CN111022907A - LNG vehicle-mounted gas cylinder supercharging device - Google Patents

LNG vehicle-mounted gas cylinder supercharging device Download PDF

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Publication number
CN111022907A
CN111022907A CN201911301553.XA CN201911301553A CN111022907A CN 111022907 A CN111022907 A CN 111022907A CN 201911301553 A CN201911301553 A CN 201911301553A CN 111022907 A CN111022907 A CN 111022907A
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CN
China
Prior art keywords
gas cylinder
control device
vehicle
lng vehicle
lng
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Pending
Application number
CN201911301553.XA
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Chinese (zh)
Inventor
王永红
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Changzhou Xuruan Metal Material Technology Co Ltd
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Changzhou Xuruan Metal Material Technology Co Ltd
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Priority to CN201911301553.XA priority Critical patent/CN111022907A/en
Publication of CN111022907A publication Critical patent/CN111022907A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0178—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a LNG vehicle-mounted gas cylinder supercharging device, which comprises: the on-vehicle gas cylinder of LNG that the crouch set up is fixed on the below inside wall of the inner bag of the on-vehicle gas cylinder of LNG and is provided with heating device, heating device include: the heating element is fixed on the inner side wall below the inner container through a support piece; and a power line and a signal line of the heating device are led out of the LNG vehicle-mounted gas cylinder through a distributor at the position of the cylinder opening of the LNG vehicle-mounted gas cylinder. The LNG vehicle-mounted gas cylinder supercharging device with the structure does not need to additionally add a supercharging pipe with fins, is compact in structure, and the heating device is arranged in the inner container of the LNG vehicle-mounted gas cylinder, so that the supercharging process is not influenced by the temperature of the external environment, and the supercharging is stable and reliable.

Description

LNG vehicle-mounted gas cylinder supercharging device
Technical Field
The invention relates to a technology for pressurizing an LNG (liquefied natural gas) vehicle-mounted gas cylinder, in particular to a pressurizing device for the LNG vehicle-mounted gas cylinder.
Background
Liquefied natural gas (LNG for short) is a recognized clean energy in the world at present, has the advantages of high heat value, sufficient combustion, low price, good transportation economy, good safety and the like, and is deeply loved by wide users. Liquefied natural gas vehicles using LNG as a fuel have been put into operation, and LNG vehicle-mounted gas cylinders have also received much attention as a key part of a vehicle-mounted fuel system for liquefied natural gas vehicles.
The on-vehicle gas cylinder of LNG is in the use, and along with the decline of liquid level in the inner bag, pressure in the inner bag also can descend, can lead to gas cylinder pressure not enough when the liquid level descends certain position in the inner bag, therefore needs carry out the pressure boost to the on-vehicle gas cylinder of LNG. The existing LNG vehicle-mounted gas cylinder supercharging device achieves the purpose of supercharging by arranging the supercharging pipe with the fins exposed in the external environment, and liquid in the inner container absorbs heat and is gasified into gas when passing through the supercharging pipe and then returns to the inner container, so that the supercharging process is completed. However, the above-mentioned increase process is greatly influenced by the external environment temperature, so that it is difficult to ensure the stability of the pressure in the inner container.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the on-vehicle gas cylinder supercharging device of LNG that provides the pressure boost reliable and stable.
In order to solve the problems, the invention adopts the technical scheme that: the LNG vehicle-mounted gas cylinder supercharging device comprises: the on-vehicle gas cylinder of LNG that the crouch set up is fixed on the below inside wall of the inner bag of the on-vehicle gas cylinder of LNG and is provided with heating device, heating device include: the heating element is fixed on the inner side wall below the inner container through a support piece; and a power line and a signal line of the heating device are led out of the LNG vehicle-mounted gas cylinder through a distributor at the position of the cylinder opening of the LNG vehicle-mounted gas cylinder.
Further, aforementioned on-vehicle gas cylinder supercharging device of LNG, wherein, heating device is located the inside wall middle part in the below of the on-vehicle gas cylinder's of LNG inner bag.
