A crude oil metering device

Abstract

The present invention relates to the technical field of crude oil metering devices, and specifically, to a crude oil metering device. The problem of inaccurate water content test results of crude oil metering devices in the prior art is solved, and the practicability of the equipment is improved. Its structure includes a fixed frame, a cyclone and a regulating box are fixed on the fixed frame, a first connecting pipe is provided on the top of the cyclone, a second connecting pipe is provided on the bottom of the cyclone, a liquid storage chamber is provided on the lower side of the regulating box, an air storage chamber is provided on the upper side of the regulating box, the liquid storage chamber is connected to the second connecting pipe, the air storage chamber is connected to the first connecting pipe, a first air outlet pipe is also provided on the side wall of the air storage chamber, and a first liquid outlet pipe is provided on the side wall of the liquid storage chamber. This embodiment replaces the design of directly setting a water content tester at the liquid outlet end of the cyclone in the prior art. The present invention ensures that the discharge of natural gas and crude oil remains balanced, so that the natural gas content in the oil discharged from the cyclone is lower, the water content test result is more accurate, and it has strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of crude oil metering devices, and in particular to a crude oil metering device. Background Art

[0002] Crude oil metering device is a device used to accurately measure crude oil flow, volume, quality and other related parameters. Usually, it includes components such as flow meter and water content meter. Crude oil metering device can integrate various data and accurately calculate the quantity and quality of crude oil.

[0003] Crude oil contains a large amount of natural gas, and the presence of this natural gas may change the optical or electrical properties of crude oil, affecting the accuracy of the test of the water content of crude oil. In order to more accurately test the water content of crude oil, the existing crude oil metering device first separates the crude oil into gas and liquid through a cyclone before testing the water content, so as to reduce the impact of natural gas in the crude oil on the test of the water content of crude oil.

[0004] Although this can improve the accuracy of the original water content test, the following problems still exist: due to the different natural gas content in different types of crude oil, if the original discharge volume is maintained to separate the petroleum liquid and natural gas, the amount of natural gas and crude oil discharged per unit time will be different. After a long time, due to the excessively high concentration of natural gas in the cyclone, it may hinder the separation of natural gas from crude oil, thereby increasing the content of natural gas in the discharged petroleum liquid and affecting the detection result of the water content of crude oil. Summary of the invention

[0005] The present invention provides a crude oil metering device, which solves the problem of inaccurate water content test results of crude oil metering devices in the prior art and improves the practicability of the equipment.

[0006] The technical solution of the present invention is as follows:

[0007] A crude oil metering device comprises a fixing frame,

[0008] A cyclone and a regulating box are fixed on the fixed frame, a first connecting pipe is provided on the top of the cyclone, a second connecting pipe is provided on the bottom of the cyclone, a liquid storage chamber is provided on the lower inner side of the regulating box, an air storage chamber is provided on the upper inner side of the regulating box, the liquid storage chamber is connected to the second connecting pipe, the air storage chamber is connected to the first connecting pipe, a first air outlet pipe is also provided on the side wall of the air storage chamber, a first liquid outlet pipe is provided on the side wall of the liquid storage chamber, a balancing structure for maintaining pressure balance between the liquid storage chamber and the air storage chamber is provided between the first air outlet pipe and the first liquid outlet pipe, an adjusting structure for controlling and adjusting the balancing structure is also provided in the regulating box, a gas flow meter is provided on the first air outlet pipe, and a liquid flow meter is provided on the first liquid outlet pipe The meter and moisture content tester, the balance structure includes a first balance box and a second balance box, the first balance box is fixedly arranged in the air storage chamber, the first balance box is connected to the first air outlet pipe, the second balance box is fixedly arranged in the liquid storage chamber, the second balance box is connected to the first liquid outlet pipe, a partition is provided between the liquid storage chamber and the air storage chamber, an adjusting member is slidably connected to the partition, the adjusting member is slidably connected to the first balance box and the second balance box at the same time, the adjusting member includes a float, a sliding hole is provided on the partition, the float is slidably connected to the sliding hole, a connecting rod is fixed on the float, and limit disks are fixed at both ends of the connecting rod, and the adjusting structure includes abutting members, and the abutting members abut against the limit disk.

