CN113934134B - Loose and messy rope safety control circuit and system - Google Patents

Loose and messy rope safety control circuit and system Download PDF

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Publication number
CN113934134B
CN113934134B CN202111288434.2A CN202111288434A CN113934134B CN 113934134 B CN113934134 B CN 113934134B CN 202111288434 A CN202111288434 A CN 202111288434A CN 113934134 B CN113934134 B CN 113934134B
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relay
voltage signal
rope
input end
pin
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CN113934134A (en
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薛焕新
朱国良
唐利君
张震
潘巍
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Zhejiang Dafeng Industry Co Ltd
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Zhejiang Dafeng Industry Co Ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00Safety arrangements
    • G05B9/02Safety arrangements electric
    • G05B9/03Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The invention relates to the technical field of safety detection, and discloses a rope loosening and derailing safety control circuit and a system, which are used for detecting whether rope loosening or derailing occurs or not and carrying out safety control on an externally connected winch body, wherein the circuit comprises: the power supply signal input end is respectively connected with the control signal input end and the voltage signal input end of the first controller, the control signal output end of the first controller is connected with the voltage signal input end of the detection part, the voltage signal output end of the detection part is connected with the control signal input end of the second controller, the voltage signal output end of the first controller is connected with the voltage signal input end of the second controller, and the voltage signal output end of the second controller is connected with the detection signal output end. According to the invention, through the rope loosening and disorder safety control circuit, when abnormal conditions such as rope loosening or disorder, line disconnection, grounding or power failure of a voltage signal input end occur, equipment in operation can be timely detected and immediately stopped, and safety accidents are prevented.

Description

Loose and messy rope safety control circuit and system
Technical Field
The invention relates to the technical field of safety detection, in particular to a rope loosening and derailing safety control circuit and a system.
Background
In order to perfectly present artistic expression effects, stage machines become an indispensable artistic means adopted by more and more stage designers in modern artistic performances and artistic creation, and various sceneries in performances and special motion artistic performance forms are required to be realized by the stage machines, while most stage machines, particularly on-stage machines, are basically driven by windlass and wire ropes.
The steel wire rope driving has the following two dangers, and if the result of the non-timely stopping is serious, the accidents of the human body and the equipment can be directly endangered: when the scenery is lowered, the scenery cannot be lowered continuously by the rod or object beside the scenery, if the scenery is lowered continuously at the moment, the steel wire rope is loosened further, namely 'rope loosening'; in the scene rising process, the steel wire rope is orderly wound on the winding drum under normal conditions, and the steel wire rope can generate a rope overlapping phenomenon, commonly called as 'rope disorder', and serious rope disorder can generate mechanical damage to the steel wire rope, so that serious accident potential is caused.
The traditional rope loosening and disorder detection principle is simple, and even if rope loosening and disorder occurs, the phenomenon can not be found under partial conditions, so that personal or equipment accidents occur; therefore, a detection circuit for the abnormal condition of the steel wire rope is urgently needed to eliminate accident potential.
Disclosure of Invention
The invention aims to solve the problem that the existing loose rope is not detected comprehensively, and provides a loose rope safety control circuit and system.
In order to achieve the above object, the present invention provides a rope loosening and disorder safety control circuit for detecting whether rope loosening or disorder occurs and performing safety control on an external winch body, where the circuit includes a power signal input end, a safety detection circuit, and a detection signal output end, the winch body includes a grounded traction rope, a detection component is disposed around the traction rope, the safety detection circuit includes a first controller and a second controller, the power signal input end is connected to a control signal input end of the first controller and a voltage signal input end of the first controller, a control signal output end of the first controller is connected to a voltage signal input end of the detection component, a voltage signal output end of the detection component is connected to a control signal input end of the second controller, a control signal output end of the second controller is grounded, and a voltage signal output end of the first controller is connected to a voltage signal input end of the second controller, and a voltage signal output end of the second controller is connected to the detection signal output end.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is not broken or grounded, the detection signal output end can receive a voltage signal sent by the power signal input end, and the output logic state is high and is used as a basis for controlling the continuous operation of the winch body;
when rope loosening or rope disorder occurs, the detection part is contacted with the traction rope, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low level and is used as a basis for controlling the winch body to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is broken or grounded, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low and is used as the basis for controlling the winch body to stop running;
When the power signal input end cannot receive the voltage signal, the detection signal output end cannot receive the voltage signal, and the output logic state is low level, and the low level is used as a basis for controlling the stop operation of the winch body.
As an implementation manner, the first controller is a first relay U1, the second controller is a second relay U2, a first coil L1 is included between a control signal input end and a control signal output end of the first relay U1, when the first coil L1 is powered on, a voltage signal input end and a voltage signal output end of the first relay U1 are conducted, when the first coil L1 is not powered on, the voltage signal input end and the voltage signal output end of the first relay U1 are not conducted, a second coil L2 is included between the control signal input end and the control signal output end of the second relay U2, when the second coil L2 is powered on, a voltage signal input end and the voltage signal output end of the second relay U2 are not conducted, when the second coil L2 is not powered on, and the voltage signal input end and the voltage signal output end of the second relay U2 are not conducted.
As an implementation manner, the control signal input end of the first controller is a first pin of the first relay U1, the control signal output end of the first controller is an eighth pin of the first relay U1, the voltage signal input end of the first controller is a third pin of the first relay U1, the voltage signal output end of the first controller is a fourth pin of the first relay U1, a first coil L1 is included between the first pin of the first relay U1 and the eighth pin of the first relay U1, the third pin of the first relay U1 and the fourth pin of the first relay U1 form a first normally open point of the first relay U1, when the first relay U1 has a current, the first coil L1 gets a current, the first normally open point is electromagnetically attracted, and the third pin of the first relay U1 and the fourth pin of the first relay U1 are electrically connected; when no current flows through the first relay U1, the first coil L1 is not electrified, the first normally open point cannot be electromagnetically attracted, the first normally open point is disconnected, and the third pin of the first relay U1 and the fourth pin of the first relay U1 are not conducted;
The control signal input end of the second controller is a first pin of the second relay U2, the control signal output end of the second controller is an eighth pin of the second relay U2, the voltage signal input end of the second controller is a third pin of the second relay U2, the voltage signal output end of the second controller is a fourth pin of the second relay U2, a second coil L2 is arranged between the first pin of the second relay U2 and the eighth pin of the second relay U2, the third pin of the second relay U2 and the fourth pin of the second relay U2 form a second normally open point of the second relay U2, when the second relay U2 is electrified, the second coil L2 is electromagnetically attracted, and the third pin of the second relay U2 and the fourth pin of the second relay U2 are conducted; when no current flows through the second relay U2, the second coil L2 is not electrified, the second normally open point cannot be in electromagnetic attraction, the second normally open point is disconnected, and the third pin of the second relay U2 and the fourth pin of the second relay U2 are not conducted.
