Control circuit for belt conveyor soft starter to drive band-type brake

Abstract

The embodiment of the utility model provides a control circuit for driving a band-type brake by a soft starter of a belt conveyor, and belongs to the technical field of belt control. The control circuit comprises a control center module; the belt motor module is connected with the control center module and is used for starting or stopping a belt motor under the control of the control center module; and the belt brake motor module is connected with the control center module and is used for starting a belt brake motor while starting the belt motor and closing the belt brake motor while closing the belt motor. According to the control circuit, the belt motor and the belt band-type brake motor can be turned on and off simultaneously, and safe and reliable operation of equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a belt control technical field, specifically relates to a control circuit that soft starter drive of belt conveyor held brake. BACKGROUND

[0002] At present, the conveying equipment is more in factory enterprise, in order to protect the safe operation of conveying equipment, the protection configuration of belt conveyor is more and more, in order to protect the belt reversal of uphill belt under the gravity of material, the belt conveyor is configured with held brake device. With the increase of conveying belt capacity, the configuration of conveying motor is more and more big, and some large capacity motors are configured with soft starter. The output voltage of soft starter gradually increases when starting the motor, the motor gradually accelerates, until the thyristor is fully on, the motor works on the mechanical characteristic of rated voltage, and smooth starting is realized.

[0003] When starting the conveying motor on site, the held brake device must be opened first. The previous design adopts mode one: separately configuring held brake distribution and control circuit, opening the held brake through the central control before starting the belt conveying motor, and starting the belt conveying motor after the held brake is opened. In this way, the held brake and the conveying motor cannot be started and opened simultaneously, there is a lag problem in starting, and the belt with material is prone to reverse under the action of gravity. Mode two: the held brake motor wiring is connected to the conveying motor wiring circuit. In this way, the held brake motor is also electrified when the motor starts. Since the conveying motor starts under the soft start, the voltage gradually increases, the held brake cannot be opened instantaneously under the condition of low voltage, and the braking device is opened after the voltage increases. The held brake braking produces wear to the equipment bearing. UTILITY MODEL CONTENTS

[0004] The utility model embodiment aims at providing a control circuit that soft starter drive of belt conveyor held brake, and the control circuit can realize the simultaneous opening and closing of the belt motor and the belt held brake motor.

[0005] In order to realize the above-mentioned purpose, the utility model embodiment provides a control circuit that soft starter drive of belt conveyor held brake, which comprises:

[0006] A control center module;

[0007] A belt motor module, connected with the control center module, used for starting or closing the belt motor under the control of the control center module;

[0008] A belt held brake motor module, connected with the control center module, used for starting the belt held brake motor while starting the belt motor and closing the belt held brake motor while closing the belt motor.

[0009] Optionally, the control center module comprises:

[0010] A general controller;

[0011] a first button box, one end of the first button box being connected to one end of the master controller, the other end of the first button box being connected to the other end of the master controller;

[0012] a second button box, one end of the second button box being connected to the third end of the first button box;

[0013] a first relay, one end of the coil of the first relay being connected to one end of the master controller;

[0014] a second relay, one end of the contacts of the second relay being connected to the fourth end of the first button box, the other end of the contacts of the second relay being connected to the other end of the master controller, one end of the coil of the second relay being connected to the other end of the master controller, the other end of the coil of the second relay being connected to the other end of the first relay;

[0015] a speed relay, one end of the coil of the speed relay being connected to the other end of the master controller;

[0016] a choke relay, one end of the contacts of the choke relay being connected to the other end of the master controller;

[0017] a flow relay, one end of the contacts of the flow relay being connected to the other end of the master controller.

