606, a ring plate, 607, a sliding rod, 608, an arc-shaped block, 609, 610, a guide block, 611, a mounting frame, 612, a swinging plate, 613, a pushing rod, 614, a second rotating shaft, 615, a second bevel gear, 616. the device comprises a disk, 617, a straight gear, 618, a rack, 619, a lower pressing frame, 620, a second tension spring, 7, a quantitative adjusting mechanism, 701, a positioning frame, 702, an arc plate, 703, a return spring, 704, a mounting plate, 705, a rotating rod, 706, a positioning plate, 707, a pushing frame, 708, a lower pressing plate, 709, a lower pressing rod, 710, a positioning block, 711 and a positioning hole.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

A crude oil sampler with a layered sampling function for an oil field is disclosed, as shown in figures 1-8, and comprises a lower shell 1, a middle shell 2, a feeding cavity 201, an upper shell 3, a sampling mechanism 4, a cleaning mechanism 5 and a power mechanism 6, wherein the upper side surface of the lower shell 1 is detachably provided with the middle shell 2, the lower part of the middle shell 2 is provided with the feeding cavity 201 for petroleum sampling, because the sampling body in an oil-water separator is in a flowing state, after a period of time, the sampling bodies with different heights in the oil-water separator can replace the original sampling bodies in the feeding cavity 201 in a flowing manner, so that when sampling is carried out at different heights each time, the sampling bodies after sampling are ensured to be sampling bodies with relative heights, the upper shell 3 is detachably arranged on the upper side surface of the middle shell 2, the center of the upper side surface of the upper shell 3 is provided with a fixing ring, and rubber pads for sealing are padded at the joints of the lower shell 1, the middle shell 2 and the upper shell 3, be equipped with the sampling mechanism 4 that is used for the oil layering to stay appearance in the casing 1 down, install the wiper mechanism 5 that is used for the greasy dirt clearance in the well casing 2, discharge into chemical cleaning agent in 5 to wiper mechanism through external pipeline, wash the import department of wiper mechanism 4 through chemical cleaning agent, sample body doping last time when avoiding next sample body sample, the quality of sampling for next sample body causes the hindrance, wiper mechanism 5 and the cooperation of sampling mechanism 4, the interior upper portion of well casing 2 is provided with power unit 6 that is used for the oil sample to provide power, power unit 6 is connected with wiper mechanism 5 and sampling mechanism 4 respectively.

When the device is used, a user fixes the fixing ring on the upper shell 3 and the connecting rope of the external lifter, then the user communicates the external pipeline with the cleaning mechanism 5, then the user puts the device into the oil-water separator, when the sampling body in the oil-water separator needs to be accurately and highly sampled, then the user discharges the connecting rope with proper length through the external lifter, the device is sunk into the sampling body in the oil-water separator under the action of gravity, the sampling body in the oil-water separator is poured into the feeding cavity 201 along with the sampling body, when the device moves to a proper position, the user stops the external lifter to discharge the connecting rope, because the sampling body in the oil-water separator is in a flowing state, after a period of time, the sampling bodies with different heights in the oil-water separator can flow and replace the original sampling bodies in the feeding cavity 201, thus ensuring that the sampling is carried out at different heights each time, ensuring that the sampling body after sampling is the sampling body with relative height, further ensuring the detection accuracy of the sampling body, after the device moves downwards to a proper position for a period of time, the user enables the power mechanism 6 to work for a period of time and close, the power mechanism 6 provides starting power for the sampling mechanism 4 in the process of working for a period of time, the sampling mechanism 4 works to sample a sampling body in the oil-water separator, when the sampling is finished, the user makes the power mechanism 6 work again for a period of time and close, in the process, the closed power is provided for the sampling mechanism 4, then the user releases the connecting rope with proper length again through the external lifter, the device sinks downwards under the action of gravity, and when the device sinks downwards to another height in the oil-water separator, the user repeats the operation, and the three times of sampling is continuously and repeatedly completed.

At the moment, a user winds the connecting rope through an external elevator, so that the device is moved upwards out of the oil-water separator, after the device is moved upwards out of the oil-water separator, the user inclines the device, so that the sampling body in the feeding cavity 201 is moved out and falls into the oil-water separator, then the user moves the device to a proper position, the lower shell 1 is separated from the middle shell 2, then the sampling body in the sampling mechanism 4 is moved out and sent to be detected, then the user cleans oil stains on the device and cleans the oil stains in the sampling mechanism 4, then the user discharges a chemical cleaning agent into the cleaning mechanism 5 through an external pipeline, the inlet of the sampling mechanism 4 is cleaned through the chemical cleaning agent, the previous sampling body doping during the next sampling of the sampling body is avoided, and the quality of the next sampling body sampling is hindered, after the washing is accomplished, the user takes out and handles the sewage after the washing through external pipeline, and after the completion of the clearance, the user makes casing 1 and well casing 2 reset down, so is convenient for use next time.

