Equipment emergency stop system and mechanical equipment

Abstract

The invention discloses an equipment emergency stop system and mechanical equipment, and belongs to the technical field of safety control. In the application, a signal reset end of a safety relay is connected in series with a normally closed auxiliary contact of a contactor; a main contact of the contactor is arranged on a power supply loop of an equipment load; a signal output end of the safety relay is connected in series with a normally open contact of the relay and then is connected with a coil of the contactor; one end of the state detection switch is connected with a power supply anode, and the other end is connected with a power supply cathode after being connected with a coil of the relay in series; and the state detection switch is used for being switched off when an abnormal state is monitored in the equipment and switched on when the abnormal state is not monitored. When the equipment is in an abnormal state, even if a worker fails to stop the operation of the equipment through the emergency stop button in time, the equipment can be automatically and rapidly stopped through the state detection switch and the relay, so that the operation safety of the equipment is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of safety control technology, and in particular to an equipment emergency stop system and mechanical equipment. Background Art

[0002] In modern industrial production, safety control technology and emergency stop devices are important means to ensure personal and equipment safety. Especially in some high-speed mechanical equipment, such as various production line equipment, processing equipment, refrigeration equipment, etc., once an abnormal situation occurs, it is necessary to be able to quickly and effectively stop the equipment from running to avoid greater losses.

[0003] In order to improve the safety of mechanical equipment, an emergency stop button is usually set on the mechanical equipment so that when the staff encounters abnormal conditions such as damage or danger of the mechanical equipment, they can quickly cut off the power supply of the mechanical equipment through the emergency stop button to make the mechanical equipment stop urgently. However, in the process of realizing the present invention, the inventor found that the prior art has at least the following problems: when the mechanical equipment is in an abnormal state, if the staff is not next to the equipment, it will be difficult to stop the operation of the mechanical equipment in time through the emergency stop button, and the mechanical equipment cannot be protected in time, which reduces the operating safety of the equipment. Summary of the invention

[0004] The embodiments of the present application provide an equipment emergency stop system and mechanical equipment, which can automatically and quickly stop the equipment in an emergency when the equipment is in an abnormal state, thereby improving the operating safety of the equipment.

[0005] The embodiment of the present application provides an equipment emergency stop system, characterized in that it includes: a safety relay, a contactor, a state detection switch and a relay;

[0006] The first power input terminal of the safety relay is connected to the positive electrode of the power supply, and the second power input terminal of the safety relay is connected to the negative electrode of the power supply;

[0007] The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the contactor; the main contact of the contactor is arranged on the power supply circuit of the equipment load;

[0008] The signal output terminal of the safety relay is connected in series with the normally open contact of the relay and then connected to the coil of the contactor;

[0009] One end of the status detection switch is connected to the positive pole of the power supply, and the other end of the status detection switch is connected in series with the coil of the relay and then connected to the negative pole of the power supply; the status detection switch is used to disconnect when an abnormal status is detected in the device, and close when no abnormal status is detected.

[0010] Further, the state detection switch includes: a plurality of state detection switches; the relay includes: a plurality of relays corresponding to the plurality of state detection switches;

[0011] The signal output end of the safety relay is connected in series with the normally open contacts of the plurality of relays and then connected to the coil of the contactor;

[0012] One end of each state detection switch is connected to the positive electrode of the power supply, and the other end is connected in series with the coil of the corresponding relay and then connected to the negative electrode of the power supply.

[0013] Furthermore, the state detection switch includes: any one of a temperature switch, a pressure switch, a humidity switch, a current switch and a voltage switch.

[0014] Further, the contactor includes: a first contactor and a second contactor;

[0015] The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the first contactor and the normally closed auxiliary contact of the second contactor;

[0016] The main contact of the first contactor and the main contact of the second contactor are connected in series to the power supply circuit of the equipment load;

[0017] The signal output end of the safety relay is connected in series with the normally open contact of the relay, and then connected to the coil of the first contactor and the coil of the second contactor.

[0018] Furthermore, the signal output end of the safety relay is connected in series with the normally open contact of the relay, and then connected to the coil of the first contactor and the coil of the second contactor which are connected in parallel.

[0019] Further, the signal output end of the safety relay includes: a first signal output end and a second signal output end, and the normally open contact of the relay includes: a first normally open contact and a second normally open contact;

[0020] The first signal output terminal of the safety relay is connected in series with the first normally open contact of the relay and then connected to the coil of the first contactor;

[0021] The second signal output terminal of the safety relay is connected in series with the second normally open contact of the relay and then connected to the coil of the second contactor.

