CN103285669A - Automatic gas-liquid separation and backflow integrated device and oil discharge stripping device - Google Patents
Automatic gas-liquid separation and backflow integrated device and oil discharge stripping device Download PDFInfo
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- CN103285669A CN103285669A CN201310169709XA CN201310169709A CN103285669A CN 103285669 A CN103285669 A CN 103285669A CN 201310169709X A CN201310169709X A CN 201310169709XA CN 201310169709 A CN201310169709 A CN 201310169709A CN 103285669 A CN103285669 A CN 103285669A
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Abstract
The invention discloses an automatic gas-liquid separation and backflow integrated device. The integrated device comprises a shell, a helical tube, a separation sieve, a draft tube, a floating ball, a floating ball connecting tube and a ball check valve, wherein the helical tube is mounted on the shell; both ends of the helical tube extend out of the shell, one end is used as an inlet of the gas-liquid separation device, and the other end is used as an outlet of the gas-liquid separation device; the separation sieve is arranged inside the shell and sleeved outside the spiral tube; the draft tube is led out from the lower end of the shell, one end of the draft tube is located inside the shell, and the other end of the draft tube is connected to a stripping pump inlet through the ball check valve; the floating ball is arranged inside the shell and located above the draft tube; the floating ball connecting tube is fixed to the lower end of the floating ball and sleeved to the draft tube. The gas-liquid separation and backflow integrated device has the advantages that in addition to the gas-liquid separation function, the device also integrates automatic on-off backflow function; when the device is used for an oil discharge system, the two segments of work of oil discharge and stripping can be accomplished with one stripping pump; compared with the traditional way of adopting two pumps for respectively accomplishing the two segments of work, the system and operational process are both simplified.
Description
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Technical field
The present invention relates to the oil storage and transportation field, particularly a kind of gas-liquid separation device for the emptying stripping system.
Background technology
When fluid such as crude oil carrier, vehicle-mounted oil tank means of transportation is carried out the emptying operation, after liquid level is lower than certain altitude, oil at the bottom of the needs employing stripping system suction oil tank, abundant to guarantee emptying.
Stripping pump is the core equipment in the stripping system, and normally rotary volume pump has stronger suction capacity, but the short time is carried the higher fluid of air content.Liquid level under the sweeping operating mode is lower, can sneak into a large amount of gases in the fluid, and along with liquid level constantly reduces, the gas liquid ratio in the fluid (volume ratio of gas phase and liquid phase in the mixing gas-liquid) constantly increases.When the fluid air content is too high, be easy to form vapour lock in the pump housing of stripping pump, cause its mechanical seal and rotor elements that dry friction can take place and a large amount of heating on the one hand, inlet capacity is obviously reduced, influence the operate as normal of pump, can cause mechanical seal and rotor elements to damage when serious, cause leakage of oil and the efficiency of pump sharply to descend the degradation phenomenon, and then cause whole system to run well.
Usually, stripping pump also is responsible for drawing oil work, drawing under the oily operating mode, and the main pump drainage pipeline of stripping pump air, problem and the sweeping operating mode that produce this moment are similar.
At oil pump downstream pipeline gas-liquid separation device is installed, can be partly refluxed to separated liquid oil in the oil pump oily gentle separation the in the medium, can alleviate the problems referred to above.Existing gas-liquid separation device is primarily aimed at oil well gas-liquid delivery operating mode and designs, the tangential oil-feed rotation of many employings separates, or gas-liquid separation is installed sieves, major function is to realize gas-liquid separation, partial devices is provided with return line, but backflow functionality can not realize opening and closing with medium air content size variation.The stripping system operating characteristic is different from the oil well gas-liquid and mixes communication system, only draw oil and two stages of sweeping have the big problem of medium air content, and abundant at emptying stage fluid, the fluid that enter return line this moment does not play practical significance, has reduced the operational efficiency of system on the contrary.Simultaneously because existing gas-liquid separation and reflux shortage oil storage function, draw oily exhaust phase can't the realization effect.
