Safety protection system for concrete modular building production line

Abstract

The utility model discloses a safety protection system for a concrete modular building production line. The safety protection system comprises a PLC (Programmable Logic Controller), a driver, a relay KA1, an emergency stop switch, a safety optical grating, a safety door lock and a safety relay group, the PLC is in communication connection with the relay KA1, and outputs a control signal to control the normally closed contact of the relay KA1 to be disconnected; the relay KA1 is in communication connection with the driver, and controls the driver to output a power supply to supply power to the motor through on-off of a normally open contact; the driver controls the motor to operate for concrete mixing operation; the safety relay set is in communication connection with the PLC and comprises a first safety relay in communication connection with the emergency stop switch, a second safety relay in communication connection with the safety grating and a third safety relay in communication connection with the safety door lock. According to the safety protection system disclosed by the utility model, the PLC is arranged to monitor safety signals, and outputs signals to cut off a motor power structure in an abnormal condition, so that the safety of operators is ensured.

Description

Technical Field

[0001] The embodiments of the present utility model belong to the technical field of production line safety protection, and more specifically, relate to a safety protection system for a concrete modular building production line. Background Art

[0002] The MiC concrete production line refers to the production method of Modular Integrated Construction (MiC), an assembled construction technology that breaks down buildings into modular "units." These units undergo factory-installed construction, including structural design, furnishing, plumbing, equipment piping, and bathroom fixtures. They are then transported to the construction site and rapidly assembled into the building using reliable connection technology. The MiC concrete production line utilizes a large amount of heavy electrical equipment, making it prone to safety accidents if untrained personnel enter the production area.

[0003] At present, the safety protection of concrete Mic production lines generally uses guardrails to isolate the production area, supplemented by signal facilities and safety protection signs to remind workers of their life safety. However, when non-professionals suddenly enter the site or when equipment malfunctions, it cannot provide protection for entrants, which may cause safety accidents and damage to personnel and equipment.

[0004] Therefore, at this stage, there is an urgent need for a safety protection system for concrete modular building production lines, which can monitor the normal operation of equipment in the production area and whether there are intruders during production line operation, and promptly cut off the power output of the production line equipment motor to ensure personal safety. Summary of the Invention

[0005] In view of the existing technology, the concrete Mic production line is prone to safety accidents and damage to personnel and equipment when non-professionals suddenly enter the site or when the equipment malfunctions. The utility model provides a safety protection system for a concrete modular building production line to solve such problems.

[0006] In order to achieve the above-mentioned object, the utility model provides a safety protection system for a concrete modular building production line, comprising a PLC controller, a driver, a relay KA1, an emergency stop switch, a safety light grid, a safety door lock and a safety relay group;

[0007] The PLC controller is communicatively connected to the relay KA1, and its output control signal controls the normally closed contact of the relay KA1 to disconnect; the relay KA1 is communicatively connected to the driver, and controls the driver output power supply to supply power to the motor by opening and closing the normally open contact; the driver is electrically connected to the motor to control the operation of the motor to perform concrete mixing operations; the safety relay group is communicatively connected to the PLC controller, and includes a first safety relay communicatively connected to the emergency stop switch, a second safety relay communicatively connected to the safety grating, and a third safety relay communicatively connected to the safety door lock.

[0008] Furthermore, the PLC controller is connected to a 24V power supply for operation, and its pin I0.0 is connected to the first safety relay for communication and is used to receive an emergency stop signal, pin I0.1 is connected to the second safety relay for communication and is used to receive a safety grating signal, and pin I0.2 is connected to the third safety relay for communication and is used to receive an unlocking signal.

[0009] Furthermore, both ends of the normally closed contact of the emergency stop switch are respectively connected to pin S12 and pin S52 of the first safety relay, and the normally closed contact is disconnected, controlling pin 14 of the first safety relay to output an emergency stop signal.

[0010] Furthermore, the safety grating signal output end is connected to the pins S12 and S52 of the second safety relay respectively, and the output end outputs a low-level signal to control the pin 14 of the second safety relay to output the safety grating signal.

