A contactor and a detection method and system for its working state

Abstract

The present invention belongs to the technical field of power supply and distribution, and discloses a contactor and a detection method and system for its working state, including a contactor inherent action mechanism and a state signal detection module. The contactor inherent action mechanism includes a remote control circuit dedicated to remote control, and the state signal detection module specifically includes a remote control signal detection module, an auxiliary contact action detection module, a logic operation module, and a signal transmission module. By detecting the output of the remote control signal and the actual action of the contactor, and performing a logic operation on the two to determine the actual working state of the contactor, the consistency between the operation instructions sent by the instrument control device and the actual action of the contactor is enhanced, so that the instrument control device can obtain the actual working state of the contactor, so that the operator can accurately and timely know the normal switching of the load and the abnormal working state of the contactor, which can reduce the scope of influence after the accident occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply and distribution, and in particular to a contactor and a detection method and system for its working state. Background Art

[0002] In daily industrial production activities, contactors are important switching devices for realizing remote load switching. The correct feedback of their working status can effectively inform operators of the actual switching status of the load. When a short circuit occurs in the power supply circuit, the contactor is disconnected, but the instrumentation and control system still shows that the contactor is closed. Remote operators cannot learn about the accident status in time, which leads to the expansion of the accident scope and seriously affects the normal production work. Since the contactor itself does not have the signal feedback function of the working status, the instrumentation and control equipment cannot obtain the actual working status of the contactor. The operator can only determine whether the switch control signal is issued, but cannot clearly determine whether the electrical equipment is turned on or off.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing contactor does not have the function of feeding back its own working status, resulting in the inability of the instrument control device to obtain the actual working status of the contactor when an accident occurs. The purpose is to provide a contactor and a detection method and system for its working status, by detecting the output of the remote control signal and the actual action of the contactor, and performing logical operations on the two to determine the state feedback of the contactor, thereby enhancing the consistency between the operation instruction and the actual action of the equipment, and realizing that the instrument control system can obtain the actual working status of the contactor.

[0005] The present invention is achieved through the following technical solutions:

[0006] On the one hand, the present invention provides a contactor, including: a contactor inherent action mechanism, which is used to perform corresponding control operations on a power supply circuit according to a remote control signal, and generate a corresponding power supply circuit status signal; perform corresponding control operations on auxiliary contacts according to the remote control signal, and generate corresponding auxiliary contact action signals; a status signal detection and processing mechanism, which is used to detect the charging condition of the power supply circuit according to the power supply circuit status signal, control the magnetism of a first electromagnet according to the detection result of the charging condition, and output a first switching signal according to the magnetism of the first electromagnet; detect the opening and closing condition of the auxiliary contact according to the auxiliary contact action signal, control the magnetism of a second electromagnet according to the detection result of the opening and closing condition, and output a second switching signal according to the magnetism of the second electromagnet; perform logical operations on the first switching signal and the second switching signal, and output the working state of the contactor to the instrument control device.

[0007] Furthermore, the inherent action mechanism of the contactor includes a power supply circuit, a contactor main contact action mechanism and an auxiliary contact connected in sequence, and the power supply circuit includes a coil and an iron core; the status signal detection and processing mechanism includes a remote control signal detection module, an auxiliary contact action detection module, and a logic operation module; the input end of the remote control signal detection module is connected to the output end of the power supply circuit, and the output end of the remote control signal detection module is connected to the input end of the logic operation module; the input end of the auxiliary contact action detection module is connected to the output end of the auxiliary contact, and the output end of the auxiliary contact action detection module is connected to the input end of the logic operation module.

[0008] Furthermore, the status signal detection and processing module also includes a signal transmission module, the input end of the signal transmission module is connected to the output end of the logic operation module; the signal transmission module is used to convert the logic operation result generated by the logic operation module into a corresponding digital dry signal, and send the digital dry signal to the instrument control device.