[0018] Optionally, the control center module further comprises:

[0019] a third relay, one end of the coil of the third relay being connected to the other end of the coil of the speed relay, the other end of the coil of the third relay being connected to the other end of the coil of the first relay;

[0020] a fourth relay, one end of the coil of the fourth relay being connected to the other end of the contacts of the choke relay, the other end of the coil of the fourth relay being connected to the other end of the third relay;

[0021] a fifth relay, one end of the coil of the fifth relay being connected to the other end of the contacts of the flow relay, the other end of the fifth relay being connected to the other end of the coil of the fourth relay;

[0022] a first small current relay, one end of the normally closed contacts of the first small current relay being connected to the other end of the second button box;

[0023] a second small current relay, one end of the contacts of the second small current relay being connected to the other end of the master controller;

[0024] a first contactor, one end of a coil of the first contactor being connected with the other end of the contact of the second small current relay, the other end of the coil of the first contactor being connected with the other end of the coil of the second relay.

[0025] Optionally, the control center module further comprises:

[0026] a running LED, one end of the running LED being connected with the other end of the coil of the first contactor, the other end of the running LED being connected with one end of the contact of the first contactor, the other end of the contact of the first contactor being connected with the other end of the second button box;

[0027] a power LED, one end of the power LED being connected with one end of the running LED, the other end of the power LED being connected with the other end of the normally closed contact of the first small current relay;

[0028] a sixth relay, one end of a coil of the sixth relay being connected with one end of the power LED;

[0029] a first run-out switch, one end of the first run-out switch being connected with the other end of the coil of the sixth relay, the other end of the first run-out switch being connected with the other end of the power LED;

[0030] a seventh relay, one end of a coil of the seventh relay being connected with one end of the power LED;

[0031] a second run-out switch, one end of the second run-out switch being connected with the other end of the coil of the seventh relay, the other end of the second run-out switch being connected with the other end of the power LED.

[0032] Optionally, the control center module further comprises:

[0033] a soft starter, an AO1 port and a COM port of the soft starter being connected with the analog quantity input port of the total controller, one end of the coil of the first small current relay being connected with an R1A port of the soft starter, the other end of the coil of the first small current relay being connected with one end of the coil of the sixth relay, one end of the coil of the second small current relay being connected with an R2A port of the soft starter, the other end of the coil of the second small current relay being connected with the other end of the coil of the first small current relay, the three contacts of the first contactor being connected with an 1L1 port and an A2 port, an 1L2 port and a B2 port, an 1L3 port and a C2 port of the soft starter respectively;

[0034] a third small current relay, one end of a coil of the third small current relay is connected with the R3C port of the soft starter, the other end of the coil of the third small current relay is connected with the other end of the coil of the second small current relay and the CL2 port of the soft starter;

[0035] a fault LED, one end of the fault LED is connected with the other end of the coil of the third small current relay, the other end of the fault LED is connected with one end of the contact of the first small current relay, the other end of the contact of the first small current relay is connected with the CL1 port of the soft starter and the other end of the first run-out switch;

[0036] a second contactor, one end of a coil of the second contactor is connected with one end of the fault LED, the other end of the coil of the second contactor is connected with one end of the contact of the second relay, the other end of the contact of the second relay is connected with the other end of the contact of the first small current relay;

[0037] a limit switch, one end of the limit switch is connected with the other end of the contact of the second relay;

[0038] a branch circuit breaker, one end of the branch circuit breaker is connected with one end of the limit switch, the other end of the branch circuit breaker is connected with the other end of the limit switch;

[0039] a miniature circuit breaker, one end of the miniature circuit breaker is connected with the other end of the branch circuit breaker and one end of the coil of the second contactor, the other end of the miniature circuit breaker is connected with a power supply.

[0040] Optionally, the belt motor module comprises:

[0041] a belt motor, connected with the soft starter;

[0042] a first fuse, one end of the first fuse is connected with the 1L1 port of the soft starter;

[0043] a second fuse, one end of the second fuse is connected with the 1L2 port of the soft starter;

[0044] a third fuse, one end of the third fuse is connected with the 1L3 port of the soft starter;

[0045] a first main circuit breaker, one end of the first main circuit breaker is connected with the other ends of the first, second and third fuses, the other end of the first main circuit breaker is connected with a power supply;

[0046] a mutual inductor, arranged on a connection line of the first, second and third fuses and the first main circuit breaker;

[0047] an electric meter, one end of the electric meter being connected with one end of the transformer;

[0048] an ammeter, one end of the ammeter being connected with the other end of the transformer, and the other end of the ammeter being connected with the other end of the electric meter;

[0049] a power branch fuse, one end of the power branch fuse being connected with the other end of the first fuse, and the other end of the power branch fuse being connected with the PJ port of the electric meter.

