Horizontal warehouse distributed multi-point warehousing system based on positive-pressure dense-phase pneumatic conveying

Abstract

The invention discloses a distributed multi-point warehousing system for a horizontal warehouse based on positive-pressure dense-phase pneumatic conveying. The distributed multi-point warehousing system comprises an air compressor system, a positive-pressure dense-phase pneumatic conveying system, a distributed multi-point warehousing system in the horizontal warehouse, a grain conveying pipeline and a matched valve device. The grain conveying speed is low, and abrasion is low; gas consumption is low, and efficiency is high; the material damage is small; separation is prevented, and uniformity is guaranteed; and long-distance conveying.

Description

Technical Field

[0001] This invention relates to a distributed multi-point storage system for flat warehouses based on positive pressure dense phase pneumatic conveying, belonging to the field of grain conveying and storage technology. Background Technology

[0002] Flat-roofed warehouses are the main type of grain storage in my country and are widely used in national grain reserves. Currently, the mainstream method for grain loading into flat-roofed warehouses involves a multi-unit work line, consisting of cleaning and conveying equipment, with a length of 10-20 meters. The terminal unit is often equipped with an inclined belt conveyor for grain dumping. During operation, the terminal equipment must be placed at the innermost part of the warehouse. As the grain pile rises, the entire work line must be manually stopped and moved to prevent equipment from being buried. Each movement involves coordinating multiple units to complete the loading process. The output is generally 50-100 tons per hour. After bulk grain is loaded, replenishment machines and manual leveling are still required. These mobile equipment often have disadvantages such as large footprint, high auxiliary workload, and inability to achieve centralized automatic control. Furthermore, frequent movement and adjustment of equipment during grain loading and unloading consumes a large amount of labor. In addition, the equipment requires on-site operation, resulting in a large amount of grain dust at the work site, creating a harsh working environment, making labor protection difficult, and reducing operational efficiency. Meanwhile, with the shortage of labor and the increasing requirements for labor and environmental protection, the current extensive methods of semi-mechanized bulk grain storage and manual leveling in flat warehouses are becoming increasingly unsuitable for the needs of the current economic development situation.

[0003] The grain pump truck disclosed in patent document CN221499902U mainly utilizes the principle of pneumatic conveying to transport grain, employing a vertically lifting pipe that extends into the grain silo window for loading and distribution. The disadvantages of this equipment are: it requires loading grain through the silo window, necessitating frequent movement of the pump truck and the telescopic pipe into the window. Furthermore, due to limitations in the location and number of windows at the loading point, it cannot ensure uniform grain distribution, resulting in grain grading.

[0004] Therefore, developing a mechanized and easily automated grain loading device for flat warehouses, as well as a device and operating method for uniform grain distribution, is of great significance for improving the modern management level of flat warehouses.

[0005] The principle of positive pressure dense phase pneumatic conveying is to utilize the energy of gas flow to transport materials to the target location. Air compressors and other equipment are used as the gas source to generate high-pressure gas. This high-pressure gas is introduced into a conveying tank (sump pump), where the material is thoroughly mixed with the high-pressure gas, forming a gas-solid two-phase flow. When certain pressure and conditions are reached, the material will be propelled forward in the pipeline in an agglomerated or embolized state. Throughout the conveying process, the driving force of the gas flow propels the material from the conveying source to the target location. During this process, the material is subjected to the force of the airflow, thus generating flow and achieving the purpose of conveying. The gas velocity is relatively low to ensure that the material remains concentrated and has a high density. Summary of the Invention

[0006] This invention provides a distributed multi-point grain loading system for flat warehouses based on positive pressure dense phase pneumatic conveying. Its purpose is to solve the technical problems of large space occupation of machinery and equipment, time-consuming and labor-intensive relocation, inability to achieve centralized automatic control and uniform material distribution in the process of grain loading in flat warehouses.

