A detection and early warning device for container F-TR lock hook connection

Abstract

The utility model relates to container F -TR lock hook connects early warning technical field, and disclose a kind of detection early warning device of container F -TR lock hook connection, including container body and portal spreader, by setting pressure sensor in corner groove middle part, the pressure change of protruding position on upper end of spin lock is detected in real time, in combination with the gravity pressure threshold value (matching container deadweight and loading weight) of control terminal preset, abnormal state in hoisting process can be accurately judged: when pressure value is below threshold value and with spin lock locking angle signal contradiction, it is judged that there is unhooking risk;When pressure value is abnormally high and spin lock does not reach complete unlocking angle, it is judged that there is F-TR lock hook connection residue, make up the defect that traditional detection cannot quantitatively judge four-corner contact state, realize the pertinence early warning of "hook connection residue drives table part to lift" "partial unhooking" and the like risk.

Description

Technical Field

[0001] This utility model relates to the field of container F-TR lock linkage early warning technology, and in particular to a detection and early warning device for container F-TR lock linkage. Background Technology

[0002] In container transportation, the F-TR lock is a key component for achieving a rigid connection between the container and the transport vehicle (such as a semi-trailer or skeleton truck), and its performance directly affects transportation safety. The F-TR lock mainly consists of a lock body, a rotary lock, a rotating shaft, an operating handle, and a limiting mechanism. The lock body is fixed to the load-bearing surface of the transport vehicle (such as the chassis beam) and has an internal cavity to accommodate the rotary lock and rotating shaft. The rotary lock is columnar or hook-shaped, with its head designed in an "L" or "T" shape to fit the inner cavity of the container corner fittings. It can rotate around the rotating shaft to switch between "locked" and "open" states. The rotating shaft connects the rotary lock and the operating handle, transmitting mechanical force to drive the rotary lock to rotate (typically with a locking angle of 90° and an opening angle of 0°). The operating handle allows operators to manually or semi-automatically drive the rotary lock to rotate. Some models are equipped with a spring return device to ensure the stability of the rotary lock position. To ensure the safety of container transportation, the engagement status of the F-TR lock needs to be monitored in real time.

[0003] During container hoisting and transportation, traditional inspection methods struggle to comprehensively and accurately monitor the contact status between the four corners of the container's bottom and the transport platform. Factors such as road bumps, hoisting angle deviations, and uneven cargo loading often cause variations in the contact force between the container's four corners and the transport platform. Some corners may remain connected due to incomplete unlocking of the F-TR lock. During container hoisting, an incompletely unlocked F-TR lock can cause the corresponding corner to remain unexpectedly connected to the transport platform, leading to the container being lifted along with related components of the transport platform, resulting in an imbalance of force on the equipment. This can potentially cause deformation of the transport platform, damage to the locks, or tilting of the container. Furthermore, traditional inspection methods rely on manual checks or mechanical trigger signals at a single location, which cannot cover the contact status of all corners or quantify the risk level corresponding to abnormal pressure. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a detection and early warning device for container F-TR lock engagement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a detection and early warning device for F-TR lock hooking of a container, comprising a container body and a gantry crane, wherein corner grooves are provided at the four corners of the bottom of the gantry crane, and a rotary lock is provided inside each corner groove. The rotary lock passes through the corner groove and extends to the outer side of the bottom of the gantry crane. An embedded groove is provided at the upper end of the rotary lock, and a permanent magnet ring is embedded in the embedded groove. A pressure sensor is provided in the middle of the corner groove, and the pressure sensor is located at the upper end of the rotary lock and contacts its upper protruding part.

[0006] An angle sensor is fixedly installed at the upper end of the corner groove by screws. The sensing end of the angle sensor is vertically downward and corresponds to the upper end face of the permanent magnet ring, with a preset gap of 0.5mm-3mm between them. An operating handle is fixedly installed at the upper end of the rotary lock. An L-shaped limiting groove is opened in the middle of the corner groove. The operating handle passes through the L-shaped limiting groove and can move along the groove. Control terminals are fixedly installed on both sides of the gantry crane. Two conductive springs are fixedly installed at both ends of the L-shaped limiting groove.

