CN117780636B - Proportional quantitative liquid feedback device applied to single-screw oil-gas mixed delivery pump - Google Patents
Proportional quantitative liquid feedback device applied to single-screw oil-gas mixed delivery pump Download PDFInfo
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- CN117780636B CN117780636B CN202410204806.6A CN202410204806A CN117780636B CN 117780636 B CN117780636 B CN 117780636B CN 202410204806 A CN202410204806 A CN 202410204806A CN 117780636 B CN117780636 B CN 117780636B
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- 239000007788 liquid Substances 0.000 title claims abstract description 224
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 64
- 238000005086 pumping Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of mixed medium conveying devices, and particularly discloses a proportional quantitative liquid feedback device applied to a single-screw oil-gas mixed conveying pump, which comprises the single-screw oil-gas mixed conveying pump, a liquid storage tank and a liquid feedback device, wherein the liquid feedback device is arranged in the liquid storage tank and is connected with a power shaft of the single-screw oil-gas mixed conveying pump through a middle runner connecting rod, a rotor end joint shaft and a universal shaft, and the rotor end joint shaft is arranged at the end part of a hollow rotor of the single-screw oil-gas mixed conveying pump; the ball head linkage reversing valve guide pipe is provided with a first flow passage and a second flow passage which are vertically separated, the first flow passage is communicated with the inner cavity of the hollow rotor, the second flow passage is disconnected or communicated with the liquid accumulation tank, and the second flow passage is communicated or disconnected with the first flow passage; the liquid feedback device is provided with a feedback liquid reserve chamber and a liquid communication chamber which are vertically isolated, wherein the feedback liquid reserve chamber is communicated with the second flow passage, and the liquid communication chamber is communicated with the liquid storage tank. The invention can actively control the flow of feedback liquid and improve the pump efficiency.
Description
Technical Field
The invention relates to the technical field of mixed medium conveying devices, in particular to a proportional quantitative liquid feedback device applied to a single-screw oil-gas mixed conveying pump.
Background
In the oil and gas exploitation and transportation operation of an oil field, the mixed medium of petroleum and natural gas from a wellhead is required to be transported to a joint station which is several kilometers away, and a single screw oil and gas mixed transportation pump is commonly used for transportation at present. The rotor and the stator of the single screw oil-gas mixing pump have relative sliding, so that a gap exists between the rotor and the stator, the rubber stator can deform and generate gaps due to the influence of large torque acting force during operation, high-pressure gas at the outlet end of the pump can back flow to the input end through the gaps, the efficiency of the pump is greatly reduced, particularly when the gas-liquid ratio is high, a large amount of gas is repeatedly compressed and accumulated in the pump body to form high temperature, the rubber stator is easy to burn out due to early aging under the working condition of high Wen Ganmo, the power consumption is high, the service life of the pump is also seriously shortened, and the petroleum exploitation and transportation cost of natural gas in an oil field is improved.
In the prior art, publication number isThe Chinese patent of Y discloses a liquid circulation type screw oil-gas mixed transportation pump, a container with an output port is arranged at the outlet end of the screw pump, a flow limiting nozzle and a feedback pipe are connected between the bottom of the container and a pump suction cavity, so that a small amount of liquid always circulates from the suction cavity of the screw pump to the container in a working state, and the rotor and the stator of the pump are immersed, thereby improving the sealing performance of the joint of the rotor and the stator, and increasing the flow resistance by adding a flow limiting nozzle on a feedback liquid flow channel so as to limit a large amount of feedback liquid to return to the suction cavity of the pump.
However, this method is passive, and cannot actively control the flow of the feedback liquid, and there are two problems: firstly, the viscosity of pumped liquid is different (different blocks, even the mixed medium components of different well positions of the same block are different, so that the viscosity difference is large), so that the flow rate through a flow limiting nozzle is different, when the viscosity of the liquid is too large, the flow rate of feedback liquid is smaller, the sealing and lubrication requirements cannot be met, and when the viscosity of the liquid is too small, the flow rate of the feedback liquid is too large, and the pump efficiency is reduced; secondly, the pumping pressure is different (the conveying distance is far and near, the pumping pressure can be generally between 1MPa and 5 MPa), so that the flow rate of the feedback liquid passing through the flow limiting nozzle is also different, the pump efficiency is reduced when the flow rate is too large, the sealing lubrication is deteriorated when the flow rate is too small, and the pump efficiency is also reduced; in addition, arrange the feedback pipeline outside the pump body, under cold environment, when the pump maintenance is stopped, the moisture that gathers in the feedback pipeline that exposes can freeze and block up, and feedback liquid can't carry after restarting the pump to lose the effect.
