A petrochemical storage tank liquid level detection device

Abstract

The invention provides a petrochemical storage tank liquid level detection device, which relates to the technical field of storage tank liquid level measurement. The detection device comprises a detection handpiece, on which a winding piece is installed; the winding piece is used to detect the liquid level; a positioning piece is installed on the winding piece; the end of the positioning piece is plugged into the detection handpiece; a liquid surface detection piece is fixedly installed on the end of the winding piece, which can realize accurate determination of the liquid level position, and is convenient for staff to accurately perform liquid level height detection work, without the need for traditional judgment by observing the oil contamination height, with low operation difficulty and improved detection accuracy, solving the problem that the current petrochemical storage tank liquid level detection device relies more on manual feeling of the lead pendant touching the liquid surface, and the detection is prone to deviation.

Description

Technical Field

[0001] The invention relates to the technical field of storage tank liquid level measurement, and in particular to a petrochemical storage tank liquid level detection device. Background Art

[0002] Crude oil storage tanks are large containers for storing oil products and are used in refineries, oil fields, oil depots and other scenarios. In the actual crude oil storage tank level detection work, although there are level detection equipment such as radar level gauges, manual re-inspection of the liquid level is still required to ensure data accuracy. Usually, it is necessary to manually open the detection port of the oil tank at the top of the oil tank and measure through the empty gauge. When opening the oil tank detection port, it is necessary to pay attention to factors such as wind direction to prevent volatile gases from being blown to dangerous areas. The current petrochemical storage tank level detection device is not convenient for increasing downward pressure to straighten the detection ruler when dealing with heavy oil detection. Improper operation will easily affect the detection accuracy. The use of heavy counterweights will affect the flexibility of use. At the same time, it is more dependent on manual feeling of the lead pendant touching the liquid surface, and the detection is prone to deviation. At the same time, the oil on the surface of the lead pendant pulled out flows downward under the action of gravity, which is not convenient for accurately judging the liquid level height. At the same time, when performing level detection, it depends on observing the wind direction in advance, which is not convenient for collecting volatile gases, and there are safety hazards. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, an embodiment of the present invention relates to a petrochemical storage tank liquid level detection device, whose floating part can accurately calibrate the liquid level position, making it convenient for staff to accurately perform liquid level height detection work, without the traditional method of observing the oil contamination height for judgment, with low operating difficulty and improved detection accuracy.

[0004] According to a first aspect of the present invention, there is provided a liquid level detection device for a petrochemical storage tank, which specifically includes a detection handpiece, on which a winding piece is installed; the winding piece is used to detect the liquid level; a positioning piece is installed on the winding piece; the end of the positioning piece is plugged into the detection handpiece; a liquid level detection piece is fixedly installed on the end of the winding piece; a floating piece is installed on the liquid level detection piece; the floating piece is used to float on the liquid surface of the storage tank; a booster is installed at the bottom of the liquid level detection piece, and the booster is used to pull down the winding piece; a stabilizing piece is installed at the bottom of the booster; the stabilizing piece is used to increase the rotational stability of the booster; a volatile collecting part is installed on the detection handpiece; the volatile collecting part is used to collect volatile gases in the storage tank; the detection handpiece includes: a wheel frame plate and a spacer block, two of the wheel frame plates are provided, and a spacer block is connected between the two wheel frame plates by bolts.

[0005] Furthermore, the positioning member includes: a rocker arm, a limit pin and a limit tension spring, the rocker arm is fixedly installed at the end of the winding wheel; the limit pin is slidably inserted on the rocker arm; the end of the limit pin is inserted on the wheel frame plate on the same side; the limit tension spring is sleeved on the limit pin; the limit tension spring is connected between the limit pin and the rocker arm; the limit pin is used to insert into the wheel frame plate to position the winding wheel.

[0006] Furthermore, the winding component includes: a winding wheel and a winding belt, wherein both ends of the winding wheel are rotatably installed between two wheel frame plates; a winding belt is fixedly installed on the winding wheel; scale lines are provided on the winding belt; the winding wheel is used to wind up the winding belt; the winding belt passes through a socket provided in the middle of the detection insertion block; and both ends of the winding wheel pass through the two wheel frame plates respectively.

