Large shallow circular chamber functional lung-type pressure self-regulation system

Abstract

This invention proposes a large-scale, shallow, circular silo-type self-regulating pressure system, comprising a silo body. Its key feature is the inclusion of an elastic device that can contract or expand under pressure. This elastic device is located at the top of the silo body and is connected to an air inlet pipe. The end of the air inlet pipe extends out of the silo body and is connected to an exhaust pipe and an intake pipe, respectively. The exhaust pipe is equipped with a one-way exhaust valve, and the intake pipe is equipped with a one-way intake valve. The end of the intake pipe is connected to a high-pressure gas source, providing gas at a temperature of 15 to 25°C. This invention effectively balances the pressure inside and outside the silo while also considering temperature-controlled grain storage processes, preventing overheating inside the silo while balancing the pressure difference. Furthermore, it is easy to install and can be retracted when not in use to reduce space occupancy within the silo.

Description

Technical Field

[0001] This invention relates to the field of grain storage technology, and in particular to a functional lung-type pressure self-regulating system for large shallow circular silos used to balance and regulate the pressure inside the silo. Background Technology

[0002] The airtightness of a warehouse is directly related to the implementation of controlled atmosphere storage technology, phosphine fumigation for pest control, and temperature-controlled storage technology in shallow round silos. However, the airtightness of a warehouse has two sides. On the one hand, poor airtightness leads to greater heat and moisture exchange between the warehouse and the external environment, affecting the local temperature and moisture content of the grain pile. If not addressed in time, this can cause the grain pile to heat up and become moldy. On the other hand, good airtightness of a warehouse can increase the influence of external temperature on the internal pressure of a highly sealed warehouse. Changes in internal pressure can intensify the exchange of gases and temperatures between the inside and outside of the warehouse, which is not conducive to the airtight storage of grain. For shallow round silos with a half-life between 600 and 900 seconds, the internal pressure fluctuates by ±70 Pa due to the influence of external temperature, as reported in the academic paper "Ye Haijun, Li Songwei, Wang Xiaobo, et al. Study on temperature and pressure changes in statically sealed shallow round silos [J]. Grain Processing, 2020, 45(01):65-67." Therefore, it is necessary to regulate the pressure inside the silo to balance the pressure inside and outside, thereby avoiding gas and temperature exchange caused by large pressure differences between the inside and outside of the silo. This is especially true for large, shallow circular silos, which have large capacity and good airtightness, and the pressure difference caused by temperature differences between the inside and outside of the silo can be very large, making technical improvements essential. Summary of the Invention

[0003] The purpose of this invention is to propose a large-scale shallow circular silo functional lung-type pressure self-regulating system, which can effectively balance the pressure inside and outside the silo, while also taking into account the temperature control grain storage process. It avoids causing the temperature inside the silo to rise while balancing the pressure difference inside and outside the silo. In addition, it is easy to install and can be retracted when not in use to reduce the space occupied inside the silo.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A large, shallow, circular, functional lung-type pressure self-regulating system includes a chamber body. Its distinguishing feature is that it further includes an elastic device that can contract or expand under pressure. The elastic device is located at the top of the chamber body and is connected to an air inlet pipe. The end of the air inlet pipe extends out of the chamber body and is connected to an exhaust pipe and an intake pipe, respectively. The exhaust pipe is equipped with a one-way exhaust valve, and the intake pipe is equipped with a one-way intake valve. The end of the intake pipe is connected to a high-pressure gas source, and the high-pressure gas source provides gas with a temperature of 15 to 25°C.

[0006] In the optimized solution, the high-pressure air source is a fan, the air outlet of the fan is connected to the end of the air inlet pipe, the air inlet of the fan is connected to a temperature-controlled air pipe, the temperature-controlled air pipe is set in a temperature-controlled environment, and a temperature-controlled water bath or air conditioner is set in the temperature-controlled environment to control the temperature of the temperature-controlled environment at 15 to 25°C.

