Crushing control system and control method for medical waste treatment equipment

Abstract

The invention provides a crushing control system and a crushing control method for medical waste treatment equipment. The control system comprises an overload protection device electrically connected with a crusher; the controller is electrically connected with the crusher and the overload protection device respectively; the reversal control device is electrically connected with the crusher and the controller respectively; the controller obtains a first working current of the crusher through the overload protection device; generating a first control instruction according to the first working current; according to the first control instruction, a second control instruction is generated after the crusher is controlled by the reverse rotation control device to rotate in the first direction for a preset time; according to the second control instruction, the crusher is controlled to rotate in the second direction through the reverse rotation control device; wherein the first direction is opposite to the second direction. According to the scheme, automatic reverse rotation can be achieved when the motor is overloaded, the motor and related equipment are effectively protected, and the working efficiency of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of control of medical waste treatment equipment, and in particular to a crushing control system and a control method of medical waste treatment equipment. Background Art

[0002] In the process of medical waste treatment, the crusher is a key component used to break medical waste into small pieces for subsequent treatment. However, existing crushers may encounter hard objects or foreign objects (such as medical paper, gauze, etc.) during the treatment process, causing the equipment head to get stuck or damaged, and the motor to overload. Traditional protection measures usually cut off the power supply through fuses or circuit breakers, but this will cause equipment operation interruption and affect treatment efficiency. Summary of the invention

[0003] The present invention provides a crushing control system and a control method for medical waste treatment equipment, so as to solve the problem that traditional protection measures need to cut off the power supply, resulting in interruption of equipment operation and affecting treatment efficiency.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A crushing control system for medical waste treatment equipment, comprising:

[0006] an overload protection device electrically connected to the crusher;

[0007] A controller electrically connected to the crusher and the overload protection device respectively;

[0008] A reversing control device electrically connected to the crusher and the controller respectively;

[0009] The controller obtains a first working current of the crusher through the overload protection device;

[0010] generating a first control instruction according to the first working current;

[0011] According to the first control instruction, the crusher is controlled by the reversing control device to rotate in the first direction for a preset time, and then a second control instruction is generated;

[0012] According to the second control instruction, the crusher is controlled to rotate in a second direction through the reversal control device; wherein the first direction is opposite to the second direction.

[0013] Optionally, the crusher comprises:

[0014] Crushing knife set;

[0015] A drive motor connected to the crushing knife group; the drive motor is electrically connected to the overload protection device;

[0016] A speed reducer electrically connected to the drive motor and configured to reduce the rotation speed of the drive motor;

[0017] When the driving motor drives the crushing knife group to perform crushing, the controller obtains the first working current of the driving motor through the overload protection device.

[0018] Optionally, the driving motor is connected to the crushing knife group via a bracket.

[0019] Optionally, the reversal control device comprises:

[0020] A first three-phase power line, a second three-phase power line and a third three-phase power line electrically connected to a drive motor of the crusher;

[0021] A forward and reverse rotation control circuit connected to the first three-phase power line, the second three-phase power line and the third three-phase power line;

[0022] A motor switch control circuit electrically connected to the forward and reverse control circuit;

[0023] The forward and reverse control circuit switches the phase sequence of the power supply through the first three-phase power line, the second three-phase power line and the third three-phase power line to control the forward and reverse rotation of the drive motor;

[0024] The motor switch control circuit controls the start or stop of the drive motor through the forward and reverse control circuit and the first three-phase power line, the second three-phase power line and the third three-phase power line.

[0025] Optionally, the forward and reverse control circuit includes:

[0026] a first relay and a second relay;

[0027] The first three-phase power line is electrically connected to the first normally open contact of the first relay;

[0028] The first three-phase power line is electrically connected to the second normally closed contact of the second relay;

[0029] The second three-phase power line is electrically connected to the first normally closed contact of the first relay;

[0030] The second three-phase power line is electrically connected to the second normally open contact of the second relay.

[0031] Optionally, the motor switch control circuit includes:

[0032] a third relay, a fourth relay, and a fifth relay;

[0033] a first motor power line, a second motor power line, and a third motor power line;

[0034] The first three-phase power line is electrically connected to the third normally closed contact of the third relay;

[0035] The first three-phase power line is electrically connected to the fourth normally closed contact of the fourth relay;

[0036] The second three-phase power line is electrically connected to the third normally closed contact of the third relay;

[0037] The second three-phase power line is electrically connected to the fourth normally closed contact of the fourth relay;

[0038] The third three-phase power line is electrically connected to the fifth normally open contact of the fifth relay;

[0039] The third three-phase power line is electrically connected to the fifth normally closed contact of the fifth relay;

[0040] The first motor power line is electrically connected to the third normally open contact of the third relay;

[0041] The second motor power line is electrically connected to the fourth normally open contact of the fourth relay;

[0042] The third motor power line is electrically connected to the fifth normally open contact of the fifth relay.

