CN217821356U - An automatic variable-diameter throttle orifice adjustment system adapting to different pressure environments - Google Patents
An automatic variable-diameter throttle orifice adjustment system adapting to different pressure environments Download PDFInfo
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Abstract
Description
技术领域technical field
本实用新型属于流量传感技术领域,具体涉及一种适应不同压力环境的自动变径节流孔板调节系统。The utility model belongs to the technical field of flow sensing, in particular to an automatic variable-diameter throttling orifice adjustment system adaptable to different pressure environments.
背景技术Background technique
在工程项目中,经常通过不同的方式来降低管路中的水流压力,而节流孔板由于其易安装拆卸,且结构简单,从而在需要降压的工程中得到广泛应用。关于节流孔板使用,尤其是多级节流孔板,工程中是需要根据管道内的水压实际情况来确定孔板的级数以及每一级孔板的内径,但是在目前的环境下,大部分节流孔板的变径需要在管路中进行拆卸与变换,小部分节流孔板已经实现可以通过人力在外部手工调动进行管道内部节流孔板的变径,如公开号为CN113685643A,名称为一种变径节流孔板,提出了可以实现人为变径的节流孔板装置,但是目前还没有针对各种工程中的管道内水压进行自动化调节方案。In engineering projects, different methods are often used to reduce the water flow pressure in the pipeline, and the throttle orifice is widely used in projects requiring pressure reduction because of its easy installation and disassembly and simple structure. Regarding the use of throttling orifice plates, especially multi-stage throttling orifice plates, it is necessary to determine the number of stages of orifice plates and the inner diameter of each stage of orifice plates according to the actual water pressure in the pipeline, but in the current environment , most of the diameter reduction of the throttle orifice needs to be disassembled and replaced in the pipeline, and a small part of the throttle orifice has been realized to change the diameter of the internal throttling orifice of the pipeline through manpower and manual mobilization. For example, the publication number is CN113685643A, titled a variable-diameter throttling orifice, proposes a throttling orifice device that can realize artificial diameter reduction, but there is no automatic adjustment scheme for the water pressure in the pipeline in various projects.
由于阻塞压差的存在,为了防止空化与气蚀,在工程生产中对于孔板的使用就有一定的要求。在实际生产生活中,管道内的水压并不是恒定不变的,是处于不断变化的过程中的,当环境中水压进行变化时,我们就需要根据改变后的水压进行不同孔径孔板的更换,实现有效降压,而一些可以通过外部人力来调节孔径的节流孔板,也需要人为根据水压进行调整,频繁性的更换与调整加大了工作量,会造成人力与物力资源的浪费,且若调整不准确,容易出现空化与气蚀,对管路造成损害。Due to the existence of blocking pressure difference, in order to prevent cavitation and cavitation, there are certain requirements for the use of orifice plates in engineering production. In actual production and life, the water pressure in the pipeline is not constant, but is in a process of constant change. When the water pressure in the environment changes, we need to carry out orifice plates with different apertures according to the changed water pressure. Replacement to achieve effective pressure reduction, and some throttling orifices that can be adjusted by external manpower also need to be adjusted manually according to the water pressure. Frequent replacement and adjustment increase the workload, which will cause human and material resources. The waste, and if the adjustment is not accurate, it is easy to cause cavitation and cavitation, which will cause damage to the pipeline.
实用新型内容Utility model content
本实用新型的目的在于提供一种适应不同压力环境的自动变径节流孔板调节系统,它能够根据所处管道系统的水压以及我们所想要取得的减压效果,自动分多级进行节流降压,不仅自动划分多级,而且对于每一级都有孔径的预设置以及修正,在防止空化与气蚀的同时做到自动化地根据水压调节孔径。The purpose of this utility model is to provide an automatic variable-diameter throttle orifice adjustment system adapted to different pressure environments, which can be automatically divided into multiple stages according to the water pressure of the pipeline system and the decompression effect we want to obtain. Throttling and pressure reduction not only automatically divide into multiple stages, but also have aperture preset and correction for each stage, so as to prevent cavitation and cavitation while automatically adjusting aperture according to water pressure.
