Oil gas volatilization concentration monitoring device and monitoring system of crude oil storage tank

Abstract

The invention discloses an oil gas volatilization concentration monitoring device and monitoring system of a crude oil storage tank, the monitoring device comprises an oil tank body, a body mechanism, a probe cleaning mechanism, a heat dissipation mechanism and a driving mechanism, the oil tank body is internally provided with a floating plate; the body mechanism comprises an oil gas monitoring probe installed on a floating plate, an installation sleeve is installed on the floating plate in a penetrating mode, and the oil gas monitoring probe is installed in the installation sleeve in a coaxial mode. The probe cleaning mechanism is arranged, scraping plates are arranged on the periphery and the bottom of the side wall of the probe respectively, condensation layers on the side wall and the bottom of the probe are scraped and cleaned when the scraping plates rotate, and meanwhile the scraping plates can spray dry nitrogen to the surface of the probe through a purging assembly; therefore, on-line cleaning of a condensation layer on the surface of the probe is achieved in a scraping and purging combined mode, the probe can monitor the volatilization concentration of oil gas in an oil tank in real time, leakage and explosion risks are prevented, and the safety of the oil tank is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas monitoring, and particularly relates to an oil and gas volatile concentration monitoring device and monitoring system for a crude oil storage tank. BACKGROUND

[0002] The oil and gas volatile concentration monitoring device for a crude oil storage tank can prevent leakage and explosion risks by monitoring the oil and gas concentration in the tank and the surrounding environment in real time, ensure safe production, control VOCs emission in line with environmental protection regulations, improve management efficiency through data recording and analysis, and ensure stable operation of the storage and transportation system.

[0003] When the oil and gas volatile concentration monitoring device is in use, heavy hydrocarbons and waxes in the oil and gas condense on the surface of the probe, which seriously hinders the diffusion of the gas to the sensor, resulting in slow response, low reading or complete failure. The probe needs to be manually disassembled and cleaned, which causes inconvenience in cleaning the probe and affects real-time monitoring of the oil and gas, and there is a safety hazard. At the same time, the use of the probe is affected by the temperature of the monitored environment, which causes the temperature of the probe to be too high, resulting in distortion of the monitoring data of the probe.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present application and should not be regarded as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0005] The present application aims to provide an oil and gas volatile concentration monitoring device and monitoring system for a crude oil storage tank, which can solve the problem of inconvenience in cleaning the surface of the probe affecting real-time monitoring of the oil and gas, and the problem of the temperature of the probe being too high due to the influence of the temperature of the monitored environment, resulting in distortion of the monitoring data of the probe.

[0006] To achieve the above-mentioned purpose, the technical solutions provided by an embodiment of the present application are as follows:

[0007] The application discloses a volatile concentration monitoring device for oil and gas of a crude oil storage tank, which comprises an oil tank body, a body mechanism, a probe cleaning mechanism, a heat dissipation mechanism and a driving mechanism, wherein a floating plate is arranged in the oil tank body; the body mechanism comprises an oil and gas monitoring probe arranged on the floating plate, a mounting sleeve is arranged on the floating plate in a penetrating mode, and the oil and gas monitoring probe is arranged in the mounting sleeve in a coaxial mode; the probe cleaning mechanism comprises a pair of first scrapers and a pair of second scrapers arranged in the mounting sleeve in a rotating mode, the pair of first scrapers and the pair of second scrapers are arranged on the periphery of the side wall of the oil and gas monitoring probe in an annular and interlaced mode, a third scraper is arranged on the lower end of the oil and gas monitoring probe in a rotating mode, the pair of first scrapers and the third scraper are provided with a blowing assembly, and the probe cleaning mechanism further comprises an auxiliary assembly for driving the first scraper, the scraper protrusion and the third scraper to rotate and supplying gas to the first scraper and the third scraper; the heat dissipation mechanism comprises a heat conduction block arranged between the outer side of the oil and gas monitoring probe and the inner side wall of the mounting sleeve; and the driving mechanism comprises a plurality of H-shaped fan blades arranged on the upper end of the mounting sleeve.

[0008] In one or more embodiments of the application, the floating plate is provided with a mounting hole, the floating plate is fixedly connected with a mounting flange at the mounting hole, the mounting sleeve is sleeved in the mounting flange, and a plurality of fixing bolts are arranged between the mounting flange and the mounting sleeve.

[0009] In one or more embodiments of the application, the first scraper is integrally formed with a pair of scraper protrusions at the front and rear ends of the side wall of the oil and gas monitoring probe, the opposite surfaces of the pair of scraper protrusions are provided as inclined surfaces, one end of the scraper protrusion close to the oil and gas monitoring probe is attached to the outer side wall of the oil and gas monitoring probe, and a spacing is arranged between one end of the second scraper close to the oil and gas monitoring probe and the oil and gas monitoring probe.

[0010] In one or more embodiments of the application, the scraper protrusion and the third scraper are made of a mixed material of PTFE and graphene, the second scraper is made of a hard alloy material, an oil and gas guide cover is arranged on the inner side wall of the mounting sleeve below the third scraper, the oil and gas guide cover is provided as a conical structure with a small upper end and a large lower end, and the oil and gas guide cover is made of a corrosion-resistant elastic material.

