CN110548734A - Collector tube aging device and flow control method for collector tube aging - Google Patents
Collector tube aging device and flow control method for collector tube aging Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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Abstract
本发明涉及一种能够避免在吹扫气体的流量过低或过高的情况下进行捕集管老化的捕集管老化装置及捕集管老化用流量控制方法。该捕集管老化装置通过对捕集管通入吹扫气体并加热来将所述捕集管老化，包括：流量输出单元，其具有一个供所述吹扫气体输入的流量输入端和多个供所述吹扫气体输出的流量输出端，所述流量输出端与所述捕集管连通；温控单元，其对所述流量输出单元和所述捕集管进行加热并进行温度控制；警报单元，其用于输出警报；以及控制单元，其对所述温控单元和所述警报单元进行控制，在所述流量输出端的当前输出流量低于流量下限值或高于流量上限值的情况下，使所述警报单元输出警报。
The invention relates to a trapping tube aging device and a flow control method for trapping tube aging which can avoid trapping tube aging when the flow rate of purge gas is too low or too high. The trapping tube aging device ages the trapping tube by feeding purge gas into the trapping tube and heating it, including: a flow output unit, which has a flow input port for the purge gas input and a plurality of A flow output end for the output of the purge gas, the flow output end communicates with the collection pipe; a temperature control unit, which heats and controls the temperature of the flow output unit and the collection pipe; an alarm unit, which is used to output an alarm; and a control unit, which controls the temperature control unit and the alarm unit, and the current output flow at the flow output terminal is lower than the flow lower limit or higher than the flow upper limit case, the alarm unit is made to output an alarm.
Description
技术领域technical field
本发明涉及捕集管老化装置及捕集管老化用流量控制方法The invention relates to a trapping tube aging device and a flow control method for trapping tube aging
背景技术Background technique
在色谱仪器分析领域，热脱附捕集管是实验室中常用的采样器材，使用后往往需要通过老化来去除捕集管中的样品残留。捕集管的老化是指在高温及一定的惰性气流(例如氮气等)下将捕集管内的残留物吹扫出去，使捕集管获得重生的过程。通常将吹扫气体流量设定为50～80ml(单根捕集管)。In the field of chromatographic instrument analysis, the thermal desorption trap tube is a commonly used sampling device in the laboratory. After use, it often needs to be aged to remove the sample residue in the trap tube. The aging of the trapping tube refers to the process of purging the residue in the trapping tube under high temperature and a certain inert gas flow (such as nitrogen, etc.), so that the trapping tube can be regenerated. Usually the purge gas flow rate is set to 50 ~ 80ml (single trap tube).
发明内容Contents of the invention
要解决的技术问题technical problem to be solved
在现有技术中，例如如图1所示，捕集管老化装置100包括流量输出单元110和压力表120。流量输出单元110具有一个供吹扫气体输入的流量输入端111和多个(图中例示为7个)供吹扫气体输出的流量输出端112，进行老化的多个捕集管(未图示)分别设置在各流量输出端112上并与流量输出端112连通，以使得从上述流量输出端112输出的吹扫气体全部通过该捕集管进行吹扫。在进行老化时，使用者通过观察压力表120来判定捕集管内是否有吹扫气体流过以及吹扫气体的大致流量。In the prior art, for example, as shown in FIG. 1 , a trap tube aging device 100 includes a flow output unit 110 and a pressure gauge 120 . The flow output unit 110 has a flow input port 111 for purge gas input and multiple (7 in the figure) flow output ports 112 for purge gas output, and a plurality of collecting tubes (not shown) for aging ) are respectively arranged on each flow output port 112 and communicated with the flow output port 112, so that all the purge gas output from the flow output port 112 passes through the trapping pipe for purging. During aging, the user can judge whether there is a purge gas flowing through the collection tube and the approximate flow rate of the purge gas by observing the pressure gauge 120 .
