An airlock door

Abstract

The application discloses an air-tight door and relates to the technical field of air-tight doors, in particular to an air-tight door which specifically comprises a driving structure and a door body, the driving structure comprises a fixed box, a synchronous belt is arranged in the inner cavity of the fixed box, the door body is fixedly connected with the synchronous belt through a translation plate, support rollers are movably connected to the two ends of the outer side of the translation plate, a metal round rod matched with the support rollers is fixedly connected to the inner cavity of the fixed box, a positioning groove is arranged on one side of the bottom end of the translation plate, and two positioning structures matched with the positioning groove are arranged on the end of the fixed box away from the metal round rod. The air-tight door is characterized in that the position of the door body is detected without contact through the cooperation of a signal generator and a signal receiver, and the precision of the opening and closing of the door body can be ensured; compared with the mode of setting a groove on the metal round rod to limit the door body in the prior art, the door body is limited by the positioning structures, the requirement for the driving structure can be reduced, and the working of the driving structure is facilitated.

Description

Technical Field

[0001] This invention relates to the field of airtight door technology, specifically to an airtight door. Background Technology

[0002] Airtight doors are sliding door sets that integrate airtightness, sound insulation, heat preservation, pressure resistance, dust prevention, fire prevention, and radiation protection. They are generally used in hospitals, food factories, industrial plants, and other places with high requirements for sound insulation, heat insulation, and airtightness. Airtight doors generally use small-volume, high-power DC brushless motors, which can operate without failure for a long time even with frequent opening and closing. Vacuum airtight rubber strips are installed around the door body to ensure that the door can fit tightly with the door frame when closed to achieve a reliable airtight effect.

[0003] The working principle of one type of airtight door in the prior art is as follows: a drive device drives rollers connected to the door to move on a metal rod. After the door is in position, the rollers sink into the grooves set on the metal rod to prevent the door from shifting. However, this type of airtight door requires a large driving force during the start-up phase, which places high demands on the drive device. Another type of airtight door in the prior art uses an inflatable airbag to achieve a seal between the door and the wall. When the door is closed, an air pump or other equipment is used to inflate the airbag, which expands to achieve a seal between the door and the wall. When the door is opened, the airbag deflates. However, in the use of this type of airtight door, the airbag is prone to fatigue and aging due to the high frequency of inflation and deflation, and may fail to return to its original position, affecting the movement and sealing of the door. Based on this, this application proposes an airtight door. Summary of the Invention

[0004] This invention provides an airtight door that solves the problems mentioned in the background art, such as the high requirements for the drive device caused by setting grooves on metal rods to limit the airtight door; and the problem that the airbags used to seal the gap between the door and the wall are prone to fatigue and failure to reset due to frequent inflation and deflation, which affects the movement and sealing of the door.

[0005] The present invention provides the following technical solution: an airtight door, comprising a drive structure and a door body, wherein the drive structure includes a fixed box, a synchronous belt is provided in the inner cavity of the fixed box, the door body and the synchronous belt are fixedly connected by a translation plate, support rollers are movably connected to both ends of the outer side of the translation plate, a metal rod adapted to the support rollers is fixedly connected in the inner cavity of the fixed box, a positioning groove is provided on one side of the bottom end of the translation plate, two positioning structures adapted to the positioning groove are provided on the side of the fixed box away from the metal rod, a signal generator is fixed on the side of the translation plate away from the support rollers, and two signal receivers adapted to the signal generator are fixed on the side of the fixed box away from the support rollers.

[0006] Both ends of the bottom of the door are movably connected to the walking wheels, and the door contacts the ground through the walking wheels. A groove is provided in the middle of the bottom of the door, and a lower sealing block is connected to the inner cavity of the groove through an electric telescopic rod. A sealing structure is fixed on the inner side of the lower sealing block.