As an implementation manner, a first reverse diode D1 connected in parallel with the first relay U1 is further included between the power signal input end and the series circuit of the detection component, the positive electrode of the first reverse diode D1 is connected with the eighth pin of the first relay U1, the negative electrode of the first reverse diode D1 is connected with the first pin of the first relay U1, a second reverse diode D3 connected in parallel with the second relay U2 is further included between the series circuit of the detection component and the second relay U2, the positive electrode of the second reverse diode D3 is connected with the eighth pin of the second relay U2, and the negative electrode of the second reverse diode D3 is connected with the first pin of the second relay U2.
As an implementation manner, when no rope loosening or rope disorder occurs, the detecting component and the traction rope are not in contact, the power signal input end, the safety detecting circuit, the detecting signal output end and the serial circuit of the detecting component are not broken or grounded, the power signal input end inputs a voltage signal, the first coil L1 and the second coil L2 have current passing through, the first normally open point and the second normally open point can be attracted, and the voltage signal sequentially passes through the third pin of the first relay U1, the fourth pin of the first relay U1, the third pin of the second relay U2 and the fourth pin of the second relay to be transmitted to the detecting signal output end, and the detecting signal output end receives the voltage signal transmitted by the power signal input end, outputs a logic state of "high level" and uses the logic state as a basis for controlling the winch body to continue to operate.
As an implementation mode, when rope loosening or rope disorder occurs, the detection component is in contact with the traction rope, a voltage signal is input to the power signal input end, the first coil L1 is provided with current to pass through, the first normally open point can be attracted, the voltage signal sequentially passes through the first pin of the first relay, the eighth pin of the first relay, the detection component and the winch body to reach the ground, no current passes through the second coil L2, the second normally open point cannot be attracted, the voltage signal cannot be transmitted to the detection signal output end through the second relay U2, the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the output logic state is low and is used as a basis for controlling the winch body to stop running.
As an implementation manner, when no rope loosening or rope disorder occurs, the detecting component and the traction rope are not in contact, but any position of the serial circuit of the power signal input end, the safety detecting circuit, the detecting signal output end and the detecting component is broken, the power signal input end inputs a voltage signal, no current passes through the first coil L1 and the second coil L2, the first normally open point and the second normally open point cannot be attracted, the voltage signal cannot be sent to the detecting signal output end through the first relay U1 and the second relay U2, the detecting signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is a low level, thereby being used as a basis for controlling the stop operation of the winch body.
As an implementation manner, when no rope loosening or rope disorder occurs, the detection component and the traction rope are not in contact, any position of the serial circuit of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is grounded, a voltage signal is input into the power signal input end, no current passes through the first coil L1 and/or the second coil L2, the first normally open point and/or the second normally open point cannot be attracted, the voltage signal cannot be sent to the detection signal output end through the first relay U1 and/or the second relay U2, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the input logic state is "low level" and is used as a basis for controlling the winch body to stop running.
Correspondingly, the invention also provides a rope loosening and derailing safety control system which comprises a winch body, a power supply module, a control module and a rope loosening and derailing safety control circuit; the rope loosening and disorder safety control circuit is used for detecting whether rope loosening or disorder occurs and carrying out safety control on the winch body and comprises a power signal input end, a safety detection circuit and a detection signal output end, wherein the power signal input end is connected with the output end of the power module, the input end of the control module is connected with the detection signal output end, the winch body comprises a traction rope which is grounded, a detection part is arranged around the traction rope, the safety detection circuit comprises a first controller and a second controller, the power signal input end is respectively connected with the control signal input end of the first controller and the voltage signal input end of the first controller, the control signal output end of the first controller is connected with the voltage signal input end of the detection part, the voltage signal output end of the detection part is connected with the control signal input end of the second controller, the control signal output end of the second controller is grounded, the voltage signal output end of the first controller is connected with the voltage signal input end of the second controller, and the voltage signal output end of the second controller is connected with the voltage signal input end of the second controller;
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power module, the rope loosening and disordered safety control circuit, the control module and the detection component is not broken or grounded, the control module can receive a voltage signal sent by the power module, inputs a logic state of high level and controls the winch body to continue to operate;
when rope loosening or rope disorder occurs, the detection component is contacted with the traction rope, the control module cannot receive the voltage signal sent by the power supply module, the input logic state is low level, and the winch body is controlled to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power module, the rope loosening and disordered safety control circuit, the control module and the detection component is broken or grounded, the control module cannot receive a voltage signal sent by the power module, inputs a logic state of low level and controls the winch body to stop running;
when the power supply module is abnormal and cannot send out a voltage signal, the control module cannot receive the voltage signal, inputs a logic state of low level and controls the winch body to stop running.
As an implementation manner, the winch body further comprises a winding drum, the detection component is a metal plate, the metal plate is fixed below the winding drum, when rope disorder does not occur, the traction rope wound on the winding drum is not contacted with the metal plate, the winch body is not conducted, the metal plate is not grounded, when rope disorder occurs, the traction rope wound on the winding drum is contacted with the metal plate, the winch body is conducted, and the metal plate is grounded; or the metal plate is fixed below any traction rope, when the rope is not loosened, the traction rope wound on the winding drum is not contacted with the metal plate, the winding machine body is not conducted, the metal plate is not grounded, when the rope is loosened, the metal plate is contacted with the traction rope, the winding machine body is conducted, and the metal plate is grounded.
