An autoclave for aerated concrete panels

Abstract

This utility model relates to the technical field of building material production equipment, and in particular to an autoclave for aerated concrete panels. The autoclave includes a body with a hinged door at its front end. A movable platform is installed on the bottom surface inside the body, capable of horizontally moving out and inward into the autoclave. A pull rod is provided at the front end of the movable platform. By incorporating steam outlet pipes evenly distributed along the length of the autoclave and opening multiple outlets on them, steam can be evenly released to all areas inside the autoclave, effectively avoiding localized temperature differences caused by uneven steam distribution. This improves the uniformity of the autoclaving process and the consistency of product performance. Furthermore, by installing an electric heating tube at the top of the autoclave, continuous heating of the steam and air inside the autoclave can be maintained after the steam supply stops, helping to maintain a high-temperature, high-pressure environment, preventing pressure drops due to heat loss, and ensuring a stable and controllable autoclaving process.

Description

Technical Field

[0001] This utility model relates to the field of building material production equipment technology, and in particular to an autoclave for aerated concrete panels. Background Technology

[0002] Autoclaved aerated concrete (AAC) panels, as a lightweight, high-strength, and thermally insulating new type of building material, are widely used in industrial and civil building structures. To improve their physical and mechanical properties and durability, AAC panels need to undergo high-temperature and high-pressure autoclaving after molding to enhance the strength and stability of the products. The autoclave, as a key piece of equipment for autoclaving in the production process of AAC, creates a high-temperature and high-pressure environment by introducing saturated steam into its sealed internal space to accelerate the hardening and structural formation of the AAC blank. Its performance directly affects the quality of the final product.

[0003] Patent CN221436748U discloses an autoclave for autoclaved aerated concrete (AAC) panels. The device includes a vessel body, an air inlet at the top of the vessel body, and an air inlet pipe connected to it for supplying steam into the vessel body. A pushing mechanism is provided inside the vessel body for supporting and positioning the AAC panels. An air outlet is located on one side of the vessel body, equipped with an air outlet mechanism. A filter screen is installed inside the air outlet pipe to filter and collect metal particles in the discharged gas, preventing impurities from flowing back or polluting the environment, and facilitating regular cleaning and maintenance. Although the patent makes certain improvements in structural design, in practical applications… There are still some shortcomings. First, the steam enters the vessel through a single inlet pipe without a uniformly distributed steam distribution structure, making it difficult for the steam to diffuse evenly throughout the vessel cavity. This can easily lead to uneven distribution of temperature and pressure fields. Second, due to the uneven steam distribution, local areas may experience low temperatures or insufficient steam flow, which can affect the overall autoclaving effect of the aerated concrete slabs, resulting in insufficient autoclaving in some areas and unstable product quality. In addition, the device does not have an auxiliary heating device, making it impossible to maintain the required constant temperature and pressure environment inside the vessel after the steam supply stops, which is not conducive to ensuring the continuity and stability of the autoclaving process.

[0004] Therefore, there is an urgent need to provide an autoclave for aerated concrete panels that can achieve uniform steam distribution and higher thermal efficiency. Utility Model Content

[0005] To overcome the shortcomings of existing autoclaves, such as uneven steam distribution leading to localized low temperatures or insufficient steam flow, which affects the overall autoclaving effect of aerated concrete panels, and the lack of auxiliary heating devices that cannot maintain the required constant temperature and pressure environment inside the autoclave after steam supply stops, thus affecting the continuity and stability of the autoclaving process, this utility model provides an autoclave for aerated concrete panels that can achieve uniform steam distribution and higher thermal efficiency.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: an autoclave for aerated concrete panels, comprising a vessel body, a vessel door hinged to the front end of the vessel body, a movable platform mounted on the bottom surface inside the vessel body, the movable platform being able to move horizontally forward and backward and be pushed into the vessel body, a pull rod mounted at the front end of the movable platform, multiple electric heating tubes evenly spaced along the length of the top surface inside the vessel body, a steam supply pipe inside the vessel body, one end of the steam supply pipe extending from the top of the vessel body and connected to an external steam source, and the other end connected to a steam outlet pipe via a threaded connector, the steam outlet pipe being arranged along the length of the vessel body and having multiple evenly spaced outlets thereon, a handwheel mounted on the steam outlet pipe, and a steam discharge valve mounted on the top of the vessel body.

[0007] Furthermore, a sealing strip is provided on the contact surface between the vessel body and the vessel door.

[0008] Furthermore, the electric heating element has an arc-shaped structure design.

[0009] Furthermore, the left and right sides of the mobile platform are respectively hinged to a first limiting plate, and the front and rear sides are also respectively hinged to a second limiting plate. Threaded holes are provided on the front and rear sides of the first limiting plate and the left and right sides of the second limiting plate. The first limiting plate and the second limiting plate are connected and fixed by screwing a threaded rod into the threaded holes.