Example 2

On the basis of embodiment 1, as shown in fig. 2-8, the sampling mechanism 4 comprises a containing shell 401, a sampling shell 402, an n-shaped tube 403, a first piston rod 404, a second piston rod 405, a discharging tube 406, a mounting block 407, a connecting block 408 and a sealing ring 409, three containing shells 401 for storing sampled petroleum are arranged in the middle shell 2 at equal intervals along the circumferential direction, a discharging tube is embedded in the bottom center of the containing shell 401, a valve is arranged on the discharging tube on the containing shell 401, three sampling shells 402 for sampling petroleum are arranged in the middle shell 2 at equal intervals along the circumferential direction, the three sampling shells 402 are respectively positioned at the inner sides of the three containing shells 401, the three containing shells 401 and the three sampling shells 402 are respectively fixedly connected with the middle shell 2, a conveying tube is arranged between the lower parts of the adjacent containing shells 401 and the sampling shells 402, the three conveying tubes are all arranged in an inclined manner of high inside and low outside, and electromagnetic valves are arranged in the conveying tubes, so that the sampling body in the sampling shell 402 can flow into the containing shell 401, the n-shaped tube 403 is embedded between the adjacent containing shell 401 and the top of the sampling shell 402, the two ends of the n-shaped tube 403 are respectively provided with the first piston rod 404 and the second piston rod 405 in a sliding manner, the three first piston rods 404 are respectively positioned in the three containing shells 401 and are in sliding fit with the three containing shells 401, the three second piston rods 405 are respectively positioned in the three sampling shells 402 and are in sliding seal fit with the three sampling shells 402, the lower sides of the inner walls of the three sampling shells 402 are respectively embedded with the discharging tube 406, the discharging tubes 406 are arranged in an L shape, the three discharging tubes 406 are respectively provided with the one-way valves, the mounting blocks 407 are fixedly connected between the upper parts of the three discharging tubes 406, the mounting blocks 407 are fixedly connected with the middle shell 2, the upper parts of the three discharging tubes 406 are fixedly connected with a group of connecting blocks 408, the group of connecting blocks 408 are provided with two and are symmetrically arranged, the upper sides of the three groups of the connecting blocks 408 are respectively provided with the sealing rings 409 through springs, the upper side and the lower side of the sealing ring 409 are both inward arc-shaped surfaces, and the sealing ring 409 is made of corrosion-resistant rubber.

The cleaning mechanism 5 comprises a first rotating shaft 501, a fixed disc 502, a first tension spring 503, a connecting disc 504, an expansion link 505, a sealing shell 506, a piston plate 507, a liquid inlet pipe 508, a rotating plate 509 and a moving frame 510, wherein the first rotating shaft 501 is rotatably installed at the center of the upper shell 3 and the middle shell 2, the fixed disc 502 is rotatably installed at the lower part of the first rotating shaft 501, three first tension springs 503 are fixedly connected to the lower side of the fixed disc 502 at equal intervals in the circumferential direction, the connecting disc 504 is fixedly connected between the lower ends of the three first tension springs 503, three expansion links 505 are fixedly connected to the lower side of the connecting disc 504 at equal intervals in the circumferential direction, the sealing shell 506 is connected between the lower parts of the fixing parts of the three expansion links 505, the upper part of the sealing shell 506 is in a circular shell shape, the lower part of the sealing shell 506 is in a tapered shell shape, a sealing ring is arranged on the lower side of the sealing shell 506, annular protrusions for sealing are upwards arranged on the lower parts of the three expansion links 505, and respectively penetrate through the sealing shell 506 to be connected with the sealing shell in a sliding manner, a piston plate 507 is fixedly connected among the movable parts of the three telescopic rods 505, the piston plate 507 is in sliding sealing fit with a sealing shell 506, the upper part of the side wall of the sealing shell 506 is communicated with a liquid inlet pipe 508, the liquid inlet pipe 508 is a hose, the liquid inlet pipe 508 penetrates through the middle shell 2, the lower end of the first rotating shaft 501 is fixedly connected with a rotating plate 509, the rotating plate 509 is in rotating connection and sealing fit with the upper side surface of the mounting block 407, chemical cleaning agents are discharged into the liquid inlet pipe 508 through an external pipeline, the chemical cleaning agents in the liquid inlet pipe 508 flow into the sealing shell 506 along with the liquid inlet pipe, the chemical cleaning agents in the sealing shell 506 increase continuously, so that the sealing shell 506 moves downwards, and as the annular bulge on the sealing shell 506 seals the feeding cavity 201, the sampling bodies in the feeding cavity 201 are prevented from flowing upwards into the middle shell 2, the sealing shell 506 moves downwards to be in contact with the rotating plate 509, and simultaneously cover the feeding hole on the rotating plate 509, at the moment, the chemical cleaning agent is continuously discharged into the sealing shell 506, so that the piston plate 507 moves downwards, the piston plate 507 moves downwards to remove the limit of the chemical cleaning agent in the sealing shell 506, the chemical cleaning agent in the sealing shell 506 flows downwards onto the rotating plate 509, so that the rotating plate 509 is cleaned by the chemical cleaning agent, impurities on a filter screen at a feed inlet on the rotating plate 509 are cleaned simultaneously, the filter screen is prevented from being blocked by impurities filtered by a last sampling body when the sampling body is sampled next time, the sampling or quality of the next sampling body is prevented, after the cleaning is finished, a user extracts and processes the cleaned sewage through an external pipeline, after all the sewage in the sealing shell 506 is extracted, a feed inlet for oil blanking is formed in the eccentric position of the rotating plate 509, and a filter screen for filtering the impurities is arranged in the feed inlet on the rotating plate 509, the feed inlet on the rotating plate 509 coincides with one blanking pipe 406, and at this time, the feed inlet on the rotating plate 509 is moved upwards under the action of the spring on the sealing ring 409, and as the filter screen is arranged in the feed inlet on the rotating plate 509, the sampling body is filtered by the filter screen, so that impurities in the sampling body are prevented from entering the blanking pipe 406 downwards, the circumferential wall of the connecting disc 504 is fixedly connected with a movable frame 510, and the movable frame 510 penetrates through the lower part of the middle shell 2 and is in sliding connection with the lower part.

