CN2655189Y - Double tube type average dynamic pressure measurer - Google Patents
Double tube type average dynamic pressure measurer Download PDFInfo
- Publication number
- CN2655189Y CN2655189Y CN 03249005 CN03249005U CN2655189Y CN 2655189 Y CN2655189 Y CN 2655189Y CN 03249005 CN03249005 CN 03249005 CN 03249005 U CN03249005 U CN 03249005U CN 2655189 Y CN2655189 Y CN 2655189Y
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- pressure measurement
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- static pressure
- total head
- dynamic pressure
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Abstract
The utility model relates to a two-pipe mean dynamic pressure measuring device used for measuring the mean dynamic pressure of the flowing liquid in a pipeline, comprising a static pressure measuring section and a total pressure measuring section. The static pressure measuring section is a single core bending pipe and is positioned in the pipeline, and comprises a first pipe section and a second pipe section which are connected with each other, the first pipe section is parallel to the flowing direction of the liquid, while the second pipe section is not parallel to the flowing direction of the liquid, at least one static pressure measuring hole is positioned on the pipe wall of the first pipe section, and a static pressure measuring head is arranged on one end of the second pipe section; the total pressure measuring section is a single core pipe, a plurality of total pressure measuring holes is arranged on the wall of the single core pipe, and a mean total pressure measuring head is arranged on one end of the total pressure measuring section and is communicated with the total pressure measuring holes. According to the difference value between the total pressure measured by the mean total pressure measuring head and the static pressure measured by the static pressure measuring head, the mean dynamic pressure is got. The distance from the static pressure measuring section to the total pressure section is equal to or less than the diameter of the pipeline; and the total pressure measuring holes of the total pressure section are arranged based on the equal area concentric circle principle.
Description
Technical field
The utility model relates to a kind of average dynamic pressure measurement device of double hose that utilizes the double hose measuring tube to measure dynamic pressure in the pipeline.
Background technology
When pipeline gas inside flows such as measurement gas exhaust piping or air-conditioning air-supply pipeline, can adopt two kinds of ways: first kind is direct measurement gas flow velocity; Second kind is after the gas dynamic pressure in measuring pipeline, is converted into gas flow rate again.Obtain after the flow velocity, calculate according to caliber again and obtain gas flow.Generally speaking, measure dynamic pressure than the measurement gas flow speed stability, and the numerical value of being tried to achieve is comparatively accurate, therefore adopts this method usually.
Traditional average dynamic pressure measurement device is to use the static pressure measurement mode, for tube wall is measured, obtain dynamic pressure by measuring the difference of total head with static pressure, as shown in Figure 1 be a traditional on average embodiment of dynamic pressure measurement device, be the configuration of the average dynamic pressure measurement device of a single core type.Among Fig. 1, the measuring tube radius is the dynamic pressure of flowing gas in the pipeline 50 of R, be with total head measuring tube 10 by the sealed tube wall that is fixed in pipeline 50 of the spiral of nut 30, wherein total head is measured tube wall total head measured hole 11,12, is used to measure the average total head of pipeline 50.In addition, static pressure measurement portion 200 is arranged at the tube wall of pipeline 50 equally, is used to measure the static pressure of pipeline 50.
In addition, the average total head measuring head 14 of total head measuring tube 10 and static pressure measurement portion 200 are connected to the high voltage input terminal 61 and low pressure input end 62 of pressure gauge 60 respectively by flexible pipe 41,42, make pressure gauge 60 can measure the total head of average total head measuring head 14 and the difference of static pressure, and try to achieve the average dynamic pressure of pipeline 50.Therefore, by above-mentioned configuration, can on pressure gauge 60, directly read the average dynamic pressure value of pipeline 50.
Generally speaking, the flow field of gas is not fully evenly to distribute in the pipeline, therefore must measure the force value of difference according to the caliber size, tries to achieve mean value, so that the dynamic pressure measurement result is comparatively accurate.Usually the caliber of pipeline is big more, and counting of required measurement is many more, for accurately trying to achieve the dynamic pressure value, and usually must be more than 4 o'clock.
For example, on same cross section when if desire is measured multiple spot and tried to achieve mean pressure, can decide suitable measuring position according to the concentrically ringed principle of homalographic, as shown in Figure 2, the area of a circle 201 all equates with annulus area 201-202,202-203,203-204 and 204-205, and five groups of total head measurement points 210,220,230,240 and 250 of symmetry are positioned at the concentrically ringed center of homalographic, have 10 total head measurement points.
