CN113339337B - Automatic supercharging device without emission - Google Patents
Automatic supercharging device without emission Download PDFInfo
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- CN113339337B CN113339337B CN202110537766.3A CN202110537766A CN113339337B CN 113339337 B CN113339337 B CN 113339337B CN 202110537766 A CN202110537766 A CN 202110537766A CN 113339337 B CN113339337 B CN 113339337B
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- air
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- pipeline
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- gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A supercharging device or a booster pump, in particular to a supercharging device which can be used on a conveying pipeline, does not need external power and only automatically supercharges by the pressure of the pipeline and does not discharge harmful substances. The high-pressure fluid (gas or liquid) in a pipeline is introduced into a device and is used as a power source to compress air isolated from the high-pressure fluid to a set value and store the air in an air tank as an air source of other drivers. The valve has the advantages that on the basis of keeping the original control valve equipment and technology unchanged, an environment-friendly solution without emission is achieved, and the valve is practical, simple, self-operated, environment-friendly, safe, reliable and low in cost.
Description
Technical Field
The invention relates to a supercharging device or a booster pump, in particular to a supercharging device which can be used on a transport pipeline, does not need external power, automatically supercharges only depending on the pressure of the pipeline and does not discharge harmful substances.
Background
The pneumatic control valve is a control valve which takes compressed gas as a force transmission medium and drives a diaphragm or a piston to move so as to drive an interception original piece to move to achieve the adjustment effect. In operation, a pneumatic control valve requires a pressurized source of air at a pressure sufficient to provide sufficient pressure to actuate the closure element.
In industrial applications, since there are many control valves in a plant and there are other equipment or situations that require compressed air, it is common to build a unified air pump station that compresses air and delivers it to the required equipment and valves through dedicated piping. The method is not suitable for gas transmission pipelines located outdoors or occasions with too long distance, and the reasons are that the transmission distance is too long and the cost is too high. Certainly, a gas storage tank with certain pressure can be used as a gas source, but certain compressed air needs to be stored in advance, and the gas storage tank needs to be replaced or supplemented by a gas source after the gas is used, so that the gas storage tank is generally used as an emergency shutdown gas source or a temporary gas source of a valve.
Other solutions are to use a power supply. Long distance transmission and cost issues are also encountered for field applications. For flammable and explosive gases, the use of strong electricity also has the risk of explosion or requires the requirement of explosion suppression/intrinsic safety to be met, so that the result is complicated and the cost is increased. The generation of power by solar energy or wind energy is an option, but because of the instability of the two power generation modes and the difficulty in achieving the current and voltage required for driving a valve or a compressor, the power generation mode can only be used as an auxiliary power supply or a signal power supply, but not as a real driving power supply.
For a gas pipeline, especially a long-distance gas pipeline, the gas transmitted by the pipeline can be used as a driving gas source, and the function of controlling the flow or pressure is achieved by balancing the pressure difference between the upstream and the downstream of the valve and the preset spring force, so that the valve is a self-operated valve. It also has some problems such as cost, environmental protection, safety.
The defects and shortcomings of the existing self-operated valve are that 1, gas conveyed in a gas conveying pipeline directly contacts with internal parts of a valve driver, so that the corrosion is possibly caused, the service life of the parts is shortened, and the economic loss is caused; 2. during the valving process, venting will inevitably occur due to the change in volume of the actuator chamber, thereby allowing the gas in the chamber to vent to the atmosphere. This not only results in a waste of gas in the pipeline with consequent economic losses, but also has other effects. For example, gases are harmful and pollute the environment; the gas is flammable, which can bring fire hazard. For environmental reasons, more and more countries are beginning to restrict or prohibit the emission of some gases.
For the self-operated valve discharge problem, it is now common to reduce the discharge to a level that does not exceed the legal limits. The specific method is to adjust the control precision, realize not exhausting at the equilibrium point, but need to exhaust in some process of opening or closing. That is, pneumatic control valve actuators are difficult or not capable of zero emission. Even low emissions are costly, which can greatly reduce the accuracy and sensitivity of the adjustment of the control valve. There are some proposals to collect the discharged gas in a container and then burn or recycle it, but the cost of the gas consumption is increased and other problems such as the discharge of the combustion products are also caused.
Therefore, it is difficult to meet the requirements of environmental protection, safety, cost and reliability in the pressure or flow regulation or emergency shut-off in the pipeline transportation of industrial or domestic energy gases (e.g. natural gas, carbon monoxide, hydrogen, etc.).