[0007] In the optimized design, the air inlet of the fan is also connected to a normal temperature air pipe, the normal temperature air pipe is equipped with a first air valve, the end of the normal temperature air pipe is connected to the external environment of the chamber, and the temperature control air pipe is equipped with a second air valve.

[0008] The elastic device can be an airbag structure made of polyvinyl chloride film, or it can have the following structure: The elastic device includes a high-pressure resistant corrugated pipe and a pipe frame. One end of the high-pressure resistant corrugated pipe is a connecting end, and the other end is closed. Multiple hanging parts are evenly connected to the outer side of the pipe wall of the high-pressure resistant corrugated pipe. The pipe frame has a long guide rod and multiple connectors on the long guide rod. The bottom of the connector is connected to the top of the hanging part, so that the high-pressure resistant corrugated pipe is suspended on the long guide rod. Among them, the connectors connected near the connecting end of the high-pressure resistant corrugated pipe are fixed heads, which are fixedly connected to the long guide rod. The other connectors are movable heads, which are movably connected to the long guide rod, so that the closed end of the high-pressure resistant corrugated pipe can be moved away from or close to the connecting end of the high-pressure resistant corrugated pipe, so that the high-pressure resistant corrugated pipe can be arranged telescopically along the long guide rod. The connecting end of the high-pressure resistant corrugated pipe is connected to an air pipe.

[0009] In the optimized design, the long guide rod of the pipe rack is an arc-shaped rod structure.

[0010] In the optimized design, the long guide rod of the pipe rack has a guide groove arranged along its length direction, the top of the movable head is movably connected to the guide groove and can move along the guide groove; the top of the fixed head is fixedly connected to the guide groove.

[0011] In the optimized design, the pipe rack also has multiple side rods evenly connected to the long guide rod, and the ends of the side rods are fixedly connected to the wall of the silo, thereby achieving a fixed connection between the pipe rack and the wall of the silo.

[0012] This invention has the following outstanding substantive features and significant progress:

[0013] 1. The large shallow circular silo functional lung-type pressure self-regulating system of the present invention takes into account the temperature control grain storage technology, so that the temperature of the gas injected into the elastic device is between 15 and 25°C, thereby preventing the high temperature from being transferred to the silo environment through the elastic device, and avoiding the temperature rise inside the silo while balancing the pressure difference between the inside and outside of the silo.

[0014] 2. This invention achieves real-time air intake and exhaust of the elastic device by opening and closing a one-way exhaust valve and a one-way intake valve, efficiently balancing the pressure difference inside and outside the chamber. Furthermore, it injects air into the elastic device through a high-pressure air source to improve the air intake efficiency of the elastic device, thereby quickly balancing the internal and external air pressure.

[0015] 3. The elastic device of the present invention uses a high-pressure resistant bellows, which can contract or expand under a small pressure difference between the inside and outside of the tube, and has a large range of volume change. It can be compressed to a very small volume and expanded to a very large volume, which can efficiently balance the pressure inside and outside the chamber, thereby avoiding excessive pressure difference between the inside and outside of the chamber.

[0016] 4. The large shallow circular silo functional lung-type pressure self-regulating system of the present invention is easy to install, can be adapted to the arc-shaped silo wall of the large shallow circular silo, and can be retracted when not in use without disassembly, so as to reduce the space occupied inside the silo and reduce the workload. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the elastic device in the large shallow circular chamber functional lung-type pressure autonomous regulation system of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation state of the large shallow circular chamber functional lung-type pressure self-regulating system of the present invention.

[0019] Figure 3 This is a schematic diagram of the expansion state of the large shallow circular chamber functional lung-type pressure self-regulating system of the present invention.

[0020] Figure 4 This is a schematic diagram of the contraction state of the large shallow circular chamber functional lung-type pressure self-regulating system of the present invention. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Example

[0023] refer to Figures 1 to 4 A large, shallow, circular chamber-type self-regulating pressure system includes a chamber body 9 and an elastic device that can contract or expand under pressure.