[0050] Optionally, the belt holding brake motor module comprises:

[0051] a belt holding brake motor;

[0052] a thermal relay, one end of the thermal relay being connected with the belt holding brake motor, and the other end of the thermal relay being connected with one end of a contact of the second contactor;

[0053] a second main circuit breaker, one end of the second main circuit breaker being connected with the other end of the contact of the second contactor, and the other end of the second main circuit breaker being connected with one end of the first main circuit breaker.

[0054] By the above technical solution, the control circuit of the belt conveyor soft starter driving holding brake provided by the utility model realizes the starting and stopping of the soft starter through the closing and opening of the second relay contact, so that the starting and stopping of the belt motor are realized, and the closing and opening of the second relay contact are utilized to connect and disconnect the second contactor coil, the closing and disconnecting of the main contact of the second contactor are realized, so that the starting and stopping of the belt holding brake motor are realized, and the same opening and closing of the belt motor and the belt holding brake motor are realized as a whole, and the safe and reliable operation of the equipment is ensured.

[0055] Other features and advantages of the embodiments of the utility model will be described in detail in the following specific implementation mode part. BRIEF DESCRIPTION OF DRAWINGS

[0056] The drawings are used to provide further understanding of the embodiments of the utility model, and constitute a part of the specification, and are used together with the following specific implementation mode to explain the embodiments of the utility model, but do not constitute the limitation of the embodiments of the utility model.In the drawings:

[0057] Figure 1 is the schematic diagram of the control circuit of the belt conveyor soft starter driving holding brake according to an embodiment of the utility model;

[0058] Figure 2is a schematic view of a control center module of a control circuit of a soft starter drive holding brake of a belt conveyor according to an embodiment of the utility model;

[0059] Figure 3 is a schematic view of a belt motor module of a control circuit of a soft starter drive holding brake of a belt conveyor according to an embodiment of the utility model;

[0060] Figure 4 is a schematic view of a belt holding brake motor module of a control circuit of a soft starter drive holding brake of a belt conveyor according to an embodiment of the utility model.

[0061] BRIEF DESCRIPTION OF DRAWINGS

[0062] DCS, general controller ALB1, first button box

[0063] ALB2, second button box Kss, speed relay

[0064] Kdl, material blocking relay Kll, material flow relay

[0065] K1, first relay K2, second relay

[0066] K3, third relay K4, fourth relay

[0067] K5, fifth relay K6, sixth relay

[0068] K7, seventh relay KA1, first small current relay

[0069] KA2, second small current relay KA3, third small current relay

[0070] KM1, first contactor KM2, second contactor

[0071] Lyx, running LED Ldy, power supply LED

[0072] Lgz, fault LED MS1, first deviation switch

[0073] MSll, second deviation switch S, limit switch

[0074] ATS48, soft starter Q(AX), branch circuit breaker

[0075] Q11, miniature circuit breaker Q1, first main circuit breaker

[0076] Q2, second main circuit breaker M1, belt motor

[0077] M2, belt holding brake motor RD1, first fuse

[0078] RD2, second fuse RD3, third fuse

[0079] TA, transformer kwh, kilowatt-hour meter

[0080] A, ammeter 2FU, power branch fuse

[0081] KH, thermal relay a, control center module

[0082] b, belt motor module c, belt brake motor module DETAILED DESCRIPTION

[0083] The specific embodiments of the utility model embodiments will be described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model embodiments, and are not used to limit the utility model embodiments.

[0084] It should be noted that the acquisition, transmission, storage, use, processing, etc. of data in the technical scheme of the present application comply with the relevant provisions of national laws and regulations. In the embodiments of the present application, some industry existing schemes such as software, components, models, etc. may be mentioned, which should be considered as exemplary, and the purpose is only to illustrate the feasibility of the implementation of the technical scheme of the present application, but it does not mean that the applicant has or will necessarily use the scheme.

