A tower door protection device

Abstract

A tower protection device, including tower block, the inside of tower block's upper and lower left and right four directions are equipped with folding connecting rod device, folding connecting rod device is in straight state, tower is in lock state; folding connecting rod device is in curved state, tower is in unlocking state; folding connecting rod device is connected with push unlocking device and manual unlocking device that drive it between straight state and curved state switches respectively; push unlocking device includes a center rotating shaft, the center rotating shaft is installed with drive cross rotating frame and linkage cross rotating frame from inside to outside in turn, drive cross rotating frame is connected with electric push rod device that drives its rotation, the four ends of drive cross rotating frame are rotatably connected with corresponding folding connecting rod device, the four ends of linkage cross rotating frame are respectively provided with push block, the other end of push block is respectively with the clockwise rotation side of corresponding folding connecting rod device correspondingly set up push and bend it.

Description

Technical Field

[0001] This invention belongs to the field of tower technology, specifically relating to a tower door protection device. Background Technology

[0002] A single-tube tower, belonging to the field of tube tower technology, includes a tower body and a working platform connected to the upper part of the tower body. A lower doorway is opened in the bottom tube wall of the tower body, and an upper doorway is opened in the tube wall at the location of the working platform. The antenna support is fixed to the railing of the working platform. The tower body is characterized by a ladder connected to it, consisting of a main ladder rod and crossbars connected to the main ladder rod. The main ladder rod is fixedly connected to a support frame, and the support frame is screwed into a connecting bracket located on the inner wall of the tower body.

[0003] The tower doors at the bottom of existing single-tube towers are generally secured with external locks. Normally, they need to be unlocked manually with a key, which is not only time-consuming and laborious, but also makes it easy for criminals to forcibly break the locks and steal the tower doors, resulting in huge economic losses and security risks.

[0004] Existing patent CN213747698U discloses a four-point locking drying tower door, including a tower door body, a tower door connecting frame on the outer side of the tower door body, four fixed seats corresponding to the four positions on the tower door connecting frame, a limit seat on the upper side of the tower door body, an unlocking connecting rod inserted inside the limit seat, a mounting block fixedly connected to one end of the unlocking connecting rod, a notch on one side of the mounting block, a first support rod inside the mounting block, a second support rod rotatably connected to the other end of the first support rod, and a disc connected to the mounting block via a drive rod, the disc being rotatably connected to the drive rod via a fixed shaft. While this structure ensures the safety of the tower door, it is prone to operational errors, generates significant noise, and has unstable transmission. In the event of a lock malfunction, there is no emergency opening mechanism. Furthermore, this type of lock is generally located on the outside of the tower door and does not provide anti-theft protection. Summary of the Invention

[0005] To address the problems described in the background section, the present invention aims to provide a tower door protection device that can lock from the inside and enable remote control for automatic opening and closing of the door lock. In the event of a lock malfunction, it can also be mechanically unlocked using specialized tools, thus enhancing the lock's anti-theft performance.

[0006] The technical solution adopted in this invention is:

[0007] A tower gate protection device includes a tower gate block, characterized in that: folding linkage devices are installed on the inner side of the tower gate block in four directions (up, down, left, and right); when the folding linkage devices are in a straight state, the tower gate is in a locked state; when the folding linkage devices are in a bent state, the tower gate is in an unlocked state; the folding linkage devices are respectively connected to a push unlocking device and a manual unlocking device that drive the folding linkage devices to switch between the straight and bent states.

[0008] The push-to-unlock device includes a central rotating shaft fixed at the center of the inner side of the tower gate block. A drive cross-shaped rotating frame and a linkage cross-shaped rotating frame are rotatably mounted on the central rotating shaft from the inside out. The drive cross-shaped rotating frame is connected to an electric push rod device that drives its rotation. The four ends of the drive cross-shaped rotating frame are rotatably connected to corresponding folding linkage devices. The four ends of the linkage cross-shaped rotating frame are each equipped with a push block, the other end of which is respectively positioned to bend the clockwise rotating side of the corresponding folding linkage device. The linkage cross-shaped rotating frame is connected to a manual unlocking device that can pull it to rotate for emergency manual unlocking. This invention is located inside the tower body, making it difficult to damage from the outside, effectively reducing the occurrence of tower gate theft and possessing significant economic value. By incorporating an electric push-to-unlock device and an emergency manual unlocking device, it can address unlocking problems caused by power outages and other conditions, making the entire device safer and more reliable.