Summary of the invention
The object of the present invention is to provide a kind of automatic gas-liquid to separate and the backflow integrating device, have certain oil storage function, and only under medium air content condition with higher, open backflow functionality, be applicable to drawing oil, emptying, full stage of sweeping of emptying sweeping operation, can prevent from forming in the stripping pump vent plug, the operate as normal of assurance system improves operational efficiency.
Another object of the present invention is to provide the emptying sweeping device that comprises above-mentioned automatic gas-liquid separation and backflow integrating device.
The present invention solves the problems of the technologies described above by following technical proposals:
A kind of automatic gas-liquid separates and the backflow integrating device, comprise housing, helix tube, bolter, drainage tube, ball float, ball float is taken over and ball check valve, helix tube is installed on the housing, stretch out from housing at its two ends, one end is as the gas-liquid separation device import, the other end exports as gas-liquid separation device, bolter is located at enclosure interior, and is enclosed within outside the helix tube, and drainage tube is drawn from the housing lower end, the one end is positioned at enclosure interior, the other end is connected to the stripping pump entrance through ball check valve, and ball float is arranged in the housing, and is positioned at the drainage tube top, ball float is taken over and is fixed on the ball float lower end, and is enclosed within on the drainage tube.
Described ball float top is provided with the ball float position-limiting tube, and the below is provided with the ball float limiting plate.
The upper end of described helix tube has a plurality of jet orifices.Jet orifice is only opened the upper end at helix tube, guarantees can to keep the certain liquid level height in the separator, and the medium of the jet orifice that guarantees simultaneously to flow through when the fluid air content is higher is based on gas.
Have some aperture A on the tube wall that described ball float is taken over, have some aperture B on the drainage tube tube wall, ball float makes aperture A communicate with aperture B after sinking.
A kind of emptying sweeping device, comprise above-mentioned automatic gas-liquid separation and backflow integrating device, stripping pump, reducing motor, described stripping pump is lobed rotor pump, its outlet communicates with the gas-liquid separation device entrance, its pump housing entrance side is offered return port, and return port communicates with the return line of gas-liquid separation device.
As preferably, described stripping pump comprises the pump housing, be provided with the lobe pump rotor in the pump housing, the blade tip of lobe pump rotor is provided with roller mounting groove and rotor drainage trough, and the roller mounting groove fixedly has roller axle, and roller is installed on the roller axle, the two ends of roller are provided with the roller pad, the roller pad is provided with roller pad drainage trough, and the inboard of roller mounting groove is provided with the balance oil storage tank, and the balance oil storage tank communicates with the rotor drainage trough by roller pad drainage trough.
As preferably, described lobe pump rotor adopts fabricated structure, comprises left half way around and right half way around, and both connect by connecting pin.
As preferably, the surface of described roller arranges bin.
As preferably, described bin is bar-shaped trough or netted groove.
As preferably, described stripping pump, reducing motor, automatic gas-liquid separate and the backflow integrating device all is fixed on the mobile foundation.
Automatic gas-liquid separation of the present invention and backflow integrating device are except gas-liquid separating function, the also integrated backflow functionality of automatic open close, its occasion that can be used in various gas-liquid deliveries is carried out gas-liquid separation, when it is used for stripping system, be connected with the stripping system stripping pump, before system works, a certain amount of fluid that can prestore is in the first few minutes after the start, system is in draws oily operating mode, main pump drainage pipeline air, this moment, the device backflow functionality was opened automatically, and liquid storage is back to stripping pump inside in the device, in pump, form oil film, for pump provides lubricated and fluid-tight, make stripping pump can keep higher suction capacity, and fully lubricated; When running to the emptying operating mode, the medium air content is low, and backflow functionality is closed, and device enters the liquid storage state; When entering sweeping operating mode certain phase, the device backflow functionality is opened again, and emptying stage institute's oil storage liquid is back in the stripping pump, finishes until the sweeping operation.Improved running efficiency of system on the one hand; On the other hand, the unloading system of described device is installed, can be only finished emptying and two sections work of sweeping with a stripping pump, compare with the mode that tradition adopts two pumps to finish two sections operations respectively, system and operating process all are simplified.
