CN101968665A - Low-temperature protection control system for cryogenic vessel - Google Patents
Low-temperature protection control system for cryogenic vessel Download PDFInfo
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- CN101968665A CN101968665A CN 201010500049 CN201010500049A CN101968665A CN 101968665 A CN101968665 A CN 101968665A CN 201010500049 CN201010500049 CN 201010500049 CN 201010500049 A CN201010500049 A CN 201010500049A CN 101968665 A CN101968665 A CN 101968665A
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- cooling container
- deep cooling
- evaporator
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Abstract
The invention discloses a low-temperature protection control system for a cryogenic vessel, wherein, the cryogenic vessel is connected with an evaporator and then connected with a gas use point; a pipe between the cryogenic vessel and the evaporator is provided with a valve mechanism; a pipe between the evaporator and the gas use point is equipped with a temperature sensor; and a controller controls the valve mechanism according to a temperature signal of the temperature sensor. The low-temperature protection control system of the invention can monitor the medium temperature condition after evaporation and adjust drainage flow timely so that the medium in the cryogenic vessel can be used more safely after evaporation, thus avoiding production safety hazard.
Description
Technical field
The present invention relates to a kind of safety control system, relate in particular to a kind of deep cooling container low-temperature protection system in use.
Background technology
At present, deep cooling container is when using, generally connect deep cooling container and air evaporator or electric heater or other heating arrangements by pipeline, change the liquid medium in the deep cooling container into gas, by pipeline gas is delivered to the use point again, between deep cooling container and air evaporator or electric heater or other heating arrangements, attachment device is not set usually, or a liquid pump only is set, may be low excessively when liquid medium is through air evaporator or electric heater or other heating arrangements like this owing to evaporator or electric heater or other heating arrangement evaporation capacity, it is insufficient that liquid medium gasifies, deliver to use point or gas in be doped with liquid medium, this will bring hidden danger to production safety, because the liquid medium that mixes in the gas is being delivered to when using point or intermediate buffer to use, the low temperature that the liquid medium that mixes produces makes and uses the equipment impact flexibility of point or intermediate buffer to descend, may make equipment produce brittle rupture, these liquid can moment speed expansion become gas (volume can expand more than 1000 times) simultaneously, produce high pressure simultaneously the use of using point or intermediate buffer is caused potential safety hazard, especially for the use of some hazardous gases, it is particularly outstanding that such potential safety hazard seems.
Summary of the invention
The technical problem to be solved in the present invention is to realize a kind of deep cooling container in use, for the situation of gasification system and the device of controlling safely, whether monitoring fully gasifies through the liquid medium of evaporator, and can guarantee that it fully gasifies by control liquid medium flow.
To achieve these goals; the technical solution used in the present invention is: deep cooling container low-temperature protection control system; the deep cooling container of this control system uses between point with gas with evaporator, evaporator and all is connected by pipeline; pipeline between deep cooling container and evaporator is provided with valve mechanism; evaporator and gas use the pipeline between point to be provided with temperature sensor, and controller is according to the temperature signal by-pass valve control mechanism folding of temperature sensor.
Described evaporator is an electric heater.
Described controller adopts PID (proportion integration differentiation control) controller.
Described controller is provided with input port and demonstration, warning device.
Described valve mechanism is made up of topworks and variable valve.
Be provided with liquid pump between described deep cooling container and valve mechanism by controller control.
The protection control method of deep cooling container low-temperature protection control system, this method comprises the following step:
A) temperature sensor receives from the gas temperature of evaporator output, and temperature signal is passed to controller;
B) when controller receives temperature signal less than 10 ℃, variable valve reduces aperture to be regulated;
C) when controller received temperature signal and is lower than 0 ℃, variable valve cut out fully, and started warning system and report to the police, under the situation that is provided with the liquid pump, and closing liquid pump simultaneously.
The invention has the advantages that: the liquid evaporation situation is monitored and in time adjusted fluid flow, make that deep cooling container liquid evaporation process is safer, avoided potential safety hazard.
