Carbon dioxide oil displacement tank capable of automatically regulating pressure

Abstract

According to the carbon dioxide oil displacement tank capable of automatically adjusting the pressure, during daily storage, the change speed and amplitude of the pressure in the tank are maximum, so that the stability of equipment can be influenced, an air bag is arranged in a third air cavity, and when the pressure in the third air cavity changes, the air bag is closed, so that the stability of the equipment is improved. The air bag can be matched with the third electric valve and the second electric valve to release or suck air so as to adjust pressure change, the speed and amplitude of the pressure change are slowed down to be within a controllable range, and therefore the stability of air stored in the device is improved, the interior of the tank body is divided into three storage units, and the storage effect is good. The third air cavity, the second air cavity and the first air cavity are sequentially arranged from inside to outside, when the first air cavity leaks, the third air cavity and the second air cavity are in a closed state and do not leak with the first air cavity at the same time, the capacity of the first air cavity is the minimum, the capacity of the third air cavity is the maximum, and if the first air cavity leaks, the loss can be reduced to the minimum. Therefore, the safety of the device can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of oil exploitation, and particularly relates to a tank body for carbon dioxide flooding oil. BACKGROUND

[0002] The commonly used gas storage device for carbon dioxide flooding oil includes a pipe tank body, a spherical tank body, an underground storage tank and a compressed air tank body, etc. The pipe tank body is composed of a series of connected steel pipes, and is filled with high-pressure carbon dioxide gas. The gas storage device has the advantages that the gas storage capacity can be increased by increasing the length and number of the steel pipes, and different specific application requirements can be met by adjusting the shape and size of the tank body.

[0003] During use of the tank body, carbon dioxide in the storage tank may move or leak due to long time or vibration during transportation, which affects the operation efficiency and reliability. In addition, the stability of the tank body is also disturbed by movement loosening or other reasons, thereby causing safety problems such as leakage and explosion. If the tank body leaks, the internal gas will be quickly released, causing resource waste. SUMMARY

[0004] The application provides a tank body for carbon dioxide flooding oil, which can automatically adjust pressure, so as to solve the problem that the stability of the tank body is disturbed by movement loosening or other reasons, thereby causing safety problems such as leakage and explosion.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0006] The application provides a tank body for carbon dioxide flooding oil, which can automatically adjust pressure, so as to solve the problem that the stability of the tank body is disturbed by movement loosening or other reasons, thereby causing safety problems such as leakage and explosion.

[0007] Preferably, the middle part of the tank body is fixedly connected with a cooling shell, one side of the cooling shell is connected with a cold water inlet, the side of the cooling shell away from the cold water inlet is connected with a cold water outlet, the side of the cooling shell close to the first gas cavity is fixedly connected with a first spoiler, and the side of the cooling shell away from the first spoiler is staggered with a plurality of second spoilers.

[0008] Preferably, the cooling shell is externally provided with a temperature sensor near the top end of one side of the cold water outlet, and the detection end of the temperature sensor is located inside the cooling shell through the cooling shell.

[0009] Preferably, the tank body is fixedly installed with a PCL controller near the outer wall of one side of the cold water inlet.

[0010] Preferably, the bottom end of the tank body is fixedly installed with support feet at four corners, the bottom end of the support feet is provided with a movable block, the bottom end of the four movable blocks is movably connected with a fixed seat, the bottom end of the four fixed seats is fixedly connected with a base, and a damping shock absorber is arranged between the four corners of the fixed seat and the movable block.

[0011] Preferably, the two side inner walls of the fixed seat are provided with a sliding groove, and the two side outer walls of the movable block are fixedly connected with a sliding block, and the sliding block and the sliding groove are slidingly connected.

[0012] Preferably, the top end of the support foot is movably installed with a crank handle through a shaft seat, the top end of the movable block is provided with a threaded groove, the output shaft end of the crank handle is fixedly installed with a threaded rod, and the threaded rod and the threaded groove are threadedly connected.

[0013] Preferably, the outer side of the tank body is provided with three pressure sensors, the detection ends of the three pressure sensors are located in the first air cavity, the second air cavity and the third air cavity respectively, the side of the tank body near the pressure sensor is provided with a flow meter, and the detection end of the flow meter passes through the first air cavity, the second air cavity and the third air cavity in sequence.

[0014] Preferably, the top end of the tank body is provided with a first air inlet, a second air inlet and a third air inlet side by side, and the first air inlet, the second air inlet and the third air inlet installed at the top end of the tank body are communicated with the first air cavity, the second air cavity and the third air cavity respectively.

