CN111342708B - Electrical interlocking control system for double-drive hoist - Google Patents

Electrical interlocking control system for double-drive hoist Download PDF

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Publication number
CN111342708B
CN111342708B CN202010048460.7A CN202010048460A CN111342708B CN 111342708 B CN111342708 B CN 111342708B CN 202010048460 A CN202010048460 A CN 202010048460A CN 111342708 B CN111342708 B CN 111342708B
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China
Prior art keywords
contactor
relay
normally open
control circuit
main transmission
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CN111342708A (en
Inventor
汤论发
谢林坡
王礼龙
王湛
刘荣春
施其元
王其辉
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Anhui Conch Construction Materials Design Institute Co Ltd
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Anhui Conch Construction Materials Design Institute Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/066—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems characterised by the use of dynamo-electric machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Multiple Motors (AREA)
  • Elevator Control (AREA)

Abstract

The invention discloses an electric interlocking control system of a double-drive elevator, which comprises a DCS, a main transmission control circuit and an auxiliary transmission control circuit, wherein the output end of the DCS is respectively connected with the main transmission control circuit and the auxiliary transmission control circuit and is used for driving the main transmission control circuit and the auxiliary transmission control circuit to work, and contacts of a contactor are arranged between the main transmission control circuit and the auxiliary transmission control circuit to interlock so that the main transmission control circuit and the auxiliary transmission control circuit cannot work simultaneously. The invention has the advantages of providing the interlocking control system of the double-drive elevator with simple and reliable structure, which is used for preventing the parallel operation from causing accident expansion in the operation and maintenance processes of the elevator, ensuring the safety of equipment, improving the operation and maintenance safety of the elevator and preventing misoperation.

Description

Electrical interlocking control system of double-drive elevator
Technical Field
The invention relates to the field of electrical interlocking safety control, in particular to an electrical interlocking control system of a double-drive elevator.
Background
The high-power elevator is used in a plurality of processes of the novel cement production line, the stability of equipment is considered, double-drive elevators are configured by some manufacturers, the double-drive elevators are the elevators of the double-set main driving motor and the two sets of auxiliary transmission systems, the reliability of the system can be greatly improved by the mode, but how to realize the interlocking control between the main driving motor and the auxiliary transmission motor of the double-drive elevator is important for the normal and safe operation of the double-drive elevator. Therefore, the technical scheme of the application designs an electric interlocking control system of the double-drive elevator, which is used for realizing the interlocking control of the system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electric interlocking control system of a double-drive elevator.
In order to achieve the purpose, the technical scheme adopted by the invention is that the electric interlocking control system of the double-drive elevator comprises a DCS, a main transmission control circuit and an auxiliary transmission control circuit, wherein the output end of the DCS is respectively connected with the main transmission control circuit and the auxiliary transmission control circuit and used for driving the main transmission control circuit and the auxiliary transmission control circuit to work, and contacts of a contactor are arranged between the main transmission control circuit and the auxiliary transmission control circuit to interlock so that the main transmission control circuit and the auxiliary transmission control circuit cannot work simultaneously.
The main transmission control circuit comprises a main transmission motor M1 and a main transmission motor M2, three-phase electricity is supplied to the main transmission motor M1 after passing through a normally open contact of a contactor KM1, a current transformer is arranged at a power supply input end of the main transmission motor M1 to detect input current of the motor, an output end of the main transmission motor M1 is connected with a thermal relay KH1, an output end of the thermal relay KH1 is connected with a power transmitter, an output end of the power transmitter is connected with a DCS, the three-phase electricity L1 is connected with a leading-out terminal and then is connected with an N line through a coil of a relay K1, the three-phase electricity is supplied to the main transmission motor M2 after passing through a normally open contact of the contactor KM2, a current transformer is arranged at a power supply input end of the main transmission motor M1, an output end of the current transformer is connected with the thermal relay KH2, an output end of the thermal relay KH2 is connected with the power transmitter, an output end of the power transmitter is connected with the DCS 1 through a three-phase electricity L1 to one end of the leading-out terminal, the other end of the switch S2 is respectively connected with a coil of the relay K2 and a switch box ALB2, the three-phase electricity L2 is connected with a normally closed button 2 through a normally closed button B2, the normally closed button is connected with the normally closed button S2 of the normally closed button of the switch 2, the normally open button is connected with the normally open button of the switch 1 through the switch 2, the normally open button is connected with the normally open button of the switch 1, the normally open button is connected with the normally open button of the switch 1, the switch 1 through the normally open button is connected with the normally open button through the switch 1, the normally open button is connected with the normally open button through the switch 1 after the switch 1, the switch 1 through the switch 1 and the switch button is connected through the input button, the switch through the 3 through the input button through the 3 after the switch through the input button, the normally-closed contact is connected in parallel between the N line and a coil of a relay KM1, two ends of the coil of the relay KM1 are connected in parallel with a coil of a relay KM2, a driving serial port DO of the DCS is connected with the N line after passing through a coil of a relay K, a backup output port of the DCS is connected with a COM1 port of the DCS through a breaker Q11 after passing through a normally-open contact of the relay K1 and a normally-open contact of the K2 in sequence, and a response output end of the DCS is connected to the breaker Q11 after passing through a normally-open contact of the contactor KM1 and a normally-open contact of the KM 2.
