Double tube valve controlled silo anti-classification anti-crushing directional ventilation device and operation method

Abstract

A kind of double-pipe valve-controlled silo anti-classification, anti-crushing, directional ventilation device and operating method, including grain transport pipe, ventilation pipe, silo, transfer silo, center grain inlet pipe, support sleeve, the side wall of center grain inlet pipe connected with transfer silo is connected ventilation pipe and in-silo feeding pipe, multiple partition valves are arranged on it at intervals;Ventilation pipe is equipped with ventilation valve;In-silo feeding pipe is equipped with discharge valve and in-silo distribution pipe;Transfer silo is equipped with grain inlet pipe valve, top distribution pipe and top distribution pipe valve, by controlling the opening and closing of top distribution pipe valve, grain inlet pipe valve, partition valve and discharge valve, silo is filled from bottom to top, ventilation pipe is ventilated to in-silo grain through center grain inlet pipe;The silo of the application avoids automatic classification and crushing when grain is fed, and after the end of grain filling, in-silo grain will not deteriorate due to poor ventilation.

Description

Technical Field

[0001] This invention relates to a dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device and its operation method, belonging to the field of grain storage and ventilation technology. Background Technology

[0002] Grain silos mainly include shallow circular silos, vertical silos, and steel silos. Due to their high degree of mechanization and small footprint, they have seen significant development and application in my country in recent years. Currently, most silos use a center-feed system. Because the distance between the central discharge outlet and the bottom of the silo is high, generally 20-50 meters, it inevitably leads to automatic grain grading (grain falls freely from top to bottom, naturally stratifying by particle size, weight, shape, impurities, etc.) and breakage, severely affecting grain quality and hindering safe storage. Severe grain grading can impair effective and uniform ventilation within the silo, leading to potential safety hazards such as material overheating, mold, sprouting, and spoilage during storage. Currently, a series of anti-grading and anti-breakage devices and equipment have emerged in China, such as: wall-mounted folding plate anti-breakage devices, pressure gate-type umbrella-shaped multi-point distributors, valve-controlled anti-grading devices, CNC rotary grain distributors, and multi-functional central pressure-reducing pipes. While the above devices and equipment can solve the problem of automatic grading and crushing of grain to a certain extent, they all have certain defects, such as unsatisfactory results, inability to simultaneously prevent grading and crushing, difficulty in maintenance, or safety hazards, such as high dust levels inside the storage area, which is a dust explosion hazard zone.

[0003] Furthermore, ventilation is an issue within the silos: because the grain layers stored in silos are typically higher than 20 meters, mechanical ventilation is extremely inefficient. Even with powerful centrifugal fans, ventilation and cooling are only effective up to about 3 meters above the grain and the bottom 3 meters. Ventilation and cooling are ineffective for the grain in the middle layers. Therefore, these technical problems still need to be addressed. Summary of the Invention

[0004] This invention provides a dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device and its operation method, which aims to solve the technical problems of grading and breakage during grain feeding in grain silos and the unsatisfactory ventilation effect of the middle layer of grain after the grain feeding ends.

[0005] The technical solution of this invention is implemented as follows:

[0006] A dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a grain transport pipe, a ventilation pipe, a silo, a transfer grain silo, a central grain inlet pipe, and a support sleeve; characterized in that...

[0007] The support sleeve 4 is a sleeve structure, which stands vertically in the middle of the silo, and its upper and lower ends are connected and fixed to the silo.

[0008] The central grain inlet pipe 3 is vertically installed inside the supporting sleeve. The top end of the central grain inlet pipe 3 is connected to the bottom outlet of the transfer grain silo 2, and a grain inlet pipe valve 301 is installed at this location. The central grain inlet pipe extends downwards to near the bottom of the silo. A grain inlet pipe support 307 is welded to the closed end of the central grain inlet pipe and supported and fixed to the bottom of the silo. The central grain inlet pipe is connected to the ventilation pipe 5 on the pipe wall below the grain inlet pipe valve. Multiple in-silo feeding pipes 303 are connected vertically and at intervals on the central grain inlet pipe wall below the ventilation pipe 5. The central grain inlet pipe 3 is connected to the inside of the silo. A shut-off valve 302 is installed above each of the silo feed pipes. The upper part of the ventilation pipe 5 extends from the top of the support sleeve 4 and the silo 6 to the outside of the silo and is equipped with a ventilation valve 501. The silo feed pipe 303 extends obliquely downward from the side wall of the support sleeve 4 and is located inside the silo. A discharge valve 304 is provided on the silo feed pipe. Multiple silo distribution pipes 305 are connected around the silo feed pipe 303 and the pipe wall below the discharge valve. They extend from the side wall of the support sleeve and are located inside the silo.

