Oil tank multi-point sampler and sampling system
By designing a multi-point sampler and an automated sampling system for oil tanks, the problems of frequent oil tank sampling operations and cross-contamination were solved, and efficient, accurate collection and automated operation of multi-layer oil samples were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-20
AI Technical Summary
Existing technologies involve frequent sampling operations from oil tanks, which pose a risk of cross-contamination, reduce detection accuracy, and are labor-intensive.
Design a multi-point sampler for oil tanks, which adopts multiple independent sampling spaces and inlet/outlet structures, combined with electric valve control, and an automated traction component and control system to achieve automatic collection of multi-layer oil samples.
It enables independent collection of multi-layer oil samples, avoids cross-contamination, improves detection accuracy, reduces labor intensity, and increases automation.
Smart Images
Figure CN224019401U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of sampling equipment, especially to a kind of oil tank multi-point sampler and sampling system. BACKGROUND
[0002] Edible oil tank or other oil tank is used to store liquid oil, which needs to be sampled regularly to determine the quality of edible oil or other oil products. When sampling is performed, the oil products in different layers of the edible oil tank or other oil tank usually need to be sampled correspondingly.
[0003] In related technologies, sampling is performed by manually operating a sampler. When the sampler is operated to sample, it needs to be inserted into different heights for sampling multiple times, which makes it necessary to insert the sampler for sampling multiple times when sampling different layers, which easily causes cross-contamination risk, reduces the accuracy of sampling detection, and makes the operation frequent and labor-intensive. SUMMARY
[0004] The utility model provides a kind of oil tank multi-point sampler and sampling system to solve the defect that sampling operation is frequent in prior art, and cross-contamination risk is high, and detection accuracy decreases.
[0005] The utility model provides a kind of oil tank multi-point sampler in the first aspect, comprising: oil taking cylinder, the oil taking cylinder has oil storage space inside;Multiple partition plates are spaced apart in vertical direction in the oil storage space, and multiple partition plates divide the oil storage space into multiple independent sampling spaces, and each sampling space is provided with sample inlet and sample discharge port.
[0006] According to the oil tank multi-point sampler provided by the utility model, the position of the sample inlet is above the sample discharge port.
[0007] According to the oil tank multi-point sampler provided by the utility model, an electric valve is arranged at the sample inlet, and the electric valve is used to control the opening and closing of the sample inlet.
[0008] According to the oil tank multi-point sampler provided by the utility model, a fixed connection part is arranged at the top of the oil taking cylinder.
[0009] The utility model provides a kind of sampling system in the second aspect, comprising: stand, rocker arm, traction assembly and the oil tank multi-point sampler as described in any one of the above;The proximal end of the rocker arm is rotatably arranged at the top of the stand, and the distal end of the rocker arm is freely extended;The traction assembly is arranged on the rocker arm;The oil taking cylinder is connected with the traction assembly, and the traction assembly is used to drive the oil taking cylinder to move in vertical direction.
[0010] According to the sampling system provided by the utility model, the traction assembly includes a driving device, a cable reel, a traction cable and a guide mechanism; the guide mechanism is arranged at the distal end of the rocker arm, the cable reel is arranged at the proximal end of the rocker arm, the traction cable is wound on the cable reel, one end of the traction cable is led out by the guide mechanism and connected with the oil taking cylinder, and the output end of the driving device is connected with the cable reel to drive the rotation of the cable reel and realize the winding and unwinding of the traction cable.
[0011] According to the sampling system provided by the utility model, the guide mechanism includes a connecting shell and a positioning pulley, the connecting shell is connected with the rocker arm, the positioning pulley is located in the connecting shell, and the traction cable is wound on the positioning pulley.
[0012] According to the sampling system provided by the utility model, a oil scraper is further arranged in the connecting shell, and the traction cable is arranged in the oil scraper.
[0013] According to the sampling system provided by the utility model, a controller and an origin positioning assembly are further arranged, the origin positioning assembly is arranged in the connecting shell and located below the positioning pulley;
[0014] The origin positioning assembly and the driving device are electrically connected with the controller, and the controller is used for controlling the action of the driving device; the origin positioning assembly includes an origin positioner and an origin identification part, the traction cable is arranged in the origin positioner, and the origin identification part is fixedly arranged on the traction cable to realize origin positioning by the contact between the origin identification part and the origin positioner.