[0011] In one or more embodiments of the present application, the blowing assembly comprises a plurality of nozzles mounted on the side wall of the oil and gas monitoring probe in an equidistant downward manner, a plurality of injection holes are formed on the side wall of the oil and gas monitoring probe in a manner inclined to the oil and gas monitoring probe, the blowing assembly further comprises a plurality of blowing holes formed on the third scraper in an equidistant transverse manner, a gas conveying chamber is formed in the first scraper and the third scraper, and an L-shaped hollow rod is fixedly connected between the lower end of the first scraper and the end of the third scraper.

[0012] In one or more embodiments of the present application, the auxiliary assembly comprises a first annular chamber formed in the mounting sleeve, a pair of annular rotating blocks arranged in an upward and downward manner and rotatably connected in the first annular chamber, a pair of annular sliding rails are formed on the inner side wall of the mounting sleeve at the position of mounting the pair of annular rotating blocks, a hollow connecting block is fixedly connected between the pair of annular rotating blocks and the first scraper through the pair of annular sliding rails, a second annular chamber is formed in each of the pair of annular rotating blocks, the second annular chamber is in communication with the gas conveying chamber in the first scraper through the hollow connecting block, and a solid connecting block is fixedly connected between the pair of annular rotating blocks and the second scraper through the pair of annular sliding rails.

[0013] In one or more embodiments of the present application, a gas conveying pipe and a plurality of connecting rods are fixedly connected between the pair of annular rotating blocks and on the upper side wall of the annular rotating block arranged above, the upper end of the gas conveying pipe and the plurality of connecting rods arranged on the annular rotating block above are fixedly connected with a rotating ring, the rotating ring is arranged above the mounting sleeve in a rotatable manner, an annular air inlet groove is formed on the side wall of the rotating ring, a gas conveying ring is rotatably connected to the outside of the annular air inlet groove, an air inlet pipe is fixedly connected to the side wall of the gas conveying ring, an electromagnetic valve is mounted on the air inlet pipe, a supporting block is fixedly connected to the lower end of the annular rotating block below, a pair of annular mounting grooves are formed on the lower end side wall of the supporting block and the bottom groove wall of the first annular chamber, and a plurality of ball bearings are mounted between the pair of annular mounting grooves.

[0014] In one or more embodiments of the present application, a containing chamber is formed in the heat conducting block, the containing chamber is filled with a phase change material, a heat dissipation block is fixedly connected to the upper end of the heat conducting block above the mounting sleeve, a plurality of heat conducting rods are fixedly connected to the lower end of the heat dissipation block in an equidistant manner, the lower end of the plurality of heat conducting rods extends into the containing chamber, and a plurality of heat dissipation fins are fixedly connected to the outer side wall of the heat dissipation block.

[0015] In one or more embodiments of the present application, a plurality of second connecting rods are fixedly connected to the rotating ring, a speed increasing gear box is mounted on the plurality of second connecting rods, a first connecting rod is fixedly connected to each of the plurality of H-shaped fan blades, one end of the first connecting rod away from the H-shaped fan blade is fixedly connected to the speed increasing gear box, and a manual rotating rod is fixedly connected to the side wall of the second connecting rod.

[0016] An oil gas volatilization concentration monitoring system of a crude oil storage tank comprises a cloud platform arranged at a remote end, a monitoring terminal connected with the cloud platform and an oil gas volatilization concentration monitoring device.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1、The probe cleaning mechanism is provided with scrapers arranged on the periphery and the bottom of the side wall of the probe, and the scrapers can scrape and clean the condensation layer on the side wall and the bottom of the probe when rotating, and the scrapers can spray dry nitrogen gas to the surface of the probe through the blowing assembly, so that the condensation layer on the surface of the probe is cleaned on line through the combination of scraping and blowing, the probe can monitor the volatilization concentration of oil gas in the oil tank in real time, the risk of leakage and explosion is prevented, and the safety of the oil tank is ensured.

[0019] 2、The driving mechanism is arranged for driving the probe cleaning mechanism to rotate, and the rotation of the wind blade driven by the wind can drive the scrapers to rotate, so that the scrapers can rotate at irregular times under the influence of the wind, the probe is cleaned at irregular times, the attachment of the condensation layer on the surface of the probe is effectively prevented, the probe is cleaned without additional energy consumption, the surface of the probe is cleaned conveniently, and the maintenance cost is low.

[0020] 3、The heat dissipation mechanism is arranged, when the temperature of the probe is high, the probe transmits heat to the heat conduction block, the heat is absorbed by the phase change material in the heat conduction block, and then the heat is released to the outside through the action of the heat conduction rod and the heat dissipation fin, so that the influence of temperature on the probe is reduced, and the accuracy of the probe in monitoring the volatilization concentration of oil gas is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0022] Figure 1 It is an installation schematic view of the oil gas volatilization concentration monitoring device of the crude oil storage tank in an embodiment of the present application.