The normally open contact of the contactor KM1 and the normally open contact of the contactor KM2 are connected in series and then connected in parallel at two ends of the button S2.
The auxiliary transmission control circuit comprises an auxiliary transmission motor M3 and a motor M4, wherein three-phase electricity is connected with the motor M3 through a normally open contact of a contactor KM3, the three-phase electricity is connected with the motor M4 through a normally open contact of the contactor KM4, a wiring terminal is led out between the three-phase electricity and the normally open contact of the contactor KM1 and connected with one end of a button S31, the wiring terminal is led out between the three-phase electricity and the normally open contact of the contactor KM2 and connected with one end of the button S31, the other end of the S31 is connected with the coil of the contactor KM4, the button S41 is connected in parallel with two ends of the S31, the normally open contact of the contactor KM4 is connected in parallel with two ends of the coil of the contactor KM4, the coil of the contactor KM3 is connected with an N line after passing through a normally closed contact of a thermal relay KH3, a normally closed contact of KH4 and a normally open contact of K3 which are mutually connected in series, the thermal relay KH3 is arranged at the power supply input end of the M3, the normally open contact of the thermal relay KH4 is arranged at the power supply input end of M4, the normally open contact of the contactor KM1 is connected in series with the normally open contact of the contactor KM 3.
The response interface of the DCS is connected with the COM port of the DCS after passing through the normally open contact of KM3, the normally open contact of KM4 and the breaker Q12 which are mutually connected in series.
The invention has the advantages of providing the interlocking control system of the double-drive elevator with simple and reliable structure, which is used for preventing the parallel operation from causing accident expansion in the operation and maintenance processes of the elevator, ensuring the safety of equipment, improving the operation and maintenance safety of the elevator and preventing misoperation.
Drawings
The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic diagram of a control circuit of a main motor of the present invention;
FIG. 2 is a schematic diagram of the DCS end circuit connection of the main transmission motor of the invention;
FIG. 3 is a control circuit diagram of the auxiliary transmission motor of the present invention;
Fig. 4 is a schematic diagram of a DCS end disconnection connection of the auxiliary transmission motor of the present invention.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings, which illustrate preferred embodiments of the invention in further detail.
In the design, in order to ensure that accidents are expanded due to parallel operation in the operation and maintenance processes of the elevator, an electrical interlocking system between two main transmission low-voltage drawer loops and an electrical interlocking between two main transmission and auxiliary transmission low-voltage drawer loops are added, the interlocking system can prevent parallel operation risks, ensure safe operation of the main transmission and the auxiliary transmission, ensure that the auxiliary transmission cannot operate in normal main transmission operation, and ensure safe operation due to auxiliary transmission operation in maintenance. In order to ensure that the double motors can be started simultaneously, the design adopts a set of control system shared by the two main low-voltage transmission drawer loops.
The utility model provides an electric interlock control system of double drive lifting machine, including DCS, main transmission control circuit, assist and pass control circuit, the DCS is used for realizing to main transmission control circuit, assist and pass control circuit's control and control etc. in order to realize to main transmission and assist the control that passes, but realize both simultaneous workings, set up interlock structure between main transmission control circuit and the assist and pass control circuit, carry out the interlock setting through the normally open contact of main transmission and assisting the contactor that corresponds, thereby realize main transmission during operation through the mode of circuit electric lock that assist pass and do not work, assist and pass during operation main transmission and do not work, main transmission control circuit with set up between the assistance passes control circuit and carry out the interlock through the contact of contactor so that both can not work simultaneously.
