CN103335773A - Pipeline gas pressure measuring device - Google Patents
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- CN103335773A CN103335773A CN2013100539807A CN201310053980A CN103335773A CN 103335773 A CN103335773 A CN 103335773A CN 2013100539807 A CN2013100539807 A CN 2013100539807A CN 201310053980 A CN201310053980 A CN 201310053980A CN 103335773 A CN103335773 A CN 103335773A
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Abstract
The invention discloses a pipeline gas pressure measuring device. The pipeline gas pressure measuring device is composed of a shell (1), one or more measuring pipes (2), a line pipe (3), one or more pressure equalizing tanks (4) and a differential pressure transducer (5), and the shell (1) is embedded in a ventilating pipeline. The pipeline gas pressure measuring device is characterized in that the shell (1) is provided with one or more measuring pipes (2) in the radial direction, the measuring pipe (2) extends out of the shell and is provided with a plurality of measuring holes; the shell is provided with one or more pressure equalizing tanks (4), an input pipe (41) of the pressure equalizing tank (4) is communicated with the pressure measuring pipe (21) through the line pipe (3), and an output pipe (42) is communicated with the differential pressure transducer (5) through the line pipe (3). The pipeline gas pressure measuring device disclosed by the utility model has the advantages of high detection precision, good stability, and ability of effectively suppressing server impacts brought about to a measuring value by random mutation pressure generated by high-speed turbulences in an air pipe.
Description
Affiliated technical field:
The invention belongs to the room ventilation technical field, particularly relate to the pipeline gas pressure tester of measuring gaseous tension in the ventilating duct.
Background technology:
The blast furnace process air port dynamic pressure measurement device of China's utility model patent 200720102886.6, in order to solve the problem of in the existing blast furnace process any wind pressure measurement device not being installed and can't in time detecting each air port air intake pressure of blast furnace circumference, blocking problem occurs in time handling the air port intake stack, a kind of blast furnace process air port dynamic pressure measurement device is provided.This utility model is to adopt following technical scheme to be: this device comprises the connecting pipe that is threaded with blast-furnace tuyere peephole mirror short tube, and connecting pipe is provided with the piezometric tube that communicates with it, and by-pass valve control is set on the piezometric tube, and tensimeter is equipped with in the piezometric tube upper end.This pressure tester is used for reference the principle that the hydraulic pressure pipe network system pressure transmits, and selects air blast to enter the preceding air port peephole Jing Chu of blast furnace and carries out pressure measurement.Connecting pipe is communicated with by screw thread with the short tube of air port peephole mirror, detects the blast pressure at this place then by the tensimeter on the piezometric tube.By repeating aforesaid operations, detect the blast pressure in each air port of blast furnace circumference, the numerical value that detected blast numerical value and hot-blast main place are monitored compares, judge according to difference size whether this place pipeline has obstruction or the air blast situation of being obstructed, and then in a planned way carry out damping down and handle, make the very fast recovery stable smooth operation of conditions of blast furnace, avoid the working of a furnace to fluctuate widely production is impacted.
But there is following shortcoming in the blast furnace process of this utility model with air port dynamic pressure measurement device:
1, measuring process complexity, this utility model are that air port peephole lens device is pulled to the blind plate position in the specific implementation, unload air port peephole mirror nut, and an end of connecting pipe of the present utility model is connected with the bolt of air port peephole mirror short tube; Then air port peephole lens device is pushed into normal working position, opens the by-pass valve control on the piezometric tube, the numerical value that recording manometer is measured, closing control valve again; Air port peephole mirror is pulled to the blind plate position again, unloads connecting pipe by rotary handle, install air port peephole mirror nut, air port peephole mirror is returned to normal operation position, this place's air port pressure measurement finishes.Its measuring process is quite complicated loaded down with trivial details.
2, measuring accuracy is low, and the structure of this utility model device is to comprise the connecting pipe that is threaded with blast-furnace tuyere peephole mirror short tube, and connecting pipe is provided with the piezometric tube that communicates with it, and by-pass valve control is set on the piezometric tube, and tensimeter is equipped with in the piezometric tube upper end.Reading on this tensimeter is to detect each air port air intake pressure of blast furnace circumference, but has certain deviation in blast furnace circle center position and force value all around, and this device can't be measured exact value.
At the problem that the ventilating duct manometric technique exists, the inventor has createed ventilating duct gas pressure tester of the present invention by research repeatedly.
Summary of the invention:
Fundamental purpose of the present invention is to disclose a kind of ventilating duct gas pressure tester, the accurately force value of measuring channel gas.
Another object of the present invention is to disclose a kind of ventilating duct gas pressure tester, accurately the static pressure of measuring channel gas.