[0023] Figure 2 The installation schematic diagram of the floating plate of the oil gas volatile concentration monitoring device of a crude oil storage tank in an embodiment of the present application;

[0024] Figure 3 The cross-sectional view of the oil gas volatile concentration monitoring device of a crude oil storage tank in an embodiment of the present application;

[0025] Figure 4 The cross-sectional view of the oil gas volatile concentration monitoring device of a crude oil storage tank in an embodiment of the present application;

[0026] Figure 5 The schematic diagram of A in the present application Figure 4

[0027] The schematic diagram of B in the present application Figure 6 Figure 4 The schematic diagram of C in the present application

[0028] Figure 7 Figure 4 The schematic diagram of D in the present application

[0029] Figure 8 The schematic diagram of E in the present application Figure 4

[0030] The schematic diagram of E in the present application Figure 9 Figure 6 The schematic diagram of E in the present application

[0031] Figure 10 The exploded view of the rotating ring and the gas conveying ring in the present application

[0032] Figure 11 The schematic diagram of the probe cleaning mechanism in the present application

[0033] Figure 12 The schematic diagram of the driving mechanism in the present application

[0034] Figure 13 The schematic diagram of the heat dissipation block in the present application

[0035] Figure 14 The bottom view of the probe cleaning mechanism in the present application

[0036] Main figure mark explanation:

[0037] ​​​100-tank body, 101-floating plate, 1-body mechanism, 11-oil gas monitoring probe, 12-mounting flange, 13-mounting sleeve, 14-fixing bolt, 2-probe cleaning mechanism, 21-first scraper, 22-scraper protrusion, 23-second scraper, 24-nozzle, 25-injection hole, 26-gas conveying chamber, 27-first annular chamber, 28-annular sliding rail, 29-annular rotating block, 210-second annular chamber, 211-hollow connecting block, 212-solid connecting block, 213-gas conveying pipe, 214-connecting rod, 215-rotating ring, 216-annular air inlet groove, 217-gas conveying ring, 218-air inlet pipe, 219-solenoid valve, 220-supporting block, 221-annular mounting groove, 222-rolling ball, 223-third scraper, 224-blowing hole, 225-oil gas guide cover, 226-L-shaped hollow rod, 3-heat dissipation mechanism, 31-heat conducting block, 32- accommodating chamber, 33-phase change material, 34-heat dissipation block, 35-heat conducting rod, 36-heat dissipation fin, 4-driving mechanism, 41-H-shaped fan blade, 42-first connecting rod, 43-speed increasing gear box, 44-second connecting rod, 45-manual rotating rod. DETAILED DESCRIPTION

[0038] In order to enable persons skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should fall within the protection scope of the present application.

[0039] As Figures 1-4As shown, the oil gas volatile concentration monitoring device for crude oil storage tank in one embodiment of the present application comprises an oil tank body 100, a body mechanism 1, a probe cleaning mechanism 2, a heat dissipation mechanism 3 and a driving mechanism 4, the oil tank body 100 is internally provided with a floating plate 101; the body mechanism 1 comprises an oil gas monitoring probe 11 installed on the floating plate 101, the floating plate 101 is provided with a mounting sleeve 13 in a penetrating manner, and the oil gas monitoring probe 11 is coaxially installed in the mounting sleeve 13; the probe cleaning mechanism 2 comprises a pair of first scrapers 21 and a pair of second scrapers 23 installed in the mounting sleeve 13 in a rotating manner, the pair of first scrapers 21 and the pair of second scrapers 23 are arranged in an annular and interlaced manner on the peripheral wall of the oil gas monitoring probe 11, the lower end of the oil gas monitoring probe 11 is rotatably provided with a third scraper 223, the pair of first scrapers 21 and the third scraper 223 are both provided with a blowing assembly, and the probe cleaning mechanism 2 further comprises an auxiliary assembly for driving the first scraper 21, the scraper protrusion 22 and the third scraper 223 to rotate and supplying gas to the first scraper 21 and the third scraper 223; the heat dissipation mechanism 3 comprises a heat conduction block 31 installed between the outer side of the oil gas monitoring probe 11 and the inner side wall of the mounting sleeve 13; and the driving mechanism 4 comprises a plurality of H-shaped fan blades 41 installed on the upper end of the mounting sleeve 13.