[0011] Furthermore, the normally closed contact of the safety door lock is connected to the pin S12 and the pin S52 of the third safety relay, and the normally closed contact is disconnected, controlling the pin 14 of the third safety relay to output an unlocking signal.

[0012] Furthermore, pin A2 of the relay KA1 is connected to a 0V power supply, where A1 and A2 are the pins at both ends of the coil. When pin A2 receives a high-level signal of a power-off instruction, the coil is energized, causing the normally closed contact group of the relay KA1 to be disconnected.

[0013] Furthermore, the normally closed contact group of the relay KA1 includes a first normally closed contact and a second normally closed contact, wherein the pins at both ends of the first normally closed contact are COM1 and NO1 respectively, the COM1 is connected to the L of the 220V power supply, and NO1 is connected to the pin L1 of the driver; the pins at both ends of the second normally closed contact are COM2 and NO2 respectively, the COM1 is connected to the N of the 220V power supply, and NO2 is connected to the pin L2 of the driver.

[0014] Furthermore, the first safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply; the second safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply; the third safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply.

[0015] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0016] (1) The safety protection system of the utility model can monitor whether the equipment in the production area is operating normally or whether there are intruders. When an abnormal situation occurs, the PLC controller sends a power-off command to quickly cut off the motor power structure of the concrete Mic production line equipment to ensure personal safety.

[0017] (2) The safety protection system of the present invention is provided with a PLC controller. When the power-off command signal issued by the PLC controller is not released, the machine cannot start suddenly, thereby preventing accidental injury to people.

[0018] (3) The safety protection system of the present invention has low false operation and high safety by providing a safety relay group, which can protect machines and operators of different levels and avoid the danger of direct contact with high-voltage switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the electrical principle of a safety protection system for a concrete modular building production line according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the principle of the safety protection system in an embodiment of the present utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] like Figure 1-2As shown, the present invention provides a safety protection system for a concrete modular building production line, comprising a PLC controller, a driver, a relay KA1, an emergency stop switch, a safety light barrier, a safety door lock, and a safety relay group. The PLC controller is in communication with relay KA1, and its output control signal controls the opening of relay KA1's normally closed contacts. Relay KA1 is in communication with the driver, and by opening and closing its normally open contacts, controls the driver's output power supply to the motor. The driver is electrically connected to the motor to control the motor's operation to perform concrete mixing operations. The safety relay group is in communication with the PLC controller and includes a first safety relay in communication with the emergency stop switch, a second safety relay in communication with the safety light barrier, and a third safety relay in communication with the safety door lock. The safety protection system of the present invention utilizes a PLC controller to monitor changes in the emergency stop, safety light barrier, and safety door input signals. In the event of an abnormality, it can output a signal to shut down the motor power structure, causing the entire concrete MIC production line equipment's motor power structure to cease operation, ensuring operator safety and preventing accidents.

[0023] like Figure 1 As shown, in this embodiment of the present invention, the emergency stop switch is used to urgently stop the production line. The two ends of its normally closed contact are respectively connected to pins S12 and S52 of the first safety relay. If an operator discovers an abnormal condition in the production line equipment, he presses the emergency stop switch, and the normally closed contact opens, causing pins 13 and 14 of the first safety relay to conduct, thereby controlling pin 14 of the first safety relay to output an emergency stop signal. This signal is a valid 0V signal. After the emergency stop signal is sent to the PLC controller, the PLC controller issues a power-off command based on the emergency stop signal, controlling the motor power structure of the production line equipment to stop operation, thereby preventing damage to the equipment and operators.

[0024] The safety grating detects whether there is an intruder in the production line area, and its signal output end is connected to pin S12 and pin S52 of the second safety relay respectively; when a person intrudes into the production line area, the infrared light beam emitted by the safety grating is blocked, and its signal output end outputs a low-level signal, controlling pin 14 of the second safety relay to output a safety grating signal. After the safety grating signal is sent to the PLC controller, the PLC controller issues a power-off command according to the emergency stop signal, controlling the motor power structure of the production line equipment to stop running, thereby avoiding damage to the equipment and operators.