为了实现上述目的,本实用新型采用如下技术方案:In order to achieve the above object, the utility model adopts the following technical solutions:
一种适应不同压力环境的自动变径节流孔板调节系统,包括主控制器、主压力检测机构及辅助控制机构;所述主控制器的输入端与主压力检测机构的输出端电连接,主控制器与并联设置的多级辅助控制机构双向电连接,且多级辅助控制机构的个数根据实际的工况而定。An automatic variable-diameter throttle orifice adjustment system adapted to different pressure environments, including a main controller, a main pressure detection mechanism and an auxiliary control mechanism; the input end of the main controller is electrically connected to the output end of the main pressure detection mechanism, The main controller is bidirectionally electrically connected to the multi-level auxiliary control mechanisms arranged in parallel, and the number of multi-level auxiliary control mechanisms is determined according to actual working conditions.
所述主压力检测机构由主水压传感器和主压力变送器组成,主水压传感器的输出端与主压力变送器的输入端连接,且主压力变送器的输出端与主控制器的输入端连接。所述主压力检测机构用于测得管道内水流的进入水压,其中主水压传感器获取水压信号并传送至主压力变送器中,主压力变送器则将压力信号转化为标准的电信号传送至主控制器,所述主控制器用于接收压力检测机构获得的水压信号。The main pressure detection mechanism is composed of a main water pressure sensor and a main pressure transmitter, the output end of the main water pressure sensor is connected with the input end of the main pressure transmitter, and the output end of the main pressure transmitter is connected with the main controller input connection. The main pressure detection mechanism is used to measure the incoming water pressure of the water flow in the pipeline, wherein the main water pressure sensor obtains the water pressure signal and transmits it to the main pressure transmitter, and the main pressure transmitter converts the pressure signal into a standard The electric signal is transmitted to the main controller, and the main controller is used for receiving the water pressure signal obtained by the pressure detection mechanism.
所述辅助控制机构包括辅助控制器,所述辅助控制器与主控制器双向电连接,辅助控制器的输入端依次与辅助压力变送器和辅助水压传感器电连接,且辅助压力变送器和辅助水压传感器组成压力检测机构,辅助控制器的输出端变径调节机构连接。The auxiliary control mechanism includes an auxiliary controller, the auxiliary controller is electrically connected to the main controller in two directions, the input end of the auxiliary controller is electrically connected to the auxiliary pressure transmitter and the auxiliary water pressure sensor in turn, and the auxiliary pressure transmitter It forms a pressure detection mechanism with the auxiliary water pressure sensor, and the output end of the auxiliary controller is connected with the variable diameter adjustment mechanism.
所述变径调节机构包括伺服驱动器,所述伺服驱动器和伺服电机电连接,伺服电机的输出轴与变径节流孔板旋转转盘连接。The variable diameter adjustment mechanism includes a servo driver, the servo driver is electrically connected to the servo motor, and the output shaft of the servo motor is connected to the rotating turntable of the variable diameter orifice plate.
所述主控制器与辅助控制器型号一致;所述主水压传感器和辅助水压传感器型号一致;所述主压力变送器和辅助压力变送器型号一致。The model of the main controller is the same as that of the auxiliary controller; the model of the main water pressure sensor is the same as that of the auxiliary water pressure sensor; the model of the main pressure transmitter is the same as that of the auxiliary pressure transmitter.
外部人为通过主控制器输入目标压力,再经由主控制器根据数据系统计算出所需变径节流孔板级数以及各级变径节流孔板结构参数,并向辅助控制器传递压力信号与参数信息,辅助控制器接收辅助压力检测机构的电信号并对辅助压力检测机构检测的电信号和主控制器所要求的压力信号进行比较,判断其是否为主控制器所要求的压力信号,而后依据比较的结果选择正机制或负机制传输,辅助控制器将指令传输给伺服驱动器,伺服驱动器将辅助控制器传递的电信号转化为可供伺服电机接受的信号,控制伺服电机工作,带动变径节流孔板收缩或展开,以调节变径节流孔板孔径的大小,同时将比较的结果反馈给主控制器,此时主控制器根据比较结果重新计算本级变径节流孔板之后的变径节流孔板的孔径。Externally input the target pressure through the main controller, and then calculate the required number of variable-diameter orifice plate stages and structural parameters of variable-diameter orifice plates according to the data system through the main controller, and transmit the pressure signal to the auxiliary controller With the parameter information, the auxiliary controller receives the electrical signal from the auxiliary pressure detection mechanism and compares the electrical signal detected by the auxiliary pressure detection mechanism with the pressure signal required by the main controller to determine whether it is the pressure signal required by the main controller. Then select positive mechanism or negative mechanism transmission according to the comparison result, the auxiliary controller transmits the instruction to the servo driver, and the servo driver converts the electrical signal transmitted by the auxiliary controller into a signal that can be accepted by the servo motor, controls the work of the servo motor, and drives the transformer. The diameter of the orifice plate shrinks or expands to adjust the aperture size of the variable diameter orifice plate, and at the same time, the comparison result is fed back to the main controller. At this time, the main controller recalculates the variable diameter orifice plate according to the comparison result. The diameter of the subsequent variable diameter orifice plate.
