Threshold-free protective door locking device

Abstract

The invention provides a doorsill-free protective door locking device, the protective door comprises a door frame and a door leaf, the door leaf is connected with the door frame, the locking device is arranged on the inner side wall of the door leaf, the locking device comprises a locking mechanism, the locking mechanism is connected with the door leaf, and after the door leaf is closed, the locking mechanism is connected with the door leaf, and the door leaf is locked by the locking mechanism. The locking mechanism can fix the door leaf on the door frame; and the turnover sealing mechanism is arranged at the bottom of the door leaf, the turnover sealing mechanism is connected with the locking mechanism, and under the driving of the locking mechanism, the turnover sealing mechanism can seal a gap between the bottom of the door leaf and the bottom of the door frame. According to the locking device, through linkage of the overturning sealing mechanism and the locking mechanism, the lifting action of the overturning sealing beam and the locking action of the door leaf are combined into a whole, synchronous operation is achieved, and therefore the structure is simplified, space is saved, and operation time is shortened.

Description

Technical Field

[0001] This invention relates to the field of civil defense door technology, and in particular to a thresholdless protective door locking device. Background Technology

[0002] The existing bottom sealing technology for thresholdless protective airtight doors has the following main problems:

[0003] 1. Complex structure and large space occupation: Traditional sealing beams usually require a separate drive device, which not only increases the mechanical complexity inside the door leaf, but also puts forward higher requirements on the thickness of the door body and the internal space layout.

[0004] 2. Cumbersome and time-consuming operation: Because the sealing and locking systems are two independent systems, operators need to perform two separate actions, one after the other: first, operate the locking mechanism to lock the door to the door frame, and then operate the driving mechanism of the sealing beam to lower it and press the sealing strip. In an emergency, this step-by-step operation will delay the rapid closing of the protective door.

[0005] 3. Uneven sealing pressure, reliability needs to be improved: Some early designs rely solely on the vertical downward pressure of the sealing beam for sealing. When facing high water pressure, the lateral clamping force between the sealing beam and the door body may be insufficient, posing a risk of leakage.

[0006] Therefore, a thresholdless protective door locking device is needed to solve the problems of existing thresholdless protective airtight doors, such as the separation of the bottom sealing beam from the locking mechanism, cumbersome operation, and complex structure. Summary of the Invention

[0007] The purpose of this invention is to provide a thresholdless security door locking device. This locking device links the bottom sealing beam with the locking mechanism, so that the lifting and lowering of the bottom sealing beam and the locking action of the door leaf are combined into one, achieving synchronous operation, thereby simplifying the structure, saving space and shortening the operation time.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A thresholdless security door locking device is disclosed. The security door includes a door frame and a door leaf connected to the door frame. The locking device is disposed on the inner side wall of the door leaf and includes: a locking mechanism connected to the door leaf, which, when the door leaf is closed, can fix the door leaf to the door frame; and a flip-sealing mechanism disposed at the bottom of the door leaf and connected to the locking mechanism, which, driven by the locking mechanism, can seal the gap between the bottom of the door leaf and the bottom of the door frame.

[0010] Furthermore, in the aforementioned thresholdless security door locking device, the locking mechanism includes a handwheel, a worm gear reducer, a transmission assembly, an upper locking assembly, and a lower locking assembly. The worm gear reducer is located in the middle of the door leaf. The handwheel is connected to the worm gear reducer; rotating the handwheel drives the worm gear reducer to rotate. Two transmission assemblies are provided, symmetrically installed on the left and right sides of the worm gear reducer. The worm gear reducer has two reducer output shafts, each of which is connected to one of the transmission assemblies. The upper locking assembly includes an upper... The system includes a lock head and an upper locking seat. The upper locking seat is fixed to the door leaf, and the upper lock head is disposed within the upper locking seat and can slide up and down within the upper locking seat. The lower locking assembly includes a lower lock head and a lower locking seat. The lower locking seat is fixed to the door leaf, and the lower lock head is disposed within the lower locking seat and can slide up and down within the lower locking seat. Both the upper and lower locking assemblies are connected to the transmission assembly. The worm gear reducer, through the transmission assembly, can push the upper and lower lock heads to be inserted into the lock holes of the door frame, respectively.