[0015] According to the sampling system provided by the utility model, a sampling pipeline is further arranged, the sampling pipeline is located at one side of the stand column, a sampling window for collecting sample oil is arranged on the pipe body near the bottom of the sampling pipeline; an oil discharge pipeline is further arranged at the bottom of the sampling pipeline, the oil discharge pipeline is located below the sampling window, and a residual oil collecting cylinder is communicated with the bottom of the oil discharge pipeline.
[0016] The oil tank multi-point sampler and the sampling system provided by the utility model are characterized in that a plurality of sampling spaces are arranged in the sampler, sample oil collection can be realized in each space independently, sample oil collection of multiple layers can be realized in one operation, and the operation times are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 is a specific structure schematic diagram of the oil tank multi-point sampler provided by the present application.
[0019] Figure 2 is one of the overall structure schematic diagrams of the sampling system provided by the present application.
[0020] Figure 3 is the second overall structure schematic diagram of the sampling system provided by the present application.
[0021] Figure 4 is one of the sampling process state schematic diagrams of the sampling system provided by the present application.
[0022] Figure 5 is the second sampling process state schematic diagram of the sampling system provided by the present application.
[0023] Figure 6 is a structure schematic diagram of the sampling pipeline in the sampling system provided by the present application.
[0024] Reference signs:
[0025] 10, multi-point sampler; 11, oil taking cylinder; 111, sampling space; 112, sample inlet; 113, sample outlet; 12, partition plate; 13, fixed connection part; 14, electric valve; 15, sealing end cover; 20, stand column; 30, rotary mechanism; 40, rocker arm; 50, traction assembly; 51, cable reel; 52, traction cable; 53, guide mechanism; 531, positioning pulley; 532, oil scraper; 54, origin positioning assembly; 541, origin positioner; 542, origin identification part; 55, driving device; 60, sampling pipeline; 61, sampling window; 62, oil discharge pipeline; 70, residual oil collection cylinder. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.
[0027] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying 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 therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0029] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0030] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.
[0031] The following will be described in conjunction with Figure 1The utility model discloses a kind of oil tank multi-point sampler 10, including oil taking cylinder 11, oil taking cylinder 11 has oil storage space inside;Multiple partition plates 12 are spaced apart in vertical direction in oil storage space, and multiple partition plates 12 divide oil storage space into multiple independent sampling spaces 111, every sampling space 111 is provided with sample inlet 112 and sample outlet 113.In the sampling detection of edible oil or other oil products in oil tank, sampling detection needs to be carried out to the oil liquid of different layers in oil tank, in the embodiment, every independent sampling space 111 is provided with sample inlet 112 and sample outlet 113, so that every sampling space 111 can be independently sampled and detected, realize multi-layer oil sample collection in one operation, improve the efficiency of sampling, simplify the operation of sampling.
[0032] Specifically, oil taking cylinder 11 is integrally configured as cylindrical structure, and the internal oil storage space is in airtight state.Oil liquid enters sampling space 111 through sample inlet 112, and the oil sample in sampling space 111 is taken out through sample outlet 113.
[0033] Among them, sample inlet 112 and sample outlet 113 can be installed valve and other structures, realize the opening or closing of sample inlet 112 and sample outlet 113, so that sample inlet 112 can be closed after every layer of oil sample is sampled, to avoid the outflow of oil liquid in sampling space 111.When oil sample needs to be taken out, open sample outlet 113 to take out oil sample.
[0034] In combination with the above embodiment, the position of sample inlet 112 is above sample outlet 113.Sample inlet 112 is used for oil liquid to enter, and sample outlet 113 is used for oil liquid to be taken out when oil is taken out, and the embodiment can realize stable storage of sampling oil liquid by arranging sample inlet 112 above sample outlet 113.