Yet above-mentioned average dynamic pressure measurement device does not need extra static pressure tube, only needs to hole on the tube wall of desire measurement pipeline and the static pressure measurement head is installed.But implement under the situation of pipe and noiseless thing in smooth because the static pressure measurement of tube wall must be limited in, perhaps the mounted air-conditioning gas exhaust piping of part can't be merely in the first-class shortcoming of tube wall arranged outside static pressure measurement.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of can measure a plurality of measurement points simultaneously, and can be installed in the average dynamic pressure measurement device of double hose of measuring static pressure in the pipe.
The average dynamic pressure measurement device of double hose in the utility model is used for the average dynamic pressure of the fluid in the measuring tube, it includes static pressure measurement portion and total head measurement section, static pressure measurement portion is a single core bend pipe, be arranged at the inside of measuring pipeline, be used to measure the static pressure of pipeline, static pressure measurement portion comprises first section pipe portion and the second section pipe portion that is connected, first section pipe portion is parallel with the flow direction of fluid, the flow direction of second section pipe portion and fluid is not parallel, and wherein the tube wall of first section pipe portion of the static pressure measurement portion end that is provided with second section pipe portion of at least one static bole and static pressure measurement portion has a static pressure measurement head; The total head measurement section is a single-core tube, is used to measure the total head of pipeline, and the wall of total head measurement section has plural total head measured hole, and an end of total head measurement section has an average total head measuring head, leads to mutually with the total head measured hole.According to the difference of the measured static pressure of the total head of average total head measuring head and static pressure measurement head, try to achieve average dynamic pressure.The total head measured hole of total head measurement section is provided with according to homalographic concentric circles principle.
In addition, the average dynamic pressure measurement device of double hose also comprises a pressure gauge, and this pressure gauge is connected to the average total head measuring head and the static pressure measurement head of total head measurement section, with the difference of the total head of measuring average total head measuring head and static pressure and try to achieve average dynamic pressure.Again, the average dynamic pressure measurement device of above-mentioned double hose more can comprise plural flexible pipe, is used for pressure gauge is connected to respectively the average total head measuring head and the static pressure measurement head of total head measurement section.
Again, for the purpose of fixing, total head measurement section and static pressure measurement portion preferably have fixed part, and spiral locking part for example is for fixing to pipeline.
The average dynamic pressure measurement device of double hose in the utility model has following advantage:
The first, simultaneously measure a plurality of measurement points in the pipeline, and need not adjust can automatic continuous the measurement, therefore time saving and energy saving, can reduce the measurement cost.
The second,, therefore can and there be the gas exhaust piping of chaff interference to carry out operation to pipe in coarse because measurement mechanism makes the double hose design into.
Three, it is quick, easy to have the action implemented, and measures characteristics accurately.
Description of drawings
The specific embodiment of the utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is that the average dynamic pressure measurement device of traditional single core type is installed on the synoptic diagram of pipeline when carrying out flow measurement;
Fig. 2 is the synoptic diagram of multipoint mode total head measurement point;
Fig. 3 is the synoptic diagram of total head measuring tube in the utility model;
Fig. 4 is the synoptic diagram of static pressure tube in the utility model;
Fig. 5 is that the average dynamic pressure measurement device of double hose is installed on the synoptic diagram of pipeline when carrying out flow measurement in the utility model.
Embodiment
The average dynamic pressure that the average dynamic pressure measurement device of double hose in the utility model is used to measure pipeline.To shown in Figure 5, be an embodiment of the average dynamic pressure measurement device of the utility model double hose as Fig. 3.
