Intelligent monitoring device for protecting hard pressing plate based on voltage comparison

Abstract

The invention provides a protective hard pressing plate intelligent monitoring device based on voltage comparison, and relates to the technical field of circuit breaker state monitoring, the protective hard pressing plate intelligent monitoring device comprises a shell, an upper cover is arranged on the shell, a control circuit board, a display screen and a wiring board are arranged in the shell, the control circuit board is arranged above the wiring board and is connected with the wiring board, and the display screen is connected with the control circuit board. The wiring board is provided with a power conversion module, a voltage detection wiring terminal and a relay wiring terminal. The control circuit board is provided with a display screen. The shell is provided with a first wiring groove used for installing a voltage detection wiring terminal and a second wiring groove used for installing a relay wiring terminal. A first mounting hole is formed in the shell, a second mounting hole is formed in the upper cover, and the shell and the upper cover are connected through the first mounting hole and the second mounting hole. According to the invention, the state of the protection hard strap is judged by acquiring the voltage information of the protection hard strap acquired by the voltage detection wiring terminal.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection, and in particular to an intelligent monitoring device for a protective hard pressure plate based on voltage comparison. Background Art

[0002] With the continuous development of the power system, the proposal of electric energy substitution and clean development strategies has put forward higher requirements for power supply reliability. Relay protection, as the first line of defense of the power system, is an important guarantee for ensuring the safety of the power system. The correct operation of the relay protection pressure plate directly affects the safe and stable operation of the power grid. However, in actual operation, hidden defects such as false operation of the pressure plate caused by abnormal aging of the pressure plate structure and wrong or missed operation of the pressure plate caused by improper operation and maintenance have led to frequent accidents of protection refusal and malfunction, which seriously threatens the safe and reliable operation of the power grid.

[0003] At present, the operation and maintenance of relay protection pressure plates are mostly carried out by manual inspection and verification, which has the risk of misoperation or false connection. In addition, due to the frequent changes in the operation mode of opening and closing the loop, live work, etc., it is necessary to check and confirm the operation and maintenance of the relay protection pressure plate, which leads to heavy operation and maintenance tasks. In addition, due to the remote location of the substation, there are objective reasons such as long distance and low efficiency in the work.

[0004] The current monitoring method adopts a non-contact current detection mode and performs non-contact monitoring through the principle of DC electric field induction, but there are the following problems: 1. To achieve upload, additional sensors, acquisition modules, communication modules, switches, and security substation systems are required, which is costly and cannot be integrated with the substation background and unified scheduling upload; 2. It can only be installed in substations with security systems, and cannot be implemented in substations with low voltage levels; 3. The investment cost is high and there are many auxiliary equipment, which invisibly increases the workload of operation and maintenance. Summary of the invention

[0005] In order to solve the shortcomings of the above-mentioned prior art, the present invention provides an intelligent monitoring device for a protective hard pressure plate based on voltage comparison, which can monitor the number of actions of switches with different voltage levels, different time periods, and different types of action times, thereby avoiding manual transcription of large quantities of data and preventing statistical errors, making data statistics fast and accurate.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides an intelligent monitoring device for protecting a hard pressure plate based on voltage comparison, comprising:

[0008] A housing, wherein an upper cover is arranged on the housing, a control circuit board, a display screen and a wiring board are arranged inside the housing, the control circuit board is arranged above the wiring board and connected to the wiring board, a power conversion module, a voltage detection wiring terminal and a relay wiring terminal are arranged on the wiring board, and a display screen is arranged on the control circuit board;

[0009] The housing is provided with a first wiring groove for installing a voltage detection wiring terminal and a second wiring groove for installing a relay wiring terminal;

[0010] The shell is provided with a first mounting hole, and the upper cover is provided with a second mounting hole, wherein the shell and the upper cover are connected through the first mounting hole and the second mounting hole.

[0011] As a further technical solution of the present invention, an operation panel is arranged on the upper cover, wherein a display screen hole, an operation button hole, a power indicator light hole and a relay indicator light hole are arranged on the operation panel;

[0012] A transparent film is arranged on the display screen hole, the power indicator light hole and the relay indicator light hole, and a key film is arranged on the key indicator light hole.

[0013] As a further technical solution of the present invention, a slot for connecting to a guide rail in a distribution box is provided at the bottom of the shell, and a buckle is provided on the slot.

[0014] As a further technical solution of the present invention, the control circuit board comprises:

[0015] A voltage acquisition module is used to obtain voltage information between the upper end of the pressing plate, the lower end of the pressing plate and the grounding end;

[0016] The control module monitors the input status of the outlet pressure plate according to the received voltage information and pressure plate status information;

[0017] A relay driving module receives control instructions from the control module to control the relay;

[0018] A display driver module, used to drive and control the display content of the display module;

[0019] A button module is used to operate and control the display module;

[0020] A communication module, used to send data to the control module and receive remote control instructions;

[0021] The output ends of the voltage acquisition module and the key module are connected to the control module, the output end of the control module is connected to the display drive module and the relay drive module, the output end of the display drive module is connected to the display screen, the output end of the relay drive module is connected to the relay, and the control module is connected to the communication module.

