CN201016760Y - Plug-in combined type multi-point nozzle type Venturi tube throttling device - Google Patents
Plug-in combined type multi-point nozzle type Venturi tube throttling device Download PDFInfo
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- CN201016760Y CN201016760Y CNU2006201358490U CN200620135849U CN201016760Y CN 201016760 Y CN201016760 Y CN 201016760Y CN U2006201358490 U CNU2006201358490 U CN U2006201358490U CN 200620135849 U CN200620135849 U CN 200620135849U CN 201016760 Y CN201016760 Y CN 201016760Y
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- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 abstract description 43
- 238000005259 measurement Methods 0.000 abstract description 19
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 230000006641 stabilisation Effects 0.000 description 10
- 238000011105 stabilization Methods 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 9
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
An inserted combined multi-measuring point nozzle-type Venturi tube 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 nozzle Venturi tubes 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 nozzle Venturi tube consists of an inlet nozzle, a front straight pipe section, an accelerating nozzle, a middle straight pipe section, a detecting Venturi tube 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 nozzle type Venturi tube restriction device of especially big pipeline fluid flow measurement.
Background technology:
At present, the industrial fluids flow measurement, IGWC plug-in type Venturi tube is adopted in the measurement of middle large pipeline, especially big pipeline fluid flow, insert combined nozzle, Venturi nozzle and plug-in type even speed tube etc., be 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, nozzle, Venturi nozzle class restriction device and plug-in type average rate tubing measurement mechanism in the above-mentioned deficiency aspect middle large pipeline, the especially big pipeline fluid flow measurement, the utility model provides a kind of this restriction device of insertion combined type multi-measuring point nozzle type Venturi tube restriction device 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 nozzle type Venturi tubes 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), the centre is added with pad (5), flange adopts concaveconvex structure, to guarantee that flange seal is tight up and down, prevent to leak, guarantee that again installing and locating is accurate, simple and convenient, prevent to install and fix dislocation and shake produced loosening, there is high-end pressure catheter interface (9) loose flange (6) upper end, low side pressure catheter interface (10), with the high low side pressure measuring valve door of convenient connection, pressure unit and differential pressure transmitter, 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, 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 gaging nozzle type Venturi tube one upper end respectively, pole bracket one (12) lower end is connected with gaging nozzle type Venturi tube one L3 section to L9 section upper end, pole bracket two (30) upper ends are connected with gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube two L3 sections to the L9 section, pole bracket three (49) upper ends are connected with the lower end of gaging nozzle type Venturi tube 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 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube three upper ends with L6 respectively, pole bracket three (49) lower ends are connected with the upper end of gaging nozzle type Venturi tube three L3 sections to the L9 section, cantilever fixed support tube four (67) upper ends are connected with the lower end of gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube is cascaded have been guaranteed greatly from top to bottom; guarantee the consistance of vertical and horizontal axis vertical with pipeline of many gaging nozzle type Venturi tubes simultaneously with horizontal axis; deviation does not take place; effectively prevent many gaging nozzle type Venturi tube swings and skew, and effectively protect the pressure conduit not by fluid scouring.Gaging nozzle type Venturi tube one, two to N gaging nozzle type Venturi tubes of gaging nozzle type Venturi tube outer mold surface; Be smooth column type, the measurement mechanism that profile is made up of the structure that the generation differential pressure signal is set in the measuring tube in the gaging nozzle type Venturi tube, L1 section inlet nozzle is an arc-shaped surface, L2 section inlet nozzle throat is smooth cylindrical shape, straight tube is the smooth face of cylinder before the L3 section, the L4 section is that accelerating jet or Venturi tube are arc-shaped surface or coned face, the L5 section is that accelerating jet or Venturi tube throat are that straight length is that smooth face of cylinder L7 section is a coned face for detecting Venturi tube in the smooth cylindrical shape L6 section, the L8 section is smooth cylindrical shape for detecting Venturi tube throat, and straight length is smooth cylindrical surface after the L9 section.L1 section inlet nozzle convection cell has the attraction guide functions, the fluid contraction distortion, fluid enters inlet nozzle, during the L2 section of flowing through inlet 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 instability, change big problem, fluid is tended towards stability, the L4 section is accelerating jet or Venturi tube, when fluid enters accelerating jet or Venturi tube, drawdown deformation, the fluid secondary quickens, during to L5 section accelerating jet throat, mean flow rate reaches secondary and quickens maximal value, straight length secondary current stabilization in the L6 section, and the L7 section is for detecting Venturi tube, fluid enters when detecting Venturi tube, drawdown deformation again, fluid quickens for the third time, when detecting Venturi tube 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.Measure Venturi tube for some, be inserted on the different measuring points in the pipeline mean flow rate scope, the signal of measuring is all pressed through each front and back ring casing of measuring Venturi tube, be transferred in the last front and back ring casing of measuring Venturi tube by high low side pressure pipe separately and all press, be transferred to first front and back ring casing of measuring Venturi tube 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 gaging nozzle type Venturi tube restriction devices of combined type, when adopting some point measurements, for inserting combined type multi-measuring point nozzle type Venturi tube restriction device.
The technical solution adopted in the utility model comprises following technical parameter, inlet nozzle inside diameter D=20-200 millimeter, accelerating jet β value=d/D=0.2～0.775, detection Venturi tube β value=d/D=0.2～0.775, preceding flow development length L=0.5-5D, middle flow development length L=0.5-3D, back flow development length L-0.2～2D, gaging nozzle type Venturi tube total length L=2-10D, first gaging nozzle type Venturi tube and last gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tubes have been guaranteed greatly; the stability of being connected in series and soundness; guaranteed that some gaging nozzle type Venturi tubes are vertical all the time with conduit axis and parallel; effectively prevent the measuring error that some gaging nozzle type Venturi tube 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, and rigidity is poor, strengthens 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 gaging nozzle type Venturi tube, adopt the arc-shaped surface nozzle or the coned face Venturi tube structure of repeatedly shrinking, has the multiple signal enlarging function, improve 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 nozzle adopts the arc-shaped surface structure, it is long-pending to have increased the inlet fluoran stream surface, incoming flow had attract guide functions preferably, the once accelerating effect of inlet nozzle convection cell, preceding once current stabilization effect of straight length convection cell, the accelerating jet convection cell has the secondary accelerating effect, middle straight section convection cell has the effect of secondary current stabilization, detect the Venturi tube 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, and 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 gaging nozzle type Venturi tubes to be connected in series, in to pipeline mean flow rate scope, flow in the pipeline is correctly measured in the measurement of some measuring point fluids 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 the multimetering of some gaging nozzle type Venturi tubes, under the bigger situation of fluid dust, utilize the kinetic energy of fluid to remove the function that falls into dust in the nozzle type Venturi tube 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 nozzle type Venturi tube restriction device vertical section structure figure.
Fig. 2 inserts the two measuring point nozzle type Venturi tube restriction device vertical section structure figure of combined type.
Fig. 3 is a nozzle type Venturi tube sectional structure chart.
Fig. 4 is the mounting flange sectional structure chart.
Fig. 5 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 nozzle type Venturi tube restriction device, 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 gaging nozzle type Venturi tubes aim at flow path direction, first gaging nozzle type Venturi tube is below pipeline upper wall 0.242R, last gaging nozzle type Venturi tube is apart from more than the pipeline lower wall 0.242R, mounting flange (2), as Fig. 1, shown in 4, the lower end is welded on the pipeline (1), has the hole on it, and 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. 1, to guarantee that flange seal is tight up and down, prevent to leak shown in 4, guarantee that again installing and locating is accurate, simple and convenient, prevent to install and fix dislocation and shake produced loosening, loose flange (6) as shown in Figure 1, 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) is as shown in Figure 1, the lower end is connected with pole bracket one (12) upper end, and 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, 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 gaging nozzle type Venturi tube one upper end is connected, and pole bracket one (12) is as Fig. 1, shown in 5, lower end and gaging nozzle type Venturi tube one L3 section are to the L9 section, as Fig. 1, shown in 3, the upper end is connected, and pole bracket two (30) is as Fig. 1, shown in 5, upper end and gaging nozzle type Venturi tube one L3 section are to the L9 section, as Fig. 1, shown in 3, the lower end is connected, and 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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) is as Fig. 1, and shown in 5, lower end and gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube two L3 sections are to the L9 section, as Fig. 1, the lower end is connected shown in 3, and 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, 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, the pressure interface (51) (48) of two (43) 1 pairs of lower ends of ring casing, preceding ring casing two (40) back of gaging nozzle type Venturi tube 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 casing, preceding ring casing three (59) back of gaging nozzle type Venturi tube three upper ends is connected, pole bracket three (49) as shown in Figure 1, lower end and gaging nozzle type Venturi tube three L3 sections are to the L9 section, as Fig. 1, shown in 3, the upper end is connected, cantilever fixed support tube four (67) as shown in Figure 1, upper end and gaging nozzle type Venturi tube 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 fixed support lower flange (69) with fixed support upper flange (68), be added with pad (70) lower flange on the fastening fixed support of screw (71) as shown in Figure 1, to guarantee that flange seal is tight up and down, prevent to leak, pole bracket one to some as Fig. 1, shown in 5, it is streamlined or plate that fluoran stream surface is, gaging nozzle type Venturi tube one to some as Fig. 1, shown in 3, outer mold surface is smooth circular arc type, interior profile is as Fig. 1, shown in 3, L1 section inlet nozzle (15) (34) (53) is the curved surface arc-shaped structure, incoming flow there is stronger attraction guide functions, makes in the smooth flow nozzle of fluid energy the fluid contraction distortion, inlet 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 interior profile of L4 section accelerating jet or Venturi tube (18) (37) (56), as Fig. 1, shown in 3, be arc-shaped surface or coned face structure, fluid enters L4 section accelerating jet or the drawdown deformation of Venturi tube (18) (37) (56) fluid secondary, L5 section accelerating jet or Venturi tube throat (19) (38) (57) fluid velocity inside further increase, and have the effect that differential pressure signal is amplified for the second time, and 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 Venturi tube (27) (47) (66), as Fig. 1, shown in 3, be conical structure, fluid flows into the L7 section and detects Venturi tube (27) (47) (66) drawdown deformation for the third time, detects Venturi tube throat (26) (45) (57) inner fluid average velocity in the L8 section and reaches 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, 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube, 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 nozzle type Venturi tube restriction devices 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 gaging nozzle type Venturi tubes aims at flow path direction, and first gaging nozzle type Venturi tube is inserted in the following scope of pipeline upper wall 0.242R, and second gaging nozzle type Venturi tube is inserted in the above scope of pipeline lower 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), and mounting flange upper end groove (4) matches with loose flange (6) lower end boss (7), 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, prevent to leak shown in 4, guarantee that again installing and locating is accurate, simple and convenient, prevent to install and fix dislocation and shake produced loosening, loose flange (6) is 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, and 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, 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, the pressure interface (21) (23) of one (24) 1 pair of upper end of ring casing, preceding ring casing one (22) back of the type of gaging nozzle shown in 3 Venturi tube one upper end is connected, pole bracket one (12) as shown in Figure 2, lower end and gaging nozzle type Venturi tube one L3 section are to the L9 section, as Fig. 2, shown in 3, the upper end is connected, and pole bracket two (30) upper ends and gaging nozzle type Venturi tube one L3 section L9 section are 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, preceding ring casing one (22) back of gaging nozzle type Venturi tube 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. 2, shown in 3, the preceding ring casing two (40) of gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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, gaging nozzle type Venturi tube one, two as Fig. 2, and shown in 3, outer mold surface is smooth circular arc type, interior profile such as Fig. 2, shown in 3, L1 section inlet nozzle (15) (34) (53) is the curved surface arc-shaped structure, and incoming flow is had stronger attraction guide functions, make in the smooth flow nozzle of fluid energy, the fluid contraction distortion, inlet nozzle throat (16) (35) (54) fluid velocity inside increases, and has amplification of differential pressure signal, straight length (17) (36) (55) is smooth column type before the L3 section, current stabilization of convection cell, the interior profile of L4 section accelerating jet or Venturi tube (18) (37) (56) is arc-shaped surface or conical structure, and fluid enters L4 section accelerating jet or the drawdown deformation of Venturi tube (18) (37) (56) fluid secondary, L5 section accelerating jet or Venturi tube throat (19) (38) (57) fluid velocity inside further increase, 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 Venturi tube (27) (47) (66) and is conical structure, fluid flows into the L7 section and detects Venturi tube (27) (47) (66) drawdown deformation for the third time, detects Venturi tube throat (26) (45) (57) inner fluid average velocity in the L8 section and reaches 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, and fluid velocity is slowed down, and 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) takes out the dynamic pressure in the static pressure of upstream and downstream simultaneously and 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), pressure signal is transferred to the preceding ring casing one (22) of first gaging nozzle type Venturi tube, and 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) is transported to differential pressure transmitter with differential pressure signal, 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 nozzle type Venturi tube restriction device, by the pipeline mounting flange, loose flange, many pole brackets, some gaging nozzle type Venturi tubes 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 gaging nozzle type Venturi tube one upper end is connected, pole bracket one (12) lower end is connected with gaging nozzle type Venturi tube one L3 section to L9 section upper end, pole bracket two (30) upper ends are connected with gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube two L3 sections to L9 section upper end, pole bracket three (49) upper ends are connected with the lower end of gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube 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 gaging nozzle type Venturi tube three upper ends is connected, pole bracket three (49) lower ends are connected with the upper end of gaging nozzle type Venturi tube three L3 sections to the L9 section, cantilever fixed support tube four (67) upper ends are connected with the lower end of gaging nozzle type Venturi tube three L3 sections to the L9 section, cantilever fixed support tube four (67) lower ends are connected with fixed support upper flange (68) by the pipeline lower wall, 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 gaging nozzle type Venturi tubes are connected in series in proper order to make up up and down and form.
2. insertion combined type multi-measuring point nozzle type Venturi tube restriction device 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 gaging nozzle type Venturi tube, middle some pole brackets, the upper and lower side of every pole bracket upper and lower side and 2 gaging nozzle type Venturi tubes is connected, last 1 pole bracket upper end is connected with the lower end of 1 gaging nozzle type Venturi tube, and the lower end is passed with the pipeline lower wall and is connected with pipeline lower wall fixed support flange.
3. insertion combined type multi-measuring point nozzle type Venturi tube restriction device according to claim 1 and 2, it is characterized in that: some of some of pole brackets and gaging nozzle type Venturi tubes, order is connected in series to make up and forms up and down, gaging nozzle type Venturi tube outer mold surface is smooth circular arc type, interior profile L1 section inlet nozzle is the arc-shaped surface structure, the cylindrical structure of L2 section inlet nozzle throat, the smooth cylindrical structure of straight length before the L3 section, L4 section accelerating jet is the arc-shaped surface structure, L5 section accelerating jet throat, the smooth cylindrical structure of straight length in the L6 section, the L7 section detects Venturi tube and is conical structure, the L8 section detects the cylindrical structure of Venturi tube throat, the smooth cylindrical structure of straight length after the L9 section, L6 section to L8 section are some and measure the some to the front and back ring casing of Venturi tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201358490U CN201016760Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point nozzle type Venturi tube throttling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201358490U CN201016760Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point nozzle type Venturi tube throttling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201016760Y true CN201016760Y (en) | 2008-02-06 |
Family
ID=39057252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201358490U Expired - Fee Related CN201016760Y (en) | 2006-09-26 | 2006-09-26 | Plug-in combined type multi-point nozzle type Venturi tube throttling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201016760Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| CN105545281A (en) * | 2015-11-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Gas throttling simulation device |
-
2006
- 2006-09-26 CN CNU2006201358490U patent/CN201016760Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928030A (en) * | 2012-11-27 | 2013-02-13 | 银川融神威自动化仪表厂(有限公司) | Matrix Venturi type cross section flowmeter |
| CN105545281A (en) * | 2015-11-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Gas throttling simulation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20130926 |