[0022] Furthermore, it also includes a first emergency stop button and a second emergency stop button, wherein the first emergency stop button is installed at the front end of the equipment unit, and the second emergency stop button is installed at the rear end of the equipment unit;

[0023] The signal monitoring channel of the safety relay includes a first signal monitoring channel and a second signal monitoring channel;

[0024] The normally closed contact of the first emergency stop button is arranged in the first signal monitoring channel, and the normally closed contact of the second emergency stop button is arranged in the second signal monitoring channel.

[0025] Further, it also includes: a reset button with light;

[0026] The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the contactor and the reset button with light;

[0027] The second signal output terminal of the safety relay is connected to the indicator light corresponding to the reset button with light.

[0028] Furthermore, it also includes: a controller;

[0029] The controller is connected to the third signal output terminal of the safety relay, and the controller is connected to the second normally open contact of the relay.

[0030] An embodiment of the present application also provides a mechanical device, which uses the above-mentioned equipment emergency stop system to perform emergency stop on the mechanical device.

[0031] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0032] In an embodiment of the present application, the signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the contactor, the main contact of the contactor is arranged on the power supply circuit of the equipment load, the signal output terminal of the safety relay is connected in series with the normally open contact of the relay, and then connected to the coil of the contactor, one end of the status detection switch is connected to the positive pole of the power supply, and the other end of the status detection switch is connected in series with the coil of the relay and then connected to the negative pole of the power supply.

[0033] It can be seen that when the status detection switch does not detect an abnormal state, the status detection switch is closed. At this time, the coil of the relay is energized and the normally open contact of the relay is closed. When the signal output end of the safety relay outputs a signal normally, the coil of the contactor is energized, the main contacts of the contactor are closed, and the power supply circuit of the equipment load is connected to supply power to the load; at this time, when the status detection switch detects that there is an abnormal state in the equipment, the status detection switch is disconnected. At this time, the coil of the relay loses power, the normally open contact of the relay returns to the disconnected state, the coil of the contactor loses power, the main contacts of the contactor are disconnected, the power supply circuit of the equipment load is disconnected, and the power supply to the load is stopped, so that the equipment is stopped in an emergency; that is, when the equipment is in an abnormal state, even if the staff fails to stop the operation of the equipment in time through the emergency stop button, the equipment can be automatically and quickly stopped in an emergency through the status detection switch and the relay, thereby improving the operation safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0035] Figure 1 A circuit schematic diagram of an equipment emergency stop system disclosed in an embodiment of the present application;

[0036] Figure 2 This is a circuit schematic diagram of another equipment emergency stop system disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the description of the embodiments of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In the existing process, when the mechanical equipment is in an abnormal state (such as over-temperature or over-pressure, etc.), the staff can use the emergency stop button to cut off the power supply of the mechanical equipment in time to make the equipment stop; however, when the mechanical equipment is in an abnormal state, if the staff is not next to the equipment, it will be difficult to stop the operation of the mechanical equipment in time through the emergency stop button, and the mechanical equipment cannot be protected in time, which reduces the operation safety of the equipment. Therefore, the embodiment of the present application provides an equipment emergency stop system, which can quickly stop the equipment in an abnormal state, improve the operation safety of the equipment, and the circuit schematic diagram of the equipment emergency stop system is shown in the figure. Figure 1 As shown, the following will be based on Figure 1 Describe the equipment emergency stop system:

[0041] In an embodiment of the present application, the equipment emergency stop system includes: a safety relay SR, an emergency stop button EMO, a contactor KM, a status detection switch ST and a relay KA; the safety relay SR includes a power input terminal (A1 and A2), a signal monitoring terminal (S52, S11, S12, S21 and S22), a signal reset terminal S34, a signal input terminal (13, 23, 33 and 41), and a signal output terminal (14, 24, 34, and 42); wherein, the power supply connected to the equipment emergency stop system can be 24Vdc (24V direct current), the first power input terminal A1 of the safety relay SR is connected to the positive pole of the power supply, and the second power input terminal A2 of the safety relay is connected to the negative pole of the power supply; the signal monitoring terminals S11 and S12 are a group of signal monitoring channels, the signal monitoring terminals S21 and S22 are another group of signal monitoring channels, and the normally closed contacts of the emergency stop button EMO are arranged in the signal monitoring channel of the safety relay SR.

