The cross section of air flow measuring apparatus

ZW-HJM series The cross section of air flow measuring apparatus Is a new type. It is measured by the…

Description：

、產(chǎn)品概述：">、產(chǎn)品概述：">Productoverview:

ZW-HJM series The cross section of air flow measuring apparatus Is a new type. 、矩形或其他異型截面管道）測量段橫截面測風(fēng)裝置的面積和流體通過該面積的軸向平均流速，根據(jù)被測管道截面形狀和大小尺寸的不同

，在其內(nèi)部安裝了多個(gè)結(jié)構(gòu)******的均速管。">It is measured by the closed pipeline (circular, rectangular or other special-shaped pipe) cross section measuring device measuring section area and the area of the fluid through the axial mean velocity, according to the measured cross-section shape and size is different in its internal structure, multiple unique pitot tube installation. ，從而得出流量。">The average pressure differential pressure, so as to get traffic.

。">The cross section flow meter can be used for a variety of wind volume measurement of power plant boiler duct and outside, can be used to measure the volume of various fan and other places of the gas flow measurement.

，按JJG835-93檢定，無需標(biāo)定

。">The cross section flowmeter manufactured by GB/T2624-2006 and GB1236-2000 according to the JJG835-93 design, verification, without calibration.

Two, work principle:

，如果管道內(nèi)的流速是穩(wěn)定、確切的形式

，則在管道中流速分布是自管壁等于零連續(xù)變化到管道中心的zui大流速

。">ZW-HJM series of cross section of air flow measurement device in a straight pipe and sufficient air flow distribution has certain regularity under the premise, if the pipeline flow rate is stable, the exact form in the pipe flow distribution is equal to zero since the wall changes continuously to the center of the pipe flow zui. ，在這個(gè)點(diǎn)上所測的流速即是平均流速

。">It can always find a point in the middle of the process of change, measured at this point is the average velocity of flow. ，由于直管段限制

，管道中的氣流分布不均

，實(shí)際風(fēng)速分布也沒有一定規(guī)律可遵循

，但可以將測量流速的截面分割為許多小的單元面積Ai

。">But in the actual work site, because the straight section limit flow pipe is not evenly distributed, the actual wind speed distribution is not a rule, but can measure velocity of cross section is divided into many small unit area of Ai. ，則總的流量就等于流過多個(gè)所有小單元面積的流量之和。">Assume that each unit area of the flow rate was Vi, the total flow rate is equal to the flow through all of a plurality of small unit area traffic and. That is:

。">This method is called the velocity area method. 。">This method has been widely used in the international organization for standardization, and formulate the corresponding measurement standard. 。">When the unit to divide the area more, the flow rate should be more accurate. ，就是基于這個(gè)原理而設(shè)計(jì)出來的

，并在實(shí)際應(yīng)用中得到了證實(shí)

。">The cross section measuring device type flowmeter, is designed based on this principle, has been proved in the practical application.

Three, main features:

、通過管道橫截面測風(fēng)裝置上的各點(diǎn)的流速雖不是等速的，但要求它是穩(wěn)定的

。">1, the flow rate of each point on the pipe cross section measuring device is not constant, but it is stable. ，安放在測速裝置的上游

。">Harsh environment applications installed in the pipeline by the flow regulator, placed in the upstream speed measuring device. ，將不穩(wěn)定的流體變成一束束穩(wěn)定的流體

，從而進(jìn)行準(zhǔn)確的測量

。">It is in the same length, the unsteady fluid into a bunch of stable fluid, so as to make accurate measurements.

、由于通過管道橫截面測風(fēng)裝置上的各點(diǎn)的流速不是相等的

，要求傳感器測出的數(shù)值盡可能接******均值

。">2, because the pipe cross section measuring device of the points on the flow rate is not equal, the numerical requirements of sensor measured as close to the average. 。">In the structure to produce the velocity and the average. ，來檢測氣流總壓和靜壓

。">Multi point automatic detection probe in accordance with the principle of balancing the pitot tube, to detect air static pressure and total pressure.

、不需要前后直管段

，只要有250～300mm 長的安裝位置即可

。">3, does not need the straight pipe section, as long as there is 250 ~ 300mm long installation location.

、可以測量30°角的氣流，不受不規(guī)則流體

、甚至是多向旋轉(zhuǎn)氣流的影響。">4, the measurement of gas flow angle of 30 degrees, the irregular fluid, and even influence the multidirectional rotating flow.

、不需要現(xiàn)場標(biāo)定

，即流量系數(shù)K=1

。">5, do not need to field calibration, i.e. the flow coefficient K=1.

、壓力損失很小

。">6, the pressure loss is very small.

，大大降低堵塞的可能性

。">7, positive pressure and static pressure holes are hole flow direction, greatly reduce the possibility of blockage.

、技術(shù)參數(shù)：">Four, technical parameters:

、管道形狀：矩形和圓形等異型管道

。">1, pipe shape: rectangular and circular shaped pipe.