As shown in fig. 1, the main transmission control circuit comprises a main transmission motor M1 and a main transmission motor M2, three-phase power is supplied to the main transmission motor M1 after passing through normally open contacts of a circuit breaker Q1 and a contactor KM1, the normally open contacts of the Q and KM1 are connected in series, a current transformer is arranged at a power supply input end of the main transmission motor M1 to detect input current of the motor, an output end of the main transmission motor M1 is connected with a thermal relay KH1, an output end of the thermal relay KH1 is connected with a power transmitter BW, an ammeter and the like, and an output end of the power transmitter is connected with a DCS for uploading monitoring data to the DCS system. The three-phase electric L1 between the circuit breaker Q1 and the contactor KM1 is led out of a wiring terminal and then connected with N lines through a coil of a relay K1, an indicator lamp HL1 is connected in parallel at two ends of the coil of the relay K1 and used for giving an electrifying operation indication signal, three-phase electric is supplied to a main transmission motor M2 through a circuit breaker Q2 and a normally open contact of the contactor KM2, a current transformer is arranged at a power supply input end of the main transmission motor M2 and used for detecting input current of the motor, an output end of the current transformer is connected with a thermal relay KH2, the output end of the thermal relay KH2 is connected with devices such as a power transmitter, an ammeter and the like, the output end of the power transmitter is connected with a DCS system, the output end of the power transmitter is used for uploading monitoring power and the like into the DCS, the three-phase electric L1 phase leading-out wiring terminal connected with the M2 is connected with one end of the switch S2, the other end of the switch S2 is respectively connected with one end of the indicator lamp HL2 and a switch box ALB2, the other end of the indicator lamp HL2 is connected with the N lines, the switch box ALB2 is connected with an input end of the switch box ALB1 through an ELB-73, the output end of the switch ALB2 is connected with the normally closed contact of the switch box ALB2, the normally closed contact of the switch 1 is connected with the normally open contact of the switch 1, the switch 1 is connected with the switch 1 through the switch 1N 1 through the other end of the switch 1 through the switch 1, the normally open contact of the relay K1 is connected with the N line, the power supply loop relay of the auxiliary transmission motor comprises KM3 and KM4 which are used for respectively controlling the power supply of the auxiliary transmission motor M3 and M4, the normally closed contacts of the relay K1 are connected in parallel and then connected between the N line and a coil of the relay KM1, the coil of the relay KM2 is connected in parallel at two ends of the coil of the relay KM1, the indicator lamp HL3 is connected in parallel at two ends of the coil, and the normally open contact of the contactor KM1 and the normally open contact of the contactor KM2 are connected in series and then connected in parallel at two ends of the button S2.
As shown in figure 2, a driving serial port DO of the DCS is connected with an N line after passing through a coil of a relay K, a ready output port of the DCS is connected with a COM1 port of the DCS through a breaker Q11 after passing through a normally open contact of the relay K1 and a normally open contact of the relay K2 in sequence, and a response output end of the DCS is connected to the breaker Q11 after passing through a normally open contact of a contactor KM1 and a normally open contact of the contactor KM 2. The normally open contact of the contactor KM1 and the normally open contact of the contactor KM2 are connected in series and then connected in parallel at two ends of the button S2.
As shown in fig. 3, the auxiliary transmission control circuit comprises an auxiliary transmission motor M3 and a motor M4, three-phase electricity is connected with the motor M3 sequentially through a breaker Q3 and a normally open contact of a contactor KM3, the three-phase electricity is connected with the motor M4 sequentially through the breaker Q4 and the normally open contact of the contactor KM4, a wiring terminal is led out between the three-phase electricity and the normally open contact of the KM1 and is connected with one end of a button S31, the other end of the S31 is connected with the coil of the contactor KM4, the button S41 is connected in parallel with two ends of the S31, the normally open contact of the contactor KM4 is connected in parallel with two ends of the coil of the KM4, the coil of the contactor KM3 sequentially passes through a normally closed contact of a thermal relay KH3, a normally closed contact of KH4 and a normally open contact of K3 which are mutually connected in series, the other end of the normally open contact of the thermal relay KH3 is connected with the N line, the other end of the coil of the relay K3 is connected with the N line, the other end of the normally open contact of the relay KH4 is arranged at the power supply input end of the M4, the normally open contact of the contactor KM3 is used for realizing the large and small input current of the contactor KM3 is connected in series with the normally open contact of the contactor KM 3. As shown in fig. 4, the response interface of the DCS is connected to the COM port of the DCS via the normally open contact of KM3, the normally open contact of KM4, and the circuit breaker Q12, which are connected in series. Wherein S31, S41 can be implemented by two types of ELB-72 button boxes, respectively, and the ELB-72 button box comprises two buttons, and the wiring mode of the two buttons is shown in figure 3.
