CN103363291A - Welding gas pumping equipment and method thereof - Google Patents
Welding gas pumping equipment and method thereof Download PDFInfo
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- CN103363291A CN103363291A CN2013103198310A CN201310319831A CN103363291A CN 103363291 A CN103363291 A CN 103363291A CN 2013103198310 A CN2013103198310 A CN 2013103198310A CN 201310319831 A CN201310319831 A CN 201310319831A CN 103363291 A CN103363291 A CN 103363291A
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Abstract
The invention discloses a welding gas pumping equipment and a method thereof. The equipment comprises a liquid natural gas storage device (1), a high-pressure low-temperature pump (2), a vaporizer (3), a gas mixing device (5), and a natural gas synergist storage device (6). The liquid natural gas storage device (1), the high-pressure low-temperature pump (2) and the vaporizer (3) are connected in sequence, and the gas mixing device (5) is connected to the vaporizer (3) and the natural gas synergist storage device (6). The method comprises steps of storing liquid natural gas by the liquid natural gas storage device (1), loading pressure on the liquid natural gas through the high-pressure low-temperature pump (2), transforming the liquid natural gas which has been loaded with pressure into gas phase by the vaporizer (3), storing natural gas synergist through the natural gas synergist device (6), mixing the gas state natural gas with the natural gas synergist to form a welding gas to be pumped by the gas mixing device (5).
Description
Technical field
The present invention relates to a kind of gas filling device and method, relate in particular to a kind of welding gas filling equipment and method.
Background technique
Welding gas of the present invention is comprised of rock gas and synergist, has than acetylene gas, the better performance of propane gas.In the conventional art, welding gas by oxygen cylinder fill principle, adopt the mode of cylinder filling, that is: after liquified natural gas being vaporized in vaporizer, by compressor gas is boosted, thereby makes gas reach the pressure of can.Although this airing form and device can be realized the can of gas, because the cost of compressor is high, and grasps and do comparatively complexity, so that the can cost of welding gas is higher, and inefficiency.
Therefore, be desirable to provide welding gas filling equipment and the method that a kind of cost is low, can efficient is high.
Summary of the invention
For this reason, the present invention proposes a kind of novel welding gas filling equipment and method of at least a portion that can address the above problem.
According to an aspect of the present invention, provide a kind of welding gas filling equipment, it is characterized in that: comprise
Liquified natural gas storage device, described liquified natural gas storage device are used for the storage liquified natural gas;
High-pressure cryogenic pumps, described high-pressure cryogenic pumps is connected with described liquified natural gas storage device, is used for described liquified natural gas pressurization;
Vaporizer, described vaporizer is connected with described high-pressure cryogenic pumps, and the described liquified natural gas after being used for pressurizeing is vaporizated into gaseous natural gas;
Rock gas synergist storage device, described rock gas synergist storage device are used for storage rock gas synergist; And
Gas mixer, described gas mixer are connected with described rock gas synergist storage device with described vaporizer respectively, are used for described gaseous natural gas and described rock gas synergist are mixed, and form welding gas to be filled.
Alternatively, according to an embodiment of the invention, it is characterized in that: described welding gas filling equipment further comprises temperature transducer, to measure the temperature of described gaseous natural gas.
Alternatively, according to an embodiment of the invention, it is characterized in that: described welding gas filling equipment further comprises control system, and described control system is connected with described temperature transducer with described high-pressure cryogenic pumps respectively,
The temperature feedback of the described gaseous natural gas that described temperature transducer will record is given described control system, and described control system is sent to described high-pressure cryogenic pumps according to the feedback of described temperature transducer and brought into operation or order out of service.
Alternatively, according to an embodiment of the invention, it is characterized in that: described welding gas filling equipment further comprises safety valve and pressure transmitter,
Described safety valve is connected with described gas mixer, to regulate the pressure of described gas mixer;
One end of described pressure transmitter is connected with described gas mixer, the other end is connected with described control system, described pressure transmitter is given described control system with the pressure feedback of its described gas mixer that records, and described control system is sent to described high-pressure cryogenic pumps according to the feedback of described pressure transmitter and brought into operation or order out of service.
Alternatively, according to an embodiment of the invention, it is characterized in that: described control system comprises the PLC control system.