[0040] The oil and gas volatile concentration monitoring device of the crude oil storage tank is used. First, the installation sleeve 13 is installed on the floating plate 101 in a penetrating manner, so that the installation sleeve 13 is in communication with the oil tank body 100, and the oil and gas monitoring probe 11 is coaxially installed in the installation sleeve 13, so that the volatile concentration of the oil and gas in the oil tank can be monitored through the installation sleeve 13; when the oil and gas monitoring probe 11 is installed in the installation sleeve 13, there is an installation space between the outer wall of the oil and gas monitoring probe 11 and the inner wall of the installation sleeve 13, so that the first scraper 21 and the second scraper 23 are located on the periphery of the side wall of the oil and gas monitoring probe 11, and the third scraper 223 is located at the lower end of the oil and gas monitoring probe 11. When the oil and gas monitoring probe 11 monitors the oil and gas, heavy hydrocarbons and waxes in the oil and gas will adhere to the side wall of the oil and gas monitoring probe 11 to form a condensation layer. In order to realize the online cleaning of the condensation layer adhered to the oil and gas monitoring probe 11, the first scraper 21, the scraper protrusion 22 and the third scraper 223 are driven to rotate by the auxiliary assembly. The rotation of the first scraper 21 can scrape and clean the oil film layer adhered to the side wall of the oil and gas monitoring probe 11, the rotation of the second scraper 23 can scrape and clean the wax layer, and the rotation of the third scraper 223 can scrape and clean the wax layer and the oil film layer at the bottom of the oil and gas monitoring probe 11, thereby realizing the online cleaning of the condensation layer on the oil and gas monitoring probe 11. The cleaning of the oil and gas monitoring probe 11 can be completed without disassembly, thereby enabling the oil and gas monitoring probe 11 to monitor the volatile concentration of the oil and gas in the oil tank in real time, preventing leakage and explosion risks, and ensuring the safety of the oil tank. In order to improve the cleaning effect of the oil and gas monitoring probe 11, nitrogen gas is blown to the surface of the oil and gas monitoring probe 11 by the blowing assembly when the first scraper 21 and the third scraper 223 scrape the side wall of the oil and gas monitoring probe 11, so as to effectively improve the cleaning effect of the surface of the oil and gas monitoring probe 11 by combining scraping with nitrogen blowing, thereby ensuring that the surface of the oil and gas monitoring probe 11 is clean and improving the monitoring accuracy of the oil and gas volatile concentration of the oil and gas monitoring probe 11. In order to realize the rotation of the first scraper 21, the scraper protrusion 22 and the third scraper 223, the first scraper 21, the scraper protrusion 22 and the third scraper 223 are driven to rotate synchronously by the auxiliary assembly under the action of the driving mechanism 4, thereby realizing the cleaning of the surface of the oil and gas monitoring probe 11. Meanwhile, the driving mechanism 4 drives the rotation of the first scraper 21, the scraper protrusion 22 and the third scraper 223 by the multiple H-shaped blades 41 under the action of wind, so that the rotation of the first scraper 21, the scraper protrusion 22 and the third scraper 223 can be realized without consuming additional energy, and the wind can drive the irregular rotation of the first scraper 21, the scraper protrusion 22 and the third scraper 223, thereby realizing the irregular online cleaning of the oil and gas monitoring probe 11, ensuring that the condensation layer on the surface of the oil and gas monitoring probe 11 is cleaned in time, and ensuring that the oil and gas monitoring probe 11 can be in continuous, rapid and effective contact with the oil and gas, so as to ensure that the real-time data monitored by the oil and gas monitoring probe 11 can reflect the real oil and gas volatile concentration in the oil tank.When the oil and gas monitoring probe 11 is too high in temperature to affect the monitoring data, the oil and gas monitoring probe 11 transfers heat to the heat-conducting block 31, which absorbs and conducts the heat away, so as to reduce the temperature of the oil and gas monitoring probe 11 and ensure the accuracy of the monitoring data of the oil and gas monitoring probe 11 when affected by high temperature.

[0041] As shown in Figure 2 and Figure 4 , the floating plate 101 is provided with a mounting hole, and the floating plate 101 is fixedly connected with a mounting flange 12 at the mounting hole. The mounting sleeve 13 is sleeved in the mounting flange 12, and a plurality of fixing bolts 14 are installed between the mounting flange 12 and the mounting sleeve 13. The mounting sleeve 13 can be stably installed on the floating plate 101 through the mounting flange 12, and the mounting sleeve 13 installed on the mounting flange 12 is convenient to disassemble and assemble, so as to facilitate the maintenance of the internal parts of the mounting sleeve 13.

[0042] As shown in Figure 11 and Figure 14 , the first scraper 21 is integrally formed with a pair of scraper protrusions 22 at the front and rear ends of the side wall facing the oil and gas monitoring probe 11. The opposite surfaces of the pair of scraper protrusions 22 are inclined surfaces, one end of the scraper protrusion 22 close to the oil and gas monitoring probe 11 is attached to the outer side wall of the oil and gas monitoring probe 11, and a gap is provided between one end of the second scraper 23 close to the oil and gas monitoring probe 11 and the oil and gas monitoring probe 11. Because the oil and gas monitoring probe 11 side wall will have a protruding oil wax layer and a surface oil film layer, a pair of scraper protrusions 22 with inclined surfaces are provided at the front end of the first scraper 21. The scraper protrusions 22 are in contact with the surface of the oil and gas monitoring probe 11, so that the scraper protrusions 22 can scrape and clean the oil film layer attached to the surface of the oil and gas monitoring probe 11. The second scraper 23 is used to scrape and clean the protruding oil wax layer attached to the oil and gas monitoring probe 11, and at the same time, the second scraper 23 avoids direct contact with the oil and gas monitoring probe 11, so that the second scraper 23 can clean the oil wax layer without damaging the surface of the oil and gas monitoring probe 11. Therefore, the oil and gas monitoring probe 11 surface can be completely cleaned through the alternating cleaning of the scraper protrusions 22 and the second scraper 23.

[0043] As shown in Figure 3 and Figure 4As shown, the scraper protrusion 22 and the third scraper 223 are both made of a mixed material of PTFE and graphene, so that the scraper protrusion 22 and the third scraper 223 can effectively prevent the oil wax and the oil film layer from adhering to the surface of the scraper protrusion 22 and the third scraper 223 while scraping and cleaning the side wall surface and the bottom surface of the oil and gas monitoring probe 11, thereby improving the scraping and cleaning effect of the condensate layer on the oil and gas monitoring probe 11 and preventing the scraper protrusion 22 and the third scraper 223 from damaging the surface of the oil and gas monitoring probe 11. The second scraper 23 is made of a hard alloy material, so that the second scraper 23 can efficiently clean the protruding oil wax layer. An oil and gas guide cover 225 is installed on the inner side wall of the mounting sleeve 13 below the third scraper 223. The oil and gas guide cover 225 is tapered from a small upper end to a large lower end. The oil and gas guide cover 225 is made of a corrosion-resistant elastic material, so that the oil and gas guide cover 225 can collect the oil and gas volatilized in the oil tank through the large lower end and then transport it through the small upper end to contact the oil and gas monitoring probe 11, thereby improving the monitoring rate of the oil and gas monitoring probe 11 and ensuring that the setting of the probe cleaning mechanism 2 does not affect the monitoring of the oil and gas volatilization concentration by the oil and gas monitoring probe 11. The elasticity of the oil and gas guide cover 225 can be changed to facilitate disassembly and assembly from the mounting flange 12.

