Calibration device and method for pressure switch of circuit breaker hydraulic mechanism

Abstract

The invention discloses a circuit breaker hydraulic mechanism pressure switch verification device and method, and relates to the field of power equipment. The circuit breaker hydraulic mechanism pressure switch verification device comprises a first measurement loop used for obtaining a node state of a first node of a circuit breaker hydraulic mechanism pressure switch; the second measurement loop is used for acquiring an input current of a target node of the pressure switch of the circuit breaker hydraulic mechanism; the programmable controller is connected with the first measurement loop and the second measurement loop and is used for determining a verification result of the pressure switch of the circuit breaker hydraulic mechanism according to the node state of the first node and the input current of a target node; and the human-computer interface is connected with the programmable controller and is used for displaying the verification result. The device can verify the pressure switch, reduces the manual participation, and can save the labor cost.

Description

Technical Field

[0001] The present application relates to the field of electric power equipment, and in particular to a calibration device and method for a pressure switch of a hydraulic mechanism of a circuit breaker. Background Art

[0002] The hydraulic mechanism of the circuit breaker is widely used in 220kV and above voltage levels, especially in the circuit breaker mechanism of power supply equipment in important areas, because of its advantages of small size, light weight, low power consumption, stable output, large output power, simple operation and high degree of automation. The hydraulic mechanism of the circuit breaker has the characteristics of high manufacturing precision of hydraulic components, complex process, difficult maintenance and inspection, and high technical level requirements. In order to ensure the accuracy of hydraulic transmission in the energy conversion process, the hydraulic mechanism of the circuit breaker needs to be maintained regularly. One of the most important items is the calibration of the pressure locking node of the oil pressure switch. The pressure control and locking signal of the hydraulic mechanism of the circuit breaker are mainly achieved by the action of the oil pressure switch. The travel switches integrated on the oil pressure switch correspond to different pressure values, which are used to control the hydraulic pressure of the mechanism, covering the start time of the oil pump motor, the start and stop of the oil pump motor, the reclosing lock, the closing lock, the opening lock, etc. Only by ensuring that the pressure value is within the standard range can the circuit breaker be opened and closed normally.

[0003] The current calibration method for pressure switches is to use a multimeter to measure the on-off state of the auxiliary contacts, use a clamp meter to measure the current of the hydraulic motor and manually record the running time during repeated pressure build-up and pressure relief, and read the pressure value on the pressure gauge and record it, and compare it with the manufacturer's standard value to determine whether it is qualified. If unqualified conditions are found, it is necessary to adjust the stroke of the pressure switch node for calibration. This calibration method requires repeated testing with a multimeter, repeated wiring operations, and detection of the on-off state of the switch contacts at each node. At the same time, the pressure gauge reading must be checked, which requires a large workload and a complicated process. It is also easy to cause verification to be asynchronous, increasing the calibration error. Summary of the invention

[0004] The present application provides a calibration device and method for a pressure switch of a hydraulic mechanism of a circuit breaker, which can more conveniently calibrate the pressure switch and reduce manpower and time errors.

[0005] In a first aspect, the present application provides a calibration device for a pressure switch of a hydraulic mechanism of a circuit breaker, comprising:

[0006] A first measurement loop is used to obtain the node status of each node of the pressure switch of the circuit breaker hydraulic mechanism;

[0007] A second measurement loop, used for acquiring an input current of a target node of the pressure switch;

[0008] A programmable controller connected to the first measurement loop interface and the second measurement loop interface, and configured to determine the pressure value of the pressure switch according to the node status of each node and the input current of the target node; and determine the calibration result of the pressure switch according to the pressure value;

[0009] A human-machine interface is connected to the programmable controller and is used to display the verification result.

[0010] The first measuring loop and the second measuring loop share a set of interfaces, and the interfaces corresponding to the measuring loops are switched by a programmable controller.

[0011] According to the calibration device of the pressure switch of the hydraulic mechanism of the circuit breaker of this embodiment, it includes a first measuring circuit and a second measuring circuit. The programmable controller is connected to the interfaces of the two measuring circuits. The input current on different nodes of the pressure switch can be directly obtained through the interfaces of the two measuring circuits, and then the node state of each node is judged according to the input current of each node, so as to determine the calibration result. The process of the programmable controller obtaining the input current of the node and determining the calibration result is less time-consuming and can complete the detection quickly; and the current of the node can be read in real time through the above two input interfaces, so as to determine the corresponding pressure value in real time, and the reading is more synchronized, which can reduce the time error and reduce the problem of asynchronous reading and detection. In addition, after connecting the first measuring circuit interface and the second measuring circuit interface, manual participation is reduced, which can reduce labor costs.

[0012] In an exemplary embodiment, the apparatus further comprises:

[0013] The current sensor has an input end located at the target node of the pressure switch of the circuit breaker hydraulic mechanism, and an output end connected to the first measurement circuit interface.

[0014] In an exemplary embodiment, the current sensor is a clamp-type DC current sensor, the input end of which is a current clamp, and the current clamp is clamped at the circuit loop corresponding to the target node.

[0015] In an exemplary embodiment, the first node includes the oil pump start and stop, reclosing lock, closing lock, and opening lock of the circuit breaker hydraulic mechanism pressure switch; the target node includes the motor circuit of the circuit breaker hydraulic mechanism pressure switch.

[0016] In an exemplary embodiment, the apparatus further comprises:

[0017] A buzzer connected to the programmable controller;

[0018] When the verification result is abnormal, the programmable controller triggers the buzzer to send a reminder signal.

[0019] In an exemplary embodiment, the programmable controller is further configured to obtain a first pressure value of the pressure switch of the hydraulic mechanism of the circuit breaker when the node state of each node satisfies a first preset condition, and to obtain a second pressure value of the pressure switch of the hydraulic mechanism of the circuit breaker when the input current of the target node and the state of each node satisfy a second preset condition;

[0020] A verification result of the pressure switch of the circuit breaker hydraulic mechanism is determined according to the first pressure value and the second pressure value.

[0021] In an exemplary embodiment, the human-machine interface is further used to input a current determination threshold;

[0022] The programmable controller determines whether the input current of the target node meets a second preset condition through the current determination threshold.

[0023] In a second aspect, the present application provides a method for calibrating a pressure switch of a hydraulic mechanism of a circuit breaker, comprising:

[0024] During the pressure reduction process of the circuit breaker hydraulic mechanism, the node status of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the first measurement circuit interface;

[0025] When the node state of each node meets the first preset condition, obtaining a first pressure value of the pressure switch of the circuit breaker hydraulic mechanism;

[0026] During the pressure boosting process of the circuit breaker hydraulic mechanism, the input current of the target node is obtained through the second measurement loop interface, and the node state of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the change of the current, and when the input current and the node state of each node meet the second preset condition, the second pressure value of the circuit breaker hydraulic mechanism pressure switch is obtained;

[0027] The calibration result of the pressure switch of the circuit breaker hydraulic mechanism is determined according to the first pressure value and the second pressure value.

[0028] In an exemplary embodiment, the node state includes a current state; when the node state of each node satisfies a first preset condition, obtaining a first pressure value of the pressure switch of the circuit breaker hydraulic mechanism includes:

[0029] When the current state of the target node changes from no current to current, obtaining a corresponding first pressure value;

[0030] When the current state of other nodes except the target node changes from current supply to no current supply, the corresponding first pressure value is acquired.

[0031] In an exemplary embodiment, when the input current and the node status of each node meet a second preset condition, obtaining a second pressure value of the pressure switch of the circuit breaker hydraulic mechanism includes:

[0032] When the input current is greater than the current determination threshold, obtaining a corresponding second pressure value;

[0033] When the current state of other nodes except the target node changes from no current to current, the corresponding second pressure value is acquired.

[0034] According to the calibration method of the pressure switch of the circuit breaker hydraulic mechanism in this embodiment, the state of the node of the pressure switch is obtained through the first measurement circuit interface and the second measurement circuit interface, which reduces manual measurement and can save manpower; after obtaining the state of the node, the corresponding pressure value can be read, and then the calibration result is determined, which has high real-time performance, can reduce detection errors, and improve the real-time and accuracy of the calibration.

[0035] In a third aspect, the present application provides an electronic device, the electronic device comprising a memory and one or more processors. The memory stores one or more computer programs, the computer programs comprising instructions, and when the instructions are executed by the processor, the electronic device can execute the circuit breaker hydraulic mechanism pressure switch verification method as in the second aspect.

[0036] In a fourth aspect, the present application provides a computer-readable storage medium having instructions stored therein. When the instructions are executed on an electronic device, the electronic device executes the circuit breaker hydraulic mechanism pressure switch calibration method as in the second aspect.

[0037] In a fifth aspect, the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the circuit breaker hydraulic mechanism pressure switch calibration method as described in the second aspect.

[0038] It can be understood that the beneficial effects that can be achieved by providing the above-mentioned electronic device, computer-readable storage medium, and computer program product can refer to the beneficial effects in the first aspect or the second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A block diagram of a circuit breaker hydraulic mechanism pressure switch calibration device provided in an embodiment of the present application;

[0040] Figure 2 A circuit schematic diagram of a circuit breaker hydraulic mechanism pressure switch calibration device provided in an embodiment of the present application;

[0041] Figure 3Another circuit schematic diagram of the circuit breaker hydraulic mechanism pressure switch calibration device provided in an embodiment of the present application;

[0042] Figure 4 Another circuit schematic diagram of the circuit breaker hydraulic mechanism pressure switch calibration device provided in the embodiment of the present application;

[0043] Figure 5 A schematic flow chart of a pressure switch method for a circuit breaker hydraulic mechanism provided in an embodiment of the present application;

[0044] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. For example, the first chip and the second chip are only used to distinguish different chips, and their order is not limited. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference. It should be noted that in the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design solutions. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way. In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more.

[0046] It should be noted that the “at…” in the embodiments of the present application may be the instant when a certain situation occurs, or may be a period of time after the occurrence of a certain situation, and the embodiments of the present application do not specifically limit this.

[0047] The implementation of this embodiment will be described in detail below with reference to the accompanying drawings.

[0048] This embodiment provides a circuit breaker hydraulic mechanism pressure switch calibration device,

[0049] Figure 1 A structural diagram of a circuit breaker hydraulic mechanism pressure switch calibration device provided in an embodiment of the present application is shown.

[0050] like Figure 1 As shown, the circuit breaker hydraulic mechanism pressure switch calibration device specifically includes:

[0051] The measurement circuit interface 11 is used to obtain the node status and input current of each node of the pressure switch of the circuit breaker hydraulic mechanism.

[0052] The charging interface 12 is used to obtain the input current of the target node of the pressure switch.

[0053] Programmable Controller( Figure 1 (not shown), connected to the first measurement loop interface and the second measurement loop interface through a measurement loop interface, and used to determine the pressure value of the pressure switch according to the node status of each node and the input current of the target node; and determine the calibration result of the pressure switch according to the pressure value.

[0054] A human-machine interface 13 is connected to the programmable controller and is used to display the verification result.

[0055] The main body shell 14 is mainly composed of polyethylene material and has insulation and protection functions.

[0056] The first measurement circuit and the second measurement circuit share the measurement circuit interface 11, and the measurement circuits corresponding to the interfaces are switched by the programmable controller. Figure 2 As shown, the first measuring circuit and the second measuring circuit are switched by a switch, and the fast switch is switched by a programmable controller.

