CN114893716A - Liquid gas supply heating control system and control method - Google Patents

Liquid gas supply heating control system and control method Download PDF

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Publication number
CN114893716A
CN114893716A CN202210539249.4A CN202210539249A CN114893716A CN 114893716 A CN114893716 A CN 114893716A CN 202210539249 A CN202210539249 A CN 202210539249A CN 114893716 A CN114893716 A CN 114893716A
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CN
China
Prior art keywords
heating
gas supply
controller
gas
supply bottle
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Pending
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CN202210539249.4A
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Chinese (zh)
Inventor
郑世明
童华宁
刘霞
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Changxing Yunteng New Energy Technology Co ltd
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Changxing Yunteng New Energy Technology Co ltd
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Priority to CN202210539249.4A priority Critical patent/CN114893716A/en
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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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • 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
    • F17C2221/01—Pure fluids
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • 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
    • 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
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0374—Localisation of heat exchange in or on a vessel in the liquid
    • 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
    • F17C2270/05—Applications for industrial use

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  • 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 liquid gas supply heating control system and a control method, and aims to provide a liquid gas supply heating control system and a control method capable of maintaining the pressure stability of supplied gas. The invention has the beneficial effects that: the purpose of maintaining the pressure stability of the supplied gas is achieved; the system has various protection systems, and can provide more perfect safety; can effectively control the synchronous supply of the double gas supply cylinders.

Description

Liquid gas supply heating control system and control method
Technical Field
The invention relates to the technical field related to heating control systems, in particular to a liquid gas supply heating control system and a control method.
Background
In the field of semiconductor processing, such as wafers, panels, light emitting diodes or solar photovoltaic products, gases, such as nitrogen, oxygen, helium, argon, etc., are often used to participate in the processing reaction. For the gas stored in liquid state, such as helium, it is common to purchase the liquid gas stored in an oxygen supply bottle (gas cylinder) as an oxygen supply source, connect the gas supply bottle to a preset gas delivery pipeline, heat the gas supply bottle to heat and gasify the liquid gas, and deliver the gas to the gas supply station end for use through the gas delivery pipeline.
Chinese patent No. CN107543031B, granted on a date of 2021, 11/05, discloses a heating control system and method for liquefied gas supply system, comprising: the liquid gas tank is placed on the platform weight scale, the platform weight scale reads the weight of the liquid gas stored in the gas tank, the heater is placed at the bottom of the gas tank and is in direct contact with the outer wall of the gas tank, the gas tank is heated as required, the temperature of the evaporated gas is applied by the programmable logic controller, the temperature generated by the heater, the electric energy required by the heater for heating the gas tank is calculated by the ambient temperature and the weight of the liquid gas, the heater is provided with a plurality of temperature set points, the setting is set according to the preset weight range of the liquid gas, and the heater heats the gas tank at the constant temperature of each temperature set point, so that a stepped temperature control mode is formed.
Meanwhile, in the conventional heating system, as shown in fig. 1, a heating structure 12 is disposed around the air supply bottle 10, and a temperature sensor 14 is disposed outside the air supply bottle 10 to monitor the air supply state of the air supply bottle 10. However, the actual temperature of the gas in the gas supply bottle 10 cannot be known in this way, and the pressure state in the gas supply bottle 10 cannot be accurately predicted. In addition, when the amount of gas required by the gas supply system 16 increases, the gas pressure tends to decrease due to the slow addition reaction. When the amount of gas required by the gas supply system 16 is reduced or stopped, the gas supply bottles 10 that are continuously being heated may be at risk because of the excessive internal pressure.
Disclosure of Invention
The invention provides a liquid gas supply heating control system and a liquid gas supply heating control method, which can maintain the pressure stability of supplied gas in order to overcome the defect that the pressure stability of the supplied gas cannot be maintained because the pressure state of the gas in a gas supply bottle cannot be predicted in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a liquid gas supply heating control system, it includes gaseous supply station and at least one heating control system, heating control system includes heating controller and gas supply bottle, be equipped with the gas line on the gas supply bottle, the gas supply bottle is connected with gaseous supply station through the gas line, be equipped with temperature sensor one in the gas line, temperature sensor one is connected with the heating controller electricity, temperature sensor one can dismantle with the gas line and be connected, the bottom of gas supply bottle is equipped with heating device, heating device can dismantle with the gas supply bottle and be connected, heating device is connected with the heating controller electricity.