Therefore, providing a proportional quantitative liquid feedback device for improving the pump efficiency and being applied to a single-screw oil-gas mixing pump is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a proportional quantitative liquid feedback device applied to a single-screw oil-gas mixing and conveying pump, which can actively control the flow of feedback liquid, so that the single-screw oil-gas mixing and conveying pump can reliably and efficiently convey a mixed medium with high gas-liquid ratio.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the proportional quantitative liquid feedback device applied to the single-screw oil-gas mixed transmission pump comprises the single-screw oil-gas mixed transmission pump and a liquid storage tank which are integrally connected and communicated, and further comprises a liquid feedback device, wherein the liquid feedback device is arranged in the liquid storage tank and is connected with a power shaft of the single-screw oil-gas mixed transmission pump through a middle runner connecting rod, a rotor end joint linkage shaft and a universal shaft, and the rotor end joint linkage shaft is arranged at the end part of a hollow rotor of the single-screw oil-gas mixed transmission pump so as to drive a ball joint linkage reversing valve guide pipe of the liquid feedback device to move up and down; the ball head linkage reversing valve guide pipe is provided with a first flow passage and a second flow passage which are vertically separated, the first flow passage is communicated with the inner cavity of the hollow rotor, the second flow passage is disconnected or communicated with the liquid accumulation tank, and correspondingly, the second flow passage is communicated or disconnected with the first flow passage; the liquid feedback device is provided with a feedback liquid storage chamber and a liquid communication chamber which are isolated from each other up and down, the feedback liquid storage chamber is communicated with the second flow passage, and the liquid communication chamber is communicated with the inside of the liquid storage tank;
The liquid feedback device comprises a liquid feedback device shell, a piston and a piston return spring, wherein the bottom of the liquid feedback device shell is fixed on the bottom wall of the liquid storage tank; the ball head linkage reversing valve guide pipe is positioned in the liquid feedback device shell, the top of the ball head linkage reversing valve guide pipe extends out of the liquid feedback device shell, and the ball head linkage reversing valve guide pipe is in sliding connection with the liquid feedback device shell; the piston is positioned between the liquid feedback device shell and the ball head linkage reversing valve guide pipe so as to form the feedback liquid storage chamber between the top wall of the liquid feedback device shell and the top wall of the piston, and the liquid communication chamber is formed between the bottom wall of the liquid feedback device shell and the bottom wall of the piston; the liquid communication chamber is communicated with the inside of the liquid storage tank through a hole on the side surface of the bottom of the liquid feedback device shell; the piston is respectively connected with the liquid feedback device shell and the ball head linkage reversing valve guide pipe in a sliding way; the piston return spring is sleeved on the ball head linkage reversing valve guide pipe, and the upper end and the lower end of the piston return spring are respectively abutted with the top wall of the liquid feedback device shell and the piston.
By adopting the technical scheme, the invention has the beneficial effects that:
Through the rotation of the hollow rotor, the up-and-down motion of the ball head linkage reversing valve guide pipe is driven under the action of the rotor end linkage shaft and the middle runner connecting rod to change the connection or disconnection state of each runner, so that the gap between the hollow rotor and the oil-gas mixed transmission pump stator of the single-screw oil-gas mixed transmission pump is always filled with liquid, the active control of the feedback liquid flow is realized, namely the feedback liquid flow is only in proportional relation with the rotating speed of the hollow rotor, the viscosity and the pumping pressure of pumping liquid are not influenced, the feedback liquid flow can be maintained at ideal values, the sealing and lubrication effects are good, and the pumping efficiency is high.
Further, the side surface of the lower end of the first flow channel is provided with a liquid diversion valve hole; the side surface of the second flow channel is provided with a reversing valve hole, a feedback liquid storage chamber diversion hole and a feedback liquid inlet valve hole in sequence from top to bottom; the first flow channel is communicated with the top flow cavity of the liquid feedback device shell through the liquid diversion valve hole; the second flow passage is separated from the circulation cavity or communicated with the reversing valve hole; the second flow passage is communicated with the feedback liquid reserve chamber through the reversing valve hole and the feedback liquid reserve chamber diversion hole, or the second flow passage is communicated with the feedback liquid reserve chamber through the feedback liquid reserve chamber diversion hole; the feedback liquid inlet valve hole is communicated with or disconnected from the inside of the liquid storage tank.