A further object of the present invention is to disclose a kind of ventilating duct gas pressure tester, accurately the dynamic pressure value of measuring channel gas.
Principle of the present invention is the venturi pressure tester, is the interior dynamic pressure of little choke valve formula pipeline, the static pressure mean value sampler that aims at the supporting design of air conditioning system with variable.Pressure tester can be as common air-valve design and installation each position, reference mark in appointment, at system's dynamic pressure value or static pressure that measures the each point position in service in good time, cooperate micro-pressure sensor and PLC (DDC) controller, realize the variable frequency control of blower fan and show dynamic air quantity.Micro-pressure sensor can be described as differential pressure pickup or converter again.
If only need blower fan is carried out variable frequency control, can select the static pressure pressure tester for use; If also will show in good time air quantity when carrying out variable frequency control again, can select the dynamic pressure pressure tester for use.
When in the system that the building automatic control is arranged or the variable air rate fractional energy savings is had relatively high expectations, using, should match a plurality of pressure tester according to the number of major control node, and think highly of according to end in control and to count dynamic rule to the pipeline coordination resistance at top, the weight system of each pressure tester value is set, make the fan frequency conversion regulatory demand amount after the static pressure weighted mean value (deviate) finally obtained can the most real applying systematic air flow changes, thereby the influence that the air quantity that makes each branch line of system is not changed by contiguous branch air quantity break-make, or influence is controlled in the allowed band, reach and in the fan frequency conversion process, keep the invariable purpose of air quantity that is in running status branch all the time, and make fan operation reach optimum energy-saving effect.
The present invention realizes the object of the invention by following technical scheme.
Pipeline gas pressure tester of the present invention is made up of housing, piezometric tube, spool, equalizer tank and differential pressure pickup, and its middle shell is circulating line, is inlaid in the ventilating duct; It is characterized in that: be provided with the piezometric tube more than one or in this housing, this piezometric tube stretches out outside the housing, is provided with gaging hole at this piezometric tube; This housing is provided with one or more equalizer tank, and the input pipe of this equalizer tank is communicated with this piezometric tube by spool, and the efferent duct of this equalizer tank is communicated with differential pressure pickup by spool.
Pipeline gas pressure tester of the present invention is made up of housing, piezometric tube, spool, equalizer tank and differential pressure pickup, and its middle shell is circulating line, is inlaid in the ventilating duct; It is characterized in that: be provided with the piezometric tube more than one or in this housing, this piezometric tube stretches out outside the housing, is provided with gaging hole at this piezometric tube; This housing is provided with an equalizer tank, and the input pipe of this equalizer tank is communicated with this piezometric tube by spool, and the efferent duct of this equalizer tank is communicated with differential pressure pickup by spool.
Pipeline gas pressure tester of the present invention is made up of housing, piezometric tube, spool, equalizer tank and differential pressure pickup, and its middle shell is circulating line, is inlaid in the ventilating duct; It is characterized in that: the piezometric tube that arranges in this housing is total head piezometric tube and static pressure piezometric tube, and the total head gaging hole that wherein is located on the total head piezometric tube is met airflow direction, and the total head gaging hole is positioned at the gaging hole front that is located on the static pressure piezometric tube; This housing is provided with two equalizer tanks, the input pipe of one of them equalizer tank is communicated with this total head piezometric tube by spool, the efferent duct of this equalizer tank is connected to the positive pole of differential pressure pickup by spool, the input pipe of another equalizer tank is communicated with this static pressure piezometric tube by spool, and the efferent duct of this equalizer tank is connected to the negative pole of differential pressure pickup by spool.
This pressure tester is the metering unit that is exclusively used in high-end air-conditioner control system, and sampling precision and measured value stability compared with prior art, have following advantage far above general industry pressure measurement utensil:
1, precision height
The method that measures static pressure in airduct wall boring is subject to vortes interference and can not obtains to stablize believable measured value, and the method that the piezometric tube of band survey wall aperture is set in airduct also can only obtain total head or a static pressure measured value that has approximate ratio to concern with true value, during with such measured value calculation of wind speed, all must use flow coefficient k without exception, as shown in the formula:
V-wind speed (m/s) in the formula
The k-coefficient of flow
Δ P-total head and static pressure poor, i.e. dynamic pressure (Pa)
ρ-atmospheric density (kg/m3)
Meet with sidewall and can be subjected to streaming the eddy current that produces when not attaching to its wall static pressure gaging hole of piezometric tube of air-flow and disturb, make that air-flow can't be perpendicular to static opening, thereby have to select an angle that relatively approaches to beat gaging hole, get a K value simultaneously and revise deviation.But, because the angle and the wind speed that stream have non-linear correlation, so this K value can all not be suitable under all wind speed certainly, finally cause resulting measured value to have very big nonlinearity erron inevitably.Can conclude that thus every to make pick-up unit and be known as non-calibrating with this easy means all be a kind of misleading, is not suitable for using in the air quantity air-conditioning system.
Pressure tester of the present invention has adopted unique separate type standard pitot tube mode to make, arrange homalographic cross section measuring point in strict accordance with the fluid flowing law, streamlined gauge head does not stream interference, even can not cause appreciable impact to the precision of measured value mean value in local eddy currents yet.Can accomplish to make the K=1 in the formula (1), namely
Non-linear interference needn't be considered again to the influence of measured value, directly in good time airflow value can be obtained at P L C by formula (3) programming:
In the formula: Q-air quantity (m3/h)
F-airduct sectional area (m
2)
2, good stability
Pressure tester of the present invention is the basic element of character of air quantity variable air conditioner control system, and can the stability of its measured value be the key condition that guarantee that the PLC controller control effectively to system.If the measured value instability will cause the frequency conversion commanded response time seriously to lag behind, even cause harmful concussion to cause and to restrain.This pressure tester has adopted the streamlined many gauge heads balance pipe of total cross-section structure and has all pressed shop damping buffering measure, can effectively suppress the severe impact that high velocity turbulent flow produces in the airduct random mutation pressure brings to measured value.Egg lattice flow straightening grid also is housed in the device, can combing filtering local eddy currents, improve fluidised form.The pressure output stability of this pressure tester is caliber caliber 1000 time ± 1Pa; During caliber 1000 ± and 2Pa, can satisfy the technical requirement that any high-grade control system proposes fully.
In order to understand technical purpose of the present invention, technical scheme and technique effect better, below in conjunction with accompanying drawing, the present invention is described in detail by embodiment.
Description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is side structure synoptic diagram of the present invention;
Fig. 3 is the A place enlarged drawing of Fig. 1;
Fig. 4 is the synoptic diagram of equalizer tank;
Fig. 5 is the longitudinal profile synoptic diagram of equalizer tank;
Fig. 6 is embodiment one structural drawing;
Fig. 7 is the circumferential sectional structure chart of another embodiment;
Fig. 8 is the A-A cut-open view of Fig. 7;
Fig. 9 A is the synoptic diagram of static pressure probe
Fig. 9 B is the location map of static opening;
Figure 10 is again the circumferential sectional view of an embodiment;
Figure 11 is the A-A sectional view of Figure 10;
Figure 12 A is the synoptic diagram of total head gauge head;
Figure 12 B is the location drawing of total head gaging hole;
The mounting means figure of Figure 13 practice of construction product of the present invention piezometric tube;
Figure 14 is the B place enlarged drawing of Figure 13.
In the accompanying drawing:
1-housing, 11-mounting hole, 12-steel plate ring;
2-piezometric tube, 21-static pressure piezometric tube, 22-static pressure tube head, 23-total head piezometric tube, 24-total head tube head, 25 (25 ')-deflection cone, 26-static pressure probe, 261-static opening, 262-semiellipse awl, 263-hollow tubular, 27-total head gauge head, 271-total head gaging hole;
3-spool, 31-three-way connection, 32-spool joint;
At the bottom of 4-equalizer tank, 41-input pipe, 42-efferent duct, 43-damping screen, 44-tank body, 45-tank deck, the 46-jar;
5-differential pressure pickup (claiming transmitter or converter again);
The 6-flow straightening grid;
The 7-support;
Embodiment:
As shown in Figure 1, pipeline gas pressure tester of the present invention is made up of housing 1, piezometric tube 2, spool 3, equalizer tank 4 and differential pressure pickup 5, its middle shell 1 is circular pipe, in actual engineering, the shape of housing is consistent with the shape of ventilating duct, at some in particular cases, ventilating duct can be square or other polygons, and the shape of pipeline does not influence the use of pipeline gas pressure tester of the present invention.This housing is embedded being fixed on the pipe line.Among the figure arrow be oriented to gas flow direction in the pipeline, wherein the position that enters of gas is the front, the position that gas leaves is the back.
Radially be provided with three piezometric tube 2 in this housing 1, the tube head 22 (24) of this piezometric tube 2 stretches out outside the housing 1, is provided with gaging hole at this piezometric tube 2; Be provided with a support 7 above the housing at this, equalizer tank 4 is installed on the support 7, and the input pipe 41 of this equalizer tank 4 is communicated with each piezometric tube 2 by spool 3, and the efferent duct 42 of this equalizer tank 4 is communicated with differential pressure pickup 5 by spool 3.Wherein, the spool 3 that connects from the tube head 22 (24) of each piezometric tube 2 is interconnected by three-way connection 31 again.Every spool 3 three tube heads 22 (24) in parallel form one group of pipeline, and the spool 3 of each pipeline is connected respectively on two input pipes 41 of equalizer tank 4.
