CN203745018U - Micro ultrasonic gas meter - Google Patents
Micro ultrasonic gas meter Download PDFInfo
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- CN203745018U CN203745018U CN201420139972.4U CN201420139972U CN203745018U CN 203745018 U CN203745018 U CN 203745018U CN 201420139972 U CN201420139972 U CN 201420139972U CN 203745018 U CN203745018 U CN 203745018U
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Abstract
The utility model relates to a micro ultrasonic gas meter. The micro ultrasonic gas meter is composed of a base with a gas inlet and a gas outlet, a fluid channel, a sensor and an inner shell; the base, the fluid channel, the sensor and the inner shell are orderly mounted; the inner shell covers the fluid channel and the sensor and is hermetically connected with the base; a control device connected with the sensor is arranged on the inner shell; a gas inlet chamber and a gas outlet chamber, the two of which are communicated with the gas inlet and the gas outlet, respectively, are arranged in the base; the gas inlet chamber is communicated with the gas outlet chamber by virtue of the fluid channel; due to layer-by-layer attenuation by use of the gas channel, the loss of air pressure is controlled below 200Pa.
Description
Technical field
The utility model belongs to instrument field, is specifically related to a kind of micro-ultrasonic gas meter, flow meter.
Background technology
Along with people's living standard improves constantly, the reinforcement of people's environmental protection meaning, the urbanization of China increases the fast development of journey, and country is universal fast to the continuous input of rock gas clean energy resource and urban pipe network, welcomes a unprecedented opportunity to develop for supporting relevant enterprise.
And current gas meter, flow meter is to follow Muscovite standard mostly, its air pressure loss is 1800 Pascals, but because this atmospheric pressure lost is too high, do not meet world standard, to such an extent as to ultrasonic wave gas meter can not large-scale popularization,, and be not accepted because security is too low in Europe, therefore develop the ultrasonic wave gas meter of air pressure loss under 200 Pascals, adapt to current gas meter, flow meter development trend.
Utility model content
The shortcoming and defect existing for prior art, the utility model provides a kind of micro-ultrasonic gas meter, flow meter, and it can be controlled at atmospheric pressure lost under 200 Pascals, meets current world standard.
The technical scheme that the utility model adopts is: a kind of micro-ultrasonic gas meter, flow meter, it is installed in order by having the base of air intake opening and gas outlet, the fluid passage that enters gaseous tension for decaying, sensor and inner casing, inner casing is connected fluid passage therein and with base seal with sensor wrap, inner casing is provided with the control device being connected with sensor electrical, in described base, be provided with the inlet chamber and the outlet chamber that are communicated with air intake opening and gas outlet respectively, described inlet chamber is communicated with by fluid passage with outlet chamber.
Described fluid passage comprises the gas flow sheet I, gas flow sheet II, gas flow sheet III, gas flow sheet IV, gas flow sheet V, gas flow sheet VI, gas flow sheet VII, gas flow sheet VIII and the gas flow sheet IX that are arranged in order from the bottom up.
Described gas flow sheet VII, gas flow sheet I, gas flow sheet II, gas flow sheet IV, gas flow sheet V and gas flow sheet VIII are two.
