Device for testing thermal insulation performance of mulching film

Abstract

The utility model discloses a mulching film thermal insulation performance testing device, which comprises a control panel, a constant temperature bottom plate, a soil sample groove and an isolation cover, the soil sample groove is used for filling soil and is arranged on the constant temperature bottom plate, the bottom of the isolation cover is opened, the isolation cover covers the soil sample groove, and the control panel is arranged on the control panel. The bottom of the isolation cover is in contact with the upper surface of the constant-temperature bottom plate, an air inlet and an air outlet are formed in the isolation cover, a bottom temperature sensor is arranged on the constant-temperature bottom plate in the soil sample tank, and an upper temperature sensor is arranged on the side wall of the isolation cover; the mulching film thermal insulation performance testing device overcomes the defects in the prior art, can simulate the influence of soil temperature and mulching film surface wind power, can effectively collect the temperature change of soil according to the data collected by the bottom temperature sensor, and can be used for testing the thermal insulation performance of the mulching film. The test on the heat insulation performance of the mulching film is realized.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation performance testing technology, specifically to a device for testing the thermal insulation performance of mulch film. Background Technology

[0002] Plastic mulch plays a vital role in agricultural production, increasing soil temperature, maintaining soil moisture, and suppressing weed growth, thereby promoting crop growth and increasing yield. Especially in cold regions or early spring, plastic mulch with good heat retention properties can significantly improve seed germination rates and crop root growth. For example, in the Beijing area, the advantages of plastic mulch in warming and retaining soil moisture cannot be replaced by other cultivation methods. Currently, there are no corresponding testing methods for the heat retention performance of plastic mulch in China. This invention provides a plastic mulch heat retention performance testing device and structure, which can meet the testing needs of enterprises and provide data-driven testing of the heat retention performance of plastic mulch. Utility Model Content

[0003] The purpose of this invention is to provide a testing device for the thermal insulation performance of mulch film, which overcomes the shortcomings of the prior art.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A device for testing the thermal insulation performance of mulch film includes a control panel, a constant temperature base plate, a soil sampling tank, and an isolation cover. The soil sampling tank is used to fill soil and is placed on the constant temperature base plate. The isolation cover has an opening at the bottom and covers the outside of the soil sampling tank, with the bottom of the isolation cover in contact with the upper surface of the constant temperature base plate. The isolation cover is provided with an air inlet and an air outlet. A bottom temperature sensor is provided on the constant temperature base plate inside the soil sampling tank, and an upper temperature sensor is provided on the side wall of the isolation cover. A lighting device is also provided on the upper part of the isolation cover.

[0006] The lighting device, constant temperature base plate, upper temperature sensor, and bottom temperature sensor are electrically connected to the control panel.

[0007] Furthermore, the lighting device uses a xenon lamp.

[0008] Furthermore, at least one bottom temperature sensor is provided, with the upper end of the bottom temperature sensor located inside the soil filling the soil sample tank.

[0009] Furthermore, the air inlet is located on the upper part of the left side of the isolation cover, and the air outlet is located on the lower part of the right side of the isolation cover.

[0010] Furthermore, the constant temperature base plate on the outside of the soil sample tank is also provided with a groove that matches the bottom of the isolation cover, and a silicone pad is installed in the groove.

[0011] Furthermore, the upper temperature sensor is installed on the inner wall of the isolation cover at the top of the soil sample tank.

[0012] Compared with the prior art, the implementation effect of this utility model is as follows: This mulch film insulation performance testing device can simulate the influence of soil temperature and wind force on the mulch film surface. At the same time, it can effectively collect data on soil temperature changes based on the data collected by the bottom temperature sensor, thereby realizing the testing of the mulch film insulation performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure after the plastic film is covered in the soil sample trench;

[0015] Figure 3 This is a cross-sectional view of the soil sampling trench after the mulch film has been applied.