[0057] The human-machine interface 13 can display test options, including a boost test and a step-down test. When the user selects the step-down test in the human-machine interface 13, the programmable controller connects the first test circuit and disconnects the second test circuit. When the user selects the boost test in the human-machine interface 13, the programmable controller connects the second test circuit and disconnects the first test circuit.

[0058] Among them, the node refers to the different locking nodes on the control circuit of the circuit breaker hydraulic mechanism pressure switch, and the target node is one of them. Exemplarily, the node includes the oil pump start and stop node, reclosing lock, closing lock, and opening lock of the circuit breaker hydraulic mechanism pressure switch; the target node is the start and stop node. The node state is used to indicate whether the node is closed or open, and the node state can specifically be current or no current.

[0059] The measurement loop interface 11 may include multiple ones, each of which is connected to a node. When the pressure switch of the circuit breaker hydraulic mechanism is started, if the node is closed, a high level signal is generated at the measurement loop interface 11, and if the node is disconnected, a low level signal is generated. The level signal generated can be used to determine whether the node is closed or disconnected, that is, the node state of the node can be obtained.

[0060] The measurement loop interface 11 can transmit the node status to a programmable controller (PC), and the measurement loop interface 11 can also transmit the input current of the target node to the programmable controller. After receiving the node status and the input current, the programmable controller can determine whether it is necessary to read the pressure value of the circuit breaker hydraulic mechanism, thereby determining whether the pressure switch is normal according to the pressure values ​​at different node states, and obtaining a verification result, which is used to indicate whether the pressure switch is normal or abnormal, and the verification result can also be used to indicate whether each node is normal or abnormal.

[0061] The programmable controller can then transmit the verification results to the human-computer interface (HMI) for display.

[0062] Exemplarily, the device may further include: a first measurement circuit detection connecting cable, one end of which is connected to the measurement circuit interface 11, and the other end is connected to each node of the control cabinet of the circuit breaker hydraulic mechanism pressure switch to form a first measurement circuit, such as Figure 3 shown.

[0063] The first measurement circuit detection connection cable can be an aviation plug cable, one end of which is a plug side and the other end is a pin terminal side. The plug side is connected to the measurement circuit interface on the calibration device of the circuit breaker hydraulic mechanism pressure switch, and the pin terminal side is connected to the node on the control cabinet of the circuit breaker hydraulic mechanism pressure switch to form a first measurement circuit. The control cabinet of the circuit breaker hydraulic mechanism pressure switch includes a plurality of terminals led out from the circuit breaker hydraulic mechanism pressure switch, which can provide users with a port for connecting the circuit breaker hydraulic mechanism.

[0064] The device may also include: a current sensor, the input end of which is connected to the target node of the pressure switch of the circuit breaker hydraulic mechanism, and the output end of which is connected to the measurement circuit interface 11, thereby forming a second measurement circuit, such as Figure 4 shown.

[0065] The current sensor is a clamp-type DC current sensor, including an input end and an output end. The input end is a current clamp, which is clamped in the circuit loop where each node is located to detect the input current of the node. The output end can be a plug side, which is inserted into the measurement loop interface 11 on the calibration device, so as to transmit the input current to the programmable controller.

[0066] Exemplarily, the nodes include the oil pump start and stop node, reclosing lock node, closing lock node, opening lock node and other nodes of the circuit breaker hydraulic mechanism pressure switch; the circuit loop where the target node is located is the oil pump motor circuit of the circuit breaker hydraulic mechanism pressure switch.

[0067] This embodiment may include five measurement circuit interfaces 11 and a charging interface 12. In the step-down test, the five measurement circuit interfaces 11 are respectively connected to the oil pump start and stop, reclosing lock, closing lock, opening lock and other nodes on the control cabinet of the circuit breaker hydraulic mechanism through detection cables, so as to detect the node status of these four nodes. In the boost test, the five measurement circuit interfaces 11 clamp the corresponding output line of the node through a clamp-type DC current sensor to detect the change of current, so as to obtain the state of the node. The first measurement circuit and the second measurement circuit share the measurement circuit interface, and the interface corresponding to the measurement circuit is switched by the programmable controller.