[0009] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device comprises a material distribution pipe fixing device 306 installed inside the silo feed pipe 303. The material distribution pipe fixing device 306 is a tubular structure with an annular flange at one end. The fixing device is fitted inside the silo feed pipe and communicates with it. The flange is fitted into a groove on a flange at one end of the silo feed pipe. At least four material distribution pipes are installed around the pipe wall of the fixing device and communicate with the inside of the pipe. They extend from the side wall of the silo feed pipe and the support sleeve and are located inside the silo. The flanges are bolted to the flange connecting plate of the central grain inlet pipe 3.

[0010] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device comprises a transfer grain silo 2 installed on the top of the silo and connected to a grain transport pipe outside the silo for transporting grain. Multiple sets of suspended top distribution pipes 201 are distributed and installed around the side wall of the transfer grain silo 2, and are suspended and supported by steel wire ropes 203 connected to the inner wall of the top of the silo 6. Each top distribution pipe 201 is equipped with a top distribution pipe valve 202, and multiple distribution pipe nozzles are distributed on the top distribution pipe.

[0011] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a nozzle valve installed on the material distribution nozzle.

[0012] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device comprises a support sleeve 4 consisting of multiple sleeve units connected together. Each sleeve unit has flanges at both ends of its pipe openings, which are then connected as a whole. Each sleeve unit has square channel holes 401 for installing sealing doors on its side wall, arranged in a row along the axial direction. The support sleeve 4 is fitted onto the outside of the transfer grain silo 2 and the central grain inlet pipe 3.

[0013] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device comprises a central grain inlet pipe whose end is obliquely bent to one side to form a bottom silo feed pipe 308, which extends through the side wall of the supporting sleeve and is located inside the silo. Multiple silo feed pipes 305 are arranged around the pipe wall, extending through the side wall of the supporting sleeve and located inside the silo. The bent portion at the end of the central grain inlet pipe forms a bottom closed end.

[0014] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes an internal feeding pipe installed on the wall of the central grain inlet pipe between the highest isolation valve and the grain inlet pipe valve.

[0015] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a transverse connecting device 402 between the central grain inlet pipe 3 and the supporting sleeve 4. The transverse connecting device 402 has a rod-shaped structure in the middle and arc-shaped surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device 402 are fixedly connected to the side walls of the central grain inlet pipe and the supporting sleeve by bolts.

[0016] This invention provides an operating method for a dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, characterized by comprising the following steps:

[0017] (1) Close all valves on the central grain inlet pipe and the in-silo feeding pipe, and transport the grain into the transfer grain warehouse through the grain conveying pipe at the top of the silo.

[0018] (2) Open the inlet valve between the transfer grain warehouse and the central grain inlet pipe, so that the grain falls onto the first isolation valve in the central discharge pipe; then open the first isolation valve, and the grain slides onto the second isolation valve, then open the second isolation valve, and the grain slides onto the third isolation valve; and so on, until the grain falls onto the lowest isolation valve.

[0019] (3) When the grain in the central grain inlet pipe is about half full, open the bottom layer partition valve and the grain falls into the bottom layer of the warehouse feeding pipe to start entering the warehouse. By controlling the valve, the amount of grain conveyed by the conveyor is kept basically consistent with the amount conveyed by the feeding pipe in the warehouse.

[0020] (4) When the height of the grain entering the silo is close to the discharge port of the bottom layer of the silo, first open the valve of the second-to-last layer of the silo's feeding pipe, then close the bottom partition valve of the central grain inlet pipe, and the grain will begin to enter the silo.

[0021] (5) When the height of the grain entering the silo is close to the discharge port of the feed pipe in the second-to-last layer of the silo, first open the valve of the feed pipe in the third-to-last layer of the silo, then close the isolation valve of the second-to-last layer of the central grain inlet pipe, and the grain will begin to enter the silo.

[0022] (6) Follow the above operation method and continue in this way until the valve of the uppermost layer of the warehouse feed pipe is opened and the isolation valve of the uppermost layer of the central grain inlet pipe is closed.

[0023] (7) When the height of the grain entering the silo is close to the discharge port of the top layer of the silo, open the valve of the top distribution pipe below the side of the transfer grain silo, and at the same time close the valve between the transfer grain silo and the central grain inlet pipe. The grain will start to enter the silo through the top distribution pipe. When the height of the grain in the silo reaches the specified entry height, the entry will end.