As shown in Figure 3, the head of spool 3 is provided with spool joint 32, and this spool joint 32 can be connected respectively with input pipe 41 and efferent duct 42, when input pipe 41 adopts identical bore with efferent duct 42, can use the spool of identical caliber in the total system.Spool 3 preferably uses pneumatic hose, and spool joint 32 adopts existing pipeline to be connected product and connected mode with the connected mode of input pipe 41 and efferent duct 42, does not elaborate at this.
As shown in Figure 4, equalizer tank 4 is vertical right cylinders of placing, comprise by forming an airtight space in columnar tank body 44, tank deck 45 and a jar end 46, be provided with two input pipes 41 in the periphery on tank deck 45 planes, center on tank deck 45 planes is provided with efferent duct 42,46 vicinity at the bottom of this efferent duct 42 extends downward jar.
According to actual needs, can horizontal damping screen 43 be set in equalizer tank 4, as shown in Figure 5, for the synoptic diagram of damping screen 43 is set in equalizer tank 4, wherein, this efferent duct 42 passes damping screen 43, at the bottom of this extends downward jar near 46.
The efferent duct 42 of this equalizer tank 4 is communicated with differential pressure pickup 5 by spool 3.This differential pressure pickup 5 is called differential pressure pickup again, can use in the present embodiment: the DN8 turriform joint that U.S. Alpha Co., Ltd produces, model: 166P1500.Also can use the model of Tianjin Jia Nuode company production to be the differential pressure pickup of D200P1500.Perhaps use the differential pressure pickup product of other manufacturers.
As shown in Figure 6, be the structural drawing of embodiments of the invention.This embodiment ventilating duct gas pressure tester is used for the static pressure in the measuring channel.Pipeline gas pressure tester of the present invention also is made up of for the piezometric tube 2 of static pressure piezometric tube 21, spool 3, an equalizer tank 4 and a differential pressure pickup 5 housing 1, two, and its middle shell 1 is cylindrical, is inlaid in the ventilation duct diatom.The static pressure piezometric tube 21 that arranges in this housing 1 is to be the oblique placement of 45 degree, and square crossing mutually, and an end of each static pressure piezometric tube 21 stretches out the oblique upper outside the housing 1 respectively, forms the static pressure tube head 22 that is connected with spool 3; The other end of each static pressure piezometric tube 21 is separately fixed at the oblique below on the housing 1, and shutoff is towards each static pressure piezometric tube 21 outlet of oblique below.Pipe shaft at each static pressure piezometric tube 21 is provided with gaging hole 261.Such two static pressure piezometric tube 21 are respectively established a joint that connects spool 3 respectively, and namely the static pressure tube head 22.Be provided with support 7 at this housing, this equalizer tank 4 is installed on this support 7, and the effect of this support 7 is to make things convenient for the installation of equalizer tank 4.The input pipe 41 of this equalizer tank 4 is communicated with this static pressure piezometric tube 21 by spool 3, and the joint by spool 3 is connected with the static pressure tube head 22 that stretches out housing 1 particularly.Efferent duct 42 at equalizer tank 4 goes out to connect spool 3, and this spool 3 is connected on the differential pressure pickup 5.
As required, in other embodiments, also the oblique end opening of static pressure piezometric tube 21 shown in Figure 6 can be connected spool 3, and the spool 3 that static pressure piezometric tube 21 two are connected is communicated on the equalizer tank 4 by a three-way connection.
Fig. 7 and Fig. 8 are another embodiment of pipeline gas pressure tester measuring channel static pressure of the present invention, in this embodiment, the pipeline gas pressure tester also is made up of housing 1, two static pressure piezometric tube 21, spool 3, equalizer tank 4 and differential pressure pickup 5, and differential pressure pickup 5 does not mark among the figure.Two static pressure piezometric tube 21 that arrange in this housing 1 are level and vertical placements, and square crossing mutually is a deflection cone 25 at the place, point of crossing of static pressure piezometric tube 21, this deflection cone 25 axial, and namely fore-and-aft direction is the streamlined cone structure of adaptation fluid motion.The place, middle part of this deflection cone 25 establishes cross through hole radially, laterally connects as one by this cross through hole with the static pressure piezometric tube 21 of vertical placement.One end of this static pressure piezometric tube 21 stretches out the top outside the housing 1, forms a static pressure tube head 22, the below on the other end stationary housing 1, and shutoff is towards static pressure piezometric tube 21 outlets of below.One end of another static pressure piezometric tube 21 stretches out outer right-hand of housing 1, forms a static pressure tube head 22, and the other end of static pressure piezometric tube 21 is fixed on left and the shutoff of static pressure piezometric tube 21.
