Under-tank measuring and sampling device and automatic measuring and sampling storage tank

Abstract

The utility model discloses an under-tank measuring and sampling device and an automatic measuring and sampling storage tank, and relates to the technical field of storage tank sampling technology, the device comprises a sampling part and a measuring control pay-off part, the measurement control pay-off part comprises a distance measuring line, a pay-off distance measuring device and an oil-water interface detection device, the distance measuring line is connected with the pay-off distance measuring device, and the oil-water interface detection device is connected with the distance measuring line; the sampling part comprises a sampling pipe and a sampling pump, the sampling pipe is connected with the sampling pump, and the end of the sampling pipe is connected with the end of the distance measuring line through a traction balance weight. The paying-off distance measuring device is used for taking up and paying off the distance measuring line, the distance measuring line moves together through the measuring sampling pipe connected with the traction balance weight, the oil-water interface measuring task can be accurately completed at a time in cooperation with a Hall current sensor of the oil-water interface detecting device, a sampling pump is made to accurately sample through a sampling pipe, and the defects in the prior art are overcome; and the working efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of storage tank sampling, in particular to a tank -under measurement sampling device and automatic measurement sampling storage tank. BACKGROUND

[0002] At present, in order to master the crude oil condition of the storage tank, the artificial tank measurement oil-water interface is often used in each joint station and transfer station of the petroleum industry to determine the crude oil dehydration effect.

[0003] The current technology adopts the mode of "measuring oil-water interface first, then lowering sampling" to operate. After tank measurement, the oil measuring hole is opened first, and then the oil-water interface is measured by using the oil measuring rod and the multimeter, and finally the sampling barrel is lowered to sample. The sampling rope is tied to the sampling barrel by knotting every meter, and the barrel is lowered to the required position, the rope is pulled up to open the plug, and sampling is carried out. The sampling method has large scale error of the scale rope, and the sampling position of the pulled-up rope is not accurate; or because the plug is too loose, the sampling barrel is filled before reaching the required liquid level, causing secondary error. The sampling device is not reasonably designed, the sampling error is large, the inventory is not accurate, and it is time-consuming and labor-consuming.

[0004] Announcement number: CN216746928U discloses a kind of petroleum tank -under full-automatic sampler, by receiving radar, ultrasonic liquid level meter digital signal, and according to liquid level signal instantaneously calculates height and is positioned by motor arbitrary sampling point to complete tank -under sampling.

[0005] The radar and ultrasonic liquid level meter in the prior art are used to calculate the sampling position, and there are large measurement errors and inaccurate sampling problems. The present application can complete accurate measurement and sampling under the tank by motor positioning.

[0006] Announcement number: CN214621882U discloses a kind of tank -under sampling device of storage tank, mainly by the lower, middle and upper sampling ports of the tank body inside sampling machine are connected with the sampling pipe and the sampling operation box outside the tank, through the spring driven by cylinder piston to reach specified position, liquid flows to the sampling operation box inside through the sampling pipe.

[0007] The prior art has too limited application range, and is only suitable for product oil storage tank. The present application is suitable for each functional tank such as settling tank, oil removal tank and oil storage tank in oil product processing process.

[0008] The utility model discloses an oil tank oil sampling combination device, including the sampling bucket, still including the shaking machine, the tape, the lifting rope, the shaking machine is fixed on the support, and the support is fixed on the flange of the oil tank upper port through the fixed device of bottom portion, the support is provided with the ammeter, the sampling bucket includes the bucket body, the bucket cover, the bottom valve, the bucket cover is inserted in the upper port of the bucket body, and the bottom valve is installed in the lower port of the bucket body, the upper end of the bucket body is provided with the handle, the shaking machine is located the upper port of the oil tank, the tape upper end is connected the shaking machine, and the tape lower end is connected the handle of the bucket body, the lifting rope upper end is connected the shaking machine, and the lifting rope lower end is connected the bucket cover, and the weight is provided with on the lifting rope. Sampling oil is carried out simultaneously, and the crude oil metering is accurate.

[0009] The prior art sampling needs manual operation, and the operation efficiency is low, and the labor intensity is high. The patent automatically completes sampling, and the efficiency is high, and the labor intensity is low.

