CN111540493A - Array type gas injection device - Google Patents
Array type gas injection device Download PDFInfo
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- CN111540493A CN111540493A CN202010418082.7A CN202010418082A CN111540493A CN 111540493 A CN111540493 A CN 111540493A CN 202010418082 A CN202010418082 A CN 202010418082A CN 111540493 A CN111540493 A CN 111540493A
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- gas
- gas injection
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses an array type gas injection device, which comprises: a substrate; the gas injection pipes are respectively arranged on the substrate in a telescopic way and are respectively used for extending gas outlets into a flow channel of a cooling system outside the pressure vessel; and the gas injection mechanism is respectively connected with the plurality of gas injection pipes and is used for respectively providing gas with preset flow for each gas injection pipe. The invention can be arranged at the corresponding position in the flow channel according to the test requirement, and the plurality of gas injection pipes can accurately simulate the two-phase flow states with different distances from the wall surface and different lengths of the flow channel, thereby effectively improving the accuracy of the test measurement result and greatly improving the test measurement efficiency.
Description
Technical Field
The invention relates to the field of reactor thermal hydraulic power, in particular to a telescopic array type gas injection device for a pressurized water reactor.
Background
In the event of a serious accident in advanced pressurized water reactors, external cooling of the pressure vessel (ERVC) is an important serious accident mitigation measure. Under the ERVC condition, the decay heat of the molten matters in the pressurized water reactor is mainly used for taking away the heat through natural circulation in a flow passage formed between the outer wall of the pressure vessel and the heat insulation layer.
At present, the research on the external cooling process of the pressure vessel is mainly carried out through experiments, and the injection of air is an important mode for simulating the two-phase flow state in the experiments.
However, the conventional air injection method is implemented by arranging a gas injection pipe in the flow channel and adjusting the amount of gas injection according to the test requirements. The existing air injection mode has the defects that the position of the air injection pipeline is not easy to set, and the flow stratification phenomenon in the two-phase natural circulation process cannot be simulated. Due to the factors, the test measurement result is not accurate enough, and the test measurement efficiency is reduced, so that the research on data analysis by scientific research personnel is seriously influenced.
Disclosure of Invention
The invention provides an array type gas injection device, and particularly relates to a device for controlling and distributing gas phase in two-phase flow, aiming at overcoming the defects of low accuracy of measurement results and low test measurement efficiency of ERVC process tests in the prior art.
The invention solves the technical problems through the following technical scheme:
an array gas injection apparatus, comprising:
a substrate;
the gas injection pipes are respectively arranged on the substrate in a telescopic way and are respectively used for extending gas outlets into a flow channel of a cooling system outside the pressure vessel; and the number of the first and second groups,
and the gas injection mechanism is respectively connected with the plurality of gas injection pipes and is used for respectively providing gas with preset flow for each gas injection pipe.
Optionally, a channel is formed in the substrate along the height direction;
the plurality of gas injection pipes sequentially penetrate through the channel of the substrate along the height direction of the substrate;
the groove channels are provided with groove scales used for representing the distance between the gas injection pipes.
Optionally, the surface shape of the substrate comprises a rectangle; and/or the presence of a gas in the gas,
the channel comprises a rectangular channel.
Optionally, each gas injection pipe is used for adjusting the extension length of the gas outlet relative to the substrate through a positioning bolt.
Optionally, each of the gas injection pipes is provided with a pipe scale for indicating the extension length along the pipe length direction.
Optionally, a gas outlet of each gas injection pipe is provided with a gas homogenizing hole plate;
the air homogenizing hole plates are respectively provided with a plurality of air homogenizing holes.
Optionally, the pore diameter of each uniform pore on the uniform pore plate is the same; and/or the presence of a gas in the gas,
the number range of the uniform air holes formed in the uniform air hole plate is 6-8; and/or the presence of a gas in the gas,
the material of the gas-homogenizing hole plate comprises ceramic.
Optionally, the inner diameter of the gas injection pipe ranges from 12mm to 50mm, and the inner diameter of the gas homogenizing hole plate is smaller than that of the gas injection pipe.
Optionally, the gas injection mechanism comprises an air compressor, a gas tank, a plurality of gas flow meters, a plurality of regulating valves and a plurality of gas injection pipelines;
the air compressor is connected with the air storage tank, the air storage tank is respectively connected with a plurality of air injection pipelines, each air injection pipeline corresponds to one air injection pipe, one gas flowmeter and one regulating valve, each air injection pipeline is respectively connected with an air inlet of the corresponding air injection pipe, and each gas flowmeter and each regulating valve are respectively arranged on the corresponding air injection pipeline;
the air compressor is used for providing gas to the gas holder;
the gas storage tank is used for storing the acquired gas and providing the gas to the gas injection pipeline;
the gas flowmeter is used for collecting the gas flow in the corresponding gas injection pipeline;
the regulating valve is used for regulating the gas flow in the corresponding gas injection pipeline according to the gas flow so as to provide gas with preset flow for the corresponding gas injection pipe.
Optionally, the substrate is made of stainless steel; and/or the presence of a gas in the gas,
the material of the gas injection pipe comprises stainless steel.
On the basis of the common knowledge in the field, the preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
the array type gas injection device provided by the invention can be arranged at the corresponding position in the flow channel according to the test requirement, and the two-phase flow states with different distances from the wall surface and different lengths of the flow channel can be accurately simulated by the plurality of gas injection pipes, so that the accuracy of the test measurement result is effectively improved, and the test measurement efficiency is greatly improved.
Drawings
The features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
FIG. 1 is a schematic diagram of an array gas injection apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a gas homogenizing hole plate according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a substrate according to an embodiment of the invention.
Description of reference numerals:
1 a substrate;
11 a channel;
2, a gas injection pipe;
3, homogenizing the air pore plate;
31 air homogenizing holes;
4, a gas injection pipeline;
5, a gas flow meter;
6, adjusting a valve;
7, an air storage tank;
8 air compressor.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The main disadvantage of the existing air injection mode is that the position of the air injection pipeline is not easy to set, and the flow stratification phenomenon in the two-phase natural circulation process cannot be simulated. Due to the factors, the test measurement result is not accurate enough, and the test measurement efficiency is reduced, so that the research on data analysis by scientific research personnel is seriously influenced.
In order to overcome the above-mentioned drawbacks, the present embodiment provides an array type gas injection apparatus, comprising: a substrate; the gas injection pipes are respectively arranged on the substrate in a telescopic way and are respectively used for extending gas outlets into a flow channel of a cooling system outside the pressure vessel; and the gas injection mechanism is respectively connected with the plurality of gas injection pipes and is used for respectively providing gas with preset flow for each gas injection pipe.
In this embodiment, the array type gas injection device is used for a pressurized water reactor, can adjust the position, change the gas injection depth, and can simulate the two-phase flow layering phenomenon at different positions away from the wall surface, so that various two-phase flow conditions under non-heating conditions can be provided for scientific research personnel, and technical support is provided for two-phase flow research.
Specifically, as an embodiment, as shown in fig. 1 to 3, the array type gas injection apparatus mainly includes a substrate 1 (arrangement module), a plurality of gas injection pipes 2 (gas injection module), and a gas injection mechanism (loop auxiliary module).
Referring to fig. 3, a groove 11 is formed in the middle of the base plate 1 along the height direction, and a groove scale (not shown) for indicating a distance may be printed on the groove 11 or on the base plate 1 on both sides of the groove 11.
Preferably, in the embodiment, referring to fig. 3, the surface of the substrate 1 is rectangular, and the channel 11 is a rectangular channel, but the shapes of the substrate 1 and the channel 11 are not particularly limited, and can be selected and adjusted according to actual requirements.
Preferably, in this embodiment, in order to ensure the hardness of the substrate 1, the material of the substrate 1 is stainless steel, but the material of the substrate 1 is not particularly limited, and may be selected and adjusted according to actual requirements.
A plurality of gas injection pipe 2 respectively along the direction of height of base plate 1 run through in proper order set up in the channel of base plate, can the position of gas injection pipe 2 is adjusted from top to bottom in the direction of height of base plate 1, and corresponding adjustment can be carried out according to the experimental demand in the upper and lower position of gas injection pipe 2.
Preferably, in the present embodiment, the number of the gas injection pipes 2 is at least 3, but the number of the gas injection pipes 2 is not particularly limited, and can be selected and adjusted according to actual needs.
The groove scale on the groove 11 is used to indicate the distance between the respective gas injection pipes 2, so that the positional information of the respective gas injection pipes 2 in the vertical direction is accurately obtained by the groove scale.
Each gas injection pipe 2 is used for extending a gas outlet into a flow channel of a cooling system outside the pressure vessel, each gas injection pipe 2 is used for adjusting the extension length of the gas outlet relative to the substrate 1 through a positioning bolt (not shown in the figure), and each gas injection pipe 2 can be fixed through the corresponding positioning bolt after the position is determined.
Each gas injection pipe 2 is provided with a pipe scale for indicating the extension length along the pipe length direction, so that the length information of the gas injection pipe 2 extending into the flow channel can be accurately acquired through the pipe scale.
Referring to fig. 2, in order to ensure that the air in the air injection pipes 2 is uniformly sprayed out, a corresponding air-distributing pore plate 3 is respectively arranged at the air outlet of each air injection pipe 2, and a plurality of air-distributing pores 31 are respectively arranged on the air-distributing pore plate 3. The gas homogenizing hole plate 3 may be connected to the gas injection pipe 2 by using epoxy resin glue.
Preferably, in the present embodiment, the aperture of each uniform air hole 31 on the uniform air hole plate 3 is the same, but the aperture of the uniform air hole 31 is not particularly limited, and can be selected and adjusted according to actual requirements.
In this embodiment, the number of the air-homogenizing holes 31 opened in the air-homogenizing hole plate 3 may range from 6 to 8, and preferably may be 7, but the number of the air-homogenizing holes 31 is not particularly limited, and can be selected and adjusted accordingly according to actual requirements.
Preferably, in the embodiment, the material of the gas-homogenizing hole plate 3 is ceramic, but the material of the gas-homogenizing hole plate 3 is not particularly limited, and can be selected and adjusted according to actual requirements.
In the present embodiment, the inner diameter of the gas injection pipe 2 ranges from 12mm to 50mm, and preferably, may be 14mm, and the inner diameter of the gas uniforming plate 3 is smaller than the inner diameter of the gas injection pipe 2, and preferably, may be 13.5 mm. However, the inner diameters of the gas injection pipe 2 and the gas homogenizing hole plate 3 are not particularly limited in this embodiment, and can be selected and adjusted according to actual requirements.
Preferably, in this embodiment, the material of the gas injection pipe 2 is stainless steel, so as to achieve high temperature resistance and corrosion resistance, but the material of the gas injection pipe 2 is not particularly limited, and can be selected and adjusted accordingly according to actual requirements.
In this embodiment, by arranging a plurality of stainless steel gas injection tubes with tube scales on a stainless steel rectangular channel, a realistic simulation of the two-phase flow conditions at different locations within the flow channel can be achieved.
Referring to fig. 1, the gas injection mechanism mainly includes a plurality of gas injection pipes 4, a plurality of gas flow meters 5, a plurality of regulating valves 6, a gas storage tank 7, and an air compressor 8, although the number and types of each component are not specifically limited in this embodiment, as long as the corresponding function can be realized, the corresponding selection and adjustment can be performed according to actual requirements.
The air compressor 8 is connected with the air storage tank 7, the air storage tank 7 is connected with a plurality of gas injection pipelines 4 respectively, each gas injection pipeline 4 corresponds to one gas injection pipe 2, one gas flowmeter 5 and one regulating valve 6, each gas injection pipeline 4 is connected with the gas inlet of the corresponding gas injection pipe 2 respectively, and each gas flowmeter 5 and each regulating valve 6 are arranged on the corresponding gas injection pipeline 4 respectively.
The air compressor 8 is used to supply air, which may be air or other gas, to the air tank 7.
The gas tank 7 is used for storing the acquired gas and supplying the gas to each gas injection pipe 4 through a corresponding valve.
The gas flow meter 5 is used for collecting the gas flow in the corresponding gas injection pipeline 4, and the regulating valve 6 is used for regulating the gas flow in the corresponding gas injection pipeline 4 according to the gas flow so as to provide the gas with the preset flow to the corresponding gas injection pipe 2.
The array gas injection device that this embodiment provided can install a plurality of gas injection pipes according to the scientific research personnel demand, and the gas injection flow is adjustable, and the gas injection is even, can adjust the flexible length of gas injection pipe and the position on the base plate according to the demand, can simulate the two-phase flow layering phenomenon that probably appears in the real operating mode to promote experimental measuring result's accuracy effectively, greatly promoted experimental measurement efficiency. Moreover, the array type gas injection device is simple in structural design and strong in operability.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. An array gas injection apparatus, comprising:
a substrate;
the gas injection pipes are respectively arranged on the substrate in a telescopic way and are respectively used for extending gas outlets into a flow channel of a cooling system outside the pressure vessel; and the number of the first and second groups,
and the gas injection mechanism is respectively connected with the plurality of gas injection pipes and is used for respectively providing gas with preset flow for each gas injection pipe.
2. The array gas injection apparatus of claim 1, wherein the substrate has a channel formed along a height direction;
the plurality of gas injection pipes sequentially penetrate through the channel of the substrate along the height direction of the substrate;
the groove channels are provided with groove scales used for representing the distance between the gas injection pipes.
3. The array gas injection apparatus of claim 2, wherein the surface shape of the substrate comprises a rectangle; and/or the presence of a gas in the gas,
the channel comprises a rectangular channel.
4. The array gas injection apparatus of claim 1, wherein each of the gas injection tubes is configured to adjust an extension of the gas outlet relative to the substrate via a positioning bolt.
5. The array gas injection apparatus of claim 4 wherein each of the gas injection tubes is provided with a tube scale along the length of the tube for indicating the extension length.
6. The array gas injection apparatus according to claim 1, wherein a gas homogenizing plate is provided at the gas outlet of each gas injection tube;
the air homogenizing hole plates are respectively provided with a plurality of air homogenizing holes.
7. The array gas injection apparatus according to claim 6 wherein the pore diameter of each of the gas homogenizing holes on the gas homogenizing pore plate is the same; and/or the presence of a gas in the gas,
the number range of the uniform air holes formed in the uniform air hole plate is 6-8; and/or the presence of a gas in the gas,
the material of the gas-homogenizing hole plate comprises ceramic.
8. The array gas injection apparatus of claim 6, wherein the gas injection tube has an inner diameter in the range of 12mm to 50mm, and the gas distribution plate has an inner diameter smaller than the inner diameter of the gas injection tube.
9. The array gas injection apparatus of claim 1, wherein the gas injection mechanism comprises an air compressor, a gas tank, a plurality of gas flow meters, a plurality of regulating valves, and a plurality of gas injection pipes;
the air compressor is connected with the air storage tank, the air storage tank is respectively connected with a plurality of air injection pipelines, each air injection pipeline corresponds to one air injection pipe, one gas flowmeter and one regulating valve, each air injection pipeline is respectively connected with an air inlet of the corresponding air injection pipe, and each gas flowmeter and each regulating valve are respectively arranged on the corresponding air injection pipeline;
the air compressor is used for providing gas to the gas holder;
the gas storage tank is used for storing the acquired gas and providing the gas to the gas injection pipeline;
the gas flowmeter is used for collecting the gas flow in the corresponding gas injection pipeline;
the regulating valve is used for regulating the gas flow in the corresponding gas injection pipeline according to the gas flow so as to provide gas with preset flow for the corresponding gas injection pipe.
10. The array gas injection apparatus according to any of claims 1 to 9, wherein the substrate comprises stainless steel; and/or the presence of a gas in the gas,
the material of the gas injection pipe comprises stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418082.7A CN111540493A (en) | 2020-05-18 | 2020-05-18 | Array type gas injection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010418082.7A CN111540493A (en) | 2020-05-18 | 2020-05-18 | Array type gas injection device |
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| CN111540493A true CN111540493A (en) | 2020-08-14 |
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