CN217304827U - Concrete ultraviolet radiation resistance capability test case - Google Patents
Concrete ultraviolet radiation resistance capability test case Download PDFInfo
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- CN217304827U CN217304827U CN202123172800.6U CN202123172800U CN217304827U CN 217304827 U CN217304827 U CN 217304827U CN 202123172800 U CN202123172800 U CN 202123172800U CN 217304827 U CN217304827 U CN 217304827U
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Abstract
The utility model relates to the technical field of concrete anti-radiation aging performance detection, in particular to a concrete anti-ultraviolet radiation performance test box, which comprises a box body, wherein an irradiation cavity is arranged in the box body, two rows of lamp brackets which are arranged in a splayed shape are vertically arranged in the irradiation cavity, and a plurality of ultraviolet lamps are uniformly arranged on the lamp brackets at intervals; the inner side and the outer side of the lamp bracket are both provided with sample brackets for placing concrete samples; the inner side of the lamp holder is also provided with a frame, and the frame is provided with a shading film. The utility model provides a test box, in the environment of inside simulation ultraviolet irradiation, with the concrete sample set up the irradiation in this environment, be convenient for carry out the ageing test of anti-irradiation to it to can provide the reference for the concrete construction material selection in high ultraviolet irradiation area, avoid the improper building element who leads to after the construction of material selection to age at the excessive speed and finally cause the loss.
Description
Technical Field
The utility model relates to a concrete anti-irradiation aging performance detects technical field, concretely relates to concrete anti ultraviolet radiation capability test case.
Background
In southwest areas, particularly in Qinghai-Tibet plateau areas, the average altitude is high, the air is thin, the solar radiation is strong, the sunshine time is long, the atmospheric layer absorbs and reflects less solar radiation, and concrete building components are irradiated by ultraviolet rays for a long time under the direct sunlight condition, so that the surface degradation phenomenon of concrete is serious. In order to ensure the reliability of the concrete building in the using process, the ultraviolet radiation resistance of the concrete needs to be tested, so that the concrete with higher radiation aging resistance is selected as a construction material in a high-radiation area.
At present, a mature and reliable ultraviolet irradiation aging test device does not exist, and the requirement for detecting the anti-irradiation aging capability of concrete cannot be met, so that a device for detecting the concrete aging condition under the ultraviolet irradiation condition needs to be provided, the environment of ultraviolet irradiation is simulated, the concrete is positioned in the environment, and the aging condition of the concrete in the irradiation environment is observed and detected. In order to achieve the effect, a more reasonable technical scheme needs to be provided, and the defects in the prior art are overcome.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art defect mentioned in the above-mentioned content, the utility model provides a concrete anti ultraviolet radiation performance test box simulates ultraviolet irradiation environment in this box, arranges the concrete sample in this environment and tests, realizes the simulation of true ultraviolet irradiation and ageing to be convenient for survey the anti irradiation ageing properties of concrete in advance, select the material to provide the reference for actual construction.
In order to achieve the above object, the utility model discloses the technical scheme who specifically adopts is:
a concrete ultraviolet radiation resistance performance test box comprises a box body, wherein an irradiation cavity is formed in the box body, two rows of lamp brackets which are arranged in a splayed shape are vertically arranged in the irradiation cavity, and a plurality of ultraviolet lamps are uniformly arranged on the lamp brackets at intervals; the inner side and the outer side of the lamp holder are both provided with sample holders for placing concrete samples; the inner side of the lamp holder is also provided with a frame, and the frame is provided with a shading film.
According to the test box disclosed by the invention, the ultraviolet radiation is generated after the ultraviolet lamp is started, the surface of the concrete sample is irradiated, the aging degree of the sample can be observed and compared after the irradiation for a certain time, and thus the ultraviolet radiation aging resistance of the concrete is determined.
Further, the utility model discloses in, adjust lighting fixture and ultraviolet lamp for the ultraviolet ray that makes the intensity of radiation be close actual environment, the lighting fixture on the interval between the ultraviolet lamp be 90 ~ 110 mm.
