CN210014810U - Plug-in air quantity measuring device - Google Patents
Plug-in air quantity measuring device Download PDFInfo
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- CN210014810U CN210014810U CN201920615774.3U CN201920615774U CN210014810U CN 210014810 U CN210014810 U CN 210014810U CN 201920615774 U CN201920615774 U CN 201920615774U CN 210014810 U CN210014810 U CN 210014810U
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Abstract
The utility model relates to the technical field of fluid measurement, in particular to an inserted air quantity measuring device, which comprises probes, two measuring tubes, two pressure-leading tubes, a stop valve and a differential pressure transmitter, wherein the probes are connected with the measuring tubes, the two measuring tubes are arranged at the top ends of the probes side by side, the side parts of the two measuring tubes are respectively communicated with one pressure-leading tube, the stop valve is arranged on the pressure-leading tubes, and the differential pressure transmitter is also arranged between the two pressure-leading tubes and above the stop valve; the probe is V-shaped with a windward pressure measuring pipe and a leeward pressure measuring pipe arranged on two sides, the air volume device is also provided with a cover plate flange, and the cover plate flange is detachably connected with an installation base on a pipeline to be tested. The device of the utility model is simple in structure, simple to operate, have measurement accuracy height, prevent that stifled performance is strong, wear-resisting, corrosion-resistant and to require characteristics such as low to await measuring pipeline straight tube section.
Description
Technical Field
The utility model relates to a technical field is measured to the fluid, concretely relates to bayonet amount of wind measuring device.
Background
In the field of fluid measurement, especially air volume measurement, an orifice plate flowmeter is often used, and the principle of the orifice plate flowmeter is that a high-range-ratio differential pressure flow device formed by matching a standard orifice plate with a multi-parameter differential pressure transmitter (or a differential pressure transmitter, a temperature transmitter and a pressure transmitter) can measure the flow of gas, steam, liquid and water, and is widely applied to process control and measurement in the fields of petroleum, chemical engineering, metallurgy, electric power, heat supply, water supply and the like.
However, orifice plate flow meters have the following major disadvantages:
1. the orifice plate flowmeter requires a longer straight pipe section for measurement, which is contradictory to the space saving of a factory;
2. the precision of the orifice plate flowmeter is mainly ensured by the acute angle line of the inner hole of the orifice plate, so that the sensor is sensitive to corrosion, abrasion, scaling and dirt, and the precision is difficult to ensure after long-term use;
3. the orifice plate measurement and installation are complex, and the orifice plate flowmeter must be installed in the middle of the pipeline, so the pipe must be cut and then connected by a flange, thus the problems of running, overflowing, dripping and leakage are easily caused, and the maintenance workload is greatly increased.
Accordingly, the present inventors have devised an apparatus that solves the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior art, the utility model provides a bayonet amount of wind measuring device, it has simple structure, simple to operate, prevents characteristics such as stifled performance is strong.
The to-be-solved technical problem of the utility model is realized through following technical scheme:
the pressure measuring device comprises probes, measuring pipes, two pressure guiding pipes, stop valves and a differential pressure transmitter, wherein the probes are connected with the measuring pipes, the two measuring pipes are arranged at the top ends of the probes side by side, the side parts of the two measuring pipes are respectively communicated with the pressure guiding pipes, the stop valves are arranged on the pressure guiding pipes, and the differential pressure transmitter is arranged between the two pressure guiding pipes and above the stop valves;
the left side and the right side of the probe are provided with slopes and form a V-shaped shape, the left side and the right side in the probe are provided with a windward pressure measuring pipe and a leeward pressure measuring pipe, the windward pressure measuring pipe and the leeward pressure measuring pipe penetrate through the probe, the top ends of the windward pressure measuring pipe and the leeward pressure measuring pipe are respectively communicated with the bottom ends of the two measuring pipes, and the bottom ends of the windward pressure measuring pipe and the leeward pressure measuring pipe respectively form an oval opening with the slope surface of the probe.
Furthermore, the air quantity measuring device also comprises a cover plate flange which is fixed between the measuring tube and the probe.
Furthermore, the measuring tube is connected with the cover plate flange through welding.
Further, the included angle between the slope surface of the probe and the horizontal plane ranges from 45 degrees to 75 degrees.
Furthermore, an arc chamfer is arranged on the edge of the probe.
Furthermore, a detachable cap-shaped nut is arranged at the top end of the measuring tube
Furthermore, the air quantity measuring device is installed on the pipeline to be measured, an installation base is arranged on the pipeline to be measured, and the air quantity measuring device is detachably connected with the installation base through a cover plate flange.
