Portable silicon core sampling box

Abstract

The utility model belongs to the technical field of silicon core transfer, and particularly relates to a portable silicon core sampling box which comprises a box body, a box cover and a box lock, the side edge of the box cover and the corresponding side face of the box body form rotatable connection through a hinge structure, and a sealing rubber strip structure is arranged on the edge of the top end of the box body and / or the edge of the bottom end of the box cover. The box lock is arranged on the box body and the box cover and is used for closing and locking the box cover and the box body; a plurality of storage grooves for placing silicon core pieces are formed in the box body, and a vacuumizing structure is arranged on the box body. Through the three core advantages of separated material storage, accurate environment control and portable and safe design, the problems of low management efficiency, material damage and environment failure caused by whole-bag transfer in the prior art are solved in a targeted manner, and convenient sampling, safe transfer and efficient management of silicon core pieces are realized; the method has an important practical value for processing precision parts in the fields of polycrystalline silicon production and semiconductor manufacturing.

Description

Technical Field

[0001] This utility model belongs to the field of silicon core transfer technology, specifically relating to a portable silicon core sampling box. Background Technology

[0002] A silicon core is a crucial component in polycrystalline silicon production and semiconductor manufacturing. Typically made of silicon, it requires extremely high precision. Silicon cores generally have specific size, shape, and surface quality requirements, providing a uniform surface for crystalline silicon deposition or serving as key components in the formation of precise electrodes and circuit structures for semiconductor devices.

[0003] However, factors such as oxidation and bacteria have a significant impact on the precision of silicon cores. Oxidation can increase the size and shape of silicon cores, worsen surface roughness and flatness, alter their electrical and mechanical properties, and compromise precision. Metabolic products from bacterial growth corrode silicon cores, causing surface contamination, clogging the microstructure, and thus affecting the size, shape, and surface precision of silicon cores, interfering with their normal function.

[0004] Under current technological conditions, multiple silicon cores are typically vacuum-sealed together and stored in a warehouse. When a silicon core needs to be retrieved for production or testing purposes, to maintain the required low-oxygen, sterile transfer environment, even if only one silicon core is needed per retrieval, the entire bag of silicon cores in a vacuum state must be transferred. This transfer method brings a series of significant problems. On the one hand, transferring the entire bag significantly increases the difficulty of material usage and storage management, making it difficult to accurately control the number of silicon cores used and the remaining inventory, easily leading to material waste or inventory shortages. On the other hand, the entire bag of silicon cores is at risk of damage during transport due to accidental factors such as collisions and compression, which in turn affects the normal conduct of subsequent testing and the accuracy of test results. Therefore, developing a portable device that enables convenient, safe, and sterile sampling and transfer of silicon cores is of great significance for solving existing technical problems and improving the efficiency of silicon core usage and management. Utility Model Content

[0005] The purpose of this invention is to provide a portable silicon core sampling box to provide a reliable storage and transportation environment for silicon cores.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A portable silicon core sampling box includes a box body, a box cover, and a box lock; the side of the box cover is rotatably connected to the corresponding side of the box body through a hinge structure, and a sealing strip structure is provided on the top edge of the box body and / or the bottom edge of the box cover; the box lock is provided on the box body and the box cover to close and lock the box cover to the box body; the box body is provided with several storage slots for placing silicon core components, and a vacuum structure is provided on the box body.

[0008] Preferably, it also includes a flexible connector, the two ends of which are connected to the box body and the box cover respectively, to limit the flipping angle of the box cover.

[0009] Preferably, the top of the lid is also provided with a handle, and the handle is hinged to the lid.

[0010] Preferably, a vacuum covering film is also provided at the bottom of the box lid.

[0011] Preferably, an ultraviolet lamp is also provided at the bottom of the box cover, and the control switch for the ultraviolet lamp is located at the top of the box cover.

[0012] Preferably, the lock adopts a snap-fit ​​structure, including a slot on the box body and a buckle rotatably mounted on the box cover. The buckle and the slot are elastically deformed to achieve a snap-fit ​​locking.

