Oil sampling device with built-in power in tank

Abstract

The invention relates to the technical field of sampling equipment of petroleum and liquid chemical products, in particular to an in-tank built-in power oil sampling device which comprises an oil tank and a built-in power sampling device, the built-in power sampling device comprises an out-tank main machine, an in-tank mechanism and a traction and pipeline mechanism, and the out-tank main machine is detachably connected with the oil tank; the main engine is detachably connected with the oil tank and located on one side outside the oil tank, the in-tank mechanism is detachably connected with the oil tank and located on one side inside the oil tank, one end of the traction and pipeline mechanism is detachably connected with the main engine outside the tank and located above the main engine outside the tank, and the other end of the traction and pipeline mechanism is detachably connected with the in-tank mechanism and located above the in-tank mechanism. By additionally arranging the built-in power sampling device, the problem that deep sampling of petroleum and liquid chemical products is difficult is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling equipment for petroleum and liquid chemical products, in particular to an oil sampling device with built-in power in a tank. Background Art

[0002] Tank sampling for petroleum and liquid chemical products is a key step in the production, storage, transportation, and quality control processes. Currently, the sampling technology commonly used in the industry has the following technical pain points:

[0003] Manual sampling is the most basic sampling method, typically involving lowering a sampling rope or bottle from an opening at the top of the tank to the target depth. Traditional manual sampling relies on operator experience, making it difficult to precisely control sampling depth and speed, which can easily lead to sample stratification or contamination. It is only suitable for shallow-level liquid sampling and is difficult to obtain representative samples from deeper layers of liquid in large tanks. Furthermore, manual operation poses serious safety risks in environments with toxic, hazardous, or flammable and explosive media. Electric submersible pump sampling technology has improved the sampling depth issue to some extent, but its application is subject to numerous limitations. Furthermore, some oil tanks utilize three-point sampling structures. While these structures enable simple multi-point sampling, they present challenges such as difficulty adjusting the sampling position, difficult maintenance, and poor adaptability. Furthermore, these devices often require complex transmission mechanisms or control systems at the bottom of the tank, which not only increases manufacturing costs but also compromises the overall structure and safety of the tank. Existing patented technologies have attempted to improve sampling performance by improving pump structure or optimizing piping layout, but none of these solutions fundamentally resolve the conflict between power transmission efficiency and adaptability to the tank environment. For example, although the solution of using an external pneumatic diaphragm pump avoids electrical risks, due to the working principle of the pneumatic diaphragm pump itself, its suction range cannot exceed 8 meters. At the same time, its suction range is closely related to the local altitude. The higher the altitude, the lower the suction range.

[0004] The core innovation of this invention lies in its distributed power architecture: the pneumatic-hydraulic energy conversion unit is externalized for safety, a unique three-channel composite pipeline is used to achieve lossless transmission of high-pressure power, and a miniaturized hydraulic drive system is integrated within the tank to directly act on the sampling terminal. This design retains the inherent safety characteristics of the pneumatic system while achieving the efficiency and stability of the hydraulic drive, providing a new technical approach for deep sampling. Summary of the Invention

[0005] The purpose of the present 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-mentioned purpose, the present invention adopts an oil sampling device with built-in power in a tank, including an oil tank and a built-in power sampling device, the built-in power sampling device including an external main engine, an internal mechanism, a traction and piping mechanism, the external main engine is detachably connected to the oil tank and is located on the external side of the oil tank, the internal mechanism is detachably connected to the oil tank and is located on the internal side of the oil tank, one end of the traction and piping mechanism is detachably connected to the external main engine and is located above the external main engine, and the other end of the traction and piping mechanism is detachably connected to the internal mechanism and is located above the internal mechanism.

[0007] Among them, the off-tank main unit includes a controller, a tractor, a cover, a frame and a sampling bottle. The frame is detachably connected to the oil tank and is located on the external 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 below one side of the interior of the cover. The tractor is detachably connected to the cover and is located inside the cover, and the tractor is arranged on one side of the controller. The sampling bottle is detachably connected to the cover and is located inside the cover. The sampling screen is respectively arranged on one side of the controller and the tractor.