The power mechanism 6 comprises a large gear 601, a first bevel gear 602, a stepping motor 603, a small gear 604, a fixing frame 605, an annular plate 606, a sliding rod 607, an arc block 608, a rotating rod 609 and an oil pumping and discharging component, the large gear 601 is fixedly connected to the upper part of the first rotating shaft 501, the first bevel gear 602 is fixedly connected to the first rotating shaft 501, the first bevel gear 602 is positioned below the large gear 601 and positioned on the upper side of the rotating plate 509, the stepping motor 603 is arranged on the upper inner part of the middle shell 2 through a mounting seat, the stepping motor 603 is positioned on the left side of the large gear 601, the small gear 604 is mounted on the output shaft of the stepping motor 603, the small gear 604 is meshed with the large gear 601, the number of teeth of the small gear 604 is one sixth of the number of the large gear 601, the fixing frame 605 is rotatably mounted on the upper part of the first rotating shaft 501, the fixing frame 605 is positioned between the large gear 601 and the first bevel gear 602, the annular plate 606 is mounted on the lower part of the fixing frame 605, the annular groove has been seted up to the medial surface of annular slab 606, the lateral surface circumference equidistance of annular slab 606 slides and is equipped with three slide bar 607, arc piece 608 is all installed to the inner of three slide bar 607, three arc piece 608 respectively and the arc 702 between the rigid coupling have two springs, the rigid coupling has dwang 609 on the first pivot 501, dwang 609 is in same horizontal plane with three arc piece 608, the upper portion of well casing 2 is provided with the oil and draws the subassembly of putting, the oil is drawn the subassembly and is put the subassembly and be connected with three slide bar 607 respectively, and the oil is drawn the subassembly and is put respectively with three sample shell 402 sliding fit.

The petroleum pumping and discharging assembly comprises guide blocks 610, a mounting frame 611, swinging plates 612, pushing rods 613, a second rotating shaft 614, a second bevel gear 615, a circular disc 616, a straight gear 617, a rack frame 618, a lower pressing frame 619 and a second tension spring 620, wherein the guide blocks 610 are fixedly connected with the upper parts of three sampling shells 402 in the anticlockwise direction, guide sleeves are respectively installed on the three guide blocks 610 in the anticlockwise direction, the mounting frame 611 is fixedly connected between the three guide blocks 610 and the sampling shells 402 adjacent to the anticlockwise direction, the swinging plates 612 are rotatably installed at the middle parts of the three mounting frames 611, the upper parts of the three swinging plates 612 are respectively hinged with three sliding rods 607, the pushing rods 613 are hinged with the lower parts of the inner side surfaces of the three swinging plates 612, the three pushing rods 613 respectively penetrate through the guide sleeves on the three guide blocks 610, the second rotating shaft 614 is rotatably installed at the inner upper part of the middle shell 2 at equal intervals in the circumferential direction through connecting rods, the straight gears 617 are fixedly connected with the inner parts of the three second rotating shafts 614, three second rotating shafts 614 are respectively provided with a disc 616 in a sliding manner through splines, the inner side surfaces of the three discs 616 are respectively provided with a second bevel gear 615, the three second bevel gears 615 are respectively in sliding fit with the three second rotating shafts 614 through splines, three pushing rods 613 are respectively hinged with the three discs 616, the three second bevel gears 615 are respectively matched with the first bevel gear 602, three guide blocks 610 are respectively provided with a rack 618 in a sliding manner, the three guide blocks 610 are respectively fixedly connected with supporting springs between the three rack 618, the three rack 618 is respectively engaged with three straight gears 617, the outer parts of the three rack 618 are provided with L-shaped rods, the upper parts of the three racks 618 are provided with protrusions, the outer parts of the three racks 618 are respectively fixedly connected with lower pressure frames 619, the three lower pressure frames 619 are respectively in sliding fit with three n-shaped tubes 403, the three lower pressure frames 619 are respectively provided with second tension springs 620, the lower ends of the three second tension springs 620 are fixedly connected with adjacent second piston rods 405, and the three second tension springs 620 are respectively sleeved outside the three n-shaped pipes 403, the rotating rod 609 rotates one sixth of a circle clockwise from the beginning to the end, the arc-shaped block 608 is pressed to move outwards, the second bevel gear 615 moves inwards to be meshed with the first bevel gear 602 through the arc-shaped block 608, the sliding rod 607, the swinging plate 612, the pushing rod 613 and the circular disk 616, power is provided for the rack 618 to move upwards, and the second tension spring 620 is stretched to accumulate force when the lower pressing frame 619 moves upwards.

