CN201016759Y - Plug-in combined type multi-point orifice throttling device - Google Patents
Plug-in combined type multi-point orifice throttling device Download PDFInfo
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- CN201016759Y CN201016759Y CNU2006201358471U CN200620135847U CN201016759Y CN 201016759 Y CN201016759 Y CN 201016759Y CN U2006201358471 U CNU2006201358471 U CN U2006201358471U CN 200620135847 U CN200620135847 U CN 200620135847U CN 201016759 Y CN201016759 Y CN 201016759Y
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Abstract
An inserted combined multi-measuring point perforated plate throttling device used for measuring flow of middle, large and super large pipes; a fixed flange is welded on the pipe; a movable flange is compressed and connected with the fixed flange by a screw; the upper end of the movable flange is equipped with a height pressure tapping conduit joint and the lower end is connected with a plurality of cantilever brackets and measuring perforated plates up and down in series; in this way, the device is formed; the device is inserted into a plurality of measuring points within the average flow velocity range for multi-measuring point measurement; the measuring perforated plate consists of an inlet perforated plate or a nozzle, a front straight pipe section, an accelerating perforated plate or a nozzle, a middle straight pipe section, a detecting perforated plate and a back straight pipe; the device is widely used for measuring fluid flow under various complicated working conditions.
Description
Affiliated technical field:
The utility model relates to a kind of middle large pipeline, the insertion combined type multi-measuring point throttle orifice plate apparatus of especially big pipeline fluid flow measurement.
Background technology:
At present, industrial fluids flow measurement, the measurement of middle large pipeline, especially big pipeline fluid flow, adopt IGWC plug-in type Venturi tube, insert the combined type orifice plate, nozzle, Venturi nozzle and plug-in type even speed tube etc. are used for the measurement of large pipeline, especially big pipeline gas, water or other fluid.They also have problems and shortcoming in actual use.1, nozzle, Venturi nozzle, the shortcoming of Venturi tube: (1) inserts the single-point local measurement in the pipeline mean flow rate scope.When (2) there are choked flow pieces such as elbow valve the measuring point upstream under the situation of working condition more complicated, be easy to generate some errors.2, average rate tubing: the long-pending little nothing of (1) fluoran stream surface attracts diversion function.(2) the high-low pressure pressure port stops up (3) no differential pressure signal amplifying function easily, can not well detect under the low flow condition, and the differential pressure of measuring is less, causes bigger measuring error easily.
Summary of the invention:
For overcoming plug-in type Venturi tube, orifice plate, nozzle, Venturi nozzle class restriction device and the plug-in type average rate tubing measurement mechanism above-mentioned deficiency aspect middle large pipeline, especially big pipeline fluid flow measurement, the utility model provides a kind of this restriction device of insertion combined type multi-measuring point throttle orifice plate apparatus can be widely used in middle large pipeline under the various more complicated working conditions, the measurement of especially big pipeline fluid flow mainly solves following technical matters; 1, inserts the interior single-point local measurement of pipeline mean flow rate scope.2, when there are choked flow pieces such as elbow valve the measuring point upstream under the situation of working condition more complicated, be easy to generate some errors.3, the high-low pressure pressure port blocks easily.4, the long-pending little nothing of fluoran stream surface attracts diversion function.5, no differential pressure signal amplifying function, the differential pressure of measuring under the low flow condition is less, causes bigger measuring error easily.
The technical scheme that its technical matters that solves the utility model adopts is: adopt some measuring diaphragms of some pole bracket tandem compounds to insert in the scope of pipeline mean flow rate, mounting flange (2) lower end is welded on the pipeline (1), have the hole on it, loose flange (6) is fastened on the mounting flange (2) with screw (3).Mounting flange (2) upper end groove (4) matches with loose flange (6) lower end boss (7), and the centre is added with pad (5), and flange adopts concaveconvex structure, to guarantee that flange seal is tight up and down, prevents to leak, and guarantees that again installing and locating is accurate, and is simple and convenient.Prevent to install and fix dislocation and shake produced loosening.There are high-end pressure catheter interface (9), low side pressure catheter interface (10) in loose flange (6) upper end, connect high low side pressure measuring valve door, pressure unit and differential pressure transmitter with convenience.Loose flange (6) lower end is connected with pole bracket one (12) upper end, high-end pressure conduit one (13) is arranged in the pole bracket one (12), one (14) 1 pair of pressure conduit of low side pressure conduit passes through, and 1 pair of high low side pressure conduit upper end is connected with the high low side pressure of the 1 couple interface (8) (11) of loose flange (6) respectively.1 pair of high low side pressure conduit lower end is connected with the pressure interface (21) (23) of L6 section to one (24) 1 pair of upper end of ring casing, preceding ring casing one (22) back of L8 section measuring diaphragm one upper end respectively, and pole bracket one (12) lower end is connected with measuring diaphragm one L3 section to L9 section upper end.Pole bracket two (30) upper ends are connected with measuring diaphragm one L3 section to L9 section lower end, high-end pressure conduit two (33) is arranged in the pole bracket two (30), two (31) 1 pairs of pressure conduits of low side pressure conduit pass through, the upper end of 1 pair of high low side pressure conduit is connected with 1 pair of pressure interface (32) (29) of L6 section to ring casing one (24) lower end, preceding ring casing one (22) back of L8 section measuring diaphragm one lower end respectively, the 1 pair of high low side pressure conduit lower end respectively with the preceding ring casing two (40) of L6 to section L8 section measuring diaphragm two upper ends, back ring casing two (43), the pressure interface (41) (42) of 1 pair of upper end is connected.Pole bracket two (30) lower ends are connected with the upper end of measuring diaphragm two L3 sections to the L9 section, pole bracket three (49) upper ends are connected with the lower end of measuring diaphragm two L3 sections to the L9 section, have high-end pressure conduit three (52), three (50) 1 pairs of pressure conduits of low side pressure conduit to pass through in the pole bracket three (49).The upper end of 1 pair of high low side pressure conduit is connected to the pressure interface (51) (48) of two (43) 1 pairs of lower ends of ring casings, preceding ring casing two (40) back of section L8 section measuring diaphragm two lower ends with L6 respectively.The lower end of 1 pair of high low side pressure conduit is connected to the pressure interface (60) (61) of three (62) 1 pairs of upper ends of ring casings, preceding ring casing three (59) back of section L8 section measuring diaphragm three upper ends with L6 respectively, pole bracket three (49) lower ends are connected with the upper end of measuring diaphragm three L3 sections to the L9 section, cantilever fixed support tube four (67) upper ends are connected with the lower end of measuring diaphragm three L3 section L9 sections, cantilever fixed support tube four (67) lower ends are passed the pipeline lower wall and are connected with fixed support upper flange (68), fixed support lower flange (69), the centre is added with pad (70) lower flange on the fastening fixed support of screw (71), to guarantee that flange seal is tight up and down, prevent to leak.
Insert and adopt many cantilever fixed sturctures in the pipeline, many stability and the soundnesses that measuring diaphragm is cascaded have been guaranteed greatly from top to bottom, guarantee the consistance of vertical and horizontal axis vertical with pipeline of many measuring diaphragms simultaneously, deviation does not take place with horizontal axis.Effectively prevent many measuring diaphragm swings and skew, and effectively protect the pressure conduit not by fluid scouring.
Measuring diaphragm one, two to N measuring diaphragm outer mold surface of measuring diaphragm; Be smooth column type, profile in the measuring diaphragm: by the measurement mechanism that the structure that produces differential pressure signal is formed is set in the measuring tube, L1 section inlet hole plate or nozzle are taper shape or arc-shaped surface, L2 section inlet hole plate or nozzle throat are smooth cylindrical shape, straight tube is the smooth face of cylinder before the L3 section, the L4 section is taper shape or arc-shaped surface for quickening orifice plate or nozzle, the L5 section is that straight length is that smooth face of cylinder L7 section is a coned face for detecting orifice plate in the smooth cylindrical shape L6 section for quickening orifice plate or nozzle throat, the L8 section is smooth cylindrical shape for detecting orifice plate throat, straight length is smooth cylindrical surface after the L9 section, detects orifice plate and adopts throat's pressure structure.L1 section inlet hole plate or nozzle convection cell have the attraction guide functions, the fluid contraction distortion, fluid enters inlet hole plate or nozzle, when flowing through L2 section inlet hole plate or nozzle throat, fluid velocity once increases, and mean flow rate reaches and once quickens maximal value, current stabilization of straight length before the L3 section, effectively solve smooth unstable, change big problem, fluid is tended towards stability, the L4 section is for quickening orifice plate or nozzle, fluid enters when quickening orifice plate or nozzle, when drawdown deformation, fluid secondary accelerated to L5 section acceleration orifice plate or nozzle throat, mean flow rate reached secondary and quickens maximal value, straight length secondary current stabilization in the L6 section, the L7 section is for detecting orifice plate, and fluid enters when detecting orifice plate, drawdown deformation again, fluid quickens for three times, when detecting orifice plate throat to the L8 section, mean flow rate reaches the maximal value of quickening for the third time, has the effect of repeatedly differential pressure signal being amplified.The straight length convection cell carries out diffusion after the L9 section, and flow velocity is slowed down, and the pressure recovery also has the current stabilization effect.Some measuring diaphragms, be inserted on the different measuring points in the pipeline mean flow rate scope, the signal of measuring is all pressed through the front and back of each measuring diaphragm ring casing, be transferred to by high low side pressure pipe separately in the front and back ring casing of a last measuring diaphragm and all press, be transferred to the front and back ring casing of first measuring diaphragm at last, all press again through the front and back ring casing, measure flow in the large pipeline mean flow rate scope accurately, measurement accuracy and precision have been improved, the measuring error of effectively avoiding fluid to distribute and distort and brought, for middle large pipeline, the pressure loss of restriction device is very little in the especially big pipeline flow field, tubular stinger.When adopting two point to measure, for inserting the two measuring point throttle orifice plate apparatus of combined type, when adopting some point measurements, for inserting combined type multi-measuring point throttle orifice plate apparatus.
The technical solution adopted in the utility model comprises following technical parameter, inlet hole plate nozzle inside diameter D=20-200 millimeter, quicken orifice plate nozzle β value=d/D=0.2～0.8, detect orifice plate β value=d/D=0.2～0.8, detect orifice plate thickness d=1-5, detect orifice plate throat length L=0.2d-2d, preceding flow development length L=0.5-5D, middle flow development length L=0.5-3D, back flow development length L-0.2～2D, measuring diaphragm total length L=2-10D, first measuring diaphragm and last measuring diaphragm distance be tube wall distance L=0.242R up and down.
The beneficial effects of the utility model are: 1; adopt to insert many pole brackets structure that is connected in series; some measuring diaphragms have been guaranteed greatly; the stability of being connected in series and soundness; guaranteed that some measuring diaphragms are vertical all the time with conduit axis and parallel; effectively prevent the measuring error that some measuring diaphragm swings and skew bring; again the pressure conduit is played a protective role 2; adopt two flanges double fixed structures up and down; it is oversize effectively to solve a plurality of cantilevers of insertion; rigidity is poor; strengthen the rigidity of a plurality of pole brackets greatly; further play firm effect, prevent leakage and the inaccurate error of bringing of installing and locating that flange seal does not sternly produce simultaneously.3, profile in the measuring diaphragm adopts the taper shape that repeatedly shrinks, and the arc-shaped surface structure has the multiple signal enlarging function.Detect orifice plate and adopt throat's pressure structure, improved differential pressure range scope and differential pressure value, especially under the working condition of low flow velocity normal pressure, also can accurately measure higher differential pressure.4, inlet hole plate or nozzle adopt conical, the arc-shaped surface structure, it is long-pending to have increased the inlet fluoran stream surface, incoming flow had attract guide functions preferably, inlet hole plate or the once accelerating effect of nozzle convection cell, preceding once current stabilization effect of straight length convection cell, quicken orifice plate or nozzle convection cell and have the secondary accelerating effect, middle straight section convection cell has the effect of secondary current stabilization, detect the orifice plate convection cell and have accelerating effect for the third time, accurately measure than higher differential pressure signal, back straight length has diffusion and current stabilization effect, pressure is recovered, and flow velocity slows down.Overcome the average rate tubing and measured pipe, square and rectangular pipe road, under the complex working condition condition, differential pressure signal is little, causes bigger measuring error easily, under low flow rate conditions, and the differential pressure that can not measure sometimes, the difficult point of fluid measurement.5, adopt some measuring diaphragms to be cascaded, in to pipeline mean flow rate scope, the measurement of some measuring point fluids, correctly measure flow in the pipeline really, accuracy and the accuracy measured have been improved, especially under the working condition of complexity, fluid produced distortion when there was choked flow piece such as elbow valve the upstream, also can accurately measure.Overcome the single-point local measurement under pipe, square and rectangular pipe road complex working condition condition, the difficult point that the single-point partial fluid is measured has realized the accurate measurement in the mean flow rate scope in middle large pipeline, the especially big pipeline.6, adopt some measuring diaphragm multimeterings, under the bigger situation of fluid dust, utilize the kinetic energy of fluid to remove the function that falls into dust in the measuring diaphragm automatically, overcome the difficult point that average rate tubing height pressure port blocks easily, prevent that effectively dust from blocking the high-low pressure pressure port, improved accuracy and the accuracy measured.