[0009] Furthermore, the remote control signal detection module includes a first detection circuit, the auxiliary contact action detection module includes a second detection circuit, and the auxiliary contact is connected in series in the first detection circuit.

[0010] Furthermore, the first detection circuit includes a first Hall element and the first electromagnet; the second detection circuit includes a second Hall element and the second electromagnet.

[0011] On the other hand, the present invention provides a method for detecting the working state of a contactor, based on a contactor provided by the present invention, comprising the following steps: sending a remote control signal to the contactor; in the inherent action mechanism of the contactor, controlling the power supply circuit to perform corresponding on-off operations and generate corresponding power supply circuit status signals according to the remote control signal, and controlling the auxiliary contacts to perform corresponding opening and closing operations and generate corresponding auxiliary contact action signals according to the remote control signal; in the status signal detection and processing mechanism, using a remote control signal detection module to detect the charging condition of the power supply circuit according to the power supply circuit status signal, controlling the magnetism of the first electromagnet according to the detection result of the charging condition, and generating a first switching signal according to the magnetism of the first electromagnet; using an auxiliary contact action detection module to detect the opening and closing condition of the auxiliary contact according to the auxiliary contact action signal, controlling the magnetism of the second electromagnet according to the detection result of the opening and closing condition, and generating a second switching signal according to the magnetism of the second electromagnet; performing logical operations on the first switching signal and the second switching signal, and outputting the working state detection result of the contactor to the instrument control device.

[0012] Furthermore, performing a logical operation on the first switch signal and the second switch signal includes: when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is normally closed; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is normally disconnected; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is abnormal; when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is abnormal.

[0013] Furthermore, the present invention provides a method for detecting the working state of a contactor, further comprising the following steps: sending the detection result of the working state of the contactor to the instrument control device by using a signal transmission module.

[0014] Furthermore, before sending to the instrument control device, the following steps are also included: using the signal transmission module to convert the logic operation result generated by the logic operation module into a corresponding digital dry signal.

[0015] On the other hand, the present invention provides a contactor working status detection system, including a contactor provided by the present invention, and also including an instrument control device; the instrument control device is used to send a remote control signal to the contactor, and receive the contactor working status detection result sent by the contactor.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. By detecting the output of the remote control signal and the actual operation of the contactor, and performing logical operations on the two to determine the actual working state of the contactor, the consistency between the operation instructions sent by the instrument control device and the actual operation of the contactor is enhanced, so that the instrument control device can obtain the actual working state of the contactor, so that the operator can accurately and timely know the normal switching of the load and the abnormal working state of the contactor, which can reduce the impact range after the accident.

[0018] 2. By applying Hall elements in the first detection circuit and the second detection circuit respectively, the physical isolation of remote control signal detection, auxiliary contact action signal detection and contactor inherent action mechanism is achieved, which greatly enhances the electrical safety of signal detection and logic operation modules.

[0019] 3. The signal transmission module enables the contactor's status feedback signal to be transmitted remotely, which is convenient for remote monitoring. The signal feedback signal has high accuracy and stable performance.

[0020] 4. The inherent action mechanism of the contactor and the state signal detection and processing mechanism are integrated in the same contactor, realizing the integrated integration of the inherent action mechanism and the state signal detection and processing module. It is easy to install and maintain. The user only needs to perform simple wiring operations to complete the installation and realize the on-off of the power supply circuit and the feedback of the contactor status. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A structural framework diagram of a contactor with a state feedback function provided in Example 1 of the present invention;

[0023] Figure 2 A schematic flow chart of a method for detecting the working status of a contactor provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0025] Example 1

[0026] The existing contactor does not have the function of feedback of its own working status, resulting in the inability of the instrument control device to obtain the actual working status of the contactor when an accident occurs. In order to solve the above technical problems, this embodiment provides a contactor with a state feedback function, which provides a feedback signal of the working status of the contactor by simultaneously detecting the input of the remote control signal and the action of the auxiliary contact of the contactor.