[0024] The elastic device is located at the top inside the chamber 9. The elastic device is connected to the air inlet pipe 3. The end of the air inlet pipe 3 extends out of the chamber 9 and is connected to the exhaust pipe 31 and the air inlet pipe 32 respectively. The exhaust pipe 31 is equipped with a one-way exhaust valve 311, and the air inlet pipe 32 is equipped with a one-way air inlet valve 321. The end of the air inlet pipe 32 is connected to a high-pressure gas source. The gas temperature provided by the high-pressure gas source is 15 to 25°C.

[0025] The specific structure of the elastic device in this embodiment is as follows: the elastic device includes a high-pressure resistant corrugated pipe 1 and a pipe frame 2. One end of the high-pressure resistant corrugated pipe 1 is a connecting end 11, and the other end is closed as a closed end 12. Multiple hanging parts 10 are evenly connected to the outer side of the pipe wall of the high-pressure resistant corrugated pipe 1. The pipe frame 2 has a long guide rod 21 and multiple connectors provided on the long guide rod 21. The bottom of the connectors is connected to the top of the hanging parts 10 one by one, so that the high-pressure resistant corrugated pipe 1 is suspended on the long guide rod 21. The connector near the connecting end 11 of the high-pressure resistant corrugated pipe 1 is a fixed head 22, which is fixedly connected to the long guide rod 21. The other connectors are movable heads 23, which are movably connected to the long guide rod 21. This allows the closed end 12 of the high-pressure resistant corrugated pipe 1 to be moved away from or close to the connecting end 11 of the high-pressure resistant corrugated pipe 1, so that the high-pressure resistant corrugated pipe 1 can be arranged telescopically along the long guide rod 21. The connecting end 11 of the high-pressure resistant corrugated pipe 1 is connected to the gas inlet pipe 3.

[0026] In the above structure, gas can be injected into the high-pressure resistant bellows 1 through the air inlet pipe 32, thereby causing the high-pressure resistant bellows 1 to stretch and expand in volume, such as... Figure 3 The state shown can also be such that the high-pressure resistant bellows 1 discharges gas through the exhaust pipe 31, thereby causing the high-pressure resistant bellows 1 to contract and reduce its volume, as shown. Figure 4 The state shown. In addition, the one-way intake valve 321 and the one-way exhaust valve 311 can be automatic valve structures with a set opening and closing pressure difference threshold, or they can be electrically controlled valve structures.

[0027] To adapt to use in large, shallow circular silos, in this embodiment, the long guide rod 21 of the tube frame 2 adopts an arc-shaped rod structure.

[0028] Furthermore, the long guide rod 21 of the tube frame 2 has a guide groove 20 arranged along its length direction. The top of the movable head 23 is movably connected to the guide groove 20 and can move along the guide groove 20; the top of the fixed head 22 is fixedly connected to the guide groove 20. The movable connection between the guide groove 20 and the movable head 23 can be referenced to the connection between a curtain track and a hook installed on the curtain track, thereby realizing the movable installation of the movable head 23 and the long guide rod 21.

[0029] Alternatively, an installation structure can be adopted in which the movable head 23 is directly movably fitted onto the long guide rod 21 via a hook or ring (not shown in the figure). This structure is simpler, but during installation, in order to ensure the range of movement of the movable head 23, both ends of the long guide rod 21 can only be fixedly connected to the warehouse, which has the disadvantage of having fewer connection points. It is more suitable for relatively short long guide rods 21.

[0030] Furthermore, the pipe rack 2 has multiple side rods 24 evenly connected to the long guide rod 21. The ends of the side rods 24 are fixedly connected to the wall of the chamber 9, thus achieving a fixed connection between the pipe rack 2 and the wall of the chamber 9. The long guide rod 21 of the pipe rack 2 is horizontally arranged so that the high-pressure resistant corrugated pipe 1 can be telescopically suspended from the top inside the chamber 9. The end of the air inlet pipe 3 passes through the wall or top of the chamber 9 and connects to the exhaust pipe 31 and the air inlet pipe 32 outside the chamber 9.

