Gas film bin sealing device

Abstract

The invention belongs to the technical field of air film building equipment, and particularly relates to an air film bin sealing device. According to the air film bin sealing device, the clamping main body can replace a linear air bag to extrude the film cloth edge of the air film bin into the fixing groove of the base, rapid sealing of the air film bin is achieved, and the included angle between the plane where the second fixing plate is located and the plane where the first fixing plate is located can be adjusted and limited through the driving device; and the first fixing plate and the second fixing plate can be matched with the bottoms of the fixing grooves with different curvatures, so that the edge of the film cloth can be tightly pressed at the bottoms of the fixing grooves, the situation that the air film bin leaks air at the bent positions of the bottoms of the fixing grooves is avoided, and the sealing effect on the air film bin is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of air-supported membrane building equipment, and specifically relates to an air-supported membrane chamber sealing device. Background Technology

[0002] An air-supported membrane structure is a large-span building that uses an inflatable membrane structure to create a stable space. It has advantages such as fast construction, low cost, energy saving and environmental protection, and is widely used in industrial warehousing, sports stadiums and other fields.

[0003] Currently, the sealing methods for air-supported membrane structures mainly include two types: mechanical compression sealing and air-expansion sealing; among them, Mechanical pressure sealing is achieved by pressing the edge of the membrane cloth with a pressure plate or channel steel, and fixing it with bolts passing through the pressure plate or channel steel and the membrane cloth. Inflatable expansion seals utilize a hose or airbag to inflate and press the edge of the membrane fabric into a fixed groove in the base, thereby sealing the air membrane chamber.

[0004] When using the aforementioned mechanical pressure sealing method to seal the air-supported membrane structure, workers need to tighten hundreds of bolts, and the installation time accounts for more than 60% of the total construction time. Furthermore, differences in bolt preload can lead to stress concentration in the membrane structure, which can easily cause the membrane to tear or leak. Leak detection and repair can increase the construction cost of the air-supported membrane structure by 30%. Exposed metal parts (bolts, pressure plates, and channel steel) will rust in humid environments, reducing their lifespan to 5-8 years. When using the aforementioned inflatable seal to seal the air-supported membrane chamber, the straight airbags are difficult to fit the bottom of the fixed groove with a radius of curvature greater than 10m. The leakage rate at the bend of the fixed groove bottom increases by 50%, affecting the performance of the air-supported membrane chamber. Summary of the Invention

[0005] This invention provides an air-supported membrane chamber sealing device to solve the technical problems of long installation time or poor sealing effect in the existing air-supported membrane chamber sealing methods.

[0006] This invention is achieved through the following technical solution: An air-supported membrane chamber sealing device includes a hinge shaft, a drive device, a first fixing plate, and a second fixing plate; Two spaced-apart wing plates are provided on one side of the first fixed plate. The wing plates are provided with shaft holes that match the hinge shaft. The first fixed plate is rotatably mounted on the hinge shaft through the wing plates. The second fixing plate is fixedly connected to the hinge shaft. The second fixing plate, the hinge shaft, and the first fixing plate together form the clamping body. The width of the clamping body matches the width of the fixing groove on the base. The driving device is mounted on the first fixed plate. The driving end of the driving device is connected to the hinge shaft for driving the hinge shaft to rotate, thereby causing the second fixed plate to rotate around the axis of the hinge shaft, so as to adjust the angle between the plane of the second fixed plate and the plane of the first fixed plate.

[0007] To better realize the present invention, the above structure is further optimized, and the driving device includes a heating unit, a telescopic bar, and a rack; A gear is coaxially mounted on the hinge shaft; The heating unit is located on the back of the first fixing plate; The rack is slidably disposed on the back of the first fixed plate in a direction that moves closer to or away from the second fixed plate, and the rack meshes with the gear; The telescopic strip is made of shape memory alloy. One end of the telescopic strip is set on the heating surface of the heating unit, and the other end of the telescopic strip is connected to the rack. The heating unit can heat the telescopic strip, allowing it to switch between an initial state and a working state. The length of the telescopic strip in the initial state is shorter than the length of the telescopic strip in the working state.

[0008] To better realize the present invention, further optimizations are made to the above structure, and the driving device further includes a pressure sensor and a controller; The pressure sensor is located on the front of the second mounting plate; Both the pressure sensor and the heating unit are connected to the controller signal.