[0027] like Figure 1 As shown, the contactor is composed of a contactor inherent action mechanism and a state signal detection and processing mechanism. The contactor inherent action mechanism is composed of a power supply circuit, a contactor main contact action mechanism and an auxiliary contact connected in sequence, and the power supply circuit includes a coil and an iron core; the state signal detection and processing mechanism is composed of a remote control signal detection module, an auxiliary contact action detection module, a logic operation module and a signal transmission module.

[0028] On the side of the contactor's inherent action structure, the power supply circuit is used to receive the remote control signal sent by the instrument control device in the central control room, and perform the corresponding connection or disconnection operation according to the remote control signal, and at the same time send the generated power supply circuit status signal (power supply circuit connected / power supply circuit disconnected) to the status signal detection and processing mechanism; next, the action of the contactor main contacts drives the action of the auxiliary contacts; finally, the auxiliary contacts perform the corresponding closing or disconnecting operation according to the remote control signal, and at the same time, the generated auxiliary contact action signal (auxiliary contact closed / auxiliary contact disconnected) is sent to the status signal detection and processing mechanism.

[0029] On the side of the status signal detection and processing mechanism, the input end of the remote control signal detection module is connected to the output end of the power supply circuit, and the output end of the remote control signal detection module is connected to the input end of the logic operation module; the input end of the auxiliary contact action detection module is connected to the output end of the auxiliary contact, the output end of the auxiliary contact action detection module is connected to the input end of the logic operation module, and the output end of the logic operation module is connected to the signal transmission module. Among them, the remote control signal detection module includes a first detection circuit, and the auxiliary contact action detection module includes a second detection circuit. Furthermore, the first detection circuit includes a first Hall element and a first electromagnet, and the second detection circuit includes a second Hall element and a second electromagnet. It should be supplemented that the auxiliary contact is connected in series in the first detection circuit.

[0030] The remote control signal detection module receives the power supply circuit status signal sent by the power supply circuit, detects the power supply circuit's charged state according to the power supply circuit status signal, controls the magnetism of the first electromagnet according to the detection result of the charged state, and outputs the first switch signal according to the magnetism of the first electromagnet. It should be noted that the remote control signal detection module of this embodiment adopts a Hall element. When the remote control power supply circuit is connected or disconnected, the electromagnet of the detection circuit in the remote control signal detection module will gain or lose magnetism accordingly, so that the Hall element outputs the corresponding switch signal to clarify whether the control signal is closed or disconnected.

[0031] The auxiliary contact action detection module receives the auxiliary contact action signal sent by the auxiliary contact, detects the opening and closing of the auxiliary contact according to the auxiliary contact action signal, controls the magnetism of the second electromagnet according to the detection result of the opening and closing, and outputs the second switching signal according to the magnetism of the second electromagnet. It should be noted that the auxiliary contact action detection module of this embodiment also uses a Hall element. When the auxiliary contact is closed or opened, the electromagnet of the detection circuit in the auxiliary contact action detection module will gain or lose magnetism accordingly, and the Hall element will output a corresponding switching signal accordingly, thereby clarifying the actual action of the contactor.

[0032] The logic operation module performs a logic operation on the first switch signal and the second switch signal, and outputs the logic operation result to the signal transmission module. Specifically, when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is closed, the logic operation result is that the working state of the contactor is normally closed; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is disconnected, the logic operation result is that the working state of the contactor is normally disconnected; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is closed, the logic operation result is that the working state of the contactor is abnormal; when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is disconnected, the logic operation result is that the working state of the contactor is abnormal.

[0033] The signal transmission module converts the logic operation result generated by the logic operation module into the corresponding digital dry signal, and sends the digital dry signal to the instrument control device. When the remote control signal is consistent with the on-off state of the auxiliary contact, the signal transmission module outputs the corresponding contactor on-off state feedback signal; when the remote control signal is inconsistent with the on-off state of the auxiliary contact, the signal transmission module outputs the contactor abnormal state feedback signal.