[0007] Furthermore, the detection hand piece also includes: a handle and a detection interpenetrating block, the handle is fixedly mounted on the spacer block; the detection interpenetrating block is connected between the two wheel frame plates by bolts; and a socket is provided in the middle of the detection interpenetrating block.

[0008] Furthermore, the floating part includes: a floating cylinder, an extrusion limit protrusion and a buoyancy ring, the floating cylinder is slidably sleeved on the detection mounting column; the extrusion limit protrusion is fixedly installed on the inner side of the floating cylinder; the extrusion limit protrusion is an arc-shaped structure; the extrusion limit protrusion is located in the limit groove; the extrusion limit protrusion is used to press the extrusion head; the downward pressure spring is connected between the floating cylinder and the detection mounting column.

[0009] Furthermore, the volatile collection part also includes: an exhaust pipe and a soft air bag, the exhaust pipe is fixedly installed on the protective plate; a soft air bag is fixedly installed on the exhaust pipe; a valve is provided on the exhaust pipe; and the soft air bag is used to collect volatile gases in the storage tank.

[0010] Furthermore, the liquid level detection component includes: a detection mounting column, a limit groove, a movable plate, a compression spring, a micro switch, an extrusion head and a downward pressure spring, the detection mounting column is fixedly mounted on the end of the winding belt; a limit groove is provided on the detection mounting column; a movable plate is slidably mounted on the detection mounting column; a compression spring is fixedly mounted on the side of the movable plate, and the other end of the compression spring is fixedly mounted inside the detection mounting column; a micro switch is fixedly mounted on the movable plate; the extrusion head is slidably mounted on the detection mounting column; the tail of the extrusion head is attached to the micro switch; the end of the extrusion head is a hemispherical structure; the extrusion head passes through the limit groove; the downward pressure spring is sleeved on the detection mounting column; the micro switch is used to detect the liquid level.

[0011] Furthermore, the stabilizing member includes: a stabilizing shell and stabilizing fins, the stabilizing shell is fixedly installed at the bottom of the boost cylinder; a circle of through holes is provided on the outside of the stabilizing shell, and the circle of through holes on the outside of the stabilizing shell is located above the boost impeller; six stabilizing fins are equidistantly installed on the outside of the stabilizing shell; the six stabilizing fins are used to be inserted below the oil level.

[0012] Furthermore, the booster component includes: a booster cylinder, a drive motor and a booster impeller, the booster cylinder is fixedly mounted at the bottom of the detection mounting column; the drive motor is installed inside the booster cylinder; the booster impeller is fixedly mounted on the output shaft of the drive motor; the booster impeller is used to rotate below the oil level.

[0013] Furthermore, the volatile collection part includes: a protective plate, an alarm light and a sealing sheet, the protective plate is fixedly installed with an alarm light; the protective plate is fixedly installed on two wheel frame plates by bolts; a sealing sheet is fixedly installed in the middle of the protective plate; the inner side of the sealing sheet is fitted through the winding belt; the protective plate is used to cover and buckle the oil tank inspection port; the micro switch is electrically connected to the alarm light.

[0014] Compared with the prior art, the petrochemical storage tank liquid level detection device provided by the present invention has the following beneficial effects:

[0015] The present invention adopts a floating part in conjunction with a liquid level detection part to accurately prompt the liquid level position. The buoyancy generated by the floating part when it is in contact with the liquid surface can slide on the detection mounting column, thereby ensuring accurate structural detection. Unlike traditional air gauges, there is no need to observe the oil contamination height of the lead sinker with the human eye during detection. This structure utilizes a slidable buoyancy ring to ensure accurate detection, and can prompt the staff that the position is up to standard. The staff can directly read the readings through the take-up tape.

[0016] In addition, by using a stabilizing part on the outside of the booster part, it is possible to penetrate below the oil surface. By utilizing the high viscosity of oil, active downward pressure assistance can be performed. The downward pressure generated by the rotation of the booster impeller can assist in straightening the take-up belt to prevent the take-up belt from continuing to be lowered when the buoyancy ring touches the liquid surface, causing the take-up belt to bend without being discovered. The structure is compact, and the portability of the staff can be improved compared to methods such as counterweights.