[0009] To better realize the present invention, the above structure is further optimized by providing a first slot and a first plug on the side of the first fixing plate away from the hinge axis. The second fixing plate has a second plug that matches the first slot on the side away from the hinge axis, and a second slot that matches the first plug.

[0010] To better realize the present invention, the above structure is further optimized by providing magnets at the bottom of both the first slot and the second slot. Both the first plug and the second plug are made of a metal material that can be attracted by a magnet.

[0011] To better realize the present invention, the above structure is further optimized by providing airbags on the back of the first fixing plate and the back of the second fixing plate, and the two airbags are connected by an air tube.

[0012] Compared with the prior art, the present invention has the following advantages: In the air-supported membrane chamber sealing device provided by the present invention, the clamping body can replace the linear airbag to squeeze the edge of the membrane fabric of the air-supported membrane chamber into the fixing groove of the base, thereby achieving rapid sealing of the air-supported membrane chamber. Moreover, the angle between the plane of the second fixing plate and the plane of the first fixing plate can be adjusted and limited by the driving device, so that the first fixing plate and the second fixing plate can be adapted to the bottom of the fixing groove with different curvatures, so as to press the edge of the membrane fabric tightly into the bottom of the fixing groove, thereby avoiding air leakage at the bending point of the bottom of the fixing groove, thus improving the sealing effect of the air-supported membrane chamber. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an air film chamber sealing device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the drive device (without an airbag) in an air-film chamber sealing device of the present invention.

[0016] Figure 3 This is a schematic diagram of the bottom structure of an air film chamber sealing device according to the present invention.

[0017] Figure 4 This is a schematic diagram of the drive device in an air-film chamber sealing device of the present invention.

[0018] In the picture: 1. Hinge shaft; 11. Gear; 2. Drive unit; 21. Heating unit; 22. Telescopic bar; 23. Rack; 24. Pressure sensor; 25. Controller; 3. First fixing plate; 31. Wing plate; 32. First slot; 33. First plug; 4. Second fixing plate; 5. Airbags. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] In the embodiments of this application, such as Figures 1 to 4 As shown, the air-supported membrane chamber sealing device includes a hinge shaft 1, a drive device 2, a first fixing plate 3, and a second fixing plate 4; wherein, Two spaced-apart wing plates 31 are provided on one side of the first fixed plate 3. The wing plates 31 are provided with shaft holes that match the hinge shaft 1. The first fixed plate 3 is rotatably mounted on the hinge shaft 1 through the wing plates 31. The second fixing plate 4 is fixedly connected to the hinge shaft 1. The second fixing plate 4, the hinge shaft 1, and the first fixing plate 3 together form the clamping body. The width of the clamping body matches the width of the fixing groove on the base. The drive device 2 is mounted on the first fixed plate 3, and the drive end of the drive device 2 is connected to the hinge shaft 1 for transmission.

[0023] When using the air-supported membrane sealing device to seal the edge of the membrane fabric of the air-supported membrane, the operator can first place the edge of the membrane fabric in the fixing groove of the base, adjust the direction of the clamping body so that the length direction of the clamping body is consistent with the extension direction of the fixing groove, the width direction of the clamping body is consistent with the width direction of the fixing groove, and make the front of the first fixing plate 3 and the front of the second fixing plate 4 face the bottom of the fixing groove. The main body of the device is inserted into the fixing groove, and the edge of the membrane cloth is squeezed and fixed in the fixing groove by the main body of the device, eliminating the steps of installation and tightening bolts, and realizing the rapid sealing of the air membrane chamber. When encountering a curved position at the bottom of the fixed groove, the hinge shaft 1 can be driven to rotate by the drive device 2, causing the second fixed plate 4 to rotate with the hinge shaft 1. This adjusts the angle between the plane of the second fixed plate 4 and the plane of the first fixed plate 3, ensuring that the second fixed plate 4 and the first fixed plate 3 fit tightly against the bottom of the fixed groove and preventing air leakage. At this time, the drive end of the drive device 2 stops moving to limit the position of the second fixed plate 4 and prevent it from changing position, thereby improving the sealing effect of the air film chamber sealing device on the air film chamber.

[0024] It is worth noting that the air film chamber sealing device can be used in conjunction with the existing linear airbag for sealing. That is, the linear airbag is used to seal the bottom of the fixed groove when it is not curved, and when it encounters the curved bottom of the fixed groove, the air film chamber sealing device is locked at the curved bottom of the fixed groove to achieve the sealing of the air film chamber. Of course, the air-supported membrane chamber sealing device can also be used alone to seal the air-supported membrane chamber; specifically, multiple air-supported membrane chamber sealing devices are selected and arranged sequentially along the extension direction of the fixed groove so that the edge of the membrane cloth is completely squeezed into the fixed groove to achieve the sealing of the air-supported membrane chamber.