The invention has the beneficial effects that: the invention discloses a rope loosening and disorder safety control circuit and a system, which can timely detect abnormal conditions such as rope loosening, line disconnection, grounding or power failure of a voltage signal input end when used for detecting whether rope loosening occurs in a traction rope, and timely detect abnormal conditions such as rope disorder, line disconnection, grounding or power failure of the voltage signal input end when used for detecting whether rope loosening occurs in the traction rope; and the running equipment can be immediately controlled to stop running after timely detection, so that safety accidents are prevented.
Drawings
Fig. 1 is a schematic diagram of a conventional rope-break detection circuit.
Fig. 2 is a schematic diagram of a conventional rope-loosening detection circuit.
FIG. 3 is a schematic cross-sectional view of the winch body, the detecting member and the motor of the rope loosening and derailing safety control circuit of the present invention.
Fig. 4 is a schematic front view of the first detecting unit and its connecting unit of the rope loosening and breaking safety control circuit according to the present invention.
FIG. 5 is a schematic left-hand cross-sectional view of the hoist body, the detection member and the motor of the rope loosening and derailing safety control circuit of the present invention.
Fig. 6 is a schematic left-hand cross-sectional view of the first detecting member and its connecting member of the rope loosening and safety control circuit of the present invention.
Fig. 7 is a schematic front view of the hoist body, the wire rope, the motor and the boom of the rope loosening and derailing safety control circuit of the present invention.
Fig. 8 is an enlarged schematic view of a detail portion in fig. 7.
FIG. 9 is a schematic diagram of a rope slackening detection system of the present invention.
FIG. 10 is a schematic diagram of a rope slackening safety control system of the present invention for detecting rope slackening.
FIG. 11 is a schematic diagram of a specific circuit for detecting rope disorder by the rope loosening and disorder safety control circuit of the invention.
Fig. 12 is a schematic diagram of a specific circuit for detecting a loose rope by the loose rope safety control circuit of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the schematic diagram of the conventional rope disorder detection principle includes a power module, a control module and a winch body, the winch body 100 includes a grounded traction rope, a detection component is disposed around the traction rope, the traction rope is a steel wire rope, the detection component is a first metal plate 110 as shown in the figure, the power module is respectively connected with the first metal plate 110 and the control module, and the traction rope of the winch body 100 is grounded, specifically: the electric hoist further comprises a motor 10 and a first resistor R1, wherein the motor 10 is connected with the hoist body 100 and is used for providing driving for the hoist 100, one end of the first resistor R1 is connected with the power supply module, and the other end of the first resistor R1 is respectively connected with the control module and the first metal plate 110.
The power module is a 24V direct current power supply, the control module is a PLC controller, and the first metal plate 110 is an aluminum plate.
Referring to fig. 3 and 4, the hoist body includes a drum including a plurality of portions in a length direction, each portion being wound with a wire rope, a cylinder 140, and the first metal plate 110, and each wire rope is wound on a corresponding portion of the drum in a single layer, for example: the winding drum is divided into 6 parts according to the length direction, the length of each part is 180cm, each part is wound with a steel wire rope, each steel wire rope is wound on each part of the winding drum in a single layer, the diameter of the winding drum is 340cm, and the length of the metal plate is 6 x 180cm; the specific parameters are determined according to actual conditions of different scenes.
The first metal plate 110 is fixed on the cylinder 140 through the first fastener 120, the first metal plate 110 includes a first bending section 111, a second bending section 112 and a third vertical section 113, a spacer 130 is further included between the third vertical section 113 of the first metal plate 110 and the cylinder 140, a distance from the first bending section 111 to the wire rope wound on the winding machine is smaller than a diameter of the wire rope, specifically, if the diameter of the wire rope is d, a distance from the first bending section 111 to the wire rope wound on the winding machine is greater than or equal to 0.5d and smaller than d, so that the wire rope above the first metal plate 110 does not touch the first metal plate 110 in normal operation, and when rope disorder occurs, the wire rope above the first metal plate 110 may touch the first metal plate 110.
Referring to fig. 2, which is a schematic diagram of a conventional rope loosening detection principle, the rope loosening detection principle comprises a power module, a control module and a winch body 100, wherein the winch body 100 comprises a grounded haulage rope, a detection component is arranged around the haulage rope, the haulage rope is a steel wire rope, the detection component is a second metal plate 161 as shown in the figure, the power module is respectively connected with the second metal plate 161 and the control module, and the winch body 100 is grounded, specifically: the electric hoist further comprises a motor 10 and a first resistor R1, wherein the motor 10 is connected with the hoist body 100 and is used for providing driving for the hoist 100, one end of the first resistor R1 is connected with the power supply module, and the other end of the first resistor R1 is respectively connected with the control module and the second metal plate 161.
The power module is a 24V direct current power supply, the control module is a PLC controller, and the second metal plate 161 is an aluminum plate.
Referring to fig. 7 and 8, fig. 8 is an enlarged view of a detail 160 in fig. 7, 6 wire ropes 150 are wound around the hoist body 100, but in practice, the number of wire ropes is determined according to circumstances, the wire ropes are used to pull up or down the boom 20, and a second metal plate 161 is fixed under the wire ropes 150 at the two detail 160, so that the wire ropes 150 above the second metal plate 161 do not touch the second metal plate 161 in normal operation, and the wire ropes 150 above the second metal plate 161 are in contact with the second metal plate 161 when a rope loosening situation occurs.
The specific conventional detection principle is as follows:
under normal conditions, when rope loosening or rope disorder does not occur, the detection component is not contacted with the steel wire rope above the detection component, the power supply module inputs a 24V voltage signal, the voltage signal reaches the PLC through the first resistor R1, the PLC receives the voltage signal, inputs a logic state of high level, judges that the operation is normal, and controls the winch body to continue to operate;
when rope loosening or rope loosening occurs, the detection component is in contact with the steel wire rope above the detection component, the detection component is grounded through the winch, which is equivalent to the grounding of a point B in fig. 1 or 2, the power supply module inputs a voltage signal of 24V, the voltage signal reaches the ground through the first resistor R1, the PLC controller cannot receive the voltage signal, inputs a logic state of low level, judges that a rope loosening and rope loosening alarm is generated, and immediately stops the operation of the winch body 100.
According to the above technical solution, it can be seen that the conventional detection circuit has a simple circuit, and even if a rope loosening fault occurs under some conditions, the logic state will not change, i.e. a "high level" state is always displayed, for example: in fig. 1 and 2, the line from point a to point B is broken (e.g., a mouse bites) due to loose contact failure at point a or point B.