Described gas flow sheet I arranges respectively arc gap up and down, four circular holes that symmetrical arrangement distributes along center of circle fan-shaped, and second circular hole opened respectively " system " font slotted eye laterally; Described gas flow sheet II arranges respectively arc gap up and down, four circular holes that symmetrical arrangement distributes along center of circle fan-shaped, and symmetrical the 3rd circular hole is communicated with, form " T " font passage, and its two ends, left and right have and the gap slot of " system " font slotted eye conducting of gas flow sheet I; Described gas flow sheet III arranges respectively arc gap up and down, four circular holes that symmetrical arrangement distributes along center of circle fan-shaped, and the 3rd circular hole oliquely downward has respectively bar shape trench hole; Described gas flow sheet IV and gas flow sheet V are all provided with the slotted eye of " industry " font that class falling at the position in the center of circle, the side of the slotted eye of " industry " font falling in class arranges three pairs of symmetrical circular holes, and below arc gap is set; The upper and lower two ends of described gas flow sheet VI arrange arc gap, and its circle centre position arranges the aperture of 4 symmetric offset spread, four circular holes that left and right symmetric offset spread distributes along center of circle fan-shaped outside aperture, and first circular hole and the 3rd circular hole have class " Z " type groove; Described gas flow sheet VII lower end arranges arc gap, also be provided with " industry " font and 2 downward-sloping slotted eyes of class in the top portion in the position in the center of circle, falling the side, bottom of " industry " font and 2 downward-sloping slotted eyes in class arranges three pairs of symmetrical circular holes, class is fallen " industry " font and 2 downward-sloping slotted eyes and is communicated with the 1st pair of circular hole, and its positive bottom arranges the aperture of a pair of symmetry; Described gas flow sheet VIII arc gap setting up and down, its center of circle is symmetrical arranged 2 pairs of symmetrical apertures up and down, symmetria bilateralis between upper and lower aperture arranges 2 pairs of circular holes, and the circular hole place of lower end arranges with the class of described gas flow sheet VII and falls the horizontal bar-shaped trough of " industry " font and 2 downward-sloping slotted eye conductings; Described gas flow sheet IX upper end arranges arc gap, its circle centre position is provided with the slotted eye of class " industry " font, downside at the slotted eye of class " industry " font arranges a symmetrical circular hole, and described all circular holes and aperture are corresponding one by one in the time that gas flow sheet is arranged under the overlay.
Described fluid passage comprises that the thickness of the gas flow sheet I being arranged in order is from the bottom up 3 ± 0.25mm, gas flow sheet II is 3.25 ± 0.25mm, the thickness of gas flow sheet III is 1 ± 0.25mm, the thickness of gas flow sheet IV is 3 ± 0.25mm, the thickness of gas flow sheet V is 3 ± 0.25mm, the thickness of gas flow sheet VI is 1 ± 0.25mm, the thickness of gas flow sheet VII is 4 ± 0.25mm, the thickness of gas flow sheet VIII is that the thickness of 3 ± 0.25mm and gas flow sheet IX is 3 ± 0.25mm.
Described Circularhole diameter is 5.8 ± 0.25mm, and the radius of described aperture is 2.0 ± 0.25mm.
Described base is step-like space, and bottom sets out air cavity and inlet chamber, and its top is to be highly the space of the arrangement fluid passage of 7.5mm.
Described air intake opening diameter is 22mm, and described gas outlet diameter is 22mm.
Described inlet chamber is cylindrical, and described inlet chamber diameter is 22.5mm, and it is highly 25.5mm.
Described outlet chamber be long be 30mm, the wide rectangle for the center that is base, its diagonal line center of 27mm, the shape of the semicircle that additional two centers taking base form as the center of circle, with radius 20.5mm draw circles and with the width of rectangle, the height of described outlet chamber is 25.5mm.
Air admission hole and venthole are set on the drain pan of described sensor, and described air inlet position fluting makes its air inflow be greater than the air output of the venthole of sensor.
Described control device comprises control chip U3, the temperature sensing circuit with temperature compensation, the power circuit that power supply is provided, current rectifying and wave filtering circuit, comparator circuit, feedback circuit and counting circuit, described current rectifying and wave filtering circuit is connected with comparator circuit, feedback circuit, counting circuit successively, and described counting circuit is connected with control chip U3 respectively with temperature sensing circuit.
Described power circuit adopts solar cell circuit.
The beneficial effects of the utility model are: by the decay layer by layer of gas flow, atmospheric pressure lost is controlled under 200 Pascals.
Brief description of the drawings
Fig. 1 is exploded perspective view of the present utility model.
Fig. 2 is the floor map of gas flow sheet I of the present utility model.