[0015] Preferably, the inner diameters of the first air cavity, the second air cavity and the third air cavity increase from outside to inside in sequence.

[0016] Compared with the prior art, the present application has the following beneficial effects: the present application provides a tank body for carbon dioxide oil displacement which can automatically adjust pressure, the speed and amplitude of pressure change in the tank body are maximum when the tank body is stored daily, which affects the stability of the equipment, the present device is provided with an air bag in the third air cavity, when the pressure in the third air cavity changes, the air bag can cooperate with the third electric valve and the second electric valve to release or inhale gas to adjust the pressure change, so as to slow down the speed and amplitude of pressure change to a controllable range, thereby improving the stability of the gas stored in the device, the inside of the tank body is divided into three storage units, from the inside to the outside, they are the third air cavity, the second air cavity and the first air cavity, when the first air cavity leaks, the third air cavity and the second air cavity are in a closed state and will not leak at the same time with the first air cavity, and the capacity of the first air cavity is the smallest and the capacity of the third air cavity is the largest, if the first air cavity leaks, the loss can also be reduced to the minimum, so that the safety of the device can be improved.

[0017] Further, the present application is provided with a cooling shell outside the middle part of the tank body, the first spoiler and the second spoiler are arranged in the cooling shell in a staggered manner, the cooling shell is provided with a cold water inlet and a cold water outlet outside, cold water is used to circulate in the cooling shell to cool the gas in the first air cavity, and the cooled gas in the first air cavity is sequentially conducted into the second air cavity and the third air cavity, so that the temperature of the three storage units of the tank body can be controlled, and the decline of the stability of the gas due to high temperature can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structure schematic diagram of the tank body for carbon dioxide oil displacement which can automatically adjust pressure.

[0019] Figure 2 It is an installation schematic diagram of the inside of the tank body for carbon dioxide oil displacement which can automatically adjust pressure.

[0020] Figure 3 It is a structure schematic diagram of the bottom of the tank body for carbon dioxide oil displacement which can automatically adjust pressure.

[0021] Figure 4 It is a structure schematic diagram of the cooling shell for carbon dioxide oil displacement which can automatically adjust pressure.

[0022] Figure 5 It is an overall structure schematic diagram of the tank body for carbon dioxide oil displacement which can automatically adjust pressure. Figure 1

[0023] Figure 6 It is an enlarged schematic diagram of position A in the tank body for carbon dioxide oil displacement which can automatically adjust pressure. Figure 2

[0024] It is an enlarged schematic diagram of position B in the tank body for carbon dioxide oil displacement which can automatically adjust pressure.​Figure 7 A tank body for carbon dioxide oil displacement with automatic pressure regulation Figure 4 An enlarged schematic view at C in the figure.

[0025] In the figure: 1, tank body; 2, third air cavity; 3, second air cavity; 4, first air cavity; 5, air outlet; 6, exhaust pipe; 7, first exhaust port; 8, second exhaust port; 9, third exhaust port; 10, communication pipe; 11, main exhaust port; 12, first electric valve; 13, air bag; 14, inner pipe; 15, air supply pipe; 16, pump interface; 17, third electric valve; 18, second electric valve; 19, cooling shell; 20, cold water inlet; 21, cold water outlet; 22, first spoiler; 23, second spoiler; 24, support foot; 25, movable block; 26, fixed seat; 27, base; 28, damping shock absorber; 29, sliding chute; 30, sliding block; 31, crank; 32, threaded groove; 33, threaded rod; 34, pressure sensor; 35, temperature sensor; 36, PCL controller; 37, flow meter; 38, first air inlet; 39, second air inlet; 40, third air inlet. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product of the present application when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0033] Please refer to Figures 1-7The application provides a tank body for carbon dioxide oil displacement, which can automatically adjust pressure, and comprises a tank body 1, a third air cavity 2 is arranged in the tank body 1, a second air cavity 3 is arranged outside the third air cavity 2 of the tank body 1, a first air cavity 4 is arranged outside the second air cavity 3 of the tank body 1, air outlets 5 are arranged at the bottom of one side of the first air cavity 4, the second air cavity 3 and the third air cavity 2, exhaust pipes 6 are fixedly installed at one end outside the tank body 1 of the three air outlets 5, first exhaust ports 7, second exhaust ports 8 and third exhaust ports 9 are respectively connected to the ends, away from the tank body 1, of the three exhaust pipes 6, the first exhaust ports 7, the second exhaust ports 8 and the third exhaust ports 9 are communicated through a communication pipe 10, a main exhaust port 11 is arranged in the middle of the communication pipe 10, first electric valves 12 are arranged in the middle of the first exhaust ports 7, the second exhaust ports 8 and the third exhaust ports 9, the inner diameters of the first air cavity 4, the second air cavity 3 and the third air cavity 2 gradually increase from outside to inside, the inside of the tank body 1 is divided into three storage units, which are the third air cavity 2, the second air cavity 3 and the first air cavity 4 from inside to outside, when the first air cavity 4 leaks, the third air cavity 2 and the second air cavity 3 are in a closed state and cannot leak at the same time as the first air cavity 4, the capacity of the first air cavity 4 is the smallest, the capacity of the third air cavity 2 is the largest, if the first air cavity 4 leaks, the loss can also be reduced to the minimum, and therefore the safety of the device can be improved.