[0011] Furthermore, in the aforementioned thresholdless security door locking device, the transmission assembly includes a transverse connecting rod, a spiral bevel gear commutator, an upper lead screw, an upper connecting rod, and an upper output shaft sleeve. The spiral bevel gear commutator is mounted on the door leaf via a mounting base. The transverse connecting rod is arranged horizontally, with one end connected to the output shaft of the reducer, and the other end connected to the spiral bevel gear commutator via a commutator connecting rod. The mounting base is arranged vertically, and an upper shaft sleeve seat is provided at the upper end of the mounting base. The spiral bevel gear commutator has an upper output shaft. The lower end of the upper output shaft sleeve is fitted onto the upper output shaft. The upper end of the upper output shaft sleeve is located inside the upper shaft sleeve seat. The upper end of the upper output shaft sleeve is provided with an internal trapezoidal thread. The lower end of the upper lead screw is provided with an external trapezoidal thread. The lower end of the upper lead screw is threaded to the end of the upper output shaft sleeve. The upper end of the upper lead screw is connected to the lower end of the upper connecting rod. The commutator connecting rod and the transverse connecting rod are connected by a pin.

[0012] Furthermore, in the aforementioned thresholdless protective door locking device, there are two upper locking components. The lower end of the upper locking head of one upper locking component is connected to the upper end of the upper connecting rod of one transmission component, and the lower end of the upper locking head of the other upper locking component is connected to the upper end of the upper connecting rod of the other transmission component. The upper connecting rod can push the upper end of the upper locking head to extend out from the upper locking seat.

[0013] Furthermore, the aforementioned thresholdless protective door locking device also includes an upper lifting link, which is horizontally arranged on the upper part of the door leaf. One end of the upper lifting link is connected to the upper end of the upper link of one of the transmission components, and the other end of the upper lifting link is connected to the upper end of the upper link of another transmission component. Four upper locking components are provided, arranged sequentially along the width direction of the door leaf. Two upper locking components are symmetrically installed near the edges of both sides of the door leaf, and the other two upper locking components are symmetrically installed in the middle of the door leaf. The lower ends of the upper lock heads of the four upper locking components are all connected to the upper lifting link.

[0014] Furthermore, in the aforementioned thresholdless protective door locking device, the transmission assembly further includes a lower lead screw, a sliding connection support, and a sliding connection arm. The helical bevel gear commutator has a lower output shaft. A lower shaft sleeve is provided at the lower end of the mounting base. The upper end of the lower output sleeve is fitted onto the lower output shaft of the commutator. The lower end of the lower output sleeve is located inside the lower shaft sleeve support. The lower end of the lower output sleeve is provided with an internal trapezoidal thread. The upper end of the lower lead screw is provided with an external trapezoidal thread. The upper end of the lower lead screw is threadedly connected to the lower end of the lower output sleeve. The lower end of the lower lead screw is connected to the sliding connection arm. The sliding connection support is provided on the door leaf. A sliding rod is provided on the sliding connection support. An elongated hole is vertically provided on the sliding connection arm. The sliding rod is located inside the elongated hole. The sliding rod and the elongated hole cooperate to allow the sliding connection arm to slide on the sliding connection support.

[0015] Furthermore, the aforementioned thresholdless protective door locking device also includes a lower lifting link, which is horizontally arranged at the lower part of the door leaf. Four lower locking components are provided, which are arranged sequentially along the width direction of the door leaf. Two lower locking components are symmetrically installed at the edges near both sides of the door leaf, and the other two lower locking components are symmetrically installed in the middle of the door leaf.