Fig. 3 is the floor map of gas flow sheet II of the present utility model.
Fig. 4 is the floor map of gas flow sheet III of the present utility model.
Fig. 5 is the floor map of gas flow sheet IV of the present utility model.
Fig. 6 is the floor map of gas flow sheet V of the present utility model.
Fig. 7 is the floor map of gas flow sheet VI of the present utility model.
Fig. 8 is the floor map of gas flow sheet VII of the present utility model.
Fig. 9 is the floor map of gas flow sheet VIII of the present utility model.
Figure 10 is the floor map of gas flow sheet IX of the present utility model.
Figure 11 is the schematic perspective view of base of the present utility model.
Figure 12 is the vertical view of base of the present utility model.
Figure 13 is the rear view of sensor of the present utility model.
Figure 14 is the front view of sensor of the present utility model.
Figure 15 is the structural representation with control device of the present utility model.
Figure 16 is the circuit theory diagrams of control chip of the present utility model.
Figure 17 is the circuit theory diagrams of power circuit of the present utility model.
Figure 18 is the circuit theory diagrams of current rectifying and wave filtering circuit of the present utility model and feedback circuit.
Figure 19 is the circuit theory diagrams of testing circuit of the present utility model.
Figure 20 is the circuit theory diagrams of counting circuit of the present utility model.
Figure 21 is the circuit theory diagrams of comparator circuit of the present utility model.
Figure 22 is the circuit theory diagrams of temperature sensing circuit of the present utility model.
Figure 23 is the exploded perspective view of fluid passage embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
As shown in Figure 1, a kind of micro-ultrasonic gas meter, flow meter, it is installed in order by having the base 1 of air intake opening 13 and gas outlet 14, the fluid passage that enters gaseous tension for decaying, sensor 12 and inner casing 2, inner casing 2 is by fluid passage and sensor 12 covers therein and be tightly connected with base 1, inner casing 2 is provided with the control device being electrically connected with sensor 12, in described base 1, be provided with the inlet chamber 15 and the outlet chamber 16 that are communicated with air intake opening 13 and gas outlet 14 respectively, described inlet chamber 15 is communicated with by fluid passage with outlet chamber 16.
As described in Fig. 2-10, described fluid passage comprises the gas flow sheet I 3 that is arranged in order from the bottom up, gas flow sheet II 4, gas flow sheet III 5, gas flow sheet IV 6, gas flow sheet V 7, gas flow sheet VI 8, two gas flow sheet VII 9, gas flow sheet VIII 10 and gas flow sheet IX 11.
Described gas flow sheet I 3 arranges respectively arc gap 33 up and down, four circular holes 31 that symmetrical arrangement distributes along center of circle fan-shaped, and second circular hole 31 opened respectively " system " font slotted eye 32 laterally; Described gas flow sheet II 4 arranges respectively arc gap 33 up and down, four circular holes 31 that symmetrical arrangement distributes along center of circle fan-shaped, and symmetrical the 3rd circular hole 31 is communicated with, form " T " font passage 42, and its two ends, left and right have and the gap slot 41 of " system " font slotted eye 32 conductings of gas flow sheet I 3; Described gas flow sheet III 5 arranges respectively arc gap 33 up and down, four circular holes 31 that symmetrical arrangement distributes along center of circle fan-shaped, and the 3rd circular hole 31 oliquely downward has respectively bar shape trench hole 51; Described gas