与现有的技术相比,本实用新型的优点是:Compared with the prior art, the utility model has the advantages of:
通过主控制器和辅助控制器的传感控制,使得各级水流控制更加精确,即避免了管道的结构损失又实现降压以及节流的目的。由此,实现了根据水压对节流孔径大小的自动控制,代替了原本的针对不同水压的人工手动操作,提高了操作系统的智能化程度,同时水压传感器可以获知实时的压力信号,有利于提高系统的检测精度,优化系统的性能。并且,设立多级控制器可以不会因为某一级发生错误而造成整个系统的崩溃,即当某一级出现错误时,可以单独断开该级连接,使用后面的变径节流孔板。Through the sensor control of the main controller and the auxiliary controller, the water flow control at all levels is more precise, which avoids the structural loss of the pipeline and realizes the purpose of reducing pressure and throttling. Thus, the automatic control of the orifice size according to the water pressure is realized, which replaces the original manual operation for different water pressures, and improves the intelligence of the operating system. At the same time, the water pressure sensor can obtain real-time pressure signals, It is beneficial to improve the detection accuracy of the system and optimize the performance of the system. Moreover, the establishment of a multi-stage controller can prevent the entire system from collapsing due to an error in a certain stage, that is, when an error occurs in a certain stage, the connection of this stage can be disconnected separately, and the variable-diameter orifice plate behind it can be used.
附图说明Description of drawings
图1为本实用新型适应不同压力环境的自动变径节流孔板调节系统示意图;Fig. 1 is the schematic diagram of the automatic variable-diameter throttling orifice adjustment system of the utility model adapting to different pressure environments;
1-主控制器、2-主压力检测机构、3-主水压传感器、4-主压力变送器、5-辅助控制器、6-伺服驱动器、7-伺服电机、8-变径节流孔板,9-辅助水压传感器,10-辅助压力变送器。1-main controller, 2-main pressure detection mechanism, 3-main water pressure sensor, 4-main pressure transmitter, 5-auxiliary controller, 6-servo driver, 7-servo motor, 8-variable diameter throttle Orifice plate, 9-auxiliary water pressure sensor, 10-auxiliary pressure transmitter.
具体实施方式Detailed ways
下面结合附图和实施例对本实用新型作进一步的详细说明。Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
如图1所示,一种适应不同压力环境的自动变径节流孔板调节系统,包括主控制器1、主压力检测机构2及辅助控制机构;所述主控制器1的输入端与主压力检测机构2的输出端电连接,主控制器1与并联设置的多级辅助控制机构双向电连接。整体调节系统的级数视实际生产情况而定。As shown in Figure 1, an automatic variable-diameter throttle orifice adjustment system adapting to different pressure environments includes a main controller 1, a main
所述主压力检测机构2由主水压传感器3和主压力变送器4组成,主水压传感器3的输出端与主压力变送器4的输入端连接,且主压力变送器4的输出端与主控制器1的输入端连接。所述主压力检测机构2用于测得管道内水流的进入水压,其中主水压传感器3获取水压信号并传送至主压力变送器4中,主压力变送器4则将压力信号转化为标准的电信号传送至主控制器1,所述主控制器1用于接收压力检测机构获得的水压信号。The main
所述辅助控制机构包括辅助控制器5,所述辅助控制器5与主控制器1双向电连接,辅助控制器5的输入端依次与辅助压力变送器10和辅助水压传感器9电连接,且辅助压力变送器10和辅助水压传感器9组成压力检测机构,辅助控制器5的输出端依次与伺服驱动器6和伺服电机7电连接,伺服电机7的输出轴与变径节流孔板8旋转转盘连接。The auxiliary control mechanism includes an auxiliary controller 5, the auxiliary controller 5 is bidirectionally electrically connected to the main controller 1, and the input end of the auxiliary controller 5 is electrically connected to the auxiliary pressure transmitter 10 and the auxiliary water pressure sensor 9 in turn, And the auxiliary pressure transmitter 10 and the auxiliary water pressure sensor 9 form a pressure detection mechanism, the output end of the auxiliary controller 5 is electrically connected with the servo driver 6 and the servo motor 7 in turn, and the output shaft of the servo motor 7 is connected with the variable diameter orifice plate 8 rotating turntable connections.
