Shore crane pitching emergency system

Abstract

The invention belongs to the field of quay cranes, and particularly relates to a quay crane pitching emergency system. An emergency main motor control loop used for controlling an emergency main motor M1, an oil pump motor control loop used for controlling an oil pump motor M2, a low-speed brake electromagnetic valve control loop used for controlling a low-speed brake electromagnetic valve and a high-speed brake control loop used for controlling a high-speed brake are arranged in the pitching emergency cabinet. A power supply circuit for outputting a control power supply from the incoming power supply; the cabinet door of the pitching emergency cabinet is provided with function switch buttons in each loop and power supply circuit. The emergency operation efficiency of the quay crane in the initial assembling, installing and debugging process is remarkably improved, and troubleshooting is facilitated.

Description

Technical Field

[0001] The invention belongs to the field of quay cranes, and in particular relates to a quay crane pitch emergency system. Background Art

[0002] During the initial assembly of the bridge crane, the whole machine line was not connected, and the official power could not be delivered to the quay crane equipment. During the installation and commissioning process, when it was necessary to test the lifting and lowering of the front beam of the quay crane, including the lifting and lowering of the front beam of the quay crane, the emergency motor could only be used. However, when the emergency motor is currently used, the pitch emergency system uses the components of the quay crane equipment itself, which requires temporary line changes and wiring. Since the components of the quay crane equipment itself are not in the same cabinet, wiring is time-consuming, and when a fault occurs, it is cumbersome to check the line, which seriously affects the efficiency of installation and commissioning operations. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a quay crane pitch emergency system, which significantly improves the emergency operation efficiency of the quay crane during the initial assembly, installation and commissioning process by introducing an integrated pitch emergency cabinet, and facilitates fault troubleshooting.

[0004] The technical solution of the present invention is: a quay crane pitch emergency system, including a pitch emergency cabinet, in which an emergency main motor control circuit for controlling an emergency main motor M1, an oil pump motor control circuit for controlling an oil pump motor M2, a low-speed brake solenoid valve control circuit for controlling a low-speed brake solenoid valve, a high-speed brake control circuit for controlling a high-speed brake, and a power supply circuit for outputting a control power supply from an incoming power supply are arranged. The control power supply is used to supply power to the emergency main motor control circuit, the oil pump motor control circuit, the low-speed brake solenoid valve control circuit, and the high-speed brake control circuit; function switch buttons in each circuit and the power supply circuit are arranged on the cabinet door of the pitch emergency cabinet.

[0005] In an optional embodiment, the power circuit includes a power circuit breaker Q1, a power circuit breaker Q5, a plug-in limit switch D2 and an emergency stop switch ES1; The first end of the power circuit breaker Q1 is connected to the incoming power supply, and the second end outputs the power supply. The first end of the power circuit breaker Q5 is connected to the power supply, and the second end outputs the control power after the plug-in limit switch D2 and the emergency stop switch ES1 are connected in series.

[0006] In an optional embodiment, the oil pump motor control circuit includes a power circuit breaker Q2, a contactor B2KM3, a thermal relay FR2, a two-position selector switch SB1, and a time delay relay KT; The first end of the power circuit breaker Q2 is connected to the power supply, and the second end is connected to the oil pump motor M2 via the main normally open contact of the contactor B2KM3 and the heating element of the thermal relay FR2; The first switch of the two-position selector switch SB1, the contact of the thermal relay FR2, the normally closed contact of the delay relay KT, the oil pump low pressure switch T1, and the coil of the contactor B2KM3 are connected in series, and one end is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply; the first auxiliary normally open contact of the contactor B2KM3 is connected in parallel with the oil pump low pressure switch T1; The coil of the time delay relay KT is connected in series with the oil pump high pressure switch T2, one end of which is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply.

[0007] In an optional embodiment, the low-speed brake solenoid valve control circuit includes an AC / DC converter AD, a contactor B3KM5, a start switch SB2, and a stop switch SB6; The input end of the AC / DC converter AD is connected to the second end of the power circuit breaker Q5, and the output end outputs DC power to the low-speed brake solenoid valve through the main normally open contact of the contactor B3KM5; The second selector switch of the two-position selector switch SB1, the start switch SB2, the stop switch SB6, and the coil of the contactor B3KM5 are connected in series, one end of which is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply; the first auxiliary normally open contact of the contactor B3KM5 is connected in parallel with the start switch SB2.