Initially, the spring on the sealing ring 409 is in a compressed state, and the lowest part of the second piston rod 405 is located at the lower part in the sampling shell 402, after the device is placed into the oil-water separator downwards, the sampling body in the oil-water separator at this time is poured into the feeding cavity 201 along with the sampling body, when the sampling body with the precision height in the oil-water separator needs to be sampled, the user releases the pull rope with the proper length through the external lifter at this time, the device sinks downwards into the oil-water separator under the action of gravity, when the device sinks downwards into the oil-water separator at the proper height, the user stops the external lifter to release the pull rope at this time, because the sampling body in the oil-water separator is in a flowing state, after a period of time, the sampling bodies with different heights in the oil-water separator can flow and replace the original sampling body in the feeding cavity 201, thus ensuring that each time of sampling with different heights, ensuring that the sampled sample body is a sample body with relative height, after the device moves downwards to a proper position for a period of time, the user enables the stepping motor 603 to work, the stepping motor 603 works to drive the pinion 604 to rotate clockwise for a circle and then close, the pinion 604 rotates for a circle to enable the gearwheel 601 to rotate for a sixth circle, the gearwheel 601 rotates for a sixth circle and then drives the first rotating shaft 501 to rotate for a sixth circle, the first rotating shaft 501 rotates for a sixth circle to drive the rotating plate 509 to rotate for a sixth circle, after the rotating plate 509 rotates clockwise for a sixth circle, the feed port on the rotating plate 509 is overlapped with a feed pipe 406, the feed pipe 406 on the rotating plate 509 moves upwards under the action of the spring on the sealing ring 409 to the feed port on the rotating plate 509, the feed pipe 406 is communicated with the feed port on the rotating plate 509, and the sampled body in the feed cavity 201 is poured downwards into the feed port on the rotating plate 509, because the filter screen is arranged in the feeding hole on the rotating plate 509, the sampling body is filtered by the filter screen, so that sundries in the sampling body are prevented from downwards entering the discharging pipe 406, and the sampling body in the discharging pipe 406 enters the connected sampling shell 402.

During the sixth turn of the first rotating shaft 501, the sixth turn of the first rotating shaft 501 drives the rotating rod 609 and the first bevel gear 602 to rotate by one sixth, the rotating rod 609 rotates by one sixth clockwise from the beginning to the end, the arc block 608 moves outwards, the spring connected with the arc block 608 is compressed by the outwards movement of the arc block 608, the sliding rod 607 moves outwards by the outwards movement of the sliding rod 607, the upper part of the connected swinging plate 612 is pushed to swing outwards by the outwards movement of the sliding rod 607, the lower part of the swinging plate 612 swings inwards to move the connected pushing rod 613 inwards, the connected disk 616 is pushed to move inwards by the pushing rod 613, the disk 616 moves inwards to drive the second bevel gear 615 connected with the disk to move inwards, and the second bevel gear 615 moves inwards to be engaged with the first bevel gear 602, when viewed from the front to the back in fig. 2, a sixth turn of the first bevel gear 602 clockwise rotates the second bevel gear 615 by one turn, the second bevel gear 615 rotates the second rotating shaft 614 connected to it by one turn counterclockwise, the second rotating shaft 614 rotates the spur gear 617 thereon by one turn, the spur gear 617 rotates the rack 618 by one turn counterclockwise to move the adjacent rack 618 upward, the rack 618 moves upward to drive the adjacent supporting spring thereon to stretch, the rack 618 moves upward to drive the lower rack 619 to move upward, because the inside of the sampling shell 402 is a closed environment at this time, the lower rack 619 moves upward to stretch the second tension spring 620 for accumulating force, and because the inside of the sampling shell 402 is a closed environment at this time, the sampling body in the feeding cavity 201 at this time will pour into the feeding hole on the rotating plate 509 downward when the feeding hole on the rotating plate 406 coincides with a feeding pipe, because the filter screen is arranged in the feeding hole on the rotating plate 509, the sampling body is filtered through the filter screen, so that sundries in the sampling body are prevented from entering the discharging pipe 406 downwards, the sampling body in the discharging pipe 406 enters the connected sampling shell 402 along with the filtering body, meanwhile, the environment in the sampling shell 402 is not sealed, the corresponding second piston rod 405 moves upwards under the action of the second tension spring 620, the second piston rod 405 moves upwards to pump the sampling body in the feeding pipe into the corresponding sampling shell 402, after a proper amount of sampling body is pumped in the sampling shell 402, the user enables the stepping motor 603 to work again and close, so that the rotating plate 509 rotates clockwise one sixth circle again to be far away from the discharging pipe 406, and meanwhile, all the sampling bodies in the discharging pipe 406 are pumped into the sampling shell 402.

At this time, the first bevel gear 602 does not engage with the second bevel gear 615, the rack 618 moves downwards to reset under the action of the supporting spring, the rack 618 moves downwards to move the connected second piston rod 405 downwards through the supporting spring thereon, the second piston rod 405 moves downwards to move the first piston rod 404 upwards through the adjacent n-shaped tube 403, while the second piston rod 405 moves downwards, the user opens the electromagnetic valve in the delivery pipe connected to the sampling shell 402, the second piston rod 405 moves downwards to push the sampling body in the sampling shell 402 into the corresponding containing shell 401 through the delivery pipe connected thereto, after the second piston rod 405 moves downwards to reset, the sampling body in the sampling shell 402 all flows into the connected containing shell 401 at this time, and the corresponding electromagnetic valve is closed during use, the second piston rod 405 moves downwards to reset, and drives the corresponding first piston rod 404 to move upwards along with the second piston rod 405, the first piston rod 404 moves upward to scrape the inner wall of the housing 401, and the sample body is prevented from adhering to the inner wall of the housing 401.