[0016] Furthermore, in the aforementioned thresholdless protective door locking device, the flip-sealing mechanism includes a flip-sealing component and a flip-sealing beam. The flip-sealing beam is horizontally arranged at the bottom of the door leaf. The upper end of the flip-sealing component is connected to the lower lifting linkage, and the lower end of the flip-sealing component is connected to the flip-sealing beam. During the lifting and lowering process, the lower lifting linkage drives the flip-sealing beam to flip through the flip-sealing component. The flip-sealing beam achieves a seal between the door leaf and the ground by flipping. A flip-sealing component is arranged between two adjacent lower locking components.

[0017] Furthermore, in the aforementioned thresholdless protective door locking device, the flip-sealing assembly includes an adjusting rod and a flip support. The upper end of the adjusting rod is hinged to the lower lifting rod, the upper end of the flip-sealing beam is hinged to the lower end of the flip support, and the lower end of the adjusting rod is hinged to the middle of the flip-sealing beam. A first groove is provided on one side of the flip-sealing beam near the door leaf, forming an inclined upper inner wall of the first groove. The opening width of the first groove is smaller than the bottom width of the groove. A first sealing strip is provided in the first groove, which can seal between the flip-sealing beam and the door leaf. A second groove is provided at the bottom of the flip-sealing beam, forming a inclined inner wall of the second groove near the door leaf. The opening width of the second groove is smaller than the bottom width of the groove. A second sealing strip is provided in the second groove, which can seal between the flip-sealing beam and the bottom of the door frame.

[0018] Furthermore, in the aforementioned thresholdless protective door locking device, a protrusion is provided at the lower end of the second sealing strip along the length direction of the second sealing strip. Two protrusions are provided, and there is a distance between the two protrusions. A limit screw is provided on the upper locking seat, which enables the upper lock head to slide only axially. A limit screw is provided on the lower locking seat, which also enables the upper lock head to slide only axially.

[0019] Analysis reveals that this invention discloses a thresholdless protective door locking device. The protective door adopts a thresholdless and trenchless design, with the opening and closing processes of the flip-sealing mechanism and the locking mechanism linked, eliminating the need for separate personnel operation and enabling barrier-free passage for vehicles and personnel. The flip-sealing mechanism seals the gap between the door leaf and the bottom of the door frame when the door leaf is closed, preventing shock waves and toxic gases from entering the tunnel, thus protecting people's lives and property during wartime. The linkage between the flip-sealing mechanism and the locking mechanism combines the raising and lowering of the flip-sealing beam with the locking action of the door leaf, achieving synchronous operation, thereby simplifying the structure, saving space, and shortening operation time. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0021] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A schematic diagram of the AA-direction structure.

[0023] Figure 3 This is a schematic diagram of the left-side structure of a door in the open state according to an embodiment of the present invention.

[0024] Figure 4 for Figure 2 A magnified structural diagram at point B.

[0025] Figure 5 This is a schematic diagram of another embodiment of the present invention.