[0008] In an optional embodiment, the emergency main motor control circuit includes a forward contactor B2KM1, a reverse contactor B2KM2, a thermal relay FR1, a start switch SB3, a start switch SB4, a stop switch SB5, and an inching / holding switch SB7; The first end of the main normally open contact of the forward contactor B2KM1 is connected to the second end of the power circuit breaker Q1, and the second end of the main normally open contact of the forward contactor B2KM1 is connected to the emergency main motor M1 via the heating element of the thermal relay FR1; at the same time, the main normally open contact of the reverse contactor B2KM2 is connected in parallel with the main normally open contact of the forward contactor B2KM1; The first end of the stop switch SB5 is connected to the positive electrode of the control power supply, and the second end is connected to the first end of the second auxiliary normally open contact of the contactor B3KM5 via the contact of the thermal relay FR1, and the second end of the second auxiliary normally open contact of the contactor B3KM5 is connected to the negative electrode of the control power supply via the series-connected start switch SB3, the first auxiliary normally closed contact of the reversing contactor B2KM2, and the coil of the forward contactor B2KM1; The first auxiliary normally open contact of the forward contactor B2KM1 and the first switch of the inching / holding switch SB7 are connected in series and then in parallel with the starting switch SB3; The first end of the start switch SB4 is connected to the second end of the second auxiliary normally open contact of the contactor B3KM5, and the second end of the start switch SB4 is connected to the negative pole of the control power supply through the first auxiliary normally closed contact of the forward contactor B2KM1 and the coil of the reverse contactor B2KM2 connected in series; The first auxiliary normally open contact of the reversing contactor B2KM2 and the second position selection switch of the inching / holding switch SB7 are connected in series and then in parallel with the starting switch SB4.

[0009] In an optional embodiment, the high-speed brake control circuit includes a power circuit breaker Q3, a contactor B2KM4, and a thermal relay FR3; The first end of the power circuit breaker Q3 is connected to the power supply, and the second end is connected to the high-speed brake motor M3 via the main normally open contact of the contactor B2KM4 and the heating element of the thermal relay FR3; The first end of the contact of thermal relay FR3 is connected to the second end of stop switch SB5, and the second end of the contact of thermal relay FR3 is connected to the negative pole of the control power supply through the second auxiliary normally open contact of forward contactor B2KM1 and the coil of contactor B2KM4; the second auxiliary normally open contact of forward contactor B2KM1 is connected in parallel with the second auxiliary normally open contact of reverse contactor B2KM2.

[0010] In an optional embodiment, the pitch emergency cabinet is also provided with an emergency motor forward indicator light circuit, an emergency motor reverse indicator light circuit, a low-speed brake solenoid valve start indicator light circuit, an oil pump motor M2 start indicator light circuit, an emergency motor stop indicator light circuit, an oil pump motor M2 stop indicator light circuit, and a low-speed brake solenoid valve stop indicator light circuit.

[0011] In an optional embodiment, the emergency motor forward indicator light circuit includes an indicator light B5H1, a first end of the indicator light B5H1 is connected to a second end of a second auxiliary normally open contact of a contactor B3KM5 via a first auxiliary normally open contact of a contactor B2KM4 and a third auxiliary normally open contact of a forward contactor B2KM1, and a second end of the indicator light B5H1 is connected to a negative electrode of a control power supply; The emergency motor reversing indicator light circuit includes an indicator light B5H2, a first end of the indicator light B5H2 is connected to a second end of a second auxiliary normally open contact of the contactor B3KM5 via a second auxiliary normally open contact of the contactor B2KM4 and a third auxiliary normally open contact of the reversing contactor B2KM2, and a second end of the indicator light B5H2 is connected to a negative electrode of the control power supply; The low-speed brake solenoid valve start indicator light circuit includes an indicator light B5H4, a first end of the indicator light B5H4 is connected to the positive electrode of the control power supply via the third auxiliary normally open contact of the contactor B3KM5, and a second end of the indicator light B5H4 is connected to the negative electrode of the control power supply; The oil pump motor M2 start indicator light circuit includes an indicator light B5H3, a first end of the indicator light B5H3 is connected to the positive output end of the AC / DC converter AD via the second auxiliary normally open contact of the contactor B2KM3, and a second end of the indicator light B5H3 is connected to the negative electrode of the control power supply; The emergency motor stop indicator light circuit includes an indicator light B5H5, a first end of the indicator light B5H5 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the serially connected contactor B2KM4, the second auxiliary normally closed contact of the reverse contactor B2KM2, and the second auxiliary normally closed contact of the forward contactor B2KM1, and a second end of the indicator light B5H5 is connected to the negative electrode of the control power supply; The oil pump motor M2 stop indicator light circuit indicator light B5H6, the first end of the indicator light B5H6 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B2KM3, and the second end of the indicator light B5H6 is connected to the negative pole of the control power supply; The low-speed brake solenoid valve stop indicator light circuit indicator light B5H7, the first end of the indicator light B5H7 is connected in series to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B3KM5, and the second end of the indicator light B5H7 is connected to the negative pole of the control power supply.

