A crane remote control and manual control dual-purpose control circuit

Abstract

The present invention provides a crane remote control and manual control dual-purpose control circuit, which is used to solve the problems in the prior art that the crane remote control and manual control circuit design is complex, and the control system and operating system of the crane need to be equipped with high costs. The control circuit includes: a cam zero position protection branch, a mechanism protection branch, and a cam limit control branch. One end of the cam zero position protection branch is connected to a power supply, the other end of the cam zero position protection branch is connected to one end of an emergency stop switch, the other end of the emergency stop switch is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to a power supply, one end of the cam limit control branch is connected to a power supply, and the other end of the cam limit control branch is connected to a power supply. By adopting the control circuit, the interlocking of the crane remote control and manual control circuits can be realized, the circuit design is simple, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of crane circuit switching, and in particular to a crane remote control and manual control dual-purpose control circuit. Background Art

[0002] With the rapid development of industrialization, cranes have become the basic products of modern industry. Cranes are mainly used as industrial systems to transport materials and equipment.

[0003] In the past, the design of double-beam bridge cranes was equipped with a manual control room on the crane. The operator climbed onto the crane and operated the crane through the cam controller in the driver's cab. The operator moved the cam handle to connect the cam piece and energize the motor. With the continuous development of electronic technology, remote control of cranes has become a standard product for crane control. Remote control of cranes is easy to use, has high safety performance, reduces the number of operators, and operators can operate the crane by themselves to assemble workpieces and perform various operations.

[0004] At present, many companies have the problem of labor shortage, and in order to reduce the company's production management costs, they need to make technical changes to the crane equipment, and need to add a remote control system while keeping the original operation unchanged. The main problem is that remote control and manual operation are not allowed to operate a crane at the same time, so when adding a remote control control system, it is necessary to achieve interlocking safety between remote control and manual operation.

[0005] Furthermore, the remote control operation system should be combined with the limit protection and mechanism protection in the existing crane operation system to ensure the safety of crane operation when remote control operation is implemented.

[0006] In summary, it is necessary to propose a remote control and manual interlocking dual-use control circuit that can ensure the safe operation of the crane to solve the above problems. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a circuit that can ensure the protection of the crane mechanism and the limit protection while controlling and operating the crane through a remote control and manual dual-use interlocking control circuit.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A crane remote control and manual dual-purpose control circuit comprises a power supply, a key switch, a flashlight door switch, a remote control switch, a manual switch, an intermediate switch, an emergency stop switch and a conversion component, and also comprises a cam zero position protection branch, a mechanism protection branch and a cam limit control branch, wherein one end of the cam zero position protection branch is connected to the power supply, the other end of the cam zero position protection branch is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to the power supply, one end of the cam limit control branch is connected to the power supply, and the other end of the cam limit control branch is connected to the power supply.

[0010] Furthermore, the conversion component includes a conversion switch and a manually controlled intermediate relay K2.

[0011] Furthermore, one end of the key switch DS is connected to the power supply, the other end of the key switch DS is connected to one end of the flashlight door switch SB10, the other end of the flashlight door switch SB10 is connected to one end of the first manual switch K21, the other end of the first manual switch K21 is connected to one end of the cam zero position protection branch and one end of the second remote control switch K12, one end of the first remote control switch K11 is connected to the other end of the key switch DS and one end of the flashlight door switch SB10, the other end of the first remote control switch K11 is connected to the other end of the first manual switch K21 and one end of the cam zero position protection branch, the other end of the cam zero position protection branch is connected to one end of the second manual switch K22 and one end of the emergency stop switch SB12, and the emergency stop switch S The other end of B12 is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to one end of the intermediate relay K0, the other end of the intermediate relay K0 is connected to one end of the main relay KC and the power supply, the other end of the main relay KC is connected to one end of the third intermediate switch K03, the other end of the third intermediate switch K03 is connected to one end of the cam limit control branch and one end of the first intermediate switch K01, the other end of the cam limit control branch is connected to one end of the second intermediate switch K02, the other end of the second intermediate switch K02 is connected to the other end of the second remote control switch and the other end of the second manual switch, and the other end of the first intermediate switch K01 is connected to the other end of the key switch DS and one end of the flashlight switch SB10.