And the backflow functionality of automatic open close realizes by the ball float structure, and ball float is arranged in the housing, and is positioned at the drainage tube top, and ball float is taken over and is fixed on the ball float lower end, and is enclosed within on the drainage tube; Lower in emptying process medium air content, liquid level is higher, and whole ball float is immersed in the liquid, ball float can float, and the aperture A on the tube wall that ball float is taken over and the aperture B of drainage tube tube wall are sorry next, and both do not communicate, liquid can't flow out through drainage tube in the housing like this, and backflow functionality is closed.Oil in oil tank is constantly discharged by stripping pump, when the oil in the oil tank is lower than certain liquid level, namely in the sweeping stage, decline along with liquid level in the oil tank, air content increases gradually in the medium, when gas liquid ratio reaches certain value, the liquid-tight degree of housing internal memory decreases, fluid density is low to moderate and is not enough to provide enough buoyancy to ball float in housing, this moment, ball float fell, aperture A on the tube wall that ball float below the ball float is taken over and the aperture B of drainage tube tube wall can be to getting up, and both communicate, and the interior liquid of housing can flow into drainage tube like this, back down ball check valve through the drainage tube outflow, take over through pump and to be injected in the stripping pump, under the big operating mode of air content, for stripping pump provides enough lubricated, and then guarantee that the omnidistance security of operation of stripping system is normal.
Emptying sweeping device of the present invention adopts lobed rotor pump as stripping pump, and its stronger suction capacity can realize drawing the function of oil and sweeping; Bigger flow makes it can be used as main pump to carry out emptying; Only can finish with a pump and unload the operation of the full section of groove.Consider when the medium air content is big, stripping pump is prone to the problem of lack of lubrication, suction capacity decline, adopt lobed rotor pump and the symphyogenetic form of gas-liquid separation device, wherein, gas-liquid separation device should store a certain amount of fluid in advance before each the use.Drawing the oil stage, air in the main pump drainage pipeline of stripping pump, be in dried operating condition, this moment, gas entered gas-liquid separation device, and its backflow functionality is opened, and liquid storage flow to the lobed rotor pump entrance side in the device, rotate with the lobe pump rotor, in pump, form oil film, for pump provides lubricated and fluid-tight, improved the suction capacity of pump; In the emptying stage, the medium air content is lower, and the gas-liquid separation device backflow functionality is closed, and guarantees not exist in the system insignificant interior circulation, has guaranteed the operating efficiency of system; In the sweeping stage, along with the decline of liquid level in the oil tank, air content increases gradually in the medium, and when gas liquid ratio reached certain value, the gas-liquid separation device backflow functionality was opened again, and the liquid storage amount can the holding pump operate as normal be finished to unloading the groove operation in the device.
Consider handled easily, adopt reducing motor driving cam impeller pump, Flow-rate adjustment is flexible, has strengthened the adaptive capacity of unit to different operating modes, and easily has been automated control.
Emptying sweeping device integrated level height of the present invention, floor space is little, small investment, operational efficiency and reliability height.Can use separately, also can incorporate other system into and use.Unit is convenient to make packaged type, is easy to fitting operation.
Description of drawings
Fig. 1 is the perspective view of gas-liquid separation device of the present invention.
Fig. 2 is the internal structure schematic diagram of gas-liquid separation device of the present invention.
Fig. 3 is the A-A cutaway view among Fig. 2.
Fig. 4 is the B-B cutaway view among Fig. 2.
Fig. 5 is the enlarged drawing at A place among Fig. 3.
Fig. 6 is the perspective view of sweeping device of the present invention.
Fig. 7 is the structural representation of stripping pump of the present invention.