[0012] In an optional embodiment, a three-phase maintenance socket circuit is also provided in the pitch emergency cabinet.

[0013] In an optional embodiment, the three-phase maintenance socket circuit includes a leakage switch Q6, a door limit D1, a capacitor C1 and an internal cabinet light LED; the first end of the leakage switch Q6 is connected to the power supply, the second end is connected to the maintenance socket, the positive output end of the other end is connected to the first end of the capacitor C1 through the door limit D1, the negative output end is connected to the second end of the capacitor C1, and the internal cabinet light LED is connected in parallel with the capacitor C1.

[0014] The present invention provides a quay crane pitch emergency system, which has the following beneficial effects compared to the prior art: by integrating the control power supply circuit, the emergency main motor control circuit, the oil pump motor control circuit, the low-speed brake solenoid valve control circuit and the high-speed brake control circuit in the pitch emergency cabinet, the wiring workload and complexity are reduced, and the convenience of installation and debugging is improved. At the same time, by concentrating the control circuit in the pitch emergency cabinet and equipping the cabinet door with function switch buttons, fault troubleshooting is more intuitive and convenient, and the time cost of fault troubleshooting is reduced. This solution no longer relies on other components of the quay crane equipment itself, thereby improving the reliability and flexibility of emergency operations. During the test process of the quay crane pitching front beam action (such as raising the quay crane front beam, lowering the front beam, etc.), the operation can be performed more efficiently and safely, ultimately improving the overall efficiency of the quay crane during the initial assembly, installation and debugging process, and providing a strong guarantee for the smooth commissioning and operation of the quay crane equipment. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is the main circuit control diagram Figure 1 .

[0016] Figure 2 This is the main circuit control diagram Figure 2 .

[0017] Figure 3 It is a schematic diagram of the control circuit of each mechanism.

[0018] Figure 4 It is a schematic diagram of the indicator light circuit of each mechanism.

[0019] Figure 5 This is a schematic diagram of the button layout on the cabinet door. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] like Figure 1-Figure 3 As shown, a quay crane pitching emergency system provided in this embodiment includes a pitching emergency cabinet, in which an emergency main motor control circuit, an oil pump motor control circuit, a low-speed brake solenoid valve control circuit, a high-speed brake control circuit, and a power supply circuit for outputting control power from an incoming power supply are arranged. The emergency main motor control circuit is used to control the emergency main motor M1, the oil pump motor control circuit is used to control the oil pump motor M2, the low-speed brake solenoid valve control circuit is used to control the low-speed brake solenoid valve, the high-speed brake control circuit is used to control the high-speed brake, and the control power output by the power supply circuit is used to power the emergency main motor control circuit, the oil pump motor control circuit, the low-speed brake solenoid valve control circuit, and the high-speed brake control circuit.

[0023] like Figure 1 and Figure 2 As shown, the power circuit includes power circuit breaker Q1, power circuit breaker Q5, plug-in limit D2 and emergency stop switch ES1. The first end of the power circuit breaker Q1 is connected to the incoming power supply (P0A11\P0A12\P0A13), and the second end outputs the power supply. The first end of the power circuit breaker Q5 is connected to the power supply (B2C11\B2C12\B2C13), and the second end outputs the control power (B3E42\B3E43) after the plug-in limit D2 and emergency stop switch ES1 are connected in series. When using the quay crane pitching emergency system, the emergency clutch should be installed in place, and the fork limit D2 should be activated. If the D2 signal is lost (the system loses power) during use, all mechanisms will stop running. The emergency clutch is a device that connects the emergency main motor M1 and the reduction box. When the quay crane pitching emergency system of this embodiment is used, the emergency main motor M1 is controlled to work. When the normal motor of the quay crane is operating, the quay crane pitching emergency system of this embodiment does not work. The emergency main motor M1 is connected to the reduction box through the emergency clutch, the reduction box is connected to the drum, and the drum is wound with a wire rope to lift or lower the front beam. The emergency stop switch ES1 controls the entire control circuit to shut down.

[0024] like Figure 1 and Figure 3 As shown, the oil pump motor control circuit includes power circuit breaker Q2, contactor B2KM3, thermal relay FR2, two-position selector switch SB1, and delay relay KT.

[0025] The first end of the power circuit breaker Q2 is connected to the power supply, and the second end is connected to the oil pump motor M2 via the main normally open contact of the contactor B2KM3 and the heating element of the thermal relay FR2. This circuit is the main circuit of the oil pump motor M2 and is used to power the oil pump motor M2. It should be noted that the oil pump motor M2 is a low-speed brake oil pump motor.

[0026] The first switch of the two-position selector switch SB1, the contact of the thermal relay FR2, the normally closed contact of the time delay relay KT, the oil pump low pressure switch T1, and the coil of the contactor B2KM3 are connected in series, and one end is connected to the positive pole of the control power supply, and the other end is connected to the negative pole of the control power supply; the first auxiliary normally open contact of the contactor B2KM3 is connected in parallel with the oil pump low pressure switch T1. The coil of the time delay relay KT is connected in series with the oil pump high pressure switch T2, and one end is connected to the positive pole of the control power supply, and the other end is connected to the negative pole of the control power supply. This circuit controls the operation of the oil pump motor M2.

[0027] At startup, the two-position selector switch SB1 is turned to start (this button should be turned to the start mode under normal circumstances, otherwise it will affect the normal operation of the equipment), and the low-speed brake oil pump motor M2 contactor (B2KM3) controls the start and stop through the high-pressure / low-pressure pressure switch (T1, T2). Normally, the high-pressure / low-pressure signal is 0. When the low-pressure signal is closed, the low-speed brake oil pump motor M2 starts to pressurize. When the high-pressure signal is closed, the KT time relay is activated, and the motor stops after a delay of 3S to maintain the pressure. The oil pump motor has pressure protection and does not need to be started all the time to avoid causing high temperature in the oil tank. After the oil pump motor M2 works, the hydraulic station starts to pressurize. After the pressure reaches the set value, the oil pump motor M2 stops working. Only when the pressure reaches the requirement can the low-speed brake open and close normally.

[0028] In this embodiment, during use, if any signal of the two-position selector switch SB1 or the fork limiter D2 is lost, the entire system will stop running, ensuring that the equipment can run safely and stop working in time when a fault occurs.

[0029] like Figure 2 and Figure 3 As shown, the low-speed brake solenoid valve control circuit includes an AC-DC converter AD, a contactor B3KM5, a start switch SB2, and a stop switch SB6.

[0030] The input end of the AC / DC converter AD is connected to the second end of the power circuit breaker Q5, and the output end outputs DC power to the low-speed brake solenoid valve through the main normally open contact of the contactor B3KM5. This circuit supplies power to the low-speed brake solenoid valve.

[0031] The second selector switch of the two-position selector switch SB1, the start switch SB2, the stop switch SB6, and the coil of the contactor B3KM5 are connected in series, one end of which is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply; the first auxiliary normally open contact of the contactor B3KM5 is connected in parallel with the start switch SB2. This circuit controls the power supply path of the low-speed brake solenoid valve.

[0032] The operation of the low-speed brake is controlled by contactor B3KM5. The low-speed brake solenoid valve controls the contactor B3KM5 to start through the start switch SB2, and the two-position selector switch SB1 needs to be turned to the start position. (One main valve, one control valve, and the auxiliary contact of the contactor are placed in the motor start control circuit to ensure that the emergency motor is allowed to start only after the low-speed brake is opened). The stop switch SB6 is used for stopping. When wiring the limit, you need to pay attention to the voltage level of the limit. This system is designed for 220V.

