Oil-water interface controller and three-phase separation device

Abstract

The utility model discloses an oil-water interface controller and a three-phase separation device, the three-phase separation device comprises a separation tank and an oil weir groove, the separation tank is divided into an oil-liquid mixing area and an oil area by the oil weir groove, and the separation tank is provided with an inlet pipeline communicated with the oil-liquid mixing area, an oil outlet pipeline communicated with the oil weir groove and a water outlet pipeline communicated with a water outlet cavity; the oil-water interface controller comprises an outer sleeve, an inner sleeve, an adjusting cylinder and a valve rod lifting assembly, the outer sleeve is in sealed connection with the outer wall of the inner sleeve to form a water outlet cavity and an air balance cavity, the adjusting cylinder is located on the inner side of the inner sleeve and matched with the inner sleeve, the upper end of the adjusting cylinder is connected with the valve rod lifting assembly, and the adjusting cylinder ascends or descends relative to the water outlet cavity of the inner sleeve. A passage is formed among the outer sleeve, the inner sleeve and the adjusting cylinder through the water inlet cavity, the overflow port and the water outlet cavity. According to the technical scheme, the oil-water interface can be maintained and stabilized at a required position through an external transmission adjusting mechanism, and the oil-water interface is not influenced by liquid components and is not influenced by various high-viscosity substances.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and natural gas separation, in particular to an oil-water interface controller and a three-phase separation device. Background Art

[0002] In the process of oil and gas extraction, due to the diversity of underground conditions, the extracted oil is often accompanied by natural gas, groundwater and various salts. After high-pressure natural gas is extracted, it often contains saturated water or free water or various heavy components. After extraction, this high-pressure mixture needs to be initially separated and transported. Three-phase separators are the most widely used.

[0003] On June 6, 2012, a Chinese patent document published a high-frequency resonant induction coalescence oil-gas-water separation device, and the patent publication number is CN102796554B. The scheme mainly consists of a separation device shell, an oil-gas-water mixed liquid inlet, an oil-gas pre-separation cylinder, a radio frequency admittance oil-water interface detector, a self-operated regulating valve and a float liquid level regulator. A water washing chamber, an oil-water separation chamber, a sedimentation chamber and an oil chamber are arranged inside the shell cylinder. A resonant induction coalescence module composed of mutually insulated resonant coalescence tubes and spiral electrodes is arranged between the water washing chamber and the oil-water separation chamber. A radio frequency admittance oil-water interface detector is arranged in the sedimentation chamber; a float liquid level regulator is arranged in the middle and lower part of the oil chamber; the float liquid level regulator is set as a float liquid level regulating mechanism composed of a float, a connecting rod, a weight block and an oil outlet regulating valve; an electric regulating valve is installed at the water outlet, and the control signal of the electric regulating valve is connected to the signal generator of the radio frequency admittance oil-water interface detector.

[0004] This solution utilizes the linkage between the float and the electrical signal, and a dedicated electronic interface meter for oil-water interface detection. The liquid level can be controlled by adjusting the switch of the regulating valve through the output of the electrical signal in conjunction with the controller. During the separation process, the oil-water interface can be controlled within a certain range.

[0005] However, in actual operation, due to the ever-changing underground conditions and the medium containing various high-viscosity substances, the electronic surface equipment immersed in the mixed liquid for a long time is covered, and detection errors cause the entire separation system to be disordered. Summary of the invention

[0006] In view of the above-mentioned prior art that the medium contains various high-viscosity substances, which causes the electronic surface equipment immersed in the liquid for a long time to be covered, and the detection error causes the whole separation system to be disordered, the utility model provides an oil-water interface controller and a three-phase separation device. Through this technical solution, the oil-water interface can be maintained stable at the required position through the external transmission adjustment mechanism, and it is not affected by the liquid components and various high-viscosity substances.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: an oil-water interface controller, comprising an outer sleeve, an inner sleeve, an adjusting sleeve and a valve stem lifting assembly arranged coaxially, the bottom end of the outer sleeve is sealed and connected to the outer wall of the inner sleeve to form a water outlet chamber and an air balance chamber located above the water outlet chamber, the adjusting sleeve is located on the inner side of the inner sleeve and cooperates with the axial clearance of the inner sleeve, an overflow port is provided at the upper end of the adjusting sleeve, and the upper end of the adjusting sleeve is connected to the valve stem lifting assembly, so that the adjusting sleeve can rise or fall axially relative to the water outlet chamber of the inner sleeve, and a passage is formed between the outer sleeve, the inner sleeve and the adjusting sleeve through the water inlet chamber, the overflow port and the water outlet chamber.

