Expander sealing gas and lubricating oil recovery device

Abstract

The utility model belongs to the technical field of oil-gas separation, and particularly relates to an expander sealing gas and lubricating oil recovery device which comprises an adjusting cylinder, an adjusting device is arranged in the adjusting cylinder, the adjusting device comprises a filter cylinder I, a filter cylinder II and a gear assembly, and the filter cylinder I and the filter cylinder II are tightly attached to each other. The outer side of the filter cylinder I is provided with helical teeth, the outer side of the filter cylinder II is provided with helical teeth, the gear assembly extends out of the outer side of the adjusting cylinder, the gear assembly is matched with the helical teeth, and the gear assembly is adjusted to enable the filter cylinder II to rotate so as to change the position between the filter holes in the filter cylinder I and the filter cylinder II. The driving disc is adjusted to enable the bevel gear and the helical teeth to rotate in a meshed mode, the filter cylinder II is driven to rotate, meanwhile, the relative positions of the filter holes are changed, and the filtering size is changed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas separation, in particular to a sealing gas and lubricating oil recovery device for an expander. Background Art

[0002] The main public consumption of a natural gas expander during operation is sealing gas (generally natural gas drawn from the inlet of the expansion end) and lubricating oil. The sealing gas and lubricating oil enter the machine body separately. After completing their respective functions, the sealing gas and oil and gas are mixed together and flow back to the oil tank, which reduces the concentration of the lubricating oil. When it is then passed into the expander, the efficiency is reduced, and the sealing gas and oil and gas need to be separated.

[0003] In reality, as the processing capacity of the unit increases, the consumption of sealing gas will also increase accordingly. When the sealing gas is discharged, it will inevitably carry away the lubricating oil. Directly burning it in the flare will not only consume a large amount of natural gas in vain, but also increase the consumption of lubricating oil. Introducing the oil-containing seal into the booster inlet, although the sealing gas is recovered, the lubricating oil it carries will bring relatively large safety hazards to subsequent devices. The oil-gas separation device has only a single filtering structure, and has strict filtering and separation standards for the expansion machine oil and gas separation. It often requires a combination of multiple oil-gas separation devices to achieve the separation standards, which greatly increases the production cost and the separation time is longer.

[0004] There is an urgent need to design a device that can control and adjust the size of the lubricating oil during separation to achieve a more precise separation effect, speed up the separation time, and improve production efficiency. Utility Model Content

[0005] In response to the technical problems existing in the background technology, the purpose of the present invention is to provide an expander sealing gas and lubricating oil recovery device, which can control and adjust the size of the lubricating oil during separation to achieve a more refined separation effect, and can speed up the separation time and improve production efficiency.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] An expander sealing gas and lubricating oil recovery device includes an adjustment cylinder, an adjustment device is provided inside the adjustment cylinder, the adjustment device includes a filter cylinder I, a filter cylinder II and a gear assembly, the filter cylinder I and the filter cylinder II are arranged closely together, the outer side of the filter cylinder II is provided with helical teeth, the gear assembly extends outward from the adjustment cylinder, the gear assembly and the helical teeth cooperate, and the gear assembly is adjusted to rotate the filter cylinder II, thereby changing the position between the filter holes on the filter cylinders I and II.

[0008] Preferably, the regulating cylinder is provided with a feed pipe and an exhaust pipe, the inner wall of the regulating cylinder is provided with grooves I and II, and the circumferential surface of the regulating cylinder is provided with connecting holes.

[0009] Preferably, an annular boss is provided on filter cartridge I, which is connected to groove I. There are several filter holes on filter cartridge I and filter cartridge II. The filter holes on filter cartridge I and filter cartridge II are concentrically arranged. A support ring is provided on the bottom circumferential surface of filter cartridge II, and the support ring is rotatably arranged in groove II.

[0010] Preferably, the support ring is provided with helical teeth, the gear assembly includes a helical gear, a support rod and a drive disk, the helical gear and the helical teeth are meshed, one end of the support rod is connected to the helical gear, and the other end is connected to the drive disk, and the support rod is arranged through a connecting hole.

[0011] Preferably, the lower end of the regulating cylinder is connected to the separating cylinder, a discharge port is provided at the lower end of the circumferential surface of the separating cylinder, a support block is provided inside the separating cylinder, a groove III is provided inside the supporting block, a through hole is provided at the upper end of the supporting block, there are two through holes, and they are symmetrically arranged, and a driving wheel group and a driven wheel group are provided at the upper end of the groove III.