[0016] Explanation of reference numerals in the attached diagram: 1. Constant temperature base plate; 2. Soil sample trough; 3. Bottom temperature sensor; 4. Isolation cover; 41. Air inlet; 42. Air outlet; 5. Upper temperature sensor; 6. Lighting device; 7. Mulch film; 8. Soil; 9. Silicone pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1-3 As shown, the thermal insulation performance testing device for the mulch film 7 of this utility model includes a control panel, a constant temperature base plate 1, a soil sample trough 2, and an isolation cover 4. The control panel is not shown in the figure. The soil sample trough 2 is used to fill soil 8 and is set on the constant temperature base plate 1. The constant temperature base plate 1 can be a commercially available temperature-adjustable constant temperature silicone heating plate. The bottom of the isolation cover 4 is open and covers the outside of the soil sample trough 2, and the bottom of the isolation cover 4 is in contact with the upper surface of the constant temperature base plate 1. Of course, if you want to improve the sealing effect between the constant temperature base plate 1 and the mulch film 7, a groove can also be set on the constant temperature base plate 1 outside the soil sample trough 2 to cooperate with the bottom of the isolation cover 4. A silicone pad 9 is installed in the groove. The silicone pad 9 can seal the bottom of the isolation cover 4. When the isolation cover 4 presses the mulch film 7 into the groove, it can improve the pressing effect of the isolation cover 4 on the mulch film 7 around the perimeter. A heavy object can also be placed at the bottom of the isolation cover 4 to further improve the sealing effect.

[0021] The isolation cover 4 is also equipped with an air inlet 41 and an air outlet 42. The air inlet 41 is located on the upper part of the left side of the isolation cover 4, and the air outlet 42 is located on the lower part of the right side of the isolation cover 4, so that the air inlet 41 and the air outlet can continuously refresh the air inside the isolation cover 4. The air inlet 41 is connected to a constant temperature blower, such as an air conditioner, so that the isolation cover 4 above the mulch film 7 always maintains a constant temperature and air flow. The constant temperature base plate 1 inside the soil sample tank 2 is equipped with a bottom temperature sensor 3. There are five bottom temperature sensors 3 in the figure. The upper end of the bottom temperature sensor 3 is located inside the soil 8 filled in the soil sample tank 2. The bottom temperature sensor 3 can effectively collect the temperature change of the soil 8.

[0022] An upper temperature sensor 5 is provided on the side wall of the isolation cover 4. The upper temperature sensor 5 is located on the inner wall of the isolation cover 4 above the soil sample tank 2. The upper temperature sensor 5 is used to monitor the temperature of the airflow inside the isolation cover 4. An illumination device 6 is also provided on the upper part of the isolation cover 4. The illumination device 6 uses a xenon lamp to simulate the effect of light. The illumination device 6, the constant temperature base plate 1, the upper temperature sensor 5, the bottom temperature sensor 3 and the control panel are electrically connected.

[0023] During use, remove the isolation cover 4, then fill the soil sample trough 2 with soil 8, and then cover the soil sample trough 2 with the mulch film 7 to be tested, ensuring that the edges of the mulch film 7 cover the area where the silicone pad 9 is located. Then, cover the outside of the soil sample trough 2 with the isolation cover 4, and press the mulch film 7 tightly against the silicone pad 9 at the bottom of the isolation cover 4. Then, set the temperature of the constant temperature base plate 1, the wind speed and temperature of the air inlet 41 according to the test requirements, and the test can begin. During the test, collect data from the upper temperature sensor 5 and the bottom temperature sensor 3 to evaluate the thermal insulation performance of the mulch film 7.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mulch insulation performance testing device, characterized by: The device comprises a control panel, a constant temperature bottom plate, a soil sample groove and an isolation cover, the soil sample groove is arranged on the constant temperature bottom plate, the isolation cover is open at the bottom, the isolation cover covers the outside of the soil sample groove, the bottom of the isolation cover is in contact with the upper surface of the constant temperature bottom plate, the isolation cover is provided with an air inlet and an air outlet, the constant temperature bottom plate in the soil sample groove is provided with a bottom temperature sensor, and the sidewall of the isolation cover is provided with an upper temperature sensor; the upper part of the isolation cover is further provided with an illumination device; The illumination device, the constant temperature bottom plate, the upper temperature sensor, the bottom temperature sensor and the control panel are electrically connected.

2. The device for testing the heat preservation performance of mulching film according to claim 1, characterized in that: The illumination device uses a xenon lamp.

3. The device for testing the heat preservation performance of mulching film according to claim 1, characterized in that: The bottom temperature sensor is provided with at least one.

4. The device for testing the heat preservation performance of mulching film according to claim 1, characterized in that: The air inlet is arranged on the upper part of the left side of the isolation cover, and the air outlet is arranged on the lower part of the right side of the isolation cover.

5. The device for testing the heat retention performance of mulching film according to claim 1, characterized in that: The constant temperature bottom plate outside the soil sample groove is further provided with a groove matched with the bottom of the isolation cover, and a silica gel pad is installed in the groove.

6. The device for testing the heat retention performance of mulching film according to claim 1, characterized in that: The upper temperature sensor is arranged on the inner wall of the isolation cover in the upper part of the soil sample groove.

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