CN212409790U - Throat diameter adjustable venturi tube for current limiting test - Google Patents
Throat diameter adjustable venturi tube for current limiting test Download PDFInfo
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- CN212409790U CN212409790U CN202021123801.4U CN202021123801U CN212409790U CN 212409790 U CN212409790 U CN 212409790U CN 202021123801 U CN202021123801 U CN 202021123801U CN 212409790 U CN212409790 U CN 212409790U
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Abstract
The utility model discloses a throat diameter adjustable Venturi tube for current limiting test, which comprises a fluid pipe, wherein the inner wall of the fluid pipe 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 cross-sectional dimension 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 corresponding in position 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, 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, and first sleeve pipe, second sleeve pipe are equipped with the sealing plug between with the fluid pipe wall. The venturi tube can conveniently adjust the size of the throat of the venturi tube in the tube body at any time.
Description
Technical Field
The utility model relates to a venturi technical field, concretely relates to venturi with adjustable larynx footpath for the current-limiting is experimental.
Background
For the flow measurement of liquid and gas, a sensor is arranged on a pipeline through which a fluid flows, an electric signal is measured through the sensor, the electric signal can reflect the pressure difference of the fluid in the pipeline, the flow velocity of the fluid can be calculated through the pressure difference, and the flow velocity and the flow rate Q are calculated 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 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, comprising: the detection pipeline is used for allowing the fluid to be detected to pass through and is made of a rigid material; a driving member for providing a driving force to the actuating member; the actuating 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 actuating component and the installation wall surface, and the cross-sectional 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-mentioned detection device is still relatively complex in structure and still not simple and convenient enough in operation.
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 volume system is provided with a flow-limiting venturi on a main pipe of an outlet of a make-up water pump, and is mainly used for preventing the make-up water pump of the chemical volume system from operating at an over-flow rate, avoiding cavitation at the inlet of the make-up water pump and limiting the maximum dilution flow rate; the equipment is important equipment for ensuring the normal and stable operation of the water replenishing 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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a simple structure, it is convenient to measure, can be according to the actual need of venturi throat diameter position current-limiting flow, temperature, pressure, conveniently adjust the venturi throat diameter adjustable venturi that is used for the current-limiting test of venturi throat size in the body at any time.
In order to achieve the above object, the technical solution of the present invention is to provide a throat diameter adjustable venturi tube for current limiting test, the venturi tube comprises a fluid tube, an 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 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, an outer ring of the cavity ring is provided with an annular opening, i.e. the cross-section of the cavity ring is a C-shaped split ring, an opening part of the C-shaped split ring is closely adhered to the surface of the lantern ring, a first radial through hole and a second radial through hole corresponding to each other are respectively arranged on a tube wall of the fluid tube, an annular wall on one side of the lantern ring and an annular wall on the cavity ring, the first radial through hole only passes through the annular wall on, the first sleeve and the second sleeve are respectively arranged in the first radial through hole and the second radial through hole, wherein scales are arranged on the outer wall of the second sleeve at least arranged in the second radial through hole or a displacement sensor is connected with the outer wall of the second sleeve, the connecting end between the second sleeve and the annular wall of the cavity ring is in sealing connection, and sealing plugs are arranged at the connecting ends between the first sleeve and the wall of the fluid pipe and between the first sleeve and the second sleeve.
In order to enable the cavity ring to have certain strength and bear certain air pressure or hydraulic pressure and simultaneously ensure that the cavity ring does not leak after being inflated or filled with liquid, the preferred technical scheme is that the cavity ring is a nylon cavity ring, a waterproof coating is attached to the inner wall of the nylon cavity ring, and an annular support with a trapezoidal section is further arranged on the inner wall of the 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 and 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 section size of the throat pipe, the further preferable 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 clamping 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 different parts of the fluid pipe, a further preferred technical scheme is that a plurality of annular grooves are arranged on 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 adjust the axial structure or the axial dimension of the throat part in the fluid pipeline conveniently, 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 adjust the axial structure or the axial dimension of the throat part in the fluid pipeline conveniently, the cross section of the lantern ring is U-shaped, 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 conveniently adjust the axial structure or the axial size of the throat part in the fluid pipe, a further preferable technical scheme is that the fluid pipe is 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 flow limiting test, a further preferred technical scheme is that an outer tube in the fluid tube is a steel tube, and an inner tube is a plastic tube.