[0008] Wherein, the controller includes a pneumatic hydraulic pump station, a pneumatic hydraulic pump air intake line, an oil production line, a high-pressure oil delivery line and a high-pressure oil return line. The pneumatic hydraulic pump station is detachably connected to the cover and is located at the lower side of the inner side of the cover. The pneumatic hydraulic pump air intake line is detachably connected to the pneumatic hydraulic pump station and is located on one side of the pneumatic hydraulic pump station. One end of the oil production line is detachably connected to the pneumatic hydraulic pump station and is located on the side of the pneumatic hydraulic pump close to the pneumatic hydraulic pump air intake line. The other end of the oil production line is detachably connected to the sampling bottle and is located on the upper side of 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, and the high-pressure oil pipeline and the oil production pipeline are arranged vertically, one end of the high-pressure return oil pipeline is detachably connected to the pneumatic hydraulic pump station and is located on a side of the pneumatic hydraulic pump station close to the high-pressure oil pipeline, and the high-pressure return oil pipeline is arranged below the high-pressure oil pipeline, the other ends of the high-pressure oil pipeline and the high-pressure return oil pipeline are respectively detachably connected to the traction and pipeline mechanism, and are located at the end of the traction and pipeline mechanism away from the mechanism in the tank.

[0009] In which, the traction device includes an air motor and a rocker plate, the air motor is detachably connected to the cover and is located on one side of the interior of the cover, and the air motor is arranged on one side of the controller, one side of the rocker plate is rotatably connected to the air motor and is located at the output end of the air motor, and the other side of the rocker plate is detachably connected to the traction and pipeline mechanism and is located at the end of the traction and pipeline mechanism away from the mechanism inside the tank.

[0010] Among them, the internal mechanism includes an oil tank flange, an internal traction rope, a three-in-one spiral tube, a micro gear pump and an oil production rocking pump. The oil tank flange is detachably connected to the oil tank and is located inside the oil tank. The end of the traction and piping mechanism away from the main engine outside the tank is detachably connected to the oil tank flange and is located above the oil tank flange. The internal traction rope is detachably connected to the oil tank flange and is located at the lower center of the oil tank flange. The micro gear pump is detachably connected to the internal traction rope and is located below the internal traction rope. The three-in-one spiral tube is arranged on the outer surface of the internal traction rope. The oil production rocking pump is detachably connected to the micro gear pump and is located below the micro gear pump.

[0011] Among them, the three-in-one spiral pipe includes an in-tank oil production pipeline, an in-tank high-pressure oil transmission pipeline and an in-tank high-pressure oil return pipeline. The in-tank oil production pipeline is arranged on the outer surface of the in-tank traction rope, the in-tank high-pressure oil transmission pipeline is arranged on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil transmission pipeline is arranged on one side of the in-tank oil production pipeline, the in-tank high-pressure oil return pipeline is arranged on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil return pipeline is also arranged on one side of the in-tank oil production pipeline and one side of the in-tank high-pressure oil transmission pipeline respectively.

[0012] In which, the traction and pipeline mechanism includes a three-in-one straight pipeline and a traction rope outside the tank, one end of the three-in-one straight pipeline passes through the cover shell and is detachably connected to the high-pressure oil pipeline and the high-pressure return oil pipeline respectively, and is located at one end of the pneumatic hydraulic pump station described in the principle of the high-pressure oil pipeline and the high-pressure return oil pipeline, the other end of the three-in-one straight pipeline passes through the oil tank flange and is detachably connected to the high-pressure oil pipeline and the high-pressure return oil pipeline in the tank respectively, and is located at the end of the high-pressure oil pipeline and the high-pressure return oil pipeline in the tank away from the micro gear pump, one end of the traction rope outside the tank passes through the cover shell and is slidably connected to the rocker, and is located on the side of the rocker away from the pneumatic motor, the other end of the traction rope outside the tank passes through the oil tank flange and is fixedly connected to the traction rope inside the tank, and is located above the traction rope inside the tank.

