An emergency stop protection circuit and mechanical device

Abstract

This application discloses an emergency stop protection circuit and a mechanical device. The emergency stop protection circuit includes: a start / stop circuit, including a first button and a second button, receiving a first power supply from a power supply circuit; a first switch circuit, which, when the first button and the second button are in a first working state, receives the first power supply from the first button and the second button and supplies the first power supply to a first load circuit, and does not receive the first power supply when the first button and / or the second button are in a second working state; and a control circuit, which receives the second power supply from the power supply circuit, and, when the first button is in the second working state, receives a switch signal sent by the first switch circuit and sends a first control signal to the second load circuit. The emergency stop protection circuit in this application, by setting two emergency stop switches, can reliably and promptly cut off the power to the first load circuit when necessary, while simultaneously ensuring continuous power supply control to the second load circuit.

Description

Technical Field

[0001] This application relates to the field of circuit control technology, and in particular to an emergency stop protection circuit and mechanical device. Background Technology

[0002] Nowadays, there are often live loads with safety hazards in various electrical equipment. Therefore, it is necessary to shut down the live load in an emergency when necessary to avoid endangering the lives of relevant personnel.

[0003] However, existing emergency stop switches are usually located on the main control panel of electrical equipment, which may be far away from the live load, or there may be a risk of obstruction of the view of the live load from the location of the main control panel. As a result, when the live load causes a dangerous accident, there is a safety hazard that the live load cannot be shut off in time.

[0004] Furthermore, when the emergency stop switch on the main control panel is triggered, other emergency loads in the electrical equipment are usually also shut down, making it impossible to assist relevant personnel in quickly evacuating the danger zone through the necessary emergency loads, and / or to prevent the impact of the dangerous accident from continuing to worsen. Summary of the Invention

[0005] This application provides an emergency stop protection circuit and mechanical device. The emergency stop protection circuit can solve the safety hazards of existing emergency stop circuits in the event of a dangerous accident caused by a live load, such as the inability to shut down the live load in time, and the inability to continuously supply power to the emergency load when shutting down the live load, so as to be unable to assist relevant personnel to quickly evacuate the dangerous area through the necessary emergency load, and / or to avoid the continued expansion of the losses caused by the dangerous accident.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing an emergency stop protection circuit, wherein the emergency stop protection circuit includes: a start-stop circuit, including a first button and a second button, the first button being connected to the second button and an external power supply circuit, the first button being used to receive a first power supply provided by the power supply circuit; a first switch circuit, the first switch circuit being connected to the first button, the second button and an external first load circuit, so as to receive the first power supply provided by the first button and the second button when the first button and the second button are in a first working state, and to provide the first power supply to the first load circuit, and when the first button and / or the second button are in a second working state, the first switch circuit will not provide the first power supply to the first load circuit; a control circuit, connected to the first switch circuit, the power supply circuit and the external second load circuit, so as to receive the second power supply provided by the power supply circuit, and when the first button is in a second working state, receive a switch signal sent by the first switch circuit and send a first control signal to the second load circuit.

[0007] The emergency stop protection circuit also includes a main control circuit, which is connected to the power supply circuit, the first button, the second button, the first switch circuit, and the first load circuit. The main control circuit receives the first feedback signal and the second feedback signal sent by the second button and the first switch circuit, respectively, and determines the method of sending the first main control signal to the first load circuit based on the first feedback signal and the second feedback signal.

[0008] The emergency stop protection circuit also includes a second switching circuit. The second switching circuit is connected to the first switching circuit, the main control circuit, the first load circuit, and the control circuit. The second switching circuit receives the first power supply provided by the first switching circuit or the first load circuit and the second main control signal sent by the main control circuit. Under the action of the second main control signal, it changes the conduction state to adjust the working state of the first load circuit and causes the control circuit to send a second control signal to the second load circuit.

[0009] The emergency stop protection circuit also includes an alarm switch circuit, which is connected to the power supply circuit, the first switch circuit, and the main control circuit. It receives the second power supply provided by the power supply circuit and the third main control signal sent by the main control circuit, and changes the conduction state under the action of the third main control signal to adjust the working state of the first switch circuit.

[0010] The start / stop circuit also includes a third button, which connects the power supply circuit to the main control circuit to receive the first power supply provided by the power supply circuit and provide the first power supply to the main control circuit.

[0011] The emergency stop protection circuit also includes a circuit breaker, which connects the control circuit to the power supply circuit and / or the main control circuit to the power supply circuit, so as to receive the second power supply provided by the power supply circuit and provide the second power supply to the control circuit and / or the main control circuit.

[0012] The first switching circuit includes a first contactor and a first intermediate relay. The first end of the second button is connected to the third end of the first intermediate relay and to the third end of the power supply circuit. The second end of the second button is connected to the fourth, fifth, and seventh ends of the first intermediate relay and the first end of the first contactor. The sixth end of the first intermediate relay is connected to a first load circuit. The second end of the first contactor is connected to the fourth end of the power supply circuit. The eighth end of the first intermediate relay is connected to the third end of the first button and to the first end of the power supply circuit. The ninth end of the first intermediate relay is connected to the fourth end of the first button and the first end of the first intermediate relay. The second end of the first intermediate relay is connected to the second end of the power supply circuit. The eleventh end of the first intermediate relay is connected to the power supply circuit. The first end of the circuit and the twelfth end of the first intermediate relay are connected to the third end of the main control circuit. The first button is a return button, the second button is a lock button, the first and second ends of the power circuit are used to provide the first power supply, and the third and fourth ends of the power circuit are used to provide the second power supply. The first and second ends of the first button, the first and second ends of the second button, the fifth and sixth ends of the first intermediate relay, and the eleventh and twelfth ends of the first intermediate relay are normally closed contacts. The third and fourth ends of the first button, the third and fourth ends of the first intermediate relay, the fifth and seventh ends of the first intermediate relay, and the eighth and ninth ends of the first intermediate relay are normally open contacts. The first and second ends of the first contactor and the first and second ends of the first intermediate relay are coils.

[0013] The tenth terminal of the first intermediate relay is connected to the first terminal of the main control circuit, the third terminal of the second button is connected to the first terminal of the power supply circuit, and the fourth terminal of the second button is connected to the second terminal of the main control circuit. The eighth and tenth terminals of the first intermediate relay are normally closed contacts, and the third and fourth terminals of the second button are normally open contacts.

[0014] Wherein, the third terminal of the first contactor is connected to the third terminal of the power supply circuit, the fourth terminal of the first contactor is connected to the first terminal of the control circuit, the fifth terminal of the first contactor is connected to the fourth terminal of the power supply circuit, the sixth terminal of the first contactor is connected to the second terminal of the control circuit, the third terminal of the control circuit is connected to the thirteenth terminal of the first intermediate relay, and the fourth terminal of the control circuit is connected to the fourteenth terminal of the first intermediate relay, so that when the first contactor and the first intermediate relay are triggered, the control circuit sends a first control signal to the second load circuit; wherein the third and fourth terminals of the first contactor, the fifth and sixth terminals of the first contactor, and the thirteenth and fourteenth terminals of the first intermediate relay are normally open contacts.

[0015] The first switching circuit further includes a second contactor and a thermal relay. The first end of the second contactor is connected to the sixth end of the first intermediate relay, and the second end of the second contactor is connected to the first end of the thermal relay. The second end of the thermal relay is connected to the fourth end of the power supply circuit. The first and second ends of the second contactor correspond to coils.

[0016] The first switching circuit includes a first relay and a second relay. The first end of the first button is connected to the first end of the second button, the third end of the second relay, and the third end of the first button, and is connected to the first end of the power supply circuit. The second end of the first button is connected to the first end of the first relay, and the second end of the second button is connected to the third end of the first relay. The fourth end of the second relay is connected to the fourth end of the first button and the first end of the second relay. The second end of the first relay is connected to the second end of the second relay and is connected to the second end of the power supply circuit. The fourth end of the first relay is connected to the sixth end of the second relay, and the seventh end of the second relay is connected to the first load circuit. The first button is a return button, and the second button is a lock button. The first and second ends of the power supply circuit provide a first power supply. The first and second ends of the first button, the first and second ends of the second button, and the sixth and seventh ends of the second relay are normally closed contacts. The third and fourth ends of the first button, the third and fourth ends of the first relay, and the third and fourth ends of the second relay are normally open contacts. The first and second ends of the first relay and the first and second ends of the second relay are coils.

[0017] The fifth terminal of the second relay is connected to the first terminal of the main control circuit, the third terminal of the second button is connected to the first terminal of the power supply circuit, and the fourth terminal of the second button is connected to the second terminal of the main control circuit. The third and fifth terminals of the second relay are normally closed contacts, and the third and fourth terminals of the second button are normally open contacts.