[0008] Furthermore, a support seat 1, a positioning plate and a sealing ring are arranged between the inner sleeve and the adjusting cylinder. The support seat 1 is arranged on the inner wall of the top end of the inner sleeve. The positioning plate is installed on the bottom of the support seat 1 through fasteners. The sealing ring is located between the positioning plate and the adjusting cylinder.

[0009] Furthermore, a transmission lower support is provided at the upper end of the outer sleeve, and the valve stem lifting assembly includes an upper valve stem and a lower valve stem connected by a valve stem connector, and the lower valve stem is connected to the adjusting cylinder by a support seat 2 arranged at the top of the adjusting cylinder, two oppositely arranged split rings and a locking nut connected to the support seat.

[0010] Furthermore, the outer sleeve, the adjusting sleeve and the lower transmission support constitute the air balance chamber; the water inlet chamber, the water outlet chamber and the overflow chamber form an isolated space through a sealing ring; the adjusting sleeve can slide up and down in the water inlet chamber, and the air balance chamber is connected to the external space through the through hole at the top of the outer sleeve.

[0011] Furthermore, a flower plate 1 is arranged between the inner sleeve and the outer sleeve, a flower plate 2 is arranged between the adjusting sleeve and the outer sleeve, an overflow chamber is formed between the outer sleeve, the adjusting sleeve, the flower plate 1 and the flower plate 2, and the overflow chamber is located between the air balance chamber and the water outlet chamber.

[0012] Furthermore, it also includes an adjustable actuator, which is connected to the lower transmission support via an upper transmission support, and a transmission screw sleeve and upper and lower plane bearings are arranged between the upper valve stem and the upper transmission support, the transmission output end of the adjustable actuator is connected to the transmission screw sleeve via a key, the transmission screw sleeve and the upper valve stem are connected and transmitted via a trapezoidal thread, and the transmission screw sleeve is placed on upper and lower plane bearings.

[0013] Furthermore, a sealing packing assembly is provided between the upper valve stem and the lower transmission support, and a packing compression nut is installed on the lower transmission support above the sealing packing assembly.

[0014] Furthermore, the bottom of the upper valve stem is provided with a limit head, the limit head is located below the transmission lower support, and the size of the limit head is larger than the diameter of the upper valve stem.

[0015] The utility model provides a three-phase separation device, which is provided with the above-mentioned oil-liquid interface controller. The three-phase separation device comprises a separation tank, in which an oil weir is arranged. The separation tank is divided into an oil-liquid mixing zone and an oil zone by the oil weir. The separation tank is provided with an inlet pipe connected to the oil-liquid mixing zone, an oil outlet pipe connected to the oil weir, and a water outlet pipe connected to a water outlet cavity and the outside of the separation tank; a passage is formed between the oil-liquid interface controller and the oil-liquid mixing zone through the water inlet cavity, the overflow port and the water outlet cavity.

[0016] Furthermore, a mounting seat is provided at one end of the inner sleeve close to the bottom of the separation tank, and the inner sleeve is fixed to the bottom of the tank through the mounting seat. The upper side of the separation tank has a flange joint, and the outer sleeve passes through the flange joint. A connecting support is provided at the upper end of the outer sleeve, and the connecting support is connected to the transmission lower support through a fastener.

[0017] In summary, the utility model has the following beneficial effects:

[0018] (1) Through the coordinated action of the outer sleeve, the inner sleeve, the regulating sleeve and the connecting valve stem lifting assembly, the regulating sleeve is driven to rise and fall to adjust the position of the oil-water interface, thereby realizing precise control of the oil-water interface. The top of the outer sleeve extends to the top of the separation tank, and a water inlet chamber is provided at the bottom. A passage is formed between the oil-liquid interface controller and the oil-liquid mixing zone through the water inlet chamber, the overflow port and the water outlet chamber. The separated water flows into the passage through the outer sleeve and is isolated from the oil phase in the oil-liquid mixing zone and discharged, thereby providing protection for the components inside the outer sleeve and avoiding the influence of high-viscosity substances.

