CN111750939B - A Venturi with adjustable throat diameter for current limiting test - Google Patents
A Venturi with adjustable throat diameter for current limiting test Download PDFInfo
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- CN111750939B CN111750939B CN202010554183.7A CN202010554183A CN111750939B CN 111750939 B CN111750939 B CN 111750939B CN 202010554183 A CN202010554183 A CN 202010554183A CN 111750939 B CN111750939 B CN 111750939B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a throat diameter adjustable Venturi tube for a current limiting test, which comprises a fluid tube, wherein the inner wall of the fluid tube is provided with an annular groove, a lantern ring matched with the annular groove is nested in the annular groove, a cavity ring is clamped between the annular groove and the lantern ring, the section size of the cavity ring is larger than that of the annular groove, a first radial through hole and a second radial through hole which are arranged on the pipe wall of the fluid pipe, the ring wall of the lantern ring and the ring wall of the cavity ring and correspond to each other in position are arranged, the first radial through hole only penetrates through the ring wall on one side of the cavity ring, the second radial through hole penetrates through the ring walls on two sides of the cavity ring, a first sleeve and a second sleeve are arranged in the first radial through hole and the second radial through hole, wherein the outer wall that the second sleeve pipe is equipped with the scale or is connected with displacement sensor, and the link between the rampart of second sleeve pipe and cavity ring is sealing connection, first sleeve pipe, second sleeve pipe with the fluid pipe wall between be equipped with the sealing plug. The Venturi tube has the advantages of simple structure, convenient measurement and convenient and fast adjustment of the size of the throat of the Venturi tube in the tube body at any time.
Description
Technical Field
The invention relates to the technical field of Venturi tube structures, in particular to a throat diameter adjustable Venturi tube for a current limiting test.
Background
For the flow measurement of liquid and gas, a sensor is arranged on a pipeline through which fluid flows, an electric signal is measured through the sensor, the electric signal can reflect the differential pressure of the fluid in the pipeline, the flow velocity of the fluid can be calculated through the differential pressure, and according to the density rho and the flow velocity v of the fluid, and the relation between the cross section A and the flow Q, the flow velocity is as follows: the flow can be obtained by Q ═ rho × v × A; the pressure difference delta p which can be sensed is between delta pmin and delta pmax due to the limitation of the measuring range of the sensor, and the measuring range ratio of the flow rate is equal to that of the same measuring pipeline
Is equal to
In an actual use scene, the range ratio of some flow processes is very large, a single conventional flowmeter cannot meet the requirement of full-range measurement, a plurality of flow measuring devices are generally connected in parallel in the prior art, the full-range measurement is carried out in a valve switching or combining mode to measure the flow in different processes, different valve combinations need to be switched according to different flow states, on one hand, the measurement process is complicated, the control program is complex, and more execution elements are required to be matched to complete the switching of the measurement devices; on the other hand, the measurement cost is increased by several times; finally, a plurality of measuring devices need larger installation space, higher requirements are put forward for applicable environment, and correspondingly, the installation, maintenance and overhaul costs are greatly increased.
Chinese patent CN 110987094 a discloses a rigid variable cross-section device, which comprises: the detection pipeline is used for allowing a fluid to be detected to pass through and is made of a rigid material; a driving part for providing a driving force for the executing part; the executing component is in transmission connection with the power output end of the driving component, is installed on the inner wall of the detection pipeline, and comprises at least one deformation unit which can act under the action of driving force so as to change the gap between the executing component and the installation wall surface, and the cross section area inside the detection pipeline is changed through the deformation unit. The problems of complex detection pipeline, high cost, large installation space and the like in the prior art are solved, the cross section of the detection pipeline is changed on line to widen the range ratio, the cost is greatly reduced, the installation space is reduced, the realizability of the variable section of the rigid detection pipeline is provided, and the device is flexible and reliable in action, high in sensitivity and easy to operate. However, the above detection device is still relatively complex in structure and still not easy to operate.
The CAP1400 nuclear power technology of the large-scale advanced pressurized water reactor nuclear power station is a third-generation passive nuclear power technology which is innovatively developed on the basis of the world third-generation advanced nuclear power technology API000 in digestion and absorption, has independent intellectual property rights, higher safety and better economy and reaches the international leading level. The chemical and volume control system is one of the most important auxiliary systems of the nuclear power plant, and has important functions of controlling the slow reactivity change of a reactor core, controlling the primary loop water charge, purifying the primary loop water quality, controlling the primary loop water chemistry condition and the like. The CAP1400 nuclear power plant chemical-capacitance system is provided with a flow-limiting venturi on a main pipe at the outlet of a make-up pump, and is mainly used for preventing the make-up pump of the chemical-capacitance system from operating at an excessive flow rate, avoiding cavitation at the inlet of the make-up pump and limiting the maximum dilution flow rate, and the equipment is important equipment for ensuring the normal and stable operation of the make-up pump and meeting the volume control requirement of a main system.
At present, as shown in fig. 7, for a current-limiting venturi tube for nuclear power, the flow of liquid flowing through the throat diameter of the venturi tube cannot exceed a set flow value under the conditions of set pressure and temperature for each specification of the current-limiting venturi tube. Therefore, the numerical value of the throat diameter is determined through repeated tests, in the prior art, the test pieces with different throat diameter sizes can be processed for multiple times to respectively perform repeated tests, so that the number of the test pieces to be manufactured is large, and the throat diameter size of the test piece is gradually close to the final required size. If the current-limiting Venturi tubes with various specifications are needed, the number of test pieces to be manufactured is large, huge manpower and material resources are wasted, and a large amount of time is consumed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the throat diameter adjustable Venturi tube for the flow limiting test, which has a simple structure, is convenient and quick to measure, and can conveniently adjust the size of the throat tube of the Venturi tube in the Venturi tube body at any time according to the actual requirements of the flow limiting flow, the temperature and the pressure of the throat diameter part of the Venturi tube.
In order to achieve the above object, the technical solution of the present invention is to provide a throat diameter adjustable venturi tube for a current limiting test, the venturi tube includes a fluid tube, an annular groove is disposed on an inner wall of the fluid tube, a lantern ring fitted with the annular groove is nested in the annular groove, a life-saving ring type cavity ring is clamped between the annular groove and the lantern ring, a cross-sectional dimension of the cavity ring is larger than a cross-sectional dimension of the annular groove, a first radial through hole and a second radial through hole corresponding in position are respectively disposed on a tube wall of the fluid tube, an annular wall of the lantern ring and an annular wall of the cavity ring, the first radial through hole passes through the annular wall on one side of the cavity ring, the second radial through hole passes through the annular walls on both sides of the cavity ring, a first sleeve and a second sleeve are respectively disposed in the first radial through hole and the second radial through hole, wherein at least an outer wall of the second sleeve disposed in the second radial through hole is provided with scales or connected with a displacement sensor, and the connecting end between the second sleeve and the annular wall of the cavity ring is in sealing connection, and the connecting ends between the first sleeve and the fluid pipe wall and between the first sleeve and the second sleeve are provided with sealing plugs.
In order to make the cavity ring have certain intensity, can bear certain atmospheric pressure or hydraulic pressure, ensure simultaneously that the cavity ring can not take place to leak after aerifing or the topping up, preferred technical scheme is, the cavity ring is nylon cavity ring, has attached to waterproof coating at the inner wall of nylon cavity ring, still is equipped with the ring carrier that the cross-section is trapezoidal on the inner wall of nylon cavity ring.
In order to enable the cavity ring to have certain strength, bear certain air pressure or hydraulic pressure, ensure that the cavity ring does not leak after being inflated or filled with liquid and adjust the sectional dimension of the throat pipe, the preferred technical scheme is that the cavity ring is a rubber ring, and an annular support with a trapezoidal section is further arranged on the inner wall of the rubber ring.
In order to enable the cavity ring to have certain strength, to bear certain air pressure or hydraulic pressure, to ensure that the cavity ring does not leak after being inflated or filled with liquid, and to adjust the section size of the throat pipe, a further preferred technical scheme is that the wall thickness of the cavity ring is gradually reduced from the thickness to the middle part of the inner wall of the cavity ring by being clamped between the annular groove and the lantern ring.
In order to facilitate the measurement of parameters such as flow rate, pressure and the like of fluid in the fluid pipe at different positions, a further preferred technical scheme is that a plurality of annular grooves are formed in the inner wall of the fluid pipe, a lantern ring matched with the annular groove is nested in each annular groove, and a life-saving ring type cavity ring is clamped between each annular groove and each lantern ring.
In order to facilitate adjustment of the axial structure or the axial size of the throat part in the fluid pipeline, a further preferable technical scheme is that a plurality of closely arranged lantern rings are arranged in the same annular groove, and a cavity ring is clamped on each lantern ring.
In order to facilitate adjustment of the axial structure or the axial size of the throat part in the fluid pipeline, a further preferable technical scheme is that the cross section of the lantern ring is U-shaped, or rectangular, or trapezoidal.
In order to be suitable for measuring parameters such as flow, pressure and the like in different fluid pipes, in order to facilitate adjustment of the axial structure or the axial size of the throat part in the fluid pipe, the fluid pipe is further preferably a steel pipe or a plastic pipe.
In order to facilitate the processing, manufacturing, mounting and debugging of the throat-diameter-adjustable venturi tube for the current limiting test, the further preferable technical scheme is that the fluid tube is formed by nesting and assembling an outer tube and an inner tube, wherein the inner tube is divided into a plurality of sections, and annular groove gaps are formed among the sections of the inner tube.
In order to facilitate the processing, manufacturing, mounting and debugging of the throat-diameter-adjustable Venturi tube for the current-limiting test, a further preferable technical scheme is that the outer tube in the fluid tube is a steel tube, and the inner tube is a plastic tube.
The throat diameter adjustable Venturi tube for the current limiting test has the advantages that the throat diameter adjustable Venturi tube for the current limiting test has the characteristics of simple structure, convenience and quickness in measurement, capability of conveniently adjusting the size of the throat of the Venturi tube in the tube body at any time according to actual requirements of flow and pressure in the measuring tube body, and the like. The throat diameter adjustable venturi tube for the current limiting test can fill gas or liquid into the cavity ring through the life ring type cavity ring which is additionally arranged between the annular groove and the lantern ring on the inner wall of the fluid tube and the first sleeve which is introduced into the cavity ring, so that the cavity ring is expanded, and the expanded cavity ring forms a throat tube structure in the venturi tube in the fluid tube. And then the fluid management device can be connected with a flow measurer by penetrating through the wall of the pipe body and penetrating through the first sleeve of the sleeve ring and penetrating through the two side walls of the cavity ring, so that various parameters of fluid management can be measured. After the measurement is finished, the measurer is withdrawn, and the gas or liquid in the cavity ring is emptied, so that the tank body can be restored to the original state. A plurality of cavity ring structures can be arranged at a plurality of positions in the fluid pipe, each cavity ring can be made into different sizes, and the cavity rings can be made into elastic bodies, so that the effect of adjusting the area of the throat pipe section is achieved. The structure is used for the flow-limiting experiment of the throat diameter part of the Venturi tube, so that the manufacturing of a pipe fitting for the experiment can be greatly saved, and a large amount of manpower, material resources and test time can be saved.