[0013] The present invention provides an oil sampling device with built-in power in a tank, comprising an oil tank and a built-in power sampling device, wherein the built-in power sampling device comprises an external main engine, an internal mechanism, a traction and piping mechanism, wherein the external main engine is detachably connected to the oil tank and is located on the external side of the oil tank, the internal mechanism is detachably connected to the oil tank and is located on the internal side of the oil tank, one end of the traction and piping mechanism is detachably connected to the external main engine and is located above the external main engine, and the other end of the traction and piping mechanism is detachably connected to the internal mechanism and is located above the internal mechanism. Due to the addition of the built-in power sampling device, the problem of difficult deep sampling of petroleum and liquid chemical products will be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a three-dimensional view of an oil sampling device with built-in power in a tank according to the present invention.

[0016] Figure 2 This is a three-dimensional view of the main unit outside the tank in an oil sampling device with built-in power in the tank of the present invention.

[0017] Figure 3 This is an enlarged three-dimensional view of the main engine component outside the tank of an oil sampling device with built-in power in the tank of the present invention.

[0018] Figure 4 The present invention provides a three-dimensional view of the in-tank mechanism of an oil sampling device with built-in power in the tank.

[0019] Figure 5 This is a schematic diagram of the cross section of a three-in-one spiral tube in an oil sampling device with built-in power in a tank according to the present invention.

[0020] Oil tank 1, main unit outside the tank 2, mechanism inside the tank 3, traction and piping mechanism 4, controller 2.1, tractor 2.2, cover 2.3, frame 2.4, sampling bottle 2.5, pneumatic-hydraulic pump station 2.1.1, pneumatic-hydraulic pump air inlet line 2.1.2, oil production line 2.1.3, high-pressure oil delivery line 2.1.4, high-pressure oil return line 2.1.5, pneumatic motor 2.2.1, rocker 2.2.2, traction rope inside the tank 3.1, three-in-one spiral hose 3.2, oil production line inside the tank 3.2.1, high-pressure oil delivery line inside the tank 3.2.2, high-pressure oil return line inside the tank 3.2.3, micro gear pump 3.3, oil production rocker pump 3.4, tank flange 3.5, three-in-one straight line 4.1, traction rope outside the tank 4.2. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0022] See also Figures 1 to 5 , Figure 1 This is a three-dimensional view of an oil sampling device with built-in power in a tank according to the present invention. Figure 2 This is a three-dimensional view of the main unit outside the tank in an oil sampling device with built-in power in the tank of the present invention. Figure 3 This is an enlarged three-dimensional view of the main components outside the tank of an oil sampling device with built-in power in the tank of the present invention. Figure 4 This is a three-dimensional view of the in-tank mechanism of an oil sampling device with built-in power in the tank according to the present invention. Figure 5 This is a schematic diagram of the cross section of a three-in-one spiral tube in an oil sampling device with built-in power in a tank according to the present invention.