Alternatively, according to an embodiment of the invention, it is characterized in that: described welding gas filling equipment further comprises variable-frequency motor, described variable-frequency motor is connected with described high-pressure cryogenic pumps, regulating the flow of described high-pressure cryogenic pumps according to the progress that fills of described welding gas, and then control the flow of described liquified natural gas.
According to another aspect of the present invention, provide a kind of welding gas methods for filling,
Utilize liquified natural gas memory device stores liquified natural gas;
At the high-pressure cryogenic pumps place that is connected with described liquified natural gas storage device described liquified natural gas is pressurizeed;
With vaporizer that described high-pressure cryogenic pumps is connected in described liquified natural gas after will pressurizeing be vaporizated into gaseous natural gas;
Utilize rock gas synergist memory device stores rock gas synergist; And
Mixing described gaseous natural gas and described rock gas synergist respectively with in described vaporizer and the gas mixer that described rock gas synergist storage device is connected, to form welding gas to be filled.
Alternatively, according to an embodiment of the invention, utilize the temperature of the described gaseous natural gas of temperature sensor measurement.
Alternatively, according to an embodiment of the invention, utilize the temperature feedback of the described gaseous natural gas that described temperature transducer will record to described control system, described control system is sent to described high-pressure cryogenic pumps according to described feedback and is brought into operation or order out of service.
Alternatively, according to an embodiment of the invention, utilize described variable-frequency motor to regulate the flow of described high-pressure cryogenic pumps, and then control the flow of described liquified natural gas.
Welding gas filling equipment provided by the invention and method can reduce at least the can cost, improve can efficient.
Description of drawings
By reading hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing only is used for the purpose of preferred implementation is shown, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts with identical reference symbol.Wherein in the accompanying drawings, the alphabetic flag after the reference number is indicated a plurality of identical parts, when these parts of general reference, will omit its last alphabetic flag.In the accompanying drawings:
Fig. 1 shows the schematic representation according to a kind of welding gas filling equipment of the present invention; And
Fig. 2 shows the schematic representation of the welding gas filling equipment of a preferred embodiment of the invention.
Wherein, liquified natural gas storage device 1, high-pressure cryogenic pumps 2, vaporizer 3, flowmeter 4, gas mixer 5, rock gas synergist storage device 6, metering pump 7, control system 8, temperature transducer 9, variable-frequency motor 10, inflation gas cylinder 11.
Embodiment
The invention provides many applicable creative concepts, what this creativeness concept can be a large amount of is embodied in the concrete context.The specific embodiment of describing in following embodiments of the present invention is only as the exemplary illustration of the specific embodiment of the present invention, and do not consist of limitation of the scope of the invention.
The invention will be further described below in conjunction with accompanying drawing and concrete mode of execution.
Fig. 1 shows the schematic representation according to a kind of welding gas filling equipment of the present invention, wherein, and liquified natural gas storage device 1, high-pressure cryogenic pumps 2, vaporizer 3, gas mixer 5 and rock gas synergist storage device 6.
A kind of welding gas filling equipment is characterized in that: comprise liquified natural gas storage device 1, described liquified natural gas storage device 1 is used for the storage liquified natural gas; High-pressure cryogenic pumps 2, described high-pressure cryogenic pumps 2 is connected with described liquified natural gas storage device 1, is used for described liquified natural gas pressurization; Vaporizer 3, described vaporizer 3 is connected with described high-pressure cryogenic pumps 2, and the described liquified natural gas after being used for pressurizeing is vaporizated into gaseous natural gas; Rock gas synergist storage device 6, described rock gas synergist storage device 6 is used for storage rock gas synergist; And gas mixer 5, described gas mixer 5 is connected with described rock gas synergist storage device 6 with described vaporizer 3 respectively, is used for described gaseous natural gas and described rock gas synergist are mixed, and forms welding gas to be filled.
The present invention can realize continuously synthetic and cylinder filling of welding gas, and utilizes the required principle low in energy consumption of liquid carrying pressure ratio gas boosting, again with its vaporization, has realized saving energy and reduce the cost after liquified natural gas is boosted, and has reduced the cost of production of enterprise.Secondly, welding gas filling equipment provided by the invention and method can reduce can cost, the raising can efficient of welding gas.