[0044] As shown in Figure 4 , Figure 6 、 Figure 8 and Figure 9 , the purge assembly includes a plurality of nozzles 24 installed on the side wall of the first scraper 21 facing the oil and gas monitoring probe 11 in an equidistant manner from top to bottom. The plurality of nozzles 24 are provided with a plurality of injection holes 25 on the side wall facing the oil and gas monitoring probe 11 in an inclined manner toward the oil and gas monitoring probe 11. The purge assembly also includes a plurality of purge holes 224 provided on the third scraper 223 in a transverse equidistant manner. The first scraper 21 and the third scraper 223 are both provided with a gas conveying chamber 26. The plurality of nozzles 24 are in communication with the gas conveying chamber 26 in the first scraper 21, and the plurality of purge holes 224 are in communication with the gas conveying chamber 26 in the third scraper 223. The lower end of the first scraper 21 and the end of the third scraper 223 are connected together by an L-shaped hollow rod 226, so that the gas conveying chamber 26 in the first scraper 21 and the gas conveying chamber 26 in the third scraper 223 are in communication through the L-shaped hollow rod 226.

[0045] Specifically, when the protrusions 22 and the third scraper 223 scrape the sidewall and the bottom of the oil and gas monitoring probe 11 respectively, the plurality of nozzles 24 on the first scraper 21 and the plurality of blow holes 224 on the third scraper 223 blow nitrogen to the surface of the oil and gas monitoring probe 11, so that the combination of scraping and blowing can realize efficient cleaning of the surface of the oil and gas monitoring probe 11. The plurality of jet holes 25 on the nozzles 24 can obliquely jet the blowing gas to the surface of the oil and gas monitoring probe 11, thereby improving the effect of gas blowing and cleaning. The L-shaped hollow rod 226 is used to fix the first scraper 21 and the third scraper 223 together, so that the first scraper 21 can drive the third scraper 223 to rotate through the L-shaped hollow rod 226 when the first scraper 21 rotates, and the nitrogen in the first scraper 21 can be delivered to the third scraper 223 through the L-shaped hollow rod 226.

[0046] As shown in Figures 4-6 、 Figure 10 and Figure 11 , the auxiliary assembly includes a first annular chamber 27 opened in the mounting sleeve 13, and a pair of annular rotating blocks 29 arranged above and below and rotatingly connected in the first annular chamber 27. The inner side wall of the mounting sleeve 13 is provided with a pair of annular sliding rails 28 at the position where the pair of annular rotating blocks 29 are mounted. The pair of annular rotating blocks 29 are fixedly connected with hollow connecting blocks 211 between the first scraper 21 through the pair of annular sliding rails 28 respectively. The pair of annular rotating blocks 29 are both provided with second annular chambers 210. The second annular chambers 210 are communicated with the gas delivery chamber 26 in the first scraper 21 through the hollow connecting blocks 211. The pair of annular rotating blocks 29 are fixedly connected with solid connecting blocks 212 between the second scraper 23 through the pair of annular sliding rails 28 respectively.

[0047] Specifically, since the first scraper 21 and the second scraper 23 need to be cleaned by rotating the oil and gas monitoring probe 11, the rotation of the pair of annular rotating blocks 29 in the first annular chamber 27 can drive the hollow connecting block 211 and the solid connecting block 212 to rotate, and the rotation of the hollow connecting block 211 and the solid connecting block 212 can drive the first scraper 21 and the second scraper 23 to rotate, so that the first scraper 21 and the second scraper 23 rotate around the oil and gas monitoring probe 11 to clean the outer side wall of the oil and gas monitoring probe 11. At the same time, in order to realize the delivery of nitrogen in the first scraper 21, nitrogen is delivered into the second annular chamber 210, and the nitrogen in the second annular chamber 210 can enter the gas delivery chamber 26 through the hollow connecting block 211, so that the nitrogen is sprayed out through the nozzle 24 and the purge hole 224 to blow the surface of the oil and gas monitoring probe 11, so that the annular rotating block 29 can drive the first scraper 21 and the second scraper 23 to rotate while providing the first scraper 21 with gas for blowing. And through the pair of annular rotating blocks 29, the annular rotating block 29 is connected with the first scraper 21 and the second scraper 23 through the pair of hollow connecting blocks 211 and solid connecting blocks 212, which ensures the stability of the structure of the first scraper 21 and the second scraper 23 when rotating.

