CN201653468U

CN201653468U - Inner suspension gas flow device

Info

Publication number: CN201653468U
Application number: CN2009203178725U
Authority: CN
Inventors: 刘珉恺
Original assignee: Xian Xinwei Information Technology Co Ltd
Current assignee: Xian Xinwei Information Technology Co Ltd
Priority date: 2009-12-20
Filing date: 2009-12-20
Publication date: 2010-11-24
Anticipated expiration: 2019-12-20

Abstract

The utility model relates to a flow meter, in particular to an inner suspension gas flow meter. The inner suspension gas flow device is characterized in that the flow device at least comprises a vertical conical pipe and a float which are fixed in a casing; the casing is connected with an upper flange and a lower flange; an upper support frame and a lower support frame are arranged at an upper inlet and a lower inlet of the upper flange and the lower flange; piston cavity structures are arranged at the centers of the upper support frame and the lower support frame; the float is arranged in the conical pipe; guide rods are arranged at the upper end and the lower end of the float and extend into piston cavities of the upper support frame and the lower support frame; under the action of gas, the guide rods can move freely and vertically; photoelectric scanning circuits are fixed in the guide rods in the piston cavities; gray code flow marks are arranged on the walls of the piston cavities; when gas enters, the pistons moves vertically; the gray code flow marks on the walls of the piston cavities are read by the photoelectric scanning circuits in the guide rods; and the read and processed flow value is transmitted to a secondary meter by processors in the photoelectric scanning circuits through a photoelectric output circuit. The utility model not only can ensure the precision of the flow, but also can simplify the processing process of the flow meter.

Description

The inner suspension gas flow meter

Technical field

The utility model relates to a kind of flow instrument, particularly the inner suspension gas flow meter.

Background technology

Existing float flowmeter is made up of vertical taper pipe and a float group that moves up and down along the Taper Pipe axle of a bottom-up expansion.When detected fluid is passed through the annular space of Taper Pipe and float formation from bottom to top, the float upper and lower side produces differential pressure and forms the power that float rises, when the suffered raising force of float when being immersed in the fluid float weight, float just rises, and the annular space area increases thereupon, and annular space place rate of flow of fluid descends immediately, float upper and lower side differential pressure reduces, the raising force that acts on float is also along with minimizing, and when raising force equaled to be immersed in the fluid float weight, float just was stabilized in a certain height.Float height and flow of passing through in Taper Pipe have corresponding relation.The flow number majority is an indicator formula structure in this instrument, adopt and digitally then read by magnetic reading head by the magnetic position in the float, show by processing of circuit, because magnetic position is limited by the magnetic reading head conversion accuracy, influenced the precision of float flowmeter, the highest design is in the precision of 1 grade of table.

Summary of the invention

The purpose of this utility model provides the high inner suspension gas flow meter of a kind of precision. [0004]The purpose of this utility model is to realize like this, the inner suspension gas flow meter, it is characterized in that: vertical taper pipe and a float that moves up and down along the taper tubular axis of which comprises at least a bottom-up expansion are fixed in the housing, housing connects upper flange, lower flange, lower inlet has upper support frame and lower support frame on upper flange and lower flange, upper support frame and lower support frame center are the plunger shaft structure, float is arranged in the tapered tube, float two ends up and down is a guide pole, guide pole puts in the plunger shaft of upper support frame and lower support frame, under the gas effect, can freely move up and down, guide pole in plunger shaft is fixed with the optoelectronic scanning circuit, the plunger shaft wall has Gray code flow mark, and when gas entered, piston changed up and down, the fixing optoelectronic scanning circuit of guide pole reads the Gray code flow mark of plunger shaft wall, and the flow value that the processor in the optoelectronic scanning circuit will read and handle sends to secondary instrument by the photoelectric yield circuit.

The coding of described plunger shaft wall is linear flow coding.

The coding of described plunger shaft wall is a nonlinear flow amount coding.

Described flow coding is a Gray code.

Described processor is electrically connected with radio circuit, and the flow information that processor will read and handle sends to secondary instrument by radio circuit.

