Solar radiation shielding device for measuring photochemical mineralization of litter

Abstract

The utility model relates to a solar radiation shielding device for measuring photochemical mineralization of litters, which aims to solve the technical problem that the existing device cannot effectively and accurately measure the photochemical mineralization, and adopts the technical scheme that a litter bag is of a sealing bag structure, the sealing bag is made of a polyethylene film, and a layer of light filtering film is sleeved on the inner side surface of the sealing bag; the light-transmitting type and the light-shading type are selected and used according to test requirements; the supporting device comprises an upper iron gauze and a lower iron gauze which are connected through hinges on one side and provided with connecting rods on the bottom face. The fixing device is of a regular rectangular pyramid structure, and a buckle is arranged on the side face and matched with the connecting rod in position. The rain shelter comprises a support, a flashing board fixing frame and a flashing board, the support is hinged to the fixing frame, the flashing board fixing frame is of a guide groove structure, and the flashing board is an acrylic board inserted into a guide groove. According to the utility model, the influence of microbial decomposition on the test can be avoided, the confusion of thermal decomposition and photodegradation effects is avoided, and the filter film is convenient to replace.

Description

TECHNICAL FIELD

[0001] The utility model belongs to litter decomposition test equipment technical field, concretely relates to a solar radiation shelter device for measuring litter photochemical mineralization. BACKGROUND

[0002] Solar radiation causes litter photodegradation, which plays an important role in litter carbon conversion process. The photodegradation caused by full-band solar radiation can be coupled with microbial degradation process, which has an important impact on litter decomposition and carbon turnover in various ecosystems. Under natural conditions, the abiotic decomposition caused by photochemical mineralization and the biodegradation caused by photoexcitation effect occur simultaneously, and it is an important issue in the field to distinguish the abiotic decomposition caused by photochemical mineralization and the biodegradation caused by photoexcitation effect. In order to distinguish the relative contribution of the two, two-stage test is generally used to make photochemical mineralization and microbial decomposition asynchronous. Among them, litter photochemical mineralization is measured by litter loss under field illumination and shading treatment. At present, there is some consensus on the illumination treatment method, such as generally using transparent polyethylene film that can pass almost all solar radiation λ>290nm for illumination treatment, and using orange polyester film that can attenuate UV and blue, green light λ>550nm for shading treatment. Compared with neutral density filter, the film has less impact on litter microenvironment such as litter temperature and relative humidity. However, there are few related field illumination treatment devices at present, and the production is relatively complex, and the use environment has certain limitations.

[0003] In order to accurately measure photochemical mineralization, the activity of microorganisms should be inhibited as much as possible during the photochemical mineralization stage of the illumination treatment in the field, so the device should reduce the interference of microbial decomposition. The conventional method includes sterilization treatment of litter before the experiment and rain shelter. In order to fully isolate the interference of water vapor condensation, the litter is sealed in a sealed box in some studies. It is found that the water vapor condensation at night may be very critical to microbial decomposition, so it is necessary to seal the litter. However, the sealed box may cause temperature rise, which may lead to confusion of thermal decomposition and photodegradation effect, so the test device should fully consider how to control the temperature rise. In addition, during the illumination treatment, the light filter film is often aged and its transmittance changes after being subjected to solar radiation for a long time, so it needs to be replaced regularly, so the test device should fully consider the convenient replacement operation. Finally, in the ecological system with relatively harsh environment, such as high altitude and high latitude area, the environmental conditions are relatively harsh, such as strong solar radiation, low temperature, strong wind, etc., and the device is easy to be damaged, so the adaptability of the device to the environment should be fully considered. In order to solve the above problems, a solar radiation shelter device for measuring litter photochemical mineralization is designed and invented to realize effective solar radiation shelter treatment and accurate photochemical mineralization measurement. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a solar radiation sheltering device for determining litter photochemical mineralization.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A solar radiation sheltering device for determining litter photochemical mineralization, comprising a litter bag, a supporting device, a fixing device and a rain shelter.

[0007] The litter bag is a sealed bag structure, and the sealed bag is made of transparent polyethylene film; a sealing strip is arranged at the opening of the sealed bag, and an optical filter film is sleeved in the sealed bag.

[0008] The supporting device comprises a lower iron wire mesh and an upper iron wire mesh, the size and shape of the lower iron wire mesh and the upper iron wire mesh are the same, one side of the lower iron wire mesh and the upper iron wire mesh is connected through a hinge, and the opposite side is connected through a buckle; a connecting rod is arranged at the bottom surface of the lower iron wire mesh.

[0009] The fixing device is a regular quadrangular pyramid structure, a plurality of groups of buckles are arranged on one side of the fixing device, each group of buckles comprises four buckles, and the position of each group of buckles matches the relative position of the connecting rod.