[0025] The safety door lock controls the door's opening and closing by generating a magnetic field through electric current. Its normally closed contacts are connected to pins S12 and S52 of the third safety relay. If an operator accidentally opens the safety door, the normally closed contacts open, causing pin 14 of the third safety relay to output an unlock signal. This unlock signal is then transmitted to the PLC controller, which, in response to an emergency stop signal, issues a power-off command, halting the motor power structure of the production line equipment to prevent damage to the equipment and the operator.

[0026] In this embodiment, a safety relay assembly is provided to minimize false tripping and provide high safety, protecting machinery and operators at various levels from the dangers of direct contact with high-voltage switches. Pin A1 of the first safety relay is connected to a 24V power supply, while pins A2 and 13 are connected to a 0V power supply. Pins S12 and S52 are connected to the normally closed contacts of the emergency stop switch. Pin 14 is connected to pin 10.0 of a PLC controller to transmit an emergency stop signal to the PLC controller.

[0027] Pin A1 of the second safety relay is connected to a 24V power supply, pins A2 and 13 are connected to a 0V power supply, pins S12 and S52 are connected to the two ends of the normally closed contact of the emergency stop switch, and pin 14 is connected to pin I0.1 of the PLC controller to send a safety grating signal to the PLC controller.

[0028] Pin A1 of the third safety relay is connected to a 24V power supply, pins A2 and 13 are connected to a 0V power supply, pins S12 and S52 are connected to the two ends of the normally closed contact of the emergency stop switch, and pin 14 is connected to pin I0.2 of the PLC controller to send an unlocking signal to the PLC controller.

[0029] The PLC controller is connected to a 24V power supply for operation. After receiving the emergency stop signal, safety grating signal, and unlocking signal respectively, it outputs a power-off command signal through pin Q0.0. Pin Q0.0 is connected to pin A1 of relay KA1, and the power-off command signal is a high-level signal.

[0030] Pin A2 of relay KA1 is connected to a 0V power supply. Pins A1 and A2 are the two terminals of the coil. When pin A2 receives a high-level signal indicating a power-off command, the coil is energized, opening the normally closed contact group of relay KA1. The normally closed contact group of relay KA1 includes a first normally closed contact and a second normally closed contact. The first normally closed contact has two terminals, COM1 and NO1. COM1 is connected to the L pin of the 220V power supply, and NO1 is connected to pin L1 of the driver. The second normally closed contact has two terminals, COM2 and NO2. COM1 is connected to the N pin of the 220V power supply, and NO2 is connected to pin L2 of the driver. The power-off command energizes the coil of relay KA1, opening the normally closed contact group and disconnecting the 220V power supply to the driver. The driver no longer provides power, and the motor stops rotating.

[0031] The safety protection system of the utility model is that when the operator finds that the production line equipment is in an abnormal condition, he presses the emergency stop switch, the normally closed contact of the emergency stop switch is disconnected, and the pin 14 of the first safety relay is controlled to output an emergency stop signal; the safety grating detects the presence of intruders in the production line area, and its signal output end outputs a low-level signal, which controls the 14th pin of the second safety relay to output a safety grating signal; when the operator accidentally opens the safety door during operation, the normally closed contact of the safety door lock is disconnected, and the pin 14 of the third safety relay is controlled to output an unlocking signal; that is, the safety protection system of the utility model is equipped with a PLC controller for monitoring The PLC controls the changes in the emergency stop, safety light barrier, and safety door input signals. In abnormal situations, such as when the PLC-controlled pin I0.0 receives an emergency stop signal, the pin I0.1 receives a safety light barrier signal, or the pin I0.2 receives an unlock signal, its output pin Q0.0 outputs a power-off command signal and sends the high-level signal to the pin A1 of the relay KA1, energizing the coil and disconnecting the normally closed contact group of the relay KA1. This disconnects the 220V power supply to the driver, and the driver no longer provides power. The motor will stop rotating, and the motor power structure of the production line equipment will stop running, avoiding damage to the equipment and operators.