[0009] Furthermore, the first balance box is provided with a plurality of air inlet holes, and the second balance box is provided with a plurality of liquid inlet holes, and the liquid inlet holes and the air inlet holes are arranged in the movement stroke of the adjusting member.

[0010] Furthermore, the first balance box is a cylindrical structure, an air guide cavity is provided in the first balance box, the number of the air inlet holes is two, and they are respectively arranged at the top and bottom of the first balance box, a plurality of first support rods are fixed between the first balance box and the air storage cavity, and the first balance box and the second balance box have the same structure.

[0011] Furthermore, a first blocking piece is fixed on the upper side of the connecting rod, a second blocking piece is fixed on the lower side of the connecting rod, the float is a cylindrical structure, and a first limit plate and a second limit plate are fixed on the upper and lower ends of the float respectively, and the first limit plate and the second limit plate are both disc-shaped structures.

[0012] Furthermore, the first sealing part includes a first sealing portion and a second sealing portion, both of which are truncated cone structures, and sealing layers are fixed to the outside of the first sealing portion and the second sealing portion, and the sealing layers are made of rubber material. The first sealing portion is arranged in the first balancing box, and the second sealing portion is arranged outside the first sealing box, and the second sealing part and the first sealing part have the same structure.

[0013] Furthermore, a screw rod is rotatably connected in the air storage chamber, a sliding rod is fixed in the air storage chamber, the screw rod and the sliding rod are parallel to each other, the abutment is threadedly connected to the screw rod, and the abutment is slidably connected to the sliding rod.

[0014] Furthermore, the abutment member includes an abutment plate and a sliding plate, the sliding plate is threadedly connected to the screw rod, the sliding plate is slidingly connected to the sliding rod, a plurality of sliding columns are fixed to the lower end of the sliding plate, the sliding columns are slidingly connected to the abutment plate, a limiting spring is sleeved on the sliding column, the two ends of the limiting spring are respectively fixedly connected to the abutment plate and the sliding plate, and the sliding column is fixed with a limiting bolt away from the end of the sliding plate.

[0015] Furthermore, a motor cavity is provided at the top of the liquid storage cavity, a driving motor is fixed in the motor box, and an output shaft of the driving motor is fixedly connected to the screw rod.

[0016] Furthermore, the cyclone includes a first guide part and a second guide part, the first guide part is a cylindrical structure, the second guide part is a truncated cone structure, the first guide part is arranged above the second guide part, a second air outlet pipe is provided on the top of the first guide part, a second liquid outlet pipe is provided at the bottom of the second guide part, a liquid inlet pipe is provided on the side wall of the first guide part, a water pump is fixed on the second liquid outlet pipe, the first connecting pipe is fixed to the second air outlet pipe by a threaded connection, and the second connecting pipe is connected to the water pump.

[0017] Furthermore, a third limit plate is provided in the air storage cavity, the connecting rod is slidably connected to the third limit plate, and a plurality of second support rods are fixed to the third limit plate and the inner wall of the air storage cavity.

[0018] The working principle and beneficial effects of the present invention are:

[0019] The working process of this embodiment is as follows: when it is necessary to test the liquid water content of crude oil, the crude oil is first introduced into the cyclone, and the natural gas in the crude oil is separated from the oil by centrifugal force. The obtained natural gas enters the gas storage cavity through the second gas outlet pipe and the first connecting pipe, and the obtained oil enters the liquid storage cavity through the second liquid storage pipe and the second connecting pipe. At this time, if the natural gas entering the gas storage cavity is more than the oil in the liquid storage cavity, then under the action of air pressure, the float moves downward, and the first sealing part and the second sealing part seal the second balance box and open the first balance box, so that more natural gas will be discharged; if the natural gas entering the gas storage cavity is less than the oil in the liquid storage cavity, the liquid level of the liquid storage cavity rises, driving the float to rise, and the first sealing part and the second sealing part seal the first balance box and open the second balance box, so that more oil will be discharged.