[0033] like Figure 1 and 3As shown, the emergency main motor control circuit includes forward contactor B2KM1, reverse contactor B2KM2, thermal relay FR1, start switch SB3, start switch SB4, stop switch SB5, and inching / holding switch SB7.

[0034] The first end of the main normally open contact of the forward contactor B2KM1 is connected to the second end of the power circuit breaker Q1, and the second end of the main normally open contact of the forward contactor B2KM1 is connected to the emergency main motor M1 via the heating element of the thermal relay FR1; at the same time, the main normally open contact of the reverse contactor B2KM2 is connected in parallel with the main normally open contact of the forward contactor B2KM1; this circuit is used to supply power to the emergency main motor M1.

[0035] The first end of the stop switch SB5 is connected to the positive electrode of the control power supply, and the second end is connected to the first end of the second auxiliary normally open contact of the contactor B3KM5 through the contact of the thermal relay FR1, and the second end of the second auxiliary normally open contact of the contactor B3KM5 is connected to the negative electrode of the control power supply through the series-connected start switch SB3, the first auxiliary normally closed contact of the reverse contactor B2KM2, and the coil of the forward contactor B2KM1. The first auxiliary normally open contact of the forward contactor B2KM1 and the first position switch of the inching / holding switch SB7 are connected in series and then connected in parallel with the start switch SB3. The first end of the start switch SB4 is connected to the second end of the second auxiliary normally open contact of the contactor B3KM5, and the second end of the start switch SB4 is connected to the negative electrode of the control power supply through the series-connected first auxiliary normally closed contact of the forward contactor B2KM1 and the coil of the reverse contactor B2KM2. The first auxiliary normally open contact of the reverse contactor B2KM2 and the second position selection switch of the inching / holding switch SB7 are connected in series and then connected in parallel with the start switch SB4.

[0036] In this embodiment, the emergency motor controls the contactor B2KM1 / B2KM2 to start forward and reverse through buttons SB3 / SB4, and stops through SB5. The two-position selector switch SB7 controls the motor to start or hold. The forward rotation of the contactor will drive the bridge crane pitching mechanism to rise, and the reverse rotation of the contactor will drive the bridge crane pitching mechanism to fall.

[0037] like Figure 1 and 3 As shown, the high-speed brake control circuit includes power circuit breaker Q3, contactor B2KM4, and thermal relay FR3.

[0038] The first end of the power circuit breaker Q3 is connected to the power supply, and the second end is connected to the high-speed brake motor M3 via the main normally open contact of the contactor B2KM4 and the heating element of the thermal relay FR3; this circuit is used to supply power to the high-speed brake motor M3.

[0039] The first end of the contact of thermal relay FR3 is connected to the second end of stop switch SB5, and the second end of the contact of thermal relay FR3 is connected to the negative pole of the control power supply through the second auxiliary normally open contact of forward contactor B2KM1 and the coil of contactor B2KM4; the second auxiliary normally open contact of forward contactor B2KM1 is connected in parallel with the second auxiliary normally open contact of reverse contactor B2KM2.

[0040] In this embodiment, the high-speed brake needs to be opened synchronously with the emergency main motor M1, and the control contactor B2KM4 is started and SB5 is stopped through the B2KM1 / B2KM2 auxiliary contacts. The functions of the low-speed brake and the high-speed brake are both braking. When the oil pump motor M2 stops running, the pitch mechanism can be safely stopped at the required position without position movement. The difference between the two is that the low-speed brake is always in the open state after the control is closed, and the high-speed brake is only opened when the oil pump motor M2 is running, and the brake is closed when the oil pump motor M2 stops. However, in an emergency, the two will be closed at the same time.

[0041] like Figure 4 As shown, the pitch emergency cabinet of this embodiment is also provided with an emergency motor forward indicator light circuit, an emergency motor reverse indicator light circuit, a low-speed brake solenoid valve start indicator light circuit, an oil pump motor M2 start indicator light circuit, an emergency motor stop indicator light circuit, an oil pump motor M2 stop indicator light circuit, and a low-speed brake solenoid valve stop indicator light circuit.

[0042] The emergency motor forward indicator light circuit includes an indicator light B5H1. The first end of the indicator light B5H1 is connected to the second end of the second auxiliary normally open contact of the contactor B3KM5 via the first auxiliary normally open contact of the contactor B2KM4 and the third auxiliary normally open contact of the forward contactor B2KM1. The second end of the indicator light B5H1 is connected to the negative pole of the control power supply.

[0043] The emergency motor reversal indicator light circuit includes an indicator light B5H2. The first end of the indicator light B5H2 is connected to the second end of the second auxiliary normally open contact of the contactor B3KM5 via the second auxiliary normally open contact of the contactor B2KM4 and the third auxiliary normally open contact of the reversing contactor B2KM2. The second end of the indicator light B5H2 is connected to the negative pole of the control power supply.

[0044] The low-speed brake solenoid valve start indicator light circuit includes an indicator light B5H4, a first end of the indicator light B5H4 is connected to the positive electrode of the control power supply via the third auxiliary normally open contact of the contactor B3KM5, and a second end of the indicator light B5H4 is connected to the negative electrode of the control power supply.

[0045] The oil pump motor M2 start indicator light circuit includes an indicator light B5H3, a first end of the indicator light B5H3 is connected to the positive output end of the AC / DC converter AD via the second auxiliary normally open contact of the contactor B2KM3, and a second end of the indicator light B5H3 is connected to the negative pole of the control power supply.

[0046] The emergency motor stop indicator light circuit includes an indicator light B5H5. The first end of the indicator light B5H5 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the series-connected contactor B2KM4, the second auxiliary normally closed contact of the reverse contactor B2KM2, and the second auxiliary normally closed contact of the forward contactor B2KM1. The second end of the indicator light B5H5 is connected to the negative pole of the control power supply.

[0047] The oil pump motor M2 stop indicator light circuit indicator light B5H6, the first end of the indicator light B5H6 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B2KM3, and the second end of the indicator light B5H6 is connected to the negative pole of the control power supply.

[0048] The low-speed brake solenoid valve stop indicator light circuit indicator light B5H7, the first end of the indicator light B5H7 is connected in series to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B3KM5, and the second end of the indicator light B5H7 is connected to the negative pole of the control power supply.

[0049] like Figure 5 As shown, the function switch buttons in each circuit are arranged on the cabinet door of the pitch emergency cabinet, mainly including the following switches and indicator lights.

[0050] SB1: Two-position selection switch, controls the low-speed oil pump motor M2 and the low-speed brake solenoid valve.

[0051] SB2: Low-speed brake solenoid valve is activated (with green indicator light B5H4).

[0052] SB3: Emergency motor forward start / high-speed brake start (with green indicator light B5H1).

[0053] SB4: Emergency motor reverse start / high-speed brake start (with green indicator light B5H2).

[0054] SB5: Emergency motor stop / high-speed brake stop (with red indicator light B5H5).

[0055] SB6; low speed brake solenoid valve stops (with red indicator light B5H7).

[0056] SB7: Two-position selector switch, controls the emergency motor to start / hold.

[0057] ES1: Emergency stop switch.

[0058] B5H3: Oil pump motor M2 start indicator light.

[0059] B5H6: Oil pump motor M2 stop indicator light. like Figure 1 and Figure 2As shown, a three-phase maintenance socket circuit is also provided in the pitch emergency cabinet of this embodiment.

[0060] The three-phase maintenance socket circuit includes a leakage switch Q6, a door limiter D1, a capacitor C1 and an LED light in the cabinet. The first end of the leakage switch Q6 is connected to the power supply, the second end is connected to the maintenance socket, the positive output end of the other end is connected to the first end of the capacitor C1 through the door limiter D1, the negative output end is connected to the second end of the capacitor C1, and the LED light in the cabinet is connected in parallel with the capacitor C1. In this embodiment, the leakage switch Q6 controls the 220V maintenance socket.

[0061] The above disclosure is only a preferred embodiment of the present invention, but the present invention is not limited thereto. Any non-creative changes that can be thought of by a person skilled in the art, as well as several improvements and modifications made without departing from the principle of the present invention, should fall within the protection scope of the present invention.