Then the user discharges the connecting rope again through the external elevator, the device continuously sinks downwards under the action of gravity, after the device sinks downwards to another height in the oil-water separator, the user repeats the operation, and after sampling is finished for three times continuously and repeatedly, the user winds the connecting rope through the external elevator, so the device moves upwards out of the oil-water separator, when the device moves upwards out of the oil-water separator, the user inclines the device, so the sampling body in the feeding cavity 201 moves out and falls into the oil-water separator, then the user moves the device to a proper position, the lower shell 1 is separated from the middle shell 2, then the user opens the valve of the discharging pipe on the containing shell 401, the sampling body in the containing shell 401 moves out along with the discharging pipe on the valve, and meanwhile the user collects the moved sampling body, when the sample body that holds in the shell 401 all shifts out the back, the user repeats above-mentioned operation and shifts out other two sample bodies that hold in the shell 401, sends the triplex sample body to the detection together afterwards, then the user clears up the greasy dirt on this device to the sewage discharge who clears up and clear up it is cleared up to sample shell 402 and the greasy dirt that holds in the shell 401.

Then, a user pulls the moving frame 510 downwards to move the connecting disc 504 downwards, the connecting disc 504 moves downwards to stretch the first tension spring 503, the connecting disc 504 moves downwards to move the sealing shell 506 downwards through the telescopic rod 505, the sealing shell 506 moves downwards to contact with the rotating plate 509, meanwhile, a feed inlet on the rotating plate 509 is covered, at this time, the user discharges chemical cleaning agents into the liquid inlet pipe 508 through an external pipeline, the chemical cleaning agents in the liquid inlet pipe 508 flow into the sealing shell 506 along with the chemical cleaning agents in the sealing shell 506 increasing, so that the piston plate 507 is pushed to move downwards, the piston plate 507 moves downwards to release the limit of the chemical cleaning agents in the sealing shell 506, the chemical cleaning agents in the sealing shell 506 flow downwards to the rotating plate 509, so that the rotating plate 509 is cleaned through the chemical cleaning agents, and meanwhile, impurities on the filter screen at the feed inlet on the rotating plate 509 are cleaned, avoid the filterable impurity of the last sample body of next time when taking a sample the sample body and block up the filter screen, sample the body sample or the quality causes the hindrance for next time, after the washing is accomplished, the user takes out and handles the sewage after the washing through external pipeline, after sewage in the sealed shell 506 is whole to be taken out, the user loosens and removes frame 510, make sealed shell 506 rebound under the effect of first extension spring 503 reset, after the clearance is accomplished, the user makes casing 1 and well casing 2 reset down, so be convenient for use next time.

Example 3

On the basis of embodiment 2, as shown in fig. 5, 6, 9 and 10, the device further includes a quantitative adjustment mechanism 7, the quantitative adjustment mechanism 7 is disposed between the upper portions of the three sampling shells 402, the quantitative adjustment mechanism 7 is respectively connected with the upper shell 3 and the first rotating shaft 501, the quantitative adjustment mechanism 7 includes a positioning frame 701, an arc plate 702, a return spring 703, a mounting plate 704, a rotating rod 705, a positioning plate 706, a pushing frame 707, a pressing plate 708, a pressing rod 709 and a positioning block 710, the positioning frames 701 are respectively slidably disposed on the upper portions of the three sampling shells 402, the upper portions of the three positioning frames 701 penetrate through the upper portions of the middle shell 2 and the lower portion of the upper shell 3, the arc plates 702 are respectively mounted on the upper portions of the three positioning frames 701, the upper side surfaces of the arc plates 702 gradually become lower from the middle portion to both sides, the upper side surfaces of the arc plates 702 are smooth surfaces, the three arc plates 702 are respectively slidably engaged with the upper shell 3, two return springs 703 are fixedly connected between the three arc plates 702 and the upper shell 3, a mounting disc 704 is mounted at the upper end of the first rotating shaft 501, a rotating rod 705 is connected at the center of the upper side surface of the mounting disc 704, a positioning disc 706 is fixedly connected at the lower part of the rotating rod 705, three pushing frames 707 are arranged on the positioning disc 706 in a sliding manner at equal intervals in the circumferential direction, a lower pressing disc 708 is fixedly connected between the lower parts of the three pushing frames 707, six springs are fixedly connected between the lower pressing disc 708 and the positioning disc 706, the six springs are respectively sleeved on the three pushing frames 707, three lower pressing rods 709 are connected at equal intervals in the circumferential direction at the lower part of the rotating rod 705, the three lower pressing rods 709 are positioned between the lower pressing disc 708 and the positioning disc 706, the three lower pressing rods 709 are respectively positioned at the inner sides of the adjacent pushing frames 707, downward spherical protrusions are arranged outside the lower side surfaces of the three lower pressing rods 709, a plurality of grooves are formed at the lower parts of the three pushing frames 707, positioning blocks 710 are arranged in the grooves in the three pushing frames 707 in a sliding manner, the outside of a plurality of locating piece 710 is spherical setting, the rigid coupling has the spring between the adjacent promotion frame 707 of a plurality of locating piece 710 respectively, a plurality of downwardly extending's locating hole 711 has been seted up to the last side circumference equidistance of mounting disc 704, the constant head tank has all been seted up to the pore wall both sides of a plurality of locating hole 711 on the mounting disc 704, the constant head tank on the mounting disc 704 cooperates with locating piece 710, the spherical face of a plurality of locating piece 710 is the setting of mat surface, make it shift out in the recess on the promotion frame 707 under the spring action on locating piece 710, and move into in the constant head tank that corresponds, because the spherical face of locating piece 710 sets up for the mat surface, so avoid moving into in the recess of promotion frame 707 under the effect of no external force.