[0020] The present invention arranges a cyclone and a regulating box on a fixed frame, and controls the amount of gas discharged from the cyclone to the liquid storage chamber and the gas storage chamber through a balancing structure, replacing the design of directly arranging a water content tester at the liquid outlet of the cyclone in the prior art. The present invention ensures that the discharge amounts of natural gas and crude oil remain balanced, so that the natural gas content in the oil discharged from the cyclone is lower, the water content test result is more accurate, and the invention has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a structural schematic diagram of the prior art;

[0023] Figure 2 Schematic diagram of the overall structure of this embodiment;

[0024] Figure 3 The internal structure of the regulating box in this embodiment is shown in FIG. Figure 1 ;

[0025] Figure 4 The internal structure of the regulating box in this embodiment is shown in FIG. Figure 2 ;

[0026] Figure 5 The internal structure of the regulating box in this embodiment is shown in FIG. Figure 3 ;

[0027] Figure 6 It is a schematic diagram of the internal connection structure between the adjusting member and the first balancing box in this embodiment;

[0028] Figure 7 Schematic diagram of the connection structure between the abutment member and the limiting plate in this embodiment;

[0029] Figure 8 It is a schematic diagram of the internal connection structure between the adjusting member and the second balancing box in this embodiment.

[0030] In the figure:

[0031] 1. Cyclone; 11. First flow guide; 12. Second flow guide; 13. Liquid inlet pipe; 14. Second air outlet pipe; 15. Second liquid outlet pipe; 2. Water pump; 31. First connecting pipe; 32. Second connecting pipe; 4. Fixing frame; 5. Adjusting box; 51. Gas storage chamber; 52. Liquid storage chamber; 53. First air outlet pipe; 531. Gas flow meter; 54. First liquid outlet pipe; 541. Liquid flow meter; 542. Water content tester; 55. Motor chamber; 56. Partition; 561. Sliding hole; 61. Screw rod; 62. Sliding rod; 71. First balance box ;72. Second balance box;711. First support rod;712. Air inlet;721. Liquid inlet;713. Air guide cavity;8. Adjusting member;81. Float;82. First limit plate;83. Second limit plate;84. Connecting rod;85. First blocking member;851. First blocking part;852. Second blocking part;86. Second blocking member;87. Limiting disk;88. Third limit plate;881. Second support rod;9. Abutting member;91. Abutting plate;92. Sliding column;921. Limiting spring;93. Limiting bolt;94. Sliding plate. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 2~Figure 8 As shown, this embodiment provides a crude oil metering device, the structure of which includes a fixing frame 4.

[0034] The cyclone 1 and the regulating box 5 in this embodiment are fixedly arranged on the fixed frame 4, the first connecting pipe 31 is arranged on the top of the cyclone 1, the second connecting pipe 32 is arranged on the bottom of the cyclone 1, the liquid storage chamber 52 is arranged on the lower side of the regulating box 5, the gas storage chamber 51 is arranged on the upper side of the regulating box 5, the liquid storage chamber 52 is connected to the second connecting pipe 32, the gas storage chamber 51 is connected to the first connecting pipe 31, the first gas outlet pipe 53 is arranged on the side wall of the gas storage chamber 51, and the first liquid outlet pipe 54 is arranged on the side wall of the liquid storage chamber 52. The balance structure is arranged between the first gas outlet pipe 53 and the first liquid outlet pipe 54 to maintain the pressure balance between the liquid storage chamber 52 and the gas storage chamber 51. The regulating structure is arranged in the regulating box 5 to control and adjust the balance structure. The gas flowmeter 531 is arranged on the first gas outlet pipe 53, and the liquid flowmeter 541 and the water content tester 542 are arranged on the first liquid outlet pipe 54. This embodiment ensures that the petroleum liquid and natural gas contents in the cyclone 1 are balanced through a balancing structure, and the petroleum liquid in the cyclone 1 will not cause the natural gas to be re-integrated into the petroleum liquid due to the high natural gas content in the cyclone 1. The water content and flow rate measurement are more accurate and reliable.