但是，通常捕集管的老化需要数个小时甚至更长的时间，在此过程中使用者不可能一直对压力表120保持关注。若在老化过程中吹扫气体被切断或者用完，而使用者此时没有看到压力表120指针的变化并及时应对，则会导致老化能力变弱，捕集管内的残留物不能被完全吹扫出去而是在捕集管内慢慢累积，最终降低了捕集管的可使用次数。另一方面，若吹扫气体的流量过大，不仅浪费吹扫气体导致成本增加，还会有捕集管中的填充物被吹动或吹出导致捕集管损坏的风险。However, it usually takes several hours or even longer to age the trapping tube, during which the user cannot keep paying attention to the pressure gauge 120 all the time. If the purge gas is cut off or used up during the aging process, and the user does not see the change of the pointer of the pressure gauge 120 and respond in time, the aging ability will be weakened, and the residue in the collection tube cannot be completely blown out. Swept out but accumulates slowly in the trap tube, eventually reducing the usable times of the trap tube. On the other hand, if the flow rate of the purge gas is too large, not only is the purge gas wasted and the cost increases, but also there is a risk that the filler in the collection tube is blown or blown out, resulting in damage to the collection tube.
用于解决技术问题的技术方法Technical methods used to solve technical problems
本发明是为了解决上述技术问题而做出的，提供一种捕集管老化装置，其通过对捕集管通入吹扫气体并加热来将所述捕集管老化，所述捕集管老化装置的特征在于，包括：流量输出单元，其具有一个供所述吹扫气体输入的流量输入端和多个供所述吹扫气体输出的流量输出端，所述流量输出端与所述捕集管连通；温控单元，其对所述流量输出单元和所述捕集管进行加热并进行温度控制；警报单元，其用于输出警报；以及控制单元，其对所述温控单元和所述警报单元进行控制，在所述流量输出端的当前输出流量低于流量下限值或高于流量上限值的情况下，使所述警报单元输出警报。The present invention is made to solve the above-mentioned technical problems, and provides a trapping tube aging device, which ages the trapping tube by feeding purge gas into the trapping tube and heating it, and the trapping tube aging The feature of the device is that it includes: a flow output unit, which has a flow input end for the input of the purge gas and a plurality of flow output ends for the output of the purge gas, the flow output end and the trapping tube communication; a temperature control unit, which heats the flow output unit and the trapping pipe and performs temperature control; an alarm unit, which is used to output an alarm; and a control unit, which controls the temperature control unit and the The alarm unit controls to make the alarm unit output an alarm when the current output flow of the flow output terminal is lower than the flow lower limit or higher than the flow upper limit.
在上述捕集管老化装置中，优选的是，还包括压力传感单元，其设置在所述流量输出单元的上游，与所述流量输入端连通，用于测量所述流量输出单元中的吹扫气体的当前压力，在所述流量输出端中具备阻尼管，所述控制单元包括：存储单元，在所述存储单元中预先存储有温度、压力、阻尼管参数与输出流量的关系式以及所述流量下限值和所述流量上限值；计算单元，其根据所述关系式，由所述流量输出单元中吹扫气体的当前温度、通过所述压力传感单元测量出的所述吹扫气体的当前压力、以及所述阻尼管的参数计算出所述流量输出端的所述当前输出流量；以及比较单元，其将计算出的所述当前输出流量与所述流量下限值以及所述流量上限值进行比较。In the above trapping tube aging device, it is preferable to further include a pressure sensing unit, which is arranged upstream of the flow output unit and communicated with the flow input end, and is used to measure the blowing pressure in the flow output unit. The current pressure of the scavenging gas, a damping tube is provided in the flow output end, and the control unit includes: a storage unit, in which the relationship between temperature, pressure, damping tube parameters and output flow, and the The flow rate lower limit value and the flow rate upper limit value; the calculation unit, according to the relational expression, the current temperature of the purge gas in the flow output unit and the purge gas measured by the pressure sensing unit The current pressure of the scavenging gas and the parameters of the damping tube calculate the current output flow of the flow output port; and a comparison unit, which compares the calculated current output flow with the flow lower limit value and the Flow upper limit value for comparison.
在上述捕集管老化装置中，优选的是，所述吹扫气体的当前温度通过从所述温控单元实时地读取而获得。In the above trapping tube aging device, preferably, the current temperature of the purge gas is obtained by reading from the temperature control unit in real time.
在上述捕集管老化装置中，优选的是，所述阻尼管的参数为阻尼管的孔径和/或长度。In the aforementioned trapping tube aging device, preferably, the parameter of the damping tube is the diameter and/or length of the damping tube.
在上述捕集管老化装置中，优选的是，所述控制单元在所述流量输出端的当前输出流量低于流量下限值的情况下，还使所述温控单元停止加热。In the above collection tube aging device, preferably, the control unit further stops the heating of the temperature control unit when the current output flow of the flow output end is lower than the lower flow limit.
在上述捕集管老化装置中，优选的是，所述警报单元以亮灯、发出蜂鸣或显示文字中的任一种或多种的方式输出警报。In the above collection tube aging device, preferably, the alarm unit outputs an alarm by any one or more of lighting, beeping, or text display.
本发明还提供一种捕集管老化用流量控制方法，其通过对捕集管通入吹扫气体并加热来将所述捕集管老化，所述捕集管老化用流量控制方法的特征在于，在输出到所述捕集管的吹扫气体的当前输出流量低于流量下限值或高于流量上限值的情况下，输出警报。The present invention also provides a flow control method for trapping tube aging, which ages the trapping tube by feeding purge gas into the trapping tube and heating it, and the flow control method for trapping tube aging is characterized in that , when the current output flow rate of the purge gas output to the trapping pipe is lower than the lower flow limit or higher than the upper flow limit, an alarm is output.
在上述捕集管老化用流量控制方法中，优选的是，所述当前输出流量根据所述捕集管中吹扫气体的当前温度、所述吹扫气体的当前压力、以及用于对所述吹扫气体产生流通阻力的阻尼管的参数计算出。In the above flow control method for trapping tube aging, preferably, the current output flow is based on the current temperature of the purge gas in the trap tube, the current pressure of the purge gas, and the The parameters of the damping tube for the flow resistance created by the purge gas are calculated.
在上述捕集管老化用流量控制方法中，优选的是，在所述当前输出流量低于所述流量下限值的情况下，还停止所述捕集管的加热。In the above flow control method for collecting tube aging, preferably, when the current output flow rate is lower than the flow rate lower limit, heating of the collecting tube is also stopped.
在上述捕集管老化用流量控制方法中，优选的是，以亮灯、发出蜂鸣或显示文字中的任一种或多种的方式输出警报。In the above-mentioned flow control method for trap tube aging, it is preferable to output an alarm by any one or more of lighting, beeping, or text display.
发明效果Invention effect
根据本发明的捕集管老化装置及捕集管老化用流量控制方法，能够避免在吹扫气体的流量过低或过高的情况下进行老化，保证了仪器的老化能力，也延长了捕集管的使用次数，另外能够降低成本，防止捕集管的损坏。According to the trapping tube aging device and the flow control method for trapping tube aging of the present invention, aging can be avoided when the flow rate of the purge gas is too low or too high, which ensures the aging capability of the instrument and prolongs the time of trapping. The number of times the tube is used can also reduce costs and prevent damage to the trapping tube.
附图说明Description of drawings
图1是现有技术中的捕集管老化装置100的结构示意图。Fig. 1 is a schematic structural diagram of a collection tube aging device 100 in the prior art.
图2是本发明的实施方式涉及的捕集管老化装置200的结构示意图。FIG. 2 is a schematic structural view of a collection tube aging device 200 according to an embodiment of the present invention.
图3是本发明的实施方式涉及的捕集管老化用流量控制方法的流程图。FIG. 3 is a flowchart of a flow rate control method for trap tube aging according to an embodiment of the present invention.