Therefore, in order to solve the above-mentioned problem, the present invention provides a rope loosening and disorder safety control circuit for detecting whether rope loosening or rope disorder occurs and performing safety control on an external winch body, the circuit includes a power signal input end, a safety detection circuit, and a detection signal output end, the winch body includes a grounded haulage rope, a detection component is disposed around the haulage rope, the safety detection circuit includes a first controller and a second controller, the power signal input end is respectively connected with a control signal input end of the first controller and a voltage signal input end of the first controller, a control signal output end of the first controller is connected with a voltage signal input end of the detection component, a voltage signal output end of the detection component is connected with a control signal input end of the second controller, a control signal output end of the second controller is grounded, a voltage signal output end of the first controller is connected with a voltage signal input end of the second controller, and a voltage signal output end of the second controller is connected with the detection signal output end;
when the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is not broken or grounded, the detection signal output end can receive a voltage signal sent by the power signal input end, and the output logic state is high and is used as a basis for controlling the continuous operation of the winch body;
When rope loosening or rope disorder occurs, the detection part is contacted with the traction rope, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low level and is used as a basis for controlling the winch body to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is broken or grounded, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low and is used as the basis for controlling the winch body to stop running;
when the power signal input end cannot receive the voltage signal, the detection signal output end cannot receive the voltage signal, and the output logic state is low level, and the low level is used as a basis for controlling the stop operation of the winch body.
The detection part is a metal plate, referring to fig. 9 and 10, the metal plate comprises a first metal plate 110 and a second metal plate 161, the power signal input end is connected with a 24V direct current power supply, and the detection signal output end is connected with a PLC controller. Note that, in the present embodiment, the mounting manner, the structural configuration, and the like of the first metal plate and the second metal plate, and the structural configuration and the like of the hoist body are all prior art, and thus will not be described in detail.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope above the detection component, any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is not broken or grounded, the detection signal output end can receive a voltage signal sent by the voltage signal input end, and the output logic state is high and is used as a basis for controlling the continuous operation of the winch body, and the detection component specifically comprises:
referring to fig. 9, when no rope disorder occurs, the first metal plate 110 is not in contact with the traction rope above the first metal plate 110, and any one of the power signal input end, the safety detection circuit, the detection signal output end and the first metal plate 110 is not broken or grounded, the detection signal output end can receive a voltage signal sent by the power signal input end, and output a logic state of "high level" as a basis for controlling the hoist body to continue to operate;
referring to fig. 10, when the rope is not loosened, the second metal plate 161 is not contacted with the traction rope above the second metal plate 161, and any one of the power signal input end, the safety detection circuit, the detection signal output end and the second metal plate 161 is not broken or grounded, and the detection signal output end can receive the voltage signal sent by the power signal input end, output a logic state of "high level" and use the logic state as a basis for controlling the hoist body to continue to operate.
When rope loosening or rope disorder occurs, the detection part is contacted with the traction rope, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low level and is used as a basis for controlling the winch body to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is broken or grounded, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low and is used as the basis for controlling the hoist body to stop running, and the method specifically comprises the following steps:
referring to fig. 9, when no rope disorder occurs, but any one of the power signal input end, the safety detection circuit, the controller and the series circuit of the first metal plate 110 is broken or grounded, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and outputs a logic state of "low level" as a basis for controlling the hoist body to stop running;
Referring to fig. 10, when the rope is not loosened, but any one of the series circuit of the power signal input terminal, the safety detection circuit, the controller and the second metal plate 161 is broken or grounded, the detection signal output terminal cannot receive the voltage signal transmitted from the power signal input terminal, and outputs a logic state of "low level" as a basis for controlling the hoist body to stop operating.
When the power signal input end cannot receive the voltage signal, the detection signal output end cannot receive the voltage signal, and the output logic state is low level, and the low level is used as a basis for controlling the stop operation of the winch body.
Referring to fig. 9 and 10, the first controller is a first relay U1, the second controller is a second relay U2, a first coil L1 is included between a control signal input end and a control signal output end of the first relay U1, when the first coil L1 is powered on, a voltage signal input end and a voltage signal output end of the first relay U1 are conducted, when the first coil L1 is not powered on, the voltage signal input end and the voltage signal output end of the first relay U1 are not conducted, a second coil L2 is included between the control signal input end and the control signal output end of the second relay U2, when the second coil L2 is powered on, the voltage signal input end and the voltage signal output end of the second relay U2 are not conducted, and when the second coil L2 is powered on, the voltage signal input end and the voltage signal output end of the second relay U2 are not conducted.
The control signal input end of the first controller is a first pin 1 of the first relay U1, the control signal output end of the first controller is an eighth pin 8 of the first relay U1, the voltage signal input end of the first controller is a third pin 3 of the first relay U1, the voltage signal output end of the first controller is a fourth pin 4 of the first relay U1, a first coil L1 is contained between the first pin 1 of the first relay U1 and the eighth pin 8 of the first relay U1, the third pin 3 of the first relay U1 and the fourth pin 4 of the first relay U1 form a first normally open point of the first relay U1, when the first relay U1 has electric current to flow through, the first coil L1 is electrified, the first normally open point is electromagnetically attracted, and the third pin 3 of the first relay U1 and the fourth pin 4 of the first relay U1 are conducted; when no current flows through the first relay U1, the first coil L1 is not electrified, the first normally open point cannot be electromagnetically attracted, the first normally open point is disconnected, and the third pin 3 of the first relay U1 and the fourth pin 4 of the first relay U1 are not conducted;
The control signal input end of the second controller is a first pin 1 of the second relay U2, the control signal output end of the second controller is an eighth pin 8 of the second relay U2, the voltage signal input end of the second controller is a third pin of the second relay U2, the voltage signal output end of the second controller is a fourth pin 4 of the second relay U2, a second coil L2 is arranged between the first pin 1 of the second relay U2 and the eighth pin 8 of the second relay U2, the third pin 3 of the second relay U2 and the fourth pin of the second relay U2 form a second normally open point of the second relay U2, when the second relay U2 has a current, the second coil L2 is electrified, the second normally open point is electromagnetically attracted, and the third pin 3 of the second relay U2 and the fourth pin 4 of the second relay U2 are conducted; when no current flows through the second relay U2, the second coil L2 is not electrified, the second normally open point cannot be electromagnetically attracted, the second normally open point is disconnected, and the third pin 3 of the second relay U2 and the fourth pin 4 of the second relay U2 are not conducted.
