CN103727051B - Multi-branch accurate flow control system with large sucking rate - Google Patents

Multi-branch accurate flow control system with large sucking rate Download PDF

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CN103727051B
CN103727051B CN201410021964.4A CN201410021964A CN103727051B CN 103727051 B CN103727051 B CN 103727051B CN 201410021964 A CN201410021964 A CN 201410021964A CN 103727051 B CN103727051 B CN 103727051B
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connected
vacuum
flow
system
plc
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CN201410021964.4A
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CN103727051A (en
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陈维茂
燕洪顺
马新华
孙向东
杨志兵
刘勋涛
荆延波
宋文玲
孟凡瑞
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淄博水环真空泵厂有限公司
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Abstract

大抽气量多支路流量精确控制系统,属于真空设备控制领域。 High pumping flow branches precise quantity control system, a control device belonging to the field of vacuum. 包括真空系统(2),其特征在于:包括多条与真空系统(2)相连的分支吸气管路(6),所有分支吸气管路(6)同时接入主吸气管路(15),主吸气管路(15)上依次并联连接有补气单元、压力检测调节单元以及抽真空单元,补气单元、压力检测调节单元以及抽真空单元由控制电路控制。 Comprising a vacuum system (2), characterized by: a plurality of branch intake conduit (6) connected to the vacuum system (2), all branch intake conduit (6) while access to the main suction pipe (15 ), successively in parallel with the main suction line (15) connected qi means, pressure detecting means and a vacuum regulating means, qi means, pressure detecting means and a regulating means controlled by the evacuation control circuit. 本发明流量精确控制系统可以对大型真空系统进行大流量多支路抽真空操作,能够保证流量精确控制。 Precise flow control system of the present invention can be a large flow of large vacuum system was evacuated multidrop operation, to ensure accurate flow control. 采用PLC对系统进行控制,同时分别设置PLC主、从站,可以更好地实现流量控制,智能化程度更高。 Using PLC to control the system, are provided at the same time the master PLC, slave, flow control can be better implemented, smarter.

Description

大抽气量多支路流量精确控制系统 High pumping flow branches precise quantity control system

技术领域 FIELD

[0001] 大抽气量多支路流量精确控制系统,属于真空设备控制领域。 [0001] Large amount of exhaust flow branches precise control system, a control device belonging to the field of vacuum. 具体涉及一种对大型真空系统进行抽真空的流量精确控制系统。 Particularly it relates to a system for evacuating large vacuum precise flow control system.

背景技术 Background technique

[0002] 在现有技术中,许多科学实验需要在真空的环境中进行,但现有类似的真空实验由于条件及试验规模的限制存在着抽气量小及分支路少精度不高,自动化程度低等问题。 [0002] Many scientific experiments required in the prior art in a vacuum environment, the conventional vacuum similar experimental conditions and limitations due to the presence of a pilot scale and a small amount of exhaust branch passage less accuracy is not high, low degree of automation And other issues.

发明内容 SUMMARY

[0003] 本发明要解决的技术问题是:克服现有技术的不足,提供一种针对大型真空系统进行抽真空操作,能够保证分支吸气管路内流量精确控制的大抽气量多支路流量精确控制系统。 [0003] The present invention is to solve the technical problem: to overcome the deficiencies of the prior art, there is provided a vacuuming operation for large vacuum system, to ensure a large amount of exhaust branch intake conduit flow precisely controlled flow multidrop precise control system.

[0004] 本发明解决其技术问题所采用的技术方案是:该大抽气量多支路流量精确控制系统,包括真空系统,其特征在于:包括多条与真空系统相连的分支吸气管路,所有分支吸气管路同时接入主吸气管路,主吸气管路上依次并联连接有补气单元、压力检测调节单元以及抽真空单元,补气单元、压力检测调节单元以及抽真空单元由控制电路控制。 [0004] aspect of the present invention to solve the technical problem is that: the large amount of exhaust flow branches precise control system, comprising a vacuum system, characterized by: a plurality of branch intake pipes connected to a vacuum system, All access to the main branch intake conduit while the intake pipe, the intake pipe main path is connected in parallel sequentially qi means, pressure detecting means and a vacuum regulating means, qi means, detecting a pressure regulating unit and by the evacuation means control circuit.

[0005] 所述的抽真空单元为一组或多组真空机组,真空机组中的真空泵吸气管路一端并联接入主吸气管路,真空泵吸气管路的另一端串联连接止回阀之后与水环真空泵的进气口相连,水环真空泵的排气口通过管路与汽水分离器相连,汽水分离器的回水管路中串联连接有回水泵,汽水分离器的排气口处连接有排气管路,排气管路的另一端连接有消音器,进水管路依次串联连接手动球阀和电动开关阀之后与水环真空泵的进水口相连,在进水管路上同时设置有供水泵,电动机通过减速机与水环真空泵相连。 [0005] The evacuation unit is one or more groups vacuum unit, the vacuum pump unit of the suction line at one end and coupled into the main suction line, and the other end connected in series to the vacuum pump suction line of a check valve after the water ring vacuum pump is connected to the intake port, an exhaust port water ring vacuum pump is connected via a line to the steam separator, a steam separator return line connected in series in the return pump, the exhaust port is connected to the steam separator an exhaust pipe, the other end of the exhaust pipe connected to the muffler, the inlet pipe is connected in series after the manual ball valve and electrical switch connected to the inlet water ring vacuum pump, while the water inlet pipeline provided with a supply pump, water ring vacuum pump motor is connected via a reduction machine.

[0006] 所述的真空机组可为三组。 According to [0006] vacuum unit may be three.

[0007] 所述的补气单元为一条或多条并联的补气管路,在每条补气管路上分别串联连接有补气调节阀,在每条补气管路的末端设置有过滤网。 Qi units [0007] according to one or more parallel lines qi, fill in the air line are each connected in series regulating valve qi, qi at the end of each conduit is provided with a filter.

[0008] 所述的压力检测调节单元为设置于补气单元和抽真空单元之间的第三真空表、第一压力变送器、主管路调节阀、第四真空表以及第二压力变送器。 [0008] The adjustment of the pressure detecting means is disposed in the third vacuum pumping unit and the qi table between the vacuum unit, a first pressure transmitter, the main line valve, a fourth vacuum gauge and a second pressure transmitter device.

[0009] 所述的第一压力变送器和第二压力变送器为绝压变送器。 [0009] said first and second pressure transmitter is a pressure transmitter absolute pressure transmitter.

[0010] 所述的分支吸气管路为多条,其上依次串联连接有流量计、第二真空表以及气动调节阀。 Branch intake pipes [0010] The plurality of, which in turn is connected in series with a flow meter, vacuum gauge, and a second pneumatic valve.

[0011] 所述的流量计为槽道流量计。 [0011] The channel flow meter is a flow meter.

[0012] 在所述的控制电路中,6KV电压接入高压开关柜Ul内,高压开关柜Ul输出端依次连接高压软启动柜U2~U4为其供电,高压开关柜Ul同时与PLC从站的DI模块及DO模块相连,高压开关柜Ul、高压软启动柜U2~U4、电动阀门执行器U5~U7、绝压变送器U8以及正压变送器U9通过总线Profibus-DP2与PLC从站的通讯模块相连,电机启动器U10~U13同时与PLC从站的DI模块及DO模块相连,气动阀门定位器U14、流量计U15以及绝压变送器U16同时通过总线Profibus-DPl与PLC主站的主CPU模块相连,PLC主站和从站之间通过光纤连接。 [0012] In the control circuit, access to the high voltage switchgear 6KV voltage Ul, Ul high voltage switchgear high-voltage output terminal is connected sequentially soft start cabinet U2 ~ U4 its power supply, while the high voltage switchboard Ul slave PLC DI and DO module connected to the module, Ul high voltage switchgear, voltage soft start counter U2 ~ U4, electric valve actuators U5 ~ U7, U8 absolute pressure transmitter and pressure transmitter Profibus-DP2 U9 via a bus slave and PLC connected to the communication module, motor starters U10 ~ U13 simultaneously connected to the PLC from the DI and DO module station modules, pneumatic positioner U14, U15 and absolute pressure transmitter flowmeter U16 simultaneously by Profibus-DPl and bus master PLC the module is connected to the main CPU, PLC master station and the slave station through the optical fiber.