[0013] Preferably, the vacuuming structure includes a vacuum nozzle and a vacuum monitoring component; the vacuum nozzle is embedded in the housing, with its input end extending into the internal cavity of the housing and its output end exposed and provided with an external threaded connection for connecting to the vacuuming drive mechanism; the vacuum monitoring component is arranged in the housing and is used to detect the vacuum level of the internal cavity of the housing.

[0014] Preferably, the external threaded connection of the vacuum nozzle is provided with a silicone rubber sealing cap, and an O-ring is provided on the inner side of the silicone rubber sealing cap to match the output port of the vacuum nozzle.

[0015] Preferably, the vacuum monitoring component adopts a thin-film vacuum pressure gauge, which is installed in the cavity inside the box or in the connecting pipe of the vacuum pump nozzle. Its dial is exposed on the outside of the box through a transparent window to display the vacuum level of the cavity inside the box in real time.

[0016] Preferably, the material storage tank inside the box has an annular vacuum guide groove on its edge, and the annular vacuum guide groove is connected to the input end of the vacuum pump nozzle.

[0017] This technical solution has the following beneficial effects:

[0018] I. Precise Management and Flexible Access: Solving Material Management Challenges. Firstly, the independent storage compartment design: Multiple storage compartments inside the box allow for individual placement of silicon core components, overcoming the drawbacks of existing "whole bag transfer" technologies. Even when only one silicon core component needs to be retrieved at a time, it can be transferred safely and reliably, which is crucial for precise quantity management of silicon core components and avoids inventory chaos, material waste, or shortages caused by whole bag transfers. Secondly, the vacuum structure and sealing design: The box maintains a low-oxygen, sterile environment internally through sealing strips and a vacuum structure. Each silicon core component remains under uniform vacuum protection in its independent storage compartment, ensuring convenient single-item retrieval while maintaining the required storage environment. This eliminates the need for repeated vacuuming of entire bags of material, improving management efficiency.

[0019] II. Enhancing Transportation Safety and Reducing Damage Risk. Firstly, physical separation and cushioning protection: The storage compartments separate the silicon core components within the box, preventing direct contact damage from collisions and compression during transportation. This solves the problem of damage caused by friction or external impact on the entire bag of material in existing technologies. Secondly, a portable structural design: The handle, flexible connectors, and snap-lock design make the box easy to carry and allow for controlled opening and closing, reducing the risk of improper operation (such as excessive lid flipping causing silicon cores to fall) or seal failure during transportation, thus improving transportation safety.

[0020] III. Strengthening Environmental Control to Ensure Silicon Core Precision. Firstly, it efficiently maintains a low-oxygen, sterile environment: a sealing system consisting of sealing strips, vacuum nozzles, and silicone rubber sealing caps, combined with vacuum monitoring components, can monitor and maintain the internal vacuum level of the enclosure in real time, effectively preventing oxidation (dimensional distortion, deterioration of surface roughness) and bacterial contamination (metabolic corrosion, surface blockage), fundamentally solving the impact of environmental factors on silicon core precision in existing technologies. Secondly, it adds sterilization and protection functions: ultraviolet lamps at the bottom of the enclosure lid can sterilize the internal environment, further inhibiting bacterial growth; a vacuum-sealed film isolates the silicon core surface from the outside environment and fixes the silicon core, further improving sealing and surface protection. Multiple measures ensure that the silicon core maintains high precision requirements during storage and transportation.

[0021] IV. Structural Optimization and Operational Ease. Firstly, the modular and user-friendly design: snap-lock and hinged handles facilitate quick opening and closing and easy carrying; the transparent vacuum pressure gauge provides visual monitoring, allowing for confirmation of the internal environment without additional equipment, significantly improving operational convenience. Secondly, reliability and durability: the annular vacuum guide channel design optimizes the vacuuming efficiency within the chamber, ensuring uniform vacuum around each storage compartment; the combination of silicone rubber sealing caps and O-rings enhances the sealing of the suction nozzle, preventing leaks during long-term use and ensuring long-term reliable operation of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal structure of a portable silicon core sampling box.

[0023] Figure 2 This is a schematic diagram of the external structure of a portable silicon core sampling box.