Embodiment
Fig. 2 shows the schematic representation of the welding gas filling equipment of a preferred embodiment of the invention.Wherein, liquified natural gas storage device 1, high-pressure cryogenic pumps 2, vaporizer 3, flowmeter 4, gas mixer 5, rock gas synergist storage device 6, metering pump 7, control system 8, temperature transducer 9, variable-frequency motor 10, inflation gas cylinder 11.
A kind of welding gas filling equipment comprises liquified natural gas storage device 1, and described liquified natural gas storage device 1 is used for the storage liquified natural gas; High-pressure cryogenic pumps 2, described high-pressure cryogenic pumps 2 is connected with described liquified natural gas storage device 1, is used for described liquified natural gas pressurization; Vaporizer 3, described vaporizer 3 is connected with described high-pressure cryogenic pumps 2, and the described liquified natural gas after being used for pressurizeing is vaporizated into gaseous natural gas; Rock gas synergist storage device 6, described rock gas synergist storage device 6 is used for storage rock gas synergist; And gas mixer 5, described gas mixer 5 is connected with described rock gas synergist storage device 6 with described vaporizer 3 respectively, is used for described gaseous natural gas and described rock gas synergist are mixed, and forms welding gas to be filled.
The English full name of liquified natural gas is that Liquefied Natural Gas(is hereinafter to be referred as LNG).Liquified natural gas storage device 1 comprises low temperature storing tank and Dewar tank.Preferably, the technical parameter of low temperature storing tank is: operating temperature :-162 ℃; Working pressure: storage tank 0.8MPa; Form structure: vertical, the band automatic pressure intensifier; Adiabatic pattern: vacuum-powders insulation; Storage volumes: 10m
3/ 20m
3/ 60m
3Three types; Daily evaporation amount :≤0.48%(LN2).The technical parameter of Dewar tank is: storage medium: the LNG(liquified natural gas); Operating temperature :-162 ℃; Working pressure: 1.4MPa; Form structure: vertical, the band automatic pressure intensifier; Gas transmission ability: 9m
3/ h(rock gas); Adiabatic pattern: vacuum-powders insulation; Volume: 175L/210L; Daily evaporation amount :≤2.1%(LN2).Because the volume of low temperature storing tank is larger, can satisfy the continuous requirement of welding gas, therefore, more preferably, selects low temperature storing tank as liquified natural gas storage device 1.
Need during cylinder filling welding gas is boosted, can access the key that stable pressurized gas are this programme.The present invention adopts high-pressure cryogenic pumps 2 to be used for liquified natural gas and boosts, and LNG is pressurized to 16MPa from 0.8MPa.
Vaporizer is a kind of industry and civilian energy-saving equipment, and its effect is the gas that liquid gas is converted into gaseous state.The gas that wherein relates to is a lot, such as: liquid oxygen, liquid nitrogen, liquid argon etc.Described vaporizer 3 is high-pressure carburetor, and its effect is that the LNG through the high-pressure cryogenic pumps pressurization is vaporizated into gaseous natural gas.Preferably, the operating temperature of described vaporizer 3 is-162 ℃, and working pressure is 16MPa, outlet temperature 〉=5 ℃, pattern: air temperature type, vaporization ability: 300Nm
3/ h.
The rock gas synergist refers to natural gas applications when industry is cut, and is a kind of special chemical composition that the flame temperature that improves rock gas is added, and the rock gas accelerant mainly is divided into solid-state, liquid, three kinds of forms of powder at present.The Main Function of rock gas synergist is to be natural gas combustion-supporting synergy.An amount of rock gas synergist has the advantages that to improve combustion performance, combustion temperature, and quantitative adding rock gas synergist will determine the product performance of synthetic welding gas.Rock gas synergist of the present invention comprises that all can improve the material of combustion of natural gas efficient in the technology of being limited to, and also comprises unknown material.Therefore, the present invention further comprises rock gas synergist storage device 6, and described rock gas synergist storage device 6 is connected with described gas mixer 5.Preferably, described rock gas synergist storage device 6 is selected stainless steel material.
The effect of gas mixer 5 is that rock gas and synergist can be mixed therein.Because stainless steel material can be high pressure resistant, preferably, described gas mixer 5 is selected stainless steel material.