[0013] 所述的PLC主站型号为S7-300,PLC从站型号为ET200M。 [0013] the master PLC model S7-300, PLC slave model ET200M.

[0014] 与现有技术相比,本发明的所具有的有益效果是: [0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1、本发明的流量精确控制系统可对大型真空系统进行多条分支吸气管路同时抽真空操作,每条分支吸气管路内的流量可达3m3/s,并能够保证流量精确控制。 [0015] 1, accurate flow control system of the present invention may be large vacuum system while the plurality of branch intake pipes vacuuming operation, the flow rate within each branch intake conduit up to 3m3 / s, and can guarantee traffic precise control.

[0016] 2、系统内的流量计采用槽道流量计,具有输出信号大、永久性压力损失小、流动极为稳定、抗干扰能力强等优点。 [0016] 2, the flow meter in the meter system using the channel, the output signal having a large and small permanent pressure loss, the flow is very stable, strong anti-interference advantages.

[0017] 3、本控制系统可采用常规手段实现对真空系统抽真空的操作,同时通过相应软件控制可实现系统的自动调节,应用范围更广。 [0017] 3, this control system can be achieved by conventional means for evacuating the vacuum system operation can be achieved while the system is controlled by automatic adjustment corresponding software, a wider range of applications.

附图说明 BRIEF DESCRIPTION

[0018]图1为大抽气量多支路流量精确控制系统结构不意图。 [0018] FIG. 1 is a high pumping bypass flow quantity control system architecture is not intended to accurately.

[0019]图2为大抽气量多支路流量精确控制系统真空泵抽气单元结构示意图。 [0019] FIG. 2 is a schematic view of a large amount of exhaust vacuum pump unit multidrop configuration precise flow control system.

[0020] 图3为大抽气量多支路流量精确控制系统控制原理图。 [0020] FIG. 3 is a large amount of exhaust branch flow diagram precise control system.

[0021] 其中:1、第一真空表2、真空系统3、流量计4、第二真空表5、气动调节阀6、分支吸气管路7、补气管路8、补气调节阀9、过滤网10、第三真空表11、第一压力变送器12、主管路调节阀13、第四真空表14、第二压力变送器15、主吸气管路16、真空机组17、真空泵吸气管路18、止回阀19、水环真空泵20、汽水分离器21、回水管路22、排气管路23、进水管路24、球阀25、电动开关阀26、电动机27、减速机。 [0021] wherein: a first vacuum table 2, the vacuum system 3, the flow meter 4, a second vacuum gauge 5, a pneumatic control valve 6, the intake branch line 7, line 8 qi, qi regulating valve 9, filter 10, a third vacuum gauge 11, a first pressure transmitter 12, control valve 13 the main line, the fourth vacuum gauge 14, a second pressure transducer 15, a main suction line 16, vacuum unit 17, vacuum pump suction line 18, check valve 19, water ring vacuum pump 20, a steam separator 21, return line 22, the exhaust line 23, inlet line 24, valve 25, an electric switch valve 26, motor 27, speed reducer .

具体实施方式 Detailed ways

[0022] 图1~3是本发明的最佳实施例,下面结合附图1~3对本发明做进一步说明。 [0022] FIGS. 1 to 3 are preferred embodiments of the present invention, in conjunction with the accompanying drawings 1 to 3 further illustrate the present invention.

