A multi-stage air-assisted ultra-high grain pile sampling device

Abstract

This invention relates to the field of grain sample collection tools, specifically to a multi-stage supplemental air-supported ultra-high grain pile sampling device, comprising: a plurality of sampling tubes for communicating with a negative pressure generating device and drawing grain to the negative pressure generating device; and a supplemental air pipe for supplying air to the suction ports of the plurality of sampling tubes; the plurality of sampling tubes are arranged circumferentially around the supplemental air pipe and are all fixedly connected to the supplemental air pipe; a plurality of air outlets are spaced apart on the supplemental air pipe for supplying air from the supplemental air pipe to the suction ports of the plurality of sampling tubes; the lengths of the plurality of sampling tubes increase sequentially and correspond one-to-one with the plurality of air outlets. This invention introduces air into the vicinity of the suction ports of the sampling tubes through the supplemental air pipes, enabling the sampler to draw grain from deep within the grain silo.

Description

Technical Field

[0001] This invention relates to the field of grain sample collection tools, and more specifically, to a multi-stage air-assisted ultra-high grain pile sampling device. Background Technology

[0002] In recent years, with the continuous advancement of technology, large-capacity silos such as vertical silos, shallow circular silos, and tall flat silos have become the main types of silos when building new grain depots in various regions. The designed grain loading height ranges from tens of meters to hundreds of meters. However, the sampling depth of the deep samplers currently in use is generally within 10 meters. More powerful instruments can sample up to about 15 meters. But as the depth of the grain pile increases, on the one hand, it becomes increasingly difficult to insert the sampling tube, and on the other hand, the air is thinner at the depth of the grain pile, making it difficult to extract samples by wind. Limited by current sampling tools and methods, sampling in tall silos and ultra-tall grain piles presents significant challenges and difficulties for sampling personnel. Deep sampling is virtually impossible in silos 40-50 meters high. In grain quality management, the inability to obtain deep samples hinders timely monitoring of quality changes within the grain pile during storage. Furthermore, the data in inbound and outbound inspection reports cannot accurately represent the overall quality of the silo. In particular, uneven moisture distribution during storage leads to significant errors in calculating outbound losses. Currently, deep sampling of grain in tall silos remains an unsolved problem in the grain industry.

[0003] This paper proposes a practical approach to design a high-silo sampling system to address the problem of deep sampling in ultra-high grain piles. This would enable grain reserve managers to more accurately grasp quality changes during grain storage, thereby ensuring grain quality and safety and promoting industry development. Summary of the Invention

[0004] To address the technical problem that existing samplers cannot extract deep samples from ultra-high grain piles, the present invention aims to provide a multi-stage air-supplemented ultra-high grain pile sampling device. By introducing air into the area near the suction port of the sampling tube through an air supply pipe, the sampler can extract grain samples from deep within the grain silo.

[0005] The above-mentioned objective of the present invention is achieved through the following technical solution:

[0006] A multi-stage supplemental air-supported ultra-high grain pile sampling device includes: a plurality of sampling tubes for communicating with a negative pressure generating device and sucking grain to the negative pressure generating device, and a supplemental air pipe for supplying air to the suction ports of the plurality of sampling tubes; the plurality of sampling tubes are arranged circumferentially around the supplemental air pipe and are all fixedly connected to the supplemental air pipe; a plurality of air outlets are provided at intervals on the supplemental air pipe for supplying air in the supplemental air pipe to the suction ports of the plurality of sampling tubes; the lengths of the plurality of sampling tubes increase sequentially and correspond one-to-one with the plurality of air outlets.

[0007] Optionally, the suction port of some of the sample tubes is obliquely cut.

[0008] Optionally, a filter screen is provided on the air outlet of the air outlet component.

[0009] Optionally, a one-way valve core is provided inside the air outlet of the air outlet component; the filter screen is located at the output end of the one-way valve core.

[0010] Optionally, an installation plate is provided at the upper end of the make-up air pipe for installing a plurality of the sampling tubes and the make-up air pipe on the grain silo; the installation plate is fixedly connected to a plurality of the sampling tubes and the make-up air pipe respectively; a plurality of length identifiers corresponding one-to-one with the sampling tubes are provided on the installation plate.

[0011] Optionally, a discharge switching plate is slidably provided at the upper end of the air supply pipe; a plurality of sealing caps corresponding one-to-one with the sampling tubes and used to seal their discharge ports are provided on the lower end face of the discharge switching plate, and a discharge through hole is opened on one of the sealing caps; a discharge elbow is provided on the upper end face of the discharge switching plate; the discharge elbow is connected to the discharge through hole.

