A bidirectional partner power supply system and method for a rubber-tyred container gantry crane

Abstract

The application provides a bidirectional partner power supply system and method for a rubber-tyred container gantry crane, wherein the power supply system comprises a power supply and receiving integrated device arranged on the rubber-tyred container gantry crane and an emergency power supply cable used for connecting the power supply and receiving integrated device. The power supply and receiving integrated device controls the contactor KM101 contact to be connected or disconnected through an internal logic control loop, so that the external circuit is connected or disconnected with the main circuit of the rubber-tyred container gantry crane. The emergency power supply cable can be quickly connected to the power supply and receiving integrated device through the high-power plugs at both ends of the cable, so that the main circuit of one rubber-tyred container gantry crane is connected with another rubber-tyred container gantry crane, power supply and automatic power receiving are realized, and the sharing purpose of the power supply is achieved. The system provided by the application still has perfect safety design even when being remotely controlled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of crane power supply, in particular to a bidirectional partner power supply system and method for a rubber-tyred container gantry crane. BACKGROUND

[0002] A rubber-tyred gantry crane (RTG) has the feature of being self-powered and can be moved to different yards for loading and unloading operations at any time, which is highly flexible. However, power failure is an inevitable problem in the actual application of RTG. Once it occurs, it is difficult to solve, and the RTG will be unable to move, which affects the operation efficiency of the RTG. In particular, when the RTG is in the process of lifting a container and the lifted container is in the center of the surrounding multi-layer containers, the following methods are usually used to solve the problem: 1. Repair the power supply, repair the engine for engine power supply, repair the slide wire for slide wire power supply, which takes a long time and cannot be repaired in a short time, seriously affecting normal production and operation. If it happens during loading, all containers under the RTG cannot be loaded on time, causing the containers to miss the shipment period, resulting in huge losses. The port company needs to compensate for the loss, which will be very large. 2. Manually lower the lifted container, and a person risks climbing onto the container and the container spreader to remove all locks and disconnect the container spreader from the lifted container. After the person climbs down the container, several workers turn the winch mechanism to wind up the steel wire and lift the disconnected spreader above the surrounding stacked containers. Then use two high-power loaders or forklifts to push the two legs of the RTG apart from the failure site, and another RTG with a good power supply replaces the failed RTG to continue operation. This method takes a long time, has great safety risks, and has many uncertain factors, which also has the possibility of compensation for missing the shipment period. The existing methods are complex to operate, have great safety risks, and cannot quickly solve the power failure problem caused by the power failure of the RTG. During the process of handling the failure of the failed RTG, the normal shipment of the containers around the failed RTG will also be affected, causing the shipment period to be delayed, and even the normal production and operation of the port area cannot be carried out, resulting in great production losses. Therefore, the existing power supply system and method are complex to operate and cannot quickly solve the power failure problem caused by the power failure of the RTG. SUMMARY

[0003] Therefore, the present application aims to provide a bidirectional partner power supply system and method for a rubber-tyred container gantry crane to solve the power failure problem caused by the power failure of the RTG.

[0004] To achieve the above object, the technical scheme of the present application is as follows:

[0005] First aspect

[0006] The embodiment of the present application provides a bidirectional partner power supply system for a rubber-tyred container gantry crane, comprising a power supply and receiving integrated device arranged on the rubber-tyred container gantry crane, and an emergency power supply cable used for connecting the power supply and receiving integrated device; the power supply and receiving integrated device is connected with the main circuit of the rubber-tyred container gantry crane through an electric control switch KM101, and a control loop for controlling the on-off of the electric control switch KM101 is arranged in the power supply and receiving integrated device; the emergency power supply cable is detachably arranged on the power supply and receiving integrated device, and when the emergency power supply cable is disconnected from the power supply and receiving integrated device, the control loop controls the electric control switch KM101 to disconnect the power supply and receiving integrated device from the main circuit of the rubber-tyred container gantry crane.

[0007] Second aspect

[0008] The embodiment of the present application further provides a bidirectional partner power supply method for a rubber-tyred container gantry crane, comprising the following steps:

[0009] Arranging a power supply and receiving integrated device on the rubber-tyred container gantry crane;

[0010] Connecting the power supply and receiving integrated devices on two rubber-tyred container gantry cranes by using an emergency power supply cable, and supplying power to the main circuit of at least one of the rubber-tyred container gantry cranes;

[0011] In the power supply state, when the main circuit of one rubber-tyred container gantry crane is powered and the main circuit of the other rubber-tyred container gantry crane is powered off, the control loops of the power supply and receiving integrated devices on the two rubber-tyred container gantry cranes control the electric control switch KM101 to be closed, so that the power supply and receiving integrated devices on the two rubber-tyred container gantry cranes are connected with the main circuits of the corresponding rubber-tyred container gantry cranes, the power supply and receiving integrated device on the powered rubber-tyred container gantry crane is switched to a power supply mode, and the power supply and receiving integrated device on the powered-off rubber-tyred container gantry crane is switched to a power receiving mode, so as to realize power supply from the main circuit of the powered rubber-tyred container gantry crane to the main circuit of the powered-off rubber-tyred container gantry crane;

[0012] When the main circuits of the two rubber-tyred container gantry cranes are powered, the control loops of the power supply and receiving integrated devices on the two rubber-tyred container gantry cranes control the electric control switch KM101 to be disconnected, so that the connection between the power supply and receiving integrated devices and the main circuits of the rubber-tyred container gantry cranes is disconnected;

[0013] When the emergency power cable is disconnected from the power supply and receiving integrated device of any one of the connected tire type container gantry crane, the power supply and receiving integrated device control loop controls the electric control switch KM101 to be disconnected, so that the connection between the power supply and receiving integrated device and the main circuit of the tire type container gantry crane is disconnected.

[0014] Third aspect

[0015] The embodiment of the application also provides a power supply and receiving integrated device, which comprises a device body and a control loop arranged in the device body, wherein the control loop comprises linked normally open power supply button switches SB101 and SB102, linked normally closed power-off button switches SB201 and SB202, a power supply switch SA102, a power supply switch SA304, a power receiving switch SA506, a power receiving switch SA708, a power supply detection relay KA1, a power receiving detection relay KA2, a power supply delay relay KT1, a relay KA3, a main circuit relay KM1, detection limit switches LS1 and LS2, a power supply indicating lamp D1, a power receiving indicating lamp D2, control transformers T1 and T2, control interlocking ends S1 and S2, power supply lines LA, LB and LC, and a grounding line PE.

[0016] The power supply line LA is connected with the three-phase power supply line L1 of the main circuit of the tire type container gantry crane, the power supply line LB is connected with the three-phase power supply line L2 of the main circuit of the tire type container gantry crane, the power supply line LC is connected with the three-phase power supply line L3 of the main circuit of the tire type container gantry crane, the grounding line PE is connected with the grounding line of the three-phase power supply line of the main circuit of the tire type container gantry crane, and the electric control switch KM101 is arranged between the power supply line LA and the three-phase power supply line L1, between the power supply line LB and the three-phase power supply line L2, and between the power supply line LC and the three-phase power supply line L3, and the electric control switch KM101 is controlled to be turned on and turned off by the main circuit relay KM1.