[0010] In summary, the technical solutions of the above disclosed technologies and the technical problems to be solved and the beneficial effects produced are all different from the utility model, and the above disclosed technology documents do not have technical enlightenment for more technical features and the technical problems to be solved and the beneficial effects of the utility model. Utility model content

[0011] In view of the above defects existing in the prior art, the utility model aims at providing a tank under measurement sampling device and automatic measurement sampling storage tank.

[0012] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0013] On the one hand, the utility model provides a tank under measurement sampling device, including sampling part, still including measurement control pay-off part, the measurement control pay-off part includes range line, pay-off range device, oil water interface detection device, the range line is connected with pay-off range device, and the oil water interface detection device is connected with range line, the sampling part includes sampling pipe, sampling pump, the sampling pipe is connected with sampling pump, and the sampling pipe end head is connected with range line end head through traction counterweight.

[0014] Further, the pay-off range device includes driving motor, rope displacement sensor,

[0015] Specifically, the range line is connected with rope displacement sensor,

[0016] Specifically, the driving motor output shaft is connected with winding wheel, and the range line is arranged at least one circle around the winding wheel.

[0017] Further, the oil water interface detection device includes hall current sensor, discharge contactor,

[0018] Specifically, the ranging wire is made of a conductor material, the discharge contactor is connected with the ranging wire through a spring sheet, and the Hall current sensor is sleeved on the ranging wire.

[0019] Specifically, the discharge contactor is located between the pull rope displacement sensor and the Hall current sensor, the winding wheel is made of an insulating material, and the traction counterweight is made of a conductor material.

[0020] Further, the outlet of the sampling pump is connected with an outlet pipe, and a sampling valve is arranged on the outlet pipe.

[0021] Further, the wire laying ranging device and the oil-water interface detection device are arranged in a measurement control cabinet.

[0022] Specifically, the ranging wire is fixedly connected with a limiting device outside the measurement control cabinet, and the measurement control cabinet and the limiting device are made of an insulating material.

[0023] In a second aspect, the utility model provides an automatic measurement sampling storage tank, including electric cabinet, storage tank, including one aspect the tank under measurement sampling device; electric cabinet is connected with wire laying ranging device, oil -water interface detection device electricity through first signal cable; electric cabinet is connected with sampling pump electricity through second signal cable; the upper end of storage tank is provided with measurement sampling mouth, and the traction counterweight is hung in the inside of measurement sampling mouth, the upper end of measurement sampling mouth is erected with wire supporter, and the ranging wire is in contact with the wire supporter.

[0024] Further, the wire supporter is a single-groove roller, the single-groove roller is provided with an annular wire groove, the ranging wire is arranged in the wire groove, the single-groove roller is rotatably arranged on the top of the measurement sampling mouth through a U-shaped support, and the single-groove roller is made of an insulating material.

[0025] Further, the electric cabinet is provided with a programmable controller, a liquid level display screen, a sampling pump starting knob, a ranging wire control knob and an indicator light.

[0026] Specifically, the programmable controller is electrically connected with the wire laying ranging device and the oil-water interface detection device, receives information and sends control signals.

[0027] Specifically, the liquid level display screen displays liquid level information.

[0028] Specifically, the sampling pump starting knob is electrically connected with the programmable controller to control the sampling pump to work, the ranging wire control knob is electrically connected with the programmable controller to control the wire laying ranging device to work, and the indicator light indicates the working state of the sampling pump and the wire laying ranging device.

[0029] Further, the electric cabinet further includes a main switch and an adjustment mode knob.

[0030] Specifically, the total switch is a power supply total switch of the electric control cabinet.

[0031] Specifically, the adjustment mode knob is used for adjusting the automatic operation and manual control mode of the programmable controller.

[0032] Further, the sampling pipe is a double-layer pipe, the outer layer of the sampling pipe is a fixed pipe, and the inner layer of the sampling pipe is a flexible pipe.