[0007] The sealing structure includes a sealing cover, a support frame is fixedly connected to the middle of the inner cavity of the sealing cover, the support frame is fixedly connected to the top of the inner side of the lower sealing block, and a pressing plate is connected to the side of the support frame away from the door and the side closer to the door by a spring. The pressing plate is fixedly connected to the sealing cover, and the pressing plate is movably connected to the support frame by a positioning post. An electromagnet is embedded in the support frame, and the electromagnet is magnetically attracted to the pressing plate when energized.

[0008] Preferably, both ends of the inner cavity of the fixed box are movably connected to synchronous pulleys, and the two synchronous pulleys are connected by a synchronous belt drive. A controller and a servo motor are fixedly connected inside the inner cavity of the fixed box, and the output shaft end of the servo motor is connected to the synchronous pulley.

[0009] Preferably, a support frame is fixedly connected inside the cavity of the fixed box, and the support frame is provided with a limiting groove adapted to the timing belt, and the timing belt is movably connected to the cavity of the limiting groove.

[0010] Preferably, when the signal receiver receives the signal emitted by the signal generator, the positioning structure is aligned with the positioning slot, and one positioning structure and one signal receiver are installed in the open position, while another positioning structure and another signal receiver are installed in the closed position.

[0011] Preferably, the positioning structure includes a fixing block fixedly connected to the inner wall of the fixing box, a connecting rod fixedly connected to the bottom end of the other side of the fixing block, a positioning block adapted to the positioning groove being movably sleeved on the outer ring of the connecting rod, an electromagnet one fixedly fixed to the top end of the other side of the fixing block, and an electromagnet two fixedly fixed to the top end of the positioning block on the side close to the fixing block.

[0012] Preferably, the extrusion plate is fixedly connected to the front or back of the sealing cover, the front or back of the sealing cover is a hollow structure, the inner cavity of the front or back of the sealing cover is filled with gas, and a pressure sensor is fixed in the inner cavity of the front or back of the sealing cover.

[0013] Preferably, an infrared sensor is provided on one side of the door.

[0014] Preferably, the sidewall of the sealing cover is wavy, and the bottom of the sealing cover is flush with the bottom of the lower sealing block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This airtight door uses a signal generator and a signal receiver to perform non-contact detection of the door's position, ensuring the accuracy of the door's opening and closing. Compared to the existing technology that uses grooves on a metal rod to limit the door's position, this positioning structure reduces the requirements for the drive structure and facilitates its operation.

[0017] 2. This airtight door, through the setting of the sealing structure, can seal the gap between the door and the wall, which is convenient for the use of the airtight door; through the setting of the pressure sensor, the sealing cover can be detected, so that the damage to the sealing cover can be detected in time, and the elastic performance of the spring can be judged based on the pressure inside the sealing cover, so that the staff can replace the fatigued and aged sealing structure in time. Attached Figure Description

[0018] Figure 1 This is a front view of the structure of the present invention;

[0019] Figure 2 This is a front view of the rear of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom of the structure driving the structure of the present invention;

[0021] Figure 4 This is a front view of the cross-sectional structure of the structure driving the present invention;

[0022] Figure 5 This is a schematic diagram of the positioning structure of the present invention for positioning the translation plate;

[0023] Figure 6 This is an exploded view of the structural positioning structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the bottom of the structural door of the present invention;

[0025] Figure 8 This is an exploded view of the structural door of the present invention;

[0026] Figure 9 This is a schematic cross-sectional view of the sealing structure of the present invention.