When the quantity of the sampling body needs to be limited, before the device is placed into an oil-water separator, a user separates an upper shell 3 from a middle shell 2, then the user presses a pushing frame 707 downwards, the pushing frame 707 moves downwards to drive a positioning block 710 on the pushing frame to move downwards, when the positioning block 710 is in contact with a positioning hole 711, the pushing frame 707 continues to move downwards, so that the positioning block 710 can move into a groove in the pushing frame 707, a spring on the positioning block 710 is compressed along with the pushing frame, when the positioning block 710 moves downwards and is overlapped with a positioning groove, the positioning block 710 moves into the groove in the pushing frame 707 under the action of the spring and moves into the corresponding positioning groove, and due to the fact that the spherical surface of the positioning block 710 is arranged to be a rough surface, the positioning block is prevented from moving into the groove of the pushing frame 707 without the action of external force, and then the sampling operation is repeated.

When the first rotating shaft 501 rotates one sixth of a turn, the mounting disc 704 drives the mounting disc 704 to rotate one sixth of a turn, the lower pressing rod 709 rotates one sixth of a turn through the rotating rod 705 on the mounting disc 704, the lower pressing rod 709 continues to rotate to press the arc-shaped plate 702 to move downwards when the lower pressing rod 709 rotates one sixth of a turn and contacts with the arc-shaped plate 702, the lower pressing rod 709 contacts with the highest position in the middle of the arc-shaped plate 702 at the moment when the lower pressing rod 709 does not rotate, the arc-shaped plate 702 moves downwards to compress the return spring 703 connected with the arc-shaped plate 702, the arc-shaped plate 702 moves downwards to drive the positioning frame 701 to move downwards, the positioning frame 701 moves downwards to limit the upward movement distance of the second piston rod 405, the second piston rod 405 moves upwards to draw the sampling body into the sampling shell 402, so as to limit the sampling body in the sampling shell 402, and after sampling is completed, so as to limit the sampling body taken, meanwhile, waste caused by excessive sampling bodies is avoided, when the first rotating shaft 501 rotates one sixth of a turn again, the lower pressing rod 709 does not press the arc-shaped plate 702 at the moment, the arc-shaped plate 702 moves upwards to reset under the action of the reset spring 703 at the moment, after the device is moved out of the oil-water separator, the user repeats the operation to separate the upper shell 3 from the middle shell 2 at the moment, then the user resets the pushing frame 707, the positioning block 710 resets accordingly, and then the user resets the upper shell 3 and the middle shell 2.

It should be understood that the above description is for exemplary purposes only and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention are intended to be included within the scope of the claims herein.

Claims

1. The utility model provides an oil field is with crude oil sampler that has stratified sampling function, is including casing (1) down, well casing (2), feeding chamber (201) and last casing (3), characterized by: the device also comprises a sampling mechanism (4), a cleaning mechanism (5) and a power mechanism (6), wherein the upper side surface of the lower shell (1) is detachably provided with a middle shell (2), the lower part of the middle shell (2) is provided with a feeding cavity (201) for petroleum sampling, the upper side surface of the middle shell (2) is detachably provided with an upper shell (3), the center of the upper side surface of the upper shell (3) is provided with a fixing ring, the lower shell (1), the joint of well casing (2) and last casing (3) all fills up and is used for the sealed rubber pad, be equipped with in lower casing (1) and be used for the oil layering to stay sampling mechanism (4) of appearance, install wiper mechanism (5) that are used for the greasy dirt clearance in well casing (2), wiper mechanism (5) and sampling mechanism (4) cooperation, the interior upper portion of well casing (2) is provided with power unit (6) that are used for the oil sample to provide power, power unit (6) are connected with wiper mechanism (5) and sampling mechanism (4) respectively.

2. The crude oil sampler with stratified sampling function for oil field as claimed in claim 1, wherein: the sampling mechanism (4) comprises a containing shell (401), a sampling shell (402), an n-shaped pipe (403), a first piston rod (404), a second piston rod (405) and a sealing assembly, wherein three containing shells (401) for storing sampling oil are arranged in the middle shell (2) at equal intervals in the circumferential direction, a discharging pipe is embedded in the center of the bottom of each containing shell (401), valves are arranged on the discharging pipes on the containing shells (401), three sampling shells (402) for sampling oil are arranged in the middle shell (2) at equal intervals in the circumferential direction, the three sampling shells (402) are respectively positioned on the inner sides of the three containing shells (401), the three containing shells (401) and the three sampling shells (402) are respectively and fixedly connected with the middle shell (2), a conveying pipe is arranged between the lower parts of the adjacent containing shells (401) and the sampling shells (402), the three conveying pipes are all arranged in an inner high-low-type inclined manner, and are internally provided with electromagnetic valves, it has n venturi tube (403) to inlay between adjacent shell (401) and sample shell (402) top, the both ends of n venturi tube (403) slide respectively and are equipped with first piston rod (404) and second piston rod (405), three first piston rod (404) are located three shell (401) that hold respectively and rather than sliding fit, three second piston rod (405) are located three sample shell (402) respectively and rather than sliding seal cooperation, unloading pipe (406) have all been inlayed to the inner wall downside of three sample shell (402), unloading pipe (406) are L shape setting, all be equipped with the check valve in three unloading pipe (406), be provided with seal assembly between the upper portion of three unloading pipe (406), seal assembly and well casing (2) rigid coupling.