flow sheet IV 6 and gas flow sheet V 7 are all provided with the slotted eye 61 of " industry " font that class falling at the position in the center of circle, the side of the slotted eye 61 of " industry " font falling in class arranges three pairs of symmetrical circular holes 31, and below arc gap 33 is set; Described gas flow sheet VI arranges arc gap 33 in two ends Shang Xia 8, its circle centre position arranges the aperture 82 of 4 symmetric offset spread, four circular holes 31 that aperture 82 left and right, outside symmetric offset spread distribute along center of circle fan-shaped, first circular hole 31 and the 3rd circular hole 31 have class " Z " type groove 81; Described gas flow sheet VII 9 lower ends arrange arc gap 33, also be provided with " industry " font and 2 downward-sloping slotted eyes 91 of class in the top portion in the position in the center of circle, falling the side, bottom of " industry " font and 2 downward-sloping slotted eyes 91 in class arranges three pairs of symmetrical circular holes 31, class is fallen " industry " font and 2 downward-sloping slotted eyes 91 and is communicated with the 1st pair of circular hole 31, and its positive bottom arranges the aperture 82 of a pair of symmetry; Described gas flow sheet VIII 10 arc gap 33 setting up and down, its center of circle is symmetrical arranged 2 pairs of symmetrical apertures 82 up and down, symmetria bilateralis between upper and lower aperture 82 arranges 2 pairs of circular holes 31, and circular hole 31 places of lower end arrange with the class of described gas flow sheet VII 9 and fall the horizontal bar-shaped trough 101 of " industry " font and 2 downward-sloping slotted eye 91 conductings; Described gas flow sheet IX 11 upper ends arrange arc gap 33, its circle centre position is provided with the slotted eye 111 of class " industry " font, downside at the slotted eye 111 of class " industry " font arranges a symmetrical circular hole 31, and described all circular holes 31 and aperture 82 are corresponding one by one in the time that gas flow sheet is arranged under the overlay.
Referring to Figure 23, described gas flow sheet VII 9, gas flow sheet I 3, gas flow sheet II 4, gas flow sheet IV 6, gas flow sheet V 7 and gas flow sheet VIII 10 are two.
Described fluid passage comprises that the thickness of the gas flow sheet I 3 being arranged in order is from the bottom up 3 ± 0.25mm, gas flow sheet II 4 is 3.25 ± 0.25mm, the thickness of gas flow sheet III 5 is 1 ± 0.25mm, the thickness of gas flow sheet IV 6 is 3 ± 0.25mm, the thickness of gas flow sheet V 7 is 3 ± 0.25mm, the thickness of gas flow sheet VI 8 is 1 ± 0.25mm, the thickness of gas flow sheet VII 9 is 4 ± 0.25mm, the thickness of gas flow sheet VIII 10 is that the thickness of 3 ± 0.25mm and gas flow sheet IX 11 is 3 ± 0.25mm.
Described circular hole 31 diameters are 5.8 ± 0.25mm.
The radius of described aperture 82 is 2.0 ± 0.25mm.
As shown in Figure 11 and Figure 12, described base 1 is step-like space, and bottom sets out air cavity 15 and inlet chamber 16, and its top is to be highly the space 17 of the arrangement fluid passage of 7.5mm.
Described air intake opening 13 diameters are 22mm, and described gas outlet 14 diameters are 22mm.
Described inlet chamber 15 is cylindrical, and described inlet chamber 15 diameters are 22.5mm, and it is highly 25.5mm.
The rectangle at the center that its diagonal line center that described outlet chamber 16 is 30mm, the wide 27mm of being for length is base, the shape of the semicircle that additional two centers taking base form as the center of circle, with radius 20.5mm draw circles and with the width of rectangle, the height of described outlet chamber 16 is 25.5mm.