[0017] In addition, by adopting the volatile collection part, a protective plate can be used to reduce the volatility on the one hand, and at the same time, the protective plate can be used to limit the position. The diameter of the detection port of a traditional oil storage tank is usually larger than the size of the detection handpiece, and there is a risk that the detection handpiece will slip and fall into the storage tank. This structure can play a role in limiting and preventing it from falling. At the same time, the volatile gas can be collected by using a soft air bag to avoid the safety hazard of directly discharging excessive volatile gases into the air and floating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 A schematic diagram showing the overall structure of the present application;

[0022] Figure 2 A schematic diagram showing the bottom structure of the present application;

[0023] Figure 3 A cross-sectional view showing the internal structure of the present application;

[0024] Figure 4 A schematic diagram of a detection handpiece of the present application is shown;

[0025] Figure 5 This application shows Figure 4 A magnified view of the structure of the middle B area;

[0026] Figure 6 This application shows Figure 3 A magnified view of the structure of the middle C region;

[0027] Figure 7 A schematic diagram showing the structure of the stabilizer of the present application is shown;

[0028] Figure 8 A schematic diagram showing the floating member structure of the present application is shown;

[0029] Fig. 9 A schematic diagram showing the structure of the supercharging member of the present application is shown;

[0030] Fig.10 A schematic diagram of the volatile collection portion of the present application is shown;

[0031] Fig.11 This application shows Figure 1 A magnified view of the structure in region D.

[0032] Description of reference numerals:

[0033] 1. Detection hand piece; 101. Wheel frame plate; 1011. Spacer block; 1012. Handle; 102. Detection interlacing block; 2. Winding piece; 201. Winding wheel; 202. Winding belt; 3. Positioning piece; 301. Rocker arm; 302. Limit pin; 303. Limit tension spring; 4. Liquid level detection piece; 401. Detection mounting column; 4011. Limit slot; 402. Moving plate; 403. Compression spring; 404. Micro switch; 405 , extrusion head; 406, downward pressure spring; 5, floating part; 501, floating cylinder; 502, extrusion limit protrusion; 503, buoyancy ring; 6, booster part; 601, booster cylinder; 602, drive motor; 603, booster impeller; 7, stabilizing part; 701, stabilizing shell; 702, stabilizing fin; 8, volatile collection part; 801, protective plate; 802, warning light; 803, sealing piece; 804, exhaust pipe; 805, soft air bag. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1 to 11 :

[0036] The present invention proposes a petrochemical tank liquid level detection device, comprising a detection handheld piece 1, on which a winding piece 2 is installed; the winding piece 2 is used to detect the liquid level; a positioning piece 3 is installed on the winding piece 2; the end of the positioning piece 3 is plugged into the detection handheld piece 1; a liquid level detection piece 4 is fixedly installed on the end of the winding piece 2; a floating piece 5 is installed on the liquid level detection piece 4; the floating piece 5 is used to float on the liquid surface of the storage tank; a booster piece 6 is installed at the bottom of the liquid level detection piece 4, and the booster piece 6 is used to pull down the winding piece 2; a stabilizing piece 7 is installed at the bottom of the booster piece 6; the stabilizing piece 7 is used to increase the rotational stability of the booster piece 6; a volatile collecting part 8 is installed on the detection handheld piece 1; the volatile collecting part 8 is used to collect volatile gases in the storage tank; the detection handheld piece 1 comprises: a wheel frame plate 101 and a spacer block 1011, two wheel frame plates 101 are provided, and the spacer block 1011 is connected between the two wheel frame plates 101 by bolts.