[0033] Specifically, the flexible pipe is in communication with a liquid inlet of the sampling pump, one end of the fixed pipe is fixed to the sampling pump, and the other end is fixedly arranged at the top of the measuring sampling port, one end of the flexible pipe away from the sampling pump extends out of the fixed pipe, and the flexible pipe is fixedly connected with the traction counterweight.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] 1. The wire measuring device of the utility model retracts and releases the measuring line, moves the measuring sampling pipe connected with the traction counterweight together, cooperates with the Hall current sensor of the oil-water interface detection device, can accurately complete the oil-water interface measurement task at one time, makes the sampling pump accurately sample through the sampling pipe, makes up for the defects of the prior art, and greatly improves the work efficiency.

[0036] 2. In the sampling process, the sampling pump extracts the sample in forward rotation, and pushes the sample in the sampling pipe back to the tank in reverse rotation, so that the representativeness of the taken sample is ensured.

[0037] 3. The utility model can complete the measuring and sampling operation by operating outside the storage tank, reduces the labor intensity of the post staff, and improves the daily production management of the station and the warehouse. DETAILED DESCRIPTION

[0038] Fig. 1 is a structural schematic view of the automatic measuring and sampling storage tank in the utility model;

[0039] Fig. 2 is an internal structure diagram of the measuring control cabinet in the utility model;

[0040] Fig. 3 is a panel structure schematic view of the PLC control cabinet in the utility model.

[0041] In the figure: electric control cabinet 1, measurement control cabinet 2, sampling pump 3, first signal cable 4.1, second signal cable 4.2, ranging line 5, sampling tube 6, fixed PVC tube 6.1, PVC steel wire reinforced hose 6.2, sampling valve 7, traction counterweight 8, winding wheel 9, pull rope displacement sensor 10, driving motor 11, general switch 12, mechanical current display meter 13, liquid level display screen 14, digital current display meter 15, sampling pump starting knob 16, adjustment mode knob 17, sampling pump forward rotation indicator lamp 18, sampling pump reverse rotation indicator lamp 19, ranging line control knob 20, lowering indicator lamp 21, recovery indicator lamp 22, alarm lamp 23, Hall current sensor 24, discharge contactor 25, limit stop 26, single-groove roller 27. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0043] Embodiment 1

[0044] Please refer to Figs. 1-2 The utility model provides a kind of tank measurement sampling device under, including measurement control pay-off section, sampling part, the measurement control pay-off section includes ranging line 5, pay-off distance measuring device, oil-water interface detection device, the ranging line 5 is connected with pay-off distance measuring device, the oil-water interface detection device is connected with ranging line 5, the sampling part includes sampling tube 6, sampling pump, the sampling tube 6 is connected with sampling pump, the sampling tube 6 end and ranging line 5 end head are connected by traction counterweight 8.

[0045] Among them, pay-off distance measuring device includes driving motor 11, pull rope displacement sensor 10, the ranging line 5 is connected with the wheel hub in pull rope displacement sensor 10, the output shaft of driving motor 11 is connected winding wheel 9, the ranging line 5 is wound at least one circle in winding wheel 9, traction counterweight 8 and pull rope displacement sensor 10 will exert two directions force to ranging line 5, so that ranging line 5 and winding wheel 9 are closely attached, not slip, by driving motor 11 drive ranging line 5 is pulled out or retracted from pull rope displacement sensor 10, so that traction counterweight 8 moves downward or upward.

[0046] The oil-water interface detection device comprises a Hall current sensor 24 and a discharge contactor 25, the ranging line 5 is a steel wire rope, the discharge contactor 25 is connected with the ranging line 5 through spring sheet contact, the Hall current sensor 24 is sleeved on the ranging line 5, the discharge contactor 25 is located between the rope displacement sensor 10 and the Hall current sensor 24, the winding wheel 9 is made of insulating material, and the traction counterweight 8 is made of metal material; the discharge contactor 25 applies voltage, when the traction counterweight 8 contacts with the oil-water interface, the Hall current sensor 24 measures current change, and the position of the oil-water interface is determined.

[0047] The sampling pump 3 is connected with an outlet pipe through an outlet, and a sampling valve 7 is arranged on the outlet pipe.

[0048] Preferably, the sampling pump 3 is an explosion-proof gear pump.

[0049] Preferably, the sampling pipe 6 is made of PVC.