[0019] (2) The device divides the area inside the separation tank into an oil-liquid mixing area and an oil area by setting up an oil weir, effectively isolating media of different phases. The setting of the oil weir and the oil-liquid interface controller enables the oil to form an orderly stratification in the separation tank, which is convenient for subsequent separation processing.

[0020] (3) Water enters the water inlet chamber near the bottom of the tank from the bottom of the oil tank, then enters the inner sleeve and flows out from the overflow port opened at the top. The outflowing liquid enters the balance chamber, enters the overflow chamber through the second flower plate, and then enters the water outlet chamber through the first flower plate. The water outlet chamber is sealed by a pipeline, and water is transported out of the water outlet chamber. The regulating cylinder can rise or fall axially relative to the water outlet chamber of the inner sleeve. By adjusting the relative height difference between the overflow port opened on the inner sleeve and the oil weir plate, the thickness of the oil layer can be adjusted, thereby indirectly adjusting the height of the oil-water interface to the required position.

[0021] (4) The regulating actuator disposed outside the separation tank is connected to the valve stem lifting assembly. Through the coordinated action of the outer sleeve, the inner sleeve, the regulating cylinder and the connected valve stem lifting assembly, the regulating cylinder is driven to rise and fall to adjust the position of the oil-water interface, thereby achieving precise control of the oil-water interface, thereby flexibly controlling the oil separation process and making the operation simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the mechanism of the three-phase separation device at the oil-liquid interface.

[0023] Figure 2 Schematic diagram of the separation tank structure.

[0024] Figure 3 Schematic diagram of the oil-water interface controller structure.

[0025] Figure 4 Schematic diagram of the connection between the upper valve stem and the lower valve stem.

[0026] Figure 5 It is a schematic diagram of the structure of the inner sleeve and the adjusting cylinder.

[0027] Figure 6 It is a schematic diagram of the regulating actuator.

[0028] The reference numerals are as follows: 1. separation tank; 11. oil weir groove; 12. water weir plate; 13. inlet pipe; 14. oil outlet pipe; 15. water outlet pipe; 16. flange joint; 2. oil-liquid mixing area; 3. oil area; 4. water area; 5. oil-water interface controller; 51. outer sleeve; 511. water outlet cavity; 512. connecting support; 513. transmission lower support; 514. flower plate one; 515. flower plate two; 516. sealing packing assembly; 517. packing pressing nut; 52. inner sleeve; 521. water inlet cavity; 522. support seat one; 523. positioning plate; 524. sealing ring; 525. installation Mounting seat; 53, adjusting cylinder; 531, gas balance chamber; 532, overflow chamber; 533, overflow port; 534, supporting seat 2; 535, split ring; 536, locking nut; 54, valve stem lifting assembly; 541, upper valve stem; 5411, limit head; 542; lower valve stem; 543, valve stem connector; 55, regulating actuator; 551, transmission upper support; 552, transmission screw sleeve; 553, plane bearing. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the embodiments.

[0030] Embodiment 1:

[0031] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an oil-water interface controller 5 comprises an outer sleeve 51, an inner sleeve 52, an adjusting sleeve 53 and a valve stem lifting assembly 54 which are coaxially arranged. The bottom end of the outer sleeve 51 is sealedly connected to the outer wall of the inner sleeve 52 to form a water outlet chamber 511 and a gas balance chamber 531 located above the water outlet chamber 511. The adjusting sleeve 53 is located on the inner side of the inner sleeve 52 and cooperates with the axial clearance of the inner sleeve 52. An overflow port 533 is provided at the upper end of the adjusting sleeve 53, and the upper end of the adjusting sleeve 53 is connected to the valve stem lifting assembly 54, so that the adjusting sleeve 53 can rise or fall axially relative to the water outlet chamber 511 of the inner sleeve 52. A passage is formed between the outer sleeve 51, the inner sleeve 52 and the adjusting sleeve 53 through the water inlet chamber 521, the overflow port 533 and the water outlet chamber 511.

[0032] Through the coordinated action of the outer sleeve 51, the inner sleeve 52, the adjusting sleeve 53 and the connecting valve stem lifting assembly 54, the adjusting sleeve 53 is driven to rise and fall to adjust the position of the oil-water interface, thereby realizing precise control of the oil-water interface. The top end of the outer sleeve 51 extends to the top of the separation tank 1, and a water inlet chamber 521 is provided at the bottom end. The oil-liquid mixing zone 2 forms a passage by using the water inlet chamber 521, the overflow port 533 and the water outlet chamber 511. The outer sleeve 51 is used to isolate the separated water from the oil phase of the oil-liquid mixing zone 2, thereby providing protection for the components in the outer sleeve 51 and avoiding the influence of high-viscosity substances.