[0024] (8) When the grain layer needs ventilation, first close the grain inlet valve, open the isolation valve, then open the feed pipe valve in the grain layer that needs ventilation, open the valve on the ventilation pipe, turn on the ventilation equipment, and start ventilation.

[0025] (9) After ventilation is completed, first turn off the ventilation equipment, then close the feed pipe valve in the silo, close the isolation valve, and then close the ventilation pipe valve.

[0026] The operation method of the dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device involves controlling the opening and closing of the top distribution pipe valve, the grain inlet pipe valve, the isolation valve, and the discharge valve to ensure that the grain flows in a restricted manner and does not flow freely during the process of flowing through the central grain inlet pipe.

[0027] The beneficial effects of this invention are:

[0028] This invention features a central feed pipe connected to an internal feed pipe. By controlling the opening and closing of the top distribution pipe valve, the grain inlet pipe valve, the isolation valve, and the discharge valve, the grain is ensured to flow slowly downwards during the feeding process, preventing breakage. Simultaneously, the grain is fed from the bottom of the silo upwards, reducing grain grading. After feeding, because the ventilation pipe is connected to the central feed pipe, controlling the ventilation valves and equipment ensures good ventilation for the grain in the middle section. Attached Figure Description

[0029] Figure 1This is a front view schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0030] Figure 2 This is a front view schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0031] Figure 3 This is a partially enlarged schematic diagram showing the connection relationship between the support sleeve, the central grain inlet pipe, the in-warehouse feeding pipe, and the in-warehouse distribution pipe in this invention.

[0032] Figure 4 This is a top view schematic diagram showing the connection relationship between the support sleeve, the central grain inlet pipe, the in-warehouse feeding pipe, and the in-warehouse distribution pipe of the present invention.

[0033] Figure 5 This is a top view schematic diagram showing the connection relationship between the top material distribution pipe, ventilation pipe, and intermediate grain silo in this invention.

[0034] Figure 6 This is a schematic cross-sectional view (AA plane) showing the connection relationship between the top distribution pipe, ventilation pipe, central grain inlet pipe, and intermediate grain silo in this invention.

[0035] Figure 7 This is a top view schematic diagram showing the connection relationship between the in-warehouse feeding pipe, the in-warehouse distribution pipe, and the distribution pipe fixing device in this invention.

[0036] Figure 8 This is a BB-plane cross-sectional diagram showing the connection relationship between the in-warehouse feeding pipe, the in-warehouse distribution pipe, and the distribution pipe fixing device in this invention.

[0037] Figure 9 This is a front view schematic diagram of the connection relationship between the in-warehouse feeding pipe, the in-warehouse distribution pipe, and the distribution pipe fixing device in this invention.

[0038] Figure 10 This is a front view schematic diagram of the lateral connecting device of the present invention.

[0039] Figure 11 This is a side view schematic diagram of the lateral connecting device of the present invention.

[0040] Figure 12 This is a partial cross-sectional schematic diagram of the connection relationship between the two pipe units in this invention.

[0041] Attached Figure Numbers and Descriptions: 1. Grain Transport Pipe; 2. Transfer Grain Bin; 3. Top Distribution Pipe; 4. Top Distribution Pipe Valve; 5. Steel Wire Rope; 6. Central Grain Inlet Pipe; 7. Grain Inlet Pipe Valve; 8. Isolation Valve; 9. Inner Storage Feed Pipe; 10. Discharge Valve; 11. Inner Storage Distribution Pipe; 20. Distribution Pipe Fixer; 12. Grain Inlet Pipe Support; 13. Bottom Inner Storage Feed Pipe; 24. Support Sleeve; 35. Channel Hole; 46. Lateral Connection Device; 47. Sleeve Unit; 8. Ventilation Pipe; 9. Ventilation Valve; 10. Silo; 11. Detailed Implementation

[0042] The specific structure and embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] See Figure 1 , 2 As shown in Figure 9, the present invention provides a dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, which includes a grain transport pipe, a ventilation pipe, a silo, a transfer grain silo, a central grain inlet pipe, and a support sleeve.

[0044] The support sleeve 4 is a sleeve structure, which stands vertically in the middle of the silo, and its upper and lower ends are connected and fixed to the silo.