The heating control system comprises a heating controller and a gas supply bottle, a gas pipeline is arranged on the gas supply bottle, the gas supply bottle is connected with a gas supply station through the gas pipeline, a first temperature sensor is arranged in the gas pipeline and is electrically connected with the heating controller, the first temperature sensor is detachably connected with the gas pipeline, a heating device is arranged at the bottom of the gas supply bottle and is detachably connected with the gas supply bottle, and the heating device is electrically connected with the heating controller. The invention uses the temperature sensor I to detect the gas temperature in the gas pipeline and transmits the signal to the heating controller, and the heating controller drives the heating device to carry out proper adjustment according to the received signal, thereby achieving the purpose of maintaining the pressure stability of the supplied gas, and effectively avoiding the gas temperature state judgment error of the gas supply bottle and the gas supply pressure oscillation caused by the gas temperature state judgment error caused by the factors such as the thermal resistance of the gas supply bottle, the external environment and the like when the temperature sensor arranged outside the gas supply bottle is used in the prior art.
Preferably, the one end and the gas supply bottle of gas pipeline can be dismantled and be connected, the other end and the gas supply station of gas pipeline can be dismantled and be connected, temperature sensor one is located gas pipeline and can dismantle the one end of being connected with the gas supply bottle in, is convenient for improve the degree of accuracy that temperature sensor one detected the gas temperature in the gas pipeline.
Preferably, the heating device comprises a heating blanket and a positioning sheet, the positioning sheet is arc-shaped and matched with the bottom of the air supply bottle, the heating blanket is detachably connected with the air supply bottle through the positioning sheet, and the heating blanket is electrically connected with the heating controller. The heating device adopts a soft heating blanket, and the heating blanket is tightly attached to the surface of the bottom of the air supply bottle through the positioning sheet, so that the attachment degree of the heating blanket and the air supply bottle is improved, and the heating efficiency is improved; the positioning plate can be made of iron sheets and other materials; in addition, since the liquid gas contained in the gas cylinder is generally only half of the inner space of the gas cylinder and the last remaining amount of the gas cylinder, as shown in fig. 3, the main heating area of the heating device is centrally disposed at the bottom end area a of the heating blanket, so that the liquid gas can be effectively heated.
Preferably, the heating control system further comprises a power-off controller, a pressure sensor is arranged on the gas pipeline and detachably connected with the gas pipeline, and the pressure sensor is electrically connected with the heating controller through the power-off controller. The pressure sensor monitors the gas pressure in the gas pipeline in real time, and transmits a signal to the power-off controller, the power-off controller judges whether the pressure is too high or too low, if so, the power-off signal is transmitted to the heating controller, so that the phenomenon that the gas supply bottle is dangerous or the empty bottle is dried due to too large pressure when the operation of the temperature sensor is failed is avoided, and the safety performance is favorably improved.
Preferably, the air supply bottle is provided with a second temperature sensor, the second temperature sensor is detachably connected with the surface of the air supply bottle, and the second temperature sensor is electrically connected with the heating controller. The temperature sensor is used for synchronously monitoring the temperature of the surface of the air supply bottle and transmitting a signal to the heating controller so as to avoid the overheating of the heating device from causing the temperature exceeding the load of the air supply bottle, thereby being beneficial to improving the safety performance.
Preferably, an overheat protection switch is detachably mounted in the heating device, and the overheat protection switch is electrically connected with the heating controller through a power-off controller. The overheating protection switch is used for judging whether the heating device exceeds the temperature of the load of the heating device or not, if so, a signal is transmitted to the heating controller, so that the heating device is prevented from being burnt due to overhigh temperature, and the safety performance is improved.
Preferably, the heating control system further comprises two editable logic controllers, the bottom of the air supply bottle on each heating control system is provided with a weight monitor electrically connected with the editable logic controller, the air supply bottle is placed on the weight monitor, and the editable logic controller is electrically connected with the heating controller on one heating control system. The programmable logic controller can calculate the weight difference of the two gas supply bottles according to signals transmitted by the two weight monitors (such as a platform scale) and compare the weight difference with a preset weight difference value (important difference value can be set to be not more than plus or minus 5%), so that the programmable logic controller takes the weight of the residual liquid gas of the gas supply bottles as a judgment basis, drives and adjusts the heating or cooling bottles of the heating controller to control the volatilization amount of the liquid gas in the gas supply bottles, so as to reduce the weight difference of the two gas supply bottles, more effectively control the gas in the two gas supply bottles to finish at the same time, and effectively control the synchronous supply of a plurality of gas supply bottles.
