CN205352481U - Mass -flow liquid flowmeter - Google Patents

Abstract

The utility model discloses a mass -flow liquid flowmeter, divide and the changer including sensor portion, sensor portion divides including the housing and double surveys buret that is the U -shaped structure, all is equipped with coil brace, last drive coil and the detecting coil laid of coil brace on the double middle part of surveying buret and both ends, the changer of changer for taking zigBee communication module takes zigBee communication module's changer to pass through zigBee communications network module and cloud computing platform realization communication connection, cloud computing platform realizes communication connection with user's customer end, cloud computing platform still realizes communication connection through GSM module and user's cell -phone. The utility model discloses reach cloud computing platform with the flow in real time, user's accessible user mobile terminal downloads flow data, when the flow exceedes the threshold value of setting for, can send super flow to user's cell -phone and remind the SMS, when the flow data appearance was unusual, steerable body alarm was reported to the police, reminds the user.

Description

A kind of big flow liquid effusion meter

Technical field

This utility model relates to a kind of big flow liquid effusion meter.

Background technology

Coriolis mass flowmeters is a kind of novel instrument directly and critically measuring liquid mass flow, if while pipe synchronous vibration therein, direct fluid in pipe, so as to along managing interior flow forward, then pipe will force fluid up-down vibration therewith, fluid is in order to revolt this forced vibration, can to one counteracting force vertical with its flow direction of pipe, under this effect being called Coriolis effect power, the vibrations of pipe are asynchronous, entrance pipe and outlet section pipe there will be difference on the time of vibration, (difference coriolis force direction suffered by entrance and outlet section fluid is contrary), this is called phase time difference.This species diversity is directly proportional to the size of the liquid mass flow flowing through pipe；If the size of this time difference can be detected by circuit, then just the size of mass flow can be determined.This effusion meter is referred to as coriolis mass flowmeters, it with in the world at present tens kinds of conventional volumetric flowmeters maximum be not both the size of the quality that it surveys, the unit of use is kg/min.Accurate and constant with the volumetric flowmeter of effusion meter ratio volume (such as liter or the cubic meter) office of quality (as kilogram) office.Coriolis mass flowmeters has accuracy, repeatability, stability, does not have flow blocking element and movable member in fluid passage simultaneously, thus its good reliability, long service life, moreover it is possible to measure the flow of high viscosity fluid and gases at high pressure.At industrial departments such as oil, chemical industry, metallurgy, building materials, papermaking, medicine, food, biological engineering, the energy, space flight, its application is also more and more extensive.

Wherein coriolis mass flowmeters belongs to LNG(LiquefiedNaturalGas, liquefied natural gas) aerating measuring equipment, along with the high speed development of LNG technology, the functional requirement of aerating equipment is higher, required occasion increases；The effusion meter cast that different flow size is suitable for is different.

Utility model content

This utility model provides a kind of big flow liquid effusion meter, being particularly suitable for the LNG aerating metering of big flow (150-1800kg/min), the cast measuring pipe is inverted " u "-shaped structure, it is easy to bending forming, making meter overall compact conformation, volume reduces simultaneously；Adopt double pipe structure can reduce the sensitivity of external shock, it is easy to realize the measurement of phase contrast.

To achieve these goals, this utility model adopts the following technical scheme that

A kind of big flow liquid effusion meter, including Sensor section and transmitter, it is connected by connecting rod between described Sensor section and transducer portion, described connecting rod is provided with heat absorbing sheet, described Sensor section includes the case being " u "-shaped structure and measures pipe with double, described double measurement pipe is located in case, the middle part of described case is connected to adapter sleeve, the two ends of described double measurement pipe adopt fixed block clamping near port, the middle part and two ends of double measurement pipe are equipped with coil brace, wherein it is positioned on the coil brace in the middle part of double measurement pipe and lays driving coil, it is positioned on the coil brace at double measurement pipe two ends and lays detection coil, the lead-in wire of described driving coil and the lead-in wire of detection coil pass respectively from adapter sleeve；Described transmitter is the transmitter with ZigBee communication module, and the described transmitter with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform；Described cloud computing platform realizes communication connection by wireless communication module with subscription client；Described cloud computing platform realizes communication connection also by gsm module with user mobile phone；Being additionally provided with the body alarm with ZigBee communication module on described big flow liquid effusion meter, the described body alarm with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform.