Description of drawings:
Embodiment further specifies the utility model below in conjunction with accompanying drawing.
Fig. 1 inserts combined type multi-measuring point throttle orifice plate apparatus vertical section structure figure.
Fig. 2 inserts the two measuring point throttle orifice plate apparatus vertical section structure figure of combined type.
Fig. 3 is the measuring diaphragm sectional structure chart.
Fig. 4 is the mounting flange sectional structure chart.
Fig. 4 is the mounting flange structural representation.
Fig. 6 is the loose flange sectional structure chart.
Fig. 7 is the loose flange structural representation.
Fig. 8 is the pole bracket sectional structure chart.
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Embodiment:
In the embodiment shown in fig. 1: insert combined type multi-measuring point throttle orifice plate apparatus, from the mounting flange hole, be inserted into the middle large pipeline of sealing, in the scope of especially big pipeline mean flow rate, many measuring diaphragms aim at flow path direction, first measuring diaphragm is below pipeline upper wall 0.242R, last measuring diaphragm is apart from more than the pipeline lower wall 0.242R, mounting flange (2), as shown in Figure 1, the lower end is welded on the pipeline (1), have the hole on it, loose flange (6) is fastened on the mounting flange (2) with screw (3).Mounting flange upper end groove (4) matches with loose flange (6) lower end boss (7), and the centre is added with pad (5).Flange adopts concaveconvex structure, as Fig. 1, to guarantee that flange seal is tight up and down, prevents to leak shown in 4, guarantees that again installing and locating is accurate, and is simple and convenient.Prevent to install and fix dislocation and shake produced loosening.Loose flange (6) as shown in Figure 1, there are high-end pressure catheter interface (9), low side impulse catheter interface (10) in the upper end, with convenient high low side pressure measuring valve door, pressure unit and the differential pressure transmitter of connecting.Loose flange (6) as shown in Figure 1, the lower end is connected with pole bracket one (12) upper end, pole bracket one (12) is as Fig. 1, shown in 5, in high-end pressure conduit one (13) is arranged, one (14) 1 pair of pressure conduit of low side pressure conduit passes through, and 1 pair of high low side pressure conduit upper end is connected with the high low side pressure of the 1 couple interface (8) (11) of loose flange (6) respectively.The 1 pair of high low side pressure conduit lower end respectively with the L6 section to the L8 section, as Fig. 1, shown in 3, the pressure interface (21) (23) of one (24) 1 pair of upper end of ring casing, preceding ring casing one (22) back of measuring diaphragm one upper end is connected, pole bracket one (12) as shown in Figure 1, lower end and measuring diaphragm one L3 section are to the L9 section, as Fig. 1, shown in 3, the upper end is connected.Pole bracket two (30) as shown in Figure 1, upper end and measuring diaphragm one L3 section are to the L9 section, as Fig. 1, shown in 3, the lower end is connected, pole bracket two (30) is as Fig. 1, shown in 5, in high-end pressure conduit two (33) is arranged, two (31) 1 pairs of pressure conduits of low side pressure conduit pass through, the upper end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, as Fig. 1, shown in 3,1 pair of pressure interface (32) (29) of ring casing one (24) lower end, preceding ring casing one (22) back of measuring diaphragm one lower end is connected, the 1 pair of high low side pressure conduit lower end respectively with the L6 section to the L8 section, as Fig. 1, shown in 3, the preceding ring casing two (40) of measuring diaphragm two upper ends, back ring casing two (43), the pressure interface (41) (42) of 1 pair of upper end is connected.Pole bracket two (30) as shown in Figure 1, lower end and measuring diaphragm two L3 sections are to the L9 section, as Fig. 1, shown in 3, the upper end is connected, pole bracket three (49) as shown in Figure 1, upper end and measuring diaphragm two L3 sections are to the L9 section, as Fig. 1, the lower end is connected shown in 3, pole bracket three (49) is as Fig. 1, shown in 5, in high-end pressure conduit three (52) is arranged, three (50) 1 pairs of pressure conduits of low side pressure conduit pass through, to the upper end of high low side pressure conduit respectively with the L6 section to the L8 section, as Fig. 1, shown in 3, the pressure interface (51) (48) of two (43) 1 pairs of lower ends of ring casing, preceding ring casing two (40) back of measuring diaphragm two lower ends is connected, the lower end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, as Fig. 1, shown in 3, the