[0032] The safety protection system of this utility model can monitor whether the equipment in the production area is operating normally or whether there are intruders. When an abnormal situation occurs, the PLC controller sends a power-off command to quickly cut off the motor power structure of the concrete Mic production line equipment to ensure personal safety.

[0033] The safety protection system of the utility model is provided with a PLC controller. When the power-off instruction signal issued by the PLC controller is not released, the machine cannot start suddenly, thereby preventing accidental injury to people.

[0034] The safety protection system of the utility model has low false operation and high safety by being provided with a safety relay group, and can protect machines and operators of different levels and avoid the danger of direct contact with high-voltage switches.

[0035] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety protection system for a concrete modular building production line, characterized in that: include: PLC controller, driver, relay KA1, emergency stop switch, safety light grid, safety door lock and safety relay group; The PLC controller is communicatively connected to the relay KA1, and its output control signal controls the normally closed contact of the relay KA1 to disconnect; the relay KA1 is communicatively connected to the driver, and controls the driver output power supply to supply power to the motor by opening and closing the normally open contact; the driver is electrically connected to the motor to control the operation of the motor to perform concrete mixing operations; the safety relay group is communicatively connected to the PLC controller, and includes a first safety relay communicatively connected to the emergency stop switch, a second safety relay communicatively connected to the safety grating, and a third safety relay communicatively connected to the safety door lock.

2. A safety protection system for a concrete modular building production line according to claim 1, characterized in that: The PLC controller is connected to a 24V power supply for operation, and its pin I0.0 is connected to the first safety relay for communication and receiving an emergency stop signal, pin I0.1 is connected to the second safety relay for communication and receiving a safety grating signal, and pin I0.2 is connected to the third safety relay for communication and receiving an unlock signal.

3. A safety protection system for a concrete modular building production line according to any one of claims 1-2, characterized in that: The two ends of the normally closed point of the emergency stop switch are respectively connected to the pin S12 and the pin S52 of the first safety relay. The normally closed point is disconnected to control the pin 14 of the first safety relay to output an emergency stop signal.

4. A safety protection system for a concrete modular building production line according to any one of claims 1-2, characterized in that: The safety grating output end is connected to the pins S12 and S52 of the second safety relay respectively, and the output end outputs a low level signal to control the pin 14 of the second safety relay to output the safety grating signal.

5. A safety protection system for a concrete modular building production line according to any one of claims 1-2, characterized in that: The normally closed contact of the safety door lock is connected to the pin S12 and the pin S52 of the third safety relay. When the normally closed contact is disconnected, the pin 14 of the third safety relay is controlled to output an unlocking signal.

6. A safety protection system for a concrete modular building production line according to any one of claims 1-2, characterized in that: Pin A2 of the relay KA1 is connected to a 0V power supply, where A1 and A2 are the two end pins of the coil. When pin A2 receives a high level signal of a power-off instruction, the coil is energized, and the normally closed contact group of the relay KA1 is opened.

7. A safety protection system for a concrete modular building production line according to claim 6, characterized in that: The normally closed contact group of the relay KA1 includes a first normally closed contact and a second normally closed contact, wherein the pins at both ends of the first normally closed contact are COM1 and NO1 respectively, the COM1 is connected to the L of the 220V power supply, and NO1 is connected to the pin L1 of the driver; the pins at both ends of the second normally closed contact are COM2 and NO2 respectively, the COM1 is connected to the N of the 220V power supply, and NO2 is connected to the pin L2 of the driver.

8. A safety protection system for a concrete modular building production line according to any one of claims 1-2, characterized in that: The first safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply; the second safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply; the third safety relay pin A1 is connected to a 24V power supply, and pins A2 and 13 are connected to a 0V power supply.

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