CN111720733A - Intelligent pressurization system for liquefied natural gas supply module assembly - Google Patents

Abstract

The invention discloses an intelligent pressurization system for a liquefied natural gas supply module assembly in the technical field of LNG, which comprises a gas cylinder, a gas outlet pipe, an economic valve, a gas phase pipe, a gas return valve, a pressure sensor, a pressurization pipe, a pressurization stop valve, a pressurization regulating valve, a finned pipe, a pressurization pump and an ECU (electronic control unit), wherein the gas cylinder is respectively connected with the gas outlet pipe, the gas phase pipe and the pressurization pipe, the gas outlet pipe is transversely arranged on the gas cylinder, the economic valve is arranged between the gas phase pipe and the gas outlet pipe, one end of the gas outlet pipe is positioned at the bottom of an inner cavity of the gas cylinder, the gas return valve and the pressure sensor are both arranged on the gas phase pipe, the pressurization pipe is arranged at the bottom of the inner cavity of the gas cylinder, the ECU is electrically connected with the pressure sensor, the pressurization pump, the economic valve, the gas return valve, the, realize the automatically regulated of gas cylinder internal pressure, reduce the influence of going to the truck, economic practicality is stronger.

Description

Intelligent pressurization system for liquefied natural gas supply module assembly

Technical Field

The invention relates to the technical field of new energy, in particular to an intelligent pressurization system for a liquefied natural gas supply module assembly.

Background

LNG is an abbreviation for liquefied natural gas (liquefied natural gas). The major component is methane. LNG is colorless, odorless, non-toxic and non-corrosive, and has a volume of about 1/625 that of the same amount of gaseous natural gas, and the weight of LNG is only about 45% of the same volume of water.

LNG trucks are trucks fueled by Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG). According to different fuel use conditions, the fuel can be divided into a single-fuel natural gas automobile (the engine only uses CNG or LNG as fuel) and a dual-fuel natural gas automobile (the automobile uses diesel oil and natural gas or gasoline and natural gas as fuel). Currently the most widely used are single fuel LNG trucks.

At present, the gas supply system of some LNG trucks adopts a self-pressurization mode, namely, the gas cylinders are pressurized in a mode of a pressurization pipe, a stop valve, a pressurization regulating valve, a finned tube, a gas return valve, a gas phase tube and a gas cylinder, but the pressurization mode shows insufficient power of different degrees under certain working conditions, the driving of the truck is easily influenced, if the LNG is just added, the gas phase in the cylinder is condensed, the pressure is quickly reduced, meanwhile, the fuel consumption of the truck is overlarge under the condition of heavy load, the fuel consumption is overhigh on an upslope, the gas pressure in the cylinder is reduced, the pressurization is not timely, the pressurization of the pressurization system is slow or even is not performed under the low liquid level state, and meanwhile, the pressure in the gas cylinders cannot be remotely monitored in.

Disclosure of Invention

The invention aims to provide an intelligent pressurization system for an liquefied natural gas supply module assembly, which aims to solve the problems that the pressure in a gas cylinder cannot be automatically adjusted and cannot be monitored in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an intelligent pressurization system for a liquefied natural gas supply module assembly comprises a gas cylinder, a gas outlet pipe, an economic valve, a gas phase pipe, a gas return valve, a pressure sensor, a pressurization pipe, a pressurization stop valve, a pressurization regulating valve, a finned pipe, a pressurization pump and an ECU (electronic control unit), wherein the gas cylinder is respectively connected with the gas outlet pipe, the gas phase pipe and the pressurization pipe, the gas cylinder comprises a distribution head, a supporting pipe, heat-insulating cotton, an outer cylinder body and an inner cylinder body, the distribution head is installed at the top of the supporting pipe, the supporting pipe is installed at the end part of the inner cylinder body, the heat-insulating cotton is installed on the outer wall of the inner cylinder body, the outer cylinder body is installed on the outer wall of the heat-insulating cotton, the gas outlet pipe is transversely installed on the gas cylinder, the economic valve is installed between the gas phase pipe and the gas outlet pipe, the gas phase pipe penetrates through, the utility model discloses a gas cylinder, including the gas cylinder, booster pipe, booster stop valve, pressure boost governing valve, ECU electrical output connection pressure sensor, booster pump, economic valve, return air valve, booster stop valve and pressure boost governing valve are installed to the inner chamber bottom at the gas cylinder, booster governing valve all installs on booster pipe, the even booster union coupling in both ends of finned tube, the inlet end and the booster union coupling of booster pump, the end of giving vent to anger and the gaseous phase union coupling of booster pump, ECU electrical.

