Wireless detection system for oxygen content in storage tanks

Abstract

The present invention discloses a wireless detection system for the oxygen content of a storage tank, which belongs to the field of grain and oil storage. The wireless detection system for the oxygen content of a storage tank comprises an oil tank, a hard pipe, a quick-release mechanism connected to the upper end of the oil tank is arranged on the outside of the hard pipe, the lower end of the hard pipe extends into the interior of the hard pipe and is axially inserted with a rotating shaft, an auger is wound around the outside of the rotating shaft, an oil-filled submersible motor is arranged inside the oil tank, the output end of the oil-filled submersible motor is axially connected to the lower end of the rotating shaft, a support bearing is further installed on the outside of the rotating shaft at the lower end of the auger, a plurality of support rods are installed between the outer side of the support bearing and the inner side of the hard pipe; an air pipe is connected, one end of the air pipe is connected to the end of the hard pipe away from the oil tank, and the other end is bent toward the horizontal plane, so that the oil stains adhering to the inner wall of the hard pipe can be scraped off, thereby facilitating the reduction of the oil stains blocking the wireless detection system and facilitating the improvement of the continuity of the oxygen content detection in the storage tank.

Description

Technical Field

[0001] The present invention relates to the field of grain and oil storage, and more particularly to a wireless detection system for oxygen content in storage tanks. Background Art

[0002] During the circulation of grain and oil, they are generally stored in storage tanks to maintain the original quality of the grain as much as possible. The fat content of vegetable oils is generally around 40-50%, and the minimum is around 20%. Fat is mainly composed of unsaturated fatty acids, which are easily affected by oxygen or microorganisms during storage, causing oxidation and hydrolysis. Therefore, it is necessary to regularly test the oxygen concentration in the storage tanks.

[0003] Existing grain and oil storage tanks are generally equipped with oxygen sensors and connected to the tanks, so that the tail gas of the storage tank flows into the oxygen sensor, analyzes the oxygen content in the tail gas, converts it into an electrical signal through the analog-to-digital converter, and transmits it to the control system, so that the on-duty personnel can understand the oxygen content in each storage tank in the duty room.

[0004] However, when detecting oxygen content in existing storage tanks, the tank and oxygen sensor are connected by an air pipe, and the air inlet of the air pipe extends into the interior of the tank. During the process of filling the tank from the top, especially when the liquid level approaches the air pipe, some oil splashes and adheres to the air inlet of the air pipe to form oil stains, which can easily cause blockage and result in the tank oxygen content detection being interrupted by the oil stains. To solve this problem, we propose a wireless oxygen content detection system for storage tanks. Summary of the Invention

[0005] Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of the present invention is to provide a wireless detection system for the oxygen content in a storage tank, which can scrape off the oil stains attached to the inner wall of the hard pipe, conveniently reduce the oil stains that block the wireless detection system, and help improve the continuity of the oxygen content detection in the storage tank.

[0007] Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] Wireless oxygen content detection system for storage tanks, including oil tanks,

[0010] A hard pipe, wherein the outside of the hard pipe is provided with a quick-release mechanism connected to the upper end of the oil tank, the lower end of the hard pipe extends into the interior of the hard pipe and is axially inserted with a rotating shaft, an auger is wound around the outside of the rotating shaft, an oil-filled submersible motor is provided inside the oil tank, the output end of the oil-filled submersible motor is axially connected to the lower end of the rotating shaft, a support bearing is further installed on the outside of the rotating shaft at the lower end of the auger, and a plurality of support rods are installed between the outer side of the support bearing and the inner side of the hard pipe;

[0011] A connecting air pipe, one end of which is connected to the end of the hard pipe away from the oil tank, and the other end of which is bent toward the horizontal plane for allowing the exhaust gas to flow out of the oil tank. A flushing mechanism connected to the connecting air pipe is provided on the upper surface of the oil tank;

[0012] A gas detection alarm, the air inlet end of which is connected to the other end of the air pipe, and is used to detect the oxygen content of the exhaust gas from the oil tank;

[0013] An A / D converter is provided outside the oil tank and is electrically connected to the gas detection alarm;