[0012] Preferably, the driving wheel assembly includes a rotating wheel, a motor and a connecting rod. The connecting rod in the driving wheel group extends from the through hole and is connected to the motor. The rotating wheel and the connecting rod are fixedly connected. One end of the connecting rod of the driven wheel group is fixedly set at the upper end of the groove III, and the other end is fixedly set with a limit block. The rotating wheel is rotatably set on the connecting rod, and a filter plate is provided at the lower end of the support block.

[0013] As a preference, a centrifugal turntable is provided at the center of the ring of the support block, the center of the centrifugal turntable is convex, a filtering surface is provided at the circumference of the centrifugal turntable, the filtering surface is provided at a curled position at the circumference of the centrifugal turntable, and a plurality of openings are provided on the filtering surface.

[0014] Preferably, a baffle is provided at the outer end of the filter surface, the baffle extends into groove III, and the circumferential surface of the baffle is in close contact with the rotating wheel. The baffle is L-shaped, and the filter surface is fixedly connected at the junction of the baffles. A limiting groove is formed between the baffle and the filter surface, and the lower end of the baffle is connected to the lower end of groove III.

[0015] The utility model has the following advantages and beneficial effects:

[0016] 1. In the present invention, the filter holes on filter cartridges I and II have the same diameter and are concentrically arranged. By adjusting the drive disc, the helical gear and the helical teeth engage and rotate, driving filter cartridge II to rotate, while changing the relative positions of the filter holes and thus changing the filter size.

[0017] 2. In the present invention, the motor drives the rotating wheel to rotate, thereby driving the centrifugal turntable to rotate. While separating the oil and gas, the lubricating oil is separated from the outside, which speeds up the separation efficiency.

[0018] 3. In the present invention, the device is simple to manufacture and install, has low use and maintenance costs, and a long service life, and can separate the sealing gas and lubricating oil through multiple steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of the expander sealing gas and lubricating oil recovery device provided by the utility model;

[0020] Figure 2 This is a schematic diagram of the connection between filter cartridges I and II of the expander sealing gas and lubricating oil recovery device provided by the utility model;

[0021] Figure 3 A half-section view of the internal structure of the separation cylinder of the expander sealing gas and lubricating oil recovery device provided by the utility model;

[0022] Figure 4 A cross-sectional view of the internal structure of the separation cylinder of the expander sealing gas and lubricating oil recovery device provided by the utility model;

[0023] Figure 5 An enlarged view of the internal structure of the expander sealing gas and lubricating oil recovery device provided by the utility model;

[0024] Icons: 1-exhaust pipe, 101-feed pipe, 2-adjusting cylinder, 21-groove I, 22-groove II, 23-connecting hole, 3-filter cylinder I, 31-annular boss, 4-filter cylinder II, 41-support ring, 42-helical teeth, 5-support rod, 51-helical gear, 52-drive disk, 6-separation cylinder, 61-discharge port, 7-support block, 71-groove III, 72-through hole, 73-connecting rod, 731-limiting block, 74-motor, 75-rotating wheel, 76-filter plate, 8-centrifugal turntable, 81-filter surface, 82-baffle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings 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.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] Example

[0028] An expander sealing gas and lubricating oil recovery device includes an adjusting cylinder 2, an adjusting device is provided inside the adjusting cylinder 2, the adjusting device includes a filter cylinder I3, a filter cylinder II4 and a gear assembly, the filter cylinder I3 and the filter cylinder II4 are arranged closely together, the outside of the filter cylinder II4 is provided with helical teeth 42, the gear assembly extends outward from the adjusting cylinder 2, the gear assembly and the helical teeth 42 cooperate, and the gear assembly is adjusted to rotate the filter cylinder II4, thereby changing the position between the filter holes on the filter cylinder I3 and the filter cylinder II4.