[0009] Furthermore, the manual unlocking device includes a rotating mechanism and a second ratchet device. The rotating mechanism includes a bearing seat fixedly connected to the inner side of the tower door. A half-threaded sleeve is fixedly connected inside the bearing seat. A single-rotor ratchet and a rotating winding disc are fixedly fixed on the half-threaded sleeve in sequence. A cam is rotatably connected to the outer end of the half-threaded sleeve. The rope wound on the rotating winding disc is connected to a linkage cross rotating frame that is pulled and rotated by it.

[0010] The tower gate has a first circular hole at the center of the bearing seat that communicates with the outside. A semi-circular locking block with symmetrical upper and lower dimensions is fixedly connected to the cam. A second circular hole larger than a semi-threaded sleeve is opened at the center of the two semi-circular locking blocks. A gap is left between the two semi-circular locking blocks. The second circular hole communicates with the first circular hole through the semi-threaded sleeve so that a special tool can be inserted to drive the rotating mechanism to rotate.

[0011] The second pawl of the second pawl device is rotatably connected to the tower block. The second pawl of the second pawl device engages with a single-turn ratchet to stop, and the second pawl is in contact with a cam that drives it away from the stop position. A second return spring is provided between the second pawl and the tower block for reset. The manual unlocking device of the present invention first locks the cam with a semi-threaded sleeve, thereby driving the cam to rotate a quarter turn to lift the second pawl, realizing the unlocking of the single-turn ratchet and the second pawl. After unlocking, the rotating winding disc is driven to rotate, thereby pulling the linkage cross rotating frame to rotate counterclockwise, realizing the manual unlocking of the door.

[0012] Furthermore, the manual unlocking device also includes a first pawl device, the first pawl of the first pawl device is rotatably connected to the tower block, the first pawl and the second pawl are arranged opposite to each other, the first pawl cooperates with a single-rotation ratchet to make the single-rotation ratchet rotate only once, and a first return spring is provided between the first pawl and the tower block.

[0013] Furthermore, the manual unlocking device is provided in one or more forms.

[0014] Furthermore, the folding linkage device includes a rotating linkage and a sliding linkage. The inner end of the rotating linkage is rotatably connected to the end of the driving cross rotating frame, and its outer end is hinged to the sliding linkage. A return spring is provided between the rotating linkage and the sliding linkage on the same side. The return spring and the push block are located on opposite sides of the folding linkage device. The rotatable connection position of the rotating linkage and the sliding linkage is limited by setting a limit or other means, so that the sliding linkage can only rotate clockwise relative to the rotating linkage. This ensures that when the entire mechanism is automatically opening and closing the lock, the folding linkage device is in its initial state, and the push block is located on the left side of the rotating linkage and in contact with the left end face of the rotating linkage. When manually unlocking, the linkage cross rotating frame rotates counterclockwise, causing the push block to push the rotating linkage counterclockwise, overcoming the resistance of the tension spring and friction to do work. The folding linkage device is in a bent state, thereby driving the sliding linkage to move towards the center of the tower door, ultimately unlocking the tower door.

[0015] Furthermore, a sliding limit block is provided at the outer end of the folding connecting rod device in the four directions of the inner side of the tower gate block, and the sliding connecting rod passes through the sliding limit block.

[0016] Furthermore, a push rod support is fixedly connected to the inner side of the tower block, and the electric push rod device is rotatably connected to the push rod support.

[0017] Furthermore, the electric actuator is communicatively connected to a remote controller or a manual remote controller.

[0018] Compared with the prior art, the significant advantages of this invention include:

[0019] 1. This invention features a manual unlocking mode, which can be unlocked using a special tool. The manual unlocking mode is purely mechanical and can handle unlocking problems caused by power outages or other conditions, making the entire device safer and more reliable.

[0020] 2. Since the invention is located inside the tower body, it is difficult to damage it from the outside, which effectively reduces the occurrence of tower door theft and has great economic value.