[0014] Wireless transmitting equipment, one group of the wireless transmitting equipment is connected to the gas detection alarm through an A / D converter. The wireless transmitting equipment of this group uploads the received oxygen content data to the cloud platform. Another group of the wireless transmitting equipment is connected to the base station through a G network cable, and can send the received data to the control system of the duty room. The wireless detection system is composed of the gas detection alarm, A / D converter, wireless transmitting equipment and corresponding base station to monitor the exhaust oxygen content in real time and send it to the control system of the duty room. The wireless transmission of the wireless detection system data is stable and reliable, reducing the occurrence of abnormal situations, which is conducive to improving the stability and safety of the wireless transmission of oxygen content data. At the same time, the oil-filled submersible motor is started to drive the auger to rotate around the support bearing, scraping off the oil stains attached to the inner wall of the hard pipe and discharging them from the air inlet of the hard pipe, which is convenient for reducing the oil stains blocking the wireless detection system and is conducive to improving the continuity of the oxygen content detection of the storage tank.

[0015] Furthermore, a nitrogen tank a is installed on the upper surface of the oil tank, and the gas outlet end of the nitrogen tank a is equipped with a gas pipe, and the outer side of the gas pipe is equipped with an electric gas valve a. One end of the gas pipe extends into the interior of the oil tank. When the oxygen content exceeds the specified range, the airflow in the gas detection alarm is kept unobstructed, and the electric gas valve a is opened. The nitrogen in the nitrogen tank a can flow into the oil tank through the gas pipe, squeezing out excess air.

[0016] Furthermore, a controller for controlling the electric gas valve a is installed on the upper surface of the oil tank. One end of the controller is connected to a warning light connected to the outer surface of the oil tank. The opening and closing of the electric gas valve a can be automatically controlled by the program of the controller. When the electric gas valve a is opened, the warning light is also controlled to work to issue an alarm and stop the refueling action of the corresponding oil tank 1 to avoid backflow of the oil caused by nitrogen blowing the oil.

[0017] Furthermore, the flushing mechanism includes a nitrogen tank b installed on the upper surface of the oil tank, the air outlet end of the nitrogen tank b is equipped with a flushing pipe, the outer side of the flushing pipe is equipped with an electric air valve b, one end of the flushing pipe extends into the inside of the connecting air pipe, the electric air valve b is controlled by the controller to open, the air path inside the flushing pipe is unobstructed, the nitrogen in the nitrogen tank b can be injected into the inside of the hard pipe along the flushing pipe, flushing the inner wall of the hard pipe, blowing off the oil stains attached to the hard pipe, and facilitating the unblocking of the hard pipe.

[0018] Furthermore, four magnets are provided on the upper surface of the oil tank, and pillars are installed on the upper surfaces of the magnets in the vertical direction. Concave clips are installed on the upper ends of the pillars, and the concave clips are all concave structures with the opening direction facing away from the corresponding pillars. Two concave clips form the base a, and the other two concave clips form the base b, wherein the base a clamps the lower end of the gas detection alarm, and the base b clamps the lower end of the corresponding wireless sending device for fixation, which can further improve the stability and safety of gas oxygen content detection and wireless transmission.

[0019] Furthermore, the quick-release mechanism includes an externally threaded tube sleeved on the outside of the hard tube, one end of the externally threaded tube vertically passes through the upper end of the oil tank, and the other end of the externally threaded tube is provided with a plurality of notches. An internally threaded ring is installed on the outer thread of the externally threaded tube. The hard tube is passed through the externally threaded tube and inserted into the interior of the oil tank, and then the internally threaded ring is tightened. The externally threaded tube shrinks along the plurality of notches and clings to the outer wall of the hard tube, locking the hard tube under the action of friction. Conversely, the internally threaded ring is loosened, and the externally threaded tube opens along the plurality of notches under the action of stress, loosening the hard tube, thereby releasing the locked state of the hard tube and facilitating the quick removal of the hard tube.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This solution forms a wireless detection system through a gas detection alarm, an A / D converter, a wireless transmission device and a corresponding base station, which monitors the exhaust oxygen content in real time and sends it to the control system of the duty room. The wireless transmission of the wireless detection system data is stable and reliable, which reduces the occurrence of abnormal situations and is conducive to improving the stability and safety of the wireless transmission of oxygen content data. At the same time, the oil-filled submersible motor is started. Under the support of multiple support rods, the rotating shaft drives the auger to rotate around the support bearing, scraping off the oil stains attached to the inner wall of the hard pipe and discharging them from the air inlet of the hard pipe, which is convenient for reducing the oil stains blocking the wireless detection system and is conducive to improving the continuity of the oxygen content detection in the storage tank.

