CN204085583U - Portable orifice-plate measuring instrument - Google Patents
Portable orifice-plate measuring instrument Download PDFInfo
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- CN204085583U CN204085583U CN201420433307.6U CN201420433307U CN204085583U CN 204085583 U CN204085583 U CN 204085583U CN 201420433307 U CN201420433307 U CN 201420433307U CN 204085583 U CN204085583 U CN 204085583U
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- measuring instrument
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- orifice
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Abstract
A kind of portable orifice-plate measuring instrument, comprise fore shell, back cover, circuit board, high-pressure mouth, low pressure port, wherein the rear portion of front casing is uniformly distributed button row, forms nine grids button, the front portion of fore shell is provided with liquid crystal display window, the periphery of back cover is evenly provided with four screw holes; Fore shell is combined fixing as a whole with back cover by screw hole screw, high-pressure mouth, low pressure port are disposed in parallel on the front end face of fore shell, and two ports that high-pressure mouth, low pressure port are positioned at measuring instrument inside are connected with two inlet ends of differential pressure pickup through snorkel respectively; This product portable orifice-plate measuring instrument adopts pressure reduction before and after direct metering system measuring diaphragm, and applicability is strong, and volume is little, is easy to carry, and measuring process is simple, can be carried into different measuring points measure by survey crew.
Description
Technical field
The utility model relates to measuring apparatus, particularly relates to a kind of device measuring gas flow in gas drainage pipe.
Background technology
In control of coalmine gas, essential to the monitoring of data every in gas drainage pipe, pipe temperature, pipeline pressure, pipeline flow etc. data are the basic basis in governance process.Flow is a kind of very important measurement parameter on colliery, and for many years, colliery have employed a variety of method for the measurement of gas flow, but all very undesirable, and conventional has three kinds of schemes:
Scheme one: widely used orifice flowmeter on colliery, colliery is still continued to use traditional U-shaped pipe when concrete use and is measured its differential pressure, again in conjunction with pressure and temperature in pipeline, outflow could be obtained by orifice plate formulae discovery, therefore use very loaded down with trivial details and inconvenient, have impact on colliery and accurately real-time monitoring is carried out for pipeline flow.
Scheme two: with two pipe pressure sensors with the use of pressure differential needed for measuring flow, cost is high, indirect mode is measured, be exaggerated the systematic error of original pipeline pressure measuring value, cause result inaccurate, after reading force value, still need just can obtain flow value through orifice plate formulae discovery, use still loaded down with trivial details.
Scheme three: existing complete orifice flowmeter, and expensive, every platform orifice flowmeter is only applicable to a kind of caliber, is not suitable for the colliery that production capacity is little, measuring point is many and uses.
Therefore, the novel orifice plate measurement mechanism that a kind of structure is simple, easy to operate, cost is low is badly in need of.
Utility model content
The purpose of this utility model is to provide a kind of portable orifice-plate measuring instrument for solving the problems of the technologies described above.
The structure composition of the utility model portable orifice-plate measuring instrument comprises, fore shell, back cover, circuit board, high-pressure mouth, low pressure port, wherein the rear portion of front casing is uniformly distributed button row, form nine grids button, the front portion of fore shell is provided with liquid crystal display window, the periphery of back cover is evenly provided with four screw holes;
Fore shell is combined fixing as a whole with back cover by screw hole screw, high-pressure mouth, low pressure port are disposed in parallel on the front end face of fore shell, and two ports that high-pressure mouth, low pressure port are positioned at measuring instrument inside are connected with two inlet ends of differential pressure pickup through snorkel respectively.
Described portable orifice-plate measuring instrument, also comprise three-way interface, absolute pressure sensor, the first interface of three-way interface connects high-pressure mouth, in second interface of three-way interface, absolute pressure sensor is installed, 3rd interface of three-way interface is connected with an inlet end of differential pressure pickup, and another inlet end of differential pressure pickup is connected with low pressure port.
Described portable orifice-plate measuring instrument, also comprises temperature sensor, and temperature sensor is positioned at the back side of circuit board.
Described fore shell, back cover are the narrow rectangular parallelepiped in wide centre, two ends.
This product adopts pressure reduction before and after direct metering system measuring diaphragm, and error is little, carries temperature, pressure compensation, and the orifice plate equipment that can be set using different orifice constant is measured, and applicability is strong.Volume is little, is easy to carry, and measuring process is simple, can be carried into different measuring points measure by survey crew.
Below in conjunction with accompanying drawing, portable orifice-plate measuring instrument of the present utility model is described further.
Accompanying drawing explanation
Fig. 1 is portable orifice-plate measuring instrument front plan view;
Fig. 2 is board side view;
Fig. 3 is portable orifice-plate measuring instrument inverse plan view;
Fig. 4 is and portable orifice-plate measuring instrument matching used orifice plate mounting structure schematic diagram.
Embodiment
As Fig. 1, Fig. 2, shown in Fig. 3, portable orifice-plate measuring instrument of the present utility model comprises fore shell 1, back cover 5, circuit board 7, high-pressure mouth 4, low pressure port 3, wherein fore shell 1, back cover 5 is respectively the narrow rectangular recess in wide centre, two ends, hand-held after being convenient to coordinate installation, the rear portion of fore shell 1 is uniformly distributed button row, form nine grids button 2, the front portion of fore shell 1 is provided with liquid crystal display window 6-1, the periphery of back cover 5 is evenly provided with four screw holes 10, the front and rear part of back cover 5 is disposed with two nameplates 11, fore shell 1 is combined fixing as a whole with back cover 5 by screw hole 10 with screw, the front end face of fore shell 1 is set side by side with high-pressure mouth 4, low pressure port 3, the rear end face of fore shell 1 is provided with USB interface 9.