[0048] As shown in Figures 3-7 and Figure 10 A pair of annular rotating blocks 29 are fixedly connected with a gas delivery pipe 213 and a plurality of connecting rods 214 on the upper side wall of the annular rotating block 29 arranged above, the upper end of the gas delivery pipe 213 and the plurality of connecting rods 214 arranged on the upper annular rotating block 29 is fixedly connected with a rotating ring 215, the rotating ring 215 is arranged above the mounting sleeve 13 in a rotatable manner, the side wall of the rotating ring 215 is provided with an annular gas inlet groove 216, the rotating ring 215 is rotatably connected with a gas delivery ring 217 outside the annular gas inlet groove 216, the side wall of the gas delivery ring 217 is fixedly connected with a gas inlet pipe 218, the gas inlet pipe 218 is provided with an electromagnetic valve 219, the lower end of the annular rotating block 29 arranged below is fixedly connected with a supporting block 220, a pair of annular mounting grooves 221 are arranged on the lower end side wall of the supporting block 220 and the bottom groove wall of the first annular chamber 27, and a plurality of ball bearings 222 are arranged between the pair of annular mounting grooves 221.

[0049] Specifically, the nitrogen gas is communicated with the outside nitrogen tank through the air inlet pipe 218, so that the dry nitrogen gas is delivered into the annular air inlet groove 216 through the air delivery ring 217, the annular air inlet groove 216 delivers the nitrogen gas into the air delivery pipe 213, and the nitrogen gas is delivered into the second annular chamber 210 through the air delivery pipe 213, so that the hollow connecting block 211 delivers the nitrogen gas in the second annular chamber 210 into the air delivery chamber 26 for purging and cleaning the oil and gas monitoring probe 11. The air delivery ring 217 and the rotating ring 215 can rotate, so that the nitrogen gas delivered by the air inlet pipe 218 is not affected by the rotation of the rotating ring 215. The rotation of the rotating ring 215 drives the air delivery pipe 213 and the plurality of connecting rods 214 to rotate, so that the pair of annular rotating blocks 29 can be driven to rotate in the first annular chamber 27. In order to stabilize the rotation of the pair of annular rotating blocks 29 in the first annular chamber 27, the support block 220 is arranged at the lower end of the annular rotating block 29, and the plurality of balls 222 below the support block 220 can make the annular rotating block 29 rotate stably and agilely.

[0050] Optionally, since the rotation of the scraping and cleaning is irregularly driven by the wind, in order to efficiently use the nitrogen gas, the monitoring system controls the electromagnetic valve 219 to act through the rotation of the rotating ring 215, so that the rotating speed sensor is installed on the rotating ring 215. When the rotating speed of the rotating ring 215 is greater than the set value, the electromagnetic valve 219 is opened to deliver the nitrogen gas, and when the rotating speed of the rotating ring 215 is less than the set value, the electromagnetic valve 219 is automatically closed, so as to save the use amount of the nitrogen gas.

[0051] As shown in Figure 4 , Figure 5 and Figure 13 , the heat conduction block 31 is provided with a containing chamber 32, the containing chamber 32 is filled with a phase change material 33, the upper end of the heat conduction block 31 is fixedly connected with a heat dissipation block 34 above the mounting sleeve 13, the lower end of the heat dissipation block 34 is fixedly connected with a plurality of heat conduction rods 35 in an equal interval manner, the lower end of the plurality of heat conduction rods 35 extends into the containing chamber 32, and the outer side wall of the heat dissipation block 34 is fixedly connected with a plurality of heat dissipation fins 36.

[0052] Specifically, the oil and gas monitoring probe 11 transmits heat to the heat conduction block 31, the heat conduction block 31 transmits the heat to the phase change material 33, so that the phase change material 33 absorbs the heat, the heat absorbed by the phase change material 33 is transmitted to the heat dissipation block 34 through the plurality of heat conduction rods 35, and then the heat is dissipated to the outside through the heat dissipation block 34 and the plurality of heat dissipation fins 36, so as to adjust the temperature of the oil and gas monitoring probe 11, thereby effectively reducing or preventing the influence of high temperature on the monitoring data of the oil and gas monitoring probe 11, and ensuring the accurate measurement of the oil and gas evaporation concentration in high temperature.

[0053] AsFigure 4 and Figure 12 As shown in the figure, the rotating ring 215 is fixedly connected with a plurality of second connecting rods 44, the plurality of second connecting rods 44 are installed with a speed increasing gear box 43, the plurality of H-shaped wind blades 41 are fixedly connected with a first connecting rod 42, the first connecting rod 42 is fixedly connected to the speed increasing gear box 43 at the end away from the H-shaped wind blade 41, and the side wall of the second connecting rod 44 is fixedly connected with a manual rotating rod 45. Under the driving of the wind force, the plurality of H-shaped wind blades 41 are rotated, and when the plurality of H-shaped wind blades 41 drive the speed increasing gear box 43 to rotate, the rotating speed is improved through the speed regulation of the speed increasing gear box 43, so that the speed increasing gear box 43 drives the plurality of second connecting rods 44 to rotate after increasing the speed, the plurality of scraper protrusions 22 drive the rotating ring 215 to rotate, the rotation of the rotating ring 215 drives the annular rotating block 29 to rotate, and then the rotation of the first scraper 21 and the second scraper 23 is realized, so that the first scraper 21 and the second scraper 23 clean the oil and gas monitoring probe 11, which is realized without the need to provide additional power consumption, saving the cost of cleaning the oil and gas monitoring probe 11. Even if there is no wind for a long time, the condensation layer on the surface of the oil and gas monitoring probe 11 affects the monitoring of the oil and gas volatile concentration, and the manual rotating rod 45 manually drives the rotating ring 215 to rotate, so that the online cleaning of the surface of the oil and gas monitoring probe 11 can be realized. The H-shaped wind blade 41 can realize forward and reverse rotation under different wind directions when being blown by the wind, the cleaning effect of the oil and gas monitoring probe 11 is improved through the forward and reverse rotation, and in order to suppress the stall of the H-shaped wind blade 41, the problem is solved by installing a vortex generator, so that the H-shaped wind blade 41 can stably drive the rotating part to rotate.