[0017] The one end of the primary coil of the control transformer T1 is connected with the three-phase power supply line L1 of the main circuit of the rubber-tyred container gantry crane, and the other end is connected with the three-phase power supply line L3 of the main circuit of the rubber-tyred container gantry crane. The two ends of the power transmission detection relay KA1 are connected with the two ends of the secondary coil of the control transformer T1. The one end of the secondary coil of the control transformer T1 is connected with the control interlocking end S2 in sequence through the power transmission switch SA102, the normally open power transmission button switch SB101, the normally closed contact KA202 of the power transmission detection relay KA2, the normally closed power-off button switch SB201, the power transmission delay relay KT1, the detection limit switch LS2, the normally closed delay opening contact KT103 of the power transmission delay relay KT1, the normally open contact KA204 of the power transmission detection relay KA2, and the normally closed power-off button switch SB202.

[0018] The normally open contact KT101 of the power transmission delay relay KT1 is arranged between the normally closed contact KA202 of the power transmission detection relay KA2 and the normally closed power-off button switch SB201. The one end of the normally open contact KT101 is connected with the normally closed power-off button switch SB201 or the normally closed contact KA202, and the other end is connected with the secondary coil of the control transformer T1 through the power transmission switch SA102.

[0019] The power transmission indicating lamp D1 is arranged between the normally closed power-off button switch SB201 and the power transmission delay relay KT1. The one end of the power transmission indicating lamp D1 is connected with the normally closed power-off button switch SB201 or the power transmission delay relay KT1, and the other end is connected with the control interlocking end S2 in sequence through the normally open contact KA204 of the power transmission detection relay KA2 and the normally closed power-off button switch SB202. The normally open power transmission button switch SB102 is arranged between the power transmission indicating lamp D1 and the normally open contact KA204 of the power transmission detection relay KA2. The one end of the normally open power transmission button switch SB102 is connected with the power transmission indicating lamp D1, and the other end is connected with the control interlocking end S2 in sequence through the normally open contact KT104 of the power transmission delay relay KT1, the normally open contact KA204 of the power transmission detection relay KA2, and the normally closed power-off button switch SB202.

[0020] The normally open contact KA203 of the power transmission detection relay KA2 is arranged between the detection limit switch LS2 and the normally closed delay opening contact KT103 of the power transmission delay relay KT1. The one end of the normally open contact KA203 is connected with the detection limit switch LS2 or the normally closed delay opening contact KT103, and the other end is connected with the control interlocking end S1 through the detection limit switch LS1.

[0021] The one end of the primary coil of the control transformer T2 is connected with the power supply line LA, and the other end is connected with the power supply line LC. The two ends of the power supply detection relay KA2 are connected with the two ends of the secondary coil of the control transformer T2. The one end of the secondary coil of the control transformer T2 is connected with the control interlocking end S2 in sequence through the power receiving switch SA506, the normally open contact KA201 of the power supply detection relay KA2, the normally closed contact KA101 of the power supply detection relay KA1, the relay KA3, the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202. The two ends of the relay KA3 are connected in parallel with the power receiving indicator D2. The other end of the secondary coil of the control transformer T2 is connected with the control interlocking end S2 in sequence through the power receiving switch SA708, the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202.

[0022] The one end of the main circuit relay KM1 is provided with the normally open contact KT102 of the power supply delay relay KT1 and the normally open contact KA301 of the relay KA3. The other end of the main circuit relay KM1 is connected with the control interlocking end S2 in sequence through the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202. The one end of the normally open contact KT102 is connected with the main circuit relay KM1. The other end of the normally open contact KT102 is connected with the secondary coil of the control transformer T1 through the power supply switch SA102. The one end of the normally open contact KA301 is connected with the main circuit relay KM1. The other end of the normally open contact KA301 is connected with the secondary coil of the control transformer T2 through the power receiving switch SA506.

[0023] The normally closed contact KA101 is controlled by the power supply detection relay KA1 to be turned on or off. The normally open contact KA201, the normally closed contact KA202, the normally open contact KA203, and the normally open contact KA204 are controlled by the power supply detection relay KA2 to be turned on or off. The normally open contact KT101, the normally open contact KT102, the normally closed delay contact KT103, and the normally open contact KT104 are controlled by the power supply delay relay KT1 to be turned on or off. The normally open contact KA301 is controlled by the relay KA3 to be turned on or off.

[0024] Further, the power supply and power receiving integrated device further comprises a socket arranged on the device body, and a limit detector is arranged on the device body at a position corresponding to the socket.

[0025] The socket is provided with connecting sockets connected with the control interlocking end S1, the control interlocking end S2, the power supply line LA, the power supply line LB, the power supply line LC, and the grounding line PE respectively. The emergency power supply cable comprises a power supply cable, and the two ends of the power supply cable are provided with plugs matched with the socket. The plugs are provided with pins matched with the connecting sockets.

[0026] The limit detector for detecting the matching condition of the plug and the socket is arranged corresponding to the socket, the detection limit switch LS1 and the detection limit switch LS2 are connected with the limit detector to realize the control of the limit detector on the on-off of the detection limit switch LS1 and the detection limit switch LS2; when the limit detector detects that the plug is matched with the socket, the limit detector controls the detection limit switch LS1 and the detection limit switch LS2 to be closed, otherwise, the limit detector controls the detection limit switch LS1 and the detection limit switch LS2 to be opened.

[0027] Further, the power supply and receiving integrated device further comprises a power supply and receiving selection switch for controlling the on-off of the power supply switch SA102, the power supply switch SA304, the power receiving switch SA506 and the power receiving switch SA708, so that when the power supply switch SA102 and the power supply switch SA304 are closed, the power receiving switch SA506 and the power receiving switch SA708 are opened, and when the power supply switch SA102 and the power supply switch SA304 are opened, the power receiving switch SA506 and the power receiving switch SA708 are closed; the power supply and receiving selection switch is arranged on the device body.

[0028] Compared with the prior art, the bidirectional partner power supply system and method for the tire type container gantry crane has the following advantages:

[0029] The application provides a bidirectional partner power supply system and method for a tire type container gantry crane, which can realize power supply from one RTG to another RTG by connecting the power supply system of one RTG with another RTG through a power supply and receiving integrated device and an emergency power supply cable, and the two RTGs sharing the power supply can perform parallel operation and alternating low-speed operation, and the trolley can also perform low-speed accompanying walking; the power supply and receiving integrated device is arranged on the RTG, and the power supply and receiving integrated devices on the two RTGs are connected through the emergency power supply cable, the power supply and receiving integrated device on each RTG can be a power supply device or a power receiving device, and an operator only needs to adjust the power supply and receiving integrated device to different working modes to realize power supply from the powered RTG to the power failure RTG, so that the operation is simple, the difficulty of restoring power supply of the power failure RTG is reduced, and the power supply system and method have the characteristics of quick operation and quick response.