[0007] The technical solution of this invention is implemented as follows:

[0008] A distributed multi-point grain inlet system for flat warehouses based on positive pressure dense phase pneumatic conveying includes: an air compressor system, a positive pressure dense phase pneumatic conveying system, a distributed multi-point grain inlet system within the flat warehouse, grain conveying pipelines, and supporting valve devices; the air compressor system includes an air compressor 1, an air storage tank 2, and a control box 3; characterized in that...

[0009] The positive pressure dense phase pneumatic conveying system includes a transfer silo 5, a silo pump 4, and a conveying pipeline. The transfer silo is a closed silo located above the silo pump. It has at least a grain inlet 501 at its top, an air inlet on its upper side wall, and a grain outlet at its bottom, which is connected to the upper opening of the grain discharge pipe 503 via a silo bottom valve 504.

[0010] The silo pump 4 is a sealed, high-pressure resistant tank, with at least a grain inlet and an exhaust port at its top, an air inlet on its upper side wall, and an exhaust port at its bottom. The grain inlet at the top of the silo pump is connected to the lower end of the grain discharge pipe 503 via a silo pump feed valve 505. Pressurized gas from the gas storage tank 2 is connected to the air inlet at the silo pump via a first conveying pipeline 6, and a valve is provided at the air inlet. The exhaust port at the top of the silo pump is connected to the air inlet at the intermediate silo via a second conveying pipeline 602, and a valve is provided at the exhaust port. The exhaust port of the silo pump is connected to one end of the feeding pipeline 700 via a silo pump discharge valve 401. A vent valve 402 is provided on the upper part of the silo wall of the silo pump.

[0011] The distributed multi-point grain inlet system in the flat warehouse includes a flat warehouse 9, a main grain inlet pipe 800, and multiple branch grain inlet pipes 801 inside the warehouse, as well as a material distribution pipe 802 or material distribution trough connected to the discharge port set diagonally below or below the branch grain inlet pipes; the multiple branch grain inlet pipes are arranged in parallel at intervals.

[0012] The main feed pipe 800 is connected to multiple branch feed pipes 801 to form an input system.

[0013] The other end of the feeding pipeline 700 is connected to the feeding branch pipeline 701, which is equipped with a booster 702; the other end of the feeding branch pipeline 701 is connected to the main grain inlet pipe 800 for entering the warehouse.

[0014] The aforementioned distributed multi-point grain inlet system for flat warehouses based on positive pressure dense phase pneumatic conveying includes at least two sets of the positive pressure dense phase pneumatic conveying system sharing a single air compressor system to feed grain into multiple flat warehouses. Each set of positive pressure dense phase pneumatic conveying system connects its respective feeding pipelines 700 in parallel, and then connects to multiple feeding branch pipelines 701 equipped with boosters 702 via tees or crosses. Each feeding branch pipeline 701 connects to the main grain inlet pipe 800 of one flat warehouse. The conveying pipeline 6 of the air compressor system is connected to the air inlet 2 of its respective warehouse pump via two parallel branch conveying pipelines 603, and valves are installed thereon.

[0015] The aforementioned distributed multi-point grain inlet system for flat warehouses based on positive pressure dense phase pneumatic conveying includes a main grain inlet pipe 800 horizontally connected to and fixed to the wall of the flat warehouse, with a main valve installed at the grain inlet head. Multiple branch grain inlet pipes 801 connected to the main grain inlet pipe 801 have branch valves installed at their respective grain inlet heads. The material distribution pipe is a pipe body, and the material distribution trough is a trough body.

[0016] The aforementioned distributed multi-point grain inlet system for a flat warehouse based on positive pressure dense phase pneumatic conveying comprises a flat warehouse divided into two sides for double-sided grain inlet. Two main grain inlet pipes 800 are horizontally positioned at the center line of each side of the warehouse and extend outwards from both sides. Each main grain inlet pipe is connected to multiple branch grain inlet pipes 801, with a branch valve installed at its inlet end. A main valve is installed at the inlet end of the main grain inlet pipe 800 outside the warehouse. Each side outside the warehouse has an independent air compressor system and a positive pressure dense phase pneumatic conveying system connected to the main grain inlet pipe 800 via a feed branch line 701 equipped with a booster 702. The distribution pipe is a pipe body, and the distribution trough is a trough body.