The utility model has the advantages of the venturi with adjustable this a throat diameter for current-limiting test has simple structure, and it is convenient to measure, can conveniently adjust characteristics such as venturi's choke size in the body at any time according to the actual need of surveying internal flow of buret, pressure. This venturi with adjustable larynx footpath for current-limiting test can fill gas or liquid into the cavity ring through the life buoy formula cavity ring of holding between annular groove and the lantern ring on the fluid vessel inner wall to and let in the inside first sleeve pipe of cavity ring, makes the cavity ring swell, and the cavity ring after the swelling forms the throat pipe structure in the venturi in the fluid vessel. And then the fluid management device can be connected with a flow measurer through the first sleeve penetrating through the pipe wall of the pipe body and penetrating through the two side walls of the cavity ring through the sleeve 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 original state of the tank body can be recovered. 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 the experimental pipe fitting 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 venturi tube with adjustable throat diameter for the current limiting test according to the present invention for the state to be measured;
FIG. 2 is one of the schematic diagrams of the venturi tube with adjustable throat diameter for the current limiting test according to the present invention;
FIG. 3 is a second schematic diagram of the venturi tube with adjustable throat diameter for flow-limiting test according to the present invention in a state to be measured;
FIG. 4 is a second schematic view showing the measurement state 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 venturi tube with adjustable throat diameter for flow-limiting test according to the present invention, showing the state to be measured;
FIG. 6 is a third schematic view showing the measurement state of the venturi tube with adjustable throat diameter for the current limiting test of the present invention;
FIG. 7 is a schematic structural diagram of a current-limiting venturi tube 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 will further describe embodiments of the present invention with reference to the accompanying drawings and examples. 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 fig. 1 and 2, the utility model relates to a throat diameter adjustable venturi tube for current limiting test, the venturi tube comprises a fluid tube 1, the inner wall of the fluid tube 1 is provided with an annular groove 2, a lantern ring 3 matched with the annular groove 2 is nested in the annular groove 2, a life ring type cavity ring 4 is clamped between the annular groove 2 and the lantern ring 3, the cross-sectional dimension of the cavity ring 4 is larger than that of the annular groove 2, the outer ring of the cavity ring 4 is provided with an annular opening, i.e. the cross-section of the cavity ring is a C-shaped split ring, the opening part of the C-shaped split ring is closely adhered to the surface of the lantern ring 3, a first radial through hole 5 and a second radial through hole 6 which are corresponding in position 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 first radial through hole 5 only passes through the ring wall on one side of the cavity ring 4, the second radial, be equipped with first sleeve pipe 7 and second sleeve pipe 8 in first radial through-hole 5 and second radial through-hole 6 respectively, wherein set up at least the outer wall of second sleeve pipe 8 in second radial through-hole 6 and be equipped with the scale or be connected with displacement sensor, and the link between the rampart of second sleeve pipe 8 and cavity ring 4 is sealing connection, first sleeve pipe 7, second sleeve pipe 8 be equipped with sealing plug 9 on the link between with fluid pipe 1 pipe wall, sealing plug 9 is used for preventing fluidic leakage.
In order to make cavity ring 4 have certain intensity, can bear certain atmospheric pressure or hydraulic pressure, ensure simultaneously that cavity ring 4 can not take place to leak after aerifing or the topping up, be cylindricly in order to ensure the cross sectional shape at venturi throat footpath position simultaneously, the utility model discloses preferred embodiment is, cavity ring 4 is nylon cavity ring, and the inner wall at nylon cavity ring is attached to there is waterproof coating, still is equipped with the cross-section on the inner wall of nylon cavity ring and is trapezoidal ring carrier 4.1.
In order to make cavity ring 4 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 to can also adjust the cross sectional dimension of choke, be cylindricly in order to ensure the cross sectional shape at venturi throat footpath position simultaneously, the utility model discloses preferred embodiment still, cavity ring 4 is the rubber ring, still is equipped with the cross-section on the inner wall of rubber ring and is trapezoidal ring carrier 4.1.
In order to make the cavity ring 4 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 to can also adjust the cross sectional dimension of choke, the further preferred embodiment of the utility model is also that the wall thickness of cavity ring 4 is become thin by the thickness gradually to the middle part of cavity ring 4 inner wall by the centre gripping section between annular groove 2 and the lantern ring 3, with the regulation of choke cross sectional dimension of being convenient for like this.
As shown in fig. 3 and 4, in order to facilitate the measurement of parameters such as the flow rate and pressure of the fluid in the fluid pipe 1 at different positions, the present invention further preferably further comprises a plurality of annular grooves 2 on the inner wall of the fluid pipe 1, a lantern ring 3 fitted with the annular groove 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 lantern ring 3.
As shown in fig. 5 and 6, in order to adjust the axial structure or the axial dimension of the throat portion in the fluid pipe 1, a further preferred embodiment of the present invention is to provide a plurality of closely arranged collars 3 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 structure or the axial dimension of the throat portion in the fluid pipe 4, a further preferred embodiment of the present invention is that the cross section of the collar 3 is U-shaped, or rectangular, or trapezoidal.
In order to be suitable for measuring parameters such as flow and pressure inside different fluid pipes 1, in order to facilitate adjustment of the axial structure or the axial dimension of the throat part in the fluid pipe 4, a further preferred embodiment of the present invention is that 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, the further preferred embodiment of the utility model is also that the fluid tube 1 is made by the nested assembly of the outer tube 1.1 and the inner tube 1.2, wherein the inner tube 1.2 is divided into a plurality of sections, and a gap forming the annular groove 2 is arranged between the inner tubes 1.2 of the plurality of sections.
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 embodiment of the utility model 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, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A throat diameter adjustable Venturi tube for a current limiting test is characterized in that the Venturi tube comprises a fluid tube, an annular groove is formed in the inner wall of the fluid tube, a lantern ring matched 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, the sectional dimension of the cavity ring is larger than that of the annular groove, an annular opening is formed in the outer ring of the cavity ring, namely the section of the cavity ring is a C-shaped split ring, the opening part of the C-shaped split ring is tightly bonded with the surface of the lantern ring, a first radial through hole and a second radial through hole which correspond in position are respectively arranged on the wall of the fluid tube, the ring wall of the lantern ring and the ring wall of the cavity ring, the first radial through hole only penetrates through the ring wall on one side of the cavity ring, the second radial through hole respectively penetrates through the ring walls on two sides of the cavity ring, a first sleeve and a second sleeve are respectively arranged in the first radial, wherein the outer wall that the second sleeve pipe that sets up at least in the second radial through-hole 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, and first sleeve pipe, second sleeve pipe are equipped with the sealing plug on the link between the pipe wall of fluid pipe.
2. The venturi tube with the adjustable throat diameter for the current-limiting test of claim 1, wherein the cavity ring is a nylon cavity ring, a waterproof coating is attached to the inner wall of the nylon cavity ring, and an annular bracket with a trapezoidal cross section is further arranged on the inner wall of the nylon cavity ring.
3. The venturi tube with the adjustable throat diameter for the current limiting test according to claim 2, wherein 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.
4. The adjustable throat diameter venturi tube for the current limiting test as claimed in claim 3, wherein the wall thickness of the cavity ring is gradually reduced from the thickness to the middle of the inner wall of the cavity ring by being clamped between the annular groove and the lantern ring.
5. The venturi tube with the adjustable throat diameter for the current limiting test according to claim 2 or 4, wherein a plurality of annular grooves are formed on the inner wall of the fluid tube, a lantern ring matched with the annular grooves is nested in each annular groove, and a life-saving ring type cavity ring is clamped between each annular groove and each lantern ring.
6. The venturi tube with adjustable throat diameter for the flow-limiting test according to claim 2 or 4, wherein a plurality of closely arranged lantern rings are arranged in the same annular groove, and a cavity ring is clamped on each lantern ring.
7. The venturi tube with adjustable throat diameter for the current-limiting test according to claim 2 or 4, wherein the cross section of the lantern ring is U-shaped, or rectangular, or trapezoidal.
8. The venturi tube with adjustable throat diameter for the current-limiting test of claim 1, wherein the fluid pipe is a steel pipe or a plastic pipe.
9. The adjustable throat diameter venturi tube according to claim 8, wherein the fluid pipe is made by nesting and assembling an outer pipe and an inner pipe, wherein the inner pipe is divided into a plurality of sections, and annular groove gaps are formed among the sections of the inner pipe.
10. The venturi tube with adjustable throat diameter for use in a flow restriction test of claim 9, wherein the outer tube of the fluid tube is a steel tube and the inner tube is a plastic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021123801.4U CN212409790U (en) | 2020-06-17 | 2020-06-17 | Throat diameter adjustable venturi tube for current limiting test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021123801.4U CN212409790U (en) | 2020-06-17 | 2020-06-17 | Throat diameter adjustable venturi tube for current limiting test |
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| Publication Number | Publication Date |
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| CN212409790U true CN212409790U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021123801.4U Active CN212409790U (en) | 2020-06-17 | 2020-06-17 | Throat diameter adjustable venturi tube for current limiting test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750939A (en) * | 2020-06-17 | 2020-10-09 | 江阴市节流装置厂有限公司 | Throat-adjustable Venturi tube for current limiting test |
| CN113790769A (en) * | 2021-10-22 | 2021-12-14 | 江阴申腾仪器仪表有限公司 | Venturi tube with adjustable throat diameter |
-
2020
- 2020-06-17 CN CN202021123801.4U patent/CN212409790U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750939A (en) * | 2020-06-17 | 2020-10-09 | 江阴市节流装置厂有限公司 | Throat-adjustable Venturi tube for current limiting test |
| CN111750939B (en) * | 2020-06-17 | 2022-06-28 | 江阴市节流装置厂有限公司 | Throat diameter adjustable venturi tube for current limiting test |
| CN113790769A (en) * | 2021-10-22 | 2021-12-14 | 江阴申腾仪器仪表有限公司 | Venturi tube with adjustable throat diameter |
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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. |
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| CP01 | Change in the name or title of a patent holder |