[0030] The system provided by the application has perfect safety design even when remote control is performed: firstly, the power connector can be plugged in and unplugged without electricity in any state; secondly, the power supply and receiving integrated device can immediately stop power supply to the outside when the emergency power supply cable is disconnected by external force, so that accidents are avoided; and thirdly, even if two normal tire type gantry cranes are connected together, the power supply line is not connected, and even if forced power supply mode is used, the power supply line is not connected, so that safety is guaranteed. Attached Figure Description

[0031] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is a schematic diagram of the bidirectional partner power supply system for a tire-mounted container gantry crane according to Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the integrated power supply and receiving device according to Embodiment 3 of the present invention;

[0034] Figure 3 This is a circuit diagram of the integrated power supply and receiving device described in Embodiment 3 of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the integrated power supply and receiving device described in Embodiment 3 of the present invention when connected to an emergency power supply cable;

[0036] Figure 5 This is a schematic diagram of the emergency power supply cable described in Embodiment 3 of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Power supply and receiving integrated device; 2. Emergency power supply cable; 3. Socket; 4. Device body; 5. Power supply cable; 6. Plug; 7. Limit detector; 8. First linkage switch; 9. Power supply and receiving selection switch; 10. Second linkage switch. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0040] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0041] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0042] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0043] Embodiment one

[0044] Figure 1 The structure diagram of a bidirectional partner power supply system for a rubber-tyred container gantry crane according to the first embodiment of the present application is shown in Figure 1 , comprising a power supply and receiving integrated device 1 provided on a rubber-tyred container gantry crane, and an emergency power supply cable 2 for connecting the power supply and receiving integrated device 1; the power supply and receiving integrated device 1 is connected with the main circuit of the rubber-tyred container gantry crane through an electric control switch KM101, and the power supply and receiving integrated device 1 is provided with a control circuit for controlling the on-off of the electric control switch KM101; the emergency power supply cable 2 is detachably mounted on the power supply and receiving integrated device 1, and when the emergency power supply cable 2 is disconnected from the power supply and receiving integrated device 1, the control circuit controls the electric control switch KM101 to disconnect the connection between the power supply and receiving integrated device 1 and the main circuit of the rubber-tyred container gantry crane.

[0045] Exemplary, the emergency power cable 2 can be quickly connected to the power supply and receiving integrated device 1 through the high-power plug at both ends of the power supply cable, realizing the main circuit connection of one wheel type gantry crane and another wheel type gantry crane, power supply and automatic power receiving, achieving the purpose of power sharing, and the system has perfect safety protection design.

[0046] In actual application process, the tire type container gantry crane is abbreviated as RTG, and the following is abbreviated as RTG to indicate the tire type container gantry crane. By connecting the power supply and receiving integrated device 1 on two RTGs through an emergency power cable 2, the two RTGs can share the power supply of one RTG. At this time, the power supply and receiving integrated device 1 on the powered RTG is a power supply device for outputting power, and the power supply and receiving integrated device 1 on the powered-off RTG is a power receiving device for outputting receiving power, so as to realize the power supply of the powered RTG to the other powered-off RTG.

[0047] When one RTG supplies power to another RTG, whether the high-power plug of the power supply and receiving integrated device 1 is disconnected from the socket, or the high-power plug of the power supply and receiving integrated device 1 is disconnected from the socket, or the emergency power cable 2 is disconnected, the main circuit of the power supply RTG and the power supply and receiving integrated device 1 are disconnected, the power supply is cut off, and the safety of the equipment and personnel is protected.

[0048] In actual application process, the power supply and receiving integrated device 1 can be arranged at the leg of each RTG for easy operation. When used, the power supply and receiving integrated device 1 of two RTGs is connected through the high-power plug and socket of the matched emergency power cable 2, and the power supply cable is suspended on the RTG structure. The power supply and receiving integrated device 1 on the power supply RTG is started to supply power, and the power supply and receiving integrated device 1 on the powered-off RTG is automatically connected to receive power. At this time, the main circuits of the two RTGs have power, and the power supply of one RTG is used. The two RTGs can be used for accompanying running or low-speed emergency cross operation to realize the rapid recovery operation of the fault RTG and ensure the rapid recovery of normal operation.

[0049] Embodiment two

[0050] The embodiment two of the present application provides a bidirectional partner power supply method for a tire type container gantry crane, comprising:

[0051] Step S1, a power supply and receiving integrated device is arranged on the tire type container gantry crane;

[0052] Step S2, the power supply and receiving integrated devices on two tire type container gantries are connected by an emergency power cable, and at least one main circuit of the tire type container gantry is powered;

[0053] When one of the main circuits of the two RTGs is powered and the other is not, the power supply and receiving integrated device control loop of the two RTGs controls the electric control switch KM101 to be closed, so that the power supply and receiving integrated device of the two RTGs is connected with the main circuit of the corresponding RTG, the power supply and receiving integrated device of the powered RTG is switched to the power supply mode, and the power supply and receiving integrated device of the unpowered RTG is switched to the power receiving mode (the default state, i.e., the power supply and receiving integrated device is in the power receiving mode by default), so as to realize power supply from the main circuit of the powered RTG to the main circuit of the unpowered RTG.

[0054] When both of the main circuits of the two RTGs are powered, the power supply and receiving integrated device control loop of the two RTGs controls the electric control switch KM101 to be opened, so that the connection between the power supply and receiving integrated device and the main circuit of the RTG is disconnected.

[0055] When the emergency power supply cable is disconnected from the power supply and receiving integrated device of any one of the RTGs, the power supply and receiving integrated device control loop controls the electric control switch KM101 to be opened, so that the connection between the power supply and receiving integrated device and the main circuit of the RTG is disconnected.

[0056] In actual application, the RTG emergency bidirectional partner power supply system can be operated by the following method.

[0057] The RTG installed with the power supply and receiving integrated device can automatically receive the commercial power of the power supply system of the maintenance site or the yard through the high-power socket of the power supply and receiving integrated device to perform production operation. When the RTG generator system or the battery system fails or the commercial power of the maintenance site or the yard power supply system fails, the RTG loses power supply. At this time, the RTG may be in the state of hoisting a container in urgent need of processing or running a large vehicle in urgent need of transfer. At this time, only a RTG with a normal power system needs to run over, and the power supply and receiving integrated devices of the two RTGs are quickly connected by an emergency power cable. The power supply and receiving integrated device of the RTG with a normal power system is switched to the "power supply mode" (i.e., the power supply switch SA102 and the power supply switch SA304 are closed, and the power receiving switch SA506 and the power receiving switch SA708 are disconnected), and the "normally open power supply button switch SB101 and SB102" are closed to supply power. The RTG with a damaged power system keeps the selection switch of the power supply and receiving integrated device in the "power receiving mode" (i.e., the power supply switch SA102 and the power supply switch SA304 are disconnected, and the power receiving switch SA506 and the power receiving switch SA708 are closed). The power supply and receiving integrated device automatically realizes power supply when the power supply and receiving integrated device supplies power. At this time, the two RTGs can cross and intermittently perform emergency operation and accompanying emergency transfer of the vehicle.

[0058] The working principle of the RTG emergency bidirectional partner power supply system is that the power supply and receiving integrated devices of the two RTGs are connected by an emergency power cable, and one RTG supplies power to the other RTG. The emergency power cable of the power supply and receiving integrated device is both a power supply cable and a power receiving cable, and the function change is selected by the power supply and receiving selection switch of the power supply and receiving integrated device to select the working mode, so that the power supply and receiving integrated device can be switched to power supply or power receiving.

