Construction process of suspended ceiling membrane structure for grain silos to improve airtightness

Abstract

This invention relates to a construction process for a suspended ceiling membrane structure for grain silos to improve airtightness, comprising the following steps: A. Installation; a1. Installing the top and bottom beams; a2. Installing the top membrane; a3. Installing the wall membrane; a4. Applying adhesive; B. Airtightness testing. The purpose of this invention is to solve or at least alleviate the problems of time-consuming and labor-intensive installation and removal of membranes during nitrogen-filled grain silos for pest control, and the poor cooling effect, by providing a construction process for a suspended ceiling membrane structure for grain silos to improve airtightness.

Description

Technical Field

[0001] This invention belongs to the field of grain storage technology, and in particular relates to a construction process for a grain silo ceiling membrane structure used to improve the airtightness of grain silos. Background Technology

[0002] Large quantities of grain are typically stored in grain silos. To prevent pests, the grain is filled with nitrogen to kill insects. Air conditioning is needed to prevent the grain from overheating and spoiling. However, the sealing of existing grain silo roofs is often compromised. Therefore, during nitrogen filling for pest control, a membrane must be laid on the surface of the grain pile before filling with nitrogen. After filling, the membrane must be removed to ensure ventilation and cooling. However, using air conditioning to cool the upper space of the grain silo is energy-intensive and ineffective.

[0003] For example, there are many corrugated steel tile grain silos in Jiangxi Province. Their insulation and airtightness are extremely poor. In particular, the roof is only covered by a single layer of polyurethane spraying, which directly causes the temperature in the silo to soar to over 50 degrees Celsius under the scorching sun in the hot summer. Air conditioning is used for cooling, but due to the huge space inside the silo, a large amount of electricity is consumed and the temperature is still difficult to stabilize. At the same time, due to the poor airtightness of the roof, it is difficult to achieve airtightness of the entire silo. When filling with nitrogen to kill insects, the silo must be covered with a membrane, and when ventilation and heat dissipation are needed, the membrane must be removed, which is labor-intensive and poses many safety hazards.

[0004] Grain-producing provinces often lack the funds to construct new grain storage facilities, leading to the construction of numerous simple, steel-roofed, corrugated metal-roofed flat-roofed warehouses. While these warehouses are low-cost and quick to build, and can be used for grain procurement within the same year, the vast space above the grain inside results in extremely poor airtightness and insulation. The single layer of polyurethane on the roof is insufficient to block the high temperatures under the summer sun, causing warehouse temperatures to soar above 50°C. Because these steel-roofed flat-roofed warehouses are among the five types of warehouses with inherently poor airtightness and insulation, even with air conditioning for temperature control in summer, the high energy consumption makes it difficult to maintain a stable temperature. Furthermore, the need to cover the warehouse during nitrogen-filling for pest control and remove the membrane for ventilation further exacerbates the problems, resulting in high labor intensity, poor working conditions, difficulties in grain storage, and safety hazards. With the vigorous promotion and application of green grain storage technologies in China today, improving the airtightness and insulation of these warehouses has become the primary issue that urgently needs to be addressed in the renovation of these steel-roofed, flat-roofed grain storage warehouses. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, solve or at least alleviate the problems of time-consuming and laborious laying and removal of diaphragms and poor cooling effect when using nitrogen filling for pest control in grain silos, and to provide a construction process for a grain silo ceiling membrane structure to improve the airtightness of grain silos.

[0006] This invention is achieved through the following technical solution:

[0007] A construction process for a suspended ceiling membrane structure for improving the airtightness of a grain silo, wherein the upper part of the grain silo is arched and the lower part is rectangular, and the side walls of the grain silo are provided with doors and windows. The suspended ceiling membrane structure includes a top membrane, wall membranes, top beams, bottom beams, window positioning frames, and door positioning frames, and includes the following steps:

[0008] A. Installation;

[0009] a1. Install the top beam and bottom beam, and install the top beam and bottom beam respectively to the upper part and bottom of the inner wall of the grain silo using rivets;

[0010] a2. Install the top membrane. Fix the edges of the top membrane into the positioning profiles. Use a hoist to lift the positioning profiles on all four sides of the top membrane. Pull the top membrane to the installation height. Connect the positioning profiles on all four sides of the top membrane to the top beam with bolts. Tighten the bolts to make the top membrane tensioned synchronously on all four sides. The top membrane is in a horizontal tension state.