[0037] In the embodiment of the present invention, the detection hand piece 1 also includes: a handle 1012 and a detection interspersed block 102, the handle 1012 is fixedly mounted on the spacer block 1011; the detection interspersed block 102 is connected between the two wheel frame plates 101 by bolts; a socket is provided in the middle of the detection interspersed block 102; the winding piece 2 includes: a winding wheel 201 and a winding belt 202, both ends of the winding wheel 201 are rotatably mounted between the two wheel frame plates 101; the winding belt 202 is fixedly mounted on the winding wheel 201, and the total length of the winding belt 202 is adjusted according to production needs; scale lines are provided on the winding belt 202; the winding wheel 201 is used to wind up the winding belt 202; the winding belt 202 passes through the socket provided in the middle of the detection interspersed block 102; the two ends of the winding wheel 201 are respectively passed through Two wheel frame plates 101; the positioning member 3 includes: a rocker arm 301, a limit pin 302 and a limit tension spring 303, the rocker arm 301 is fixedly installed at the end of the winding wheel 201; the limit pin 302 is slidably inserted on the rocker arm 301; the end of the limit pin 302 is inserted on the wheel frame plate 101 on the same side; the limit tension spring 303 is sleeved on the limit pin 302; the limit tension spring 303 is connected between the limit pin 302 and the rocker arm 301; the limit pin 302 is used to insert into the wheel frame plate 101 to position the winding wheel 201, and the positioning member 3 is used to perform positioning and adjustment work, and the positioning member 3 can be used to prevent the winding wheel 201 from losing its limit due to slipping out of the hand, and the floating member 5 can be prevented from directly falling. This structure can be more suitable for liquid level detection work for oil storage tanks.

[0038] In the embodiment of the present invention, the liquid level detection member 4 includes: a detection installation column 401, a limit groove 4011, a movable plate 402, a compression spring 403, a micro switch 404, an extrusion head 405 and a downward pressure spring 406. The detection installation column 401 is fixedly installed at the end of the winding belt 202; the limit groove 4011 is provided on the detection installation column 401; the movable plate 402 is slidably installed on the detection installation column 401; the compression spring 403 is fixedly installed on the side of the movable plate 402, and the other end of the compression spring 403 is fixedly installed inside the detection installation column 401 ; A micro switch 404 is fixedly mounted on the moving plate 402; the extrusion head 405 is slidably mounted on the detection mounting column 401; the tail of the extrusion head 405 is attached to the micro switch 404; the end of the extrusion head 405 is a hemispherical structure; the extrusion head 405 passes through the limit groove 4011; the downward pressure spring 406 is sleeved on the detection mounting column 401; the micro switch 404 is used to detect the liquid level; the floating member 5 includes: a floating cylinder 501, an extrusion limit protrusion 502 and a buoyancy ring 503, the floating cylinder 501 is slidably sleeved on the detection mounting column 401; the inner side of the floating cylinder 501 The extrusion limiting protrusion 502 is fixedly installed; the extrusion limiting protrusion 502 is an arc-shaped structure; the extrusion limiting protrusion 502 is located in the limiting groove 4011; the extrusion limiting protrusion 502 is used to press the extrusion head 405, and the downward pressure spring 406 is connected between the floating cylinder 501 and the detection installation column 401. The floating part 5 is used to cooperate with the liquid level detection part 4 to accurately indicate the liquid level position. The buoyancy generated by the floating part 5 when it is in contact with the liquid surface can slide on the detection installation column 401, ensuring accurate structural detection, and there is no need to use a traditional air gauge in the process of entering. When performing detection work, it is necessary to observe the oil contamination height of the lead sinker with human eyes. The oil on the surface of the lead sinker is accurately low when it is pulled out. This structure can accurately adjust the fitting position of the buoyancy ring 503 and the detection installation column 401. This structure uses a slidable buoyancy ring 503 to ensure accurate detection and can remind the staff that the position meets the standard. The staff can directly read the reading through the winding belt 202. The extrusion head 405 squeezes the extrusion limit protrusion 502 set. At this time, the micro switch 404 is squeezed, and the alarm light 802 is controlled to light up and alarm to provide a prompt.