[0059] Embodiment Three

[0060] Figure 2 The structure diagram of the power supply and receiving integrated device according to Embodiment Three of the application is shown in the figure, Figure 3 The circuit principle diagram of the power supply and receiving integrated device according to Embodiment Three of the application is shown in the figure, Figure 2 and Figure 3As shown, the power supply and receiving integrated device 1 includes a device body 4, and a control circuit provided in the device body 4, the control circuit including linked normally open power supply button switches SB101 and SB102, linked normally closed power-off button switches SB201 and SB202, a power supply switch SA102, a power supply switch SA304, a power receiving switch SA506, a power receiving switch SA708, a power supply detection relay KA1, a power receiving detection relay KA2, a power supply delay relay KT1, a relay KA3, a main circuit relay KM1, detection limit switches LS1 and LS2, a power supply indicator lamp D1, a power receiving indicator lamp D2, control transformers T1 and T2, control interlocking ends S1 and S2, power supply lines LA, LB and LC, and a ground line PE;

[0061] The power supply line LA is connected with the three-phase power supply line L1 of the main circuit of the rubber-tyred container gantry crane, the power supply line LB is connected with the three-phase power supply line L2 of the main circuit of the rubber-tyred container gantry crane, the power supply line LC is connected with the three-phase power supply line L3 of the main circuit of the rubber-tyred container gantry crane, the ground line PE is connected with the ground line of the three-phase power supply line of the main circuit of the rubber-tyred container gantry crane, and an electric control switch KM101 is arranged between the power supply line LA and the three-phase power supply line L1, between the power supply line LB and the three-phase power supply line L2, and between the power supply line LC and the three-phase power supply line L3, and the electric control switch KM101 is controlled by the main circuit relay KM1 to be turned on or off.

[0062] One end of the primary coil of the control transformer T1 is connected with the three-phase power supply line L1 of the main circuit of the rubber-tyred container gantry crane, and the other end is connected with the three-phase power supply line L3 of the main circuit of the rubber-tyred container gantry crane, the power supply detection relay KA1 is connected with the two ends of the secondary coil of the control transformer T1, one end of the secondary coil of the control transformer T1 is connected with the control interlocking end S2 in sequence through the power supply switch SA102, the normally open power supply button switch SB101, the normally closed contact KA202 of the power receiving detection relay KA2, the normally closed power-off button switch SB201, the power supply delay relay KT1, the detection limit switch LS2, the normally closed delay opening contact KT103 of the power supply delay relay KT1, the normally open contact KA204 of the power receiving detection relay KA2, and the normally closed power-off button switch SB202, and the other end of the secondary coil of the control transformer T1 is connected with the control interlocking end S2 in sequence through the power supply switch SA304, the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power receiving detection relay KA2, and the normally closed power-off button switch SB202;

[0063] The normally closed contact KA202 of the power-on detection relay KA2 and the normally closed power-off button switch SB201 are provided with the normally open contact KT101 of the power-on delay relay KT1, one end of the normally open contact KT101 is connected with the normally closed power-off button switch SB201 or the normally closed contact KA202, and the other end is connected with the secondary coil of the control transformer T1 through the power-on switch SA102;

[0064] The normally closed power-off button switch SB201 and the power-on delay relay KT1 are provided with the power-on indicating lamp D1, one end of the power-on indicating lamp D1 is connected with the normally closed power-off button switch SB201 or the power-on delay relay KT1, and the other end is connected with the control interlock end S2 through the normally open contact KA204 of the power-on detection relay KA2 and the normally closed power-off button switch SB202 in sequence; the power-on indicating lamp D1 and the normally open contact KA204 of the power-on detection relay KA2 are provided with the normally open power-on button switch SB102, one end of the normally open power-on button switch SB102 is connected with the power-on indicating lamp D1, and the other end is connected with the control interlock end S2 through the normally open contact KT104 of the power-on delay relay KT1 and the normally open contact KA204 of the power-on detection relay KA2 and the normally closed power-off button switch SB202 in sequence;

[0065] The normally open contact KA203 of the power-on detection relay KA2 is provided between the limit detection switch LS2 and the normally closed delay-off contact KT103 of the power-on delay relay KT1, one end of the normally open contact KA203 is connected with the limit detection switch LS2 or the normally closed delay-off contact KT103, and the other end is connected with the control interlock end S1 through the limit detection switch LS1;

[0066] One end of the primary coil of the control transformer T2 is connected with the power supply line LA, and the other end is connected with the power supply line LC; the power-on detection relay KA2 is connected with the secondary coil of the control transformer T2 in parallel; one end of the secondary coil of the control transformer T2 is connected with the control interlock end S2 through the power reception switch SA506, the normally open contact KA201 of the power-on detection relay KA2, the normally closed contact KA101 of the power-on detection relay KA1, the relay KA3, the normally open contact KT104 of the power-on delay relay KT1, the normally open contact KA204 of the power-on detection relay KA2 and the normally closed power-off button switch SB202 in sequence, and the other end of the secondary coil of the control transformer T2 is connected with the control interlock end S2 through the power reception switch SA708, the normally open contact KT104 of the power-on delay relay KT1, the normally open contact KA204 of the power-on detection relay KA2 and the normally closed power-off button switch SB202 in sequence, wherein the relay KA3 is connected with the power reception indicating lamp D2 in parallel;

[0067] One end of the main circuit relay KM1 is provided with the normally open contact KT102 of the power-on delay relay KT1 and the normally open contact KA301 of the relay KA3, and the other end is connected with the control interlocking end S2 through the normally open contact KT104 of the power-on delay relay KT1, the normally open contact KA204 of the power-on detection relay KA2 and the normally closed power-off button switch SB202 in sequence; one end of the normally open contact KT102 is connected with the main circuit relay KM1, and the other end is connected with the secondary coil of the control transformer T1 through the power-on switch SA102; one end of the normally open contact KA301 is connected with the main circuit relay KM1, and the other end is connected with the secondary coil of the control transformer T2 through the power-on switch SA506;

[0068] The normally open contact KA201, the normally closed contact KA202, the normally open contact KA203 and the normally open contact KA204 are controlled by the power-on detection relay KA2; the normally open contact KA301 is controlled by the relay KA3.

[0069] For example, the normally open power-on button switches SB101 and SB102 can be controlled by the first linkage switch 8, and the normally closed power-off button switches SB201 and SB202 can be controlled by the second linkage switch 10. The first linkage switch 8 and the second linkage switch 10 can be installed on the device body 4, and other linkage control modes can also be used according to actual needs.

[0070] Figure 4 For the structure of the power supply and receiving integrated device in embodiment three connected with the emergency power supply cable, referring to Figure 4 The power supply and receiving integrated device 1 further comprises a high-power socket 3 arranged on the device body 4, and a limit detector 7 arranged on the device body 4 at a position corresponding to the socket 3.

[0071] The socket 3 is provided with connecting sockets connected with the control interlocking end S1, the control interlocking end S2, the power supply line LA, the power supply line LB, the power supply line LC and the grounding line PE respectively, and the emergency power supply cable 2 comprises a power supply cable 5, both ends of the power supply cable 5 are provided with plugs 6 capable of cooperating with the socket 3, and the plugs 6 are provided with plug pins capable of cooperating with the connecting sockets.

