Patrol protection instrument

Abstract

The utility model discloses a patrol protection instrument, relates to the technical field of driving safety, is used for realizing safety patrol before a crown block runs, and provides the patrol protection instrument aiming at the problem that the safety patrol is realized by manpower at present. And the monitor is arranged in the cab, so that the remote inspection of crown block operators in the cab is realized, and the problems of blurred sight and the like caused by distance are solved. Meanwhile, an operator in a cab can control the movement of the rotating mechanism through the control handle, so that the orientation of the camera is adjusted, the patrolling range is expanded, and the problem that obstacles, dead angles and the like possibly exist in a single direction is solved. Meanwhile, the multi-view angle is also beneficial for operators not to completely depend on command gestures of command personnel when the operators control the operation of the crown block, and can assist the control of the crown block according to the far-end view angle returned by the camera, so that the driving safety is better guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of driving safety, in particular to a patrol protection device. Background Art

[0002] In the production activities of factories and mines today, objects are usually hoisted by double (single) beam cranes, which are divided into double beam and single beam, also known as overhead cranes. Considering that overhead cranes are large-scale machinery, extra attention should be paid to driving safety before they are officially operated to avoid causing damage to personnel or objects and affecting safe production.

[0003] At present, the safety inspection before the start of the overhead crane is mainly carried out manually. Before the overhead crane is started, the safety items above the driving route and around the track are inspected to see if there are any abnormal conditions, whether the items are hung properly, whether the lifting is crooked, the position of the commander, the command gestures, etc. Especially when the overhead crane is driving at the non-operating end (i.e. the far end of the operator's position), the operator may realize that there may be obstacles, blind spots and other limited vision problems in front, as well as blurred vision caused by distance. At this time, the control of the overhead crane is completely dependent on the command gestures, which may cause personal or property damage and other serious problems that affect safe production.

[0004] Therefore, technicians in this field are in urgent need of a patrol protection device to realize safety patrol before the start of the overhead crane, so as to solve the problems that are not conducive to safety patrol, such as limited remote vision and blurred vision. Utility Model Content

[0005] The utility model aims to provide a patrol protection device for realizing safety patrol before the start of the overhead crane and solving the problems of limited far-end vision, blurred vision and other problems that are not conducive to safety patrol.

[0006] In order to solve the above technical problems, the utility model provides a patrol protection device.

[0007] A patrol protection device, characterized in that it comprises: a camera, a rotating mechanism, a monitor and a control handle;

[0008] The rotating mechanism is in communication connection with the control handle, and the camera is fixed on the rotating mechanism; the rotating mechanism is used to adjust the direction of the camera according to the control instruction sent by the control handle;

[0009] The rotating mechanism is arranged on the outer side of the overhead travelling crane track and is located on the other side relative to the driving cab; the camera faces the initial position of the overhead travelling crane by default;

[0010] The camera is in communication with the monitor and is used to collect image information and return it to the monitor;

[0011] The monitor is arranged in the cab and is used for displaying the image information collected by the camera.

[0012] In a possible embodiment, the rotating mechanism includes: a fixed disk, a first motor, a second motor and a fixed frame;

[0013] Wherein, the camera is fixed on the fixed plate;

[0014] The first motor is connected to the fixed disk shaft, and the first motor is used to drive the fixed disk to move in the horizontal direction;

[0015] The second motor is connected to the first motor shaft, and the first motor is used to drive the first motor to move in a vertical direction;

[0016] The second motor is fixedly connected to the fixing frame, and the fixing frame is arranged on the outer side of the overhead travelling vehicle track and is located on the other side relative to the driving cab.

[0017] In a possible embodiment, the rotating mechanism further includes: a horizontal motion control circuit and a vertical motion control circuit;

[0018] The horizontal motion control circuit comprises: a first switch contact, a second switch contact and a first capacitor;

[0019] Wherein, the first switch contact and the second switch contact are contacts corresponding to the horizontal direction control switches on the control handle;

[0020] The first switch contact is arranged in the forward rotation circuit of the first motor. When the first switch contact is closed, the forward rotation circuit is turned on, and the first motor rotates forward. The second switch contact is arranged in the reverse rotation circuit of the first motor. When the second switch contact is closed, the reverse rotation circuit is turned on, and the first motor rotates reversely.