[0035] The balancing structure in this embodiment includes a first balancing box 71 and a second balancing box 72. The first balancing box 71 is fixedly arranged in the air storage chamber 51 and connected to the first air outlet pipe 53. The second balancing box 72 is fixedly arranged in the liquid storage chamber 52 and connected to the first liquid outlet pipe 54. The partition 56 is arranged between the liquid storage chamber 52 and the air storage chamber 51 to separate the liquid storage chamber 52 from the air storage chamber 51. The adjusting member 8 is slidably arranged on the partition 56. The adjusting member 8 is slidably connected to the first balancing box 71 and the second balancing box 72 at the same time. A plurality of air inlet holes 712 are arranged on the first balancing box 71, and a plurality of liquid inlet holes 721 are arranged on the second balancing box 72. The liquid inlet holes 721 and the air inlet holes 712 are arranged in the movement stroke of the adjusting member 8. Such a design enables the liquid and air intake of the first balancing box 71 and the second balancing box 72 to be controlled by the movement of the adjusting member 8. When the petroleum liquid in the liquid storage chamber 52 increases, the regulating member 8 moves up to close the first balance box 71, the natural gas in the regulating box 5 cannot be discharged, and the petroleum liquid is discharged normally; on the contrary, when the natural gas content in the gas storage chamber 51 increases, the regulating member 8 moves down, the first balance box 71 is opened, the natural gas in the regulating box 5 is discharged normally, and the petroleum liquid cannot be discharged. The balanced discharge of petroleum liquid and natural gas is ensured. In this embodiment, the regulating box 5 is divided into a liquid storage chamber 52 and a gas storage chamber 51, wherein the liquid storage chamber 52 is used to store petroleum liquid, and the gas storage chamber 51 is used to store natural gas. It is ensured that the natural gas and petroleum liquid entering the regulating box 5 remain separated and will not re-merge.

[0036] The first balance box 71 in this embodiment is a cylindrical structure, the air guide cavity is arranged in the first balance box 71, and the number of air inlet holes 712 is two, which are respectively arranged at the top and the bottom of the first balance box 71. A plurality of first support rods 711 are fixedly arranged between the first balance box 71 and the air storage cavity 51, and are used to connect and support the first balance box 71 to ensure that the first balance box 71 is suspended in the air storage cavity 51. The first balance box 71 and the second balance box 72 have the same structure.

[0037] The regulating member 8 in this embodiment includes a float 81, a sliding hole 561 is arranged on the partition 56, the float 81 is slidingly connected with the sliding hole 561, a connecting rod 84 is fixedly arranged on the float 81, a first blocking member 85 is fixedly arranged on the upper side of the connecting rod 84, and a second blocking member 86 is fixedly arranged on the lower side of the connecting rod 84. The float 81 is a cylindrical structure, which is used to ensure that the float 81 will not be skewed or deviated during the process of moving up or down. The first limiting plate 82 and the second limiting plate 83 are fixedly arranged at the upper and lower ends of the float 81 to prevent the float 81 from detaching from the partition 56 when the petroleum liquid in the liquid storage chamber 52 is emptied or filled. The first limiting plate 82 and the second limiting plate 83 are both disc-shaped structures. The first blocking member 85 and the second blocking member 86 in this embodiment are used to block the air inlet 712 in the first balance box 71 and the second balance box 72. When the first blocking member 85 moves close to the first balancing box 71, the first blocking member 85 blocks the air inlet 712 in the first balancing box 71, and when the first blocking member 85 moves away from the first balancing box 71, the first blocking member 85 opens the air inlet 712 at the top of the first balancing box 71, so that the natural gas in the gas storage chamber 51 can smoothly enter the first balancing box 71 and be discharged from the first gas outlet pipe 53. The second blocking member 86 in this embodiment is connected to the second balancing box 72 in the same manner.