[0054] In use, first, the mounting sleeve 13 is mounted on the floating plate 101 through the mounting flange 12, so that the mounting sleeve 13 is in communication with the oil tank body 100, and the oil gas monitoring probe 11 is installed in the mounting sleeve 13 in a coaxial manner with the mounting sleeve 13, so that the volatile concentration of the oil gas in the oil tank can be monitored through the mounting sleeve 13; when the oil gas monitoring probe 11 is installed in the mounting sleeve 13, the first scraper 21 and the second scraper 23 are located on the periphery of the side wall of the oil gas monitoring probe 11, and the third scraper 223 is located at the lower end of the oil gas monitoring probe 11. When the oil gas monitoring probe 11 monitors the oil gas, heavy hydrocarbons and waxes in the oil gas will adhere to the side wall of the oil gas monitoring probe 11 to form a condensation layer. In order to realize online cleaning of the condensation layer adhered to the oil gas monitoring probe 11, when the wind-driven H-shaped fan blade 41 rotates, the speed-increasing gear box 43 increases the rotating speed and drives the rotating ring 215 to rotate through the second connecting rod 44. The rotating ring 215 can drive a pair of annular rotating blocks 29 to rotate in the first annular chamber 27. When the annular rotating blocks 29 rotate, the hollow connecting block 211 and the solid connecting block 212 drive the first scraper 21 and the scraper protrusion 22 to rotate, respectively. At the same time, the first scraper 21 drives the third scraper 223 to rotate synchronously. The rotation of the first scraper 21 can remove the oil film layer adhered to the side wall of the oil gas monitoring probe 11 through the scraper protrusion 22. The rotation of the second scraper 23 can remove the wax layer. The rotation of the third scraper 223 can remove the wax layer and the oil film layer at the bottom of the oil gas monitoring probe 11 through scraping, thereby realizing online cleaning of the condensation layer on the oil gas monitoring probe 11. The cleaning of the oil gas monitoring probe 11 can be completed without disassembly, so that the oil gas monitoring probe 11 can monitor the volatile concentration of the oil gas in the oil tank in real time, prevent leakage and explosion risks, and ensure the safety of the oil tank.

[0055] Meanwhile, in order to improve the cleaning effect on the oil and gas monitoring probe 11, when the first scraper 21 and the third scraper 223 scrape the sidewall of the oil and gas monitoring probe 11, nitrogen gas is blown to the surface of the oil and gas monitoring probe 11 through the blowing assembly, so that the cleaning effect on the surface of the oil and gas monitoring probe 11 is effectively improved through the combination of scraping and nitrogen blowing, and the surface of the oil and gas monitoring probe 11 is cleaned, and the monitoring accuracy of the oil and gas monitoring probe 11 on the volatile concentration of oil and gas is improved. Specifically, when the rotating ring 215 rotates at a speed greater than a set value, the electromagnetic valve 219 is opened synchronously, and dry nitrogen gas can be delivered through the air inlet pipe 218. The air inlet pipe 218 delivers the dry nitrogen gas to the gas delivery ring 217, and the gas delivery ring 217 delivers the nitrogen gas to the annular air inlet groove 216. The annular air inlet groove 216 delivers the nitrogen gas to the gas delivery pipe 213, and the gas delivery pipe 213 delivers the nitrogen gas to the second annular chamber 210. The hollow connecting block 211 delivers the nitrogen gas in the second annular chamber 210 to the gas delivery chamber 26 for blowing and cleaning the oil and gas monitoring probe 11. When the temperature of the oil and gas monitoring probe 11 is too high to affect the monitoring data, the oil and gas monitoring probe 11 transmits heat to the heat conduction block 31, and the heat conduction block 31 absorbs and conducts the heat, so as to reduce the temperature of the oil and gas monitoring probe 11 and ensure the accuracy of the monitoring data of the oil and gas monitoring probe 11 when affected by high temperature.

[0056] The oil and gas volatile concentration monitoring system of the crude oil storage tank in an embodiment of the application comprises a cloud platform arranged at a remote end, a monitoring terminal connected with the cloud platform, and an oil and gas volatile concentration monitoring device.

[0057] Meanwhile, the monitoring system is provided with a program for controlling the opening and closing of the electromagnetic valve 219 according to the rotating speed of the rotating ring 215, and the program is a mature prior art which will not be described here.

[0058] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims to which they relate.