[0021] The two ends of the first capacitor are respectively connected between the positive input terminal and the negative input terminal of the first motor;

[0022] The vertical motion control circuit comprises: a third switch contact, a fourth switch contact and a second capacitor;

[0023] Wherein, the third switch contact and the fourth switch contact are contacts corresponding to the vertical direction control switches on the control handle;

[0024] The third switch contact is arranged in the forward rotation circuit of the second motor. When the third switch contact is closed, the forward rotation circuit is turned on, and the second motor rotates forward. The fourth switch contact is arranged in the reverse rotation circuit of the second motor. When the fourth switch contact is closed, the reverse rotation circuit is turned on, and the second motor rotates reversely.

[0025] Two ends of the second capacitor are respectively connected between the positive input terminal and the negative input terminal of the second motor.

[0026] In a possible embodiment, the horizontal motion control circuit further includes: a first limit switch and a second limit switch;

[0027] The first limit switch is arranged in the forward rotation circuit of the first motor, and the first limit switch is closed by default; when the fixed plate moves to the first limit point, the first limit switch is opened;

[0028] The second limit switch is arranged in the reversing circuit of the first motor, and the second limit switch is closed by default; when the fixed plate moves to the second limit point, the second limit switch is opened;

[0029] The vertical motion control circuit further includes: a third limit switch and a fourth limit switch;

[0030] The third limit switch is arranged in the forward rotation circuit of the second motor, and the third limit switch is closed by default; when the second motor moves to the third limit position, the third limit switch is opened;

[0031] The fourth limit switch is arranged in the reversing circuit of the second motor, and the fourth limit switch is closed by default; when the second motor moves to the fourth limit position, the fourth limit switch is opened.

[0032] In a possible embodiment, the invention further includes: starting a protection circuit;

[0033] The start protection circuit is connected to the overhead travelling crane and is used for outputting an overhead travelling crane start signal to start the overhead travelling crane after the patrol protection instrument has finished patrolling the surrounding of the overhead travelling crane.

[0034] In a possible embodiment, the startup protection circuit includes: a patrol safety switch and a main contactor of the overhead travelling crane;

[0035] The patrol safety switch and the overhead crane main contactor are connected in series between the positive and negative electrodes of the power supply;

[0036] The patrol safety switch is used to close after the patrol protection device completes patrolling the periphery of the overhead crane.

[0037] In a possible embodiment, the startup protection circuit further includes: four self-sustaining switch circuits connected in parallel between the positive electrode and the negative electrode of the power supply;

[0038] The self-sustaining switch circuit includes: the first limit switch / the second limit switch / the third limit switch / the fourth limit switch, a first relay and a first relay contact; wherein the first relay contact is a normally open contact, and when the first relay is energized, the first relay contact is closed;

[0039] The first limit switch / the second limit switch / the third limit switch / the fourth limit switch are connected in series with the first relay and in parallel with the contact of the first relay;

[0040] Correspondingly, when all the first relay contacts are closed, the patrol safety switch is closed.

[0041] In a possible embodiment, the startup protection circuit further includes: a startup self-sustaining circuit connected to the positive electrode and the negative electrode of the power supply;

[0042] The startup self-sustaining circuit comprises: the first relay contact and the second relay of each of the self-sustaining switch circuits connected in series; wherein the second relay contact is a normally open contact, and when the second relay is energized, the second relay contact is closed;

[0043] Correspondingly, the patrol safety switch includes: the second relay contact.

[0044] In a possible embodiment, the patrol safety switch includes: four self-sustaining switch contacts connected in series;

[0045] Wherein, the self-sustaining switch contact is a normally open contact;

[0046] The four self-sustaining switch contacts are respectively contacts of four self-sustaining switches arranged on the control handle, and the four self-sustaining switches respectively correspond to the four movement directions of the rotating mechanism.

[0047] In a possible embodiment, the startup protection circuit further includes: a zero position protection switch, an emergency stop protection switch, a safety door protection switch and an overcurrent protection switch;

[0048] The zero position protection switch, the emergency stop protection switch, the safety door protection switch and the overcurrent protection switch are connected in series with the patrol safety switch and the overhead crane main contactor.