Referring to fig. 11 and 12, a first reverse diode D1 connected in parallel with the first relay U1 is further included between the power signal input end and the series circuit of the detection component, the positive electrode of the first reverse diode D1 is connected with the eighth pin of the first relay U1, the negative electrode of the first reverse diode D1 is connected with the first pin of the first relay U1, a second reverse diode D3 connected in parallel with the second relay U2 is further included between the series circuit of the detection component and the second relay U2, the positive electrode of the second reverse diode D3 is connected with the eighth pin of the second relay U2, and the negative electrode of the second reverse diode D3 is connected with the first pin of the second relay U2.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, the power signal input end, the safety detection circuit, the detection signal output end and the series circuit of the detection component are not broken or grounded, the power signal input end inputs a voltage signal, the first coil L1 and the second coil L2 are all provided with current, the first normally open point and the second normally open point can be attracted, and the voltage signal sequentially passes through the third pin of the first relay U1, the fourth pin of the first relay U1, the third pin of the second relay U2 and the fourth pin of the second relay to be transmitted to the detection signal output end, the detection signal output end receives the voltage signal transmitted by the power signal input end, and the output logic state is high level and is used as the basis for controlling the continuous operation of the winch body.
Specifically, referring to fig. 9, when no rope disorder occurs, and the series circuit of the power signal input end, the safety detection circuit, the controller and the first metal plate 110 is not broken or grounded, the power signal input end inputs a voltage signal, both the first relay U1 and the second relay U2 have current passing through and can be attracted, the voltage signal sequentially passes through the third pin of the first relay U1, the fourth pin of the first relay U1, the third pin of the second relay U2 and the fourth pin of the second relay to be sent to the detection signal output end, and the detection signal output end receives the voltage signal sent by the power signal input end, outputs a logic state of "high level", and controls the winch body to continue to operate;
referring to fig. 10, when the rope is not loosened, and the series circuit of the power signal input end, the safety detection circuit, the controller and the second metal plate 161 is not broken or grounded, the power signal input end inputs a voltage signal, the first relay U1 and the second relay U2 have current passing through and can both be attracted, the voltage signal sequentially passes through the third pin of the first relay U1, the fourth pin of the first relay U1, the third pin of the second relay U2 and the fourth pin of the second relay to be transmitted to the detection signal output end, the detection signal output end receives the voltage signal transmitted by the power signal input end, and the output logic state is "high level", so as to control the winch body to continue to operate.
When rope loosening or rope disorder occurs, the detection part is contacted with the traction rope, a voltage signal is input by the power signal input end, the first coil L1 is provided with current to pass through, the first normally open point can be attracted, the voltage signal sequentially passes through the first pin of the first relay, the eighth pin of the first relay, the detection part and the winch body to reach the ground, no current passes through the second coil L2, the second normally open point cannot be attracted, the voltage signal cannot be transmitted to the detection signal output end through the second relay U2, the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the output logic state is low and is used as the basis for controlling the winch body to stop running.
Specifically, referring to fig. 9, when rope disorder occurs, the wire rope on the winch body contacts with the first metal plate 110, a voltage signal is input at the power signal input end, the first relay U1 has current passing through and can be attracted, the voltage signal sequentially passes through the first resistor R1, the first pin of the first relay, the eighth pin of the first relay, the first metal plate 110 and the winch body reach the ground, no current passes through and cannot be attracted on the second relay U2, the voltage signal cannot be sent to the detection signal output end through the second relay U2, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is "low level" and is used as the basis for controlling the operation of the winch body to stop;
Referring to fig. 10, when rope loosening occurs, the wire rope on the winch body contacts with the second metal plate 161, a voltage signal is input to the power signal input end, the first relay U1 has current passing through and can be attracted, the voltage signal sequentially passes through the first resistor R1, the first pin of the first relay, the eighth pin of the first relay, the second metal plate 161 and the winch body reach the ground, no current passes through and cannot be attracted on the second relay U2, the voltage signal cannot be transmitted to the detection signal output end through the second relay U2, the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the output logic state is "low level" and is used as a basis for controlling the winch body to stop running;
when the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any position of the serial circuit of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is broken, the voltage signal input end inputs a voltage signal, no current passes through the first coil L1 and the second coil L2, the first normally open point and the second normally open point cannot be attracted, the voltage signal cannot be sent to the detection signal output end through the first relay U1 and the second relay U2, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low and is used as the basis for controlling the winch body to stop running.
Specifically, referring to fig. 9, when no rope disorder occurs, a circuit break occurs at any position of the serial circuit of the power signal input end, the safety detection circuit, the controller and the first metal plate 110, a voltage signal is input to the power signal input end, no current passes through the first relay U1 and the second relay U2 and cannot be absorbed, the voltage signal cannot be sent to the detection signal output end through the first normally open point of the first relay U1 and the second normally open point of the second relay U2, and the detection signal output end cannot receive the voltage signal sent by the power signal input end, so that the output logic state is "low level" and is used as a basis for controlling the stop operation of the winch body;
referring to fig. 10, when the rope is not loosened, the power signal input end, the safety detection circuit, the controller and any one of the series circuits of the second metal plate 161 is broken, the power signal input end inputs a voltage signal, no current passes through the first relay U1 and the second relay U2 and cannot be sucked, the voltage signal cannot be sent to the detection signal output end through the first normally open point of the first relay U1 and the second normally open point of the second relay U2, and the detection signal output end cannot receive the voltage signal sent by the power signal input end, and outputs a logic state of "low level" as a basis for controlling the hoist body to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any position of the series circuit of the voltage signal input end, the safety detection circuit, the detection signal output end and the detection component is grounded, the voltage signal input end inputs a voltage signal, no current passes through the first coil L1 and/or the second coil L2, the first normally open point and/or the second normally open point cannot be attracted, the voltage signal cannot be sent to the detection signal output end through the first relay U1 and/or the second relay U2, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low level and is used as the basis for controlling the stop operation of the winch body.
Specifically, referring to fig. 9, when no rope disorder occurs, any one of the power signal input end, the safety detection circuit, the controller and the serial circuit of the first metal plate 110 is grounded, a voltage signal is input to the power signal input end, no current passes through the first relay U1 and/or the second relay U2 and cannot be absorbed, that is, the first coil L1 and the second coil L2 cannot be electrified, the first normally open point and the second normally open point cannot be absorbed, the voltage signal cannot be transmitted to the detection signal output end through the first normally open point of the first relay U1 and/or the second normally open point of the second relay U2, the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the output logic state is "low level" and is used as a basis for controlling the hoist body to stop running;
Referring to fig. 10, when the rope is not loosened, any one of the series circuit of the power signal input terminal, the safety detection circuit, the controller and the second metal plate 161 is grounded, a voltage signal is input to the power signal input terminal, no current passes through the first relay U1 and/or the second relay U2 and cannot be absorbed, the voltage signal cannot be sent to the detection signal output terminal through the first relay U1 and/or the second relay U2, the detection signal output terminal cannot receive the voltage signal sent by the power signal input terminal, and the output logic state is "low level" and is used as a basis for controlling the hoist body to stop running.
HFD4/12 is adopted by the first relay U1 and the second relay U2, and rated voltages of the first relay and the second relay are 12V.
Referring to fig. 11 and 12, a first resistor R1 is further included between the power signal input terminal and the first pin of the first relay, a first reverse diode D1 connected in parallel with the first relay U1 is further included between the first resistor and the series circuit of the metal plate, the positive electrode of the first reverse diode D1 is connected with the eighth pin of the first relay U1, the negative electrode of the first reverse diode D1 is connected with the first pin of the first relay U1, a third reverse diode D3 connected in parallel with the second relay U2 is further included between the metal plate and the series circuit of the second relay U2, the positive electrode of the third reverse diode D3 is connected with the eighth pin of the second relay U2, the negative electrode of the third reverse diode D3 is connected with the first pin of the second relay U2, the sixth pin of the second relay U2 is connected with the power signal input terminal, the negative electrode of the second relay U2 is connected with the second resistor R2 through the second diode D2.
The first reverse diode D1 and the third reverse diode D3 adopt 1N4007, the second light emitting diode D2 adopts LG a676, the resistance value of the first resistor R1 is 33, and the resistance value of the second resistor R2 is 15 ohms.
The invention not only has the function of rope loosening and disorder protection, but also eliminates safety accidents caused by hidden danger of circuits and the like, and has good safety protection effect.
The first relay U1 and the second relay U2 both comprise coils and auxiliary contacts, and the auxiliary contacts comprise 2 normally open points and 2 normally closed points;
as shown in fig. 11 and 12, the first relay U1 includes a first coil L1 and 4 auxiliary contacts, where a third pin 3 of the first relay U1 and a sixth pin 6 of the first relay U1 are both a common terminal COM1, a second pin 2 of the first relay U1 and the third pin 3 of the first relay U1 form a normally closed point NC1, a fourth pin 4 of the first relay U1 and the third pin 3 of the first relay U1 form a normally open point NO1, a seventh pin 7 of the first relay U1 and the sixth pin 6 form a normally closed point NC1, and a fifth pin 5 of the first relay U1 and the sixth pin 6 form a normally open point NO1;
The second relay U2 comprises a second coil L2 and 4 auxiliary contacts, the auxiliary contacts comprise a normally open point and a normally closed point, wherein a third pin 3 of the second relay U2 and a sixth pin 6 of the second relay U2 are both a common end COM2, the second pin 2 of the second relay U2 and the third pin 3 of the second relay U2 form a normally closed point NC2, a fourth pin 4 of the second relay U2 and the third pin 3 of the second relay U2 form a normally open point NO2, a seventh pin 7 and a sixth pin 6 of the second relay U2 form a normally closed point NC2, and a fifth pin 5 and a sixth pin 6 of the second relay U2 form a normally open point NO2;
however, in the present embodiment, referring to fig. 11 and 12, only the first normally open point, which is the normally open point composed of the third pin 3 of the first relay U1 and the fourth pin 4 of the first relay U1, and the second normally open point, which is the normally open point composed of the third pin 3 of the second relay U2 and the fourth pin 4 of the second relay U2, are used.
When the first relay U1 has current passing through, the coil of the first relay U1 is electrified, and the normally open point of the first relay U1 is electromagnetically attracted; when the first relay U1 does not have current passing through, the coil of the first relay U1 is not electrified, the normally open point of the first relay U1 cannot be electromagnetically attracted, and the normally open point of the first relay U1 is disconnected; when the second relay U2 has current passing through, the coil of the second relay U2 is electrified, and the normally open point of the second relay U2 is electromagnetically attracted; when the second relay U2 does not have current passing through, the coil of the second relay U2 is not electrified, the normally open point of the second relay U2 cannot be electromagnetically attracted, and the normally open point of the second relay U2 is disconnected.
The invention discloses a rope loosening and disorder safety control circuit, which can timely detect abnormal conditions such as rope loosening, line disconnection, grounding or power failure of a voltage signal input end when used for detecting whether rope loosening occurs in a traction rope, and timely detect abnormal conditions such as rope disorder, line disconnection, grounding or power failure of the voltage signal input end when used for detecting whether rope loosening occurs in the traction rope; and immediately controlling the running equipment to stop running after timely detection, so as to prevent safety accidents; the device solves the problems that when abnormal conditions such as rope loosening or rope loosening, line disconnection, grounding or power supply signal input end power failure occur, the device can be timely detected and give out an alarm, and the device in operation is controlled to stop immediately, at the moment, the static device is not allowed to start until the fault is eliminated; the invention not only has the function of rope loosening and disorder protection, but also eliminates safety accidents caused by hidden danger of circuits and the like, and has good safety protection effect.