Described welding gas filling equipment further comprises flowmeter 4, and described flowmeter 4 is arranged between described vaporizer 3 and the described gas mixer 5, to measure the flow of gaseous natural gas.Described flowmeter be the indication measured flux and (or) in the instrument of selected time lag inner fluid total amount.The flowmeter English name is flowmeter, and national scientific and technical terminology validation board is defined as it: the indication measured flux and (or) in the instrument of selected time lag inner fluid total amount.Be exactly a kind of instrument that is used for measuring channel or open channel fluid flow in simple terms, conventional unit m on the engineering
3/ h, it can be divided into instantaneous flow (Flow Rate) and integrated flow (Total Flow), and instantaneous flow is the amount of crossing closed conduct or open channel effective cross section in the unit time, and the material that flows through can be gas, liquid, solid.Integrated flow is within a certain period time lag (one day, a week, January, 1 year) flow and crosses the cumulative amount of closed conduct or open channel effective cross section.Also can try to achieve integrated flow by instantaneous flow to time integral, so also can mutually transform between instantaneous flowmeter and the flow quantity recorder.The industrial process measurement and control instrument of the fluid flows such as liquid, gas or steam claims again flowmeter in measuring channel or the open drain.Flow refer to flow through in the unit time amount of fluid of pipeline effective cross section.Amount of fluid is called volume flowrate with the volume signifier, and unit is rice
3/ time, l/h etc.; Amount of fluid is called mass flow rate with quality representation person, and unit is ton/time, kilogram/time etc.
Described welding gas filling equipment further comprises metering pump 7, and described metering pump 7 is arranged between described rock gas synergist storage device 6 and the described gas mixer 5, to control the flow of described rock gas synergist.Preferably, the pattern of described metering pump 7 is plunger pump/mechanical diaphragm type, Media density: 0.98kg/L, and operating temperature is-20～40 ℃, and flow is 0～3.2L/h, and inlet pressure is normal pressure, and outlet pressure is 16MPa.
When the rock gas synergist according to the flow of described gaseous natural gas quantitatively, automatically, during add in real time, the firing effect of the welding gas that obtains is optimum.Therefore, control system described in the present invention 8 is connected with described metering pump 7 with described flowmeter 4 respectively, with the flow according to the described metering pump 7 of Flow-rate adjustment of the described rock gas of described flowmeter 4 feedbacks, thereby controls the flow of described rock gas synergist.
Described welding gas filling equipment further comprises control system 8, described control system 8 is connected with described metering pump 7 with described flowmeter 4 respectively, with the flow according to the described metering pump 7 of Flow-rate adjustment of the described gaseous natural gas of described flowmeter 4 feedbacks, thereby control the flow of described rock gas synergist.Described control system 8 comprises the PLC control system.The use of PLC control system has improved the accuracy of gas filling, has reduced simultaneously workman's labor intensity.PLC=Programmable Logic Controller, programmable logic controller (PLC), the electronics of a kind of digital operation operation aims in industrial environment and uses and design.It adopts a class programmable memory, be used for its internally stored program, actuating logic computing, sequence control, regularly, the user oriented instructions such as counting and arithmetical operation, and by numeral or the analog pattern input/output various types of machineries of control or production process, be the core of industrial control.PLC and relevant peripheral unit thereof all should be according to being easy to and industrial control system forms an integral body, are easy to expand the principle of its function and design.PLC has been widely used in the industry-by-industries such as iron and steel, oil, chemical industry, electric power, building materials, machine-building, automobile, light textile, communications and transportation, environmental protection and entertainment, it has high reliability, antijamming capability is strong, powerful, flexible, be easy to learn and use, volume is little, lightweight, low-cost characteristics.
Described welding gas filling equipment further comprises temperature transducer 9, to measure the temperature of described gaseous natural gas.Described control system 8 is connected with described temperature transducer 9 with described high-pressure cryogenic pumps 2 respectively, the temperature feedback of the described gaseous natural gas that described temperature transducer 9 will record is given described control system 8, and described control system 8 is sent to described high-pressure cryogenic pumps 2 according to the feedback of described temperature transducer 9 and brought into operation or order out of service.This be because: when the ability of vaporizer inadequate, in the time of can not LNG being vaporizated into the rock gas of normal-temperature fully, cryogenic natural gas will cause damage to pipeline and equipment thereafter, so the present invention will play the effect that prevents that pipeline and equipment from being damaged by cryogenic natural gas by this design.Preferably, described temperature transducer 9 is arranged on apart from the position of 3 one meters in described vaporizer, to measure the temperature of described gaseous natural gas.Preferably, when the temperature of gaseous natural gas reached-20 ℃, described control system 8 stopped the running of described high-pressure cryogenic pumps 2.