[0023] The application provides a kind of built-in power oil sampling device in tank, including oil tank 1 and built-in power sampling device, the built-in power sampling device includes tank outside main machine 2, tank mechanism 3, traction and pipeline mechanism 4, tank outside main machine 2 includes controller 2.1, tractor 2.2, cover 2.3, rack 2.4 and sampling bottle 2.5, controller 2.1 includes pneumatic hydraulic pump station 2.1.1, pneumatic hydraulic pump air inlet pipeline 2.1.2, oil production pipeline 2.1.3, high-pressure oil pipeline 2.1.4 and high-pressure oil return pipeline 2.1.5, tractor 2.2 includes pneumatic motor 2.2.1 and swing disc 2.2.2, tank mechanism 3 includes oil tank flange 3.5, tank traction rope 3.1, three-in-one spiral pipe 3.2, micro gear pump 3.3 and oil production swing pump 3.4, three-in-one spiral pipe 3.2 includes tank oil production pipeline 3.2.1, tank high-pressure oil pipeline 3.2.2 and tank high-pressure oil return pipeline 3.2.3, traction and pipeline mechanism 4 includes three-in-one pipeline 4.1 and tank outside traction rope 4.2, the foregoing scheme solves the problem of deep sampling of petroleum and liquid chemical products, it can be understood that the foregoing scheme can be used in sampling operation stage, first through the swing disc 2.2.2 of the tractor 2.2, power is provided by the pneumatic motor 2.2.1, the tank outside traction rope 4.2 is accurately controlled, so as to drive the tank mechanism 3 to be lowered to the predetermined sampling depth position in the oil tank 1 through the flange opening 3.5 on the top of the oil tank 1, ensure that the sampling port of the oil production swing pump 3.4 in the tank mechanism 3 is positioned accurately, after positioning, start the pneumatic hydraulic pump station 2.1.1 of the tank outside main machine 2, compressed air enters the pneumatic hydraulic pump station 2.1.1 through the pneumatic hydraulic pump air inlet pipeline 2.1.2, drive high-pressure oil to be generated, high-pressure oil is transmitted to the micro gear pump 3.3 in the tank through the high-pressure oil pipeline 1.4, three-in-one pipeline 4.1, tank high-pressure oil pipeline 3.2.2, the micro gear pump 3.3 converts hydraulic energy into mechanical energy, drive the oil production swing pump 3.4 to work, the oil production swing pump 3.4 works to generate negative pressure, and the oil in the oil tank 1 is sucked, the collected oil sample is transported to the sampling bottle 2.5 through the tank oil production pipeline 3.2.1, three-in-one pipeline 4.1 and oil production pipeline 2.1.3, after the micro gear pump 3.3 works, the oil is returned through the tank high-pressure oil return pipeline 3.2.3, three-in-one pipeline 4.1 and high-pressure oil return pipeline 2.1.5, and is transmitted back to the pneumatic hydraulic pump station 2.1.1, to form a circulating pipeline system, ensure the continuous and stable supply of power in the whole sampling process, after completing a sampling, if it is necessary to sample at different positions or depths, the position of the tank mechanism 3 is adjusted again through the tractor 2.2, and the above operation can be repeated; if the sampling work is completed, the pneumatic hydraulic pump station 2.1.1 is closed, and the tank mechanism 3 is retracted through the tractor 2.2, to complete the use of equipment.

[0024] For this specific embodiment, the tank outside main machine 2 is detachably connected with the oil tank 1 and located at one side outside the oil tank 1, the tank inside mechanism 3 is detachably connected with the oil tank 1 and located at one side inside the oil tank 1, one end of the traction and pipeline mechanism 4 is detachably connected with the tank outside main machine 2 and located above the tank outside main machine 2, the other end of the traction and pipeline mechanism 4 is detachably connected with the tank inside mechanism 3 and located above the tank inside mechanism 3.

[0025] Wherein, the rack 2.4 is detachably connected with the oil tank 1 and located at one side outside the oil tank 1, the cover 2.3 is detachably connected with the rack 2.4 and located above the rack 2.4, the controller 2.1 is detachably connected with the cover 2.3 and located at one side below the inside of the cover 2.3, the tractor 2.2 is detachably connected with the cover 2.3 and located inside the cover 2.3, and the tractor 2.2 is arranged at one side of the controller 2.1, the sampling bottle 2.5 is detachably connected with the cover 2.3 and located inside the cover 2.3, and the sampling bottle 2.5 is arranged at one side of the controller 2.1 and the tractor 2.2 respectively.