Preferably, the pressurization stop valve is installed at the position where the root of the gas cylinder is connected with the pressurization pipe.

Preferably, the air outlet pipe is arranged at the top of the inner cavity of the air bottle.

Preferably, the economic valve, the air return valve, the pressurization stop valve and the pressurization regulating valve are all mechanical valves.

Compared with the prior art, the invention has the beneficial effects that: through the arrangement of the intelligent pressurization system for the liquefied natural gas supply module assembly, the structural design is reasonable, under the normal working state, the pressure-increasing stop valve and the air return valve are both in the open state, the pressure sensor of the exhaust valve detects the air pressure in the air bottle through the gas phase pipe, the normal air pressure in the air bottle is between 0.8MPa and 1.2MPa, when the air pressure in the air bottle is detected to be less than 0.8MPa, the ECU controls the power supply to be connected and starts the booster pump, the booster pump enables the gasified air in the finned tube to enter the air bottle through the gas phase tube for boosting, when the pressure sensor detects that the air pressure in the air bottle is higher than 1.2MPa, the ECU controls the booster pump to cut off the power and stop boosting, when the pressure is higher than 1.2MPa, the economic valve is opened, the gaseous fuel gas in the gas cylinder is preferentially used, the gaseous fuel gas flows out from the exhaust valve, the pressure in the gas cylinder is reduced to a normal value, through the setting through ECU, be connected through connecting wire and display device in the car and can be real-time look over gas cylinder internal gas pressure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the gas cylinder of the present invention.

In the figure: 100 gas cylinders, 110 distribution heads, 120 supporting pipes, 130 heat insulation cotton, 140 outer cylinder bodies, 150 inner cylinder bodies, 200 gas outlet pipes, 210 economic valves, 300 gas phase pipes, 310 gas return valves, 320 pressure sensors, 400 pressure increasing pipes, 410 pressure increasing stop valves, 420 pressure increasing regulating valves, 500 finned pipes, 600 pressure increasing pumps and 700 ECU.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the following technical scheme: an intelligent pressurization system for an liquefied natural gas supply module assembly is used for adjusting and monitoring the air pressure in an air cylinder in real time and reducing the influence of air pressure instability on the running of a truck, and please refer to fig. 1, the intelligent pressurization system comprises an air cylinder 100, an air outlet pipe 200, an economic valve 210, a gas phase pipe 300, an air return valve 310, a pressure sensor 320, a pressurization pipe 400, a pressurization stop valve 410, a pressurization regulating valve 420, a finned tube 500, a pressurization pump 600 and an ECU 700;

referring to fig. 2, the gas cylinder 100 is connected to the gas outlet pipe 200, the gas phase pipe 300 and the pressure increasing pipe 400, respectively, the gas cylinder 100 includes a distribution head 110, a support pipe 120, heat insulation cotton 130, an outer cylinder 140 and an inner cylinder 150, the distribution head 110 is installed on the top of the support pipe 120, the support pipe 120 is installed on the top of the inner cylinder 150, the heat insulation cotton 130 is installed on the outer wall of the inner cylinder 150, the outer cylinder 140 is installed on the outer wall of the heat insulation cotton 130, specifically, the gas cylinder 100 is connected to the gas outlet pipe 200, the gas phase pipe 300 and the pressure increasing pipe 400 through the, the joints of the distribution head 110, the gas outlet pipe 200, the gas phase pipe 300 and the pressure increasing pipe 400 are all welded and sealed, the gas cylinder 100 is used for storing and transporting liquefied natural gas, the distribution head 110 is 304 stainless steel, the heat insulation cotton 130 is glass fiber, the heat insulation cotton 130 and the inner cylinder 150 are wound and bound, the inner cylinder 150 is used for reducing heat transfer of the inner cylinder and preventing the situation that the pressure is increased due to vaporization of heated LNG in the bottle;