[0059] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An oil gas volatile concentration monitoring device for a crude oil storage tank, characterized by, The utility model relates to an oil tank body, a floating plate is installed in the oil tank body, a body mechanism is installed on the floating plate, the body mechanism comprises an oil and gas monitoring probe, an installation sleeve is installed on the floating plate in a penetrating manner, the oil and gas monitoring probe is coaxially installed in the installation sleeve, a probe cleaning mechanism is installed in the installation sleeve in a rotating manner, the probe cleaning mechanism comprises a pair of first scrapers and a pair of second scrapers, the pair of first scrapers and the pair of second scrapers are arranged in an annular and interlaced manner on the periphery of the side wall of the oil and gas monitoring probe, a third scraper is rotatably installed on the lower end of the oil and gas monitoring probe, the pair of first scrapers and the third scraper are provided with a blowing assembly, the probe cleaning mechanism further comprises an auxiliary assembly for driving the first scraper, the scraper protrusion and the third scraper to rotate and for supplying gas to the first scraper and the third scraper, a heat dissipation mechanism is installed between the outer side of the oil and gas monitoring probe and the inner side wall of the installation sleeve, and a driving mechanism is installed on the upper end of the installation sleeve and comprises a plurality of H-shaped fan blades. The floating plate is provided with a mounting hole, the mounting flange is fixedly connected to the floating plate at the mounting hole, the installation sleeve is sleeved in the mounting flange, and a plurality of fixing bolts are installed between the mounting flange and the installation sleeve. The first scraper is integrally formed with a pair of scraper protrusions at the front and rear ends of the side wall of the oil and gas monitoring probe, the opposite surfaces of the pair of scraper protrusions are inclined surfaces, the end of the scraper protrusion close to the oil and gas monitoring probe is attached to the outer side wall of the oil and gas monitoring probe, and a gap is formed between the end of the second scraper close to the oil and gas monitoring probe and the oil and gas monitoring probe. The scraper protrusion and the third scraper are made of a mixed material of PTFE and graphene, the second scraper is made of a hard alloy material, an oil and gas guide cover is installed below the third scraper on the inner side wall of the installation sleeve, the oil and gas guide cover is in a tapered structure with a small upper end and a large lower end, and the oil and gas guide cover is made of a corrosion-resistant elastic material. The blowing assembly comprises a plurality of nozzles installed on the side wall of the first scraper in an equidistant manner from top to bottom, a plurality of injection holes are formed on the side wall of the oil and gas monitoring probe in an inclined manner towards the oil and gas monitoring probe, a plurality of blowing holes are formed on the third scraper in a transverse equidistant manner, a gas supply chamber is formed in the first scraper and the third scraper, and an L-shaped hollow rod is fixedly connected between the lower end of the first scraper and the end of the third scraper. ​ 2. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 1, characterized by, ​ 3. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 1, characterized by, ​ 4. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 3, characterized by, ​ 5. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 1, characterized by, ​ 6. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 5, characterized by, The auxiliary assembly comprises a first annular chamber formed in the mounting sleeve, a pair of annular rotating blocks arranged above and below and rotationally connected in the first annular chamber, a pair of annular sliding rails formed in the inner side wall of the mounting sleeve at the positions where the pair of annular rotating blocks are mounted, hollow connecting blocks fixedly connected between the pair of annular rotating blocks and the first scraper through the pair of annular sliding rails respectively, second annular chambers formed in the pair of annular rotating blocks, the second annular chambers being communicated with the gas conveying chamber in the first scraper through the hollow connecting blocks, and solid connecting blocks fixedly connected between the pair of annular rotating blocks and the second scraper through the pair of annular sliding rails respectively.

7. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 6, characterized by, A gas conveying pipe and a plurality of connecting rods are fixedly connected between the pair of annular rotating blocks and on the upper side wall of the annular rotating block arranged above, the upper end of the gas conveying pipe and the plurality of connecting rods arranged on the annular rotating block arranged above is fixedly connected with a rotating ring, the rotating ring is arranged above the mounting sleeve in a rotatable manner, an annular air inlet groove is formed in the side wall of the rotating ring, a gas conveying ring is rotationally connected to the outer side of the rotating ring, an air inlet pipe is fixedly connected to the side wall of the gas conveying ring, an electromagnetic valve is mounted on the air inlet pipe, a supporting block is fixedly connected to the lower end of the annular rotating block arranged below, a pair of annular mounting grooves are formed in the lower end side wall of the supporting block and the bottom groove wall of the first annular chamber, and a plurality of rolling balls are mounted between the pair of annular mounting grooves.

8. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 7, characterized by, A containing chamber is formed in the heat conducting block, the containing chamber is filled with phase change material, a heat dissipation block is fixedly connected to the upper end of the heat conducting block on the upper side of the mounting sleeve, a plurality of heat conducting rods are fixedly connected to the lower end of the heat dissipation block in an equidistant manner, the lower end of the plurality of heat conducting rods extends into the containing chamber, and a plurality of heat dissipation fins are fixedly connected to the outer side wall of the heat dissipation block.

9. The oil and gas vapor concentration monitoring device for a crude oil storage tank according to claim 8, characterized by, A plurality of second connecting rods are fixedly connected to the rotating ring, a speed increasing gear box is mounted on the plurality of second connecting rods, a first connecting rod is fixedly connected to each of the plurality of H-shaped fan blades, the end of the first connecting rod away from the H-shaped fan blade is fixedly connected to the speed increasing gear box, and a manual rotating rod is fixedly connected to the side wall of the second connecting rod.

10. A system for monitoring the concentration of volatile hydrocarbons from a crude oil storage tank, comprising: The oil and gas volatile concentration monitoring device comprises a cloud platform arranged at a remote end, a monitoring terminal connected with the cloud platform, and an oil and gas volatile concentration monitoring device, wherein the oil and gas volatile concentration monitoring device is the oil and gas volatile concentration monitoring device according to any one of claims 1-9.

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