[0026] Explanation of reference numerals in the attached diagram: 1. Door leaf; 2. Handwheel; 3. Worm gear reducer; 4. Reducer output shaft; 5. Lateral connecting rod; 6. Reversing linkage; 7. Spiral bevel gear commutator; 8. Upper output shaft of commutator; 9. Mounting seat; 10. Upper output shaft sleeve; 11. Upper shaft sleeve seat; 12. Upper lead screw; 13. Upper connecting rod; 14. Upper lifting connecting rod; 15. Upper lock head; 16. Upper locking seat; 17. Lower output shaft of commutator; 18. Lower output shaft sleeve; 19. Lower shaft sleeve seat; 20. Lower lead screw; 21. Sliding connection support; 22. Sliding connection arm; 23. Sliding rod; 24. Long oval hole; 25. Lower lifting connecting rod; 26. Lower locking seat; 27. Lower lock head; 28. Adjusting connecting rod; 29. ​​Tilting support; 30. Tilting sealing beam; 31. First sealing strip; 32. Second sealing strip; 33. Limit screw; 34. Raised strip. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0028] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] The accompanying drawings illustrate one or more examples of the invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the invention. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0030] like Figures 1 to 5 As shown, according to an embodiment of the present invention, a thresholdless security door locking device is provided. The security door includes a door frame and a door leaf 1, the door leaf 1 and the door frame are connected, and the locking device is disposed on the inner side wall of the door leaf 1, as shown. Figure 1 As shown, the locking device includes: a locking mechanism connected to door leaf 1, which secures door leaf 1 to the door frame after it is closed; and a flip-sealing mechanism located at the bottom of door leaf 1 and connected to the locking mechanism. Driven by the locking mechanism, the flip-sealing mechanism seals the gap between the bottom of door leaf 1 and the bottom of the door frame. This protective door locking device, through the linkage between the flip-sealing mechanism and the locking mechanism, features strong driving capability, compact structure, and convenient maintenance. This locking device is suitable for threshold-free protective doors. The opening and closing processes of the flip-sealing mechanism and the locking mechanism are linked, eliminating the need for separate personnel operation and enabling unimpeded passage for vehicles and personnel. The flip-sealing mechanism seals the gap between door leaf 1 and the bottom of the door frame when door leaf 1 is closed, preventing shock waves and toxic gases from entering the tunnel and ensuring the safety of people's lives and property during wartime.

[0031] Furthermore, the locking mechanism includes a handwheel 2, a worm gear reducer 3, a transmission assembly, an upper locking assembly, and a lower locking assembly. The worm gear reducer 3 is located in the middle of the door leaf 1. The handwheel 2 is connected to the worm gear reducer 3, and rotating the handwheel 2 drives the worm gear reducer 3 to rotate. There are two transmission assemblies, which are symmetrically installed on the left and right sides of the worm gear reducer 3. The worm gear reducer 3 has two reducer output shafts 4, and each reducer output shaft 4 is connected to one transmission assembly. The upper locking assembly includes an upper lock head 15 and an upper lock seat 16. The upper locking seat 16 is fixed on the door leaf 1, and the upper locking head 15 is set inside the upper locking seat 16. The upper locking head 15 can slide up and down inside the upper locking seat 16. The lower locking assembly includes a lower locking head 27 and a lower locking seat 26. The lower locking seat 26 is fixed on the door leaf 1, and the lower locking head 27 is set inside the lower locking seat 26. The lower locking head 27 can slide up and down inside the lower locking seat 26. The upper locking assembly and the lower locking assembly are connected to the transmission assembly. The worm gear reducer 3 can push the upper locking head 15 and the lower locking head 27 into the lock holes of the door frame respectively through the transmission assembly.

[0032] Furthermore, the transmission assembly includes a transverse connecting rod 5, a spiral bevel gear commutator 7, an upper lead screw 12, an upper connecting rod 13, and an upper output shaft sleeve 10. The spiral bevel gear commutator 7 is mounted on the door leaf 1 via a mounting base 9. The transverse connecting rod 5 is arranged laterally, with one end connected to the reducer output shaft 4, and the other end connected to the spiral bevel gear commutator 7 via a commutator connecting rod 6. The mounting base 9 is arranged vertically, and an upper shaft sleeve seat 11 is provided at the upper end of the mounting base 9. The device 7 has a commutator upper output shaft 8, the lower end of the upper output shaft sleeve 10 is sleeved on the commutator upper output shaft 8, the upper end of the upper output shaft sleeve 10 is located inside the upper shaft sleeve seat 11, the upper end of the upper output shaft sleeve 10 is provided with an internal trapezoidal thread, the lower end of the upper lead screw 12 is provided with an external trapezoidal thread, the lower end of the upper lead screw 12 is threadedly connected to the end of the upper output shaft sleeve 10, the upper end of the upper lead screw 12 is connected to the lower end of the upper connecting rod 13, and the commutator connecting rod 6 and the transverse connecting rod 5 are connected by a pin.

