CN101253394B - 冲压探头 - Google Patents
冲压探头 Download PDFInfo
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- CN101253394B CN101253394B CN2005800510639A CN200580051063A CN101253394B CN 101253394 B CN101253394 B CN 101253394B CN 2005800510639 A CN2005800510639 A CN 2005800510639A CN 200580051063 A CN200580051063 A CN 200580051063A CN 101253394 B CN101253394 B CN 101253394B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/363—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction with electrical or electro-mechanical indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/50—Correcting or compensating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
Abstract
有两个输送管的冲压探头,其中两个输送管彼此分开并且它们的一端通向一个压力测量传感器,该冲压探头有一个流体差压增加元件并且在每个输送管相应的另一端有一个开口,所述多个开口被安排在不同的位置,在这些位置间由于差压增加元件的作用而产生的差压值高于流动流体的动态压力值,并且所有这些开口(9a、9b)被安排成如下方式:垂直轴与在测量过程中占优势的流动的方向(S)成一定角度穿过开口表面。
Description
技术领域
本发明涉及一种根据权利要求1前序部分的特征的冲压探头。
背景技术
这种类型的一个冲压探头是公知的,例如EP0198197A2中所公开的。
该已知冲压探头有如下缺点:通过一个输送管连接到实际压力传感器的多个开口部分地指向流动的相反方向,并因此同样通过流动传输的外来物质能够进入这些开口,因此造成测量伪值。
由于多个开口在将压力传递给实际压力传感器的输送管的侧面区域内的安排,外来物质几乎不可能会自己再次离开输送管。事实上,外来物质很可能会继续保留在输送管内并且永久地造成测量的错误结果。
发明内容
本发明的一个目的是提供一种冲压探头,在该冲压探头中原则上通过建设性措施降低了外来物质进入多个开口的可能性。
另一个目的是提供一种冲压探头,在该冲压探头中同样通过建设性措施使得依然进入冲压探头的外来物质有可能以简单的方式再次离开。
高级目的是确保冲压探头在较长期间的测量准确性,即使在测量的流体中有外来物质。
根据本发明要求保护的特征部分可以实现这个目的。
多个开口和在测量过程中占优势的流动的方向成一定角度的安排防止了混入的外来物质被带到输送管内部。
本发明的进一步特征涉及本发明的发展和/或具体的优化。
导致发展出本发明的考虑是基于以下事实:压力作用在所有方向上并且,为了探测冲压,通过一个输送管向实际压力传感器传递冲压的开口不需要指向流动的方向。因此如果所述开口设置在一个冲击表面附近就足够了。
根据本发明的一方面,提供一种冲压探头,该冲压探头包括:两个输送管,所述两个输送管彼此分开并且其一端通向一个压力测量传感器;一个流体力学的差压增加元件;在每个所述输送管的相应的另一端的一个开口,这些开口被安排在不同位置,在所述位置间由于所述差压增加元件的作用而产生与流动流体的动态压力值相比差压的一个较大值,所有开口(4a、4b)被安排成使垂直轴以相对于在测量过程中占优势的流动的方向(S)成一定角度延伸通过开口表面,所述开口处于相同的水平。
根据本发明的进一步方面的冲压探头,提供了一个差压增加元件,混入所述流动中的外来物质冲击该差压增加元件并且从该差压增加元件上回弹。
根据本发明另一方面的冲压探头,其中开口(4a、4b)被定向为使沉积在所述输送管(5a、5b)中的外来物质可以以遵循重力的方式离开所述输送管(5a、5b)。
根据本发明另一方面的所述冲压探头,其中所述输送管(5a、5b)有一个圆锥形延伸的横截面并且该横截面在所述开口(4a、4b)的区域内比在通向所述压力测量传感器的所述输送管(5a、5b)的那端大。
根据本发明另一方面的所述冲压探头,其中所述差压增加元件(6)有一个分隔边缘。
根据本发明另一方面的所述冲压探头冲压探头,其中所述差压增加元件(6)被安排在所述输送管(5a、5b)的轴之间,以便它突出到所述输送管的所述开口(4)外。
根据本发明另一方面的的冲压探头,其中所述差压增加元件(6)有用于所述流动流体的一个路径延伸部。
根据本发明的一个方面,提供一种包含本发明冲压探头的冲压测量仪,所述冲压探头被插入到一个闭合的管内,以便穿过所述开口表面的所述垂直轴相对于在测量过程中占优势的流动的所述方向(S)成一定角度延伸。
根据本发明的一个方面,提供一种包含本发明冲压探头的冲压测量仪,所述冲压探头可插入到一个敞开的管内,以便所述探头位于流动介质中并且通过所述开口的所述开口表面的所述垂直轴以相对于在测量过程中占优势的流动的所述方向(S)成一定角度延伸。