[0010] Furthermore, the bottom of the vessel body is provided with multiple water receiving frames. The water receiving frame located in the middle is connected to the water receiving frames on the left and right sides through a guide pipe, forming a condensate collection structure. The water receiving frames on the left and right sides are each connected to a drain pipe, and a ball valve for controlling drainage is installed on the drain pipe.

[0011] Furthermore, a filter screen is embedded in the outlet end of the steam discharge valve body.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. By setting a steam outlet pipe evenly arranged along the length direction in the autoclave body and opening multiple outlets on it, the steam can be evenly released to all areas inside the autoclave body, effectively avoiding the problem of local temperature differences caused by uneven steam distribution, thereby improving the uniformity of autoclaving treatment of aerated concrete panels and the consistency of product performance. In addition, by setting an electric heating tube at the top of the autoclave body, the steam and air inside the autoclave can be continuously heated after the steam supply stops, which helps to maintain a high temperature and high pressure environment, prevent pressure drop caused by heat loss, and ensure that the autoclaving process is stable and controllable.

[0013] 2. The first and second limiting plates are hinged on the mobile platform and connected and fixed between the limiting plates by threaded rods. This allows for flexible deployment when placing aerated concrete panels and for limiting and fixing them around their perimeter during autoclaving to prevent displacement or deformation, thereby improving loading and unloading efficiency and ease of operation.

[0014] 3. Multiple water collection frames are installed at the bottom of the autoclave to collect condensate generated during the autoclaving process. The middle water collection frame is connected to the water collection frames on both sides through a guide pipe, and finally discharged through a drain pipe. This structure effectively avoids the impact of condensate accumulation on the aerated concrete slab, while improving the safety and stability of the equipment operation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional sectional view of the vessel body, vessel door, and sealing strip of this utility model.

[0017] Figure 3 This is a three-dimensional sectional view of the vessel body, moving platform, and tie rod of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the threaded connector, steam outlet pipe, and handwheel components of this utility model.

[0019] Figure 5 This is a three-dimensional sectional view of the mobile platform, hinge, and first limiting plate of this utility model.

[0020] Figure 6 This is a partial sectional view of the second limiting plate and threaded rod of this utility model.

[0021] Figure 7 This is a partial sectional view of the water receiving frame, flow guide pipe, and ball valve components of this utility model.

[0022] Reference numerals: 1: vessel body, 2: vessel door, 3: sealing strip, 4: moving platform, 5: pull rod, 6: electric heating tube, 7: steam supply pipe, 8: steam discharge valve, 9: threaded connector, 10: steam outlet pipe, 11: handwheel, 12: hinge, 13: first limit plate, 14: second limit plate, 15: threaded screw rod, 16: water receiving frame, 17: guide pipe, 18: drain pipe, 19: ball valve, 20: filter screen. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figures 1-4 An autoclave for aerated concrete panels includes a vessel body 1. A door 2 is hinged to the front end of the vessel body 1. A sealing strip 3 is provided on the contact surface between the vessel body 1 and the door 2 to ensure good sealing performance when the door 2 is closed. A movable platform 4 is installed on the bottom surface inside the vessel body 1. The movable platform 4 can be moved horizontally forward and backward and pushed into the vessel body 1. A pull rod 5 is provided at the front end of the movable platform 4 for pulling out or pushing the platform in. Six electric heating tubes 6 are evenly spaced along the length of the top surface inside the vessel body 1. The electric heating tubes 6 have an arc-shaped structure design. This arc-shaped design helps to expand the heating coverage area, allowing heat to be radiated more evenly to all parts of the inner cavity of the vessel body 1, thereby improving the uniformity of the overall temperature field. The interior of the vessel body 1 is equipped with... A steam supply pipe 7 is provided, one end of which extends from the top of the vessel body 1 and is connected to an external steam source, and the other end is connected to a steam outlet pipe 10 via a threaded connector 9. The steam outlet pipe 10 is arranged along the length of the vessel body 1 and has six evenly spaced outlets to release steam evenly into the vessel body 1. A handwheel 11 is provided on the steam outlet pipe 10 to provide a gripping point for disassembling and installing the steam outlet pipe 10. A steam discharge valve 8 is installed on the top of the vessel body 1 to discharge steam after steaming and pressurization. A filter screen 20 is embedded in the outlet end of the valve body of the steam discharge valve 8 to intercept and filter particulate impurities carried in the discharged steam, preventing impurities from polluting the environment or clogging the exhaust pipe.

[0025] When using the autoclave for aerated concrete slabs, open the autoclave door 2, place the concrete slab to be autoclaved on the moving platform 4, then close the autoclave door 2 and ensure a good seal. Connect the steam supply pipe 7 to an external steam source. Steam enters the steam outlet pipe 10 through the steam supply pipe 7 and is evenly distributed into the autoclave body 1 through multiple outlets, causing the temperature and pressure inside the autoclave to rise rapidly. When the temperature and pressure reach the set values, stop supplying steam and maintain the high temperature and high pressure state by relying on the sealed environment of the autoclave body 1. At the same time, turn on the electric heating tube 6 for auxiliary heating to prevent heat loss and thus stably maintain the required process conditions. After autoclaving is completed, open the steam discharge valve 8 to release the steam inside the autoclave. After the temperature and pressure inside the autoclave drop to a safe range, open the autoclave door 2 and pull out the moving platform 4 and the concrete slab on it using the pull rod 5 to complete the entire autoclaving process.