[0045] The central grain inlet pipe 3 is vertically installed inside the supporting sleeve. The top end of the central grain inlet pipe 3 is connected to the bottom outlet of the transfer grain silo 2, and a grain inlet pipe valve 301 is installed at this location. The central grain inlet pipe extends downwards to near the bottom of the silo. A grain inlet pipe support 307 is welded to the closed end of the central grain inlet pipe and supported and fixed to the bottom of the silo. The central grain inlet pipe is connected to the ventilation pipe 5 on the pipe wall below the grain inlet pipe valve. Multiple in-silo feeding pipes 303 are connected vertically and at intervals on the central grain inlet pipe wall below the ventilation pipe 5. The central grain inlet pipe 3 is connected to the inside of the silo. A shut-off valve 302 is installed above each of the silo feed pipes. The upper part of the ventilation pipe 5 extends from the top of the support sleeve 4 and the silo 6 to the outside of the silo and is equipped with a ventilation valve 501. The silo feed pipe 303 extends obliquely downward from the side wall of the support sleeve 4 and is located inside the silo. A discharge valve 304 is provided on the silo feed pipe. Multiple silo distribution pipes 305 are connected around the silo feed pipe 303 and the pipe wall below the discharge valve. They extend from the side wall of the support sleeve and are located inside the silo.

[0046] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a material distribution pipe fixer 306 installed inside the feed pipe 303 within the silo. (See also...) Figure 7 , 8 As shown in Figure 9, the feed pipe fixing device 306 is a tubular structure with an annular flange at one end. The feed pipe fixing device is fitted inside the feed pipe inside the silo and communicates with the feed pipe inside the silo. The flange is fitted into the groove on the flange two at one end of the feed pipe inside the silo. At least four feed pipes 305 inside the silo are installed around the pipe wall of the feed pipe fixing device and communicate with the inside of the pipe. They also pass through the side wall of the feed pipe inside the silo and the support sleeve and are located inside the silo. The flange one and two are bolted to the flange connecting plate of the central grain inlet pipe 3. The flange connection technology is a traditional technology and will not be described in detail.

[0047] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device is described in [reference needed]. Figure 1 As shown, the transfer grain silo 2 is installed on the top of the silo and connected to the grain transport pipe outside the silo to transport grain. Multiple sets of suspended top distribution pipes 201 are installed around the side wall of the transfer grain silo 2 and are connected to the inner wall of the top of the silo 6 by steel wire ropes 203 to suspend and support the top distribution pipes. Each top distribution pipe 201 is equipped with a top distribution pipe valve 202. Multiple distribution pipe nozzles are distributed on the top distribution pipes, preferably with the nozzle openings facing downwards, to facilitate grain distribution from multiple points.

[0048] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a nozzle valve on the feed nozzle for easy control of grain dispensing as needed.

[0049] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, wherein the supporting sleeve 4 is composed of multiple sleeve units connected together, each sleeve unit having flanges at both ends of the pipe, and the units are connected as a whole by the flanges. Figure 12 The support sleeve has square channel holes 401 for installing sealing doors on the side wall of each sleeve unit, and they are arranged in a row along the axial direction for easy inspection and maintenance. The support sleeve 4 is sleeved on the outside of the transfer grain silo 2 and the central grain inlet pipe 3.

[0050] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, wherein the end of the central grain inlet pipe is preferably bent to one side to form the bottom silo feed pipe 308, which is controlled by the isolation valve above it, and passes through the side wall of the support sleeve and is located inside the silo. Multiple silo feed pipes 305 are arranged around its pipe wall, and pass through the side wall of the support sleeve and are located inside the silo; the bent part at the end of the central grain inlet pipe forms the bottom closed end.

[0051] The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device preferably has an internal feeding pipe installed on the wall of the central grain inlet pipe between the highest isolation valve and the grain inlet pipe valve.

[0052] The aforementioned dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device includes a transverse connecting device 402 for support and fixation between the central grain inlet pipe 3 and the supporting sleeve 4. Figure 10 The transverse connecting device 402 has a rod-shaped structure in the middle and arc surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device 402 are fixedly connected to the central grain inlet pipe and the side wall of the support sleeve by bolts.

[0053] The present invention discloses an operating method for a dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, comprising the following steps: See [link to relevant documentation] Figure 1 As shown,

[0054] (1) Close all valves on the central grain inlet pipe and the in-silo feeding pipe, and transport the grain into the transfer grain warehouse through the grain conveying pipe at the top of the silo.