[0049] The patrol protection device provided by the utility model realizes the remote inspection of the crane operator in the cab by setting a camera on the outer side of the crane track and at the far end relative to the cab, and setting a monitor in the cab, so as to solve the problem of blurred vision caused by distance. At the same time, the operator in the cab can control the movement of the rotating mechanism through the control handle, so as to adjust the direction of the camera, expand the patrol range, and solve the problem of limited vision such as obstacles and blind spots in a single direction. At the same time, multiple perspectives also help the operator to no longer rely entirely on the command gestures of the commander when controlling the operation of the crane, and can assist in the control of the crane according to the remote perspective returned by the camera, so that the driving safety is more guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A structural diagram of a patrol protection device provided by the utility model;

[0052] Figure 2 A structural diagram of a rotating mechanism provided by the utility model;

[0053] Figure 3 A circuit diagram of a horizontal motion control circuit provided by the utility model;

[0054] Figure 4 A circuit diagram of a vertical motion control circuit provided by the utility model;

[0055] Figure 5 A circuit diagram of a startup protection circuit provided by the utility model;

[0056] Among them, 10 is a camera, 20 is a rotating mechanism, 21 is a fixed plate, 22 is a first motor, 23 is a second motor, 24 is a fixed frame, 30 is a monitor, 40 is a control handle, 50 is an overhead crane track, and 60 is a main hook. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0058] The core of the utility model is to provide a patrol protection device.

[0059] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] As a large-scale transport machinery, double (single) beam cranes (also known as overhead cranes) are widely used in various industrial production scenarios. However, due to the inherent properties of overhead cranes, when they are working, it should be ensured that there are no other people or objects in their movement path, otherwise people or objects may be damaged, causing serious safety problems.

[0061] At present, the main method is to conduct manual inspections before the crane is started. However, since the crane's track coverage is generally large, the cab can only be set at a certain place outside the crane track for safety reasons. This means that before starting, the operator can only roughly inspect the surrounding conditions of the crane track from the window set in the cab. There may be problems such as limited vision due to obstacles and blind spots, as well as blurred vision caused by distance, resulting in poor inspection results. In addition, the control of the crane at this time is completely dependent on command gestures, which may cause personal or property damage and other problems that seriously affect production safety.

[0062] In order to solve the above problems, the utility model provides a patrol protection device, such as Figure 1 As shown, it includes: a camera 10, a rotating mechanism 20, a monitor 30 and a control handle 40;

[0063] The rotating mechanism 20 is connected to the control handle 40 for communication, and the camera 10 is fixed on the rotating mechanism 20; the rotating mechanism 20 is used to adjust the direction of the camera 10 according to the control command sent by the control handle 40;

[0064] The rotating mechanism 20 is arranged outside the overhead crane track 50 and is located on the other side relative to the cab; the camera 10 is set to face the initial position of the overhead crane by default (furthermore, the default direction of the camera 10 can be set to the upper center position of the picture). Figure 1 The main hook 60 in the middle can meet the inspection requirements such as the state of the item being called and whether the lifting is crooked);

[0065] The camera 10 is connected to the monitor 30 for collecting image information and returning it to the monitor 30;

[0066] The monitor 30 is disposed in the cab and is used to display image information collected by the camera 10 .

[0067] The specific selection of the camera 10 is not strictly limited in this embodiment and should be determined according to the actual security inspection needs and other design needs. For example, the resolution or clarity of the camera 10 and the size of the field of view of the camera 10 are determined according to the size of the overhead traveling vehicle track 50. However, it should be noted that the field of view size requirement of the camera 10 can be compensated by the rotating mechanism 20, which can adjust the direction of the camera 10. At this time, the field of view of the camera 10 only needs to meet the field of view size required for one screen.

[0068] It should also be noted that in the patrol protection device provided by the present invention, the camera 10 is fixed at a certain point at the far end, and the direction of the camera 10 is changed by the rotating mechanism 20 to realize the patrol around the overhead crane (mainly the patrol at the far end, and the operator can realize the patrol at the near end by himself through the window in the cab). The reason why the patrol protection device does not adopt the solution of fixing the direction of the camera 10 and changing the position of the camera 10 by moving the track for patrol is that the setting of the camera 10 and its moving track itself may affect the driving safety of the overhead crane; and in scenes such as factories where the overhead crane is set up, where there is not much space, the additional space occupation should be reduced as much as possible; in addition, the cost and difficulty of laying tracks or moving the camera 10 by mechanical arms are generally higher than the method of adjusting the direction of the rotating mechanism 20 provided by the present invention, so the present invention does not adopt it. However, if there are other needs in actual applications, the above-mentioned method of expanding the patrol range of the camera 10 by moving the track and mechanical arms can also achieve the same safety patrol effect as the present invention.

[0069] The present invention does not impose strict restrictions on the specific structure and implementation of the rotating mechanism 20. Currently, there are many mature implementation schemes that can be freely selected according to actual needs. However, this embodiment further provides a possible implementation scheme of the rotating mechanism 20, such as Figure 2 As shown, the rotating mechanism 20 includes: a fixed plate 21, a first motor 22, a second motor 23 and a fixed frame 24;

[0070] Wherein, the camera 10 is fixed on the fixing plate 21;

[0071] The first motor 22 is connected to the shaft of the fixed plate 21, and the first motor 22 is used to drive the fixed plate 21 to move in the horizontal direction;

[0072] The second motor 23 is connected to the shaft of the first motor 22, and the first motor 22 is used to drive the first motor 22 to move in the vertical direction;

[0073] The second motor 23 is fixedly connected to a fixing frame 24 . The fixing frame 24 is disposed outside the overhead travelling vehicle track 50 and is located on the other side of the driving cab.

[0074] In this embodiment, the rotating mechanism 20 is fixedly connected to the camera 10 through the fixed plate 21; the horizontal movement of the camera 10 is achieved through the first motor 22, that is, the orientation adjustment of the camera 10 in the left and right directions is achieved; the vertical movement of the first motor 22 is achieved through the second motor 23, that is, the orientation adjustment of the camera 10 in the up and down directions is achieved; the position of the rotating mechanism 20 is fixedly set through the fixed frame 24, that is, the purpose of setting the camera 10 on the outside of the overhead crane track 50 and on the other side relative to the cab is achieved.

[0075] In this embodiment, the camera 10 can be adjusted in any direction by two motors, so that the patrol range is no longer limited to the field of view of the camera 10, which greatly improves the patrol effect and reliability of the security patrol device.

[0076] Further, based on the above embodiment, this embodiment also provides a possible implementation scheme for how the rotating mechanism 20 specifically realizes the control of rotation, and the rotating mechanism 20 further includes: a horizontal motion control circuit and a vertical motion control circuit;

[0077] Horizontal motion control circuit such as Figure 3 As shown, it includes: a first switch contact SB1, a second switch contact SB2 and a first capacitor C1;

[0078] The first switch contact SB1 and the second switch contact SB2 are contacts corresponding to the horizontal direction control switches on the control handle 40;

[0079] The first switch contact SB1 is arranged in the forward rotation circuit of the first motor 22. When the first switch contact SB1 is closed, the forward rotation circuit is turned on, and the first motor 22 rotates forward. The second switch contact SB2 is arranged in the reverse rotation circuit of the first motor 22. When the second switch contact SB2 is closed, the reverse rotation circuit is turned on, and the first motor 22 rotates reversely.

[0080] The two ends of the first capacitor C1 are respectively connected between the positive input terminal and the negative input terminal of the first motor 22;

[0081] The structure of the vertical motion control circuit is exactly the same as that of the horizontal motion control circuit. Figure 4 As shown, the vertical motion control circuit includes: a third switch contact SB3, a fourth switch contact SB4 and a second capacitor C2;

[0082] Among them, the third switch contact SB3 and the fourth switch contact SB4 are contacts corresponding to the vertical direction control switches on the control handle 40;

[0083] The third switch contact SB3 is arranged in the forward rotation circuit of the second motor 23. When the third switch contact SB3 is closed, the forward rotation circuit is turned on, and the second motor 23 rotates forward. The fourth switch contact SB4 is arranged in the reverse rotation circuit of the second motor 23. When the fourth switch contact SB4 is closed, the reverse rotation circuit is turned on, and the second motor 23 rotates reversely.

[0084] Two ends of the second capacitor C2 are respectively connected between the positive input terminal and the negative input terminal of the second motor 23 .

[0085] Since the structures of the horizontal motion control circuit and the vertical motion control circuit are exactly the same, the only difference is that they control different motors. Therefore, this embodiment takes the horizontal motion control circuit as an example to illustrate the principle and process of two motion control circuits controlling corresponding motors to achieve the direction adjustment of the camera 10:

[0086] If the first motor 22 rotates forward, Figure 2 In the left turn, when the first switch contact SB1 is closed, the first motor 22 is positively connected to the power supply, and the first motor 22 rotates forward, that is, drives the fixed disk 21 (camera 10) to rotate left; similarly, when the second switch contact SB2 is closed, the first motor 22 is reversely connected to the power supply, and the first motor 22 rotates reversely, that is, drives the fixed disk 21 (camera 10) to rotate right; the purpose of controlling the adjustment of the camera 10 in the horizontal direction is achieved.

[0087] In addition, it is easy to understand that the switch setting on the control handle 40 is adapted to the motion control circuit. Based on the motion control circuit provided in this embodiment, the control handle 40 should at least include a switch for controlling horizontal motion, which corresponds to the first switch contact SB1 and the second switch contact SB2, respectively, and a switch for controlling vertical motion, which corresponds to the third switch contact SB3 and the fourth switch contact SB4, respectively. Further, this embodiment provides a possible implementation scheme of the control handle 40:

[0088] A combination switch is provided on the control handle 40, and the combination switch is a cross combination switch with a self-resetting function; wherein the four ends of the cross combination switch correspond to the four directions of left, right, up and down, respectively, that is, they correspond to the above-mentioned first switch contact SB1, second switch contact SB2, third switch contact SB3, and fourth switch contact SB4, respectively; and the middle of the cross combination switch is the zero position, and when the cross combination switch returns to the zero position, all switch contacts are disconnected.

[0089] As can be seen from the above, this embodiment can realize the forward and reverse control of two motors based on two simple motion control circuits, and further combined with the rotating mechanism 20 structure provided in the above embodiment, the camera 10 can be adjusted in any direction, thereby expanding the security patrol range.

[0090] Furthermore, based on the motion control circuit provided in the above embodiment, this embodiment further provides a preferred implementation scheme, such as Figure 3 As shown, the horizontal motion control circuit also includes: a first limit switch XK1 and a second limit switch XK2;

[0091] The first limit switch XK1 is arranged in the forward rotation circuit of the first motor 22, and the first limit switch XK1 is closed by default; when the fixed plate 21 moves to the first limit point, the first limit switch XK1 is opened;

[0092] The second limit switch XK2 is arranged in the reverse loop of the first motor 22, and the second limit switch XK2 is closed by default; when the fixed plate 21 moves to the second limit point, the second limit switch XK2 is opened;

[0093] like Figure 4 As shown, the vertical motion control circuit also includes: a third limit switch XK3 and a fourth limit switch XK4;

[0094] The third limit switch XK3 is arranged in the forward rotation circuit of the second motor 23, and the third limit switch XK3 is closed by default; when the second motor 23 moves to the third limit position, the third limit switch XK3 is opened;

[0095] The fourth limit switch XK4 is arranged in the reversing circuit of the second motor 23, and the fourth limit switch XK4 is closed by default; when the second motor 23 moves to the fourth limit position, the fourth limit switch XK4 is opened.

[0096] That is, in this embodiment, the limit switch is also set to limit the direction adjustment range in the four directions of up, down, left, and right, so as to avoid excessive adjustment of the direction of the camera 10. Specifically, since the scenario targeted by the new use is that the safety patrol device replaces manual remote patrol, that is, the camera 10 is set on one side of the overhead traveling vehicle track 50. Figure 1 As shown, the camera 10 is only facing Figure 1 When the camera 10 is on the left side, it can be used for patrol. Figure 1 The right side of is meaningless.

[0097] Based on this, the embodiment sets the limit switches to limit the adjustment range of the camera 10 in the four directions of up, down, left, and right. Specifically, each limit switch can limit the adjustment range of 90°, that is, the four limit switches provided in the embodiment limit the adjustment range of the camera 10 to 180° in the horizontal and vertical directions, preventing excessive adjustment from causing failure to perform normal security inspections.

[0098] On the other hand, based on the patrol protection device provided in the above embodiment, reliable safety patrol before the start of the overhead crane can be realized. Accordingly, after the safety patrol is completed, the overhead crane should be started to complete the production task. In view of this, this embodiment also provides a possible implementation scheme, and the above safety patrol device also includes: a start protection circuit;

[0099] The starting protection circuit is connected to the overhead crane and is used for outputting an overhead crane starting signal to start the overhead crane after the patrol protection instrument has finished patrolling the surrounding of the overhead crane.

[0100] That is, in this embodiment, the confirmation of the completion of the safety inspection is realized by starting the protection circuit, and the starting of the overhead crane is allowed only after the safety inspection is completed, thereby further ensuring the safety of the starting of the overhead crane.

[0101] Based on the above embodiment, this embodiment also provides a specific implementation scheme of a startup protection circuit, the startup protection circuit includes: a patrol safety switch and a crown block main contactor KM1;

[0102] The patrol safety switch and the crane main contactor are connected in series between the positive and negative poles of the power supply (i.e. Figure 5 Between the live wire L1 and the neutral wire N);

[0103] The patrol safety switch is used to close after the patrol protection device completes patrolling around the overhead crane.

[0104] Furthermore, for the patrol safety switch in the above startup protection circuit, the utility model provides two possible implementation schemes:

[0105] 1. The patrol safety switch includes: four self-sustaining switch contacts connected in series;

[0106] Among them, the self-sustaining switch contacts are normally open contacts;

[0107] The four self-sustaining switch contacts are respectively the contacts of four self-sustaining switches arranged on the control handle 40 , and the four self-sustaining switches correspond to the four movement directions of the rotating mechanism 20 .

[0108] That is, in this embodiment, the operator adjusts the direction of the camera 10 by the control handle 40 through the self-holding switch additionally provided on the control handle 40 and determines that the safety inspection is completed, and then presses the self-holding switch to close the corresponding self-holding switch contacts. When all four self-holding switch contacts are closed, it means that the safety inspection is completed, and the inspection safety switch is closed.

[0109] 2. If Figure 5 As shown, the startup protection circuit also includes: four self-sustaining switch circuits connected in parallel between the positive and negative electrodes of the power supply;

[0110] The self-sustaining switch circuit includes: a first limit switch / a second limit switch / a third limit switch / a fourth limit switch, a first relay and a first relay contact (the first relay and its contact correspond to Figure 5 KA1, KA2, KA3, KA4); wherein the first relay contact is a normally open contact. When the first relay is energized, the first relay contact is closed;

[0111] The first limit switch / the second limit switch / the third limit switch / the fourth limit switch are connected in series with the first relay and in parallel with the contact of the first relay;

[0112] Correspondingly, when all first relay contacts are closed, the patrol safety switch is closed.

[0113] As can be seen from the above, this embodiment uses the closed state of the limit switch contacts to indicate whether the safety inspection work is completed. As can be seen from the above embodiments, the limit switch is used to limit the adjustment range of the camera 10 in any direction. Therefore, when a limit switch is triggered, it means that the adjustment of the camera 10 in this direction has reached the limit value, which means that the camera 10 has been fully inspected in this direction. When the limit switch is triggered once in all four directions, it means that the safety inspection work of the camera 10 is sufficient, and the inspection safety switch can be closed to allow the overhead crane to start.

[0114] In addition, since it is impossible for the four limit switches to be closed at the same time during the safety inspection process, this embodiment uses the first relay to achieve self-sustaining closure of the four limit switch contacts, thereby ensuring the normal operation of the inspection safety switch and allowing the overhead crane to start after the safety inspection work is completed.