[0034] As Figure 2 and Figure 6As shown, another embodiment of the application provides an automatic pressure regulating tank for carbon dioxide oil displacement, comprising a tank 1, a first gas cavity 4, a second gas cavity 3 and a third gas cavity 2 are sequentially arranged in the tank 1, a gas outlet 5 is arranged at the bottom end of one side of the first gas cavity 4, the second gas cavity 3 and the third gas cavity 2, three gas outlets 5 are connected with exhaust pipes 6, the first exhaust pipe 7, the second exhaust pipe 8 and the third exhaust pipe 9 are respectively connected with the three exhaust pipes 6, the first electric valve 12 is arranged on the first exhaust pipe 7, the second exhaust pipe 8 and the third exhaust pipe 9, the air bag 13 is arranged in the third gas cavity 2, the two ends of the air bag 13 are communicated with the inner tubes 14, the gas supply pipe 15 is connected with the two inner tubes 14, the pump interface 16 is connected with the middle part of the gas supply pipe 15, the third electric valve 17 is communicated with one side of the pump interface 16, the second electric valve 18 is connected with the other side of the pump interface 16, the air bag 13 is arranged in the third gas cavity 2 of the tank 1, the two ends of the air bag 13 are communicated with the inner tubes 14, the bottom end of the two inner tubes 14 passes through the tank 1 and is communicated with the gas supply pipe 15, the pump interface 16 is connected with the middle part of the gas supply pipe 15 through the three-way pipe, the third electric valve 17 is communicated with the left side of the gas supply pipe 15 close to the pump interface 16, the second electric valve 18 is communicated with the right side of the gas supply pipe 15 close to the pump interface 16, three pressure sensors 34 are arranged side by side on one side of the tank 1, the detection ends of the three pressure sensors 34 are respectively located in the first gas cavity 4, the second gas cavity 3 and the third gas cavity 2, because the capacity of the third gas cavity 2 is the largest, the pressure change speed and amplitude in it are the largest during daily storage, which will affect the stability of the equipment, the air bag 13 is arranged in the third gas cavity 2, when the pressure in the third gas cavity 2 changes, the air bag 13 can cooperate with the third electric valve 17 and the second electric valve 18 to release or inhale gas to adjust the pressure change, so as to slow down the rate and amplitude of pressure change to a controllable range, thereby improving the stability of the stored gas in the device;

[0035] As Figure 4As shown, another embodiment of the present application provides an automatic pressure regulating tank for carbon dioxide oil displacement, comprising a tank 1, a first air cavity 4, a second air cavity 3 and a third air cavity 2 are sequentially arranged inside the tank 1, a gas outlet 5 is arranged at the bottom end of one side of the first air cavity 4, the second air cavity 3 and the third air cavity 2, three gas discharge pipes 6 are connected to the three gas outlets 5, a first gas outlet 7, a second gas outlet 8 and a third gas outlet 9 are respectively connected to the three gas discharge pipes 6, a first electric valve 12 is arranged on the first gas outlet 7, the second gas outlet 8 and the third gas outlet 9, an air bag 13 is arranged inside the third air cavity 2, two inner tubes 14 are communicated at both ends of the air bag 13, a gas supply pipe 15 is connected to the two inner tubes 14, a pump interface 16 is connected to the middle part of the gas supply pipe 15, a third electric valve 17 is communicated at one side of the pump interface 16, a second electric valve 18 is connected to the other side of the pump interface 16, a cooling shell 19 is fixedly connected to the middle outer side of the tank 1, a cold water inlet 20 is communicated at one side of the cooling shell 19, a cold water outlet 21 is communicated at the side of the cooling shell 19 away from the cold water inlet 20, a plurality of first spoiler plates 22 are fixedly connected to the inner wall of the side of the cooling shell 19 close to the first air cavity 4, a plurality of second spoiler plates 23 are staggered arranged at the side of the cooling shell 19 away from the first spoiler plates 22, a temperature sensor 35 is arranged at the top end of the outside of the side of the cooling shell 19 close to the cold water outlet 21, the detection end of the temperature sensor 35 passes through the cooling shell 19 and is located inside the cooling shell 19, because high temperature can cause the pressure of carbon dioxide gas in the tank 1 to increase, thereby affecting the stability, the present device is installed with a cooling shell 19 at the middle outer side of the tank 1, the first spoiler plates 22 and the second spoiler plates 23 are staggered arranged inside the cooling shell 19, the cold water inlet 20 and the cold water outlet 21 are respectively arranged outside the cooling shell 19, cold water is used to circulate in the cooling shell 19 to cool the gas in the first air cavity 4, the cooled gas in the first air cavity 4 is sequentially conducted into the second air cavity 3 and the third air cavity 2, in this way, the temperature of the three storage units of the tank 1 can be controlled, and the decline of gas stability caused by high temperature can be avoided.