[0055] (2) Open the inlet valve between the transfer grain warehouse and the central grain inlet pipe, so that the grain falls onto the first isolation valve in the central discharge pipe; then open the first isolation valve, and the grain slides onto the second isolation valve, then open the second isolation valve, and the grain slides onto the third isolation valve; and so on, until the grain falls onto the lowest isolation valve.

[0056] (3) When the grain in the central grain inlet pipe is about half full, open the bottom layer partition valve and the grain falls into the bottom layer of the warehouse feeding pipe to start entering the warehouse. By controlling the valve, the amount of grain conveyed by the conveyor is kept basically consistent with the amount conveyed by the feeding pipe in the warehouse.

[0057] (4) When the height of the grain entering the silo is close to the discharge port of the bottom layer of the silo, first open the valve of the second-to-last layer of the silo's feeding pipe, then close the bottom partition valve of the central grain inlet pipe, and the grain will begin to enter the silo.

[0058] (5) When the height of the grain entering the silo is close to the discharge port of the feed pipe in the second-to-last layer of the silo, first open the valve of the feed pipe in the third-to-last layer of the silo, then close the isolation valve of the second-to-last layer of the central grain inlet pipe, and the grain will begin to enter the silo.

[0059] (6) Follow the above operation method and continue in this way until the valve of the uppermost layer of the warehouse feed pipe is opened and the isolation valve of the uppermost layer of the central grain inlet pipe is closed.

[0060] (7) When the height of the grain entering the silo is close to the discharge port of the top layer of the silo, open the valve of the top distribution pipe below the side of the transfer grain silo, and at the same time close the valve between the transfer grain silo and the central grain inlet pipe. The grain will start to enter the silo through the top distribution pipe. When the height of the grain in the silo reaches the specified entry height, the entry will end.

[0061] (8) When the grain layer needs ventilation, first close the grain inlet valve, open the isolation valve, then open the inlet feed pipe valve of the grain layer that needs ventilation, open the valve on the ventilation pipe, turn on the ventilation equipment connected to the ventilation pipe, and start ventilation.

[0062] (9) After ventilation is completed, first turn off the ventilation equipment, then close the feed pipe valve in the silo, close the isolation valve, and then close the ventilation pipe valve.

[0063] The operation method of the dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device describes a method that controls the opening and closing of the top feeding pipe valve, the grain inlet pipe valve, the isolation valve, and the discharge valve to ensure that the grain flows in a restricted manner during its flow through the central grain inlet pipe, preventing free flow. The grain flows slowly downwards in the central grain inlet pipe to prevent breakage. Simultaneously, the grain is fed from the bottom of the silo upwards, reducing grain grading. After feeding, because the ventilation pipe is connected to the central grain inlet pipe, controlling the ventilation valves and ventilation equipment ensures good ventilation for the grain in the middle section.

[0064] The specific embodiments of the present invention will be further described in detail below:

[0065] See Figure 1 The top distribution pipe is equipped with a valve in the area where it extends out of the support sleeve, which controls the top grain in the silo to be spread more evenly.

[0066] See Figure 1 , 3 Each sleeve unit 403 has a square channel hole 401 on its side wall, which is arranged in a row along the axial direction to facilitate installation and maintenance.

[0067] See Figure 5-6 The top distribution pipe 201 is installed on the side wall of the transfer grain silo 2. Preferably, two vertically arranged top distribution pipes 201 are arranged as a group, and a total of 4 groups are distributed along the circumference.

[0068] See Figure 6 The grain inlet valve is located between the ventilation pipe and the intermediate grain silo. When ventilation is required, the grain inlet valve is closed to isolate the grain in the intermediate grain silo from the ventilation pipe, preventing the grain not yet stored from being affected. The transverse connecting device 402 has a rod-shaped structure in the middle and arc-shaped surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device 402 are fixedly connected to the central grain inlet pipe and the side wall of the support sleeve by bolts, serving as a fixed support.

[0069] See Figure 7-9 The internal feed pipe 303 includes an internal distribution pipe 305 and a distribution pipe fixer 306. The distribution pipe fixer 306 is a tubular structure. The internal distribution pipe 305 is preferably a flexible hose that extends from the perimeter of the internal feed pipe 303 at different angles.

[0070] In this invention, the volume of the transit grain warehouse is preferably 1 cubic meter to 3 cubic meters.

[0071] A top distribution pipe is installed below the side of the grain transfer silo. The number of top distribution pipes can range from 4 to 16. Each top distribution pipe has a valve at its inlet to control the direction of grain transport. The length of the top distribution pipe can range from 1 meter to 10 meters. The diameter of the top distribution pipe is 10 centimeters to 30 centimeters. A discharge nozzle, equipped with a valve, can be installed on the area where the top distribution pipe extends beyond the support sleeve. A vision sensor can be installed above the top distribution pipe to detect the grain level.