3. The crude oil sampler with the stratified sampling function for the oil field according to claim 2 is characterized in that: sealing assembly is including unloading pipe (406), installation piece (407), connecting block (408) and sealing washer (409), it has installation piece (407) to be provided with the rigid coupling between the upper portion of three unloading pipe (406), installation piece (407) and well casing (2) rigid coupling, the upper portion rigid coupling has a set of connecting block (408) in three unloading pipe (406), a set of connecting block (408) are equipped with two and symmetry setting, sealing washer (409) are all installed through the spring to the upside of three sets of connecting block (408), the upside and the downside of sealing washer (409) are inside arcwall face.

4. The crude oil sampler with the stratified sampling function for the oil field according to claim 3 is characterized in that: the sealing ring (409) is made of corrosion-resistant rubber.

5. The crude oil sampler with the stratified sampling function for the oil field according to claim 1 is characterized in that: the cleaning mechanism (5) comprises a first rotating shaft (501), a fixed disc (502), a first tension spring (503), a connecting disc (504), telescopic rods (505), a sealing shell (506), a piston plate (507), a liquid inlet pipe (508), a rotating plate (509) and a moving frame (510), wherein the first rotating shaft (501) is rotatably installed at the center of the upper shell (3) and the middle shell (2), the fixed disc (502) is rotatably installed at the lower part of the first rotating shaft (501), three first tension springs (503) are fixedly connected with the circumferential equidistant lower side surface of the fixed disc (502), the connecting disc (504) is fixedly connected between the lower ends of the three first tension springs (503), three telescopic rods (505) are fixedly connected with the circumferential equidistant lower side surface of the connecting disc (504), the sealing shell (506) is connected between the lower parts of the fixed parts of the three telescopic rods (505), the upper part of the sealing shell (506) is in a circular shell shape, the lower part of the sealing shell (506) is in a conical shell shape, a sealing ring is arranged on the lower side surface of the sealing shell (506), an annular bulge for sealing is upwards arranged on the lower portion of the sealing shell (506), movable parts of three telescopic rods (505) respectively penetrate through the sealing shell (506) to be in sliding connection with the sealing shell, a piston plate (507) is fixedly connected among the movable parts of the three telescopic rods (505), the piston plate (507) is in sliding sealing fit with the sealing shell (506), a liquid inlet pipe (508) is communicated with the upper portion of the side wall of the sealing shell (506), the liquid inlet pipe (508) is arranged in a hose mode, the liquid inlet pipe (508) penetrates through the middle shell (2), a rotating plate (509) is fixedly connected to the lower end of the first rotating shaft (501), the rotating plate (509) is in rotating connection and sealing fit with the upper side surface of the mounting block (407), a feeding hole for oil blanking is formed in the eccentric position of the rotating plate (509), and a filtering net for filtering impurities is arranged in the feeding hole in the rotating plate (509), the circumferential wall of the connecting disc (504) is fixedly connected with a movable frame (510), and the movable frame (510) penetrates through the lower part of the middle shell (2) and is connected with the middle shell in a sliding mode.

6. The crude oil sampler with the stratified sampling function for the oil field according to claim 5 is characterized in that: the power mechanism (6) comprises a large gear (601), a first bevel gear (602), a stepping motor (603), a small gear (604), a fixed frame (605), an annular plate (606), a sliding rod (607), an arc block (608), a rotating rod (609) and an oil pumping and discharging assembly, wherein the large gear (601) is fixedly connected to the upper part of a first rotating shaft (501), the first bevel gear (602) is fixedly connected to the first rotating shaft (501), the first bevel gear (602) is positioned below the large gear (601) and positioned on the upper side of the rotating plate (509), the stepping motor (603) is arranged on the upper inner part of the middle shell (2) through a mounting seat, the stepping motor (603) is positioned on the left side of the large gear (601), the small gear (604) is mounted on an output shaft of the stepping motor (603), the small gear (604) is meshed with the large gear (601), and the number of teeth of the small gear (604) is one sixth of the number of the large gear (601), mount (605) is installed to the upper portion rotary type of first pivot (501), mount (605) are located between gear wheel (601) and first bevel gear (602), annular plate (606) are installed to the lower part of mount (605), the ring channel has been seted up to the medial surface of annular plate (606), the lateral surface circumference equidistance of annular plate (606) slides and is equipped with three slide bar (607), arc piece (608) are all installed to the inner of three slide bar (607), three arc piece (608) respectively with arc plate (702 between the rigid coupling have two springs, rigid coupling has dwang (609) on first pivot (501), dwang (609) and three arc piece (608) are in same horizontal plane, the upper portion of well casing (2) is provided with the oil and draws the subassembly of putting, the oil is drawn the subassembly and is connected with three slide bar (607) respectively, and the oil is drawn the subassembly and is put respectively with three sample shell (402) sliding fit.