Further, the rotor end joint shaft is arranged at the output end part of the hollow rotor, one end of the rotor end joint shaft is fixedly connected with the universal shaft, the other end of the rotor end joint shaft is sleeved in the upper end of the middle runner connecting rod, a joint shaft liquid internal runner is arranged in the rotor end joint shaft, and the joint shaft liquid internal runner is communicated with the inner cavity of the hollow rotor through a side surface opening of the rotor end joint shaft, which is close to one end of the universal shaft; the bottom of the middle runner connecting rod is hinged with a ball head at the top end of the ball head linkage reversing valve guide pipe; the middle runner connecting rod is internally provided with a middle runner which is respectively communicated with the inner runner of the linkage shaft liquid and the first runner.
Further, the single-screw oil-gas mixed delivery pump comprises an oil-gas mixed delivery pump body and an oil-gas mixed delivery pump stator, and the oil-gas mixed delivery pump body is connected with the liquid storage tank into a whole and communicated with the liquid storage tank; the oil-gas mixing pump body is provided with an oil-gas mixing pump inlet and an oil-gas mixing pump outlet, the oil-gas mixing pump inlet is communicated with the inner cavity of the hollow rotor, and the oil-gas mixing pump outlet is communicated with the inside of the liquid storage tank; the oil-gas mixing pump stator is arranged inside the oil-gas mixing pump body, and the hollow rotor is arranged inside the oil-gas mixing pump stator, so that the hollow rotor performs eccentric rotary motion relative to the oil-gas mixing pump stator to convey the oil-gas mixture.
Further, the universal shaft is a flexible universal shaft.
Therefore, the invention provides a proportional quantitative liquid feedback device applied to a single-screw oil-gas mixing and conveying pump, and compared with the prior art, the proportional quantitative liquid feedback device comprises: 1) The method has the advantages that the feedback liquid flow is actively controlled, the feedback liquid flow is only in proportional relation with the rotating speed of the hollow rotor, the influence of the viscosity and the pumping pressure of pumping liquid is avoided, the feedback liquid flow can be maintained at an ideal value, the sealing and lubricating effects are good, and the pumping efficiency is high; 2) The feedback liquid flow channel is arranged inside the pump body, and the feedback liquid flow channel is ensured not to be frozen and blocked by utilizing the heat preservation effect of the pump and the heat generated during the operation of the pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a proportional quantitative liquid feedback device applied to a single screw oil-gas mixing pump according to the present invention;
FIG. 2 is a schematic diagram of a liquid feedback device according to the present invention;
FIG. 3 is a schematic structural view of a ball head linkage reversing valve guide pipe provided by the invention;
FIG. 4 is a schematic diagram of the liquid feedback device when the hollow rotor moves to the top dead center;
FIG. 5 is a schematic diagram showing the structure of the liquid feedback device when the hollow rotor moves to the bottom dead center.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-5, the embodiment of the invention discloses a proportional quantitative liquid feedback device applied to a single-screw oil-gas mixing pump, which comprises a single-screw oil-gas mixing pump 1 and a liquid storage tank 2 which are integrally connected and communicated, and further comprises a liquid feedback device 3, wherein the liquid feedback device 3 is arranged in the liquid storage tank 2, the liquid feedback device 3 is connected with a power shaft of the single-screw oil-gas mixing pump 1 through a middle runner connecting rod 4, a rotor end joint shaft 5 and a universal shaft 6, and the rotor end joint shaft 5 is arranged at the end part of a hollow rotor 11 of the single-screw oil-gas mixing pump 1 so as to drive a ball joint linkage reversing valve guide pipe 31 of the liquid feedback device 3 to move up and down; the ball-head linkage reversing valve guide pipe 31 is provided with a first flow passage 311 and a second flow passage 312 which are vertically separated, the first flow passage 311 is communicated with the inner cavity of the hollow rotor 11, the second flow passage 312 is disconnected or communicated with the liquid accumulation tank 2, and the second flow passage 312 is correspondingly communicated or disconnected with the first flow passage 311; the liquid feedback device 3 has a feedback liquid reserve chamber 32 and a liquid communication chamber 33 which are vertically isolated, the feedback liquid reserve chamber 32 communicates with the second flow passage 312, and the liquid communication chamber 33 communicates with the inside of the liquid reservoir tank 2; the liquid feedback device 3 comprises a liquid feedback device shell 34, a piston 35 and a piston return spring 36, wherein the bottom of the liquid feedback device shell 34 is fixed on the bottom wall of the liquid