[0023] 如图1所示,本发明的流量精确控制系统中,真空系统2上设置有第一真空表I。 [0023] As shown, the present invention is precise control of the flow system, a vacuum system 2 is provided with a first vacuum table I. 在真空系统2 —侧连接有多条分支吸气管路6,每一条分支吸气管路6分别对应真空系统2内的I个试验区域。 In the vacuum system 2 - connecting a plurality of side branch intake conduit 6, each conduit branch 6 respectively vacuum suction system I trials in the region 2. 每一条分支吸气管路6上依次串联连接有流量计3、第二真空表4、以及气动调节阀5,其中流量计3采用槽道流量计。 Each intake branch pipe 6 is connected in series with a flow meter 3, the second vacuum table 4, and the pneumatic control valve 5 in which flow meter 3 using channel flowmeter. 从真空系统2内引出的多条分支吸气管路6同时汇入主吸气管路15内,每条分支吸气管路6内的流量可达3m3/s,主吸气管路15同时并联连接有补气单元以及3组真空机组16。 A plurality of branch intake line drawn from the vacuum system 6 while 2 to import the main suction line 15, each branch intake pipe 6 up to the flow rate 3m3 / s, while the main suction line 15 and means connected in parallel with the three groups qi vacuum unit 16. 在主吸气管路15上,补气单元和3组真空机组16之间依次串联连接有第三真空表10、第一压力变送器11、主管路调节阀12、第四真空表13以及第二压力变送器14,第一压力变送器11和第二压力变送器14为绝压传感器。 On the main suction line 15, in series between the unit and the 3 groups qi vacuum unit 16 is connected to a third vacuum gauge 10, a first pressure transmitter 11, control valve 12 the main line, and the fourth vacuum gauge 13 a second pressure transmitter 14, a first pressure transducer 11 and pressure transducer 14 is a second absolute pressure sensor. 补气单元为两条并联的补气管路7,在每条补气管路7上分别串联连接有补气调节阀8,在每条补气管路7的末端设置有过滤网9。 Qi qi unit two parallel line 7, are connected in series to the control valve 8 qi, qi provided at the end of each line of the filter screen 7 9 7 on each line qi. 真空机组16可根据需要设置一组或多组,补气管路7同时可根据需要设置一条或并排设置的多条。 Vacuum unit 16 may be provided as necessary one or more groups, qi line 7 can be set from a plurality of side by side, or as desired.

[0024] 如图2所示,真空机组16中的真空泵吸气管路17—端并联接入主吸气管路15,真空泵吸气管路17的另一端串联连接止回阀18之后与水环真空泵19的进气口相连,水环真空泵19的排气口通过管路与汽水分离器20相连,由水环真空泵19排出的夹杂有大量水分的气体经汽水分离器20后干燥的气体由排气管路22排出,分离出的水由回水管路21回收,回水管路21中串联连接有回水泵(图中未画出),汽水分离器20的排气口处连接有排气管路22,排气管路22的另一端连接有消音器(图中未画出)。 [0024] 2, the end of the vacuum pump suction line 17- 16 in the unit and is coupled into the main suction line 15, the other end of the vacuum suction line 17 is connected in series with the check valve 18 after the water ring vacuum pump is connected to the intake port 19 is connected via line 20 to the steam separator water ring vacuum exhaust port 19, discharged from the water ring vacuum pump 19 with a large amount of water mixed with the gas after the steam separator 20 by a drying gas discharging exhaust line 22, separated by a water recovery return conduit 21, return line 21 are connected in series with a return pump (not shown), the exhaust port 20 of the steam trap connected to an exhaust pipe path 22, the other end of the exhaust line 22 is connected to a muffler (not shown). 进水管路23依次串联连接球阀24和电动开关阀25之后与水环真空泵19的进水口相连,在进水管路23上同时设置有供水泵(图中未画出)。 Inlet conduit 23 and valve ball 24 are sequentially connected in series with the electric switching valve 25 after the water ring vacuum pump connected to inlet 19, while on the feed line 23 is provided with a water supply pump (not shown). 电动机26通过减速机27与水环真空泵19相连。 Motor 26 through the speed reducer 27 is connected to the water ring vacuum pump 19.