Pipe shaft at each static pressure piezometric tube 21 is provided with several static pressure probes 26, on every static pressure piezometric tube 21 2 to 16 static pressure probes 26 can be set as required.As shown in Figure 8, be provided with eight static pressure probes 26 at the pipe shaft of each static pressure piezometric tube 21, the shape size of each static pressure probe 26 is identical.Each static pressure probe 26 is parallel to gas flow direction, meets to the face airflow direction direction of the arrow C of the direction of air-flow such as Fig. 8 and Figure 11.Be vertically fixed on the static pressure piezometric tube 21.The front portion of static pressure probe 26 is semiellipse awl 262, this semiellipse awl 262 can be solid, the back segment of static pressure probe 26 is a hollow tubular 263, junction at semiellipse awl 262 and hollow tubular 263 is provided with several static openings 261, the static opening 261 that is arranged on each static pressure probe 26 is positioned on the same xsect S2 of housing 1, and this static opening 261 is vertical with air-flow.
Fig. 9 A is the structural representation of a static pressure probe, and Fig. 9 B is the location map of the static opening on a static pressure probe, circumferentially is evenly distributed with four static openings 261 at this static pressure probe among the figure.In other embodiments, the circumferentially even distribution static opening 261 of each static pressure probe can be different quantity, such as: circumferentially can be evenly distributed with three, five or six static openings 261 on each static pressure probe.
Static pressure piezometric tube 21 preferably adopts stainless-steel tube, and its static pressure probe also adopts the stainless steel steel.
Two static pressure piezometric tube 21 are only respectively established a joint that connects spool 3 respectively.Be provided with support 7 at this housing, this equalizer tank 4 is installed on this support 7, and the effect of this support 7 is to make things convenient for the installation of equalizer tank 4.The input pipe 41 of this equalizer tank 4 is communicated with this static pressure piezometric tube 21 by spool 3, and the joint by spool 3 is connected with the static pressure tube head 22 that stretches out housing 1 particularly.Efferent duct 42 at equalizer tank 4 goes out to connect spool 3, and this spool 3 is connected on the differential pressure pickup 5.
For fear of because the turbulent flow in the pipeline influences the precision of measuring, a flow straightening grid 6 can radially be set in the front of static pressure piezometric tube 21, this flow straightening grid 6 is perpendicular to housing 1, and its structure is egg lattice flow straightening grids, and the through hole of this grid 6 is parallel with airflow direction.
As shown in Figure 2, this pipeline gas pressure tester is made up of housing 1, piezometric tube 2, spool 2, equalizer tank 4 and differential pressure pickup 5, and piezometric tube is arranged in the housing 1, does not mark among the figure.What show in the drawings stretches out the outer tube head 22 and 24 of housing 1; Housing 1 is circulating line, is inlaid in the ventilating duct, and the both ends of the surface of housing 1 are fixedlyed connected with ventilating duct, and ventilating duct does not draw among the figure.In this housing 1, be provided with total head piezometric tube 23 and static pressure piezometric tube 21, can from Fig. 2,6,7,8 and 10, see the installation site of total head piezometric tube 23 and static pressure piezometric tube 21.Wherein be located at total head gaging hole 271 on the total head piezometric tube 23 and be positioned at the front of the static opening 261 that is located on the static pressure piezometric tube 21; This housing 1 is provided with two equalizer tanks 4, and the input pipe 41 of one of them equalizer tank 4 is communicated with this total head piezometric tube 23 by spool 3, and the efferent duct 42 of this equalizer tank 4 is connected to the positive pole of differential pressure pickup 5 by spool 3.The input pipe 41 of another equalizer tank 4 is communicated with this static pressure piezometric tube 21 by spool 3, and the efferent duct 42 of this equalizer tank 4 is connected to the negative pole of differential pressure pickup 5 by spool 3.
Figure 10 and Figure 11 are embodiment more of the present invention, be used for the dynamic pressure in the measuring channel, the disclosed embodiment difference of present embodiment and Fig. 7 and Fig. 8 is: increase by one group of total head piezometric tube again and all press filling in housing 1, two equalizer tanks 4 are fixed on the housing 1 with support 7 side by side.This embodiment is by using total head piezometric tube and static pressure piezometric tube to measure the mode of air-flow front and back two point pressure values simultaneously, measuring the dynamic pressure value in the pipeline, just pressure reduction.The embodiment that measures static pressure uses for frequency conversion fan, and blower fan comes the air quantity of variable frequency adjustment control blower fan by static pressure.The embodiment that measures dynamic pressure mainly is for surveying air quantity, drawing pressure reduction and calculate air quantity by formula again.This implements also can be used for the static pressure of other pipeline of survey, just closes the measurement of total head piezometric tube, has measured the static pressure in the pipeline exactly.