storage tank 2; the ball-head linkage reversing valve guide pipe 31 is positioned inside the liquid feedback device shell 34, the top of the ball-head linkage reversing valve guide pipe extends out of the liquid feedback device shell 34, and the ball-head linkage reversing valve guide pipe 31 is in sliding connection with the liquid feedback device shell 34; the piston 35 is positioned between the liquid feedback device housing 34 and the ball head linkage reversing valve guide pipe 31 to form a feedback liquid storage chamber 32 between the top wall of the liquid feedback device housing 34 and the top wall of the piston 35, and a liquid communication chamber 33 is formed between the bottom wall of the liquid feedback device housing 34 and the bottom wall of the piston 35; the liquid communication chamber 33 communicates with the inside of the liquid reservoir tank 2 through a hole in the bottom side face of the liquid feedback device housing 34; the piston 35 is respectively connected with the liquid feedback device shell 34 and the ball head linkage reversing valve guide pipe 31 in a sliding way; the piston return spring 36 is sleeved on the ball head linkage reversing valve guide pipe 31, and the upper end and the lower end of the piston return spring 36 are respectively abutted with the top wall of the liquid feedback device shell 34 and the piston 35. According to the invention, through the rotation of the hollow rotor 11, the up-and-down motion of the ball head linkage reversing valve guide pipe 31 is driven under the action of the rotor end linkage shaft 5 and the middle runner connecting rod 4 to change the connection or disconnection state of each runner, so that the gap between the hollow rotor 11 and the oil-gas mixed transmission pump stator 12 of the single-screw oil-gas mixed transmission pump is always filled with liquid, the active control of the feedback liquid flow is realized, namely, the feedback liquid flow is only in proportional relation with the rotating speed of the hollow rotor 11 and is not influenced by the viscosity and the pumping pressure of pumping liquid, thereby the feedback liquid flow can be maintained at an ideal value, the sealing and lubrication effects are good, and the pumping efficiency is high.
Specifically, the side surface of the lower end of the first flow channel 311 is provided with a liquid diversion valve hole 3111; the side surface of the second flow channel 312 is provided with a reversing valve hole 3121, a feedback liquid storage chamber diversion hole 3122 and a feedback liquid inlet valve hole 3123 from top to bottom in sequence; the first flow channel 311 is communicated with the top circulation cavity 341 of the liquid feedback device shell 34 through the liquid diversion valve hole 3111; the second flow passage 312 is separated from the flow chamber 341 or communicates through the reversing valve hole 3121; the second flow passage 312 communicates with the feedback liquid reserve chamber 32 through the reversing valve hole 3121 and the feedback liquid reserve chamber flow guide hole 3122, or the second flow passage 312 communicates with the feedback liquid reserve chamber 32 through the feedback liquid reserve chamber flow guide hole 3122; the feedback liquid-feed valve hole 3123 is connected to or disconnected from the inside of the liquid reservoir tank 2.
Specifically, the rotor end joint shaft 5 is installed at the output end of the hollow rotor 11, one end of the rotor end joint shaft 5 is fixedly connected with the universal shaft 6, in this embodiment, the universal shaft 6 is a flexible universal shaft, the other end of the rotor end joint shaft 5 is sleeved in the upper end of the intermediate runner connecting rod 4, the interior of the rotor end joint shaft 5 is provided with a joint shaft liquid inner runner 51, and the joint shaft liquid inner runner 51 is communicated with the inner cavity of the hollow rotor 11 through a side opening of the rotor end joint shaft 5 near one end of the universal shaft 6; the bottom of the middle runner connecting rod 4 is hinged with a ball head at the top end of the ball head linkage reversing valve guide pipe 31; the intermediate flow path connecting rod 4 has an intermediate flow path 41 communicating with the linkage shaft liquid inner flow path 51 and the first flow path 311, respectively.
Specifically, the single-screw oil-gas mixed delivery pump 1 comprises an oil-gas mixed delivery pump body 13 and an oil-gas mixed delivery pump stator 12, wherein the oil-gas mixed delivery pump body 13 is connected with and communicated with the liquid storage tank 2 into a whole; the oil-gas mixing pump body 13 is provided with an oil-gas mixing pump inlet 131 and an oil-gas mixing pump outlet 132, the oil-gas mixing pump inlet 131 is communicated with the inner cavity of the hollow rotor 11, and the oil-gas mixing pump outlet 132 is communicated with the inside of the liquid storage tank 2; the oil-gas mixing pump stator 12 is arranged in the oil-gas mixing pump body 13, and the hollow rotor 11 is arranged in the oil-gas mixing pump stator 12, so that the hollow rotor 11 performs eccentric rotary motion relative to the oil-gas mixing pump stator 12 to convey the oil-gas mixture.