[0043] Optionally, the first relay and the second relay are connected in series with the first power supply via a wire;

[0044] The third relay, the fourth relay and the fifth relay are connected in series with the second power supply through wires.

[0045] Optionally, the crushing control system of the medical waste treatment equipment also includes:

[0046] The display device electrically connected to the controller is used to receive and display the working status of the crusher obtained by the controller.

[0047] Optionally, the crushing control system of the medical waste treatment equipment also includes:

[0048] The alarm device electrically connected to the controller is used to receive the working status of the crusher obtained by the controller and to sound an alarm.

[0049] An embodiment of the present invention further provides a crushing control method for medical waste treatment equipment, which is applied to the system as described above, and the method includes:

[0050] Obtaining a first working current of the crusher;

[0051] generating a first control instruction according to the first working current;

[0052] According to the first control instruction, the crusher is controlled to rotate in the first direction for a preset time by the reversing control device, and then a second control instruction is generated;

[0053] According to the second control instruction, the crusher is controlled to rotate in a second direction by the reversal control device, and the first direction is opposite to the second direction.

[0054] The above solution of the present invention includes at least the following beneficial effects:

[0055] The above scheme of the present invention obtains the first working current of the crusher through the overload protection device through the controller; generates a first control instruction according to the first working current; generates a second control instruction after controlling the crusher to rotate in the first direction for a preset time through the reversing control device according to the first control instruction; controls the crusher to rotate in the second direction through the reversing control device according to the second control instruction, and the first direction is opposite to the second direction. It can automatically reverse when the crusher is overloaded without interrupting the operation of the crusher, avoiding the equipment cutter head from getting stuck or damaged, effectively protecting the crusher, and improving the reliability and processing efficiency of medical waste treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the architecture of a crushing control system of a medical waste treatment device provided by an embodiment of the present invention;

[0057] Figure 2 is a schematic structural diagram of a crusher provided by an embodiment of the present invention;

[0058] Figure 3 is a schematic diagram of the circuit structure of a reversal control device provided by an embodiment of the present invention;

[0059] Figure 4 is a schematic diagram of a controller and an overload protection device provided by an embodiment of the present invention;

[0060] Figure 5 It is a PLC-controlled motor forward and reverse control circuit diagram provided by an embodiment of the present invention;

[0061] Figure 6 is a ladder diagram of a motor forward and reverse control circuit provided by an embodiment of the present invention;

[0062] Figure 7 It is an external wiring diagram of the PLC provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0064] like Figure 1 As shown, an embodiment of the present invention provides a crushing control system for medical waste treatment equipment, comprising:

[0065] An overload protection device 2 electrically connected to the crusher 1;

[0066] A controller 3 electrically connected to the crusher 1 and the overload protection device 2 respectively;

[0067] A reversing control device 4 electrically connected to the crusher 1 and the controller 3 respectively;

[0068] The controller 3 obtains the first working current of the crusher 1 through the overload protection device 2; generates a first control instruction according to the first working current; according to the first control instruction, controls the crusher 1 to rotate in a first direction for a preset time through the reversing control device 4, and then generates a second control instruction; according to the second control instruction, controls the crusher 1 to rotate in a second direction through the reversing control device 4; wherein the first direction is opposite to the second direction.

[0069] In this embodiment, the overload protection device 2 of the crushing control system of the medical waste treatment equipment is used to monitor the working current of the crusher 1 in real time, and transmit the real-time working current data of the crusher 1 to the controller 3. The controller 3 analyzes and processes the real-time working current of the crusher 1. When the controller 3 determines that the real-time working current (i.e., the first working current mentioned above) is within the set working current threshold, the crusher 1 is controlled to operate normally; when the real-time working current of the crusher 1 exceeds the set working current threshold, it is determined that the crusher 1 may encounter hard objects or foreign objects during the processing process, and a jam occurs, resulting in an increase in the load of the crusher 1. At this time, the controller 3 immediately sends a reversal instruction (i.e., the first control instruction mentioned above) to the reversal control device 4. The reversal control device 4 receives the instruction and controls the crusher 1 to reverse (i.e., rotate in the first direction mentioned above) for a predetermined reversal time, releases the load of the crusher 1, and helps to remove the stuck materials or foreign objects. After the reversal process is completed, the controller 3 will re-monitor and determine the working current of the crusher 1. If the current of the crusher 1 is normal, the controller 3 sends a forward rotation instruction (i.e., the second control instruction mentioned above) to control the crusher 1 to re-operate. At this time, the crusher 1 rotates forward (i.e., rotates in the second direction mentioned above) to perform the crushing work.