Description of drawings
Below the content of each width of cloth accompanying drawing expression of instructions of the present invention and the mark among the figure are made brief description:
Fig. 1 is a deep cooling container low-temperature protection control system theory diagram;
Fig. 2 is a deep cooling container low-temperature protection control system FB(flow block);
Mark among the above-mentioned figure is:
1, deep cooling container; 2, liquid pump; 3, variable valve; 4, topworks; 5, demonstration, alarm device; 6, controller; 7, evaporator; 8, temperature sensor; 9, gas uses point; 10, input port.
Embodiment
Contrast accompanying drawing below, by description to example, the effect of mutual alignment between the shape of the embodiment of patent of the present invention such as each related member, structure, the each several part and annexation, each several part and principle of work, manipulate method etc., be described in further detail, inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
Deep cooling container low-temperature protection control system theory diagram as shown in Figure 1 as can be known; the deep cooling container 1 of this protection control system is connected with using point 9 or fill platform through evaporator 7 or the evaporator that has an electric heater; deep cooling container 1 and evaporator 7 or the pipeline that has between the evaporator of electric heater are provided with valve mechanism; when relating to the permanent gas cylinder filling; also establish meeting liquid pump 2; evaporator 7 or the evaporator that has an electric heater are provided with temperature sensor 8 with the pipeline that uses point 9 or fill interstation, and controller 6 is according to the temperature signal by-pass valve control mechanism of temperature sensor 8.Described deep cooling container 1 can be provided with the safety return-flow valve with valve mechanism.
Above-mentioned valve mechanism can adopt following technical proposal:
One, valve mechanism uses solenoid valve, and solenoid valve carries out break-make to the circulation of liquid medium in the pipeline after the switching signal that receives controller 6.The solenoid valve low price, easy to install, but solenoid valve can only be opened or closure, can't realize accuracy controlling, and flow velocity is limited.
Two, valve mechanism is made up of topworks 4 and variable valve 3, and topworks 4 switch degree to variable valve 3 behind the signal that receives controller 6 is regulated, the flow of control deep cooling container 1 liquid medium.Described topworks 4 can adopt pneumatic or electric operator, and for the flow control of some danger medium, pneumatic actuator is more safe, can be just becomes the driving source of the gas after self source of the gas decompression.
At present product adopts the valve mechanism that topworks 4 and variable valve 3 are formed mostly, and performance element adopts two schemes: form valve mechanism by high pressure Direct Travel balanced type cage type regulating valve and intelligent Direct Travel topworks for one; Another is angle transposition variable valve and intelligent pneumatic angle transposition topworks assembled unit, even if also can pass through variation of temperature under the condition of high pressure, the regulation valve body flow makes under same evaporative power, guarantee air evaporator 7 outlet temperatures, thereby satisfy the safe operation of controlled system.
The controller 6 main PID technology that adopt recited above specifically can be used the little processing PID controller of the prosperous brightness SWP series in Hong Kong.PID intelligent digital low-temperature protection system applies ratio, differential and integration control principle technology; using microprocessor calculates automatically to input signal and output signal; adjust and control; it is the automation control system of a maturation; reliable closed loop automatic control means are adopted in its operation; need carry out under the high precision process control condition temperature controlled topworks position, this PID controlling schemes is most economical, also is the most advanced reliable system design of technology.
According to the deep cooling container low-temperature protection control system FB(flow block) shown in Figure 2 protection control method of deep cooling container low-temperature protection control system as can be known, this method comprises the following step:
A) temperature sensor receives from the gas temperature of evaporator 7 outputs, and temperature signal is passed to controller 6;
B) when controller 6 receives temperature signal less than 10 ℃, variable valve 3 reduces aperture to be regulated;
C) when controller 6 received temperature signals and is lower than 0 ℃, variable valve 3 cut out fully, and started warning system and report to the police, under the situation that is provided with liquid pump 2, and closing liquid pump 2 simultaneously.
Detailed process is: after system powered on, device carried out self check, and digital watch shows air evaporator 7 or has the current temperature value of the evaporator of electric heater; When controlled system operation, temperature sensor 8 is uploaded to the PID controller with detected analog electrical signal, after PID carries out the A/D conversion, simultaneously the data of collecting and reference value is compared the central processing unit that the result is transferred to the PID controller and handles; Central processing unit is to input signal, user's setup parameter carries out computing, carrying out D/A again handles, to control simulating signal and export to topworks 4, topworks's 4 regulating and controlling valves, 3 apertures or close, the controlled variable of control system is just carried out the control of aperture with 0 ℃-10 ℃ interval to variable valve, controller 6 is output as the change of 4-20mA standard signal and send control, this is a dynamically amount, and variation corresponding to the interval of 0 ℃-10 ℃ in pipeline, when being lower than 10 ℃ of the design temperature upper limits as the controlled system medium temperature, output current begins to be reduced by 20mA, air evaporator 7 or when having medium temperature that the evaporator outlet end of electric heater detected and being lower than 10 ℃, output current is higher than the standard signal upper limit, topworks 4 begins to drive variable valve 3 adjusting valve port opening and reduces, no longer reduce as detected temperature, topworks is in the position state of protecting, control valve opening is constant, go up as system temperature, the control signal electric current also rises, return to 20mA as electric current, the aperture of valve is the system's of returning to state that brings into operation also; Continue to reduce as detected temperature, Control current also will continue to reduce, topworks 4 also will be accordingly further reduces the aperture of variable valve, reduce to 0 ℃ of the lower control limit of setting as the controlled system temperature, corresponding Control current 4mA will close variable valve and drive warning device, when liquid pump 2, simultaneously can closing liquid pump 2.The PID controller receives the signal of topworks 4 feedback in output signal, central processing unit compares and treats feedback signal and processing signals again, regulates with precision confirming.
When valve mechanism adopted solenoid valve, controller 6 directly cut out solenoid valve when the reception temperature signal is lower than 0 ℃, and gives the alarm.
The demonstration of this control system, alarm device 5 are to be provided with the two paths of LED numeral at the control box panel to show, are used to show detected current controlled system pipeline medium temperature and explicit user design temperature; Topworks's 4 operation conditionss show the aperture that adopts light beam number percent form image expression variable valve 3 valve ports, and the user can very observe the aperture of topworks 4 intuitively or close situation; Warning device adopts hummer.Input port 10 adopts membrane keyboard to carry out parameter setting, resets operations such as zero clearing.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (8)
1. deep cooling container low-temperature protection control system; the deep cooling container of this control system (1) uses between point (9) with gas with evaporator (7), evaporator (7) and all is connected by pipeline; it is characterized in that: the pipeline between deep cooling container (1) and evaporator (7) is provided with valve mechanism; evaporator (7) and gas use the pipeline between point (9) to be provided with temperature sensor (8), and controller (6) is according to the temperature signal by-pass valve control mechanism folding of temperature sensor (8).
2. deep cooling container low-temperature protection control system according to claim 1 is characterized in that: described evaporator (7) is for having the evaporator of electric heater unit.
3. deep cooling container low-temperature protection control system according to claim 1 is characterized in that: described controller (6) adopts the PID controller.
4. according to claim 1 or 3 described deep cooling container low-temperature protection control system, it is characterized in that: described controller (6) is provided with input port (10) and demonstration, warning device (5).
5. deep cooling container low-temperature protection control system according to claim 4 is characterized in that: described input port (10) is a touch keyboard.
6. deep cooling container low-temperature protection control system according to claim 1 is characterized in that: described valve mechanism is made up of topworks (4) and variable valve (3).
7. deep cooling container discharge opeing control system according to claim 1 is characterized in that: be provided with the liquid pump (2) by controller (6) control between described deep cooling container (1) and valve mechanism.