The working principle of the invention is as follows:
When the single-screw oil-gas mixing pump 1 runs, the hollow rotor 11 performs eccentric rotary motion in the oil-gas mixing pump stator 12, the rotor end joint shaft 5 moves along with the hollow rotor 11, and meanwhile drives the middle runner connecting rod 4 to perform up-and-down motion and left-and-right swing, and the ball head of the ball head joint reversing valve guide pipe 31 is hinged with the middle runner connecting rod 4, so that the ball head joint reversing valve guide pipe 31 performs up-and-down motion.
When the hollow rotor 11 moves to the top dead center, the ball head linkage reversing valve guide pipe 31 is positioned at the upper position in the liquid feedback device shell 34, at the moment, the feedback liquid inlet valve hole 3123 is contracted into the liquid feedback device shell 34, namely, is not communicated with the liquid accumulation tank 2, the feedback liquid storage chamber 32 is communicated with the oil-gas mixing pump inlet 131 through the feedback liquid storage chamber diversion hole 3122, the second flow passage 312, the reversing valve hole 3121, the circulation cavity 341, the liquid diversion valve hole 3111, the first flow passage 311, the middle flow passage 41, the inner flow passage 51 of the linkage shaft liquid, the inner cavity of the hollow rotor 11, and the upper end surface pressure of the piston 35 is the same as the pressure of the oil-gas mixing pump inlet 131, and is a low pressure area, and the lower end surface of the piston 35 is always communicated with the liquid accumulation tank 2, and is the same as the pressure of the oil-gas mixing pump outlet 132, and is a high pressure area, so that the piston 35 receives the combined force of the upper pressure and the lower pressure, overcomes the thrust of the piston return spring 36, moves upwards, the volume of the feedback liquid storage chamber 32 is reduced, and the feedback liquid stored therein is fed back to the oil-gas mixing pump 131;
When the hollow rotor 1 moves to the bottom dead center, the ball-head linkage reversing valve guide pipe 31 is positioned at the lower position in the liquid feedback device shell 34, at the moment, the feedback liquid inlet valve hole 3123 is communicated with the liquid storage tank 2, the first flow channel 311 and the second flow channel 312 are not communicated, the feedback liquid storage chamber 32 is communicated with the liquid storage tank 2 through the reversing valve hole 3121, the feedback liquid storage chamber diversion hole 3122, the second flow channel 312 and the feedback liquid inlet valve hole 3123, the upper end surface pressure and the lower end surface pressure of the piston 35 are balanced, the piston return spring 36 is reset, the piston 35 is moved downwards, the volume of the feedback liquid storage chamber 32 is increased, and the liquid stored in the liquid storage tank 2 enters the feedback liquid storage chamber 32.
The above two processes are repeated, and each turn of the hollow rotor 11 conveys a specific amount of feedback liquid, namely, the flow rate of the feedback liquid is in a proportional relation with the rotating speed of the hollow rotor 11, so that the flow rate of the feedback liquid is maintained at an ideal value, the quantitative feedback liquid can be ensured to be fed back to the inlet 131 of the oil-gas mixing pump all the time, and the feedback liquid is sucked between the hollow rotor 11 and the stator 12 of the oil-gas mixing pump along with the gas in the inlet 131 of the oil-gas mixing pump, and the gas is conveyed efficiently by virtue of the sealing property and the lubricating property of the liquid, so that the sealing and lubricating effects are good and the pump efficiency is high.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. The proportional quantitative liquid feedback device for the single-screw oil-gas mixed transportation pump comprises the single-screw oil-gas mixed transportation pump and a liquid storage tank which are integrally connected and communicated, and is characterized by further comprising a liquid feedback device, wherein the liquid feedback device is arranged in the liquid storage tank and is connected with a power shaft of the single-screw oil-gas mixed transportation pump through a middle runner connecting rod, a rotor end joint shaft and a universal shaft, and the rotor end joint shaft is arranged at the end part of a hollow rotor of the single-screw oil-gas mixed transportation pump so as to drive a ball head joint linkage reversing valve guide pipe of the liquid feedback device to move up and down; the ball head linkage reversing valve guide pipe is provided with a first flow passage and a second flow passage which are vertically separated, the first flow passage is communicated with the inner cavity of the hollow rotor, the second flow passage is disconnected or communicated with the liquid accumulation tank, and correspondingly, the second flow passage is communicated or disconnected with the first flow passage; the liquid feedback device is provided with a feedback liquid storage chamber and a liquid communication chamber which are isolated from each other up and down, the feedback liquid storage chamber is communicated with the second flow passage, and the liquid communication chamber is communicated with the inside of the liquid storage tank;