[0039] In the embodiment of the present invention, the booster 6 includes: a booster cylinder 601, a drive motor 602 and a booster impeller 603, the booster cylinder 601 is fixedly mounted at the bottom of the detection mounting column 401; a drive motor 602 is installed inside the booster cylinder 601; a booster impeller 603 is fixedly mounted on the output shaft of the drive motor 602; the booster impeller 603 is used to rotate below the oil level; the stabilizing member 7 includes: a stabilizing shell 701 and a stabilizing fin 702, the stabilizing shell 701 is fixedly mounted at the bottom of the booster cylinder 601; a circle of through holes is provided on the outside of the stabilizing shell 701, and the circle of through holes on the outside of the stabilizing shell 701 is located above the booster impeller 603; six stabilizing fins 702 are equidistantly installed on the outside of the stabilizing shell 701; the six stabilizing fins 702 are used to be inserted below the oil level; by using the stabilizing member 7 on the outside of the booster 6, it is possible to explore below the oil level, and by utilizing the high viscosity of the oil, active downward pressure assistance work can be performed, and the booster The downward pressure generated by the rotation of the impeller 603 can assist in straightening the winding belt 202, and prevent the winding belt 202 from continuing to be lowered when the buoyancy ring 503 touches the liquid surface, causing the winding belt 202 to bend without being discovered, resulting in the problem of affecting the accuracy of liquid level detection. At the same time, the booster impeller 603 is not affected by the liquid level inside the storage tank. Even if the liquid level inside the storage tank is low and there is a large amount of sediment, the booster impeller 603 can be used for mixing and sinking drive, which can increase the practicality of the structure and avoid the problem that the traditional counterweight lead sinker cannot continue to sink and pull normally when the liquid level is low and there is a large amount of sediment. This structure can ensure the straightening effect of the winding belt 202 during actual detection. At the same time, the structure is compact. Compared with the use of counterweights and other methods, it can improve the portability of the staff. It is also more suitable for viscous petroleum measurement. The stabilizing fins 702 can be used to assist in increasing stability on the outside of the booster impeller 603.

[0040] Embodiment 2, on the basis of embodiment 1, the volatile collection part 8 comprises: a protective plate 801, an alarm light 802 and a sealing sheet 803, the protective plate 801 is fixedly mounted with the alarm light 802; the protective plate 801 is fixedly mounted on the two wheel frame plates 101 by bolts; a sealing sheet 803 is fixedly mounted in the middle of the protective plate 801; the inner side of the sealing sheet 803 fits through the winding belt 202; the protective plate 801 is used to cover the oil tank detection port; the micro switch 404 is electrically connected to the alarm light 802; the sealing sheet 803 is made of rubber material and does not affect the lowering of the winding belt 202; the volatile collection part 8 also comprises: an exhaust pipe 804 and a soft The air bag 805 and the exhaust pipe 804 are fixedly mounted on the protective plate 801; a soft air bag 805 is fixedly mounted on the exhaust pipe 804; a valve is arranged on the exhaust pipe 804; the soft air bag 805 is used to collect volatile gases in the storage tank, and the volatile collection part 8 is adopted, and the protective plate 801 can be used to reduce the volatile amount on the one hand, and at the same time, the protective plate 801 can be used to limit the position. The diameter of the detection port of the traditional oil storage tank is usually larger than the size of the detection handpiece 1. There is a risk that the detection handpiece 1 will slip and fall off the storage tank. This structure can play a role in limiting and preventing it from falling, and also avoid the potential safety hazard caused by the direct discharge of excessive volatile gases into the air.