[0027] In the diagram: 1. Fixing box; 2. Door body; 3. Infrared sensor; 4. Walking wheel; 5. Sealing structure; 6. Synchronous wheel; 7. Servo motor; 8. Controller; 9. Synchronous belt; 10. Signal receiver; 11. Translation plate; 12. Positioning structure; 13. Support roller; 14. Metal rod; 15. Support frame; 16. Fixing block; 17. Positioning block; 18. Electromagnet II; 19. Signal generator; 20. Connecting rod; 21. Electromagnet I; 22. Lower sealing block; 23. Groove; 24. Electric telescopic rod; 25. Sealing cover; 26. Support frame; 27. Electromagnet III; 28. Extrusion plate; 29. ​​Positioning column; 30. Spring; 31. Pressure sensor. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0029] This invention provides an airtight door, including a drive structure and a door body 2. The drive structure includes a fixed box 1, with synchronous pulleys 6 movably connected to both ends of the inner cavity of the fixed box 1. The two synchronous pulleys 6 are connected by a synchronous belt 9. A controller 8 and a servo motor 7 are fixedly connected inside the inner cavity of the fixed box 1. The output shaft of the servo motor 7 is connected to the synchronous pulleys 6 through a reducer. Through the servo motor 7, the rotation of the servo motor 7 can drive the synchronous pulleys 6 fixedly connected to it to rotate, and the synchronous pulleys 6 drive the synchronous belt 9 meshing with them to rotate.

[0030] A support frame 15 is fixedly connected inside the cavity of the fixed box 1. The support frame 15 is provided with a limiting groove that is adapted to the synchronous belt 9. The synchronous belt 9 is movably connected to the cavity of the limiting groove. Through the setting of the support frame 15, the support frame 15 can limit and support the synchronous belt 9, so that the synchronous belt 9 can be kept in a horizontal state, which is convenient for the use of the synchronous belt 9.

[0031] A translation plate 11 is fixed on the synchronous belt 9. Support rollers 13 are movably connected to both ends of the outer side of the translation plate 11. A metal rod 14 adapted to the support rollers 13 is fixedly connected inside the cavity of the fixed box 1. With the support rollers 13 and the metal rod 14, the metal rod 14 can support the translation plate 11 through the support rollers 13, so that the synchronous belt 9 can drive the translation plate 11 to move.

[0032] The bottom of the sliding plate 11 is fixedly connected to the top of the door body 2. Both ends of the bottom of the door body 2 are movably connected to the traveling wheels 4, and the door body 2 contacts the ground through the traveling wheels 4.

[0033] A positioning groove is provided on one side of the bottom end of the sliding plate 11. Two positioning structures 12 adapted to the positioning groove are provided on the side of the fixed box 1 away from the metal rod 14. A signal generator 19 is fixed on the side of the sliding plate 11 away from the support roller 13. Two signal receivers 10 adapted to the signal generator 19 are fixed on the side of the fixed box 1 away from the support roller 13. When the signal receiver 10 receives the signal emitted by the signal generator 19, the positioning structure 12 is aligned with the positioning groove. One positioning structure 12 and one signal receiver 10 are installed in the open position, and the other positioning structure 12 and the other signal receiver 10 are installed in the closed position.

[0034] As described above, the signal receiver 10 and signal generator 19 can perform non-contact detection of the door 2's position, ensuring the door 2's movement accuracy. Furthermore, the positioning structure 12 limits the door 2's position, ensuring its stability in both open and closed positions. Compared to the prior art's use of grooves on a metal rod to prevent door movement, this application utilizes the positioning structure 12 to limit the door's position, reducing the requirements on the drive structure.

[0035] In some embodiments of this application, the positioning structure 12 includes a fixing block 16 fixedly connected to the inner wall of the fixing box 1. A connecting rod 20 is fixedly connected to the bottom end of the other side of the fixing block 16. A positioning block 17 adapted to the positioning groove is movably sleeved on the outer ring of the connecting rod 20. An electromagnet 11 is fixedly fixed to the top end of the other side of the fixing block 16. An electromagnet 28 is fixedly fixed to the top end of the side of the positioning block 17 close to the fixing block 16. With the setting of electromagnet 11 and electromagnet 28, when energized, electromagnet 11 and electromagnet 28 are in a magnetically attracted state, the positioning block 17 can approach the fixing block 16, thereby moving the positioning block 17 away from the sliding plate 11. The sliding plate 11 is released from restriction, and the door 2 can be opened and closed. When electromagnet 11 and electromagnet 28 are in a state of magnetic repulsion, the positioning block 17 moves away from the fixed block 16 and can be inserted into the positioning groove of the sliding plate 11, so that the sliding plate 11 is restricted by the positioning block 17 and the door 2 cannot move, so that the airtight door can remain stable when opening or closing.

