A vacuum packaging and storage device for granular silicon

Abstract

This utility model relates to the field of granular silicon storage technology and discloses a vacuum packaging and storage device for granular silicon, including a double-layer bag body. The inner wall of the double-layer bag body has a granular silicon storage cavity, and the outer wall of the double-layer bag body is provided with an air inlet and outlet assembly. The inner sample storage bag is a component made of ultra-clean polyethylene material, and the outer sample storage bag is a component made of polyester / aluminum / cast polypropylene composite barrier film material. The inner surface of the outer sample storage bag is provided with a dense mesh support. The inner vacuum isolates the sample from the outside environment, the outer composite film blocks the penetration of contaminants, and the interlayer argon gas provides buffer protection. The three elements work together to construct a full-chain protection system of contact cleanliness, penetration barrier, and impact buffer, ensuring safety during transportation. This solves the problem that although vacuum sealing of ordinary PE bags can isolate the outside environment to a certain extent, the corrosion resistance and barrier properties of PE material are limited, and it is still difficult to avoid sample contamination during long-term storage or transportation.

Description

Technical Field

[0001] This utility model relates to the field of granular silicon storage technology, and in particular to a vacuum packaging and storage device for granular silicon. Background Technology

[0002] Currently, there are two main methods for storing granular silicon: storage in ordinary self-sealing bags and vacuum sealing in ordinary PE bags. Because the analysis of granular silicon involves numerous and important items, it is necessary not only to ensure that samples are not contaminated before testing, but also to preserve them under stable environmental conditions for long-term traceability. Furthermore, for more representative samples used in nationwide benchmarking, it is crucial to ensure that long-distance transportation does not affect the samples. However, these existing protective measures have significant risks and shortcomings regarding contamination. Ordinary self-sealing bags cannot achieve effective sealing, allowing external dust and moisture to easily enter and contaminate the samples. While vacuum sealing in ordinary PE bags can isolate the samples to some extent, the corrosion resistance and barrier properties of PE material are limited, making it difficult to prevent sample contamination during long-term storage or transportation, thus failing to meet the stringent requirements for the storage and transportation of granular silicon samples. Utility Model Content

[0003] The technical problem to be solved by this utility model is that although the vacuum sealing of ordinary PE bags can isolate the outside world to a certain extent, the corrosion resistance and barrier properties of PE material are limited. During long-term storage or transportation, it is still difficult to avoid the sample being contaminated. Therefore, we propose a vacuum packaging and storage device for granular silicon.

[0004] To achieve the above objectives, this application adopts the following technical solution: a vacuum packaging and storage device for particulate silicon, comprising a double-layer bag body, wherein the inner wall of the double-layer bag body is provided with a particulate silicon storage cavity, and the outer wall of the double-layer bag body is provided with an air inlet and outlet assembly. The double-layer bag body includes an outer sample storage bag and an inner sample storage bag, wherein the inner sample storage bag is a component made of ultra-clean polyethylene material, and the outer sample storage bag is a component made of polyester / aluminum / cast polypropylene composite barrier film material, and a dense mesh support is provided on the inner surface of the outer sample storage bag.

[0005] Furthermore, a filling cavity is provided between the inner and outer sample storage bags, and the filling cavity is filled with an inert gas to form a micro-positive pressure protection. The inert gas is argon, and the micro-positive pressure is 30 kPa.

[0006] Furthermore, the air intake and exhaust assembly is located on the outer wall of the double-layer bag body, and an exhaust channel is provided at the center of the outer wall. A control block is rotatably connected to the outer wall of the outer wall, and a control rod is fixedly connected to one end of the control block. The control rod is threadedly connected to the inner wall of the exhaust channel. An air intake channel is provided on the upper wall of the outer wall, and a sealing block is movably installed at the opening of the air intake channel.

[0007] Furthermore, the end of the air extraction channel away from the control block penetrates the inner wall of the inner sample storage bag and connects to the particle silicon storage cavity.