Described processor is electrically connected with light emitting diode, and the flow information that processor will read and handle sends to the input end of fiber coupler by light emitting diode, is sent to secondary instrument by optical fiber again.

The utility model has the advantages that: because when gas entered, the piston in the tapered tube moved up and down, the coding that the optoelectronic scanning circuit in the piston reads the piston in cylinder wall of Taper Pipe structure shows flow.The optoelectronic scanning circuit comprises that photoelectricity reads circuit, battery and processor, and the flow value that processor will read and handle sends to secondary instrument by the photoelectric yield circuit.Precision that can not only dependable flow, and simplified the processing technology of flowmeter.

Description of drawings

The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:

Fig. 1 is the utility model example structure synoptic diagram;

Fig. 2 is the circuit theory diagrams that the optoelectronic scanning circuit has fiber coupler;

Fig. 3 is the circuit theory diagrams that the optoelectronic scanning circuit has radio circuit.

Among the figure: 1, housing; 2, lower support frame; 3, piston; 4, Gray code flow mark; 5, guide pole; 6, upper support frame; 7, tapered tube; 8, optoelectronic scanning circuit; 9, battery; 11, luminotron; 12, fiber coupler; 13, optical fiber; 14, radio-frequency transmissions circuit; 15, bias light light emitting diode; 16, radio-frequency (RF) receiving circuit; 17, photoelectric receiving tube; 18, processor; 19, outer timing circuit; 20, secondary instrument; 21, upper flange; 22, lower flange; 23, float.

Embodiment

As shown in Figure 1, the inner suspension gas flow meter, comprise that the vertical taper pipe 7 of a bottom-up expansion and one are fixed in the housing 1 along 7 floats that move up and down 23 of tapered tube, housing 1 connects upper flange 21, lower flange 22, lower inlet has upper support frame 6 and lower support frame 2 on upper flange 21 and lower flange 22, upper support frame 6 and lower support frame 2 centers are the plunger shaft structure, float 23 is arranged in the tapered tube 7, float about in the of 23 two ends be guide pole 5, guide pole 5 puts in the plunger shaft of upper support frame 6 and lower support frame 2, under the gas effect, can freely move up and down, guide pole 5 in plunger shaft is fixed with optoelectronic scanning circuit 8, the plunger shaft wall has Gray code flow mark 4, when detected fluid is passed through the annular space of tapered tube 7 and float 23 formation from bottom to top, float 23 upper and lower sides produce differential pressure and form the power that float rises, when float 23 suffered raising forces when being immersed in the fluid float weight, float 23 just rises, the annular space area increases thereupon, annular space place rate of flow of fluid descends immediately, and float upper and lower side differential pressure reduces, and the raising force that acts on float is also along with minimizing, when raising force equaled to be immersed in the fluid float weight, float just was stabilized in a certain height.Float 23 height and flow of passing through in Taper Pipe 7 have correspondence, when gas enters, piston 3 changes up and down, and guide pole 5 fixing optoelectronic scanning circuit 8 read the Gray code flow mark 4 of plunger shaft wall, and the coding of described plunger shaft wall is linearity or nonlinear flow coding.The flow value that processor 18 in the optoelectronic scanning circuit 8 will read and handle sends to secondary instrument 20 by the photoelectric yield circuit.

Embodiment 1

Fig. 2 is optoelectronic scanning circuit 8 circuit theory diagrams that pass through optical fiber 13 to secondary table delivery rate information, optoelectronic scanning circuit 8 comprises that photoelectricity reads circuit, battery 9 and processor 18(single-chip microcomputer EM78P458), single-chip microcomputer EM78P458I/O mouth is electrically connected with photoelectricity and reads circuit, photoelectricity reads circuit and is made up of bias light light emitting diode 15 and photoelectric receiving tube 17, bias light light emitting diode 15 is worked luminous when reading Gray code flow mark 4, supply light intensity to plunger shaft, photoelectric receiving tube 17 is corresponding one by one with Gray's encoding stream amount mark 4 each code channel, during bias light light emitting diode 15 luminous (work following time of 100US), single-chip microcomputer EM78P458 reads the intensity signal of each photoelectric receiving tube 17 by the I/O mouth of correspondence, the value of reading is 1 during for high level, and the value of reading is that 0(also can be on the contrary during for low level).At last the flow information that reads is sent to fiber coupler 12 on the shell body by infraluminescence pipe 11, send to secondary instrument 20 by optical fiber 13 again.