[0085] As Figure 1 shown is a schematic diagram of a control circuit of a belt conveyor soft starter drive brake according to an embodiment of the utility model. In the Figure 1 control circuit, the control circuit can include a control center module a, a belt motor module b and a belt brake motor module c. Among them, the belt motor module b can be connected with the control center module a, used to start or close the belt motor M1 under the control of the control center module a. The belt brake motor module c can be connected with the control center module a, used to start the belt brake motor M2 at the same time of starting the belt motor M1, and close the belt brake motor M2 at the same time of closing the belt motor M1.

[0086] In this embodiment, for the specific form of the control center module a, there are many that can be known to those skilled in the art. In one preferred example of the present application, the control center module a can include a general controller DCS, a first button box ALB1, a second button box ALB2, a first relay K1, a second relay K2, a speed relay Kss, a blockage relay Kdl, a flow relay Kll, a third relay K3, a fourth relay K4, a fifth relay K5, a first small current relay KA1, a second small current relay KA2, a first contactor KM1, a running LED Lyx, a power LED Ldy, a sixth relay K6, a first deviation switch MS1, a seventh relay K7, a second deviation switch MSll, a soft starter ATS48, a third small current relay KA3, a fault LED Lgz, a second contactor KM2, a limit switch S, a branch circuit breaker Q(AX), and a miniature circuit breaker Q11, as shown in Figure 2The first button box ALB1 is connected to one end of the general controller DCS, and the other end of the first button box ALB1 is connected to the other end of the general controller DCS. One end of the second button box ALB2 is connected to the third end of the first button box ALB1, and one end of the coil of the first relay K1 is connected to one end of the general controller DCS. One end of the contact of the second relay K2 is connected to the fourth end of the first button box ALB1, and the other end of the contact of the second relay K2 is connected to the other end of the general controller DCS. One end of the coil of the second relay K2 is connected to the other end of the general controller DCS, and the other end of the coil of the second relay K2 is connected to the other end of the first relay K1. One end of the coil of the speed relay Kss is connected to the other end of the general controller DCS, one end of the contact of the blockage relay Kdl is connected to the other end of the general controller DCS, and one end of the contact of the flow relay Kll is connected to the other end of the general controller DCS. One end of the coil of the third relay K3 is connected to the other end of the coil of the speed relay Kss, and the other end of the coil of the third relay K3 is connected to the other end of the coil of the first relay K1. One end of the coil of the fourth relay K4 is connected to the other end of the contact of the blockage relay Kdl, and the other end of the coil of the fourth relay K4 is connected to the other end of the third relay K3. One end of the coil of the fifth relay K5 is connected to the other end of the contact of the flow relay Kll, and the other end of the coil of the fifth relay K5 is connected to the other end of the coil of the fourth relay K4. One end of the normally closed contact of the first small current relay KA1 is connected to the other end of the second button box ALB2, and one end of the contact of the second small current relay KA2 is connected to the other end of the general controller DCS. One end of the coil of the first contactor KM1 is connected to the other end of the contact of the second small current relay KA2, and the other end of the coil of the first contactor KM1 is connected to the other end of the coil of the second relay K2. One end of the running LED Lyx is connected to the other end of the coil of the first contactor KM1, and the other end of the running LED Lyx is connected to one end of the contact of the first contactor KM1. The other end of the contact of the first contactor KM1 is connected to the other end of the second button box ALB2. One end of the power LED Ldy is connected to one end of the running LED Lyx, and the other end of the power LED Ldy is connected to the other end of the normally closed contact of the first small current relay KA1. One end of the coil of the sixth relay K6 is connected to one end of the power LED Ldy, one end of the first runout switch MS1 is connected to the other end of the coil of the sixth relay K6, and the other end of the first runout switch MS1 is connected to the other end of the power LED Ldy. One end of the coil of the seventh relay K7 is connected to one end of the power LED Ldy, one end of the second runout switch MS11 is connected to the other end of the coil of the seventh relay K7, and the other end of the second runout switch MS11 is connected to the other end of the power LED Ldy.The AO1 port and the COM port of the soft starter ATS48 are connected with the analog input port of the general controller DCS, one end of the coil of the first small current relay KA1 is connected with the R1A port of the soft starter ATS48, the other end of the coil of the first small current relay KA1 is connected with one end of the coil of the sixth relay K6, one end of the coil of the second small current relay KA2 is connected with the R2A port of the soft starter ATS48, the other end of the coil of the second small current relay KA2 is connected with the other end of the coil of the first small current relay KA1, the 3 contacts of the first contactor KM1 are connected with the 1L1 port and the A2 port, the 1L2 port and the B2 port, the 1L3 port and the C2 port of the soft starter ATS48 respectively. One end of the coil of the third small current relay KA3 is connected with the R3C port of the soft starter ATS48, the other end of the coil of the third small current relay KA3 is connected with the other end of the coil of the second small current relay KA2 and the CL2 port of the soft starter ATS48. One end of the fault LED Lgz is connected with the other end of the coil of the third small current relay KA3, the other end of the fault LED Lgz is connected with one end of the contact of the first small current relay KA1, the other end of the contact of the first small current relay KA1 is connected with the CL1 port of the soft starter ATS48 and the other end of the first run-out switch MS1. One end of the coil of the second contactor KM2 is connected with one end of the fault LED Lgz, the other end of the coil of the second contactor KM2 is connected with one end of the contact of the second relay K2, the other end of the contact of the second relay K2 is connected with the other end of the contact of the first small current relay KA1. One end of the limit switch S is connected with the other end of the contact of the second relay K2. One end of the branch circuit breaker Q(AX) is connected with one end of the limit switch S, the other end of the branch circuit breaker Q(AX) is connected with the other end of the limit switch S. One end of the miniature circuit breaker Q11 is connected with the other end of the branch circuit breaker Q(AX) and one end of the coil of the second contactor KM2, the other end of the miniature circuit breaker Q11 is connected with the power supply.