[0050] Further, the wire laying and ranging device and the oil-water interface detection device are arranged in the measurement control cabinet 2, the ranging line 5 is fixedly connected with a limit stop 26 outside the measurement control cabinet 2, the measurement control cabinet 2 and the limit stop 26 are made of insulating material, such as plastic, and when the traction counterweight 8 is moved upward to zero position, the limit stop 26 contacts with the outer wall of the measurement control cabinet 2.

[0051] Specifically, the limit stop 26 is two slotted limit blocks which are clamped on the ranging line 5 through bolts.

[0052] Preferably, the driving motor 11 is an explosion-proof servo motor which can detect the torque change of the output shaft, when the limit stop 26 contacts with the outer wall of the measurement control cabinet 2, the torque increases, the traction counterweight 8 is moved upward to the position, and the driving motor 11 stops running.

[0053] Preferably, the limit stop 26 is provided with a travel switch which faces the measurement control cabinet 2, when the travel switch contacts with the outer wall of the measurement control cabinet 2, the traction counterweight 8 is moved upward to the position, and the driving motor 11 stops running.

[0054] It should be noted that the rope displacement sensor 10 itself is prior art, the rope displacement sensor 10 internally comprises a rotary inductor and a hub, the hub is connected with the inductor, when the rope is stretched and retracted, the hub is rotated, the rotary inductor can be an incremental encoder, an absolute value encoder, a potentiometer or the like, which is used for detecting the rotation of the hub and converting the rotation into an electric signal; the Hall current sensor 24 itself is also prior art, which has high sensitivity and can detect very small current; the person skilled in the art is clear about this.

[0055] Embodiment 2:

[0056] On the basis of embodiment 1,Fig. 3 The embodiment provides an automatic measurement sampling tank, which comprises an electric control cabinet 1, a tank under measurement sampling device described in the embodiment 1, and a tank, the electric control cabinet 1 is electrically connected with a pull rope displacement sensor 10, a driving motor 11, a Hall current sensor 24 and a discharge contactor 25 through a first signal cable 4.1, the electric control cabinet 1 is electrically connected with a sampling pump 3 through a second signal cable 4.2, the tank is provided with a measurement sampling port at an upper end, the traction counterweight 8 is hung in the measurement sampling port, a wire supporting device is arranged at the upper end of the measurement sampling port, and the ranging line 5 is in contact with the wire supporting device.

[0057] The electric control cabinet 1 is provided with a programmable controller, a main switch 12, a mechanical current display meter 13, a liquid level display screen 14, a digital current display meter 15, a sampling pump starting knob 16, an adjustment mode knob 17, a sampling pump forward rotation indicator lamp 18, a sampling pump reverse rotation indicator lamp 19, a ranging line control knob 20, a lowering indicator lamp 21, a recycling indicator lamp 22 and an alarm lamp 23.

[0058] The programmable controller is electrically connected with the pull rope displacement sensor 10, the driving motor 11, the Hall current sensor 24, the discharge contactor 25 and the sampling pump 3, receives information and sends control signals.

[0059] The main switch 12 is a power supply main switch for controlling the electric control cabinet 1 and the tank under measurement sampling device.

[0060] The mechanical current display meter 13 and the digital current display meter 15 are connected with the Hall current sensor 24 and used for displaying current.

[0061] The liquid level display screen 14 is used for displaying a liquid level value calculated by the programmable controller.

[0062] The sampling pump starting knob 16 is used for controlling a working state of the sampling pump 3, and the sampling pump forward rotation indicator lamp 18 and the sampling pump reverse rotation indicator lamp 19 are used for displaying the working state of the sampling pump 3.

[0063] The adjustment mode knob 17 is used for adjusting automatic and manual states.

[0064] The ranging line control knob 20 is used for controlling a working state of the driving motor 11, and the lowering indicator lamp 21 and the recycling indicator lamp 22 are used for displaying the working state of the driving motor 11.

[0065] The alarm lamp 23 is used for prompting when an exception or an error occurs in an operation process.

[0066] The wire supporting device is a single-groove roller 27, the single-groove roller 27 is provided with an annular wire groove, the ranging line 5 is arranged in the wire groove, and the single-groove roller 27 is rotationally arranged at the top of the measurement sampling port through a U-shaped support.