[0072] The limit detector 7 is arranged corresponding to the socket 3, and the detection limit switch LS1 and the detection limit switch LS2 are connected with the limit detector 7 to realize the control of the limit detector 7 to the on-off of the detection limit switch LS1 and the detection limit switch LS2; when the limit detector 7 detects that the plug 6 is matched with the socket 3 in place, the limit detector 7 controls the detection limit switch LS1 and the detection limit switch LS2 to be closed, otherwise controls the detection limit switch LS1 and the detection limit switch LS2 to be disconnected.

[0073] Exemplarily, the high-power socket 3 is respectively provided with a control end connecting bush connected with the control interlocking end S1 and the control interlocking end S2, a phase line end connecting bush connected with the power supply lines (LA, LB, LC), and a ground line end connecting bush connected with the ground line PE.

[0074] In actual application process, the three high-power phase line end connecting bushes provided on the socket 3 are respectively used for connecting the power supply lines LA, LB and LC, one ground line bush is used for connecting the ground line PE, and two small-power control end connecting bushes are respectively used for connecting the control interlocking ends S1 and S2. The control end connecting bush is shorter than the phase line end connecting bush and the ground line bush, and the control end connecting bush is disconnected before the phase line end connecting bush each time of plugging and unplugging, so as to realize the quick power-off of the power supply and power receiving integrated device 1, avoid the leakage accident of the power supply and power receiving integrated device 1, and be beneficial to further improve the safety of the system in actual application process.

[0075] Optionally, the socket 3 on the power supply and power receiving integrated device 1 can also adopt other types of quick connection type sockets 3, and the plug 6 can also adopt the quick connection type plug 6 matched with the socket 3 to realize the convenient connection and disassembly between the plug 6 and the socket 3, which is beneficial to reduce the assembly difficulty in actual use process and improve the recovery power supply speed of the fault RTG.

[0076] In practical application, the limit detector 7 and the limit switches LS1 and LS2 can adopt limit switches or proximity switches. The limit switches need to be in direct contact with the detection substance, and the proximity switches need to be close to the detection substance. The general detection range is generally 3-20 mm, which depends on the sensor. Those skilled in the art can also select appropriate limit detectors 7 and limit switches according to actual needs to realize the on-off control of the circuit. For example, two limit detectors 7 can also be installed on the device body 4, and the two limit detectors 7 are connected with the limit switches LS1 and LS2 respectively to realize the separate control of the on-off of the limit switches LS1 and LS2. Those skilled in the art can also set one or more limit detectors 7 on the device body 4 in other ways according to needs, as long as the detection of the plug 6 and the on-off control of the limit switches LS1 and LS2 can be realized.

[0077] Figure 5 For the structure diagram of the emergency power supply cable in embodiment three of the present application, see Figure 5 The emergency power supply cable 2 includes a power cable 5 with three-phase four-wire and two control lines. The power cable 5 is provided with a plug 6 at both ends, which can cooperate with the high-power socket 3 of the power supply and reception integrated device 1. The plug 6 is provided with plug pins matched with the connection sockets of the socket 3.

[0078] In practical application, the plug 6 is provided with three high-power phase line pins of power line LA, power line LB and power line LC matched with the socket 3, a ground pin matched with the connection socket of the ground line PE on the socket 3, and two small-power control interlocking end pins matched with the control interlocking end S1 and control interlocking end S2 on the socket 3. The control interlocking end pins are shorter than the phase line pins. The socket 3 is correspondingly provided with connection sockets matched with the pins. The corresponding power cable is provided with wires for connecting each pin at both ends of the power cable 5, so that the same pins on the plugs 6 at both ends of the cable are connected by the same wire. Those skilled in the art can also select other forms of socket 3 and plug 6 according to actual needs, as long as the cooperation of the plug 6 and the socket 3 can be realized, and the conduction of each wiring end on the two power supply and reception integrated devices 1 can be realized. Here, it is not described in detail.

[0079] Optionally, the power supply and reception integrated device 1 further includes a power transmission and reception selection switch 9 for controlling power transmission and reception. For example, the power transmission and reception selection switch 9 can adopt an existing two-grade selection switch. When the rotary power transmission and reception selection switch 9 is in the power transmission mode, the selection switch contact 1 and the contact 2 are closed (i.e. the power transmission switch SA102 is closed), the contact 3 and the contact 4 are closed (i.e. the power transmission switch SA304 is closed), the contact 5 and the contact 6 are disconnected (i.e. the power reception switch SA506 is disconnected), and the contact 7 and the contact 8 are disconnected (i.e. the power reception switch SA708 is disconnected).

[0080] like Figure 3 As shown, when the rotary power supply / receiver selector switch 9 is in the receiving mode, contact 1 and contact 2 are open (i.e., power supply switch SA102 is open), contact 3 and contact 4 are open (i.e., power supply switch SA304 is open); contact 5 and contact 6 are closed (i.e., receiving switch SA506 is closed), and contact 7 and contact 8 are closed (i.e., receiving switch SA708 is closed). Those skilled in the art can also select a rotary switch or a multi-position switch according to actual needs to achieve control of power supply and receiving on SA.

[0081] The principle behind the power receiving function of this integrated power supply and receiving device is as follows:

[0082] When the power supply and receiving device's power selection switch 9 is selected to "Power Receiving Mode (Normal Position, i.e., selector switch SA contacts 1 and 2 are open, contacts 3 and 4 are open; contacts 5 and 6 are closed, and contacts 7 and 8 are closed)", during a power outage, when the RTG power supply and receiving device 1 is connected to the power supply via emergency power cable 2 or when the power supply and receiving device 1 on the powered RTG is connected, after the power supply lines LA, LB, and LC on the main power supply circuit are energized, the "control transformer T2" steps down the voltage to the control voltage, and the "power supply detection relay KA2" in the control circuit is energized. The various contacts controlled by the "power supply relay KA2" then operate (i.e., normally open contact K...). (A201, KA203, and KA204 are closed, and the normally closed contact KA202 is open). Since the RTG main circuit is not powered at this time, the "power receiving detection relay KA1" is not energized. The normally closed contact KA101 controlled by the "power receiving detection relay KA1" remains normally closed. The "relay KA3" is energized, and the normally open contact KA301 controlled by the "relay KA3" is closed. The "relay KM1" on the circuit is energized, and the electric control switch KM101 is closed. The "power supply main circuit LA, LB, LC" of the power receiving device 1 is connected to the RTG main circuit. The external power supply supplies power to the RTG main circuit in the power failure through the power receiving device 1.

[0083] It should be noted that in the power-receiving mode, the first linkage switch 8 on the power supply and receiving device 1 of the RTG in the power-off fault mode does not work (i.e., the normally open power-on button switches SB101 and SB102 do not work), while the second linkage switch 10 works (i.e., the normally closed power-off button switches SB201 and SB202 work). The operator can disconnect the control interlocking circuit through the first linkage switch 8 to cut off the power supply to the power supply and receiving device of the power supply RTG (or other power supply).

[0084] When the external power supply connected to the power supply and receiving integrated device 1 of the power failure RTG is powered off, the control circuit in the power supply and receiving integrated device 1 is simultaneously powered off, and the relays KA2, KA3, and KM1 are all powered off. The relays KA2, KA3, and KM1 each control the corresponding contact to restore to normal (the normally open contact that is closed restores to the normally open state, and the normally closed contact that is open restores to the normally closed state), the power supply main circuit LA, LB, and LC of the power supply and receiving integrated device 1 is disconnected from the RTG main circuit, and the RTG main circuit is powered off, thereby protecting the safety of the equipment and personnel.