[0025] In some embodiments, the first fixing plate 3 is provided with a first slot 32 and a first plug 33 on the side away from the hinge shaft 1, see [link to previous document]. Figure 2 and Figure 3 ; The second fixing plate 4 is provided with a second plug (not shown in the figure) that matches the first slot 32 on the side away from the hinge axis 1, and a second slot (not shown in the figure) that matches the first plug 33. When the air-supported membrane chamber sealing device is used alone to seal the air-supported membrane chamber, two adjacent air-supported membrane chamber sealing devices can be connected by the first slot 32 and the first plug 33 on the first fixing plate 3 and the second plug and the second slot on the second fixing plate 4 to form a strip-shaped sealing device. This facilitates the pressing and fixing of the edge of the membrane cloth in the fixing groove to achieve the sealing of the air-supported membrane chamber. Furthermore, the insertion and connection of two adjacent air-supported membrane chamber sealing devices can avoid gaps and leakage, thereby achieving a better seal for the air-supported membrane chamber.

[0026] Preferably, the bottom of both the first slot 32 and the second slot is provided with a magnet; Both the first plug 33 and the second plug are made of metal material that can be attracted by a magnet, so that the connection between the two adjacent air film chamber sealing devices is tighter, and leakage is further avoided due to gaps between the two adjacent air film chamber sealing devices.

[0027] In this embodiment, the first plug 33 and the second plug can be made of metal materials such as iron, cobalt, nickel, and some alloys containing these elements, stainless steel, etc.

[0028] In some embodiments, the drive device 2 described above includes a heating unit 21, a telescopic bar 22, and a rack 23, see [link to documentation]. Figure 2 and Figure 4 ;in, A gear 11 is coaxially mounted on the hinge shaft 1; The heating unit 21 is disposed on the back of the first fixing plate 3; The rack 23 is slidably disposed on the back of the first fixed plate 3 in a direction that approaches or moves away from the second fixed plate 4, and the rack 23 meshes with the gear 11; The telescopic strip 22 is made of shape memory alloy. One end of the telescopic strip 22 is set on the heating surface of the heating unit 21, and the other end of the telescopic strip 22 is connected to the rack 23. The heating unit 21 can heat the telescopic bar 22, allowing the telescopic bar 22 to switch between an initial state and a working state. In this embodiment, the length of the telescopic bar 22 in the initial state is less than the length of the telescopic bar 22 in the working state.

[0029] When in use, the operator can first insert the air film chamber sealing device into the fixing groove, and make the front of the first fixing plate 3 and the front of the second fixing plate 4 tightly adhere to the membrane cloth at the bottom of the fixing groove. Subsequently, the heating unit 21 is activated to heat the telescopic strip 22, so that the telescopic strip 22 changes from the initial state to the working state. That is, the length of the telescopic strip 22 increases, so as to drive the rack 23 to move closer to the second fixed plate 4, drive the hinge shaft 1 to rotate, so as to synchronously drive the front of the second fixed plate 4 to press the membrane cloth at the bottom of the fixed groove, thereby achieving the sealing of the air film chamber.

[0030] It is worth noting that the aforementioned memory alloy is a shape memory alloy, a smart material that can recover a preset shape within a specific temperature range. Its properties originate from the reversible phase transformation of the internal austenite and martensite crystal structure, and it is widely used in fields such as medicine, aerospace, and construction.

[0031] In some embodiments, the drive device 2 described above further includes a pressure sensor 24 and a controller 25, see [link to documentation]. Figure 2 , Figure 3 and Figure 4 ;in, Pressure sensor 24 is disposed on the front of the second fixed plate 4; Both pressure sensor 24 and heating unit 21 are connected to controller 25 via signal. When the telescopic bar 22 drives the rack 23 to drive the hinge shaft 1 to rotate, the front of the second fixing plate 4 will be tightly pressed against the membrane cloth at the bottom of the fixing groove under the action of the hinge shaft 1, pressing the membrane cloth into the fixing groove to achieve a seal for the air film chamber; the pressure sensor 24 on the second fixing plate 4 can monitor the pressure on the front of the second fixing plate 4 and feed it back to the controller 25, which will determine whether the second fixing plate 4 has pressed the membrane cloth tightly. When the pressure monitored by the pressure sensor 24 is less than 0.5 MPa, it is determined that the second fixing plate 4 has not pressed the membrane cloth tightly. The controller 25 will then control the heating unit 21 to work and heat the telescopic strip 22 to drive the hinge shaft 1 to rotate, thereby increasing the pressure of the second fixing plate 4 on the membrane cloth.