The control principle of the application is that after the main transmission breakers Q1 and Q2 are closed, the on-site button boxes ALB1 and ALB2 are both closed, the K1 and K2 coils are electrified, the normally open contacts are closed, the ready signal at the DCS end is conducted, the DCS end can display that the work is in ready state, when the S2 of the button boxes is closed, if the thermal relays KH1 and KH2 are normally not opened, the normally closed contacts of the thermal relays KH1 and KH2 are normally closed, and if the auxiliary transmission KM3 and KM4 are in an open state, the normally closed contacts of the auxiliary transmission KM3 and KM4 are closed, the coils of the KM1 and KM2 are electrified, the normally open contacts of the KM1 are closed, the main transmission is normally operated, the response signal loop at the DCS side is conducted, and the monitoring signal is obtained, otherwise, when the auxiliary transmission work, the normally closed contacts of the KM3 and KM4 are opened, and the coils of the KM1 and KM2 are unlikely to be electrified, so that the interlocking arrangement is realized. Normally open contacts of KM1 and KM2 are connected in series and then connected in parallel to two ends of S2 of the button box, so that self-holding of relay contact attraction is realized. Similarly, in the auxiliary transmission loop, because normally closed contacts of the KM1 and KM2 of the main transmission are connected in series, coils of the KM3 and KM4 cannot be electrified during the main transmission operation, that is, the M3 and M4 cannot work, so that the requirement that the main transmission and the auxiliary transmission cannot work simultaneously is ensured, and the safety of interlocking setting is realized.
The application aims to provide a cement novel production line, wherein a plurality of working procedures use a high-power elevator, and in consideration of equipment stability, some manufacturers are provided with double-motor driving, and the double-drive elevator is an elevator with two sets of main driving motors and two sets of auxiliary transmission systems.
As shown in fig. 1-4, the main transmission control schematic diagram of the double-drive elevator has two primary system diagrams which are respectively arranged in two drawer loops and are sequentially provided with circuit breakers (Q1, Q2), contactors (KM 1, KM 2), current transformers (TA 1-TA 3), thermal relays (KH 1, KH 2) for secondary side connection of the current transformers, electric energy meters, current transmitters and other components; A set of control loop system is adopted, namely a limit switch of a drawer loop, an emergency stop button ALB2 and a control button ALB1 are sequentially adopted, when the ALB1 is converted to a central control, if KH1 or KH2 has no fault action and two drawer loop breakers are switched on, then the relays K1 and K2 are electrically switched on, an auxiliary contact of the control loop system sends a signal to a DCS to display ready state, when the control loop system needs to be started, the DCS drives the relay K to switch on, an auxiliary contact of the control loop system sends a signal to the control loop, meanwhile, KM1 and KM2 are electrically switched on, if KH1 or KH2 is overloaded, the whole control loop is in power failure and is stopped, when the ALB1 is converted to a manual control, S2 in the ALB1 is simultaneously electrically switched on after the ALB1 is pressed on site, the auxiliary contacts of KM1 and KM2 are simultaneously attracted for self-holding, and when the control loop system needs to switch off, S1 in the ALB1 is pressed.
The auxiliary transmission control schematic diagram of the double-drive elevator is similar to the main transmission control schematic diagram, and is not described again here.
In order to ensure that accidents are prevented from being enlarged due to parallel operation in the operation and maintenance processes of the elevator, an electrical interlocking system (KH 1, KH2 and K1 are connected in series to the main control circuit) between two main transmission low-voltage drawer circuits and an electrical interlocking general condition between the main transmission low-voltage drawer circuit and an auxiliary transmission low-voltage drawer circuit is that the main transmission low-voltage circuit and the auxiliary transmission low-voltage drawer circuit cannot be powered on at the same time (the main transmission control of the double-drive elevator is that contacts of the two contactors KM1 and KM2 are connected in parallel and then are transmitted to the auxiliary transmission control of the double-drive elevator, and the auxiliary transmission control of the double-drive elevator is that contacts of the two contactors KM1 and KM2 are connected in parallel and then are transmitted to the main transmission). If the two low-voltage drawer loops of the main transmission and the auxiliary transmission are in a closed state, the interlocking system can prevent the risk of parallel operation because the two low-voltage drawer loops are interlocked with each other and cannot be closed, so that the safety and the reliability of the system are ensured, and the auxiliary transmission operation during normal operation and maintenance of the system is reliably operated.