[0018] The first terminal of the control circuit is connected to the third terminal of the power supply circuit, the second terminal of the control circuit is connected to the fourth terminal of the power supply circuit, the third terminal of the control circuit is connected to the eighth terminal of the second relay, and the fourth terminal of the control circuit is connected to the ninth terminal of the second relay, so that when the second relay is triggered, the control circuit sends a first control signal to the second load circuit; wherein the third and fourth terminals of the power supply circuit are used to provide a second power supply, and the eighth and ninth terminals of the second relay are normally open contacts.

[0019] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a mechanical device, wherein the mechanical device includes: a housing, an electric door, an actuator, and a control system, the control system including an emergency stop protection circuit, the emergency stop protection circuit including a first switch circuit and a control circuit, an open accommodating cavity being formed inside the housing, the electric door being connected to the housing to close the accommodating cavity, the electric door being connected to the control circuit, and the actuator being connected to the first switch circuit; wherein the emergency stop protection circuit is the emergency stop protection circuit as described in any of the above claims.

[0020] The beneficial effects of this application are as follows: Unlike existing technologies, the emergency stop protection circuit provided in this application includes a first button and a second button. These buttons connect the first switching circuit and the power supply circuit, allowing the circuit to receive a first power supply from the power supply circuit. When the first and second buttons are in a first operating state, the first power supply is provided to the first switching circuit. When the first and / or second buttons are in a second operating state, the first power supply is not provided to the first switching circuit. Instead, the control circuit receives the second power supply from the power supply circuit. Furthermore, when the first button is in the second operating state, it receives a switching signal from the first switching circuit and sends a first control signal to the second load circuit. Specifically, the second operating state corresponds to the operating state where a safety hazard exists in the emergency stop protection circuit. The first and second buttons can be located in different installation positions, allowing for the appropriate selection of either the first or second button to perform an emergency stop on the first load circuit when a dangerous situation arises. This minimizes the risk of accidents caused by obstructed views or the distance between the hazard location and the emergency stop switch, preventing the timely shutdown of the hazard. It also ensures continuous power supply and control to the second load circuit, so as to assist relevant personnel in quickly evacuating the danger zone and / or prevent the impact of the dangerous accident from continuing to worsen. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the emergency stop protection circuit of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the second embodiment of the emergency stop protection circuit of this application;

[0024] Figure 3 yes Figure 2 A partial structural schematic diagram of an embodiment of the first switching circuit in the emergency stop protection circuit;

[0025] Figure 4 yes Figure 2 A schematic diagram of another part of the structure of the first switching circuit in an embodiment of the emergency stop protection circuit;

[0026] Figure 5 yes Figure 2 A partial structural schematic diagram of an embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit;

[0027] Figure 6 yes Figure 2 A schematic diagram of another part of the main control circuit and the second switching circuit in an embodiment of the emergency stop protection circuit;

[0028] Figure 7 yes Figure 2 A schematic diagram of the control circuit in an embodiment of an emergency stop protection circuit;

[0029] Figure 8 yes Figure 2 A schematic diagram of another embodiment of the first switching circuit in the emergency stop protection circuit;

[0030] Figure 9 yes Figure 2 A partial structural schematic diagram of another embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit;

[0031] Figure 10 yes Figure 2 A schematic diagram of another part of another embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit;

[0032] Figure 11 yes Figure 2 A schematic diagram of another embodiment of the control circuit in the emergency stop protection circuit;

[0033] Figure 12 This is a schematic diagram of the framework of one embodiment of the mechanical equipment of this application. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the emergency stop protection circuit of this application. In this embodiment, the emergency stop protection circuit 10 includes: a start / stop circuit 11, a first switching circuit 12, and a control circuit 13.

[0039] Specifically, the emergency stop protection circuit 10 provided in this application is used in electrical equipment with live loads that pose safety hazards, such as quick-drying equipment with a microwave cavity. In such cases, personnel need to transport materials to be quick-dried into the microwave cavity, potentially trapping personnel inside. The emergency stop protection circuit 10 can then promptly shut off the microwave power supply while ensuring that the corresponding electric door curtain can still be effectively driven. Of course, in other embodiments, the emergency stop protection circuit 10 can also be installed in high- and low-voltage switchgear, or in any other reasonable electrical equipment such as a prefabricated substation. This embodiment does not impose any limitations on this.

[0040] Specifically, the start / stop circuit 11 includes a first button 111 and a second button 112, and the first button 111 and the second button 112 are connected and correspondingly connected to an external power circuit 101 so as to receive the first power supply provided by the power circuit 101.

[0041] Furthermore, the first switch circuit 12 is connected to the first button 111, the second button 112, and the external first load circuit 102. When the first button 111 and the second button 112 are in the first working state, the first switch circuit 12 can receive the first power supply provided by the first button 111 and the second button 112 respectively, and trigger an action under the action of the first power supply to provide the first power supply to the first load circuit 102 to drive the first load circuit 102 into the working state. When the first button 111 and / or the second button 112 are in the second working state, the first switch circuit 12 will be triggered to turn off and will not provide the first power supply to the first load circuit 102, so that the working operation of the first load circuit 102 is quickly shut down.

[0042] It is worth noting that the first working state can specifically correspond to the on state of the first button 111 and the second button 112. The power circuit 101 is specifically connected to the first load circuit 102 through the first button 111, the second button 112 and the first switch circuit 12. When the first button 111 and the second button 112 are on, the first load circuit 102 can receive the first power output from the power circuit 101 and will be in a normal operating state. The second working state corresponds to the off state of the first button 111 and the second button 112, or the momentary off state. By turning off the first button 111 and / or the second button 112, the first switch circuit 12 can be triggered to turn off, thereby disconnecting the connection between the power circuit 101 and the first load circuit 102 and causing the first load circuit 102 to stop working. At this time, it can specifically correspond to the working state in which the first load circuit 102 will bring safety hazards.

[0043] The first button 111 and the second button 112 can be installed in different locations. For example, the first button 111 can be installed near the first load circuit 102, while the second button 112 can be located in a position that facilitates the overall control of the corresponding electrical equipment.

[0044] Understandably, by forming a dual-path emergency stop mode with the first button 111 and the second button 112, when a dangerous situation arises, relevant personnel can reasonably choose either the first button 111 or the second button 112, whichever is more convenient to operate, to urgently stop the power supply to the first load circuit 102. This can minimize the possibility of factors such as obstructed view and / or the distance between the safety hazard and the emergency stop switch. For example, if the installation position of the second button 112 is relatively far from the first load circuit 102, and / or the location of the first load circuit 102 cannot be directly observed from the installation position of the second button 112, it may be impossible to shut down the hazard source, i.e., the first load circuit 102, in time from the installation position of the second button 112, thus causing a dangerous accident.

[0045] Furthermore, the control circuit 13 is also connected to the first switch circuit 12, the power supply circuit 101, and the external second load circuit 103. It can receive the second power supply provided by the power supply circuit 101. When the first button 111 is in the second working state, that is, when a dangerous situation occurs and the first load circuit 102 is shut down by emergency stop via the first button 111, the control circuit 13 can continue to receive the switch signal sent by the first switch circuit 12 and send the first control signal to the second load circuit 103 so that the second load circuit 103 continues to maintain its working state; or, control the second load circuit 103 to perform operations that can reduce or eliminate the current safety accident.

[0046] It is worth noting that the second load circuit 103 can specifically correspond to an actuator that can assist relevant personnel in quickly evacuating from a dangerous area, such as an electric door curtain, elevator, or conveyor belt; or, if a power outage would cause the dangerous accident to continue to worsen, such as a fire extinguishing or oxygen supply device; or, if it does not affect personnel safety and is a relatively important electrical load, such as emergency lighting or industrial production equipment in a safe area.

[0047] Understandably, by ensuring continuous power supply and control to the second load circuit 103 while shutting down the first load circuit 102, the second load circuit 103 can be used to assist relevant personnel in quickly evacuating the danger zone in the early stages of a safety accident, and / or prevent the impact of the accident from worsening, and / or prevent further economic losses.

[0048] Optionally, the number of the first button 111 can be any reasonable number, such as 1, 2, 4 or 5, and it can be installed in any location where there may be a safety hazard, so that relevant personnel can touch it in time. This application does not limit this.

[0049] Optionally, the power supply circuit 101 may specifically include two independent first power supply circuits 101 and second power supply circuits 101. The first power supply circuit 101 is specifically used to provide a first power supply, and the second power supply circuit 101 is used to provide a second power supply. The first power supply may be a low-voltage DC power supply, such as any reasonable voltage level such as DC 24V, 36V or 15V, or AC 220V or 380V. The second power supply may be AC ​​220V or 380V. This application does not limit the specific voltage level.

[0050] In other embodiments, the first power supply circuit 101 and the second power supply circuit 101 can be connected by a voltage conversion circuit so that the second power supply provided by the second power supply circuit 101 can be converted into the first power supply and then provided to the emergency stop protection circuit 10. This application does not limit this.