[0070] The crushing control system of the medical waste treatment equipment of this embodiment can automatically reverse when the crusher is overloaded without interrupting the operation of the equipment, thereby preventing the equipment cutter head from getting stuck or damaged, effectively protecting the crusher, and improving the reliability and treatment efficiency of the medical waste treatment equipment.

[0071] like Figure 2 As shown, in an optional embodiment of the present invention, the crusher 1 comprises:

[0072] Crushing knife group 11;

[0073] A drive motor 12 connected to the crushing blade group 11; the drive motor 12 is electrically connected to the overload protection device 2;

[0074] A speed reducer 13 electrically connected to the drive motor 12 and configured to reduce the rotation speed of the drive motor 12;

[0075] When the driving motor 12 drives the crushing blade group 11 to perform a crushing operation, the controller 3 obtains a first operating current of the driving motor 12 through the overload protection device 2 .

[0076] In this embodiment, the crushing knife group 11 is the core part of the crusher 1, which is used to crush the material. The crushing knife group is usually composed of multiple blades, which cut, tear or impact the input material into smaller particles through a specific arrangement and rotation method. The drive motor 12 is the power source of the crusher 1, and is fixedly connected to the crushing knife group 11 (such as direct connection, belt drive, coupling connection and other transmission structures) to ensure that the power can be efficiently transmitted to the crushing knife group 11, providing the necessary torque and speed for the crushing knife group 11 to drive the crushing knife group 11 to work.

[0077] The drive motor 12 is electrically connected to an overload protection device 2, which is a safety device, such as a current sensor, for monitoring the working state of the drive motor 12. When the drive motor 12 may be damaged due to overload, the overload protection device 2 will cut off the power supply or reduce the motor power in time to protect the drive motor 12 from damage.

[0078] The speed reducer 13 is electrically connected to the drive motor 12, and its main function is to reduce the speed of the motor and increase the torque. This is very important for the crusher 1, because the crushing process usually requires a large torque to cut or tear the material, and the speed of the drive motor 12 is often too high. Directly connecting it to the crushing knife group 11 will cause the blade to wear too quickly or fail to effectively crush the material. Through the speed reducer 13, the output characteristics of the drive motor 12 can be adjusted to make it more suitable for the needs of the crushing work.

[0079] When the drive motor 12 starts working, it drives the crushing knife group 11 to rotate through the transmission structure. At the same time, the overload protection device 2 monitors the working current of the drive motor 12 in real time and transmits the working current data to the controller 3 to ensure that the drive motor 12 operates within a safe range. If the current value is too high, it means that the motor may be under excessive load. At this time, the controller 3 will issue a warning and control the drive motor 12 to reverse to protect the motor and the crusher from damage.

[0080] like Figure 2 As shown, in an optional embodiment of the present invention, the driving motor 12 is fixedly connected to the crushing knife group 11 via a bracket 14 .

[0081] In this embodiment, the bracket 14 is used as a fixing device to fix the drive motor 12 and the crushing knife group 11. The crushing knife group 11 is first installed on the bracket 14, and its position and direction are adjusted. The crushing knife group 11 is aligned with the rotating shaft of the drive motor 12, and then the drive motor 12 is fixedly installed with the bracket 14.

[0082] A transmission device is provided inside the bracket 14 for connecting the crushing knife group 11 and the driving motor 12. Optionally, a belt drive or a coupling drive can be used. If a belt drive is used, the machine shaft of the driving motor 12 is connected to the pulley, and then the belt is connected to the rotating shaft of the crushing knife group 11. Adjust the tension of the belt to ensure transmission efficiency and stability; if a coupling drive is used, the machine shaft of the driving motor 12 is connected to one end of the coupling, and the other end of the coupling is connected to the rotating shaft of the crushing knife group 11. Ensure the accuracy and coaxiality of the coupling to avoid vibration and noise during transmission.

[0083] like Figure 3 As shown, in an optional embodiment of the present invention, the reversal control device 4 includes:

[0084] A first three-phase power line L1, a second three-phase power line L2 and a third three-phase power line L3 electrically connected to the drive motor 12 of the crusher 1;

[0085] A forward and reverse control circuit 41 connected to the first three-phase power line L1, the second three-phase power line L2 and the third three-phase power line L3;

[0086] A motor switch control circuit 42 electrically connected to the forward and reverse control circuit 41;

[0087] The forward and reverse control circuit 41 switches the phase sequence of the power supply through the first three-phase power line L1, the second three-phase power line L2 and the third three-phase power line L3 to control the forward and reverse rotation of the drive motor;

[0088] The motor switch control circuit 42 controls the start or stop of the drive motor through the forward and reverse control circuit 41 and the first three-phase power line L1 , the second three-phase power line L2 and the third three-phase power line L3 .