Furthermore, the probe is made of a high-strength wear-resistant composite material.
Furthermore, the pipe inner diameter of the measuring pipe is respectively larger than the pipe inner diameters of the windward pressure measuring pipe and the leeward pressure measuring pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to a bayonet amount of wind measuring device through setting up windward pressure-measuring pipe and leeward pressure-measuring pipe in probe both sides, thereby obtains the wind speed through both pressure differentials, compares with orifice plate flowmeter: the device has low requirements on the measured pipeline straight pipe section, and generally only needs the length of the straight pipe section not less than the equivalent diameter of the pipeline; the device is convenient to install, the mounting base is fixed by opening the upper end of the pipeline to be tested after the mounting position is determined, and then the device is inserted and then fixed with the mounting base.
2. The utility model is also provided with measuring tubes which are communicated with the windward pressure measuring tube and the leeward pressure measuring tube, the tube diameters of the measuring tubes are respectively larger than those of the windward pressure measuring tube and the leeward pressure measuring tube, and the side parts of the two measuring tubes are respectively communicated with a pressure guiding tube; the large-caliber straight-through measuring tube has a strong self-cleaning effect under the impact of airflow in the tube, and the bending pressure-drawing tube is led out from the side part of the vertical straight-through measuring tube, so that the secondary ash settling effect can be achieved.
3. The utility model discloses the device is equipped with the circular arc chamfer at the edge of probe, reduces fluidic streaming influence to improve measurement accuracy.
4. The utility model discloses the device is installing detachable lid shape nut at the top of surveying buret, through opening lid shape nut, can be to surveying buret and windward pressure-measuring pipe and the inside clearance that carries on of leeward pressure-measuring pipe.
5. The utility model discloses the probe of device adopts the wear-resisting combined material of high strength, has extremely strong anti dust impact performance, and wear-resisting life is 8 times of ordinary stainless steel, can use for a long time, avoids often maintaining.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention in use;
FIG. 2 is a schematic view of the three-dimensional structure of the device of the present invention;
FIG. 3 is a perspective view of the device of the present invention in combination with a mounting base;
FIG. 4 is a left side view of the device of the present invention in combination with a mounting base;
fig. 5 is a bottom view of the device of the present invention in combination with a mounting base;
FIG. 6 is a sectional view taken along line A-A of the device of the present invention in combination with a mounting base;
FIG. 7 is a schematic perspective view of the probe of the device of the present invention;
FIG. 8 is a front view of the probe of the device of the present invention;
fig. 9 is a schematic top and left view of the mounting base.
In the figure: 1. a probe; 2. installing a base; 3. a cover plate flange; 4. a bolt; 5. a measurement tube; 6. a pressure guiding pipe; 7. a stop valve; 8. a differential pressure transmitter; 9. a pipeline to be tested; 11. a windward piezometer tube; 12. chamfering with an arc; 13. a lee piezometer tube; 14. an included angle; 21. 31, an internal threaded hole; 22. a probe aperture; (ii) a 51. A cap nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It is to be understood that such description is merely illustrative and not restrictive of the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1: as shown in fig. 1-9, the utility model provides an inserted air volume measuring device, including probe 1, survey buret 5, draw and press pipe 6, stop valve 7 and differential pressure transmitter 8, probe 1 links to each other with surveying buret 5, and sets up side by side at the top of probe 1, and preferred two survey burets 5 set up side by side perpendicularly at the top of probe 1, and the lateral part of two survey burets 5 communicates respectively has a pressure drawing pipe 6 of taking the camber, and preferred said pressure drawing pipe 6 is located survey buret 5 same side, installs stop valve 7 on the pressure drawing pipe 6, and between two pressure drawing pipes 6, lie in the top of stop valve 7 and still install differential pressure transmitter 8; slopes are arranged on the left side and the right side of the probe 1 and form a V shape, the size of the slopes is set according to the property of the measured fluid, and the included angle between the slope surface of the probe 1 and the horizontal plane is generally 45-75 degrees; the left side and the right side in the probe 1 are provided with a windward pressure measuring pipe 11 and a leeward pressure measuring pipe 13, the preferred windward pressure measuring pipe 11 and leeward pressure measuring pipe 13 are symmetrically designed along the vertical direction, the windward pressure measuring pipe 11 and the leeward pressure measuring pipe 13 penetrate through the probe 1, the top ends of the windward pressure measuring pipe 11 and the leeward pressure measuring pipe 13 are respectively communicated with the two measuring pipes 5, the bottom ends of the top ends of the windward pressure measuring pipe 11 and the leeward pressure measuring pipe 13 are respectively formed into an oval opening on the gradient surface of the probe 1, the axis of the preferred two measuring pipes 5 is respectively superposed with the axis of the windward pressure measuring pipe 11 and the axis of the leeward pressure measuring pipe 13, the pipe diameter of the further measuring pipe 5 is larger than the pipe diameter of the windward pressure measuring pipe 11 and the pipe diameter of the leeward pressure measuring pipe 13, so that the measuring pipes 5 adopt a large-caliber straight-through design, and have.
