An in-tank powered oil sampling device
By designing a distributed power architecture and a three-channel composite pipeline, the problem of deep sampling of petroleum and liquid chemical products has been solved, achieving precise control and safe deep sampling, reducing costs and improving adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGKE YANGYOU (JIANGSU) PETROCHEMICAL EQUIPMENT TECHNOLOGY CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-21
AI Technical Summary
Existing petroleum and liquid chemical product storage tank sampling technologies suffer from problems such as difficulty in accurately controlling sampling depth, high risk of sample stratification or contamination, high safety hazards, poor adaptability, and high manufacturing costs, especially when sampling deep liquids.
It adopts a distributed power architecture, and through an external pneumatic-hydraulic energy conversion unit and a three-channel composite pipeline, combined with an in-tank miniaturized hydraulic drive system, it realizes high-pressure power lossless transmission and deep sampling.
It achieves precise control and safety in deep sampling, reduces manufacturing costs, and improves the adaptability and safety of the sampling device.
Smart Images
Figure CN224535514U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sampling equipment for petroleum and liquid chemical products, and in particular to an oil sampling device with built-in power in a tank. Background Technology
[0002] Sampling from storage tanks for petroleum and liquid chemical products is a critical step in the production, storage, transportation, and quality control processes. Currently, the sampling technologies commonly used in the industry suffer from the following technical challenges:
[0003] Manual sampling is the most basic sampling method, typically involving lowering a sampling rope or bottle from the top opening of the tank to the target depth. Traditional manual sampling relies on the operator's experience, making it difficult to precisely control sampling depth and speed, and easily leading to sample stratification or contamination. It is only suitable for sampling shallow liquids, and it is difficult to obtain representative samples from deep liquids in large tanks. In addition, manual operation poses serious safety hazards in toxic, harmful, flammable, or explosive environments. Electric submersible pump sampling technology has improved the sampling depth problem to some extent, but its application scope is limited. Furthermore, some oil tanks use a three-point sampling structure. While these structures can achieve simple multi-point sampling, they suffer from problems such as difficulty in adjusting the sampling position, maintenance difficulties, and poor adaptability. Moreover, these devices usually require complex transmission mechanisms or control systems at the bottom of the oil tank, which not only increases manufacturing costs but also affects the overall structure and operational safety of the oil tank. In existing patented technologies, some solutions attempt to improve sampling performance by improving the pump structure or optimizing the pipeline layout, but none of them fundamentally solve the contradiction between power transmission efficiency and adaptability to the tank environment. For example, while using an external pneumatic diaphragm pump avoids electrical risks, its suction lift cannot exceed 8 meters due to the working principle of the pneumatic diaphragm pump itself. At the same time, its suction lift is closely related to the local altitude; the higher the altitude, the lower the suction lift.
[0004] The core innovation of this invention lies in constructing a distributed power architecture: the pneumatic-hydraulic energy conversion unit is externalized to ensure safety, and a unique three-channel composite pipeline enables lossless transmission of high-pressure power. Simultaneously, a miniaturized hydraulic drive system is integrated inside the tank to directly act on the sampling terminal. This design retains the inherent safety characteristics of pneumatic systems while achieving the high efficiency and stability of hydraulic drives, providing a completely new technical approach for deep sampling. Utility Model Content
[0005] The purpose of this invention is to provide an oil sampling device with built-in power in a tank, which solves the problem of difficult deep sampling.
[0006] To achieve the above objectives, this utility model employs an oil sampling device with built-in power in a tank, comprising an oil tank and a built-in power sampling device. The built-in power sampling device includes an external main unit, an internal mechanism, and a traction and piping mechanism. The external main unit is detachably connected to the oil tank and located on the outer side of the oil tank. The internal mechanism is detachably connected to the oil tank and located on the inner side of the oil tank. One end of the traction and piping mechanism is detachably connected to the external main unit and located above the external main unit. The other end of the traction and piping mechanism is detachably connected to the internal mechanism and located above the internal mechanism.