[0087] In this embodiment, the specific form of the belt motor module b can be various as known to those skilled in the art. In a preferred example of the application, the belt motor module b can comprise a belt motor M1, a first fuse RD1, a second fuse RD2, a third fuse RD3, a first main circuit breaker Q1, a transformer TA, a kilowatt-hour meter kwh, an ammeter A and a power supply branch fuse 2FU, as shown in Figure 3As shown. Among them, the belt motor M1 can be connected with the soft starter ATS48. One end of the first fuse RD1 is connected with the 1L1 port of the soft starter ATS48, one end of the second fuse RD2 is connected with the 1L2 port of the soft starter ATS48, and one end of the third fuse RD3 is connected with the 1L3 port of the soft starter ATS48. One end of the first main circuit breaker Q1 is connected with the other end of the first fuse RD1, the second fuse RD2 and the third fuse RD3, and the other end of the first main circuit breaker Q1 is connected with the power supply. The transformer TA is arranged on the connection line of the first fuse RD1, the second fuse RD2 and the third fuse RD3 and the first main circuit breaker Q1. One end of the kilowatt-hour meter kwh is connected with one end of the transformer TA, one end of the ammeter A is connected with the other end of the transformer TA, and the other end of the ammeter A is connected with the other end of the kilowatt-hour meter kwh. One end of the power branch fuse 2FU is connected with the other end of the first fuse RD1, and the other end of the power branch fuse 2FU is connected with the PJ port of the kilowatt-hour meter kwh.

[0088] In this embodiment, for the specific form of the belt brake motor module c, various forms known to those skilled in the art can be used. In a preferred example of the utility model, the belt brake motor module c can include a belt brake motor M2, a thermal relay KH and a second main circuit breaker Q2, as shown in the figure. Figure 4 As shown. Among them, one end of the thermal relay KH is connected with the belt brake motor M2, and the other end of the thermal relay KH is connected with one end of the contact of the second contactor KM2. One end of the second main circuit breaker Q2 is connected with the other end of the contact of the second contactor KM2, and the other end of the second main circuit breaker Q2 is connected with one end of the first main circuit breaker Q1.