[0008] Furthermore, the end of the air intake channel away from the sealing block penetrates the inner wall of the outer sample storage bag and connects to the filling cavity.

[0009] Furthermore, both the control block and the sealing block are components made of rubber.

[0010] The technical effects and advantages of this utility model are as follows: In this invention, the inner sample storage bag is made of ultra-clean polyethylene material that directly contacts the granular silicon. The chemical inertness of ultra-clean polyethylene ensures the cleanliness of the sample contact surface. The outer sample storage bag is made of polyester / aluminum / cast polypropylene composite barrier film. The high barrier properties of the aluminum layer block the penetration of external oxygen, water vapor, and corrosive substances. Combined with the inner dense mesh support to enhance impact resistance, it forms an outer physical protective barrier. The filling cavity between the two bags is filled with 30 kPa slightly positive pressure argon gas. On the one hand, the inertness of argon gas avoids chemical contamination. On the other hand, the slightly positive pressure forms a buffer cushion to reduce the impact of transportation vibration on the inner sample. At the same time, the pressure difference further prevents external gases from penetrating through the gaps in the membrane material. Therefore, by using the inner vacuum to isolate the sample from the outside environment, the outer composite membrane to block the penetration of pollutants, and the interlayer argon gas for buffer protection, the three work together to construct a full-chain protection system of contact cleanliness, penetration barrier, and impact buffer, effectively extending the clean storage time of the granular silicon sample and ensuring the safety during transportation. Attached Figure Description

[0011] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall planar structure of this utility model; Figure 3 This is a schematic diagram of the main structure of the double-layer bag of this utility model; Figure 4 This is a schematic diagram of the air intake and exhaust assembly structure of this utility model.

[0012] Legend: 1. Double-layer bag body; 2. Granular silicon storage chamber; 11. Outer sample storage bag; 12. Inner sample storage bag; 13. Filling chamber; 14. Mesh support; 3. Vacuuming assembly; 31. Outer block; 32. Vacuuming channel; 33. Control block; 34. Control rod; 35. Air inlet channel; 36. Sealing block. Detailed Implementation

[0013] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0014] Please see Figures 1-4 To address the issue that while vacuum sealing of ordinary PE bags can isolate samples from the outside environment to some extent, the corrosion resistance and barrier properties of PE material are limited, making it difficult to prevent sample contamination during long-term storage or transportation, the following preferred technical solutions are provided: A vacuum packaging and storage device for granular silicon includes a double-layer bag body 1. The inner wall of the double-layer bag body 1 has a granular silicon storage cavity 2. The outer wall of the double-layer bag body 1 is provided with an air inlet / extraction component 3. The double-layer bag body 1 includes an outer storage bag 11 and an inner storage bag 12. The inner storage bag 12 is made of ultra-clean polyethylene material, and the outer storage bag 11 is made of polyester / aluminum / cast polypropylene composite barrier film material. A dense mesh support 14 is provided on the inner surface of the outer storage bag 11 to enhance the structural strength. A filling cavity 13 is provided between the inner storage bag 12 and the outer storage bag 11. The filling cavity 13 is filled with an inert gas to form a micro-positive pressure protection. The inert gas is argon, and the micro-positive pressure is 30 kPa, forming a buffer protection layer.

[0015] The air intake and exhaust assembly 3 is installed on the outer wall of the double-layer bag body 1 on the outer block 31. An exhaust channel 32 is opened at the center of the outer block 31. A control block 33 is rotatably connected to the outer wall of the outer block 31. A control rod 34 is fixedly connected to one end of the control block 33. The control rod 34 is threadedly connected to the inner wall of the exhaust channel 32. An air intake channel 35 is opened on the upper wall of the outer block 31. A sealing block 36 is movably installed at the opening of the air intake channel 35. The end of the exhaust channel 32 away from the control block 33 passes through the inner wall of the inner sample storage bag 12 and connects to the particle silicon storage cavity 2. The end of the air intake channel 35 away from the sealing block 36 passes through the inner wall of the outer sample storage bag 11 and connects to the filling cavity 13. Both the control block 33 and the sealing block 36 are components made of rubber.