Rock gas enters inlet chamber 16 from air intake opening 13, enter in the space 17 of arrangement fluid passage of base 1 along the arc gap 33 of gas flow sheet I 3 and gas flow sheet II 4 upsides, enter " system " font slotted eye 32 of gas flow sheet I 3 along the gap slot 41 of gas flow sheet II 4, enter outlet chamber 16 from second circular hole 31 simultaneously, carry out air pressure decay for the first time, along " T " font passage 42 of gas flow sheet II 4 and enter outlet chamber 16 by the 3rd circular hole 31 and carry out for the second time air pressure decay, then by gas flow sheet III 5, above-mentioned two gas flow sheets are carried out to channel seal, avoid the slotted eye 61 of " industry " font and " T " font passage 42 of gas flow sheet II 4 that the class of gas flow sheet IV 6 and gas flow sheet V 7 is being fallen to be communicated with, avoid the change of fluid of the decay of gas, oliquely downward have respectively bar shape trench hole 51 at the 3rd circular hole 31 of gas flow sheet III 5 simultaneously, decay for the third time, moreover the slotted eye 61 of " industry " font falling along the class of gas flow sheet IV 6 and gas flow sheet V 7 enters outlet chamber 16 from the 4th circular hole 31, carry out the 4th decay, then gas flow sheet VI 8 is set, the slotted eye 61 of " industry " font that this gas flow sheet is falling to gas flow sheet IV 6 and gas flow sheet V 7 classes is isolated, and its first circular hole 31 and the 3rd circular hole 31 have class " Z " type groove 81 and carry out the 5th decay, the slotted eye 61 that simultaneously its circle centre position arranges " industry " font that the aperture 82 of 4 symmetric offset spread falling with gas flow sheet IV 6 and gas flow sheet V 7 classes is communicated with, the top portion in position in the center of circle of described gas flow sheet VII 9 is provided with " industry " font and 2 downward-sloping slotted eyes 91 of class, falling the side, bottom of " industry " font and 2 downward-sloping slotted eyes 91 in class arranges three pairs of symmetrical circular holes 31, class fall " industry " font and 2 downward-sloping slotted eyes 91 by middle aperture be communicated with gas flow sheet VI 8, and be communicated with the first circular hole 31, class is fallen the positive bottom of " industry " font and 2 downward-sloping slotted eyes 91 aperture 82 of a pair of symmetry is set, symmetrical aperture 82 and the gas flow sheet IV 6 of its underpart, gas flow sheet V 7 and gas flow sheet VI 8 are communicated with, the center of circle of described gas flow sheet VIII 10 is symmetrical arranged 2 pairs of symmetrical apertures 82 up and down, symmetria bilateralis between upper and lower aperture 82 arranges 2 pairs of circular holes 31, circular hole 31 places of lower end arrange with the class of described gas flow sheet VII 9 and fall the horizontal bar-shaped trough 101 of " industry " font and 2 downward-sloping slotted eye 91 conductings, proceed decay, the circle centre position of described gas flow sheet IX 11 is provided with the slotted eye 111 of class " industry " font, downside at the slotted eye 111 of class " industry " font arranges a symmetrical circular hole 31, this circular hole 31 is communicated with the 3rd circular hole, the slotted eye 111 of class " industry " font is communicated with the second circular hole 31 respectively simultaneously, and with the top and the aperture 82 of below be communicated with, form final decay, top arranges sensor simultaneously, referring to Figure 13, sensor air admission hole 121 place's flutings make its air inflow be greater than the air output of sensor venthole 122, form a pressure differential, to carrying out air pressure detection in the space 17 of this arrangement fluid passage, and by the decay layer by layer of 9 layers of gas flow sheet, the air pressure that makes to arrive sensor place is lower.
Gas enters from the air intake opening 13 of table, arrive sensor through fluid passage, turn back to again base 1, finally discharge from gas outlet by outlet chamber, the various passages of whole Process Design, simply lengthen gas channel, can lose excessive along stroke pressure by city's gas, affect the effect of giving vent to anger, various passages adopt arc transition to avoid forming the bumpy flow of gas, reduce the loss of pressure.
As shown in figure 14, be provided for line outlet that sensor 12 is electrically connected with control device on the lid of described sensor 12, described line outlet, by sealant sealing, ensures the sealing of gas meter, flow meter inside, can be because the line outlet of sensor causes occurring losing heart.
Draw by a large amount of experiments, adopt the shape of thickness, aperture and the gas flow sheet of the utility model employing, can be effectively by hydromechanical knowledge, realize atmospheric pressure lost of the present utility model is reduced to below 200 Pascals, to meet the safety standard in Europe and the world, promote the popularization of micro-ultrasonic gas meter, flow meter to global range.