主控制器1和辅助控制器5型号为FX3U-32MT-ES-A;主水压传感器3和辅助水压传感器9型号为FST800-1500;主压力变送器4和辅助压力变送器103051TG1A2B21AB4K5M5。The model of main controller 1 and auxiliary controller 5 is FX3U-32MT-ES-A; the model of main water pressure sensor 3 and auxiliary water pressure sensor 9 is FST800-1500; the main pressure transmitter 4 and auxiliary pressure transmitter 103051TG1A2B21AB4K5M5.
外部人为通过主控制器1输入目标压力再经由主控制器1根据数据系统计算出所需变径节流孔板8级数以及各级变径节流孔板8结构参数,并向辅助控制器5传递压力信号与参数信息,辅助控制器5接收辅助压力检测机构的电信号并对辅助压力检测机构检测的电信号和主控制器1所要求的压力信号进行比较,判断其是否为主控制器1所要求的压力信号,而后依据比较的结果选择正机制或负机制传输,辅助控制器5将指令传输给伺服驱动器6,伺服驱动器6将辅助控制器5传递的电信号转化为可供伺服电机7接受的信号,控制伺服电机7工作,带动变径节流孔板8收缩或展开,以调节变径节流孔板8孔径的大小,同时将比较的结果反馈给主控制器1,此时主控制器1根据比较结果重新计算本级孔板之后的孔板的孔径。Externally input the target pressure through the main controller 1, and then calculate the required variable-diameter orifice plate 8 stages and the structural parameters of the variable-diameter orifice plate 8 through the main controller 1 according to the data system, and send them to the auxiliary controller 5 Transmit the pressure signal and parameter information, the auxiliary controller 5 receives the electrical signal from the auxiliary pressure detection mechanism and compares the electrical signal detected by the auxiliary pressure detection mechanism with the pressure signal required by the main controller 1 to determine whether it is the main controller 1, the pressure signal required by 1, and then select positive mechanism or negative mechanism transmission according to the comparison result, the auxiliary controller 5 transmits the instruction to the servo driver 6, and the servo driver 6 converts the electrical signal transmitted by the auxiliary controller 5 into a servo motor The signal received by 7 controls the operation of the servo motor 7, and drives the variable diameter orifice plate 8 to shrink or expand to adjust the size of the aperture of the variable diameter orifice plate 8. At the same time, the comparison result is fed back to the main controller 1. At this time The main controller 1 recalculates the aperture diameter of the orifice plate following the current stage of the orifice plate according to the comparison result.
可以根据不同的管道内水压自动地实现变径,且不会因为阻塞压差的存在出现空化或者气蚀,可以完全地摆脱人力。多个水压传感器可以实时地获取管道内水流的实际压力,并将其输出,以便可以更加快速地对不同的环境做出相应的调整适应。设立多级辅助控制器5,内含有负机制,可以对结构的实际降压效果进行整合并做出调整,同时,多级辅助控制器5相比于单级控制器控制多级变径节流孔板8,其不会因为某一级发生错误而造成整个系统的崩溃,即当某一级出现错误时,可以单独断开该级连接,使用后面的变径节流孔板8。The diameter can be changed automatically according to the water pressure in different pipelines, and there will be no cavitation or cavitation due to the existence of blocking pressure difference, and it can completely get rid of manpower. Multiple water pressure sensors can obtain the actual pressure of the water flow in the pipeline in real time and output it, so that corresponding adjustments can be made to different environments more quickly. A multi-level auxiliary controller 5 is set up, which contains a negative mechanism, which can integrate and adjust the actual pressure-reducing effect of the structure. The orifice 8 will not cause the collapse of the entire system due to an error in a certain stage, that is, when an error occurs in a certain stage, the connection of this stage can be disconnected separately, and the variable-diameter throttle orifice 8 at the back can be used.