[0033] Furthermore, such as Figure 1 As shown, in one embodiment of the present invention, an upper lifting link 14 is further included. The upper lifting link 14 is horizontally arranged on the upper part of the door leaf 1. One end of the upper lifting link 14 is connected to the upper end of the upper link 13 of a transmission component, and the other end of the upper lifting link 14 is connected to the upper end of the upper link 13 of another transmission component. Four upper locking components are provided, arranged sequentially along the width direction of the door leaf 1. Two upper locking components are symmetrically installed near the edges of both sides of the door leaf 1, and the other two upper locking components are symmetrically installed in the middle of the door leaf 1. The lower ends of the upper locking heads 15 of the four upper locking components are all connected to the upper lifting link 14. This embodiment, by increasing the number of upper locking components and using the upper lifting link 14 to connect the upper locking components to the transmission components, enables the locking device to be suitable for large threshold-free security doors.

[0034] Furthermore, such as Figure 5 As shown, in another embodiment of the present invention, two upper locking assemblies are provided. The lower end of the upper locking head 15 of one upper locking assembly is connected to the upper end of the upper connecting rod 13 of one transmission assembly, and the lower end of the upper locking head 15 of the other upper locking assembly is connected to the upper end of the upper connecting rod 13 of another transmission assembly. The upper connecting rod 13 can push the upper end of the upper locking head 15 to extend out from the upper locking seat 16. The locking device in this embodiment is suitable for small threshold-free security doors.

[0035] Furthermore, the transmission assembly also includes a lower lead screw 20, a sliding connection support 21, and a sliding connection arm 22. The helical bevel gear commutator 7 has a lower output shaft 17. A lower shaft sleeve 19 is provided at the lower end of the mounting base 9. The upper end of a lower output shaft sleeve 18 is sleeved on the lower output shaft 17. The lower end of the lower output shaft sleeve 18 is located inside the lower shaft sleeve 19. The lower end of the lower output shaft sleeve 18 is provided with an internal trapezoidal thread. The upper end of the lower lead screw 20 is provided with an external trapezoidal thread. The upper end of the lower lead screw 20 is threadedly connected to the lower end of the lower output shaft sleeve 18, and the lower end of the lower lead screw 20 is connected to the sliding connecting arm 22. The sliding connecting support 21 is set on the door leaf 1. A sliding rod 23 is set on the sliding connecting support 21, and an elongated hole 24 is vertically set on the sliding connecting arm 22. The sliding rod 23 is located in the elongated hole 24. The sliding rod 23 and the elongated hole 24 cooperate to allow the sliding connecting arm 22 to slide on the sliding connecting support 21. There are two sliding rods 23 on the sliding connecting support 21, and two elongated holes 24 are vertically set on the sliding connecting arm 22. Each sliding rod 23 corresponds to one elongated hole 24.

[0036] Furthermore, it also includes a lower lifting link 25, which is horizontally arranged at the lower part of the door leaf 1. There are four lower locking components, which are arranged sequentially along the width direction of the door leaf 1. Two lower locking components are symmetrically installed at the edge positions near both sides of the door leaf 1, and the other two lower locking components are symmetrically installed in the middle of the door leaf 1.

[0037] Furthermore, such as Figure 2 and Figure 3 As shown, the flip-sealing mechanism includes a flip-sealing assembly and a flip-sealing beam 30. The flip-sealing beam 30 is horizontally arranged at the bottom of the door leaf 1. The upper end of the flip-sealing assembly is connected to the lower lifting link 25, and the lower end of the flip-sealing assembly is connected to the flip-sealing beam 30. During the lifting and lowering process, the lower lifting link 25 drives the flip-sealing beam 30 to flip through the flip-sealing assembly. The flip-sealing beam 30 achieves the sealing between the door leaf 1 and the ground by flipping. A flip-sealing assembly is provided between two adjacent lower locking assemblies.