[0021] (2) When the auger of this scheme is working, the controller controls the electric air valve b to open, and the air path inside the flushing pipe is unblocked. The nitrogen in the nitrogen tank b can be injected into the inside of the hard pipe along the flushing pipe to flush the inner wall of the hard pipe and blow off the oil stains attached to the hard pipe, making it easier to unclog the hard pipe.

[0022] (3) This solution consists of two concave clips forming base a and another two concave clips forming base b. Base a clamps the lower end of the gas detection alarm, and base b clamps the lower end of the corresponding wireless transmitting device for fixation, which can further improve the stability and safety of gas oxygen content detection and wireless transmission.

[0023] (4) In this solution, the hard pipe is passed through the external threaded pipe and inserted into the oil tank. The internal thread ring is then tightened. The external threaded pipe shrinks along multiple notches and fits tightly against the outer wall of the hard pipe, locking the hard pipe under the action of friction. Conversely, the internal thread ring is loosened. The external threaded pipe opens along multiple notches under the action of stress, loosening the hard pipe, thereby releasing the locked state of the hard pipe and facilitating quick removal of the hard pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the main view of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention from a top view;

[0026] Figure 3 It is a schematic cross-sectional structural diagram of the present invention;

[0027] Figure 4 For the present invention Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 5 For the present invention Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 6 For the present invention Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0030] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure at point D in the middle.

[0031] Description of the numbers in the figure:

[0032] 1. Oil tank; 2. Rigid pipe; 201. Rotating shaft; 202. Auger; 203. Oil-filled submersible motor; 204. Support bearing; 205. Support rod; 3. Connecting air pipe; 4. Gas detection alarm; 5. A / D converter; 6. Wireless transmitter; 7. Nitrogen tank a; 8. Gas pipe; 9. Electric valve a; 10. Controller; 11. Warning light; 12. Flushing pipe; 13. Nitrogen tank b; 14. Electric valve b; 15. Rotary joint; 16. Elbow; 17. Nozzle; 18. Magnet; 19. Pillar; 20. Concave clamp; 21. Foam sheet; 22. Externally threaded pipe; 23. Notch; 24. Internally threaded ring; 25. Sealing rubber ring. Implementation Method

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0034] See also Figure 1-7 , wireless detection system for oxygen content in storage tanks, including oil tank 1,

[0035] A hard tube 2 is provided on the outside of the hard tube 2 with a quick-release mechanism connected to the upper end of the oil tank 1. The lower end of the hard tube 2 extends into the interior of the hard tube 2 and is axially inserted with a rotating shaft 201. An auger 202 is wound around the outer side of the rotating shaft 201. An oil-filled submersible motor 203 is provided inside the oil tank 1. The output end of the oil-filled submersible motor 203 is axially connected to the lower end of the rotating shaft 201. A support bearing 204 is also installed on the outer side of the rotating shaft 201 at the lower end of the auger 202. A plurality of support rods 205 are installed between the outer side of the support bearing 204 and the inner side of the hard tube 2.

[0036] A connecting air pipe 3, one end of which is connected to the end of the rigid pipe 2 away from the oil tank 1, and the other end of which is bent toward the horizontal plane for exhaust gas to flow out of the oil tank 1. A flushing mechanism connected to the connecting air pipe 3 is provided on the upper surface of the oil tank 1;

[0037] The gas detection alarm 4 has its air inlet connected to the other end of the air pipe 3 and is used to detect the oxygen content of the tail gas from the oil tank 1. The gas detection alarm 4 is an ERUN-PG51S6 oxygen concentration sensor with pump-suction, self-alarm, sound and flashing features.

