Oil-gas balance system

Abstract

The utility model belongs to the technical field of petroleum storage, and particularly relates to an oil-gas balance system which comprises a balance box, a replacement box is installed on the front surface of the balance box, a supporting seat is jointly installed outside the lower ends of the balance box and the replacement box, and a first gas sensor and a second gas sensor are symmetrically installed on the left side surface of the lower end of the supporting seat. A first cavity is formed in the right side of the interior of the replacement box, screening films are installed in the balance box and the first cavity, a second cavity is formed in the left side of the interior of the replacement box, and an adjusting mechanism is arranged in the second cavity. According to the oil tank, the screening film is arranged and can screen mixed gas of oil gas and nitrogen in the oil tank, the oil gas is screened out, and therefore the oil gas content of the mixed gas in the oil tank is reduced, and the safety of the oil tank is guaranteed; and through cooperation of the telescopic cylinder and the adjusting mechanism, the screening membrane in the first cavity can be moved into the balance box, and therefore the screening membrane can be automatically replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil storage, and in particular relates to an oil and gas balance system. Background Art

[0002] During the oil storage process, in order to prevent the leakage of oil and gas in the oil tank and reduce safety risks such as fire and explosion, nitrogen is usually filled into the oil tank as a protective gas. When the nitrogen concentration decreases, it is repeatedly filled. When the external temperature changes, the air pressure in the tank changes, and the negative pressure formed causes damage to the tank. The current method is to install a breathing valve at the exhaust hole. This method requires repeated filling of nitrogen, which is time-consuming, labor-intensive and costly.

[0003] A Chinese patent discloses a nitrogen filling device for oil tanks (authorization announcement number CN208070544U). This patented technology allows a flexible airbag to shrink and reduce its volume when the external temperature or air pressure changes, and to add nitrogen to the oil tank; or to buffer the nitrogen that expands and overflows from the oil tank, thereby automatically replenishing or buffering nitrogen according to changes in temperature and air pressure, and realizing free exchange of nitrogen in the oil tank and in the airbag. When the nitrogen loss volume or concentration reaches a certain level, the nitrogen filling device can be used to directly replenish the oil tank or airbag. The operation is convenient and the maintenance is simple, which reduces the operating cost of nitrogen replenishment and maintenance.

[0004] However, it still has disadvantages: it maintains the nitrogen concentration in the oil tank by the free exchange of nitrogen in the oil tank and nitrogen in the air bag. However, since the oil and gas will continue to evaporate, a mixed gas of nitrogen and oil and gas is formed in the oil tank. As the oil and gas continue to evaporate, the oil and gas content in the mixed gas will gradually increase, which will cause the oil and gas content in the air bag to increase. There is still a risk of oil and gas combustion and explosion caused by lightning strikes and static electricity. In addition, its concentration is increased by supplementing nitrogen, and the production cost of nitrogen is high, so its overall maintenance cost is very high. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-gas balance system to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An oil and gas balance system comprises a balance box, an air intake mechanism is arranged on the right side surface of the balance box, a third air pipe is connected through the left side surface of the balance box, a collecting pipe is connected through the right end of the lower surface of the balance box, a collecting tank is installed on the outside of one end of the collecting pipe, a replacement box is installed on the front surface of the balance box, a support seat is installed on the lower ends of the balance box and the replacement box, and a first gas sensor and a second gas sensor are symmetrically installed on the left side surface of the lower end of the support seat;

[0008] A telescopic cylinder is installed on the right surface of the replacement box, and a first chamber is opened on the right side of the interior of the replacement box. Screening membranes are installed inside the balance box and the first chamber, and an iron block is embedded and installed on the front surface of the screening membrane. A second chamber is opened on the left side of the interior of the replacement box, and an adjustment mechanism is arranged inside the second chamber.

[0009] Furthermore, the air intake mechanism comprises a fan, a first air pipe is installed at the air intake end of the fan, a valve is installed at one end of the first air pipe, and a second air pipe is installed at the air outlet end of the fan.