[0042] Among them, the contactor KM includes: a main contact, a normally closed auxiliary contact (shown in 21 and 22 in the figure) and a coil (shown in A1 and A2 in the figure). The signal reset terminal S34 of the safety relay is connected in series with the normally closed auxiliary contact of the contactor KM; the main contact of the contactor KM is arranged on the power supply circuit of the equipment load, and the power supply circuit of the equipment load can be powered by three-phase 380V AC power to supply power to the load. The three-phase 380V AC power can be converted into 24V DC power by a converter to provide power for the equipment emergency stop system. The coil of the contactor KM uses a 24V DC coil to match the power supply of the equipment emergency stop system. The main contacts of the contactor KM are normally open contacts, that is, when the coil of the contactor KM is energized, the main contacts of the contactor KM are closed, the power supply circuit of the equipment load is connected, the equipment load is energized and operates normally, and the normally closed auxiliary contacts of the contactor KM are disconnected; when the coil of the contactor KM loses power, the recovery contact of the contactor KM is disconnected, the power supply circuit of the equipment load is disconnected, so that the equipment stops urgently, and the normally closed auxiliary contacts of the contactor KM are restored and closed.

[0043] The signal input terminal (13 and 23) of the safety relay SR can be connected to the positive pole of the power supply, and the signal output terminal 14 of the safety relay SR is connected in series with the normally open contacts (5 and 9) of the relay KA, and then connected to the coil of the contactor KM. That is, the start signal of the contactor KM is connected in series with the normally open contacts of the relay KA. Among them, the working process of the safety relay SR is as follows: when the power input terminal (A1 and A2) of the safety relay SR is energized, the safety relay can detect the closed state of the two signal monitoring channels (S11 and S12, S21 and S22), that is, the two normally closed contacts of the emergency stop button EMO are in a closed state, and the safety relay SR has the starting conditions; when the normally closed auxiliary contact of the contactor KM is in a closed state, the safety relay SR starts; the signal input terminal and the signal output terminal of the safety relay SR are turned on, that is, 13 and 14 are closed, 23 and 24 are closed, 33 and 34 are closed, and the signal output terminal of the safety relay SR outputs a signal. When mechanical equipment is in an abnormal state and needs emergency shutdown, just press the emergency stop button EMO to trigger the safety relay SR to close the output.

[0044] One end of the state detection switch ST is connected to the positive pole of the power supply, and the other end of the state detection switch ST is connected in series with the coil of the relay KA and then connected to the negative pole of the power supply, that is, the state detection switch ST is connected in series with the start signal of the relay KA; the state detection switch ST is used to disconnect when an abnormal state is detected in the device, and close when no abnormal state is detected. That is, the state detection switch can detect the state of the device and disconnect or close based on the state of the device. The state detection switch can be any one of a temperature switch, a pressure switch, a humidity switch, a current switch, and a voltage switch, and the specifics are not limited here. Corresponding state detection switches can be used based on different devices, and the state detection switch is set at the corresponding detection position of the device. For example, for a refrigeration device, the state detection switch can use a normally closed temperature switch, and the normally closed temperature switch is set on the compressor of the refrigeration device. When it is detected that the temperature of the compressor reaches the abnormal temperature threshold, the normally closed temperature switch is disconnected, or the state detection switch can use a normally closed pressure switch, and the normally closed pressure switch is set in the liquid storage tank of the refrigeration device. When it is detected that the pressure in the liquid storage tank reaches the abnormal pressure threshold, the normally closed pressure switch is disconnected.

[0045] When the equipment is in an abnormal state, the relay KA can be triggered to cut off the coil power supply of the contactor KM according to the disconnected state of the state detection switch ST, so that the main contact of the contactor KM disconnects the power supply circuit and the equipment stops urgently; specifically, when the state detection switch ST does not detect the abnormal state, the state detection switch ST is closed, at this time, the coil of the relay KA is energized, and the normally open contact of the relay KA is closed. When the signal output end of the safety relay SR outputs normally, the coil of the contactor KM is energized, the main contact of the contactor KM is closed, and the power supply circuit of the equipment load is turned on to supply power to the load; at this time, when the state detection switch ST detects that there is an abnormal state in the equipment, the state detection switch ST is disconnected, at this time, the coil of the relay KA loses power, the normally open contact of the relay KA returns to the disconnected state, the coil of the contactor KM loses power, the main contact of the contactor KM is disconnected, the power supply circuit of the equipment load is disconnected, and the power supply to the load is stopped, so that the equipment stops urgently; that is, when the equipment is in an abnormal state, even if the staff fails to stop the operation of the equipment in time through the emergency stop button, the equipment can be automatically and quickly stopped by the state detection switch and the relay, thereby improving the operation safety of the equipment.

