CN112193058A - A fuel filling auxiliary device for preventing back flush - Google Patents
A fuel filling auxiliary device for preventing back flush Download PDFInfo
- Publication number
- CN112193058A CN112193058A CN202011041543.XA CN202011041543A CN112193058A CN 112193058 A CN112193058 A CN 112193058A CN 202011041543 A CN202011041543 A CN 202011041543A CN 112193058 A CN112193058 A CN 112193058A
- Authority
- CN
- China
- Prior art keywords
- connecting cylinder
- plug
- fuel
- pressure
- oil filling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
- B60K15/0403—Anti-siphoning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
- B60K2015/0458—Details of the tank inlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
- B60K2015/0458—Details of the tank inlet
- B60K2015/048—Arrangements for sealing the fuel inlet during filling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention provides a fuel filling auxiliary device for preventing back spray, which comprises a pressure device, a connecting cylinder, a sealing ring, a plug and a vacuum pump, wherein the pressure device is arranged on the connecting cylinder; the pressurizing device is used for applying downward axial pressure to the connecting cylinder through manual operation or auxiliary machinery, a fuel oil filling pipeline and a vacuumizing pipeline which are communicated with the inner cavity of the connecting cylinder are arranged on the connecting cylinder, and the shape of the pipeline opening of the fuel oil filling pipeline is the same as that of the automobile fuel oil filling opening; the tail end of the connecting cylinder is fixedly sleeved with a sealing ring, the tail end of the connecting cylinder is also connected with a plug, the plug is of a hollow structure, the inner cavity of the plug is communicated with the inner cavity of the connecting cylinder, the tail end of the plug is provided with an oil outlet, and the diameter of the plug is smaller than that of an automobile fuel filling port; the vacuum pump is connected with the vacuumizing pipeline; according to the invention, on the premise of not changing the existing fuel filling gun, when the primary fuel filling is carried out on line, the gas in the fuel tank can be extracted by using the vacuum pump, the air pressure in the fuel tank is lower than the external atmospheric pressure, and the phenomenon of fuel filling back-spray is prevented.
Description
Technical Field
The invention relates to the field of fuel oil filling, in particular to a fuel oil filling auxiliary device for preventing back injection.
Background
With the implementation of the national six-emission regulation in the automobile industry, the models of all host plants conforming to the national six-emission regulation are put into production successively; for gasoline vehicles, the carbon tank is not provided with a vent pipe due to the requirements of national six ORVR regulations, and fuel vapor during refueling is forcibly absorbed by the improved carbon tank; compared with the traditional carbon tank, the improved carbon tank has the advantages of increased volume, enhanced filterability and reduced air permeability; when the vehicle carries out primary fuel oil filling on line, because the gas generated by the volatilization of gasoline in the oil tank can not be discharged in time through the carbon tank vent pipe, the air pressure in the oil tank is higher than the external pressure atmospheric pressure, and then the phenomenon of fuel oil filling back-spray is generated.
The phenomenon of fuel oil filling and back spraying refers to the phenomenon that a small amount of fuel oil is sprayed from an oil filling port at 5S-6S when primary fuel oil filling is carried out on line in the whole vehicle production; particularly, in high-temperature summer seasons, the surfaces of the oil filling pipe and the oil tank are in a dry state, and when fuel is filled for the first time, a large amount of gasoline is volatilized on the surfaces of the oil filling pipe and the oil tank, so that the pressure in the oil tank is increased instantly, and the phenomenon of fuel back spraying is easily caused.
