A granary local air tightness detection device

Abstract

The utility model relates to the technical field of grain storage tools, specifically is a kind of local air tightness detection device of granary, it includes seal cover, the seal cover includes the panel of square, the bottom of panel is surrounded and is provided with side plate, the bottom surface of side plate is provided with sealant strip, pressure gauge air tap and suction air tap are provided on panel, pressure gauge is installed on pressure gauge air tap, and switch valve is installed on suction air tap, the top surface of panel is provided with handle. The local air tightness detection device of this granary structure design is ingenious, and the wall and window of granary can be used to carry out local air tightness detection.

Description

Technical Field

[0001] This utility model relates to the technical field of grain storage tools, specifically to a local airtightness detection device for grain storage. Background Technology

[0002] Grain often suffers from pest infestation and grain pile overheating during storage, leading to grain loss or quality degradation that renders it unsuitable for consumption. In traditional grain storage, phosphine fumigation is commonly used in grain depots to kill pests and ensure safe storage. However, phosphine fumigation leaves chemical residues in the grain and can harm the health of those performing the fumigation. Furthermore, long-term use of phosphine fumigation can cause stored grain pests to develop resistance.

[0003] With the continuous improvement of people's living standards, people are paying more and more attention to the living environment and have an increasing demand for high-quality, pollution-free green food. In order to ensure that stored grain is of high quality, fresh, environmentally friendly, and pollution-free, and to minimize losses during the grain storage process, grain storage technology is gradually developing towards green and ecological grain storage methods such as controlled atmosphere storage and low temperature storage. However, before controlled atmosphere storage, the airtightness of the grain silo needs to be tested. The airtightness of grain silos is usually tested using the pressure decay method. The traditional operation method is to connect a pressure blower to the grain silo, and a differential pressure gauge is connected to the silo with a latex tube. The operator controls the start and stop of the pressure blower by observing the differential pressure gauge data and uses a stopwatch to keep track of the time. This method has disadvantages such as being complicated to operate and time-consuming. When poor airtightness is found in the silo, it is not easy to identify the location of the leak. Therefore, it is necessary to design a local airtightness testing device for grain silos. Summary of the Invention

[0004] The purpose of this invention is to provide a local airtightness testing device for grain warehouses. This local airtightness testing device for grain warehouses has an ingenious structural design and can be used to conduct local airtightness testing on the walls and windows of grain warehouses.

[0005] This utility model is achieved using the following technical solution: A local airtightness testing device for grain silos includes a sealing cover. The sealing cover includes a square panel with side plates surrounding the bottom of the panel. Sealing strips are wrapped around the bottom of the side plates. A pressure gauge nozzle and a suction nozzle are installed on the panel. A pressure gauge is installed on the pressure gauge nozzle, and a switch valve is installed on the suction nozzle. Four handles are provided on the top surface of the panel, positioned front, back, left, and right.

[0006] A further preferred embodiment is that the pressure gauge nozzle and the suction nozzle are arranged diagonally on the panel to reduce the impact of air being drawn from the suction nozzle on the pressure gauge, so that the pressure value displayed by the pressure gauge is the actual pressure inside the sealing cover.

[0007] Further preferred: The panel and side panels are made of transparent acrylic sheets, which facilitates observation of the working conditions inside the sealing cover. The panel and side panels located inside the sealing cover are reinforced with triangular reinforcing ribs, making the connection structure between the panel and side panels more robust.

[0008] A further preferred embodiment: the bottom surface of the panel is provided with a reinforcing rib at the position corresponding to the handle.

[0009] A further preferred embodiment is that the bottom surface of the panel is provided with panel reinforcing ribs to improve the strength of the panel and prevent the panel from deforming under stress during air extraction, thus affecting the overall working condition.

