CN105156156A - Turbine pressure reduction power device and turbine pressure reduction unit - Google Patents
Turbine pressure reduction power device and turbine pressure reduction unit Download PDFInfo
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- CN105156156A CN105156156A CN201510514638.1A CN201510514638A CN105156156A CN 105156156 A CN105156156 A CN 105156156A CN 201510514638 A CN201510514638 A CN 201510514638A CN 105156156 A CN105156156 A CN 105156156A
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Abstract
A turbine pressure reduction power device comprises a shell, a turbine, a hydraulic pump, a liquid input pipe, a liquid outlet pipe and a hydraulic motor. The shell comprises a pipeline air inlet and a pipeline air outlet. The turbine is arranged in the shell so as to be driven by pipeline air in the shell. The hydraulic pump is arranged in the shell and connected with the turbine so as to be driven by the turbine. The liquid input pipe penetrates the shell and is communicated with the hydraulic pump. The liquid output pipe penetrates the shell and is communicated with the hydraulic pump. The hydraulic motor is located outside the shell and communicated with the liquid output pipe so as to be driven by high-pressure liquid output by the liquid output pipe.
Description
Technical field
The present invention relates to a kind of power plant, particularly turbine decompression power plant and utilize turbine reduce pressure power plant as power source turbine decompression unit.
Background technique
In the prior art, have utilize pipeline gas promote turbine then drive electrical generators generating technology.In this prior art, turbine is arranged in enclosing housing, and the entrance and exit of this enclosing housing is connected with upstream line and downstream line.Generator is arranged on outside, to be connected to generate electricity by rotating shaft with turbine.Due to poor with the immense pressure outside pipeline in pipeline, therefore in enclosing housing and rotating shaft joint, there is the risk that pipeline gas leaks.The applicant is for improving this shortcoming, and once proposed a kind of puffing turbine power generation unit, its generator is also positioned at housing, because this eliminating the rotating shaft running through housing, obtains good result.But through constantly research and development, the puffing turbine power generation unit proposed before claimant thinks in addition can improvements, to simplify set structure.
Summary of the invention
In view of this, a kind of turbine decompression power plant solved the problem are proposed herein.
A kind of turbine decompression unit solved the problem also is proposed herein.
Turbine decompression power plant in this paper, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump; And
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe.
In one embodiment, described shell comprises housing main body and is mounted to the pipeline gas entrance part of described housing main body, described pipeline gas entrance part one end forms described pipeline gas entrance, the other end is the pipeline gas entrance part connecting end being connected to described housing main body, and the diameter of described pipeline gas entrance is less than the diameter of described pipeline gas entrance part connecting end.
In one embodiment, described power plant also comprise and to be contained in described shell and just to the spool of described pipeline gas entrance, and described spool moves to regulate the flow of the pipeline gas entering described turbine in the axial direction in order to the pressure of the pipeline gas according to described turbine downstream towards or away from described pipeline gas entrance.
In one embodiment, described spool comprises cone head and cylindrical connecting portion, and form input pipeline gas passage between the outer surface of described cone head and the internal surface of described pipeline gas entrance part, described cylindrical connecting portion and a cavity are slidably connected.
In one embodiment, described cone head outer surface and described pipeline gas entrance part internal surface are fairing ace.
In one embodiment, described cavity is an inner housing being positioned at described shell, described oil hydraulic pump is arranged in described inner housing, runner is formed between the outer surface of described inner housing and the internal surface of described shell, described cross section of fluid channel is long-pending equal with described input pipeline gas channel cross-sectional area, described spool is arranged on described inner housing one end near described pipeline gas entrance, and described turbine is arranged on one end that described inner housing exports near described pipeline gas.
In one embodiment, described liquid input tube and liquid output pipe and described shell are welded and fixed.
Also propose a kind of turbine decompression unit herein, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe; And
Generator, described generator is connected to be generated electricity by described fluid motor-driven with described oil hydraulic motor.
Also propose a kind of turbine decompression unit herein, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe; And
Water pump, described water pump is connected with by described fluid motor-driven with described oil hydraulic motor.