[0025] 如图3所示的大抽气量多支路流量精确控制系统原理图中,6KV电压接入高压开关柜Ul内,高压开关柜Ul输出端依次连接高压软启动柜U2~U4为其供电,高压开关柜Ul同时与PLC从站的DI模块及DO模块相连。 [0025] bleed large amount as shown in Fig multidrop precise flow control system diagram, the high voltage switchgear access 6KV voltage Ul, Ul high voltage switchgear high-voltage output terminal is connected sequentially soft start their counters U2 ~ U4 power supply, is connected to the high voltage switchgear Ul while DI and DO module station module and PLC. 高压开关柜U1、高压软启动柜U2~U4、电动阀门执行器U5~U7、绝压变送器U8以及正压变送器U9通过总线Profibus-DP2与PLC从站的通讯模块相连。 High voltage switchgear U1, voltage soft start counter U2 ~ U4, electric valve actuators U5 ~ U7, U8 absolute pressure transmitter and pressure transmitter U9 PLC communication module connected to the slave via the bus and Profibus-DP2. 电机启动器U10~U13同时与PLC从站的DI模块及DO模块相连。 Motor starter U10 ~ U13 simultaneously connected to the DI and DO module station module and PLC. 气动阀门定位器U14、流量计U15以及绝压变送器U16同时通过总线Profibus-DPl与PLC主站的主CPU模块相连。 Pneumatic Positioner U14, U15 and absolute pressure transmitter flowmeter U16 simultaneously connected with the master CPU module through a bus master PLC Profibus-DPl. PLC主站与PLC从站分别通过其内的通讯模块实现连接。 PLC PLC master and slave are achieved by connecting the communication module therein.

[0026] 在图3中,高压软启动柜U2~U4分别对应3组真空机组16内的三个水环真空泵19,通过高压软启动柜U2~U4分别启动三个水环真空泵19。 [0026] In Figure 3, high-voltage soft start cabinet U2 ~ U4 corresponding to the three water ring vacuum pump 19 in the vacuum unit 3 sets 16, three starting water ring vacuum pump 19, respectively, by a high pressure soft start cabinet U2 ~ U4. 电动阀门执行器U5用于控制主管路调节阀12,电动阀门执行器U6~U7分别用于控制两条补气管路7中的两个补气调节阀8。 U5 electric valve actuators for controlling the regulating valve main line 12, electric valve actuators U6 ~ U7 are used to control the two line qi qi two regulating valves 7 8. 绝压变送器U8为第一压力变送器11,正压变送器U9为串联在进水管路23上的正压力送器。 U8 is a first absolute pressure transmitter 11 pressure transmitter, pressure transmitter U9 in series in the feed line on the positive pressure transmitter 23. 电机启动器UlO对应与三条进水管路23相连的,用于为三台水环真空泵19供水的供水泵,供水泵与蓄水池(图中未画出)相连;电机启动器Ull对应与三条回水管路21中的回水泵;电机启动器U12对应回水备用泵。 Motor starter UlO three corresponding inlet conduit 23 connected, three water ring vacuum pump is used to supply water pump 19, the water supply pump and reservoir (not shown) is connected; Ull starter motor corresponding to three the return line 21 back to the pump; U12 corresponds return motor starter relay pump. 电机启动器U13为系统中冷却塔(图中未画出)内的电机,在实际系统中,三条回水管路21汇于一处后串联连接回水泵与冷却塔入水口相连。 U13 motor starter system is a cooling tower (not shown) within the motor, in a practical system, three return conduit 21 sinks after a return pump connected in series with the inlet connected to the cooling tower. 气动阀门定位器U14表示16台相同的气动阀门定位器,分别对应上述的16条DN200的分支吸气管路6上的16台气动调节阀5。 U14 pneumatic positioner 16 represents the same pneumatic valve positioner 16 respectively corresponding to the above DN200 branch suction line 16 on the pneumatic control valve 6 5. 流量计U15表示18台流量计,分别对应上述的18条分支吸气管路6上的18台槽道流量计。 18 represents a flow meter U15 flowmeters, 18 respectively corresponding to the above-described branch intake line 18 on the meter station channel 6. 绝压变送器U16对应第二压力变送器14。 U16 absolute pressure transmitter 14 corresponding to the second pressure transmitter.