Disclosure of Invention
The invention aims to provide a fuel oil filling auxiliary device for preventing back spray, which can perform vacuumizing operation on an oil tank before primary fuel oil filling on the premise of not changing the conventional fuel oil filling gun, so that the pressure in the oil tank is smaller than the external atmospheric pressure during the fuel oil filling, and the back spray phenomenon of the fuel oil filling is prevented.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fuel oil filling auxiliary device for preventing back spray comprises a pressure device, a connecting cylinder, a sealing ring, a plug and a vacuum pump; the pressure applying device is used for applying downward axial pressure to the connecting cylinder through manual operation or auxiliary machinery, the connecting cylinder is of a hollow structure, the upper end of the connecting cylinder is fixedly connected with the pressure applying device, a fuel oil filling pipeline and a vacuumizing pipeline which are communicated with the inner cavity of the connecting cylinder are arranged on the connecting cylinder, and the shape of the pipeline opening of the fuel oil filling pipeline is the same as that of the automobile fuel oil filling opening; the tail end of the connecting cylinder is fixedly sleeved with a sealing ring, the tail end of the connecting cylinder is also connected with a plug, the sealing ring is matched with an automobile fuel filling port, the plug is of a hollow structure, the inner cavity of the plug is communicated with the inner cavity of the connecting cylinder, the tail end of the plug is provided with an oil outlet, and the diameter of the plug is smaller than that of the automobile fuel filling port; the vacuum pump is connected with the vacuumizing pipeline.
The auxiliary machinery can adopt an air cylinder, and the air cylinder is hoisted at a fuel oil filling station and used for applying downward axial pressure to the connecting cylinder through the pressure applying device.
The center of the pressure device is provided with a threaded hole, and the tail end of the cylinder rod of the cylinder is provided with a thread matched with the threaded hole and used for connecting the cylinder rod with the pressure device.
The vacuum reminder comprises a vacuum sensor, a microprocessor, a wireless transmitting chip and a wireless receiver which is arranged on the outer wall of the plug and has a sound reminding function, wherein the vacuum sensor, the microprocessor and the wireless transmitting chip are arranged on the outer wall of the plug; the vacuum sensor is used for detecting an air pressure signal in the oil tank and transmitting the air pressure signal to the microprocessor, the microprocessor is used for judging the air pressure state in the oil tank, and the wireless receiver with the sound reminding function is controlled to send out sound reminding through the signal transmission of the wireless transmitting chip when the oil tank reaches the set air pressure state.
The pressure applying device, the connecting cylinder and the plug are all made of PVC plastic materials.
The oil outlet of the plug is connected with an oil filling pipe, and the diameter of the oil filling pipe is not larger than the diameter of a fuel oil filling gun.
The invention has the beneficial effects that:
according to the fuel oil filling auxiliary device for preventing the back spray, disclosed by the invention, on the premise of not changing the conventional fuel oil filling gun, when the primary fuel oil filling is carried out on line, gas in the oil tank can be extracted by using the vacuum pump, so that the air pressure in the oil tank is lower than the external atmospheric pressure, and the phenomenon of the back spray of the fuel oil filling is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
As shown in fig. 1: the invention relates to a fuel oil filling auxiliary device for preventing back spray, which comprises a pressure applying part 1, a connecting cylinder 7, a sealing ring 4, a plug 5 and a vacuum pump; the pressure applying part 1 is used for applying downward axial pressure to the connecting cylinder 7 through manual operation or auxiliary machinery, the connecting cylinder 7 is of a hollow structure, the upper end of the connecting cylinder 7 is fixedly connected with the pressure applying part 1, a fuel oil filling pipeline 2 and a vacuumizing pipeline 3 which are communicated with the inner cavity of the connecting cylinder 7 are arranged on the connecting cylinder 7, and the shape of a pipeline opening of the fuel oil filling pipeline 2 is the same as that of an automobile fuel oil filling opening; the tail end of the connecting cylinder 7 is fixedly sleeved with a sealing ring 4, the tail end of the connecting cylinder 7 is also connected with a plug 5, the sealing ring 4 is matched with an automobile fuel filling port, the plug 5 is of a hollow structure, the inner cavity of the plug 5 is communicated with the inner cavity of the connecting cylinder 7, the tail end of the plug 5 is provided with an oil outlet, and the diameter of the plug 5 is smaller than that of the automobile fuel filling port; the vacuum pump is connected with the vacuum-pumping pipeline 3.