[0024] in:

[0025] 1. Box body; 2. Box lid; 3. Card slot; 4. Buckle; 5. Hinge structure; 6. Sealing strip structure; 7. Material storage tank; 8. Flexible connector; 9. Handle; 10. Vacuum covering film; 11. Ultraviolet lamp; 12. Control switch; 13. Vacuum extraction nozzle; 14. Vacuum monitoring component; 15. Silicone rubber sealing cap; 16. Annular vacuum guide channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments.

[0027] Therefore, the following detailed description of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] This embodiment discloses a portable silicon core sampling box, which is a preferred implementation of this technical solution, and includes a box body 1, a box cover 2, and a box lock.

[0030] The enclosure 1 and the lid 2 can be made of lightweight, high-strength aerospace aluminum alloy frame, which is precision machined to achieve lightweight design while ensuring structural rigidity. The side of the lid 2 is rotatably connected to the corresponding side of the enclosure 1 through a hinge structure 5.

[0031] A sealing strip structure 6 is provided at the top edge of the box body 1 and / or the bottom edge of the lid 2. For example, a double labyrinth sealing structure can be set at the edges of the box body 1 and the lid 2, with a high-elasticity food-grade silicone rubber strip embedded inside, and radial compression sealing achieved by a stainless steel pressure strip. This structure can effectively isolate moisture and dust, forming a highly airtight space. At the same time, the rubber strip is designed to be detachable for easy maintenance and replacement. A lock is installed on the box body 1 and the lid 2 to lock the lid 2 tightly to the box body 1.

[0032] The housing 1 contains several storage slots 7 for placing silicon core components, and the housing 1 is equipped with a vacuum system. Different storage slots 7 can be designed for silicon core components of different shapes, such as… Figure 1 The storage tank 7 shown can be configured with a strip structure, which is suitable for placing silicon core beams. Furthermore, a buffer layer and anti-static mesh can be installed on the inner wall of the storage tank 7 to prevent the cylindrical silicon cores from colliding during transportation.

[0033] Based on the above structure, the working principle of the portable silicon core sampling box described in this embodiment is as follows: After placing the required number of silicon cores one by one into the storage tank 7, the box cover 2 and the box body 1 are closed and locked with the box lock. Thus, based on the presence of the sealing strip structure 6, the box body 1 and the box cover 2 cooperate to form a sealed cavity. Under this condition, a vacuum structure can be used to evacuate the sealed cavity. The vacuum sealing environment effectively inhibits the oxidation of silicon cores. Combined with the high-precision dustproof design, the cleanliness inside the box body 1 reaches the industry's high standard, providing ideal storage conditions for high-purity silicon cores and significantly reducing oxidation loss.

[0034] Example 2

[0035] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on Embodiment 1, it further includes a flexible connector 8. The flexible connector 8 can be a limiting rope or a limiting chain, that is, the flexible connector 8 can be made of high-strength nylon fiber rope or 304 stainless steel chain. The two ends of the flexible connector 8 are respectively fixed to the rear edge of the box body 1 and the corresponding position of the box cover 2 by detachable metal buckles, forming a mechanical limiting structure to avoid hinge fatigue damage caused by excessive opening and closing of the traditional hinge structure 5 or accidental flipping and impact of the box cover 2 on the ground.

[0036] Angle limitation: When the lid 2 is opened to the preset limit angle, the flexible connector 8 is straightened and bears tensile load, and the limiting force is transmitted to the frame of the box 1 through the rigid buckle, preventing further flipping. This design solves the stability problem of the pure hinge structure 5 at extreme opening angles, especially when operating on uneven outdoor ground or in confined spaces, and can prevent the risk of silicon core components colliding due to the lid 2 freely flipping under gravity.

[0037] Detachable design: It adopts quick-release metal buckle connection, and users can choose whether to install it according to the working scenario. In laboratory environments where the lid 2 needs to be fully opened, it can be temporarily removed to free up more operating space; when installed during field sampling or high-altitude operations, it ensures that the lid 2 is stably suspended, improving the safety of one-handed operation.