[0041] The working principle of this embodiment is as follows: first, quickly open the inspection port of the storage tank, and then buckle the protective plate 801 cover on the inspection port of the storage tank. After the staff conducts relevant inspections, a large amount of volatile gas enters the soft air bag 805, and after the winding belt 202 is wound up, the valve of the exhaust pipe 804 is tightened, and then the inspection port of the storage tank is quickly closed, and the internal gas of the soft air bag 805 is subsequently released in an open and non-hazardous area; during the inspection, hold the handle 1012 and rotate the rocker arm 301 to lower the winding belt 202, and the floating member 5 is floated under the action of its own gravity. When the rocker arm 301 is rotated, the limit pin 302 needs to be pulled out. When the winding belt 202 is lowered, the limit pin 302 is inserted into the wheel frame plate 101 to perform positioning work to prevent the winding belt 202 wound on the winding wheel 201 from falling off. When the winding belt 202 is lowered, the buoyancy ring 503 is used to generate buoyancy when it is attached to the liquid surface. At this time, the detection installation column 401 continues to probe downward, driving the extrusion head 405 to squeeze the extrusion limit protrusion 502 set. At this time, the micro switch 404 is squeezed to realize control The alarm light 802 lights up to alarm. At this time, the size of the winding belt 202 reaching the liquid level is extremely accurate. Just observe the reading of the winding belt 202 displayed on the outside of the detection interlaced block 102. If the detection installation column 401 continues to descend, the extrusion head 405 will pass over the extrusion limit protrusion 502. At this time, the micro switch 404 is no longer squeezed, and the control alarm light 802 can be turned off. At this time, it can be prompted that the staff needs to lift the winding belt 202, which drives the detection installation column 401 to move up, ensuring the overall detection accuracy of the structure, which can not only ensure the buoyancy ring 50 3 is attached to the liquid surface, which will not cause problems such as excessive sinking, and can ensure the accurate position of the detection installation column 401, so as to ensure the accuracy of the reading of the staff. By subtracting the reading size, i.e. the liquid level data, from the total height of the tank body, the stabilizing fin 702 is used to fit the oil to increase the resistance, so as to improve the stability of the rotation of the booster impeller 603. The booster impeller 603 is driven to rotate by the driving motor 602. At this time, the oil is discharged through a circle of through holes provided on the outer side of the stabilizing shell 701 under the rotation of the booster impeller 603. The downward pressure generated can straighten the winding belt 202 to ensure accurate reading.

[0042] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petrochemical tank liquid level detection device, comprising a detection hand piece (1), wherein a winding piece (2) is mounted on the detection hand piece (1); the characteristics are: The winding piece (2) is used to detect the liquid level; a positioning piece (3) is installed on the winding piece (2); an end of the positioning piece (3) is plugged into the detection handheld piece (1); A liquid level detection component (4) is fixedly mounted on the end of the winding component (2); a floating component (5) is mounted on the liquid level detection component (4); the floating component (5) is used to float on the liquid surface of the storage tank; A booster (6) is installed at the bottom of the liquid level detection component (4), and the booster (6) is used to pull down the winding component (2); a stabilizing component (7) is installed at the bottom of the booster (6); the stabilizing component (7) is used to increase the rotational stability of the booster (6); The liquid level detection component (4) comprises: a detection installation column (401), a limit groove (4011), a movable plate (402), a compression spring (403), a micro switch (404), an extrusion head (405) and a downward pressure spring (406); The booster component (6) comprises: a booster cylinder (601), a drive motor (602) and a booster impeller (603); the booster cylinder (601) is fixedly mounted on the bottom of the detection mounting column (401); The stabilizing member (7) comprises: a stabilizing shell (701) and stabilizing fins (702); the stabilizing shell (701) is fixedly mounted on the bottom of the boost cylinder (601); The detection handheld device (1) is provided with a volatile collection portion (8); the volatile collection portion (8) is used to collect volatile gas in the storage tank; The detection handheld component (1) comprises: a wheel frame plate (101) and a spacer block (1011); two wheel frame plates (101) are provided, and the spacer block (1011) is connected between the two wheel frame plates (101) by bolts.

2. A petrochemical tank liquid level detection device according to claim 1, characterized in that: The detection handheld component (1) further comprises: a handle (1012) and a detection interpenetrating block (102); the handle (1012) is fixedly mounted on the spacer block (1011); the detection interpenetrating block (102) is connected between the two wheel frame plates (101) by bolts; and a socket is provided in the middle of the detection interpenetrating block (102).

3. A petrochemical storage tank liquid level detection device according to claim 2, characterized in that: The winding member (2) comprises: a winding wheel (201) and a winding belt (202); the two ends of the winding wheel (201) are rotatably mounted between two wheel frame plates (101); the winding belt (202) is fixedly mounted on the winding wheel (201); the winding belt (202) is provided with scale lines; the winding wheel (201) is used to wind up the winding belt (202); the winding belt (202) passes through a socket provided in the middle of the detection insertion block (102); and the two ends of the winding wheel (201) respectively pass through the two wheel frame plates (101).