[0021] 3. The electric push rod device described in this invention can be equipped with a remote control device, thereby realizing remote control of the tower gate to unlock and lock, making maintenance more convenient and faster. Attached Figure Description

[0022] Figure 1 This is a plan view of the initial state of a tower gate protection device according to the present invention.

[0023] Figure 2 This is an overall schematic diagram of the initial state of a tower gate protection device according to the present invention.

[0024] Figure 3 This is a schematic diagram of the manual unlocking device in a tower gate protection device according to the present invention.

[0025] Figure 4 This is a schematic diagram of the overall push-unlocking device in a tower gate protection device of the present invention.

[0026] Figure 5 This is a schematic diagram of the tower gate protection device of the present invention after manual unlocking.

[0027] Figure 6 This is an overall schematic diagram of the folding linkage device in a tower gate protection device of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Reference Figure 1-6 This embodiment provides a tower gate protection device, including a tower gate block 1. Folding linkage devices 60 are installed on the four sides (up, down, left, and right) of the inner side of the tower gate block 1. When the folding linkage devices 60 are in the straight state, the tower gate is in the locked state; when the folding linkage devices 60 are in the bent state, the tower gate is in the unlocked state. The folding linkage devices 60 are respectively connected to a push unlocking device 10 and a manual unlocking device 90 that drive them to switch between the straight and bent states.

[0033] The push-unlocking device 10 described in this embodiment includes a central rotating shaft 20, which is fixed at the center of the inner side of the tower gate block 1. A drive cross rotating frame 40 and a linkage cross rotating frame 30 are rotatably mounted on the central rotating shaft 20 from the inside out. The drive cross rotating frame 40 is connected to an electric push rod device 80 that drives its rotation. A push rod support seat 81 is fixedly connected to the inner side of the tower gate block 1, and the electric push rod device 80 is rotatably connected to the push rod support seat 81. The electric push rod device 80 is communicatively connected to a remote controller or a manual remote controller. The four ends of the drive cross rotating frame 40 are rotatably connected to corresponding folding linkage devices 60. The four ends of the linkage cross rotating frame 30 are each provided with a push block 31, and the other end of each push block 31 is respectively configured to bend the corresponding clockwise rotating side of the folding linkage device 60. The linkage cross rotating frame 30 is connected to a manual unlocking device 90 that can be pulled to rotate for manual unlocking in emergencies. Located inside the tower structure, this invention is difficult to damage from the outside, effectively reducing the occurrence of tower door theft and possessing significant economic value. By incorporating an electric unlocking mechanism and an emergency manual unlocking device, it can address unlocking issues caused by power outages or other conditions, making the entire device safer and more reliable.

[0034] Specifically, a driving cross-rotating frame 40 is rotatably connected to the front end of the central rotating shaft 20, and a linkage cross-rotating frame 30 is rotatably connected to the rear end of the central rotating shaft 20. A folding linkage device 60 is rotatably connected to each of the four ends (up, down, left, right) of the front end of the driving cross-rotating frame 40. A pushing block 31 is fixedly connected to each of the four positions (up, down, left, right) of the rear end of the linkage cross-rotating frame 30. The four pushing blocks 31 correspond to the four folding linkage devices 60, and the front ends of the pushing blocks 31 are located on the clockwise rotation side of the corresponding folding linkage device 60. A push rod support seat 81 is fixedly connected to the upper left corner of the inner side of the tower gate block 1. An electric push rod device 80 is rotatably connected to the rear end of the push rod support seat 81. The lower right end of the electric push rod device 80 is rotatably connected to the left side of the rear end face of the drive cross rotating frame 40. The electric push rod device 80 can drive the drive cross rotating frame 40 to rotate, thereby realizing the automatic opening and closing of the tower gate. After the manual unlocking device 90 is unlocked, the rotating mechanism 100 pulls the linkage cross rotating frame 30 to rotate counterclockwise. Under the action of the thrust, the folding linkage device 60 is in a bent state, thereby realizing manual unlocking.

[0035] In this embodiment, the manual unlocking device 90 is located at the upper left end of the inner side of the tower gate block 1. Multiple manual unlocking devices 90 can also be provided. The manual unlocking device 90 includes a rotating mechanism 100 and a second ratchet device 110. The rotating mechanism 100 includes a bearing seat 101 fixedly connected to the inner side of the tower gate. A semi-threaded sleeve 102 is fixedly connected inside the bearing seat 101. A single-rotation ratchet 103 and a rotating winding disc (not shown in the figure) are sequentially fixed on the semi-threaded sleeve 102. A cam 104 is rotatably connected to the outer end of the semi-threaded sleeve 102. The rope wound on the rotating winding disc and the cam 104 that is pulled and rotated by the cam 104... The linkage cross-rotating frame 30 is connected; the tower gate has a first circular hole at the center of the bearing seat 101 that communicates with the outside; a semi-circular locking block 105 with symmetrical upper and lower parts is fixedly connected to the cam 104; a second circular hole larger than the semi-threaded sleeve 102 is opened at the center of the two semi-circular locking blocks 105; a gap is left between the two semi-circular locking blocks 105; the second circular hole communicates with the first circular hole through the semi-threaded sleeve 102 and allows a special tool to pass through and drive the rotating mechanism 100 to rotate;

[0036] The second pawl 112 of the second pawl device 110 is rotatably connected to the tower block 1. The second pawl 112 of the second pawl device 110 engages with the single-turn ratchet 103 for stop. The second pawl 112 is in contact with the cam 104 that drives it away from the stop position. A second return spring is provided between the second pawl 112 and the tower block 1 for reset. The manual unlocking device of the present invention first locks the cam with the semi-threaded sleeve, thereby driving the cam to rotate a quarter turn to lift the second pawl, realizing the unlocking of the single-turn ratchet and the second pawl. After unlocking, the rotating winding disc is driven to rotate, thereby pulling the linkage cross rotating frame to rotate counterclockwise, realizing the manual unlocking of the door.

[0037] Specifically, the rotating mechanism 100 includes a bearing seat 101, which is fixedly connected to the inner side of the tower gate 1. The tower gate 1 has a circular hole at the center of the bearing seat 101 that communicates with the outside. A semi-threaded sleeve 102 is fixedly connected inside the bearing seat 101. A single-rotation ratchet 103 is fixedly fixed at the center of the semi-threaded sleeve 102. A rotating winding disc is provided at the rear end of the single-rotation ratchet 103. The center of the rotating winding disc is fixedly connected to the semi-threaded sleeve 102. A cam 104 is rotatably connected to the rear end of the semi-threaded sleeve 102. A pair of symmetrical semi-circular locking blocks 105 are fixedly connected at the center of the rear end face of the cam 104. A circular hole larger than the semi-threaded sleeve 102 is opened at the center of the two semi-circular locking blocks 105. A gap is left between the two semi-circular locking blocks 105. The second pawl device 110 is located at the upper right end of the cam 104. The second pawl device 110 includes a second pawl shaft 111. The front end of the second pawl shaft 110 is fixedly connected to the inner side of the tower gate 1. A second pawl 112 is rotatably connected to the rear end of the second pawl shaft 111. The lower left end of the second pawl 112 contacts the upper end of the cam 104. A second rotary spring is rotatably mounted at the axis of the second pawl shaft 111. The rear end of the second rotary spring is fixedly connected to the rear end face of the second pawl block 112, and the front end of the second rotary spring is fixedly connected to the inner side of the tower gate 1. A steel wire rope is fixedly connected to the upper end of the rotating winding reel, and the other end of the steel wire rope is fixedly connected to the right end of the linkage cross rotating frame 30.

[0038] The manual unlocking device 90 described in this embodiment also includes a first pawl device 120. The first pawl 121 of the first pawl device 120 is rotatably connected to the tower block 1. The first pawl 121 and the second pawl 112 are arranged opposite to each other. The first pawl 121 cooperates with the single-rotation ratchet 103 to make the single-rotation ratchet 103 rotate only once. A first return spring is provided between the first pawl 121 and the tower block 1 for resetting. Specifically, the first pawl device 120 is located at the upper left end of the single-rotation ratchet 103. The first pawl device 120 includes a first pawl shaft 122. The front end of the first pawl shaft 122 is fixedly connected to the inner side of the tower gate 1. The rear end of the first pawl shaft 122 is rotatably connected to a first pawl 121. The lower right end of the first pawl 121 is in contact with the upper end of the single-rotation ratchet 103. A first rotary spring is rotatably provided at the axis of the first pawl shaft 122. The rear end of the first rotary spring is fixedly connected to the rear end face of the first pawl block 121. The front end of the first rotary spring is fixedly connected to the inner side of the tower gate 1.