8. the protection control method of deep cooling container low-temperature protection control system, this method comprises the following step:
A) temperature sensor receives from the gas temperature of evaporator (7) output, and temperature signal is passed to controller (6);
B) when controller (6) receives temperature signal less than 10 ℃, variable valve (3) reduces aperture to be regulated;
C) when controller (6) received temperature signal and is lower than 0 ℃, variable valve (3) cut out fully, and started warning system and report to the police, under the situation that is provided with liquid pump (2), and closing liquid pump (2) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010500049 CN101968665A (en) | 2010-09-29 | 2010-09-29 | Low-temperature protection control system for cryogenic vessel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010500049 CN101968665A (en) | 2010-09-29 | 2010-09-29 | Low-temperature protection control system for cryogenic vessel |
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| CN101968665A true CN101968665A (en) | 2011-02-09 |
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| CN 201010500049 Pending CN101968665A (en) | 2010-09-29 | 2010-09-29 | Low-temperature protection control system for cryogenic vessel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853203A (en) * | 2014-03-19 | 2014-06-11 | 中国科学院高能物理研究所 | Cooling device |
| CN112204299A (en) * | 2018-04-06 | 2021-01-08 | 大力士股份有限公司 | Tank device and material level control method |
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| CN1664372A (en) * | 1997-09-29 | 2005-09-07 | 科普兰公司 | An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| CN2757192Y (en) * | 2004-09-24 | 2006-02-08 | 陕西科技大学 | Intelligent water supply temperature regulator |
| CN101542186A (en) * | 2006-09-29 | 2009-09-23 | 普莱克斯技术有限公司 | Low vapor pressure high purity gas delivery system |
| CN101706187A (en) * | 2009-09-23 | 2010-05-12 | 上海共和真空技术有限公司 | Water flow regulating device for refrigerating system of freeze dryer |
| CN201853147U (en) * | 2010-09-29 | 2011-06-01 | 杨敏春 | Cryogenic container low-temperature protecting and controlling system |
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2010
- 2010-09-29 CN CN 201010500049 patent/CN101968665A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664372A (en) * | 1997-09-29 | 2005-09-07 | 科普兰公司 | An adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
| CN2757192Y (en) * | 2004-09-24 | 2006-02-08 | 陕西科技大学 | Intelligent water supply temperature regulator |
| CN101542186A (en) * | 2006-09-29 | 2009-09-23 | 普莱克斯技术有限公司 | Low vapor pressure high purity gas delivery system |
| CN101706187A (en) * | 2009-09-23 | 2010-05-12 | 上海共和真空技术有限公司 | Water flow regulating device for refrigerating system of freeze dryer |
| CN201853147U (en) * | 2010-09-29 | 2011-06-01 | 杨敏春 | Cryogenic container low-temperature protecting and controlling system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853203A (en) * | 2014-03-19 | 2014-06-11 | 中国科学院高能物理研究所 | Cooling device |
| CN112204299A (en) * | 2018-04-06 | 2021-01-08 | 大力士股份有限公司 | Tank device and material level control method |
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Owner name: ANHUI HONGJI METER + VALVE CO., LTD. Free format text: FORMER OWNER: YANG MINCHUN Effective date: 20110923 Free format text: FORMER OWNER: ANHUI HONGJI METER CO., LTD. |
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Free format text: CORRECT: ADDRESS; FROM: 241000 WUHU, ANHUI PROVINCE TO: 232100 CHUZHOU, ANHUI PROVINCE |
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Effective date of registration: 20110923 Address after: 232100 Anhui, Xicheng District, Tianchang, Tian Cha Road No. 77 Applicant after: Anhui Acer instrument valve Co. Ltd. Address before: 241000 Anhui city of Wuhu province Tiefo Garden District of Jinghu C-15F Applicant before: Yang Minchun Co-applicant before: Anhui Hongji Instrument Co., Ltd. |
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Application publication date: 20110209 |