[0010] Furthermore, the adjustment mechanism includes a motor and an adjustment rod, a first gear is installed at the output end of the adjustment rod, a second gear is installed on the outside of the adjustment rod, and an adjustment block is threadedly connected to the outside of the adjustment rod at the rear side of the second gear, and an electromagnet is installed at the right end of the adjustment block.

[0011] Furthermore, the screening membrane inside the balance box moves through the front and rear surfaces of the balance box.

[0012] Furthermore, one end of the second air pipe penetrates and is connected to the right side surface of the balance box.

[0013] Furthermore, the motor is installed on the inner lower surface of the second chamber, the adjustment rod is rotatably connected to the inner front and rear side surfaces of the second chamber, the first gear is meshingly connected to the second gear, and the adjustment block is slidably connected to the inner wall between the first chamber and the second chamber.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with a screening membrane, which can screen the mixed gas of oil, gas and nitrogen in the oil tank, and screen out the oil and gas, thereby reducing the oil and gas content of the mixed gas in the oil tank and ensuring the safety of the oil tank. In this way, the medium stored in the oil tank will not be polluted and the cost is low.

[0016] 2. The utility model can move the screening membrane in the first chamber to the balance box through the cooperation of the telescopic cylinder and the adjustment mechanism, so as to automatically replace the screening membrane, thereby avoiding the use of the same screening membrane for too long and reducing the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the oil and gas balance system.

[0018] Figure 2 It is a schematic diagram of the structure of the air intake mechanism in the oil-gas balance system.

[0019] Figure 3 It is a partial top view of the oil and gas balance system.

[0020] Figure 4 Schematic diagram of the structure of the screening membrane in the oil and gas balance system.

[0021] Figure 5 It is a structural diagram of the regulating mechanism in the oil and gas balance system.

[0022] Figure 6 This is a schematic diagram of the actual installation and use of the oil and gas balance system.

[0023] Description of reference numerals:

[0024] 1. Balance box; 2. Air intake mechanism; 3. Fan; 4. First air pipe; 5. Valve; 6. Second air pipe; 7. Third air pipe; 8. Collecting pipe; 9. Collecting tank; 10. Replacement box; 11. Support seat; 12. First gas sensor; 13. Second gas sensor; 14. Telescopic cylinder; 15. First chamber; 16. Screening membrane; 17. Iron block; 18. Second chamber; 19. Adjusting mechanism; 20. Motor; 21. Adjusting rod; 22. First gear; 23. Second gear; 24. Adjusting block; 25. Electromagnet; 26. Oil tank. DETAILED DESCRIPTION

[0025] See also Figures 1 to 4 and Figure 6In an embodiment of the utility model, an oil and gas balance system includes a balance box 1, an air intake mechanism 2 is arranged on the right side surface of the balance box 1, the air intake mechanism 2 includes a fan 3, a first air pipe 4 is installed at the air intake end of the fan 3, a valve 5 is installed at one end of the first air pipe 4, a second air pipe 6 is installed at the air outlet end of the fan 3, one end of the second air pipe 6 is connected to the right side surface of the balance box 1, a third air pipe 7 is connected to the left side surface of the balance box 1, a collecting pipe 8 is connected to the right end of the lower surface of the balance box 1, a collecting tank 9 is installed on the outside of one end of the collecting pipe 8, a replacement box 10 is installed on the front surface of the balance box 1, a support seat 11 is installed on the outside of the lower end of the balance box 1 and the replacement box 10, a first gas sensor 12 and a second gas sensor 13 are symmetrically installed on the left side surface of the lower end of the support seat 11, a first chamber 15 is opened on the right side of the interior of the replacement box 10, and a screening membrane 16 is installed inside the balance box 1 and the first chamber 15.

[0026] In the present application, the entire balancing system is mounted on the upper surface of the (petroleum) oil tank 26 .

[0027] In the present application, the valve 5 is preferably an electric valve, and the valve 5 and the third air pipe 7 are both connected to the inside of the oil tank 26 .

[0028] In the present application, the oil gas and nitrogen mixed gas in the oil tank 26 enters the balance box 1 through the air intake mechanism 2, is screened by the screening membrane 16, and is discharged back to the oil tank 26 through the third air pipe 7.