[0017] The aforementioned distributed multi-point silo system for flat warehouses based on positive pressure dense phase pneumatic conveying, wherein the exhaust port of the silo pump at the top is connected to the air inlet of the transfer silo through a conveying pipeline 602, and a valve is provided at the exhaust port to form an air intake system from the silo pump to the transfer silo. Two sets of this system are symmetrically arranged on both sides of the silo pump.

[0018] The beneficial effects of this invention are: low speed and low wear in grain conveying; low gas consumption and high efficiency; minimal material damage; prevention of separation and uniformity; and long-distance conveying. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall connection structure of the single-sided grain feeding system for flat warehouses according to the present invention.

[0020] Figure 2 This is a schematic diagram of the overall connection structure of the present invention connecting multiple flat warehouse systems.

[0021] Figure 3 This is a schematic diagram of the distributed multi-point warehousing system within a bungalow warehouse according to the present invention.

[0022] Figure 4 This is a schematic diagram of the overall connection structure of the double-sided grain inlet system in the flat warehouse.

[0023] Figure 5 This is a schematic diagram of the fabric tube and fabric trough structure of the present invention.

[0024] Explanation of the attached drawing numbers:

[0025] Air compressor 1, air tank 2, control box 3, silo pump 4, silo pump discharge valve 401, vent valve 402, transfer silo 5, grain inlet 1 501, cover 502, grain discharge pipe 503, silo bottom valve 504, silo pump inlet valve 505, conveying pipeline 1 6, conveying pipeline 2 602, branch conveying pipeline 603, feeding pipeline 700, feeding branch pipeline 701, booster 702, flat warehouse 9, main grain inlet pipe 800, branch grain inlet pipe 801, distribution pipe 802. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] See Figure 1 As shown, the present invention discloses a distributed multi-point storage system for flat warehouses based on positive pressure dense phase pneumatic conveying, comprising: an air compressor system A, a positive pressure dense phase pneumatic conveying system B, a distributed multi-point storage system within the flat warehouse C, grain conveying pipelines, and supporting valve devices; the air compressor system includes an air compressor 1, an air storage tank 2, and a control box 3; the air compressor 1 is sequentially connected to the air storage tank 2 and the control box 3 via pipelines, outputting pressurized gas; wherein,

[0028] The positive pressure dense phase pneumatic conveying system includes a transfer silo 5, a silo pump 4, and a conveying pipeline. The transfer silo is a closed silo located above the silo pump. It has at least a grain inlet 501 at its top, an air inlet on its upper side wall, and a grain outlet at its bottom, which is connected to the upper opening of the grain discharge pipe 503 via a silo bottom valve 504.

[0029] The silo pump 4 is a sealed, high-pressure resistant tank, with at least a grain inlet and an exhaust port at its top, an air inlet on its upper side wall, and an exhaust port at its bottom. The grain inlet at the top of the silo pump is connected to the lower end of the grain discharge pipe 503 via a silo pump feed valve 505 to deliver grain to the silo pump. Pressurized gas from the gas storage tank 2 is delivered to the silo pump via a first-stage conveying pipeline 6 connected to the second-stage air inlet of the silo pump, with a valve at the second-stage air inlet. The exhaust port at the top of the silo pump is connected to the first-stage air inlet of the transfer silo via a second-stage conveying pipeline 602, with a valve at the exhaust port, to deliver pressurized gas to the transfer silo. The exhaust port of the silo pump is connected to one end of the feeding pipeline 700 via a silo pump discharge valve 401. A vent valve 402 is provided on the upper part of the silo pump wall.