[0035] As shown in Figure 1 Each sample inlet 112 is arranged at the top of the corresponding sampling space 111, each sample outlet 113 is arranged at the bottom of the corresponding sampling space 111, and the position of sample outlet 113 is close to partition plate 12, so as to facilitate the outflow of oil liquid in sampling space 111, and avoid the residue of oil liquid in sampling space 111.
[0036] Of course, in some embodiments, partition plate 12 can be arranged in an inclined state, and the position of sample outlet 113 is arranged at the bottom of the inclined partition plate 12, so as to facilitate the rapid outflow of oil sample and avoid the residue of oil liquid in sampling space 111 after sampling.
[0037] In combination with the above embodiment, the sample inlet 112 is provided with an electric valve 14 for controlling the opening and closing of the sample inlet 112. The electric valve 14 is arranged to be controlled by an external electric signal to open and close, so that the corresponding valve can be opened during the layer-by-layer sampling process, so that the sampling of each layer of the sampling space can be realized during one lowering operation.
[0038] Specifically, the electric valve 14 is electrically connected with a controller, which can open the valve to realize oil feeding after the oil taking cylinder 11 is extended to the designated position, so as to realize automatic sampling operation.
[0039] Specifically, a sealing end cover 15 is arranged in the sample discharge port 113, which is connected with the body of the oil taking cylinder 11 and can realize the opening and closing of the sample discharge port 113. One end of the sealing end cover 15 is provided with a threaded section, and an internal thread is arranged in the sample discharge port 113, and the sealing end cover 15 is connected with the internal thread through the threaded section. In combination with the above embodiment, the top of the oil taking cylinder 11 is provided with a fixed connection part 13. The oil taking cylinder 11 needs to be extended into the oil tank in combination with external equipment, and in the embodiment, the fixed connection part 13 is arranged to realize the connection with external equipment (such as lifting actuator, manual operating rod, etc.) through the fixed connection part 13, which is beneficial to quick connection. That is, the fixed connection part is arranged on the oil taking cylinder to realize quick connection, so as to extend the oil taking cylinder into the oil tank to realize sampling operation.
[0040] In combination with the above embodiment, the fixed connection part 13 can be connected with a longer extension rod, so as to extend into the oil tank, and the extension rod can be manually held during operation to extend the oil taking cylinder into the oil tank to realize sampling operation. Of course, the oil taking cylinder 11 can also be connected with a lifting device to realize automatic lifting operation, so as to extend the oil taking cylinder 11 into the oil tank to realize automatic sampling.
[0041] The fixed connection part 13 is connected with the outer shell of the oil taking cylinder, and can be connected in a fixed connection manner, such as integral molding, welding, etc., or can be connected in a detachable connection manner, such as one of bolt connection, clamping, threaded connection, etc.
[0042] Specifically, as shown in FIG. 6, the fixed connection part 13 is connected with the outer shell of the oil taking cylinder in a detachable manner, and the fixed connection part 13 is provided with a threaded section, and the outer shell of the oil taking cylinder is provided with an internal thread corresponding to the threaded section, so as to realize the connection of the fixed connection part 13 with the outer shell of the oil taking cylinder through the threaded section and the internal thread. Figure 1As shown, the partition plate 12 is provided with two, and the two partition plates 12 divide the oil storage space into three independent sampling spaces 111, and the limitation of the three sampling spaces 111 can meet the needs of most sampling operations. In specific operation: the oil cylinder reaches the lower end of the first sampling depth corresponding to the first electromagnetic valve at the bottom end, the oil inlet valve is opened, the oil flows into the sampling space 111, and after a certain time, the oil inlet valve is closed. Then the oil cylinder is further lowered and reaches the second electromagnetic valve in the middle of the second sampling point, the oil is taken out, and after a certain time, the oil inlet valve is closed. The oil tank continues to descend to the third electromagnetic valve at the uppermost layer of the third sampling point, the oil is taken out, and after a certain time, the oil inlet valve is closed, and after the oil inlet valve is closed, the whole oil cylinder is taken out, and the sampling operation is completed.