Claims

1. A quay crane pitch emergency system, characterized in that: It includes a pitch emergency cabinet, in which are arranged an emergency main motor control circuit for controlling the emergency main motor M1, an oil pump motor control circuit for controlling the oil pump motor M2, a low-speed brake solenoid valve control circuit for controlling the low-speed brake solenoid valve, a high-speed brake control circuit for controlling the high-speed brake, and a power supply circuit for outputting control power from the incoming power supply, and the control power supply is used to supply power to the emergency main motor control circuit, the oil pump motor control circuit, the low-speed brake solenoid valve control circuit, and the high-speed brake control circuit; function switch buttons in each circuit and the power supply circuit are arranged on the cabinet door of the pitch emergency cabinet.

2. The quay crane pitching emergency system according to claim 1, characterized in that: The power circuit includes power circuit breaker Q1, power circuit breaker Q5, plug-in limit switch D2 and emergency stop switch ES1; The first end of the power circuit breaker Q1 is connected to the incoming power supply, and the second end outputs the power supply. The first end of the power circuit breaker Q5 is connected to the power supply, and the second end outputs the control power after the plug-in limit switch D2 and the emergency stop switch ES1 are connected in series.

3. The quay crane pitching emergency system according to claim 2, characterized in that: The oil pump motor control circuit includes power circuit breaker Q2, contactor B2KM3, thermal relay FR2, two-position selector switch SB1, and time delay relay KT; The first end of the power circuit breaker Q2 is connected to the power supply, and the second end is connected to the oil pump motor M2 via the main normally open contact of the contactor B2KM3 and the heating element of the thermal relay FR2; The first switch of the two-position selector switch SB1, the contact of the thermal relay FR2, the normally closed contact of the delay relay KT, the oil pump low pressure switch T1, and the coil of the contactor B2KM3 are connected in series, and one end is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply; the first auxiliary normally open contact of the contactor B2KM3 is connected in parallel with the oil pump low pressure switch T1; The coil of the time delay relay KT is connected in series with the oil pump high pressure switch T2, one end of which is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply.

4. The quay crane pitching emergency system according to claim 3, characterized in that: The low-speed brake solenoid valve control circuit includes an AC / DC converter AD, a contactor B3KM5, a start switch SB2, and a stop switch SB6; The input end of the AC / DC converter AD is connected to the second end of the power circuit breaker Q5, and the output end outputs DC power to the low-speed brake solenoid valve through the main normally open contact of the contactor B3KM5; The second selector switch of the two-position selector switch SB1, the start switch SB2, the stop switch SB6, and the coil of the contactor B3KM5 are connected in series, one end of which is connected to the positive electrode of the control power supply, and the other end is connected to the negative electrode of the control power supply; the first auxiliary normally open contact of the contactor B3KM5 is connected in parallel with the start switch SB2.

5. The quay crane pitching emergency system according to claim 4, characterized in that: The emergency main motor control circuit includes forward contactor B2KM1, reverse contactor B2KM2, thermal relay FR1, start switch SB3, start switch SB4, stop switch SB5, and inching / holding switch SB7; The first end of the main normally open contact of the forward contactor B2KM1 is connected to the second end of the power circuit breaker Q1, and the second end of the main normally open contact of the forward contactor B2KM1 is connected to the emergency main motor M1 via the heating element of the thermal relay FR1; at the same time, the main normally open contact of the reverse contactor B2KM2 is connected in parallel with the main normally open contact of the forward contactor B2KM1; The first end of the stop switch SB5 is connected to the positive electrode of the control power supply, and the second end is connected to the first end of the second auxiliary normally open contact of the contactor B3KM5 via the contact of the thermal relay FR1, and the second end of the second auxiliary normally open contact of the contactor B3KM5 is connected to the negative electrode of the control power supply via the series-connected start switch SB3, the first auxiliary normally closed contact of the reversing contactor B2KM2, and the coil of the forward contactor B2KM1; The first auxiliary normally open contact of the forward contactor B2KM1 and the first switch of the inching / holding switch SB7 are connected in series and then in parallel with the starting switch SB3; The first end of the start switch SB4 is connected to the second end of the second auxiliary normally open contact of the contactor B3KM5, and the second end of the start switch SB4 is connected to the negative pole of the control power supply through the first auxiliary normally closed contact of the forward contactor B2KM1 and the coil of the reverse contactor B2KM2 connected in series; The first auxiliary normally open contact of the reversing contactor B2KM2 and the second position selection switch of the inching / holding switch SB7 are connected in series and then in parallel with the starting switch SB4.