[0030] See Figure 3 As shown, the distributed multi-point grain inlet system in the flat warehouse includes a flat warehouse 9, a main grain inlet pipe 800, and multiple branch grain inlet pipes 801 inside the warehouse, as well as a distribution pipe 802 or distribution trough connected to the discharge port located diagonally below or below the branch grain inlet pipes; the multiple branch grain inlet pipes are arranged in parallel at intervals; the distribution pipe 802 or distribution trough can be selected from existing technical structures;

[0031] The main grain inlet pipe 800 is connected to multiple branch grain inlet pipes 801 to form a warehousing system.

[0032] See Figure 1 As shown, the other end of the feeding pipeline 700 is connected to the feeding branch pipeline 701 equipped with a booster 702; the other end of the feeding branch pipeline 701 is connected to the main grain inlet pipe 800 for entering the warehouse.

[0033] See Figure 1 As shown, this is Embodiment 1 of the present invention. As described above, the air compressor system A, the positive pressure dense phase pneumatic conveying system B, and the distributed multi-point warehousing system C inside the flat warehouse are connected in sequence.

[0034] See Figure 2The diagram shows Embodiment 2 of a distributed multi-point grain inlet system for flat warehouses based on positive pressure dense phase pneumatic conveying according to the present invention. At least two sets of the positive pressure dense phase pneumatic conveying system are set up and share a common air compressor system to feed grain into multiple flat warehouses. Each set of positive pressure dense phase pneumatic conveying system connects its respective feeding pipelines 700 in parallel, and then connects to multiple feeding branch pipelines 701 equipped with boosters 702 via tees or crosses. Each feeding branch pipeline 701 connects to the main grain inlet pipe 800 of one flat warehouse. Each main grain inlet pipe is connected to multiple branch grain inlet pipes 801 and has a branch valve installed at its grain inlet end. A main valve is installed at the grain inlet end of the main grain inlet pipe 800 outside the warehouse. The conveying pipeline 6 of the air compressor system is connected to the air inlet 2 of its respective warehouse pump via two parallel branch conveying pipelines 603 and is equipped with a valve. The remaining system structure of Embodiment 2 is the same as Embodiment 1 and as described above, and will not be repeated here.

[0035] To further explain, the aforementioned distributed multi-point grain inlet system for flat warehouses based on positive pressure dense phase pneumatic conveying includes a main grain inlet pipe 800 horizontally connected and fixed to the wall of the flat warehouse, with a main valve installed at the grain inlet head. Multiple branch grain inlet pipes 801 connected to the main inlet pipe 801 have branch valves installed at their respective grain inlet heads. The distribution pipe is a pipe body, and the distribution trough is a trough body.

[0036] See Figure 4 The diagram shows Embodiment 3 of a distributed multi-point grain inlet system for a flat warehouse based on positive pressure dense phase pneumatic conveying, as described in this invention. The flat warehouse is divided into two sides for double-sided grain inlet. Two main grain inlet pipes 800 are horizontally positioned at the center line of each side and extend outwards from the warehouse. Each main grain inlet pipe is connected to multiple branch grain inlet pipes 801, with a branch valve installed at its inlet end. A main valve is installed at the inlet end of the main grain inlet pipe 800 outside the warehouse. Each side outside the warehouse has an independent air compressor system and a positive pressure dense phase pneumatic conveying system connected to the main grain inlet pipe 800 via a feed branch line 701 equipped with a booster 702. The distribution pipe is a pipe body, and the distribution trough is a trough body. The remaining system structures of Embodiment 3 are the same as in Embodiment 1 and as previously described, and will not be repeated here.

[0037] To further explain, the aforementioned distributed multi-point silo system for flat warehouses based on positive pressure dense phase pneumatic conveying includes a silo pump whose exhaust port at the top is connected to the air inlet of the transfer silo via a conveying pipeline 602. A valve is installed at the exhaust port to form an air intake system from the silo pump to the transfer silo. Two sets of this system can be symmetrically installed on both sides of the silo pump.