[0036] As Figure 1 and Figure 5As shown, another embodiment of the present application provides an automatic pressure regulating carbon dioxide oil displacement tank, comprising a tank 1, a first gas cavity 4, a second gas cavity 3 and a third gas cavity 2 are sequentially arranged inside the tank 1, a gas outlet 5 is arranged at the bottom end of one side of the first gas cavity 4, the second gas cavity 3 and the third gas cavity 2, three gas outlets 5 are connected with exhaust pipes 6, the first exhaust port 7, the second exhaust port 8 and the third exhaust port 9 are respectively connected with three exhaust pipes 6, the first electric valve 12 is arranged on the first exhaust port 7, the second exhaust port 8 and the third exhaust port 9, the gas bag 13 is arranged in the third gas cavity 2, the inner tube 14 is communicated at both ends of the gas bag 13, the gas supply pipe 15 is connected with the two inner tubes 14, the pump interface 16 is connected at the middle part of the gas supply pipe 15, the third electric valve 17 is communicated at one side of the pump interface 16, the second electric valve 18 is connected at the other side of the pump interface 16, the supporting legs 24 are fixedly installed at the bottom end of the tank 1, the movable blocks 25 are arranged at the bottom end of the four corner supporting legs 24, the fixed seats 26 are movably connected at the bottom end of the four movable blocks 25, the bases 27 are fixedly connected at the bottom end of the four fixed seats 26, the damping shock absorbers 28 are arranged between the four corners of the fixed seat 26 and the movable block 25, the sliding grooves 29 are formed in the inner walls of the two sides of the fixed seat 26, the sliding blocks 30 are fixedly connected with the outer walls of the two sides of the movable block 25, the sliding blocks 30 are slidably connected with the sliding grooves 29, the crank handle 31 is movably installed at the top end of the supporting leg 24 through the shaft seat, the threaded groove 32 is formed at the top end of the movable block 25, the threaded rod 33 is fixedly installed at the output shaft end of the crank handle 31, the threaded rod 33 is threadedly connected with the threaded groove 32, when the tank 1 is installed, first use the suspension machinery to transfer the base 27 to the specified position, and then install the tank 1 on the top end of the base 27 through the suspension machinery, when installing, the four supporting legs 24 at the bottom end of the tank 1 are overlapped on the four movable blocks 25, then the crank handle 31 is shaken, the crank handle 31 controls the threaded rod 33 to be fixed in the threaded groove 32 to connect the supporting leg 24 and the movable block 25, when used daily, the damping shock absorbers 28 installed at the four corners of the movable block 25 and the fixed seat 26 can play the purpose of buffering and damping, avoiding the influence of external vibration on the stability of the equipment;