[0033] During implementation, a support seat 522, a positioning plate 523 and a sealing ring 524 are provided between the inner sleeve 52 and the adjusting sleeve 53. The support seat 522 is provided on the inner wall of the top end of the inner sleeve 52. The positioning plate 523 is installed on the bottom of the support seat 522 through fasteners. The sealing ring 524 is located between the positioning plate 523 and the adjusting sleeve 53.

[0034] In implementation, the upper end of the outer sleeve 51 is provided with a transmission lower support 513, and the valve stem lifting assembly 54 includes an upper valve stem 541 and a lower valve stem 542 connected by a valve stem connector 543, and the lower valve stem 542 is connected to the adjustment cylinder 53 through a support seat 2 534 provided at the top of the adjustment cylinder 53, two oppositely arranged split rings 535, and a locking nut 536 connected to the support seat. The outer sleeve 51, the adjustment cylinder 53, and the transmission lower support 513 form the gas balance chamber 531; the water inlet chamber 521, the water outlet chamber 511, and the overflow chamber 532 form an isolated space through a sealing ring 524; the adjustment cylinder 53 can slide up and down in the water inlet chamber 521, and the gas balance chamber 531 is connected to the external space through the through hole at the top of the outer sleeve 51. A flower plate 1 514 is provided between the inner sleeve 52 and the outer sleeve 51, a flower plate 2 515 is provided between the adjusting sleeve 53 and the outer sleeve 51, and an overflow chamber 532 is formed between the outer sleeve 51, the adjusting sleeve 53, the flower plate 1 514 and the flower plate 2 515, and the overflow chamber 532 is located between the gas balance chamber 531 and the water outlet chamber 511.

[0035] During implementation, the valve also includes an adjustable actuator 55, which is connected to the lower transmission support 513 through the upper transmission support 551, and a transmission screw sleeve 552 and upper and lower plane bearings 553 are arranged between the upper valve stem 541 and the upper transmission support 551. The transmission output of the adjustable actuator 55 is connected to the transmission screw sleeve 552 through a key, and the transmission screw sleeve 552 and the upper valve stem 541 are connected and transmitted through a trapezoidal thread, and the transmission screw sleeve 552 is placed on the upper and lower plane bearings 553. A sealing packing assembly 516 is arranged between the upper valve stem 541 and the lower transmission support 513, and a packing compression nut 517 is installed on the lower transmission support 513 above the sealing packing assembly 516. The bottom of the upper valve stem 541 has a limit head 5411, which is located below the lower transmission support 513, and the size of the limit head 5411 is larger than the diameter of the upper valve stem 541.

[0036] Embodiment 2:

[0037] like Figures 1 to 6 As shown, a three-phase separation device includes a separation tank 1, in which an oil weir 11 is arranged, and the separation tank 1 is divided into an oil-liquid mixing zone 2 and an oil zone 3 by the oil weir 11. The separation tank 1 is provided with an inlet pipe 13 connected to the oil-liquid mixing zone 2, an oil outlet pipe 14 connected to the oil weir 11, and a water outlet pipe 15 connected to a water outlet cavity 511 and the outside of the separation tank 1; based on the oil-liquid interface controller 5 in Example 1, a passage is formed between the oil-liquid interface controller 5 and the oil-liquid mixing zone 2 through the water inlet cavity 521, the overflow port 533 and the water outlet cavity 511.

[0038] A mounting seat 525 is provided at one end of the inner sleeve 52 close to the bottom of the separation tank 1, and the inner sleeve 52 is fixed to the bottom of the tank through the mounting seat 525. The upper side of the separation tank 1 has a flange joint 16, and the outer sleeve 51 passes through the flange joint 16. The upper end of the outer sleeve 51 is sleeved with a connecting support 512, and the connecting support 512 is connected to the transmission lower support 513 through fasteners.

[0039] The oil-liquid interface controller 5 in Example 1 is arranged in the separation tank 1, and the outer sleeve 51 is connected to the outside of the tank through the water outlet cavity 511. Therefore, the structure of the interface controller can be used without setting the water area 4 in the tank, and the water can be directly discharged out of the tank.