附图说明及具体实施方式
下面参考附图更详细地解释本发明。
图1示出了根据现有技术的一个冲压测量仪1的横截面,该冲压测量仪延伸到一个管2中。介质在所述管2中在方向S上运动。冲压传感器2具有与流动的方向相反的多个开口3和在流动的方向上的一个开口4。
在公知的方式中,在一方面的多个开口3和在另一方面的开口4之间有一个压差,该压差取决于介质的流动速率。混入介质中的外来物质5可以进入多个开口3,然后落入到冲压传感器内的底部6并在此积聚或在冲压传感器内随机四处打转。
这可以导致冲压传感器的测量特性的不希望的改变。
图2示出了根据本发明延伸入一个管8中的一个冲压测量仪7的横截面。介质同样在所述管8中在方向S上运动。
流动/流体测量仪有两个开口9a和9b,所述两个开口9a和9b在所示的实例中朝下。开口9a和9b被一个表面区域分隔开。这个表面区域起到一个差压增加元件11的功能并且可以有不同的形状以便实现这个功能。在所示的示例中,所述差压增加元件11被设计成一个平表面。
所述介质S冲击作用于差压增加元件11。在介质所冲击作用的表面附近,由于冲压产生了压力增加。随介质绕差压增加元件11流动,它的速度按一种已知的方式增加并因此一个负压在差压增加元件11背对流动的那侧上占优。
这些开口9a和9b被安排成使开口9a位于压力增加的区域内而开口9b位于压力减少的区域内,并且由于流动介质及其作用于差压增加元件11的冲击,在两个开口9a、9b之间产生一个压差。这个压差取决于流动速率。
这些开口9a和9b各自形成独立输送管10a和10b的末端,在输送管10a和10b的另一端设置了多个传感器用于测量压差。这些传感器位于管8的外部并且在此没有被图释。
图3示出了从流动介质要冲击的方向观察的一个冲压传感器的可能示例性实施例。
该冲压传感器有一个外壳12,压力传感器位于该外壳中。当压力传感器使用时,这个外壳位于流动介质外部。接触介质的压力传感器的部分,即探头13,向下伸出到这个外壳之外。
位于探头13的较低端的是指向下的多个开口。在这个视图中仅能看到一个开口14a。探头13在它的近端有一个表面区域,如参考图2已解释的,该表面区域作为差压增加元件16。
图4所示是沿线IV的一个截面。在这个图示中,现在也可以看到通向外壳12内实际压力传感器(这里未示出)的输送管15a和15b。一个差压增加元件16被安排在多个输送管之间。这个差压增加元件16从输送管15a和15b之间突出。流动S冲击作用于差压增加元件16上并且产生一个冲压,该冲压通过开口14a和输送管15a到达压力传感器。
差压增加元件16有一个分隔边缘17。在差压增加元件16背离流动的那侧上产生负压。这个负压的值可以通过另一个压力传感器进行探测。这个压力传感器位于输送管15b的另一端。
该冲压测量仪优选地被安装在这样一个位置:使得冲压探头13基本垂直地向下。该安装位置导致冲击介质产生冲压,而不用通过开口14a被直接推入输送管15a。
就混入到流动中的外来物质冲击探头13的程度来说,它们首先和差压增加元件16接触,接着从后者回弹。
基本垂直向下的安装位置也导致这些回弹的外来物质由于重力下落并且同样防止它们进入开口14a。
然而,如果一种外来物质依然由于涡旋的产生而通过开口14进入输送管15,则输送管14的圆锥形的外形导致外来物质经常碰撞输送管壁,该锥形外形在压力传感器的方向上不断变窄;所述壁仿佛“头在前”地延伸并因此对沉积物提供了极少的在壁上沉积的附着点。
输送管15的直径尺寸做成使得在液体外来物质的情况下不会产生毛细管吸引。
Claims (9)
1.一种冲压探头,该冲压探头包括:
-两个输送管,所述两个输送管彼此分开并且其一端通向一个压力测量传感器;
-一个流体力学的差压增加元件;
-在每个所述输送管的相应的另一端的一个开口,这些开口被安排在不同位置,在所述位置间由于所述差压增加元件的作用而产生与流动流体的动态压力值相比差压的一个较大值,
其特征在于:
所有开口(4a、4b)被安排成使垂直轴以相对于在测量过程中占优势的流动的方向(S)成一定角度延伸通过开口表面,所述开口处于相同的水平。
2.根据权利要求1所述的冲压探头,其特征在于:
提供了一个差压增加元件,混入所述流动中的外来物质冲击该差压增加元件并且从该差压增加元件上回弹。
3.根据权利要求1所述的冲压探头,其特征在于:
所述开口(4a、4b)被定向为使沉积在所述输送管(5a、5b)中的外来物质可以以遵循重力的方式离开所述输送管(5a、5b)。
4.根据权利要求1或2所述的冲压探头,其特征在于:
所述输送管(5a、5b)有一个圆锥形延伸的横截面并且该横截面在所述开口(4a、4b)的区域内比在通向所述压力测量传感器的所述输送管(5a、5b)的那端大。
5.根据前述权利要求1至3中任一权利要求所述的冲压探头,其特征在于:
所述差压增加元件(6)有一个分隔边缘。
6.根据权利要求1至3中任一权利要求所述的冲压探头,其特征在于:
所述差压增加元件(6)被安排在所述输送管(5a、5b)的轴之间,以便它突出到所述输送管的所述开口(4)外。
7.根据前面权利要求1至3中任一权利要求所述的冲压探头,其特征在于:
所述差压增加元件(6)有用于所述流动流体的一个路径延伸部。