[0012] Further, the cam limit control branch includes: main hook lower limit 1SL1, main hook upper limit 1SL2, main hook limit switch 1SQ, main hook lifting switch KA1, main hook lowering switch KA2, first cam switch SA1; auxiliary hook upper limit 4SL1, auxiliary hook lower limit 4SL2, auxiliary hook lifting switch KD2, auxiliary hook lowering switch KD1, auxiliary hook limit switch 4SQ, fourth cam switch SA4; second cam switch SA2, trolley right switch KB2, trolley left switch KB1, trolley right limit 2SL1, trolley left limit 2SL2; trolley front limit 3SL1, trolley rear limit 3SL2, third cam switch SA3;The other end of the main hook lower limit 1SL1 is connected to one end of the first intermediate switch K01 and one end of the main hook upper limit 1SL2, the other end of the main hook lower limit 1SL1 is connected to one end of the main hook limit switch 1SQ, the other end of the main hook limit switch 1SQ is connected to one end of the main hook lowering switch KA2, the other end of the main hook lowering switch KA2 is connected to one end of the first switch of the first cam switch SA1, the other end of the first switch of the first cam switch SA1 is connected to one end of the auxiliary hook upper limit 4SL1, the other end of the auxiliary hook upper limit 4SL1 is connected to one end of the auxiliary hook limit switch 4SQ, and the other end of the auxiliary hook limit switch 4SQ is connected to one end of the auxiliary hook limit switch 4SQ. The auxiliary hook raising switch KD2 is connected to one end of the auxiliary hook raising switch KD2, the other end of the auxiliary hook raising switch KD2 is connected to one end of the first switch of the fourth cam switch SA4, the other end of the first switch of the fourth cam switch SA4 is connected to one end of the second switch of the fourth cam switch SA4 and one end of the second cam switch SA2, the other end of the second switch of the fourth cam switch SA4 is connected to one end of the auxiliary hook lowering switch KD1, the other end of the auxiliary hook lowering switch KD1 is connected to one end of the auxiliary hook lower limit 4SL2, the other end of the auxiliary hook lower limit 4SL2 is connected to one end of the second switch of the first cam switch SA1, and the other end of the second switch of the first cam switch SA1 is connected to One end of the main hook lifting switch KA1, the other end of the main hook lifting switch KA1 is connected to one end of the main hook upper limit 1SL2, the other end of the main hook upper limit 1SL2 is connected to one end of the main hook lower limit 1SL1 and the other end of the third intermediate switch K03, one end of the first switch of the second cam switch SA2 is connected to one end of the trolley right switch KB2, the other end of the trolley right switch KB2 is connected to one end of the trolley right limit 2SL1, the other end of the trolley right limit 2SL1 is connected to one end of the trolley front limit 3SL1 and the trolley rear limit 3SL2 and one end of the trolley left limit 2SL2, the other end of the trolley left limit 2SL2 is connected to the trolley left One end of switch KB1 and the other end of the trolley left switch KB1 are connected to one end of the second switch of the second cam switch SA2, the other end of the trolley front limit 3SL1 is connected to one end of the trolley rear switch KC2, the other end of the trolley rear switch KC2 is connected to one end of the first switch of the third cam switch SA3, the other end of the first switch of the third cam switch SA3 is connected to one end of the second switch of the third cam switch SA3 and one end of the second middle switch K02, the other end of the second switch of the third cam switch SA3 is connected to one end of the trolley front switch KC1, and the other end of the trolley front switch KC1 is connected to one end of the trolley rear limit 3SL2. ;

[0013] Furthermore, the cam zero position protection branch includes: a first cam zero position protection SA10, a second cam zero position protection SA20, a third cam zero position protection SA30, and a fourth cam zero position protection SA40, wherein one end of the first cam zero position protection SA10 is connected to the other end of the first manual switch K21, the other end of the first remote control switch K11, and one end of the second remote control switch K12, the other end of the first cam zero position protection SA10 is connected to one end of the fourth cam zero position protection SA40, the other end of the fourth cam zero position protection SA40 is connected to one end of the third cam zero position protection SA30, the other end of the third cam zero position protection SA30 is connected to one end of the second cam zero position protection SA20, and the other end of the second cam zero position protection SA20 is connected to one end of the emergency stop switch SB12 and one end of the second manual switch K22.

[0014] Furthermore, the mechanism protection branch includes: a first safety door switch SL1, a second safety door switch SL2, a third safety door switch SL3 and a fourth safety door switch SL4, a first main hook motor overcurrent protection switch 1FA1, a second main hook motor overcurrent protection switch 1FA2, a first trolley motor overcurrent protection switch 2FA1, a second trolley motor overcurrent protection switch 2FA2, a first trolley motor overcurrent protection switch 3FA1, a second trolley motor overcurrent protection switch 3FA2, a third trolley motor overcurrent protection switch 3FA3, a fourth trolley motor overcurrent protection switch 3FA4, a first auxiliary hook motor overcurrent protection switch 4FA1, a second auxiliary hook motor overcurrent protection switch Protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ; one end of the first safety door switch SL1 is connected to the other end of the emergency stop switch SB12, the other end of the first safety door switch SL1 is connected to one end of the second safety door switch SL2, the other end of the second safety door switch SL2 is connected to one end of the third safety door switch SL3, the other end of the third safety door switch SL3 is connected to one end of the fourth safety door switch SL4, the other end of the fourth safety door switch SL4 is connected to one end of the first main hook motor overcurrent protection switch 1FA1, the other end of the first main hook motor overcurrent protection switch 1FA1 and the second main hook motor overcurrent protection switch 1FA2, the other end of the second main hook motor overcurrent protection switch 1FA2 is connected to one end of the first trolley motor overcurrent protection switch 2FA1, the other end of the first trolley motor overcurrent protection switch 2FA1 is connected to one end of the second trolley motor overcurrent protection switch 2FA2, the other end of the second trolley motor overcurrent protection switch 2FA2 is connected to the first trolley motor overcurrent protection switch 3FA1, the other end of the first trolley motor overcurrent protection switch 3FA1 is connected to one end of the second trolley motor overcurrent protection switch 3FA2, the other end of the second trolley motor overcurrent protection switch 3FA2 is connected to one end of the third trolley motor overcurrent protection switch 3FA3 The other end of the third large car motor overcurrent protection switch 3FA3 is connected to one end of the fourth large car motor overcurrent protection switch 3FA4, the other end of the fourth large car motor overcurrent protection switch 3FA4 is connected to one end of the first auxiliary hook motor overcurrent protection switch 4FA1, the other end of the first auxiliary hook motor overcurrent protection switch 4FA1 is connected to one end of the second auxiliary hook motor overcurrent protection switch 4FA2, the other end of the second auxiliary hook motor overcurrent protection switch 4FA2 is connected to one end of the total overcurrent protection switch FA, the other end of the total overcurrent protection switch FA is connected to one end of the phase sequence protection switch XJ, and the other end of the phase sequence protection switch XJ is connected to one end of the intermediate relay K0.