Still further, the settings of the lamp holder and the sample holder are continuously optimized, and the following possible options are provided: the sample rack is arranged in parallel with the lamp rack, and the distance between the sample rack and the lamp rack is 36-44 mm. When adopting such scheme, make the ultraviolet lamp on the lighting fixture shine both sides simultaneously, can carry out the detection of more samples simultaneously.
Further, in the present invention, the frame is used to assist in placing the sample, where the structure of the frame is optimized and one of the following possible options is presented: the frame on be provided with the lateral part that is on a parallel with the lighting fixture, the inboard sample frame of lighting fixture is fixed in the lateral part, filters other clutter, ensures that its luminous spectral energy is mainly concentrated in 340 nm's wavelength.
Further, the utility model discloses in, the photomask is used for sheltering from the ultraviolet ray, and the optimal setting is carried out here: the shading film is arranged on the inner side of the frame and attached to the side part of the frame, and filters other noise waves to ensure that the luminous spectrum energy of the shading film is mainly concentrated at the wavelength of 340 nm.
Further, the utility model discloses in, in order to facilitate the observation and set up the sample, optimize the setting here: the box body is provided with an openable box door. When adopting such scheme, the edge of chamber door sets up the sealing strip, realizes sealed after closing the chamber door, prevents that the inside ultraviolet radiation of box from leaking outward.
Further, the structure of the box body is optimized here: the side surface of the box body is parallel to the lamp bracket, and the box door is arranged on the side surface. When the scheme is adopted, the reflecting layer can be arranged on the inner surface of the box body, light emitted by the ultraviolet lamp is reflected, and the irradiation intensity of a sample is increased.
Still further, the frame is made of iron.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
the utility model provides a test box, in the environment of inside simulation ultraviolet irradiation, with the concrete sample set up the irradiation in this environment, be convenient for carry out the ageing test of anti-irradiation to it to can provide the reference for the concrete construction material selection in high ultraviolet irradiation area, avoid the improper building element who leads to after the construction of material selection to age at the excessive speed and finally cause the loss.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure of a test chamber.
In the above drawings, the meaning of each reference numeral is: 1. a box body; 2. a lamp holder; 3. an ultraviolet lamp; 4. a sample holder; 5. a box door; 6. concrete samples; 7. a frame.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
Examples
Aiming at the problem that concrete in the prior art is aged in different degrees under ultraviolet irradiation, a suitable aging test scheme is not provided at present, and the embodiment optimizes and provides an improved scheme to solve the problems in the prior art.
Specifically, as shown in fig. 1, the embodiment provides a concrete ultraviolet radiation resistance performance test box, which includes a box body 1, an irradiation cavity is arranged inside the box body 1, two rows of lamp holders 2 arranged in a splayed shape are vertically arranged in the irradiation cavity, and a plurality of ultraviolet lamps 3 are uniformly arranged on the lamp holders 2 at intervals; the inner side and the outer side of the lamp holder 2 are both provided with sample holders 4 for placing concrete samples 6; a frame 7 is further provided inside the lamp holder 2, and a light shielding film is provided on the frame 7.
The test box disclosed above irradiates the surface of a concrete sample by ultraviolet radiation generated after the ultraviolet lamp 3 is started, and can observe the aging degree of the sample after a certain period of irradiation and compare the aging degree, thereby determining the ultraviolet radiation aging resistance of the concrete.
In this embodiment, in order to make the intensity of radiation approach the ultraviolet of actual environment, adjust lighting fixture 2 and ultraviolet lamp 3 lighting fixture 2, lighting fixture 2 on the interval between the ultraviolet lamp 3 be 90 ~ 110 mm.
Preferably, the interval between the ultraviolet lamps 3 is set to 100mm in this embodiment.