Described welding gas filling equipment further comprises safety valve and pressure transmitter, and described safety valve is connected with described gas mixer 5, to regulate the pressure of described gas mixer 5; One end of described pressure transmitter is connected with described gas mixer 5, the other end is connected with described control system 8, described pressure transmitter is given described control system 8 with the pressure feedback of its described gas mixer 5 that records, and described control system 8 is sent to described high-pressure cryogenic pumps 2 according to the feedback of described pressure transmitter and brought into operation or order out of service.
Safety valve is a kind of safety protection valve; its open-shut device is subjected to be in normally off under the External Force Acting; pressure medium in equipment or pipeline raises, and automatically opens when surpassing specified value, prevents that by discharge medium outside system pressure medium surpasses specified value in pipeline or the equipment.Safety valve belongs to the self-acting valve class, is mainly used on boiler, pressurized container and the pipeline, and pilot pressure is no more than specified value, and personal safety and equipment have been moved important protective action.Preferably, safety valve setting pressure is 17MPa, and when pressure reached 17MPa, safety valve was with take-off emptying.Reseating pressure of a safety valve is made as 16MPa, and when pressure reached 16MPa, safety valve stopped discharging.The installation of safety valve, the danger of effectively having avoided the equipment superpressure to bring.
Pressure transmitter (pressure transmitter) refers to be output as the pressure transducer of standard signal, is a kind of pressure variations of accepting, and after the sensing conversion, pressure variety is converted to by a certain percentage the instrument of standard output signals.The physical pressure parameters such as the gas that it can be experienced load cell, liquid are transformed into the electrical signal (such as 4～20mADC etc.) of standard, and the secondary meters such as indicator alarm, recorder, regulator are measured to supply with, indication and procedure regulation.Preferably, when gas mixer pressure reaches 16MPa, pressure transmitter is passed to control system with this signal, control system stops the running of cryogenic high pressure pump at this moment, when gas mixer pressure is 13MPa, this signal is passed to control system, and control system starts the running of cryogenic high pressure pump at this moment.Through behind this pressure interlock, will make this covering device laboratory automation control.
Described welding gas filling equipment further comprises variable-frequency motor 10, and described variable-frequency motor 10 is connected with described high-pressure cryogenic pumps 2, regulating the flow of described high-pressure cryogenic pumps 2 according to the progress that fills of described welding gas, and then controls the flow of described liquified natural gas.Variable-frequency motor adopts the AC speed-regulating mode of " special-purpose variable frequency induction motor+frequency variator ", makes mechanical automation degree and manufacturing efficiency greatly improve device miniaturization, increases travelling comfort, is just replacing traditional mechanical speed governors and DC speed regulation scheme at present.The speed governing of motor and control are one of basic technologies of all kinds of machineries of industrial or agricultural and office, people's livelihood electric equipment.Surprising development along with Power Electronic Technique, microelectronic technology, adopt the AC speed-regulating mode of " special-purpose variable frequency induction motor+frequency variator ", with its remarkable performance and Economy, in the speed governing field, guided a change that replaces the update of traditional mode of speed regulation.The Gospel that it brings to all trades and professions is: make the greatly raising of mechanical automation degree and manufacturing efficiency, energy saving, raising product percent of pass and quality of product, the corresponding raising of power-supply system capacity, device miniaturization, increase travelling comfort, just replace traditional mechanical speed governors and DC speed regulation scheme with very fast speed.The variable-frequency motor test generally needs to adopt inverter supply, because the frequency variator output frequency has wider excursion, and the PWM ripple of output contains abundant harmonic wave, traditional mutual inductor and power meter can not satisfy the measurement needs of test, should adopt wideband power analyzer and variable-frequency electric transmitter/sensor.
Preferably described variable-frequency motor 10 adopts the frequency conversion explosion proof motor, security level IP55, and explosive-proof grade DIICT4, frequency variator adopts Siemens or ABB product, is with on the spot explosive operation post, realizes opening on the spot, stop function, and can realize long-range shutdown and operation Presentation Function.