[0007] The external main unit includes a controller, a traction device, a cover, a frame, and sampling bottles. The frame is detachably connected to the oil tank and is located on the outer side of the oil tank. The cover is detachably connected to the frame and is located above the frame. The controller is detachably connected to the cover and is located on the lower inner side of the cover. The traction device is detachably connected to the cover and is located inside the cover, with the traction device positioned on one side of the controller. The sampling bottles are detachably connected to the cover and are located inside the cover. Sampling screens are respectively positioned on one side of the controller and the traction device.
[0008] The controller includes a pneumatic-hydraulic pump station, a pneumatic-hydraulic pump inlet pipe, an oil extraction pipe, a high-pressure oil delivery pipe, and a high-pressure oil return pipe. The pneumatic-hydraulic pump station is detachably connected to the housing and located on the lower inner side of the housing. The pneumatic-hydraulic pump inlet pipe is detachably connected to the pneumatic-hydraulic pump station and located on one side of the pneumatic-hydraulic pump station. One end of the oil extraction pipe is detachably connected to the pneumatic-hydraulic pump station and located on the side of the pneumatic-hydraulic pump near the pneumatic-hydraulic pump inlet pipe. The other end of the oil extraction pipe is detachably connected to the sampling bottle and located on top of the sampling bottle. In this configuration, one end of the high-pressure oil pipeline is detachably connected to the pneumatic-hydraulic pump station and is located on one side of the pneumatic-hydraulic pump station. The high-pressure oil pipeline is perpendicular to the oil extraction pipeline. One end of the high-pressure oil return pipeline is detachably connected to the pneumatic-hydraulic pump station and is located on the side of the pneumatic-hydraulic pump station closer to the high-pressure oil pipeline. The high-pressure oil return pipeline is located below the high-pressure oil pipeline. The other ends of the high-pressure oil pipeline and the high-pressure oil return pipeline are detachably connected to the traction and pipeline mechanism and are located at the end of the traction and pipeline mechanism away from the tank mechanism.
[0009] The traction device includes a pneumatic motor and a rocker plate. The pneumatic motor is detachably connected to the cover and is located inside the cover on one side. The pneumatic motor is also located on one side of the controller. One side of the rocker plate is rotatably connected to the pneumatic motor and is located at the output end of the pneumatic motor. The other side of the rocker plate is detachably connected to the traction and piping mechanism and is located at the end of the traction and piping mechanism away from the internal tank mechanism.
[0010] The internal tank mechanism includes a tank flange, an internal traction rope, a three-in-one spiral pipe, a micro gear pump, and an oil extraction pump. The tank flange is detachably connected to the tank and located inside the tank. The end of the traction and piping mechanism away from the external main unit is detachably connected to the tank flange and located above the tank flange. The internal traction rope is detachably connected to the tank flange and located at the lower center of the tank flange. The micro gear pump is detachably connected to the internal traction rope and located below the internal traction rope. The three-in-one spiral pipe is disposed on the outer surface of the internal traction rope. The oil extraction pump is detachably connected to the micro gear pump and located below the micro gear pump.
[0011] The three-in-one spiral pipe includes an in-tank oil intake pipeline, an in-tank high-pressure oil delivery pipeline, and an in-tank high-pressure oil return pipeline. The in-tank oil intake pipeline is located on the outer surface of the in-tank traction rope, the in-tank high-pressure oil delivery pipeline is located on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil delivery pipeline is located on one side of the in-tank oil intake pipeline. The in-tank high-pressure oil return pipeline is located on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil return pipeline is also located on one side of the in-tank oil intake pipeline and one side of the in-tank high-pressure oil delivery pipeline.
[0012] The traction and piping mechanism includes a three-in-one straight pipe and an external traction rope. One end of the three-in-one straight pipe passes through the cover and is detachably connected to the high-pressure oil supply pipeline and the high-pressure oil return pipeline, and is located at one end of the high-pressure oil supply pipeline and the high-pressure oil return pipeline away from the pneumatic-hydraulic pump station. The other end of the three-in-one straight pipe passes through the oil tank flange and is detachably connected to the internal high-pressure oil supply pipeline and the internal high-pressure oil return pipeline, and is located at the end of the internal high-pressure oil supply pipeline and the internal high-pressure oil return pipeline away from the micro gear pump. One end of the external traction rope passes through the cover and is slidably connected to the rocker plate, and is located on the side of the rocker plate away from the pneumatic motor. The other end of the external traction rope passes through the oil tank flange and is fixedly connected to the internal traction rope, and is located above the internal traction rope.