[0026] Secondly, the pneumatic hydraulic pump station 2.1.1 is detachably connected with the cover 2.3 and located at one side below the inside of the cover 2.3, the pneumatic hydraulic pump air inlet pipeline 2.1.2 is detachably connected with the pneumatic hydraulic pump station 2.1.1 and located at one side of the pneumatic hydraulic pump station 2.1.1, one end of the oil production pipeline 2.1.3 is detachably connected with the pneumatic hydraulic pump station 2.1.1 and located at one side of the pneumatic hydraulic pump station 2.1.1 close to the pneumatic hydraulic pump air inlet pipeline 2.1.2, the other end of the oil production pipeline 2.1.3 is detachably connected with the sampling bottle 2.5 and located above the sampling bottle 2.5, one end of the high-pressure oil pipeline 2.1.4 is detachably connected with the pneumatic hydraulic pump station 2.1.1 and located at one side of the pneumatic hydraulic pump station 2.1.1, and the high-pressure oil pipeline 2.1.4 is arranged vertically with the oil production pipeline 2.1.3, one end of the high-pressure oil return pipeline 2.1.5 is detachably connected with the pneumatic hydraulic pump station 2.1.1 and located at one side of the pneumatic hydraulic pump station 2.1.1 close to the high-pressure oil pipeline 2.1.4, and the high-pressure oil return pipeline 2.1.5 is arranged below the high-pressure oil pipeline 2.1.4, and the other ends of the high-pressure oil pipeline 2.1.4 and the high-pressure oil return pipeline 2.1.5 are detachably connected with the traction and pipeline mechanism 4 and located at one end of the traction and pipeline mechanism 4 away from the tank inside mechanism 3.

[0027] Meanwhile, the pneumatic motor 2.2.1 is detachably connected with the cover 2.3 and located at the inner side of the cover 2.3, and the pneumatic motor 2.2.1 is arranged at one side of the controller 2.1, one side of the rocker 2.2.2 is rotatably connected with the pneumatic motor 2.2.1 and located at the output end of the pneumatic motor 2.2.1, and the other side of the rocker 2.2.2 is detachably connected with the traction and pipeline mechanism 4 and located at the end of the traction and pipeline mechanism 4 far away from the tank-in mechanism 3.

[0028] In addition, the oil tank flange 3.5 is detachably connected with the oil tank 1 and located at the inner side of the oil tank 1, the end of the traction and pipeline mechanism 4 far away from the tank-out main machine 2 is detachably connected with the oil tank flange 3.5 and located above the oil tank flange 3.5, the tank-in traction rope 3.1 is detachably connected with 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 detachably connected with the tank-in traction rope 3.1 and located below the tank-in traction rope 3.1, the three-in-one spiral pipe 3.2 is arranged on the outer surface of the tank-in traction rope 3.1, and the oil pumping rocker pump 3.4 is detachably connected with the micro gear pump 3.3 and located below the micro gear pump 3.3.

[0029] Among them, the tank-in oil pipeline 3.2.1 is arranged on the outer surface of the tank-in traction rope 3.1, the tank-in high-pressure oil pipeline 3.2.2 is arranged on the outer surface of the tank-in traction rope 3.1, and the tank-in high-pressure oil pipeline 3.2.2 is arranged at one side of the tank-in oil pipeline 3.2.1, the tank-in high-pressure oil return pipeline 3.2.3 is arranged on the outer surface of the tank-in traction rope 3.1, and the tank-in high-pressure oil return pipeline 3.2.3 is also arranged at one side of the tank-in oil pipeline 3.2.1 and one side of the tank-in high-pressure oil pipeline 3.2.2 respectively.

[0030] One end of the three-in-one straight line 4.1 passes through the housing 2.3 and is detachably connected to the high-pressure oil delivery line 2.1.4 and the high-pressure oil return line 2.1.5, and is located at the end of the high-pressure oil delivery line 2.1.4 and the high-pressure oil return line 2.1.5 away from the pneumatic hydraulic pump station 2.1.1. The other end of the three-in-one straight line 4.1 passes through the oil tank flange 3.5 and is detachably connected to the high-pressure oil delivery line 3.2.2 and the high-pressure oil return line 3.2.3 in the tank. , and is located at one end of the high-pressure oil delivery pipeline 3.2.2 in the tank and the high-pressure oil return pipeline 3.2.3 in the tank away from the micro gear pump 3.3, one end of the traction rope 4.2 outside the tank passes through the cover 2.3 and is slidably connected to the rocking plate 2.2.2, and is located on the side of the rocking plate 2.2.2 away from the pneumatic motor 2.2.1, the other end of the traction rope 4.2 outside the tank passes through the oil tank flange 3.5 and is fixedly connected to the traction rope 3.1 inside the tank, and is located above the traction rope 3.1 inside the tank.