[0038] The first blocking member 85 in this embodiment includes a first blocking portion 851 and a second blocking portion 852, both of which are truncated cone structures. The sealing layer is fixedly arranged outside the first blocking portion 851 and the second blocking portion 852, and the sealing layer is made of rubber material to reduce the collision of the first blocking portion 851 and the second blocking portion 852 with the air inlet 712 in the first balance box 71. The limit plate is fixedly arranged at both ends of the connecting rod 84 to prevent the float 81 on the connecting rod 84 from detaching from the partition 56. The first blocking portion 851 is arranged in the first balance box 71, and the second blocking portion 852 is arranged outside the first blocking box. The second blocking member 86 has the same structure as the first blocking member 85.

[0039] The adjustment structure in this embodiment includes an abutment 9, a screw rod 61 rotatably disposed in the air storage chamber 51, a sliding rod 62 fixedly disposed in the air storage chamber 51, the screw rod 61 and the sliding rod 62 are parallel to each other, the abutment 9 is threadedly connected to the screw rod 61, the abutment 9 is slidingly connected to the sliding rod 62, and the abutment 9 abuts against the limit plate. Since the natural gas content and the oil content in different crude oils are different, the float 81 of the same weight is difficult to adapt to the balance requirements of different crude oils. Therefore, the screw rod 61 is set to control the abutment 9 to abut the float 81, so as to increase the oil content of the oil storage chamber required for the float 81 to move up. Since the rotation stroke of the screw rod 61 is much greater than the movement stroke of the abutment 9, it is more accurate and controllable to control the movement of the abutment 9 through the screw rod 61.

[0040] The abutment member 9 in this embodiment includes an abutment plate 91 and a sliding plate 94, wherein the sliding plate 94 is threadedly connected to the screw rod 61, and the sliding plate 94 is slidingly connected to the sliding rod 62, and a plurality of sliding posts 92 are fixedly arranged at the lower end of the sliding plate 94, and the sliding post 92 is slidingly connected to the abutment plate 91, and a limit spring 921 is sleeved and arranged on the sliding post 92, and the two ends of the limit spring 921 are respectively fixedly connected to the abutment plate 91 and the sliding plate 94, and a limit bolt 93 is fixedly arranged at the end of the sliding post 92 away from the sliding plate 94. Such a design enables the float 81 to drive the abutment plate 91 to rise when the liquid level of the petroleum liquid in the liquid storage chamber 52 rises under the action of the limit spring 921.

[0041] The motor chamber 55 in this embodiment is arranged at the top of the liquid storage chamber 52, the drive motor is fixedly arranged in the motor box, and the output shaft of the drive motor is fixedly connected to the screw rod 61. Such a design ensures that the motor is separated from the gas storage chamber 51, and avoids the drive motor being affected by natural gas.

[0042] The cyclone 1 in this embodiment includes a first guide portion 11 and a second guide portion 12, the first guide portion 11 is a cylindrical structure, the second guide portion 12 is a truncated cone structure, the first guide portion 11 is arranged above the second guide portion 12, the second air outlet pipe 14 is arranged at the top of the first guide portion 11, the second liquid outlet pipe 15 is arranged at the bottom of the second guide portion 12, and the liquid inlet pipe 13 is arranged on the side wall of the first guide portion 11. The water pump 2 is fixedly arranged on the second liquid outlet pipe 15 to increase the flow rate of water entering the liquid storage chamber 52. The first connecting pipe 31 is fixed to the second air outlet pipe 14 by threaded connection to facilitate the disassembly and replacement of the first connecting pipe 31 and the second connecting pipe 32. The second connecting pipe 32 is connected to the water pump 2. The crude oil enters from the side wall of the first guide part 11 and forms a vortex along the side wall of the first guide part 11. During the rotation, the natural gas in the crude oil is separated from the crude oil. The frustum-shaped design of the second guide part 12 allows the petroleum liquid to be concentrated on the side of the liquid storage pipe, making it convenient to discharge the petroleum liquid.