[0007] Preferably, the pressure sensor is electrically connected to the control terminal via a wire. The bottom of the container body is provided with a base, and four F-TR locks are installed on the upper end of the base. The base is connected to the bottom of the container body via the F-TR locks. The inner side of each conductive spring is provided with an arc-shaped groove. The middle of the operating handle is provided with a connecting groove, and arc-shaped contact pieces are fixedly installed at both the upper and lower ends of the inner side of the connecting groove.

[0008] Preferably, the arc-shaped contact piece is adapted to the arc-shaped groove, the control terminal outputs positive and negative voltages, the conductive spring is electrically connected to the positive output terminal of the control terminal through a wire, and the arc-shaped contact piece is electrically connected to the negative output terminal of the control terminal through a wire.

[0009] Preferably, the upper and lower ends of both sides of the connecting groove are chamfered, a bearing is embedded in the bottom of the corner groove, the bottom of the rotary lock is rotatably located inside the bearing, and a sealing ring is provided at the bottom of the bearing. The sealing ring is located at the through connection between the bottom of the rotary lock and the gantry crane.

[0010] Preferably, each of the multiple corner slots is fixedly equipped with a buzzer alarm, the multiple buzzer alarms are electrically connected to the angle sensors, and the multiple angle sensors are electrically connected to the control terminal.

[0011] Preferably, the angle sensor is a magnetoelectric sensor with a detection accuracy of not less than ±0.5° and an operating temperature range of -40°C to 85°C.

[0012] Preferably, the permanent magnet ring is a radially magnetized neodymium iron boron magnet ring, the outer diameter of which is adapted to the inner diameter of the embedding groove, and the thickness of the permanent magnet ring is 3mm-5mm.

[0013] Preferably, the arc-shaped contact piece is made of brass and has a gold-plated surface, and the conductive spring is an elastic structure with a pre-compressed spring, with a contact pressure of 5N-10N when the two come into contact.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. By installing a pressure sensor in the middle of the corner groove, the pressure change of the protruding part at the upper end of the swivel lock is detected in real time. Combined with the gravity pressure threshold preset by the control terminal (matching the container's self-weight and loading weight), abnormal states during the lifting process can be accurately judged: when the pressure value is lower than the threshold and contradicts the swivel lock locking angle signal, it is determined that there is a risk of disengagement; when the pressure value is abnormally high and the swivel lock has not reached the fully unlocking angle, it is determined that there is F-TR lock hook residue. This makes up for the deficiency of traditional detection that cannot quantify the contact state of the four corners, and realizes targeted early warning of risks such as "hook residue causing the platform components to be lifted" and "partial disengagement".

[0016] 2. By setting an angle sensor in conjunction with a permanent magnet ring, and combining the contact between a conductive spring and an arc-shaped contact piece, a dual detection mechanism is formed. When the rotary lock rotates, it drives the permanent magnet ring to rotate synchronously. The angle sensor detects its rotation angle in real time to obtain the actual angle of the rotary lock. When the rotary lock is turned to the locked or unlocked position, the arc-shaped contact piece on the operating handle contacts the conductive spring piece at the end of the L-shaped limit groove, forming a closed loop and sending an electrical signal to the control terminal. This effectively avoids the misjudgment caused by environmental interference of traditional single pressure sensors. The angle sensor directly reflects the mechanical position of the rotary lock, and the contact signal verifies the actual position. The two mutually verify each other to ensure accurate detection of the F-TR lock's engagement status and avoid safety hazards caused by false locking or excessive compression.

[0017] 3. Each of the four corner slots is equipped with an independent pressure sensor, angle sensor, and buzzer alarm. When any corner experiences abnormal pressure or a malfunction in the lock, the corresponding alarm will respond immediately, and the control terminal will simultaneously display the location and type of the abnormality. This design overcomes the limitations of traditional manual inspection or single-location monitoring, achieving "early warning for any abnormality," preventing overall safety accidents caused by undetected local connections or separations, and improving the timeliness and targeted nature of risk management.

[0018] 4. By setting an arc-shaped groove and an arc-shaped contact piece, when the rotary lock is rotated to the locked or unlocked position, the arc-shaped contact piece can be accurately embedded in the arc-shaped groove. Its curved surface fit can form a circumferential limit on the operating handle, effectively buffering the slight shaking of the rotary lock caused by vibration. This reduces signal fluctuations caused by poor contact between the arc-shaped contact piece and the conductive spring or circuit interruption due to the shaking of the rotary lock, avoids misjudgment of angle deviation that may occur due to mechanical vibration, and improves the reliability of judging the lock engagement status. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the gantry crane structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the corner groove of this utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure at both ends of the rotary lock of this utility model;

[0023] Figure 5 This is a schematic diagram of the inner structure of the L-shaped limiting groove of this utility model;

[0024] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0025] Figure label:

[0026] 1. Container body; 101. Gantry crane; 102. Base; 103. F-TR locks;

[0027] 2. Angle groove; 201. Bearing; 202. Turnlock; 203. Sealing ring; 204. Pressure sensor;

[0028] 3. Embedded slot; 301. Permanent magnet ring; 302. Angle sensor; 303. Buzzer alarm;

[0029] 4. Control terminal;

[0030] 5. Operating handle; 501. L-shaped limit groove;

[0031] 6. Conductive spring; 601. Arc-shaped groove; 602. Connecting groove; 603. Arc-shaped contact piece; 604. Chamfer. Detailed Implementation

[0032] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0033] The specific embodiments of this utility model are described below with reference to the accompanying drawings:

[0034] Example: Reference Figures 1-6 A detection and early warning device for F-TR lock hooking of a container includes a container body 1 and a gantry crane 101. The bottom four corners of the gantry crane 101 are provided with corner grooves 2. Each corner groove 2 is provided with a rotary lock 202. The rotary lock 202 passes through the corner groove 2 and extends to the outer side of the bottom of the gantry crane 101. The upper end of the rotary lock 202 is provided with an embedding groove 3. A permanent magnet ring 301 is embedded in the embedding groove 3. A pressure sensor 204 is provided in the middle of the corner groove 2. The pressure sensor 204 is located at the upper end of the rotary lock 202 and is in contact with its upper protruding part.

[0035] An angle sensor 302 is fixedly installed at the upper end of the corner groove 2 by screws. The sensing end of the angle sensor 302 is set vertically downward and corresponds to the upper end face of the permanent magnet ring 301. A preset gap of 0.5mm-3mm is maintained between the two. An operating handle 5 is fixedly installed at the upper end of the rotary lock 202. An L-shaped limiting groove 501 is opened in the middle of the corner groove 2. The operating handle 5 passes through the L-shaped limiting groove 501 and can move along the groove. Control terminals 4 are fixedly installed on both sides of the gantry crane 101. Two conductive springs 6 are fixedly installed at both ends of the L-shaped limiting groove 501.

[0036] Specifically: In actual use, the permanent magnet ring 301 is embedded in the embedding groove 3. As the rotary lock 202 rotates, it generates a change in the magnetic field angle, becoming the detection object of the angle sensor 302. The mechanical movement of the rotary lock 202 is converted into a sensible magnetic field signal. The angle sensor 302 is fixed at the upper end of the corner groove 2, and its sensing end corresponds to the upper surface of the permanent magnet ring 301, ensuring that the sensor can accurately sense the change in the magnetic field of the permanent magnet ring 301. In turn, the rotation angle of the rotary lock 202 is converted into an electrical signal, realizing real-time monitoring of the position of the rotary lock 202. The operating handle 5 is fixed at the upper end of the rotary lock 202. As a component for the operator to apply force, its rotation directly drives the rotary lock 202 and the permanent magnet ring 301 to rotate synchronously. At the same time, its movement trajectory in the L-shaped limiting groove 501 limits the rotation range of the rotary lock 202.

[0037] Meanwhile, the conductive spring piece 6 is fixed at both ends of the L-shaped limiting groove 501. As a key component for circuit conduction, it cooperates with the arc-shaped contact piece 603 on the operating handle 5 to form an electrical circuit when the rotary lock 202 reaches the preset position. The control terminal 4 is installed on both sides of the gantry crane 101. It receives the angle signal from the angle sensor 302 and the on / off signal from the conductive spring piece 6. By analyzing the two, it judges the connection state of the rotary lock 202 and realizes the monitoring and control of the entire locking and opening process.

[0038] Pressure sensor 204 is electrically connected to control terminal 4 via wire. The bottom of container body 1 is provided with base 102. Four F-TR locks 103 are installed on the upper end of base 102. Base 102 is connected to the bottom of container body 1 via F-TR locks 103. The inner side of conductive spring 6 is provided with arc-shaped groove 601. The middle of operating handle 5 is provided with connecting groove 602. Arc-shaped contact pieces 603 are fixedly installed at the upper and lower ends of the inner side of connecting groove 602. Arc-shaped contact pieces 603 are adapted to arc-shaped groove 601. Control terminal 4 outputs positive and negative voltages. Conductive spring 6 is electrically connected to the positive output terminal of control terminal 4 via wire. Arc-shaped contact pieces 603 are electrically connected to the negative output terminal of control terminal 4 via wire.

[0039] Specifically: Pressure sensors 204 at the four corners of the bottom of container body 1 are in direct contact with the transport platform, collecting contact pressure data at each corner in real time and transmitting it to control terminal 4. Control terminal 4 presets pressure threshold ranges for each corner, covering the pressure range under normal contact conditions. By comparing the real-time pressure value with the threshold, abnormal conditions are accurately identified: when the pressure value of a corner is lower than the threshold, it is determined that there is a risk of separation from the transport platform at that location; when the pressure value is higher than the threshold, it is determined that there may be residual hooking at that location due to incomplete unlocking of the F-TR lock. The independent monitoring characteristic of pressure sensor 204 ensures that the contact status of the four corners is captured separately, providing the control terminal 4 with basic data for quantitative analysis of the risks at each location. This enables comprehensive perception of the overall contact status between the container and the transport platform. The arc-shaped groove 601 on the inner side of the conductive spring 6 matches the arc-shaped structure of the arc-shaped contact piece 603. This curved surface fitting structure increases the contact area and ensures the stability of current conduction. At the same time, the arc-shaped groove 601 provides a certain limiting effect on the arc-shaped contact piece 603, reducing positional offset during contact. The positive and negative voltages output by the control terminal 4 are conducted to the conductive spring 6 and the arc-shaped contact piece 603 respectively through wires. 3. When the operating handle 5 moves the arc-shaped contact piece 603 to contact the conductive spring piece 6, the arc-shaped contact piece 603 is embedded in the arc-shaped groove 601, so that the positive and negative poles are connected through the contact point to form a closed circuit. The control terminal 4 detects the conduction signal. When the arc-shaped contact piece 603 separates from the conductive spring piece 6, the circuit is broken, and the control terminal 4 does not receive the conduction signal. This realizes the precise switching of the circuit on and off state, directly reflecting whether the operating handle 5 has reached the preset position, and thus provides an electrical signal basis for judging the locking or unlocking state of the rotary lock 202. It forms a collaborative verification with the angle detection of the angle sensor 302, improving the reliability of the state judgment.

[0040] Both sides of the connecting groove 602 have chamfered ends 604. The bottom of the corner groove 2 is inlaid with a bearing 201. The bottom of the rotary lock 202 is rotatably located inside the bearing 201. The bottom of the bearing 201 is provided with a sealing ring 203. The sealing ring 203 is located at the through connection between the bottom of the rotary lock 202 and the gantry crane 101. The upper ends of multiple corner grooves 2 are fixedly installed with buzzer alarms 303. Multiple buzzer alarms 303 are electrically connected to angle sensors 302 respectively. Multiple angle sensors 302 are electrically connected to the control terminal 4 respectively.

[0041] Specifically: the chamfered edges 604 at both ends of the connecting groove 602 have a smooth transition edge design that reduces bumps and wear during the installation of the arc-shaped contact piece 603. At the same time, during the process of the operating handle 5 driving the arc-shaped contact piece 603 to contact or separate from the conductive spring piece 6, the sharp edges are prevented from scratching the wires, providing protection for component assembly and relative movement, and ensuring the integrity of the circuit connection. The bearing 201 provides a stable rotation support point for the bottom of the rotary lock 202, so that the rotary lock 202 always maintains axial stability during rotation, reduces radial sway, and ensures the accuracy of the angle change of the permanent magnet ring 301 when it rotates synchronously with the rotary lock 202. This lays the foundation for the accurate detection of the angle sensor 302. Multiple buzzer alarms 303 are electrically connected to the corresponding angle sensors 302, and the angle sensors 302 are connected to the control terminal 4, forming a hierarchical signal transmission path. When the angle sensor 302 detects an abnormal angle of the rotary lock 202, it will synchronously transmit the abnormal signal to the control terminal 4 and the corresponding buzzer alarm 303. The buzzer alarm 303 will immediately issue an audible alarm to quickly indicate the abnormality. The control terminal 4 will receive and record the abnormal information, realizing the coordination of audible warning and information recording.

[0042] The angle sensor 302 is a magnetoelectric sensor with a detection accuracy of no less than ±0.5° and an operating temperature range of -40℃ to 85℃. The permanent magnet ring 301 is a radially magnetized neodymium iron boron magnetic ring with an outer diameter that matches the inner diameter of the embedded groove 3. The thickness of the permanent magnet ring 301 is 3mm-5mm. The arc-shaped contact piece 603 is made of brass and has a gold-plated surface. The conductive spring 6 is an elastic structure with a pre-compression spring. The contact pressure when the two are in contact is 5N-10N. The high accuracy of the magnetoelectric angle sensor 302 and the stable magnetic field output of the neodymium iron boron magnetic ring ensure accurate angle detection. The gold-plated brass arc-shaped contact piece 603 and the conductive spring 6 with a pre-compression spring achieve stable conductivity under a specific contact pressure. The temperature resistance and wear resistance of each component together ensure the long-term reliable operation of the device in complex environments, providing a performance foundation for the accurate detection and early warning of the F-TR lock engagement status.

[0043] The working principle of this utility model is as follows: In specific use, the container body 1 is first hoisted to the bottom of the gantry crane 101, so that the rotary lock 202 is aligned with the locking hole of the container corner fitting. The operator drives the rotary lock 202 to rotate through the operating handle 5. At this time, the permanent magnet ring 301 embedded in the groove 3 at the upper end of the rotary lock 202 rotates synchronously with the rotary lock 202. The angle sensor 302 at the upper end of the corner groove 2 senses the change in the rotation angle of the permanent magnet ring 301 in real time and continuously transmits the angle signal to the control terminal 4. The control terminal 4 records the rotation angle of the rotary lock 202 in real time.

[0044] When the rotary lock 202 is rotated to the locked position, the operating handle 5 moves to the end along the L-shaped limiting groove 501. The arc-shaped contact piece 603 in the connecting groove 602 of the operating handle 5 contacts the conductive spring piece 6 at the end of the L-shaped limiting groove 501. Since the conductive spring piece 6 is electrically connected to the positive output terminal of the control terminal 4, and the arc-shaped contact piece 603 is electrically connected to the negative output terminal of the control terminal 4, a closed circuit is formed after they come into contact. The control terminal 4 simultaneously receives the conduction signal. The control terminal 4 compares the angle value transmitted by the angle sensor 302 with the preset locking angle, and at the same time verifies whether it receives the conduction signal from the conductive spring piece 6 and the arc-shaped contact piece 603. If the angle meets the standard and the signal is conducting, the rotary lock 202 is determined to be in an effective locking state. If the angle does not meet the standard or the signal is not conducting, the state is determined to be abnormal. The control terminal 4 immediately triggers the buzzer alarm 303 of the corresponding angle groove 2 to sound an alarm and displays the abnormal position on the terminal.

[0045] When the rotary lock 202 is locked and lifting begins, the pressure sensor 204 in the gantry spreader 101 collects the pressure value at the contact point between the gantry spreader 101 and the container body 1 in real time and transmits the data to the control terminal 4. The control terminal 4 presets a gravity pressure threshold for the corresponding working condition (matching the normal lifting pressure range corresponding to the container's self-weight and loading weight). During lifting, if the pressure sensor 204 detects that the pressure value suddenly drops below the threshold and contradicts the locking status signal of the rotary lock 202 fed back by the angle sensor 302, the control terminal 4 determines that there is a risk of decoupling; if the pressure value is abnormally high or fluctuates frequently, combined with the fact that the angle signal of the rotary lock 202 has not reached the fully unlocked state, it is determined that there may be residual F-TR lock hooking (i.e., the container is not completely separated from the transport platform). At this time, the control terminal 4 immediately triggers the buzzer alarm 303 and displays the abnormality type and location on the terminal to ensure that the risk of hooking or decoupling during the lifting process is identified in a timely manner.

[0046] When unlocking is required, the operating handle 5 is rotated in the opposite direction. The rotary lock 202 drives the permanent magnet ring 301 to rotate in the opposite direction. The angle sensor 302 transmits the angle signal in real time. When the rotary lock 202 returns to the open position, the arc-shaped contact piece 603 contacts the conductive spring piece 6 at the other end of the L-shaped limit groove 501 to form a closed circuit. After receiving the conduction signal, the control terminal 4 combines the angle data of the angle sensor 302 to confirm that the rotary lock 202 is in an effective open state. If the angle and the signal do not match, an alarm will be triggered to prompt the operator to check and adjust.

[0047] 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.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A detection and early warning device for F-TR lock hooking of a container, comprising a container body (1) and a gantry crane (101), characterized in that: The bottom of the gantry crane (101) is provided with corner grooves (2) at the four corners. Each corner groove (2) is provided with a rotary lock (202). The rotary lock (202) passes through the corner groove (2) and extends to the outside of the bottom of the gantry crane (101). The upper end of the rotary lock (202) is provided with an embedded groove (3). A permanent magnet ring (301) is embedded in the embedded groove (3). A pressure sensor (204) is provided in the middle of the corner groove (2). The pressure sensor (204) is located at the upper end of the rotary lock (202) and is in contact with its upper protruding part. An angle sensor (302) is fixedly installed at the upper end of the corner groove (2) by screws. The sensing end of the angle sensor (302) is set vertically downward and corresponds to the upper end face of the permanent magnet ring (301). A preset gap of 0.5mm-3mm is maintained between the two. An operating handle (5) is fixedly installed at the upper end of the rotary lock (202). An L-shaped limiting groove (501) is opened in the middle of the corner groove (2). The operating handle (5) passes through the L-shaped limiting groove (501) and can move along the groove. Control terminals (4) are fixedly installed on both sides of the gantry crane (101). Two conductive springs (6) are fixedly installed at both ends of the L-shaped limiting groove (501).

2. The detection and early warning device for container F-TR lock engagement according to claim 1, characterized in that: The pressure sensor (204) is electrically connected to the control terminal (4) via a wire. The bottom of the container body (1) is provided with a base (102). Four F-TR locks (103) are installed on the upper end of the base (102). The base (102) is connected to the bottom of the container body (1) via the F-TR locks (103). The inner side of the conductive spring (6) is provided with an arc-shaped groove (601). The middle part of the operating handle (5) is provided with a connecting groove (602). The upper and lower ends of the inner side of the connecting groove (602) are fixedly installed with arc-shaped contact pieces (603).

3. The detection and early warning device for container F-TR lock engagement according to claim 2, characterized in that: The arc-shaped contact piece (603) is adapted to the arc-shaped groove (601), the control terminal (4) outputs positive and negative voltages, the conductive spring piece (6) is electrically connected to the positive output terminal of the control terminal (4) through a wire, and the arc-shaped contact piece (603) is electrically connected to the negative output terminal of the control terminal (4) through a wire.

4. The detection and early warning device for container F-TR lock engagement according to claim 2, characterized in that: The connecting groove (602) has chamfered corners (604) at both the top and bottom ends on both sides. A bearing (201) is inlaid at the bottom of the corner groove (2). The bottom of the rotary lock (202) is rotatably located inside the bearing (201). A sealing ring (203) is provided at the bottom of the bearing (201). The sealing ring (203) is located at the through connection between the bottom of the rotary lock (202) and the gantry crane (101).

5. The detection and early warning device for container F-TR lock engagement according to claim 1, characterized in that: Each of the multiple corner slots (2) is fixedly equipped with a buzzer alarm (303), and the multiple buzzer alarms (303) are electrically connected to the angle sensor (302) respectively. The multiple angle sensors (302) are electrically connected to the control terminal (4) respectively.

6. The detection and early warning device for container F-TR lock engagement according to claim 1, characterized in that: The angle sensor (302) is a magnetoelectric sensor with a detection accuracy of not less than ±0.5° and an operating temperature range of -40°C to 85°C.

7. The detection and early warning device for container F-TR lock engagement according to claim 1, characterized in that: The permanent magnet ring (301) is a radially magnetized neodymium iron boron magnet ring, whose outer diameter is matched with the inner diameter of the embedded groove (3), and the thickness of the permanent magnet ring (301) is 3mm-5mm.

8. The detection and early warning device for container F-TR lock engagement according to claim 2, characterized in that: The arc-shaped contact piece (603) is made of brass and has a gold-plated surface. The conductive spring (6) is an elastic structure with a pre-compression spring. The contact pressure when the two come into contact is 5N-10N.

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