[0015] Furthermore, it includes a remote control main control circuit, which includes: a remote control start control branch, a main hook raising control branch, a main hook lowering control branch, a trolley left control branch, a trolley right control branch, a truck front control branch, a truck rear control branch, an auxiliary hook raising control branch, and an auxiliary hook lowering control branch. The remote control start control branch, the main hook raising control branch, the main hook lowering control branch, the trolley left control branch, the trolley right control branch, the truck front control branch, the truck rear control branch, the auxiliary hook raising control branch, and the auxiliary hook lowering control branch are connected in parallel with each other.

[0016] The beneficial effects of the present invention are:

[0017] (1) It is possible to achieve interlocking safety between remote control operation and manual control operation, ensuring that the remote control operation and manual control operation will not control the crane at the same time, further improving the safety of the crane.

[0018] (2): Remote control operation and manual operation share the same set of limit protection circuits and mechanism protection circuits, which not only ensures the safety of remote control operation but also reduces costs.

[0019] (3): A set of remote control circuits and operating circuits are connected in parallel to the control system and operating system of the manual control crane, which greatly improves the service life of the control system, reduces the cost of transformation, reduces the employment cost of crane dedicated staff, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the schematic diagram of the remote control and manual control dual-use control circuit of this crane;

[0021] Figure 2 This is the operating circuit schematic diagram of the crane remote control;

[0022] Figure 3 This is a schematic diagram of the remote control of this crane. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Example

[0024] This embodiment provides a crane remote control and manual control dual-purpose control circuit, such as Figure 1As shown, it includes a crane remote control and manual dual-purpose control circuit, including a power supply, a key switch, a flashlight door switch, a remote control switch, a manual switch, an intermediate switch, an emergency stop switch and a conversion component, and also includes a cam zero position protection branch, a mechanism protection branch and a cam limit control branch. One end of the cam zero position protection branch is connected to the power supply, the other end of the cam zero position protection branch is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to the power supply, one end of the cam limit control branch is connected to the power supply, and the other end of the cam limit control branch is connected to the power supply.

[0025] Furthermore, the conversion component includes a conversion switch and a manually controlled intermediate relay K2.

[0026] Furthermore, one end of the key switch DS is connected to the power supply, the other end of the key switch DS is connected to one end of the flashlight door switch SB10, the other end of the flashlight door switch SB10 is connected to one end of the first manual switch K21, the other end of the first manual switch K21 is connected to one end of the cam zero position protection branch and one end of the second remote control switch K12, one end of the first remote control switch K11 is connected to the other end of the key switch DS and one end of the flashlight door switch SB10, the other end of the first remote control switch K11 is connected to the other end of the first manual switch K21 and one end of the cam zero position protection branch, the other end of the cam zero position protection branch is connected to one end of the second manual switch K22 and one end of the emergency stop switch SB12, and the emergency stop switch The other end of SB12 is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to one end of the intermediate relay K0, the other end of the intermediate relay K0 is connected to one end of the main relay KC and the power supply, the other end of the main relay KC is connected to one end of the third intermediate switch K03, the other end of the third intermediate switch K03 is connected to one end of the cam limit control branch and one end of the first intermediate switch K01, the other end of the cam limit control branch is connected to one end of the second intermediate switch K02, the other end of the second intermediate switch K02 is connected to the other end of the second remote control switch and one end of the second manual switch, and the other end of the first intermediate switch K01 is connected to the other end of the key switch DS and one end of the flashlight switch SB10.

[0027] In order to meet the interlocking safety between remote control and manual control, it is not allowed to control the crane in two modes at the same time. It is ensured that the remote control cannot be operated during manual control, and the manual control cannot be operated during remote control.