The liquid feedback device comprises a liquid feedback device shell, a piston and a piston return spring, wherein the bottom of the liquid feedback device shell is fixed on the bottom wall of the liquid storage tank; the ball head linkage reversing valve guide pipe is positioned in the liquid feedback device shell, the top of the ball head linkage reversing valve guide pipe extends out of the liquid feedback device shell, and the ball head linkage reversing valve guide pipe is in sliding connection with the liquid feedback device shell; the piston is positioned between the liquid feedback device shell and the ball head linkage reversing valve guide pipe so as to form the feedback liquid storage chamber between the top wall of the liquid feedback device shell and the top wall of the piston, and the liquid communication chamber is formed between the bottom wall of the liquid feedback device shell and the bottom wall of the piston; the liquid communication chamber is communicated with the inside of the liquid storage tank through a hole on the side surface of the bottom of the liquid feedback device shell; the piston is respectively connected with the liquid feedback device shell and the ball head linkage reversing valve guide pipe in a sliding way; the piston return spring is sleeved on the ball head linkage reversing valve guide pipe, and the upper end and the lower end of the piston return spring are respectively abutted with the top wall of the liquid feedback device shell and the piston;
The side surface of the lower end of the first flow channel is provided with a liquid diversion valve hole; the side surface of the second flow channel is provided with a reversing valve hole, a feedback liquid storage chamber diversion hole and a feedback liquid inlet valve hole in sequence from top to bottom; the first flow channel is communicated with the top flow cavity of the liquid feedback device shell through the liquid diversion valve hole; the second flow passage is separated from the circulation cavity or communicated with the reversing valve hole; the second flow passage is communicated with the feedback liquid reserve chamber through the reversing valve hole and the feedback liquid reserve chamber diversion hole, or the second flow passage is communicated with the feedback liquid reserve chamber through the feedback liquid reserve chamber diversion hole; the feedback liquid inlet valve hole is communicated with or disconnected from the inside of the liquid storage tank;
The rotor end joint shaft is arranged at the output end part of the hollow rotor, one end of the rotor end joint shaft is fixedly connected with the universal shaft, the other end of the rotor end joint shaft is sleeved in the upper end of the middle runner connecting rod, a joint shaft liquid internal runner is arranged in the rotor end joint shaft, and the joint shaft liquid internal runner is communicated with the inner cavity of the hollow rotor through a side surface opening of the rotor end joint shaft, which is close to one end of the universal shaft; the bottom of the middle runner connecting rod is hinged with a ball head at the top end of the ball head linkage reversing valve guide pipe; the middle runner connecting rod is internally provided with a middle runner which is respectively communicated with the inner runner of the linkage shaft liquid and the first runner;
The single-screw oil-gas mixing pump comprises an oil-gas mixing pump body and an oil-gas mixing pump stator, and the oil-gas mixing pump body is connected with the liquid storage tank into a whole and communicated with the liquid storage tank; the oil-gas mixing pump body is provided with an oil-gas mixing pump inlet and an oil-gas mixing pump outlet, the oil-gas mixing pump inlet is communicated with the inner cavity of the hollow rotor, and the oil-gas mixing pump outlet is communicated with the inside of the liquid storage tank; the oil-gas mixing pump stator is arranged inside the oil-gas mixing pump body, and the hollow rotor is arranged inside the oil-gas mixing pump stator, so that the hollow rotor performs eccentric rotary motion relative to the oil-gas mixing pump stator to convey the oil-gas mixture.
2. The proportional dosing liquid feedback device for a single screw oil and gas mixing pump of claim 1, wherein said cardan shaft is a flexible cardan shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410204806.6A CN117780636B (en) | 2024-02-26 | 2024-02-26 | Proportional quantitative liquid feedback device applied to single-screw oil-gas mixed delivery pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410204806.6A CN117780636B (en) | 2024-02-26 | 2024-02-26 | Proportional quantitative liquid feedback device applied to single-screw oil-gas mixed delivery pump |
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| CN117780636A CN117780636A (en) | 2024-03-29 |
| CN117780636B true CN117780636B (en) | 2024-05-03 |
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