[0016] Specifically, the inner sample storage bag 12 is made of ultra-clean polyethylene material that directly contacts the particulate silicon. The chemical inertness of ultra-clean polyethylene ensures the cleanliness of the sample contact surface. The outer sample storage bag 12 uses a polyester / aluminum / cast polypropylene composite barrier film. The high barrier properties of the aluminum layer prevent the penetration of external oxygen, water vapor, and corrosive substances. Combined with the inner dense mesh support to enhance impact resistance, it forms an outer physical protective barrier. The filling cavity between the two bags is filled with 30 kPa slightly positive pressure argon gas. On the one hand, the inertness of argon gas avoids chemical contamination; on the other hand, the slightly positive pressure forms a buffer cushion to reduce the impact of transportation vibrations on the inner sample. The inner vacuum isolates the sample from the outside environment, while the outer composite membrane blocks the penetration of pollutants, and the interlayer argon gas provides buffer protection. These three elements work together to construct a complete protection system that ensures clean contact, prevents penetration, and buffers impacts. This effectively extends the clean storage time of particulate silicon samples and ensures safety during transportation. It also solves the problem that although vacuum sealing of ordinary PE bags can isolate the outside environment to a certain extent, the corrosion resistance and barrier properties of PE material are limited, making it difficult to avoid sample contamination during long-term storage or transportation.

[0017] The evacuation channel 32 is threaded into the inner wall of the channel via the control rod 34. Rotating the control block 33 enables the vacuuming operation of the silicon particle storage chamber 2. The rubber control block 33 fits tightly against the outer mounting block 31 after tightening, ensuring no air leakage after vacuuming. The air inlet channel 35 is controlled by inserting and removing the sealing block 36 to allow argon gas to enter. When the rubber sealing block 36 is closed, it can block the gas exchange between the filling chamber 13 and the outside world, maintaining a stable micro-positive pressure. The evacuation and air inlet channels are designed separately to avoid mutual interference between the inner vacuum and outer positive pressure operations, ensuring the independence of the two gas environments.

[0018] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A vacuum packaging storage device for particulate silicon, characterized by, The device includes a double-layer bag body, with a granular silicon storage cavity opened on the inner wall of the double-layer bag body and an air inlet / extraction component provided on the outer wall of the double-layer bag body. The double-layer bag body includes an outer sample storage bag and an inner sample storage bag. The inner sample storage bag is a component made of ultra-clean polyethylene material, and the outer sample storage bag is a component made of polyester / aluminum / cast polypropylene composite barrier film material. A dense mesh support is provided on the inner surface of the outer sample storage bag.

2. The vacuum packaging storage device for particulate silicon according to claim 1, characterized in that: A filling cavity is provided between the inner and outer sample storage bags. The filling cavity is filled with an inert gas to form a micro-positive pressure protection. The inert gas is argon, and the micro-positive pressure is 30 kPa.

3. The vacuum packaging storage device for particulate silicon according to claim 2, characterized in that: An air intake and exhaust assembly is installed on an outer block on the outer wall of the double-layer bag body. An exhaust channel is provided at the center of the outer block. A control block is rotatably connected to the outer wall of the outer block. A control rod is fixedly connected to one end of the control block. The control rod is threadedly connected to the inner wall of the exhaust channel. An air intake channel is provided on the upper wall of the outer block. A sealing block is movably installed at the opening of the air intake channel.

4. The vacuum packaging storage device for particulate silicon according to claim 3, characterized in that: The end of the air extraction channel furthest from the control block penetrates the inner wall of the inner sample storage bag and connects to the particle silicon storage cavity.

5. The vacuum packaging storage device for particulate silicon according to claim 4, characterized in that: The end of the air intake channel away from the sealing block penetrates the inner wall of the outer sample storage bag and connects to the filling cavity.

6. The vacuum packaging storage device for particulate silicon according to claim 5, characterized in that: Both the control block and the sealing block are components made of rubber.

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