[0046] The following will be combined Figure 2 Describe the equipment emergency stop system in this application:

[0047] Furthermore, in the embodiment of the present application, multiple state detection switches and corresponding multiple relays can be used to detect multiple states of the equipment. When an abnormality is detected in any state, the state detection switch is disconnected, the coil of the corresponding relay is de-energized, and the normally open contacts of the relay are restored to be disconnected, so that the coil of the contactor is de-energized, the main contacts of the contactor are disconnected, and the equipment is stopped urgently.

[0048] Specifically, the state detection switch includes: multiple state detection switches; the relay includes: multiple relays corresponding to the multiple state detection switches; the signal output end of the safety relay is connected in series with the normally open contacts of the multiple relays and then connected to the coil of the contactor; one end of each state detection switch is connected to the positive pole of the power supply, and the other end is connected in series with the coil of the corresponding relay and then connected to the negative pole of the power supply. The state detection switch includes: a normally closed temperature switch H1-ST and a normally closed pressure switch HPS-ST, and the relay includes: a first relay KA1 corresponding to the normally closed temperature switch H1-ST, and a second relay KA2 corresponding to the normally closed pressure switch HPS-ST, wherein the signal output end 13 of the safety relay SR is connected in series with the normally open contacts of the first relay KA1 and the second relay KA2 and then connected to the coil of the contactor; one end of the normally closed temperature switch H1-ST is connected to the positive pole of the power supply, and the other end is connected in series with the coil of the first relay KA1 and then connected to the negative pole of the power supply; one end of the normally closed pressure switch HPS-ST is connected to the positive pole of the power supply, and the other end is connected in series with the coil of the second relay KA2 and then connected to the negative pole of the power supply. When the normally closed temperature switch H1-ST detects abnormal temperature, the normally closed temperature switch H1-ST is disconnected, or when the normally closed pressure switch HPS-ST detects abnormal pressure, the normally closed pressure switch HPS-ST is disconnected, the corresponding relay coil loses power, and the normally open contacts of the relay resume disconnection, that is, the contactor coil loses power, the main contacts of the contactor resume disconnection, and the equipment stops suddenly.

[0049] Furthermore, since the contacts of the contactor may become stuck after long-term use, it is impossible to effectively disconnect when the power needs to be turned off, which easily increases the operating risk of the equipment. Therefore, in the embodiment of the present application, the contactor includes: a first contactor KM1 and a second contactor KM2; the signal reset terminal S34 of the safety relay SR is connected in series with the normally closed auxiliary contact of the first contactor KM1 and the normally closed auxiliary contact of the second contactor KM2; the main contact of the first contactor KM1 and the main contact of the second contactor KM2 are connected in series to the power supply circuit of the equipment load; the signal output terminal of the safety relay SR is connected in series with the normally open contact of the relay, and then connected to the coil of the first contactor KM1 and the coil of the second contactor KM2.

[0050] The main contacts of the first contactor KM1 and the main contacts of the second contactor KM2 are connected in series to the power supply circuit of the equipment load, so that when the coils of the two contactors lose power, even if the main contacts of one contactor are stuck, the main contacts of the other contactor can still work normally, disconnecting the power supply circuit of the equipment load and causing the equipment to stop urgently, ensuring the reliable cutting off of the power supply circuit and reducing the risk of equipment operation.

[0051] Furthermore, the coils of the two contactors can be in parallel, and only one normally open contact of the relay is needed to synchronously control the power on or off of the coils of the two contactors; that is, the signal output end of the safety relay SR is connected in series with the normally open contact of the relay, and then connected to the coils of the first contactor KM1 and the second contactor KM2 in parallel. When the coil of the relay loses power, the normally open contact of the relay resumes disconnection. At this time, even if the safety relay SR outputs a signal, the coils of the first contactor KM1 and the second contactor KM2 will lose power at the same time, the main contacts of the first contactor KM1 and the second contactor KM2 will be disconnected, and the equipment will stop suddenly.