[0029] In the present application, the screening membrane 16 can allow nitrogen to pass through and block the oil and gas; the screening membrane 16 includes a solid frame and a membrane body installed inside the frame, and the membrane body is any one of a polyimide membrane, a polysulfone membrane, and a ceramic membrane.

[0030] In the present application, the detection ends of the first gas sensor 12 and the second gas sensor 13 are both located inside the oil tank 26; the first gas sensor 12 is a PID sensor for detecting the oil and gas content; the second gas sensor 13 is a nitrogen sensor for detecting the nitrogen content. When the oil and gas content is much greater than the nitrogen content, the valve 5 and the fan 3 are both opened, and screening is performed through the screening membrane 16.

[0031] In the present application, after the temperature of the oil and gas blocked by the screening membrane 16 is lowered, the oil and gas are liquefied and enter the collecting tank 9 through the collecting pipe 8; a condenser can be installed in the collecting tank 9 to accelerate the cooling of the oil and gas.

[0032] In the present application, the exhaust port of the second air pipe 6 is very close to the screening membrane 16, which reduces the nitrogen entering the collecting pipe 8. The nitrogen entering the collecting pipe 8 will be squeezed by the liquefied oil and gas, and thus return to the interior of the oil tank 26 without causing any impact.

[0033] In the present application, the fan 3, the valve 5, the first gas sensor 12 and the second gas sensor 13 are all electrically connected to the external control system, so as to perform automatic start and stop operation.

[0034] exist Figure 1 , Figures 3 to 6 Middle: A telescopic cylinder 14 is installed on the right side surface of the replacement box 10, and the screening membrane 16 inside the balance box 1 moves through the front and rear surfaces of the balance box 1, and an iron block 17 is embedded and installed on the front surface of the screening membrane 16. A second chamber 18 is opened on the left side of the interior of the replacement box 10, and an adjustment mechanism 19 is arranged inside the second chamber 18. The adjustment mechanism 19 includes a motor 20 and an adjustment rod 21. The motor 20 is installed on the lower surface of the interior of the second chamber 18, and the adjustment rod 21 is rotatably connected to the front and rear surfaces of the interior of the second chamber 18. A first gear 22 is installed on the output end of the adjustment rod 21, and a second gear 23 is installed on the outside of the adjustment rod 21. The first gear 22 is meshed and connected to the second gear 23. The outside of the adjustment rod 21 is located at the rear side of the second gear 23 and is threadedly connected with an adjustment block 24. The adjustment block 24 penetrates and is slidably connected to the inner wall between the first chamber 15 and the second chamber 18, and an electromagnet 25 is installed on the right end of the adjustment block 24.

[0035] In the present application, the front and rear surfaces of the screening membrane 16 inside the balancing box 1 are flush with the front and rear surfaces of the balancing box 1 ; an openable box door is provided on the upper surface of the replacement box 10 for adding the screening membrane 16 .

[0036] In the present application, the screening membrane 16 in the first chamber 15 is slidably connected inside the first chamber 15 , and its outer surface is movably fitted with the inner surface of the first chamber 15 ; the front surface of the iron block 17 is flush with the front surface of the screening membrane 16 .

[0037] In the present application, the telescopic cylinder 14 is preferably an electric cylinder, and its telescopic end is in contact with the screening membrane 16 on the far right inside the first chamber 15. Each time it is started, it extends a certain distance, which can drive the screening membrane 16 on the far left inside the first chamber 15 to fit the inner wall between the first chamber 15 and the second chamber 18; at this time, the rear surface of the electromagnet 25 just fits the iron block 17.

[0038] In the present application, a hole is opened on the rear surface of the replacement box 10, which is opposite to the screening membrane 16 and is the same as the front surface of the screening membrane 16; the motor 20 drives the adjusting rod 21 to rotate, which can drive the electromagnet 25 to slide backward, drive the screening membrane 16 inside the first chamber 15 to enter the balance box 1, and squeeze out the screening membrane 16 originally in the balance box 1, so as to automatically replace the screening membrane 16; a box for receiving the fallen screening membrane 16 is installed on the oil tank 26; the telescopic cylinder 14, the electromagnet 25, and the motor 20 are all electrically connected to the external control system, so as to perform automatic start and stop operation.