[0031] When using the present invention, entering the sampling operation stage, first through the rocking plate 2.2.2 of the tractor 2.2, using the pneumatic motor 2.2.1 to provide power, accurately control the retraction and extension of the tank outer traction rope 4.2, thereby driving the tank mechanism 3 to be lowered through the flange opening 3.5 on the top of the oil tank 1 to the predetermined sampling depth position in the oil tank 1, ensuring that the sampling port of the oil production rocking pump 3.4 in the tank mechanism 3 is accurately positioned. After the positioning is completed, the pneumatic hydraulic pump station 2.1.1 of the tank outer host 2 is started, and compressed air enters the pneumatic hydraulic pump station 2.1.1 through the pneumatic hydraulic pump air inlet line 2.1.2, driving the hydraulic oil to generate high pressure, and the high-pressure oil is transmitted to the micro gear pump 3.3 in the tank through the high-pressure oil delivery pipeline 2.1.4, the three-in-one straight pipeline 4.1, and the tank internal high-pressure oil delivery pipeline 3.2.2. The micro gear pump 3.3 converts hydraulic energy into mechanical energy. Mechanical energy drives the oil production rocking pump 3.4 to work. The oil production rocking pump 3.4 generates negative pressure when working, sucking the oil in the oil tank 1. The collected oil sample is transported to the sampling bottle 2.5 through the oil production pipeline 3.2.1 in the tank, the three-in-one straight pipeline 4.1, and the oil production pipeline 2.1.3. The return oil after the micro gear pump 3.3 works is transported back to the pneumatic hydraulic pump station 2.1.1 through the high-pressure return oil pipeline 3.2.3 in the tank, 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 supply of power for the entire sampling process. After completing one sampling, if sampling is required at a different position or depth, the position of the tank mechanism 3 can be adjusted again by the tractor 2.2, and the above operation can be repeated; if the sampling work is completed, the pneumatic hydraulic pump station 2.1.1 is closed, and the tank mechanism 3 is retracted by the tractor 2.2 to complete the use of the equipment.

[0032] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An oil sampling device with built-in power in a tank, comprising an oil tank, characterized in that: It also includes a built-in power sampling device, which includes an external main engine, an internal mechanism, and a traction and pipeline mechanism. The external main engine is detachably connected to the oil tank and is located on the external side of the oil tank. The internal mechanism is detachably connected to the oil tank and is located on the internal side of the oil tank. One end of the traction and pipeline mechanism is detachably connected to the external main engine and is located above the external main engine. 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 a tank as claimed in claim 1, characterized in that: The off-tank main unit includes a controller, a tractor, a cover, a frame and a sampling bottle. The frame is detachably connected to the oil tank and is located on the external 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 below one side of the interior of the cover. The tractor is detachably connected to the cover and is located inside the cover, and the tractor is arranged on one side of the controller. The sampling bottle is detachably connected to the cover and is located inside the cover. The sampling screen is respectively arranged on one side of the controller and the tractor.