具体实施方式Detailed ways
图2是本实施方式涉及的捕集管老化装置200的结构示意图。该捕集管老化装置200包括流量输出单元210和温控单元220。流量输出单元210具有一个供吹扫气体输入的流量输入端211和多个(图中例示为7个)供吹扫气体输出的流量输出端212，各流量输出端212的输出流量相互一致。进行老化的多个捕集管(未图示)分别设置在各流量输出端212上并与流量输出端212连通，以使得从上述流量输出端212输出的吹扫气体全部通过该捕集管进行吹扫。在老化试验中，流量输出单元210被置于柱温箱内，通过温控单元220进行加热，该柱温箱的温度(也即流量输出单元210和捕集管的温度)被精确地控制为设定的值。FIG. 2 is a schematic structural diagram of a collection tube aging device 200 according to this embodiment. The trapping tube aging device 200 includes a flow output unit 210 and a temperature control unit 220 . The flow output unit 210 has a flow input port 211 for purge gas input and multiple (7 in the figure) flow output ports 212 for purge gas output, and the output flow rates of each flow output port 212 are consistent with each other. A plurality of trapping tubes (not shown) for aging are respectively arranged on each flow output port 212 and communicated with the flow output port 212, so that all the purge gas output from the above-mentioned flow output port 212 passes through the trapping tube. purge. In the aging test, the flow output unit 210 is placed in the column oven and heated by the temperature control unit 220, and the temperature of the column oven (that is, the temperature of the flow output unit 210 and the trapping tube) is precisely controlled as set value.
该捕集管老化装置200还包括用于输出警报的警报单元250和控制单元240，控制单元240对温控单元220和警报单元250进行控制。The trapping tube aging device 200 also includes an alarm unit 250 and a control unit 240 for outputting an alarm, and the control unit 240 controls the temperature control unit 220 and the alarm unit 250 .
在本发明中，为避免吹扫气体的流量过低或过高带来的不良后果，将控制单元240构成为：在流量输出单元210的每个流量输出端212的当前输出流量低于预先设定的流量下限值或高于预先设定的流量上限值的情况下，使警报单元250输出警报。另外，在流量低于流量下限值的情况下，控制单元240还可以同时使温控单元220停止加热。In the present invention, in order to avoid adverse consequences caused by too low or too high flow of purge gas, the control unit 240 is configured as follows: the current output flow of each flow output port 212 of the flow output unit 210 is lower than the preset When the flow rate is lower than a predetermined lower limit value or higher than a preset upper limit value of flow rate, the alarm unit 250 is made to output an alarm. In addition, when the flow rate is lower than the lower limit value of the flow rate, the control unit 240 may simultaneously stop the temperature control unit 220 from heating.
使用者收到警报后可以采取各种措施，例如在流量低于流量下限值甚至吹扫气体已用完的情况下，更换供给吹扫气体的气体源；在流量高于流量上限值的情况下，降低吹扫气体的流量大小等。输出警报的形式可以是亮灯(例如红灯)、发出蜂鸣或显示文字中的任一种或多种，也可以是其他的形式。After receiving the alarm, the user can take various measures, such as changing the gas source for supplying the purge gas when the flow rate is lower than the lower flow limit or even the purge gas is used up; In some cases, reduce the flow rate of the purge gas, etc. The form of outputting the alarm may be any one or more of lighting (such as a red light), beeping or displaying text, or other forms.
以下说明流量输出单元210的流量输出端212的当前输出流量的获取方法。The method for obtaining the current output flow of the flow output port 212 of the flow output unit 210 will be described below.
为了获得当前输出流量，在本实施方式中，根据压力等物理量进行计算。In order to obtain the current output flow rate, in this embodiment, calculation is performed based on physical quantities such as pressure.