As shown in figure 15; the utility model is installed control device at inner casing 2 upsides, and described control device passes sensor line outlet by electric wire is connected with sensor, and adopts fluid sealant to carry out encapsulation process; prevent that it from losing heart, and by outer cover, piece cover is protected in inside.
As Figure 16, Figure 17, Figure 18, Figure 19, Figure 20, shown in Figure 21 and Figure 22, described control device comprises the control chip U3 with temperature compensation, temperature sensing circuit, the power circuit of power supply is provided, current rectifying and wave filtering circuit, comparator circuit, feedback circuit and counting circuit, described control device comprises the control chip U3 with temperature compensation, temperature sensing circuit, the power circuit of power supply is provided, current rectifying and wave filtering circuit, comparator circuit, feedback circuit and counting circuit, described current rectifying and wave filtering circuit successively with comparator circuit, feedback circuit, counting circuit connects, described counting circuit is connected with control chip U3 respectively with temperature sensing circuit.
Collection signal POINT is after rectifying and wave-filtering, in the effect by raising frequency circuit, the frequency of signal is improved, and amplify output by operational amplifier LM324, feeding back by feedback circuit and be input to comparator circuit, limiting wavelength signals output by comparator circuit, comparer U1 output signal is to the counting chip U5 of counting circuit, carry out counting operation, then come in and go out and arrive control chip U3, the temperature that control chip U3 detects temperature sensing circuit by the temperature-compensation circuit of self is carried out thermal compensation operation to the signal of input.
As shown in figure 22, described temperature sensing circuit adopts thermo-sensitive resistor RT2 and thermo-sensitive resistor RT3, can adopt a thermo-sensitive resistor RT2 just passable, realizes the detection of temperature.
Piezoelectricity wave test (technology of acoustic wave) product that the employing cyclone vortex of releasing forms, its principle is that air-flow is by above-mentioned special runner control, according to fluid mechanics principle, make it to produce the eddy airstream needing, eddy airstream is at the vibrative piezoelectric signal in film piezo-electric sheet both sides, piezoelectric signal after filtering, amplify, translation, after shaping, extract a pulse signal being directly proportional to flow, control chip U3 pulse signals is measured and is analyzed, and measure temperature according to temperature sensing circuit, compensate according to temperature (temperature beyond standard state) the gas volume variation that modifying factor temperature causes, and converse gas volume under standard state, simultaneously, storage total flow data also show.
As shown in figure 16, described control chip U3 adopts HT67F40 chip, this chip has contains complete and diversified function, include the core specification such as 2K ~ 12K Word Flash program internal memory, 128 ~ 640 Byte data-carrier stores, 64 ~ 256 Byte Data EEPROM and 4 ~ 12 Level Stack, have practical peripheral circuit concurrently, such as built-in R-type and power conservation type C-type LCD Driver can support to need the application such as clock display simultaneously; The high-speed A/D converter of 12, in order to the signal that captures external environment as temperature, humidity etc.; Simultaneously SPI and the SPI/I2C interface of built-in comparer and two groups of independent runnings, can directly realize the function of internal temperature compensation by chip, its periphery arranges crystal oscillating circuit.
The all right externally connected with display screen of described control chip U3, carries out data demonstration by display screen.
As shown in figure 17, described power circuit employing diode to 3.6V, then surely arrives 3V by three-terminal voltage-stabilizing chip Q1 by power supply, so that the power supply supply of whole circuit to be provided by the 4.7V voltage transitions of lithium battery T2.
Described power circuit also can adopt solar cell circuit, adopts solar cell to substitute lithium battery in the past, realizes sustainable use, is conducive to environmental protection cause.
As shown in figure 19, described control device is also provided with testing circuit.By on circuit, extract with output point C5_OUT, this product is detected, make to detect more convenient.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection domain of the present utility model.