[0089] When the field button box turns to the central control position, the total controller DCS sends a start command when the operating conditions are met, the second relay K2 coil is energized, the second relay K2 normally open contact is closed to drive the soft starter ATS48 to drive the belt motor M1 to run, at the same time, after the second relay K2 normally open contact is closed, the second contactor KM2 coil is energized, the main contact of the second contactor KM2 is closed to drive the belt brake motor M2 to run; the total controller DCS sends a stop command, the second relay K2 coil is de-energized, the second relay K2 normally open contact is disconnected, the belt motor M1 stops running, at the same time, after the second relay K2 normally open contact is disconnected, the second contactor KM2 coil is de-energized, the main contact of the second contactor KM2 is disconnected, and the belt brake motor M2 stops running.

[0090] By the technical scheme, the control circuit of the soft starter drive clutch brake of the belt conveyor provided by the utility model realizes the start and stop of the soft starter through the closing and opening of the second relay contact, thereby realizing the start and stop of the belt motor, and the closing and opening of the second contactor coil is realized through the closing and opening of the second relay contact, the closing and opening of the second contactor main contact is realized, thereby realizing the start and stop of the belt clutch brake motor, and the belt motor and the belt clutch brake motor are realized as a whole, and the safe and reliable operation of the equipment is ensured.

[0091] Those skilled in the art will understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0092] The present application is described with reference to flowcharts and / or block diagrams according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0093] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0094] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide a process for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0095] In one typical arrangement, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0096] Memory can include non-persistent memory and / or volatile memory, such as random access memory (RAM) about which the processor can read instructions. Memory can also include non-volatile memory, such as read only memory (ROM), electrically programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), programmable read only memory (PROM), or flash memory, about which the processor can read instructions. Memory is an example of computer readable storage media.

[0097] Computer readable media includes permanent and non-permanent, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), electrically programmable read only memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital versatile discs (DVD) or other optical storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer readable media does not include transitory media, such as modulated data signals and carrier waves.

[0098] It should also be noted that the terms "comprising", "containing", or any other similar term are intended to encompass non-exclusive inclusions, such that a process, method, article or apparatus that comprises a list of elements does not necessarily include only those elements in the list, but can include other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element.

[0099] The above merely provides an example of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A control circuit for a drive band brake of a soft starter of a belt conveyor, characterized in that, The control circuit comprises: a control center module; a belt motor module connected with the control center module, used for starting or stopping the belt motor under the control of the control center module; a belt brake motor module connected with the control center module, used for starting the belt brake motor while starting the belt motor, and stopping the belt brake motor while stopping the belt motor.

2. The control circuit of claim 1, wherein, The control center module comprises: a general controller; a first button box, one end of which is connected with one end of the general controller, and the other end of which is connected with the other end of the general controller; a second button box, one end of which is connected with the third end of the first button box; a first relay, one end of the coil of which is connected with one end of the general controller; a second relay, one end of the contact of which is connected with the fourth end of the first button box, the other end of the contact of which is connected with the other end of the general controller, one end of the coil of which is connected with the other end of the general controller, and the other end of the coil of which is connected with the other end of the first relay; a speed relay, one end of the coil of which is connected with the other end of the general controller; a blockage relay, one end of the contact of which is connected with the other end of the general controller; a flow relay, one end of the contact of which is connected with the other end of the general controller.

3. The control circuit of claim 2, wherein, The control center module further comprises: a third relay, one end of the coil of which is connected with the other end of the coil of the speed relay, and the other end of the coil of which is connected with the other end of the coil of the first relay; a fourth relay, one end of the coil of which is connected with the other end of the contact of the blockage relay, and the other end of the coil of which is connected with the other end of the third relay; a fifth relay, one end of the coil of which is connected with the other end of the contact of the flow relay, and the other end of which is connected with the other end of the coil of the fourth relay; a first small current relay, one end of the normally closed contact of which is connected with the other end of the second button box; a second small current relay, one end of the contact of which is connected with the other end of the general controller; a first contactor, one end of the coil of which is connected with the other end of the contact of the second small current relay, and the other end of the coil of which is connected with the other end of the coil of the second relay.