3. The oil sampling device with built-in power in a tank as claimed in claim 2, characterized in that: The controller includes a pneumatic hydraulic pump station, a pneumatic hydraulic pump air intake line, an oil production line, a high-pressure oil delivery line and a high-pressure oil return line. The pneumatic hydraulic pump station is detachably connected to the cover and is located at the lower side of the interior of the cover. The pneumatic hydraulic pump air intake line is detachably connected to the pneumatic hydraulic pump station and is located on one side of the pneumatic hydraulic pump station. One end of the oil production line is detachably connected to the pneumatic hydraulic pump station and is located on a side of the pneumatic hydraulic pump close to the pneumatic hydraulic pump air intake line. The other end of the oil production line is detachably connected to the sampling bottle and is 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, and the high-pressure oil pipeline and the oil production pipeline are arranged vertically, one end of the high-pressure return oil pipeline is detachably connected to the pneumatic hydraulic pump station and is located on a side of the pneumatic hydraulic pump station close to the high-pressure oil pipeline, and the high-pressure return oil pipeline is arranged below the high-pressure oil pipeline, the other ends of the high-pressure oil pipeline and the high-pressure return oil pipeline are respectively detachably connected to the traction and pipeline mechanism, and are located at the end of the traction and pipeline mechanism away from the mechanism in the tank.

4. The oil sampling device with built-in power in a tank as claimed in claim 3, characterized in that: The tractor includes an air motor and a rocker plate. The air motor is detachably connected to the cover and is located on one side of the interior of the cover. The air motor is arranged on one side of the controller. One side of the rocker plate is rotatably connected to the air motor and is located at the output end of the air motor. The other side of the rocker plate is detachably connected to the traction and pipeline mechanism and is located at the end of the traction and pipeline mechanism away from the mechanism inside the tank.

5. The oil sampling device with built-in power in a tank as claimed in claim 4, characterized in that: The mechanism inside the tank includes an oil tank flange, an internal traction rope, a three-in-one spiral tube, a micro gear pump and an oil production rocking pump. The oil tank flange is detachably connected to the oil tank and is located inside the oil tank. The end of the traction and piping mechanism away from the main engine outside the tank is detachably connected to the oil tank flange and is located above the oil tank flange. The internal traction rope is detachably connected to the oil tank flange and is located at the lower center of the oil tank flange. The micro gear pump is detachably connected to the internal traction rope and is located below the internal traction rope. The three-in-one spiral tube is arranged on the outer surface of the internal traction rope. The oil production rocking pump is detachably connected to the micro gear pump and is located below the micro gear pump.

6. The oil sampling device with built-in power in a tank as claimed in claim 5, characterized in that: The three-in-one spiral pipe includes an in-tank oil production pipeline, an in-tank high-pressure oil transmission pipeline and an in-tank high-pressure oil return pipeline. The in-tank oil production pipeline is arranged on the outer surface of the in-tank traction rope, the in-tank high-pressure oil transmission pipeline is arranged on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil transmission pipeline is arranged on one side of the in-tank oil production pipeline. The in-tank high-pressure oil return pipeline is arranged on the outer surface of the in-tank traction rope, and the in-tank high-pressure oil return pipeline is also arranged on one side of the in-tank oil production pipeline and one side of the in-tank high-pressure oil transmission pipeline, respectively.

7. The oil sampling device with built-in power in a tank as claimed in claim 6, characterized in that: The traction and pipeline mechanism includes a three-in-one straight pipeline and a traction rope outside the tank. One end of the three-in-one straight pipeline passes through the cover shell and is detachably connected to the high-pressure oil pipeline and the high-pressure return oil pipeline respectively, and is located at one end of the pneumatic hydraulic pump station described in the principle of the high-pressure oil pipeline and the high-pressure return oil pipeline. The other end of the three-in-one straight pipeline passes through the oil tank flange and is detachably connected to the high-pressure oil pipeline and the high-pressure return oil pipeline in the tank respectively, and is located at the end of the high-pressure oil pipeline and the high-pressure return oil pipeline in the tank away from the micro gear pump. One end of the traction rope outside the tank passes through the cover shell and is slidably connected to the rocking plate, and is located on the side of the rocking plate away from the pneumatic motor. The other end of the traction rope outside the tank passes through the oil tank flange and is fixedly connected to the traction rope inside the tank, and is located above the traction rope inside the tank.

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