[0072] A central grain inlet pipe, extending vertically to the ground, is connected to the vertical discharge port at the bottom of the grain silo. The central grain inlet pipe can be made of pipe with a diameter of 20-45 cm. The lower part of the central grain inlet pipe is fixedly installed on the inner wall of the silo's bottom.

[0073] A metal support sleeve is vertically installed on the outside of the central grain inlet pipe. The lower part of the support sleeve is fixedly installed on the inner wall of the bottom of the silo. The upper part of the support sleeve is fixedly installed on the inner wall of the top of the silo. The diameter of the support sleeve can be selected from 80 cm to 150 cm. The support sleeve can be round, square, or irregularly shaped.

[0074] A transverse connecting device is installed between the central grain inlet pipe and the support sleeve. The transverse connecting device has a rod-shaped structure in the middle and arc-shaped surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device are fixedly connected to the side walls of the central grain inlet pipe and the support sleeve by bolts.

[0075] Each sleeve unit on the support sleeve has square channel holes on its side wall, arranged in a row along the axial direction. The channel holes are spaced at a fixed distance, with a width of 40-50 cm and a height of 60-120 cm. A removable sealing door is installed on each channel hole. These channel holes facilitate installation and maintenance.

[0076] The bottom of the grain transfer silo is equipped with a grain inlet valve at the connection between the discharge port and the central grain inlet pipe.

[0077] The ventilation duct is installed on the wall of the central grain inlet pipe, which is located below the grain inlet pipe valve. Preferably, a ventilation valve is also installed on the ventilation duct at the connection point with the central grain inlet pipe.

[0078] A shut-off valve with a shut-off function is installed every 2 to 5 meters above each of the aforementioned grain inlet pipes.

[0079] A feed pipe is installed every 2 to 5 meters along the wall of the central grain inlet pipe. Preferably, a discharge valve is installed on the feed pipe at the connection point with the central grain inlet pipe. The feed pipe can be 20 cm to 45 cm in diameter. The feed pipe is installed at an angle greater than 35 degrees to the ground.

[0080] The inner feed pipe is connected to the inner feed pipe around the perimeter of the inner feed pipe below the discharge valve, and extends out from the side wall of the support sleeve and is located inside the silo. The number of inner feed pipes can be one or multiple in different directions. The length of the inner feed pipe extending out of the support sleeve is 1 cm to 50 cm, and can vary.

[0081] Preferred valve types include gate valves, slide gate valves, butterfly valves, and ball valves. Valve control methods include electric and pneumatic operation. Valve operation can take the form of either a standard shut-off valve or a regulating valve.

[0082] The interior of the central grain inlet pipe can be equipped with a sensor to detect the height of the grain surface, preferably a tuning fork sensor or a vision sensor.

[0083] Example 1

[0084] See Figure 1 As shown, the technical solution of the present invention is specifically implemented in a shallow circular warehouse with a diameter of 25 meters and a height of 27 meters from the ground to the eaves.

[0085] Directly below the inlet of the shallow circular silo, a 3-cubic-meter transfer grain silo is installed. Top distribution pipes are installed on the side walls of the transfer grain silo; two vertically arranged top distribution pipes form a group, distributed circumferentially, for a total of four groups. Top distribution pipe valves are installed at the connection points between the top distribution pipes and the transfer grain silo. The lengths of the top distribution pipes are: four 4-meter pipes and four 6-meter pipes, with a diameter of 20 centimeters. Multiple nozzles and nozzle valves are installed in the area where the top distribution pipes extend beyond the support sleeve.

[0086] A central grain inlet pipe, vertically extending to the bottom of the grain silo, is installed at the bottom of the transfer grain silo. This central grain inlet pipe is made of 304 stainless steel, has a diameter of 35 cm, and a wall thickness of 5 mm. The lower part of the central grain inlet pipe is fixedly installed on the inner wall of the silo's bottom. A grain inlet valve is installed at the connection point between the vertical discharge port at the bottom of the transfer grain silo and the central grain inlet pipe.

[0087] The ventilation pipe is installed on the wall of the central grain inlet pipe, located below the grain inlet pipe valve. The ventilation pipe is made of stainless steel and has a diameter of 30 centimeters. A ventilation valve is installed between the ventilation pipe and the central grain inlet pipe.