[0038] A / D converter 5, the A / D converter 5 is arranged outside the oil tank 1 and is electrically connected to the gas detection alarm 4;

[0039] Wireless sending device 6, a group of wireless sending devices 6 is connected to the gas detection alarm 4 through the A / D converter 5. This group of wireless sending devices 6 uploads the received oxygen content data to the Yunyue Cloud Platform. The Yunyue Cloud Platform uses Yunyuexin wireless terminal equipment purchased on the market and has a built-in China Mobile / China Unicom / China Telecom 4G card, which includes 1 year of traffic fees. Another group of wireless sending devices 6 is connected to the base station through a 4G network cable, and can send the received data to the control system of the duty room. The wireless sending device 6 uses a 600MHz ARM Cortex-A8 CPU, accesses the wireless network via Ethernet, and has a built-in 128MB Flash + 128MB DDR3 memory.

[0040] When the present invention is working, it is filled with grain oil, and a wireless detection system is formed by a gas detection alarm 4, an A / D converter 5, a wireless transmission device 6 and a corresponding base station. When the tail gas in the oil tank 1 escapes, it flows into the gas detection alarm 4 along the hard pipe 2 and the connecting air pipe 3, and the oxygen content of the tail gas is monitored in real time. The electric signal is converted by the A / D converter 5, and sent to the Yunyuexin cloud platform by a group of wireless transmission devices 6, and then sent to the control system of the duty room through another group of wireless transmission devices 6, so that the duty personnel can understand the data of the oxygen content in each oil tank 1 in real time through the wireless detection system. The wireless detection system The wireless transmission of system data is stable and reliable, which reduces the occurrence of abnormal situations and is beneficial to improving the stability and safety of the wireless transmission of oxygen content data. Part of the oil splashes onto the inner wall of the hard pipe 2 to form oil stains. At the same time, the oil-filled submersible motor 203 is started to rotate the rotating shaft 201 and the auger 202. Under the support of multiple support rods 205, the rotating shaft 201 drives the auger 202 to rotate around the support bearing 204. The auger 202 scrapes off the oil stains attached to the inner wall of the hard pipe 2 and discharges them from the air inlet of the hard pipe 2, which is convenient for reducing the oil stains that block the wireless detection system and is beneficial to improving the continuity of the oxygen content detection in the storage tank.

[0041] See Figure 2 and Figure 5 A nitrogen tank a7 is also installed on the upper surface of the oil tank 1. The gas outlet end of the nitrogen tank a7 is equipped with a gas pipe 8, and the outer side of the gas pipe 8 is equipped with an electric gas valve a9. One end of the gas pipe 8 extends into the interior of the oil tank 1. When the oxygen content exceeds the specified range, the airflow in the gas detection alarm 4 is kept unobstructed, and the electric gas valve a9 is opened. The gas pipe 8 is unobstructed, and the nitrogen in the nitrogen tank a7 can flow into the oil tank 1 through the gas pipe 8, squeezing out excess air, and allowing the oxygen to be discharged along the gas detection alarm 4 until the oxygen content drops to a certain range. Then the electric gas valve a9 is closed, the gas pipe 8 is sealed, and the nitrogen in the nitrogen tank a7 is blocked.

[0042] See Figure 1 、 Figure 2 and Figure 5 A controller 10 for controlling the electric valve a9 is also installed on the upper surface of the oil tank 1. The controller 10 is electrically connected to the A / D converter 5. One end of the controller 10 is connected to a warning light 11 connected to the outer surface of the oil tank 1. When the present invention is working, the A / D converter 5 also transmits the received electrical signal to the controller 10. The program of the controller 10 can be used to automatically control the opening and closing of the electric valve a9. When the electric valve a9 is opened, the warning light 11 is also controlled to work to give an alarm and stop the refueling action of the corresponding oil tank 1 to avoid backflow of oil caused by nitrogen blowing. On the contrary, the warning light 11 is controlled to go out and refueling can be carried out.