[0068] When the measurement loop interface 11 is connected to the node of the pressure switch, a voltage can be applied to both ends of the node of the pressure switch, and a current detector connected in series in the loop can determine the current in the loop. For example, the verification device also includes a switch connected to a power supply, and when the switch is closed, a voltage can be provided to both ends of the node corresponding to the measurement loop interface.

[0069] After the programmable controller receives the node status and the input current loaded on the pressure switch of the circuit breaker hydraulic mechanism, it can determine whether it is necessary to read the corresponding pressure value. Specifically, during the depressurization process of the circuit breaker hydraulic mechanism, when the current state of the target node changes from no current to current, the corresponding first pressure value is obtained; when the current state of other nodes except the target node changes from current to no current, the corresponding first pressure value is obtained, thereby obtaining a set of pressure values ​​corresponding to each node. The programmable controller can compare the measured set of pressure values ​​(i.e., the first pressure value) with the preset pressure value range of each node. If the measured pressure value is within the preset pressure value range, the depressurization process is normal. If the pressure value corresponding to a node in the measured pressure value exceeds the preset pressure value range of the node, there is an abnormality in the depressurization process.

[0070] Similarly, during the boosting process of the circuit breaker hydraulic mechanism, the programmable controller can obtain the second pressure value corresponding to the target node when the input current corresponding to the target node is less than the current judgment threshold; when the current state of other nodes except the target node changes from no current to current, the second pressure values ​​corresponding to other nodes are obtained to obtain a group of second pressure values. By comparing this group of pressure values ​​with the preset pressure value range of each node during the boosting process, it is determined whether the boosting process is normal. The preset pressure value range of each node during boosting can be different from the preset pressure value range of each node during depressurization.

[0071] When the current in the circuit loop corresponding to the target node is less than the current determination threshold, it can be determined that the motor stops running.

[0072] The human-machine interface 13 can display the verification result, for example, the human-machine interface 13 can display text information such as "the start node is normal, the reclosing lock node is abnormal", etc. The human-machine interface 13 can display pre-edited text according to the input status of the five input ports.

[0073] In an exemplary embodiment, the human-machine interface 13 can also be used to input a current determination threshold; the programmable controller determines the verification result of the pressure switch of the circuit breaker hydraulic mechanism through the current determination threshold, the node state and the input current.

[0074] The user can input a current determination threshold in the human-machine interface 13. The current determination threshold may refer to the minimum value when the motor starts. When the programmable controller determines that the input current is greater than or equal to the current determination threshold, the programmable controller may determine that the oil pump motor starts, and when the input current is less than the current determination threshold, the programmable controller may determine that the oil pump motor stops.

[0075] In an exemplary embodiment, the verification device may further include: a buzzer connected to the programmable controller; when the verification result is abnormal, the programmable controller triggers the buzzer to send a reminder signal. Alternatively, the buzzer may also be used to prompt the abnormality of each node or target node, and each input interface may trigger the buzzer according to a pre-edited rule.

[0076] Exemplarily, the verification device may further include a charging interface 12, a polyethylene shell 14; or other necessary components, such as a battery assembly, a load resistor, etc., but the present embodiment is not limited thereto.

[0077] Furthermore, the present embodiment also provides a circuit breaker hydraulic mechanism pressure switch calibration method, which implements the calibration based on the circuit breaker hydraulic mechanism pressure switch calibration device.

[0078] Exemplarily, the circuit breaker hydraulic mechanism pressure switch calibration method can be applied to various electronic devices such as computers (PCs), tablet computers, virtual reality / augmented reality devices, wearable devices, industrial computers, and vehicle computers; it can also be applied to servers, cloud computing, server clusters, etc. These electronic devices can also be used as programmable controllers in the above-mentioned circuit breaker hydraulic mechanism pressure switch calibration device.