The using process of the invention is as follows: in the production of the whole vehicle, when the primary fuel oil filling is carried out on line, firstly, the fuel oil filling auxiliary device for preventing the back injection is placed into the fuel oil filling opening of the vehicle, and as the sealing ring 4 is matched with the fuel oil filling opening of the vehicle, the sealing ring 4 can well seal the fuel oil filling opening of the vehicle; then a fuel filling gun is placed on the fuel filling pipeline 2, and the shape of the pipeline opening of the fuel filling pipeline 2 is the same as that of the automobile fuel filling opening, so that the fuel filling gun can well seal the fuel filling pipeline 2; at the moment, downward axial pressure is applied to the connecting cylinder 7 through the pressure applying part 1 manually or by means of auxiliary machinery to ensure that the sealing of an automobile fuel oil filling port is good, the vacuum pump is started, gas in the oil tank is extracted through the vacuumizing pipeline 3, the pressure in the oil tank is ensured to be lower than the back-injection pressure of fuel oil filling, and the specific pressure applying time can be obtained through limited tests, which is not repeated in the invention; at the moment, because the gas pressure in the oil tank is less than the external pressure atmospheric pressure, the fuel oil filling auxiliary device for preventing the back spray can well seal the fuel oil filling port of the automobile under the action of the external atmospheric pressure, fuel oil filling personnel can release hands or withdraw an auxiliary machine, simultaneously press a switch of a fuel oil filling gun to fill the automobile, and the back spray phenomenon of the fuel oil can not occur in the whole oil filling process; furthermore, because the diameter of the plug 5 is smaller than that of the automobile fuel filling opening, when the fuel filling auxiliary device for preventing back injection is placed on the automobile fuel filling opening, the plug 5 can extend into an oil tank to prevent the connecting cylinder 7 from shaking left and right, so that the stability of the connecting cylinder 7 and the sealing ring 4 is enhanced, and the good sealing performance of the automobile fuel filling opening is further ensured.
Preferably: in the fuel oil filling auxiliary device for preventing the back spray, the auxiliary machinery can adopt an air cylinder, and the air cylinder is hung and arranged at a fuel oil filling station and is used for applying downward axial pressure to a connecting cylinder 7 through a pressure applying part 1; furthermore, the cylinder can be hoisted at the fuel filling station by utilizing the mechanical arm, so that the two hands of fuel filling personnel are liberated when the position of the cylinder rod is adjusted, and the labor cost is saved.
Preferably: in the fuel oil filling auxiliary device for preventing the back spray, the center of the pressure applying part 1 is provided with a threaded hole, and the tail end of the cylinder rod of the cylinder is provided with a thread matched with the threaded hole and used for connecting the cylinder rod with the pressure applying part 1 so as to ensure the stability of connection between the cylinder rod and the pressure applying part 1 and facilitate disassembly and assembly.
Preferably: the fuel oil filling auxiliary device for preventing the back spray also comprises a vacuum reminder, wherein the vacuum reminder comprises a vacuum sensor, a microprocessor and a wireless transmitting chip which are arranged on the outer wall of the plug 5, and a wireless receiver which is arranged at a fuel oil filling station and has a sound reminding function; the vacuum sensor is used for detecting an air pressure signal in the oil tank and transmitting the air pressure signal to the microprocessor, the microprocessor is used for judging the air pressure state in the oil tank, and the wireless receiver with the sound reminding function is controlled to send out sound reminding through the signal transmission of the wireless transmitting chip when the oil tank reaches the set air pressure state; the set air pressure state can be obtained through limited tests or historical experience values, and the invention is not described in detail.
Preferably: in the fuel oil filling auxiliary device for preventing the back spray, the pressure applying part 1, the connecting cylinder 7 and the plug 5 are all made of PVC plastic materials, and other high-strength and light materials can be adopted to facilitate the operation of fuel oil filling personnel.
Preferably: in the fuel oil filling auxiliary device for preventing back spray, the oil outlet hole of the plug 5 is connected with the oil filling pipe 6, the diameter of the oil filling pipe 6 is not more than the pipe diameter of a fuel oil filling gun, and the pressure when gasoline is filled through the oil filling pipe 6 is not less than the pressure when the gasoline is directly filled through the fuel oil filling gun.