[0043] The limit plate in this embodiment is arranged in the air storage chamber 51, the connecting rod 84 is slidably connected to the third limit plate, and a plurality of second support rods are fixedly arranged on the third limit plate and the inner wall of the air storage chamber 51. This design is to ensure that the connecting rod 84 will not be skewed during the process of the float 81 rising and falling, thereby affecting the pressure balance of the liquid storage chamber 52 and the air storage chamber 51.

[0044] The working process of this embodiment is as follows: when it is necessary to test the liquid water content of crude oil, the crude oil is first introduced into the cyclone 1, and the natural gas in the crude oil is separated from the oil by centrifugal force. The obtained natural gas enters the gas storage chamber 51 through the second gas outlet pipe 14 and the first connecting pipe 31, and the obtained oil enters the liquid storage chamber 52 through the second liquid storage pipe and the second connecting pipe 32. At this time, if the natural gas entering the gas storage chamber 51 is more than the oil in the liquid storage chamber 52, then under the action of air pressure, the float 81 moves downward, and at this time the first blocking part 851 and the second blocking part 852 seal the second balance tank 72 and open the first balance tank 71, so that more natural gas will be discharged; if the natural gas entering the gas storage chamber 51 is less than the oil in the liquid storage chamber 52, the liquid level of the liquid storage chamber 52 rises, driving the float 81 to rise, and at this time the first blocking part 851 and the second blocking part 852 seal the first balance tank 71 and open the second balance tank 72, so that more oil will be discharged.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crude oil metering device, comprising a fixed frame (4), characterized in that: The fixing frame (4) is fixed with a cyclone (1) and a regulating box (5); the top of the cyclone (1) is provided with a first connecting pipe (31); the bottom of the cyclone (1) is provided with a second connecting pipe (32); the lower side of the regulating box (5) is provided with a liquid storage chamber (52); the upper side of the regulating box (5) is provided with an air storage chamber (51); the liquid storage chamber (52) is connected to the second connecting pipe (32); the air storage chamber (51) is connected to the first connecting pipe (31); and the side wall of the air storage chamber (51) is also provided with a second connecting pipe (32). an air outlet pipe (53), a first liquid outlet pipe (54) is provided on the side wall of the liquid storage chamber (52), a balancing structure for maintaining pressure balance between the liquid storage chamber (52) and the air storage chamber (51) is provided between the first air outlet pipe (53) and the first liquid outlet pipe (54), an adjusting structure for controlling and adjusting the balancing structure is also provided in the adjusting box (5), a gas flow meter (531) is provided on the first air outlet pipe (53), a liquid flow meter (541) and a water content tester (541) are provided on the first liquid outlet pipe (54), 42), the balancing structure comprises a first balancing box (71) and a second balancing box (72), the first balancing box (71) being fixedly arranged in the air storage chamber (51), the first balancing box (71) being connected to the first air outlet pipe (53), the second balancing box (72) being fixedly arranged in the liquid storage chamber (52), the second balancing box (72) being connected to the first liquid outlet pipe (54), a partition (56) being arranged between the liquid storage chamber (52) and the air storage chamber (51), an adjusting member being slidably connected to the partition (56) (8), the adjusting member (8) is slidably connected to the first balance box (71) and the second balance box (72) at the same time, the adjusting member (8) comprises a float (81), the partition plate (56) is provided with a sliding hole (561), the float (81) is slidably connected to the sliding hole (561), a connecting rod (84) is fixed to the float (81), both ends of the connecting rod (84) are fixed with a limit plate (87), and the adjusting structure comprises a contact member (9), and the contact member (9) is in contact with the limit plate (87).