[0037] As Figure 2As shown in the figure, another embodiment of the present application provides an automatic pressure regulating carbon dioxide oil displacement tank, which comprises a tank 1, a first air cavity 4, a second air cavity 3 and a third air cavity 2 are sequentially arranged in the tank 1, a gas outlet 5 is arranged at the bottom end of one side of the first air cavity 4, the second air cavity 3 and the third air cavity 2, three exhaust pipes 6 are connected to the three gas outlets 5, a first exhaust port 7, a second exhaust port 8 and a third exhaust port 9 are respectively connected to the three exhaust pipes 6, a first electric valve 12 is arranged on the first exhaust port 7, the second exhaust port 8 and the third exhaust port 9, an air bag 13 is arranged in the third air cavity 2, two inner tubes 14 are connected to the two ends of the air bag 13, a gas supply pipe 15 is connected to the two inner tubes 14, a pump interface 16 is connected to the middle of the gas supply pipe 15, a third electric valve 17 is connected to one side of the pump interface 16, a second electric valve 18 is connected to the other side of the pump interface 16, a PCL controller 36 is fixedly installed on the outer wall of one side of the tank 1 close to the cold water inlet 20, the PCL controller 36 is electrically connected with a temperature sensor 35 and a pressure sensor 34, the pressure sensor 34 and the temperature sensor 35 are connected with the PCL controller 36, and the PCL controller 36 is connected with an externally configured pressure pump and a conveying pipeline, so that automatic control can be realized according to the signals of the pressure sensor 34 and the temperature sensor 35.

[0038] As Figure 1 As shown in the figure, another embodiment of the present application provides an automatic pressure regulating carbon dioxide oil displacement tank, which comprises a tank 1, a first air cavity 4, a second air cavity 3 and a third air cavity 2 are sequentially arranged in the tank 1, a gas outlet 5 is arranged at the bottom end of one side of the first air cavity 4, the second air cavity 3 and the third air cavity 2, three exhaust pipes 6 are connected to the three gas outlets 5, a first exhaust port 7, a second exhaust port 8 and a third exhaust port 9 are respectively connected to the three exhaust pipes 6, a first electric valve 12 is arranged on the first exhaust port 7, the second exhaust port 8 and the third exhaust port 9, an air bag 13 is arranged in the third air cavity 2, two inner tubes 14 are connected to the two ends of the air bag 13, a gas supply pipe 15 is connected to the two inner tubes 14, a pump interface 16 is connected to the middle of the gas supply pipe 15, a third electric valve 17 is connected to one side of the pump interface 16, a second electric valve 18 is connected to the other side of the pump interface 16, a PCL controller 36 is fixedly installed on the outer wall of one side of the tank 1 close to the cold water inlet 20, the PCL controller 36 is electrically connected with a temperature sensor 35 and a pressure sensor 34, the pressure sensor 34 and the temperature sensor 35 are connected with the PCL controller 36, and the PCL controller 36 is connected with an externally configured pressure pump and a conveying pipeline, so that automatic control can be realized according to the signals of the pressure sensor 34 and the temperature sensor 35.

[0039] Working principle: when installing, first use the suspension machinery to transport the base 27 to the designated position, and then install the tank body 1 at the top end of the base 27 through the suspension machinery, when installing, overlap the four supporting feet 24 at the bottom end of the tank body 1 on the four movable blocks 25, then shake the handle 31, the handle 31 controls the threaded rod 33 fixed in the threaded groove 32 to connect the supporting feet 24 and the movable blocks 25, the device divides the inside of the tank body 1 into three storage units, from inside to outside, they are the third air cavity 2, the second air cavity 3 and the first air cavity 4, when the first air cavity 4 leaks, the third air cavity 2 and the second air cavity 3 are in a closed state and will not leak at the same time as the first air cavity 4, and the capacity of the first air cavity 4 is the smallest, and the capacity of the third air cavity 2 is the largest, if the first air cavity 4 leaks, the loss can also be minimized, because the capacity of the third air cavity 2 is the largest, the pressure change speed and amplitude inside it are the largest during daily storage, which will affect the stability of the equipment, the device sets the air bag 13 inside the third air cavity 2, when the pressure in the third air cavity 2 changes, the air bag 13 can cooperate with the third electric valve 17 and the second electric valve 18 to release or inhale gas to adjust the pressure change, slow down the rate and amplitude of the pressure change to a controllable range, because high temperature will cause the pressure of the carbon dioxide gas in the tank body 1 to increase, thereby affecting the stability, the device installs the cooling shell 19 on the outside of the middle part of the tank body 1, the first baffle plate 22 and the second baffle plate 23 are arranged in the cooling shell 19, the cooling shell 19 is provided with a cold water inlet 20 and a cold water outlet 21, and cold water is circulated in the cooling shell 19 to cool the gas in the first air cavity 4, and the cooled gas in the first air cavity 4 is sequentially conducted into the second air cavity 3 and the third air cavity 2, so that the temperature of the three storage units of the tank body 1 can be controlled.