[0088] A circular support sleeve made of 304 stainless steel is vertically installed on the outside of the central grain inlet pipe. The lower part of the support sleeve is fixedly installed on the inner wall of the bottom of the silo. The upper part of the support sleeve is fixedly installed on the inner wall of the top of the silo. The diameter of the support sleeve is 120 cm and the wall thickness is 5 mm. The support sleeve adopts a segmented structure, with each segment being 150 cm long, and every two support sleeve segments are connected by a flange.

[0089] Each sleeve unit on the support sleeve has square channel holes on its side wall, arranged in a row along the axial direction. Each channel hole is spaced 4.5 meters apart, 50 centimeters wide, and 100 centimeters high. A removable sealing door is installed on the top of each channel hole. The opening of these channel holes facilitates installation and maintenance.

[0090] A transverse connecting device is installed between the central grain inlet pipe and the support sleeve. The transverse connecting device has a rod-shaped structure in the middle and arc-shaped surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device are fixedly connected to the side walls of the central grain inlet pipe and the support sleeve by bolts.

[0091] The central grain inlet pipe has a shut-off valve installed above each of the aforementioned feed pipes in the silo, spaced 4 meters apart.

[0092] A silo feed pipe is installed every 4 meters along the wall of the central grain inlet pipe. A discharge valve is installed between the central grain inlet pipe and the silo feed pipe. The diameter of the silo feed pipe is 35 centimeters. The angle between the silo feed pipe and the ground is 40 degrees.

[0093] Three inner-bin distribution pipes are connected around the perimeter of the inner-bin feeding pipe below the discharge valve, extending from the side wall of the support sleeve and located inside the silo. Each inner-bin distribution pipe faces a different direction. The protruding portion of the inner-bin distribution pipe from the support sleeve is 10 centimeters in length.

[0094] Inside the central grain inlet pipe, there is a tuning fork sensor that can detect the height of the grain surface.

[0095] Example 2

[0096] See Figure 2 As shown, multiple nozzles are installed in the area where the top distribution pipe extends out of the support sleeve, but no nozzle valves are installed; instead, the top distribution pipe valve provides unified control. The remaining technical solutions are the same as in Embodiment 1 and will not be repeated here.

Claims

1. A dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device, comprising a grain transport pipe, a ventilation pipe, a silo, a transfer grain silo, a central grain inlet pipe, and a support sleeve; characterized in that, The support sleeve (4) is a sleeve structure, which stands vertically in the middle of the silo, and its upper and lower ends are connected and fixed to the silo. The central grain inlet pipe (3) is vertically installed inside the support sleeve. The top of the central grain inlet pipe (3) is connected to the bottom outlet of the transfer grain silo (2), and a grain inlet pipe valve (301) is installed at this position. The central grain inlet pipe extends downwards to near the bottom of the silo. The bottom closed end of the central grain inlet pipe is welded with a grain inlet pipe support (307) and fixed to the bottom of the silo. The central grain inlet pipe is connected to the ventilation pipe (5) on the pipe wall below the grain inlet pipe valve. On the central grain inlet pipe wall below the ventilation pipe (5), multiple silo feed pipes (303) are connected vertically and horizontally at intervals and connected to the pipe. The central grain inlet pipe (3) is connected internally, and a shut-off valve (302) is provided above each of the in-silo feeding pipes; the upper part of the ventilation pipe (5) extends from the top of the support sleeve (4) and the silo (6) to the outside of the silo and is provided with a ventilation valve (501); the in-silo feeding pipe (303) extends obliquely downward from the side wall of the support sleeve (4) and is located inside the silo, and a discharge valve (304) is provided on the in-silo feeding pipe; multiple in-silo distribution pipes (305) are connected around the pipe wall of the in-silo feeding pipe (303) and below the discharge valve, and extend from the side wall of the support sleeve and are located inside the silo.

2. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, The feed pipe (303) inside the silo is equipped with a distribution pipe fixer (306). The distribution pipe fixer (306) is a tubular structure with an annular flange at one end. The distribution pipe fixer is fitted inside the feed pipe and communicates with the feed pipe. The flange is fitted into the groove on the flange at one end of the feed pipe. At least four distribution pipes are installed around the pipe wall of the distribution pipe fixer and communicate with the inside of the pipe. They pass through the side wall of the feed pipe and the support sleeve and are located inside the silo. The flanges are bolted to the flange connecting plate of the central grain inlet pipe (3).

3. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, The transfer grain silo (2) is installed on the top of the silo and connected to the grain transport pipe outside the silo to transport grain. Multiple sets of suspended top distribution pipes (201) are installed around the side wall of the transfer grain silo (2) and are connected to the inner wall of the top of the silo (6) by steel wire ropes (203) to suspend and support the top distribution pipes. Each top distribution pipe (201) is equipped with a top distribution pipe valve (202) and multiple distribution pipe nozzles are distributed on the top distribution pipe.

4. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 3, characterized in that, A nozzle valve is installed on the fabric nozzle.

5. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, The support sleeve (4) is composed of multiple sleeve units connected together. Each sleeve unit has a flange at both ends of the pipe opening and is connected as a whole by the flange. The support sleeve has a square channel hole (401) for installing a sealing door on the side wall of each sleeve unit and is arranged in a row along the axial direction. The support sleeve (4) is sleeved on the outside of the transfer grain silo (2) and the central grain inlet pipe (3).

6. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, The end of the central grain inlet pipe is bent to one side to form the bottom inner feed pipe (308), which passes through the side wall of the support sleeve and is located inside the silo. Multiple inner feed pipes (305) are arranged around its pipe wall, which also pass through the side wall of the support sleeve and are located inside the silo. The bent part at the end of the central grain inlet pipe forms the bottom closed end.

7. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, An in-warehouse feeding pipe is installed on the wall of the central grain inlet pipe between the highest isolation valve and the grain inlet pipe valve.

8. The dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, A transverse connecting device (402) is provided between the central grain inlet pipe (3) and the supporting sleeve (4). The transverse connecting device (402) has a rod-shaped structure in the middle and arc surfaces at both ends, with through holes on the arc surfaces. Both ends of the transverse connecting device (402) are fixedly connected to the side wall of the central grain inlet pipe and the supporting sleeve by bolts.

9. The operating method of the dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 1, characterized in that, Includes the following steps: (1) Close all valves on the central grain inlet pipe and the in-silo feeding pipe, and transport the grain into the transfer grain warehouse through the grain conveying pipe at the top of the silo. (2) Open the inlet valve between the transfer grain warehouse and the central grain inlet pipe, so that the grain falls onto the first isolation valve in the central discharge pipe; then open the first isolation valve, and the grain slides onto the second isolation valve, then open the second isolation valve, and the grain slides onto the third isolation valve; and so on, until the grain falls onto the lowest isolation valve. (3) When the grain in the central grain inlet pipe is about half full, open the bottom layer partition valve and the grain falls into the bottom layer of the warehouse feeding pipe to start entering the warehouse. By controlling the valve, the amount of grain conveyed by the conveyor is kept basically consistent with the amount conveyed by the feeding pipe in the warehouse. (4) When the height of the grain entering the silo is close to the discharge port of the bottom layer of the silo, first open the valve of the second-to-last layer of the silo's feeding pipe, then close the bottom partition valve of the central grain inlet pipe, and the grain will begin to enter the silo. (5) When the height of the grain entering the silo is close to the discharge port of the feed pipe in the second-to-last layer of the silo, first open the valve of the feed pipe in the third-to-last layer of the silo, then close the isolation valve of the second-to-last layer of the central grain inlet pipe, and the grain will begin to enter the silo. (6) Follow the above operation method and continue in this way until the valve of the uppermost layer of the warehouse feed pipe is opened and the isolation valve of the uppermost layer of the central grain inlet pipe is closed. (7) When the height of the grain entering the silo is close to the discharge port of the top layer of the silo, open the valve of the top distribution pipe below the side of the transfer grain silo, and at the same time close the valve between the transfer grain silo and the central grain inlet pipe. The grain will start to enter the silo through the top distribution pipe. When the height of the grain in the silo reaches the specified entry height, the entry will end. (8) When the grain layer needs ventilation, first close the grain inlet valve, open the isolation valve, then open the inlet feed pipe valve of the grain layer that needs ventilation, open the valve on the ventilation pipe, turn on the ventilation equipment, and start ventilation. (9) After ventilation is completed, first turn off the ventilation equipment, then close the feed pipe valve in the silo, close the isolation valve, and then close the ventilation pipe valve.

10. The operating method of the dual-pipe valve-controlled silo anti-grading, anti-breakage, and directional ventilation device as described in claim 9, characterized in that, By controlling the opening and closing of the top feeding pipe valve, the grain inlet pipe valve, the isolation valve, and the discharge valve, the grain is kept in a restricted flow during its flow through the central grain inlet pipe, preventing free flow.

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