[0040] Embodiment 3:

[0041] like Figures 1 to 6As shown, a three-phase separation device comprises a separation tank 1, wherein the separation tank 1 is provided with an oil weir groove 11 and a water weir plate 12, wherein the separation tank 1 is divided into an oil-liquid mixing area 2, an oil area 3 and a water area 4 by the oil weir groove 11 and the water weir plate 12, wherein the separation tank 1 is provided with an inlet pipe 13 connected to the oil-liquid mixing area 2, an oil outlet pipe 14 connected to the oil weir groove 11, and a water outlet pipe 15 connected to the water area 4;

[0042] An oil-water interface controller 5 is arranged in the separation tank 1, and the oil-water interface controller 5 includes an outer sleeve 51, an inner sleeve 52, an adjusting sleeve 53 and a valve stem lifting assembly 54 which are coaxially arranged. The bottom end of the outer sleeve 51 is sealed and connected to the outer wall of the inner sleeve 52 to form a water outlet chamber 511. The inner sleeve 52 is connected to the oil-liquid mixing zone 2 through a water inlet chamber 521 at the bottom. The adjusting sleeve 53 is located on the inner side of the inner sleeve 52 and cooperates with the axial clearance of the inner sleeve 52. An overflow port 533 is provided at the upper end of the adjusting sleeve 53, and the upper end of the adjusting sleeve 53 is connected to the valve stem lifting assembly 54, so that the adjusting sleeve 53 can rise or fall axially relative to the water outlet chamber 511 of the inner sleeve 52. A passage is formed between the water zone 4 and the oil-liquid mixing zone 2 through the water inlet chamber 521, the overflow port 533 and the water outlet chamber 511.

[0043] The crude oil mixture is collected from the formation, passes through the inlet pipe 13, and the oil and water are deposited to the bottom under the action of gravity. After the oil and water are filled at the bottom of the separation tank 1, due to the different densities of oil and water, the oil floats on the water. When the oil position exceeds the highest position of the oil weir plate, it overflows into the special oil weir groove 11. Since a passage is formed between the water area 4 and the oil-liquid mixing area 2 through the water inlet chamber 521, the overflow port 533 and the water outlet chamber 511, the water at the bottom of the separation tank 1 flows into the water area 4 through the water inlet chamber 521 of the inner sleeve 52 via the overflow port 533 and the water outlet chamber 511. The water area 4 is a temporary water storage outflow area separated by the water weir plate 12 and the inner wall of the separation tank 1.

[0044] Embodiment 4:

[0045] An oil weir 11 and a water weir plate 12 are provided in the separation tank 1. The separation tank 1 is divided into an oil-liquid mixing area 2, an oil area 3 and a water area 4 by the oil weir 11 and the water weir plate 12. The separation tank 1 is provided with an inlet pipe 13 connected to the oil-liquid mixing area 2, an oil outlet pipe 14 connected to the oil weir 11, and a water outlet pipe 15 connected to the water area 4; an oil-water interface controller 5 is also provided in the separation tank 1.

[0046] On the basis of Example 3, Figure 3 , Figure 4 and Figure 5As shown, a support seat 522, a positioning plate 523 and a sealing ring 524 are provided between the inner sleeve 52 and the adjusting sleeve 53. The support seat 522 is provided on the inner wall of the top end of the inner sleeve 52. The positioning plate 523 is installed on the bottom of the support seat 522 by fasteners. The sealing ring 524 is located between the positioning plate 523 and the adjusting sleeve 53.

[0047] The separation tank 1 has a flange joint 16 on the upper side, and the outer sleeve 51 passes through the flange joint 16. The upper end of the outer sleeve 51 is sleeved with a connecting support 512, and the connecting support 512 is connected to a transmission lower support 513 by a fastener. The valve stem lifting assembly 54 includes an upper valve stem 541 and a lower valve stem 542 connected by a valve stem connector 543. The lower valve stem 542 is connected to the adjusting cylinder 53 by a support seat 534 arranged at the top of the adjusting cylinder 53, two oppositely arranged split rings 535 and a locking nut 536 connected to the support seat.

[0048] Embodiment 5:

[0049] An oil weir 11 and a water weir plate 12 are provided in the separation tank 1. The separation tank 1 is divided into an oil-liquid mixing area 2, an oil area 3 and a water area 4 by the oil weir 11 and the water weir plate 12. The separation tank 1 is provided with an inlet pipe 13 connected to the oil-liquid mixing area 2, an oil outlet pipe 14 connected to the oil weir 11, and a water outlet pipe 15 connected to the water area 4; an oil-water interface controller 5 is also provided in the separation tank 1.

[0050] On the basis of Example 3, Figure 1 and Figure 3 As shown, a flower plate 1 514 is provided between the inner sleeve 52 and the outer sleeve 51, a flower plate 2 515 is provided between the regulating sleeve 53 and the outer sleeve 51, an overflow chamber 532 is formed between the outer sleeve 51, the regulating sleeve 53, the flower plate 1 514 and the flower plate 2 515, and the outer sleeve 51, the regulating sleeve 53, the flower plate 2 515 and the transmission lower support 513 form an air balance chamber 531; the water inlet chamber 521 and the water outlet chamber 511 and the overflow chamber 532 form an isolated space through a sealing ring 524; the regulating sleeve 53 can slide up and down in the water inlet chamber 521, the overflow port 533 is connected with the air balance chamber 531, and the air balance chamber 531 is connected with the gas phase space of the separation tank 1 through the through hole at the top of the outer sleeve 51.

[0051] like Figure 6 As shown, a sealing packing assembly 516 is provided between the upper valve stem 541 and the lower transmission support 513 , and a packing compression nut 517 is installed on the lower transmission support 513 above the sealing packing assembly 516 .

[0052] The oil-water interface controller 5 also includes an adjustable actuator 55, which is connected to the lower transmission support 513 via an upper transmission support 551, and a transmission screw sleeve 552 and upper and lower plane bearings 553 are arranged between the upper valve stem 541 and the upper transmission support 551. The transmission output of the adjustable actuator 55 is connected to the transmission screw sleeve 552 via a key, and the transmission screw sleeve 552 and the upper valve stem 541 are connected and transmitted via a trapezoidal thread. The transmission screw sleeve 552 is placed on upper and lower plane bearings 553, and the transmission method is that the electric valve rotates to drive the transmission screw sleeve 552, and the transmission screw sleeve 552 drives the valve stem, and the transmission screw sleeve 552 does not move. The relative movement of the valve stem realizes the up and down movement of the entire lifting system.

[0053] In the above embodiment, a mounting seat 525 is provided at one end of the inner sleeve 52 close to the bottom of the separation tank 1, and the inner sleeve 52 is fixed to the bottom of the tank through the mounting seat 525. Because the medium is flammable and the separation device is a pressure vessel, the outer sleeve 51 has an opening, and the opening is connected to the water weir plate 12 through a pipe, and the opening position is connected using a standard pressure-bearing flange.

[0054] Preferably, the bottom of the upper valve stem 541 has a limit head 5411, which is located below the transmission lower support 513, and the size of the limit head 5411 is larger than the diameter of the upper valve stem 541. The upper valve stem 541 adopts a method in which the bottom of the valve stem is larger than the diameter of the valve stem, and when the valve stem is in danger of breaking, the pressurized gas will push the head outward, thereby improving safety.

[0055] Preferably, the bottom of the water weir plate 12 is connected to the separation tank 1 , a gap for oil liquid to flow is provided between the bottom of the oil weir groove 11 and the separation tank 1 , and the height of the water weir plate 12 is greater than the height of the oil weir groove 11 .

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil-water interface controller, characterized in that: The invention comprises an outer sleeve (51), an inner sleeve (52), an adjusting sleeve (53) and a valve stem lifting assembly (54) which are coaxially arranged. The bottom end of the outer sleeve (51) is sealedly connected to the outer wall of the inner sleeve (52) to form a water outlet cavity (511) and a gas balance cavity (531) located above the water outlet cavity (511). The adjusting sleeve (53) is located inside the inner sleeve (52) and is in axial clearance with the inner sleeve (52). An overflow port (533) is provided at the upper end of the adjusting sleeve (53). The upper end of the adjusting sleeve (53) is connected to the valve stem lifting assembly (54) so ​​that the adjusting sleeve (53) can rise or fall axially relative to the water outlet cavity (511) of the inner sleeve (52). A passage is formed between the outer sleeve (51), the inner sleeve (52) and the adjusting sleeve (53) through the water inlet cavity (521), the overflow port (533) and the water outlet cavity (511).