[0010] The rain shelter comprises four supports, two rain-shielding plate fixing frames and a rain-shielding plate, the top ends of the four supports are hingedly connected to the bottom surfaces of the two rain-shielding plate fixing frames, the two rain-shielding plate fixing frames are guide groove structures and are oppositely arranged, the rain-shielding plate is made of high-transparency acrylic plate and is inserted into the guide grooves, the rain-shielding plate is located directly above the fixing device, and the outer contour of the rain-shielding plate is larger than the outer contour of the bottom surface of the fixing device.

[0011] Further, the optical filter film comprises two types of light transmission type and light shielding type, and is selected and used according to test requirements.

[0012] Further, the side surface of the fixing device forms a 25° angle with the bottom surface.

[0013] Further, the bottom surface of the fixing device is provided with fixing legs.

[0014] Further, the lower end of the fixing leg and the support is a sharp cone structure.

[0015] Further, the two ends of the rain-shielding plate fixing frame are provided with end covers.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The utility model discloses a transparent polyethylene litter bag is arranged, can avoid the interference of microbial decomposition in photochemical mineralization test, can also avoid the confusion of the temperature rise caused by sealing and then leading to thermal decomposition and photodegradation effect, the combination of litter bag and supporting device can facilitate the replacement operation of the light filter film.

[0018] 2. The utility model discloses the setting of the inclined surface of fixing device can increase the litter acceptance solar radiation absorption amount, can also buffer airflow, resist gale impact simultaneously, make the device more stable.

[0019] 3. The utility model discloses the setting of rain shield can better resist the rainwater harassment of open country, adopt the higher and impact -resistant acrylic plate of transparency can better resist gale impact, and the assembly of plug -in mode and hinged mode is convenient for the installation and dismounting of device. DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is litter bag structure schematic diagram of the utility model;

[0022] Figure 3 It is the supporting device structure schematic diagram of the utility model;

[0023] Figure 4 It is the fixing device and rain shelter structure schematic diagram of the utility model;

[0024] In the drawing: 1, sealed bag, 2, light filter film, 3, sealing strip, 4, lower wire net, 5, upper wire net, 6, connecting rod, 7, fixing device, 8, buckle, 9, fixed foot, 10, support, 11, rain shield fixed frame, 12, rain shield, 13, end cover. DETAILED DESCRIPTION

[0025] The utility model will be further described below in connection with the drawings and examples.

[0026] As Figures 1-4 Shown, a kind of solar radiation sheltering device for determining litter photochemical mineralization, including litter bag, supporting device, fixing device 7 and rain shelter;

[0027] The litter bag is a sealed bag structure, the sealed bag 1 is made of 40 mu m thick transparent polyethylene film, a sealing strip 3 is arranged at the opening of the sealed bag 1, and an inner side is sleeved with a filter film 2; the filter film 2 includes a light transmission type and a light shielding type, the light transmission type filter film 2 made of transparent polyethylene film with a wavelength of 290 nm and a thickness of 70 mu m is selected in the light treatment test, and almost all solar radiation can pass through, and the light shielding type filter film 2 made of orange polyester film capable of attenuating UV and blue and green light (wavelength > 550 nm) is selected in the light shielding treatment test;

[0028] The support device includes a lower wire mesh 4 and an upper wire mesh 5, the lower wire mesh 4 and the upper wire mesh 5 are the same in size and shape, one side of the two is connected through a hinge, and the opposite side is connected through a buckle, so that the litter bag can be conveniently opened and replaced, and the lower wire mesh 4 is provided with a connecting rod 6 at the bottom surface of four corners;

[0029] The fixing device 7 is a regular quadrangular pyramid structure, the side surface and the bottom surface form an angle of 25 degrees, the impact of strong wind on the fixing device 7 is reduced to the maximum extent, one side surface of the fixing device 7 is provided with four groups of buckles 8, each group contains four buckles 8, the position of each group of buckles 8 matches the relative position of the connecting rod 6, four side surfaces are respectively directed to the east, the south, the west and the north when placed in the field, and the side surface provided with the buckle 8 is directed to the south, so that the litter bag can receive the maximum summer solar radiation, and the bottom surface is provided with a fixing leg 9 around, and the lower end is a pointed cone structure, so that the fixing device 7 is convenient to fix and install;

[0030] The rain shelter includes four supports 10, two rain board fixing frames 11 and a rain board 12, the lower end of the four supports 10 is a pointed cone structure, the top end is hingedly connected to the bottom surface of both ends of the two rain board fixing frames 11, on the one hand, the pointed cone structure is convenient for the support 10 to be inserted into the ground for installation, and on the other hand, the support 10 is hingedly connected with the rain board fixing frame 11, so that the rain shelter is convenient to fold and store, the two rain board fixing frames 11 are guide groove structures and the guide grooves are oppositely arranged, the rain board 12 is made of high-transparency acrylic plate, the light transmittance is 92%, and both sides are inserted into the guide grooves, the both ends of the rain board fixing frame 11 are provided with end covers 13 to prevent the rain board 12 from sliding out, the rain board 12 is located directly above the fixing device 7, and the outer contour of the rain board 12 is larger than the bottom surface outer contour of the fixing device 7.