[0027] 具体工作过程及原理如下:在开始运行时,操作人员首先通过PLC开启本系统内的各外围设备,包括通过电机启动器Ul3开启冷却塔内的电机,通过电机启动器UlO和电机启动器Ull分别启动供水泵和回水泵。 [0027] The specific working process, and works as follows: at the start of the operation, the operator first turns on the peripheral devices present within the system through the PLC, including Ul3 open cooling tower through the motor starter motor through the motor starter and motor starters UlO Ull respectively for the pump is started and back to the pump. 然后根据具体的试验项目及要求设定需要开启的分支吸气管路6的数量,并分别计算每条分支吸气管路6的吸气流量。 Then depending on the particular requirements of the test program set to be opened and the suction pipe branch number of 6, and were calculated for each branch intake conduit 6 of the inspiratory flow. 然后通过每条分支吸气管路6的吸气流量PLC计算出主吸气管路15内吸气的总流量,并通过该总流量计算出需要开启的水环真空泵19的数量,使所有开启的水环真空泵19的总吸气量大于主吸气管路15内的总流量。 Then through each branch intake conduit 6 inspiratory flow PLC to calculate the total flow of intake air within the main suction line 15, and the number of the water ring vacuum pump 19 to be opened by the flow meter calculates a total, so that all open water ring vacuum pump 19 is greater than the total inspiratory total flow in the main suction line 15. 然后通过PLC开启高压软启动柜U2~U4中的一台或多台,同时通过气动阀门定位器U14将需要开启的分支吸气管路6内的气动调节阀5开启到对应的开度,不需要开启的分支吸气管路6关闭。 PLC then open voltage soft start cabinet U2 ~ U4 of one or more simultaneously by a pneumatic positioner U14 will need to open a branch suction line 6 in the pneumatic control valve 5 to open the corresponding opening, not the need to open the branch intake conduit 6 is closed. 此时通过PLC开启电动阀门执行器U5~U7,通过电动阀门执行器U5~U7启动主管路调节阀12以及两个补气调节阀8的开度。 At this time, electric valve actuators open U5 ~ U7 via PLC, and two supplemental gas regulator valve 12 regulating the degree of opening valve 8 through U5 ~ U7 promoter main line electric valve actuators.

[0028] 此时,补气调节阀8与主吸气管路15上的第一压力变送器11和第二压力变送器14与两补气调节阀8形成PID回路,保证吸气压力稳定在技术要求的范围内;同时每一条分支吸气管路6上的气动调节阀5和流量计3 (流量计U15)组成PID回路,随时进行自整定,任一支路发生变化,其它支路同时进行整定,保证每一支路的流量在技术要求范围内。 [0028] In this case, qi regulating valve 8 and the main suction line 15 of the first pressure transducer 11 and the second pressure transmitter 14 and two supplemental gas control valve 8 is formed PID loop, to ensure the suction pressure stable within the technical requirements; while each intake branch pipes 6 on the pneumatic control valve 5 and flow meter 3 (meter U15) composed of the PID loop self-tuning any time, any one of a path changes, other branched for simultaneous tuning to ensure that the flow rate in each branch within specification.

[0029] 在系统运行时,PLC从站内的DI模块同时接收高压开关柜Ul以及各水泵、冷却塔电机的启停信号以及工作状态的信号,同时通过DO模块对各设备发出控制信号。 [0029] the system is running, PLC receives signals of high voltage switchgear Ul and pumps, as well as start and stop signals the operating state of the motor from the cooling tower DI module within the station while simultaneously issues a control signal to each device module DO.

[0030] 在本发明中PLC主站型号为S7-300,从站型号为ET200M,PLC主、从站之间通过光纤连接。 [0030] In the present invention, the master PLC model S7-300, ET200M slave model, the master PLC, through the optical fiber connection between slaves. PLC主站上同时连接有控制面板。 While the control panel is connected to the master PLC.