[0038] The fabric hose can be a T-joint structure, with the upper vertical main pipe connecting to two branch pipes at the bottom. See [link / reference]. Figure 3The diagram shows two branch pipes arranged in a V-shape, pointing diagonally downwards. These two branch pipes can be a pipe body, a trough body, or a combination of both.

[0039] The grain storage operation method of this invention:

[0040] 1. Before the grain is put into the warehouse, close all the valves inside the warehouse except for the valve at the farthest end from the grain inlet pipe (warehouse pump) outside the warehouse;

[0041] 2. Grain begins to enter the warehouse through the external feed pipe and the furthest internal valve. Using a vision system, once the grain reaches the predetermined grain level, the valve closest to this entry valve (the furthest one) is opened first, then the furthest valve is closed. Grain then begins to enter the warehouse through the newly opened valve; this process is repeated from the furthest valve to the nearest one.

[0042] 3. Repeat the above feeding operation until the feeding is completed at the valve closest to the grain feeding direction of the silo;

[0043] 4. Stop the grain elevator from conveying grain, and at the same time open the valve at the farthest end to blow away the grain remaining in the material pipes outside and inside the warehouse through airflow.

[0044] 5. Open the nearest valve and close the furthest valve. Use the airflow to blow away the grain remaining in the feed pipes inside the silo. Repeat this process from far to near.

[0045] External material pipes and internal grain conveying pipes can be made of either metal or non-metallic wear-resistant materials. Both metal and non-metallic pipes must adhere to the principles of anti-static properties and reliable grounding.

[0046] The conveying pipes inside the silo are round or square, and can be made of metal or non-metallic wear-resistant materials. Oval-shaped bottom discharge ports can be opened at certain intervals at the bottom of the feed pipes. Below the oval discharge ports, a manual adjustment plate is installed to adjust the size of the discharge port; these are existing technologies. Below the bottom discharge ports of the conveying pipes inside the silo, a distribution pipe or distribution trough is installed; this is also an existing structure. Figure 5 This is a type of structure. The sides of the conveying pipes inside the silo, spaced at certain intervals, may have discharge ports or may allow direct material discharge without the installation of a distribution pipe. The conveying pipes inside the silo must adhere to the principles of anti-static and reliable grounding.

[0047] For the grain conveying pipelines and associated valve devices outside the flat warehouse, electrically controlled gate valves are preferred.

[0048] Grain lifting devices include: inclined belt conveyors, scraper conveyors, screw conveyors, tubular chain conveyors, or bucket elevators.

[0049] Intensifiers are installed at specific locations along the grain transport pipeline, representing existing technology. These intensifiers, through intelligent and localized air replenishment, solve the core energy attenuation problem in long-distance, high-resistance transport, making them a key piece of equipment for achieving efficient, reliable, and energy-saving long-distance dense-phase transport.