[0038] Example 3

[0039] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiment 1 or 2, a hinged foldable handle 9 is added to the center of the top of the box lid 2. The handle 9 is made of a lightweight, high-strength aluminum alloy frame and engineering plastic composite molding, and is connected to the top surface of the box lid 2 by a hidden stainless steel hinge. When unfolded, the handle 9 forms a 90° gripping angle with the plane of the box lid 2. When folded, it completely fits the surface of the box lid 2, which not only meets the portability requirements, but also avoids interference of the protruding structure with the sealing system.

[0040] Furthermore, the handle 9 can be covered with a wave-shaped anti-slip silicone sleeve, and the textured surface design increases friction when gripping, maintaining stability even when operating with gloves. The handle cross-section adopts an elliptical ergonomic design to fit the curvature of the palm.

[0041] Example 4

[0042] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiments 1, 2, or 3, a fully bonded vacuum covering film 10 (such as an antistatic polyester film or a food-grade silicone elastic film) is added to the bottom of the box cover 2. Its edges are seamlessly bonded to the corresponding area of ​​the sealing strip structure 6 of the box cover 2 through a hot-pressing process, forming a flexible fixing layer that can adapt to changes in air pressure. When the inside of the box 1 is evacuated, the vacuum covering film 10 is driven to recede based on the air pressure difference, realizing dynamic bonding and fixing of the silicon core, ensuring the vacuuming effect while preventing the silicon core from shaking.

[0043] Example 5

[0044] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiments 1, 2, 3, or 4, an ultraviolet lamp 11 is also provided at the bottom of the box cover 2. The power supply line of the ultraviolet lamp 11 is hidden in the box cover 2 and is powered by a micro lithium battery or an external USB-C interface, without affecting the folding and storage of the box cover 2 or the compression deformation of the sealing strip structure 6. The control switch 12 of the ultraviolet lamp 11 is located at the top of the box cover 2. When the box cover 2 is closed, the ultraviolet lamp 11 is above the silicon core, ensuring that the ultraviolet light evenly irradiates the surface of the silicon core while avoiding direct exposure to the operator.

[0045] The UV sterilization process can be operated independently under normal pressure or vacuum conditions. Normal pressure sterilization is suitable for pre-cleaning of the chamber 1 before sampling to remove environmental contaminants that may adhere during storage. Vacuum sterilization, combined with vacuuming, enhances the degradation effect of UV photons on residual organic matter in a low-oxygen environment, and is especially suitable for the pretreatment of high-purity silicon cores before long-term storage.

[0046] In this technical solution, the disinfection process is completed inside the sealed box 1, avoiding interference from the external environment on the sterilization effect. At the same time, the sealing strip structure 6 prevents secondary pollution after disinfection. The antistatic properties of the vacuum covering film 10 reduce dust adsorption, and the ultraviolet lamp 11 can penetrate the vacuum covering film 10 to disinfect the upper surface of the silicon core, forming a three-dimensional clean solution of "lower protection + upper sterilization". The control switch 12 is located next to the handle 9, and the disinfection can be started with one hand. Combined with the ergonomic design of the foldable handle 9, it improves the convenience of one-handed operation in the clean area while wearing gloves.

[0047] Example 6

[0048] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on any of embodiments 1-5, the box lock adopts a snap-fit ​​structure, including a barbed slot 3 on the box body 1 and a rotating buckle 4 on the box cover 2. The buckle 4 body can be made of PA66+GF30 engineering plastic, with a built-in stainless steel spring plate, and is installed on the box cover 2 through a damping pivot, enabling 90° rotational opening and closing. The locking tongue at the front end of the buckle 4 is an arc-shaped wedge surface. The buckle 4 and the slot 3 achieve a snap-fit ​​locking based on elastic deformation, that is, the barbed structure of the buckle 4 and the slot 3 forms a geometric interlock, and with the elastic reset of the spring plate, it ensures that there is no loosening gap after snapping.