referring to fig. 1 again, the gas outlet pipe 200 is transversely installed on the gas cylinder 100, the economizer valve 210 is installed between the gas phase pipe 300 and the gas outlet pipe 200, specifically, the gas outlet pipe 200 is a gaseous liquefied gas pipe for flowing out gaseous liquefied gas in the gas cylinder 100, and the economizer valve 210 is used for controlling the conduction state of the gas phase space between the gas phase pipe 300 and the gas outlet pipe 200;

referring to fig. 1 again, the gas tube 300 penetrates the gas cylinder 100, one end of the gas tube 300 is located at the top of the inner cavity of the gas cylinder 100, the gas return valve 310 and the pressure sensor 320 are both installed on the gas tube 300, specifically, the gas tube 300 is used for transporting the gas vaporized in the finned tube 500 to the gas cylinder 100, the gas return valve 310 is used for controlling the opening and closing of the gas tube 300, and the pressure sensor 320 is used for detecting the pressure in the gas tube 300, so as to detect the pressure in the gas cylinder 100;

referring to fig. 1 again, the pressure increasing pipe 400 is installed at the bottom of the inner cavity of the gas cylinder 100, and the pressure increasing stop valve 410 and the pressure increasing regulating valve 420 are both installed on the pressure increasing pipe 400, specifically, the pressure increasing pipe 400 is installed at the storage position of the liquid liquefied gas in the gas cylinder 100 and is used for transporting the liquid liquefied natural gas to the fin tube 500, the pressure increasing stop valve 410 is used for pressure stopping, and the pressure increasing regulating valve 420 is used for regulating the pressure increasing state;

referring to fig. 1 again, one end of the finned tube 500 is connected to the booster tube 400, and the other end is connected to the air inlet end of the booster pump 600, specifically, the finned tube 500 is used for converting liquid-state liquefied gas into gaseous-state liquefied gas, and then is transported into the gas cylinder 100 through the booster pump 600, so as to achieve the purpose of boosting;

referring to fig. 1 again, an air outlet end of the booster pump 600 is connected to the gas phase tube 300, and specifically, the booster pump 600 is used for boosting the pressure of the inner cavity of the gas phase tube 300, so as to boost the pressure in the gas cylinder 100;

referring to fig. 1 again, the ECU700 is electrically connected to the pressure sensor 320 and the booster pump 600, specifically, the electronic control unit, which is also called a "traveling computer" or a "vehicle-mounted computer". The controller is a special microcomputer controller for automobile, and is composed of a microprocessor MCU, a memory ROM, a RAM, an input/output interface I/O, an analog-to-digital converter A/D, and a large-scale integrated circuit for shaping and driving, like a common computer. The ECU700 is used for processing signals detected by the pressure sensor 320, autonomously controlling the start and stop of the booster pump 600, and transmitting pressure information to a remote control end to achieve the purpose of intelligent boosting.

In the specific using process, under the normal working state, the pressure boost stop valve 410 and the gas return valve 310 are both in the open state, the exhaust valve pressure sensor 320 detects the air pressure in the gas cylinder 100 through the gas phase pipe 300, the normal air pressure in the gas cylinder 100 is between 0.8MPa and 1.2MPa, when the air pressure in the gas cylinder 100 is detected to be less than 0.8MPa, the ECU700 controls the power supply to be connected to start the pressure boost pump 600, the pressure boost stop valve 410 and the pressure boost regulating valve 420 are in the open state, the pressure boost pump 600 enables the gas vaporized in the finned pipe 500 to enter the gas cylinder through the gas phase pipe 300 for boosting, when the pressure sensor 320 detects that the air pressure in the gas cylinder 100 is higher than 1.2MPa, the ECU700 controls the power off of the pressure boost pump 600 to stop boosting, when the pressure is higher than 1.2MPa, the economic valve 210 is automatically opened, the gas in the gas state in the gas cylinder 100 is preferentially used, the, through the setting of ECU700, be connected with display device in the car through the connecting wire and can real-time look over gas cylinder 100 internal gas pressure.