Claims

1. A flat warehouse distributed multi-point warehousing system based on positive pressure dense-phase pneumatic conveying, comprising: The air compressor system, the positive pressure dense phase pneumatic conveying system, the warehouse-in distributed multi-point warehouse-in system of the flat warehouse, the grain conveying pipeline and the matched valve device, the air compressor system comprises an air compressor (1), an air tank (2) and a control box (3), characterized by The positive pressure dense phase pneumatic conveying system comprises a transfer bin (5), a bin pump (4) and a conveying pipeline, the transfer bin is a closed bin, is located above the bin pump, at least a first grain inlet (501) is arranged at the top of the transfer bin, a first air inlet is arranged on the upper end side wall of the transfer bin, and a first grain outlet is arranged at the bottom of the transfer bin and is connected with the upper opening of a grain discharging pipe (503) through a bin bottom valve (504); The bin pump (4) is a closed high-pressure-resistant sealed tank, at least a second grain inlet and an exhaust port are arranged at the top of the bin pump, a second air inlet is arranged on the upper side wall of the bin pump, and a discharge port is arranged at the bottom of the bin pump; the second grain inlet at the top of the bin pump is connected with the lower opening of the grain discharging pipe (503) through a bin inlet valve (505); pressure gas from the air tank (2) is connected with the second air inlet of the bin pump through a conveying pipeline I (6) and a valve is arranged at the second air inlet; the exhaust port at the top of the bin pump is connected with the first air inlet of the transfer bin through a conveying pipeline II (602) and a valve is arranged at the exhaust port; the discharge port of the bin pump is connected with one end of a feeding pipeline (700) through a bin outlet valve (401); a gas relief valve (402) is arranged on the upper part of the bin wall of the bin pump; The warehouse-in distributed multi-point warehouse-in system of the flat warehouse comprises a flat warehouse (9), a main grain inlet pipe (800), a plurality of sub-grain inlet pipes (801) in the warehouse, and a material distribution pipe (802) or a material distribution groove connected and communicated with a discharge port arranged obliquely below or below the sub-grain inlet pipes; the plurality of sub-grain inlet pipes are arranged in parallel and at intervals; The input system is formed by connecting a plurality of the sub-grain inlet pipes (801) on the main grain inlet pipe (800); The other end of the feeding pipeline (700) is connected with the feeding sub-pipeline (701) provided with a booster (702); the other end of the feeding sub-pipeline (701) is connected with the main grain inlet pipe (800) into the warehouse.

2. The horizontal warehouse distributed multi-point warehousing system based on the positive pressure dense phase pneumatic conveying according to claim 1, characterized in that, At least two sets of the positive pressure dense phase pneumatic conveying system are arranged and share one set of air compressor system to feed a plurality of flat warehouses; after the feeding pipelines (700) of each set of the positive pressure dense phase pneumatic conveying system are connected in parallel on the pipeline, a plurality of feeding sub-pipelines (701) provided with boosters (702) are connected through a three-way or four-way pipe; each feeding sub-pipeline (701) is connected with the main grain inlet pipe (800) of one flat warehouse into the warehouse; the conveying pipeline I (6) of the air compressor system is connected with the second air inlets of the bin pumps through two branched conveying pipelines (603) connected in parallel and provided with valves.

3. A horizontal silo distributed multi-point silo entry system based on positive pressure dense phase pneumatic conveying according to claim 1 or 2, characterized in that, The main grain inlet pipe (800) is horizontally connected with the wall of the flat warehouse, is fixed, is provided with a total valve at the grain inlet first end, a plurality of sub-grain inlet pipes (801) connected and communicated therewith are provided with sub-valves at the grain inlet first end; the material distribution pipe is a pipe body, and the material distribution groove is a groove body.

4. The horizontal silo distributed multi-point silo entry system based on the positive pressure dense phase pneumatic conveying according to claim 1, characterized in that, The flat warehouse is divided into two parts, and both sides are set as double-side grain inlet. Two main grain inlet pipes (800) are arranged in the middle line of the warehouse in horizontal direction and respectively pass through the two sides of the warehouse. Each main grain inlet pipe is respectively connected with multiple sub-grain inlet pipes (801) and is respectively provided with a sub-valve at the grain inlet end. A total valve is arranged at the grain inlet end of the warehouse outside part of the main grain inlet pipe (800). A set of air compressor system and positive pressure dense phase pneumatic conveying system is independently arranged on each side of the warehouse outside, and the main grain inlet pipe (800) is connected into the warehouse through the feeding branch pipeline (701) provided with a booster (702). The distribution pipe is a pipe body, and the distribution groove is a groove body.

5. The horizontal silo distributed multi-point silo entry system based on the positive pressure dense phase pneumatic conveying according to claim 1 or 2, characterized in that, The exhaust port of the warehouse pump at the top is connected with the air inlet one of the transfer bin through a conveying pipeline two (602), and a valve is arranged at the exhaust port to form an air inlet system of the warehouse pump to the transfer bin. The system is symmetrically provided with two sets on both sides of the warehouse pump.

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