Drawings
FIG. 1 is one of the schematic diagrams of the present invention showing the state to be measured of a venturi tube with adjustable throat diameter for flow-limiting test;
FIG. 2 is one of the measuring states of the venturi tube with adjustable throat diameter for the current limiting test according to the present invention;
FIG. 3 is a second diagram of the measured state of the throat-adjustable venturi tube for flow-limiting test according to the present invention;
FIG. 4 is a second schematic view showing the measurement status of the venturi tube with adjustable throat diameter for the current limiting test according to the present invention;
FIG. 5 is a third schematic diagram of the measured state of the venturi tube with adjustable throat diameter for flow limiting test according to the present invention;
FIG. 6 is a third schematic view showing the measurement state of the venturi tube with adjustable throat diameter for the flow-limiting test according to the present invention;
FIG. 7 is a schematic view of a conventional flow-limiting venturi for nuclear power.
1. A fluid pipe; 1.1, an outer tube; 1.2, an inner tube; 2. an annular groove; 3. a collar; 4. a cavity ring; 4.1, a ring-shaped bracket; 5. a first radial through hole; 6. a second radial through hole; 7. a first sleeve; 8. a second sleeve; 9. a sealing plug;
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in figures 1 and 2, the invention relates to a throat-diameter-adjustable Venturi tube for a current-limiting test, which comprises a fluid tube 1, wherein an annular groove 2 is formed in the inner wall of the fluid tube 1, a lantern ring 3 matched with the annular groove 2 is nested in the annular groove 2, a life-buoy-type cavity ring 4 is clamped between the annular groove 2 and the lantern ring 3, the sectional dimension of the cavity ring 4 is larger than that of the annular groove 2, first radial through holes 5 and second radial through holes 6 are respectively arranged on the tube wall of the fluid tube 1, the ring wall of the lantern ring 3 and the ring wall of the cavity ring 4, the positions of the first radial through holes 5 and the positions of the second radial through holes 6 are corresponding to each other, the first radial through holes 5 only penetrate through the ring wall of one side of the cavity ring 4, the second radial through holes 6 respectively penetrate through the ring walls of two sides of the cavity ring 4, a first sleeve pipe 7 and a second sleeve 8 are respectively arranged in the first radial through holes 5 and the second radial through holes 6, wherein the outer wall of a second sleeve 8 at least arranged in the second radial through holes 6 is provided with scales or connected with displacement sensing devices And the connecting end between the second sleeve 8 and the annular wall of the cavity ring 4 is in sealing connection, the connecting ends between the first sleeve 7 and the second sleeve 8 and the pipe wall of the fluid pipe 1 are provided with sealing plugs 9, and the sealing plugs 9 are used for preventing fluid leakage.
In order to enable the cavity ring 4 to have certain strength, bear certain air pressure or hydraulic pressure, ensure that the cavity ring 4 does not leak after being inflated or filled with liquid and ensure that the section of the throat diameter part of the Venturi tube is cylindrical, the preferred embodiment of the invention is that the cavity ring 4 is a nylon cavity ring, a waterproof coating is attached to the inner wall of the nylon cavity ring, and an annular support 4.1 with a trapezoidal section is further arranged on the inner wall of the nylon cavity ring.
In order to ensure that the cavity ring 4 has certain strength, can bear certain air pressure or hydraulic pressure, simultaneously ensure that the cavity ring does not leak after being inflated or filled with liquid, and also adjust the sectional dimension of the throat pipe, and simultaneously ensure that the section of the throat diameter part of the Venturi pipe is cylindrical, the preferred embodiment of the invention is that the cavity ring 4 is a rubber ring, and the inner wall of the rubber ring is also provided with an annular bracket 4.1 with a trapezoidal section.
In order to make the cavity ring 4 have certain strength, can bear certain air pressure or hydraulic pressure, ensure the cavity ring will not leak after inflating or filling liquid, and can also adjust the cross-sectional dimension of the throat, the further preferred embodiment of the invention is that the wall thickness of the cavity ring 4 is gradually reduced from the thickness of the clamping section between the annular groove 2 and the lantern ring 3 to the middle part of the inner wall of the cavity ring 4, which facilitates the adjustment of the cross-sectional dimension of the throat.
As shown in fig. 3 and 4, in order to measure parameters such as flow rate and pressure of fluid in different parts of the fluid pipe 1, a further preferred embodiment of the present invention is that a plurality of annular grooves 2 are arranged on the inner wall of the fluid pipe 1, a collar 3 matched with the annular grooves 2 is nested in each annular groove 2, and a life ring type cavity ring 4 is clamped between each annular groove 2 and each collar 3.
In order to facilitate the adjustment of the axial configuration or the axial dimension of the throat region in the fluid pipe 1, as shown in fig. 5 and 6, a further preferred embodiment of the present invention is that a plurality of closely arranged collars 3 are arranged in the same annular groove 2, and a cavity ring 4 is clamped on each collar 3.
In order to facilitate adjustment of the axial configuration or axial dimension of the throat region within the fluid pipe 4, a further preferred embodiment of the present invention is that the collar 3 has a U-shaped, or rectangular, or trapezoidal cross-section.
In order to be suitable for measuring parameters such as flow rate and pressure in different fluid pipes 1, in order to facilitate adjustment of the axial structure or axial size of the throat part in the fluid pipe 4, according to a further preferred embodiment of the present invention, the fluid pipe 1 is a steel pipe or a plastic pipe.
In order to facilitate the processing, manufacturing, installing and debugging of the throat-diameter-adjustable venturi tube for the current limiting test, in a further preferred embodiment of the present invention, the fluid tube 1 is formed by nesting and assembling an outer tube 1.1 and an inner tube 1.2, wherein the inner tube 1.2 is divided into a plurality of sections, and gaps forming the annular groove 2 are arranged between the plurality of sections of the inner tube 1.2.
In order to facilitate the processing, manufacturing, installing and debugging of the throat-diameter-adjustable venturi tube used for the flow limiting test, a further preferred embodiment of the invention is that the outer tube 1.1 in the fluid tube 11 is a steel tube, and the inner tube 1.2 is a plastic tube.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010554183.7A CN111750939B (en) | 2020-06-17 | 2020-06-17 | A Venturi with adjustable throat diameter for current limiting test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010554183.7A CN111750939B (en) | 2020-06-17 | 2020-06-17 | A Venturi with adjustable throat diameter for current limiting test |
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| Publication Number | Publication Date |
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| CN111750939A CN111750939A (en) | 2020-10-09 |
| CN111750939B true CN111750939B (en) | 2022-06-28 |
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| CN202010554183.7A Active CN111750939B (en) | 2020-06-17 | 2020-06-17 | A Venturi with adjustable throat diameter for current limiting test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250116541A1 (en) * | 2023-10-04 | 2025-04-10 | Saudi Arabian Oil Company | Dynamic venturi for multiphase flow meters |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11519767B2 (en) * | 2020-09-08 | 2022-12-06 | Saudi Arabian Oil Company | Determining fluid parameters |
| CN112461304B (en) * | 2020-11-09 | 2024-04-19 | 江苏威尔胜电子科技有限公司 | Venturi tube with changeable throat section |
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| CN120368298A (en) * | 2025-06-25 | 2025-07-25 | 杭州新世纪能源环保工程股份有限公司 | PO device multi-waste-stream incineration treatment system |
| CN120393897B (en) * | 2025-07-04 | 2025-11-21 | 延安大学 | A photocatalytic carbon dioxide reduction reaction device |
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Address after: 214400 No.1-3 Kailai Road, nanzha street, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: JIANGYIN THROTTLING DEVICE MANUFACTURER Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 214400 No.1-3 Kailai Road, nanzha street, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: JIANGYIN THROTTLING DEVICE MANUFACTURER Co.,Ltd. Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |