CN212008993U

CN212008993U - Radiation protection cover with flow guide surface for meteorological measurement

Info

Publication number: CN212008993U
Application number: CN202020267089.9U
Authority: CN
Inventors: 杨杰; 邓玄; 刘清惓; 陈高颖
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Jiangsu tongjinyuan Technology Co.,Ltd.
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-11-24
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses a radiation protection cover for meteorological measurement with water conservancy diversion face, correspond the first kuppe and the second kuppe that the structure size is the same that the interval level was placed including from top to bottom, it is fixed through thermal-insulated column connection between first kuppe and the second kuppe, form the water conservancy diversion passageway between, first kuppe center department is to protruding first water conservancy diversion cambered surface that forms between two kuppes, and non-bellied part forms the plane ring, second kuppe center department is to protruding second water conservancy diversion cambered surface that forms unanimous with first water conservancy diversion cambered surface size between two kuppes, first water conservancy diversion cambered surface/second water conservancy diversion cambered surface arc top department is equipped with the fixed column, the extension end of fixed column is equipped with the temperature sensor probe. The radiation shield can effectively increase the air velocity around the temperature sensor probe, reduce the influence of temperature rise caused by direct solar radiation on the temperature sensor probe, reduce the reflected solar radiation from the underlying surface and enable the temperature measurement to be more accurate.

Description

Radiation protection cover with flow guide surface for meteorological measurement

Technical Field

The utility model belongs to the technical field of meteorological instrument technique and specifically relates to a meteorological measurement is with radiation protection cover with water conservancy diversion face is related to.

Background

In the daytime, the solar radiation causes the temperature sensor of the meteorological station to be heated, so that the observed value of the temperature sensor is higher than the air temperature of the surrounding environment, and the error caused by the phenomenon is called solar radiation error. At present, a louver box or a natural ventilation radiation-proof cover for a meteorological station can avoid direct radiation of the sun to a temperature sensor probe, and radiation errors are reduced. However, since the white coating on the outer surface of the louver or radiation shield is difficult to reflect the solar radiation 100%, the conventional louver or radiation shield, especially the blades and the ring plates thereof, still generates a significant radiation temperature rise to a certain extent, which causes the air flow flowing into the interior thereof to be heated, resulting in the observation result of the internal temperature sensor probe being higher than the temperature of the external free air. In addition, the blades and the ring plate are not favorable for air flow circulation, and the radiation error is further increased due to low air flow speed inside the louver box or the radiation shield. It is generally believed that a reduction in the air flow velocity inside the shield is accompanied by a thermal pollution effect. Because gaps are formed between the blades of the louver box and the ring piece of the radiation shield, a certain proportion of solar direct radiation, scattered radiation and ground reflected radiation always enter the instrument from the gaps and irradiate the surface of the temperature sensor probe, and the radiation error is further enlarged due to the effect. The radiation error of the temperature sensor based on the traditional louver box and the radiation-proof cover can reach 1 ℃ or even higher. The blades of the louver box and the ring blades of the radiation-proof cover not only cause the problem of radiation errors, but also reduce the response speed of the temperature sensor probe and cause hysteresis errors, and the hysteresis of the wooden louver box can reach more than 10 minutes. In addition, the thermal capacities of the louver box and the radiation-proof cover are large, so that great difficulty is brought to temperature pulsation observation. A good radiation shield design for a weather station should not only minimize the solar radiation reaching the surface of the temperature sensor probe, but also maximize the air flow velocity around the temperature sensor probe within the radiation shield. The use of vanes or rings helps to meet the first requirement, but it is difficult to meet the second requirement and thus to eliminate the effect of thermal pollution. Therefore, the two design requirements are contradictory, which brings difficulty to the improvement of the performance of the radiation shield.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the not enough of background art, the utility model discloses a radiation shield is used in meteorological measurement with water conservancy diversion face.