[0067] The sampling pipe 6 is a double-layer pipe, the outer layer of the sampling pipe 6 is a fixed PVC pipe 6.1, the inner layer of the sampling pipe 6 is a PVC steel wire reinforced hose 6.2, the PVC steel wire reinforced hose 6.2 is in communication with the liquid inlet of the sampling pump 3, one end of the fixed PVC pipe 6.1 is fixed with the sampling pump 3, and the other end is fixedly arranged at the top of the measuring sampling port, the PVC steel wire reinforced hose 6.2 extends out of the fixed PVC pipe 6.1, and the PVC steel wire reinforced hose 6.2 is fixedly connected with the traction counterweight 8; in operation, the PVC steel wire reinforced hose 6.2 is displaced upward and downward simultaneously with the ranging line 5.

[0068] When installed, the ranging line 5 is prevented from being stuck in movement by arranging a plurality of single-groove rollers 27, the single-groove rollers 27 are made of insulating materials, and the ranging line 5 is ensured to pass through only the oil-water communication circuit.

[0069] It should be noted that the programmable controller can be a PLC, a single-chip microcomputer, an industrial computer or the like, which belongs to the prior art and is clear to those skilled in the art.

[0070] Embodiment 3:

[0071] Based on the embodiment 2, the embodiment provides a use method of the automatic measuring and sampling storage tank, including the following steps:

[0072] S1, the ranging line 5 is retracted, the traction counterweight 8 is located at zero position, the distance between the traction counterweight 8 and the tank bottom is measured, the position limiter 26 is in contact with the outer wall of the measuring control cabinet 2, and then the position limiter 26 is fixedly connected with the ranging line 5;

[0073] S2, the total switch 12 on the electric control cabinet 1 is turned on, the mode knob 17 is adjusted to select the manual operation mode, the ranging line control knob 20 is rotated to send a lowering instruction to the driving motor 11 in the measuring control cabinet, the lowering indicator light 21 is turned on, the driving motor 11 drives the winding wheel 9 to release the ranging line 5, and the connected sampling pipe 6 is driven by the traction counterweight 8 to move downward in the liquid in the tank along with the ranging line 5;

[0074] According to the different conductive characteristics of the oil and water media, the discharge contactor 25 releases a 1.5V measurement current to cooperate with the Hall current sensor 24 to accurately find the oil-water interface, at this time, the displacement data collected by the pull rope displacement sensor 10 is transmitted to the programmable controller, the programmable controller calculates the oil level interface height through the original height of the traction counterweight 8, and displays the liquid level on the liquid level display screen 14.

[0075] S3, adjust the sampling pump start knob 16 to positive rotation, the sampling pump positive rotation indicator light 18 is bright, the sampling pump 3 works, the sample in the tank is extracted to the sampling pump 3 through the measuring sampling pipe, and flows out through the sampling valve 7, after sampling is completed, the sampling pump start knob 16 on the operation cabinet 1 is adjusted to reverse rotation, the sampling pump reverse rotation indicator light 19 is bright, and the residual liquid in the sampling pipe 6 is reversely extracted to the tank;

[0076] S4, the rotary range control knob 20 sends a retraction instruction to the driving motor 11 in the measuring control cabinet, the retraction indicator light 22 is bright, the explosion-proof driving motor drives the winding wheel 9 to collect the range 5, and the sampling pipe 6 is driven to move upwards in the liquid in the tank under the traction counterweight 8; when the limiter 26 contacts the outer wall of the measuring control cabinet 2, the traction counterweight 8 is moved to the position, and the driving motor 11 stops running.

[0077] S5, place the sampling container, open the sampling valve 7, select the automatic operation mode of the adjustment mode knob 17, and the automatic sampling device under a tank measures and samples the range 5 positioning oil-water interface, extracts sample liquid, and reversely extracts residual liquid.

[0078] In the application, the parts themselves that are not expanded in the application, and the connection modes of the parts in the application all belong to the known technology in the technical field. Direct application can be used, and details are not repeated.