[0013] This utility model discloses an oil sampling device with built-in power in a tank, comprising an oil tank and a built-in power sampling device. The built-in power sampling device includes an external main unit, an internal mechanism, and a traction and pipeline mechanism. The external main unit is detachably connected to the oil tank and located on the outer side of the oil tank. The internal mechanism is detachably connected to the oil tank and located on the inner side of the oil tank. One end of the traction and pipeline mechanism is detachably connected to the external main unit and located above the external main unit. The other end of the traction and pipeline mechanism is detachably connected to the internal mechanism and located above the internal mechanism. By adding the built-in power sampling device, the problem of difficult deep sampling of petroleum and liquid chemical products is effectively solved. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a perspective view of an oil sampling device with built-in power in a tank, according to the present invention.
[0016] Figure 2 This is a perspective view of the external main unit of an oil sampling device with built-in power in a tank, according to this utility model.
[0017] Figure 3 This is an enlarged perspective view of the external main unit components of an oil sampling device with built-in power in a tank, according to this utility model.
[0018] Figure 4 This is a perspective view of the internal mechanism of an oil sampling device with built-in power in a tank, according to the present invention.
[0019] Figure 5 This is a schematic diagram of the cross-section of the three-in-one spiral tube in an oil sampling device with built-in power in a tank, according to the present invention.
[0020] 1. Oil tank; 2. External main unit; 3. Internal mechanism; 4. Traction and pipeline mechanism; 2.1. Controller; 2.2. Traction device; 2.3. Cover; 2.4. Frame; 2.5. Sampling bottle; 2.1.1. Pneumatic-hydraulic pump station; 2.1.2. Pneumatic-hydraulic pump inlet pipeline; 2.1.3. High-pressure oil delivery pipeline; 2.1.4. High-pressure oil return pipeline; 2.1.5. Pneumatic motor; 2.2.1. Shaking plate; 2.2.2. Internal traction rope; 3.1. Three-in-one spiral pipe; 3.2. Internal oil delivery pipeline; 3.2.1. Internal high-pressure oil delivery pipeline; 3.2.2. Internal high-pressure oil return pipeline; 3.2.3. Micro gear pump; 3.3. Oil delivery shaking pump; 3.4. Oil tank flange; 3.5. Three-in-one straight pipeline; 4.1. External traction rope; 4.2. Detailed Implementation
[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0022] Please see Figures 1-5 , Figure 1 This is a perspective view of an oil sampling device with built-in power in a tank, according to the present invention. Figure 2 This is a perspective view of the external main unit of an oil sampling device with built-in power in a tank, according to this utility model. Figure 3 This is an enlarged perspective view of the external main unit components of an oil sampling device with built-in power in a tank, according to this utility model. Figure 4 This is a perspective view of the internal mechanism of an oil sampling device with built-in power in a tank, according to this utility model. Figure 5 This is a schematic diagram of the cross-section of the three-in-one spiral tube in an oil sampling device with built-in power in a tank, according to the present invention.