[0049] Example 7

[0050] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on any one of embodiments 1-6, its vacuum structure includes a vacuum nozzle 13 and a vacuum monitoring component 14. The vacuum nozzle 13 (which can be an L-shaped sealing connector made of stainless steel, with the main body material being 316L stainless steel and mirror polished) is embedded in the box body 1. Its input end extends into the internal cavity of the box body 1 through a 90° bending structure to prevent airflow from directly blowing onto the silicon core during evacuation. The output end is exposed and has an external threaded connection for connecting to the evacuation drive mechanism. A fluororubber sealing ring (compression rate 20%) is used to achieve a high airtight connection, ensuring zero infiltration of outside air during evacuation. The vacuum monitoring component 14 is arranged in the box body 1 to detect the vacuum level of the internal cavity of the box body 1.

[0051] The suction drive mechanism can be manual or electric. If manual, it is equipped with a piston-type suction pump and includes a suction handle connected to the external thread of the vacuum nozzle 13. The handle has a built-in reciprocating piston assembly with piston rings made of wear-resistant PTFE material. A check valve is installed at the end of the piston stroke to prevent air backflow during suction. If electric, it integrates a miniature vacuum pump powered by a lithium battery pack embedded in the side wall of the housing 1. The pump body inlet of the miniature vacuum pump is connected to the external thread of the vacuum nozzle 13 via a negative pressure resistant silicone tubing.

[0052] This embodiment achieves key breakthroughs in three aspects: "vacuum control accuracy," "scenario adaptability," and "intelligent potential" through optimized sealing of the vacuum extraction nozzle 13, innovative design of the dual-mode drive mechanism, and integration of intelligent monitoring components. This solution not only strengthens the core vacuum protection function of the sampling box but also, through modular design and synergy with previous embodiments, provides a reliable, systematic solution for the sampling, transportation, and storage of high-purity silicon cores throughout the entire industry chain, particularly suitable for the increasingly stringent microenvironment control requirements of third-generation semiconductor materials.

[0053] Example 8

[0054] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiment 7, a detachable silicone rubber sealing cap 15 (which can be integrally molded from food-grade silicone rubber with a Shore hardness of 70A) is added to the external threaded connection of the vacuum nozzle 13. The inner side of the silicone rubber sealing cap 15 is precision injection molded with an O-ring sealing groove that matches the output port of the vacuum nozzle 13, and a fluororubber O-ring sealing groove is embedded inside to form a double sealing barrier.

[0055] The outer surface of the silicone rubber sealing cap 15 is designed with an anti-slip diamond pattern, which increases friction by 30% when operating with gloves. An airtight seal can be achieved by controlling the tightening torque to 0.8-1.2 N·m. The silicone rubber sealing cap 15 has a hanging hole at the tail, allowing it to be connected to the handle 9 of the box 1 via a nylon lanyard to prevent loss.

[0056] Static sealing state: When the air extraction drive mechanism is not connected, the silicone rubber sealing cap 15 is locked to the vacuum nozzle 13 through the external thread connection. The O-ring groove undergoes elastic deformation under radial pressure, filling the tiny gap between the vacuum nozzle 13 port and the silicone rubber sealing cap 15. Combined with the flexible wrapping of the silicone rubber sealing cap 15, a dual protection of "physical barrier + elastic seal" is formed.

[0057] Dynamic switching logic: When connecting the air extraction drive mechanism, rotate the silicone rubber sealing cap 15 counterclockwise to remove it. The O-ring on its inner wall separates from the air extraction nozzle port, which does not affect the quick docking of the air extraction nozzle and the pump body. After the air extraction is completed, first turn off the air extraction pump or manual pump check valve, and then tighten the silicone rubber sealing cap 15 clockwise to ensure that the vacuum degree inside the box 1 is not affected by external air pressure fluctuations (such as altitude changes during transportation).

[0058] Example 9

[0059] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiment 7 or 8, its vacuum monitoring component 14 adopts a mechanical diaphragm vacuum pressure gauge. The diaphragm vacuum pressure gauge is embedded in the internal cavity of the box 1 via a flange, or integrated into the connecting pipe of the vacuum pump nozzle 13. The dial of the diaphragm vacuum pressure gauge is covered with a 3mm thick acrylic transparent window. The edge of the transparent window is sealed to the outer wall of the box 1 with epoxy resin, forming an observation channel completely isolated from the internal cavity.