[0051] Please see Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the emergency stop protection circuit of this application. This embodiment is based on the first embodiment of the emergency stop protection circuit provided in this application, and the emergency stop protection circuit 20 also includes a main control circuit 24.

[0052] Specifically, the main control circuit 24 is connected to the power supply circuit 101, the first button 211, the second button 212, the first switch circuit 22, and the first load circuit 102, so as to receive the first feedback signal sent by the second button 212 and the second feedback signal sent by the first switch circuit 22, and then determine the current working state of the first button 211 and the second button 212 based on the first feedback signal and the second feedback signal, so as to determine the method of sending the first main control signal to the first load circuit 102.

[0053] Understandably, the main control circuit 24 can effectively determine the current working state of the second button 212, i.e., whether the second button 212 is currently in the first working state or the second working state, by sampling the switch signal corresponding to the feedback of the second button 212. Since the working state of the first switch circuit 22 specifically corresponds to the on / off state of the first button 211, the current working state of the first button 211, i.e., whether the first button 211 is currently in the first working state or the second working state, can be effectively determined by sampling the switch signal corresponding to the feedback of the first switch circuit 22. After determining the on / off state of the first button 211 and the second button 212 respectively, it can determine whether to provide the first power output of the power supply circuit 101 to the first load circuit 102 and control the first load circuit 102 to perform corresponding operation. At the same time, it can also determine whether to send the first control signal to the second load circuit 103.

[0054] Optionally, the main control circuit 24 may specifically include any reasonable circuit unit with signal processing function, such as a PLC (Programmable Logic Controller), a microcontroller, or a MCU (Microcontroller Unit) circuit. This application does not limit this.

[0055] In one embodiment, the emergency stop protection circuit 20 further includes a second switching circuit 25, which is connected to the first switching circuit 22, the main control circuit 24, the first load circuit 102, and the control circuit 23. The second switching circuit 25 can receive the first power supply provided by the first switching circuit 22 or the first load circuit 102 and the second main control signal sent by the main control circuit 24 to the second switching circuit 25. Under the action of the second main control signal, the second switching circuit 25 changes the conduction state of each circuit inside the second switching circuit 25 to adjust the working state of the first load circuit 102. For example, when the first load circuit 102 has multiple loads, the power supply circuits of each load can be switched on and off to control each load to start in sequence or shut down simultaneously according to a set order. The main control circuit 24 can also adjust the conduction state of the second switching circuit 25 to make the control circuit 23 send a second control signal to the second load circuit 103 to start the second load circuit 103 and perform corresponding operations, or shut down or suspend the current operation.

[0056] In one embodiment, the emergency stop protection circuit 20 further includes an alarm switch circuit 26, which is connected to the power supply circuit 101, the first switch circuit 22, and the main control circuit 24. It can receive the second power supply provided by the power supply circuit 101 and the third main control signal sent by the main control circuit 24, and change the conduction state under the action of the third main control signal to adjust the working state of the first switch circuit 22.

[0057] Understandably, the main control circuit 24 controls the alarm switch circuit 26 to open and close, for example, by making the alarm switch circuit 26 open for a set time and then reset, so as to restore the working state of the first switch circuit 22 to its initial state.

[0058] In one embodiment, the start / stop circuit 21 further includes a third button 213, and the power supply circuit 101 is connected to the main control circuit 24 through the third button 213. When the third button 213 is in the on state, the main control circuit 24 can receive the first power supplied by the power supply circuit 101 through the third button 213. When the third button 213 is off, the connection between the power supply circuit 101 and the main control circuit 24 is disconnected, so that the start / stop control of the main control circuit 24 can be realized through the third button 213.

[0059] In one embodiment, the emergency stop protection circuit 20 further includes a circuit breaker 27 and / or a fuse switch (not shown) connected in series with the circuit breaker 27. The control circuit 23 is specifically connected to the power supply circuit 101 through the circuit breaker 27, and / or the main control circuit 24 is also specifically connected to the power supply circuit 101 through the circuit breaker 27. When the circuit breaker 27 receives the second power supply corresponding to the power supply circuit 101, it can provide the second power supply to the control circuit 23 and / or the main control circuit 24. Furthermore, the circuit breaker 27 can be used to control the on / off state of the control circuit 23 and / or the main control circuit 24 to achieve power on and power off.

[0060] In one embodiment, the emergency stop protection circuit 20 further includes a communication circuit (not shown in the figure). The communication circuit is connected to the main control circuit 24 and is used to connect to an external host computer, such as a back-end computer, or any reasonable smart terminal such as a smartphone or tablet computer of the back-end administrator, so as to send the working status of the main control circuit 24 and the switch signals and processed data signals it has collected to the host computer, so as to facilitate the host computer to record and analyze data.

[0061] Optionally, the communication circuit may specifically include any reasonable unit with communication function such as RS485 (a standard that defines the electrical characteristics of drivers and receivers in a balanced digital multipoint system), RS232 (an asynchronous transmission standard interface), serial communication interface, or wireless communication module, and this application does not limit it in this regard.

[0062] Please continue reading. Figures 3-6 ,in, Figure 3 yes Figure 2 A partial structural diagram of one embodiment of the first switching circuit in the emergency stop protection circuit. Figure 4 yes Figure 2 A schematic diagram of another part of the structure of the first switching circuit in an embodiment of the emergency stop protection circuit. Figure 5 yes Figure 2 A partial structural diagram of one embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit. Figure 6 yes Figure 2A schematic diagram of another part of the main control circuit and the second switching circuit in an embodiment of the emergency stop protection circuit.

[0063] In one embodiment, the first switching circuit 22 further includes a first contactor KM2 and a first intermediate relay aKA28. The first end of the second button HSB1 is connected to the third end of the first intermediate relay aKA28 and correspondingly connected to the third terminal L of the power supply circuit 101. The second end of the second button 212, i.e., the second button HSB1, is connected to the fourth, fifth, and seventh ends of the first intermediate relay aKA28 and the first end of the first contactor KM2. The sixth end of the first intermediate relay aKA28 is connected to the first load circuit 102. Figure 3 The VAL, WWPC, WFC, WSC, and WCFC symbols are shown. The second terminal of the first contactor KM2 is connected to the fourth terminal N of the power supply circuit 101. The eighth terminal of the first intermediate relay aKA28 is connected to the third terminal of the first button 211, that is, one or more of the first buttons SB1 / SB2 / SB3 / SB4 connected in series, and connected to the first terminal +24V of the power supply circuit 101. The ninth terminal of the first intermediate relay aKA28 is connected to the fourth terminal of the first button SB1 / SB2 / SB3 / SB4 and the first terminal of the first intermediate relay aKA28. The second terminal of the first intermediate relay aKA28 is connected to the second terminal 0V of the power supply circuit 101. The eleventh terminal of the first intermediate relay aKA28 is connected to the first terminal +24V of the power supply circuit 101. The twelfth terminal of the first intermediate relay aKA28 is connected to the third terminal of the main control circuit 24, such as the PLC.

[0064] Specifically, the first button SB1 / SB2 / SB3 / SB4 is a return button, while the second button HSB1 is a lock button. The first terminal +24V and the second terminal 0V of the power circuit 101 are used to provide the first power supply, and the third terminal L and the fourth terminal N of the power circuit 101 are used to provide the second power supply. The first and second terminals of the first button SB1 / SB2 / SB3 / SB4, the first and second terminals of the second button HSB1, the fifth and sixth terminals of the first intermediate relay aKA28, and the eleventh and twelfth terminals of the first intermediate relay aKA28 are normally closed contacts. The third and fourth terminals of the first button SB1 / SB2 / SB3 / SB4, the third and fourth terminals of the first intermediate relay aKA28, the fifth and seventh terminals of the first intermediate relay aKA28, and the eighth and ninth terminals of the first intermediate relay aKA28 are normally open contacts. The first and second terminals of the first contactor KM2 and the first and second terminals of the first intermediate relay aKA28 are coils.

[0065] It is worth noting that, functionally speaking, general-purpose push-button switches are used for machine control, such as starting or stopping a machine. They are usually spring-loaded, or return-type buttons, so that when the return button is pressed, the series circuit of the return button is broken, and it automatically resets after a short time interval. Emergency stop push-button switches, on the other hand, are used as a safety measure to stop a harmful load. They are usually lockable buttons, so that when pressed, they can trigger an emergency stop and require manual reset.

[0066] In the first embodiment, the first switching circuit 22 may further include a second intermediate relay aKA45, and the coil of the second intermediate relay aKA45 is connected in parallel with the coil of the first intermediate relay aKA28. That is, the coil of the second intermediate relay aKA45 will be energized and engaged synchronously with the coil of the first intermediate relay aKA28, or will be de-energized and turned off synchronously. Specifically, it can be understood as an auxiliary intermediate relay that extends the opening and closing contacts of the first intermediate relay aKA28. That is, the normally open and normally closed contacts in the second intermediate relay aKA45 are equivalent to the normally open and normally closed contacts in the first intermediate relay aKA28. Some contacts in the first intermediate relay aKA28, for example, the eleventh and twelfth terminals of the first intermediate relay aKA28, can specifically correspond to the third and fourth terminals of the second intermediate relay aKA45.