[0039] The folding linkage device 60 described in this embodiment includes a rotating linkage 62 and a sliding linkage 61. The inner end of the rotating linkage 62 is rotatably connected to the end of the driving cross rotating frame 40, and its outer end is hinged to the sliding linkage 61. A return spring is provided between the rotating linkage 62 and the sliding linkage 61 on the same side. The return spring and the pushing block 31 are located on both sides of the folding linkage device 60. A sliding limiting block 2 is provided at the four positions (up, down, left, right) on the inner side of the tower gate block 1, corresponding to the outer end of the folding linkage device 60. The sliding linkage 61 passes through the sliding limiting block 2. Specifically, the upper end of the rotating connecting rod 62 is rotatably connected to the lower end of the driving cross rotating frame 30, and the lower end of the rotating connecting rod 62 is rotatably connected to the upper end of the sliding connecting rod 61. The lower end of the sliding connecting rod 61 is located within the lower sliding limit block 2, and the sliding connecting rod 61 slides up and down within the lower sliding limit block 2. A first fixed point is provided on the lower side of the right end face of the rotating connecting rod 62, and a second fixed point is provided on the upper side of the right end face of the sliding connecting rod 61. The first fixed point and the second fixed point are connected together by a return spring. The rotatable connection position of the rotating connecting rod 62 and the sliding connecting rod 61 is determined by setting a limit or other means. This design ensures that the sliding link 61 can only rotate clockwise relative to the rotating link 62, guaranteeing that the folding link device 60 is in its initial state when the entire mechanism is automatically opening and closing the lock. The pushing block 31 is located to the left of the rotating link 62 and is in contact with the left end face of the rotating link 62. When manually unlocking, the linkage cross rotating frame 30 rotates counterclockwise, causing the pushing block 31 to push the rotating link 62 counterclockwise, overcoming the resistance of the tension spring and friction. The folding link device 60 is in a bent state, thereby driving the sliding link 61 to move towards the center of the tower door, ultimately unlocking the tower door.

[0040] The working principle of this invention is as follows:

[0041] When maintenance or repair of the automatic unlocking mechanism is required, the electric push rod device 80 starts in the forward direction. Driven by the electric push rod, the drive cross-rotating frame 40 rotates counterclockwise. The drive cross-rotating frame 40 pulls the folding linkage device 60 inwards towards the tower door. Simultaneously, the push block 31 of the linkage cross-rotating frame 30 also pushes the folding linkage device 60 to fold, preventing it from locking with the tower body, thus allowing the tower door to open. After maintenance or repair, the tower door is closed first, and the electric push rod device 80 starts in the reverse direction. Driven by the electric push rod, the drive cross-rotating frame 40 rotates clockwise to reset. The drive cross-rotating frame 40 pushes the folding linkage device 60 outwards towards the tower door, thus relocking the tower door to the tower body. If the automatic unlocking device malfunctions and cannot start, a specialized unlocking tool is used. Insert the tool into the semi-threaded sleeve 102 until the top of the special tool is inside the semi-circular locking block 105, where it automatically locks. Then rotate a quarter turn, causing the cam 104 to rotate a quarter turn and lift the second pawl 112, thus unlocking the single-turn ratchet 103 from the second pawl block 112. After unlocking, unlock the tool top from the semi-circular locking block 105, then lock the special tool to the semi-threaded sleeve 102, causing the semi-threaded sleeve 102 to rotate clockwise, which in turn causes the rotating winding disc to rotate clockwise. This causes the linkage cross rotating frame 30 to rotate counterclockwise through the wire rope, and under the thrust, the sliding link 61 is in a bent state, which in turn causes the sliding link 61 to move towards the center of the tower door, ultimately unlocking the tower door and opening it. Finally, reset the cam to return the entire mechanism to its initial state.

[0042] This invention is applicable to the field of tower technology and can be used for the protection of various tower doors.