[0031] 以上所述,仅是本发明的较佳实施例而已,并非是对本发明作其它形式的限制,任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例。 [0031] The above are only preferred embodiments of the present invention only, not other forms of the present invention will be limited, and any skilled skilled in the art using the disclosed techniques may be changed or modified to content equivalent variations equally effective embodiments. 但是凡是未脱离本发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型,仍属于本发明技术方案的保护范围。 However, all without departing from the technical contents of the present invention, any simple modification based on the technical essence of the present invention is made to the above embodiment embodiment, the equivalent changes and modifications still fall within the scope of the technical solutions of the present invention.

Claims (8)

1.大抽气量多支路流量精确控制系统,包括真空系统(2),其特征在于:在真空系统(2)内设置有多个试验区域,在真空系统(2) —侧连接有多条分支吸气管路(6),每一条分支吸气管路(6)分别对应真空系统(2)内的I个试验区域,所有分支吸气管路(6)同时接入主吸气管路(15),主吸气管路(15)上依次并联连接有补气单元、压力检测调节单元以及抽真空单元,补气单元、压力检测调节单元以及抽真空单元由控制电路控制; 所述的抽真空单元为一组或三组真空机组(16),真空机组(16)中的真空泵吸气管路(17)—端并联接入主吸气管路(15),真空泵吸气管路(17)的另一端串联连接止回阀(18)之后与水环真空泵(19)的进气口相连,水环真空泵(19)的排气口通过管路与汽水分离器(20)相连,汽水分离器(20)的回水管路(21)中串联连接有回水泵,汽水分离器(20)的排气口处连接有排气管路(22 ) 1. The amount of high pumping flow branches precise control system, comprising a vacuum system (2), characterized in that: the vacuum system is provided with a plurality of test regions (2), a vacuum system (2) - connecting a plurality of side branch intake conduit (6), each branch intake conduit (6) respectively in the I-th test area (2) a vacuum system, all the branch intake conduit (6) while access to the main suction pipe (15), successively in parallel with the main suction line (15) connected qi means, pressure detecting means and a vacuum regulating means, qi means, detecting a pressure regulating unit and evacuation means controlled by the control circuit; said evacuation unit or a group of three vacuum unit (16), vacuum unit (16) in the pump suction line (17) - end and coupled into the main intake conduit (15), a vacuum pump suction line ( after 17) and the other end connected in series with a check valve (18) with a water ring vacuum pump (19) connected to an intake port connected to the water ring vacuum pump (19) and an exhaust outlet steam separator via line (20), soft drinks separator (20) a return line (21) connected in series with a return pump, steam separator (20) at an exhaust port connected to an exhaust conduit (22) ,排气管路(22 )的另一端连接有消音器,进水管路(23 )依次串联连接手动球阀(24)和电动开关阀(25)之后与水环真空泵(19)的进水口相连,在进水管路(23)上同时设置有供水泵,电动机(26)通过减速机(27)与水环真空泵(19)相连。 , The other end of the exhaust pipe (22) is connected to a muffler inlet pipe (23) connected in series after the manual ball valve (24) and an electric switching valve (25) is connected to the water ring vacuum pump (19) water inlet, in the inlet conduit (23) is provided with a water supply pump at the same time, the motor (26) is connected to the water ring vacuum pump (19) through a reduction gear (27).
2.根据权利要求1所述的大抽气量多支路流量精确控制系统,其特征在于:所述的补气单元为一条或多条并联的补气管路(7),在每条补气管路(7)上分别串联连接有补气调节阀(8),在每条补气管路(7)的末端设置有过滤网(9)。 The large amount of the exhaust flow 1 multidrop precise control system as claimed in claim wherein: said supplemental gas unit qi one or more parallel lines (7), on each line qi (7) connected in series with a supplemental gas regulating valve (8), provided with a filter (9) at the end of each supplemental gas conduit (7).