[0028] In this embodiment, a conversion switch is provided to control the coil of the intermediate relay K2. When manually operated, the conversion switch is turned to the manual position, the coil of the intermediate relay K2 is energized and attracted, and the first manual switch K21 and the second manual switch K22 are closed; the manual start button is pressed, and the circuit is started through the key switch DS—the first manual switch K21 (closed)—the first cam zero position protection SA10, the second cam zero position protection SA20, the third cam zero position protection SA30, the fourth cam zero position protection SA40 (4 mechanism cam zero position protection)—the emergency stop switch SB12 (closed)—the first safety door switch SL1, the second safety door switch SL2, the third safety door switch SL3 and the fourth safety door switch SL4 (safety door switch protection, the corresponding limit is closed after the safety door is closed)—the first main hook Motor overcurrent protection switch 1FA, second main hook motor overcurrent protection switch 1FA2, first trolley motor overcurrent protection switch 2FA1, second trolley motor overcurrent protection switch 2FA2, first trolley motor overcurrent protection switch 3FA1, second trolley motor overcurrent protection switch 3FA2, third trolley motor overcurrent protection switch 3FA3, fourth trolley motor overcurrent protection switch 3FA4, first auxiliary hook motor overcurrent protection switch 4FA1, second auxiliary hook motor overcurrent protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ (phase sequence protection, when powered on, the voltage is normal, there is no phase loss, and the phase sequence protection switch is closed when the phase is wrong), the intermediate relay K0 is energized, the first intermediate switch K01, the second intermediate switch K02 and the third intermediate switch K03 are turned on, and the total relay KC is attracted and self-locked. Each mechanism moves the cam handle until the cam piece is turned on, and the motor runs after power is turned on.

[0029] Among them, when manual control is performed, the conversion switch is turned to the manual control position, the coil of the intermediate relay K2 is energized and attracted, the normally closed point of the remote control power switch K24 is disconnected, and the remote control power supply is cut off, ensuring that the remote control cannot be operated during manual control.

[0030] During remote control operation, the conversion switch is turned to the remote control position, the intermediate relay K2 coil is de-energized, the remote control power switch K24 is closed, the remote control power is turned on, the remote control start button SB1 is pressed, the remote control start relay K1 coil is energized, the key switch DS—the first manual switch K21 (closed)—the first cam zero position protection SA10, the second cam zero position protection SA20, the third cam zero position protection SA30, the fourth cam zero position protection SA40 (4 mechanism cam zero position protection)—the emergency stop switch SB12 (closed)—the first safety door switch SL1, the second safety door switch SL2, the third safety door switch SL3 and the fourth safety door switch SL4 (safety door switch protection, the corresponding limit is closed after the safety door is closed)—the first main hook motor overcurrent protection switch 1FA, the second main hook motor overcurrent protection Switch 1FA2, first trolley motor overcurrent protection switch 2FA1, second trolley motor overcurrent protection switch 2FA2, first trolley motor overcurrent protection switch 3FA1, second trolley motor overcurrent protection switch 3FA2, third trolley motor overcurrent protection switch 3FA3, fourth trolley motor overcurrent protection switch 3FA4, first auxiliary hook motor overcurrent protection switch 4FA1, second auxiliary hook motor overcurrent protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ (phase sequence protection, when power is on, the voltage is normal, there is no phase loss, and the phase sequence protection switch is closed when the phase is wrong), the intermediate relay K0 is energized, the first intermediate switch K01, the second intermediate switch K02 and the third intermediate switch K03 are closed, the total relay is energized and self-locked, press the remote control buttons SB2~SB13, and the operating mechanism will operate.

[0031] During remote control operation, when the conversion switch is turned to the remote control position, the first manual switch K21 and the second manual switch K22 are disconnected, cutting off the manual control start circuit, ensuring that the manual control cannot be turned on during remote control operation.

[0032] By adopting this connection, the interlocking safety between remote control and manual control can be realized, and the remote control and manual control cannot control the crane at the same time, thus ensuring the safety of crane operation control.

[0033] Further, the cam limit control branch includes: main hook lower limit 1SL1, main hook upper limit 1SL2, main hook limit switch 1SQ, main hook lifting switch KA1, main hook lowering switch KA2, first cam switch SA1; auxiliary hook upper limit 4SL1, auxiliary hook lower limit 4SL2, auxiliary hook lifting switch KD2, auxiliary hook lowering switch KD1, auxiliary hook limit switch 4SQ, fourth cam switch SA4; second cam switch SA2, trolley right switch KB2, trolley left switch KB1, trolley right limit 2SL1, trolley left limit 2SL2; trolley front limit 3SL1, trolley rear limit 3SL2, third cam switch SA3;The other end of the main hook lower limit 1SL1 is connected to one end of the first intermediate switch K01 and one end of the main hook upper limit 1SL2, the other end of the main hook lower limit 1SL1 is connected to one end of the main hook limit switch 1SQ, the other end of the main hook limit switch 1SQ is connected to one end of the main hook lowering switch KA2, the other end of the main hook lowering switch KA2 is connected to one end of the first switch of the first cam switch SA1, the other end of the first switch of the first cam switch SA1 is connected to one end of the auxiliary hook upper limit 4SL1, the other end of the auxiliary hook upper limit 4SL1 is connected to one end of the auxiliary hook limit switch 4SQ, and the other end of the auxiliary hook limit switch 4SQ is connected to one end of the auxiliary hook limit switch 4SQ. The auxiliary hook raising switch KD2 is connected to one end of the auxiliary hook raising switch KD2, the other end of the auxiliary hook raising switch KD2 is connected to one end of the first switch of the fourth cam switch SA4, the other end of the first switch of the fourth cam switch SA4 is connected to one end of the second switch of the fourth cam switch SA4 and one end of the second cam switch SA2, the other end of the second switch of the fourth cam switch SA4 is connected to one end of the auxiliary hook lowering switch KD1, the other end of the auxiliary hook lowering switch KD1 is connected to one end of the auxiliary hook lower limit 4SL2, the other end of the auxiliary hook lower limit 4SL2 is connected to one end of the second switch of the first cam switch SA1, and the other end of the second switch of the first cam switch SA1 is connected to One end of the main hook lifting switch KA1, the other end of the main hook lifting switch KA1 is connected to one end of the main hook upper limit 1SL2, the other end of the main hook upper limit 1SL2 is connected to one end of the main hook lower limit 1SL1 and the other end of the third intermediate switch K03, one end of the first switch of the second cam switch SA2 is connected to one end of the trolley right switch KB2, the other end of the trolley right switch KB2 is connected to one end of the trolley right limit 2SL1, the other end of the trolley right limit 2SL1 is connected to one end of the trolley front limit 3SL1 and the trolley rear limit 3SL2 and one end of the trolley left limit 2SL2, the other end of the trolley left limit 2SL2 is connected to the trolley left One end of switch KB1 and the other end of the trolley left switch KB1 are connected to one end of the second switch of the second cam switch SA2, the other end of the trolley front limit 3SL1 is connected to one end of the trolley rear switch KC2, the other end of the trolley rear switch KC2 is connected to one end of the first switch of the third cam switch SA3, the other end of the first switch of the third cam switch SA3 is connected to one end of the second switch of the third cam switch SA3 and one end of the second middle switch K02, the other end of the second switch of the third cam switch SA3 is connected to one end of the trolley front switch KC1, and the other end of the trolley front switch KC1 is connected to one end of the trolley rear limit 3SL2. ;