Figure 10 and shown in Figure 11, two static pressure piezometric tube 21 that arrange in this housing 1 are level and vertical placement, square crossing mutually, place, point of crossing at static pressure piezometric tube 21 is a deflection cone 25 ', the circumferential streamline structure for the adaptation fluid motion of this deflection cone 25 ', axial front and back along this deflection cone 25 ' arrange two cross through holes radially, and these two cross-holes are spaced from each other.Just the deflection cone 25 ' at place, static pressure piezometric tube 21 point of crossing extands rearward to the place, point of crossing of total head piezometric tube 23, and this point of crossing is circumferentially to be cross through hole, and the total head piezometric tube 23 of oblique placement connects as one by this cross through hole.Cross through hole at the cross through hole of the deflection cone 25 ' on the static pressure piezometric tube 21 and the deflection cone 25 ' on total head piezometric tube 23 is to separate mutually.
One of them cross-hole laterally with vertical placement, static pressure piezometric tube 21 connects as one by this cross through hole.One end of this static pressure piezometric tube 21 stretches out housing 1 outer top and forms static pressure tube head 22, the below on the other end stationary housing 1, and shutoff is towards static pressure piezometric tube 21 outlets of below.One end of another static pressure piezometric tube 21 stretches out outer right-hand of housing 1, forms static pressure tube head 22, and the other end is fixed on left and the shutoff of static pressure piezometric tube 21.
Pipe shaft at each static pressure piezometric tube 21 is provided with 8 static pressure probes 26, and the shape size of each static pressure probe 26 is identical.Each static pressure probe 26 is provided with several static openings 261, and each static opening 261 is positioned on the same cross section.
Two static pressure piezometric tube 21 connect spools 3 by its static pressure tube head 22 respectively, and are connected to the input pipe 41 of an equalizer tank 4 by spool 3, are connected on the negative pole of differential pressure pickup 5 air pressure input interfaces by spool 3 at the efferent duct 42 of equalizer tank 4.
Two total head piezometric tube 23 are set in this housing 1 in addition, this total head piezometric tube 23 is to be the oblique placement of 45 degree, and square crossing is placed mutually, axially goes up another cross-hole that arranges along deflection cone 25 ' and is the oblique placement of 45 degree, and total head piezometric tube 23 connects as one by this cross through hole.One end of each total head piezometric tube 23 stretches out the oblique upper outside the housing 1 respectively, forms the joint that is connected with spool 3; The other end of each total head piezometric tube 23 is separately fixed at the oblique below on the housing 1, and shutoff is towards each total head piezometric tube 23 outlet of oblique below.Be provided with the total head gauge head 27 of some vertical piezometric tube at the pipe shaft of each total head piezometric tube 23, the structure of total head gauge head 27 is shown in Figure 12 A and Figure 12 B, total head gauge head 27 is vertically fixed on the pipe shaft of total head piezometric tube 23, this pressure-measuring head 27 is met airflow direction, is provided with total head gaging hole 271 at this total head pressure-measuring head top.Pipe shaft at every total head piezometric tube 23 is provided with 8 total head gauge heads 27, and the shape size of each total head gauge head 27 is identical.The top of total head gauge head 27 is provided with a total head gaging hole 271, and total head gaging hole 271 is met the direction to air-flow.Total head gaging hole 271 is positioned on the same cross section.
Such two total head piezometric tube 23 are established a joint that connects spool 3 respectively.The input pipe 41 of another equalizer tank 4 is communicated with the total head tube head 24 of this total head piezometric tube 23 by spool 3.Efferent duct 42 places at this equalizer tank 4 connect spool 3, and this spool 3 is connected on the positive pole of differential pressure pickup 5 air pressure input interfaces.
This total head piezometric tube 23 preferably adopts stainless-steel tube.
As shown in figure 11, each total head gaging hole 271 is positioned on the xsect S1, each static pressure is surveyed the place, point of crossing that the deflection cone of locating in static pressure piezometric tube 21 point of crossing 25 ' extands rearward to total head piezometric tube 23, this point of crossing is circumferentially to be cross through hole, and the total head piezometric tube 23 of oblique placement connects as one by this cross through hole.Cross through hole at the cross through hole of the deflection cone 25 ' on the static pressure piezometric tube 21 and the deflection cone 25 ' on total head piezometric tube 23 is to separate mutually.Hole 261 is positioned on the section S 2, and the total head gaging hole 271 of total head piezometric tube 23 is positioned at the front of the static opening 261 of pressing quiet piezometric tube 21.In the present embodiment, although total head piezometric tube 23 is positioned at the back of quiet piezometric tube 21, owing to the total head gauge head 27 that is fixed on total head piezometric tube 23 is longer, before this total head gauge head 27 protrudes out the plane at static opening 261 places forward.