Disclosure of Invention
In order to solve the problems of pneumatic valve driving and discharging on long-distance conveying pipelines, the invention provides a non-discharging automatic pressurizing device used as an air source of a pneumatic driver. The technical scheme adopted by the invention is as follows: the high-pressure fluid (gas or liquid) in the pipeline is introduced into a device and is used as a power source to compress air isolated from the pipeline to a set value, the air is stored in the air tank and is used as an air source of other drivers, and when the pipeline fluid needs to be discharged, the pipeline fluid is directly discharged into a downstream pipeline, so that the outward discharge of the pipeline fluid is avoided. And the compressed air can drive the valve again without discharge problem.
The invention has the advantages that the invention realizes the environmental protection solution without discharge on the basis of keeping the original control valve equipment and technology unchanged, and has the advantages of practicality, simplicity, self-force, environmental protection, safety, reliability and low cost. Specifically, the method comprises the following steps:
1. the method is practical: the pneumatic control valve is specially designed for pipeline application of the pneumatic control valve, and all functions of the pneumatic control valve, such as control accuracy and accuracy, a failure protection function and the like, are not affected.
2. Self-force: the pressure of the pipeline fluid is used as power, the automatic opening and closing are realized, and any additional power source is not needed.
3. And (3) environmental protection: the pneumatic valve really achieves the environmental protection standard without emission and the compressed air does not need to consume additional energy.
4. Safety: the safety characteristic of cooperation control valve, full mechanical full-sealed design guarantees zero leakage and failure protection, does not need the intervention of electricity, and not only environmental protection but also safety.
5. Reliable: the basic requirements of the control valve are met, the valve is fully mechanically designed, the structure is simple, maintenance is not needed, and the reliability of the actuating mechanism is greatly improved.
6. The cost is low: on the premise of not reducing the structure and control precision of the control valve, only one 'automatic supercharger' with a simple structure is added to meet all the requirements of environmental protection and safety, and the cost performance is extremely high.
Drawings
FIG. 1 is a schematic diagram of an automatic supercharging device
FIG. 2 is a schematic diagram of the position of the booster piston at the start of positive compression
FIG. 3 is a schematic diagram of the position of the piston of the supercharging device at the end of positive compression and at the time of cylinder reversal
FIG. 4 is a schematic diagram of the booster piston position at the start of reverse compression
FIG. 5 is a schematic diagram showing the position of the piston of the supercharging device at the end of reverse compression and at the time of cylinder reversal
FIG. 6 is a schematic diagram of a control valve with a zero discharge automatic booster
Detailed Description
The embodiments of the invention will be further described with reference to the accompanying drawings in which:
the principle of the automatic supercharger is shown in figure 1, a double-stage cylinder 2 is internally provided with a floating piston 1, and the piston and the cylinder form 4 air chambers A 1 、A 2 、B 1 And B 2 Separated by a seal. The action areas of the pistons corresponding to the four air chambers are respectively a 1 、a 2 、b 1 And b 2 Wherein a is 1 ＝a 2 ，b 1 ＝b 2 And a/b = m. A feedback rod 7 is connected with the floating piston 1, and one end of the feedback rod 7 is connected with a valve core of a pilot valve 8. Two air inlets of the pilot valve 8 are respectively communicated with the upstream and the downstream of the air transmission pipeline. The air inlet and the air outlet of the pneumatic control reversing valve 9 are respectively connected with the upstream and the downstream of the pipeline, and the control port and the air chamber A of the cylinder 1 And the pilot port is connected with the air outlet of the pilot valve 8. The air inlet and the air outlet of the pneumatic control reversing valve 10 are respectively connected with the upstream and the downstream of the pipeline, and the control port and the air chamber A of the cylinder 2 Connected to pilot port of direction-changing valve 9The control ports are connected. Air chamber B 1 And B 2 Check valves 3, 4 and 5, 6 are connected. For drawing air from the environment and outputting compressed air to the air reservoir 11.
The specific operation process is as follows:
as shown in fig. 2, when the air compression starts, the air inlet of the air control reversing valve 9 is communicated with the cylinder 2, and high-pressure fluid (with pressure of P) H ) Enters the air chamber A 1 (ii) a The air outlet of the pneumatic control reversing valve 10 is connected with the downstream of the pipeline (the pressure is P) L ) And is connected with the air chamber A 2 And communicating. The floating piston 1 is pushed at F = P H ×a 1 -P L ×a 2 Is moved rightwards to compress the air chamber B 2 The air in the air storage tank 11 enters through the one-way valve 4, and the air is sucked into the air chamber B through the one-way valve 6 1 Air chamber A 2 Is discharged into the conduit downstream. When air compression starts, the valve core of the pilot valve 8 is positioned at the leftmost side, the air inlet at the downstream of the connecting pipeline is communicated with the pilot port of the pneumatic control reversing valve 9, and the valve core is fixed because the acting force at the left side of the valve core of the pneumatic control reversing valve 9 is smaller than the acting force at the right side. For the pneumatic control scavenging valve 10, the pressures of the two sides of the valve core are P H The valve core maintains the air outlet and the air chamber A 2 And (4) communicating.
As shown in fig. 3, when the floating piston 1 moves to the extreme position, the feedback rod 7 pulls the valve core of the pilot valve 8 to change direction; at the moment, the air inlet of the upstream of the pilot valve 8 connecting pipeline is communicated with the pilot port of the pneumatic control reversing valve 9, and the valve core of the pneumatic control reversing valve 9 moves rightwards under the action of the right pushing force, so that the air outlet of the downstream connecting pipeline is connected with the air chamber A 1 And (4) communicating. Because the pilot port of the pneumatic control reversing valve 10 is connected with the air chamber A 1 The valve core of the pneumatic control reversing valve 10 moves rightwards under the action of a rightwards pushing force, and an air inlet connected with the upstream of the pipeline and an air chamber A are communicated with each other 2 Communicating; at F = P H ×a 2 -P L ×a 1 The thrust pushes the lower floating piston 1 to move leftwards (see figure 4), and the air chamber B is compressed 1 The air in the air storage tank 11 enters through the one-way valve 5, and the air is sucked into the air chamber B through the one-way valve 3 2 Air chamber A 1 The gas in the system is discharged into a downstream pipeline(ii) a Until the floating piston 1 moves to the leftmost end, the valve core position of the pilot valve 8 is reset through the feedback rod 7, and a cycle is completed (see fig. 5). The air is continuously pressed into the air storage tank 11 until P 0 ＝m×(P H -P L ) The dual stage in-cylinder pressures are allowed to equilibrate.
Theoretically, P 0 Can be any value, and only needs to select proper piston area ratio m. m is>1 hour P 0 Even will be higher than the upstream pressure P H But still large. The structures can be integrated into a whole so as to reduce the volume and can be flexibly and conveniently combined by the monomer according to the actual situation.
The supercharging device can be used as a power source of a valve driver. As shown in fig. 6, the upstream to downstream regulated conditions are taken as an example, and flow and failure modes (e.g., fail-off) are set. The gas at the upstream and downstream of the pipeline is respectively connected with a high pressure port and a low pressure port of a pressurizing device 13, and the pressure is respectively P 1 And P 2 (P 1 >P 2 ). The air inlet of the supercharging device 13 is connected with the atmosphere, the air outlet is connected with the air storage tank 11, the pressure of the air storage tank 11 is set to be P 0 . At P 1 And P 2 Until the pressure is P, air is forced into the air tank 11 0 Until now. When the adjusting valve 16 needs to be adjusted, the controller 14 opens the inlet, and the compressed gas in the gas storage tank 11 is adjusted to the required pressure by the pressure adjusting valve 12 and then enters the gas chamber of the valve driver 15 through the controller 14 to drive the closure element to move, so as to achieve the purpose of adjustment. The pressure inside the air tank 11 is lowered by supplying air to the actuator 15, so that the pressure balance with the pressure increasing device 13 is broken, thereby causing the pressure increasing device 13 to move, and supplementing the air tank 11 with air until the air tank 11 is balanced again. Due to the unique gas path design and sealing device in the pressurizing device 13, the pipeline fluid and the driving gas are separated from each other, and the pipeline fluid can directly enter a downstream pipeline and cannot be discharged to the environment when needing to be discharged, so that pollution is avoided. The exhaust air generated by the driver 15 during the adjustment is compressed air, and therefore, does not affect the environment.
The automatic booster can also be used under the working condition with a compressed air source and used as a boosting air tank, for example, an air tank used in emergency shutdown, so that the existing air source can be utilized for boosting, the high-pressure air source is not used independently, and the cost is saved.