[0034] Furthermore, the cam zero position protection branch includes: a first cam zero position protection SA10, a second cam zero position protection SA20, a third cam zero position protection SA30, and a fourth cam zero position protection SA40, wherein one end of the first cam zero position protection SA10 is connected to the other end of the first manual switch K21, the other end of the first remote control switch K11, and one end of the second remote control switch K12, the other end of the first cam zero position protection SA10 is connected to one end of the fourth cam zero position protection SA40, the other end of the fourth cam zero position protection SA40 is connected to one end of the third cam zero position protection SA30, the other end of the third cam zero position protection SA30 is connected to one end of the second cam zero position protection SA20, and the other end of the second cam zero position protection SA20 is connected to one end of the emergency stop switch SB12 and one end of the second manual switch K22.

[0035] Furthermore, the mechanism protection branch includes: a first safety door switch SL1, a second safety door switch SL2, a third safety door switch SL3 and a fourth safety door switch SL4, a first main hook motor overcurrent protection switch 1FA1, a second main hook motor overcurrent protection switch 1FA2, a first trolley motor overcurrent protection switch 2FA1, a second trolley motor overcurrent protection switch 2FA2, a first trolley motor overcurrent protection switch 3FA1, a second trolley motor overcurrent protection switch 3FA2, a third trolley motor overcurrent protection switch 3FA3, a fourth trolley motor overcurrent protection switch 3FA4, a first auxiliary hook motor overcurrent protection switch 4FA1, a second auxiliary hook motor overcurrent protection switch Protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ; one end of the first safety door switch SL1 is connected to the other end of the emergency stop switch SB12, the other end of the first safety door switch SL1 is connected to one end of the second safety door switch SL2, the other end of the second safety door switch SL2 is connected to one end of the third safety door switch SL3, the other end of the third safety door switch SL3 is connected to one end of the fourth safety door switch SL4, the other end of the fourth safety door switch SL4 is connected to one end of the first main hook motor overcurrent protection switch 1FA1, the other end of the first main hook motor overcurrent protection switch 1FA1 and the second main hook motor overcurrent protection switch 1FA2, the other end of the second main hook motor overcurrent protection switch 1FA2 is connected to one end of the first trolley motor overcurrent protection switch 2FA1, the other end of the first trolley motor overcurrent protection switch 2FA1 is connected to one end of the second trolley motor overcurrent protection switch 2FA2, the other end of the second trolley motor overcurrent protection switch 2FA2 is connected to the first trolley motor overcurrent protection switch 3FA1, the other end of the first trolley motor overcurrent protection switch 3FA1 is connected to one end of the second trolley motor overcurrent protection switch 3FA2, the other end of the second trolley motor overcurrent protection switch 3FA2 is connected to one end of the third trolley motor overcurrent protection switch 3FA3 The other end of the third large car motor overcurrent protection switch 3FA3 is connected to one end of the fourth large car motor overcurrent protection switch 3FA4, the other end of the fourth large car motor overcurrent protection switch 3FA4 is connected to one end of the first auxiliary hook motor overcurrent protection switch 4FA1, the other end of the first auxiliary hook motor overcurrent protection switch 4FA1 is connected to one end of the second auxiliary hook motor overcurrent protection switch 4FA2, the other end of the second auxiliary hook motor overcurrent protection switch 4FA2 is connected to one end of the total overcurrent protection switch FA, the other end of the total overcurrent protection switch FA is connected to one end of the phase sequence protection switch XJ, and the other end of the phase sequence protection switch XJ is connected to one end of the intermediate relay K0.