This section of following structural relation is the inner structure of portable orifice-plate measuring instrument, portable orifice-plate measuring instrument inside is provided with three-way interface, the first interface of three-way interface connects high-pressure mouth 4, in second interface of three-way interface, absolute pressure sensor is installed, 3rd interface of three-way interface connects and is connected with an inlet end of differential pressure pickup through snorkel, another inlet end of differential pressure pickup is connected with low pressure port 3 through snorkel, temperature sensor is positioned at the main circuit board back side, and absolute pressure sensor, differential pressure pickup, temperature sensor are electrically connected with circuit board 7 respectively.
Position distribution corresponding with nine grids button 2 on the surface that circuit board 7 is corresponding to fore shell 1 has nine corresponding buttons, and the position corresponding with liquid crystal display window 6-1 is provided with LCD liquid crystal display 6; The lower end on the surface that circuit board 7 is corresponding with back cover 5 is provided with power supply 8.
LCD liquid crystal display 6 is for the various parameter values of display measurement, nine grids button 2 is for carrying out optimum configurations to portable orifice-plate measuring instrument, USB interface 9 is for use of charging, absolute pressure sensor is for measuring the force value of gas in tested pipeline, the pressure difference value that differential pressure pickup is used for measuring diaphragm both sides is used for for calculating the flow value in tested pipeline, and temperature sensor is used for measures ambient temperature.
As shown in Figure 4, comprise first interface 12, second interface 13, first valve 14, second valve 15, orifice plate 16, orifice plate 16 is installed in the duct by two flange arrangement parts, and first interface 12 is drawn on the both sides of orifice plate 16, second interface 13, in figure, the direction of arrow illustrates gas flow, namely the left surface of orifice plate 16 is windward side, the right flank of orifice plate 16 is lee face, first interface 12 is drawn by orifice plate windward side, second interface 13 is drawn by orifice plate lee face, first interface 12 is drawn on pipeline and is provided with the first valve 14, second interface 13 is drawn on pipeline and is provided with the second valve 15,
For in pipeline, other needs the place of measuring flow only to need structure shown in installation diagram 3 in the manner described above.
Only the high-pressure mouth 4 of portable orifice-plate measuring instrument need be connected first interface 12 in actual measurement, low pressure port 3 connects the second interface 13, open the first valve 14, second valve 15, then open measuring instrument can measure, differential pressure pickup records the pressure difference value of orifice plate 16 both sides for calculated flow rate value, pressure transducer records the force value of orifice plate windward side and is transferred to circuit board 7, temperature sensor records environment temperature and flows to circuit board 7, is finally shown on LCD liquid crystal display by the signal value that each sensor collection comes.
The utility model only needs needing the structure shown in the pipeline place installation diagram 3 of measuring flow in the application, be equipped with a portable orifice-plate measuring instrument terminal, eliminate each measurement point in the past and be equipped with the waste of the cost that a measuring instrument terminal causes, this is outside equipped with absolute pressure sensor and temperature sensor carries out pressure and temp compensation, reduce the impact of external factor on measurement result, improve the accuracy of measurement.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (4)
1. a portable orifice-plate measuring instrument, it is characterized in that, the structure composition of described portable orifice-plate measuring instrument comprises, fore shell (1), back cover (5), circuit board (7), high-pressure mouth (4), low pressure port (3), wherein the rear portion of front casing (1) is uniformly distributed button row, form nine grids button (2), the front portion of fore shell (1) is provided with liquid crystal display window (6-1), the periphery of back cover (5) is evenly provided with four screw holes (10);
Fore shell (1) is combined fixing as a whole with back cover (5) by screw hole (10) with screw, high-pressure mouth (4), low pressure port (3) are disposed in parallel on the front end face of fore shell (1), and two ports that high-pressure mouth (4), low pressure port (3) are positioned at measuring instrument inside are connected with two inlet ends of differential pressure pickup through snorkel respectively.
2. portable orifice-plate measuring instrument according to claim 1, it is characterized in that, also comprise three-way interface, absolute pressure sensor, the first interface of three-way interface connects high-pressure mouth (4), in second interface of three-way interface, absolute pressure sensor is installed, 3rd interface of three-way interface is connected with an inlet end of differential pressure pickup, and another inlet end of differential pressure pickup is connected with low pressure port (3).
3. portable orifice-plate measuring instrument according to claim 2, is characterized in that, also comprise temperature sensor, and temperature sensor is positioned at the back side of circuit board (7).
4. portable orifice-plate measuring instrument according to claim 3, is characterized in that, described fore shell (1), back cover (5) are the narrow rectangular recess in wide centre, two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433307.6U CN204085583U (en) | 2014-08-01 | 2014-08-01 | Portable orifice-plate measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420433307.6U CN204085583U (en) | 2014-08-01 | 2014-08-01 | Portable orifice-plate measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204085583U true CN204085583U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420433307.6U Active CN204085583U (en) | 2014-08-01 | 2014-08-01 | Portable orifice-plate measuring instrument |
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| Country | Link |
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| CN (1) | CN204085583U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698879A (en) * | 2016-04-08 | 2016-06-22 | 大唐彬长发电有限责任公司 | Multi-measuring point flow measurement device |
| CN106197531A (en) * | 2015-04-11 | 2016-12-07 | 金华市威科工贸有限公司 | A kind of Multifunctional coolant measures digital display meter device |
-
2014
- 2014-08-01 CN CN201420433307.6U patent/CN204085583U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197531A (en) * | 2015-04-11 | 2016-12-07 | 金华市威科工贸有限公司 | A kind of Multifunctional coolant measures digital display meter device |
| CN105698879A (en) * | 2016-04-08 | 2016-06-22 | 大唐彬长发电有限责任公司 | Multi-measuring point flow measurement device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |