Clamping state recognition device of three-jaw clamp and use method of clamping state recognition device

Abstract

The invention relates to a clamping state recognition device of a three-jaw clamp, the clamping state of the three-jaw clamp for clamping a convection plate can be remotely recognized in a cab, the three-jaw clamp comprises a connecting rod and a clamping seat used for being in contact with the convection plate, the clamping seat is arranged on the connecting rod, and the connecting rod is connected with the clamping seat. The clamping state recognition device comprises a monitoring mechanism, an indicating mechanism and a control mechanism. A mounting hole is formed in the contact position of the clamping seat and the convection plate, the axis of the mounting hole is perpendicular to the axis of the second connecting rod, one end of the mounting hole is close to the convection plate, and the other end of the mounting hole is far away from the convection plate; a monitoring mechanism is arranged in the mounting hole and comprises an inductive load sensor, a sliding rod and a spring, the inductive load sensor is fixedly arranged in the mounting hole and is far away from the convection plate, the sliding rod is located in the mounting hole, one end of the sliding rod and the inductive load sensor are arranged at an interval, and the other end of the sliding rod extends out of the mounting hole; the sliding rod is sleeved with the spring, one end of the spring is fixedly connected with the sliding rod, and the other end of the spring is fixedly connected with the inner wall of the mounting hole. The control mechanism is electrically connected with the inductance type load sensor, the indicating mechanism is arranged in a cab and electrically connected with the control mechanism, and the indicating mechanism comprises a first indicating lamp used for displaying the clamping state and a second indicating lamp used for displaying the non-clamping state.

Description

Technical Field

[0001] This invention relates to the field of metallurgical production technology, specifically to a clamping status identification device for a three-jaw chuck and its usage method. Background Technology

[0002] The three-jaw clamp is a core piece of equipment in the annealing operation of steel coils in a bell-type furnace. During operation, the operator in the cab operates the auxiliary lifting device equipped with the three-jaw clamp to first grab the convection plate and place it on top of the vertical steel coil being heated in the furnace. Then, the operator operates the vertical lifting device of the main lifting device to stack another vertical steel coil on top of the convection plate. Under normal circumstances, the heating furnace can accommodate multiple vertical steel coils, so multiple convection plates are required. These convection plates are not only used to clamp the steel coils, but also serve as separators to ensure smooth heat convection in the furnace and improve heat treatment efficiency.

[0003] However, when using a three-jaw chuck to grab a convection plate, the operator in the cab is far from the chuck and their view is often blocked by the cover, making it impossible to accurately judge whether the chuck has clamped the target object. This problem is more prominent in nighttime operations or high-temperature environments, which can easily lead to misoperation, resulting in risks such as the chuck being misaligned, materials falling, etc. In severe cases, it may even injure on-site personnel and induce major safety accidents.

[0004] Traditional operating methods rely entirely on the operator's visual observation and experience judgment, lacking a systematic gripper status recognition mechanism, which seriously restricts the process of upgrading the bell-type furnace steel coil annealing operation to automation and intelligence. Summary of the Invention

[0005] In view of the deficiencies of the prior art described above, the technical problem to be solved by the present invention is to provide a clamping state recognition device for a three-jaw gripper and its usage method, which can improve the safety, controllability and intelligence level of the three-jaw gripper's grasping operation, and provide technical support for subsequent remote unattended operations.

[0006] To achieve the above objectives, the present invention provides a clamping state identification device for a three-jaw chuck, capable of remotely identifying the clamping state of the three-jaw chuck gripping a convection plate from the driver's cab. The three-jaw chuck includes a connecting rod and a clamping seat for contacting the convection plate. The clamping seat is mounted on the connecting rod. The clamping state identification device includes a monitoring mechanism, an indicating mechanism, and a control mechanism. A mounting hole is provided at the contact position between the clamping seat and the convection plate. The axis of the mounting hole is perpendicular to the axis of the second connecting rod, and one end of the mounting hole is close to the convection plate, while the other end is away from the convection plate. A monitoring mechanism is provided in the mounting hole, and the monitoring mechanism includes an electric... The system comprises an inductive load sensor, a sliding rod, and a spring. The inductive load sensor is fixedly mounted in a mounting hole, away from the convection plate. The sliding rod is located in the mounting hole, with one end spaced apart from the inductive load sensor and the other end extending out of the mounting hole. The spring is fitted onto the sliding rod, with one end fixedly connected to the sliding rod and the other end fixedly connected to the inner wall of the mounting hole. A control mechanism is electrically connected to the inductive load sensor. An indicator mechanism is located in the driver's cab and electrically connected to the control mechanism. The indicator mechanism includes a first indicator light for displaying the clamping status and a second indicator light for displaying the unclamped status.

[0007] Furthermore, three mounting holes are provided at the contact position between the clamp and the convection plate, and a monitoring mechanism is respectively provided in each of the three mounting holes.

[0008] Furthermore, it also includes a video surveillance mechanism, which includes a camera and a first display. The camera is mounted on a three-jaw clamp and electrically connected to the first display, which is located in the driver's cab.

[0009] Furthermore, it also includes a remote operating mechanism, which includes a second display and a wireless network component. The camera of the video surveillance mechanism is electrically connected to the first display and the second display respectively through the wireless network component. The wireless network component includes a wireless base station and a wireless client electrically connected to the wireless base station.

[0010] Furthermore, it also includes a voice broadcasting mechanism for real-time voice alarms, the voice broadcasting mechanism including a voice broadcasting speaker electrically connected to the control mechanism, and the first display and the second display are each respectively provided with a voice broadcasting speaker.

[0011] The present invention also discloses a method of using a clamping state recognition device, wherein the clamping state recognition device is used and the method of use includes the following steps:

[0012] S1. When the three-jaw clamp comes into contact with the convection plate, the sliding rod of the monitoring mechanism moves in contact with the convection plate, and the inductive load sensor monitors the load data of the three-jaw clamp.

[0013] S2. The monitoring data is transmitted to the control mechanism. The control mechanism analyzes the monitoring data. If the monitoring data measured by the three monitoring mechanisms of the three-jaw clamp all reach the set value, the control mechanism controls the first indicator light of the indicator mechanism in the cab to light up, and the operator continues to operate the three-jaw clamp.

[0014] S3. If the monitoring data measured by any monitoring mechanism of the three-jaw chuck does not reach the set value, the control mechanism will control the second indicator light of the indicator mechanism in the cab to light up, reminding the operator of the actual clamping status of the three-jaw chuck, and the operator will stop operating the three-jaw chuck.

[0015] As described above, the clamping state recognition device for the three-jaw clamp and its method of use disclosed in this invention have the following beneficial effects:

[0016] By setting up monitoring, indicating, and control mechanisms, operators can monitor the real-time operating conditions of the three-jaw chuck during operation. This effectively prevents the chuck from lifting when the grip on the convection plate is not secure, thus mitigating the risk of accidents caused by the plate falling. In case of abnormalities, such as a loose grip by one of the jaws, the indicating mechanism can promptly issue a warning, prompting the operator to stop the machine immediately to ensure safety. The abnormality should be reported to the responsible point for timely handling, preventing the escalation of malfunctions or abnormalities. This not only improves operational safety but also ensures smooth operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the field installation of the clamping status recognition device of the present invention.

[0018] Figure 2 This is a schematic diagram of the monitoring mechanism in this invention.

[0019] Figure 3 This is a flowchart illustrating the operation of the clamping state recognition device of the present invention.

[0020] Explanation of icon numbers

[0021] 1. Monitoring mechanism; 101. Inductive load sensor; 102. Slide bar; 103. Spring; 2. Indicating mechanism; 201. First indicator light; 202. Second indicator light; 3. Control mechanism; 4. Connecting rod; 5. Clamp; 501. Mounting hole; 6. Cab; 7. Video monitoring mechanism; 701. Camera; 702. First display; 8. Remote operation mechanism; 801. Second display; 802. Wireless network component; 821. Wireless base station; 822. Wireless client; 9. Voice broadcasting mechanism. Detailed Implementation

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 for 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. Therefore, they should not be construed as limitations on 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.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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.

[0025] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0026] See Figures 1 to 3This invention provides a clamping state identification device for a three-jaw chuck, capable of remotely identifying the clamping state of the three-jaw chuck gripping a convection plate from the cab 6. The three-jaw chuck includes a connecting rod 4 and a clamping seat 5 for contacting the convection plate. The clamping seat 5 is disposed on the connecting rod 4. The clamping state identification device includes a monitoring mechanism 1, an indicating mechanism 2, and a control mechanism 3. A mounting hole 501 is provided at the contact position between the clamping seat 5 and the convection plate. The axis of the mounting hole 501 is perpendicular to the axis of the second connecting rod 4, and one end of the mounting hole 501 is close to the convection plate, while the other end is away from the convection plate. A monitoring mechanism 1 is disposed in the mounting hole 501. The monitoring mechanism 1 includes an inductive load sensor 101, a slide rod 102, and a spring 103. The inductive load sensor 101 is fixedly disposed in the mounting hole 501 and away from the convection plate. Preferably, the detection distance of the inductive load sensor 101 is set to 1. The thickness is 0-15mm, and the working temperature is set to 150°-200°. It is suitable for harsh environments such as high temperature and has strong applicability. The slide rod 102 is located in the mounting hole 501, and one end of the slide rod 102 is spaced apart from the inductive load sensor 101, while the other end extends out of the mounting hole 501. The spring 103 is fitted on the slide rod 102, and one end of the spring 103 is fixedly connected to the slide rod 102, while the other end is fixedly connected to the inner wall of the mounting hole 501. The control mechanism 3 is electrically connected to the inductive load sensor 101. Preferably, the control mechanism 3 includes a PLC controller. The data monitored by the inductive load sensor 101 can be transmitted to the PLC controller for logical judgment. The indicator mechanism 2 is set in the cab 6 and electrically connected to the control mechanism 3. The indicator mechanism 2 includes a first indicator light 201 for displaying the clamping status and a second indicator light 202 for displaying the unclamped status.

[0027] The basic working principle of the clamping state recognition device for the three-jaw chuck involved in this invention is as follows: A monitoring mechanism 1 is set up, in which an inductive load sensor 101 is included, which has the advantages of no contact interference and does not affect the motion state of the object being measured. When the three-jaw chuck clamps the convection plate, the end of the slide rod 102 near the convection plate can contact the convection plate. During the clamping process, the slide rod 102 can move away from the convection plate along the axis of the mounting hole 501. At this time, the spring 103 is in an elastic energy storage state, and the end of the slide rod 102 away from the convection plate gradually moves towards the inductive load sensor 101. The inductive load sensor 101 then monitors the clamping force of the three-jaw chuck. Simultaneously, the inductive load sensor 101 can... The monitoring data is transmitted to the control mechanism 3. When the monitoring data measured by the three monitoring mechanisms 1 of the three-jaw gripper all reach the set value, the control mechanism 3 controls the first indicator light 201 of the indicator mechanism 2 in the cab 6 to light up. Specifically, the lighting of the first indicator light 201 indicates that the three-jaw gripper is in a clamping state, that is, the three-jaw gripper has clamped the convection plate. When the monitoring data measured by any one of the monitoring mechanisms 1 of the three-jaw gripper does not reach the set value, the control mechanism 3 controls the second indicator light 202 of the indicator mechanism 2 in the cab 6 to light up. The lighting of the second indicator light indicates that the three-jaw gripper is in an unclamped state, that is, the three-jaw gripper has not clamped the convection plate, thus reminding the operator of the actual clamping status of the three-jaw gripper, which can improve the safety, controllability and intelligence level of the three-jaw gripper's gripping operation.

[0028] See Figures 1 to 3 The present invention will be further described below with reference to a specific embodiment:

[0029] In this embodiment, see Figure 1 , Figure 2 As a preferred design, three mounting holes 501 are provided at the contact position between the clamp 5 and the convection plate. Each of the three mounting holes 501 is equipped with a monitoring mechanism 1. Specifically, nine monitoring mechanisms 1 are provided in the three clamps 5 of the three-jaw clamp, and the inductive load sensors 101 of the nine monitoring mechanisms 1 are electrically connected to the control mechanism 3. When the monitoring data measured by the inductive load sensors 101 of the nine monitoring mechanisms 1 all reach the set value, the control mechanism 3 controls the first indicator light 201 of the indicator mechanism 2 in the cab 6 to light up. When the monitoring data measured by any one of the inductive load sensors 101 of the nine monitoring mechanisms 1 does not reach the set value, the control mechanism 3 controls the second indicator light 202 of the indicator mechanism 2 in the cab 6 to light up. By setting multiple monitoring mechanisms 1 on the clamp 5, on the one hand, the overall monitoring stability can be improved and single-point failure can be avoided. On the other hand, the data acquisition coverage can be expanded to better cope with the working scenario when the outer edge of the convection plate is curved.

[0030] In this embodiment, see Figure 1 , Figure 3 As a preferred design, it also includes a video monitoring mechanism 7, which includes a camera 701 and a first display 702. The camera 701 is mounted on the three-jaw gripper and electrically connected to the first display 702. The first display 702 is mounted in the cab 6. By setting up the camera 701 and the first display 702, the camera 701 can capture video images of the three-jaw gripper, enabling the first display 702 to simultaneously display the working screen and status information of the three-jaw gripper, realizing visual feedback of the gripping operation of the three-jaw gripper. This can assist the operator in completing the gripping operation and further improve the safety, controllability, and intelligence level of the gripping operation of the three-jaw gripper.

[0031] In this embodiment, see Figure 1 , Figure 3 As a preferred design, it also includes a remote operation mechanism 8, which includes a second display 801 and a wireless network component 802. The camera 701 of the video monitoring mechanism 7 is electrically connected to the first display 702 and the second display 801 respectively via the wireless network component 802. The wireless network component 802 includes a wireless base station 821 and a wireless client 822 electrically connected to the wireless base station 821. Preferably, it also includes an intelligent monitoring terminal installed in the first display 702 and the second display 801. The intelligent monitoring terminal is electrically connected to the control mechanism 3, and the video images captured by the camera 701 of the video monitoring mechanism 7 can be transmitted to the first display 702 via the wireless network component 802. The intelligent monitoring terminal on the first display 702 and the intelligent monitoring terminal on the second display 801 enable both the cab 6 and the remote operating mechanism 8 to display the gripping status of the three-jaw chuck in real time. Operators can perform operations based on the gripping status of the three-jaw chuck. At the same time, by setting up a wireless network component 802, the cab 6 and the remote operating mechanism 8 can maintain wireless communication and realize the synchronous display of the gripping status of the three-jaw chuck. This is suitable for dispatchers and remote operators to monitor the work site in real time and provide decision support for remote control. Setting up a wireless network component 802 can also further improve the level of automation and enhance the safety, controllability, and intelligence of the three-jaw chuck gripping operation.

[0032] In other embodiments, operators can also directly operate the three-jaw gripper through the remote operating mechanism 8, enabling operators to operate more safely and efficiently, avoiding the need for personnel to confirm on the ground whether the grip is secure when grabbing the convection plate in a high-temperature environment on site; in other embodiments, the video images captured by the camera 701 can also be sent to the intelligent monitoring terminal in the first display 702 and the intelligent monitoring terminal in the second display 801 via network cable.

[0033] In this embodiment, see Figure 1 , Figure 3 As a preferred design, it also includes a voice broadcasting mechanism 9 for real-time voice alarms. The voice broadcasting mechanism 9 includes a voice broadcasting speaker electrically connected to the control mechanism 3. Voice broadcasting speakers are also respectively installed on the first display 702 and the second display 801. Preferably, the voice broadcasting speaker uses an industrial-grade programmable voice module, supporting multi-channel command recognition and stable broadcasting under high-temperature environments. Specifically, when the monitoring data measured by any one of the inductive load sensors 101 of the nine monitoring mechanisms 1 fails to reach the set value, the control mechanism 3 controls the voice broadcasting speaker to issue an alarm, further improving the safety, controllability, and intelligence level of the three-jaw gripper's grasping operation. Preferably, the control mechanism 3 can also control the voice broadcasting... The loudspeaker immediately issues a fault alarm signal. When the three-jaw chuck detects any abnormality during operation, such as signal loss, the control mechanism 3 can remind the operator through voice broadcast, display the specific fault type on the intelligent monitoring terminal, and issue an alarm response to ensure timely handling and prevent the accident from escalating. Through the control mechanism 3, corresponding output signals can also be generated according to different states of the three-jaw chuck during operation. These signals can be displayed in real time on the first and second display screens to show the current working status of the three-jaw chuck. At the same time, the loudspeaker can also issue voice prompts to inform the operator of the current status, thereby ensuring that the operator can obtain equipment operation information in a timely manner and improve the safety and efficiency of operation.

[0034] In this embodiment, see Figure 1 , Figure 3 During installation, the clamping status recognition device of the three-jaw clamp of the present invention can be installed in the electrical beam of the work site, and the PLC controller of the control mechanism 3 can be installed. The signal is connected to the voice broadcast speaker of the voice broadcast mechanism 9, the intelligent monitoring terminal in the first display 702 of the cab 6, and the intelligent monitoring terminal in the second display 801 of the remote operation mechanism 8 through the intermediate relay. At the same time, an industrial-grade wireless client 822 is installed on the end beam of the trolley, using a 2.4GHz / 5GHz dual-band communication mode to improve the communication anti-interference capability. The wireless base station 8 of the remote operation mechanism 8 is deployed on the steel structure beam of the factory building. 21. It adopts gigabit fiber optic links to transmit signals, realizing high-bandwidth, low-latency image and data backhaul. By setting up a voice broadcasting mechanism 9, a video monitoring mechanism 7, and a remote operation mechanism 8, it realizes human-machine interface information interaction function, forming a remote visual monitoring closed-loop control system. Furthermore, the monitoring mechanism 1, the indicating mechanism 2, the control mechanism 3, the voice broadcasting mechanism 9, the video monitoring mechanism 7, and the remote operation mechanism 8 all adopt IP65 protection level and are equipped with redundant power supply systems to ensure stable operation in complex electromagnetic environments. In addition, grounding protection and short-circuit protection devices are also set up to ensure the overall electrical safety of the system.

[0035] In this embodiment, see Figure 1 , Figure 2 , Figure 3 The clamping status identification device for the three-jaw chuck of this invention was tested on the 4-2 overhead crane in area 2030 of Baosteel Cold Rolling Mill. The device displayed the real-time status of the three-jaw chuck during operation. During the test, when the load signal of the three-jaw chuck showed abnormalities, the clamping status identification device enabled operators to quickly pinpoint the anomaly and take efficient measures to resolve it, preventing the anomaly from escalating. This provides a strong guarantee for improving operational safety and efficiency, thereby reducing the risk of equipment damage and personnel injury, laying the foundation for subsequent widespread application. Furthermore, it can also reduce labor costs. Based on a cost of 345*2*30*12 = 248,400 yuan per shift for ground personnel, this translates to a reduction of nearly 250,000 yuan in labor costs annually.

[0036] See Figures 1 to 3 The present invention also discloses a method of using the clamping state recognition device, wherein the clamping state recognition device is used and the method of use includes the following steps:

[0037] S1. When the three-jaw clamp comes into contact with the convection plate, the slide bar 102 of the monitoring mechanism 1 moves in contact with the convection plate, and the inductive load sensor 101 monitors the load data of the three-jaw clamp.

[0038] S2. The monitoring data is transmitted to the control mechanism 3. The control mechanism 3 analyzes the monitoring data. If the monitoring data measured by the three monitoring mechanisms 1 of the three-jaw clamp all reach the set value, the control mechanism 3 controls the first indicator light 201 of the indicator mechanism 2 in the cab 6 to light up, and the operator continues to operate the three-jaw clamp.

[0039] S3. If the monitoring data measured by any monitoring mechanism 1 of the three-jaw clamp does not reach the set value, the control mechanism 3 controls the second indicator light 202 of the indicator mechanism 2 in the cab 6 to light up. At the same time, the voice broadcasting mechanism 9 provides a real-time voice alarm to remind the operator of the actual clamping status of the three-jaw clamp and stops the operation of the three-jaw clamp.

[0040] S4. The operation video of the three-jaw clamp is collected in real time through the camera 701 of the video monitoring mechanism 7. The staff can view the actual situation of the three-jaw clamp through the first display 702 of the video monitoring mechanism 7. The remote operator can monitor the actual situation of the three-jaw clamp in real time through the second display 801 of the remote operation mechanism 8 to provide decision support.

[0041] As described above, the clamping state recognition device and method for the three-jaw chuck of the present invention have the following beneficial effects:

[0042] By setting up monitoring mechanism 1, indicating mechanism 2, and control mechanism 3, operators can monitor the real-time working conditions of the three-jaw clamp during operation. This effectively prevents the clamp from lifting when the gripper is not secure, thus mitigating the risk of the clamp falling off the convection plate. In case of abnormalities, such as a loose grip by one of the jaws, the indicating mechanism 2 can promptly issue a warning, prompting the operator to stop the machine immediately to ensure safety. The abnormality should be reported to the responsible point for timely handling, preventing the escalation of the malfunction or abnormality. This not only improves operational safety but also ensures smooth operation.

[0043] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A clamping state identification device of a three-jaw clamp, capable of remotely identifying the clamping state of the three-jaw clamp clamping a convection plate in a cab (6), the three-jaw clamp comprising three connecting rods (4), three clamping seats (5) for contacting the convection plate, the clamping seats (5) being arranged on the connecting rods (4), characterized in that: The clamping state recognition device comprises a monitoring mechanism (1), an indicating mechanism (2), and a control mechanism (3); the contact position of the clamping seat (5) and the convection plate is provided with a mounting hole (501), the axis of the mounting hole (501) is perpendicular to the axis of the second connecting rod (4), and one end of the mounting hole (501) is close to the convection plate and the other end is away from the convection plate; the monitoring mechanism (1) is arranged in the mounting hole (501), the monitoring mechanism (1) comprises an inductive load sensor (101), a sliding rod (102), and a spring (103), the inductive load sensor (101) is fixedly arranged in the mounting hole (501) and away from the convection plate, the sliding rod (102) is arranged in the mounting hole (501), one end of the sliding rod (102) is arranged in the inductive load sensor (101) in a spaced manner, and the other end of the sliding rod (102) extends out of the mounting hole (501), the spring (103) is sleeved on the sliding rod (102), one end of the spring (103) is fixedly connected with the sliding rod (102), and the other end of the spring (103) is fixedly connected with the inner wall of the mounting hole (501); the control mechanism (3) is electrically connected with the inductive load sensor (101), the indicating mechanism (2) is arranged in the cab (6) and electrically connected with the control mechanism (3), and the indicating mechanism (2) comprises a first indicating lamp (201) for displaying the clamping state and a second indicating lamp (202) for displaying the unclamping state. ​ 2. The chucking state recognition device of a three-jaw chuck according to claim 1, characterized in that: The contact position of the clamping seat (5) and the convection plate is provided with three mounting holes (501), and the monitoring mechanism (1) is arranged in each of the three mounting holes (501).

3. The chucking state recognition device of a three-jaw chuck according to claim 2, characterized in that: The video monitoring mechanism (7) is further included, the video monitoring mechanism (7) comprises a camera (701) and a first display (702), the camera (701) is arranged on the three-jaw clamp and electrically connected with the first display (702), and the first display (702) is arranged in the cab (6).

4. The chucking state recognition device of a three-jaw chuck according to claim 3, characterized in that: The remote operation mechanism (8) is further included, the remote operation mechanism (8) comprises a second display (801) and a wireless network component (802), the camera (701) of the video monitoring mechanism (7) is electrically connected with the first display (702) and the second display (801) through the wireless network component (802), and the wireless network component (802) comprises a wireless base station (821) and a wireless client (822) electrically connected with the wireless base station (821).

5. The chucking state recognition device of a three-jaw chuck according to claim 4, characterized in that: The voice broadcast mechanism (9) for real-time voice alarm is further included, the voice broadcast mechanism (9) comprises a voice broadcast speaker electrically connected with the control mechanism (3), and the first display (702) and the second display (801) are respectively provided with the voice broadcast speaker.

6. A method of using a clamp condition identification device, characterized by: The clamping state recognition device is used, and the use method comprises the following steps: S1, when the three-jaw clamp contacts the convection plate, the sliding rod (102) of the monitoring mechanism (1) moves under the contact of the convection plate, and the inductive load sensor (101) monitors the load data of the three-jaw clamp. S2, transmit the monitoring data to the control mechanism (3), the control mechanism (3) analyzes the monitoring data, if the monitoring data measured by the three monitoring mechanisms (1) of the three-jaw clamp all reach the set value, the control mechanism (3) controls the first indicating lamp (201) of the indicating mechanism (2) in the cab (6) to light up, and the worker continues to operate the three-jaw clamp; S3, if the monitoring data measured by any one monitoring mechanism (1) of the three-jaw clamp does not reach the set value, the control mechanism (3) controls the second indicating lamp (202) of the indicating mechanism (2) in the cab (6) to light up, reminding the worker of the actual clamping state of the three-jaw clamp, and the worker stops operating the three-jaw clamp.

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