[0011] a3. Install the wall film. The top edge of the wall film is fixedly and sealed to the section of the top film that is close to the positioning profile and far away from the top beam. The bottom edge of the wall film is fixedly and sealed to the bottom beam. The sides of two adjacent wall films are sealed and connected.

[0012] a4. Apply sealant: seal the gap between the bottom beam and the grain silo wall, and between the bottom beam and the bottom edge of the wall membrane.

[0013] B. Air tightness test;

[0014] Air was introduced into the space formed by the roof membrane, wall membrane, and grain silo floor to test the airtightness of the space.

[0015] To further realize the present invention, the following technical solutions may be preferred:

[0016] Preferably, a step a5 is provided between step a1 and step a2, wherein step a5 is to install the window positioning frame and the door positioning frame, and to install the window positioning frame and the door positioning frame on the inner wall of the grain silo wall respectively by means of rivets.

[0017] Preferably, step a3 further includes connecting the wall film to the window positioning frame and the door positioning frame for the pre-set openings of the window and door.

[0018] Preferably, step a4 further includes sealing the space between the window positioning frame and the door positioning frame and the wall of the grain silo with sealant, and sealing the space between the window positioning frame and the door positioning frame and the wall membrane with sealant.

[0019] Preferably, in step B, air is introduced into the space formed by the top membrane, wall membrane and grain silo floor until a set pressure is reached, then the introduction is stopped and timing begins. Timing stops when the pressure decreases to half. The timing time is the pressure half-life value. When the pressure half-life value is greater than the qualified value, the airtightness of the grain silo is qualified.

[0020] Preferably, the set pressure is 500 Pa and the pass value is 2 min.

[0021] The beneficial effects of the present invention through the above technical solution are:

[0022] This invention features a top membrane at the top of the grain silo and wall membranes on the walls, with the top and wall membranes sealed together to ensure overall airtightness. During nitrogen-filled pest control, there is no need to lay or remove the membranes; nitrogen can be directly filled into the grain silo, saving operation time and labor. Simultaneously, it reduces the silo's space and improves its airtightness without affecting storage capacity, thereby reducing energy consumption and enhancing cooling efficiency.

[0023] The space above the membrane can be opened to intelligently dissipate accumulated heat, ensuring that as little heat as possible is transferred from the top of the silo into the silo, which greatly reduces the space required for air conditioning and lowers air conditioning energy consumption. At the same time, it solves the biggest problem in implementing overall silo airtightness.

[0024] After the warehouse adopts the heat-reducing membrane ceiling, the air-conditioned space is reduced by more than 50%, and the air-conditioning energy consumption is reduced by at least 30%; the airtightness of the warehouse roof has been tested and the half-life can reach more than 145 minutes.

[0025] This invention is not only applicable to corrugated steel roof silos, but also to all silos requiring overall airtightness or thermal insulation. The market potential is huge, and the costs are controllable, installation is convenient, and the silos are aesthetically pleasing and durable. Furthermore, by achieving overall airtightness, many more efficient and intelligent new green grain storage technologies will emerge, such as "air conditioning internal circulation temperature control systems" and "circulating grain cold storage systems" suitable for the high-temperature regions of southern China. Detailed Implementation

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0028] A construction process for a suspended ceiling membrane structure for improving the airtightness of a grain silo, wherein the upper part of the grain silo is arched and the lower part is rectangular, and the side walls of the grain silo are provided with doors and windows. The suspended ceiling membrane structure includes a top membrane, wall membranes, top beams, bottom beams, window positioning frames, and door positioning frames, and includes the following steps:

[0029] A. Installation;

[0030] a1. Install the top beam and bottom beam, and install the top beam and bottom beam respectively to the upper part and bottom of the inner wall of the grain silo using rivets;

[0031] a2. Install the top membrane. Fix the edges of the top membrane into the positioning profiles. Use a hoist to lift the positioning profiles on all four sides of the top membrane. Pull the top membrane to the installation height. Connect the positioning profiles on all four sides of the top membrane to the top beam with bolts. Tighten the bolts to make the top membrane tensioned synchronously on all four sides. The top membrane is in a horizontal tension state.