[0085] In actual use, the default state of the power supply and receiving integrated device 1 is the receiving state, that is, the power supply and receiving selection switch 9 is in the receiving mode, the contacts 1 and 2 of the power supply switch SA102 are disconnected, the contacts 3 and 4 of the power supply switch SA304 are disconnected, the contacts 5 and 6 of the power supply switch SA506 are closed, and the contacts 7 and 8 of the power supply switch SA708 are closed. At this time, the normally open power supply button switches SB101 and SB102 are disconnected, and the normally closed power-off button switches SB201 and SB202 remain closed.

[0086] For example, the normally closed power-off button switches SB201 and SB202 are linked normally closed switches, and the normally open power supply button switches SB101 and SB102 are linked normally open switches. The power supply function of the power supply and receiving integrated device 1 is realized as follows:

[0087] When the powered RTG and the power failure RTG of the power supply and receiving integrated device 1 are connected through the emergency power supply cable 2, the power supply and receiving integrated device 1 on the power supply RTG needs to be selected to the power supply mode (that is, the contacts 1 and 2 are closed, the contacts 3 and 4 are closed, the contacts 5 and 6 are disconnected, and the contacts 7 and 8 are disconnected).

[0088] At this time, the power supply RTG main circuit is powered, the control transformer T1 is reduced in voltage and converted into a control voltage, the control circuit is powered, the power supply detection relay KA1 is powered, the normally closed contact KA101 controlled by the power supply detection relay KA1 is disconnected, and since the power supply lines LA, LB, and LC on the power supply main circuit are not powered at this time, the power-on detection relay KA2 is not powered, so the contacts controlled by the power-on detection relay KA2 maintain the normal state (that is, the normally closed contact KA202 remains closed, and the normally open contacts KA201, KA203, and KA204 remain disconnected).

[0089] After pressing the closed "power button switch SB101 or power button switch SB102", the "power button switch SB101" and "power button switch SB102" are closed, and the "power delay relay KT1" is powered on. The "power delay relay KT1" controls the normally open contacts KT101, KT102 and KT104 to close, and the normally closed delay opening contact KT103 starts timing. When the "power button switch" (the "power button switch SB101" and "power button switch SB102") is reset and opened, the "power delay relay KT1" still maintains the power-on state, and the "power delay relay KT1" controls the action of each contact. The "main circuit relay KM1" is powered on, the power supply line LA, LB and LC on the power supply circuit are powered on, and the high-power socket 3 has power. At this time, the power supply and receiving integrated device 1 of the connected power-off RTG is in a power receiving state, one end of the power supply and receiving integrated device 1 is connected with the emergency power cable 2, and the other end is connected with the RTG main circuit, realizing the power supply of the power-off RTG. The relevant power receiving principle has been described in the power receiving state, and will not be described here.

[0090] After a short delay, the normally closed delay opening contact KT103 of the power-on RTG delay relay KT1 opens. At this time, since the power-on RTG is in a power supply state, its power supply main circuit LA, LB and LC has power, the "control transformer T2" of the power-on RTG is stepped down to control voltage, and the "power-on detection relay KA2" of the control circuit is powered on. The "power-on detection relay KA2" controls the action of each contact (i.e. the normally open contacts KA201, KA203 and KA204 are closed, and the normally closed contact KA202 is opened). Since the power-on RTG main circuit has power at this time, the "power-on detection relay KA1" has power, and the normally closed contact KA101 controlled by the "power-on detection relay KA1" is opened. In addition, the "power supply and receiving selection switch 9" is in the power supply position, the points 5 and 6 are disconnected, the "relay KA3" is not powered on, and does not participate in control. Therefore, the normally open contacts KA203 and KA204 are closed, and the "relay KA3" controlled by the normally open contact KA301 is closed.

[0091] At this time, the power-off RTG has automatically realized power receiving, and the contacts KA203 and KA204 of the power-off RTG have also been closed. Since the two groups of plugs 6 are connected to the socket 3, the limit switches (LS1, LS2) of the power-on RTG and the limit switches (LS1, LS2) of the power-off RTG are detected and turned on.

[0092] In summary, the power supply control circuit of the power-on RTG power supply and receiving integrated device changes at this time:

[0093] (1) the "normally closed contact KA202" of the power-on RTG is disconnected, but since the "normally open contact KT102" of the power-on RTG has been closed, the circuit is self-locked, and the control of the "normally closed contact KA202" on the circuit does not work at this time.

[0094] (2) the "power-on delay relay KT1" of the power-on RTG still maintains the power-on action state, but its control circuit has been changed, and at this time the circuit lines that maintain the work of the "power-on delay relay KT1" are in turn: one end of the "control transformer T1", 1 point and 2 point of the "power-on switch SA102", the "contact KT101", the "power-off button switch SB201", the "power-on delay relay KT1" coil, the "limit switch LS2", the "contact KA203", the "limit switch LS1", the "limit switch LS1" of the power-off RTG, the "contact KA203" of the power-off RTG, the "normally closed delay disconnect contact KT103" of the power-off RTG, the "contact KA204" of the power-off RTG, the "power-off button switch SB202" of the power-off RTG, the "interlock control end S2" of the power-off RTG, the "interlock control end S2" of the power-on RTG, the "power-off button switch SB202" of the power-on RTG, the "contact KA204" of the power-on RTG, the "contact KT104" of the power-on RTG, 3 point and 4 point of the "power-on switch SA304" of the power-on RTG, and the other end of the "control transformer T1" of the power-on RTG.

[0095] When it is necessary to turn off the power supply state of the power supply and reception integrated device, only the "power-off button switch SB201" and the "power-off button switch SB202" are pressed in linkage, the "power-on delay relay KT1" loses power, the self-locking is released (that is, the normally open contacts KT101 and KT102 return to the normally open state), the "relay KM1" loses power, the electric control switch KM101 is disconnected, the power supply lines LA, LB and LC on the power supply main circuit are disconnected with the RTG main circuit, and the power supply and reception integrated device stops supplying power to the outside.

[0096] The purpose of the present application is to provide a device that is technically feasible, easy to operate, fast and quick in operation, safe and reliable, and can be applied to all types of RTGs, providing an emergency solution to ensure the rapid recovery of normal operation, to solve the problem of serious impact on normal production due to power supply failure of the RTG, and in the actual application process, the power supply and reception integrated device can also be used as an RTG maintenance power supply interface for RTG maintenance power supply.

[0097] The power supply and reception integrated device provided by the present application has the advantages of high safety and good reliability, and especially by adopting a safety interlocking circuit design, the protection of personnel and equipment in the actual operation process can be realized, and the safety interlocking circuit design and its working principle are as follows:

[0098] I. Safety interlocking circuit design:

[0099] (1) The power transmission mode and the power receiving mode are interlocked. The power transmission mode and the power receiving mode are switched by the "power transmission and receiving selection switch". The power transmission switch SA102, the power transmission switch SA304, the power receiving switch SA506, and the power receiving switch SA708 of the "power transmission and receiving selection switch" cannot be closed at the same time. The power supply and receiving state of the power supply integrated device is detected by the power receiving detection relay KA1 and the power transmission detection relay KA2 to realize interlocking protection.