It is obvious that the specific implementation of the present invention is not limited by the above-mentioned modes, and that it is within the scope of protection of the present invention only to adopt various insubstantial modifications made by the method conception and technical scheme of the present invention.

Claims (4)

1.一种双驱提升机的电气联锁控制系统，其特征在于：包括DCS、主传控制电路、辅传控制电路，所述DCS的输出端分别连接主传控制电路、辅传控制电路，用于驱动主传控制电路、辅传控制电路的工作，所述主传控制电路和所述辅传控制电路之间设置通过接触器的触点进行联锁以使得两者不能同时工作；1. An electrical interlocking control system for a dual-drive hoist, characterized in that it comprises a DCS, a main transmission control circuit, and an auxiliary transmission control circuit, wherein the output end of the DCS is respectively connected to the main transmission control circuit and the auxiliary transmission control circuit to drive the main transmission control circuit and the auxiliary transmission control circuit to work, and the main transmission control circuit and the auxiliary transmission control circuit are interlocked by contacts of a contactor so that the two cannot work at the same time; 所述主传控制电路包括主传电机M1、主传电机M2，三相电通过接触器KM1的常开触点后为主传电机M1供电，在主传电机M1的供电输入端设置电流互感器检测电机的输入电流，其输出端连接热继电器KH1；热继电器KH1的输出端连接功率变送器，功率变送器的输出端连接DCS，由三相电的L1向引出接线端子连接开关S1后经继电器K1的线圈后连接N线；三相电通过接触器KM2的常开触点后为主传电机M2供电，在主传电机M2的供电输入端设置电流互感器检测电机的输入电流，其输出端连接热继电器KH2；热继电器KH2的输出端连接功率变送器，功率变送器的输出端连接DCS，由三相电的L1向引出接线端子连接开关S2的一端，开关S2的另一端分别连接继电器K2的线圈以及开关盒ALB2，继电器K2的线圈与N线连接；开关盒ALB2与开关盒ALB1的输入端连接，开关盒ALB1包括按钮S1`、切换按钮S4、按钮S2`，开关盒ALB2的输出端连接按钮S1`后由按钮S1`连接切换按钮S4，切换按钮S4为双通道按钮，用于选通S4的两个输出端，第一输出端经继电器K的常开触点后连接N线，第二输出端经按钮S2`后连接接触器KM1的线圈一端，线圈KM1的另一端经过KH1的常闭触点、KH2的常闭触点、继电器K1的常开触点后连接N线；辅传电机的供电回路中继电器包括KM3、KM4，用于分别控制辅传电机M3、M4的供电，其常闭触点并联后连接在N线与继电器KM1线圈之间；继电器KM1线圈两端并联继电器KM2的线圈；DCS的驱动串口DO经继电器K的线圈后连接N线；DCS的备妥输出口依次经过继电器K1的常开触点、K2的常开触点后经断路器Q11连接DCS的COM1口；DCS的应答输出端经接触器KM1的常开触点、KM2的常开触点后连接至断路器Q11。The main transmission control circuit includes a main transmission motor M1 and a main transmission motor M2. The three-phase electricity passes through the normally open contact of the contactor KM1 to supply power to the main transmission motor M1. A current transformer is arranged at the power supply input end of the main transmission motor M1 to detect the input current of the motor, and its output end is connected to the thermal relay KH1; the output end of the thermal relay KH1 is connected to the power transmitter, and the output end of the power transmitter is connected to the DCS. The three-phase electricity L1 is connected to the lead-out terminal and connected to the switch S1 and then to the N line through the coil of the relay K1; the three-phase electricity passes through the normally open contact of the contactor KM2 to supply power to the main transmission motor M1. The main transmission motor M2 is powered by a current transformer, and a current transformer is set at the power supply input end of the main transmission motor M2 to detect the input current of the motor, and its output end is connected to the thermal relay KH2; the output end of the thermal relay KH2 is connected to the power transmitter, and the output end of the power transmitter is connected to the DCS. The three-phase power L1 leads to one end of the switch S2, and the other end of the switch S2 is respectively connected to the coil of the relay K2 and the switch box ALB2, and the coil of the relay K2 is connected to the N line; the switch box ALB2 is connected to the input end of the switch box ALB1, and the switch box ALB1 includes a button S 1`, switch button S4, button S2`, the output end of switch box ALB2 is connected to button S1` and then connected to switch button S4 by button S1`, switch button S4 is a dual-channel button, used to select the two output ends of S4, the first output end is connected to the N line after passing through the normally open contact of relay K, the second output end is connected