[0032] a3. Install the wall film. The top edge of the wall film is fixedly and sealed to the section of the top film that is close to the positioning profile and far away from the top beam. The bottom edge of the wall film is fixedly and sealed to the bottom beam. The sides of two adjacent wall films are sealed and connected.

[0033] a4. Apply sealant: seal the gap between the bottom beam and the grain silo wall, and between the bottom beam and the bottom edge of the wall membrane.

[0034] B. Air tightness test;

[0035] Air was introduced into the space formed by the roof membrane, wall membrane, and grain silo floor to test the airtightness of the space.

[0036] A step a5 is provided between steps a1 and a2. Step a5 is to install the window positioning frame and the door positioning frame by rivets to install the window positioning frame and the door positioning frame on the inner wall of the grain warehouse, respectively.

[0037] Step a3 further includes connecting the wall film to the window positioning frame and the door positioning frame for the pre-set openings of the window and door.

[0038] Step a4 further includes sealing the gap between the window positioning frame and the door positioning frame and the wall of the grain silo with sealant, and sealing the gap between the window positioning frame and the door positioning frame and the wall membrane with sealant.

[0039] In step B, air is introduced into the space formed by the top membrane, wall membrane and grain silo floor until the set pressure is reached, then the introduction is stopped and timing begins. Timing stops when the pressure decreases to half. The timing time is the pressure half-life value. When the pressure half-life value is greater than the qualified value, the airtightness of the grain silo is qualified.

[0040] The set pressure is 500 Pa, and the acceptable value is 2 minutes.

[0041] This invention features a top membrane at the top of the grain silo and wall membranes on the walls, with the top and wall membranes sealed together to ensure overall airtightness. During nitrogen-filled pest control, there is no need to lay or remove the membranes; nitrogen can be directly filled into the grain silo, saving operation time and labor. Simultaneously, it reduces the silo's space and improves its airtightness without affecting storage capacity, thereby reducing energy consumption and enhancing cooling efficiency.

[0042] The structure of this invention is extremely lightweight, weighing less than 3 kg per square meter, minimizing its impact on the silo structure and ensuring the safety of the original grain silo structure. All components are custom-made in the factory, on-site installation takes about one week, and the components can be recycled and reused.

[0043] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction process for a suspended ceiling membrane structure for improving the airtightness of a grain silo, wherein the upper part of the grain silo is arched and the lower part is rectangular, and the side walls of the grain silo are provided with doors and windows, and the suspended ceiling membrane structure includes a top membrane, wall membranes, a top beam, a bottom beam, window positioning frames, and door positioning frames, characterized in that, Includes the following steps: A. Installation; a1. Install the top beam and bottom beam, and install the top beam and bottom beam to the upper and lower parts of the inner wall of the grain silo using rivets; install the window positioning frame and door positioning frame, and install the window positioning frame and door positioning frame to the window and door parts of the inner wall of the grain silo using rivets. a2. Install the top membrane. Fix the edges of the top membrane into the positioning profiles. Use a hoist to lift the positioning profiles on all four sides of the top membrane. Pull the top membrane to the installation height. Connect the positioning profiles on all four sides of the top membrane to the top beam with bolts. Tighten the bolts to make the top membrane tensioned synchronously on all four sides. The top membrane is in a horizontal tension state. a3. Install the wall film. The top edge of the wall film is fixedly and sealed to the section of the top film that is close to the positioning profile and far away from the top beam. The bottom edge of the wall film is fixedly and sealed to the bottom beam. The sides of two adjacent wall films are sealed and connected. The wall film is connected to the window positioning frame and the door positioning frame for the corresponding window and door openings. a4. Apply sealant: seal the gap between the bottom beam and the wall of the grain silo, and between the bottom beam and the bottom edge of the wall membrane. Sealant is also applied between the window positioning frame and the door positioning frame and the wall of the grain silo, and between the window positioning frame and the door positioning frame and the wall membrane. B. Air tightness test; Air is introduced into the space formed by the top membrane, wall membrane, and grain silo floor until the set pressure is reached, then the introduction is stopped and timing begins. Timing stops when the pressure decreases to half. The timing time is the pressure half-life value. If the pressure half-life value is greater than the qualified value, the airtightness of the grain silo is qualified.

2. The construction process of a grain silo ceiling membrane structure for improving the airtightness of grain silos according to claim 1, characterized in that, The set pressure is 500 Pa, and the acceptable value is 2 minutes.