[0010] This grain silo partial airtightness testing device has an ingenious structural design. It forms a sealed cover by surrounding the bottom of the panel with side plates, and a sealing strip is wrapped around the bottom of the side plates. The panel is equipped with a pressure gauge nozzle and a suction nozzle. A pressure gauge is installed on the pressure gauge nozzle, and a switch valve is installed on the suction nozzle. The sealed cover covers the wall / window of the grain silo that needs to be tested for airtightness. The sealing strip is pressed against the wall. The suction nozzle draws negative pressure to the set value, and the pressure half-life is observed. This completes the partial airtightness test of the grain silo's walls and windows. The testing operation is convenient. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of the local airtightness testing device for this grain warehouse; Figure 2 This is a schematic diagram of the internal structure of the local airtightness testing device for this grain warehouse; The names corresponding to the serial numbers in the figure are: 1. Sealing strip; 2. Side panel; 3. Front panel; 4. Handle; 5. Pressure gauge nozzle; 6. Pressure gauge; 7. Air extraction nozzle; 8. Switch valve; 9. Triangular reinforcing rib; 10. Handle reinforcing rib; 11. Front panel reinforcing rib. Detailed Implementation

[0012] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. The described embodiments are only a part of this utility model, and not all of them.

[0013] Example 1

[0014] A local airtightness testing device for grain silos includes a sealing cover. The sealing cover includes a square panel 3, with side plates 2 surrounding the bottom of the panel 3. Sealing strips 1 are wrapped around the bottom of the side plates 2. A pressure gauge nozzle 5 and a suction nozzle 7 are installed on the panel 3, arranged diagonally. A pressure gauge 6 is mounted on the pressure gauge nozzle 5, and a switch valve 8 is mounted on the suction nozzle 7. Four handles 4 are provided on the top surface of the panel 3, positioned front, back, left, and right.

[0015] The panel 3 and side panel 2 are made of transparent acrylic sheets, and triangular reinforcing ribs 9 are used to strengthen the connection between the panel 3 and side panel 2 located inside the sealing cover.

[0016] The bottom surface of the panel 3 is provided with a handle reinforcing rib 10 at the position corresponding to the handle 4. The bottom surface of the panel 3 is provided with a panel reinforcing rib 11.

[0017] The operating procedure of this local airtightness testing device for grain silos is as follows: The operator uses handle 4 to completely cover the wall / window of the grain silo requiring airtightness testing, presses the sealing strip 1 against the wall, connects the suction nozzle 7 to the negative pressure device, and opens the switch valve 8 to start the negative pressure device. When the pressure gauge 6 displays 600Pa, the negative pressure device is stopped, and the switch valve 8 is closed. Simultaneously, a timer is used. If, after three minutes, the pressure gauge 6 reading is not lower than 300Pa, the airtightness at that location is considered good; conversely, if the pressure gauge 6 reading is less than 300Pa after three minutes, the airtightness is poor. After the test, the negative pressure device is disassembled, and the switch valve 8 is opened to depressurize the sealing cover, which can then be separated from the wall for the next airtightness test. When encountering uneven walls where the sealing strip 1 cannot be pressed firmly against the wall, the wall must first be leveled with sealant.

[0018] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A device for detecting the local airtightness of a grain warehouse, characterized in that, The sealing cover includes a square panel (3), a side plate (2) is arranged around the bottom of the panel (3), a sealing strip (1) is provided on the bottom of the side plate (2), a pressure gauge nozzle (5) and a suction nozzle (7) are provided on the panel (3), a pressure gauge (6) is installed on the pressure gauge nozzle (5), a switch valve (8) is installed on the suction nozzle (7), and a handle (4) is provided on the top surface of the panel (3).

2. The grain warehouse local airtightness detection device according to claim 1, characterized in that, The pressure gauge nozzle (5) and the suction nozzle (7) are arranged diagonally on the panel (3).

3. The grain warehouse local airtightness detection device according to claim 1, characterized in that, The panel (3) and side panel (2) are made of transparent acrylic sheet.

4. The grain warehouse local airtightness detection device according to claim 3, characterized in that, The panel (3) and the side panel (2) are reinforced by triangular reinforcing ribs (9).

5. The grain warehouse local airtightness detection device according to claim 1 or 3, characterized in that, The bottom surface of the panel (3) is provided with a reinforcing rib (10) at the position corresponding to the handle (4).

6. The grain warehouse local airtightness detection device according to claim 1 or 3, characterized in that, The bottom surface of the panel (3) is provided with panel reinforcing ribs (11).

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