Further, the LNG vehicle-mounted gas cylinder supercharging device comprises a gas collecting tank fixedly arranged on the inner side wall below the inner container of the LNG vehicle-mounted gas cylinder, at least one liquid inlet hole is formed in the side wall of the lower portion of the gas collecting tank, a connecting hole communicated with the inner cavity of the gas collecting tank is formed in the top of the gas collecting tank, a gas guide pipe is vertically arranged in the inner container, a pipe orifice at the lower end of the gas guide pipe is hermetically communicated with the connecting hole in the top of the gas collecting tank, a pipe orifice at the upper end of the gas guide pipe is fixedly connected with the inner side wall above the inner container, and at least one gas outlet hole is formed in the side wall; the heating device is fixedly arranged at the bottom of the gas collecting tank, and a power line and a signal line of the heating device penetrate through one of the gas outlet holes on the gas guide pipe and then are led out of the gas collecting tank through a distributor at the bottle mouth of the LNG vehicle-mounted gas bottle.
Further, the LNG vehicle-mounted gas cylinder supercharging device comprises a tank bottom of the gas collection tank, wherein the tank bottom is opened to form an open opening, the open opening is fixedly connected with the inner side wall of the inner container, and the heating device is fixed on the inner side wall of the inner container at the bottom of the gas collection tank.
Further, the LNG vehicle-mounted gas cylinder supercharging device is characterized in that at least one liquid inlet hole is formed in the lower portion of the gas collection tank and on the side walls of the gas collection tank, wherein the side walls of the gas collection tank are opposite to the side walls of the gas collection tank.
Further, in the LNG vehicle-mounted gas cylinder supercharging device, the lower portion of the gas collection tank and the opposite side walls on the two sides are respectively provided with a liquid inlet hole, and the two liquid inlet holes are through holes in the shape of an arched door frame.
Further, in the LNG vehicle-mounted gas cylinder pressurization device, a control device is arranged outside the LNG vehicle-mounted gas cylinder, and a power line and a signal line of the heating device are led out of the cylinder through a distributor at a cylinder opening of the LNG vehicle-mounted gas cylinder and then connected with the control device; a pressure sensor for detecting the pressure of the inner container is also arranged in the LNG vehicle-mounted gas cylinder, a signal line of the pressure sensor is connected with the control device, and an ignition switch of the liquefied natural gas vehicle is connected with the control device; the control device can control the heating device to be electrified or not to be electrified according to the state of the ignition switch, the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor, and the control device comprises the following specific steps:
when an ignition switch of the liquefied natural gas automobile is in an un-started state, the control device controls the heating device to be powered off, low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
after the ignition switch is started by a key or started without the key, the control device judges in real time according to the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor:
if the pressure value detected by the pressure sensor exceeds the set pressure value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the temperature value detected by the temperature sensor exceeds the set temperature value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor do not exceed the set value of the control device, the control device controls the heating device to be powered on, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is heated, and the supercharging device operates.
The invention has the beneficial effects that: the additional arrangement of the pressure increasing pipe with the fins is not needed, the structure is compact, the pressure increasing process is not influenced by the temperature of the external environment, and the pressure increasing is stable and reliable.
Drawings
Fig. 1 is a schematic structural diagram of a pressurization device for an LNG vehicle-mounted gas cylinder according to the first embodiment.
Fig. 2 is a schematic structural diagram of an LNG vehicle-mounted gas cylinder pressurization device according to the second embodiment.
Fig. 3 is a schematic view of a first configuration of a gas collection canister.
Fig. 4 is a schematic diagram of the left-side view of fig. 3.
Fig. 5 is a schematic view of a second configuration of a gas collection canister.
Fig. 6 is a schematic diagram of the left-side view of fig. 5.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
Example one
As shown in fig. 1, the LNG vehicle-mounted gas cylinder pressurization device according to this embodiment includes: on-vehicle gas cylinder of LNG 1 that crouches and set up, on-vehicle gas cylinder of LNG 1 includes inner bag 11, shell body 12 and sets up the distributor 3 in bottleneck department. A heating device 2 is fixedly arranged on the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and as shown in figure 3, the heating device 2 comprises: a heating element 21 with a temperature sensor, wherein the heating element 21 is fixed on the lower inner side wall of the inner container 11 through a support piece 22. The power line and the signal line 20 of the heating device 2 are led out of the LNG vehicle-mounted gas cylinder through the distributor 3 at the cylinder opening of the LNG vehicle-mounted gas cylinder.
The heating device 2 can be arranged at any position of the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and also can be arranged in the middle of the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1.
A control device is arranged outside the LNG vehicle-mounted gas cylinder 1, and a power line and a signal line 20 of the heating device 2 are led out of the LNG vehicle-mounted gas cylinder 1 through a distributor 3 at the cylinder mouth and then connected with the control device. The LNG vehicle-mounted gas cylinder 1 is also internally provided with a pressure sensor for detecting the pressure of the inner container, a signal line of the pressure sensor is connected with a control device, and an ignition switch of the liquefied natural gas vehicle is connected with the control device. The control device can control the heating device 2 to be electrified or not to be electrified according to the state of the ignition switch, the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor.
The working principle of the LNG vehicle-mounted gas cylinder supercharging device in the embodiment is as follows:
when an ignition switch of the liquefied natural gas automobile is in an un-started state, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat the low-temperature liquid in the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and namely, the supercharging device stops working after the automobile stops.
After the ignition switch is started by a key or started without the key, the control device judges in real time according to the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor:
if the pressure value detected by the pressure sensor exceeds the set pressure value of the control device, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat the low-temperature liquid in the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and the supercharging device stops working;
if the temperature value detected by the temperature sensor exceeds the set temperature value of the control device, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat the low-temperature liquid in the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and the supercharging device stops working;
if the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor do not exceed the set value of the control device, the control device controls the heating device 2 to be powered on, at the moment, the heating device 2 heats the low-temperature liquid in the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and the supercharging device operates.
The LNG vehicle-mounted gas cylinder supercharging device with the structure does not need to additionally arrange a supercharging pipe with fins, and is compact in structure; in addition, set up heating device 2 in the inner bag 11 of the on-vehicle gas cylinder 1 of LNG, the pressure boost process is not influenced by external environment temperature, and the pressure boost is reliable and stable.
Example two
As shown in fig. 2, the LNG vehicle-mounted gas cylinder pressurization device according to the present embodiment includes: on-vehicle gas cylinder of LNG 1 that crouches and set up, on-vehicle gas cylinder of LNG 1 includes inner bag 11, shell body 12 and sets up the distributor 3 in bottleneck department. The gas collecting tank 4 is fixedly arranged on the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1, and the gas collecting tank 4 can be arranged at any position of the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1 and also can be arranged in the middle of the inner side wall below the inner container 11 of the LNG vehicle-mounted gas cylinder 1.
At least one liquid inlet hole 42 is formed in the side wall of the lower portion of the gas collecting tank 4, as shown in fig. 5 and 6, the liquid inlet holes 42 may be disposed at the following positions: at least one liquid inlet hole 42 is respectively arranged on the lower part and two opposite side walls of the gas collecting tank 4. When the liquid inlet holes 42 are respectively formed in the lower portion and the opposite side walls of the two sides of the gas collecting tank 4, as shown in fig. 3 and 4, the two centrosymmetric liquid inlet holes 42 may be through holes in the shape of an arched door frame. The two arrangements of the liquid inlet holes 61 are given in the present embodiment, but the arrangement of the liquid inlet holes 61 is not limited to the two arrangements.
Offer the connecting hole 41 with the intercommunication of gas collection tank inner chamber at gas collection tank 4 top, the gas conduit 5 is vertical to be set up in inner bag 11, and the sealed intercommunication of connecting hole 41 at 5 lower extreme mouths of tubes of gas conduit and gas collection tank 4 top, the top inside wall fixed connection of 5 upper end mouths of tubes of gas conduit and inner bag 11, at least one venthole 51 has been seted up on the lateral wall of 5 upper portions of gas conduit, in the actual operation process, each venthole 51 can be the even interval distribution of range mode on the circumference of gas conduit upper portion.
When 4 tank bottoms of gas collection tank are sealed, heating device 2 is fixed and is set up in 4 tank bottoms of gas collection tank. When the tank bottom of the gas collection tank 4 is opened to form an open opening, the open opening is fixedly connected with the inner side wall of the inner container 11, and the heating device 2 is fixed on the inner side wall of the inner container 11 at the bottom of the gas collection tank 4. The power line and the signal line 20 of the heating device 2 are led out of the LNG vehicle-mounted gas cylinder after passing through one of the gas outlet holes 51 on the gas guide pipe 5 and passing through the distributor 3 at the cylinder mouth of the LNG vehicle-mounted gas cylinder.
A control device is arranged outside the LNG vehicle-mounted gas cylinder 1, and a power line and a signal line 20 of the heating device 2 are led out of the LNG vehicle-mounted gas cylinder 1 through a distributor 3 at the cylinder mouth and then connected with the control device. The LNG vehicle-mounted gas cylinder 1 is also internally provided with a pressure sensor for detecting the pressure of the inner container, a signal line of the pressure sensor is connected with a control device, and an ignition switch of the liquefied natural gas vehicle is connected with the control device. The control device can control the heating device 2 to be electrified or not to be electrified according to the state of the ignition switch, the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor.
The working principle of the LNG vehicle-mounted gas cylinder supercharging device in the embodiment is as follows:
when an ignition switch of the liquefied natural gas automobile is in an un-started state, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat low-temperature liquid in the inner cavity of the gas collecting tank, and the supercharging device stops working after the automobile stops.
After the ignition switch is started by a key or started without the key, the control device judges in real time according to the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor:
if the pressure value detected by the pressure sensor exceeds the set pressure value of the control device, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat the low-temperature liquid in the inner cavity of the gas collecting tank, and the supercharging device stops working;
if the temperature value detected by the temperature sensor exceeds the set temperature value of the control device, the control device controls the heating device 2 to be powered off, at the moment, the heating device 2 does not heat the low-temperature liquid in the inner cavity of the gas collection tank, and the supercharging device stops working;
if the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor do not exceed the set value of the control device, the control device controls the heating device 2 to be electrified, at the moment, the heating device 2 heats the low-temperature liquid in the inner cavity of the gas collecting tank, and the supercharging device operates.
When the supercharging device operates, the heating device 2 heats the low-temperature liquid in the inner cavity of the gas collection tank, the low-temperature liquid absorbs heat and is gasified into gas, and the gas enters the gas phase space of the inner container 11 through the gas guide pipe 5 and the gas outlet holes 51 to realize supercharging.
The LNG vehicle-mounted gas cylinder supercharging device with the structure does not need to additionally arrange a supercharging pipe with fins, and is compact in structure; with heating device setting up in the inner bag of the on-vehicle gas cylinder 1 of LNG, the pressure boost process does not receive external environment temperature to influence, and the pressure boost is reliable and stable. In addition, each air outlet 51 is arranged at the upper part of the gas conduit 5, and the gas which is gasified by absorbing heat of the low-temperature liquid directly enters the gas phase space of the inner container 11 after passing through each air outlet 51, so that the phenomenon of reliquefaction generated when the gasified gas passes through the low-temperature liquid and the influence on the supercharging effect are avoided, and the stability and reliability of supercharging are further improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.

Claims (8)

1. An LNG vehicle-mounted gas cylinder supercharging device comprises: on-vehicle gas cylinder of LNG that crouches setting, its characterized in that: fixedly on the below inside wall of the inner bag of the on-vehicle gas cylinder of LNG, be provided with heating device, heating device include: the heating element is fixed on the inner side wall below the inner container through a support piece; and a power line and a signal line of the heating device are led out of the LNG vehicle-mounted gas cylinder through a distributor at the position of the cylinder opening of the LNG vehicle-mounted gas cylinder.
2. The LNG vehicle-mounted gas cylinder pressurization device according to claim 1, characterized in that: the heating device is arranged in the middle of the inner side wall below the inner container of the LNG vehicle-mounted gas cylinder.