Also propose a kind of turbine decompression unit herein, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe;
Induced draft fan, the input energy sources of described induced draft fan derives from the output kinetic energy of described oil hydraulic motor; And
Heat exchanger, described heat exchanger receives the pipeline gas reduced pressure by described turbine expansion and the air stream formed by described induced draft fan makes both in described heat exchanger, carry out reverse-flow heat exchange.
In sum, the invention provides a kind of turbine decompression power plant, turbine and oil hydraulic pump are set in gas pipeline, the inherent shell of gas pipeline welds a fluid pipeline and fluid pipeline is communicated with oil hydraulic pump, therefore the problem that pipeline gas leaks is solved, and Security improves.Arrange oil hydraulic motor outside pipeline, the fluid pressure of oil hydraulic pump is converted to the mechanical energy of motor output shaft, the kinetic energy of oil hydraulic motor has multiple application, can drive electrical generators, blower fan, water pump etc., and unit is arranged at outside gas pipeline, easy for installation, cost reduces.Apply especially as one, oil hydraulic motor drives blower fan, and reverse-flow heat exchange is carried out in the air that blower fan is agitated and post-decompression combustion gas, heats, be conducive to the transmission of combustion gas to post-decompression combustion gas.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of turbine decompression power plant.
Fig. 2 is the rough schematic view of an embodiment of turbine decompression unit.
Fig. 3 is the rough schematic view of an embodiment of turbine decompression unit.
Embodiment
Before describing the embodiments in more detail, it should be understood that and the invention is not restricted to detailed construction in the application hereafter or described in accompanying drawing or arrangement of elements.The present invention can be the embodiment that alternate manner realizes.And, should be appreciated that wording used herein and term are only used as to describe purposes, should being construed as limiting property not explain.Similar wording meant and comprised item listed thereafter, its equivalent and other additional things " comprising " used herein, " comprising ", " having " etc.Particularly, when describing " certain element ", the quantity that the present invention does not limit this element is one, also can comprise multiple.
Fig. 1 is the schematic diagram of an embodiment of turbine decompression power plant.Described power plant comprise shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18 and oil hydraulic motor 20, wherein turbine 12 and oil hydraulic pump 14 are all arranged in shell 10, and turbine 12 drives with oil hydraulic pump 14 and is connected, like this, enter pipeline gas (the such as rock gas of shell 10, liquid gas etc.) promote turbine 12 rotate, then drive oil hydraulic motor 20 operate.Liquid input tube 16 passes shell 10 and is communicated with oil hydraulic pump 14, liquid output pipe 18 passes shell 10 and is communicated with oil hydraulic pump 14, it is outer and be communicated with liquid output pipe 18 that oil hydraulic motor 20 is arranged at shell 10, liquid enters oil hydraulic pump 14 from liquid input tube 16, be compressed into highly pressurised liquid through oil hydraulic pump 14 to export from liquid output pipe 18, the high pressure liquid drives oil hydraulic motor 20 of output operates.
Shell 10 comprises pipeline gas entrance 22 and pipeline gas outlet 24.Pipeline gas entrance 22 is connected with upstream line and carrys out gas to receive upstream, and pipeline gas outlet 24 is connected to export the pipeline gas after expanding to downstream with downstream line.
In the present embodiment, shell 10 comprises substantially cylindrical housing main body 26 and is mounted to the pipeline gas entrance part 28 of housing main body 26.One end 30 (calling pipeline gas entrance part connecting end 30 in the following text) of pipeline gas entrance part 28 is connected to housing main body 26, and arranges above-mentioned pipeline gas entrance 22 away from the other end of housing main body 26.Pipeline gas entrance part connecting end 30 can removably mode, and such as flange is mounted to housing main body 26.The diameter of pipeline gas entrance 22 is less than the diameter of pipeline gas entrance part connecting end 30.Preferably, pipeline gas entrance part 28 has the internal surface 32 in streamlined curved surface.
In an illustrated embodiment, turbine 12 is provided with two-stage, and one-level turbine comprises first order guider 34 and first order movable vane 36, and secondary turbine comprises second level guider 38 and second level movable vane 40.Wherein, first order guider 34 and second level guider 38 are fixed with shell 10 (such as, housing main body 26), and the outer ring of such as first order guider 34 and second level guider 38 is welded or is otherwise fixed to the internal circular surfaces of housing main body 26.First order movable vane 36 and second level movable vane 40 are fixed in a rotating shaft 42 to rotate around a running shaft under the impetus of pipeline gas.