The settings of the lamp holder 2 and the sample holder 4 are continuously adjusted and optimized, and the following feasible options are adopted in the embodiment: it is convenient that lighting fixture 2 and sample frame 4 be the straight bent, sample frame 4 and lighting fixture 2 parallel arrangement and the sample frame 4 and the interval between lighting fixture 2 be 36mm ~ 44 mm. When adopting such scheme, make ultraviolet lamp 3 on the lighting fixture 2 shine both sides simultaneously, can carry out the detection of more samples simultaneously.
Preferably, the distance between the sample holder 4 and the lamp holder 2 is set to 40mm in this embodiment.
In this embodiment, the frame 7 is used to assist in placing the sample, where the structure of the frame 7 is optimized and one of the following possible options is used: the frame 7 is provided with a side part parallel to the lamp holder 2, and the sample holder 4 on the inner side of the lamp holder 2 is fixed on the side part.
In the present embodiment, the light shielding film is used for shielding ultraviolet rays, and here, the optimal settings are made: the light shielding film is disposed inside the frame 7 and attached to the side of the frame 7.
In this embodiment, in order to facilitate observation and setting of the sample, an optimal setting is made here: the box body 1 is provided with an openable box door 5. When adopting such scheme, the edge of chamber door 5 sets up the sealing strip, realizes sealed after closing chamber door 5, prevents that the inside ultraviolet radiation of box 1 from leaking outward.
Preferably, the box door 5 adopts an upturning opening structure, and the sealing strip adopts a rubber strip.
In this embodiment, the structure of the case 1 is optimized: the side surface of the box body 1 is arranged in parallel with the lamp bracket 2, and the box door 5 is arranged on the side surface. When adopting such scheme, can set up the reflection stratum at the internal surface of box 1, reflect the light that ultraviolet lamp 3 sent, increase the irradiation intensity that the sample received.
Specifically, the frame 7 in this embodiment is made of iron.
In a practical case, the implementation is as follows:
annual exposure investigation in Tibet region
The total radiation amount of eastern areas of Qinghai-Tibet plateau is smaller, generally 5000-6000 mmJ/m 2 While the rest of the area is 6000mJ/m 2 The above. The area with the largest total solar radiation amount in China is in the south of the Tibetan province and is 8000-9000 mJ/m 2 。
Second, conversion of ultraviolet radiation quantity of test chamber
The irradiation intensity of ultraviolet light is inversely proportional to the square of the distance, and the theoretical irradiance T' in the ultraviolet aging box is 0.5-1.2W/m 2 The distance between the lamp tube and the concrete test piece is set to be 50mm, and the distance is calculated according to the following formula:
T＝T'/L 2
in the formula:
t-test irradiance, (W/m) 2 )；
T' -theoretical irradiance, (W/m) 2 )；
L is the distance (m) from the surface of the concrete sample to the lamp tube.
The test irradiance of the ultraviolet aging box can be obtained from the above steps and is 200- 2 。
According to the formula of the radiation amount:
T×t＝Q
in the formula:
t-test irradiance, (W/m 2);
t is test duration,(s); 3600*24/1000000
Q-amount of radiation, (MJ/m) 2 )。
The radiation quantity of the ultraviolet aging box per day is 17.3-41.5MJ/m 2 Under the natural condition, the daily average ultraviolet dose range of 16.5(6000) -21.2(8000) -24.6(9000) MJ/m in the south of Tibetan province is irradiated 2 . Therefore, the ultraviolet aging box can meet the requirements of irradiation intensity and irradiation amount in Tibet regions.
Third, determination of ultraviolet light source in box
In order to meet the requirement of ultraviolet radiation, a subject group determines that the ultraviolet aging box adopts a fluorescent ultraviolet lamp as a light source through comparison, analysis and demonstration, and the technical index of the light source is determined.
1. The technical requirements of the ultraviolet lamp tube are as follows:
1) lamp tube model: UVA-340
2) Length of the lamp tube: 600mm
3) Diameter: 26mm/32mm/38mm
4) Ultraviolet wavelength width: 340nm as main peak of 280-400 nm
5) Irradiance range: less than or equal to 5RME0 w/square meter
6) Lamp tube power: 20-40W
2. The ultraviolet lamp tube has the following functions:
1) the UVA-340 ultraviolet lamp is a high-quality light source simulating sunlight ultraviolet.