4. A petrochemical storage tank liquid level detection device according to claim 3, characterized in that: The positioning member (3) comprises: a rocker arm (301), a limit pin (302) and a limit tension spring (303); the rocker arm (301) is fixedly mounted on the end of the winding wheel (201); the limit pin (302) is slidably inserted on the rocker arm (301); the end of the limit pin (302) is inserted on the wheel frame plate (101) on the same side; the limit tension spring (303) is sleeved on the limit pin (302); the limit tension spring (303) is connected between the limit pin (302) and the rocker arm (301); the limit pin (302) is used to be inserted into the wheel frame plate (101) to position the winding wheel (201).

5. A petrochemical storage tank liquid level detection device according to claim 3, characterized in that: The liquid level detection component (4) comprises: the detection installation column (401) is fixedly installed at the end of the winding belt (202); the detection installation column (401) is provided with a limit slot (4011); a movable plate (402) is slidably installed on the detection installation column (401); a compression spring (403) is fixedly installed on the side of the movable plate (402), and the other end of the compression spring (403) is fixedly installed inside the detection installation column (401); a micro switch (404) is fixedly installed on the movable plate (402); the extrusion head (405) is slidably installed on the detection installation column (401); the tail of the extrusion head (405) is attached to the micro switch (404); the end of the extrusion head (405) is a hemispherical structure; the extrusion head (405) passes through the limit slot (4011); the downward pressure spring (406) is sleeved on the detection installation column (401); and the micro switch (404) is used to detect the liquid level.

6. A petrochemical tank liquid level detection device according to claim 5, characterized in that: The floating member (5) comprises: a floating cylinder (501), an extrusion limiting protrusion (502) and a buoyancy ring (503); the floating cylinder (501) is slidably sleeved on the detection installation column (401); the extrusion limiting protrusion (502) is fixedly installed on the inner side of the floating cylinder (501); the extrusion limiting protrusion (502) is an arc-shaped structure; the extrusion limiting protrusion (502) is located in the limiting groove (4011); the extrusion limiting protrusion (502) is used to press the extrusion head (405); the downward pressure spring (406) is connected between the floating cylinder (501) and the detection installation column (401).

7. A petrochemical tank liquid level detection device according to claim 5, characterized in that: The booster component (6) comprises: a driving motor (602) installed inside the booster cylinder (601); a booster impeller (603) fixedly installed on the output shaft of the driving motor (602); and the booster impeller (603) is used to rotate below the petroleum liquid level.

8. A petrochemical storage tank liquid level detection device according to claim 7, characterized in that: The stabilizing member (7) comprises: a circle of through holes is arranged on the outside of the stabilizing shell (701), and the circle of through holes on the outside of the stabilizing shell (701) is located above the booster impeller (603); six stabilizing fins (702) are installed on the outside of the stabilizing shell (701) at equal intervals; and the six stabilizing fins (702) are used to be inserted below the oil level.

9. A petrochemical storage tank liquid level detection device according to claim 5, characterized in that: The volatile collection part (8) comprises: a protective plate (801), an alarm light (802) and a sealing sheet (803); the protective plate (801) is fixedly mounted with the alarm light (802); the protective plate (801) is fixedly mounted on two wheel frame plates (101) by means of bolts; a sealing sheet (803) is fixedly mounted in the middle of the protective plate (801); the inner side of the sealing sheet (803) is fitted through a winding belt (202); the protective plate (801) is used to cover and buckle the oil tank detection port; and the micro switch (404) is electrically connected to the alarm light (802).

10. A petrochemical storage tank liquid level detection device according to claim 9, characterized in that: The volatile gas collection part (8) further comprises: an exhaust pipe (804) and a soft gas bag (805); the exhaust pipe (804) is fixedly mounted on the protective plate (801); the soft gas bag (805) is fixedly mounted on the exhaust pipe (804); a valve is provided on the exhaust pipe (804); and the soft gas bag (805) is used to collect volatile gas in the storage tank.

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