8.一种包含如权利要求1至3中任一权利要求所述的冲压探头的冲压测量仪,其特征在于:
所述冲压探头被插入到一个闭合的管内,以便穿过所述开口表面的所述垂直轴相对于在测量过程中占优势的流动的所述方向(S)成一定角度延伸。
9.一种包含如权利要求1至3中任一权利要求所述的冲压探头的冲压测量仪,其特征在于:
所述冲压探头可插入到一个敞开的管内,以便所述探头位于流动介质中并且通过所述开口的所述开口表面的所述垂直轴以相对于在测量过程中占优势的流动的所述方向(S)成一定角度延伸。
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DE202007005695U1 (de) | 2007-04-18 | 2008-08-28 | systec Controls Meß- und Regeltechnik GmbH | Staudrucksonde |
DE112008003987A5 (de) * | 2008-06-18 | 2011-06-09 | systec Controls Meß- und Regeltechnik GmbH | Staudrucksonde mit Differenzdruckerhöher |
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- 2005-07-14 DE DE112005003700T patent/DE112005003700A5/de not_active Withdrawn
- 2005-07-14 EP EP05782809.7A patent/EP1904812B1/de active Active
- 2005-07-14 US US11/995,547 patent/US7798017B2/en active Active
- 2005-07-14 CN CN2005800510639A patent/CN101253394B/zh not_active Expired - Fee Related
- 2005-10-26 DE DE202005016862U patent/DE202005016862U1/de not_active Expired - Lifetime
-
2006
- 2006-07-13 DE DE112006002455T patent/DE112006002455A5/de active Pending
- 2006-07-13 CN CN2006800256666A patent/CN101258385B/zh active Active
- 2006-07-13 EP EP06775703A patent/EP1904813A2/de not_active Withdrawn
- 2006-07-13 US US11/995,548 patent/US8065925B2/en active Active
- 2006-07-13 WO PCT/DE2006/001219 patent/WO2007006297A2/de active Application Filing
-
2008
- 2008-11-14 HK HK08112488.6A patent/HK1120858A1/xx not_active IP Right Cessation
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2009
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Also Published As
Publication number | Publication date |
---|---|
US20090217752A1 (en) | 2009-09-03 |
CN101253394A (zh) | 2008-08-27 |
CN101258385B (zh) | 2013-02-27 |
US7798017B2 (en) | 2010-09-21 |
DE202005016862U1 (de) | 2006-11-16 |
WO2007006297A2 (de) | 2007-01-18 |
DE112005003700A5 (de) | 2008-06-19 |
DE112006002455A5 (de) | 2008-06-26 |
HK1123093A1 (en) | 2009-06-05 |
WO2007009409A1 (de) | 2007-01-25 |
US20090211372A1 (en) | 2009-08-27 |
WO2007006297A3 (de) | 2007-08-02 |
CN101258385A (zh) | 2008-09-03 |
EP1904812B1 (de) | 2014-12-03 |
EP1904813A2 (de) | 2008-04-02 |
US8065925B2 (en) | 2011-11-29 |
EP1904812A1 (de) | 2008-04-02 |
HK1120858A1 (en) | 2009-04-09 |
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