[0012] Optionally, the indicator arrow is located above the sealing cap that has a discharge through hole.

[0013] Optionally, a quick-release adapter is provided on the air inlet of the make-up air duct.

[0014] Optionally, it also includes the negative pressure generating device, which is a grain deep sampler, and the suction tube of the grain deep sampler is detachably connected to the discharge elbow.

[0015] Optionally, it may also include: a plurality of binding rings for securing the suction ends of the plurality of the sampling tubes together with the air supply tubes.

[0016] The present invention has at least the following beneficial effects: (1) For large grain silos of more than 15 meters, the sampling tube can extract grain samples located in the deep area, and multiple sampling tubes are concentrated and fixed around the air supply pipe, which can make the volume of the sampling device relatively small; (2) The end face of the suction port is designed as a slope, which increases the suction port area of ​​the sampling tube and facilitates the extraction of grain; (3) A filter screen is installed at the air outlet of the air outlet component to prevent grain from entering the air supply pipe and causing blockage; (4) A one-way valve is installed at the air outlet of the air outlet component. The core ensures that when sampling through the designated tube, the make-up air will not affect other outlets, and dust will not enter the make-up air tube; (5) The length identifier and indicator arrow are set to make it easy for the sampling personnel to understand the depth of the grain sampled by the sampling tube in the grain warehouse; (6) Multiple sealing caps and a sealing cap with a through hole are set on the discharge switching plate to facilitate the sampling personnel to switch the sampling depth; (7) A quick-release adapter is installed on the air inlet of the make-up air tube to facilitate the quick connection and disconnection of the make-up air tube and the compressed air source, and facilitate the sampling tube to absorb. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of region A in the middle;

[0019] Figure 3 yes Figure 1 Enlarged view of region B in the middle;

[0020] Figure 4 This is a partial structural schematic diagram I of the present invention;

[0021] Figure 5 This is a partial structural schematic diagram II of the present invention;

[0022] Figure 6 This is a partial front view of the present invention;

[0023] Figure 7 This is a partial cross-sectional view of the present invention.

[0024] In the diagram: 1. Sampling tube; 11. Inclined surface; 2. Make-up air pipe; 21. Quick-release adapter; 3. Air outlet; 4. Filter screen; 5. One-way valve core; 6. Mounting plate; 61. Length identifier; 7. Discharge switching plate; 71. Sealing cap; 711. Discharge through hole; 72. Discharge elbow; 73. Indicator arrow; 8. Binding ring. Detailed Implementation

[0025] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0026] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals.

[0027] A multi-stage air-assisted ultra-high grain pile sampling device, such as Figure 1-3 As shown, it includes: a plurality of sampling tubes 1 for communicating with a negative pressure generating device and sucking grain into the negative pressure generating device, and an air supply pipe 2 for supplying air into the suction ports of the plurality of sampling tubes 1; the plurality of sampling tubes 1 are arranged circumferentially around the air supply pipe 2 and are all fixedly connected to the air supply pipe 2; a plurality of air outlets 3 are provided at intervals on the air supply pipe 2 for supplying air in the air supply pipe 2 to the suction ports of the plurality of sampling tubes 1; the lengths of the plurality of sampling tubes 1 increase sequentially and correspond one-to-one with the plurality of air outlets 3.

[0028] In this embodiment, the sampling tube 1, the air supply pipe 2, and the air outlet 3 are all pre-embedded in the grain silo. Multiple sampling tubes 1 are fixed to the air supply pipe 2 by binding rings 8, achieving a reduction in volume. Alternatively, any existing connection method, such as welding, can be used for fixation. Each sampling tube 1, the air supply pipe 2, and the binding rings 8 should be tightly attached to each other to prevent grain particles from entering the gaps and causing damage due to prolonged storage. Glass glue can also be used to fill the gaps. Each sampling tube 1 has a different length; in this embodiment, there are five tubes with lengths of 9m, 13m, 17m, 21m, and 25m respectively. In practical applications, as many layers of samples are needed, several sampling tubes 1 of progressively increasing length are fixed to the air supply pipe 2, allowing for free combination and unrestricted sampling depth. The air outlet 3 is fixed to the air supply pipe 2 by existing fixing methods such as welding, and the air outlet channel of the air outlet 3 is connected to the interior of the air supply pipe 2. The suction port of sampling tube 1 can be flush with the air outlet of air outlet component 3 to achieve a connection, or the suction port of sampling tube 1 can be slightly higher than the air outlet of air outlet component 3 to achieve a connection. The air outlet of air outlet component 3 is directed towards the corresponding suction port of sampling tube 1, so that the area near the suction port of sampling tube 1 is filled with air, resulting in a high air pressure in the area near the suction port of sampling tube 1. Driven by the air pressure difference, the grain at the bottom of the grain silo can also be taken out by sampling tube 1, which facilitates subsequent inspection and analysis of the grain. In addition, an integrated elbow is installed at the bottom of the air supply pipe 2, or the bottom of the air supply pipe 2 is directly set as an elbow structure.