2. A crude oil metering device according to claim 1, characterized in that: The first balance box (71) is provided with a plurality of air inlet holes (712), and the second balance box (72) is provided with a plurality of liquid inlet holes (721), wherein the liquid inlet holes (721) and the air inlet holes (712) are arranged in the movement stroke of the adjusting member (8).

3. A crude oil metering device according to claim 2, characterized in that: The first balance box (71) is a cylindrical structure. An air guide cavity (713) is provided in the first balance box (71). The number of the air inlet holes (712) is two and they are respectively arranged at the top and bottom of the first balance box (71). A plurality of first support rods (711) are fixed between the first balance box (71) and the air storage cavity (51). The first balance box (71) and the second balance box (72) have the same structure.

4. A crude oil metering device according to claim 2, characterized in that: A first blocking member (85) is fixed on the upper side of the connecting rod (84), and a second blocking member (86) is fixed on the lower side of the connecting rod (84). The float (81) is a cylindrical structure. A first limiting plate (82) and a second limiting plate (83) are respectively fixed at the upper and lower ends of the float (81). Both the first limiting plate (82) and the second limiting plate (83) are disc-shaped structures.

5. A crude oil metering device according to claim 4, characterized in that: The first sealing member (85) comprises a first sealing portion (851) and a second sealing portion (852); the first sealing portion (851) and the second sealing portion (852) are both truncated cone structures; a sealing layer is fixed to the outside of the first sealing portion (851) and the second sealing portion (852); the sealing layer is made of rubber material; the first sealing portion (851) is arranged in the first balancing box (71); the second sealing portion (852) is arranged outside the first sealing box; the second sealing member (86) and the first sealing member (85) have the same structure.

6. A crude oil metering device according to claim 5, characterized in that: A screw rod (61) is rotatably connected in the air storage chamber (51), a sliding rod (62) is fixed in the air storage chamber (51), the screw rod (61) and the sliding rod (62) are parallel to each other, the abutment member (9) is threadedly connected to the screw rod (61), and the abutment member (9) is slidingly connected to the sliding rod (62).

7. A crude oil metering device according to claim 6, characterized in that: The abutment member (9) comprises an abutment plate (91) and a sliding plate (94); the sliding plate (94) is threadedly connected to the screw rod (61); the sliding plate (94) is slidingly connected to the sliding rod (62); a plurality of sliding columns (92) are fixed to the lower end of the sliding plate (94); the sliding columns (92) are slidingly connected to the abutment plate (91); a limit spring (921) is sleeved on the sliding column (92); two ends of the limit spring (921) are respectively fixedly connected to the abutment plate (91) and the sliding plate (94); and a limit bolt (93) is fixed to the end of the sliding column (92) away from the sliding plate (94).

8. A crude oil metering device according to claim 6, characterized in that: A motor chamber (55) is also provided at the top of the liquid storage chamber (52), a drive motor is fixed in the motor box, and an output shaft of the drive motor is fixedly connected to the screw rod (61).

9. A crude oil metering device according to claim 1, characterized in that: The cyclone (1) comprises a first flow guide portion (11) and a second flow guide portion (12); the first flow guide portion (11) is a cylindrical structure, the second flow guide portion (12) is a truncated cone structure, the first flow guide portion (11) is arranged above the second flow guide portion (12), a second air outlet pipe (14) is arranged at the top of the first flow guide portion (11), a second liquid outlet pipe (15) is arranged at the bottom of the second flow guide portion (12), a liquid inlet pipe (13) is arranged on the side wall of the first flow guide portion (11), a water pump (2) is fixed to the second liquid outlet pipe (15), the first connecting pipe (31) is fixed to the second air outlet pipe (14) by threaded connection, and the second connecting pipe (32) is connected to the water pump (2).

10. A crude oil metering device according to claim 4, characterized in that: A third limit plate (88) is provided in the air storage cavity (51), the connecting rod (84) is slidably connected to the third limit plate (88), and a plurality of second support rods (881) are fixed to the third limit plate (88) and the inner wall of the air storage cavity (51).

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