[0023] This utility model provides an oil sampling device with built-in power in a tank, including an oil tank 1 and a built-in power sampling device. The built-in power sampling device includes an external main unit 2, an internal mechanism 3, and a traction and pipeline mechanism 4. The external main unit 2 includes a controller 2.1, a traction device 2.2, a cover 2.3, a frame 2.4, and a sampling bottle 2.5. The controller 2.1 includes a pneumatic-hydraulic pump station 2.1.1, a pneumatic-hydraulic pump inlet pipeline 2.1.2, an oil sampling pipeline 2.1.3, a high-pressure oil delivery pipeline 2.1.4, and a high-pressure oil return pipeline 2.1.5. The traction device 2.2 includes a pneumatic motor 2.2.1 and a rocker 2.2.2. The internal mechanism 3 includes an oil tank flange 3.5, an internal traction rope 3.1, a three-in-one spiral pipe 3.2, a micro gear pump 3.3, and a sampling... The oil pump 3.4 and the three-in-one spiral pipe 3.2 include an in-tank oil intake pipeline 3.2.1, an in-tank high-pressure oil delivery pipeline 3.2.2, and an in-tank high-pressure oil return pipeline 3.2.3. The traction and pipeline mechanism 4 includes a three-in-one straight pipeline 4.1 and an external traction rope 4.2. This solution addresses the difficulty of deep sampling of petroleum and liquid chemical products. It is understood that during use, the aforementioned solution, upon entering the sampling operation stage, utilizes the pneumatic motor 2.2.1 to provide power via the traction device 2.2's rocker disc 2.2.2 to precisely control the raising and lowering of the external traction rope 4.2, thereby driving the in-tank mechanism 3 to descend through the flange opening 3.5 at the top of the oil tank 1 to the predetermined sampling depth position within the oil tank 1. To ensure accurate positioning of the sampling port of the oil extraction pump 3.4 in the tank-in-system 3, after positioning is completed, the pneumatic-hydraulic pump station 2.1.1 of the external main unit 2 is started. Compressed air enters the pneumatic-hydraulic pump station 2.1.1 through the pneumatic-hydraulic pump inlet pipe 2.1.2, driving the hydraulic oil to generate high pressure. The high-pressure oil is transmitted through the high-pressure oil delivery pipe 2.1.4, the three-in-one straight pipe 4.1, and the tank-in-system high-pressure oil delivery pipe 3.2.2 to the micro gear pump 3.3 inside the tank. The micro gear pump 3.3 converts hydraulic energy into mechanical energy, driving the oil extraction pump 3.4 to work. The oil extraction pump 3.4 generates negative pressure, sucking up the oil in the oil tank 1. The collected oil sample is then transported through the tank-in-system oil extraction pipe. 3.2.1 The three-in-one straight pipeline 4.1 and the oil collection pipeline 2.1.3 deliver oil to the sampling bottle 2.5. The return oil from the micro gear pump 3.3 after operation is transmitted back to the pneumatic-hydraulic pump station 2.1.1 through the high-pressure return oil pipeline 3.2.3, the three-in-one straight pipeline 4.1, and the high-pressure return oil pipeline 2.1.5, forming a circulating pipeline system to ensure a continuous and stable power supply throughout the sampling process. After one sampling is completed, if sampling is required at different locations or depths, the position of the internal mechanism 3 can be adjusted again using the traction device 2.2, and the above operation can be repeated. If the sampling work is completed, the pneumatic-hydraulic pump station 2.1.1 is turned off, and the internal mechanism 3 is retracted using the traction device 2.2, thus completing the use of the equipment.
[0024] In this specific embodiment, the external host 2 is detached from the oil tank 1 and located on the outer side of the oil tank 1; the internal mechanism 3 is detached from the oil tank 1 and located on the inner side of the oil tank 1; one end of the traction and pipeline mechanism 4 is detached from the external host 2 and located above the external host 2; the other end of the traction and pipeline mechanism 4 is detached from the internal mechanism 3 and located above the internal mechanism 3.
[0025] The frame 2.4 is detachably connected to the oil tank 1 and is located on the outer side of the oil tank 1. The cover 2.3 is detachably connected to the frame 2.4 and is located above the frame 2.4. The controller 2.1 is detachably connected to the cover 2.3 and is located on the lower inner side of the cover 2.3. The traction device 2.2 is detachably connected to the cover 2.3 and is located inside the cover 2.3, and the traction device 2.2 is located on one side of the controller 2.1. The sampling bottle 2.5 is detachably connected to the cover 2.3 and is located inside the cover 2.3. The sampling bottle 2.5 is located on one side of the controller 2.1 and the traction device 2.2.