Preferably, inflation gas cylinder 11 is connected with described gas mixer 5, thereby realizes the can of gas, and this design will make things convenient for medium and small user to use, the transportation of convenient synthetic welding gas.In addition, tradition welding gas cylinder filling need rely on CNG(Compressed Natural Gas, be called for short CNG) gas station, utilize the pressurized gas of gas station to realize filling, and welding gas filling equipment provided by the invention can in the Anywhere establishment fueling station that has a good transport service, improve the production capacity of cylinder filling greatly.
Preferably, be provided with the mixed gas damping device between described inflation gas cylinder 11 and the described gas mixer 5, thereby so that the mixing of described welding gas is more even, more can improve firing effect.
Preferably, be connected by pipeline between each device of the present invention, welding is adopted in the joint, has greatly reduced the possibility of combustible gas leakage, makes more reliable, the safety of device operation.
Below a kind of welding gas methods for filling provided by the invention is described:
A kind of welding gas methods for filling utilizes liquified natural gas storage device 1 storage liquified natural gas; At high-pressure cryogenic pumps 2 places that are connected with described liquified natural gas storage device 1 described liquified natural gas is pressurizeed; With vaporizer 3 that described high-pressure cryogenic pumps 2 is connected in described liquified natural gas after will pressurizeing be vaporizated into gaseous natural gas.Utilize rock gas synergist storage device 6 storage rock gas synergist, mixing described gaseous natural gas and described rock gas synergist respectively with in described vaporizer 3 and the gas mixer 5 that described rock gas synergist storage device 6 is connected, to form welding gas to be filled.This welding gas in pipeline is filled into gas cylinder, cylinder filling pressure 16MPa.
Further, in order to optimize the gas filling effect, utilize the flowmeter 4 that is arranged between described vaporizer 3 and the described gas mixer 5, measure the flow of described gaseous natural gas; Utilization is arranged on the described metering pump 7 between described rock gas synergist storage device 6 and the described gas mixer 5, controls the adding quantity of described rock gas synergist; Utilize respectively the described control system 8 that is connected with described metering pump 7 with described flowmeter 4, according to the flow of the described metering pump 7 of Flow-rate adjustment of the described gaseous natural gas of described flowmeter 4 feedbacks, control the flow of described rock gas synergist.
Further, in order to optimize the gas filling effect, and protect described welding gas filling equipment provided by the invention, utilize temperature transducer 9 to measure the temperature of described gaseous natural gas.The temperature feedback of the described gaseous natural gas that described temperature transducer 9 will record is given described control system 8, and described control system 8 is sent to described high-pressure cryogenic pumps 2 according to described feedback and brought into operation or order out of service.
At last, according to the speed that fills of described welding gas, utilize the variable-frequency motor 10 that is connected with described high-pressure cryogenic pumps 2 to regulate the flow of described high-pressure cryogenic pumps 2, thereby control the flow of described LNG Liquefied natural gas.
Generally speaking, the invention has the advantages that: at first, realize continuously synthetic and cylinder filling of welding gas, utilize the required principle low in energy consumption of liquid carrying pressure ratio gas boosting, device is realized energy-saving and cost-reducing.Secondly, welding is adopted in the joint, has greatly reduced the leakage of inflammable gas, more reliable, the safety of device operation.Also have, and welding gas filling equipment provided by the invention can in the Anywhere establishment fueling station that has a good transport service, improve the production capacity of cylinder filling greatly.At last, welding gas filling equipment provided by the invention has been used simple to operate, easy maintenance.Simultaneously, the metering of temperature, rock gas synergist is all controlled automatically by blind controller system, safe and reliable, indirect investment is few, and the feature of environmental protection is high, realizes simultaneously the synthetic and product packing of welding gas.The present invention can realize the production line cylinder filling, greatly improves refitting station efficient and scale, can also reduce workman's physical labor intensity.
Should be noted that, the liquified natural gas storage device 1 of mentioning described in claims of the present invention and the specification, high-pressure cryogenic pumps 2, vaporizer 3, flowmeter 4, gas mixer 5, rock gas synergist storage device 6, metering pump 7, control system 8, temperature transducer 9, variable-frequency motor 10, inflation gas cylinder 11 etc., both comprise the equipment that prior art provides, also comprised the equipment that following technology provides.