The technical scheme is as follows: the utility model discloses a radiation shield with water conservancy diversion face for meteorological measurement, the same first kuppe of structure size and the second kuppe of placing including corresponding interval level from top to bottom, it is fixed through thermal-insulated column connection between first kuppe and the second kuppe, form the water conservancy diversion passageway between, first kuppe center department is to protruding first water conservancy diversion cambered surface of formation between two kuppes, and the part that does not arch forms plane ring, second kuppe center department is to protruding second water conservancy diversion cambered surface of forming unanimous with first water conservancy diversion cambered surface size between two kuppes, first water conservancy diversion cambered surface/second water conservancy diversion cambered surface arc top department is equipped with the fixed column, the extension end of fixed column is equipped with the temperature sensor probe.

Further, the diameter of the first air guiding arc surface is equal to 1/2 of the diameter of the first air guiding sleeve.

Furthermore, a plurality of heat insulation columns are uniformly distributed on the circumferential direction of the plane circular ring part of the two air guide hoods at intervals, and the distribution angles are perpendicular to the two air guide hoods.

Further, the temperature sensor probe is located at the center of the flow guide channel.

Furthermore, the surfaces of the first air guide sleeve and the second air guide sleeve are plated with light reflecting materials.

Wherein, the reflecting material can be silver, nickel, aluminum or other high-reflecting materials.

Has the advantages that: compared with the prior art, the utility model has the advantages that: the radiation shield can effectively increase the air velocity around the temperature sensor probe, reduce the influence of temperature rise caused by direct solar radiation on the temperature sensor probe, reduce the reflected solar radiation from the underlying surface and enable the temperature measurement to be more accurate.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a front view of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the radiation shield with the flow guide surface for meteorological measurement includes a first flow guide cover 1 and a second flow guide cover 2 which are horizontally arranged at an interval from top to bottom and have the same structure size, wherein the two flow guide covers are of a circular structure, the first flow guide cover 1 and the second flow guide cover 2 are fixedly connected through a heat insulation column 3 to form a flow guide channel therebetween, the center of the first flow guide cover 1 protrudes between the two flow guide covers to form a first flow guide arc surface 101, and the non-protruding part forms a plane ring, so that the first flow guide arc surface 101 with the center of the first flow guide cover 1 and the plane ring surrounding the first flow guide arc surface 101 form, and the center of the second flow guide cover 2 protrudes between the two flow guide covers to form a second flow guide arc surface 201 which has the same size as the first flow guide arc surface 101.

The heat insulation columns 3 are uniformly distributed on the circumferential direction of the plane circular ring parts of the two air guide sleeves at intervals, and the distribution angles are perpendicular to the two air guide sleeves. In the embodiment, 3 heat insulation columns are respectively arranged on the circumference, and the included angle formed between each two adjacent heat insulation columns and the circle center is 120 degrees.

A fixing column 4 is arranged at the arc top of the first diversion arc surface 101 or the second diversion arc surface 201, and a temperature sensor probe 5 is arranged at the extending tail end of the fixing column 4. The fixing column 4 is located on a circle center connecting line of the first diversion arc-shaped surface 101 and the second diversion arc-shaped surface 201, so that the temperature sensor probe 5 is located at the center of the diversion channel. Even the temperature of air pipe inner wall can be increased to the sun direct radiation, scattered radiation, reflection radiation and the heat conduction effect daytime, the inside heating air current of pipeline can flow along the inner wall of pipeline to pass through the temperature sensor probe with great velocity of flow, take away the heat, reduce the temperature, keep in less within range with ambient temperature's difference. Similarly, even if the temperature of the pipe wall of the ventilation pipeline is reduced at night, the low-temperature air flow in the ventilation pipeline generally flows along the inner wall of the pipeline, so that the radiation pollution can be avoided to a certain extent, and the radiation error can be reduced.

The diameter of the first air guiding arc surface 101 is equal to 1/2 of the diameter of the first air guiding sleeve 1.

The surfaces of the first dome 1 and the second dome 2 are plated with light reflecting materials, the light reflecting materials can be silver, nickel, aluminum or other high-reflection materials, the shapes can be polygonal, circular or oval, and aluminum is adopted in the embodiment.