[0039] The working principle of the utility model is:

[0040] When the first gas sensor 12 and the second gas sensor 13 detect that the oil and gas content in the oil tank 26 is much greater than the nitrogen content, the valve 5 and the fan 3 are opened, and the fan 3 draws the mixed gas in the oil tank 26 into the balance box 1. When the mixed gas passes through the screening membrane 16, the nitrogen passes through, and the oil and gas are blocked. As the temperature decreases, it liquefies and flows into the collection tank 9, thereby reducing the oil and gas content; when the first gas sensor 12 and the second gas sensor 13 detect that the oil and gas content in the oil tank 26 is close to the nitrogen content, the valve 5 and the fan 3 are closed; at regular intervals (when the valve 5 is closed), the electric The magnet 25 is powered off, and the motor 20 drives the adjusting rod 21 to rotate through the first gear 22 and the second gear 23, driving the adjusting block 24 to move forward to the head, and then the telescopic cylinder 14 starts to drive the leftmost screening membrane 16 in the first chamber 15 to move to face the electromagnet 25, and the electromagnet 25 starts to attract the iron block 17 on the screening membrane 16. The motor 20 starts again to drive the adjusting block 24 to move backward, thereby pushing the screening membrane 16 in the balance box 1 out, driving the screening membrane 16 in the first chamber 15 to lift the position of the screening membrane 16 in the balance box 1, thereby completing the replacement of the screening membrane 16.

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil-gas balance system, comprising a balance box (1), an air intake mechanism (2) being arranged on the right side surface of the balance box (1), a third air pipe (7) being connected through the left side surface of the balance box (1), a collecting pipe (8) being connected through the right end of the lower surface of the balance box (1), a collecting tank (9) being installed outside one end of the collecting pipe (8), characterized in that: A replacement box (10) is installed on the front surface of the balancing box (1), a support seat (11) is installed on the outside of the lower ends of the balancing box (1) and the replacement box (10), and a first gas sensor (12) and a second gas sensor (13) are symmetrically installed on the left side surface of the lower end of the support seat (11); A telescopic cylinder (14) is installed on the right side surface of the replacement box (10), and a first chamber (15) is opened on the right side inside the replacement box (10). Screening membranes (16) are installed inside the balance box (1) and the first chamber (15), and an iron block (17) is embedded and installed on the front surface of the screening membrane (16). A second chamber (18) is opened on the left side inside the replacement box (10), and an adjustment mechanism (19) is arranged inside the second chamber (18).

2. The oil and gas balance system according to claim 1, characterized in that: The air intake mechanism (2) comprises a fan (3), a first air pipe (4) is installed at the air intake end of the fan (3), a valve (5) is installed at one end of the first air pipe (4), and a second air pipe (6) is installed at the air outlet end of the fan (3).

3. The oil and gas balance system according to claim 1, characterized in that: The adjusting mechanism (19) comprises a motor (20) and an adjusting rod (21); a first gear (22) is mounted on the output end of the adjusting rod (21); a second gear (23) is mounted on the outside of the adjusting rod (21); an adjusting block (24) is threadedly connected to the outside of the adjusting rod (21) at the rear side of the second gear (23); and an electromagnet (25) is mounted on the right end of the adjusting block (24).

4. The oil-gas balance system according to claim 1, characterized in that: The screening membrane (16) inside the balance box (1) movably penetrates the front and rear surfaces of the balance box (1).

5. The oil and gas balance system according to claim 2, characterized in that: One end of the second air pipe (6) penetrates and is connected to the right side surface of the balance box (1).

6. The oil and gas balance system according to claim 3, characterized in that: The motor (20) is mounted on the inner lower surface of the second chamber (18), the adjustment rod (21) is rotatably connected to the inner front and rear side surfaces of the second chamber (18), the first gear (22) is meshingly connected to the second gear (23), and the adjustment block (24) is slidably connected to the inner wall between the first chamber (15) and the second chamber (18).

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