[0034] In summary, the contactor provided in this embodiment detects the output of the remote control signal and the actual action of the contactor, and performs a logical operation judgment on the two to determine the actual working state of the contactor, thereby enhancing the consistency between the operation instruction sent by the instrument control device and the actual action of the contactor, so that the instrument control device can obtain the actual working state of the contactor, so that the operator can accurately and timely know the normal switching of the load and the abnormal working state of the contactor, which can reduce the impact range after the accident occurs; by applying Hall elements in the first detection circuit and the second detection circuit respectively, the physical isolation of the remote control signal detection, the auxiliary contact action signal detection and the inherent action mechanism of the contactor is realized, and the electrical safety of the signal detection and logic operation module is greatly enhanced; and the signal transmission module enables the state feedback signal of the contactor to be remotely transmitted, which is convenient for remote monitoring, and the signal feedback single has high accuracy and stable performance. In addition, the inherent action mechanism of the contactor and the state signal detection and processing mechanism are integrated in the same contactor, realizing the integrated integration of the inherent action mechanism and the state signal detection and processing module, which is convenient to install and simple to maintain. The user only needs to perform simple wiring operations to complete the installation, and realize the on-off of the power supply circuit and the feedback of the contactor state.

[0035] Example 2

[0036] Based on the contactor described in Example 1, this embodiment provides a corresponding contactor working state detection method, and the embodiment process is as follows: Figure 2 As shown, the specific steps include:

[0037] Step 1: Send a remote control signal to the contactor.

[0038] Step 2: In the inherent action mechanism of the contactor, the power supply circuit is controlled to perform corresponding on-off operations according to the remote control signal and generate a corresponding power supply circuit status signal, and the auxiliary contacts are controlled to perform corresponding opening and closing operations according to the remote control signal and generate a corresponding auxiliary contact action signal.

[0039] Step 3: In the status signal detection and processing mechanism, a remote control signal detection module is used to detect the power supply circuit's charged state according to the power supply circuit status signal, and the magnetism of the first electromagnet is controlled according to the detection result of the charged state, and a first switching signal is generated according to the magnetism of the first electromagnet; an auxiliary contact action detection module is used to detect the opening and closing state of the auxiliary contact according to the auxiliary contact action signal, and the magnetism of the second electromagnet is controlled according to the detection result of the opening and closing state, and a second switching signal is generated according to the magnetism of the second electromagnet; a logical operation is performed on the first switching signal and the second switching signal, and the working state detection result of the contactor is output to the instrument control device.

[0040] Among them, performing logical operations on the first switch signal and the second switch signal includes: when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is normally closed; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is normally disconnected; when the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is abnormal; when the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is abnormal.

[0041] Step 4: Use the signal transmission module to convert the logic operation result generated by the logic operation module into a corresponding digital dry signal.

[0042] Step 5: The contactor working status detection result is sent to the instrument control device as a corresponding digital dry signal using a signal transmission module.

[0043] Example 3

[0044] This embodiment provides a corresponding contactor working status detection system. In addition to the contactor described in Example 1, the detection system also includes an instrument control device, which is used to send a remote control signal to the contactor and receive the contactor working status detection result sent by the contactor.

