Start-stop control circuit

Abstract

The embodiment of the utility model discloses a start-stop control circuit. The start-stop control circuit comprises a main power supply module and a start-stop module, and the start-stop module comprises a detection element, a first relay and a first switch. According to the embodiment of the utility model, the main power supply module is used for providing electric energy for the working equipment and the standby equipment, the detection element is used for detecting the preset parameter items of all the equipment in real time, and when the value of the preset parameter item detected by the detection element is lower than a set parameter value, the first relay is electrified, so that the first switch is electrified and closed; and finally starting at least one standby device. Compared with the prior art, when the working equipment breaks down, the standby equipment can be started in time, manual on-site starting is not needed, influence on production is avoided, and enterprise loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen generator control, in particular to a start-stop control circuit. Background Art

[0002] A nitrogen generator is a device that uses air as a raw material and separates oxygen and nitrogen therein by physical methods to obtain nitrogen.

[0003] Currently, nitrogen is required in the production process of many products. At this time, the stable operation of the nitrogen generator is particularly important. Generally, manufacturers will place multiple nitrogen generators in the workshop for use. When the gas consumption in the workshop is large, all nitrogen generators will run. At this time, if there is a circuit failure, it may cause all nitrogen generators to stop running, with a wide range of influence and great losses to the enterprise. When the gas consumption in the workshop is small, some nitrogen generators can be shut down for standby. However, if a nitrogen generator in operation fails, employees need to go to the site to manually start the standby nitrogen generator, and by then, the losses of the enterprise have already occurred.

[0004] Therefore, there is an urgent need for a technology that can solve at least one of the above problems. Content of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a start-stop control circuit to solve the problem that the standby nitrogen generator cannot be started in time in the prior art.

[0006] The utility model provides a start-stop control circuit, including:

[0007] A main power supply module, which is configured to be electrically connected to at least one working device and at least one standby device;

[0008] A start-stop module, which includes a detection element, a first relay, and a first switch. The detection element is used to detect preset parameter items of all devices. The first switch is electrically connected to the detection element through the first relay, and the first switch is electrically connected to at least one of the standby devices;

[0009] Wherein, when the detection element detects that the value of the preset parameter item is lower than the set parameter value, the start-stop module starts at least one of the standby devices through the first switch.

[0010] Based on the start-stop control circuit described in the embodiment, the main power supply module provides electrical energy for the working equipment and the standby equipment, and the detection element is used to detect all preset parameter items of the equipment in real time. When the value of the preset parameter item detected by the detection element is lower than the set parameter value, the first relay is energized, so that the first switch is energized and closed, and finally at least one standby equipment is started. Compared with the prior art, the utility model can start the standby equipment in time when the working equipment fails, without manual on-site activation, avoiding affecting production and thus avoiding losses to the enterprise.

[0011] In an embodiment of the above start-stop control circuit, the start-stop module further includes a second switch, and the second switch is used to cut off the connection between the standby equipment and the main power supply module.

[0012] In an embodiment of the above start-stop control circuit, the start-stop module further includes an alarm controller and an alarm notification unit, and the alarm controller is electrically connected to the detection element;

[0013] Wherein, the alarm notification unit includes an alarm, the alarm is electrically connected to the first relay, and when the detection element detects that the value of the preset parameter item is lower than the set parameter value, the alarm controller starts the alarm through the first relay.

[0014] In an embodiment of the above start-stop control circuit, the start-stop module further includes a second relay, the energization control end of the second relay is electrically connected to the energization control end of the first relay, and the first switch is electrically connected to the detection element through the second relay.

[0015] In an embodiment of the above start-stop control circuit, both the working equipment and the standby equipment are nitrogen generators.

[0016] In an embodiment of the above start-stop control circuit, the start-stop control circuit further includes an analysis module, the analysis module is electrically connected to the main power supply module through a switching power supply module, the analysis module includes a nitrogen pressure recorder, an electronic pressure gauge and a display screen, the nitrogen pressure recorder is electrically connected to the main power supply module, the electronic pressure gauge and the display screen are respectively electrically connected to the switching power supply module, and the signal output ends of the electronic pressure gauge and the display screen are respectively electrically connected to the nitrogen pressure recorder.

[0017] In an embodiment of the above start-stop control circuit, the switching power supply module is electrically connected to the main power supply module through a third switch;

[0018] and / or

[0019] The start-stop module is electrically connected to the main power supply module through the switching power supply module.

[0020] In an embodiment of the above start-stop control circuit, the main power supply module is electrically connected to a pressure regulating valve, and the pressure regulating valve is used to adjust the output air pressure of the working device and / or the standby device.

[0021] In an embodiment of the above start-stop control circuit, the start-stop control circuit further includes a standby power supply module and a power supply switching module, and the start-stop module is electrically connected to the main power supply module or the standby power supply module through the power supply switching module.

[0022] In an embodiment of the above start-stop control circuit, the start-stop control circuit further includes a status indication module, and the status indication module includes a main power supply lamp, a main power supply status lamp, a standby power supply lamp, a standby power supply status lamp, and a third relay. The main power supply lamp is electrically connected to the live wire and the neutral wire of the main power supply module respectively. Two energized control terminals of the third relay are electrically connected to the live wire and the neutral wire of the main power supply module respectively. The main power supply status lamp is electrically connected to a normally open contact of the third relay and the load live wire of the power supply switching module respectively;

[0023] The standby power supply lamp is electrically connected to the live wire and the neutral wire of the standby power supply module respectively. The standby power supply status lamp is electrically connected to the load live wire of the power supply switching module and a normally closed contact of the third relay respectively.

[0024] One or more of the above embodiments of the present invention have at least one or more of the following beneficial effects:

[0025] The main power supply module provides electrical energy for the working device and the standby device, and the detection element detects the preset parameter items of all devices in real time. When the value of the preset parameter item detected by the detection element is lower than the set parameter value, the first relay is energized, so that the first switch is energized and closed, and finally at least one standby device is started. Compared with the prior art, the present invention can start the standby device in time when the working device fails, without the need for manual on-site activation, avoiding affecting production and thus avoiding losses to the enterprise.

[0026] Furthermore, by adding a standby power supply module and a power supply switching module, when the main power supply module fails, the power supply switching module switches the power supply of the start-stop control circuit to the standby power supply module to ensure that the working device and / or the standby device work continuously, thus avoiding affecting production.

[0027] Further, by adding a second relay and changing the first switch to be connected to the second relay, when a failure occurs in either the standby device or the alarm notification unit, the staff can clearly determine the problematic circuit based on the power-on and power-off status of the relay, facilitating the staff to promptly repair the faulty location.

[0028] Additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Referring to the accompanying drawings, the disclosure of the present utility model will become more understandable. It is easily understood by those skilled in the art that these drawings are only for illustrative purposes and are not intended to limit the protection scope of the present utility model. In addition, similar numbers in the figures are used to represent similar components, where:

[0030] Figure 1 is a starting control circuit diagram provided by an embodiment of the present utility model;

[0031] Figure 2 is a circuit diagram of a power supply switching module provided by an embodiment of the present utility model.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS

[0033] 1. Main power supply module; 11. Main air switch; 2. Start-stop module; 21. Detection element; 22. First relay; 23. First switch; 24. Second switch; 25. Alarm controller; 26. Alarm notification unit; 261. Alarm; 262. Communication element; 27. Second relay; 3. Working device; 31. Standby device; 311. Manual switch; 312. Lamp control intermediate contactor; 313. Standby machine indicator light; 4. Analysis module; 41. Nitrogen pressure recorder; 42. Electronic pressure gauge; 43. Display screen; 44. Third switch; 5. Pressure regulating valve; 6. Standby power supply module; 61. Standby air switch; 7. Power supply switching module; 71. First air switch; 72. First intermediate contactor; 721. First normally open switch; 722. Normally closed switch; 73. Second air switch; 74. Second intermediate contactor; 741. Second normally open switch; 8. Status indication module; 81. Main power supply lamp; 82. Main power supply status lamp; 83. Standby power supply lamp; 84. Standby power supply status lamp; 85. Third relay; 9. Switching power supply module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Some embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0035] As described in the background art, manufacturers will place multiple nitrogen generators in the workshop for use. When the gas consumption in the workshop is low, some nitrogen generators operate normally and some are shut down for standby. However, if a nitrogen generator in operation fails, employees need to go to the site to manually start the standby nitrogen generator, and by then, the enterprise has already suffered losses.

[0036] Therefore, the present utility model creatively proposes a start-stop control circuit. The main power supply module provides electrical energy for the working equipment and the standby equipment, and the detection element continuously detects the preset parameter items of all equipment. When the value of the preset parameter item detected by the detection element is lower than the set parameter value, the first relay is energized, so that the first switch is energized and closed, and finally at least one standby equipment is started. Compared with the prior art, the present utility model can start the standby equipment in time when the working equipment fails, without the need for manual on-site activation, avoiding affecting production and thus avoiding losses to the enterprise.

[0037] The following will specifically elaborate on the present utility model through specific embodiments.

[0038] Refer to Figure 1 As shown, this embodiment provides a start-stop control circuit. The start-stop control circuit includes a main power supply module 1 and a start-stop module 2. The main power supply module 1 is configured to be electrically connected to at least one working equipment 3 and at least one standby equipment 31. The start-stop module 2 includes a detection element 21, a first relay 22, and a first switch 23. The detection element 21 is used to detect the preset parameter items of all equipment. The first switch 23 is electrically connected to the detection element 21 through the first relay 22, and the first switch 23 is electrically connected to at least one standby equipment 31. Among them, when the detection element 21 detects that the value of the preset parameter item is lower than the set parameter value, the start-stop module 2 starts at least one standby equipment 31 through the first switch 23. One first switch 23 can control one standby equipment 31 or multiple standby equipment 31.

[0039] It should be noted that the energization control end of the first relay 22 is electrically connected to the signal output end of the detection element 21. The energization control end is a port possessed by some relay-type electronic components, generally there are two, and after the two are connected, the corresponding normally open contact inside the electronic component will close and the normally closed contact will open. The signal output end is a port possessed by some detection electronic components. After the electronic component is energized, the electronic component converts some non-electrical variables detected into electrical signals and transmits the qualified electrical signals through the signal output end to achieve corresponding control.

[0040] In addition, it can be understood that a first switch 23 can be connected in series with a standby device 31 to achieve single-device control; or it can be connected in series with multiple standby devices 31 connected in series, and can also be connected in series on the main path of multiple parallel standby devices 31 to achieve control of multiple standby devices 31.

[0041] In this embodiment, the first switch 23 is electrically connected to a common contact and a normally open contact of the first relay 22 respectively. Refer to Figure 1 As shown, NO represents a normally open contact, and NC represents a normally closed contact.

[0042] In this embodiment, the main power supply module 1 selects single-phase electricity. It can be understood that according to the number of devices and the parameters of the devices, the main power supply module 1 can also select two-phase electricity or three-phase electricity, etc.

[0043] As an example rather than a limitation, both the working device 3 and the standby device 31 are nitrogen generators. Without affecting the inventive concept of the present utility model, any kind of machine can be used as the working device 3 and the standby device 31 of the present utility model.

[0044] Among them, it should be noted that the detection element 21 detects the preset parameter items of all devices, which means that according to the cooperation relationship between the devices, if the actions and / or substances generated by all devices are output from the same place, then the detection element 21 detects this common output; if the actions and / or substances generated by all devices are output from different places, then the detection element 21 needs to detect the outputs at different places.

[0045] In addition, in this embodiment, the preset parameter item is the output air pressure of the working device 3 and / or the standby device 31. It can be understood that the preset parameter items of all devices in this embodiment refer to the nitrogen air pressure jointly generated by all devices; correspondingly, the detection element 21 is a pressure transmitter, which is arranged at the front end of the nitrogen outlet pipe in the workshop, so as to detect in real time the air pressure jointly generated by all nitrogen generators in the working state.

[0046] It can be understood that the present utility model can be provided with different numbers of working devices 3 and standby devices 31. As an example rather than a limitation, refer to Figure 1 As shown, in this embodiment, there are two nitrogen generators as the working device 3, and one nitrogen generator as the standby device 31. Specifically, when the detection element 21 detects that the output air pressure generated by all nitrogen generators is lower than the set parameter value, the signal output end of the detection element 21 outputs a signal to the power-on control end of the first relay 22, the coil of the first relay 22 is energized, so that the normally open contact of the first relay 22 is closed, and then at least one standby device 31 is started, so that the standby device 31 can be started in time when the working device 3 fails, avoiding affecting production and causing economic losses.

[0047] Exemplarily, the first switch 23 is a normally open button with a contactor in the locked state, and the first switch 23 is connected in series between the main power supply module 1 and the standby device 31.

[0048] It should be noted that there are various connection methods between the relay, the power supply and the load. In this embodiment, the two energization control terminals of the first relay 22 are short-circuited and then connected to the signal output terminal of the detection element 21; the contactor part of the first switch 23 is electrically connected to a common contact and a normally open contact of the first relay 22, and the contactor and the first relay 22 are interlocked. Specifically, after the coil of the first relay 22 is energized, the normally open contact in the first relay 22 that is electrically connected to the first switch 23 is closed, so that the contactor in the first switch 23 is energized, and then the first switch 23 is closed. Since the contactor and the first relay 22 are interlocked, even if the coil of the first relay 22 is not energized, the first switch 23 can still remain closed, so that the main power supply module 1 and the standby device 31 remain connected, thereby ensuring that the standby device 31 can work stably and continuously.

[0049] In some examples, the first switch 23 is usually built into the box body of some controllers and generally cannot be interfered with manually. Therefore, a manual switch 311 can be provided outside the box, and the first switch 23 is electrically connected to the first relay 22 through the manual switch 311. The staff can manually start and stop the standby device 31 through the manual switch 311. Generally, the manual switch 311 only acts as a wire for the current to pass through the first switch 23 to form a complete circuit.

[0050] Further, referring to Figure 1 As shown, the start-stop module 2 further includes a second switch 24, and the second switch 24 is used to cut off the connection between the standby device 31 and the main power supply module 1. In this example, the second switch 24 is a normally closed button in the locked state. Exemplarily, the second switch 24 is arranged on the branch circuit between the main power supply module 1 and the standby device 31 and is in the same branch circuit as the first switch 23. Specifically, the second switch 24 can be arranged at the site where the working device 3 and the standby device 31 are located. After the staff repairs the faulty working device 3, by manually pressing the second switch 24, the connection between the main power supply module 1 and the standby device 31 is disconnected, so that the contactor of the first switch 23 is disconnected, and thus the first switch 23 is disconnected to stop the operation of the standby device 31.

[0051] In some examples, the start-stop module 2 further includes a lamp control intermediate contactor 312 and a corresponding standby machine indicator lamp 313. When the first switch 23 is closed, the lamp control intermediate relay in the start-stop module 2 is powered on, and the standby machine indicator lamp 313 lights up, indicating to the staff that the standby device 31 is working. When the second switch 24 shuts down the standby device 31, the lamp control intermediate relay loses power, and the standby machine indicator lamp 313 goes out.

[0052] Furthermore, the start-stop module 2 further includes an alarm controller 25 and an alarm notification unit 26. The alarm controller 25 is electrically connected to the detection element 21. Specifically, the alarm controller 25 is electrically connected to the signal output end of the detection element 21. Among them, the alarm notification unit 26 includes an alarm 261. The alarm 261 is electrically connected to the first relay 22, and when the detection element 21 detects that the value of the preset parameter item is lower than the set parameter value, the alarm controller 25 starts the alarm 261 through the first relay 22.

[0053] In this embodiment, the alarm controller 25 is a 4G alarm controller 25. It can be understood that other controllers with communication and signal analysis functions, such as 3G alarm controllers, can be used as the alarm controller 25 of the present invention. Specifically, after the detection element 21 detects all the preset parameter items of the devices, it will continuously output signals through the signal output end. During the signal passing through the alarm controller 25, the alarm controller 25 determines the signal. Only when the value of the preset parameter item meets the condition of being lower than the set parameter value, the alarm controller 25 will send the alarm signal to the alarm 261. Otherwise, even if the alarm 261 is powered on, the alarm 261 will not give an alarm. Through the cooperation of the alarm controller 25 and the alarm 261, the alarm 261 can correctly give an alarm and timely remind the staff to handle the faulty working device 3.

[0054] In addition, the first relay 22 is also connected to a communication element 262. The communication element 262 is configured to send a phone call or text message notification to the staff under the control of the alarm controller 25. Among them, the text message notification includes instant messaging methods such as WeChat.

[0055] Furthermore, the start-stop module 2 further includes a second relay 27. The power-on control end of the second relay 27 is electrically connected to the power-on control end of the first relay 22. The first switch 23 is electrically connected to the detection element 21 through the second relay 27.

[0056] In this embodiment, for the convenience of description, the two power-on control terminals of the first relay 22 and the second relay 27 are both named A1 and A2. Specifically, A1 of the first relay 22 and the second relay 27 are both connected to the signal output terminal of the detection element 21, and A2 of the first relay 22 is electrically connected to A2 of the second relay 27; by changing the first switch 23 to be connected to the second relay 27, when a failure occurs in one of the standby device 31 and the alarm notification unit 26, the staff can clearly judge the faulty circuit based on the power-on and power-off conditions of the relay, which is convenient for the staff to perform timely maintenance on the faulty part.

[0057] In addition, in some examples, a manual switch 311 can be provided between the first switch 23 and the second relay 27 to manually start and stop the standby device 31.

[0058] In some examples, the start-stop control circuit further includes an analysis module 4. The analysis module 4 is electrically connected to the main power module 1 through a switching power supply module 9. The analysis module 4 includes a nitrogen pressure recorder 41, an electronic pressure gauge 42, and a display screen 43. The nitrogen pressure recorder 41 is electrically connected to the main power module 1, and the electronic pressure gauge 42 and the display screen 43 are respectively electrically connected to the switching power supply module 9, and the signal output terminals of the electronic pressure gauge 42 and the display screen 43 are respectively electrically connected to the nitrogen pressure gauge recorder.

[0059] Specifically, the electronic pressure gauge 42 is arranged on the nitrogen outlet pipeline. When the working device 3 and / or the standby device 31 are working, the electronic pressure gauge 42 real-time detects the pressure of the nitrogen output by the working device 3 and / or the standby device 31 in the working state, and transmits the value to the nitrogen pressure recorder 41. At the same time, the specific recording parameters can also be adjusted or other operations can be performed through the display screen 43.

[0060] In this embodiment, the switching power supply module 9 is a DC24V switching power supply. In some examples, the start-stop module 2 is electrically connected to the main power module 1 through the switching power supply module 9. Refer to Figure 1 As shown, 0V and 24V at the switching power supply module 9 in the figure are voltage values.

[0061] In some examples, the switching power supply module 9 is electrically connected to the main power module 1 through a third switch 44.

[0062] Among them, the third switch 44 is an air switch. While protecting the circuit, it is convenient for the staff to disconnect the main power module 1 from the analysis module 4 to repair and adjust the analysis module 4.

[0063] Furthermore, the main power module 1 is electrically connected to a pressure regulating valve 5, and the pressure regulating valve 5 is used to regulate the output air pressure of the working device 3 and / or the standby device 31.

[0064] Specifically, the pressure stabilizing valve 5 is arranged on the nitrogen outlet pipeline, so as to adjust the pressure of the output nitrogen, so that the pressure of the transported nitrogen can still be kept stable in case of faults of the working equipment 3 and the like.

[0065] Furthermore, in some examples, the start-stop control circuit further includes a standby power supply module 6 and a power supply switching module 7, and the start-stop module 2 is electrically connected to the main power supply module 1 or the standby power supply module 6 through the power supply switching module 7.

[0066] Among them, the connection object of the start-stop module 2 can be adjusted according to actual needs. In this embodiment, the start-stop module 2 preferentially connects to the main power supply module 1, and connects to the standby power supply module 6 when the main power supply module 1 fails. After the fault of the main power supply module 1 is eliminated, it connects to the main power supply module again.

[0067] In addition, it should be noted again that when the standby power supply module 6 is electrically connected to the standby equipment 31, the second switch 24 can also cut off the connection between the standby equipment 31 and the standby power supply module 6.

[0068] In this embodiment, the power supply switching module 7 is a dual-power automatic transfer switch.

[0069] As an example rather than a limitation, referring to Figure 2 As shown, the power supply switching module 7 includes two single-phase power supplies. Each power supply of the electric box includes a zero line and a live line. For the convenience of representation, the live line and the zero line of the main power supply module 1 are respectively marked as L1 and N1, and the live line and the zero line of the standby power supply module 6 are respectively marked as L2 and N2. L1 and L2 are connected in series, and N1 and N2 are connected in series. Along the current direction on L1 and N1, a first air switch 71, a first intermediate contactor 72, and a first normally open switch 721 corresponding to the first intermediate contactor 72 are successively arranged. Along the current direction on L2 and N2, a second air switch 73, a second intermediate contactor 74, and a second normally open switch 741 corresponding to the second intermediate contactor 74 are successively arranged. At the same time, a normally closed switch 722 corresponding to the first intermediate contactor 72 is arranged between the second intermediate contactor 74 and L2.

[0070] Among them, referring to Figure 2 As shown, port A is the load live line, and port B is the load zero line.

[0071] To facilitate the control of the connection between the main power supply module 1 and the standby power supply module 6 and the power supply switching module 7, a main air switch 11 and a standby air switch 61 are respectively arranged between the main power supply module 1 and the power supply switching module 7, and between the standby power supply module 6 and the power supply switching module 7. When the device is working, the main air switch 11 and the standby air switch 61 can be all closed, and then the first air switch 71 is closed. The first intermediate contactor 72 is energized, so that the first normally open switch 721 corresponding to the first intermediate contactor 72 is closed, and the normally closed switch 722 is opened. As a result, the main power supply module 1 is connected to the working device 3, the switching power supply module and / or the standby device 31; at the same time, the second intermediate contactor 74 is de-energized, so that the second normally open switch 741 corresponding to the second intermediate contactor 74 is opened, and the disconnection between the standby power supply module 6 and the power supply switching module 7 is maintained.

[0072] When the main power supply module 1 fails to supply power, the first intermediate contactor 72 is de-energized, and the normally closed switch 722 corresponding to the first intermediate contactor 72 is closed, so that the second intermediate contactor 74 is energized, and then the second normally open switch 741 corresponding to the second intermediate contactor 74 is closed. Finally, the standby power supply module 6 is connected to the working device 3, the switching power supply module and / or the standby device 31.

[0073] Furthermore, the start-stop control circuit further includes a status indication module 8. The status indication module 8 includes a main power supply lamp 81, a main power supply status lamp 82, a standby power supply lamp 83, a standby power supply status lamp 84 and a third relay 85. The main power supply lamp 81 is respectively electrically connected to the live wire and the neutral wire of the main power supply module 1. Two energization control terminals of the third relay 85 are respectively electrically connected to the live wire and the neutral wire of the main power supply module 1. The main power supply status lamp 82 is respectively electrically connected to a normally open contact of the third relay 85 and the load live wire of the power supply switching module 7.

[0074] The standby power supply lamp 83 is respectively electrically connected to the live wire and the neutral wire of the standby power supply module 6. The standby power supply status lamp 84 is respectively electrically connected to the load live wire of the power supply switching module 7 and a normally closed contact of the third relay 85.

[0075] The function of the status indication module 8 is to prompt the staff to know the working status of the current main power supply module 1 and the standby power supply module 6. In this embodiment, the components used for prompting in the status indication module 8 are lamps. It can be understood that the components used for prompting can also be components that can emit different sounds, as long as the staff can distinguish the main power supply module 1 and the standby power supply module 6.

[0076] Specifically, when the main power supply module 1 is working, the current flows into the main power supply lamp 81 through the live wire of the main power supply module 1 and then flows out, and then flows back to the neutral wire of the main power supply module 1, and the main power supply lamp 81 lights up; when the current flows through the main power supply lamp 81, the current also flows through one of the energized control terminals of the third relay 85, and when the current flows to the main power supply lamp 81, it also flows to the other energized control terminal of the third relay 85, the third relay 85 is energized, the normally open contact corresponding to the third relay 85 closes, the current flows to the main power supply status lamp 82, and successively flows through the main power supply status lamp 82 and a nitrogen generator, and then flows back to the neutral wire of the main power supply module 1, and the main power supply status lamp 82 lights up. During this process, the standby power supply lamp 83 and the standby power supply status lamp 84 are not energized.

[0077] When the main power supply module 1 fails, the power supply switching module 7 switches the power supply terminal of the start-stop control power supply to the standby power supply module 6, and the standby power supply module 6 starts to work. At this time, the main power supply lamp 81 and the main power supply status lamp 82 are all turned off, the third relay 85 loses power, the current flows into the standby power supply lamp 83 through the live wire of the standby power supply module 6 and then flows out, and then flows back to the neutral wire of the standby power supply module 6, and the standby power supply lamp 83 lights up; at the same time, the current flows into the standby power supply status lamp 84 through the load live wire of the power supply switching module 7 and then flows out, and then flows back to the neutral wire of the standby power supply module 6 through one of the energized control terminals of the third relay 85, and the standby power supply status lamp 84 lights up.