[0089] In this embodiment, the driving motor of the crusher 1 adopts a three-phase asynchronous motor, and the first three-phase power line L1, the second three-phase power line L2 and the third three-phase power line L3 are electrically connected to the driving motor 12 of the crusher 1 to provide the crusher 1 with a three-phase power supply for driving operation.

[0090] The forward and reverse control circuit 41 is electrically connected to the three-phase power lines L1 , L2 , and L3 and is used to switch the phase sequence of the power supply and control the forward and reverse rotation of the drive motor 12 .

[0091] The motor switch control circuit 42 is electrically connected to the forward and reverse control circuit 41 and is used to control the start and stop of the drive motor 12 .

[0092] The first three-phase power line L1, the second three-phase power line L2 and the third three-phase power line L3 provide power to the driving motor 12 of the crusher 1, and the forward and reverse rotation, reverse rotation, start and stop control of the driving motor 12 are realized through the forward and reverse rotation control circuit 41 and the motor switch control circuit 42. Such a design enables the crusher to flexibly adjust the working state as needed.

[0093] like Figure 3 As shown, in an optional embodiment of the present invention, the forward and reverse control circuit 41 includes:

[0094] A first relay KJ1 and a second relay KJ2;

[0095] The first three-phase power line L1 is electrically connected to the first normally open contact NO1 of the first relay KJ1;

[0096] The first three-phase power line L1 is electrically connected to the second normally closed contact NC2 of the second relay KJ2;

[0097] The second three-phase power line L2 is electrically connected to the first normally closed contact NC1 of the first relay KJ1;

[0098] The second three-phase power line L2 is electrically connected to the second normally open contact NO2 of the second relay KJ2.

[0099] In an optional embodiment of the present invention, the motor switch control circuit 42 includes:

[0100] A third relay KJ3, a fourth relay KJ4 and a fifth relay KJ5;

[0101] A first motor power line U1, a second motor power line U2 and a third motor power line U3;

[0102] The first three-phase power line L1 is electrically connected to the third normally closed contact NC3 of the third relay KJ3;

[0103] The first three-phase power line L1 is electrically connected to the fourth normally closed contact NC4 of the fourth relay KJ4;

[0104] The second three-phase power line L2 is electrically connected to the third normally closed contact NC3 of the third relay KJ3;

[0105] The second three-phase power line L2 is electrically connected to the fourth normally closed contact NC4 of the fourth relay KJ4;

[0106] The third three-phase power line L3 is electrically connected to the fifth normally open contact NO5 of the fifth relay KJ5;

[0107] The third three-phase power line L3 is electrically connected to the fifth normally closed contact NC5 of the fifth relay KJ5;

[0108] The first motor power line U1 is electrically connected to the third normally open contact NO3 of the third relay KJ3;

[0109] The second motor power line U2 is electrically connected to the fourth normally open contact NO4 of the fourth relay KJ4;

[0110] The third motor power line U3 is electrically connected to the fifth normally open contact NO5 of the fifth relay KJ5.

[0111] In the above embodiment, the forward and reverse control circuit 41 includes a first relay KJ1 and a second relay KJ2, and the motor switch control circuit 42 includes a third relay KJ3, a fourth relay KJ4 and a fifth relay KJ5.

[0112] The first three-phase power line L1 is electrically connected to the first normally open contact NO1 of the first relay KJ1, the normally open contact NO3 of the third relay KJ3 and the first motor power line U1 in sequence through a wire; the first three-phase power line L1 is electrically connected to the normally open contact NO1 of the first relay KJ1 and the third normally closed contact NC3 of the third relay KJ3 in sequence through a wire; the first three-phase power line L1 is electrically connected to the second normally closed contact NC2 of the second relay KJ2, the fourth normally closed contact NC4 of the fourth relay KJ4 and the second motor power line U2 in sequence through a wire; the first three-phase power line L1 is electrically connected to the second normally closed contact NC2 of the second relay KJ2 and the third normally closed contact NC3 of the third relay KJ3 in sequence through a wire;

[0113] The second three-phase power line L2 is electrically connected to the first normally closed contact NC1 of the first relay KJ1, the third normally open contact NO3 of the third relay KJ3 and the first motor power line U1 in sequence through a wire; the second three-phase power line L2 is electrically connected to the first normally closed contact NC1 of the first relay KJ1 and the third normally closed contact NC3 of the third relay KJ3 in sequence through a wire; the second three-phase power line L2 is electrically connected to the second normally open contact NO2 of the second relay KJ2, the fourth normally open contact NO4 of the fourth relay KJ4 and the second motor power line U2 in sequence through a wire; the second three-phase power line L2 is electrically connected to the second normally open contact NO2 of the second relay KJ2 and the fourth normally closed contact NC4 of the fourth relay KJ4 in sequence through a wire;

[0114] The third three-phase power line L3 is electrically connected to the fifth normally open contact NO5 of the fifth relay KJ5 and the third motor power line U3 in sequence through wires.