[0029] Sampling tube 1 and make-up air tube 2 are both rigid tubes that are not affected by the fumigation agents used for grain storage, such as metal tubes, PVC tubes, nylon tubes, etc. Stainless steel is preferred for ease of welding and to achieve better performance. PVC is preferred for lower manufacturing costs and easier installation.

[0030] When using, connect the outlet of any one of the sampling tubes 1 to the suction pipe of the negative pressure generating device (such as a deep grain sampler, not shown in the attached diagram), and turn on the suction.

[0031] Furthermore, the suction port of several of the sample tubes 1 is a slanted cut 11.

[0032] like Figure 3 As shown, the suction port of the sampling tube 1 is a slanted cut 11 or a V-shaped double slanted cut. The slanted cut 11 increases the suction port area of ​​the sampling tube 1, making it easier for more grain to enter its interior. The angle between the slanted cut 11 and the axis of the sampling tube 1 (i.e., the tilt angle) can be selected according to actual needs, generally 30°-45°.

[0033] Furthermore, a one-way valve core 5 is provided inside the air outlet of the air outlet component 3; the filter screen 4 is located at the output end of the one-way valve core 5.

[0034] like Figure 7 As shown, a one-way valve core 5 is installed in the air outlet channel of each air outlet component 3. The filter screen 4 is located on the air outlet side of the one-way valve core 5 to prevent grain particles from entering the air outlet channel of the air outlet component 3 and blocking the channel, thus affecting the use of the product. Because the air outlet component 3 is pre-embedded in the grain silo, a large amount of dust will float in the silo during the grain feeding period. The dust will enter the air supply pipe 2 through the filter screen 4 and affect the air supply effect. Because a large amount of dust will float in the silo during the grain feeding period, after installing the one-way valve core 5, when sampling through the designated pipe, it prevents the negative pressure from causing the dust in the grain to enter through other air supply ports.

[0035] Furthermore, an installation plate 6 is provided at the upper end of the air supply pipe 2 for installing a plurality of the sampling pipes 1 and the air supply pipe 2 on the grain silo; the installation plate 6 is fixedly connected to a plurality of the sampling pipes 1 and the air supply pipe 2 respectively; a plurality of length identifiers 61 corresponding one-to-one with the sampling pipes 1 are provided on the installation plate 6.

[0036] like Figure 2 and Figure 4As shown, the mounting plate 6 has multiple through holes. Multiple sampling tubes 1 and one air supply pipe 2 pass through the corresponding through holes (protruding 3-5 cm from the upper end face of the mounting plate 6) and are welded to the mounting plate 6. Corresponding length identifiers 61 are provided on the upper end face of the mounting plate 6. That is, a groove marked with the text "9m" is engraved in front of the sampling tube 1 with a length of 9m, indicating that the grain particles sampled by this sampling tube 1 are located at a depth of 9m in the grain silo; a groove marked with the text "13m" is engraved in front of the sampling tube 1 with a length of 13m, indicating that the grain particles sampled by this sampling tube 1 are located at a depth of 13m in the grain silo; other length identifiers 61 are provided accordingly.

[0037] Furthermore, a discharge switching plate 7 is slidably disposed at the upper end of the air supply pipe 2; a plurality of sealing caps 71 corresponding one-to-one with the sampling pipe 1 and used to seal its discharge port are disposed on the lower end face of the discharge switching plate 7, and a discharge through hole 711 is provided on one of the sealing caps 71; a discharge elbow 72 is disposed on the upper end face of the discharge switching plate 7; the discharge elbow 72 is connected to the discharge through hole 711.

[0038] like Figure 5 As shown, a through hole for the supplementary air pipe 2 to pass through is provided at the center of the discharge switching plate 7, so that the discharge switching plate 7 can slide up and down on the supplementary air pipe 2. Five sealing caps 71 are installed on the lower end face of the discharge switching plate 7. One of the sealing caps 71 has a discharge through hole 711 in the middle. When the sealing cap 71 with the discharge through hole 711 seals a sampling tube 1, that sampling tube 1 can absorb grain, while the other four sampling tubes 1 will not absorb grain. At the same time, only the one-way valve core 5 on the air outlet 3 corresponding to the sampling tube 1 that is absorbing grain will be in the conducting state, and the one-way valve cores 5 on the other air outlet 3 will be in the closed state, because the air will take a shortcut and choose to pass through the one-way valve core 5 with a large pressure difference (the pressure difference between the input end and the output end of the one-way valve core 5).