3. The LNG vehicle-mounted gas cylinder pressurization device according to claim 1 or 2, characterized in that: a gas collecting tank is fixedly arranged on the inner side wall below the inner container of the LNG vehicle-mounted gas cylinder, at least one liquid inlet hole is formed in the side wall of the lower portion of the gas collecting tank, a connecting hole communicated with the inner cavity of the gas collecting tank is formed in the top of the gas collecting tank, a gas guide pipe is vertically arranged in the inner container, a pipe orifice at the lower end of the gas guide pipe is hermetically communicated with the connecting hole in the top of the gas collecting tank, a pipe orifice at the upper end of the gas guide pipe is fixedly connected with the inner side wall above the inner container, and at least one gas outlet hole is; the heating device is fixedly arranged at the bottom of the gas collecting tank, and a power line and a signal line of the heating device penetrate through one of the gas outlet holes on the gas guide pipe and then are led out of the gas collecting tank through a distributor at the bottle mouth of the LNG vehicle-mounted gas bottle.
4. The LNG vehicle-mounted gas cylinder pressurization device according to claim 3, characterized in that: the tank bottom of the gas collection tank is opened to form an open opening, the open opening is fixedly connected with the inner side wall of the inner container, and the heating device is fixed on the inner side wall of the inner container at the bottom of the gas collection tank.
5. The LNG vehicle-mounted gas cylinder pressurization device according to claim 3, characterized in that: at least one liquid inlet hole is respectively arranged on the lower part and the opposite side walls at the two sides of the gas collecting tank.
6. The LNG vehicle-mounted gas cylinder pressurization device according to claim 3, characterized in that: the lower part of the gas collecting tank and the opposite side walls at the two sides are respectively provided with a liquid inlet hole, and the two liquid inlet holes are through holes in the shape of an arched door frame.
7. The LNG vehicle-mounted gas cylinder pressurization device according to claim 1 or 2, characterized in that: a control device is arranged outside the LNG vehicle-mounted gas cylinder, and a power line and a signal line of the heating device are led out of the LNG vehicle-mounted gas cylinder through a distributor at the position of a cylinder opening of the LNG vehicle-mounted gas cylinder and then are connected with the control device; a pressure sensor for detecting the pressure of the inner container is also arranged in the LNG vehicle-mounted gas cylinder, a signal line of the pressure sensor is connected with the control device, and an ignition switch of the liquefied natural gas vehicle is connected with the control device; the control device can control the heating device to be electrified and heated or not to be electrified according to the state of the ignition switch, the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor, and the control device comprises the following specific steps:
when an ignition switch of the liquefied natural gas automobile is in an un-started state, the control device controls the heating device to be powered off, low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
after the ignition switch is started by a key or started without the key, the control device judges in real time according to the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor:
if the pressure value detected by the pressure sensor exceeds the set pressure value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the temperature value detected by the temperature sensor exceeds the set temperature value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor do not exceed the set value of the control device, the control device controls the heating device to be powered on, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is heated, and the supercharging device operates.
8. The LNG vehicle-mounted gas cylinder pressurization device according to claim 3, characterized in that: a control device is arranged outside the LNG vehicle-mounted gas cylinder, and a power line and a signal line of the heating device are led out of the LNG vehicle-mounted gas cylinder through a distributor at the position of a cylinder opening of the LNG vehicle-mounted gas cylinder and then are connected with the control device; a pressure sensor for detecting the pressure of the inner container is also arranged in the LNG vehicle-mounted gas cylinder, a signal line of the pressure sensor is connected with the control device, and an ignition switch of the liquefied natural gas vehicle is connected with the control device; the control device can control the heating device to be electrified and heated or not to be electrified according to the state of the ignition switch, the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor, and the control device comprises the following specific steps:
when an ignition switch of the liquefied natural gas automobile is in an un-started state, the control device controls the heating device to be powered off, low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
after the ignition switch is started by a key or started without the key, the control device judges in real time according to the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor:
if the pressure value detected by the pressure sensor exceeds the set pressure value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the temperature value detected by the temperature sensor exceeds the set temperature value of the control device, the control device controls the heating device to be powered off, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is not heated, and the supercharging device stops working;
if the pressure value detected by the pressure sensor and the temperature value detected by the temperature sensor do not exceed the set value of the control device, the control device controls the heating device to be powered on, the low-temperature liquid in the inner container of the LNG vehicle-mounted gas cylinder is heated, and the supercharging device operates.
CN201911301553.XA 2019-12-17 2019-12-17 LNG vehicle-mounted gas cylinder supercharging device Pending CN111022907A (en)

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