Further, described double measurement pipe is made up of two testing tubes being arranged in parallel, and is respectively adopted contiguous block positioning clamping at the two ends of double measurement pipe.

Further, the inwall of described adapter sleeve is provided with step surface, and this step surface is lined with copper sheathing, and described adapter sleeve inwall is fitted with wiring pedestal, and the end face of described wiring pedestal is placed on copper sheathing, through the copper post having wiring in described wiring pedestal.

This utility model has the advantages that

(1) cast measuring pipe is inverse u shape, being prone to bending forming, make meter overall compact conformation simultaneously, volume reduces, double pipe structure can reduce the sensitivity of external shock, easily realizing the measurement of phase contrast, simple in construction, operation simplifies, easy to use, with low cost, it is adaptable to the LNG aerating metering of big flow (150～1800kg/min), there is stronger popularization and using value；

(2) flow is uploaded to cloud computing platform by ZigBee communication mixed-media network modules mixed-media by transmitter with ZigBee communication module in real time, and user can pass through customer mobile terminal downloading flow data, convenient inquiry；

(3) when flow exceedes the threshold value of setting, cloud computing platform can pass through GSM communication module and send super flow reminding short message to user mobile phone, facilitates user to hold the control of flow, contributes to energy-conserving and environment-protective；

(4) when data on flows occurs abnormal, cloud computing platform can be reported to the police by the body alarm that ZigBee communication mixed-media network modules mixed-media controls with ZigBee communication module, reminds user.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, this utility model is elaborated:

Fig. 1 is the cut-away view of the big flow liquid effusion meter that this utility model embodiment provides；

Fig. 2 is the front view of Fig. 1；

Fig. 3 is the left view of Fig. 2；

Fig. 4 is the overall structure schematic diagram of the big flow liquid effusion meter that this utility model embodiment provides；

Fig. 5 is the schematic diagram of the connection wire sealing structure of the big flow liquid effusion meter that this utility model embodiment provides；

Fig. 6 is the circuit structure block diagram of the big flow liquid effusion meter that this utility model embodiment provides.

Detailed description of the invention

By the examples below, and in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.

As shown in Figures 1 to 5, the big flow liquid effusion meter of this utility model includes: Sensor section 5 and transducer portion 4, is connected by connecting rod 6 between Sensor section 5 with transducer portion 4, and connecting rod 6 is provided with heat absorbing sheet 7.When LNG is by Sensor section 5, Sensor section 5 sharp temperature drop, low temperature can be delivered to transducer portion 4 by the gas of connecting rod 6 with sensor internal, first connecting rod 6 have certain length make transmitter spatially with Sensor section 5 from, just have partial loss during low temperature transmission；Heat absorbing sheet 7 is made up of aluminium alloy, big with normal temperature air contact surface, and according to hot transfer principle, heat absorbing sheet 7 absorbs the heat in the external world and is transmitted to rapidly connecting rod 6, makes the temperature of connecting rod 6 increase, and such Conduction At Low Temperature is less than transducer portion 4, it is ensured that transmitter normal operation；When transmitter energy normal operation, transmitter as one, can take up room little with sensor, easy for installation.

Sensor section 5 includes the case being U-shaped structure and double measurement pipe 1, it is easy to bending forming, makes processing extremely convenient quick, meanwhile, and can by the LNG stream body of big flow in U-shaped double measurement pipe 1；Double measurement pipe 1 is located in case, the middle part of case is connected to adapter sleeve 8, the two ends of double measurement pipe 1 adopt fixed block 2 to clamp near port, the middle part and two ends of double measurement pipe 1 are equipped with coil brace 3, wherein it is positioned on the coil brace 3 in the middle part of double measurement pipe 1 and lays driving coil, vibration for double measurement pipe 1 provides power source, and therefore the position of this driving coil brace 3 determines the vibration stimulus position of double measurement pipe 1；It is positioned on the coil brace 3 at double measurement pipe 1 two ends and lays detection coil；Two groups of detection coils need mounting magnetic steel and detection coil, measure phase contrast at the two ends of double measurement pipe 1 with electromagnetic principle, just can be calculated the data such as quality, flow, density by transmitter.The lead-in wire of coil and the lead-in wire of detection coil is driven to pass from adapter sleeve 8 respectively.