[0100] (2) The limit detector for detecting the matching of the plug and the socket is set, and the limit switches LS1 and LS2 are combined to realize non-live plug-in protection and over-pull force protection. Only when the plug is inserted into the socket and the limit detector detects the plug shell, the limit switches LS1 and LS2 will actuate and close, and the related control circuit will be turned on. Only then the "power transmission delay relay KT1" will be powered. When the plug is not inserted into the socket, is pulled out, or is pulled by external force, the limit detector will control the limit switches LS1 and LS2 to actuate and open due to the deformation of the plug shell under stress or exceeding the monitoring distance, and the related control circuit will be cut off. The "power transmission delay relay KT1" loses power, the "relay KM1" loses power, and the power supply is stopped.

[0101] (3) The safety interlocking circuits of the power supply and receiving integrated devices of the powered RTG and the unpowered RTG are connected together through the two control lines in the emergency cable. When any of the powered RTG or the unpowered RTG has a problem, the power supply can be cut off before the phase line is disconnected, ensuring safety.

[0102] II. Working principle of safety interlocking circuit:

[0103] (1) Under the premise that the "RTG main circuit" and the "power supply main circuit power supply lines LA, LB, and LC" have power, the "RTG main circuit" cannot realize power transmission operation. The power supply main circuit power supply lines LA, LB, and LC realize automatic connection of the RTG main circuit, and the RTG main circuit and the power supply lines LA, LB, and LC cannot be connected.

[0104] When the RTG main circuit has power, the control transformer T1 outputs a control voltage, the "power detection relay KA1" is powered, and the normally closed electric control switch controlled by the "power detection relay KA1" is opened. At this time, if the power supply main circuit supply lines LA, LB, and LC also have power, the "control transformer T2" simultaneously outputs a control voltage, the "power detection relay KA2" is powered, and the normally closed electric control switch controlled by the "power detection relay KA2" is opened. At this time, the "power delay relay KT1" and the "relay KA3" coil loop are cut off and cannot act, so the "relay KM1" cannot be controlled to act, and the RTG main circuit and the power supply main circuit supply lines LA, LB, and LC cannot be connected, and the power supply and power receiving integrated device cannot supply or receive power. Even if the operator misoperates, it will not cause a short circuit or contact, improving the safety of the power supply system during use. Similarly, the two RTGs connected by the power connector will not have the possibility of simultaneous power supply, ensuring the safety of the RTG during use.

[0105] (2) When one RTG supplies power to another RTG, if either plug at both ends of the emergency power cable is disconnected from the socket, the power supply RTG will automatically cut off the power supply to the outside before the phase line is disconnected, ensuring the safety of the equipment and personnel. For example, when one RTG supplies power to another RTG, whether the plug of the power supply cable at the power supply end is disconnected from the socket or the plug of the power supply cable at the power receiving end is disconnected from the socket, the socket will disconnect the power connection limit stop LS on the power supply and power receiving integrated device, or the control interlocking end will be disconnected, the delay relay KT1 on the power supply RTG power supply and power receiving integrated device will immediately lose power, the electric control switch controlled by the delay relay KT1 will immediately disconnect, the "relay KM1" will immediately lose power and disconnect, the main contact electric control switch "KM101" controlled by the "relay KM1" will also be disconnected at random, the power supply RTG main circuit and the power supply main circuit supply lines LA, LB, and LC will be disconnected, and the power supply will be cut off, ensuring the safety of the equipment and personnel. Similarly, if the power-off RTG encounters some unexpected situation during power reception and needs to cut off the power supply, it does not need to run to the power-on RTG to cut off the power supply, but only needs to press the "normally closed power-off button SB202" locally to immediately cut off the power supply, ensuring safety.

[0106] The application provides a bidirectional partner power supply system and method for a rubber-tyred container gantry crane, wherein the power supply system of one RTG is connected with another RTG through a power supply and receiving integrated device and an emergency power supply cable, so that the one RTG can supply power to the other RTG, and the two RTGs sharing the power supply can be operated in parallel and alternately at low speed, and the trolley can also walk at low speed; the power supply and receiving integrated device is arranged on the RTG, and the power supply and receiving integrated devices on the two RTGs are connected through the emergency power supply cable, the power supply and receiving integrated device on each RTG can be a power supply device or a power receiving device, and the operator only needs to adjust the power supply and receiving integrated device to different working modes, so that the powered RTG can supply power to the power-off fault RTG, the operation is simple, the difficulty of restoring power supply of the power-off fault RTG is reduced, the power supply system and method have the characteristics of quick operation and quick response.

[0107] The system provided by the application has perfect safety design even when operated remotely: first, the power connector can be plugged in and out without electricity in any state; second, the power supply and receiving integrated device can immediately stop supplying power to the outside when the emergency power supply cable is disconnected by external force, so that accidents can be avoided; and third, the two normal rubber-tyred gantry cranes can be connected together without power supply line connection, and even in the forced power supply mode, the power supply line connection problem can be avoided, so that safety is guaranteed.