As shown in Figure 3, average total head measuring tube 10 in the present embodiment is as the total head measurement section of the average dynamic pressure measurement device of double hose, it is a single-core tube, its material can be stainless steel, wall at total head measuring tube 10 is provided with plural total head measured hole 11 and 12 (being four total head measured holes in the present embodiment), is provided with according to the homalographic concentric circles principle shown in Fig. 2.Again, an end of total head measuring tube 10 is provided with an average total head measuring head 14, leads to mutually with each total head measured hole 11,12.In addition, this total head measuring tube 10 has the thread 13 as fixed part at the position near two ends.As shown in Figure 4, static pressure tube 20 is a single chip bending pipe as the static pressure measurement portion of the average dynamic pressure measurement device of double hose, and its material can be stainless steel.Again, static pressure tube 20 has two static boles 21,22 and an O-ring taper top 24 on the tube wall of first section pipe portion parallel with flow direction, this coniform top 24 is used to reduce the influence of stream field and has a static pressure measurement head 23 with the uneven second section pipe portion of flow direction, and this static pressure measurement head 23 leads to mutually with static bole 21,22.And static pressure measurement portion 20 is arranged in the measurement pipeline 50.
As shown in Figure 5, the average dynamic pressure measurement device of double hose in the present embodiment is used for the dynamic pressure of flowing gas that the measuring tube radius is the pipeline 50 of R, total head measuring tube 10 by the spiral sealed tube wall that be fixed in pipeline 50 of thread 13 with nut 30, is used to measure the average total head of pipeline 50.In addition, static pressure tube 20 is arranged to be measured in the pipeline 50, is used to measure the static pressure of pipeline 50.
In addition, the average total head measuring head 14 of total head measuring tube 10 and the static pressure measurement head 23 of static pressure tube 20 are connected to the high voltage input terminal 61 and low pressure input end 62 of pressure gauge 60 respectively by flexible pipe 41,42, make pressure gauge 60 can measure the total head of average total head measuring head 14 and the difference of static pressure, and try to achieve the average dynamic pressure of pipeline 50.Therefore, can on pressure gauge 60, directly read the average dynamic pressure value of pipeline 50 by the utility model.
In this mandatory declaration, the position of relevant static pressure tube 20 because pipeline static pressure intensity of variation is less, therefore is not limited to any position of pipeline; But for the purpose of reducing error, preferably the position with static pressure tube 20 is arranged on respect to before the total head measuring tube 10, and wherein the distance between static pressure tube 20 and the total head measuring tube 10 is less than or equal to the pipe radius R.As shown in Figure 5, desire is measured the dynamic pressure of flowing gas in the pipeline 50, and its installation direction should be judged according to pipeline inner fluid direction, promptly total head measured hole 11 and 12 position answer object gas flow to.
Measurement mechanism in the utility model is owing to adopt the double hose design, therefore can and have the gas exhaust piping of chaff interference to carry out operation to pipe in coarse, can measure a plurality of measurement points in the pipeline simultaneously, and need not adjust can automatic continuous the measurement, therefore time saving and energy saving, reduce and measure cost.
In addition; though more than the preferred embodiment in the utility model is described; but can not be as protection domain of the present utility model; promptly should be understood that to those skilled in the art; do not breaking away from variation and the modification that to make equivalence under the design spirit of the present utility model to it; therefore, every not breaking away from the equivalence variation of having done under the design spirit of the present utility model and modification, all should think to fall into protection domain of the present utility model.
Claims (13)
1. average dynamic pressure measurement device of double hose for try to achieve the measurement mechanism of average dynamic pressure according to the difference of total head and static pressure, is characterized in that: include:
One is used to measure the static pressure measurement portion of static pressure in the pipeline, and this static pressure measurement portion is a single core bend pipe, and is arranged at the inside of described pipeline; And
One is used to measure the total head measurement section of total head in the pipeline, and this total head measurement section is a single-core tube, and is arranged at the inside of described pipeline.
2. according to the average dynamic pressure measurement device of the double hose described in the claim 1, it is characterized in that: described static pressure measurement portion comprises first section pipe portion and the second section pipe portion that is connected, wherein first section pipe portion is parallel with the flow direction of fluid, and the flow direction of second section pipe portion and fluid is not parallel.
3. according to the average dynamic pressure measurement device of the double hose described in the claim 2, it is characterized in that: the tube wall of first section pipe portion of described static pressure measurement portion is provided with at least one static bole that is used to measure the pipeline static pressure.
4. according to the average dynamic pressure measurement device of the double hose described in the claim 2, it is characterized in that: first section pipe portion of described static pressure measurement portion has an O-ring taper top.
5. according to the average dynamic pressure measurement device of the double hose described in the claim 2, it is characterized in that: an end of second section pipe portion of described static pressure measurement portion has a static pressure measurement head.