2) UVA-340 can simulate the sunlight spectrum in the critical short-wave wavelength range with the wavelength range of 315-400 nm, and the luminous spectrum energy of the UVA-340 is mainly concentrated at the wavelength of 340 nm. 3) The UVA-340 type ultraviolet lamp can simulate the situation after being irradiated by sunlight at noon in summer and has an emission peak at 340 nm.
Performance index of ultraviolet ageing oven
Technical requirements and parameters of the aging box are given by a subject group, the size of the inner volume of the box body is determined by combining the number of concrete test blocks, and the concrete test blocks are subjected to accelerated weather resistance test by simulating ultraviolet light in natural sunlight so as to obtain the purpose of researching the weather resistance of the sample.
TABLE 1 technical parameters table of aging box
The above embodiments are exemplified by the present embodiment, but the present embodiment is not limited to the above optional embodiments, and persons skilled in the art can obtain other various embodiments by arbitrarily combining the above embodiments, and any person can obtain other various embodiments based on the teaching of the present embodiment. The above detailed description should not be construed as limiting the scope of the present embodiments, which should be defined in the claims, and the description should be used for interpreting the claims.
Claims (8)
1. The utility model provides a concrete ultraviolet radiation resistance capability test case which characterized in that: the ultraviolet irradiation box comprises a box body (1), wherein an irradiation cavity is arranged in the box body (1), two rows of lamp brackets (2) which are arranged in a splayed shape are vertically arranged in the irradiation cavity, and a plurality of ultraviolet lamps (3) are uniformly arranged on the lamp brackets (2) at intervals; the inner side and the outer side of the lamp holder (2) are respectively provided with a sample holder (4) for placing a concrete sample (6); a frame (7) is further arranged on the inner side of the lamp holder (2), and a shading film is arranged on the frame (7).
2. The concrete ultraviolet radiation resistance performance test box of claim 1, characterized in that: the distance between the ultraviolet lamps (3) on the lamp holder (2) is 90-110 mm.
3. The concrete ultraviolet radiation resistance performance test box of claim 1 or 2, characterized in that: the lamp holder (2) and the sample holder (4) are straight bent frames, the sample holder (4) is arranged in parallel with the lamp holder (2), and the distance between the sample holder (4) and the lamp holder (2) is 36-44 mm.
4. The concrete ultraviolet radiation resistance performance test box of claim 1, characterized in that: the frame (7) is provided with a side part parallel to the lamp holder (2), and the sample holder (4) on the inner side of the lamp holder (2) is fixed on the side part.
5. The concrete ultraviolet radiation resistance performance test box of claim 4, characterized in that: the shading film is arranged on the inner side of the frame (7) and is attached to the side part of the frame (7).
6. The concrete ultraviolet radiation resistance performance test box of claim 1, characterized in that: the box body (1) is provided with an openable box door (5).
7. The concrete ultraviolet radiation resistance performance test box of claim 6, characterized in that: the side surface of the box body (1) is parallel to the lamp holder (2) and the box door (5) is arranged on the side surface.
8. The ultraviolet radiation resistance test box for concrete of claim 1, which is characterized in that: the frame (7) is made of iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123172800.6U CN217304827U (en) | 2021-12-16 | 2021-12-16 | Concrete ultraviolet radiation resistance capability test case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123172800.6U CN217304827U (en) | 2021-12-16 | 2021-12-16 | Concrete ultraviolet radiation resistance capability test case |
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| Publication Number | Publication Date |
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| CN217304827U true CN217304827U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123172800.6U Active CN217304827U (en) | 2021-12-16 | 2021-12-16 | Concrete ultraviolet radiation resistance capability test case |
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| CN (1) | CN217304827U (en) |
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