[0108] The above only describes the preferred embodiments of the application and is not used to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A bi-directional partner power supply system for a rubber tired container gantry crane, characterized by: The application relates to a power supply and receiving integrated device (1) arranged on a rubber-tyred container gantry crane, and an emergency power supply cable (2) for connecting the power supply and receiving integrated device (1); the power supply and receiving integrated device (1) is connected with a main circuit of the rubber-tyred container gantry crane through an electric control switch KM101, and a control circuit for controlling the on-off of the electric control switch KM101 is arranged in the power supply and receiving integrated device (1); the emergency power supply cable (2) is detachably arranged on the power supply and receiving integrated device (1), and when the emergency power supply cable (2) is disconnected from the power supply and receiving integrated device (1), the control circuit controls the electric control switch KM101 to disconnect the power supply and receiving integrated device (1) from the main circuit of the rubber-tyred container gantry crane; The control circuit comprises linkage normal-open power supply button switches SB101 and SB102, linkage normal-close power-off button switches SB201 and SB202, power supply switches SA102, power supply switches SA304, power receiving switches SA506, power receiving switches SA708, power supply detection relays KA1, power receiving detection relays KA2, power supply delay relays KT1, relay KA3, main circuit relays KM1, detection limit switches LS1 and LS2, power supply indication lamps D1 and D2, control transformers T1 and T2, control interlocking ends S1 and S2, power supply lines LA, LB and LC, and a grounding line PE; The power supply line LA is connected with a three-phase power supply line L1 of the main circuit of the rubber-tyred container gantry crane, the power supply line LB is connected with a three-phase power supply line L2 of the main circuit of the rubber-tyred container gantry crane, the power supply line LC is connected with a three-phase power supply line L3 of the main circuit of the rubber-tyred container gantry crane, the grounding line PE is connected with a grounding line of the three-phase power supply line of the main circuit of the rubber-tyred container gantry crane, and the electric control switch KM101 is arranged between the power supply line LA and the three-phase power supply line L1, between the power supply line LB and the three-phase power supply line L2, and between the power supply line LC and the three-phase power supply line L3; and the electric control switch KM101 is controlled by the main circuit relays KM1 to be turned on or off. The one end of the primary coil of the control transformer T1 is connected with the three-phase power supply line L1 of the main circuit of the rubber-tyred container gantry crane, and the other end is connected with the three-phase power supply line L3 of the main circuit of the rubber-tyred container gantry crane, the two ends of the power supply detection relay KA1 are connected with the two ends of the secondary coil of the control transformer T1, the one end of the secondary coil of the control transformer T1 is connected with the control interlocking end S2 in sequence through the power supply switch SA102, the normally open power supply button switch SB101, the normally closed contact KA202 of the power supply detection relay KA2, the normally closed power-off button switch SB201, the power supply delay relay KT1, the detection limit switch LS2, the normally closed delay opening contact KT103 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202; The normally open contact KT101 of the power supply delay relay KT1 is arranged between the normally closed contact KA202 of the power supply detection relay KA2 and the normally closed power-off button switch SB201, one end of the normally open contact KT101 is connected with the normally closed power-off button switch SB201 or the normally closed contact KA202, and the other end is connected with the secondary coil of the control transformer T1 through the power supply switch SA102; The power supply indicating lamp D1 is arranged between the normally closed power-off button switch SB201 and the power supply delay relay KT1, one end of the power supply indicating lamp D1 is connected with the normally closed power-off button switch SB201 or the power supply delay relay KT1, and the other end is connected with the control interlocking end S2 in sequence through the normally open contact KA204 of the power supply detection relay KA2 and the normally closed power-off button switch SB202; the normally open power supply button switch SB102 is arranged between the power supply indicating lamp D1 and the normally open contact KA204 of the power supply detection relay KA2, one end of the normally open power supply button switch SB102 is connected with the power supply indicating lamp D1, and the other end is connected with the control interlocking end S2 in sequence through the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202; The normally open contact KA203 of the power supply detection relay KA2 is arranged between the detection limit switch LS2 and the normally closed delay opening contact KT103 of the power supply delay relay KT1, one end of the normally open contact KA203 is connected with the detection limit switch LS2 or the normally closed delay opening contact KT103, and the other end is connected with the control interlocking end S1 through the detection limit switch LS1; The one end of the primary coil of the control transformer T2 is connected with the power supply line LA, and the other end is connected with the power supply line LC. The two ends of the power supply detection relay KA2 are connected with the two ends of the secondary coil of the control transformer T2. The one end of the secondary coil of the control transformer T2 is connected with the control interlocking end S2 in sequence through the power receiving switch SA506, the normally open contact KA201 of the power supply detection relay KA2, the normally closed contact KA101 of the power supply detection relay KA1, the relay KA3, the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202. The two ends of the relay KA3 are connected in parallel with the power receiving indicator D2. The other end of the secondary coil of the control transformer T2 is connected with the control interlocking end S2 in sequence through the power receiving switch SA708, the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202. The one end of the main circuit relay KM1 is provided with the normally open contact KT102 of the power supply delay relay KT1 and the normally open contact KA301 of the relay KA3. The other end of the main circuit relay KM1 is connected with the control interlocking end S2 in sequence through the normally open contact KT104 of the power supply delay relay KT1, the normally open contact KA204 of the power supply detection relay KA2, and the normally closed power-off button switch SB202. The one end of the normally open contact KT102 is connected with the main circuit relay KM1. The other end of the normally open contact KT102 is connected with the secondary coil of the control transformer T1 through the power supply switch SA102. The one end of the normally open contact KA301 is connected with the main circuit relay KM1. The other end of the normally open contact KA301 is connected with the secondary coil of the control transformer T2 through the power receiving switch SA506. The normally closed contact KA101 is controlled by the power supply detection relay KA1. The normally open contact KA201, the normally closed contact KA202, the normally open contact KA203, and the normally open contact KA204 are controlled by the power supply detection relay KA2. The normally open contact KT101, the normally open contact KT102, the normally closed delay contact KT103, and the normally open contact KT104 are controlled by the power supply delay relay KT1. The normally open contact KA301 is controlled by the relay KA3. The power supply and power receiving integrated device (1) comprises a socket (3). The socket (3) is provided with connection sockets connected with the control interlocking end S1, the control interlocking end S2, the power supply line LA, the power supply line LB, the power supply line LC, and the grounding line PE respectively. The emergency power supply cable (2) comprises a power supply cable (5). The two ends of the power supply cable (5) are provided with plugs (6) capable of cooperating with the socket (3). The plugs (6) are provided with plug pins capable of cooperating with the connection sockets. The power supply and receiving integrated device (1) further comprises a power supply and receiving selection switch (9) for controlling the on-off of the power supply switches SA102, SA304, the power receiving switches SA506 and SA708, so that when the power supply switches SA102 and SA304 are closed, the power receiving switches SA506 and SA708 are opened, and when the power supply switches SA102 and SA304 are opened, the power receiving switches SA506 and SA708 are closed.

2. A bidirectional partner power supply system for a rubber-tired container gantry crane according to claim 1, characterized in that, The power supply and receiving integrated device (1) comprises: A limit detector (7) for detecting the cooperation of the plug (6) and the socket (3), the limit detector (7) is arranged corresponding to the socket (3), the detection limit switches LS1 and LS2 are connected with the limit detector (7) to realize the control of the limit detector (7) on the on-off of the detection limit switches LS1 and LS2; when the limit detector (7) detects that the plug (6) and the socket (3) are cooperated in place, the limit detector (7) controls the detection limit switches LS1 and LS2 to be closed, otherwise, the limit detector (7) controls the detection limit switches LS1 and LS2 to be opened.

3. A method of supplying power using the bidirectional partner power supply system for a rubber-tired container gantry crane according to claim 1, characterized by, Comprise: The power supply and receiving integrated device (1) is arranged on the rubber-tyred container gantry crane; The power supply and receiving integrated devices (1) on the two rubber-tyred container gantry cranes are connected by the emergency power supply cable (2), and at least one of the main circuits of the rubber-tyred container gantry cranes is powered; In the power supply state, when one of the main circuits of the rubber-tyred container gantry crane is powered and the other is powered off, the control circuits of the power supply and receiving integrated devices (1) on the two rubber-tyred container gantry cranes control the electric control switch KM101 to be closed, so that the power supply and receiving integrated devices (1) on the two rubber-tyred container gantry cranes are connected with the corresponding main circuits of the rubber-tyred container gantry cranes, and the power supply and receiving integrated device (1) on the powered rubber-tyred container gantry crane is switched to the power supply mode, and the power supply and receiving integrated device (1) on the powered-off rubber-tyred container gantry crane is switched to the power receiving mode, so as to realize the power supply from the main circuit of the powered rubber-tyred container gantry crane to the main circuit of the powered-off rubber-tyred container gantry crane; When both of the main circuits of the rubber-tyred container gantry cranes are powered, the control circuits of the power supply and receiving integrated devices (1) on the two rubber-tyred container gantry cranes control the electric control switch KM101 to be opened, so that the connection between the power supply and receiving integrated devices (1) and the main circuits of the rubber-tyred container gantry cranes is disconnected; When the emergency power supply cable is disconnected from any one of the power supply and receiving integrated devices (1) on the rubber-tyred container gantry crane, the control circuit of the power supply and receiving integrated device (1) controls the electric control switch KM101 to be opened, so that the connection between the power supply and receiving integrated device (1) and the main circuit of the rubber-tyred container gantry crane is disconnected.

Images