Preferably: in the fuel oil filling auxiliary device for preventing the back spray, the sealing ring 4 is the silica gel sealing ring 4 which is low in price, good in elasticity and corrosion-resistant, and the service life and the good sealing performance of the sealing ring 4 are further ensured.
The invention has the beneficial effects that:
according to the fuel oil filling auxiliary device for preventing the back spray, disclosed by the invention, on the premise of not changing the conventional fuel oil filling gun, when the primary fuel oil filling is carried out on line, gas in the oil tank can be extracted by using the vacuum pump, so that the air pressure in the oil tank is lower than the external atmospheric pressure, and the phenomenon of the back spray of the fuel oil filling is prevented.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A fuel filling auxiliary device for preventing back spray is characterized in that: comprises a pressure device, a connecting cylinder, a sealing ring, a plug and a vacuum pump; the pressure applying device is used for applying downward axial pressure to the connecting cylinder through manual operation or auxiliary machinery, the connecting cylinder is of a hollow structure, the upper end of the connecting cylinder is fixedly connected with the pressure applying device, a fuel oil filling pipeline and a vacuumizing pipeline which are communicated with the inner cavity of the connecting cylinder are arranged on the connecting cylinder, and the shape of the pipeline opening of the fuel oil filling pipeline is the same as that of the automobile fuel oil filling opening; the tail end of the connecting cylinder is fixedly sleeved with a sealing ring, the tail end of the connecting cylinder is also connected with a plug, the sealing ring is matched with an automobile fuel filling port, the plug is of a hollow structure, the inner cavity of the plug is communicated with the inner cavity of the connecting cylinder, the tail end of the plug is provided with an oil outlet, and the diameter of the plug is smaller than that of the automobile fuel filling port; the vacuum pump is connected with the vacuumizing pipeline.
2. A fuel fill assist device for preventing back spray as defined in claim 1 wherein: the auxiliary machinery can adopt an air cylinder, and the air cylinder is hoisted at a fuel oil filling station and used for applying downward axial pressure to the connecting cylinder through the pressure applying device.
3. A fuel fill assist device for preventing back spray as defined in claim 2 wherein: the center of the pressure device is provided with a threaded hole, and the tail end of the cylinder rod of the cylinder is provided with a thread matched with the threaded hole and used for connecting the cylinder rod with the pressure device.
4. A fuel fill assist device for preventing back spray as defined in claim 1 wherein: the vacuum reminder comprises a vacuum sensor, a microprocessor, a wireless transmitting chip and a wireless receiver which is arranged on the outer wall of the plug and has a sound reminding function, wherein the vacuum sensor, the microprocessor and the wireless transmitting chip are arranged on the outer wall of the plug; the vacuum sensor is used for detecting an air pressure signal in the oil tank and transmitting the air pressure signal to the microprocessor, the microprocessor is used for judging the air pressure state in the oil tank, and the wireless receiver with the sound reminding function is controlled to send out sound reminding through the signal transmission of the wireless transmitting chip when the oil tank reaches the set air pressure state.
5. A fuel fill assist device for preventing back spray as defined in claim 1 wherein: the pressure applying device, the connecting cylinder and the plug are all made of PVC plastic materials.