2. The oil-water interface controller (5) according to claim 1, characterized in that: A support seat (522), a positioning plate (523) and a sealing ring (524) are provided between the inner sleeve (52) and the adjusting sleeve (53); the support seat (522) is provided on the inner wall of the top end of the inner sleeve (52); the positioning plate (523) is mounted on the bottom of the support seat (522) via fasteners; and the sealing ring (524) is located between the positioning plate (523) and the adjusting sleeve (53).

3. The oil-water interface controller (5) according to claim 1, characterized in that: A transmission lower support (513) is provided at the upper end of the outer sleeve (51), and the valve stem lifting assembly (54) comprises an upper valve stem (541) and a lower valve stem (542) connected via a valve stem connector (543), and the lower valve stem (542) is connected to the adjustment cylinder (53) via a second support seat (534) provided at the top end of the adjustment cylinder (53), two oppositely arranged split rings (535), and a locking nut (536) connected to the support seat.

4. The oil-water interface controller (5) according to claim 3, characterized in that: The outer sleeve (51), the regulating sleeve (53) and the transmission lower support (513) form the gas balance chamber (531); the water inlet chamber (521), the water outlet chamber (511) and the overflow chamber (532) form an isolated space via a sealing ring (524); the regulating sleeve (53) can slide up and down in the water inlet chamber (521), and the gas balance chamber (531) is connected to the external space via a through hole at the top of the outer sleeve (51).

5. The oil-water interface controller (5) according to claim 3, characterized in that: A first flower plate (514) is provided between the inner sleeve (52) and the outer sleeve (51), a second flower plate (515) is provided between the regulating sleeve (53) and the outer sleeve (51), and an overflow chamber (532) is formed between the outer sleeve (51), the regulating sleeve (53), the first flower plate (514), and the second flower plate (515), and the overflow chamber (532) is located between the gas balance chamber (531) and the water outlet chamber (511).

6. The oil-water interface controller according to claim 3, characterized in that: The invention also comprises an adjustable actuator (55), wherein the adjustable actuator (55) is connected to the transmission lower support (513) via a transmission upper support (551), a transmission screw sleeve (552) and upper and lower plane bearings (553) are arranged between the upper valve stem (541) and the transmission upper support (551), the transmission output end of the adjustable actuator (55) is connected to the transmission screw sleeve (552) via a key, the transmission screw sleeve (552) and the upper valve stem (541) are connected and transmitted via a trapezoidal thread, and the transmission screw sleeve (552) is placed on the upper and lower plane bearings (553).

7. The oil-water interface controller according to claim 3, characterized in that: A sealing packing assembly (516) is provided between the upper valve stem (541) and the lower transmission support (513), and a packing compression nut (517) is installed on the lower transmission support (513) above the sealing packing assembly (516).

8. The oil-water interface controller according to claim 3, characterized in that: The bottom of the upper valve stem (541) is provided with a limit head (5411), the limit head (5411) is located below the transmission lower support (513), and the size of the limit head (5411) is larger than the diameter of the upper valve stem (541).

9. A three-phase separation device, characterized in that: The three-phase separation device comprises a separation tank (1) and an oil-water interface controller according to any one of claims 1 to 8, wherein an oil weir (11) is arranged in the separation tank (1), and the separation tank (1) is divided into an oil-liquid mixing zone (2) and an oil zone (3) by the oil weir (11), and the separation tank (1) is provided with an inlet pipe (13) connected to the oil-liquid mixing zone (2), an oil outlet pipe (14) connected to the oil weir (11), and a water outlet pipe (15) connected to a water outlet chamber (511) and outside the separation tank (1); a passage is formed between the oil-water interface controller (5) and the oil-liquid mixing zone (2) through the water inlet chamber (521), the overflow port (533) and the water outlet chamber (511).

10. The three-phase separation device according to claim 9, characterized in that: A mounting seat (525) is provided at one end of the inner sleeve (52) close to the bottom of the separation tank (1), and the inner sleeve (52) is fixed to the bottom of the tank via the mounting seat (525). The upper side of the separation tank (1) has a flange joint (16), and the outer sleeve (51) passes through the flange joint (16). The upper end of the outer sleeve (51) is sleeved with a connecting support (512), and the connecting support (512) is connected to the transmission lower support (513) via a fastener.

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