、精度：1%

、1.5%">2, accuracy: 1%, 1.5%

、重復(fù)性：±1%">3, repeat: + 1%

、管徑：50≤D≤5000mm">4, diameter: 50 = D = 5000mm

、工作溫度：-50 ～ 450 ℃">5, working temperature: -50 to 450 DEG C

6, working pressure: 0 ~ 16Mpa

、參照標(biāo)準(zhǔn)：GB/T2624-2006、GB1236-2000及JJG835-93">7, standard: GB/T2624-2006, GB1236-2000 and JJG835-93

、連接方式：法蘭連接、焊接">8, connection: flange connection, welding

、氣體流速需大于4m/s">9, the gas flow rate must be greater than 4m/s

Five, structure:

、矩形管道結(jié)構(gòu)

。">The cross section flow meter according to the pipeline form is divided into: circular pipe structure, rectangular pipe structure. 。">At the same time divided into rectifier cascade and cascade rectifier. The specific structure below:

，它的外形及尺寸與風(fēng)管道******一樣

，其兩端為圓形或矩形法蘭

，可以通過法蘭與管道連接。">ZW-HJM type cross section duct type flowmeter, its shape and size of the wind pipe is exactly the same, the two ends of circular or rectangular flange, flange and pipe can be connected by.

、選型編碼：">Seven, the selection of encoding:

Specifications						Explain
ZW- HJM	Zhongwei control					Cross section of air flow sensor
Diameter measurement DN		50-				DN50
		65-				DN65
		80-				DN80
		100-				DN100
		125-				DN125
		150-				DN150
		200-				DN200
		225-				DN225
		250-				DN250
		300-				DN300
		350-				DN350
		400-				DN400
		450-				DN450
		500-				DN500
		600-				DN600
		800-				DN800
		900-				DN900
		1000-				DN1000
Working pressure PN			One			0.6 MPa
			Two			1.6 MPa
			Three			2.5 MPa
			Four			4 MPa
			Five			6.4 MPa
			Six			10 MPa
working temperature DEG				One		120 degrees below
				Two		220 degrees below
				Three		380 degrees below
Pipe material					C	carbon steel
					S	Stainless steel
					Zero	Other materials

Types of marking method:

ZW-HJM-DN - -PN - C/S/O - cross section of air flow sensor

；- HJM——橫截面風(fēng)量傳感器">ZW - - HJM - basic model; cross section air flow sensor

，為公稱通徑1000㎜

。">DN - - nominal diameter (mm) such as DN1000, nominal diameter 1000 mm.

。">PN - - nominal pressure (Mpa) such as PN0.1, for the nominal pressure of 0.1 Mpa.

，O其它材質(zhì)

。">C/S/O pipe material: C steel, S stainless steel, O and other materials.

Eight, design selection and ordering information:

、被測介質(zhì)名稱；">1, the measured medium;

、常用

、大小流量（m3/h）；">2 commonly used, and the flow rate (m3/h);

、工作壓力（Mpa）、工作溫度（℃）

、Z高壓力（Mpa）

、Z高溫度（℃）；">3, working pressure (Mpa), temperature (c), Z (Mpa), Z high pressure high temperature (C);

、介質(zhì)密度、粘度

；">4, medium density and viscosity;

、管道材質(zhì)、內(nèi)徑

、外徑；">5, pipe material, diameter, diameter;

、現(xiàn)場管道敷設(shè)情況和局部阻力件形式

。">6, field piping and local resistance piece.

，請參閱相應(yīng)的說明書，選用合適的型號(hào)或由我公司技術(shù)人員根據(jù)您提供的資料替您設(shè)計(jì)選型

。">7, you need to display instrument Zhongwei control, please refer to the corresponding instructions, the appropriate choice of models or provided by the technical personnel of our company according to your information for your selection.

、如有特殊要示

，請與我公司銷售部聯(lián)系

。">8, if there are special to show, please contact our sales department.

Customer service service commitment:

，負(fù)責(zé)免費(fèi)維修。">1, our series of flowmeter series product quality problems occur in less than twelve months, is responsible for free repair.

、質(zhì)保期內(nèi)如我公司產(chǎn)品出現(xiàn)任何質(zhì)量問題

，我公司負(fù)責(zé)免費(fèi)維修或更換。">2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.

、質(zhì)保期內(nèi)如用戶使用不當(dāng)，造成產(chǎn)品損壞

，我公司負(fù)責(zé)維修

，收取損壞部件成本費(fèi)。">3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.

、質(zhì)保期后產(chǎn)品, 出現(xiàn)質(zhì)量問題

，我公司負(fù)責(zé)維修，收取損壞部件成本費(fèi)

。">4, the warranty period after the product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.

、如用戶需我公司現(xiàn)場服務(wù)，對省內(nèi)用戶我公司服務(wù)人員12小時(shí)內(nèi)到達(dá)現(xiàn)場

，省外用戶48小時(shí)內(nèi)到達(dá)現(xiàn)場

。">5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.

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