[0038] The flip-sealing assembly includes an adjusting rod 28 and a flip support 29. The upper end of the adjusting rod 28 is hinged to the lower lifting rod 25. The upper end of the flip-sealing beam 30 is hinged to the lower end of the flip support 29. The lower end of the adjusting rod 28 is hinged to the middle of the flip-sealing beam 30. A first groove is provided on the side of the flip-sealing beam 30 near the door leaf 1. The upper inner wall of the first groove is inclined. The opening width of the first groove is smaller than the bottom width. A first sealing strip 31 is provided in the first groove. The first sealing strip 31 can seal between the flip-sealing beam 30 and the door leaf 1. A second groove is provided at the bottom of the flip-sealing beam 30. The second groove is inclined near the inner wall of the door leaf. The opening width of the second groove is smaller than the bottom width. A second sealing strip 32 is provided in the second groove. The second sealing strip 32 can seal between the flip-sealing beam 30 and the bottom of the door frame. Figure 4 As shown, a protrusion 34 is provided at the lower end of the second sealing strip 32 along its length. Two protrusions 34 are provided, with a distance between them. The second sealing strip 32 and the protrusions 34 are an integral structure. This arrangement allows the second sealing strip 32 to compress the two protrusions 34 when in contact with the ground, improving the sealing effect between the door leaf 1 and the bottom of the door frame through deformation of the protrusions 34. The flip-sealing mechanism is linked to the locking mechanism. During the closing process of the locking mechanism, the bottom of the door leaf 1 is sealed to the bottom of the door frame without the need for separate operation, ensuring unobstructed passage for vehicles and personnel.

[0039] A limiting screw 33 is provided on the upper locking seat 16, which enables the upper locking head 15 to slide only along the axial direction. A limiting screw 33 is provided on the lower locking seat 26, which enables the upper locking head 15 to slide only along the axial direction.

[0040] The working process of the locking device is as follows.

[0041] When closing the door, push the door leaf 1 to close. After the door leaf 1 is closed, turn the handwheel 2 to drive the worm gear reducer 3 to rotate. The reducer output shaft 4 of the worm gear reducer 3 drives the spiral bevel gear commutator 7 to rotate through the transverse connecting rod 5. The upper output shaft 8 of the commutator of the spiral bevel gear commutator 7 drives the upper output shaft sleeve 10 to rotate, thereby causing the upper lead screw 12 to rise axially. The upper lead screw 12 pushes the upper lock head 15 to extend from the upper locking seat 16 and insert into the lock hole at the corresponding position of the door frame through the upper lifting connecting rod 14. At the same time, the lower output shaft 17 of the commutator of the spiral bevel gear commutator 7 drives the lower output shaft sleeve 18 to rotate, thereby causing the lower lead screw 20 to descend axially. The lower lead screw 20 pushes the lower lock head 27 to extend from the lower locking seat 26 and insert into the lock hole at the corresponding position of the door frame through the lower lifting connecting rod 25, so that the door leaf 1 and the door frame fit together and meet the airtight function requirements.

[0042] When door leaf 1 is in the open state, the flip sealing beam 30 is in a horizontal state. At this time, the first sealing strip 31 of the flip sealing beam 30 faces the ground and the second sealing strip 32 faces the outside of door leaf 1. When the locking mechanism locks door leaf 1, the worm gear reducer 3 drives the lower lifting link 25 to descend. At the same time as the lower lock head 27 is inserted into the lock hole, the lower lifting link 25 pushes the flip sealing beam 30 to flip around the connection point of the flip sealing beam 30 and the flip support 29 through the adjusting link 28. When the flip sealing beam 30 flips 90°, the first sealing strip 31 contacts door leaf 1, realizing the seal between door leaf 1 and flip sealing beam 30. The second sealing strip 32 contacts the bottom of the door frame, realizing the seal between door leaf 1 and the bottom of the door frame.

[0043] When opening the door, turn the handwheel 2 in the opposite direction to unlock the locking mechanism, and at the same time flip the sealing beam 30 upward to a horizontal position. Then, pull the door leaf to open the door.