[0052] Furthermore, the coils of the two contactors may not be in a parallel state, and the two normally open contacts of the relay are used to synchronously control the power on or off of the coils of the two contactors; specifically, the signal output end of the safety relay SR includes: a first signal output end and a second signal output end, and the normally open contacts of the relay include: a first normally open contact and a second normally open contact; the first signal output end of the safety relay is connected in series with the first normally open contact of the relay, and then connected to the coil of the first contactor KM1; the second signal output end of the safety relay is connected in series with the second normally open contact of the relay, and then connected to the coil of the second contactor KM1. When the coil of the relay loses power, the first normally open contact and the second normally open contact of the relay are both restored to disconnection. At this time, even if the safety relay SR outputs a signal, the coil of the first contactor KM1 and the coil of the second contactor KM2 will lose power at the same time, the main contact of the first contactor KM1 and the main contact of the second contactor KM2 will be disconnected, and the equipment will stop suddenly.

[0053] Furthermore, the existing emergency stop system usually has only one signal transmission path. If this signal transmission path fails, the emergency stop signal cannot be issued in time, which increases the operation risk of the equipment; and the existing emergency stop system can usually only be operated at the front end of the equipment. For the operators at the back end of the equipment, when the equipment encounters an abnormal state, it may not be possible to issue an emergency stop signal in time, which also increases the operation risk of the equipment.

[0054] Therefore, in the embodiment of the present application, the emergency stop button includes a first emergency stop button EMO1 and a second emergency stop button EMO2, the first emergency stop button EMO1 is installed at the front end of the equipment unit, and the second emergency stop button EMO2 is installed at the rear end of the equipment unit, so that the staff at the front end or the rear end of the equipment can quickly send out an emergency stop signal when the equipment is in an abnormal state, further improving the operation safety of the equipment. Among them, the signal monitoring channel of the safety relay includes a first signal monitoring channel (a channel formed by S11 and S12) and a second signal monitoring channel (a channel formed by S21 and S22); the normally closed contact of the first emergency stop button EMO1 is set in the first signal monitoring channel, and the normally closed contact of the second emergency stop button EMO2 is set in the second signal monitoring channel. When any emergency stop button is pressed, the signal will be transmitted to the safety relay SR, which will disconnect the main contacts of the two contactors (that is, the safety relay SR turns off the output, the coils of the two contactors lose power, and the main contacts of the two contactors resume disconnection), realizing dual-path signal transmission and processing, and solving the problem that the existing emergency stop system has only one signal transmission path. If the signal transmission path fails, the emergency stop signal cannot be issued in time, increasing the risk of equipment operation.

[0055] Furthermore, in an embodiment of the present application, the equipment emergency stop system also includes: a reset button START with light; the signal reset terminal S34 of the safety relay SR is connected in series with the normally closed auxiliary contact of the contactor and the reset button START with light; the second signal output terminal 24 of the safety relay SR is connected to the indicator light START-HL corresponding to the reset button with light.

[0056] Among them, the reset button START with light can be a button without self-locking function; when the power input terminal (A1 and A2) of the safety relay SR is energized, the safety relay SR detects whether the normally closed contacts of the emergency stop switches EMO1 and EMO2 in the two signal monitoring channels are in a closed state. If so, the reset button START with light can be pressed, and the normally closed contacts of the contactors KM1 and KM2 are in a closed state. The contacts of the reset button START with light are connected once, the safety relay SR starts, and the signal output terminal of the safety relay outputs a signal; the indicator light START-HL corresponding to the reset button with light lights up, indicating that the power supply circuit of the equipment is normal. At this time, if the equipment is in an abnormal state, when the abnormal fault of the equipment is eliminated, not only the emergency stop button is restored, but also the reset button with light is needed to reset it to restore the fault to eliminate the abnormality; the reset button with light can protect the emergency stop state, the fault has not been eliminated, and the risk of misoperation of emergency stop reset is brought about.

[0057] Furthermore, the equipment emergency stop system may also include a controller PLC, which can monitor the operating status of the devices in the equipment emergency stop system and control the operation process of the equipment. Specifically, the controller PLC is connected to the third signal output terminal 34 of the safety relay SR. When the safety relay SR is started, the third signal output terminal 34 of the safety relay SR can output a signal to the controller PLC. When the safety relay SR stops, the third signal output terminal 34 of the safety relay SR does not output a signal to the controller PLC, that is, the controller PLC can monitor the operating status of the safety relay SR. The controller PLC is connected to the second normally open contact of the relay, that is, a group of normally open contacts of the relay is connected in series with the coil of the contactor, and another group of normally open contacts is connected to the monitoring port of the controller PLC. When the coil of the relay is energized, the other group of normally open contacts of the relay is also closed. When the coil of the relay is de-energized, the other group of normally open contacts of the relay is also disconnected; that is, the controller PLC can monitor the operating status of the relay to monitor the switch state of the state detection switch, determine the energized state of the coil of the contactor, and determine whether the equipment is in an emergency stop state. When the controller PLC monitors that the safety relay SR closes its output, or the normally open contact of the relay is disconnected, it determines that the contactor coil is de-energized, that is, the equipment is in an emergency stop state, and the controller PLC synchronously closes all loads and valves of the equipment to better protect the equipment.