In other embodiment, total head piezometric tube 23 is placed on the front of quiet piezometric tube 21, like this, when the length of the length of total head gauge head 27 and static pressure probe 26 is identical, before the plane at this total head gaging hole place also can be positioned at the plane at static opening 261 places.
Pressure measurement mode of the present invention is the streamlined many gauge heads balance pipe of total cross-section formula.Meet the requirement of standard GB/T1236-2000 fully.
1, suitable conduit size: the circular and rectangular air duct specification of whole basic series of regulation in " ventilating duct technical regulation JGJ141-2004 ".
2, be suitable for wind speed: 2～30m/s
3, full scale precision: 1.5%
4, repeat deviation: ± 1%
5, pressure output stability: during caliber 1000 ± 1Pa
During caliber 1000 ± 2Pa
6, Applicable media: the air that does not contain particle dust
7, Applicable temperature :-50～300 ℃
8, air pressure out splice going splice: ￠ 8 air hose street joints (specifying when goods is ordered goods)
9, with the airduct connected mode: inner bulge core duct, flange (specifying when goods is ordered goods)
10, material: piezometric tube 304 stainless steel bodies, 304 stainless steels or carbon steel
Shown in Figure 14 as Figure 13 and Tu, in actual product, a kind of fixed form of piezometric tube 2, piezometric tube 2 comprises total head piezometric tube 23 and static pressure piezometric tube 21.Band step steel plate ring 12 is fixedly welded in the housing 1, piezometric tube 2 is fixed on steel plate ring 12 by dormant screw, the total head tube head 24 of total head piezometric tube 23 and static pressure piezometric tube 21 and static pressure tube head 22 stretch out outside the housing 1 by the mounting hole 11 at housing 1, in order to be communicated with spool 3.Connect the spool of each piezometric tube 2 and each balance pipe 4, and the pipeline that connects each equalizer tank 4 and each differential pressure pickup 5, all be called pipeline 3, pipeline 3 according to actual needs can be with the pipeline of different-diameter or material.
Claims (10)
1. a pipeline gas pressure tester is made up of housing (1), piezometric tube (2), spool (3), equalizer tank (4) and differential pressure pickup (5), and housing (1) is inlaid on the ventilation duct diatom; It is characterized in that: radially be provided with the piezometric tube (2) more than one or in this housing (1), this piezometric tube (2) stretches out outside the housing, is provided with some gaging holes at this piezometric tube; This housing is provided with one or more equalizer tank (4), and the input pipe (41) of this equalizer tank (4) is communicated with this piezometric tube (21) by spool (3), and the efferent duct (42) of this equalizer tank (4) is communicated with (5) by spool (3) with differential pressure pickup.
2. pipeline gas pressure tester according to claim 1, it is characterized in that: the piezometric tube that arranges in this housing is static pressure piezometric tube (21), this housing (1) is provided with an equalizer tank (4), the input pipe of this equalizer tank is communicated with this piezometric tube (21) by spool (3), and the efferent duct (42) of this equalizer tank (4) is communicated with differential pressure pickup (5) by spool.
3. pipeline gas pressure tester according to claim 2, it is characterized in that: the pipe shaft at this static pressure piezometric tube (21) is provided with static pressure probe (26), and this static pressure probe (26) is parallel to gas flow direction, is vertically fixed on the static pressure piezometric tube (21); Same xsect at static pressure probe (26) is provided with static opening (261), and static opening (261) is communicated with this static pressure piezometric tube (21).
4. pipeline gas pressure tester according to claim 3, it is characterized in that: the static pressure piezometric tube (21) of two mutual square crossings that in this housing (1), arrange, place, point of crossing at static pressure piezometric tube (21) is a deflection cone (25), the place, axial middle part of this deflection cone (25), be provided with cross through hole radially, the vertical static pressure piezometric tube of placing (21) connects as one by this cross through hole.
5. pipeline gas pressure tester according to claim 4, it is characterized in that: the pipe shaft at each static pressure piezometric tube (21) is provided with eight static pressure probes (26), circumferentially can be evenly distributed with three, four, five or six static openings (261) on each static pressure probe.