[0036] A groove 23 is provided in the middle of the bottom of the door body 2. A lower sealing block 22 is connected to the inner cavity of the groove 23 by an electric telescopic rod 24. A sealing structure 5 is fixed on the inner side of the lower sealing block 22, and the bottom of the sealing structure 5 is flush with the bottom of the lower sealing block 22. By setting the electric telescopic rod 24, the extension and retraction of the electric telescopic rod 24 can change the height of the lower sealing block 22 and the sealing structure 5 fixedly connected to it. When the lower sealing block 22 and the sealing structure 5 are in contact with the ground, the bottom of the door body 2 can be sealed by the lower sealing block 22 and the sealing structure 5. When the lower sealing block 22 and the sealing structure 5 are separated from the ground, it is convenient for the door body 2 to move.

[0037] The aforementioned sealing structure 5 includes a sealing cover 25. A support frame 26 is fixedly connected to the center of the inner cavity of the sealing cover 25. The support frame 26 is fixedly connected to the top of the inner side of the lower sealing block 22. A compression plate 28 is connected to both the side of the support frame 26 away from the door body 2 and the side closer to the door body 2 via a spring 30, with the spring 30 in a contracted state. The compression plate 28 is fixedly connected to the front or back of the sealing cover 25. The front or back of the sealing cover 25 is a hollow structure, and the inner cavity of the front or back of the sealing cover 25 is filled with gas. A pressure sensor 31 is fixedly installed inside the inner cavity of the front or back of the sealing cover 25. The pressure sensor 31 allows for detection of leaks in the sealing cover 25. The sidewalls of the sealing cover 25 are wavy and extendable, allowing the distance between the compression plate 28 and the support frame 26 to change.

[0038] The extrusion plate 28 and the support frame 26 are movably connected by the positioning post 29. An electromagnet 27 is embedded in the support frame 26. When the electromagnet 27 is energized, it is magnetically attracted to the extrusion plate 28.

[0039] As can be seen from the above description of the sealing structure 5, when the electromagnet 27 is de-energized, the pressing plate 28 moves away from the support frame 26 under the action of the spring 30's rebound force, and the sealing cover 25 can seal the gap between the door body 2 and the wall, facilitating the use of the airtight door; when the electromagnet 27 is energized, the attraction between the electromagnet 27 and the pressing plate 28 causes the pressing plate 28 to move closer to the support frame 26, and the pressing plate 28 drives the sealing cover 25 to move, so that the sealing structure 5 can be separated from the wall and the door body 2, facilitating the movement of the sealing structure 5 and the door body 2.

[0040] An infrared sensor 3 is installed on one side of the door 2. The infrared sensor 3 can detect whether someone is passing by during the opening and closing of the door, so as to avoid people being caught when the door is closed.

[0041] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0042] In summary: When the airtight door is in use, the servo motor 7 drives the door body 2 to move. During the movement of the door body 2, the signal generator 19 sends a signal. When the signal receiver 10 receives the signal, the door body 2 moves to the open or closed position. At this time, the servo motor 7 stops working, the positioning structure 12 works, and the positioning block 17 in the positioning structure 12 moves away from the fixed block 16 and is stuck in the positioning groove. The positioning block 17 is used to position the translation plate 11, so that the door body 2 remains stable when opening or closing.

[0043] When the door 2 is in the closed position, after the position of the door 2 is fixed, the electric telescopic rod 24 extends. The electric telescopic rod 24 drives the lower sealing block 22 and the sealing structure 5 to seal the bottom of the door 2. The electromagnet 3 27 is in the de-energized state. Under the action of the spring 30 connected to it, the pressing plate 28 drives the sealing cover 25 to move until the sealing cover 25 is tightly attached to the door 2 or the wall. The sealing cover 25 seals the gap between the door 2 and the wall, ensuring the airtightness of the airtight door and facilitating its use.