[0079] Figure 5 The figure shows a flow chart of the method for checking the pressure switch of the circuit breaker hydraulic mechanism. Figure 5 As shown, the circuit breaker hydraulic mechanism pressure switch calibration method includes:

[0080] Step 201: During the pressure reduction process of the circuit breaker hydraulic mechanism, the node status of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the measurement loop interface, wherein the node includes the target node.

[0081] Step 202: When the node status of each node meets a first preset condition, a first pressure value of the pressure switch is obtained.

[0082] Step 203: During the pressure boosting process of the circuit breaker hydraulic mechanism, the input current of the target node is obtained through the measurement loop interface, and the node status of each node of the pressure switch is obtained through the change of the input current. When the input current and the node status of each node meet the second preset condition, the second pressure value of the pressure switch is obtained.

[0083] Step 204: Determine a calibration result of the pressure switch according to the first pressure value and the second pressure value.

[0084] Exemplarily, the node includes the oil pump start and stop, reclosing lock, closing lock, and opening lock of the circuit breaker hydraulic mechanism pressure switch; the target node includes the oil pump start and stop node. The node state of the node includes current and no current.

[0085] The current status of nodes such as start and stop, reclosing lock, closing lock, and opening lock can be obtained through the measurement loop interface. The current in the circuit loop corresponding to the start and stop node, that is, the input current, can also be obtained through the measurement loop interface.

[0086] The on and off of the node can be determined by the current state or voltage state, thereby judging whether the pressure switch is normal. When the oil pressure of the circuit breaker hydraulic mechanism meets the set value, the node is lifted up and is in a closed state. When the oil pressure is lower than the set value, the node pops open and is in a disconnected state. At this time, there is a breakpoint in the control circuit, and the corresponding control function is locked and cannot work.

[0087] Exemplarily, during the depressurization process of the circuit breaker hydraulic mechanism, the current state of each node is detected in real time through each measurement loop interface. When the current state of the target node changes from no current to current, the corresponding first pressure value is obtained; when the current state of other nodes except the target node changes from current to no current, the corresponding first pressure value is obtained, thereby obtaining the first pressure value corresponding to each node during the depressurization process. By comparing the first pressure value corresponding to each node with the preset pressure value range of each node during the depressurization process, it is determined whether the first pressure value of each node is within the corresponding preset pressure value range. If so, the depressurization process of the circuit breaker hydraulic mechanism is normal. If the first pressure value of a certain node exceeds the corresponding preset pressure value range, it can be determined that there is an abnormality in the pressure switch of the circuit breaker hydraulic mechanism.

[0088] When the circuit breaker hydraulic mechanism is reducing pressure (relieving pressure), it is usually done manually, and the control power supply (oil pump motor circuit) is in a disconnected state, so the control circuit is not energized. At this time, the on-off of the node can be measured, that is, voltage is applied at both ends of the node to verify the on-off of the node, read the corresponding oil pressure value, and compare it with the manufacturer's set value to determine whether it is normal. When the pressure relief is verified, the low oil pressure closing lock, low oil pressure opening lock, and low oil pressure reclosing lock nodes are initially in a closed state. As the oil pressure drops, the node changes from closed to open. During the verification, the circuit breaker hydraulic mechanism pressure switch verification device applies voltage to both ends of the node to measure the node on-off. At the beginning, there is current in the node, and the current disappears at the moment of springing open. At this time, the corresponding oil pressure (i.e., the first pressure value) is read. The oil pump start / stop node is opposite to the above nodes. It is in the disconnected or stopped state at the beginning. As the oil pressure drops, the node changes from disconnected to closed. During verification (when voltage is applied to both ends of the node to measure the on / off state of the node), there is no current in the node at the beginning. Current is generated at the moment of closing. At this time, the corresponding oil pressure (i.e. the first pressure value of the start / stop node) is read and compared with the manufacturer's specified value to achieve verification.

[0089] During the boosting process of the circuit breaker hydraulic mechanism, the input current of the target node is detected in real time through the second measurement loop interface, and the current status of other nodes (nodes other than the target node) is detected in real time. When the input current corresponding to the target node is less than the current judgment threshold, it can be determined that the motor has stopped, and the corresponding second pressure value is obtained at this time; when the status of other nodes other than the target node changes from no current to current, the corresponding second pressure value is obtained, so as to obtain the second pressure value corresponding to each node. By comparing the second pressure value corresponding to each node with the preset pressure value range of each node in the boosting process, it is determined whether the second pressure value of each node is within the corresponding preset pressure value range. If so, the boosting process of the circuit breaker hydraulic mechanism is normal. If the second pressure value of a certain node exceeds the corresponding preset pressure value range, it can be determined that there is an abnormality in the pressure switch of the circuit breaker hydraulic mechanism.

[0090] The input current is compared with a pre-stored current determination threshold. If the input current is greater than or equal to the current determination threshold, it can be determined that the motor is started; if the input current is less than the current determination threshold, it is determined that the motor is stopped.

[0091] When the pressure switch of the circuit breaker hydraulic mechanism is boosting, only electric pressure can be applied and the oil pump can be used. The control power supply is in the closed state, so the control circuit is energized. At this time, a clamp-type ammeter can be added to one end of the node, and the corresponding oil pressure value can be read through the state of the node. Compare it with the manufacturer's set value to see if it meets the requirements. When the pressure is increased by pressure application, the nodes other than the start-stop node, that is, the low oil pressure closing lock, low oil pressure opening lock, and low oil pressure reclosing node are initially in an open state. As the oil pressure rises, the node changes from open to closed. During verification, there is no current in these nodes at the beginning, and current is generated at the moment of closing. At this time, the corresponding oil pressure is read and compared with the manufacturer's specified value to achieve verification. The oil pump start / stop node is opposite to the above node. It is in a closed or started state at the beginning. As the oil pressure rises, the node changes from closed to open. When the current is measured by a clamp-type ammeter during verification, there is current at the beginning, and the current disappears at the moment of opening. At this time, the corresponding oil pressure (i.e. the second pressure value) is read and compared with the value specified by the manufacturer to achieve verification.

[0092] When the verification result is determined, it can be displayed to prompt the user of the verification result of the pressure switch. The verification result can include information indicating the normal or abnormal state of each node. When the first node is abnormal, a reminder signal can be sent to the user, such as a buzzer, information prompt, voice prompt, etc.

[0093] The embodiment of the present application also provides an electronic device, Figure 6 A schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present disclosure is shown. Figure 6 The electronic device 600 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0094] like Figure 6 As shown, electronic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage part 608 into a random access memory (RAM) 603. In RAM 603, various programs and data required for system operation are also stored. CPU 601, ROM 602 and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to bus 604.

[0095] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed, so that a computer program read therefrom is installed into the storage section 608 as needed.

[0096] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 609, and / or installed from the removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the above-mentioned functions defined in the embodiment of the present application are executed.

[0097] For example, when the computer program is executed by the central processing unit (CPU) 601, it may be executed as follows:

[0098] During the pressure reduction process of the circuit breaker hydraulic mechanism, the node status of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the first measurement circuit interface; when the node status of each node meets the first preset condition, the first pressure value of the circuit breaker hydraulic mechanism pressure switch is obtained; during the pressure increase process of the circuit breaker hydraulic mechanism, the input current of the target node is obtained through the second measurement circuit interface, and the node status of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the change of the input current, and when the input current and the node status of each node meet the second preset condition, the second pressure value of the circuit breaker hydraulic mechanism pressure switch is obtained; the verification result of the circuit breaker hydraulic mechanism pressure switch is determined by the first pressure value and the second pressure value. .