Correspondingly, the invention also discloses a rope loosening and messing safety control system, regarding the composition, the relevant description can be seen, the repeated parts are not redundant, see fig. 9 and 10, the rope loosening and messing safety control system comprises a winch body, a power supply module, a control module and a rope loosening and messing safety control circuit 300, wherein the rope loosening and messing safety control circuit is used for detecting whether rope loosening or rope messing occurs and carrying out safety control on the winch body, the rope loosening and messing safety control system comprises a power supply signal input end, a safety detection circuit and a detection signal output end, the winch body comprises a grounded hauling rope, a detection part is arranged around the hauling rope, the power supply signal input end is connected with the output end of the power supply module, the input end of the control module is connected with the detection signal output end, the safety detection circuit comprises a first controller and a second controller, the power supply signal input end is respectively connected with the control signal input end of the first controller and the voltage signal input end of the first controller, the control signal output end of the first controller is connected with the voltage signal input end of the first controller, the voltage signal output end of the first controller is connected with the voltage signal output end of the second controller, and the voltage signal output end of the first controller is connected with the voltage signal output end of the voltage controller is connected with the voltage signal output end;
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power module, the rope loosening and disordered safety control circuit 300, the control module and the detection component is not broken or grounded, the control module can receive a voltage signal sent by the power module, input a logic state of high level and control the winch body to continue to operate;
when rope loosening or rope disorder occurs, the detection component is contacted with the traction rope, the control module cannot receive the voltage signal sent by the power supply module, the input logic state is low level, and the winch body is controlled to stop running.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power module, the rope loosening and disordered safety control circuit 300, the control module and the detection component is broken or grounded, the control module cannot receive a voltage signal sent by the power module, inputs a logic state of low level and controls the winch body to stop running;
when the power supply module is abnormal and cannot send out a voltage signal, the control module cannot receive the voltage signal, inputs a logic state of low level and controls the winch body to stop running.
The winding machine body 100 further comprises a winding drum, the detection component is a metal plate, the metal plate is fixed below the winding drum, when rope disorder does not occur, the traction rope wound on the winding drum is not contacted with the metal plate, the winding machine body is not conducted, the metal plate is not grounded, when rope disorder occurs, the traction rope wound on the winding drum is contacted with the metal plate, the winding machine body 100 is conducted, and the metal plate is grounded; or, the metal plate is fixed under any traction rope, when no rope loosening occurs, the traction rope wound on the winding drum is not in contact with the metal plate, the winding drum body 100 is not conducted, the metal plate is not grounded, when rope loosening occurs, the metal plate is in contact with the traction rope, the winding drum body 100 is conducted, and the metal plate is grounded.
The hoist body 100 is a prior art, and the present embodiment will not be described in detail.
Although the present invention has been described with respect to the preferred embodiments, it is not intended to be limited thereto, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and techniques disclosed herein without departing from the spirit and scope of the present invention.

Claims (9)

1. The safety control circuit is used for detecting whether rope loosening or rope loosening occurs or not and carrying out safety control on an external winch body, and comprises a power signal input end, a safety detection circuit and a detection signal output end, wherein the winch body comprises a traction rope which is grounded, and a detection part is arranged around the traction rope;
when the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is not broken or grounded, the detection signal output end can receive a voltage signal sent by the power signal input end, and the output logic state is high and is used as a basis for controlling the continuous operation of the winch body;
When rope loosening or rope disorder occurs, the detection component is contacted with the traction rope, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the logic state is output as a low level and is used as a basis for controlling the winch body to stop running;
when the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is broken or grounded, the detection signal output end cannot receive the voltage signal sent by the power signal input end, and the output logic state is low and is used as the basis for controlling the winch body to stop running;
when the power signal input end cannot receive the voltage signal, the detection signal output end cannot receive the voltage signal, and the output logic state is low level and is used as a basis for controlling the stop operation of the winch body;
the first controller is a first relay U1, the second controller is a second relay U2, a first coil L1 is arranged between a control signal input end and a control signal output end of the first relay U1, when the first coil L1 is electrified, a voltage signal input end and a voltage signal output end of the first relay U1 are conducted, when the first coil L1 is not electrified, the voltage signal input end and the voltage signal output end of the first relay U1 are not conducted, a second coil L2 is arranged between the control signal input end and the control signal output end of the second relay U2, when the second coil L2 is electrified, the voltage signal input end and the voltage signal output end of the second relay U2 are conducted, when the second coil L2 is not electrified, the voltage signal input end and the voltage signal output end of the second relay U2 are not conducted.
2. The rope loosening and disorder safety control circuit according to claim 1, wherein a control signal input end of the first controller is a first pin of the first relay U1, a control signal output end of the first controller is an eighth pin of the first relay U1, a voltage signal input end of the first controller is a third pin of the first relay U1, a voltage signal output end of the first controller is a fourth pin of the first relay U1, a first coil L1 is contained between the first pin of the first relay U1 and the eighth pin of the first relay U1, the third pin of the first relay U1 and the fourth pin of the first relay U1 form a first normally open point of the first relay U1, when the first relay U1 is electrified, the first coil L1 is electrified, and the first normally open point is electromagnetically attracted, and the first pin of the first relay U1 and the fourth pin of the first relay U1 are conducted; when no current flows through the first relay U1, the first coil L1 is not electrified, the first normally open point cannot be electromagnetically attracted, the first normally open point is disconnected, and the third pin of the first relay U1 and the fourth pin of the first relay U1 are not conducted;
The control signal input end of the second controller is a first pin of the second relay U2, the control signal output end of the second controller is an eighth pin of the second relay U2, the voltage signal input end of the second controller is a third pin of the second relay U2, the voltage signal output end of the second controller is a fourth pin of the second relay U2, a second coil L2 is arranged between the first pin of the second relay U2 and the eighth pin of the second relay U2, the third pin of the second relay U2 and the fourth pin of the second relay U2 form a second normally open point of the second relay U2, when the second relay U2 is electrified, the second coil L2 is electromagnetically attracted, and the third pin of the second relay U2 and the fourth pin of the second relay U2 are conducted; when no current flows through the second relay U2, the second coil L2 is not electrified, the second normally open point cannot be in electromagnetic attraction, the second normally open point is disconnected, and the third pin of the second relay U2 and the fourth pin of the second relay U2 are not conducted.