[0029] As a preferred embodiment of the present invention, specifically:

[0030] like Figure 1 、 2 As shown, the upper end of the regulating cylinder 2 is provided with a feed pipe 101 and an exhaust pipe 1, the inner wall of the regulating cylinder 2 is provided with a groove I21 and a groove II22, and a connecting hole 23 is provided on the circumferential surface of the regulating cylinder 2. The connecting hole 23 penetrates the circumferential surface to the interior of the regulating cylinder 2, and the connecting hole 23 is arranged at a position between the groove I21 and the groove II22. The interior of the regulating cylinder 2 is provided with an adjusting device, which includes a filter cylinder I3, a filter cylinder II4 and a gear assembly. The upper end of the filter cylinder I3 is provided with an annular boss 31, and the annular boss 31 is fixedly connected to the groove I21. The filter cylinder I3 and the filter cylinder II4 are arranged closely to each other. The diameter of the filter cylinder II4 is larger than the diameter of the filter cylinder I3. There are a number of filter holes on the filter cylinder I3 and the filter cylinder II4, and the diameter of the filter holes is the same. The filter cylinder The filter holes on Ⅰ3 and filter cartridge Ⅱ4 are concentrically arranged, and a support ring 41 is provided on the bottom circumferential surface of the filter cartridge Ⅱ4. The support ring 41 is rotatably arranged in the groove Ⅱ22, and a helical tooth 42 is provided on the support ring 41. The gear assembly includes a helical tooth wheel 42, a support rod 5 and a drive disk 52. The helical tooth 42 wheel and the helical tooth 42 are meshed. One end of the support rod 5 is fixedly connected to the helical tooth wheel 42, and the other end is fixedly connected to the drive disk 52. The support rod 5 is arranged through the connecting hole 23. Rotating the drive disk 52 can drive the helical tooth wheel 42 to rotate, and at the same time drive the filter cartridge Ⅱ4 to rotate, so that the position between the filter holes on the filter cartridge Ⅱ4 and the filter holes on the filter cartridge Ⅰ3 changes, thereby achieving the effect of filtering lubricating oils of different sizes, and the sealing gas is discharged from the exhaust pipe 1 at the upper end.

[0031] like Figure 1 、 3, 4, 5 The lower end of the regulating cylinder 2 is connected to the separation cylinder 6, and the lower end of the circumferential surface of the separation cylinder 6 is provided with a discharge port 61. A support block 7 is provided inside the separation cylinder 6. The support block 7 is annular. A groove III 71 is provided inside the support block 7. A through hole 72 is provided on the upper end of the support block 7. There are two through holes 72, which are symmetrically arranged and pass through the groove III 71. The upper end of the groove III 71 is provided with a driving wheel group and a driven wheel group. There are two driving wheel groups and two driven wheel groups, and they are symmetrically arranged in pairs. The driving wheel assembly includes The rotating wheel 75, the motor 74 and the connecting rod 73, the connecting rod 73 in the driving wheel group extends from the through hole 72 and is connected to the motor 74, the rotating wheel 75 and the connecting rod 73 are fixedly connected, the motor 74 drives the rotating wheel 75 to rotate, the driven wheel group includes the rotating wheel 75, the limit block 731 and the connecting rod 73, one end of the connecting rod 73 is fixedly set at the upper end of the groove III 71, and the other end is fixedly provided with a limit block 731, the rotating wheel 75 is rotatably set on the connecting rod 73, and the limit block 731 limits the rotating wheel 7 5 is in a vertical position, the lower end of the support block 7 is a filter plate 76 in the shape of an inclined platform, a centrifugal turntable 8 is provided at the center of the ring of the support block 7, the center of the centrifugal turntable 8 is convex, a filter surface 81 is provided at the circumference of the centrifugal turntable 8, the filter surface 81 is provided at a curled position at the circumference of the centrifugal turntable 8, a plurality of openings are provided on the filter surface 81, when the oil and gas are centrifuged, the lubricating oil is forced to gather at the position of the filter surface 81 and flows out from the filter surface 81, a baffle 82 is provided at the outer end of the filter surface 81, and the baffle 82 extends into the concave In the groove III 71, the circumferential surface of the baffle 82 is in close contact with the rotating wheel 75. The baffle 82 is L-shaped. The filtering surface 81 is fixedly connected to the intersection of the baffle 82. A limiting groove (at position A in the figure) is formed between the baffle 82 and the filtering surface 81. During centrifugation, the oil flows into the limiting groove. The lower end of the baffle 82 is connected to the lower end of the groove III 71. The motor 74 drives the rotating wheel 75 to rotate and then drives the baffle 82 and the centrifugal turntable 8 to rotate to separate the lubricating oil and the sealing gas. The separated lubricating oil is discharged from the discharge port 61.