[0026] Example 2: Based on Example 1, please refer to... Figure 5 and Figure 6 The left and right sides of the mobile platform 4 are respectively hinged to the first limiting plate 13 by the hinge 12, and the front and rear sides are also respectively hinged to the second limiting plate 14 by the hinge 12. The first limiting plate 13 and the second limiting plate 14 are provided with threaded holes on the front and rear sides and the left and right sides of the second limiting plate 14. The first limiting plate 13 and the second limiting plate 14 are connected and fixed by screwing the threaded rod 15 into the threaded holes.

[0027] When placing a concrete slab, first unscrew the threaded rod 15 to release the fixation between the first limiting plate 13 and the second limiting plate 14. Then, flip the first limiting plate 13 and the second limiting plate 14 downwards to make them flat. After placing the concrete slab to be autoclaved smoothly on the moving platform 4, flip the first limiting plate 13 and the second limiting plate 14 upwards to a vertical position. Tighten the threaded rod 15 to make the first limiting plate 13 and the second limiting plate 14 firmly connected, thereby limiting and fixing the concrete slab around its perimeter to prevent it from shifting or deforming during the autoclaving process.

[0028] Please see Figure 7 The bottom of the vessel body 1 is provided with three water collection frames 16 for collecting condensate generated during the steam pressure process. The water collection frame 16 in the middle is connected to the water collection frames 16 on the left and right sides respectively through two guide pipes 17, forming a condensate collection structure. The water collection frames 16 on the left and right sides are each connected to a drain pipe 18, and a ball valve 19 for controlling drainage is installed on the drain pipe 18.

[0029] During the autoclaving process, a large amount of condensate is generated due to the temperature difference between the steam and the inner wall of the autoclave 1. This condensate flows down the inner wall of the autoclave 1 and is collected by the water collection frame 16. The condensate is collected through the guide pipe 17 between the middle water collection frame 16 and the water collection frames on both sides, and finally discharged through the drain pipe 18 on both sides. When drainage is required, simply open the ball valve 19 on the drain pipe 18 to discharge the condensate smoothly, thereby maintaining the stability of the environment inside the autoclave and avoiding adverse effects of condensate on the aerated concrete slab.

[0030] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. An autoclave for aerated concrete panels, comprising an autoclave body (1), wherein an autoclave door (2) is hinged to the front end of the autoclave body (1), and a movable platform (4) is installed on the bottom surface inside the autoclave body (1), wherein the movable platform (4) can be moved horizontally back and forth and pushed into the autoclave body (1), and a pull rod (5) is provided at the front end of the movable platform (4), characterized in that: Multiple electric heating tubes (6) are evenly spaced along the length of the inner top surface of the vessel body (1). A steam supply pipe (7) is provided inside the vessel body (1). One end of the steam supply pipe (7) passes through the top of the vessel body (1) and is connected to an external steam source. The other end is connected to a steam outlet pipe (10) through a threaded connector (9). The steam outlet pipe (10) is arranged along the length of the vessel body (1) and has multiple outlets evenly opened on it. A handwheel (11) is provided on the steam outlet pipe (10). A steam discharge valve (8) is installed on the top of the vessel body (1).

2. The autoclave for aerated concrete panels as described in claim 1, characterized in that: A sealing strip (3) is provided on the contact surface between the vessel body (1) and the vessel door (2).

3. The autoclave for aerated concrete panels as described in claim 2, characterized in that: The electric heating tube (6) has an arc-shaped structure design.

4. The autoclave for aerated concrete panels as described in claim 3, characterized in that: The left and right sides of the mobile platform (4) are respectively hinged to the first limiting plate (13) via hinges (12), and the front and rear sides are also respectively hinged to the second limiting plate (14) via hinges (12). The first limiting plate (13) and the second limiting plate (14) are provided with threaded holes on the front and rear sides and the left and right sides of the second limiting plate (14). The first limiting plate (13) and the second limiting plate (14) are connected and fixed by screwing the threaded rod (15) into the threaded holes.

5. The autoclave for aerated concrete panels as described in claim 4, characterized in that: The bottom of the vessel body (1) is provided with multiple water receiving frames (16). The water receiving frame (16) located in the middle is connected to the water receiving frames (16) on the left and right sides respectively through the guide pipe (17) to form a condensate collection structure. The water receiving frames (16) on the left and right sides are each connected to a drain pipe. A ball valve (19) for controlling drainage is installed on the drain pipe (18).

6. The autoclave for aerated concrete panels as described in claim 5, characterized in that: The steam discharge valve (8) has a filter screen (20) embedded in the valve body outlet end.

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