Claims (13)
1. a micro-ultrasonic gas meter, flow meter, it is characterized in that: it is by the base (1) with air intake opening (13) and gas outlet (14), enter the fluid passage of gaseous tension for decaying, sensor (12) and inner casing (2) are installed in order, inner casing (2) is tightly connected fluid passage and sensor (12) cover therein and with base (1), inner casing (2) is provided with the control device being electrically connected with sensor (12), in described base (1), be provided with the inlet chamber (15) and the outlet chamber (16) that are communicated with air intake opening (13) and gas outlet (14) respectively, described inlet chamber (15) is communicated with by fluid passage with outlet chamber (16).
2. micro-ultrasonic gas meter, flow meter according to claim 1, it is characterized in that, described fluid passage comprises the gas flow sheet I (3), gas flow sheet II (4), gas flow sheet III (5), gas flow sheet IV (6), gas flow sheet V (7), gas flow sheet VI (8), gas flow sheet VII (9), gas flow sheet VIII (10) and the gas flow sheet IX (11) that are arranged in order from the bottom up.
3. micro-ultrasonic gas meter, flow meter according to claim 2, it is characterized in that, described gas flow sheet VII (9), gas flow sheet I (3), gas flow sheet II (4), gas flow sheet IV (6), gas flow sheet V (7) and gas flow sheet VIII (10) are two.
4. according to the micro-ultrasonic gas meter, flow meter described in claim 2 or 3, it is characterized in that, described gas flow sheet I (3) arranges respectively arc gap (33) up and down, four circular holes (31) that symmetrical arrangement distributes along center of circle fan-shaped, and second circular hole (31) opened respectively " system " font slotted eye (32) laterally; Described gas flow sheet II (4) arranges respectively arc gap (33) up and down, four circular holes (31) that symmetrical arrangement distributes along center of circle fan-shaped, and symmetrical the 3rd circular hole (31) is communicated with, form " T " font passage (42), and its two ends, left and right have and the gap slot (41) of " system " font slotted eye (32) conducting of gas flow sheet I (3); Described gas flow sheet III (5) arranges respectively arc gap (33) up and down, four circular holes (31) that symmetrical arrangement distributes along center of circle fan-shaped, and the 3rd circular hole (31) oliquely downward has respectively bar shape trench hole (51); Described gas flow sheet IV (6) and gas flow sheet V (7) are all provided with the slotted eye (61) of " industry " font that class falling at the position in the center of circle, the side of the slotted eye (61) of " industry " font falling in class arranges three pairs of symmetrical circular holes (31), and below arc gap (33) is set; The upper and lower two ends of described gas flow sheet VI (8) arrange arc gap (33), its circle centre position arranges the aperture (82) of 4 symmetric offset spread, four circular holes (31) that left and right, aperture (82) outside symmetric offset spread distributes along center of circle fan-shaped, first circular hole (31) and the 3rd circular hole (31) have class " Z " type groove (81); Described gas flow sheet VII (9) lower end arranges arc gap (33), also be provided with " industry " font and 2 downward-sloping slotted eyes (91) of class in the top portion in the position in the center of circle, falling the side, bottom of " industry " font and 2 downward-sloping slotted eyes (91) in class arranges three pairs of symmetrical circular holes (31), class is fallen " industry " font and 2 downward-sloping slotted eyes (91) and is communicated with the 1st pair of circular hole (31), and its positive bottom arranges the aperture (82) of a pair of symmetry; Described gas flow sheet VIII (10) arc gap setting up and down (33), its center of circle is symmetrical arranged 2 pairs of symmetrical apertures (82) up and down, symmetria bilateralis between upper and lower aperture (82) arranges 2 pairs of circular holes (31), and the circular hole (31) of lower end is located to arrange with the class of described gas flow sheet VII (9) and fallen the horizontal bar-shaped trough (101) of " industry " font and 2 downward-sloping slotted eye (91) conductings; Described gas flow sheet IX (11) upper end arranges arc gap (33), its circle centre position is provided with the slotted eye (111) of class " industry " font, downside at the slotted eye (111) of class " industry " font arranges a symmetrical circular hole (31), and described all circular holes (31) and aperture (82) are corresponding one by one in the time that gas flow sheet is arranged under the overlay.
5. micro-ultrasonic gas meter, flow meter according to claim 3, it is characterized in that, described fluid passage comprises that the thickness of the gas flow sheet I (3) being arranged in order is from the bottom up 3 ± 0.25mm, gas flow sheet II (4) is 3.25 ± 0.25mm, the thickness of gas flow sheet III (5) is 1 ± 0.25mm, the thickness of gas flow sheet IV (6) is 3 ± 0.25mm, the thickness of gas flow sheet V (7) is 3 ± 0.25mm, the thickness of gas flow sheet VI (8) is 1 ± 0.25mm, the thickness of gas flow sheet VII (9) is 4 ± 0.25mm, the thickness of gas flow sheet VIII (10) is that the thickness of 3 ± 0.25mm and gas flow sheet IX (11) is 3 ± 0.25mm.
6. micro-ultrasonic gas meter, flow meter according to claim 4, is characterized in that, described circular hole (31) diameter is 5.8 ± 0.25mm, and the radius of described aperture (82) is 2.0 ± 0.25mm.
7. micro-ultrasonic gas meter, flow meter according to claim 1, is characterized in that, described base (1) is step-like space, and bottom sets out air cavity (15) and inlet chamber (16), and its top is to be highly the space (17) of the arrangement fluid passage of 7.5mm.
8. micro-ultrasonic gas meter, flow meter according to claim 1, is characterized in that, described air intake opening (13) diameter is 22mm, and described gas outlet (14) diameter is 22mm.
9. according to the micro-ultrasonic gas meter, flow meter described in claim 1 or 7, it is characterized in that, described inlet chamber (15) is cylindrical, and described inlet chamber (15) diameter is 22.5mm, and it is highly 25.5mm.
10. according to the micro-ultrasonic gas meter, flow meter described in claim 1 or 7, it is characterized in that, the rectangle at the center that its diagonal line center that described outlet chamber (16) is 30mm, the wide 27mm of being for length is base, the shape of the semicircle that additional two centers taking base form as the center of circle, with radius 20.5mm draw circles and with the width of rectangle, the height of described outlet chamber (16) is 25.5mm.
11. micro-ultrasonic gas meter, flow meters according to claim 1, it is characterized in that, air admission hole (121) and venthole (122) are set on the drain pan of described sensor (12), and described air admission hole (121) is located fluting makes its air inflow be greater than the air output of the venthole (122) of sensor (12).
12. micro-ultrasonic gas meter, flow meters according to claim 1, it is characterized in that, described control device comprises control chip U3, the temperature sensing circuit with temperature compensation, the power circuit that power supply is provided, current rectifying and wave filtering circuit, comparator circuit, feedback circuit and counting circuit, described current rectifying and wave filtering circuit is connected with comparator circuit, feedback circuit, counting circuit successively, and described counting circuit is connected with control chip U3 respectively with temperature sensing circuit.
13. micro-ultrasonic gas meter, flow meters according to claim 12, is characterized in that, described power circuit adopts solar cell circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139972.4U CN203745018U (en) | 2014-03-26 | 2014-03-26 | Micro ultrasonic gas meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139972.4U CN203745018U (en) | 2014-03-26 | 2014-03-26 | Micro ultrasonic gas meter |
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| CN203745018U true CN203745018U (en) | 2014-07-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868557B (en) * | 2014-03-26 | 2017-10-20 | 温州博真仪表科技有限公司 | Micro-ultrasonic gas meter, flow meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868557B (en) * | 2014-03-26 | 2017-10-20 | 温州博真仪表科技有限公司 | Micro-ultrasonic gas meter, flow meter |
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Granted publication date: 20140730 Termination date: 20160326 |