[0067] In other embodiments, the second intermediate relay aKA45 may be replaced by an auxiliary terminal (not shown in the figure) that can extend the normally open and normally closed contacts of the first intermediate relay aKA28. When there are enough normally open and normally closed contacts in the first intermediate relay aKA28, the second intermediate relay aKA45 or the auxiliary terminal may not be provided. The specific details are determined by the actual electrical control scenario, and this application does not limit this.

[0068] Furthermore, in one embodiment, the tenth terminal of the first intermediate relay aKA28 is also connected to the first terminal of the main control circuit 24. Since the opening and closing states of the contacts corresponding to the eighth and tenth terminals of the first intermediate relay aKA28 correspond to the opening and closing states of the first buttons SB1 / SB2 / SB3 / SB4, the current opening and closing states of the first buttons SB1 / SB2 / SB3 / SB4 can be fed back to the main control circuit 24. The third terminal of the second button HSB1 is also connected to the first terminal +24V of the power supply circuit 101, and the fourth terminal of the second button HSB1 is connected to the second terminal of the main control circuit 24, so that the current opening and closing state of the second button HSB1 can be fed back to the main control circuit 24.

[0069] Among them, the eighth and tenth terminals of the first intermediate relay aKA28 are normally closed contacts, and the third and fourth terminals of the second button HSB1 are normally open contacts.

[0070] Furthermore, in one embodiment, the first switching circuit 22 further includes a second contactor KM6 and a thermal relay FR3. The first end of the second contactor KM6 is connected to the sixth end of the first intermediate relay aKA28, and the second end of the second contactor KM6 is connected to the first end of the thermal relay FR3. The second end of the thermal relay FR3 is connected to the fourth end N of the power supply circuit 101.

[0071] It is understood that the opening and closing contacts in the second contactor KM6 can also be connected to the power supply circuit of the set load in the first load circuit 102, so that the set load can be started and stopped by the second contactor KM6, and the set load can also be overload protected by the thermal relay FR3.

[0072] In one embodiment, the second switching circuit 25 further includes a third intermediate relay aKA33, a fourth intermediate relay aKA34, a fifth intermediate relay aKA35, a sixth intermediate relay aKA36, a seventh intermediate relay aKA37, an eighth intermediate relay aKA38, a ninth intermediate relay aKA39, a tenth intermediate relay aKA40, an eleventh intermediate relay aKA29, a twelfth intermediate relay aKA30, a thirteenth intermediate relay aKA31, a fourteenth intermediate relay aKA46, a fifteenth intermediate relay aKA32, a sixteenth intermediate relay aKA5, a seventeenth intermediate relay aKA6, an eighteenth intermediate relay aKA8, a nineteenth intermediate relay aKA2, a twentieth intermediate relay aKA3, a twenty-first intermediate relay aKA7, a twenty-second intermediate relay aKA4, and a twenty-third intermediate relay aKA1; wherein the connection method of each intermediate relay in the second switching circuit 25 is as follows: Figures 3-6 As shown, I will not go into detail here.

[0073] Furthermore, in one embodiment, such as Figure 5 and Figure 6As shown, the main control circuit 24 can specifically be a PLC, which includes Y0-Y47, COM0-COM4, ​​and X0-X47 switch connection terminals for connecting to the corresponding switch contacts of the first switch circuit 22 and the second switch circuit 25. This enables control and detection feedback of the first switch circuit 22 and the second switch circuit 25 based on the PLC's internal program settings. Additionally, some switch connection terminals are reserved for connecting to other circuits to achieve other electrical functions. Furthermore, the PLC includes PG, L, and N power connection terminals for connecting to an external power supply. The PLC also includes 485+, 485-, and GND communication connection terminals for communicating with external circuits.

[0074] Therefore, it can be seen that the eleventh terminal of the first intermediate relay aKA28, which is also the third terminal of the second intermediate relay aKA45, can be connected to the first terminal +24V of the power supply circuit 101. The twelfth terminal of the first intermediate relay aKA28, which is also the fourth terminal of the second intermediate relay aKA45, is connected to one end of each intermediate relay coil in the second switching circuit 25. The other end of each intermediate relay coil is connected to each terminal in the main control circuit 24. When the first intermediate relay aKA28 and the second intermediate relay aKA45 are not energized, the power supply circuit 101 can provide the first power to the coils of each intermediate relay in the second switching circuit 25 through the eleventh and twelfth terminals of the first intermediate relay aKA28, which are also the third and fourth terminals of the second intermediate relay aKA45. This allows the main control circuit 24 to trigger each intermediate relay in the second switching circuit 25 to operate or turn off in sequence according to a preset setting, thereby sequentially starting or stopping each load in the first load circuit 102.

[0075] In one embodiment, the alarm switch circuit 26 may further include an alarm intermediate relay aKA17. The first terminal of the alarm intermediate relay aKA17 is connected to the first terminal +24V of the power supply circuit 101, the second terminal of the alarm intermediate relay aKA17 is connected to the main control circuit 24, the third terminal of the alarm intermediate relay aKA17 is connected to the ninth terminal of the first intermediate relay aKA28, and the fourth terminal of the alarm intermediate relay aKA17 is connected to the first terminal of the first intermediate relay aKA28. The first and second terminals of the alarm intermediate relay aKA17 correspond to coils, and the third and fourth terminals of the alarm intermediate relay aKA17 correspond to normally closed contacts.

[0076] Understandably, when the power supply circuit 101 provides a first power supply to the first switching circuit 22 through its first terminal +24V and second terminal 0V, and provides a second power supply to the first switching circuit 22 through its third terminal L and fourth terminal N, the normally open contacts of each intermediate relay in the second switching circuit 25 will close sequentially, while the coil of the first intermediate relay aKA28 will not be energized and will remain in its initial state. The second power supply will then sequentially pass through the normally closed contacts of the first buttons SB1 / SB2 / SB3 / SB4 and the second button HSB1, as well as the fifth and sixth terminals of the first intermediate relay aKA28, to supply power to the first load circuit 102; and when each of the first buttons SB1 / SB2 / SB4 / SB2 / SB3 / SB4 ... When any one of SB3 / SB4 triggers an emergency stop, that is, when the normally closed contact of the first button SB1 / SB2 / SB3 / SB4 opens and the normally open contact closes, the coil of the first intermediate relay aKA28 will be energized and attracted, triggering its normally closed contact to open and its normally open contact to close. At this time, the fifth and sixth terminals of the first intermediate relay aKA28 will also be disconnected, thereby cutting off the power supply provided by the power circuit 101 to the first load circuit 102. When the second button HSB1 triggers an emergency stop, since the second button HSB1 is a locking button, the power supply provided by the power circuit 101 to the first load circuit 102 will be directly disconnected from its first and second terminals.

[0077] Please continue reading. Figure 7 , Figure 7 yes Figure 2 A schematic diagram of an embodiment of the control circuit 23 in the emergency stop protection circuit 20.

[0078] In one embodiment, the third terminal of the first contactor KM2 is connected to the third terminal L of the power supply circuit 101, the fourth terminal of the first contactor KM2 is connected to the control circuit 23, i.e., the first terminal of the control circuit DVR1, the fifth terminal of the first contactor KM2 is connected to the fourth terminal N of the power supply circuit 101, the sixth terminal of the first contactor KM2 is connected to the second terminal of the control circuit 23, the third terminal of the control circuit 23 is connected to the thirteenth terminal of the first intermediate relay aKA28, and the fourth terminal of the control circuit 23 is connected to the fourteenth terminal of the first intermediate relay aKA28, so that when the first contactor KM2 and the first intermediate relay aKA28 are triggered, the control circuit 23 sends a first control signal to the second load circuit 103; wherein, the third and fourth terminals of the first contactor KM2, the fifth and sixth terminals of the first contactor KM2, and the thirteenth and fourteenth terminals of the first intermediate relay aKA28 are normally open contacts.

[0079] Optionally, the number of control circuits 23 can be one or more, and when the number of control circuits 23 is multiple, the multiple control circuits 23, i.e., as shown in the figure, can be one or more. Figure 7The control circuits DVR1, DVR2, ..., DVRn (n is a positive integer greater than 1) shown are connected in parallel to each other and then connected to the power supply circuit 101. This is determined by the actual control scenario, and this application does not limit it.

[0080] In one embodiment, such as Figure 7 As shown, a fuse switch 1PQS and a circuit breaker QF1 are connected in series at the front end of the first contactor KM2 to control the on / off state of each control circuit 23.

[0081] Understandably, when the power supply circuit 101 provides a first power supply to the first switching circuit 22 through its first terminal +24V and second terminal 0V, and provides a second power supply to the first switching circuit 22, the main control circuit 24, and the control circuit 23 through its third terminal L and fourth terminal N, the coil of the first contactor KM2 will be energized and attracted, triggering its normally closed contact to open and its normally open contact to close, so that the power supply circuit 101 provides a second power supply to the control circuit 23 through its first and second terminals, thereby enabling the control circuit 23 to control the second load circuit 103; and when any of the first buttons SB1 / SB2 / SB3 / SB4 triggers an emergency stop, the first intermediate... The coil of relay aKA28 will be energized and closed, triggering its normally closed contact to open and its normally open contact to close. This allows the power supply circuit 101 to continue supplying power to the coil of the first contactor KM2 by triggering the third and fourth terminals, the fifth and seventh terminals of the first intermediate relay aKA28. This, in turn, energizes the control circuit 23 to continue supplying power and controlling the second load circuit 103. When the second button HSB1 triggers the emergency stop, the coil of the first contactor KM2 will be de-energized and turned off. In other words, the power supply circuit 101 will disconnect the second power supply to the control circuit 23, so that the control circuit 23 does not supply power to the second load circuit 103.

[0082] For ease of understanding, let's take an industrial microwave device as an example of an electrical device for which the emergency stop protection circuit 20 is designed to provide emergency stop protection. It can be seen that the microwave cavity of such industrial microwave equipment is typically quite large, mainly used for drying furniture, packing boxes, tools, or grains. During normal operation, to improve production efficiency, multiple people typically operate the equipment in shifts. For instance, pulling the goods to be dried into the microwave cavity usually requires 1-2 people, with one person operating the equipment. This creates a safety hazard of the person pulling the goods being trapped inside the microwave cavity, and if such a person is trapped and not rescued in time, it could result in a life-threatening situation.

[0083] It is worth noting that this industrial microwave equipment is usually quite large, and the different shell parts that make up the microwave cavity are all modular, spliced ​​together in sections. There are usually two splicing sequences: 1. front shielding door, front buffer section, microwave section 1, microwave section 2, microwave section 3, microwave section 4, rear buffer section, rear shielding door; 2. front shielding door, front buffer section, microwave section 1, microwave section 2, microwave section 3, microwave section 4.

[0084] The buffer section is installed in conjunction with the shielding door; there will be a buffer section if there is a shielding door. The microwave section and the shielding door are spliced ​​together according to application requirements. The microwave section has a minimum of 2 segments and a maximum of 8 segments. The shielding door can be a single door.

[0085] It should be noted that the first buttons SB1 / SB2 / SB3 / SB4 in the emergency stop protection circuit 20 can be corresponding to the left and right sides of the buffer section of the front and rear doors, and / or, some or each microwave segment, of which there are at least two; the second button HSB1 can be a locking emergency stop switch installed on the control panel outside the microwave cavity; the first load circuit 102 can specifically include loads such as magnetron cooling fan, blower, wave stirrer, dehumidifier, and microwave power supply; the second load circuit 103 specifically corresponds to each shielding door, so that it can be closed or opened by the control circuit 23, that is, the door control circuit, so that the main control circuit 24 controls the operation of each load in the first load circuit 102, or allows relevant personnel inside the microwave cavity to evacuate in an emergency.

[0086] Understandably, the power supply of the main control circuit 24, the power supply input of the control circuit 23, and the power supply of the emergency stop priority main control circuit 24 can all correspond to the same AC 220V input, namely the live wire L and the neutral wire N. This type of circuit is suitable for controlling the AC 220V control voltage.

[0087] The panel emergency stop switch, also known as the second button HSB1, has two pairs of contacts: one pair is normally open HSBNO, and the other pair is normally closed HSBNC. When the emergency stop button is pressed, both pairs of contacts will activate simultaneously. The panel emergency stop switch is installed on the control cabinet panel.

[0088] The number of emergency stop switches inside the microwave cavity, namely the first buttons SB1 / SB2 / SB3 / SB4, can be four, and they are installed on the left and right sides of the buffer section of the front and rear doors, respectively, and are designated as SB1, SB2, SB3, and SB4. Each first button SB1 / SB2 / SB3 / SB4 has two pairs of contacts, one pair is normally open SB and the other pair is normally closed SBNC. When the button is pressed, the two pairs of contacts will activate simultaneously.

[0089] During normal operation:

[0090] Power-on: After power-on, the main control circuit 24 and the first switch circuit 22 are energized simultaneously, the first contactor KM2 is engaged, and the control circuit 23 is energized; after power-on, the main control circuit 24 will run according to the set program. The specific running sequence can be: 1. Close the door; 2. Start the magnetron cooling fan, blower, agitator fan, dehumidifier fan, and microwave power supply in sequence; 3. Start microwave heating; 4. After the microwave heating time is up, turn off the components in reverse order according to the above running sequence, and then open the door; repeating the cycle.

[0091] Emergency stop circuit self-test function: 1. In the first switch circuit 22, the normally closed contacts of the first buttons SB1 / SB2 / SB3 / SB4 and the second button HSB1 are connected in series with the first contactor KM2; 2. In the second switch circuit 25, the normally closed contact of the second intermediate relay aKA45 controls the power supply of each intermediate relay in the second switch circuit 25; 3. In the first switch circuit 22, the normally closed contact of the first intermediate relay aKA28 is input to X10 of the active circuit; any malfunction occurring in any of these three locations will cause the entire circuit to malfunction. The emergency stop protection circuit 20 fails to operate, thus achieving the power-on self-test feature; it also avoids the risk of personnel being trapped inside the microwave cavity due to intentional removal or vibration causing the second intermediate relay aKA45 and the first intermediate relay aKA28 to loosen or dislodge; the normally closed contacts of the second intermediate relay aKA45, the first intermediate relay aKA28, the second button HSB1, and the first buttons SB1 / SB2 / SB3 / SB4 in the circuit have both self-testing and online testing functions.

[0092] During emergency stop operation:

[0093] When the second button HSB1 is pressed: the normally closed contact HSBNC of the second button HSB1 opens, and at the same time the normally open contact HSBNO closes. The normally open contact signal is input to the main control circuit 24. When the main control circuit 24 receives the switch signal, its internal software will perform corresponding processing. In the hardware, the normally closed contact of HSB1 controls the power supply of the entire main control circuit 24. Therefore, all actuators in the first load circuit 102 will stop immediately, thus forming dual protection of software and hardware.

[0094] When the first buttons SB1 / SB2 / SB3 / SB4 and the second button HSB1 are pressed simultaneously: This is an internal emergency stop button, meaning any number of the four first buttons SB1 / SB2 / SB3 / SB4 are pressed, and the second button HSB1 is also pressed. 1. When the first buttons SB1 / SB2 / SB3 / SB4 are pressed, their normally open contact circuits activate the first intermediate relay aKA28, forming a self-locking mechanism. Simultaneously, a signal is sent to the main control circuit 24, energizing both the first intermediate relay aKA28 and the second intermediate relay aKA45. 2. At this point, the circuit for pressing the second button HSB1 is no longer effective, but the second button HSB1... B1 will still generate a switch signal to the main control circuit 24 because the first intermediate relay aKA28 is engaged. Power supply L bypasses the panel emergency stop normally closed contact and the normally open contact of KA8 controlled by the main control circuit 24 through the two normally open contacts of the first intermediate relay aKA28, and directly powers the control circuit 23 through the first contactor KM2. This ensures that the power supply to the second load circuit 103, i.e., the door opening power supply, will not fail to supply power to the control circuit 23 at critical times due to software errors in the main control circuit 24. This is the manifestation of the higher priority of the first buttons SB1 / SB2 / SB3 / SB4 than the second button HSB1. 3. When the normally closed contact of the second intermediate relay aKA45 opens, the hardware forcibly releases the clamping cylinder of the electric door in the second load circuit 103, and forcibly disconnects the door control closing signal and stop signal. This hardware-forced disconnection is to prevent the door from failing to open due to software errors in the main control circuit 24. 4. In the control circuit 23, since the first intermediate relay aKA28 forcibly supplies power to the door control, i.e., the control circuit 23, the normally open contacts of the first intermediate relay aKA28 and the second intermediate relay aKA45 close to generate an opening signal for the door control. When the door control has both power and an opening signal, the control circuit 23 will drive... The electric door opens automatically and stops automatically when it reaches the upper limit position; 5. When the main control circuit 24 receives the emergency stop signal from the first button SB1 / SB2 / SB3 / SB4, an alarm message will pop up in the center of the touch screen. After the alarm message is confirmed, it is necessary to confirm the alarm message in two different places on the touch screen before it is automatically cleared and the alarm intermediate relay aKA17 is closed for 0.5 seconds and then automatically opened. This causes the alarm intermediate relay aKA17 to close, the self-locking circuit of the first intermediate relay aKA28 to reset, and the entire emergency stop protection circuit 20 to reset and return to its initial state.

[0095] Please continue reading. Figures 8-10 ,in, Figure 8 yes Figure 2 A schematic diagram of another embodiment of the first switching circuit in the emergency stop protection circuit. Figure 9 yes Figure 2 A partial structural diagram of another embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit. Figure 10 yes Figure 2 A schematic diagram of another part of another embodiment of the main control circuit and the second switching circuit in the emergency stop protection circuit.

[0096] In one embodiment, the first switching circuit 22 further includes a first relay KA47 and a second relay KA48, and a first button 211, i.e., one or more of the first buttons SB1 / SB2 / SB3 / SB4 connected in series, with their first terminals connected to the second button 212, i.e., the first terminal of the second button HSB1, the third terminal of the second relay KA48, and the third terminals of the first buttons SB1 / SB2 / SB3 / SB4, and connected to the first terminal +24V of the power supply circuit 101. The second terminals of the first buttons SB1 / SB2 / SB3 / SB4 are connected to... The first terminal of the first relay KA47 is connected to the first terminal, the second terminal of the second button HSB1 is connected to the third terminal of the first relay KA47, the fourth terminal of the second relay KA48 is connected to the fourth terminal of the first button SB1 / SB2 / SB3 / SB4 and the first terminal of the second relay KA48, the second terminal of the first relay KA47 is connected to the second terminal of the second relay KA48 and connected to the second terminal 0V of the power supply circuit 101, the fourth terminal of the first relay KA47 is connected to the sixth terminal of the second relay KA48, and the seventh terminal of the second relay KA48 is connected to the first load circuit 102.

[0097] Specifically, the first button SB1 / SB2 / SB3 / SB4 is a return button, and the second button HSB1 is a lock button. The first terminal +24V and the second terminal 0V of the power circuit 101 are used to provide the first power supply. The first and second terminals of the first button SB1 / SB2 / SB3 / SB4, the first and second terminals of the second button HSB1, and the sixth and seventh terminals of the second relay KA48 are normally closed contacts. The third and fourth terminals of the first button SB1 / SB2 / SB3 / SB4, the third and fourth terminals of the first relay KA47, and the third and fourth terminals of the second relay KA48 are normally open contacts. The first and second terminals of the first relay KA47 and the first and second terminals of the second relay KA48 are coils.

[0098] In the first embodiment, the first switching circuit 22 may further include a third relay KA49, and the coil of the third relay KA49 is connected in parallel with the coil of the second relay KA48. That is, the coil of the third relay KA49 will be energized and engaged synchronously with the coil of the second relay KA48, or de-energized and turned off synchronously. Specifically, it can be understood as an auxiliary relay that extends the open and closed contacts of the second relay KA48. That is, the normally open and normally closed contacts in the third relay KA49 are equivalent to the normally open and normally closed contacts in the second relay KA48. Some contacts in the second relay KA48, for example, the eleventh and twelfth terminals of the second relay KA48, can specifically correspond to the third and fourth terminals of the third relay KA49.

[0099] In other embodiments, the third relay KA49 may be replaced by an auxiliary terminal block that can extend the normally open and normally closed contacts of the second relay KA48. When there are enough normally open and normally closed contacts in the second relay KA48, the third relay KA49 or the auxiliary terminal block may not be provided. The specific details are determined by the actual electrical control scenario, and this application does not limit this.

[0100] Furthermore, in one embodiment, the fifth terminal of the second relay KA48 is connected to the first terminal of the main control circuit 24. Since the opening and closing states of the fifth and sixth terminals of the second relay KA48 correspond to the opening and closing states of the first buttons SB1 / SB2 / SB3 / SB4, the current opening and closing states of the first buttons SB1 / SB2 / SB3 / SB4 can be fed back to the main control circuit 24. The third terminal of the second button HSB1 is connected to the first terminal +24V of the power supply circuit 101, and the fourth terminal of the second button HSB1 is connected to the second terminal of the main control circuit 24, so that the current opening and closing state of the second button HSB1 can be fed back to the main control circuit 24.

[0101] Among them, the third and fifth terminals of the second relay KA48 are normally closed contacts, and the third and fourth terminals of the second button HSB1 are normally open contacts.

[0102] In one embodiment, the second switching circuit 25 specifically further includes a fourth relay KA33, a fifth relay KA34, a sixth relay KA35, a seventh relay KA36, an eighth relay KA37, a ninth relay KA38, a tenth relay KA39, an eleventh relay KA40, a twelfth relay KA29, a thirteenth relay KA30, a fourteenth relay KA31, a fifteenth relay KA46, a sixteenth relay KA32, a seventeenth relay KA5, an eighteenth relay KA6, a nineteenth relay KA8, a twentieth relay KA2, a twenty-first relay KA3, a twenty-second relay KA7, a twenty-third relay KA4, and a twenty-fourth relay KA1; wherein the connection method of each relay in the second switching circuit 25 is as follows: Figures 8-10 As shown, I will not go into detail here.

[0103] Therefore, it can be seen that the eleventh terminal of the first relay KA47, which is also the third terminal of the third relay KA49, can be connected to the first terminal +24V of the power supply circuit 101. The twelfth terminal of the first relay KA47, which is also the fourth terminal of the third relay KA49, is connected to one end of each relay coil in the second switching circuit 25. The other end of each relay coil is connected to each terminal in the main control circuit 24. When the first relay KA47 and the third relay KA49 are not energized, the power supply circuit 101 can provide the first power to the coils of each relay in the second switching circuit 25 through the eleventh and twelfth terminals of the first relay KA47, which are also the third and fourth terminals of the third relay KA49. This allows the main control circuit 24 to trigger each relay in the second switching circuit 25 to operate or turn off in sequence according to the preset settings, thereby starting or stopping each load in the first load circuit 102 in sequence.

[0104] In one embodiment, the alarm switch circuit 26 may further include an alarm relay KA17. The first terminal of the alarm relay KA17 is connected to the first terminal +24V of the power supply circuit 101, the second terminal of the alarm relay KA17 is connected to the main control circuit 24, the third terminal of the alarm relay KA17 is connected to the fourth terminal of the second relay KA48, and the fourth terminal of the alarm relay KA17 is connected to the first terminal of the second relay KA48. The first and second terminals of the alarm relay KA17 correspond to coils, and the third and fourth terminals of the alarm relay KA17 correspond to normally closed contacts.

[0105] Understandably, when the power supply circuit 101 provides a first power supply to the first switching circuit 22 through its first terminal +24V and second terminal 0V, and provides a second power supply to the main control circuit 24 and the control circuit 23 through its third terminal L and fourth terminal N, the normally open contacts of each relay in the second switching circuit 25 will close sequentially. This second power supply will then sequentially power the coil of the first relay KA47 through the normally closed contacts of the first buttons SB1 / SB2 / SB3 / SB4, causing the coil of the first relay KA47 to be energized and attracted, triggering its normally closed contacts to open and its normally open contacts to close. At this time, the second power supply will sequentially power the normally closed contact of the second button HSB1, the third and fourth terminals of the first relay KA47, and the second relay... The third and fourth terminals of KA48 supply power to the first load circuit 102. When any of the first buttons SB1 / SB2 / SB3 / SB4 triggers an emergency stop, that is, the normally closed contact of the first button SB1 / SB2 / SB3 / SB4 opens and the normally open contact closes, the coil of the first relay KA47 will be de-energized and disconnected. At this time, the third and fourth terminals of the first relay KA47 will also be disconnected, thereby cutting off the power supply provided by the power circuit 101 to the first load circuit 102. When the second button HSB1 triggers an emergency stop, since the second button HSB1 is a locking button, the power supply provided by the power circuit 101 to the first load circuit 102 will be directly disconnected from its first and second terminals.

[0106] Furthermore, in one embodiment, such as Figure 9 and Figure 10 As shown, the main control circuit 24 can specifically be a PLC, which includes Y0-Y47, COM0-COM4, ​​and X0-X47 switch connection terminals for connecting to the corresponding switch contacts of the first switch circuit 22 and the second switch circuit 25. This enables control and detection feedback of the first switch circuit 22 and the second switch circuit 25 based on the PLC's internal program settings. Additionally, some switch connection terminals are reserved for connecting to other circuits to achieve other electrical functions. Furthermore, the PLC includes PG, L, and N power connection terminals for connecting to an external power supply. The PLC also includes 485+, 485-, and GND communication connection terminals for communicating with external circuits.

[0107] Please continue reading. Figure 11 , Figure 11 yes Figure 2 A schematic diagram of another embodiment of the control circuit 23 in the emergency stop protection circuit 20.

[0108] In one embodiment, the first terminal of the control circuit 23, i.e. the control circuit DVR1, is directly connected to the third terminal L of the power supply circuit 101. The second terminal of the control circuit 23 is connected to the fourth terminal N of the power supply circuit 101. The third terminal of the control circuit 23 is connected to the eighth terminal of the second relay KA48. The fourth terminal of the control circuit 23 is connected to the ninth terminal of the second relay KA48. When the second relay KA48 is triggered, the control circuit 23 can send a first control signal to the second load circuit 103.

[0109] Among them, the third terminal L and the fourth terminal N of the power supply circuit 101 are used to provide the second power supply, and the eighth terminal and the ninth terminal of the second relay KA48 are normally open contacts.

[0110] Optionally, the number of control circuits 23 can be one or more, and when the number of control circuits 23 is multiple, the multiple control circuits 23, i.e., as shown in the figure, can be one or more. Figure 7 The control circuits DVR1, DVR2, ..., DVRn (n is a positive integer greater than 1) shown are connected in parallel to each other and then connected to the power supply circuit 101. This is determined by the actual control scenario, and this application does not limit it.

[0111] In one embodiment, such as Figure 11 As shown, a fuse switch 2PQS and a circuit breaker QF2 are connected in series at the front end of each control circuit 23 to control the on / off state of each control circuit 23.

[0112] Similarly, taking the emergency stop protection circuit 20, specifically designed for industrial microwave equipment, as an example, we can see that:

[0113] 1. The gate power supply inputs in the main control circuit 24 and the control circuit 23 are both AC220V inputs, while the power supply to the first switching circuit 22 is DC24V. This type of circuit is suitable for circuits that achieve control through DC24V control voltage. The power supply to the control circuit 23 does not use a separate contactor control, meaning that the main control circuit 24 and the control circuit 23 are energized simultaneously.

[0114] 2. The panel emergency stop switch, also known as the second button HSB1, has two pairs of contacts: one pair is normally open HSBNO, and the other pair is normally closed HSBNC. When the emergency stop button is pressed, both pairs of contacts will activate simultaneously. The panel emergency stop switch is installed on the control cabinet panel.

[0115] 3. The number of emergency stop switches inside the microwave cavity, i.e., the number of first buttons SB1 / SB2 / SB3 / SB4, can be four, and they are respectively installed on the left and right sides of the buffer section of the front and rear doors, and correspond to SB1, SB2, SB3, and SB4 respectively; each first button SB1 / SB2 / SB3 / SB4 has two pairs of contacts, one pair is normally open SB and the other pair is normally closed SBNC. When the button is pressed, the two pairs of contacts will be activated simultaneously.

[0116] During normal operation:

[0117] Power-on: After power-on, the main control circuit 24 and the control circuit 23 are energized simultaneously. In the first switch circuit 22, the normally closed contacts of the cavity emergency stop switch, i.e., the first buttons SB1 / SB2 / SB3 / SB4, are connected in series to control the normally open contact of the first relay KA47 to close. The normally closed contacts of the panel emergency stop switch, i.e., the second button HSB1, and the second relay KA48, are connected in series to output the control voltage DC24V to the control circuit of the main control circuit 24. After power-on, the emergency stop protection circuit 20 runs according to the set program. The running sequence is: 1. Close the door; 2. Start the magnetron cooling fan, blower, agitator fan, dehumidifier fan, and microwave power supply in sequence; 3. Start microwave heating; 4. After the microwave heating time is up, turn off the components in reverse order according to the above running sequence, and then open the door; repeating the cycle.

[0118] Emergency stop circuit self-test function: 1. In the first switch circuit 22, the normally closed contact of the panel emergency stop switch (i.e., the second button HSB1) and the normally closed contact of the microwave cavity emergency stop switch (i.e., the first button SB1 / SB2 / SB3 / SB4), which control the normally open contact of the first relay KA47 and the normally closed contact of the second relay KA48, are connected in series in the control power output circuit, i.e., the first power supply DC24V output by the power circuit 101; 2. In the main control circuit 24, the normally closed contact of the third relay KA49 controls the relay power supply for the door closing signal and the clamping solenoid valve; these two places Any malfunction occurring anywhere will cause the entire system to malfunction; this achieves the power-on self-test feature; it also avoids the risk of people being trapped inside the microwave cavity due to intentional removal or vibration causing the first relay KA47, second relay KA48, and third relay KA49 to become loose or detached; the first relay KA47, second relay KA48, third relay KA49, the normally closed contact of the second button HSB1, and the normally closed contacts of the first buttons SB1 / SB2 / SB3 / SB4 have both self-testing and online testing functions in the circuit;

[0119] Emergency stop working status:

[0120] When the panel emergency stop switch, i.e., the second button HSB1, is pressed: the normally closed contact HSBNC of the second button HSB1 opens, and at the same time the normally open contact closes. The normally open contact signal is input to the main control circuit 24. The main control circuit 24 receives the panel emergency stop signal and performs corresponding processing in the software. In the hardware, the normally closed contact of HSB1 controls the entire control loop of the DC24V control voltage, so all actuators will stop immediately; thus forming dual protection of software and hardware.

[0121] The emergency stop switch inside the cavity and the emergency stop switch on the panel, i.e., the first button SB1 / SB2 / SB3 / SB4 and the second button HSB1, are pressed simultaneously: In the emergency stop protection circuit 20, pressing any number of the four first buttons SB1 / SB2 / SB3 / SB4 and pressing the second button HSB1; 1. When the first button SB1 / SB2 / SB3 / SB4 is pressed, the normally open contact circuit of the first button SB1 / SB2 / SB3 / SB4 activates the second relay KA48 to form a self-locking circuit, and at the same time sends a signal to the main control circuit 24, the second relay KA48 and the third relay KA49 are simultaneously energized and engaged; the second relay... When electrical relay KA48 and the third relay KA49 are engaged, the power supply circuit to other main control circuits 24 is automatically disconnected, and other actuators will immediately stop; at the same time, the solenoid valves for front and rear door clamping are disconnected, and the circuits controlling KA5 and KA6 by the second relay KA48 are activated; 2. At this time, the circuit of the second button HSB1 is invalid, but the second button HSB1 also generates a signal to the main control circuit 24 because the first relay KA47 is disconnected and the second relay KA48 is self-locking engaged. The door control is directly powered, and there is no other main control circuit 24 controlling the power supply to the door control; it will not be affected by the main control circuit 24. A software error in control circuit 24 caused a failure to supply power to the door control at a critical moment; this demonstrates the higher priority of the internal emergency stop switch over the panel emergency stop switch; 3. In the main control circuit 24, the hardware forcibly releases the door's clamping cylinder, forcibly disconnecting the door control closing signal and stop signal. This hardware forced disconnection is to prevent the door from failing to open due to a software error in the main control circuit 24; 4. In control circuit 23, because the microwave cavity emergency stop switch, i.e., the normally open contact signal of the first button SB1 / SB2 / SB3 / SB4, triggers the self-locking circuit of the second relay KA48, the second relay KA48, the third... When the normally open contact of relay KA49 closes, it sends a door-opening signal to the door control system, which automatically opens the door until it reaches the upper limit position and then automatically stops. 5. In the emergency stop protection circuit 20, as long as the main control circuit 24 receives an emergency stop signal from inside the microwave cavity, an alarm message will pop up in the center of the touch screen. After confirming the alarm message, it is necessary to confirm the alarm message in two different locations. Then, the alarm message will be automatically cleared and the alarm relay KA17 will be closed for 0.5 seconds and then automatically opened. When the alarm relay KA17 closes, the self-locking circuit of the second relay KA48 is reset. The entire emergency stop protection circuit 20 is reset and returns to its initial state.

[0122] This application also provides a mechanical device, please refer to [link / reference]. Figure 12 , Figure 12 This is a schematic diagram of a framework of one embodiment of the mechanical device of this application. In this embodiment, the mechanical device 30 includes: a housing 31, an electric door 32, an actuator 33, and a control system 34.

[0123] Specifically, the control system 34 also includes an emergency stop protection circuit 341, which further includes a first switch circuit 3411 and a control circuit 3412. An open accommodating cavity is formed inside the housing 31. An electric door 32 is connected to the housing 31 to close the accommodating cavity. The electric door 32 is connected to the control circuit 3412. The actuator 33 is connected to the first switch circuit 3411.

[0124] The emergency stop protection circuit 341 is the emergency stop protection circuit 341 as described in any of the preceding items.

[0125] Specifically, the emergency stop protection circuit 341 can be either the emergency stop protection circuit 10 or the emergency stop protection circuit 20 as described in any of the preceding items. Please refer to [link / reference needed] for details. Figures 1-11 The relevant textual content will not be repeated here.