6. A fuel fill assist device for preventing back spray as defined in claim 1 wherein: the oil outlet of the plug is connected with an oil filling pipe, and the diameter of the oil filling pipe is not larger than the diameter of a fuel oil filling gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041543.XA CN112193058B (en) | 2020-09-28 | 2020-09-28 | A fuel filling auxiliary device for preventing back flush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041543.XA CN112193058B (en) | 2020-09-28 | 2020-09-28 | A fuel filling auxiliary device for preventing back flush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112193058A true CN112193058A (en) | 2021-01-08 |
| CN112193058B CN112193058B (en) | 2021-08-06 |
Family
ID=74007684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011041543.XA Active CN112193058B (en) | 2020-09-28 | 2020-09-28 | A fuel filling auxiliary device for preventing back flush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112193058B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002144893A (en) * | 2000-11-07 | 2002-05-22 | Suzuki Motor Corp | Spit back preventing structure for fuel tank |
| US20020083997A1 (en) * | 1999-12-03 | 2002-07-04 | O'connell Patrick R. | Fuel tank filler neck and method of manufacturing same |
| CN101378930A (en) * | 2006-01-31 | 2009-03-04 | 考特克斯·特克斯罗恩有限公司及两合公司 | Fuel tank for a motor vehicle |
| CN101885461A (en) * | 2010-07-06 | 2010-11-17 | 奇瑞汽车股份有限公司 | Plastic filling pipe for fuel oil system |
| CN203545662U (en) * | 2013-10-17 | 2014-04-16 | 璟泰（清远）橡胶工业有限公司 | Portable liquid filling device |
| CN204263932U (en) * | 2014-11-04 | 2015-04-15 | 广西南星科技有限公司 | Oil filling pipe for automobiles assembly |
| CN110683501A (en) * | 2019-09-30 | 2020-01-14 | 北京星航机电装备有限公司 | Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag |
-
2020
- 2020-09-28 CN CN202011041543.XA patent/CN112193058B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020083997A1 (en) * | 1999-12-03 | 2002-07-04 | O'connell Patrick R. | Fuel tank filler neck and method of manufacturing same |
| JP2002144893A (en) * | 2000-11-07 | 2002-05-22 | Suzuki Motor Corp | Spit back preventing structure for fuel tank |
| CN101378930A (en) * | 2006-01-31 | 2009-03-04 | 考特克斯·特克斯罗恩有限公司及两合公司 | Fuel tank for a motor vehicle |
| CN101885461A (en) * | 2010-07-06 | 2010-11-17 | 奇瑞汽车股份有限公司 | Plastic filling pipe for fuel oil system |
| CN203545662U (en) * | 2013-10-17 | 2014-04-16 | 璟泰（清远）橡胶工业有限公司 | Portable liquid filling device |
| CN204263932U (en) * | 2014-11-04 | 2015-04-15 | 广西南星科技有限公司 | Oil filling pipe for automobiles assembly |
| CN110683501A (en) * | 2019-09-30 | 2020-01-14 | 北京星航机电装备有限公司 | Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112193058B (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112193058B (en) | A fuel filling auxiliary device for preventing back flush | |
| CN201099615Y (en) | Fuel refiller | |
| CN201516803U (en) | Improved clutch operating system for automobile | |
| CN204952605U (en) | Carbon dioxide recovery system | |
| CN203745155U (en) | Fuel tank comprehensive leakage detection platform | |
| CN204422158U (en) | The static leak locator of water seal | |
| CN201769314U (en) | Vacuumizing device of tire bladder vulcanizing machine | |
| CN210214779U (en) | Vacuum negative pressure filling system | |
| CN203402917U (en) | Gun tube of oil vapor recovery oil-adding gun | |
| CN204702499U (en) | Effectively can regulate the oil gas recovery system of gas station of gas liquid ratio | |
| CN204637386U (en) | The self-styled liquid suction device of a kind of remote control | |
| CN204369546U (en) | A kind of liquid adds priming device | |
| CN208247964U (en) | A kind of automobile oil suction formula fuel tank | |
| CN202141568U (en) | Device for detecting pressure in pipe internal cavity of evaporator | |
| CN211644581U (en) | Foam liquid injection device of foam fire engine | |
| CN203402916U (en) | Gun tube of oil vapor recovery oil-adding gun | |
| CN203667986U (en) | Automatic oil feeder for field work | |
| CN209834603U (en) | Manual self-pressurization device for liquid chemical storage tank | |
| CN205246293U (en) | Positive densification nature device of automobile ro -Ro vessel ligature eye thimble | |
| CN204689976U (en) | Yellow wine fermentation device | |
| CN214700267U (en) | Filling system oil filling riser liquid ammonia recovery system | |
| CN205086896U (en) | Afterburning pump inner loop gas braking system of loader | |
| CN214653617U (en) | Auxiliary device for filling barreled oil | |
| CN204236433U (en) | Multifunctional tyre inflating gun | |
| CN219346218U (en) | Air pressure safety detection device for filling air bottle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |