CN214200669U - Model test bench for verifying ventilation design scheme of main transformer hole - Google Patents
Model test bench for verifying ventilation design scheme of main transformer hole Download PDFInfo
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- CN214200669U CN214200669U CN202022954949.9U CN202022954949U CN214200669U CN 214200669 U CN214200669 U CN 214200669U CN 202022954949 U CN202022954949 U CN 202022954949U CN 214200669 U CN214200669 U CN 214200669U
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Abstract
The utility model discloses a verify model test platform that main hole ventilation design was become, including the test bench body, this external test bench protects the structure, still is equipped with double-deck insulating glass observation window in one side of test bench body, and the measuring aperture has still been opened to the side of test bench body, and indoor air is handled through refrigerating unit and is sent into each room of test bench inside to the air supply state parameter of design back through forced draught blower and blast pipe, and the heat load is arranged to external environment through exhaust fan and exhaust pipe. On the basis of the built model test bed, main air parameters in the main transformer hole are measured by using speed and temperature measuring instruments, and whether the ventilation scheme of the main transformer hole can enable indoor parameters to achieve the expected effect or not is judged by processing and analyzing the obtained data, and corresponding engineering technical measures are provided on the basis.
Description
Technical Field
The utility model relates to an underground building environmental engineering field specifically is a verify model test platform that main hole ventilation design was become.
Background
The main transformer hole is an important component of the pumped storage power station, and is located underground, so that the arrangement of electrical equipment in a plant is huge. The general main transformer tunnel is divided into three layers, namely a main transformer layer, an underground GIS layer and a ventilation layer. The main transformer layer is provided with equipment such as a main transformer, a high-voltage plant transformer, a switch cabinet and a main transformer neutral point reactor, the underground GIS layer is provided with underground GIS equipment, and the ventilation layer is provided with equipment such as a fan and an air pipe. The main hole internal equipment that becomes gives out heat very big, and is located the underground, for guaranteeing the normal operating of power station unit, must have reasonable reliable heating, ventilation, air conditioner, dehumidification system in the factory building.
The model test is an important means for verifying the ventilation design scheme, the scale of each physical quantity of the prototype and the model is reasonably selected according to a similar theory, a model test bed similar to the prototype is built to carry out test research, the flow and heat transfer in the prototype can be simulated by utilizing the flow heat transfer of the model, relevant data are obtained, and the design scheme is evaluated. The model test can conveniently control main experimental parameters, is convenient for changing the parameters to carry out contrast test, and has wide application in the field of indoor environment control.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art not enough, provide a verify the model test platform that main hole ventilation design was become, utilize similar theory to build with the similar model test platform major structure of main hole prototype that becomes, according to inside equipment of ventilation design preparation of reality and heat source to and ventilation system and cold source etc..
The technical scheme of the utility model test bench of verifying main hole ventilation design scheme that becomes, including the test bench body, this external test bench protects the structure, still is equipped with double-deck insulating glass observation window in one side of test bench body, and the measuring aperture has still been opened to the side of test bench body, and indoor air is handled through refrigerating unit and is sent into each room of test bench inside to the air supply state parameter of design after through forced draught blower and blast pipe, and the heat load is arranged to external environment through exhaust fan and exhaust pipe.
The air supply and exhaust fans of the test bed adopt small axial flow type variable frequency pipeline fans.
An indoor air conditioner is installed in the laboratory to maintain the stability of the indoor air environment.
The outer protective structure of the test bed adopts a polyurethane plate as a material heat-insulating refrigerating plate.
Has the advantages that: on the basis of the built model test bed, main air parameters in the main transformer hole are measured by using speed and temperature measuring instruments, and whether the ventilation scheme of the main transformer hole can enable indoor parameters to achieve the expected effect or not is judged by processing and analyzing the obtained data, and corresponding engineering technical measures are provided on the basis.
Drawings
FIG. 1 is an installation diagram of a model test stand for verifying a ventilation design scheme of a main transformer cavern.
Fig. 2 is an internal sectional view a-a of the model test stand.
Reference numerals: 1-refrigerating unit, 2-blower, 3-blast pipe, 4-measuring hole, 5-test stand enclosure, 6-indoor air conditioner, 7-observation window, 8-exhaust fan and 9-exhaust pipe.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The model test bed device main body strictly follows 1 according to the actual size of a pumped storage power station plant: a geometric scale of 30 is designed and built, the size is accurate to millimeter, and the error range is +/-5 mm. The outer peripheral structure 5 of the test bed adopts a polyurethane insulation board with the thickness of 100mm (the heat conductivity coefficient lambda is less than or equal to 0.024 w/m.k under the condition of 0-40 ℃), and the stability of the thermal environment in the test bed is effectively ensured. And the partitions among the main variable layer, the auxiliary rooms and the galleries in the main variable hole are light and thin 12mm Freund plates. As shown in figure 1, in order to ensure the sealing and heat-insulating performance of the main transformer hole, the gaps are filled with rubber-plastic foamed heat-insulating cotton. For the convenience of observation, a double-layer insulating glass observation window 7 is arranged on one side of the model test bed, and the size is 1600mm multiplied by 300 mm. The side surface of the test bed is provided with a measuring hole 4 so as to measure the air flow rate, temperature and other parameters of each room in the main transformer hole.
In order to meet the technical requirement of constant temperature and humidity in the main transformer hole, an indoor air conditioner 6 is arranged in a laboratory to maintain the stability of an indoor air environment, meanwhile, the test bed selects a specially-customized refrigerating unit 1 to realize the design requirement of constant air supply parameters of the test bed, and air conditioning is carried out on the indoor environment of the main transformer hole. The indoor air is processed to designed air supply state parameters by the refrigerating unit 1, then is sent to each room in the main transformer tunnel test bed through the air feeder 2 and the air supply pipeline 3, bears the heat load of the room, and is exhausted to the external environment through the exhaust fan 8 and the exhaust pipeline 9. The air supply and exhaust fans of the test bed all adopt small axial flow type variable frequency pipeline fans, the air volume and the full pressure of the fans meet the requirements of design working conditions, the air supply and exhaust pipelines adopt PVC plastic pipes, and in order to improve the heat insulation performance of an air supply and exhaust system and reduce heat loss, the surfaces of the air supply and exhaust pipelines are covered with polystyrene foam heat insulation materials with the thickness of 25 mm.
The specific operation flow is as follows:
1. and starting the indoor air conditioner, and starting a cold source and an air supply and exhaust fan of the test bed after the indoor air environment is stable.
2. And adjusting a cold source system controller and a fan frequency converter to enable the air supply quantity and the air supply temperature to reach design requirements, simultaneously opening a heat source, running for a period of time, and waiting for the speed and the temperature parameters inside the test bed to reach stability.
3. And measuring the air flow velocity and the air temperature in each room of the main transformer hole through a measuring hole on the side surface of the test bed by using a hot wire anemometer, and recording experimental data.
4. According to the design scheme, the air supply volume and the air supply temperature are changed, and the measurement is carried out again after the speed and the temperature of the air in the test bed are stable.
5. And processing and analyzing the measured experimental data by using data processing software to obtain parameters such as the average temperature, the average wind speed and the like of the experimental room, judging whether the parameters meet the design standard or not, and evaluating the ventilation design scheme of the main transformer cavern on the basis.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be defined by the appended claims.
Claims (4)
1. The model test bed for verifying the ventilation design scheme of the main transformer hole is characterized by comprising a test bed body, wherein a test bed outer protective structure is arranged outside the test bed body, a double-layer heat-insulation glass observation window is further arranged on one side of the test bed body, a measuring hole is further formed in the side face of the test bed body, indoor air is sent into each room inside the test bed through a refrigerating unit sequentially through a blower and an air supply pipe, and heat load is exhausted to the external environment through an exhaust fan and an exhaust pipeline.
2. The model test bed for verifying the ventilation design scheme of the main transformer cavern as recited in claim 1, wherein the air supply and exhaust fans of the test bed are small axial flow variable frequency pipeline fans.
3. The model test bench for verifying ventilation design of main transformer cavern as recited in claim 1, wherein a room air conditioner is installed in a laboratory to maintain stability of room air environment.
4. The model test bed for verifying the ventilation design scheme of the main transformer cavern as recited in claim 1, wherein a polyurethane plate is adopted as the refrigeration plate in the outer peripheral structure of the test bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022954949.9U CN214200669U (en) | 2020-12-08 | 2020-12-08 | Model test bench for verifying ventilation design scheme of main transformer hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022954949.9U CN214200669U (en) | 2020-12-08 | 2020-12-08 | Model test bench for verifying ventilation design scheme of main transformer hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214200669U true CN214200669U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022954949.9U Active CN214200669U (en) | 2020-12-08 | 2020-12-08 | Model test bench for verifying ventilation design scheme of main transformer hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214200669U (en) |
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2020
- 2020-12-08 CN CN202022954949.9U patent/CN214200669U/en active Active
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