[0026] Secondly, the pneumatic hydraulic pump station 2.1.1 is detached from the housing 2.3 and located below the inside of the housing 2.3. The pneumatic hydraulic pump inlet pipe 2.1.2 is detached from the pneumatic hydraulic pump station 2.1.1 and located on one side of the pneumatic hydraulic pump station 2.1.1. One end of the oil collection pipe 2.1.3 is detached from the pneumatic hydraulic pump station 2.1.1 and located on the side of the pneumatic hydraulic pump station 2.1.1 near the pneumatic hydraulic pump inlet pipe 2.1.2. The other end of the oil collection pipe 2.1.3 is detached from the sampling bottle 2.5 and located above the sampling bottle 2.5. One end of the high-pressure oil delivery pipe 2.1.4 is connected to the pneumatic hydraulic pump... Station 2.1.1 is disassembled and connected, and is located on one side of the pneumatic hydraulic pump station 2.1.1. The high-pressure oil delivery pipeline 2.1.4 is set perpendicular to the oil production pipeline 2.1.3. One end of the high-pressure oil return pipeline 2.1.5 is disassembled and connected to the pneumatic hydraulic pump station 2.1.1, and is located on the side of the pneumatic hydraulic pump station 2.1.1 close to the high-pressure oil delivery pipeline 2.1.4. The high-pressure oil return pipeline 2.1.5 is located below the high-pressure oil delivery pipeline 2.1.4. The other ends of the high-pressure oil delivery pipeline 2.1.4 and the high-pressure oil return pipeline 2.1.5 are disassembled and connected to the traction and pipeline mechanism 4, and are located at the end of the traction and pipeline mechanism 4 away from the tank mechanism 3.
[0027] Meanwhile, the pneumatic motor 2.2.1 is detachably connected to the cover 2.3 and is located inside the cover 2.3. The pneumatic motor 2.2.1 is located on one side of the controller 2.1. One side of the rocker plate 2.2.2 is rotatably connected to the pneumatic motor 2.2.1 and is located at the output end of the pneumatic motor 2.2.1. The other side of the rocker plate 2.2.2 is detachably connected to the traction and pipeline mechanism 4 and is located at the end of the traction and pipeline mechanism 4 away from the tank mechanism 3.
[0028] In addition, the oil tank flange 3.5 is detached from the oil tank 1 and located inside the oil tank 1. The end of the traction and pipeline mechanism 4 away from the external host 2 is detached from the oil tank flange 3.5 and located above the oil tank flange 3.5. The internal traction rope 3.1 is detached from the oil tank flange 3.5 and located at the lower center of the oil tank flange 3.5. The micro gear pump 3.3 is detached from the internal traction rope 3.1 and located below the internal traction rope 3.1. The three-in-one spiral pipe 3.2 is disposed on the outer surface of the internal traction rope 3.1. The oil extraction pump 3.4 is detached from the micro gear pump 3.3 and located below the micro gear pump 3.3.
[0029] The oil production pipeline 3.2.1 is located on the outer surface of the traction rope 3.1 inside the tank, the high-pressure oil delivery pipeline 3.2.2 is located on the outer surface of the traction rope 3.1 inside the tank, and the high-pressure oil delivery pipeline 3.2.2 is located on one side of the oil production pipeline 3.2.1 inside the tank. The high-pressure oil return pipeline 3.2.3 is located on the outer surface of the traction rope 3.1 inside the tank, and the high-pressure oil return pipeline 3.2.3 is also located on one side of the oil production pipeline 3.2.1 inside the tank and on one side of the high-pressure oil delivery pipeline 3.2.2 inside the tank.
[0030] One end of the three-in-one straight pipe 4.1 passes through the casing 2.3 and is detachably connected to the high-pressure oil supply pipe 2.1.4 and the high-pressure oil return pipe 2.1.5, respectively, and is located at the end of the high-pressure oil supply pipe 2.1.4 and the high-pressure oil return pipe 2.1.5 away from the pneumatic hydraulic pump station 2.1.1. The other end of the three-in-one straight pipe 4.1 passes through the oil tank flange 3.5 and is detachably connected to the high-pressure oil supply pipe 3.2.2 and the high-pressure oil return pipe 3.2.3 inside the tank, respectively. The external traction rope 4.2 is located at the end of the high-pressure oil supply line 3.2.2 and the high-pressure oil return line 3.2.3 inside the tank away from the micro gear pump 3.3. One end of the external traction rope 4.2 passes through the cover 2.3 and is slidably connected to the rocker plate 2.2.2, and is located on the side of the rocker plate 2.2.2 away from the pneumatic motor 2.2.1. The other end of the external traction rope 4.2 passes through the oil tank flange 3.5 and is fixedly connected to the internal traction rope 3.1, and is located above the internal traction rope 3.1.
[0031] When using this utility model, in the sampling operation stage, the pneumatic motor 2.2.1 provides power through the rocker disc 2.2.2 of the traction device 2.2 to precisely control the raising and lowering of the external traction rope 4.2, thereby driving the internal mechanism 3 to be lowered through the flange opening 3.5 at the top of the oil tank 1 to the predetermined sampling depth position inside the oil tank 1. This ensures that the sampling port of the oil sampling rocker pump 3.4 in the internal mechanism 3 is accurately positioned. After positioning, the pneumatic hydraulic pump station 2.1.1 of the external host 2 is started. Compressed air enters the pneumatic hydraulic pump station 2.1.1 through the pneumatic hydraulic pump inlet pipe 2.1.2, driving the hydraulic oil to generate high pressure. The high-pressure oil is transmitted through the high-pressure oil pipeline 2.1.4, the three-in-one straight pipeline 4.1, and the internal high-pressure oil pipeline 3.2.2 to the micro gear pump 3.3 inside the tank. The micro gear pump 3.3 converts hydraulic energy into... Mechanical energy drives the oil extraction pump 3.4 to operate. The oil extraction pump 3.4 generates negative pressure to draw oil from the oil tank 1. The collected oil sample is transported to the sampling bottle 2.5 through the in-tank oil extraction pipeline 3.2.1, the three-in-one straight pipeline 4.1, and the oil extraction pipeline 2.1.3. The return oil from the micro gear pump 3.3 is transmitted back to the pneumatic-hydraulic pump station 2.1.1 through the in-tank high-pressure return oil pipeline 3.2.3, the three-in-one straight pipeline 4.1, and the high-pressure return oil pipeline 2.1.5, forming a circulation pipeline system to ensure a continuous and stable power supply throughout the sampling process. After one sampling is completed, if sampling is required at different locations or depths, the position of the in-tank mechanism 3 is adjusted again using the traction device 2.2, and the above operation is repeated. When the sampling work is completed, the pneumatic-hydraulic pump station 2.1.1 is turned off, and the in-tank mechanism 3 is retracted using the traction device 2.2, completing the equipment use.
[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. An oil sampling device with built-in power, comprising an oil tank, characterized in that, It also includes a built-in power sampling device, which includes an external main unit, an internal mechanism, and a traction and pipeline mechanism. The external main unit is detachably connected to the oil tank and is located on the outer side of the oil tank. The internal mechanism is detachably connected to the oil tank and is located on the inner side of the oil tank. One end of the traction and pipeline mechanism is detachably connected to the external main unit and is located above the external main unit. The other end of the traction and pipeline mechanism is detachably connected to the internal mechanism and is located above the internal mechanism.
2. The oil sampling device with built-in power in the tank as described in claim 1, characterized in that, The external main unit includes a controller, a traction device, a cover, a frame, and sampling bottles. The frame is detachably connected to the oil tank and is located on the outer side of the oil tank. The cover is detachably connected to the frame and is located above the frame. The controller is detachably connected to the cover and is located on the lower inner side of the cover. The traction device is detachably connected to the cover and is located inside the cover, and the traction device is located on one side of the controller. The sampling bottles are detachably connected to the cover and are located inside the cover. Sampling screens are respectively located on one side of the controller and the traction device.
3. The oil sampling device with built-in power in the tank as described in claim 2, characterized in that, The controller includes a pneumatic-hydraulic pump station, a pneumatic-hydraulic pump inlet pipe, an oil extraction pipe, a high-pressure oil delivery pipe, and a high-pressure oil return pipe. The pneumatic-hydraulic pump station is detachably connected to the housing and located below one side of the inside of the housing. The pneumatic-hydraulic pump inlet pipe is detachably connected to the pneumatic-hydraulic pump station and located to one side of the pneumatic-hydraulic pump station. One end of the oil extraction pipe is detachably connected to the pneumatic-hydraulic pump station and located on the side of the pneumatic-hydraulic pump near the pneumatic-hydraulic pump inlet pipe. The other end of the oil extraction pipe is detachably connected to the sampling bottle and located above the sampling bottle. One end of the high-pressure oil pipeline is detachably connected to the pneumatic-hydraulic pump station and is located on one side of the pneumatic-hydraulic pump station. The high-pressure oil pipeline is perpendicular to the oil production pipeline. One end of the high-pressure oil return pipeline is detachably connected to the pneumatic-hydraulic pump station and is located on the side of the pneumatic-hydraulic pump station close to the high-pressure oil pipeline. The high-pressure oil return pipeline is located below the high-pressure oil pipeline. The other ends of the high-pressure oil pipeline and the high-pressure oil return pipeline are detachably connected to the traction and pipeline mechanism and are located at the end of the traction and pipeline mechanism away from the tank mechanism.
4. The oil sampling device with built-in power in the tank as described in claim 3, characterized in that, The traction device includes a pneumatic motor and a rocker plate. The pneumatic motor is detachably connected to the cover and is located inside the cover on one side. The pneumatic motor is also located on one side of the controller. One side of the rocker plate is rotatably connected to the pneumatic motor and is located at the output end of the pneumatic motor. The other side of the rocker plate is detachably connected to the traction and piping mechanism and is located at the end of the traction and piping mechanism away from the internal tank mechanism.
5. The oil sampling device with built-in power in the tank as described in claim 4, characterized in that, The internal tank mechanism includes a tank flange, an internal traction rope, a three-in-one spiral pipe, a micro gear pump, and an oil extraction pump. The tank flange is detachably connected to the tank and located inside the tank. The end of the traction and piping mechanism away from the external main unit is detachably connected to the tank flange and located above the tank flange. The internal traction rope is detachably connected to the tank flange and located below the center of the tank flange. The micro gear pump is detachably connected to the internal traction rope and located below the internal traction rope. The three-in-one spiral pipe is disposed on the outer surface of the internal traction rope. The oil extraction pump is detachably connected to the micro gear pump and located below the micro gear pump.
6. The oil sampling device with built-in power in the tank as described in claim 5, characterized in that, The three-in-one spiral pipe includes an in-tank oil intake pipeline, an in-tank high-pressure oil delivery pipeline, and an in-tank high-pressure oil return pipeline. The in-tank oil intake pipeline is located on the outer surface of the in-tank traction rope, the in-tank high-pressure oil delivery pipeline is located on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil delivery pipeline is located on one side of the in-tank oil intake pipeline. The in-tank high-pressure oil return pipeline is located on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil return pipeline is also located on one side of the in-tank oil intake pipeline and one side of the in-tank high-pressure oil delivery pipeline.
7. The oil sampling device with built-in power in the tank as described in claim 6, characterized in that, The traction and piping mechanism includes a three-in-one straight pipe and an external traction rope. One end of the three-in-one straight pipe passes through the cover and is detachably connected to the high-pressure oil supply pipeline and the high-pressure oil return pipeline, and is located at one end of the high-pressure oil supply pipeline and the high-pressure oil return pipeline from the pneumatic-hydraulic pump station. The other end of the three-in-one straight pipe passes through the oil tank flange and is detachably connected to the internal high-pressure oil supply pipeline and the internal high-pressure oil return pipeline, and is located at the end of the internal high-pressure oil supply pipeline and the internal high-pressure oil return pipeline away from the micro gear pump. One end of the external traction rope passes through the cover and is slidably connected to the rocker plate, and is located on the side of the rocker plate away from the pneumatic motor. The other end of the external traction rope passes through the oil tank flange and is fixedly connected to the internal traction rope, and is located above the internal traction rope.