6. according to the average dynamic pressure measurement device of the double hose described in the claim 1, it is characterized in that: the wall of described total head measurement section has plural total head measured hole, one end of this total head measurement section has an average total head measuring head, and this average total head measuring head and described total head measured hole lead to mutually.
7. according to the average dynamic pressure measurement device of the double hose described in the claim 6, it is characterized in that: the total head measured hole of described total head measurement section is provided with according to the homalographic concentric circles principle of pipeline.
8. according to the average dynamic pressure measurement device of the double hose described in the claim 1, it is characterized in that: the distance of described static pressure measurement portion and pressure measurement section is less than or equal to the radius of pipeline.
9. according to the average dynamic pressure measurement device of the double hose described in the claim 1, it is characterized in that: it more comprises a pressure gauge, and this pressure gauge is connected to total head measurement section and static pressure measurement portion.
10. according to the average dynamic pressure measurement device of the double hose described in the claim 9, it is characterized in that: it comprises that more plural number is used for pressure gauge is connected to respectively the flexible pipe of static pressure measurement head.
11. according to the average dynamic pressure measurement device of the double hose described in the claim 9, it is characterized in that: it comprises that more plural number is used for pressure gauge is connected to respectively the flexible pipe of total head measuring head.
12. according to the average dynamic pressure measurement device of the double hose described in the claim 1, it is characterized in that: described total head measurement section and static pressure measurement portion have more the fixed part that is used for total head measurement section and static pressure measurement portion are fixed in pipeline.
13. according to the average dynamic pressure measurement device of the double hose described in the claim 12, it is characterized in that: described fixed part is the spiral locking part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03249005 CN2655189Y (en) | 2003-09-23 | 2003-09-23 | Double tube type average dynamic pressure measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03249005 CN2655189Y (en) | 2003-09-23 | 2003-09-23 | Double tube type average dynamic pressure measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2655189Y true CN2655189Y (en) | 2004-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03249005 Expired - Fee Related CN2655189Y (en) | 2003-09-23 | 2003-09-23 | Double tube type average dynamic pressure measurer |
Country Status (1)
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| CN (1) | CN2655189Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410856A (en) * | 2011-11-30 | 2012-04-11 | 张益民 | Gas flow rate and flow measurement instrument and measurement method |
| CN103308106A (en) * | 2013-06-28 | 2013-09-18 | 公安部天津消防研究所 | Mass flowmeter for high-pressure inert gas extinguishing agent |
| CN105699688A (en) * | 2016-01-22 | 2016-06-22 | 唐明良 | Device and method for measuring flow velocity and flow of fluid |
| CN107830970A (en) * | 2017-10-31 | 2018-03-23 | 江西清华泰豪三波电机有限公司 | Integrated dynamic pressure pressure valve and dynamic pressure detecting system |
| CN108237291A (en) * | 2016-12-26 | 2018-07-03 | 上海朗仕电子设备有限公司 | A kind of real-time exhausting monitoring device of hot air type reflow soldering |
-
2003
- 2003-09-23 CN CN 03249005 patent/CN2655189Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410856A (en) * | 2011-11-30 | 2012-04-11 | 张益民 | Gas flow rate and flow measurement instrument and measurement method |
| CN103308106A (en) * | 2013-06-28 | 2013-09-18 | 公安部天津消防研究所 | Mass flowmeter for high-pressure inert gas extinguishing agent |
| CN103308106B (en) * | 2013-06-28 | 2016-01-13 | 公安部天津消防研究所 | High-pressure inert gas fire extinguishing agent mass flowmeter |
| CN105699688A (en) * | 2016-01-22 | 2016-06-22 | 唐明良 | Device and method for measuring flow velocity and flow of fluid |
| CN105699688B (en) * | 2016-01-22 | 2019-01-22 | 唐明良 | Device and method for measuring flow velocity and flow of fluid |
| CN108237291A (en) * | 2016-12-26 | 2018-07-03 | 上海朗仕电子设备有限公司 | A kind of real-time exhausting monitoring device of hot air type reflow soldering |
| CN107830970A (en) * | 2017-10-31 | 2018-03-23 | 江西清华泰豪三波电机有限公司 | Integrated dynamic pressure pressure valve and dynamic pressure detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041110 Termination date: 20120923 |