[0044] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0045] A thresholdless protective door locking device is disclosed. The opening and closing processes of the flip-sealing mechanism and the locking mechanism of this device are linked, eliminating the need for separate personnel operation. This locking device is suitable for thresholdless protective doors, enabling unimpeded passage for vehicles and personnel. The flip-sealing mechanism seals the gap between door leaf 1 and the bottom of the door frame when door leaf 1 is closed, preventing shock waves and toxic gases from entering the tunnel, thus protecting people's lives and property during wartime. By linking the flip-sealing mechanism with the locking mechanism, the raising and lowering of the flip-sealing beam and the locking action of the door leaf are integrated into one, achieving synchronous operation, thereby simplifying the structure, saving space, and shortening operation time.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A thresholdless security door locking device, the security door comprising a door frame and a door leaf, the door leaf and the door frame being connected, the locking device being disposed on the inner side wall of the door leaf, characterized in that, The locking device includes: A locking mechanism is connected to the door leaf, and after the door leaf is closed, the locking mechanism can fix the door leaf to the door frame; A flip-sealing mechanism is provided at the bottom of the door leaf and is connected to the locking mechanism. Driven by the locking mechanism, the flip-sealing mechanism can seal the gap between the bottom of the door leaf and the bottom of the door frame.

2. The thresholdless protective door locking device according to claim 1, characterized in that, The locking mechanism includes a handwheel, a worm gear reducer, a transmission assembly, an upper locking assembly, and a lower locking assembly. The worm gear reducer is located in the middle of the door leaf, and the handwheel is connected to the worm gear reducer. Rotating the handwheel drives the worm gear reducer to rotate. Two transmission assemblies are provided, symmetrically mounted on the left and right sides of the worm gear reducer. The worm gear reducer has two output shafts, each of which is connected to one of the transmission assemblies. The upper locking assembly includes an upper locking head and an upper locking seat. The upper locking seat is fixed to the door leaf, and the upper locking head is disposed within the upper locking seat, allowing the upper locking head to slide up and down within the upper locking seat. The lower locking assembly includes a lower lock head and a lower lock seat. The lower lock seat is fixedly mounted on the door leaf, and the lower lock head is disposed within the lower lock seat, allowing the lower lock head to slide up and down within the lower lock seat. Both the upper locking assembly and the lower locking assembly are connected to the transmission assembly, and the worm gear reducer can push the upper lock head and the lower lock head to be inserted into the lock hole of the door frame respectively through the transmission assembly.

3. The thresholdless protective door locking device according to claim 2, characterized in that, The transmission assembly includes a transverse connecting rod, a spiral bevel gear commutator, an upper lead screw, an upper connecting rod, and an upper output shaft sleeve. The spiral bevel gear commutator is mounted on the door leaf via a mounting bracket. The transverse connecting rod is arranged laterally, with one end connected to the output shaft of the reducer and the other end connected to the helical bevel gear commutator via a commutator connecting rod. The mounting base is arranged vertically, and an upper shaft sleeve is provided at the upper end of the mounting base. The spiral bevel gear commutator has an output shaft on the commutator. The lower end of the upper output shaft sleeve is fitted onto the upper output shaft of the commutator. The upper end of the upper output shaft sleeve is located inside the upper shaft sleeve seat. The upper output shaft sleeve has an internal trapezoidal thread at its upper end, and the upper lead screw has an external trapezoidal thread at its lower end. The lower end of the upper lead screw is threadedly connected to the end of the upper output shaft sleeve, and the upper end of the upper lead screw is connected to the lower end of the upper connecting rod. The commutator link and the transverse link are connected by a pin.

4. The thresholdless protective door locking device according to claim 3, characterized in that, The upper locking assembly is provided in two parts. The lower end of the upper locking head of one upper locking assembly is connected to the upper end of the upper connecting rod of one transmission assembly, and the lower end of the upper locking head of the other upper locking assembly is connected to the upper end of the upper connecting rod of the other transmission assembly. The upper connecting rod can push the upper end of the upper locking head to extend out from the upper locking seat.