pressure interface (60) (61) of three (62) 1 pairs of upper ends of ring casings, preceding ring casing three (59) back of measuring diaphragm three upper ends is connected, pole bracket three (49) as shown in Figure 1, lower end and measuring diaphragm three L3 sections are to the L9 section, as Fig. 1, shown in 3, the upper end is connected, and cantilever fixed support tube four (67) as shown in Figure 1, upper end and measuring diaphragm three L3 sections are to the L9 section, as shown in Figure 1, the lower end is connected, and cantilever fixed support tube four (67) lower ends are passed the pipeline lower wall and are connected with fixed support upper flange (68), fixed support lower flange (69), be added with pad (70) as shown in Figure 1 with lower flange on the fastening fixed support of screw (71),, prevent to leak to guarantee that flange seal is tight up and down.Pole bracket one to some as Fig. 1, shown in 5, it is streamlined or plate that fluoran stream surface is, measuring diaphragm one to some as Fig. 1, shown in 3, outer mold surface is smooth circular arc type, interior profile, as Fig. 1, shown in 3, L1 section inlet hole plate nozzle (15) (34) (53) is taper shape or arc-shaped surface structure, incoming flow there is stronger attraction guide functions, make fluid can flow in orifice plate or the nozzle smoothly, the fluid contraction distortion, inlet hole plate or nozzle throat (16) (35) (54) fluid velocity inside increases, have amplification of differential pressure signal, straight length (17) (36) (55) is smooth column type before the L3 section, current stabilization of convection cell, the L4 section is quickened orifice plate or the interior profile of nozzle (18) (37) (56), as Fig. 1, shown in 3, be taper shape or arc-shaped surface structure, fluid enters the L4 section and quickens orifice plate or the drawdown deformation of nozzle (18) (37) (56) fluid secondary, the L5 section is quickened orifice plate or nozzle throat (19) (38) (57) fluid velocity inside further increases, have the effect that differential pressure signal is amplified for the second time, straight length in the L6 section (20) (39) (58) is smooth column type, convection cell secondary current stabilization, the L7 section detects the interior profile of orifice plate (27) (47) (66), as Fig. 1, shown in 3, be conical structure, fluid flows into the L7 section and detects orifice plate (27) (47) (66) drawdown deformation for the third time, detecting orifice plate throat (26) (45) (57) in the L8 section is smooth cylinder type, and it is maximum that throat's inner fluid average velocity reaches, and has the effect of for the third time differential pressure signal being amplified, straight length after the L9 section (28) (46) (65) is smooth column type, convection cell carries out diffusion, and fluid velocity is slowed down, and pressure recovers.The L6 section is to the L8 section, as Fig. 1, shown in 3, several preceding ring casings (21) (40) (59), back ring casing (24) (43) (62), taking out the static pressure of upstream and the dynamic pressure in downstream simultaneously all presses at ring casing separately, the bottom-up upstream high-end pressure conduit N that passes through separately, downstream low side pressure conduit N is transferred to upper level measuring point measuring diaphragm front and back ring casing N with pressure signal, the pressure signal of measuring with the upper level measuring point mixes all at separately ring casing jointly presses, pass through upstream high-end pressure conduit N separately again, downstream low side pressure conduit N is transferred to pressure signal again the measuring diaphragm front and back ring casing N of upper level measuring point, mix all at separately ring casing jointly with the pressure signal of measuring of this one-level measuring point and to press, high-end pressure conduit N by this measuring point, low side pressure conduit N is transferred to pressure signal again before and after the measuring diaphragm of upper level measuring point more in the ring casing with pressure signal that this one-level measuring point is measured and further mixes all pressures jointly again in ring casing.Mix equal step by step straightening so step by step to the front and back ring casing that is transferred to first measuring diaphragm, pressure signal further mixes in ring casing all jointly more for the last time presses, through high low side impulse catheter interface (9) (10) differential pressure signal is transported to differential pressure transmitter by high low side pressure conduit one (13) (14), by the accurate measurement of multi-measuring point step by step, measure middle large pipeline accurately, the flow of especially big pipeline inner fluid.
In embodiment illustrated in fig. 2: insert the two measuring point throttle orifice plate apparatus of combined type, from the mounting flange hole, be inserted into the middle large pipeline of sealing, in the scope of the interior mean flow rate of especially big pipeline, the inlet nozzle of 2 measuring diaphragms aims at flow path direction, first measuring diaphragm is inserted in the following scope of pipeline upper wall 0.242R, second measuring diaphragm is inserted under the pipeline in the above scope of upper wall 0.242R, mounting flange (2), as shown in Figure 2, the lower end is welded on the pipeline (1), have the hole on it, loose flange (6) is fastened on the mounting flange (2) with screw (3).Mounting flange upper end groove (4) matches with loose flange (6) lower end boss (7), and the centre is added with pad (5), and flange adopts concaveconvex structure, as Fig. 2, to guarantee that flange seal is tight up and down, prevents to leak shown in 4, guarantees that again installing and locating is accurate, and is simple and convenient.Prevent to install and fix dislocation and shake produced loosening.Loose flange (6) as shown in Figure 2, there is high-end pressure catheter interface (9) upper end, low side impulse catheter interface (10), with the high low side pressure measuring valve door of convenient connection, pressure unit and differential pressure transmitter, loose flange (6) as shown in Figure 2, lower end and pole bracket one (12) are as shown in Figure 2, the upper end is connected, pole bracket one (12) is as Fig. 2, shown in 5, in high-end pressure conduit one (13) is arranged, one (14) 1 pair of pressure conduit of low side pressure conduit passes through, and 1 pair of high low side pressure conduit upper end is connected with the high low side pressure of the 1 couple interface (8) (11) of loose flange (6) respectively.The 1 pair of high low side pressure conduit lower end respectively with the L6 section to L8 section such as Fig. 2, shown in 3, the pressure interface (21) (23) of one (24) 1 pair of upper end of ring casing, preceding ring casing one (22) back of measuring diaphragm one upper end is connected, pole bracket one (12) as shown in Figure 2, lower end and measuring diaphragm one L3 section are to the L9 section, as Fig. 2, shown in 3, the upper end is connected, pole bracket two (30) upper ends and measuring diaphragm one L3 section L9 section, as Fig. 2, shown in 3, the lower end is connected, and pole bracket two (30) is as Fig. 2, shown in 5, in high-end pressure conduit two (33) is arranged, two (31) 1 pairs of pressure conduits of low side pressure conduit pass through, the upper end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, as Fig. 2, shown in 3,1 pair of pressure interface (32) (29) of ring casing one (24) lower end, the preceding ring casing of measuring diaphragm one lower end one (22) back is connected, the 1 pair of high low side pressure conduit lower end respectively with the L6 section to the L8 section, as Fig. 2, shown in 3, the preceding ring casing two (40) of measuring diaphragm two upper ends, back ring casing two (43), the pressure interface (41) (42) of 1 pair of upper end is connected, pole bracket two (30) as shown in Figure 2, lower end and measuring diaphragm two L3 sections are to the L9 section, as Fig. 1, shown in 3, the upper end is connected.Pole bracket one, two, as Fig. 2, shown in 5, it is streamlined or plate that fluoran stream surface is, measuring diaphragm one, two as Fig. 2, shown in 3, outer mold surface is smooth circular arc type, interior profile such as Fig. 2, shown in 3, L1 section inlet hole plate nozzle (15) (34) (53) is taper shape or arc-shaped surface structure, incoming flow there is stronger attraction guide functions, make in the smooth flow nozzle of fluid energy, the fluid contraction distortion, inlet hole plate nozzle throat (16) (35) (54) fluid velocity inside increases, and has amplification of differential pressure signal, and straight length (17) (36) (55) is smooth column type before the L3 section, current stabilization of convection cell, the L4 section is quickened the interior profile of orifice plate nozzle (18) (37) (56) and is taper shape or arc-shaped surface structure, and fluid enters the drawdown deformation of L4 section accelerating jet (18) (37) (56) fluid secondary, and the L5 section is quickened orifice plate nozzle throat (19) (38) (57) fluid velocity inside further to be increased, has the effect that differential pressure signal is amplified for the second time, straight length in the L6 section (20) (39) (58) is smooth column type, convection cell secondary current stabilization, and the L7 section detects the interior profile of orifice plate (27) (47) (66); Be conical structure, fluid flows into the L7 section and detects orifice plate (27) (47) (66) drawdown deformation for the third time, detect orifice plate throat (26) (45) (57) inner fluid average velocity in the L8 section and reach maximum, has the effect of for the third time differential pressure signal being amplified, straight length after the L9 section (28) (46) (65) is smooth column type, convection cell carries out diffusion, fluid velocity is slowed down, pressure recovers, the L6 section is to L8 section such as Fig. 2, shown in 3, preceding ring casing one (22), preceding ring casing two (40), back ring casing one (24), back ring casing two (43), taking out the static pressure of upstream and the dynamic pressure in downstream simultaneously all presses in ring casing separately, L6 section ring casing two (40) to the L8 section, back ring casing two (43) takes out the static pressure of upstream and the dynamic pressure in downstream is all pressed in ring casing separately, the bottom-up upstream of passing through separately, as shown in Figure 2, high-end pressure conduit two (33), downstream low side pressure conduit two (31) is transferred to pressure signal the preceding ring casing one (22) of first measuring diaphragm, in the back ring casing one (24), pressure signal mixes in ring casing separately all jointly for the last time presses, by, as shown in Figure 2, high-end pressure conduit one (13,) low side pressure conduit one (14), through high-end impulse catheter interface (9), low side impulse catheter interface (10), differential pressure signal is transported to differential pressure transmitter, by the accurate measurement of two measuring points, measure middle large pipeline accurately, the flow of especially big pipeline inner fluid.
Claims (3)
1. one kind is inserted combined type multi-measuring point throttle orifice plate apparatus, by the pipeline mounting flange, loose flange, many pole brackets and some measuring diaphragms are connected in series in proper order up and down and combine, it is characterized in that: mounting flange (2) lower end is welded on the pipeline (1), have the hole on it, loose flange (6) is fastened on the mounting flange (2) with screw (3), mounting flange upper end groove (4) matches with loose flange (6) lower end boss (7), the centre is added with pad (5), there is high-end pressure catheter interface (9) loose flange (6) upper end, low side impulse catheter interface (10), loose flange (6) lower end is connected with pole bracket one (12) upper end, high-end pressure conduit one (13) is arranged in the pole bracket one (12), one (14) 1 pair of pressure conduit of low side pressure conduit passes through, 1 pair of high low side pressure conduit upper end is connected with the high low side pressure of the 1 couple interface (8) (11) of loose flange (6) respectively, the 1 pair of high low side pressure conduit lower end respectively with the L6 section to the L8 section, the pressure interface (21) (23) of one (24) 1 pair of upper end of ring casing, preceding ring casing one (22) back of measuring diaphragm one upper end is connected, pole bracket one (12) lower end is connected with measuring diaphragm one L3 section to L9 section upper end, pole bracket two (30) upper ends are connected with measuring diaphragm one L3 section L9 section lower end, high-end pressure conduit two (33) is arranged in the pole bracket two (30), two (31) 1 pairs of pressure conduits of low side pressure conduit pass through, the upper end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, 1 pair of pressure interface (32) (29) of ring casing one (24) lower end, preceding ring casing one (22) back of measuring diaphragm one lower end is connected, the 1 pair of high low side pressure conduit lower end respectively with the L6 section to the L8 section, preceding ring casing two (40) the back ring casings two (43) of measuring diaphragm two upper ends, the pressure interface (41) (42) of 1 pair of upper end is connected, pole bracket two (30) lower ends are connected with measuring diaphragm two L3 sections to L9 section upper end, pole bracket three (49) upper ends are connected with the lower end of measuring diaphragm two L3 sections to the L9 section, high-end pressure conduit three (52) is arranged in the pole bracket three (49), three (50) 1 pairs of pressure conduits of low side pressure conduit pass through, the upper end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, the pressure interface (51) (48) of two (43) 1 pairs of lower ends of ring casing, preceding ring casing two (40) back of measuring diaphragm two lower ends is connected, the lower end of 1 pair of high low side pressure conduit respectively with the L6 section to the L8 section, the pressure interface (60) (61) of three (62) 1 pairs of upper ends of ring casing, preceding ring casing three (59) back of measuring diaphragm three upper ends is connected, pole bracket three (49) lower ends are connected with the upper end of measuring diaphragm three L3 sections to the L9 section, cantilever fixed support tube four (67) upper ends are connected with the lower end of measuring diaphragm three L3 sections to the L9 section, cantilever fixed support tube four (67) lower ends are passed the pipeline lower wall and are linked to each other with fixed support upper flange (68), fixed support lower flange (69), the centre is added with pad (70) lower flange on the fastening fixed support of screw (71), many pole brackets, some measuring diaphragms are connected in series in proper order to make up up and down and form.
2. insertion combined type multi-measuring point throttle orifice plate apparatus according to claim 1, it is characterized in that: pole bracket is formed by some, there is high low side pressure conduit to pass through in every pole bracket, the 1st pole bracket upper end is connected with loose flange, the lower end is connected with measuring diaphragm, middle some pole brackets, every pole bracket upper and lower side is connected with the upper and lower side of 1 measuring diaphragm up and down, last 1 pole bracket upper end is connected with the lower end of last 1 measuring diaphragm, and last 1 pole bracket lower end is passed the pipeline lower wall and is connected with pipeline lower wall fixed support flange.
3. insertion combined type multi-measuring point throttle orifice plate apparatus according to claim 1 and 2, it is characterized in that: some pole brackets and some measuring diaphragms are connected in series in proper order to make up up and down and form, the measuring diaphragm outer mold surface is smooth circular arc type, profile is to be taper shape or arc-shaped surface structure by L1 section inlet hole plate nozzle in the measuring diaphragm, L2 section inlet hole plate nozzle throat, the smooth column type of straight length before the L3 section, the L4 section is quickened the orifice plate nozzle and is taper shape or arc-shaped surface structure, the L5 section is quickened the orifice plate nozzle throat, the smooth column type of straight length in the L6 section, the L7 section detects orifice plate and is conical structure, the L8 section detects orifice plate throat, the smooth column type of straight length after the L9 section, L6 section to L8 section is the some to the front and back ring casing of some measuring diaphragms, and L7 section to L8 section detects orifice plate and adopts throat's pressure structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201358471U CN201016759Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point orifice throttling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201358471U CN201016759Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point orifice throttling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201016759Y true CN201016759Y (en) | 2008-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201358471U Expired - Fee Related CN201016759Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point orifice throttling device |
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| Country | Link |
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| CN (1) | CN201016759Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735293A (en) * | 2012-07-05 | 2012-10-17 | 中国天辰工程有限公司 | Venturi shaped porous orifice meter |
| CN105526980A (en) * | 2016-01-15 | 2016-04-27 | 江苏华海测控技术有限公司 | Multi-nozzle balance flowmeter |
| CN109990849A (en) * | 2013-09-26 | 2019-07-09 | 保罗·范巴斯科克 | Orifice plate |
| CN110487346A (en) * | 2019-08-12 | 2019-11-22 | 西安航天动力试验技术研究所 | A kind of big flow cryogenic propellant supply line rectification orifice plate and its design method |
| CN111458069A (en) * | 2020-04-17 | 2020-07-28 | 中船黄埔文冲船舶有限公司 | Wind pressure measuring device and measuring method of ventilating duct |
-
2006
- 2006-09-26 CN CNU2006201358471U patent/CN201016759Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735293A (en) * | 2012-07-05 | 2012-10-17 | 中国天辰工程有限公司 | Venturi shaped porous orifice meter |
| CN109990849A (en) * | 2013-09-26 | 2019-07-09 | 保罗·范巴斯科克 | Orifice plate |
| CN105526980A (en) * | 2016-01-15 | 2016-04-27 | 江苏华海测控技术有限公司 | Multi-nozzle balance flowmeter |
| CN110487346A (en) * | 2019-08-12 | 2019-11-22 | 西安航天动力试验技术研究所 | A kind of big flow cryogenic propellant supply line rectification orifice plate and its design method |
| CN110487346B (en) * | 2019-08-12 | 2021-02-26 | 西安航天动力试验技术研究所 | Rectification pore plate for high-flow low-temperature propellant supply pipeline and design method thereof |
| CN111458069A (en) * | 2020-04-17 | 2020-07-28 | 中船黄埔文冲船舶有限公司 | Wind pressure measuring device and measuring method of ventilating duct |
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Granted publication date: 20080206 Termination date: 20130926 |