It should be noted that the present invention will be described rather than limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment in the situation of the scope that does not break away from claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed in element or step in the claim.Being positioned at word " " before the element or " one " does not get rid of and has a plurality of such elements.The use of word first, second and C grade does not represent any order.Can be title with these word explanations.
Claims (10)
1. a welding gas filling equipment is characterized in that: comprise
Liquified natural gas storage device (1), described liquified natural gas storage device (1) are used for the storage liquified natural gas;
High-pressure cryogenic pumps (2), described high-pressure cryogenic pumps (2) is connected with described liquified natural gas storage device (1), is used for described liquified natural gas pressurization;
Vaporizer (3), described vaporizer (3) is connected with described high-pressure cryogenic pumps (2), and the described liquified natural gas after being used for pressurizeing is vaporizated into gaseous natural gas;
Rock gas synergist storage device (6), described rock gas synergist storage device (6) are used for storage rock gas synergist; And
Gas mixer (5), described gas mixer (5) is connected with described rock gas synergist storage device (6) with described vaporizer (3) respectively, be used for described gaseous natural gas and described rock gas synergist are mixed, form welding gas to be filled.
2. welding gas filling equipment according to claim 1, it is characterized in that: described welding gas filling equipment further comprises temperature transducer (9), to measure the temperature of described gaseous natural gas.
3. welding gas filling equipment according to claim 2, it is characterized in that: described welding gas filling equipment further comprises control system (8), described control system (8) is connected with described temperature transducer (9) with described high-pressure cryogenic pumps (2) respectively
The temperature feedback of the described gaseous natural gas that described temperature transducer (9) will record is given described control system (8), and described control system (8) is sent to described high-pressure cryogenic pumps (2) according to the feedback of described temperature transducer (9) and brought into operation or order out of service.
4. welding gas filling equipment according to claim 3, it is characterized in that: described welding gas filling equipment further comprises safety valve and pressure transmitter,
Described safety valve is connected with described gas mixer (5), to regulate the pressure of described gas mixer (5);
One end of described pressure transmitter is connected with described gas mixer (5), the other end is connected with described control system (8), described pressure transmitter is given described control system (8) with the pressure feedback of its described gas mixer (5) that records, and described control system (8) is sent to described high-pressure cryogenic pumps (2) according to the feedback of described pressure transmitter and brought into operation or order out of service.
5. welding gas filling equipment according to claim 3, it is characterized in that: described control system (8) comprises the PLC control system.
6. the described welding gas filling equipment of any one according to claim 1～5, it is characterized in that: described welding gas filling equipment further comprises variable-frequency motor (10), described variable-frequency motor (10) is connected with described high-pressure cryogenic pumps (2), regulating the flow of described high-pressure cryogenic pumps (2) according to the progress that fills of described welding gas, and then control the flow of described liquified natural gas.
7. welding gas methods for filling,
Utilize liquified natural gas storage device (1) storage liquified natural gas;
Locate described liquified natural gas pressurization in the high-pressure cryogenic pumps (2) that is connected with described liquified natural gas storage device (1);
With vaporizer (3) that described high-pressure cryogenic pumps (2) is connected in described liquified natural gas after will pressurizeing be vaporizated into gaseous natural gas;
Utilize rock gas synergist storage device (6) storage rock gas synergist; And
Mixing described gaseous natural gas and described rock gas synergist respectively with in described vaporizer (3) and the gas mixer (5) that described rock gas synergist storage device (6) is connected, to form welding gas to be filled.
8. method according to claim 7 utilizes temperature transducer (9) to measure the temperature of described gaseous natural gas.
9. method according to claim 8, utilize the temperature feedback of the described gaseous natural gas that described temperature transducer (9) will record to described control system (8), described control system (8) is sent to described high-pressure cryogenic pumps (2) according to described feedback and is brought into operation or order out of service.
10. the described method of any one according to claim 7～9 is utilized described variable-frequency motor (10) to regulate the flow of described high-pressure cryogenic pumps (2), and then is controlled the flow of described liquified natural gas.
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| CN203404603U (en) * | 2013-07-26 | 2014-01-22 | 苍溪县大通天然气投资有限公司 | Welding and cutting gas filling equipment |
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2013
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| CN1537925A (en) * | 2003-10-22 | 2004-10-20 | 贵州七星科技发展有限公司 | Safety environmental protection industrial welding cutting gas using matural gas as main raw material |
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Application publication date: 20131023 |