[0031] The working process of the utility model is as follows:

[0032] When using this utility model, first collect the litter required for the test and put it into a sealed bag 1. For the light treatment test, use a filter film 2 made of transparent polyethylene film. For the light blocking test, use a filter film 2 made of orange polyester film. Place the filter film 2 inside the sealed bag 1 and use a sealing strip 3 to vent and seal the sealed bag 1, thus forming the litter bag used for the test. Open the lower wire mesh 4 and the upper wire mesh 5 along the hinge, place the prepared litter bag in the middle, close the lower wire mesh 4 and the upper wire mesh 5, and lock the opposite sides with buckles to support the litter bag.

[0033] Upon arrival at the test site, first fix the fixing device 7 with the fixed support leg 9, with the side with the buckle 8 facing due south. Then install the bracket 10 and the rain shield fixing frame 11 around the fixing device 7, insert the rain shield 12 into the guide groove of the rain shield fixing frame 11, and fasten the end cap 13.

[0034] Align the connecting rod 6 of the prepared support device with the buckle 8 on the fixing device 7 and fix it in place. Then the photochemical mineralization test can be carried out. Solar radiation shines on the litter bag through the rain shield 12. The rain shield 12 can protect the litter bag from rain and at the same time not weaken the influence of solar radiation. The side and bottom of the fixing device 7 are at a 25° angle, which can reduce the impact of strong winds on the litter bag. The litter bag is set with one side facing due south to receive the maximum summer solar radiation. The setting of the litter bag can avoid the influence of microbial decomposition on the test when conducting light exposure test in the field. At the same time, it can avoid the temperature rise caused by sealing, which would lead to confusion between thermal decomposition and photodegradation effects. The combination of the litter bag and the support device can facilitate the replacement of the filter membrane 2.

Claims

1. A solar radiation shelter for determining photochemical mineralization of litter, characterized in that, The litter bag, the supporting device, the fixing device (7) and the rain shelter are included. The litter bag is a sealed bag structure as a whole, the sealed bag (1) is made of transparent polyethylene film, the sealed bag (1) is provided with a sealing strip (3) at an opening, and a layer of light filter film (2) is sleeved inside. The supporting device includes a lower iron wire net (4) and an upper iron wire net (5), the lower iron wire net (4) and the upper iron wire net (5) are the same in size and shape, one side of the two is connected through a hinge, and the opposite side is connected through a buckle, and the lower iron wire net (4) is provided with a connecting rod (6) at the bottom surface of four corners. The fixing device (7) is a regular quadrangular pyramid structure, a plurality of groups of buckles (8) are arranged on one side of the fixing device (7), each group contains four buckles (8), and the position of each group of buckles (8) is matched with the relative position of the connecting rod (6). The rain shelter includes four supports (10), two rain-shielding plate fixing frames (11) and a rain-shielding plate (12), the top ends of the four supports (10) are hingedly connected to the bottom surfaces of two ends of the two rain-shielding plate fixing frames (11), the two rain-shielding plate fixing frames (11) are guide groove structures and the guide grooves are oppositely arranged, the rain-shielding plate (12) is made of high-transparency acrylic plate and is inserted into the guide grooves at two edges, the rain-shielding plate (12) is located directly above the fixing device (7), and the outer contour of the rain-shielding plate (12) is larger than the bottom surface outer contour of the fixing device (7).

2. A solar radiation shelter for measuring photochemical mineralization of litter according to claim 1, characterized in that, The light filter film (2) includes two types of light transmission type and light shielding type, and is selected and used according to test requirements.

3. A solar radiation shelter for measuring photochemical mineralization of litter according to claim 1, characterized in that, The side surface of the fixing device (7) forms a 25° angle with the bottom surface.

4. A solar radiation shelter for measuring photochemical mineralization of litter according to claim 1, characterized in that, The bottom surface of the fixing device (7) is provided with a fixing leg (9) around.

5. A solar radiation shelter for measuring photochemical mineralization of litter according to claim 4, characterized in that, The fixing leg (9) and the lower end of the support (10) are in a sharp cone structure.

6. A solar radiation shelter for measuring photochemical mineralization of litter according to claim 1, characterized in that, The two ends of the rain-shielding plate fixing frame (11) are provided with end covers (13). The two ends of the rain-shielding plate fixing frame (11) are provided with end covers (13).

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