[0036] Furthermore, it includes a remote control main control circuit, which includes: a remote control start control branch, a main hook raising control branch, a main hook lowering control branch, a trolley left control branch, a trolley right control branch, a truck front control branch, a truck rear control branch, an auxiliary hook raising control branch, and an auxiliary hook lowering control branch. The remote control start control branch, the main hook raising control branch, the main hook lowering control branch, the trolley left control branch, the trolley right control branch, the truck front control branch, the truck rear control branch, the auxiliary hook raising control branch, and the auxiliary hook lowering control branch are connected in parallel with each other.

[0037] Both the manually controlled crane and the remote controlled crane need to meet safety requirements, that is, the protection of each mechanism during operation and the limit protection of each mechanism during operation need to be met. Therefore, in this embodiment, the remote control switch is connected in parallel to the corresponding cam switch to ensure the protection of each mechanism when the remote control crane is realized.

[0038] The specific principles are as follows:

[0039] During manual control, the principle of realizing the limit disconnection circuit of each mechanism is as follows: the coil of the main relay KC is energized, through the third intermediate switch K03, and then through one end of the key switch DS to one end of the first intermediate switch K01 to the cam limit control branch to the second manual switch K22 to the emergency stop switch SB12 (closed) to the first safety door switch SL1, the second safety door switch SL2, the third safety door switch SL3 and the fourth safety door switch SL4 (safety door switch protection, the corresponding limit is closed after the safety door is closed) to the first main hook motor overcurrent protection switch 1FA, the second main hook motor overcurrent protection switch 1FA2, the first trolley motor overcurrent protection switch 2FA 1. The second trolley motor overcurrent protection switch 2FA2, the first trolley motor overcurrent protection switch 3FA1, the second trolley motor overcurrent protection switch 3FA2, the third trolley motor overcurrent protection switch 3FA3, the fourth trolley motor overcurrent protection switch 3FA4, the first auxiliary hook motor overcurrent protection switch 4FA1, the second auxiliary hook motor overcurrent protection switch 4FA2, the total overcurrent protection switch FA, the phase sequence protection switch XJ (phase sequence protection, when powered on, the voltage is normal, there is no phase loss, and the phase sequence protection switch is closed when the phase is wrong), the intermediate relay K0 is energized, the first intermediate switch K01, the second intermediate switch K02 and the third intermediate switch K03 are closed to form a self-locking circuit.

[0040] When the main relay KC is disconnected, the self-locking circuit must be disconnected. Assume that the main hook lower limit 1SL1 is disconnected, that is, the first intermediate switch K01 is disconnected, and line 67 is disconnected. When the cam is in zero position, the main relay KC is closed. When the cam handle is operated in the upward direction, the cam zero position is disconnected, and the second switch of the first cam switch SA1 is disconnected, so that line 65 is disconnected, thereby cutting off the self-locking circuit, and the main relay KC loses power. The crane stops the hook from moving upward, and the hook rises to limit protection.

[0041] During remote control, the principle of realizing the limit disconnection circuit of each mechanism is as follows: receiving the start signal of the remote control pressing the start button SB1, the main relay KC coil is energized and attracted, through the third intermediate switch K03, and then through one end of the key switch DS to one end of the first intermediate switch K01 to the cam limit control branch to the second manual switch K22 to the emergency stop switch SB12 (closed) to the first safety door switch SL1, the second safety door switch SL2, the third safety door switch SL3 and the fourth safety door switch SL4 (safety door switch protection, the corresponding limit is closed after the safety door is closed) to the first main hook motor overcurrent protection switch 1FA, the second main hook motor overcurrent protection switch 1FA2, the first trolley Motor overcurrent protection switch 2FA1, second trolley motor overcurrent protection switch 2FA2, first trolley motor overcurrent protection switch 3FA1, second trolley motor overcurrent protection switch 3FA2, third trolley motor overcurrent protection switch 3FA3, fourth trolley motor overcurrent protection switch 3FA4, first auxiliary hook motor overcurrent protection switch 4FA1, second auxiliary hook motor overcurrent protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ (phase sequence protection, when power is on, the voltage is normal, there is no phase loss, and the phase sequence protection switch is closed when the phase is wrong), the intermediate relay K0 is energized, the first intermediate switch K01, the second intermediate switch K02 and the third intermediate switch K03 are closed to form a self-locking circuit.

[0042] When the main relay KC is disconnected, the self-locking circuit must be disconnected. Assuming that the main hook runs to the main hook upper limit position 1SL2, at this time, the main hook upper limit position 1SL2, that is, the first intermediate switch K01 is disconnected, and when the SB2 button signal transmitted by the remote control is received, the main hook lifting relay KA1 is energized and energized, and the main hook lifting switch KA1 is disconnected, cutting off the self-locking circuit, and the main relay KC coil loses power, and the hook rises to limit protection.

[0043] The control circuit for both remote control and manual control of the crane provided in this embodiment can realize the interlocking safety between remote control operation and manual control operation, ensuring that the remote control operation and manual control operation will not control the crane at the same time, further improving the safety of the crane. The remote control operation and manual control operation share the same set of limit protection circuits and mechanism protection circuits, which not only realizes the safety of remote control operation but also reduces the cost. Furthermore, a set of remote control circuits and operating circuits are connected in parallel to the control system and operating system of the manually controlled crane, which greatly improves the service life of the control system, has a low modification cost, reduces the employment cost of the crane's dedicated staff, and improves work efficiency.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A crane remote control and manual control dual-purpose control circuit, including a power supply, a key switch, a flashlight door switch, a remote control switch, a manual switch, an intermediate switch, an emergency stop switch and a conversion component, characterized in that: It also includes a cam zero position protection branch, a mechanism protection branch and a cam limit control branch, one end of the cam zero position protection branch is connected to a power supply, the other end of the cam zero position protection branch is connected to one end of an emergency stop switch, the other end of the emergency stop switch is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to a power supply, one end of the cam limit control branch is connected to a power supply, and the other end of the cam limit control branch is connected to a power supply; The conversion assembly includes a conversion switch and a manual control intermediate relay K2; when the conversion switch is turned to the manual control position during manual control, the coil of the manual control intermediate relay K2 is energized and attracted; when the conversion switch is turned to the remote control position during remote control, the coil of the manual control intermediate relay K2 is de-energized; One end of the key switch DS is connected to the power supply, the other end of the key switch DS is connected to one end of the flashlight door switch SB10, the other end of the flashlight door switch SB10 is connected to one end of the first manual switch K21, the other end of the first manual switch K21 is connected to one end of the cam zero position protection branch and one end of the second remote control switch K12, one end of the first remote control switch K11 is connected to the other end of the key switch DS and one end of the flashlight door switch SB10, the other end of the first remote control switch K11 is connected to the other end of the first manual switch K21 and one end of the cam zero position protection branch, the other end of the cam zero position protection branch is connected to one end of the second manual switch K22 and one end of the emergency stop switch SB12, and the emergency stop switch SB12 is connected to the other end of the key switch DS and one end of the flashlight door switch SB10. The other end of 2 is connected to one end of the mechanism protection branch, the other end of the mechanism protection branch is connected to one end of the intermediate relay K0, the other end of the intermediate relay K0 is connected to one end of the main relay KC and the power supply, the other end of the main relay KC is connected to one end of the third intermediate switch K03, the other end of the third intermediate switch K03 is connected to one end of the cam limit control branch and one end of the first intermediate switch K01, the other end of the cam limit control branch is connected to one end of the second intermediate switch K02, the other end of the second intermediate switch K02 is connected to the other end of the second remote control switch and the other end of the second manual switch, and the other end of the first intermediate switch K01 is connected to the other end of the key switch DS and one end of the flashlight switch SB10.

2. A crane remote control and manual control dual-purpose control circuit according to claim 1, characterized in that: The cam limit control branch includes: main hook lower limit 1SL1, main hook upper limit 1SL2, main hook limit switch 1SQ, main hook lifting switch KA1, main hook lowering switch KA2, first cam switch SA1; auxiliary hook upper limit 4SL1, auxiliary hook lower limit 4SL2, auxiliary hook lifting switch KD2, auxiliary hook lowering switch KD1, auxiliary hook limit switch 4SQ, fourth cam switch SA4; second cam switch SA2, trolley right switch KB2, trolley left switch KB1, trolley right limit 2SL1, trolley left limit 2SL2; trolley front limit 3SL1, trolley rear limit 3SL2, third cam switch SA3;The other end of the main hook lower limit 1SL1 is connected to one end of the first intermediate switch K01 and one end of the main hook upper limit 1SL2, the other end of the main hook lower limit 1SL1 is connected to one end of the main hook limit switch 1SQ, the other end of the main hook limit switch 1SQ is connected to one end of the main hook lowering switch KA2, the other end of the main hook lowering switch KA2 is connected to one end of the first switch of the first cam switch SA1, the other end of the first switch of the first cam switch SA1 is connected to one end of the auxiliary hook upper limit 4SL1, the other end of the auxiliary hook upper limit 4SL1 is connected to one end of the auxiliary hook limit switch 4SQ, and the other end of the auxiliary hook limit switch 4SQ is connected to one end of the auxiliary hook limit switch 4SQ. The auxiliary hook raising switch KD2 is connected to one end of the auxiliary hook raising switch KD2, the other end of the auxiliary hook raising switch KD2 is connected to one end of the first switch of the fourth cam switch SA4, the other end of the first switch of the fourth cam switch SA4 is connected to one end of the second switch of the fourth cam switch SA4 and one end of the second cam switch SA2, the other end of the second switch of the fourth cam switch SA4 is connected to one end of the auxiliary hook lowering switch KD1, the other end of the auxiliary hook lowering switch KD1 is connected to one end of the auxiliary hook lower limit 4SL2, the other end of the auxiliary hook lower limit 4SL2 is connected to one end of the second switch of the first cam switch SA1, and the other end of the second switch of the first cam switch SA1 is connected to One end of the main hook lifting switch KA1, the other end of the main hook lifting switch KA1 is connected to one end of the main hook upper limit 1SL2, the other end of the main hook upper limit 1SL2 is connected to one end of the main hook lower limit 1SL1 and the other end of the third intermediate switch K03, one end of the first switch of the second cam switch SA2 is connected to one end of the trolley right switch KB2, the other end of the trolley right switch KB2 is connected to one end of the trolley right limit 2SL1, the other end of the trolley right limit 2SL1 is connected to one end of the trolley front limit 3SL1 and the trolley rear limit 3SL2 and one end of the trolley left limit 2SL2, the other end of the trolley left limit 2SL2 is connected to the trolley left One end of switch KB1 and the other end of the trolley left switch KB1 are connected to one end of the second switch of the second cam switch SA2, the other end of the trolley front limit 3SL1 is connected to one end of the trolley rear switch KC2, the other end of the trolley rear switch KC2 is connected to one end of the first switch of the third cam switch SA3, the other end of the first switch of the third cam switch SA3 is connected to one end of the second switch of the third cam switch SA3 and one end of the second middle switch K02, the other end of the second switch of the third cam switch SA3 is connected to one end of the trolley front switch KC1, and the other end of the trolley front switch KC1 is connected to one end of the trolley rear limit 3SL2. ; 3. A crane remote control and manual control dual-purpose control circuit according to claim 1, characterized in that: The cam zero position protection branch includes: a first cam zero position protection SA10, a second cam zero position protection SA20, a third cam zero position protection SA30, and a fourth cam zero position protection SA40, wherein one end of the first cam zero position protection SA10 is connected to the other end of the first manual switch K21, the other end of the first remote control switch K11, and one end of the second remote control switch K12, the other end of the first cam zero position protection SA10 is connected to one end of the fourth cam zero position protection SA40, the other end of the fourth cam zero position protection SA40 is connected to one end of the third cam zero position protection SA30, the other end of the third cam zero position protection SA30 is connected to one end of the second cam zero position protection SA20, and the other end of the second cam zero position protection SA20 is connected to one end of the emergency stop switch SB12 and one end of the second manual switch K22.