[0058] The embodiment of the present application also provides a mechanical device, which uses the above-mentioned equipment emergency stop system to perform emergency stop on the mechanical device. The mechanical device is a mechanical device that may have abnormal conditions (such as abnormal temperature, abnormal pressure, or abnormal current, etc.) during operation, including: refrigeration devices, CNC machine tools, heating devices, etc., which are not specifically limited here.

[0059] In the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0060] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and description of the embodiments of the present application.

Claims

1. An equipment emergency stop system, characterized in that: include: Safety relays, contactors, status detection switches and relays; The first power input terminal of the safety relay is connected to the positive electrode of the power supply, and the second power input terminal of the safety relay is connected to the negative electrode of the power supply; The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the contactor; the main contact of the contactor is arranged on the power supply circuit of the equipment load; The signal output terminal of the safety relay is connected in series with the normally open contact of the relay and then connected to the coil of the contactor; One end of the status detection switch is connected to the positive pole of the power supply, and the other end of the status detection switch is connected in series with the coil of the relay and then connected to the negative pole of the power supply; the status detection switch is used to disconnect when an abnormal state is detected in the device, and close when no abnormal state is detected.

2. The equipment emergency stop system according to claim 1, characterized in that: The state detection switch includes: a plurality of state detection switches; the relay includes: a plurality of relays corresponding to the plurality of state detection switches; The signal output end of the safety relay is connected in series with the normally open contacts of the plurality of relays and then connected to the coil of the contactor; One end of each state detection switch is connected to the positive electrode of the power supply, and the other end is connected in series with the coil of the corresponding relay and then connected to the negative electrode of the power supply.

3. The equipment emergency stop system according to claim 1 or 2, characterized in that: The state detection switch includes any one of a temperature switch, a pressure switch, a humidity switch, a current switch and a voltage switch.

4. The equipment emergency stop system according to claim 1, characterized in that: The contactor comprises: a first contactor and a second contactor; The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the first contactor and the normally closed auxiliary contact of the second contactor; The main contact of the first contactor and the main contact of the second contactor are connected in series to the power supply circuit of the equipment load; The signal output end of the safety relay is connected in series with the normally open contact of the relay, and then connected to the coil of the first contactor and the coil of the second contactor.

5. The equipment emergency stop system according to claim 4, characterized in that: The signal output end of the safety relay is connected in series with the normally open contact of the relay, and then connected to the coil of the first contactor and the coil of the second contactor which are connected in parallel.

6. The equipment emergency stop system according to claim 4, characterized in that: The signal output end of the safety relay includes: a first signal output end and a second signal output end, and the normally open contact of the relay includes: a first normally open contact and a second normally open contact; The first signal output terminal of the safety relay is connected in series with the first normally open contact of the relay and then connected to the coil of the first contactor; The second signal output terminal of the safety relay is connected in series with the second normally open contact of the relay and then connected to the coil of the second contactor.

7. The equipment emergency stop system according to claim 1, characterized in that: It also includes a first emergency stop button and a second emergency stop button, wherein the first emergency stop button is installed at the front end of the equipment unit, and the second emergency stop button is installed at the rear end of the equipment unit; The signal monitoring channel of the safety relay includes a first signal monitoring channel and a second signal monitoring channel; The normally closed contact of the first emergency stop button is arranged in the first signal monitoring channel, and the normally closed contact of the second emergency stop button is arranged in the second signal monitoring channel.

8. The equipment emergency stop system according to claim 1, characterized in that: Also includes: Illuminated reset button; The signal reset terminal of the safety relay is connected in series with the normally closed auxiliary contact of the contactor and the reset button with light; The second signal output terminal of the safety relay is connected to the indicator light corresponding to the reset button with light.

9. The equipment emergency stop system according to claim 1, characterized in that: Also includes: Controller; The controller is connected to the third signal output terminal of the safety relay, and the controller is connected to the second normally open contact of the relay.

10. A mechanical device, characterized in that: The mechanical equipment is urgently stopped by using the equipment emergency stop system described in any one of claims 1 to 9.

Images