[0039] When it is necessary to extract grain at a depth of 9M, press the discharge switching plate 7 so that the sealing cap 71 with the discharge through hole 711 is fitted and fastened on the sampling tube 1 with a length of 9M, and the remaining sealing caps 71 are fitted and fastened on the sampling tube 1 of another length, so that the grain located at a depth of 9M in the grain silo can be extracted; when it is necessary to extract grain at a depth of 17M, slide the discharge switching plate 7 upward and rotate the corresponding angle so that the sealing cap 71 with the discharge through hole 711 is fitted and fastened on the sampling tube 1 with a length of 17M, and the remaining sealing caps 71 are fitted and fastened on the sampling tube 1 of another length, so that the grain located at a depth of 17M in the grain silo can be extracted.

[0040] Therefore, the above-mentioned discharge switching plate 7 is provided with multiple sealing caps 71 and a sealing cap 71 with a discharge through hole 711 to facilitate the sampling personnel to switch the sampling depth.

[0041] Furthermore, the indicator arrow 73 is located above the sealing cap 71, which has a discharge through hole 711.

[0042] like Figure 2 As shown, the arrow 73 points to the length identifier 61, indicating the depth of the grain being extracted.

[0043] Furthermore, a quick-release adapter 21 is provided on the air inlet of the air supply pipe 2.

[0044] like Figure 2 and Figure 4 As shown, when the pipeline is blocked, compressed gas (pressure above 1Kg) needs to be introduced into the make-up air pipe 2 to clear the blockage. If necessary, the sampling tube 1 can be assisted in drawing samples by introducing compressed air. For this purpose, a conventional quick-release adapter 21 is installed on the air inlet of the make-up air pipe 2. This quick-release adapter 21 is used to quickly connect or disconnect with the air pipe that delivers compressed air.

[0045] The above description is only a preferred embodiment of the present invention. The present invention is not limited to the above embodiments. Minor structural modifications may occur during implementation. If various modifications or variations of the present invention do not depart from the spirit and scope of the present invention and fall within the scope of the claims and equivalent technologies of the present invention, the present invention also intends to include these modifications and variations.

Claims

1. A multi-stage air-assisted ultra-high grain pile sampling device, characterized in that, include: The system includes several sampling tubes for connecting to a negative pressure generating device and drawing grain into the negative pressure generating device, and an air supply pipe for supplying air into the suction ports of the sampling tubes. The sampling tubes are arranged circumferentially around the air supply pipe and are all fixedly connected to the air supply pipe. Several air outlets are provided at intervals on the air supply pipe for supplying air from the air supply pipe to the suction ports of the sampling tubes. The lengths of the sampling tubes increase sequentially and correspond one-to-one with the air outlets. The suction port of some of the sample tubes is obliquely cut; A filter screen is provided on the air outlet of the air outlet component to prevent grain particles from entering the air supply pipe and causing blockage; A one-way valve core is provided inside the air outlet of the air outlet component; the filter screen is located at the output end of the one-way valve core; An installation plate is provided at the upper end of the air supply pipe for installing a plurality of the sampling tubes and the air supply pipe on the grain silo; the installation plate is fixedly connected to a plurality of the sampling tubes and the air supply pipe respectively; a plurality of length identifiers corresponding one-to-one with the sampling tubes are provided on the installation plate. A discharge switching plate is slidably arranged at the upper end of the air supply pipe; a plurality of sealing caps corresponding one-to-one with the sampling tubes and used to seal their discharge ports are provided on the lower end face of the discharge switching plate, and a discharge through hole is opened on one of the sealing caps; a discharge elbow is provided on the upper end face of the discharge switching plate; the discharge elbow is connected to the discharge through hole. A quick-release adapter is provided on the air inlet of the make-up air pipe.

2. The multi-stage supplementary air-supported ultra-high grain pile sampling device according to claim 1, characterized in that, An indicator arrow is provided on the discharge switching plate to indicate the length of the sampling tube. The indicator arrow is located above the sealing cap with the discharge through hole.

3. The multi-stage supplementary air-supported ultra-high grain pile sampling device according to claim 1, characterized in that, It also includes the negative pressure generating device, which is a grain deep sampler, and the suction tube of the grain deep sampler is detachably connected to the discharge elbow.

4. The multi-stage supplementary air-supported ultra-high grain pile sampling device according to claim 1, characterized in that, Also includes: Several binding rings for securing the suction ends of several of the sample tubes together with the air supply tubes.

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