Two double measurement pipes 1 are carried out clamping position at the two ends of double measurement pipe 1 near port by fixed block 2, so that two testing tubes are parallel to each other and form double pipe structure, it is possible to decrease the sensitivity of external shock, it is easy to realize the measurement of phase contrast；Two groups of fixed blocks 2 weld with double measurement pipe 1, play the effect at fixing two ends, determine double measurement pipe 1 and shake length and the vibration frequency of end；Adopt double pipe structure can reduce the sensitivity of external shock, it is easy to realize the measurement of phase contrast；Mouth of pipe angle a=90 ° between two ends and the mouth of pipe face of buret, it is easy to bending forming, makes processing extremely convenient quick；The cast A/F of double measurement pipe 1 and cast height influence whether the vibration frequency of double measurement pipe 1, it is thus desirable to control cast A/F S1=350-400mm, cast height S2=380-430mm, just can ensure that double measurement pipe 1 is under specified vibration frequency, measure phase contrast with electromagnetic principle, the data such as quality, flow, density could be calculated by transmitter.

The inwall of adapter sleeve 8 is provided with step surface, and this step surface is lined with copper sheathing 10, and adapter sleeve 8 inwall is fitted with wiring pedestal, and the end face of wiring pedestal is placed on copper sheathing 10, through the copper post 11 having wiring in wiring pedestal.Wiring pedestal is the base of ceramic 9 adopting pottery to make, and between adapter sleeve 8, base of ceramic 9, copper sheathing 10 and copper post 11, arbitrary contact surface all adopts vacuum brazing mode to be connected.The copper post 11 of wiring is connected with each holding wire, after being then passed through wiring pedestal, and is padded on the step surface in adapter sleeve 8 by copper sheathing 10, then is placed in by wiring pedestal on this copper sheathing 10.Owing to pottery is different from the stainless steel hot coefficient of expansion, base of ceramic 9 and adapter sleeve 8 are by together with Welding, so pottery is likely to occur and breaks when thermal expansion or cold events, it is thus desirable to the upper copper sheathing 10 of pad is as contraction or expansion transition, avoid sealing structural deterioration, isolation between Sensor section 5 and the external world of effusion meter can be formed good sealing effectiveness, so that the working stability of whole Sensor section 5, it can be ensured that the performance of whole effusion meter；Copper sheathing 10 is as transition, seal structure when variations in temperature expansion or shrinkage all without destroyed, therefore used in effusion meter, its original shape and structure can be kept, therefore under room temperature and low temperature environment, all can reach good sealing effectiveness, the phenomenons such as gas leakage will not be there is, it is ensured that the working stability of Sensor section 5 in whole effusion meter；The mode adopting vacuum brazing is welded at the contact surface place of all parts, can form effective sealing, be completely cut off at the two ends of connecting tube, and adopts welding manner to seal, and sealing is more reliable, will not produce at low ambient temperatures to seal phenomenon incessantly.

Transducer portion 4 is used for driving and the conversion of flow detecting signal, computing and flow indication, the signal output etc. of Sensor section 5, and transducer portion 4 is mainly made up of partial circuits such as power supply, driving, detection, displays.

During use, the vibration that coil is double measurement pipe 1 is driven to provide power, when LNG passes through from double measurement pipe 1, the double measurement pipe 1 of this driving coil drive vibrates, now, LNG stream body, in order to revolt this forced vibration, can give 1 one counteracting forces vertical with its flow direction of double measurement pipe namely Coriolis effect power；Owing to the vibrations of double measurement pipe 1 are asynchronous, entrance pipe and outlet section pipe there will be difference on the time of vibration, (difference coriolis force direction suffered by entrance and outlet section fluid is contrary), it is positioned on the coil brace 3 in the middle part of double measurement pipe 1 and lays driving coil, it is positioned on the coil brace 3 at double measurement pipe 1 two ends and lays detection coil, record the fluid difference of gateway section in double measurement pipe 1 respectively, calculate the size of flow in detection pipe thereby through this difference.