[0043] Next, a kind of sampling system provided by the utility model is described, as shown in Figures 2-4 As shown, the sampling system includes a stand 20, a swing arm 40, a traction assembly 50, a sampling pipeline 60 and an oil tank multi-point sampler 10 provided by any one of the above embodiments; the proximal end of the swing arm 40 is rotatably arranged at the top of the stand 20, and the distal end of the swing arm 40 freely extends; the traction assembly 50 is arranged on the swing arm 40; the oil tank 11 is connected with the traction assembly 50, and the traction assembly 50 is used to drive the oil tank 11 to move in the vertical direction; the sampling pipeline 60 is located on one side of the stand 20, and a sampling window 61 for collecting oil samples is arranged on the pipe body near the bottom of the sampling pipeline 60. Conventional sampling is performed by manually holding the sampler, which can result in low height accuracy of the oil sample layer. In the present embodiment, the oil tank 11 is connected with the traction assembly 50, and automatic operation of the oil tank 11 is realized, which reduces the safety risk of operation, reduces the labor intensity of manual labor, and improves the automation degree of sampling compared with the manual operation at a high position in the related art.
[0044] Specifically, one end of the swing arm 40 close to the stand 20 is the proximal end, and the other end away from the stand 20 is the distal end, the proximal end of the swing arm 40 is connected with the stand 20 through a rotary mechanism 30, and the rotary mechanism 30 realizes the horizontal rotation of the swing arm 40. The traction assembly 50 is connected with the oil tank 11, and the connection with the oil tank 11 realizes the control of the lifting of the oil tank 11, so as to realize the automatic collection of the oil sample. The sampling pipeline 60 is arranged on one side of the stand 20, which realizes the taking out of the oil sample, and improves the efficiency and position accuracy of the whole sampling through the automatic collection compared with the manual collection according to experience in the related art.
[0045] It can be understood that the stand 20 can be fixedly connected on a sampling platform, the ground or other equipment, and the traction assembly 50 can control the stroke of the oil tank 11, so as to realize the accurate control of the lifting of the oil tank 11 and improve the accuracy of the collection of the layered oil sample in the oil tank.
[0046] In combination with the above embodiments, as shown in Figure 2 , Figure 3 The traction assembly 50 includes a driving device 55, a cable reel 51, a traction cable 52, and a guide mechanism 53. The guide mechanism 53 is arranged at the distal end of the rocker arm 40, the cable reel 51 is arranged at the proximal end of the rocker arm 40, the traction cable 52 is wound around the cable reel 51, one end of the traction cable 52 is led out by the guide mechanism 53 and connected to the oil extraction cylinder 11, and the output end of the driving device 55 is connected to the cable reel 51 to drive the cable reel 51 to rotate and realize the winding and unwinding of the traction cable 52. The end of the traction cable 52 is connected to the oil extraction cylinder 11, so that the lifting of the oil extraction cylinder 11 can be realized in the process of winding and unwinding of the traction cable 52.
[0047] Specifically, the driving device 55 is a stepping motor, which can realize precise control of its stroke. The cable reel 51 is used for winding and storing the traction cable 52, and the guide mechanism 53 is used for guiding the traction cable 52 to extend towards the vertical downward direction, so that the oil extraction cylinder 11 can be located in the vertical direction and realize the vertical up-and-down movement of the oil extraction cylinder 11.
[0048] In a specific implementation, the guide mechanism 53 includes a connecting shell and a positioning pulley 531. The connecting shell is connected to the rocker arm 40, and the positioning pulley 531 is located in the connecting shell and the traction cable 52 is wound around the positioning pulley 531. The traction cable 52 is used to pull the oil extraction cylinder 11 and realize its up-and-down movement by winding and unwinding of the traction cable 52. In this embodiment, the positioning pulley 531 is arranged to guide the traction cable 52 to extend from the horizontal to the vertical direction, so that the oil extraction cylinder 11 can move in the vertical direction.
[0049] Specifically, the connecting shell has an installation space inside, and the positioning pulley 531 is arranged in the installation space. An opening structure is arranged on one side and the bottom of the connecting shell to facilitate the passing of the traction cable 52. The positioning pulley 531 is arranged to realize the smooth movement of the traction cable 52 and reduce the wear of the traction cable 52.