具体来说，在吹扫气体的流路上、流量输出单元210的上游设置压力传感单元230，其与流量输出单元210的流量输入端211连通，用于测量流量输出单元210中的吹扫气体的当前压力。另外，在流量输出端212中具备不锈钢材质的阻尼管，其用于对吹扫气体产生流通阻力。根据阻尼管的孔径和长度的取值的不同，可以对吹扫气体提供不同的流通阻力。本实施方式中为使各个流量输出端212的输出流量相互一致，优选使各个阻尼管的参数也相互一致。Specifically, on the flow path of the purge gas, a pressure sensing unit 230 is arranged upstream of the flow output unit 210, which communicates with the flow input end 211 of the flow output unit 210, and is used to measure the purge gas in the flow output unit 210. current pressure. In addition, a damper tube made of stainless steel is provided in the flow output port 212 to generate flow resistance for the purge gas. Depending on the value of the aperture and length of the damping tube, different flow resistances can be provided for the purge gas. In this embodiment, in order to make the output flows of the flow output ends 212 consistent with each other, it is preferable to make the parameters of the damping tubes also consistent with each other.
从流量输出端212流出的吹扫气体的流量值取决于流量输出单元210中吹扫气体的当前温度、当前压力、以及阻尼管的参数(孔径和/或长度)。在控制单元240中，包含存储单元241、计算单元242和比较单元243。其中，在存储单元241中预先存储有上述温度、压力、阻尼管参数与输出流量的关系式，该关系式可以由产品制造商提供，也可以通过实验预先测量得出。计算单元242根据上述关系式，由流量输出单元210中吹扫气体的当前温度(即柱温箱温度)、压力传感单元230测出的当前压力、以及已知的阻尼管的参数计算出流量输出单元210的流量输出端212的当前输出流量。The flow rate of the purge gas flowing out of the flow output port 212 depends on the current temperature and pressure of the purge gas in the flow output unit 210 , and the parameters (aperture diameter and/or length) of the damping tube. In the control unit 240 , a storage unit 241 , a calculation unit 242 and a comparison unit 243 are included. Wherein, the storage unit 241 pre-stores the above-mentioned relational expression of temperature, pressure, damping tube parameters and output flow, and the relational expression may be provided by the product manufacturer, or obtained through pre-measurement through experiments. The calculation unit 242 calculates the flow rate from the current temperature of the purge gas in the flow output unit 210 (i.e., the temperature of the column thermostat), the current pressure measured by the pressure sensing unit 230, and the known parameters of the damping tube according to the above relational expression The current output flow of the flow output port 212 of the output unit 210 .
存储单元241中还存储有预先设定的流量下限值和流量上限值，比较单元243将由计算单元242计算出的上述当前输出流量与流量下限值以及流量上限值进行比较。由此，在流量输出端212的当前输出流量低于预先设定的流量下限值或高于预先设定的流量上限值的情况下，警报单元250输出警报。The storage unit 241 also stores a preset flow lower limit and a flow upper limit, and the comparison unit 243 compares the current output flow calculated by the calculation unit 242 with the flow lower limit and the flow upper limit. Thus, when the current output flow of the flow output terminal 212 is lower than the preset flow lower limit or higher than the preset flow upper limit, the alarm unit 250 outputs an alarm.
在上述实施方式中，为了获得流量输出端212的当前输出流量，根据温度、压力、阻尼管参数进行计算，但不限于此，例如也可以在流路中设置质量流量计等流量测量单元，根据实测的流量值来判定是否输出警报。在该情况下，可以省略上述压力传感单元230和计算单元242，阻尼管也可以不用设置。In the above-mentioned embodiment, in order to obtain the current output flow of the flow output port 212, the calculation is performed according to the temperature, pressure, and damping pipe parameters, but it is not limited thereto. The measured flow value is used to determine whether to output an alarm. In this case, the above-mentioned pressure sensing unit 230 and calculation unit 242 can be omitted, and the damping tube can also be omitted.
下面说明本实施方式涉及的捕集管老化用流量控制方法。Next, a flow rate control method for trap tube aging according to this embodiment will be described.