[0115] The first motor power line U1 , the second motor power line U2 , and the third motor power line U3 are connected to the driving motor 12 through the motor junction box 15 .

[0116] The motor works forward: when the first power supply DC1 and the second power supply DC2 are both energized, the first normally open contact NO1 of the first relay KJ1, the second normally open contact NO2 of the second relay KJ2, the third normally open contact NO3 of the third relay KJ3, the second normally open contact NO4 of the fourth relay KJ4 and the fifth normally open contact NO5 of the fifth relay KJ5 are all in a closed state, the first normally closed contact NC1 of the first relay KJ1 and the second normally closed contact NC2 of the second relay KJ2 are both in an open state, the first three-phase power line L1 is connected to the first motor power line U1, the second three-phase power line L2 is connected to the second motor power line U2, the third three-phase power line L3 is connected to the third motor power line U3, and the drive motor 12 is powered on and works forward at this time.

[0117] The motor reverses: the first power supply DC1 is powered off, the second power supply DC2 is powered on, the first normally closed contact NC1 of the first relay KJ1, the second normally closed contact NC2 of the second relay KJ2, the third normally open contact NO3 of the third relay KJ3, the fourth normally open contact NO4 of the fourth relay KJ4 and the fifth normally open contact NO5 of the fifth relay KJ5 are all in a closed state, the first normally open contact NO1 of the first relay KJ1 and the second normally open contact NO2 of the second relay KJ2 are both in a disconnected state, the first three-phase power line L1 is connected to the second motor power line U2, the second three-phase power line L2 is connected to the first motor power line U1, the third three-phase power line L3 is connected to the third motor power line U3, and the drive motor 12 is powered on and reverses at this time.

[0118] In an optional embodiment of the present invention, the first relay KJ1 and the second relay KJ2 are connected in series with the first power supply DC1 through a wire;

[0119] The third relay KJ3, the fourth relay KJ4 and the fifth relay KJ5 are connected in series with the second power supply DC2 via wires.

[0120] In this embodiment, the first relay KJ1 and the second relay KJ2 are connected in series with the first power supply DC1 through a wire, and the third relay KJ3, the fourth relay KJ4 and the fifth relay KJ5 are connected in series with the second power supply DC2 through a wire. The first relay KJ1, the second relay KJ2, the third relay KJ3, the fourth relay KJ4 and the fifth relay KJ5 all adopt single-pole switch relays.

[0121] Of course, the above-mentioned reversal control device 4 can also control the reversal operation of the drive motor by means of programmable logic control, and control the reversal duration of the drive motor 12 according to the duration set by the timer;

[0122] In one practicable manner, a PLC (Programmable Logic Controller) is electrically connected to the motor control circuit in the reversing control device 4 to control the forward and reverse rotation of the drive motor 12. Figure 5 The following is the PLC-controlled motor forward and reverse control circuit diagram. Figure 6 The ladder diagram of the motor forward and reverse control circuit is shown in FIG. In this embodiment, the coil drive instruction is used to realize the start, reverse and stop control of the motor. Figure 5 In the figure, B0 is the motor forward control coil, B1 is the motor reverse control coil, SB1 is the motor stop switch, SB2 is the forward start switch, SB3 is the reverse start switch, coil A0, coil A1, coil A2, motor forward control coil B0, and motor reverse control coil B1 are all arranged in the PLC; wherein the forward start switch SB2 is electrically connected to coil A0, coil A0 is electrically connected to the motor forward control coil B0, the reverse start switch SB3 is electrically connected to coil A1, the motor reverse control coil B1 is electrically connected to coil A1, the motor stop switch SB1 is electrically connected to coil A2, coil A2 is electrically connected to coil B0, and coil B0 and coil B1 are both electrically connected to the drive motor 12.