7. The crude oil sampler with stratified sampling function for oil field as claimed in claim 6, wherein: the petroleum pumping and discharging component comprises guide blocks (610), a mounting frame (611), swinging plates (612), pushing rods (613), a second rotating shaft (614), a second bevel gear (615), a disc (616), a straight gear (617), a rack frame (618), a lower pressing frame (619) and a second tension spring (620), wherein the guide blocks (610) are fixedly connected with the upper parts of three sampling shells (402) in the anticlockwise direction, guide sleeves are respectively installed on the three guide blocks (610) in the anticlockwise direction, the mounting frame (611) is fixedly connected between the three guide blocks (610) and the sampling shells (402) adjacent to the anticlockwise direction respectively, the swinging plates (612) are rotatably installed in the middle parts of the three mounting frames (611), the upper parts of the three swinging plates (612) are respectively hinged with the three sliding rods (607), the pushing rods (613) are hinged with the lower parts of the inner side surfaces of the three swinging plates (612), and the three pushing rods (613) respectively penetrate through the guide sleeves on the three guide blocks (610), second rotating shafts (614) are rotatably mounted on the inner upper portion of the middle shell (2) in the circumferential direction at equal intervals through connecting rods, straight gears (617) are fixedly connected inside the three second rotating shafts (614), discs (616) are arranged on the three second rotating shafts (614) in a sliding mode through splines, second bevel gears (615) are mounted on the inner side faces of the three discs (616), the three second bevel gears (615) are respectively in sliding fit with the three second rotating shafts (614) through splines, three pushing rods (613) are hinged to the three discs (616), the three second bevel gears (615) are respectively matched with the first bevel gear (602), rack frames (618) are respectively arranged on the three guide blocks (610) in a sliding mode, supporting springs are fixedly connected between the three guide blocks (610) and the three rack frames (618), the three rack frames (618) are respectively meshed with the three straight gears (617), and the outer portions of the three rack frames (618) are arranged in an L-shaped rod mode, the upper portion of three rack (618) is equipped with the arch, and the outside of three rack (618) is the rigid coupling respectively has down to press frame (619), and three down press frame (619) respectively with three n-shaped pipe (403) sliding fit, all install second extension spring (620) on three down pressing frame (619), the lower extreme and adjacent second piston rod (405) rigid coupling of three second extension spring (620), and three second extension spring (620) overlap respectively in the outside of three n-shaped pipe (403).

8. The crude oil sampler with the stratified sampling function for the oil field according to claim 1 is characterized in that: the quantitative sampling device is characterized by further comprising a quantitative adjusting mechanism (7), the quantitative adjusting mechanism (7) is arranged between the upper portions of the three sampling shells (402), the quantitative adjusting mechanism (7) is respectively connected with the upper shell (3) and the first rotating shaft (501), the quantitative adjusting mechanism (7) comprises positioning frames (701), arc-shaped plates (702), reset springs (703), a mounting plate (704), a rotating rod (705), a positioning plate (706), a pushing frame (707), a lower pressing plate (708), a lower pressing rod (709) and positioning blocks (710), the positioning frames (701) are respectively arranged on the upper portions of the three sampling shells (402) in a sliding mode, the upper portions of the three positioning frames (701) penetrate through the upper portions of the middle shell (2) and the lower portion of the upper shell (3), the arc-shaped plates (702) are respectively arranged on the upper portions of the three positioning frames (701), the three arc-shaped plates (702) are respectively in sliding fit with the upper shell (3), and the two reset springs (703) are respectively fixedly connected between the three arc-shaped plates (702) and the upper shell (3), a mounting disc (704) is mounted at the upper end of a first rotating shaft (501), a rotating rod (705) is connected at the center of the upper side face of the mounting disc (704), a positioning disc (706) is fixedly connected at the lower part of the rotating rod (705), three pushing frames (707) are arranged on the positioning disc (706) in a sliding mode in the circumferential direction at equal intervals, lower pressing discs (708) are fixedly connected among the lower parts of the three pushing frames (707), six springs are fixedly connected between the lower pressing discs (708) and the positioning disc (706), the six springs are respectively sleeved on the three pushing frames (707), three lower pressing rods (709) are connected with the lower part of the rotating rod (705) in the circumferential direction at equal intervals, the three lower pressing rods (709) are located between the lower pressing discs (708) and the positioning disc (706), the three lower pressing rods (709) are respectively located on the inner sides of adjacent pushing frames (707), downward spherical bulges are arranged on the outer portions of the lower side faces of the three lower pressing rods (709), grooves are formed in the lower parts of the three pushing frames (707), all slide in the recess on three pushing frame (707) and be equipped with locating piece (710), the outside of a plurality of locating piece (710) is spherical setting, the rigid coupling has the spring between a plurality of locating piece (710) adjacent pushing frame (707) respectively, a plurality of downwardly extending's locating hole (711) has been seted up to the side circumference equidistance of going up of mounting disc (704), the constant head tank has all been seted up to the pore wall both sides of a plurality of locating hole (711) on mounting disc (704), constant head tank and locating piece (710) cooperation on mounting disc (704).

9. The crude oil sampler with the stratified sampling function for the oil field according to claim 8 is characterized in that: the upper side of the arc-shaped plate (702) is gradually lowered from the middle part to two sides, and the upper side of the arc-shaped plate (702) is a smooth surface.

10. The crude oil sampler with the stratified sampling function for the oil field according to claim 8 is characterized in that: the spherical surfaces of the positioning blocks (710) are rough surfaces.