Fig. 8 is the perspective view of the lobe pump rotor of stripping pump of the present invention.
Fig. 9 is the generalized section (roller is not installed) of lobe pump rotor.
Figure 10 is the generalized section (roller has been installed) of lobe pump rotor.
Figure 11 is the schematic cross-section of lobe pump rotor.
Figure 12 is the structural representation of roller.
Figure 13 is the side view of Figure 12.
Figure 14 is the C-C cutaway view of Figure 13.
Figure 15 is the another kind of structural representation of roller.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
As Fig. 1-3, automatic gas-liquid separates and the backflow integrating device comprises housing 31, helix tube 32, bolter 33, drainage tube 34, ball float 35, ball float adapter 36 and ball check valve 30, helix tube 32 is installed on the housing 31, stretch out from housing 31 at its two ends, one end connects stripping pump outlet 422 as gas-liquid separation device import 39, the other end connects downstream pipeline (pipeline that namely leads to oil store or oil tank) as gas-liquid separation device outlet 37, bolter 33 is arranged on housing 31 inside, and be enclosed within helix tube 32 outsides, the inboard two ends of bolter 33 arrange support ring 57, two ends, the outside arrange the ring 58 that is locked, and the ring 58 that is locked is fastening by interior hexagonal cylinder screw 59.
The gas-liquid separation of present embodiment and backflow integrating device can be used in the device of all gases and fluid separation applications, for example be used in the emptying sweeping device, gas-liquid separation and the backflow integrating device 3 of introducing present embodiment below in detail make up the emptying sweeping device that the back forms with stripping pump 4, as shown in Figure 6, emptying sweeping device, comprise stripping pump 4, reducing motor 1, gas-liquid separation and backflow integrating device 3, reducing motor 1 is connected with stripping pump 4 by shaft coupling, stripping pump 4, after installing, reducing motor 1 and gas-liquid separation and backflow integrating device 3 can be fixed on the mobile foundation 2, make packaged type like this, be easy to fitting operation; As Fig. 3,7, stripping pump 4 is lobed rotor pumps, and the outlet 422 of stripping pump 4 communicates with the entrance 39 of gas-liquid separation and backflow integrating device 3, and its pump housing entrance side is offered return port 7, and return port 7 communicates with the return line 11 of gas-liquid separation device 3.
As Fig. 7, Fig. 8, Fig. 9, Figure 10, stripping pump 4 comprises the pump housing 401, be provided with two lobe pump rotors 402 in the pump housing 401, lobe pump rotor 402 is provided with four columned blades 40, blade 40 tops are provided with roller mounting groove 420 and rotor drainage trough 403, roller axle 412 is fixedly arranged in the roller mounting groove 420, roller axle 412 two ends are fixed on the blade by axial pad 424, roller 405 is being installed under the supporting of sliding bearing 425 on the roller axle 412, roller pad 426 is installed on the roller axle 412, and be positioned at the two ends of roller 405, fixing spacing by roller pad tightening pin 427.Roller pad 407 is provided with roller pad drainage trough 404, and the inboard of roller mounting groove 420 is provided with balance oil storage tank 406, and balance oil storage tank 406 communicates with rotor drainage trough 403 by roller pad drainage trough 404.
During the rotor rotation, roller 405 will be thrown out of under action of centrifugal force, and the roller top exceeds rotor surface, replace rotor to wear and tear in the work, the roller 405 that is thrown out of has simultaneously reduced the radial clearance between rotor and stator and rotor and rotor, has played the effect of radial compensation.Hydraulic medium flow to the balance oil storage tank 406 of roller 405 dorsal parts through rotor drainage trough 403 and roller pad drainage trough 404, the hydraulic medium of savings can provide lubricated fully for roller 405 in the balance oil storage tank, simultaneously medium acts on hydraulic coupling on the roller 405 sub-drainage trough place medium of can partial equilibrium turning round and acts on hydraulic coupling on the roller 405 in the balance oil storage tank, prevents roller 405 eccentric wears.