6. The quay crane pitching emergency system according to claim 5, characterized in that: The high-speed brake control circuit includes power circuit breaker Q3, contactor B2KM4, and thermal relay FR3; The first end of the power circuit breaker Q3 is connected to the power supply, and the second end is connected to the high-speed brake motor M3 via the main normally open contact of the contactor B2KM4 and the heating element of the thermal relay FR3; The first end of the contact of thermal relay FR3 is connected to the second end of stop switch SB5, and the second end of the contact of thermal relay FR3 is connected to the negative pole of the control power supply through the second auxiliary normally open contact of forward contactor B2KM1 and the coil of contactor B2KM4; the second auxiliary normally open contact of forward contactor B2KM1 is connected in parallel with the second auxiliary normally open contact of reverse contactor B2KM2.

7. The quay crane pitching emergency system according to claim 6, characterized in that: The pitch emergency cabinet is also equipped with an emergency motor forward indicator light circuit, an emergency motor reverse indicator light circuit, a low-speed brake solenoid valve start indicator light circuit, an oil pump motor M2 start indicator light circuit, an emergency motor stop indicator light circuit, an oil pump motor M2 stop indicator light circuit, and a low-speed brake solenoid valve stop indicator light circuit.

8. The quay crane pitching emergency system according to claim 7, characterized in that: The emergency motor forward indicator light circuit includes an indicator light B5H1, a first end of the indicator light B5H1 is connected to a second end of a second auxiliary normally open contact of a contactor B3KM5 via a first auxiliary normally open contact of a contactor B2KM4 and a third auxiliary normally open contact of a forward contactor B2KM1, and a second end of the indicator light B5H1 is connected to a negative electrode of a control power supply; The emergency motor reversing indicator light circuit includes an indicator light B5H2, a first end of the indicator light B5H2 is connected to a second end of a second auxiliary normally open contact of the contactor B3KM5 via a second auxiliary normally open contact of the contactor B2KM4 and a third auxiliary normally open contact of the reversing contactor B2KM2, and a second end of the indicator light B5H2 is connected to a negative electrode of the control power supply; The low-speed brake solenoid valve start indicator light circuit includes an indicator light B5H4, a first end of the indicator light B5H4 is connected to the positive electrode of the control power supply via the third auxiliary normally open contact of the contactor B3KM5, and a second end of the indicator light B5H4 is connected to the negative electrode of the control power supply; The oil pump motor M2 start indicator light circuit includes an indicator light B5H3, a first end of the indicator light B5H3 is connected to the positive output end of the AC / DC converter AD via the second auxiliary normally open contact of the contactor B2KM3, and a second end of the indicator light B5H3 is connected to the negative electrode of the control power supply; The emergency motor stop indicator light circuit includes an indicator light B5H5, a first end of the indicator light B5H5 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the serially connected contactor B2KM4, the second auxiliary normally closed contact of the reverse contactor B2KM2, and the second auxiliary normally closed contact of the forward contactor B2KM1, and a second end of the indicator light B5H5 is connected to the negative electrode of the control power supply; The oil pump motor M2 stop indicator light circuit indicator light B5H6, the first end of the indicator light B5H6 is connected to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B2KM3, and the second end of the indicator light B5H6 is connected to the negative pole of the control power supply; The low-speed brake solenoid valve stop indicator light circuit indicator light B5H7, the first end of the indicator light B5H7 is connected in series to the positive output end of the AC / DC converter AD via the auxiliary normally closed contact of the contactor B3KM5, and the second end of the indicator light B5H7 is connected to the negative pole of the control power supply.

9. The quay crane pitching emergency system according to any one of claims 1 to 8, characterized in that: A three-phase maintenance socket circuit is also provided in the pitch emergency cabinet.

10. The quay crane pitching emergency system according to claim 9, characterized in that: The three-phase maintenance socket circuit includes a leakage switch Q6, a door limit D1, a capacitor C1 and an internal cabinet light LED; the first end of the leakage switch Q6 is connected to the power supply, the second end is connected to the maintenance socket, the positive output end of the other end is connected to the first end of the capacitor C1 through the door limit D1, the negative output end is connected to the second end of the capacitor C1, and the internal cabinet light LED is connected in parallel with the capacitor C1.

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