[0043] The entire tower gate device of this invention can be remotely controlled for automatic opening and closing. The tower gate protection devices are all located inside the tower body, making them difficult to damage from the outside, effectively reducing the occurrence of tower gate theft and having great economic value. The tower gate protection device is equipped with a manual unlocking mode, which can be unlocked with special tools. The manual unlocking mode adopts a purely mechanical method, which has good stability and can cope with various unlocking problems caused by power outages and other conditions, making the entire device safer and more reliable.

Claims

1. A portal protection device comprising a portal block, characterised in that: Folding linkage devices are installed on the inner side of the tower gate block in four directions: up, down, left, and right. When the folding linkage device is in the straight state, the tower gate is in the locked state; when the folding linkage device is in the bent state, the tower gate is in the unlocked state. The folding linkage device is connected to a push unlocking device and a manual unlocking device that drive it to switch between the straight and bent states. The push-unlocking device includes a central rotating shaft, which is fixed at the center of the inner side of the tower gate block. A drive cross rotating frame and a linkage cross rotating frame are rotatably mounted on the central rotating shaft from the inside out. The drive cross rotating frame is connected to an electric push rod device that drives its rotation. The four ends of the drive cross rotating frame are rotatably connected to corresponding folding linkage devices. The four ends of the linkage cross rotating frame are each provided with a push block, the other end of which is respectively configured to bend the corresponding clockwise rotating side of the folding linkage device. The linkage cross rotating frame is connected to a manual unlocking device that can pull it to rotate for manual unlocking in emergencies. The manual unlocking device includes a rotating mechanism and a second pawl device. The rotating mechanism includes a bearing seat fixedly connected to the inner side of the tower gate. A half-threaded sleeve is fixedly connected inside the bearing seat. A single-rotation ratchet and a rotating winding disc are fixed sequentially on the half-threaded sleeve. A cam is rotatably connected to the outer end of the half-threaded sleeve. The rope wound on the rotating winding disc is connected to a linkage cross rotating frame that is pulled and rotated by the ratchet. The manual unlocking device also includes a first pawl device. The first pawl of the first pawl device is rotatably connected to the tower gate block. The first pawl and the second pawl are arranged opposite to each other. The first pawl cooperates with the single-rotation ratchet to make the single-rotation ratchet rotate only once. A first return spring is provided between the first pawl and the tower gate block. The tower gate has a first circular hole at the center of the bearing seat that communicates with the outside. The cam is fixedly connected with symmetrical semi-circular locking blocks. A second circular hole larger than a semi-threaded sleeve is opened at the center of the two semi-circular locking blocks. A gap is left between the two semi-circular locking blocks. The second circular hole is connected to the first circular hole through the semi-threaded sleeve so that a special tool can be inserted to drive the rotating mechanism to rotate. The second pawl of the second pawl device is rotatably connected to the tower block. The second pawl of the second pawl device is engaged with a single-rotation ratchet to stop. The second pawl is in contact with a cam that drives it away from the stop position. A second rotary spring for reset is provided between the second pawl and the tower block. The manual unlocking device first locks the cam with a semi-threaded sleeve, thereby driving the cam to rotate a quarter turn and lift the second pawl, realizing the single-turn ratchet unlocking the second pawl. After unlocking, it drives the rotating winding disc to rotate, thereby pulling the linkage cross rotating frame to rotate counterclockwise, realizing the manual unlocking of the door.

2. A portal protection device according to claim 1, characterised in that: One or more manual unlocking devices are provided.

3. A tower protection device according to claim 1 or 2, characterised in that: The folding linkage device includes a rotating linkage and a sliding linkage. The inner end of the rotating linkage is rotatably connected to the end of the driving cross rotating frame, and its outer end is hinged to the sliding linkage. A return spring is provided between the rotating linkage and the sliding linkage on the same side. The return spring and the push block are located on both sides of the folding linkage device.

4. A portal protection device according to claim 3, characterised in that: A sliding limit block is provided at the outer end of the folding connecting rod device in the four directions of the inner side of the tower gate block, and the sliding connecting rod passes through the sliding limit block.

5. A portal protection device according to claim 1, characterized in that: A push rod support is fixedly connected to the inner side of the tower block, and the electric push rod device is rotatably connected to the push rod support.

6. A portal protection device according to claim 1, characterized in that: The electric actuator is connected to a remote controller or a manual remote controller.

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