As Figure 12-14, the surface of roller 405 arranges bin 413, bin 413 can bar-shaped trough or netted groove etc. different shape, bin can play the effect of oil storage, storage bits at work, make the easier formation oil film of roller surface, further reduce the rate of depreciation of combined rotor, improved it to the high adaptability for working condition of medium air content.
As Figure 15, be the another kind of structure of roller, the bin 413 of roller surface is netted groove.
The emptying sweeping device course of work is as follows, the import 423 of stripping pump 4 is connected to pipeline on the oil tank that needs emptying, gas-liquid separation device outlet 37 connects downstream pipeline (pipeline that namely leads to oil store or oil tank), start reducing motor 2 then and drive stripping pump 4, lobe pump rotor 402 in the pump housing 401 rotates and begins to draw oil, draw the oil stage incipient, stripping pump mainly is the air in the pump drainage pipeline, be in dried operating condition, this moment, gas entered gas-liquid separation device, a part of fluid owing in gas-liquid separation device, prestore in advance, after so gas enters gas-liquid separation device, its backflow functionality is opened, liquid storage flow to the cam follower pump intake in the device, rotate with the lobe pump rotor, in pump, form oil film, for pump provides lubricated and fluid-tight, improved the suction capacity of pump, along with being rotated further of lobed rotor pump, oil in the oil tank will be inhaled by impeller pump always, oil enters in the gas-liquid separation device by helix tube 32 from rotor delivery side of pump 422, the upper end of helix tube 32 has a plurality of jet orifices 55, when the fluid that has a certain pressure is flowed through helix tube 32, can be injected into bolter 33 through jet orifice 55, and jet orifice 55 is offered angle can guarantee that fluid tangentially is sprayed onto bolter, make fluid screw on bolter, increase disengaging time, offer aperture on the bolter 33 like this, pressure fluid (gas-liquid mixed) is in the bolter spiral separation.Lower in emptying process medium air content, liquid level is higher, whole ball float 35 is immersed in the liquid, ball float 35 can float, aperture A53 on the tube wall of ball float adapter 36 and the aperture B54 of drainage tube 34 tube walls are sorry next, both do not communicate, and liquid can't flow out through drainage tube 34 in the housing like this, and backflow functionality is closed.
Oil in oil tank is constantly discharged by stripping pump, when the oil in the oil tank is lower than certain liquid level, namely in the sweeping stage, decline along with liquid level in the oil tank, air content increases gradually in the medium, when gas liquid ratio reaches certain value, the liquid-tight degree of housing internal memory decreases, fluid density is low to moderate and is not enough to provide enough buoyancy to ball float 35 in housing, this moment, ball float 35 fell, ball floats below the ball float 35 are taken over the aperture B54 of aperture A53 and drainage tube 34 tube walls on 36 the tube wall can be to getting up, and both communicate, and the interior liquid of housing can flow into drainage tube 34 like this, back down ball check valve 30 through drainage tube 34 outflows, take over 60 through pump and be injected in the stripping pump, under the big operating mode of air content, for stripping pump provides enough lubricated, and then guarantee that the omnidistance security of operation of stripping system is normal.
Claims (5)
1. an automatic gas-liquid separates and the backflow integrating device, it is characterized in that, comprise housing (31), helix tube (32), bolter (33), drainage tube (34), ball float (35), ball float is taken over (36) and ball check valve (30), helix tube (32) is installed on the housing (31), stretch out from housing (31) at its two ends, one end is as gas-liquid separation device import (39), the other end is as gas-liquid separation device outlet (37), bolter (33) is arranged on housing (31) inside, and be enclosed within outside the helix tube (32), drainage tube (34) is drawn from housing (31) lower end, the one end is positioned at housing (31) inside, the other end is connected to the stripping pump entrance through ball check valve (30), ball float (35) is arranged in the housing (31), and be positioned at drainage tube (34) top, ball float is taken over (36) and is fixed on ball float (35) lower end, and is enclosed within on the drainage tube (34).