[0032] In this embodiment, the power supply for the heating unit 21 and the controller 25 can be a storage battery and / or a photovoltaic cell, providing the necessary electrical energy for the operation of the heating unit 21 and the controller 25; the controller 25 can be a PLC controller or a controller 25 in the prior art that can receive, process and send control signals, that is, it can receive the pressure information monitored by the pressure sensor 24 and make a judgment; and when the judged pressure is less than 0.5MPa, the controller that controls the operation of the heating unit 21 can be any controller.

[0033] In some embodiments, airbags 5 are provided on the back of both the first fixing plate 3 and the second fixing plate 4, see [reference]. Figure 1 The two airbags 5 are connected by a trachea; After the airbag 5 inflates, it can squeeze the membrane cloth on the wall of the fixed groove against the wall of the fixed groove, sealing the dead corners and improving the sealing effect of the air film chamber sealing device on the air film chamber.

[0034] In this embodiment, the airbag 5 is made of aramid fiber reinforced rubber (burst pressure ≥1.2MPa), which can tightly squeeze the membrane cloth against the wall of the fixed groove when it expands, thus achieving a good sealing effect.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sealing device for an air-supported membrane chamber, characterized in that: It includes a hinge shaft (1), a drive device (2), a first fixing plate (3), and a second fixing plate (4); Two spaced wing plates (31) are provided on one side of the first fixed plate (3). The wing plates (31) are provided with shaft holes that match the hinge shaft (1). The first fixed plate (3) is rotatably mounted on the hinge shaft (1) through the wing plates (31). The second fixing plate (4) is fixedly connected to the hinge shaft (1). The second fixing plate (4), the hinge shaft (1), and the first fixing plate (3) together form the clamping body. The width of the clamping body matches the width of the fixing groove on the base. The driving device (2) is set on the first fixed plate (3). The driving end of the driving device (2) is connected to the hinge shaft (1) for driving the hinge shaft (1) to rotate, so as to drive the second fixed plate (4) to rotate around the axis of the hinge shaft (1) and realize the adjustment of the angle between the plane where the second fixed plate (4) is located and the plane where the first fixed plate (3) is located.

2. The air film chamber sealing device according to claim 1, characterized in that: The drive device (2) includes a heating unit (21), a telescopic bar (22), and a rack (23). A gear (11) is coaxially mounted on the hinge shaft (1). The heating unit (21) is disposed on the back of the first fixing plate (3); The rack (23) is slidably disposed on the back of the first fixed plate (3) in a direction closer to or further away from the second fixed plate (4), and the rack (23) meshes with the gear (11); The telescopic bar (22) is made of shape memory alloy. One end of the telescopic bar (22) is set on the heating surface of the heating unit (21), and the other end of the telescopic bar (22) is connected to the rack (23). The heating unit (21) can heat the telescopic bar (22) so that the telescopic bar (22) can switch between the initial state and the working state. The length of the telescopic bar (22) in the initial state is less than the length of the telescopic bar (22) in the working state.

3. The air film chamber sealing device according to claim 2, characterized in that: The drive device (2) also includes a pressure sensor (24) and a controller (25). The pressure sensor (24) is disposed on the front of the second fixing plate (4); The pressure sensor (24) and the heating unit (21) are both signal-connected to the controller (25).

4. The air film chamber sealing device according to claim 1, characterized in that: The first fixing plate (3) is provided with a first slot (32) and a first plug (33) on the side away from the hinge axis (1); The second fixing plate (4) is provided with a second plug that matches the first slot (32) and a second slot that matches the first plug (33) on the side away from the hinge axis (1).

5. The air film chamber sealing device according to claim 4, characterized in that: Magnets are provided at the bottom of both the first slot (32) and the second slot; Both the first plug (33) and the second plug are made of a metal material that can be attracted by a magnet.

6. The air film chamber sealing device according to any one of claims 1 to 5, characterized in that: Airbags (5) are provided on the back of the first fixing plate (3) and the back of the second fixing plate (4), and the two airbags (5) are connected by an air tube.

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