In addition, cap nuts 51 are respectively mounted at the top ends of the two measuring tubes 5, the cap nuts 51 are connected with the measuring tubes 5 through threads, and when dust exists in the measuring tubes 5, the windward pressure measuring tube 11 and/or the leeward pressure measuring tube 13, the cap nuts 51 can be opened through rotation to clean the insides of the measuring tubes; as shown in fig. 2, a pressure pipe 6 with a curvature is respectively led out from the side portions of the two measuring pipes 5, and the pressure pipe functions as a secondary ash settling function under the impact of the air flow in the pipes, thereby further preventing blockage.
The utility model also comprises a cover plate flange 3, the cover plate flange 3 is fixed between the measuring tube 5 and the probe 1, the measuring tube 5 is connected with the cover plate flange 3 by welding, and the welding position is that the central axis of the pipeline 9 to be measured coincides with the center of the oval opening of the probe 1; the pipeline to be tested is provided with an installation base 2, the installation base 2 is provided with a probe hole 22 through which a probe 1 can pass and an internal thread hole 21 used for being fixed with a cover plate flange 3, the corresponding cover plate flange 3 is also provided with a corresponding internal thread hole 31, the number of the internal thread holes 21 and 31 is uniformly arranged according to the requirement, for example, six groups of internal threads are uniformly arranged on the cover plate flange 3 and the installation base 2; after air volume measuring device inserts pipeline 9 that awaits measuring, can dismantle through hex bolts 4 with apron flange 3 and installation base 2 and be connected, in order to make measuring result more accurate, can be in pipeline 9 that awaits measuring evenly distributed many places air volume measuring device, ask its average value at last, this device simple to operate, measurement accuracy is high, the requirement to the alignment pipeline section is low.
Because the interior flow field of the measured pipeline is complicated, in order to guarantee the measuring accuracy and improve the measuring precision, the probe 1 of the device has the characteristics of corrosion resistance, wear resistance and the like, the material of the probe 1 in the device is a high-strength wear-resistant composite material, for example, high manganese steel can be selected for manufacturing, the wear-resistant service life of the probe is 8 times that of common stainless steel, and in addition, in order to reduce the influence of the streaming on the measuring result of the device, an arc chamfer 12 is arranged on the edge of the probe 1 to reduce the streaming and further improve the measuring precision.
The measurement principle is as follows: the device is based on the backrest measurement principle, the air quantity measuring device is arranged on a pipeline, a probe of the air quantity measuring device is inserted into the pipeline, when airflow flows in the pipeline, the windward side is impacted by the airflow, the kinetic energy of the airflow is converted into pressure energy at the position, the pressure in the windward pressure measuring pipe is higher and is called as 'full pressure', the leeward side is not impacted by the airflow, the pressure in the pipeline is negative pressure in the air pipe and is called as 'negative pressure', the difference between the full pressure and the negative pressure is called as differential pressure, the magnitude of the differential pressure is related to the air speed (quantity) in the pipeline, and the larger the air speed (quantity) is, the larger; the wind speed (quantity) is small, and the differential pressure is also small, so that the wind speed in the pipe can be accurately measured only by measuring the magnitude of the differential pressure and finding out the corresponding relation between the differential pressure and the wind speed (quantity).