The invention also provides a liquid gas supply heating control method, which comprises a gas supply bottle heating control method, a safety protection control method and a gas supply bottle weight adjusting method, wherein the gas supply bottle heating control method comprises the following specific steps:
step one, in the gas supply process of a gas supply bottle, monitoring the gas temperature output by the gas supply bottle in real time by a temperature sensor;
transmitting the temperature information acquired by the first temperature sensor to a heating controller;
and step three, the heating controller drives the heating device to be properly adjusted according to the received information.
Through the steps, the purpose of maintaining the pressure stability of the supplied gas is achieved, and the gas supply pressure oscillation caused by the gas supply bottle temperature state judgment error caused by factors such as the thermal resistance of the gas supply bottle, the external environment and the like when the temperature sensor arranged outside the gas supply bottle is utilized in the prior art is effectively avoided.
Preferably, the safety protection control methods are three, the first safety protection control method is to receive the gas pressure value in the gas pipeline collected by the pressure sensor through the power-off controller, judge whether the pressure in the gas supply bottle is normal or not, and transmit a power-off signal to the heating controller if the pressure is abnormal, so as to avoid the danger or the dry burning phenomenon of an empty bottle caused by overlarge pressure of the gas supply bottle when the operation of the temperature sensor is failed, thereby being beneficial to improving the safety performance; the second safety protection control method is that the surface temperature of the air supply bottle is monitored by the temperature sensor II, and a signal is transmitted to the heating controller, and the heating controller drives the heating device to be properly adjusted according to the received signal so as to avoid the overheating of the heating device from exceeding the temperature of the load of the air supply bottle, thereby being beneficial to improving the safety performance; the third safety protection control method is to monitor the heating device in real time through the overheat protection switch and judge whether the temperature exceeds the highest temperature of the load of the heating device, if the monitored temperature exceeds the highest temperature of the load of the heating device, the overheat protection switch transmits a signal to the power-off controller, the power-off controller transmits a power-off signal to the heating controller, and the heating controller drives the heating device to stop heating, so as to avoid the heating device from being burnt due to overhigh temperature, thereby being beneficial to improving the safety performance.
Preferably, the method for adjusting the weight of the air cylinder comprises the following specific steps:
step A, a weight monitor monitors the weight of a corresponding air supply bottle in real time and transmits a signal to an editable logic controller;
step B, calculating the weight difference of the two gas supply bottles according to the weight of the residual liquid gas in the gas supply bottles on the two heating control systems by the editable logic controller, and comparing the weight difference with a preset weight difference value;
and step C, when the weight difference of the two air supply bottles exceeds a preset weight difference value, the programmable logic controller transmits a signal to the heating controller on one heating control system, and the heating controller drives and adjusts the heating device.
Through the steps, the editable logic controller can calculate the weight difference of the two gas supply bottles according to the signals transmitted by the two weight monitors and compare the weight difference with a preset weight difference value (the important difference value can be set to be not more than plus or minus 5 percent), so that the editable logic controller takes the weight of the residual liquid gas of the gas supply bottles as a judgment basis, drives and adjusts the heating or cooling bottles of the heating controller to control the volatilization amount of the liquid gas in the gas supply bottles, so as to reduce the weight difference of the two gas supply bottles, and achieve the purpose of more effectively controlling the gas in the two gas supply bottles to finish at the same time.
The invention has the beneficial effects that: the purpose of maintaining the pressure stability of the supplied gas is achieved, and the gas temperature state judgment error of the gas supply bottle and the gas supply pressure oscillation caused by the gas temperature state judgment error of the gas supply bottle due to factors such as the thermal resistance of the gas supply bottle, the external environment and the like when the temperature sensor arranged outside the gas supply bottle is utilized in the prior art are effectively avoided; the joint degree of the heating device and the air supply bottle is improved, and the heating efficiency is improved; the safety protection system has various protection systems, is beneficial to improving the safety performance and can provide more perfect safety; can effectively control the synchronous supply of a plurality of air supply bottles.
Drawings
FIG. 1 is a schematic diagram of a prior art heating system;
FIG. 2 is a schematic view of a liquid gas supply heating control system according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the heating apparatus;
FIG. 4 is a schematic diagram of a liquid gas supply heating control system according to an embodiment.