[0031] In this embodiment, the high-pressure air source is a fan 4. The outlet of the fan 4 is connected to the end of the inlet pipe 32. The inlet of the fan 4 is connected to a temperature-controlled air pipe 41 and a normal-temperature air pipe 43. The temperature-controlled air pipe 41 is installed in a temperature-controlled environment 42, which is equipped with a temperature-controlled water bath or air conditioner. The temperature of the temperature-controlled environment 42 is controlled between 15 and 25°C by the water bath or air conditioner. The normal-temperature air pipe 43 is equipped with a first air valve 431, and the end of the normal-temperature air pipe 43 is connected to the external environment. The temperature-controlled air pipe 41 is equipped with a second air valve 411.

[0032] In the above structure, when the ambient temperature outside the warehouse is below or equal to 20℃, the low-temperature air from the outside environment can be used directly. Therefore, by opening the first air valve 431 and connecting the fan 4 to the normal temperature air pipe 43, air from the outside environment can be injected into the high-pressure corrugated pipe 1. When the ambient temperature outside the warehouse is above 20℃, the air temperature outside the warehouse is too high, and directly injecting it into the high-pressure corrugated pipe 1 will cause the temperature inside the warehouse to rise, which is not conducive to low-temperature grain storage. Therefore, it is necessary to open the second air valve 411 and connect the fan 4 to the temperature control air pipe 41. After the temperature is cooled to 15-25℃ by the temperature control environment 42, the air is then injected into the high-pressure corrugated pipe 1.

[0033] Taking controlled atmosphere storage as an example, a pressure detector is pre-installed inside the storage silo to monitor the internal pressure P1, and a nitrogen concentration detector or oxygen concentration detector is pre-installed to monitor the nitrogen concentration. Nitrogen is added to the silo until the nitrogen concentration reaches 98% or higher, then the nitrogen filling is stopped. When the nitrogen concentration drops to 98.0%, gas is replenished. To maintain optimal storage conditions, the autonomous adjustment system of this embodiment is used to keep the internal pressure P1 as close as possible to the external pressure P0. In this embodiment, the pressure difference between the inside and outside of the silo can fluctuate within ±50 Pa, i.e., P1 = P0 ± 50 Pa.

[0034] In this embodiment, the autonomous adjustment system simultaneously fills the grain silo with nitrogen and injects a suitable amount of gas into the high-pressure resistant bellows 1 via the blower 4, causing the bellows 1 to be in a partially expanded state. Figure 2As shown, the injected gas is usually air. During controlled atmosphere operation, the one-way inlet valve 321 and the one-way outlet valve 311 open the one-way flow channel according to the pressure difference change, so that the high-pressure resistant bellows 1 contracts or expands due to the pressure difference change inside and outside the chamber, thereby maintaining the pressure inside the chamber P1=P0±50Pa.

[0035] When the temperature inside the chamber rises, the gas temperature increases and the gas pressure P1 increases. When P1 > P0 + 50 Pa, the one-way exhaust valve 311 opens, and the gas is discharged through the exhaust pipe 31. The gas then contracts through the high-pressure resistant bellows 1, reducing its volume and thus lowering the internal gas pressure. When the internal gas pressure drops to P1 = P0 + 50 Pa, the one-way exhaust valve 311 closes, maintaining a normal controlled atmosphere environment inside the chamber.