2. a kind of automatic gas-liquid according to claim 1 separates and the backflow integrating device, it is characterized in that, described ball float (35) top is provided with ball float position-limiting tube (51), and the below is provided with ball float limiting plate (52).
3. a kind of automatic gas-liquid according to claim 1 separates and the backflow integrating device, it is characterized in that the upper end of described helix tube (32) has a plurality of jet orifices (55).
4. a kind of automatic gas-liquid according to claim 3 separates and the backflow integrating device, it is characterized in that, have some aperture A(53 on the tube wall of described ball float adapter (36)), have some aperture B(54 on drainage tube (34) tube wall), make aperture A(53 after ball float (35) sinks) with aperture B(54) communicate.
5. an emptying sweeping device is characterized in that, comprises that the described automatic gas-liquid of the arbitrary claim of claim 1-4 separates and the backflow integrating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169709.XA CN103285669B (en) | 2013-05-09 | 2013-05-09 | Automatic gas-liquid separation and backflow integrated device and oil discharge stripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310169709.XA CN103285669B (en) | 2013-05-09 | 2013-05-09 | Automatic gas-liquid separation and backflow integrated device and oil discharge stripping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103285669A true CN103285669A (en) | 2013-09-11 |
| CN103285669B CN103285669B (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310169709.XA Expired - Fee Related CN103285669B (en) | 2013-05-09 | 2013-05-09 | Automatic gas-liquid separation and backflow integrated device and oil discharge stripping device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938160A (en) * | 2015-10-26 | 2017-07-11 | J.施迈茨有限公司 | For separating method and separator comprising the liquid in gaseous fluid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139740A (en) * | 1995-06-30 | 1997-01-08 | 龙野机电技术股份公司 | Gas and liquid separator for pump set |
| WO2005008071A2 (en) * | 2003-07-18 | 2005-01-27 | Varisco Spa | Gas-liquid separator for pumping systems |
| CN101053723A (en) * | 2006-08-07 | 2007-10-17 | 房师礼 | Self controlled high efficient gas and liquid separator |
| CN101108597A (en) * | 2006-07-21 | 2008-01-23 | 沈阳市耐蚀合金泵厂 | Automatic controlled discharging stripping pump device of tank car |
| CN102671469A (en) * | 2012-04-25 | 2012-09-19 | 任文建 | Centrifugal gas-liquid separator |
| CN202545272U (en) * | 2012-03-26 | 2012-11-21 | 上海石油天然气有限公司 | Automatic self-priming centrifugal pump device |
-
2013
- 2013-05-09 CN CN201310169709.XA patent/CN103285669B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139740A (en) * | 1995-06-30 | 1997-01-08 | 龙野机电技术股份公司 | Gas and liquid separator for pump set |
| WO2005008071A2 (en) * | 2003-07-18 | 2005-01-27 | Varisco Spa | Gas-liquid separator for pumping systems |
| CN101108597A (en) * | 2006-07-21 | 2008-01-23 | 沈阳市耐蚀合金泵厂 | Automatic controlled discharging stripping pump device of tank car |
| CN101053723A (en) * | 2006-08-07 | 2007-10-17 | 房师礼 | Self controlled high efficient gas and liquid separator |
| CN202545272U (en) * | 2012-03-26 | 2012-11-21 | 上海石油天然气有限公司 | Automatic self-priming centrifugal pump device |
| CN102671469A (en) * | 2012-04-25 | 2012-09-19 | 任文建 | Centrifugal gas-liquid separator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938160A (en) * | 2015-10-26 | 2017-07-11 | J.施迈茨有限公司 | For separating method and separator comprising the liquid in gaseous fluid |
| CN106938160B (en) * | 2015-10-26 | 2020-07-28 | J.施迈茨有限公司 | Method for separating liquid from a fluid comprising gas and separation device |
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| CN103285669B (en) | 2015-05-06 |
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