[0115] Further, such as Figure 5 As shown, based on the above embodiment, this embodiment also provides a specific implementation scheme of a safety patrol switch:

[0116] The startup protection circuit also includes: connecting to the positive and negative poles of the power supply (i.e. Figure 5 A starting self-sustaining circuit between the live wire L1 and the neutral wire N);

[0117] The self-sustaining start circuit includes: a first relay contact and a second relay of a self-sustaining switch circuit connected in series; wherein the second relay contact is a normally open contact, and when the second relay is energized, the second relay contact is closed (the second relay and its contacts correspond to Figure 5 KA5 in ( );

[0118] Correspondingly, the patrol safety switch includes: a second relay contact.

[0119] It can be seen that this embodiment provides a self-sustaining circuit for the four first relay contacts in the above embodiment, and uses the second relay contact as a patrol safety switch, thereby achieving the purpose of closing the patrol safety switch after the four first relay contacts are closed.

[0120] Based on the self-sustaining function implemented by the relay in the above embodiment, the reset can be achieved by powering off, so as to prepare for the next safety inspection before the overhead crane is started.

[0121] Furthermore, in order to further improve the safety protection effect of the patrol protection device provided by the utility model before the overhead crane is started, this embodiment also provides a preferred implementation scheme, such as Figure 5 As shown, the startup protection circuit also includes: a zero position protection switch, an emergency stop protection switch, a safety door protection switch and an overcurrent protection switch;

[0122] The zero position protection switch, emergency stop protection switch, safety door protection switch and overcurrent protection switch are connected in series with the patrol safety switch and the overhead crane main contactor.

[0123] That is, in this embodiment, in addition to the above-mentioned safety inspection items, the circuit protection items in the overhead crane starting circuit are also incorporated into the overhead crane starting control. The overhead crane is allowed to start only when the safety inspection is completed and the safety door protection, overcurrent protection, emergency stop protection and zero protection of the starting circuit are normal, thereby ensuring the driving safety of the overhead crane to the greatest extent.

[0124] The above is a detailed introduction to a patrol protection device provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the utility model.

[0125] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A patrol protection device, characterized in that: include: A camera (10), a rotating mechanism (20), a monitor (30) and a control handle (40); The rotating mechanism (20) is communicatively connected with the control handle (40), and the camera (10) is fixed on the rotating mechanism (20); the rotating mechanism (20) is used to adjust the orientation of the camera (10) according to the control instruction sent by the control handle (40); The rotating mechanism (20) is arranged outside the overhead crane track (50) and is located on the other side relative to the driving cab; the camera (10) faces the initial position of the overhead crane by default; The camera (10) is connected to the monitor (30) for collecting image information and returning it to the monitor (30); The monitor (30) is arranged in the cab and is used to display the image information collected by the camera (10).

2. The patrol protection device according to claim 1, characterized in that: The rotating mechanism (20) comprises: a fixed disk (21), a first motor (22), a second motor (23) and a fixed frame (24); Wherein, the camera (10) is fixed on the fixing plate (21); The first motor (22) is connected to the shaft of the fixed disk (21), and the first motor (22) is used to drive the fixed disk (21) to move in a horizontal direction; The second motor (23) is connected to the shaft of the first motor (22), and the first motor (22) is used to drive the first motor (22) to move in a vertical direction; The second motor (23) is fixedly connected to the fixing frame (24), and the fixing frame (24) is arranged on the outside of the overhead travelling vehicle track (50) and is located on the other side relative to the driving cab.