In the figure: 10. the system comprises a gas supply bottle body, a heating structure, a temperature sensor 14, a gas supply system 16, a gas supply bottle 20, a gas supply station 22, a gas pipeline 24, a gas pipeline 26, a temperature sensor I, a heating controller 28, a heating device 30, a pressure sensor 32, a positioning sheet 33, a power-off controller 34, an overheating protection switch 36, a temperature sensor II, a temperature sensor 38, an editable logic controller 40 and a weight monitor.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 2, the liquid gas supply heating control system comprises a gas supply station 22 and at least one heating control system, wherein the heating control system comprises a heating controller 28 and a gas supply bottle 20, a gas pipeline 24 is arranged on the gas supply bottle 20, the gas supply bottle 20 is connected with the gas supply station 22 through the gas pipeline 24, a first temperature sensor 26 is arranged in the gas pipeline 24, the first temperature sensor 26 is electrically connected with the heating controller 28, the first temperature sensor 26 is detachably connected with the gas pipeline 24, a heating device 30 is arranged at the bottom of the gas supply bottle 20, the heating device 30 is detachably connected with the gas supply bottle 20, and the heating device 30 is electrically connected with the heating controller 28.
As shown in fig. 2, one end of the gas line 24 is detachably connected to the gas cylinder 20, the other end of the gas line 24 is detachably connected to the gas supply station 22, and a temperature sensor one 26 is located in the end of the gas line 24 detachably connected to the gas cylinder 20.
As shown in fig. 3, heating device 30 includes a heater blanket and a spacer 33, spacer 33 is shaped to be arcuate and to match the bottom of supply bottle 20, and the heater blanket is removably coupled to supply bottle 20 via spacer 33 and is electrically coupled to heater controller 28.
As shown in fig. 2, the heating control system further includes a power-off controller 34, the gas pipeline 24 is provided with a pressure sensor 32, the pressure sensor 32 is detachably connected to the gas pipeline 24, and the pressure sensor 32 is electrically connected to the heating controller 28 through the power-off controller 34.
As shown in fig. 2, a second temperature sensor 37 is disposed on the air bottle 20, the second temperature sensor 37 is detachably connected to the surface of the air bottle 20, and the second temperature sensor 37 is electrically connected to the heating controller 28.
As shown in fig. 2, an overheat protection switch 36 is detachably mounted in the heating apparatus 30, and the overheat protection switch 36 is electrically connected to the heating controller 28 through the power-off controller 34.
As shown in fig. 4, the heating control system further comprises two editable logic controllers 38, the bottom of the air supply bottle 20 on each heating control system is provided with a weight monitor 40 electrically connected with the editable logic controller 38, the air supply bottle 20 is placed on the weight monitor 40, and the editable logic controller 38 is electrically connected with the heating controller 28 on one heating control system.
The invention also provides a liquid gas supply heating control method, which comprises a gas supply bottle 20 heating control method, a safety protection control method and a gas supply bottle 20 weight adjusting method, wherein the gas supply bottle 20 heating control method comprises the following specific steps:
step one, in the process of supplying gas to the gas supply bottle 20, monitoring the temperature of the gas output by the gas supply bottle 20 in real time by a first temperature sensor 26;
step two, the temperature information acquired by the first temperature sensor 26 is transmitted to the heating controller 28;
and step three, the heating controller 28 drives the heating device 30 to perform appropriate adjustment according to the received information.
The first safety protection control method is to receive the gas pressure value in the gas pipeline 24 collected by the pressure sensor 32 through the power-off controller 34, and judge whether the pressure in the gas cylinder 20 is normal, if the pressure is not normal, the power-off signal is transmitted to the heating controller 28; the second safety protection control method is that the surface temperature of the air supply bottle 20 is monitored through a second temperature sensor 37, a signal is transmitted to the heating controller 28, and the heating controller 28 drives the heating device 30 to carry out proper adjustment according to the received signal; the third safety protection control method is to monitor the heating device 30 in real time through the overheating protection switch 36, and determine whether the maximum temperature of the load of the heating device 30 is exceeded, if the monitored temperature exceeds the maximum temperature of the load of the heating device 30, the overheating protection switch 36 transmits a signal to the power-off controller 34, the power-off controller 34 transmits a power-off signal to the heating controller 28, and the heating controller 28 drives the heating device 30 to stop heating.
The method for adjusting the weight of the air supply bottle 20 comprises the following specific steps:
step A, the weight monitor 40 monitors the weight of the corresponding cylinder 20 in real time and transmits a signal to the editable logic controller 38;
step B, the editable logic controller 38 calculates the weight difference of the two gas supply bottles 20 according to the weight of the residual liquid gas in the gas supply bottles 20 on the two heating control systems, and compares the weight difference with a preset weight difference value;
step C, when the weight difference between the two air bottles 20 exceeds the preset weight difference value, the programmable logic controller 38 transmits a signal to the heating controller 28 of one of the heating control systems, and the heating controller 28 drives the adjusting heating device 30.