The installation mode is as follows: firstly, determining an optimal installation position according to the actual condition of a pipeline to be measured; after the installation position is determined, one or more square holes are formed along the axial direction of the pipeline to be tested according to requirements, an installation base is fixed (welded or glued) on the pipeline to be tested, then a probe of the device is inserted into the pipe, when the center of an oval port formed by the probe and a windward pressure measuring pipe is superposed with the axial line of the pipeline to be tested, a cover plate flange and the measuring pipe are welded, the symmetrical axial line of the cover plate flange is parallel to the axial line of the pipeline to be tested during welding, and the windward pressure measuring pipe is ensured to be opposite to the flow velocity direction; and finally, the cover plate flange is detachably connected with the mounting base through bolts, so that the sealing performance of the mounting base is ensured. When the device is installed on a vertical pipeline, the device can be inserted and installed at any horizontal angle of the pipeline; when the device is installed on a horizontal pipeline, the device is preferably inserted and installed from the vertical direction of the pipeline; after the installation is finished and before the use, whether the sealing of each joint is reliable or not is checked.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (9)
1. The utility model provides an bayonet amount of wind measuring device which characterized in that: the pressure measuring device comprises probes (1), measuring pipes (5), two pressure-inducing pipes (6), stop valves (7) and a differential pressure transmitter (8), wherein the probes (1) are connected with the measuring pipes (5), the two measuring pipes (5) are arranged on the top ends of the probes (1) side by side, the side parts of the two measuring pipes (5) are respectively communicated with one pressure-inducing pipe (6), the stop valves (7) are installed on the pressure-inducing pipes (6), and the differential pressure transmitter (8) is also installed between the two pressure-inducing pipes (6) and above the stop valves (7);
be provided with the slope on the left and right sides of probe (1) and constitute the V-arrangement shape, the left and right sides is provided with windward pressure-measuring pipe (11) and leeward pressure-measuring pipe (13) in probe (1), windward pressure-measuring pipe (11) and leeward pressure-measuring pipe (13) run through probe (1), the top of windward pressure-measuring pipe (11) and leeward pressure-measuring pipe (13) communicates with the bottom of two survey burets (5) respectively, the bottom of windward pressure-measuring pipe (11) and leeward pressure-measuring pipe (13) forms oval mouthful with the slope face of probe (1) respectively.
2. The plug-in air volume measuring device according to claim 1, characterized in that: the air volume measuring device further comprises a cover plate flange (3), and the cover plate flange (3) is fixed between the measuring pipe (5) and the probe (1).
3. The plug-in air volume measuring device according to claim 2, characterized in that: the measuring pipe (5) is connected with the cover plate flange (3) through welding.
4. The plug-in air volume measuring device according to claim 1, characterized in that: the included angle (14) range between the slope surface of the probe (1) and the horizontal plane is 45 degrees to 75 degrees.
5. The plug-in air volume measuring device according to claim 1, characterized in that: and an arc chamfer (12) is arranged on the edge of the probe (1).
6. The plug-in air volume measuring device according to claim 1, characterized in that: a detachable cap nut (51) is mounted on the top end of the measuring tube (5).
7. The plug-in air volume measuring device according to claim 2, characterized in that: the air quantity measuring device is installed on a pipeline (9) to be measured, an installation base (2) is arranged on the pipeline (9) to be measured, and the air quantity measuring device is detachably connected with the installation base (2) through a cover plate flange (3).
8. The plug-in air volume measuring device according to claim 1, characterized in that: the probe (1) is made of a high-strength wear-resistant composite material.
9. The plug-in air volume measuring device according to claim 1, characterized in that: the pipe inner diameter of the measuring pipe (5) is respectively larger than the pipe inner diameters of the windward pressure measuring pipe (11) and the leeward pressure measuring pipe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920615774.3U CN210014810U (en) | 2019-04-30 | 2019-04-30 | Plug-in air quantity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920615774.3U CN210014810U (en) | 2019-04-30 | 2019-04-30 | Plug-in air quantity measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN210014810U true CN210014810U (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920615774.3U Active CN210014810U (en) | 2019-04-30 | 2019-04-30 | Plug-in air quantity measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442807A (en) * | 2020-05-08 | 2020-07-24 | 上海朝辉压力仪器有限公司 | High-sensitivity multi-parameter flow meter based on ZigBee network |
| CN112525273A (en) * | 2020-10-23 | 2021-03-19 | 江苏淮海自控设备有限公司 | Novel large-caliber high-precision flow sensor |
| CN113091836A (en) * | 2021-03-04 | 2021-07-09 | 彩虹（合肥）液晶玻璃有限公司 | Cooling blowing flow monitoring, adjusting and installing mechanism for glass substrate forming |
-
2019
- 2019-04-30 CN CN201920615774.3U patent/CN210014810U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442807A (en) * | 2020-05-08 | 2020-07-24 | 上海朝辉压力仪器有限公司 | High-sensitivity multi-parameter flow meter based on ZigBee network |
| CN112525273A (en) * | 2020-10-23 | 2021-03-19 | 江苏淮海自控设备有限公司 | Novel large-caliber high-precision flow sensor |
| CN113091836A (en) * | 2021-03-04 | 2021-07-09 | 彩虹（合肥）液晶玻璃有限公司 | Cooling blowing flow monitoring, adjusting and installing mechanism for glass substrate forming |
| CN113091836B (en) * | 2021-03-04 | 2022-08-30 | 彩虹（合肥）液晶玻璃有限公司 | Cooling blowing flow monitoring and adjusting installation mechanism for glass substrate forming |
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