主水压传感器3和辅助水压传感器9通过支座与管道内壁相连,与管道内壁垂直且位于正上方,实时检测各级变径节流孔板8前的实际水压并传送至相应的压力变送器中。所述主控制器1、辅助控制器5通过支座固定于管道内壁上。The main water pressure sensor 3 and the auxiliary water pressure sensor 9 are connected to the inner wall of the pipeline through the support, perpendicular to the inner wall of the pipeline and located directly above, real-time detection of the actual water pressure in front of the variable diameter orifice plate 8 at each level and transmitted to the corresponding pressure in the transmitter. The main controller 1 and the auxiliary controller 5 are fixed on the inner wall of the pipeline through a support.
一种适应不同压力环境的自动变径节流孔板调节系统的工作过程为:The working process of an automatic variable diameter orifice adjustment system adapting to different pressure environments is as follows:
在使用前,首先初始化整个系统,各级变径节流孔板8均张开至最大孔径,本系统分为正负两种机制;Before use, first initialize the entire system, and the variable-diameter orifice plates 8 at all levels are opened to the maximum aperture. The system is divided into positive and negative mechanisms;
正机制:当流体流至主水压传感器3时,主水压传感器3将压力信号转变成电信号,传至主压力变送器4中,经标准化传送至主控制器1中,对外部显示出进口水压。根据实际生产生活要求,人为输入想要获得的压力标准,主控制器1根据数据系统中所设置公式函数进行计算,确定合理的各级参数以及变径节流孔板8的数量,作为电信号输出至各级辅助控制器5中,各级辅助控制器5得到后将此信号传送至伺服驱动器6中,伺服驱动器6再将此信号转化成可供伺服电机7识别的信号,控制伺服电机7工作,带动需要调节的变径节流孔板8收缩或展开,以调节变径节流孔板8孔径的大小;而对于不需要的变径节流孔板8保持初始化状态不变;Positive mechanism: when the fluid flows to the main water pressure sensor 3, the main water pressure sensor 3 converts the pressure signal into an electrical signal, transmits it to the main pressure transmitter 4, and transmits it to the main controller 1 after standardization, and displays it externally Import and export water pressure. According to the actual production and living requirements, the desired pressure standard is manually input, and the main controller 1 calculates according to the formula function set in the data system to determine reasonable parameters at all levels and the number of variable diameter orifice plates 8 as electrical signals Output to the auxiliary controllers 5 at all levels, and the auxiliary controllers 5 at all levels will transmit this signal to the servo driver 6 after obtaining it, and the servo driver 6 will convert the signal into a signal that can be recognized by the servo motor 7 to control the servo motor 7 Work, drive the variable diameter orifice plate 8 that needs to be adjusted to shrink or expand, to adjust the size of the aperture of the variable diameter orifice plate 8; and keep the initialization state unchanged for the unnecessary variable diameter orifice plate 8;
负机制:所述负机制是建立在正机制之上的;Negative Mechanism: The Negative Mechanism is based on the Positive Mechanism;
当设定出口压力已经超出n级变径节流孔板8所降压范围后,通过主控制器1的屏幕显示error提醒;When the set outlet pressure has exceeded the decompression range of the n-stage variable-diameter orifice plate 8, an error reminder will be displayed on the screen of the main controller 1;
当流体流至各级辅助压力检测机构2处时,各级辅助压力检测机构2测出实际流体的压力,并将其输送至对应的辅助控制器5中,在辅助控制器5中进行实际值与主控制器1传输过来的理论值进行比较,若实际值小于理论值,则正常运行正机制;若某一级的实际值大于理论值,则说明上一级降压不稳定,此时辅助控制器5根据实际值进行更改,在本级变径节流孔板8不发生空化与气蚀的情况下控制本级变径节流孔板8进行孔径调节,同时本级辅助控制器5将数据反馈给主控制器1,主控制器1根据反馈信息进行重新计算,进而将最新的指令按照正机制输送至各级辅助控制器5,继续进行正机制。When the fluid flows to the auxiliary
其中,各个控制器根据数据系统中所设置公式函数进行计算,确定合理的各级参数,具体为:Among them, each controller calculates according to the formula function set in the data system, and determines reasonable parameters at all levels, specifically:
数据系统内主要函数公式根据《火力发电厂汽水管道技术规定》DL/T 5054-2016与《管路的限流孔板》HG/T 20570.15-95进行设定,具体地,The main function formulas in the data system are set according to DL/T 5054-2016 "Technical Regulations for Steam and Water Pipelines in Thermal Power Plants" and "HG/T 20570.15-95 Flow Limiting Orifice Plates for Pipelines". Specifically,
空化阻塞压差:Δps=FL 2(p1-Ffpv)Cavitation blocking pressure difference: Δp s =F L 2 (p 1 -F f p v )
其中,Δps为阻塞压差,MPa;p1为孔板前压力,MPa;Ff为临界压力比系数;FL为压力恢复系数,取值0.9;pv为相应设计温度下的饱和蒸汽压力,MPa;pc为液体的热力学临界压力,取22.5MPa。Among them, Δp s is the blocking pressure difference, MPa; p 1 is the pressure in front of the orifice plate, MPa; F f is the critical pressure ratio coefficient; F L is the pressure recovery coefficient, the value is 0.9; p v is the saturated steam pressure at the corresponding design temperature , MPa; p c is the thermodynamic critical pressure of liquid, take 22.5MPa.