[0045] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A contactor, characterized in that: include: The inherent action mechanism of the contactor is used to perform corresponding control operations on the power supply circuit according to the remote control signal and generate a corresponding power supply circuit status signal; Perform corresponding control operations on the auxiliary contacts according to the remote control signal to generate corresponding auxiliary contact action signals; The state signal detection and processing mechanism is used to detect the charged state of the power supply circuit according to the state signal of the power supply circuit, control the magnetism of the first electromagnet according to the detection result of the charged state, and output the first switch signal according to the magnetism of the first electromagnet; detect the opening and closing state of the auxiliary contact according to the auxiliary contact action signal, control the magnetism of the second electromagnet according to the detection result of the opening and closing state, and output the second switch signal according to the magnetism of the second electromagnet; perform logical operation on the first switch signal and the second switch signal, and output the working state of the contactor to the instrument control device; Performing a logic operation on the first switch signal and the second switch signal includes: When the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is normally closed; When the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is normally disconnected; When the first switch signal indicates that the power supply circuit is disconnected and the second switch signal indicates that the auxiliary contact is closed, the logical operation result is that the working state of the contactor is abnormal; When the first switch signal indicates that the power supply circuit is connected and the second switch signal indicates that the auxiliary contact is disconnected, the logical operation result is that the working state of the contactor is abnormal.

2. A contactor according to claim 1, characterized in that: The inherent action mechanism of the contactor includes a power supply circuit, a contactor main contact action mechanism and an auxiliary contact connected in sequence, and the power supply circuit includes a coil and an iron core; the state signal detection and processing mechanism includes a remote control signal detection module, an auxiliary contact action detection module, and a logic operation module; the input end of the remote control signal detection module is connected to the output end of the power supply circuit, and the output end of the remote control signal detection module is connected to the input end of the logic operation module; the input end of the auxiliary contact action detection module is connected to the output end of the auxiliary contact, and the output end of the auxiliary contact action detection module is connected to the input end of the logic operation module.

3. A contactor according to claim 2, characterized in that: The status signal detection and processing module also includes a signal transmission module, the input end of the signal transmission module is connected to the output end of the logic operation module; the signal transmission module is used to convert the logic operation result generated by the logic operation module into a corresponding digital dry signal, and send the digital dry signal to the instrument control device.

4. A contactor according to claim 3, characterized in that: The remote control signal detection module includes a first detection circuit, the auxiliary contact action detection module includes a second detection circuit, and the auxiliary contact is connected in series in the first detection circuit.

5. A contactor according to claim 4, characterized in that: The first detection circuit includes a first Hall element and the first electromagnet; the second detection circuit includes a second Hall element and the second electromagnet.

6. A method for detecting the working state of a contactor, characterized in that: The contactor according to any one of claims 1 to 5 comprises the following steps: Send remote control signal to contactor; In the inherent action mechanism of the contactor, the power supply circuit is controlled to perform corresponding on-off operations according to the remote control signal and generate corresponding power supply circuit status signals, and the auxiliary contacts are controlled to perform corresponding opening and closing operations according to the remote control signal and generate corresponding auxiliary contact action signals; In the status signal detection and processing mechanism, a remote control signal detection module is used to detect the charging condition of the power supply circuit according to the power supply circuit status signal, and the magnetism of the first electromagnet is controlled according to the detection result of the charging condition, and a first switching signal is generated according to the magnetism of the first electromagnet; an auxiliary contact action detection module is used to detect the opening and closing condition of the auxiliary contact according to the auxiliary contact action signal, and the magnetism of the second electromagnet is controlled according to the detection result of the opening and closing condition, and a second switching signal is generated according to the magnetism of the second electromagnet; logical operations are performed on the first switching signal and the second switching signal, and the working status detection result of the contactor is output to the instrument control device.

7. A method for detecting the working state of a contactor according to claim 6, characterized in that: The following steps are also included: The working status detection result of the contactor is sent to the instrument control device using the signal transmission module.

8. A method for detecting the working state of a contactor according to claim 7, characterized in that: Before sending to the instrument control device, the following steps are also included: using the signal transmission module to convert the logic operation result generated by the logic operation module into a corresponding digital dry signal.

9. A contactor working status detection system, characterized in that: The contactor comprises any one of claims 1 to 5, and also comprises an instrument control device; the instrument control device is used to send a remote control signal to the contactor, and receive a working status detection result of the contactor sent by the contactor.

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