The present invention utilizes the characteristic that the saturation pressure depends on the temperature when the liquid gas is in a saturation state, and obtains stable saturation pressure by controlling the stability of the saturation temperature, so as to supply the gas supply station 22 with gas. As shown in fig. 2, the present invention utilizes a temperature sensor 26 to timely detect the temperature of the gas output from the gas cylinder 20, and further transmits a signal to a heating controller 28. the heating controller 28 drives a heating device 30 to perform an appropriate adjustment according to the received signal, so as to maintain the pressure stability of the supplied gas.
The present invention provides three advanced safeguards to avoid the danger associated with the improper operation of the first temperature sensor 26 disposed in the gas line 24. The first protection device monitors the gas pressure in the gas pipeline 24 in real time through the pressure sensor 32, and transmits a signal to the power-off controller 34, the power-off controller 34 judges whether the pressure is too high or too low, if so, the first protection device transmits a power-off signal to the heating controller 28, so as to avoid the phenomenon that the gas supply bottle 20 is dangerous or the empty bottle is burnt due to too high pressure when the temperature sensor 26 fails to operate, and thus, the safety performance is improved.
The second type of guard simultaneously monitors the temperature of the surface of the cylinder 20 via the second temperature sensor 37 and transmits a signal to the heater controller 28 to prevent overheating of the heater 30 from exceeding the load to which the cylinder 20 can be loaded, thereby facilitating improved safety. The third protection device determines whether the temperature of the heating device 30 exceeds the temperature of the load, and if so, transmits a signal to the heating controller 28 to prevent the heating device 30 from being burnt due to the overhigh temperature, thereby improving the safety performance.
In the embodiment shown in fig. 4, the present invention may also use two gas supply bottles 20 having the same gas to supply gas to the gas supply station 22. At this time, in order to effectively monitor the weight of the remaining liquid gas in each gas cylinder 20 for adjusting the heating temperature of each gas cylinder 20, the liquid gas supply heating control system of the present invention further comprises a gas supply adjusting system. The gas supply regulating system calculates the weight difference between the two gas supply cylinders 20 according to the signals transmitted by the two weight monitors 40 by the editable logic controller 38, and compares the calculated weight difference with a preset weight difference value (the important difference value can be set to be not more than plus or minus 5%), so that the editable logic controller 38 drives and regulates the heating or cooling cylinder of the heating controller 28 based on the weight of the residual liquid gas in the gas supply cylinders 20 to control the volatilization amount of the liquid gas in the gas supply cylinders 20, so as to reduce the weight difference between the two gas supply cylinders 20, thereby more effectively controlling the gas in the two gas supply cylinders 20 to end at the same time, and effectively controlling the synchronous supply of the two gas supply cylinders 20. In view of the above, the present invention provides a novel liquid gas heating control system, which provides a stable supply gas pressure by the cooperation of a temperature sensor 26 for detecting the gas temperature in the gas pipeline 24, a heating controller 28 and a heating device 30. Furthermore, the liquid gas supply heating control system of the present invention further comprises three protection devices and a gas supply regulating system for use with a plurality of gas supply bottles 20, which can provide more complete safety and effectively reduce the cost.

Claims (10)

1. The utility model provides a liquid gas supply heating control system, characterized by includes gaseous supply station (22) and at least one heating control system, heating control system includes heating controller (28) and gas supply bottle (20), be equipped with gas line (24) on gas supply bottle (20), gas supply bottle (20) are connected with gaseous supply station (22) through gas line (24), be equipped with temperature sensor (26) in gas line (24), temperature sensor (26) are connected with heating controller (28) electricity, temperature sensor (26) can be dismantled with gas line (24) and be connected, the bottom of gas supply bottle (20) is equipped with heating device (30), heating device (30) can be dismantled with gas supply bottle (20) and be connected, heating device (30) are connected with heating controller (28) electricity.
2. A liquid gas supply heating control system as claimed in claim 1, wherein one end of said gas line (24) is removably connected to the gas supply bottle (20), the other end of said gas line (24) is removably connected to the gas supply station (22), and said first temperature sensor (26) is located in the end of the gas line (24) removably connected to the gas supply bottle (20).