[0123] The motor works forward: the forward start switch SB2 is electrically connected to the coil A0. Closing the forward start switch SB2 controls the normally open contact of the coil A0 to be connected, and the coil B0 is turned on, so that the coil of the first contactor KM1 is energized, and the motor starts to run forward;

[0124] The motor stops working: the motor stop switch SB1 is electrically connected to the coil A2. When the stop switch SB1 is closed, the normally closed contact of the control coil A2 is disconnected, so that the coil B0 is de-energized and the drive motor 12 stops running;

[0125] Motor reverse operation: Figure 6 In the embodiment, the normally closed contacts of the motor forward control coil B0 and the motor reverse control coil B1 are connected in series with each other's coils respectively, which can ensure that they will not be in the open state at the same time, so the coils of the first contactor KM1 and the second contactor KM2 will not be energized at the same time, and the circuit interlocking is realized. In addition, in order to facilitate operation and ensure that the motor forward control coil B0 and the motor reverse control coil B1 are not in the open state at the same time, the normally closed contact of coil A1 is also connected in series with the coil of the motor forward control coil B0, and the normally closed contact of coil A0 is connected in series with the coil of the motor reverse control coil B1. When B0 is in the open state, the motor rotates forward at this time. If you want to change to reverse operation at this time, you don't need to close the motor stop switch SB1, just close the reverse start switch SB3, coil A1 is turned on, its normally closed contact is disconnected, so that the motor forward control coil B0 is disconnected, and at the same time the normally open contact of coil A1 is turned on, so that the motor reverse control coil B1 is turned on, and the drive motor 12 changes from forward to reverse.

[0126] like Figure 7 The figure shows the external wiring diagram of the PLC. If the main contact of a contactor is welded by the arc generated when the power is cut off due to excessive current in the main circuit or poor quality of the contactor, and the main contact of the coil is still connected after the power is cut off, if the wiring diagram of another contactor is energized, it will still cause a three-phase power short circuit accident. In order to prevent this situation, in this embodiment, a hardware interlocking circuit composed of the auxiliary normally closed contacts of the first contactor KM1 and the second contactor KM2 is set outside the PLC. Assuming that the main contact of the first contactor KM1 is welded by the arc, the auxiliary normally closed contact connected in series with the coil of the second contactor KM2 is in a disconnected state, so the coil of the second contactor KM2 cannot be powered.

[0127] like Figure 5 The FR in the figure is a thermal relay for overload protection. When the motor is seriously overloaded for a long time, after a certain delay, the normally closed contact of the thermal relay FR is disconnected and the normally open contact is closed. Its normally closed contact is connected in series with the coil of the contactor. When overloaded, the contactor coil is de-energized and the motor stops running, which plays a protective role.

[0128] In an optional embodiment of the present invention, the crushing control system of the medical waste treatment equipment further includes:

[0129] The display device 5 electrically connected to the controller 3 is used to receive the working status of the crusher 1 obtained by the controller 3 and display it.

[0130] In this embodiment, the crushing control system of the medical waste treatment equipment also includes a display device 5 electrically connected to the controller 3 to receive and display the working status of the crusher 1. Specifically, the display device 5 is a device that can display information. It can be a touch screen, a liquid crystal display, an LED display, a digital tube or other types of display devices. Its main function is to present the received information in a visual way so that the user can intuitively understand the status or operating parameters of the equipment. After receiving the information sent by the controller 3, the display device 5 will display the information in the form of numbers, graphics, text, etc. By observing the information on the display device 5, the user can intuitively understand the current working status of the crusher 1, such as whether the motor is operating normally, how the crushing efficiency is, whether it needs to be shut down for maintenance, etc., thereby ensuring the safe and efficient operation of the crusher.

[0131] The display device 5 can be connected by wire (such as through a cable or data line) or by wireless connection (such as through wireless communication technologies such as Bluetooth, Wi-Fi, etc.). The electrical connection ensures that the controller 3 can transmit information to the display device 5.

[0132] In an optional embodiment of the present invention, the crushing control system of the medical waste treatment equipment further includes:

[0133] The alarm device 6 electrically connected to the controller 3 is used to receive the working status of the crusher 1 obtained by the controller 3 and issue an alarm.

[0134] In this embodiment, the crushing control system of the medical waste treatment equipment also includes:

[0135] The alarm device 6 is electrically connected to the controller 3 to receive and respond to the working status information of the crusher 1, and trigger the alarm mechanism when an abnormal or dangerous situation is detected. Specifically, the alarm device 6 is a device that can send an alarm signal. It can be a sound alarm (such as a buzzer, a warning bell), a light alarm (such as a flash light, an LED light), or a composite alarm that contains both sound and light signals. Its main function is to alert the staff to pay attention and take corresponding measures by sending sound, light or other forms of signals when an abnormal or dangerous situation is detected.