Embodiment 2

Fig. 3 be one by optoelectronic scanning circuit 8 circuit theory diagrams of optical fiber to secondary table delivery rate information, optoelectronic scanning circuit 8 comprises that photoelectricity reads circuit, battery 9 and processor 18(single-chip microcomputer EM78P458), single-chip microcomputer EM78P458I/O mouth is electrically connected with photoelectricity and reads circuit, photoelectricity reads circuit 8 and is made up of bias light light emitting diode 15 and photoelectric receiving tube 17, bias light light emitting diode 15 is worked luminous when reading Gray code flow mark 4, supply light intensity to plunger shaft, photoelectric receiving tube 17 is corresponding one by one with Gray's encoding stream amount mark 4 each code channel, during bias light light emitting diode 15 luminous (work following time of 100US), single-chip microcomputer EM78P458 reads the intensity signal of each photoelectric receiving tube 17 by the I/O mouth of correspondence, the value of reading is 1 during for high level, and the value of reading is that 0(also can be on the contrary during for low level).At last the flow information that reads is sent to radio-frequency (RF) receiving circuit 16 by radio-frequency transmissions circuit 14, be electrically connected with secondary instrument 20 by interface, show flow by secondary instrument 20 by radio-frequency (RF) receiving circuit 16.

Because single-chip microcomputer EM78P458 can not work under continuous duty, power consumption is big like this, the electric current that is provided by battery 9 can run out of under the very short time, therefore, single-chip microcomputer EM78P458 carries out with periodic working method, and every 0.1S-1S work once, each working time 200US, can keep long work like this, adopt 3.6V/2A as battery 9, but the flowmeter continuous working be more than 3 years.Guarantee that single-chip microcomputer EM78P458 timing working is provided the timing of 0.1S-1S by the outer timing circuit 19 that is electrically connected.

Claims

1. inner suspension gas flow meter, it is characterized in that: vertical taper pipe (7) and a float (23) that moves up and down along tapered tube (7) axle of which comprises at least a bottom-up expansion are fixed in the housing (1), housing (1) connects upper flange (21), lower flange (22), at upper flange (21) and the last lower inlet of lower flange (22) upper support frame (6) and lower support frame (2) are arranged, upper support frame (6) and lower support frame (2) center are the plunger shaft structure, float (23) is arranged in the tapered tube (7), float (23) two ends up and down is guide pole (5), guide pole (5) puts in the plunger shaft of upper support frame (6) and lower support frame (2), under the gas effect, can freely move up and down, guide pole (5) in plunger shaft is fixed with optoelectronic scanning circuit (8), the plunger shaft wall has Gray code flow mark (4), when gas enters, piston (3) changes up and down, the fixing optoelectronic scanning circuit (8) of guide pole (5) reads the Gray code flow mark (4) of plunger shaft wall, and the flow value that the processor (18) in the optoelectronic scanning circuit (8) will read and handle sends to secondary instrument (20) by the photoelectric yield circuit.

2. inner suspension gas flow meter according to claim 1 is characterized in that: the coding of described plunger shaft wall is linear flow coding.

3. inner suspension gas flow meter according to claim 1 is characterized in that: the coding of described plunger shaft wall is a nonlinear flow amount coding.

4. inner suspension gas flow meter according to claim 1, it is characterized in that: described processor (18) is electrically connected with light emitting diode, the flow information that processor (18) will read and handle sends to the input end of fiber coupler (12) by light emitting diode, is sent to secondary instrument (20) by optical fiber again.

5. inner suspension gas flow meter according to claim 1 is characterized in that: described processor (18) is electrically connected with radio circuit, and the flow information that processor (18) will read and handle sends to secondary instrument (20) by radio circuit.