[0050] In some specific embodiments, the connecting shell further has an oil scraper 532, and the traction cable 52 passes through the oil scraper 532. The oil scraper 532 is commonly used in conventional technology, which scrapes the oil residue on the traction cable 52 to avoid the oil residue on the traction cable 52, which may cause dripping and affect the working environment.
[0051] Specifically, the oil scraper 532 includes two oppositely arranged oil scraping plates, and the two oil scraping plates have a gap for the traction cable 52 to pass through. The plate body of the oil scraping plate has a flexible layer for absorbing oil. When scraping is needed, the two oil scraping plates are driven to approach each other to contact the traction cable 52 to realize oil scraping, and when oil scraping is not needed, the two oil scraping plates are driven to move away from each other.
[0052] It can be understood that in the process of sampling the oil sample, a part of the towing cable 52 will extend into the oil tank, and the oil during the sampling process is usually not treated in the related art, which will cause waste of residual oil and affect the working environment due to oil droplets. In the embodiment, the oil is scraped off during the towing cable recovery process by the oil scraper 532, avoiding the waste of oil and the impact on the working environment.
[0053] In a specific embodiment, the sampling system further comprises a controller and an origin positioning assembly 54, which is arranged in the connecting shell and below the positioning pulley 531; the origin positioning assembly 54 and the driving device 55 are electrically connected with the controller, and the controller is used to control the driving device 55 to act; the origin positioning assembly 54 comprises an origin positioner 541 and an origin identification part 542, the towing cable 52 is arranged in the origin positioner 541, and the origin identification part 542 is fixedly arranged on the towing cable 52 to realize the origin positioning by the contact between the origin identification part 542 and the origin positioner 541. The movement distance of the oil taking cylinder 11 in the vertical direction needs to be accurately controlled, and in the embodiment, the accurate positioning of the movement stroke of the towing cable 52 can be realized by the arrangement of the origin positioning assembly 54, so as to control the lifting distance of the oil taking cylinder 11.
[0054] Specifically, the origin positioner 541 is fixedly arranged in the connecting shell, and the origin identification part 542 is fixedly arranged on the towing cable 52, and an electrical signal can be generated when the origin identification part 542 contacts the origin positioner 541, and the controller receives the signal and indicates that the oil taking cylinder 11 reaches the origin position at this time. Further, in combination with the control of the movement stroke of the stepping motor, the control of the movement position of the oil taking cylinder 11 is realized, so that it can accurately reach the sampling point and realize the precise sampling of each layer.
[0055] As Figure 4 , Figure 5As shown, when sampling is specifically performed, first, the system is self-checked, the traction cable 52 is moved by the stepper motor, so that the origin mark part 542 is returned to the origin position, the sensor on the origin positioner 541 scans to confirm that the origin mark part 542 is located at the origin position, and after confirmation, the device is ready. Input three collection point depths into the controller, and after completion. The stepper motor working system starts to calculate the descending depth, and when the collection depth is reached, the stepper motor stops working, and the multi-section oil taking cylinder 11 starts to collect samples. After all the samples are collected, the stepper motor is reversed, so that the traction cable 52 drives the multi-section oil taking cylinder 11 to rise, and after a certain time, the oil scraper 532 works, the relative oil scraping plates approach each other and contact the traction cable 52 to start scraping oil. When the origin mark part 542 reaches the origin, the sensor on the origin positioner 541 scans to confirm that the origin mark part 542 reaches the origin, and the oil scraper 532 moves away from each other, so that the oil scraping plate is opened and the oil scraping operation is stopped. Then, when the oil extraction is completed, the swing arm is rotated 180 degrees under the drive of the rotating mechanism 30, and the multi-section oil taking cylinder 11 is sent into the sampling pipeline 60, and the oil taking cylinder 11 is lowered by the stepper motor to reach the sampling window 61 at the bottom of the oil tank. The oil in the sampling space 111 is discharged by opening the sealing end cover 15 at the sampling window 61. As Figure 6 As shown, in some embodiments, the bottom of the sampling pipeline 60 is also provided with an oil discharge pipeline 62, and the bottom of the oil discharge pipeline 62 is communicated with a residual oil collection cylinder 70. After the oil sample is sampled and taken out, there will be oil liquid remaining on the outer wall of the oil taking cylinder 11 and in the sampling space 111, which will drop into the sampling pipeline 60. In this embodiment, the dropped oil liquid is discharged through the oil discharge pipeline 62, and the discharged oil liquid is collected through the residual oil collection cylinder 70, avoiding pollution to the environment around the sampling pipeline and facilitating management of the dropped oil liquid.