Case is mainly used in wrapping up double measurement pipe 1, and the vibration for double measurement pipe 1 provides enough space, the lead-in wire driving coil and detection coil all adopts the mode of fly line to be connected on coil, and this lead-in wire is directly connected set 8 from casing interior and accesses transmitter circuit plate again；Hence in so that lead-in wire is no longer attached on double measurement pipe 1, the weight making lead-in wire itself will not be attached on double measurement pipe 1 equally, then the impact on double measurement pipe 1 measuring accuracy can be effectively prevented from, it can be ensured that whole double measurement pipe 1 measuring accuracy so that the test of effusion meter is more accurate；Lead-in wire is welded on coil simultaneously, so that it does not have break-off, improves the stability of flow meters work；Temperature sensor is arranged at one end of double measurement pipe 1, this end is entrance point, owing to the fluid in double measurement pipe 1 is LNG, the fluid of ultralow temperature can be quickly transferred on the tube wall of metal material, the holding wire of temperature degree sensor penetrates insulation tube, introduce adapter sleeve 8 along case by chute, be then passed through adapter and access in transmitter；Therefore can be affixed on the outer wall of double measurement pipe 1 by this temperature sensor, thus detecting the fluid temperature values within double measurement pipe 1 approx, then it is easy to whole effusion meter multiple values such as the flow of LNG, temperature in double measurement pipe 1 are detected so that it is the scope of application is wider.

As shown in Figure 6, described transmitter is the transmitter with ZigBee communication module, and the described transmitter with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform；Described cloud computing platform realizes communication connection by wireless communication module with subscription client；Described cloud computing platform realizes communication connection also by gsm module with user mobile phone；Being additionally provided with the body alarm with ZigBee communication module on described big flow liquid effusion meter, the described body alarm with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform.Flow is uploaded to cloud computing platform by ZigBee communication mixed-media network modules mixed-media by transmitter with ZigBee communication module in real time, and user can pass through customer mobile terminal downloading flow data, convenient inquiry.When flow exceedes the threshold value of setting, cloud computing platform can pass through GSM communication module and send super flow reminding short message to user mobile phone, facilitates user to hold the control of flow, contributes to energy-conserving and environment-protective.When data on flows occurs abnormal, cloud computing platform can be reported to the police by the body alarm that ZigBee communication mixed-media network modules mixed-media controls with ZigBee communication module, reminds user.

Above-described embodiment, simply to illustrate that technology of the present utility model design and feature, its objective is to be in that to allow one of ordinary skilled in the art will appreciate that content of the present utility model and to implement according to this, can not limit protection domain of the present utility model with this.The change of every equivalence done by the essence of this utility model content or modification, all should be encompassed in protection domain of the present utility model.

Claims (3)

1. a big flow liquid effusion meter, it is characterized in that: include Sensor section and transmitter, it is connected by connecting rod between described Sensor section and transducer portion, described connecting rod is provided with heat absorbing sheet, described Sensor section includes the case being " u "-shaped structure and measures pipe with double, described double measurement pipe is located in case, the middle part of described case is connected to adapter sleeve, the two ends of described double measurement pipe adopt fixed block clamping near port, the middle part and two ends of double measurement pipe are equipped with coil brace, wherein it is positioned on the coil brace in the middle part of double measurement pipe and lays driving coil, it is positioned on the coil brace at double measurement pipe two ends and lays detection coil, the lead-in wire of described driving coil and the lead-in wire of detection coil pass respectively from adapter sleeve；Described transmitter is the transmitter with ZigBee communication module, and the described transmitter with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform；Described cloud computing platform realizes communication connection by wireless communication module with subscription client；Described cloud computing platform realizes communication connection also by gsm module with user mobile phone；Being additionally provided with the body alarm with ZigBee communication module on described big flow liquid effusion meter, the described body alarm with ZigBee communication module realizes communication connection by ZigBee communication mixed-media network modules mixed-media with cloud computing platform.

2. big flow liquid effusion meter according to claim 1, it is characterised in that: described double measurement pipe is made up of two testing tubes being arranged in parallel, and is respectively adopted contiguous block positioning clamping at the two ends of double measurement pipe.

3. big flow liquid effusion meter according to claim 1 and 2, it is characterized in that: the inwall of described adapter sleeve is provided with step surface, this step surface is lined with copper sheathing, described adapter sleeve inwall is fitted with wiring pedestal, the end face of described wiring pedestal is placed on copper sheathing, through the copper post having wiring in described wiring pedestal.