The flow guide channel effectively guides natural wind to circulate in the first flow guide cover 1 and the second flow guide cover 2, and the airflow inlet and the airflow outlet of the air area around the temperature sensor probe 5 are large and small, so that the airflow speed around the temperature sensor probe 4 can be effectively increased; the air current can flow through the radiation-proof cover in any direction of the side edge, the air current inlet of the whole ventilation pipeline is large, the outlet is small, the inner surface is smooth, the air current can be sensed in real time at any angle and direction under any horizontal wind direction, and the ventilation pipeline has relatively good ventilation. The inner wall of the ventilation pipeline is smooth, the upper inner wall and the lower inner wall are in a plane-arc-plane shape, horizontal low-angle airflow can be effectively guided to enter the ventilation pipeline, the airflow sensed by the temperature sensor probe 5 in the radiation shield is continuously updated, the observed temperature has good timeliness, meanwhile, horizontal low-angle solar radiation can be reflected, and the solar radiation is prevented from entering the radiation shield, so that radiation errors are reduced; the air guide sleeve can effectively reduce the temperature rise of the radiation protection cover caused by direct radiation of the sun, effectively reduce the reflected radiation from the underlying surface and prevent secondary radiation heat pollution. Equidistant and equal radian between two kuppes sets up 3 heat-insulating columns 3 and connects, can effectively strengthen the stability of protecting against radiation cover structure, can reduce the heat-conduction between two kuppes and the temperature sensor probe 5 again.

Simulation experiments prove that under the same environmental conditions, the radiation error of the temperature sensor in the radiation shield can be reduced to 0.05 ℃ magnitude, and the radiation error of the temperature sensor in the traditional louver box and the natural ventilation radiation shield can be up to 1 ℃ magnitude, so that the radiation error of the internal temperature sensor is reduced by the radiation shield. Compared with a blade type louver box and a ring-plate type radiation shield, the novel radiation shield has the advantages of smaller design volume, smaller weight, lower cost, relatively simple structure, and easiness in processing, manufacturing, maintaining, installing and cleaning.

Claims

1. The utility model provides a radiation shield is used in meteorological measurement with water conservancy diversion face which characterized in that: the heat insulation type air guide sleeve is characterized by comprising a first air guide sleeve (1) and a second air guide sleeve (2) which are horizontally arranged at intervals from top to bottom and have the same structure size, wherein the first air guide sleeve (1) and the second air guide sleeve (2) are connected and fixed through heat insulation columns (3), a flow guide channel is formed between the first air guide sleeve (1) and the second air guide sleeve, the center of the first air guide sleeve (1) protrudes between the two air guide sleeves to form a first air guide arc surface (101), the portion which does not protrude forms a plane ring, the center of the second air guide sleeve (2) protrudes between the two air guide sleeves to form a second air guide arc surface (201) which is consistent with the first air guide arc surface (101) in size, a fixing column (4) is arranged at the arc top of the first air guide arc surface (101)/the second air guide arc surface (201), and a temperature.

2. The radiation shield with the flow guide surface for meteorological measurement according to claim 1, wherein: the diameter of the first air guide arc surface (101) is equal to 1/2 of the diameter of the first air guide sleeve (1).

3. The radiation shield with the flow guide surface for meteorological measurement according to claim 1, wherein: the heat insulation columns (3) are uniformly distributed on the circumferential direction of the plane circular ring parts of the two air guide hoods at intervals, and the distribution angles are perpendicular to the two air guide hoods.

4. The radiation shield with the flow guide surface for meteorological measurement according to claim 1, wherein: the temperature sensor probe (5) is positioned at the center of the flow guide channel.

5. The radiation shield with the flow guide surface for meteorological measurement according to claim 1, wherein: the surfaces of the first air guide sleeve (1) and the second air guide sleeve (2) are plated with light reflecting materials.

6. The radiation shield with the flow guide surface for meteorological measurement according to claim 5, wherein: the reflective material may be silver, nickel or aluminum.