6. pipeline gas pressure tester according to claim 1, it is characterized in that: the piezometric tube (2) that arranges in this housing (1) is total head piezometric tube (23) and static pressure piezometric tube (21), the total head gaging hole that wherein is located on the total head piezometric tube (23) is met airflow direction, is arranged on static opening on the static pressure piezometric tube (21) perpendicular to the direction of air-flow; The residing xsect of total head gaging hole is positioned at the front of the residing xsect of static opening; This housing is provided with two equalizer tanks (4), the input pipe (41) of one of them equalizer tank (4) is communicated with this total head piezometric tube (23) by spool, the efferent duct (42) of this equalizer tank (4) is connected to the positive pole of differential pressure pickup (5) by spool, the input pipe (41) of another equalizer tank (4) is communicated with this static pressure piezometric tube (11) by spool, and the efferent duct (42) of this equalizer tank (4) is connected to the negative pole of differential pressure pickup (5) by spool.
7. pipeline gas pressure tester according to claim 6, it is characterized in that: the pipe shaft at this static pressure piezometric tube (21) is provided with static pressure probe (26), this static pressure probe (26) is parallel to gas flow direction, be vertically fixed on the static pressure piezometric tube (21), the same xsect of static pressure probe (26) is provided with static opening (261), and static opening (261) is communicated with this static pressure piezometric tube (21); Vertical fixing has total head gauge head (27) on the pipe shaft of total head piezometric tube (23), and this pressure-measuring head (27) is met airflow direction, is provided with total head gaging hole (271) at this total head pressure-measuring head (27) top.
8. pipeline gas pressure tester according to claim 7, it is characterized in that: the place, point of crossing at static pressure piezometric tube (21) is a deflection cone (25 '), the circumferential streamline structure for the adaptation fluid motion of this deflection cone (25 '), axial front and back along this deflection cone (25 ') arrange two cross through holes radially, and these two cross-holes are spaced from each other; One of them cross-hole laterally with vertical placement, static pressure piezometric tube (21) connects as one by this cross through hole; Total head piezometric tube (23) is to be the oblique placement of 45 degree, and square crossing mutually, axially goes up another cross-hole that arranges along deflection cone (25 ') and is the oblique placement of 45 degree, and total head piezometric tube (23) connects as one by this cross through hole.
9. according to claim 1,2,3,4,5,6,7 or 8 described pipeline gas pressure tester, it is characterized in that: be provided with support (7) at this housing, this equalizer tank (4) is installed on this support (7).
10. according to claim 1,2,3,4,5,6,7 or 8 described pipeline gas pressure tester, it is characterized in that: in the front of piezometric tube (2) flow straightening grid (6) is set, this flow straightening grid (6) is perpendicular to housing 1, this grid (6) is egg lattice flow straightening grids, and the through hole of grid is parallel with airflow direction.
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| CN108469283A (en) * | 2018-05-24 | 2018-08-31 | 华北电力大学 | The axial flow blower flow measurement device and method of principle are sensed based on hot line wind speed |
| CN108709576A (en) * | 2018-06-05 | 2018-10-26 | 中国航发沈阳发动机研究所 | A kind of rake instrument |
| CN108896121A (en) * | 2018-06-08 | 2018-11-27 | 华北电力大学 | A kind of axial flow blower flow measurement device based on cross probe |
| CN111380145A (en) * | 2020-03-19 | 2020-07-07 | 中国建筑科学研究院有限公司 | Fresh air quantity real-time monitoring method for fresh air machine |
| CN114323424A (en) * | 2021-12-13 | 2022-04-12 | 潍柴动力股份有限公司 | Dynamic responsiveness detection method and device, electronic device and storage medium |
| CN114323424B (en) * | 2021-12-13 | 2023-09-19 | 潍柴动力股份有限公司 | Dynamic response detection method and device, electronic equipment and storage medium |
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| CN114593863A (en) * | 2022-02-28 | 2022-06-07 | 英飞同仁风机股份有限公司 | Pitot tube for measuring average pressure |
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Address after: 214500 No. 15 south mountain road, Chengbei Industrial Zone, Jiangsu, Jingjiang Applicant after: JIANGSU ANBANG WEIYE ARTIFICIAL ENVIRONMENT Co.,Ltd. Address before: 214500 No. 15 south mountain road, Chengbei Industrial Zone, Jiangsu, Jinjiang Applicant before: JIANGSU ANBANG WEIYE ARTIFICIAL ENVIRONMENT Co.,Ltd. |
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Address after: No. 15 Shannan Road, Chengbei Industrial Park, Jingjiang City, Jiangsu Province, 214500 Patentee after: Jiangsu Anbang Weiye Equipment Group Co.,Ltd. Address before: No. 15 Shannan Road, Chengbei Industrial Park, Jingjiang City, Jiangsu Province, 214500 Patentee before: JIANGSU ANBANG WEIYE ARTIFICIAL ENVIRONMENT Co.,Ltd. |