Claims (4)
1. A valve control system for a long distance energy source gas transportation pipeline is characterized in that: a floating piston (1) is arranged in a two-stage cylinder, the piston and the cylinder form 4 containing cavities which are isolated by sealing, wherein two air chambers are used for driving the floating piston, and the two air chambers are used for compressing air;
the valve control system for a long distance energy source gas transport pipeline further comprises: a supercharging device (13), an air storage tank (11), a pressure regulating valve (12), a controller (14), a valve driver (15) and a regulating valve (16); the regulating valve (16) is arranged on the gas conveying pipeline; the supercharging device (13) comprises a two-stage cylinder;
the air inlet of the supercharging device (13) is connected with the atmosphere, and the air outlet of the supercharging device is connected with the air storage tank (11); the gas at the upstream and the downstream of the gas transportation pipeline is respectively connected with a high pressure port and a low pressure port of the supercharging device (13), and the pressure of the high pressure port of the supercharging device (13) is greater than the pressure of the low pressure port of the supercharging device (13);
when the regulating valve (16) needs to be regulated, the controller (14) opens an inlet, and compressed gas in the gas storage tank (11) enters a gas chamber of the valve driver (15) through the controller (14) to drive an interception original member to move after being regulated to a required pressure by the pressure regulating valve (12); the pressure in the air storage tank (11) is reduced due to the fact that air is supplied to the driver (15), and the pressure in the air storage tank (11) is balanced again due to the fact that the supercharging device (13) moves to supplement air for the air storage tank (11); when the floating piston (1) moves to the extreme position, the mechanical feedback rod (7) pulls a valve core of the pilot valve (8) to change direction;
a feedback rod (7) is connected on the floating piston (1), one end of the feedback rod (7) is connected with the valve core of the pilot valve (8)(ii) a Two air inlets of the pilot valve (8) are respectively communicated with the upstream and the downstream of the gas transmission pipeline; the air inlet and the air outlet of the first pneumatic control reversing valve (9) are respectively connected with the upstream and the downstream of the pipeline, and the air outlet is connected with the air chamber A of the cylinder l The pilot port is connected with the air outlet of the pilot valve (8); the air inlet and the air outlet of the second pneumatic control reversing valve (10) are respectively connected with the upstream and the downstream of the pipeline, and the air outlet is connected with an air chamber A of the cylinder 2 And the pilot port is connected with the air outlet of the first pneumatic reversing valve (9).
2. The valve control system for long distance energy source gas transportation pipeline of claim 1 characterized by: the ratio m of the piston area of the floating piston used for driving to the piston area used for compressing determines the pressure of the compressed air, and m >1 can enable the pressure of the compressed air to be larger than the upstream pressure of the pipeline.
3. The valve control system for long distance energy gas transport pipeline of claim 1 wherein: one end of the double-stage cylinder (2) is provided with a pilot valve (8), an air inlet of the double-stage cylinder is connected with the upstream and downstream of the pipeline, a mechanical feedback rod (7) is arranged in the floating piston (1), and the feedback rod (7) is connected with a valve core of the pilot valve (8).
4. The valve control system for long distance energy source gas transportation pipeline of claim 1 characterized by: the two-stage cylinder (2) is provided with one-way valves, air chambers which are responsible for compressing air are arranged in pairs, one is used for outputting air in one direction, and the other is used for sucking air in one direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537766.3A CN113339337B (en) | 2021-05-18 | 2021-05-18 | Automatic supercharging device without emission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537766.3A CN113339337B (en) | 2021-05-18 | 2021-05-18 | Automatic supercharging device without emission |
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| Publication Number | Publication Date |
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| CN113339337A CN113339337A (en) | 2021-09-03 |
| CN113339337B true CN113339337B (en) | 2022-12-20 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114622946B (en) * | 2022-04-12 | 2023-02-07 | 南京市建设工程消防审验服务中心 | Fire fighting equipment for urban rail transit tunnel and fire fighting method based on fire fighting equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB599311A (en) * | 1943-12-03 | 1948-03-10 | Massey Machine Company | Improvements in fluid pressure operated speed governing systems |
| JPH10267002A (en) * | 1997-03-25 | 1998-10-06 | Smc Corp | Pressure booster |
| CN101025174A (en) * | 2006-02-02 | 2007-08-29 | 罗斯控制阀公司 | Dynamic fluid power monitoring system for separate actuators |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB809980A (en) * | 1956-03-21 | 1959-03-04 | Flick Reedy Corp | Actuator valve |
| CN1016089B (en) * | 1986-09-19 | 1992-04-01 | 吴明坚 | Automatic hydraulic control pressure booster |
| CN101457776A (en) * | 2008-12-23 | 2009-06-17 | 大连海事大学 | Gas-saving supercharger for utilizing thrust of compressed gas |
| CN204357806U (en) * | 2014-11-25 | 2015-05-27 | 王凤娟 | A kind of simple and easy self booster |
| CN109185239A (en) * | 2018-09-10 | 2019-01-11 | 深圳市中粤海洋能源科技有限公司 | A kind of tidal power generation pressure charging system |
| CN212079784U (en) * | 2020-04-06 | 2020-12-04 | 付世传 | Pneumatic pressure cylinder |
-
2021
- 2021-05-18 CN CN202110537766.3A patent/CN113339337B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB599311A (en) * | 1943-12-03 | 1948-03-10 | Massey Machine Company | Improvements in fluid pressure operated speed governing systems |
| JPH10267002A (en) * | 1997-03-25 | 1998-10-06 | Smc Corp | Pressure booster |
| CN101025174A (en) * | 2006-02-02 | 2007-08-29 | 罗斯控制阀公司 | Dynamic fluid power monitoring system for separate actuators |
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| CN113339337A (en) | 2021-09-03 |
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