3. The rope loosening and disorder safety control circuit according to claim 2, wherein a first reverse diode D1 connected in parallel with the first relay U1 is further included between the power signal input end and the serial circuit of the detection component, an anode of the first reverse diode D1 is connected with an eighth pin of the first relay U1, a cathode of the first reverse diode D1 is connected with a first pin of the first relay U1, a second reverse diode D3 connected in parallel with the second relay U2 is further included between the detection component and the serial circuit of the second relay U2, an anode of the second reverse diode D3 is connected with an eighth pin of the second relay U2, and a cathode of the second reverse diode D3 is connected with a first pin of the second relay U2.
4. The rope loosening and disorder safety control circuit according to claim 2, wherein when rope loosening or disorder does not occur, the detection component and the traction rope are not in contact, the series circuit of the power signal input end, the safety detection circuit, the detection signal output end and the detection component is not broken or grounded, the power signal input end inputs a voltage signal, the first coil L1 and the second coil L2 have current passing through, the first normally open point and the second normally open point can both attract, the voltage signal sequentially passes through the third pin of the first relay U1, the fourth pin of the first relay U1, the third pin of the second relay U2, and the fourth pin of the second relay is transmitted to the detection signal output end, the detection signal output end receives the voltage signal transmitted by the power signal input end, and the output logic state is a "high level" and is used as a basis for controlling the winch body to continue to operate.
5. The rope loosening and disorder safety control circuit according to claim 2, wherein when rope loosening or rope loosening occurs, the detection component is in contact with the traction rope, a voltage signal is input from the power signal input end, a current passes through the first coil L1, the first normally open point can be attracted, the voltage signal passes through the first pin of the first relay, the eighth pin of the first relay, the detection component and the winding engine body in sequence to reach the ground, no current passes through the second coil L2, the second normally open point cannot be attracted, the voltage signal cannot be transmitted to the detection signal output end through the second relay U2, the voltage signal transmitted from the power signal input end cannot be received by the detection signal output end, and the output logic state is "low level" and is used as a basis for controlling the winding engine body to stop running.
6. The rope loosening and disorder safety control circuit according to claim 2, wherein when rope loosening or disorder does not occur, the detection component and the traction rope are not in contact, but any one of the power signal input end, the safety detection circuit, the detection signal output end and the serial circuit of the detection component is broken, a voltage signal is input to the power signal input end, no current passes through the first coil L1 and the second coil L2, the first normally open point and the second normally open point cannot be attracted, the voltage signal cannot be transmitted to the detection signal output end through the first relay U1 and the second relay U2, the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the output logic state is a low level as a basis for controlling the winch body to stop running.
7. The rope loosening and disorder safety control circuit according to claim 2, wherein when rope loosening or rope loosening does not occur, the detection component and the traction rope are not in contact, any one of the power signal input end, the safety detection circuit, the detection signal output end and the serial circuit of the detection component is grounded, a voltage signal is input to the power signal input end, no current passes through the first coil L1 and/or the second coil L2, the first normally open point and/or the second normally open point cannot be sucked, the voltage signal cannot be transmitted to the detection signal output end through the first relay U1 and/or the second relay U2, and the detection signal output end cannot receive the voltage signal transmitted by the power signal input end, and the input logic state is in a low level state and is used as a basis for controlling the winch body to stop running.
8. A rope loosening and disorder safety control system comprises a winch body, a power supply module, a control module and a rope loosening and disorder safety control circuit; the rope loosening and disorder safety control circuit is used for detecting whether rope loosening or disorder occurs and carrying out safety control on the winch body and comprises a power signal input end, a safety detection circuit and a detection signal output end, wherein the power signal input end is connected with the output end of the power module, the input end of the control module is connected with the detection signal output end, the winch body comprises a traction rope which is grounded, and a detection part is arranged around the traction rope.
When the rope is not loosened or disordered, the detection component is not contacted with the traction rope, any one of the power module, the rope loosening and disordered safety control circuit, the control module and the detection component is not broken or grounded, the control module can receive a voltage signal sent by the power module, inputs a logic state of high level and controls the winch body to continue to operate;
when rope loosening or rope disorder occurs, the detection component is contacted with the traction rope, the control module cannot receive a voltage signal sent by the power supply module, the input logic state is low level, and the winch body is controlled to stop running;
when the rope is not loosened or disordered, the detection component is not contacted with the traction rope, but any one of the power module, the rope loosening and disordered safety control circuit, the control module and the detection component is broken or grounded, the control module cannot receive a voltage signal sent by the power module, inputs a logic state of low level and controls the winch body to stop running;
when the power supply module is abnormal and cannot send out a voltage signal, the control module cannot receive the voltage signal, inputs a logic state of low level and controls the winch body to stop running;
The first controller is a first relay U1, the second controller is a second relay U2, a first coil L1 is arranged between a control signal input end and a control signal output end of the first relay U1, when the first coil L1 is electrified, a voltage signal input end and a voltage signal output end of the first relay U1 are conducted, when the first coil L1 is not electrified, the voltage signal input end and the voltage signal output end of the first relay U1 are not conducted, a second coil L2 is arranged between the control signal input end and the control signal output end of the second relay U2, when the second coil L2 is electrified, the voltage signal input end and the voltage signal output end of the second relay U2 are conducted, when the second coil L2 is not electrified, the voltage signal input end and the voltage signal output end of the second relay U2 are not conducted.
9. The rope loosening and disorder safety control system according to claim 8, wherein the hoist body further comprises a drum, the detection component is a metal plate, the metal plate is fixed below the drum, when rope loosening does not occur, a traction rope wound on the drum is not contacted with the metal plate, the hoist body is not conducted, the metal plate is not grounded, when rope loosening occurs, the traction rope wound on the drum is contacted with the metal plate, the hoist body is conducted, and the metal plate is grounded; or the metal plate is fixed below any traction rope, when the rope is not loosened, the traction rope wound on the winding drum is not contacted with the metal plate, the winding machine body is not conducted, the metal plate is not grounded, when the rope is loosened, the metal plate is contacted with the traction rope, the winding machine body is conducted, and the metal plate is grounded.
CN202111288434.2A 2021-11-02 2021-11-02 Loose and messy rope safety control circuit and system Active CN113934134B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111288434.2A CN113934134B (en) 2021-11-02 2021-11-02 Loose and messy rope safety control circuit and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111288434.2A CN113934134B (en) 2021-11-02 2021-11-02 Loose and messy rope safety control circuit and system

Publications (2)

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