3. A liquid gas supply heating control system as claimed in claim 1, wherein said heating means (30) comprises a heating blanket and a positioning tab (33), said positioning tab (33) being arcuate in shape and matching the bottom of the gas supply bottle (20), said heating blanket being removably connected to the gas supply bottle (20) by the positioning tab (33), said heating blanket being electrically connected to the heating controller (28).
4. A liquid gas supply heating control system as claimed in claim 1, 2 or 3, further comprising a power-off controller (34), wherein the gas line (24) is provided with a pressure sensor (32), the pressure sensor (32) is detachably connected to the gas line (24), and the pressure sensor (32) is electrically connected to the heating controller (28) through the power-off controller (34).
5. A liquid gas supply heating control system as claimed in claim 4, wherein the gas supply bottle (20) is provided with a second temperature sensor (37), the second temperature sensor (37) is detachably connected with the surface of the gas supply bottle (20), and the second temperature sensor (37) is electrically connected with the heating controller (28).
6. A liquid gas supply heating control system as claimed in claim 5, wherein an overheat protection switch (36) is removably mounted in the heating unit (30), the overheat protection switch (36) being electrically connected to the heating controller (28) via a power-off controller (34).
7. A liquid gas supply heating control system as claimed in claim 6, further comprising two programmable logic controllers (38), wherein the bottom of the gas supply bottle (20) of each of the two programmable logic controllers is provided with a weight monitor (40) electrically connected to the programmable logic controller (38), the gas supply bottle (20) is placed on the weight monitor (40), and the programmable logic controller (38) is electrically connected to the heating controller (28) of one of the programmable logic controllers.
8. The liquid gas supply heating control method according to claim 7, comprising a gas cylinder (20) heating control method, a safety protection control method and a gas cylinder (20) weight adjustment method, wherein the gas cylinder (20) heating control method comprises the following specific steps:
step one, in the gas supply process of the gas supply bottle (20), monitoring the gas temperature output by the gas supply bottle (20) in real time by a first temperature sensor (26);
step two, temperature information acquired by the temperature sensor I (26) is transmitted to a heating controller (28);
and step three, the heating controller (28) drives the heating device (30) to perform proper adjustment according to the received information.
9. The liquid gas supply heating control method as claimed in claim 8, wherein there are three safety protection control methods, the first safety protection control method is to receive the gas pressure value in the gas pipeline (24) collected by the pressure sensor (32) through the power-off controller (34), and judge whether the pressure in the gas supply cylinder (20) is normal, if the pressure is not normal, then transmit the power-off signal to the heating controller (28); the second safety protection control method is that the surface temperature of the air supply bottle (20) is monitored through a second temperature sensor (37), signals are transmitted to the heating controller (28), and the heating controller (28) drives the heating device (30) to be adjusted properly according to the received signals; the third safety protection control method is that the overheating protection switch (36) is used for monitoring the heating device (30) in real time, whether the highest temperature of the load of the heating device (30) is exceeded or not is judged, if the monitored temperature exceeds the highest temperature of the load of the heating device (30), the overheating protection switch (36) transmits a signal to the power-off controller (34), the power-off controller (34) transmits a power-off signal to the heating controller (28), and the heating controller (28) drives the heating device (30) to stop heating.
10. The heating control method for supplying liquid gas as claimed in claim 8, wherein the weight adjustment method for the gas cylinder (20) comprises the steps of:
step A, a weight monitor (40) monitors the weight of the corresponding gas cylinder (20) in real time and transmits a signal to an editable logic controller (38);
step B, the editable logic controller (38) calculates the weight difference of the two gas supply bottles (20) according to the weight of the residual liquid gas in the gas supply bottles (20) on the two heating control systems, and compares the weight difference with a preset weight difference value;
and step C, when the weight difference of the two air supply bottles (20) exceeds a preset weight difference value, the programmable logic controller (38) transmits a signal to the heating controller (28) on one heating control system, and the heating controller (28) drives and adjusts the heating device (30).
CN202210539249.4A 2022-05-18 2022-05-18 Liquid gas supply heating control system and control method Pending CN114893716A (en)

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CN113623073A (en) * 2021-08-31 2021-11-09 荆门宏图特种飞行器制造有限公司 Ignition system for liquefied petroleum gas
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2901004Y (en) * 2004-12-10 2007-05-16 汤玉梅 Double control type liquefied gas cylinder safety gasifier
US20100018249A1 (en) * 2008-07-24 2010-01-28 Kenneth Leroy Burgers Simultaneous gas supply from multiple bsgs
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