[0078] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A start-stop control circuit, characterized in that: The start-stop control circuit comprises: A main power module (1), the main power module (1) being configured to be electrically connected to at least one working device (3) and at least one standby device (31); A start-stop module (2), the start-stop module (2) comprising a detection element (21), a first relay (22) and a first switch (23), the detection element (21) being used to detect preset parameter items of all devices, the first switch (23) being electrically connected to the detection element (21) via the first relay (22), and the first switch (23) being electrically connected to at least one of the standby devices (31); Wherein, when the detection element (21) detects that the value of the preset parameter item is lower than the set parameter value, the start-stop module (2) starts at least one of the backup devices (31) through the first switch (23).

2. The start-stop control circuit according to claim 1, characterized in that: The start-stop module (2) further comprises a second switch (24), wherein the second switch (24) is used to cut off the connection between the backup device (31) and the main power module (1).

3. The start-stop control circuit according to claim 1, characterized in that: The start-stop module (2) further comprises an alarm controller (25) and an alarm notification unit (26); the alarm controller (25) is electrically connected to the detection element (21); The alarm notification unit (26) comprises an alarm (261), the alarm (261) is electrically connected to the first relay (22), and when the detection element (21) detects that the value of the preset parameter item is lower than the set parameter value, the alarm controller (25) activates the alarm (261) through the first relay (22).

4. The start-stop control circuit according to claim 3, characterized in that: The start-stop module (2) further comprises a second relay (27), wherein a power-on control end of the second relay (27) is electrically connected to a power-on control end of the first relay (22), and the first switch (23) is electrically connected to the detection element (21) via the second relay (27).

5. The start-stop control circuit according to claim 1, characterized in that: The working equipment (3) and the standby equipment (31) are both nitrogen generators.

6. The start-stop control circuit according to claim 5, characterized in that: The start-stop control circuit further comprises an analysis module (4), the analysis module (4) being electrically connected to the main power module (1) via a switch power module (9), the analysis module (4) comprising a nitrogen pressure recorder (41), an electronic pressure gauge (42) and a display screen (43), the nitrogen pressure recorder (41) being electrically connected to the main power module (1), the electronic pressure gauge (42) and the display screen (43) being electrically connected to the switch power module (9), respectively, and signal output ends of the electronic pressure gauge (42) and the display screen (43) being electrically connected to the nitrogen pressure recorder (41), respectively.

7. The start-stop control circuit according to claim 6, characterized in that: The switch power module (9) is electrically connected to the main power module (1) via a third switch (44); and / or, The start-stop module (2) is electrically connected to the main power module (1) via the switch power module (9).

8. The start-stop control circuit according to claim 5, characterized in that: The main power supply module (1) is electrically connected to a pressure regulating valve (5), and the pressure regulating valve (5) is used to adjust the output gas pressure of the working equipment (3) and / or the standby equipment (31).

9. The start-stop control circuit according to any one of claims 1 to 8, characterized in that: The start-stop control circuit further comprises a backup power supply module (6) and a power supply switching module (7), and the start-stop module (2) is electrically connected to the main power supply module (1) or the backup power supply module (6) via the power supply switching module (7).

10. The start-stop control circuit according to claim 9, characterized in that: The start-stop control circuit further comprises a status indication module (8), wherein the status indication module (8) comprises a main power light (81), a main power status light (82), a backup power light (83), a backup power status light (84) and a third relay (85), wherein the main power light (81) is electrically connected to the live wire and the neutral wire of the main power module (1), respectively, and the two power-on control ends of the third relay (85) are electrically connected to the live wire and the neutral wire of the main power module (1), respectively, and the main power status light (82) is electrically connected to a normally open contact of the third relay (85) and the load live wire of the power switching module (7); The backup power light (83) is electrically connected to the live wire and the neutral wire of the backup power module (6), respectively, and the backup power status light (84) is electrically connected to the load live wire of the power switching module (7) and a normally closed contact of the third relay (85), respectively.

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