[0056] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can realize oil sample collection independently in each space through the arrangement of multiple sampling spaces 111 in the sampler, so that multiple layers of oil samples can be collected in one operation, reducing the number of operations. And the independent arrangement of the sample inlet 112 and the sample discharge port 113 in each sampling space 111 makes each layer sample independently, avoiding cross contamination in the sampling process. Further, through the arrangement of the rocker arm 40 and the sampling pipeline 60, automatic sampling operation can be realized, improving the overall automation degree, reducing high-altitude operation, reducing labor intensity, and improving sampling operation efficiency.
[0057] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.
Claims
1. A multi-point sampler for oil tanks, characterized in that, include: An oil sampling cylinder, wherein the oil sampling cylinder has an oil storage space; The oil storage space is provided with multiple dividing plates at intervals in the vertical direction, and the multiple dividing plates divide the oil storage space into multiple independent sampling spaces. Each sampling space is provided with a sampling port and a sampling outlet.
2. The multi-point sampler for oil tanks according to claim 1, characterized in that, The inlet is located above the outlet.
3. The multi-point sampler for oil tanks according to claim 1, characterized in that, An electric valve is provided at the injection port, which is used to control the opening and closing of the injection port.
4. The multi-point sampler for oil tanks according to claim 1, characterized in that, The top of the oil sampling cylinder is provided with a fixed connection part.
5. A sampling system, characterized in that, include: Columns; A rocker arm, the proximal end of which is rotatably mounted on the top of the column, and the distal end of which extends freely. A traction assembly, wherein the traction assembly is disposed on the rocker arm; The oil tank multi-point sampler as described in any one of claims 1-4, wherein the oil sampling cylinder is connected to the traction assembly, and the traction assembly is used to drive the oil sampling cylinder to move in the vertical direction.
6. The sampling system according to claim 5, characterized in that, The traction assembly includes a drive unit, a cable reel, a traction cable, and a guide mechanism; The guiding mechanism is located at the far end of the rocker arm, the cable reel is located at the near end of the rocker arm, the traction cable is wound around the cable reel, and one end of the traction cable is led out by the guiding mechanism and connected to the oil tapping cylinder. The output end of the driving device is connected to the cable reel to drive the cable reel to rotate and realize the winding and unwinding of the traction cable.
7. The sampling system according to claim 6, characterized in that, The guiding mechanism includes a connecting housing and a positioning pulley. The connecting housing is connected to the rocker arm, the positioning pulley is located inside the connecting housing, and the traction cable is wound around the positioning pulley.
8. The sampling system according to claim 7, characterized in that, The connecting housing is also equipped with an oil scraper, and the traction cable passes through the oil scraper.
9. The sampling system according to claim 8, characterized in that, It also includes a controller and an origin positioning component, the origin positioning component being disposed inside the connecting housing and located below the positioning pulley; Both the origin positioning component and the driving device are electrically connected to the controller, and the controller is used to control the operation of the driving device. The origin positioning component includes an origin locator and an origin marker. The traction cable passes through the origin locator, and the origin marker is fixed on the traction cable so that origin positioning is achieved by the origin marker contacting the origin locator.
10. The sampling system according to claim 5, characterized in that, It also includes a sampling pipe, which is located on one side of the column, and a sampling window for collecting sample oil is opened on the pipe body near the bottom of the sampling pipe; The bottom of the sampling pipe is also provided with an oil drain pipe, which is located below the sampling window and is connected to a residual oil collection cylinder at the bottom of the oil drain pipe.