[0043] See Figure 1 and Figure 4The flushing mechanism includes a nitrogen tank b13 installed on the upper surface of the oil tank 1. The air outlet end of the nitrogen tank b13 is equipped with a flushing pipe 12. The outer side of the flushing pipe 12 is equipped with an electric air valve b14. One end of the flushing pipe 12 extends into the interior of the connecting air pipe 3. When the auger 202 of the present invention is working, the controller 10 controls the electric air valve b14 to open, and the air path inside the flushing pipe 12 is unobstructed. The nitrogen in the nitrogen tank b13 can be injected into the interior of the hard pipe 2 along the flushing pipe 12 to flush the inner wall of the hard pipe 2, blow off the oil stains attached to the hard pipe 2, and facilitate the dredging of the hard pipe 2.

[0044] See Figure 1 、 Figure 4 and Figure 7 A rotary joint 15 is fixedly installed at one end of the flushing tube 12 extending into the connecting air pipe 3. The central axis of the rotary joint 15 coincides with the central axis of the hard tube 2. A bent pipe 16 is fixedly installed at the end of the rotary joint 15 away from the flushing tube 12. When the flushing mechanism of the present invention is working, the rotary joint 15 and the bent pipe 16 are used to guide the outgoing nitrogen flow. The nitrogen flow exerts a reaction on the bent pipe 16, pushing the bent pipe 16 to rotate around the rotary joint 15, which can change the direction of the nitrogen flow and expand the flushing range.

[0045] See Figure 3 and Figure 7 A nozzle 17 is fixedly installed at one end of the elbow 16 away from the rotary joint 15, and the opening direction of the nozzle 17 deviates from the axis of the elbow 16. When the elbow 16 of the present invention is working, the nozzle 17 guides the outgoing nitrogen flow at the elbow 16, which can change the direction of the nitrogen flow, making it easier for the nitrogen flow to push the elbow 16 to rotate around the rotary joint 15.

[0046] See Figure 2 and Figure 6 Four magnets 18 are also provided on the upper surface of the oil tank 1. Pillars 19 are installed on the upper surfaces of the magnets 18 in the vertical direction. Concave clips 20 are installed on the upper ends of the pillars 19. The concave clips 20 are all concave structures with the opening direction facing away from the corresponding pillars 19. When the present invention is working, the four magnets 18 are used to respectively suck the upper surface of the oil tank 1, driving the corresponding pillars 19 and concave clips 20 to stand upright. Two concave clips 20 form a base a, and the other two concave clips 20 form a base b. The base a clamps the lower end of the gas detection alarm 4, and the base b clamps the lower end of the corresponding wireless sending device 6 for fixation, which can further improve the stability and safety of gas oxygen content detection and wireless transmission.

[0047] See Figure 2 and Figure 6The inner wall of the concave clamp 20 is bonded with a foam sheet 21 with a rectangular plate structure. When the concave clamp 20 of the present invention is working, it drives the foam sheet 21 to stick closely to the corresponding gas detection alarm 4 and wireless transmitting device 6. The deformation of the foam sheet 21 protects the gas detection alarm 4 and the wireless transmitting device 6 from being damaged by excessive squeezing.

[0048] See Figure 3 and Figure 7 The quick-release mechanism includes an externally threaded tube 22 sleeved on the outside of the hard tube 2, one end of the externally threaded tube 22 vertically passes through the upper end of the oil tank 1, and a plurality of notches 23 are opened along the other end of the externally threaded tube 22. An internally threaded ring 24 is installed on the outer thread of the externally threaded tube 22. When the present invention is working, the hard tube 2 is passed through the externally threaded tube 22 and inserted into the interior of the oil tank 1, and then the internally threaded ring 24 is tightened to squeeze the externally threaded tube 22 inward. The externally threaded tube 22 shrinks along the plurality of notches 23 and clings to the outer wall of the hard tube 2, locking the hard tube 2 under the action of friction. Conversely, the internally threaded ring 24 is loosened, and the externally threaded tube 22 opens along the plurality of notches 23 under the action of stress, loosening the hard tube 2, and releasing the locked state of the hard tube 2, making it convenient and quick to remove the hard tube 2 for maintenance or repair.

[0049] See Figure 3 and Figure 7 The external threaded tube 22 passes through one end of the oil tank 1 and is bonded with a sealing rubber ring 25. The inner side of the sealing rubber ring 25 is in close contact with the outer side of the rigid tube 2. When the rigid tube 2 of the present invention is locked, the sealing rubber ring 25 can be used to block the gap between the rigid tube 2 and the external threaded tube 22, thereby improving the sealing performance of the oil tank 1 and preventing oil leakage from the rigid tube 2.

[0050] Working principle: During operation, the hard tube 2 is passed through the external threaded tube 22 and inserted into the oil tank 1, and then the internal threaded ring 24 is tightened to squeeze the external threaded tube 22 inward. The external threaded tube 22 shrinks along multiple notches 23 and fits tightly against the outer wall of the hard tube 2. Under the action of friction, the hard tube 2 is locked and filled with grain oil. A wireless detection system is composed of a gas detection alarm 4, an A / D converter 5, a wireless transmitting device 6 and a corresponding base station. When the exhaust gas in the oil tank 1 escapes, it flows into the gas detection alarm 4 along the hard tube 2 and the connecting air pipe 3 to monitor the oxygen content of the exhaust gas in real time.

[0051] It is converted into an electrical signal by an A / D converter 5, sent to the Yunyuexin cloud platform by a group of wireless sending devices 6, and then sent to the control system of the duty room by another group of wireless sending devices 6, so that the duty personnel can understand the data of the oxygen content in each oil tank 1 in real time through the wireless detection system, and use four magnets 18 to respectively suck the upper surface of the oil tank 1, driving the corresponding pillars 19 and concave clamps 20 to stand upright. Two concave clamps 20 form a base a, and the other two concave clamps 20 form a base b. The base a clamps the lower end of the gas detection alarm 4, and the base b clamps the lower end of the corresponding wireless sending device 6 for fixation.

[0052] And part of the oil splashes onto the inner wall of the hard tube 2 to form oil stains. At the same time, the oil-filled submersible motor 203 is started, and the rotating shaft 201 and the auger 202 are rotated. Under the support of multiple support rods 205, the rotating shaft 201 drives the auger 202 to rotate around the support bearing 204. The auger 202 scrapes off the oil stains attached to the inner wall of the hard tube 2 and discharges them from the air inlet of the hard tube 2.

[0053] At the same time, the controller 10 controls the electric air valve b14 to open, the air path inside the flushing pipe 12 is unblocked, and the nitrogen in the nitrogen tank b13 can be injected into the hard pipe 2 along the flushing pipe 12 to flush the inner wall of the hard pipe 2 and blow off the oil stains attached to the hard pipe 2, making it easier to unclog the hard pipe 2.

[0054] Finally, the internal thread ring 24 is loosened, and the external threaded tube 22 opens along the multiple notches 23 under the action of stress, loosening the hard tube 2, and releasing the locked state of the hard tube 2, making it convenient to quickly remove the hard tube 2 for maintenance or repair.