[0036] When the temperature inside the storage chamber decreases, the gas temperature drops, and the gas pressure P1 decreases. When P1 < P0 - 50 Pa, the one-way inlet valve 321 opens, and simultaneously, the fan 4 starts, injecting gas into the high-pressure resistant bellows 1 through the inlet pipe 32 via the one-way inlet valve 321. This causes the high-pressure resistant bellows 1 to expand and increase in volume, achieving the effect of pressurizing the storage chamber. Simultaneously, combined with temperature-controlled grain storage technology, the temperature of the gas injected into the high-pressure resistant bellows 1 is maintained between 15 and 25°C, thus preventing high temperatures from being transferred to the storage environment through the high-pressure resistant bellows 1. When the gas pressure inside the storage chamber rises to P1 = P0 - 50 Pa, the fan 4 and the one-way inlet valve 321 are shut off, maintaining a normal controlled atmosphere environment inside the storage chamber.

Claims

1. A large-scale shallow circular chamber-type functional lung-type pressure self-regulating system, comprising a chamber body (9), characterized in that: It also includes an elastic device that can contract or expand under pressure. The elastic device is located at the top of the chamber (9). The elastic device is connected to an air inlet pipe (3). The end of the air inlet pipe (3) extends out of the chamber (9) and is connected to an exhaust pipe (31) and an air inlet pipe (32) respectively. The exhaust pipe (31) is equipped with a one-way exhaust valve (311), and the air inlet pipe (32) is equipped with a one-way air inlet valve (321). The end of the air inlet pipe (32) is connected to a high-pressure gas source. The gas temperature provided by the high-pressure gas source is 15 to 25°C. The high-pressure air source is a fan (4). The air outlet of the fan (4) is connected to the end of the air inlet pipe (32). The air inlet of the fan (4) is connected to a temperature-controlled air pipe (41). The temperature-controlled air pipe (41) is set in a temperature-controlled environment (42). A temperature-controlled water bath or air conditioner is set in the temperature-controlled environment (42). The temperature of the temperature-controlled environment (42) is controlled at 15 to 25°C by the water bath or air conditioner. The air inlet of the fan (4) is also connected to a normal temperature air pipe (43), a first air valve (431) is provided on the normal temperature air pipe (43), the end of the normal temperature air pipe (43) is connected to the external environment of the chamber, and a second air valve (411) is provided on the temperature control air pipe (41). The elastic device includes a high-pressure resistant corrugated pipe (1) and a pipe rack (2). One end of the high-pressure resistant corrugated pipe (1) is a connecting end (11), and the other end is closed as a closed end (12). Multiple hanging parts (10) are evenly connected to the outer side of the wall of the high-pressure resistant corrugated pipe (1). The pipe rack (2) has a long guide rod (21) and multiple connectors on the long guide rod (21). The bottom of the connectors is connected to the top of the hanging parts (10) one by one, so that the high-pressure resistant corrugated pipe (1) is suspended on the long guide rod (21). The connector near the connecting end (11) of the pipe (1) is a fixed head (22), which is fixedly connected to the long guide rod (21). The other connectors are movable heads (23), which are movably connected to the long guide rod (21). This allows the closed end (12) of the high-pressure corrugated pipe (1) to be away from or close to the connecting end (11) of the high-pressure corrugated pipe (1), so that the high-pressure corrugated pipe (1) can be arranged in a telescopic manner along the long guide rod (21). The connecting end (11) of the high-pressure corrugated pipe (1) is connected to the gas inlet pipe (3).

2. The large-scale shallow circular chamber functional lung-type pressure self-regulating system according to claim 1, characterized in that: The long guide rod (21) of the tube frame (2) is an arc-shaped rod structure.

3. The large-scale shallow circular chamber functional lung-type pressure self-regulating system according to claim 1, characterized in that: The long guide rod (21) of the tube rack (2) has a guide groove (20) arranged along its length direction. The top of the movable head (23) is movably connected to the guide groove (20) and can move along the guide groove (20); the top of the fixed head (22) is fixedly connected to the guide groove (20).

4. The large shallow circular chamber functional lung-type pressure self-regulating system according to claim 3, characterized in that: The pipe rack (2) also has multiple side rods (24) evenly connected to the long guide rod (21). The ends of the side rods (24) are fixedly connected to the wall of the silo (9) to realize the fixed connection between the pipe rack (2) and the wall of the silo (9).

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