In other embodiments, according to actual needs, turbine 12 can only arrange one-level or more than two-stage.
In an illustrated embodiment, arrange an inner housing 44 in shell 10, turbine 12 and oil hydraulic pump 14 are installed in inner housing 44, from pipe gas flow to, turbine 12 is arranged on oil hydraulic pump 14 downstream, forms runner 45 between shell 10 internal surface and inner housing 44 outer surface.Inner housing 44 at least two positions are in the axial direction fixed relative to shell 10.In the one end near pipeline gas entrance 22, liquid input tube 16 and liquid output pipe 18 are welded and fixed with shell 10, liquid input tube 16 is communicated with the oil hydraulic pump 14 in inner housing 44 with liquid output pipe 18 simultaneously, liquid input tube 16 and be also fixed relationship (being such as welded and fixed) between liquid output pipe 18 and inner housing 44, therefore, liquid input tube 16 and liquid output pipe 18 can be used as the element supporting inner housing 44; In the one end near pipeline gas outlet 24, inner housing 44 is supported by first order guider 34 and/or second level guider 38.
Above-mentioned power plant can be used in pipeline valve station (as urban gate station).Here, the pressure that gas is carried out in upstream will be lowered.The present invention utilizes pipeline gas reducing pressure after turbine expansion.In order to meet the pipeline gas pressure requirements of pipeline transmission, the pressure through the pipeline gas of turbine expansion step-down needs to maintain predetermined value.According to the diverse location of gas transmission station in whole pipeline transmission, predetermined value described herein is different.Such as, pipeline gas pressure can be depressurized to 4MPa from 10Mpa, is depressurized to 2.5MPa or is depressurized to 1.6MPa from 2.5MPa from 4MPa, and can float within the specific limits.Should be understood that, at some gas transmission stations, the pipeline gas pressure through pressure regulation can maintain other predetermined value or prespecified range.
In some cases, downstream gas consumption is constantly change, therefore can cause the pressure surge of the pipeline gas through turbine expansion step-down.In order to maintain its pressure, as shown in Figure 1, can arrange a spool 46 in turbine 12 upstream, spool 46 regulates in order to the pressure of the pipeline gas according to turbine 12 downstream the flow entering the pipeline gas of turbine 12, maintains the pipeline gas pressure after pressure regulation in predetermined value or prespecified range with this.
Spool 46 is also arranged in shell 10 also just to pipeline gas entrance 22.The outer surface of spool 46 and the internal surface 32 of shell 10 define input pipeline gas passage 48.In order to form uniform pipeline gas passage 48, spool 46 outer surface also forms fairing ace, makes the taper of spool 46 in convergent on the direction contrary with airintake direction.In certain embodiments, the sectional area of input pipeline gas passage 48 is identical in fact with the sectional area of runner 45.In certain embodiments, upstream line, input pipeline gas passage 48 are identical in fact with the sectional area of runner 45.Keep identical sectional area, can prevent pipeline gas from expanding before entering turbine as far as possible, thus improve the operational paradigm of power plant.
In the present embodiment, spool 46 can move to change the cross-section area of input pipeline gas passage 48 thus the pipeline gas flow of change input relative to turbine 12 according to the pipeline gas pressure in turbine 12 downstream, regulates the pipeline gas pressure in turbine 12 downstream with this.The movement of spool 46 can adopt various ways to realize.In an example shown, spool 46 adopts scalable design, the cylindrical slide contact part 52 comprising cone head 50 and be connected with cone head 50.This cylindrical slide contact part 52 can be slidably connected with a cavity, make cone head 50 near or away from pipeline gas entrance 22, thus reduce or increase pipeline gas flow.In an illustrated embodiment, this cavity is inner housing 44 is a part for inner housing 44 in other words.If cone head 50 moves to pipeline gas entrance 22 further, then can block pipeline gas entrance 22 completely, this will make the present invention have pipeline gas switching function.
Turbine 12 upstream and downstream can arrange pressure transducer 54,56 respectively to detect the pipeline gas pressure of turbine 12 upstream and downstream, and drives spool 46 to carry out the above-mentioned movement in order to adjust flux according to the pressure of this detection in electronic mode.
The activity of spool 46 also can adopt lever type Mechanical Driven according to the pressure in downstream.
Turbine 12 upstream and downstream also can distinguish set temperature sensor 58,60 to detect the pipeline gas temperature of turbine 12 upstream and downstream.Can calculate the flow of pipeline gas according to the pressure difference of turbine 12 upstream and downstream and temperature difference and the electricity that sends, therefore the present invention can as flowmeter.
Fig. 2 is the rough schematic view of an embodiment of turbine decompression unit.As Fig. 2, described turbine decompression unit comprises shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18, oil hydraulic motor 20 and generator 61.Wherein, the structure of shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18 and oil hydraulic motor 20 can identical with the embodiment of Fig. 1, generator 61 to be positioned at outside shell 10 and to be connected with oil hydraulic motor 20, when the running of described unit, oil hydraulic pump 14 drives oil hydraulic motor 20 to operate then to drive generator 61 to make it generate electricity.
In another embodiment, the invention provides a kind of turbine decompression unit, described turbine decompression unit comprises shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18, oil hydraulic motor 20 and water pump.Wherein, the structure of shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18 and oil hydraulic motor 20 can identical with the embodiment of Fig. 1, described water pump to be positioned at outside shell 10 and to be connected with oil hydraulic motor 20, when described unit running, oil hydraulic pump 14 drives oil hydraulic motor 20 to operate and then drives described water pump.
Fig. 3 is the rough schematic view of an embodiment of turbine decompression unit.As Fig. 3, described turbine decompression unit comprises shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18, oil hydraulic motor 20, induced draft fan 62 and heat exchanger 64.Wherein, the structure of shell 10, turbine 12, oil hydraulic pump 14, liquid input tube 16, liquid output pipe 18 and oil hydraulic motor 20 can identical with the embodiment of Fig. 1.Induced draft fan 62 is connected to be driven by oil hydraulic motor 20 with oil hydraulic motor 20, and the input energy sources of induced draft fan 62 derives from the output kinetic energy of oil hydraulic motor 20.Heat exchanger 64 one end is communicated with induced draft fan 62, and the other end is communicated with the pipeline gas after expansion.When described unit running, oil hydraulic pump 14 drives oil hydraulic motor 20 to operate, oil hydraulic motor 20 drives induced draft fan 62, after the air that induced draft fan 62 is agitated enters heat exchanger 64 and puffing and the pipeline gas entering heat exchanger 64 carries out reverse-flow heat exchange, heats to the pipeline gas after puffing.
In pipeline gas transmitting procedure, temperature is also a parameter needing to maintain in prespecified range, under some low temperature environments, often needs to heat to the pipeline gas in transmission.Pipeline gas pipeline gas after turbine decompression can expand and temperature can significantly reduce, and is unfavorable for the transmission of pipeline gas.The present invention utilizes induced draft fan 62 and heat exchanger 64, both can heat to the pipeline gas after expansion, and is beneficial to the transmission of pipeline gas, and the power source of induced draft fan 62 and heat exchanger 64 derives from turbine decompression power plant itself, realizes the maximization of using energy source.
In sum, the invention provides a kind of turbine decompression power plant, turbine and oil hydraulic pump are set in gas pipeline, the inherent shell of gas pipeline welds a fluid pipeline and fluid pipeline is communicated with oil hydraulic pump, therefore the problem that pipeline gas leaks is solved, and Security improves.Arrange oil hydraulic motor outside pipeline, the fluid pressure of oil hydraulic pump is converted to the mechanical energy of motor output shaft, the kinetic energy of oil hydraulic motor can drive electrical generators, blower fan, water pump etc., and is arranged at outside gas pipeline by unit, and easy for installation, cost reduces.Apply especially as one, oil hydraulic motor drives blower fan, and reverse-flow heat exchange is carried out in the air that blower fan is agitated and post-decompression combustion gas, heats, be conducive to the transmission of combustion gas to post-decompression combustion gas.
Concept described herein may be embodied to other form when not departing from its spirit and characteristic.Disclosed specific embodiment should be regarded as exemplary instead of restrictive.Therefore, scope of the present invention is by appended claim, instead of determines according to these descriptions before.Any change in the letter and equivalency range of claim all should belong to the scope of these claims.
Claims (10)
1. turbine decompression power plant, is characterized in that, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump; And
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe.
2. turbine decompression power plant as claimed in claim 1, it is characterized in that, described shell comprises housing main body and is mounted to the pipeline gas entrance part of described housing main body, described pipeline gas entrance part one end forms described pipeline gas entrance, the other end is the pipeline gas entrance part connecting end being connected to described housing main body, and the diameter of described pipeline gas entrance is less than the diameter of described pipeline gas entrance part connecting end.
3. turbine decompression power plant as claimed in claim 2, it is characterized in that, described power plant also comprise and to be contained in described shell and just to the spool of described pipeline gas entrance, and described spool moves to regulate the flow of the pipeline gas entering described turbine in the axial direction in order to the pressure of the pipeline gas according to described turbine downstream towards or away from described pipeline gas entrance.
4. turbine decompression power plant as claimed in claim 3, it is characterized in that, described spool comprises cone head and cylindrical connecting portion, form input pipeline gas passage between the outer surface of described cone head and the internal surface of described pipeline gas entrance part, described cylindrical connecting portion and a cavity are slidably connected.
5. turbine decompression power plant as claimed in claim 4, it is characterized in that, described cone head outer surface and described pipeline gas entrance part internal surface are fairing ace.
6. turbine decompression power plant as claimed in claim 4, it is characterized in that, described cavity is an inner housing being positioned at described shell, described oil hydraulic pump is arranged in described inner housing, runner is formed between the outer surface of described inner housing and the internal surface of described shell, described cross section of fluid channel is long-pending equal with described input pipeline gas channel cross-sectional area, described spool is arranged on described inner housing one end near described pipeline gas entrance, and described turbine is arranged on one end that described inner housing exports near described pipeline gas.
7. turbine decompression power plant as claimed in claim 1, is characterized in that, described liquid input tube and liquid output pipe and described shell are welded and fixed.
8. a turbine decompression unit, is characterized in that, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe; And
Generator, described generator is connected to be generated electricity by described fluid motor-driven with described oil hydraulic motor.
9. a turbine decompression unit, is characterized in that, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe; And
Water pump, described water pump is connected with by described fluid motor-driven with described oil hydraulic motor.
10. a turbine decompression unit, is characterized in that, comprising:
Shell, described shell comprises pipeline gas entrance and pipeline gas outlet;
Turbine, described turbine is arranged in described shell to be driven by the pipeline gas in described shell;
Oil hydraulic pump, described oil hydraulic pump to be arranged in described shell and to be connected to be driven by described turbine with described turbine;
Liquid input tube, described liquid input tube passes described shell and is communicated with described oil hydraulic pump;
Liquid output pipe, described liquid output pipe passes described shell and is communicated with described liquor pump;
Oil hydraulic motor, described oil hydraulic motor to be positioned at outside described shell and to be communicated with the high pressure liquid drives exported by described liquid output pipe with described liquid output pipe;
Induced draft fan, the input energy sources of described induced draft fan derives from the output kinetic energy of described oil hydraulic motor; And
Heat exchanger, described heat exchanger receives the pipeline gas reduced pressure by described turbine expansion and the air stream formed by described induced draft fan makes both in described heat exchanger, carry out reverse-flow heat exchange.
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| CN201510514638.1A CN105156156B (en) | 2015-08-20 | 2015-08-20 | Turbine decompression power set and turbine decompression unit |
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| CN201510514638.1A CN105156156B (en) | 2015-08-20 | 2015-08-20 | Turbine decompression power set and turbine decompression unit |
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| CN105156156B CN105156156B (en) | 2017-03-29 |
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| CN108730772A (en) * | 2018-06-14 | 2018-11-02 | 重庆科技学院 | One kind being used for the recoverable fluid pressure type energy taking device of natural gas line overbottom pressure |
| CN108843846A (en) * | 2018-08-28 | 2018-11-20 | 西安工程大学 | A kind of hot water pressure reducing valve based on ultrasound |
| CN108868904A (en) * | 2018-06-14 | 2018-11-23 | 重庆科技学院 | It is a kind of for recycling the hydraulic variable motor speed-regulating system of natural gas remaining energy |
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| Publication number | Publication date |
|---|---|
| CN105156156B (en) | 2017-03-29 |
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