[0079] In the utility model, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense. For example, "connection" can be fixed connection, or detachable connection, or integrally connected. "Connected" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0080] In the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or unit must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model.

[0081] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tank-under-tank measurement and sampling device, comprising a sampling section, characterized in that, It also includes the measurement and control layout section; The measurement and control line-laying section includes a distance measuring line, a line-laying and distance measuring device, and an oil-water interface detection device. The distance measuring line is connected to the line-laying and distance measuring device, and the oil-water interface detection device is connected to the distance measuring line. The sampling section includes a sampling tube and a sampling pump. The sampling tube is connected to the sampling pump, and the end of the sampling tube is connected to the end of the ranging line through a traction counterweight.

2. The under-tank measurement and sampling device according to claim 1, characterized in that, The wire-laying distance measuring device includes a drive motor and a rope displacement sensor; The ranging line is connected to the pull rope displacement sensor; The output shaft of the drive motor is connected to the winding wheel, and the ranging line is wound around the winding wheel at least once.

3. The under-tank measurement and sampling device according to claim 2, characterized in that, The oil-water interface detection device includes a Hall current sensor and a discharge contactor. The ranging line is made of a conductor material, the discharge contactor is connected to the ranging line through a spring contact, and the Hall current sensor is sleeved on the ranging line. The discharge contactor is located between the rope displacement sensor and the Hall current sensor, the winding wheel is made of insulating material, and the traction counterweight is made of conductive material.

4. The under-tank measurement and sampling device according to claim 3, characterized in that, The outlet of the sampling pump is connected to an outlet pipe, and a sampling valve is installed on the outlet pipe.

5. The under-tank measurement and sampling device according to claim 3, characterized in that, The wire-laying distance measuring device and the oil-water interface detection device are installed in the measurement control cabinet; The ranging line is fixedly connected to a limit switch outside the measurement control cabinet, and the measurement control cabinet and the limit switch are made of insulating material.

6. An automatic measurement and sampling storage tank, comprising an electrical control cabinet and a storage tank, characterized in that, It also includes the under-tank measurement and sampling device as described in claim 1; The electrical control cabinet is electrically connected to the wire ranging device and the oil-water interface detection device via a first signal cable; the electrical control cabinet is electrically connected to the sampling pump via a second signal cable. The upper end of the storage tank is provided with a measurement sampling port, the traction counterweight is suspended inside the measurement sampling port, a guide wire is erected at the upper end of the measurement sampling port, and the distance measuring line is in contact with the guide wire.

7. An automatic measurement and sampling storage tank according to claim 6, characterized in that, The guide roller is a single-groove roller with an annular groove. The ranging line is laid in the groove. The single-groove roller is rotatably mounted on top of the measurement sampling port via a U-shaped bracket. The single-groove roller is made of insulating material.

8. An automatic measurement and sampling storage tank according to claim 6, characterized in that, The electrical control cabinet is equipped with a programmable controller, a liquid level display screen, a sampling pump start knob, a distance measuring line control knob, and indicator lights. The programmable controller is electrically connected to the wire ranging device and the oil-water interface detection device. The programmable controller receives information and sends control signals. The liquid level display screen shows liquid level information; The sampling pump start knob is electrically connected to the programmable controller to control the operation of the sampling pump; the distance measuring line control knob is electrically connected to the programmable controller to control the operation of the line-laying distance measuring device; the indicator light indicates the operating status of the sampling pump and the line-laying distance measuring device.

9. An automatic measurement and sampling storage tank according to claim 8, characterized in that, The electrical control cabinet also includes a main switch and an adjustment mode knob; The main switch is the main power switch for the electrical control cabinet; The adjustment mode knob is used to adjust the automatic operation and manual control modes of the programmable controller.

10. An automatic measurement and sampling storage tank according to claim 6, characterized in that, The sampling tube is a double-layered tube, with the outer layer being a fixed tube and the inner layer being a flexible tube; The hose is connected to the inlet of the sampling pump. One end of the fixed tube is fixed to the sampling pump, and the other end is fixedly installed at the top of the measurement sampling port. The end of the hose away from the sampling pump extends out of the fixed tube, and the hose is fixedly connected to the traction counterweight.

Images