5. The thresholdless protective door locking device according to claim 3, characterized in that, It also includes an upper lifting link, which is horizontally arranged on the upper part of the door leaf. One end of the upper lifting link is connected to the upper end of the upper link of one of the transmission components, and the other end of the upper lifting link is connected to the upper end of the upper link of another transmission component. The upper locking assembly is provided with four components, which are arranged sequentially along the width direction of the door leaf. Two upper locking assemblies are symmetrically installed near the edges of the door leaf on both sides, and the other two upper locking assemblies are symmetrically installed in the middle of the door leaf. The lower ends of the upper locking heads of the four upper locking assemblies are all connected to the upper lifting linkage.

6. The thresholdless protective door locking device according to claim 3, characterized in that, The transmission assembly further includes a lower lead screw, a sliding connection support, and a sliding connection arm. The helical bevel gear commutator has a lower output shaft. A lower shaft sleeve is provided at the lower end of the mounting base, and the upper end of the lower output shaft sleeve is fitted onto the lower output shaft of the commutator. The lower end of the lower output shaft sleeve is located inside the lower shaft sleeve seat. The lower output shaft sleeve has an internal trapezoidal thread at its lower end, and the lower lead screw has an external trapezoidal thread at its upper end. The upper end of the lower lead screw is threadedly connected to the lower end of the lower output shaft sleeve. The lower end of the lower lead screw is connected to the sliding connecting arm. The sliding connecting support is set on the door leaf. A sliding rod is set on the sliding connecting support. An elongated hole is vertically set on the sliding connecting arm. The sliding rod is located in the elongated hole. The sliding rod and the elongated hole cooperate to allow the sliding connecting arm to slide on the sliding connecting support.

7. The thresholdless protective door locking device according to claim 2, characterized in that, It also includes a lower lifting link, which is laterally arranged at the lower part of the door leaf. The lower locking assembly is provided in four parts, which are arranged sequentially along the width direction of the door leaf. Two of the lower locking assemblies are symmetrically installed near the edges of the door leaf on both sides, and the other two are symmetrically installed in the middle of the door leaf.

8. The thresholdless protective door locking device according to claim 7, characterized in that, The flip-sealing mechanism includes a flip-sealing assembly and a flip-sealing beam. The flip-up sealing beam is horizontally positioned at the bottom of the door leaf. The upper end of the flip-up sealing assembly is connected to the lower lifting linkage, and the lower end of the flip-up sealing assembly is connected to the flip-up sealing beam. During the lifting and lowering process, the lower lifting linkage drives the flip-up sealing beam to flip through the flip-up sealing assembly. The flip-up sealing beam achieves a seal between the door leaf and the ground by flipping. A flip-sealing assembly is provided between two adjacent lower locking assemblies.

9. The thresholdless protective door locking device according to claim 7, characterized in that, The tilting sealing assembly includes an adjusting link and a tilting support. The upper end of the adjusting link is hinged to the lower lifting link, the upper end of the tilting sealing beam is hinged to the lower end of the tilting support, and the lower end of the adjusting link is hinged to the middle of the tilting sealing beam. The flip-up sealing beam has a first groove on one side near the door leaf. The upper inner wall of the first groove is inclined. The opening width of the first groove is smaller than the bottom width. A first sealing strip is provided inside the first groove, which can seal the space between the flip-up sealing beam and the door leaf. The bottom of the flip-up sealing beam is provided with a second groove, which is inclined near the inner side wall of the door leaf. The opening width of the second groove is smaller than the bottom width of the groove. A second sealing strip is provided in the second groove, which can seal the space between the flip-up sealing beam and the bottom of the door frame.

10. The thresholdless protective door locking device according to claim 9, characterized in that, The lower end of the second sealing strip has two raised strips along its length, with a distance between them. A limiting screw is provided on the upper locking seat, which ensures that the upper locking head can only slide axially. A limiting screw is provided on the lower locking seat, which enables the upper locking head to slide only axially.

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