[0099] It should be noted that the computer-readable medium shown in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0100] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0101] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, and the units described may also be arranged in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0102] As another aspect, the present application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and the one or more programs include instructions, and when the instructions are executed by the electronic device, the electronic device implements the method described in the above embodiment.

[0103] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0104] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A circuit breaker hydraulic mechanism pressure switch calibration device, characterized in that: include: A first measurement loop is used to obtain the node status of each node of the pressure switch of the circuit breaker hydraulic mechanism, wherein the nodes include the target node; A second measurement loop, used to obtain input currents of various nodes of the pressure switch; A programmable controller, connected to the first measurement circuit and the second measurement circuit via a measurement circuit interface, for determining a pressure value of the pressure switch according to the node status of each node and an input current of a target node; and determining a calibration result of the pressure switch according to the pressure value; A human-machine interface, connected to the programmable controller, for displaying the verification result; The first measuring circuit and the second measuring circuit share a measuring circuit interface, and the measuring circuits corresponding to the interface are switched by a programmable controller.

2. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 1, characterized in that: Also includes: The first measuring circuit detection connecting cable has one end connected to the measuring circuit interface and the other end connected to each node on the control cabinet of the pressure switch.

3. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 1, characterized in that: Also includes: The current sensor has an input end located at the target node of the pressure switch and an output end connected to the second measurement loop interface.

4. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 3, characterized in that: The current sensor is a clamp-type DC current sensor, the input end of which is a current clamp, and the current clamp is clamped in the circuit loop corresponding to the target node.

5. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 1, characterized in that: The nodes include the oil pump start and stop node, the reclosing lock node, the closing lock node, and the opening lock node of the pressure switch; the target node is the oil pump start and stop node.

6. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 1, characterized in that: The programmable controller is further used to obtain a first pressure value of the pressure switch when the node state of each node meets a first preset condition, and to obtain a second pressure value of the pressure switch when the input current of the target node and the node state of each node meet a second preset condition; A calibration result of the pressure switch is determined according to the first pressure value and the second pressure value.

7. The circuit breaker hydraulic mechanism pressure switch calibration device according to claim 6, characterized in that: The human-machine interface is also used to input a current determination threshold; The programmable controller determines whether the input current of the target node meets a second preset condition through the current determination threshold.

8. A method for calibrating a pressure switch of a circuit breaker hydraulic mechanism, characterized in that: include: During the pressure reduction process of the circuit breaker hydraulic mechanism, the node status of each node of the circuit breaker hydraulic mechanism pressure switch is obtained through the measurement loop interface, wherein the node includes the target node; When the node state of each node meets the first preset condition, obtaining a first pressure value of the pressure switch; During the pressure boosting process of the circuit breaker hydraulic mechanism, the input current of the target node is obtained through the measurement loop interface, and the node state of each node of the pressure switch is obtained through the change of the input current, and when the input current and the node state of each node meet the second preset condition, the second pressure value of the pressure switch is obtained; The calibration result of the pressure switch is determined by the first pressure value and the second pressure value.

9. The circuit breaker hydraulic mechanism pressure switch calibration method according to claim 8, characterized in that: The node state includes a current state; when the node state of each node satisfies a first preset condition, obtaining a first pressure value of the pressure switch includes: When the current state of the target node changes from no current to current, obtaining a corresponding first pressure value; When the current state of other nodes except the target node changes from current supply to no current supply, the corresponding first pressure value is acquired.

10. The circuit breaker hydraulic mechanism pressure switch calibration method according to claim 9, characterized in that: When the input current and the node states of each node meet a second preset condition, obtaining a second pressure value of the pressure switch includes: When the input current is less than the current determination threshold, obtaining a corresponding second pressure value; When the current state of other nodes except the target node changes from no current to current, the corresponding second pressure value is acquired.

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