变径节流孔板8的级数: Number of stages of variable diameter orifice plate 8:
Δp=Δp1+Δp2+Δp3+…+Δpn Δp=Δp 1 +Δp 2 +Δp 3 +…+Δp n
Δp1=2Δp2=4Δp3=…=2n-1Δpn Δp 1 =2Δp 2 =4Δp 3 =...=2 n-1 Δp n
其中,Δp为总的压降;Δpn为第n级压降;Among them, Δp is the total pressure drop; Δp n is the pressure drop of the nth stage;
变径节流孔板8的孔径: The aperture of variable-diameter orifice plate 8:
其中,Dk为节流孔板的孔径,mm;G为通过孔板的流量,t/h;ρ为液体的密度,kg/m3;Δpi为变径节流孔板前后压差,MPa,其中i为第n级变径节流孔板;Among them, D k is the aperture of the throttle orifice, mm; G is the flow through the orifice, t/h; ρ is the density of the liquid, kg/m 3 ; Δpi is the pressure difference before and after the variable diameter throttle orifice, MPa , where i is the nth stage variable diameter orifice plate;
变径节流孔板8的厚度: The thickness of variable diameter orifice plate 8:
其中,Sc为孔板的厚度,mm;k,为孔板结构系数,分别取为0.65和0.85;Di为管道内径,mm;[σ]t为材料在设计温度下的许用应力;p为设计压力,MPa;Among them, S c is the thickness of the orifice plate, mm; k, is the orifice structure factor, which is taken as 0.65 and 0.85 respectively; D i is the inner diameter of the pipe, mm; [σ] t is the allowable stress of the material at the design temperature; p is the design pressure, MPa;
所述主控制器1通过数据系统将对应降压范围内的孔板级数及对应的孔径大小集成到主控制器1中,通过计算确定合理的参数,进而将控制信号准确传递到各级辅助控制器5中。The main controller 1 integrates the number of orifice plate series and the corresponding aperture size in the corresponding pressure reduction range into the main controller 1 through the data system, and determines reasonable parameters through calculation, and then accurately transmits the control signal to the auxiliary equipment at all levels. Controller 5.
本实用新型在具体实施时,相邻两个变径节流孔板8之间的距离L应确保流至下一级辅助水压传感器9的水流稳定,辅助水压传感器9可以精确测量。同时关于级数n,在此做出说明,为了防止在降压过程中发生空化现象,每一级所能降低的压力是有一定限度的,所以n的取值代表了本系统所能正常降压的理论范围。When the utility model is actually implemented, the distance L between two adjacent variable-diameter orifice plates 8 should ensure that the water flow to the next-stage auxiliary water pressure sensor 9 is stable, and the auxiliary water pressure sensor 9 can accurately measure. At the same time, regarding the number of stages n, here is an explanation. In order to prevent cavitation during the depressurization process, the pressure that can be reduced by each stage has a certain limit, so the value of n represents the normal performance of the system. Theoretical range of buck.
以上对本实用新型及其实施方式进行了描述,这种描述没有限制性,附图中所示的也只是本实用新型的实施方式之一,实际的结构并不局限于此。总而言之如果本领域的普通技术人员受其启示,在不脱离本实用新型创造宗旨的情况下,不经创造性的设计出与该技术方案相似的结构方式及实施例,均应属于本实用新型的保护范围。The utility model and its implementation have been described above. This description is not restrictive. What is shown in the drawings is only one implementation of the utility model, and the actual structure is not limited thereto. All in all, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the utility model, without creatively designing a structural method and embodiment similar to the technical solution, it shall be protected by the utility model scope.
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