[0044] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An airtight door, comprising a drive structure and a door body (2), characterized in that: The drive structure includes a fixed box (1), and a synchronous belt (9) is provided in the inner cavity of the fixed box (1). The door (2) and the synchronous belt (9) are fixedly connected by a translation plate (11). Support rollers (13) are movably connected to both ends of the outer side of the translation plate (11). A metal rod (14) adapted to the support roller (13) is fixedly connected in the inner cavity of the fixed box (1). A positioning groove is provided on one side of the bottom end of the translation plate (11). Two positioning structures (12) adapted to the positioning groove are provided on one end of the fixed box (1) away from the metal rod (14). A signal generator (19) is fixed on one side of the translation plate (11) away from the support roller (13). Two signal receivers (10) adapted to the signal generator (19) are fixed on one side of the fixed box (1) away from the support roller (13). Both ends of the bottom of the door (2) are movably connected with walking wheels (4). The door (2) contacts the ground through the walking wheels (4). The bottom of the door (2) is provided with a groove (23). The inner cavity of the groove (23) is connected to a lower sealing block (22) through an electric telescopic rod (24). A sealing structure (5) is fixed on the inner side of the lower sealing block (22). The sealing structure (5) includes a sealing cover (25). A support frame (26) is fixedly connected to the middle of the inner cavity of the sealing cover (25). The support frame (26) is fixedly connected to the top of the inner side of the lower sealing block (22). The side of the support frame (26) away from the door body (2) and the side close to the door body (2) are both connected to a pressing plate (28) by a spring (30). The pressing plate (28) is fixedly connected to the sealing cover (25). The pressing plate (28) is connected to the front of the sealing cover (25). The sealing cover (25) is hollow on the front or back, and the inner cavity of the sealing cover (25) is filled with gas. A pressure sensor (31) is fixed in the inner cavity of the sealing cover (25). The extrusion plate (28) and the support frame (26) are movably connected by a positioning post (29). An electromagnet (27) is embedded in the support frame (26). The electromagnet (27) is magnetically attracted to the extrusion plate (28) when energized. When the signal receiver (10) receives the signal from the signal generator (19), the positioning structure (12) is aligned with the positioning slot, and one positioning structure (12) and one signal receiver (10) are installed in the open position, and another positioning structure (12) and another signal receiver (10) are installed in the closed position. The positioning structure (12) includes a fixing block (16) fixedly connected to the inner wall of the fixing box (1). A connecting rod (20) is fixedly connected to the bottom end of the other side of the fixing block (16). A positioning block (17) adapted to the positioning groove is movably sleeved on the outer ring of the connecting rod (20). An electromagnet one (21) is fixed to the top end of the other side of the fixing block (16). An electromagnet two (18) is fixed to the top end of the positioning block (17) on the side close to the fixing block (16).

2. An airtight door according to claim 1, characterized in that: Both ends of the inner cavity of the fixed box (1) are movably connected to synchronous pulleys (6), and the two synchronous pulleys (6) are connected by a synchronous belt (9). The inner cavity of the fixed box (1) is fixedly connected to a controller (8) and a servo motor (7), and the end of the output shaft of the servo motor (7) is connected to the synchronous pulley (6).

3. An airtight door according to claim 1, characterized in that: The inner cavity of the fixed box (1) is fixedly connected to a support frame (15), and the support frame (15) is provided with a limiting groove adapted to the synchronous belt (9). The synchronous belt (9) is movably connected to the inner cavity of the limiting groove.

4. An airtight door according to claim 1, characterized in that: An infrared sensor (3) is provided on one side of the door (2).

5. An airtight door according to claim 1, characterized in that: The sidewall of the sealing cover (25) is wavy, and the bottom of the sealing cover (25) is flush with the bottom of the lower sealing block (22).

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