[0126] Unlike existing technologies, the emergency stop protection circuit provided in this application includes a first button and a second button. These buttons connect a first switching circuit to a power supply circuit, allowing the circuit to receive a first power supply from the power supply circuit. When both buttons are in a first operating state, the first power supply is provided to the first switching circuit. When either the first or second button is in a second operating state, the first power supply is not provided to the first switching circuit. Instead, the control circuit receives the second power supply from the power supply circuit. When the first button is in the second operating state, it also receives a switching signal from the first switching circuit and sends a first control signal to the second load circuit. This second operating state can specifically correspond to a state where a safety hazard exists in the emergency stop protection circuit. The first and second buttons can be located in different installation positions, allowing for the appropriate selection of either the first or second button to perform an emergency stop on the first load circuit when a dangerous situation arises. This minimizes the risk of accidents caused by obstructed views or the distance between the hazard location and the emergency stop switch. It also ensures continuous power supply and control to the second load circuit, so as to assist relevant personnel in quickly evacuating the danger zone and / or prevent the impact of the dangerous accident from continuing to worsen.

[0127] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. An emergency stop protection circuit, characterized in that, The emergency stop protection circuit includes: The start / stop circuit includes a first button and a second button. The first button is connected to the second button and an external power circuit. The first button is used to receive a first power supply provided by the power circuit. A first switching circuit is connected to the first button, the second button, and an external first load circuit. When the first button and the second button are in a first working state, the first switching circuit receives the first power supply provided by the first button and the second button and supplies the first power supply to the first load circuit. When the first button and / or the second button are in a second working state, the first switching circuit will not supply the first power supply to the first load circuit. The control circuit is connected to the first switch circuit, the power supply circuit and the external second load circuit to receive the second power supply provided by the power supply circuit, and when the first button is in the second working state, it receives the switch signal sent by the first switch circuit and sends the first control signal to the second load circuit. The main control circuit is connected to the power supply circuit, the first button, the second button, the first switch circuit, and the first load circuit, to receive the first feedback signal and the second feedback signal sent by the second button and the first switch circuit respectively, and to determine the method of sending the first main control signal to the first load circuit based on the first feedback signal and the second feedback signal. The second switching circuit is connected to the first switching circuit, the main control circuit, the first load circuit, and the control circuit. The second switching circuit receives the first power supply provided by the first switching circuit or the first load circuit and the second main control signal sent by the main control circuit. Under the action of the second main control signal, the second switching circuit changes the conduction state to adjust the working state of the first load circuit and causes the control circuit to send a second control signal to the second load circuit.

2. The emergency stop protection circuit according to claim 1, characterized in that, The emergency stop protection circuit also includes an alarm switch circuit, which is connected to the power supply circuit, the first switch circuit, and the main control circuit. The alarm switch circuit receives the second power supply provided by the power supply circuit and the third main control signal sent by the main control circuit, and changes the conduction state under the action of the third main control signal to adjust the working state of the first switch circuit.

3. The emergency stop protection circuit according to claim 1, characterized in that, The start / stop circuit also includes a third button, which connects the power supply circuit to the main control circuit to receive the first power supply provided by the power supply circuit and provide the first power supply to the main control circuit.

4. The emergency stop protection circuit according to claim 1, characterized in that, The emergency stop protection circuit also includes a circuit breaker, which connects the control circuit to the power supply circuit and / or connects the main control circuit to the power supply circuit to receive the second power supply provided by the power supply circuit and provide the second power supply to the control circuit and / or the main control circuit.

5. The emergency stop protection circuit according to any one of claims 1-4, characterized in that, The first switching circuit includes a first contactor and a first intermediate relay. The first end of the second button is connected to the third end of the first intermediate relay and to the third end of the power supply circuit. The second end of the second button is connected to the fourth end, the fifth end, the seventh end of the first intermediate relay and the first end of the first contactor. The sixth end of the first intermediate relay is connected to the first load circuit. The second end of the first contactor is connected to the fourth end of the power supply circuit. The eighth terminal of the first intermediate relay is connected to the third terminal of the first button and to the first terminal of the power supply circuit. The ninth terminal of the first intermediate relay is connected to the fourth terminal of the first button and the first terminal of the first intermediate relay. The second terminal of the first intermediate relay is connected to the second terminal of the power supply circuit. The eleventh terminal of the first intermediate relay is connected to the first terminal of the power supply circuit. The twelfth terminal of the first intermediate relay is connected to the third terminal of the main control circuit. Wherein, the first button is a return button, the second button is a lock button, the first and second terminals of the power circuit are used to provide the first power, the third and fourth terminals of the power circuit are used to provide the second power, the first and second terminals of the first button, the first and second terminals of the second button, the fifth and sixth terminals of the first intermediate relay, the eleventh and twelfth terminals of the first intermediate relay are normally closed contacts, the third and fourth terminals of the first button, the third and fourth terminals of the first intermediate relay, the fifth and seventh terminals of the first intermediate relay, the eighth and ninth terminals of the first intermediate relay are normally open contacts, and the first and second terminals of the first contactor, the first and second terminals of the first intermediate relay are coils.

6. The emergency stop protection circuit according to claim 5, characterized in that, The tenth terminal of the first intermediate relay is connected to the first terminal of the main control circuit, the third terminal of the second button is connected to the first terminal of the power supply circuit, and the fourth terminal of the second button is connected to the second terminal of the main control circuit; wherein, the eighth and tenth terminals of the first intermediate relay are normally closed contacts, and the third and fourth terminals of the second button are normally open contacts.

7. The emergency stop protection circuit according to claim 5, characterized in that, The third terminal of the first contactor is connected to the third terminal of the power supply circuit, the fourth terminal of the first contactor is connected to the first terminal of the control circuit, the fifth terminal of the first contactor is connected to the fourth terminal of the power supply circuit, the sixth terminal of the first contactor is connected to the second terminal of the control circuit, the third terminal of the control circuit is connected to the thirteenth terminal of the first intermediate relay, and the fourth terminal of the control circuit is connected to the fourteenth terminal of the first intermediate relay, so that when the first contactor and the first intermediate relay are triggered, the control circuit sends the first control signal to the second load circuit; wherein, the third and fourth terminals of the first contactor, the fifth and sixth terminals of the first contactor, and the thirteenth and fourteenth terminals of the first intermediate relay are normally open contacts.

8. The emergency stop protection circuit according to claim 5, characterized in that, The first switching circuit further includes a second contactor and a thermal relay. The first end of the second contactor is connected to the sixth end of the first intermediate relay, and the second end of the second contactor is connected to the first end of the thermal relay. The second end of the thermal relay is connected to the fourth end of the power supply circuit. The first and second ends of the second contactor correspond to coils.

9. The emergency stop protection circuit according to any one of claims 1-4, characterized in that, The first switching circuit includes a first relay and a second relay. The first end of the first button is connected to the first end of the second button, the third end of the second relay, and the third end of the first button, and is connected to the first end of the power supply circuit. The second end of the first button is connected to the first end of the first relay. The second end of the second button is connected to the third end of the first relay. The fourth end of the second relay is connected to the fourth end of the first button and the first end of the second relay. The second end of the first relay is connected to the second end of the second relay and is connected to the second end of the power supply circuit. The fourth end of the first relay is connected to the sixth end of the second relay. The seventh end of the second relay is connected to the first load circuit. Wherein, the first button is a return button, the second button is a lock button, the first and second terminals of the power circuit are used to provide the first power, the first and second terminals of the first button, the first and second terminals of the second button, and the sixth and seventh terminals of the second relay are normally closed contacts, the third and fourth terminals of the first button, the third and fourth terminals of the first relay, and the third and fourth terminals of the second relay are normally open contacts, and the first and second terminals of the first relay and the first and second terminals of the second relay are coils.

10. The emergency stop protection circuit according to claim 9, characterized in that, The fifth terminal of the second relay is connected to the first terminal of the main control circuit, the third terminal of the second button is connected to the first terminal of the power supply circuit, and the fourth terminal of the second button is connected to the second terminal of the main control circuit; wherein, the third and fifth terminals of the second relay are normally closed contacts, and the third and fourth terminals of the second button are normally open contacts.

11. The emergency stop protection circuit according to claim 9, characterized in that, The first terminal of the control circuit is connected to the third terminal of the power supply circuit, the second terminal of the control circuit is connected to the fourth terminal of the power supply circuit, the third terminal of the control circuit is connected to the eighth terminal of the second relay, and the fourth terminal of the control circuit is connected to the ninth terminal of the second relay, so that when the second relay is triggered, the control circuit sends the first control signal to the second load circuit; wherein, the third and fourth terminals of the power supply circuit are used to provide the second power supply, and the eighth and ninth terminals of the second relay are normally open contacts.

12. A mechanical device, characterized in that, The mechanical equipment includes: a housing, an electric door, an actuator, and a control system. The control system includes an emergency stop protection circuit, which includes a first switch circuit and a control circuit. An open accommodating cavity is formed inside the housing. The electric door is connected to the housing to close the accommodating cavity. The electric door is connected to the control circuit. The actuator is connected to the first switch circuit. The emergency stop protection circuit is the emergency stop protection circuit as described in any one of claims 1-11.

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