[0136] The alarm device 6 is electrically connected to the controller 3, and this connection can be a wired connection (such as through a cable, a data line, etc.) or a wireless connection (such as through wireless communication technologies such as Bluetooth, Wi-Fi, Zigbee, etc.). The electrical connection ensures that the controller 3 can transmit the detected working status information of the crusher 1 to the alarm device 6 in real time. When the controller 3 detects that the working current of the crusher 1 exceeds the normal range, that is, it is judged to be an abnormal or dangerous situation, it will send this information to the alarm device 6 through the electrical connection. Thereby ensuring the safe and efficient operation of the crusher, while also protecting the personal safety of the staff.

[0137] like Figure 4 As shown, in an optional embodiment of the present invention, the controller 3 adopts a controller with product model 6ES7288-3AE04-0AA0, the overload protection device 2 adopts a current detection transmitter, the overload protection device 2 is electrically connected to the controller 3, the overload protection device 2 detects the real-time working current of the crusher 1, and transmits the current data signal to the controller 3.

[0138] The crushing control system of the medical waste treatment equipment described in the above embodiments of the present invention, through the cooperation of the crusher 1, the overload protection device 2, the controller 3, the reversal control device 4, the display device 5, and the alarm device 6, can handle the overload condition of the crusher without interrupting the operation of the equipment, and can automatically reverse the crusher when overloaded to avoid the equipment head from getting stuck or damaged, effectively protect the crusher, and improve the reliability and treatment efficiency of the medical waste treatment equipment.

[0139] An embodiment of the present invention further provides a crushing control method for medical waste treatment equipment, which is applied to the system described in the above embodiment, and the method includes:

[0140] Step 1, obtaining a first working current of the crusher 1;

[0141] Step 2, generating a first control instruction according to the first working current;

[0142] Step 3, according to the first control instruction, the crusher 1 is controlled to rotate in the first direction for a preset time by the reversing control device 4, and then a second control instruction is generated;

[0143] Step 4: According to the second control instruction, the reversing control device 4 controls the crusher 1 to rotate in a second direction, wherein the first direction is opposite to the second direction.

[0144] In this embodiment, the controller 3 obtains the first working current of the crusher 1 by monitoring the overload protection device 2 electrically connected to the crusher 1. The controller 3 judges the first working current. When the first working current is greater than a preset current threshold, a first control instruction is generated to control the power supply of the crusher 1 to be disconnected, and the reversing control device 4 is controlled to start. The reversing control device 4 controls the crusher 1 to rotate in the first direction for a preset time.

[0145] Specifically, the first working current is the working current when the crusher 1 rotates forward to crush the medical waste material, the preset current threshold is set to 12 mA, the first direction is the reverse rotation direction of the crusher 1, and the preset time is set to a reversal time of 3 seconds.

[0146] After the crusher 1 rotates in the first direction for a preset time, the controller 3 obtains the second working current of the crusher 1; the controller 3 judges the second working current, and when the second working current is still greater than the preset current threshold, the controller 3 controls the crusher 1 to continue to reverse; when the second working current is less than or equal to the preset current threshold, a second control instruction is generated, so that the reversal control device 4 is closed, and the crusher 1 is controlled to restart, and the crusher 1 rotates in the first direction to resume crushing work.

[0147] The crushing control method for medical waste treatment equipment of this embodiment automatically determines and controls the crusher 1 to automatically reverse when overloaded according to the real-time working current of the crusher 1 through the controller 3, which can effectively prevent motor damage and improve the reliability and processing efficiency of the medical waste treatment equipment.

[0148] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0149] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0150] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0151] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0152] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0153] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, RO41, RA41, disk or CD, etc., which can store program codes.

[0154] In addition, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. Moreover, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it is understood that all or any steps or components of the method and apparatus of the present invention can be implemented in any computing device (including processors, storage media, etc.) or a network of computing devices in hardware, firmware, software or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0155] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general device. Therefore, the purpose of the present invention can also be achieved by simply providing a program product containing a program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order. Some steps can be performed in parallel or independently of each other.

[0156] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crushing control system for medical waste treatment equipment, characterized in that: include: an overload protection device (2) electrically connected to the crusher (1); A controller (3) electrically connected to the crusher (1) and the overload protection device (2) respectively; a reversing control device (4) electrically connected to the crusher (1) and the controller (3) respectively; The controller (3) obtains a first working current of the crusher (1) through the overload protection device (2); and generates a first control instruction according to the first working current; According to the first control instruction, the crusher (1) is controlled to rotate in a first direction for a preset time by the reversing control device (4), and then a second control instruction is generated; according to the second control instruction, the crusher (1) is controlled to rotate in a second direction by the reversing control device (4); wherein the first direction is opposite to the second direction.