to one end of the coil of contactor KM1 after passing through button S2`, and the other end of coil KM1 is connected to the N line after passing through the normally closed contact of KH1, the normally closed contact of KH2, and the normally open contact of relay K1; the relay in the power supply circuit of the auxiliary transmission motor includes KM3 , KM4, used to control the power supply of auxiliary transmission motors M3 and M4 respectively, and their normally closed contacts are connected in parallel between the N line and the coil of relay KM1; the coil of relay KM2 is connected in parallel at both ends of the coil of relay KM1; the drive serial port DO of DCS is connected to the N line after passing through the coil of relay K; the standby output port of DCS passes through the normally open contacts of relay K1 and K2 in turn and is connected to the COM1 port of DCS through the circuit breaker Q11; the response output end of DCS is connected to the circuit breaker Q11 after passing through the normally open contacts of contactors KM1 and KM2. 2.如权利要求1所述的一种双驱提升机的电气联锁控制系统，其特征在于：接触器KM1的常开触点、接触器KM2的常开触点相互串联后并联在按钮S2的两端。2. An electrical interlocking control system for a dual-drive hoist as described in claim 1, characterized in that the normally open contacts of contactor KM1 and contactor KM2 are connected in series and then in parallel at both ends of button S2. 3.如权利要求1或2所述的一种双驱提升机的电气联锁控制系统，其特征在于：所述的辅传控制电路包括辅传电机M3、电机M4，三相电与通过接触器KM3的常开触点与电机M3连接，三相电通过接触器KM4的常开触点与电机M4连接；三相电与KM3常开触点之间引出接线端子连接继电器K3的线圈一端，另一端接N线；三相电与KM4常开触点之间引出接线端子与按钮S31的一端连接，S31的另一端与接触器KM4的线圈连接，按钮S41并联在S31两端，接触器KM4的常开触点并联在S31两端，接触器KM3的线圈并联在KM4线圈的两端，接触器KM3的线圈依次经过相互串联的热继电器KH3的常闭触点、KH4的常闭触点、K3的常开触点后接入N线，热继电器KH3设置在M3的供电输入端，热继电器KH4设置在M4的供电输入端；接触器KM1的常闭触点、接触器KM2的常闭触点相互并联后串接在接触器KM3线圈和N线之间。3. An electrical interlocking control system for a dual-drive hoist as described in claim 1 or 2, characterized in that: the auxiliary transmission control circuit includes auxiliary transmission motor M3 and motor M4, the three-phase power is connected to motor M3 through the normally open contact of contactor KM3, and the three-phase power is connected to motor M4 through the normally open contact of contactor KM4; a wiring terminal is drawn between the three-phase power and the normally open contact of KM3 to connect one end of the coil of relay K3, and the other end is connected to N line; a wiring terminal is drawn between the three-phase power and the normally open contact of KM4 to connect one end of button S31, and the other end of S31 is connected to the line of contactor KM4 The button S41 is connected in parallel at both ends of S31, the normally open contacts of contactor KM4 are connected in parallel at both ends of S31, the coil of contactor KM3 is connected in parallel at both ends of the coil of KM4, the coil of contactor KM3 is connected in parallel through the normally closed contact of thermal relay KH3, the normally closed contact of KH4 and the normally open contact of K3 which are connected in series in turn and then connected to the N line, the thermal relay KH3 is set at the power supply input end of M3, and the thermal relay KH4 is set at the power supply input end of M4; the normally closed contacts of contactor KM1 and contactor KM2 are connected in parallel with each other and then connected in series between the coil of contactor KM3 and the N line. 4.如权利要求3所述的一种双驱提升机的电气联锁控制系统，其特征在于：DCS的应答接口依次经过相互串联的KM3的常开触点、KM4的常开触点以及断路器Q12后连接DCS的COM口。4. An electrical interlocking control system for a dual-drive hoist as described in claim 3, characterized in that the response interface of the DCS is connected to the COM port of the DCS after passing through the normally open contact of KM3, the normally open contact of KM4 and the circuit breaker Q12 which are connected in series.
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