图3是该捕集管老化用流量控制方法的流程图。Fig. 3 is a flow chart of the flow control method for trapping tube aging.
在该捕集管老化用流量控制方法中，首先，在步骤S301中，判定输出到捕集管的吹扫气体的当前输出流量是否低于预先设定的流量下限值。In the flow control method for trapping tube aging, first, in step S301 , it is determined whether the current output flow rate of the purge gas output to the trapping tube is lower than a preset flow rate lower limit.
在判定为“是”的情况下，进入步骤S302，停止对捕集管的加热，并输出警报，流程结束。If the determination is "Yes", go to step S302, stop heating the collecting tube, output an alarm, and end the flow.
在判定为“否”的情况下，进入步骤S303，判定输出到捕集管的吹扫气体的当前输出流量是否高于预先设定的流量上限值。If the determination is "No", proceed to step S303, and determine whether the current output flow rate of the purge gas output to the collecting pipe is higher than the preset flow upper limit.
在判定为“是”的情况下，进入步骤S304，输出警报，流程结束。When the determination is "Yes", go to step S304, output an alarm, and the flow ends.
在判定为“否”的情况下，则返回S301，循环执行判定过程。If the determination is "No", return to S301, and execute the determination process in a loop.
与前述一样，输出到捕集管的吹扫气体的当前输出流量可以根据捕集管中吹扫气体的当前温度、吹扫气体的当前压力、以及用于对吹扫气体产生阻力的阻尼管的参数计算出，也可以通过在流路中设置质量流量计等流量测量单元进行测量获得。输出警报的形式可以是亮灯(例如红灯)、发出蜂鸣或显示文字中的任一种或多种，也可以是其他的形式。As before, the current output flow rate of the purge gas output to the trap tube can be determined according to the current temperature of the purge gas in the trap tube, the current pressure of the purge gas, and the damping tube used to create resistance to the purge gas. The parameters are calculated, and can also be obtained by setting a flow measurement unit such as a mass flow meter in the flow path for measurement. The form of outputting the alarm may be any one or more of lighting (such as a red light), beeping or displaying text, or other forms.
[其他实施方式][Other implementations]
本发明不限于上述实施方式，可以在不脱离本发明的主旨的范围内进行各种变更。The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention.
例如，捕集管老化装置200还可以包含显示单元，在显示单元上显示计算或测量出的当前输出流量，也可以同时显示流量输出单元210中的吹扫气体的当前压力和当前温度。For example, the trapping tube aging device 200 may further include a display unit, which displays the calculated or measured current output flow, or simultaneously displays the current pressure and current temperature of the purge gas in the flow output unit 210 .
此外，流量输出单元210中吹扫气体的当前温度既可以由使用者手动输入，也可以通过从温控单元220自动实时地读取数据而获得。In addition, the current temperature of the purge gas in the flow output unit 210 can be manually input by the user, or can be obtained by automatically reading data from the temperature control unit 220 in real time.
此外，为了对吹扫气体进行过滤，可以在流量输出单元210的上游设置过滤装置。In addition, in order to filter the purge gas, a filter device may be provided upstream of the flow output unit 210 .
此外，在图3的步骤S302中，当流量过低时停止对捕集管的加热并输出警报，但不限于此，也可以仅输出警报。In addition, in step S302 of FIG. 3 , when the flow rate is too low, the heating of the collecting pipe is stopped and an alarm is output, but the present invention is not limited to this, and only an alarm may be output.
此外，在上述实施方式中，阻尼管采用不锈钢材质，但不限于此，只要是性质稳定、耐高温、且不易被吹扫气体腐蚀的材质均可。In addition, in the above embodiments, the damping tube is made of stainless steel, but it is not limited thereto, as long as it is stable, high temperature resistant, and not easily corroded by the purge gas.
此外，作为吹扫气体，可以使用氮气，当然也可以使用其他性质较为稳定的气体。In addition, as the purge gas, nitrogen gas can be used, and of course other gases with relatively stable properties can also be used.
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