[0055] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A wireless detection system for oxygen content in a storage tank, comprising an oil tank (1), characterized in that: A hard tube (2), wherein the outside of the hard tube (2) is provided with a quick-release mechanism connected to the upper end of the oil tank (1), a rotating shaft (201) is axially inserted into the inside of the hard tube (2), an auger (202) is wound around the outside of the rotating shaft (201), an oil-filled submersible motor (203) is provided inside the oil tank (1), an output end of the oil-filled submersible motor (203) is axially connected to the lower end of the rotating shaft (201), a support bearing (204) is further installed on the outside of the rotating shaft (201) at a position below the auger (202), and a plurality of support rods (205) are installed between the outside of the support bearing (204) and the inside of the hard tube (2); The quick-release mechanism comprises an externally threaded tube (22) sleeved on the outside of the hard tube (2), one end of the externally threaded tube (22) vertically passing through the upper end of the oil tank (1), and a plurality of notches (23) are provided along the other end of the externally threaded tube (22), and an internally threaded ring (24) is installed on the outer thread of the externally threaded tube (22). When working, the hard tube (2) is passed through the externally threaded tube (22) and inserted into the inside of the oil tank (1), and then the internally threaded ring (24) is tightened to press the externally threaded tube (22) inwardly, so that the externally threaded tube (22) shrinks along the plurality of notches (23) and is tightly attached to the outer wall of the hard tube (2), thereby locking the hard tube (2) under the action of friction. A connecting air pipe (3), one end of which is connected to an end of the hard pipe (2) away from the oil tank (1), and the other end of which is bent toward a horizontal plane for allowing tail gas to flow out of the oil tank (1); a flushing mechanism connected to the connecting air pipe (3) is provided on the upper surface of the oil tank (1); A gas detection alarm (4), wherein the air inlet end of the gas detection alarm (4) is connected to the other end of the connecting air pipe (3) and is used to detect the oxygen content of the tail gas of the oil tank (1); An A / D converter (5), the A / D converter (5) being arranged outside the oil tank (1) and electrically connected to the gas detection alarm (4); A wireless transmitting device (6), one group of the wireless transmitting devices (6) is connected to the gas detection alarm (4) via an A / D converter (5), and the wireless transmitting devices (6) in this group upload the received oxygen content data to the cloud platform, and another group of the wireless transmitting devices (6) is connected to the base station via a 4G network cable, and can send the received data to the control system of the duty room.

2. The wireless detection system for oxygen content in a storage tank according to claim 1, characterized in that: A nitrogen tank a (7) is also installed on the upper surface of the oil tank (1), and a gas pipe (8) is installed at the gas outlet end of the nitrogen tank a (7). An electric gas valve a (9) is installed on the outer side of the gas pipe (8), and one end of the gas pipe (8) extends into the interior of the oil tank (1).

3. The wireless detection system for oxygen content in a storage tank according to claim 2, characterized in that: A controller (10) for controlling the electric gas valve a (9) is also mounted on the upper surface of the oil tank (1), and one end of the controller (10) is connected to a warning light (11) connected to the outer surface of the oil tank (1).

4. The wireless detection system for oxygen content in a storage tank according to claim 1, characterized in that: The flushing mechanism comprises a nitrogen tank b (13) mounted on the upper surface of the oil tank (1), a flushing pipe (12) being mounted on the gas outlet end of the nitrogen tank b (13), an electric air valve b (14) being mounted on the outer side of the flushing pipe (12), and one end of the flushing pipe (12) extending into the interior of the connecting air pipe (3).

5. The wireless detection system for oxygen content in a storage tank according to claim 4, characterized in that: A rotary joint (15) is fixedly mounted on one end of the flushing pipe (12) extending into the interior of the connecting air pipe (3); the central axis of the rotary joint (15) coincides with the central axis of the hard pipe (2); and a bend (16) is fixedly mounted on the end of the rotary joint (15) away from the flushing pipe (12).

6. The wireless detection system for oxygen content in a storage tank according to claim 5, characterized in that: A nozzle (17) is fixedly mounted on one end of the curved pipe (16) away from the rotary joint (15), and the opening direction of the nozzle (17) deviates from the axis of the curved pipe (16).

7. The wireless detection system for oxygen content in a storage tank according to claim 1, characterized in that: Four magnets (18) are further provided on the upper surface of the oil tank (1), and pillars (19) are installed on the upper surfaces of the magnets (18) in a vertical direction. Concave clips (20) are installed on the upper ends of the pillars (19), and the concave clips (20) are all concave structures with their opening directions facing away from the corresponding pillars (19).

8. The wireless detection system for oxygen content in a storage tank according to claim 7, characterized in that: The inner walls of the concave clips (20) are bonded with foam sheets (21) in a rectangular plate structure.

9. The wireless detection system for oxygen content in a storage tank according to claim 1, characterized in that: One end of the externally threaded pipe (22) passing through the oil tank (1) is bonded with a sealing rubber ring (25), and the inner side of the sealing rubber ring (25) is in close contact with the outer side of the hard pipe (2).

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