Referring to fig. 1 again, in order to improve the stopping efficiency of the pressure increasing stop valve 410 and achieve flexible pressurization, the pressure increasing stop valve 410 is installed near the position where the gas cylinder 100 is connected to the pressure increasing pipe 400.

Referring to fig. 1 again, in order to improve the efficiency of the gas outlet pipe 200 for using the liquefied gas in the gas cylinder 100, the gas outlet pipe 200 is installed at the top of the inner cavity of the gas cylinder 100.

Referring to fig. 1 again, in order to facilitate the opening and closing of the economizer valve 210, the air return valve 310, the pressure-increasing stop valve 410 and the pressure-increasing regulating valve 420, the economizer valve 210, the air return valve 310, the pressure-increasing stop valve 410 and the pressure-increasing regulating valve 420 are all mechanical valves.

While the invention has been described with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the invention disclosed may be used in any combination whatsoever without structural conflict, and the failure to exhaustively describe such combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (4)

1. The utility model provides an intelligence turbocharging system for liquefied natural gas supply module assembly which characterized in that: the gas cylinder comprises a gas cylinder (100), a gas outlet pipe (200), an economic valve (210), a gas phase pipe (300), a gas return valve (310), a pressure sensor (320), a pressure increasing pipe (400), a pressure increasing stop valve (410), a pressure increasing regulating valve (420), a finned pipe (500), a pressure increasing pump (600) and an ECU (700), wherein the gas cylinder (100) is respectively connected with the gas outlet pipe (200), the gas phase pipe (300) and the pressure increasing pipe (400), the gas cylinder (100) comprises a distribution head (110), a support pipe (120), heat insulation cotton (130), an outer cylinder body (140) and an inner cylinder body (150), the distribution head (110) is arranged at the end part of the support pipe (120), the support pipe (120) is arranged at the end part of the inner cylinder body (150), the heat insulation cotton (130) is arranged at the outer wall of the inner cylinder body (150), the outer cylinder body (140) is arranged at the outer wall of the heat insulation cotton (, economic valve (210) are installed between gas phase pipe (300) and outlet duct (200), gas phase pipe (300) run through gas cylinder (100), the one end of gas phase pipe (300) is located the inner chamber top of gas cylinder (100), return-air valve (310) and pressure sensor (320) are all installed on gas phase pipe (300), booster tube (400) are installed in the inner chamber bottom of gas cylinder (100), pressure boost stop valve (410) and pressure boost governing valve (420) are all installed on booster tube (400), the both ends of finned tube (500) all are connected with booster tube (400), the inlet end and the booster tube (400) of booster pump (600) are connected, the outlet end and the gas phase pipe (300) of booster pump (600) are connected, ECU (700) electrical output connects pressure sensor (320), booster pump (600), economic valve (210), return-air valve (310), A pressure-increasing stop valve (410) and a pressure-increasing regulating valve (420).

2. The intelligent pressurization system for the liquefied natural gas supply module assembly according to claim 1, wherein: the pressure increasing stop valve (410) is arranged at a position close to the connection position of the gas cylinder (100) and the pressure increasing pipe (400).

3. The intelligent pressurization system for the liquefied natural gas supply module assembly according to claim 1, wherein: the air outlet pipe (200) is arranged at the bottom of the inner cavity of the air bottle (100).

4. The intelligent pressurization system for the liquefied natural gas supply module assembly according to claim 1, wherein: the economic valve (210), the air return valve (310), the pressurization stop valve (410) and the pressurization regulating valve (420) are all mechanical valves.

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