[0040] Although the embodiments of the present application are described above in combination with the drawings, the present application is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and guiding, but not limiting. Those skilled in the art can make many forms under the guidance of the specification without departing from the scope protected by the claims of the present application, which are all included in the protection of the present application.

Claims

1. A carbon dioxide flooding tank with automatic pressure regulation, characterized in that, Includes a tank (1), inside which are arranged a first air chamber (4), a second air chamber (3), and a third air chamber (2) in sequence. Each of the first air chamber (4), the second air chamber (3), and the third air chamber (2) has an air outlet (5) at one bottom end. Each of the three air outlets (5) is connected to an exhaust pipe (6), which is respectively connected to a first exhaust port (7), a second exhaust port (8), and a third exhaust port (9). 8) and the third exhaust port (9) are both equipped with a first electric valve (12). An air bag (13) is provided inside the third air chamber (2). Both ends of the air bag (13) are connected to an inner tube (14). An air supply pipe (15) is connected to the two inner tubes (14). A pump interface (16) is connected to the middle of the air supply pipe (15). A third electric valve (17) is connected to one side of the pump interface (16). A second electric valve (18) is connected to the other side of the pump interface (16).

2. The carbon dioxide flooding tank with automatic pressure regulation according to claim 1, characterized in that, A cooling shell (19) is fixedly connected to the outer side of the middle part of the tank (1). A cold water inlet (20) is connected to one side of the cooling shell (19). A cold water outlet (21) is connected to the side of the cooling shell (19) away from the cold water inlet (20). A first baffle (22) is fixedly connected to the inner wall of the cooling shell (19) near the first air chamber (4). A plurality of second baffles (23) are staggered on the side of the cooling shell (19) away from the first baffle (22).

3. The carbon dioxide flooding tank with automatic pressure regulation according to claim 2, characterized in that, A temperature sensor (35) is provided on the top of the cooling housing (19) near the cold water outlet (21). The detection end of the temperature sensor (35) passes through the cooling housing (19) and is located inside the cooling housing (19).

4. The carbon dioxide flooding tank with automatic pressure regulation according to claim 3, characterized in that, A PCL controller (36) is fixedly installed on the outer wall of the tank (1) near the cold water inlet (20).

5. A carbon dioxide flooding tank with automatic pressure regulation according to claim 1, characterized in that, Support feet (24) are fixedly installed at the four corners of the bottom of the tank (1). Movable blocks (25) are provided at the bottom of each support foot (24). Fixed seats (26) are movably connected to the bottom of each of the four movable blocks (25). Bases (27) are fixedly connected to the bottom of each of the four fixed seats (26). Damping shock absorbers (28) are provided between the fixed seats (26) and the four corners of the movable blocks (25).

6. A carbon dioxide flooding tank with automatic pressure regulation according to claim 2, characterized in that, The fixed base (26) has sliding grooves (29) on both inner walls, and the movable block (25) has sliders (30) fixedly connected to both outer walls, and the sliders (30) are slidably connected to the sliding grooves (29).

7. A carbon dioxide flooding tank with automatic pressure regulation according to claim 4, characterized in that, A crank handle (31) is movably mounted on the top of the support foot (24) via a bearing seat. A threaded groove (32) is provided on the top of the movable block (25). A threaded rod (33) is fixedly mounted on the output shaft end of the crank handle (31). The threaded rod (33) is threadedly connected to the threaded groove (32).

8. The carbon dioxide flooding tank with automatic pressure regulation according to claim 1, characterized in that, Three pressure sensors (34) are provided on the outer side of the tank (1). The detection ends of the three pressure sensors (34) are located in the first air chamber (4), the second air chamber (3) and the third air chamber (2) respectively. A flow meter (37) is provided on the side of the tank (1) near the pressure sensors (34). The detection end of the flow meter (37) passes through the first air chamber (4), the second air chamber (3) and the third air chamber (2) in sequence.

9. A carbon dioxide flooding tank with automatic pressure regulation according to claim 1, characterized in that, The top of the tank (1) is provided with a first gas inlet (38), a second gas inlet (39) and a third gas inlet (40) arranged side by side. The first gas inlet (38), the second gas inlet (39) and the third gas inlet (40) installed on the top of the tank (1) are respectively connected to the first gas chamber (4), the second gas chamber (3) and the third gas chamber (2).

10. A carbon dioxide flooding tank with automatic pressure regulation according to claim 1, characterized in that, The inner diameters of the first air chamber (4), the second air chamber (3), and the third air chamber (2) increase sequentially from the outside to the inside.

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