[0060] Example 10

[0061] This embodiment discloses a portable silicon core sampling box. As a preferred implementation of this technical solution, based on embodiments 7, 8, or 9, an annular vacuum guide groove 16 is formed on the edge of the storage tank 7 inside the box body 1. The annular vacuum guide groove 16 can be integrally machined into the aluminum alloy inner lining plate of the box body 1 using a CNC machine tool. The annular vacuum guide groove 16 surrounds the storage tank 7, forming a closed annular structure to ensure that air in each area of ​​the storage tank 7 can be effectively guided and discharged.

[0062] The annular vacuum guide channel 16 is connected to the input end of the vacuum ejector nozzle 13, ensuring that air in each storage tank 7 area is quickly discharged through the guide channel. When the suction drive mechanism is started, the vacuum ejector nozzle 13 begins to extract air from inside the housing 1. At this time, the air in the storage tank 7 rapidly converges towards the annular vacuum guide channel 16 under the action of pressure difference. Due to the annular structure of the annular vacuum guide channel 16, the air can flow evenly along the channel, avoiding the problem of local air stagnation. After the air gathers in the guide channel, it quickly flows towards the vacuum ejector nozzle 13 and is finally discharged from the housing 1.

Claims

1. A portable silicon core sampling box, characterized in that: It includes a box body (1), a box cover (2) and a box lock; the side of the box cover (2) is rotatably connected to the corresponding side of the box body (1) through a hinge structure (5); the top edge of the box body (1) and / or the bottom edge of the box cover (2) are provided with a sealing strip structure (6); the box lock is installed on the box body (1) and the box cover (2) to close and lock the box cover (2) tightly; the box body (1) is provided with several storage slots (7) for placing silicon core components, and the box body (1) is provided with a vacuum structure.

2. The portable silicon core sampling box as described in claim 1, characterized in that: It also includes a flexible connector (8), the two ends of which are connected to the box body (1) and the box cover (2) respectively, to limit the flipping angle of the box cover (2).

3. The portable silicon core sampling box as described in claim 1, characterized in that: The top of the box cover (2) is also provided with a handle (9), and the handle (9) is hinged to the top cover.

4. The portable silicon core sampling box as described in claim 1, characterized in that: The bottom of the box cover (2) is also provided with a vacuum covering film (10).

5. The portable silicon core sampling box as described in claim 1, characterized in that: The bottom of the box cover (2) is also provided with an ultraviolet lamp (11), and the control switch (12) of the ultraviolet lamp (11) is located on the top of the box cover (2).

6. The portable silicon core sampling box as described in claim 1, characterized in that: The lock adopts a snap-fit ​​structure, including a slot (3) opened on the box body (1) and a buckle (4) rotatably installed on the box cover (2). The buckle (4) and the slot (3) cooperate based on elastic deformation to achieve snap-fit ​​locking.

7. The portable silicon core sampling box as described in claim 1, characterized in that: The vacuum structure includes a vacuum nozzle (13) and a vacuum monitoring component (14). The vacuum nozzle (13) is embedded in the housing (1), with its input end extending into the internal cavity of the housing (1) and its output end exposed and provided with an external threaded connection for connecting the vacuum driving mechanism. The vacuum monitoring component (14) is arranged in the housing (1) and is used to detect the vacuum level of the internal cavity of the housing (1).

8. The portable silicon core sampling box as described in claim 7, characterized in that: The external threaded connection of the vacuum nozzle (13) is provided with a silicone rubber sealing cap (15), and an O-ring is provided on the inner side of the silicone rubber sealing cap (15) to match the output port of the vacuum nozzle (13).

9. The portable silicon core sampling box as described in claim 7, characterized in that: The vacuum monitoring component (14) adopts a thin-film vacuum pressure gauge. The thin-film vacuum pressure gauge is installed in the cavity inside the box (1) or in the connecting pipe of the vacuum pump (13). Its dial is exposed on the outside of the box (1) through a transparent window and is used to display the vacuum level of the cavity inside the box (1) in real time.

10. The portable silicon core sampling box as described in claim 7, characterized in that: The material storage tank (7) inside the box (1) has an annular vacuum guide groove (16) on its edge, and the annular vacuum guide groove (16) is connected to the input end of the vacuum pump nozzle (13).

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