4. The control circuit of claim 3, wherein, The control center module further comprises: a running LED, one end of which is connected with the other end of the coil of the first contactor, the other end of which is connected with one end of the contact of the first contactor, and the other end of the contact of which is connected with the other end of the second button box; a power LED, one end of the power LED is connected with one end of the running LED, and the other end of the power LED is connected with the other end of the normally closed contact of the first small current relay; a sixth relay, one end of the coil of the sixth relay is connected with one end of the power LED; a first run-off switch, one end of the first run-off switch is connected with the other end of the coil of the sixth relay, and the other end of the first run-off switch is connected with the other end of the power LED; a seventh relay, one end of the coil of the seventh relay is connected with one end of the power LED; a second run-off switch, one end of the second run-off switch is connected with the other end of the coil of the seventh relay, and the other end of the second run-off switch is connected with the other end of the power LED.

5. The control circuit of claim 4, wherein, The control center module further comprises: a soft starter, the A01 port and the COM port of the soft starter are connected with the analog quantity input port of the total controller, one end of the coil of the first small current relay is connected with the R1A port of the soft starter, the other end of the coil of the first small current relay is connected with one end of the coil of the sixth relay, one end of the coil of the second small current relay is connected with the R2A port of the soft starter, the other end of the coil of the second small current relay is connected with the other end of the coil of the first small current relay, and the 3 contacts of the first contactor are respectively connected with the 1L1 port and the A2 port, the 1L2 port and the B2 port, and the 1L3 port and the C2 port of the soft starter; a third small current relay, one end of the coil of the third small current relay is connected with the R3C port of the soft starter, and the other end of the coil of the third small current relay is connected with the other end of the coil of the second small current relay and the CL2 port of the soft starter; a fault LED, one end of the fault LED is connected with the other end of the coil of the third small current relay, the other end of the fault LED is connected with one end of the contact of the first small current relay, and the other end of the contact of the first small current relay is connected with the CL1 port of the soft starter and the other end of the first run-off switch; a second contactor, one end of the coil of the second contactor is connected with one end of the fault LED, the other end of the coil of the second contactor is connected with one end of the contact of the second relay, and the other end of the contact of the second relay is connected with the other end of the contact of the first small current relay; a limit switch, one end of the limit switch is connected with the other end of the contact of the second relay; a branch circuit breaker, one end of the branch circuit breaker is connected with one end of the limit switch, and the other end of the branch circuit breaker is connected with the other end of the limit switch; a miniature circuit breaker, one end of the miniature circuit breaker is connected with the other end of the branch circuit breaker and one end of the coil of the second contactor, and the other end of the miniature circuit breaker is connected with a power supply.

6. The control circuit of claim 5, wherein, The belt motor module comprises: a belt motor, connected with the soft starter; A first fuse, one end of the first fuse is connected with the 1L1 port of the soft starter; A second fuse, one end of the second fuse is connected with the 1L2 port of the soft starter; A third fuse, one end of the third fuse is connected with the 1L3 port of the soft starter; A first main circuit breaker, one end of the first main circuit breaker is connected with the other end of the first fuse, the second fuse and the third fuse, and the other end of the first main circuit breaker is connected with a power supply; A mutual inductor, the mutual inductor is arranged on the connection line of the first fuse, the second fuse and the third fuse and the first main circuit breaker; An electric meter, one end of the electric meter is connected with one end of the mutual inductor; An ammeter, one end of the ammeter is connected with the other end of the mutual inductor, and the other end of the ammeter is connected with the other end of the electric meter; A power supply branch fuse, one end of the power supply branch fuse is connected with the other end of the first fuse, and the other end of the power supply branch fuse is connected with the PJ port of the electric meter.

7. The control circuit of claim 6, wherein, The belt holding brake motor module comprises: A belt holding brake motor; A thermal relay, one end of the thermal relay is connected with the belt holding brake motor, and the other end of the thermal relay is connected with one end of the contact of the second contactor; A second main circuit breaker, one end of the second main circuit breaker is connected with the other end of the contact of the second contactor, and the other end of the second main circuit breaker is connected with one end of the first main circuit breaker.

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