3.根据权利要求1所述的大抽气量多支路流量精确控制系统,其特征在于:所述的压力检测调节单元为设置于补气单元和抽真空单元之间的第三真空表(10)、第一压力变送器(11)、主管路调节阀(12)、第四真空表(13)以及第二压力变送器(14)。 The large amount of exhaust according to claim 1 multidrop precise flow control system, wherein: said adjusting means is a pressure detecting means and disposed to qi table third vacuum pumping between the vacuum units (10 ), a first pressure transmitter (11), the main line regulating valve (12), fourth vacuum table (13) and a second pressure transducer (14).
4.根据权利要求3所述的大抽气量多支路流量精确控制系统,其特征在于:所述的第一压力变送器(11)和第二压力变送器(14)为绝压变送器。 The large amount of the exhaust flow 3 multidrop precise control system as claimed in claim, wherein: a first pressure transmitter (11) and said second pressure transmitter (14) for the absolute variation transmitter.
5.根据权利要求1所述的大抽气量多支路流量精确控制系统,其特征在于:所述的分支吸气管路(6 )上依次串联连接有流量计(3 )、第二真空表(4)以及气动调节阀(5 )。 The large amount of the exhaust flow 1 multidrop precise control system as claimed in claim wherein: sequentially connected in series with a flow meter (3), the second branch of the vacuum gauge on suction line (6) (4) and a pneumatic valve (5).
6.根据权利要求5所述的大抽气量多支路流量精确控制系统,其特征在于:所述的流量计(3)为槽道流量计。 6. The system of precise control of a large amount of exhaust flow 5 multidrop claim, wherein: said flow meter (3) for the channel flowmeter.
7.根据权利要求1所述的大抽气量多支路流量精确控制系统,其特征在于:在所述的控制电路中,6KV电压接入高压开关柜(Ul)内,高压开关柜(Ul)输出端依次连接高压软启动柜(U2)~ (U4)为其供电,高压开关柜(Ul)同时与PLC从站的DI模块及DO模块相连,高压开关柜(Ul)、高压软启动柜(U2)~ (U4)、电动阀门执行器(U5)~ (U7)、绝压变送器(U8)以及正压变送器(U9)通过总线Profibus-DP2与PLC从站的通讯模块相连,电机启动器(UlO)~ (U13)同时与PLC从站的DI模块及DO模块相连,气动阀门定位器(U14)、流量计(U15)以及绝压变送器(U16)同时通过总线Profibus-DPl与PLC主站的主CPU模块相连,PLC主站和从站之间通过光纤连接。 7. The system of precise control of the large amount of exhaust to flow multidrop claim 1, wherein: the control circuit, the inner high voltage switchgear access 6KV voltage (Ul), high voltage switchboard (Ul) sequentially connecting the high voltage output terminal of soft start cabinet (U2) ~ (U4) is connected simultaneously from the module DO and DI module for power stations, high voltage switchboard (Ul) and PLC, high voltage switchgear (Ul), high-voltage soft start cabinet ( U2) ~ (U4), electric valve actuators (U5) ~ (U7), absolute pressure transmitter (U8) and a pressure transmitter (U9) PLC communication module connected to the slave via the bus and Profibus-DP2, motor starter (UlO) ~ (U13) is connected while the DI and DO module station module and PLC, pneumatic positioner (U14), a flow meter (U15) and the absolute pressure transmitter (U16) via the bus simultaneously Profibus- DPl master CPU module and the PLC is connected to the master station, PLC master station and the slave station through the optical fiber.
8.根据权利要求7所述的大抽气量多支路流量精确控制系统,其特征在于:所述的PLC主站型号为S7-300,PLC从站型号为ET200M。 A large amount of suction according to claim 7, wherein said multi-branch precise flow control system characterized in that: said master station model the S7-300 PLC, slave PLC model ET200M.
CN201410021964.4A 2014-01-18 2014-01-18 Multi-branch accurate flow control system with large sucking rate CN103727051B (en)

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