4. A crane remote control and manual control dual-purpose control circuit according to claim 1, characterized in that: The mechanism protection branch includes: the first safety door switch SL1, the second safety door switch SL2, the third safety door switch SL3 and the fourth safety door switch SL4, the first main hook motor overcurrent protection switch 1FA1, the second main hook motor overcurrent protection switch 1FA2, the first trolley motor overcurrent protection switch 2FA1, the second trolley motor overcurrent protection switch 2FA2, the first trolley motor overcurrent protection switch 3FA1, the second trolley motor overcurrent protection switch 3FA2, the third trolley motor overcurrent protection switch 3FA3, the fourth trolley motor overcurrent protection switch 3FA4, the first auxiliary hook motor overcurrent protection switch 4FA1, the second auxiliary hook motor overcurrent protection switch 4FA2, total overcurrent protection switch FA, phase sequence protection switch XJ; one end of the first safety door switch SL1 is connected to the other end of the emergency stop switch SB12, the other end of the first safety door switch SL1 is connected to one end of the second safety door switch SL2, the other end of the second safety door switch SL2 is connected to one end of the third safety door switch SL3, the other end of the third safety door switch SL3 is connected to one end of the fourth safety door switch SL4, the other end of the fourth safety door switch SL4 is connected to one end of the first main hook motor overcurrent protection switch 1FA1, the other end of the first main hook motor overcurrent protection switch 1FA1 and the second main hook motor overcurrent protection switch 1FA 2, the other end of the second main hook motor overcurrent protection switch 1FA2 is connected to one end of the first trolley motor overcurrent protection switch 2FA1, the other end of the first trolley motor overcurrent protection switch 2FA1 is connected to one end of the second trolley motor overcurrent protection switch 2FA2, the other end of the second trolley motor overcurrent protection switch 2FA2 is connected to the first trolley motor overcurrent protection switch 3FA1, the other end of the first trolley motor overcurrent protection switch 3FA1 is connected to one end of the second trolley motor overcurrent protection switch 3FA2, the other end of the second trolley motor overcurrent protection switch 3FA2 is connected to one end of the third trolley motor overcurrent protection switch 3FA3, The other end of the third large car motor overcurrent protection switch 3FA3 is connected to one end of the fourth large car motor overcurrent protection switch 3FA4, the other end of the fourth large car motor overcurrent protection switch 3FA4 is connected to one end of the first auxiliary hook motor overcurrent protection switch 4FA1, the other end of the first auxiliary hook motor overcurrent protection switch 4FA1 is connected to one end of the second auxiliary hook motor overcurrent protection switch 4FA2, the other end of the second auxiliary hook motor overcurrent protection switch 4FA2 is connected to one end of the total overcurrent protection switch FA, the other end of the total overcurrent protection switch FA is connected to one end of the phase sequence protection switch XJ, and the other end of the phase sequence protection switch XJ is connected to one end of the intermediate relay K0.

5. A crane remote control and manual control dual-purpose control circuit according to claim 1, characterized in that: It includes a remote control main control circuit, which includes: a remote control start control branch, a main hook raising control branch, a main hook lowering control branch, a trolley left control branch, a trolley right control branch, a truck front control branch, a truck rear control branch, an auxiliary hook raising control branch, and an auxiliary hook lowering control branch. The remote control start control branch, the main hook raising control branch, the main hook lowering control branch, the trolley left control branch, the trolley right control branch, the truck front control branch, the truck rear control branch, the auxiliary hook raising control branch, and the auxiliary hook lowering control branch are connected in parallel with each other.

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