[0032] Working principle: oil and gas enter the feed pipe 101 and fall into the filter cartridge I3 and the filter cartridge II4 by gravity. The drive disk 52 is rotated in advance, and the position between the filter holes on the filter cartridge I3 and the filter cartridge II4 is adjusted by rotating the bevel gear 42 to achieve lubricating oil filtration of different sizes. After selecting the appropriate size, the lubricating oil flows out from the bottom of the filter cartridge I3 and the filter cartridge II4, and the natural gas is discharged from the exhaust pipe 1 at the upper end. The lubricating oil falls onto the centrifugal turntable 8, and the control motor 74 rotates. The rotating wheel 75 rotates and drives the centrifugal turntable 8 to rotate at the same time. The lubricating oil is centrifuged to the filter surface 81 and falls from the filter surface 81. The natural gas is still discharged from the exhaust pipe 1 above. The baffle 82 contacts the driven wheel group when the centrifugal turntable 8 rotates to reduce friction. Considering that part of the lubricating oil will flow out from the seal between the baffle 82 and the support block 7, the filter plate 76 can collect and filter the outflowing lubricating oil into the separation cylinder 6. The lubricating oil in the separation cylinder 6 is finally discharged through the discharge port 61.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An expander seal gas and lubricating oil recovery device, comprising a regulating cylinder, characterized in that: An adjusting device is provided inside the adjusting cylinder, and the adjusting device includes a filter cylinder I, a filter cylinder II and a gear assembly. The filter cylinder I and the filter cylinder II are arranged closely together, and the outside of the filter cylinder II is provided with helical teeth. The gear assembly extends outward from the adjusting cylinder, and the gear assembly and the helical teeth cooperate. The gear assembly is adjusted to rotate the filter cylinder II, thereby changing the position between the filter holes on the filter cylinder I and the filter cylinder II.

2. The expander sealing gas and lubricating oil recovery device according to claim 1, characterized in that: The regulating cylinder is provided with a feeding pipe and an exhaust pipe, the inner wall of the regulating cylinder is provided with grooves I and II, and the circumferential surface of the regulating cylinder is provided with connecting holes.

3. The expander sealing gas and lubricating oil recovery device according to claim 2, characterized in that: The filter cartridge I is provided with an annular boss, which is connected to the groove I. There are a number of filter holes on the filter cartridge I and the filter cartridge II. The filter holes on the filter cartridge I and the filter cartridge II are concentrically arranged. A supporting ring is provided on the bottom circumferential surface of the filter cartridge II, and the supporting ring is rotatably arranged in the groove II.

4. The expander sealing gas and lubricating oil recovery device according to claim 3, characterized in that: The support ring is provided with helical teeth, and the gear assembly includes a helical gear, a support rod and a drive disk. The helical gear and the helical teeth are meshed, one end of the support rod is connected to the helical gear, and the other end is connected to the drive disk, and the support rod is arranged through the connecting hole.

5. The expander sealing gas and lubricating oil recovery device according to claim 4, characterized in that: The lower end of the regulating cylinder is connected to the separating cylinder, the lower end of the circumferential surface of the separating cylinder is provided with a discharge port, a supporting block is provided inside the separating cylinder, a groove III is provided inside the supporting block, a through hole is provided at the upper end of the supporting block, there are two through holes, and they are symmetrically arranged, and a driving wheel group and a driven wheel group are provided at the upper end of the groove III.

6. The expander sealing gas and lubricating oil recovery device according to claim 5, characterized in that: The driving wheel group includes a rotating wheel, a motor and a connecting rod. The connecting rod in the driving wheel group extends from the through hole and is connected to the motor. The rotating wheel and the connecting rod are fixedly connected. One end of the connecting rod of the driven wheel group is fixedly set at the upper end of the groove III, and the other end is fixedly set with a limit block. The rotating wheel is rotatably set on the connecting rod, and a filter plate is set at the lower end of the support block.

7. The expander sealing gas and lubricating oil recovery device according to claim 6, characterized in that: A centrifugal turntable is provided at the center of the ring of the support block. The center of the centrifugal turntable is convex. A filtering surface is provided at the circumference of the centrifugal turntable. The filtering surface is arranged at a curled position at the circumference of the centrifugal turntable and has a plurality of openings.

8. The expander sealing gas and lubricating oil recovery device according to claim 7, characterized in that: A baffle is provided at the outer end of the filter surface, which extends into the groove III, and the circumferential surface of the baffle is in close contact with the rotating wheel. The baffle is L-shaped, and the filter surface is fixedly connected at the intersection of the baffle. A limiting groove is formed between the baffle and the filter surface, and the lower end of the baffle is connected to the lower end of the groove III.

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