2. The crushing control system of medical waste treatment equipment according to claim 1, characterized in that: The crusher (1) comprises: Crushing knife group (11); a drive motor (12) connected to the crushing blade group (11), wherein the drive motor (12) is electrically connected to the overload protection device (2); A speed reducer (13) electrically connected to the drive motor (12) and configured to reduce the rotation speed of the drive motor (12); When the driving motor (12) drives the crushing knife group (11) to perform crushing work, the controller (3) obtains the first working current of the driving motor (12) through the overload protection device (2).

3. The crushing control system of medical waste treatment equipment according to claim 2, characterized in that: The driving motor (12) is fixedly connected to the crushing knife group (11) via a bracket (14).

4. The crushing control system of medical waste treatment equipment according to claim 2, characterized in that: The reversal control device (4) comprises: A first three-phase power line (L1), a second three-phase power line (L2) and a third three-phase power line (L3) electrically connected to the drive motor (12) of the crusher (1); a forward and reverse rotation control circuit (41) connected to the first three-phase power line (L1), the second three-phase power line (L2) and the third three-phase power line (L3); A motor switch control circuit (42) electrically connected to the forward and reverse rotation control circuit (41); The forward and reverse control circuit (41) switches the phase sequence of the power supply through the first three-phase power line (L1), the second three-phase power line (L2) and the third three-phase power line (L3) to control the forward and reverse rotation of the drive motor; The motor switch control circuit (42) controls the start or stop of the drive motor through the forward and reverse control circuit (41) and the first three-phase power line (L1), the second three-phase power line (L2) and the third three-phase power line (L3).

5. The crushing control system of medical waste treatment equipment according to claim 4, characterized in that: The forward and reverse control circuit (41) comprises: The first relay (KJ1) and the second relay (KJ2); The first three-phase power line (L1) is electrically connected to the first normally open contact (NO1) of the first relay (KJ1); The first three-phase power line (L1) is electrically connected to the second normally closed contact (NC2) of the second relay (KJ2); The second three-phase power line (L2) is electrically connected to the first normally closed contact (NC1) of the first relay (KJ1); The second three-phase power line (L2) is electrically connected to the second normally open contact (NO2) of the second relay (KJ2).

6. The crushing control system of medical waste treatment equipment according to claim 5, characterized in that: The motor switch control circuit (42) comprises: The third relay (KJ3), the fourth relay (KJ4) and the fifth relay (KJ5); A first motor power line (U1), a second motor power line (U2) and a third motor power line (U3); The first three-phase power line (L1) is electrically connected to the third normally closed contact (NC3) of the third relay (KJ3); The first three-phase power line (L1) is electrically connected to the fourth normally closed contact (NC4) of the fourth relay (KJ4); The second three-phase power line (L2) is electrically connected to the third normally closed contact (NC3) of the third relay (KJ3); The second three-phase power line (L2) is electrically connected to the fourth normally closed contact (NC4) of the fourth relay (KJ4); The third three-phase power line (L3) is electrically connected to the fifth normally open contact (NO5) of the fifth relay (KJ5); The third three-phase power line (L3) is electrically connected to the fifth normally closed contact (NC5) of the fifth relay (KJ5); The first motor power line (U1) is electrically connected to the third normally open contact (NO3) of the third relay (KJ3); The second motor power line (U2) is electrically connected to the fourth normally open contact (NO4) of the fourth relay (KJ4); The third motor power line (U3) is electrically connected to the fifth normally open contact (NO5) of the fifth relay (KJ5).

7. The crushing control system of medical waste treatment equipment according to claim 6, characterized in that: The first relay (KJ1) and the second relay (KJ2) are connected in series with the first power supply (DC1) via a wire; The third relay (KJ3), the fourth relay (KJ4) and the fifth relay (KJ5) are connected in series with the second power supply (DC2) via conductive wires.

8. The crushing control system of medical waste treatment equipment according to claim 1, characterized in that: Also includes: A display device (5) electrically connected to the controller (3) is used to receive the working status of the crusher (1) obtained by the controller (3) and display it.

9. The crushing control system of medical waste treatment equipment according to claim 1, characterized in that: Also includes: An alarm device (6) electrically connected to the controller (3) is used to receive the working status of the crusher (1) obtained by the controller (3) and to sound an alarm.

10. A crushing control method for medical waste treatment equipment, characterized in that: Applied to the system according to any one of claims 1 to 9, the method comprises: Obtaining a first working current of a crusher (1); generating a first control instruction according to the first working current; According to the first control instruction, the crusher (1) is controlled to rotate in the first direction for a preset time by a reversing control device (4), and then a second control instruction is generated; According to the second control instruction, the crusher (1) is controlled to rotate in a second direction through the reversal control device (4); wherein the first direction is opposite to the second direction.

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