3. The patrol protection device according to claim 2, characterized in that: The rotating mechanism (20) further comprises: a horizontal motion control circuit and a vertical motion control circuit; The horizontal motion control circuit comprises: a first switch contact, a second switch contact and a first capacitor; Wherein, the first switch contact and the second switch contact are contacts corresponding to the horizontal direction control switches on the control handle (40); The first switch contact is arranged in a forward rotation circuit of the first motor (22); when the first switch contact is closed, the forward rotation circuit is turned on, and the first motor (22) rotates forward; the second switch contact is arranged in a reverse rotation circuit of the first motor (22); when the second switch contact is closed, the reverse rotation circuit is turned on, and the first motor (22) rotates reversely; The two ends of the first capacitor are respectively connected between the positive input terminal and the negative input terminal of the first motor (22); The vertical motion control circuit comprises: a third switch contact, a fourth switch contact and a second capacitor; Wherein, the third switch contact and the fourth switch contact are contacts corresponding to the vertical direction control switches on the control handle (40); The third switch contact is arranged in the forward rotation circuit of the second motor (23); when the third switch contact is closed, the forward rotation circuit is turned on, and the second motor (23) rotates forward; the fourth switch contact is arranged in the reverse rotation circuit of the second motor (23); when the fourth switch contact is closed, the reverse rotation circuit is turned on, and the second motor (23) rotates reversely; The two ends of the second capacitor are respectively connected between the positive input terminal and the negative input terminal of the second motor (23).

4. The patrol protection device according to claim 3, characterized in that: The horizontal motion control circuit further includes: a first limit switch and a second limit switch; The first limit switch is arranged in the forward rotation circuit of the first motor (22), and the first limit switch is closed by default; when the fixed disk (21) moves to the first limit point, the first limit switch is opened; The second limit switch is arranged in the reversing circuit of the first motor (22), and the second limit switch is closed by default; when the fixed disk (21) moves to the second limit point, the second limit switch is opened; The vertical motion control circuit further includes: a third limit switch and a fourth limit switch; The third limit switch is arranged in the forward rotation circuit of the second motor (23), and the third limit switch is closed by default; when the second motor (23) moves to the third limit point, the third limit switch is opened; The fourth limit switch is arranged in the reversing circuit of the second motor (23), and the fourth limit switch is closed by default; when the second motor (23) moves to the fourth limit position, the fourth limit switch is opened.

5. The patrol protection device according to claim 4, characterized in that: Also includes: Start protection circuit; The start protection circuit is connected to the overhead travelling crane and is used for outputting an overhead travelling crane start signal to start the overhead travelling crane after the patrol protection instrument has finished patrolling the surrounding of the overhead travelling crane.

6. The patrol protection device according to claim 5, characterized in that: The startup protection circuit includes: a patrol safety switch and a main contactor of the overhead travelling crane; The patrol safety switch and the overhead crane main contactor are connected in series between the positive and negative electrodes of the power supply; The patrol safety switch is used to close after the patrol protection device completes patrolling the periphery of the overhead crane.

7. The patrol protection device according to claim 6, characterized in that: The startup protection circuit also includes: four self-sustaining switch circuits connected in parallel between the positive and negative electrodes of the power supply; The self-sustaining switch circuit includes: the first limit switch / the second limit switch / the third limit switch / the fourth limit switch, a first relay and a first relay contact; wherein the first relay contact is a normally open contact, and when the first relay is energized, the first relay contact is closed; The first limit switch / the second limit switch / the third limit switch / the fourth limit switch are connected in series with the first relay and in parallel with the contact of the first relay; Correspondingly, when all the first relay contacts are closed, the patrol safety switch is closed.

8. The patrol protection device according to claim 7, characterized in that: The startup protection circuit also includes: a startup self-sustaining circuit connected to the positive and negative electrodes of the power supply; The startup self-sustaining circuit comprises: the first relay contact and the second relay of each of the self-sustaining switch circuits connected in series; wherein the second relay contact is a normally open contact, and when the second relay is energized, the second relay contact is closed; Correspondingly, the patrol safety switch includes: the second relay contact.

9. The patrol protection device according to claim 6, characterized in that: The patrol safety switch comprises: four self-sustaining switch contacts connected in series in sequence; Wherein, the self-sustaining switch contact is a normally open contact; The four self-sustaining switch contacts are respectively contacts of four self-sustaining switches arranged on the control handle (40), and the four self-sustaining switches respectively correspond to the four movement directions of the rotating mechanism (20).

10. The patrol protection device according to any one of claims 6 to 9, characterized in that: The startup protection circuit also includes: a zero position protection switch, an emergency stop protection switch, a safety door protection switch and an overcurrent protection switch; The zero position protection switch, the emergency stop protection switch, the safety door protection switch and the overcurrent protection switch are connected in series with the patrol safety switch and the overhead crane main contactor.

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