[0022] As a further technical solution of the present invention, the power conversion module includes a first power conversion module and a second power conversion module, wherein the first power conversion module is a 220V to 12V power conversion module, and the second power conversion module is a 12V to 5V power conversion module.

[0023] As a further technical solution of the present invention, the voltage acquisition module is provided with four voltage detection circuits, wherein each voltage detection circuit includes a first voltage-dividing resistor, a second voltage-dividing resistor and a first capacitor, the first end of the first voltage-dividing resistor is connected to the voltage detection terminal, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, the first capacitor is connected in parallel to the second voltage-dividing resistor, and the second end of the second voltage-dividing resistor is grounded; the second end of the first voltage-dividing resistor is connected to the control module.

[0024] As a further technical solution of the present invention, four groups of relay driving modules are arranged, wherein each group of relay driving modules comprises: an optocoupler isolator, a transistor and a voltage regulator; the output end of the optocoupler isolator is connected to the base of the transistor through a current limiting resistor, the relay of the transistor is connected to the voltage regulator, and the two ends of the voltage regulator are connected in parallel with the relay.

[0025] As a further technical solution of the present invention, the control module adopts a microprocessor of the STC8H3K64S4LQLFP48 model.

[0026] As a further technical solution of the present invention, the display driver module adopts a TM1650 driver.

[0027] As a further technical solution of the present invention, the communication module adopts a data transceiver of the SP485 model.

[0028] The present invention has the following beneficial effects compared with the prior art:

[0029] 1. The intelligent monitoring device for the protective hard pressure plate based on voltage comparison provided by the present invention has a shell that plays a supporting and protective role. A voltage detection terminal is arranged on the shell to obtain the voltage value of the upper and lower ends of the protective hard pressure plate. The protective hard pressure plate is monitored by judging the difference between the upper and lower ends of the protective hard pressure plate. A relay terminal is arranged on the shell to control the relay. A control circuit board is arranged inside the shell to judge the state of the protective hard pressure plate by obtaining the voltage information of the protective hard pressure plate obtained by the voltage detection terminal, and output a relay control signal.

[0030] 2. A wiring board is also provided inside the housing, and the control circuit board is connected to the voltage detection terminal and the relay terminal through the wiring board; a power conversion module is provided on the wiring board, and the control circuit board is powered by the power conversion module. The double-layer design of the control circuit board and the wiring board is adopted to reduce the volume of the device and facilitate installation in the distribution box;

[0031] 3. The first wiring groove and the second wiring groove are provided on the housing to facilitate the installation of the voltage detection terminal and the relay terminal, and also facilitate wiring;

[0032] 4. The operation panel is set to facilitate the operator to perform setting operations. The voltage difference threshold of each channel can be set through the operation button. When the monitored voltage difference is greater than the set voltage difference threshold, the relay can be controlled to operate and sound and light prompts can be given;

[0033] 5. The display screen hole, power indicator light hole and relay indicator light hole on the operation panel are sealed and protected by transparent films without affecting viewing; the key film is made of rubber film to facilitate the operation of the keys.

[0034] 6. In order to facilitate installation on the guide rail inside the distribution box, a card slot for connecting to the guide rail inside the distribution box is set at the bottom of the shell, and a buckle is set on the card slot. The card slot is embedded in the guide rail of the distribution box, and the sliding buckle is fixed to the guide rail.

[0035] 7. The voltage acquisition module of the present invention obtains the voltage information of the upper and lower ends of the protective hard pressure plate, and determines whether the protective hard pressure plate is in good contact by calculating the voltage difference between the upper and lower ends. When the monitored voltage difference is less than the set voltage threshold, it is judged that the contact is good. When the voltage difference is greater than the set voltage threshold, it is judged as a fault, a prompt message is issued, and the fault information is uploaded through the communication module. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 This is a structural diagram of the intelligent monitoring device for protecting hard pressure plates based on voltage comparison proposed by the present invention;

[0038] Figure 2 This is a front view of the intelligent monitoring device for protecting hard pressure plates based on voltage comparison proposed by the present invention;

[0039] Figure 3 This is a rear view of the intelligent monitoring device for protecting hard pressure plates based on voltage comparison proposed by the present invention;

[0040] Figure 4 This is a circuit diagram of the intelligent monitoring device for protecting hard pressure plates based on voltage comparison proposed by the present invention;

[0041] Figure 5 This is a structural diagram of the control circuit board proposed by the present invention;

[0042] Figure 6A structural diagram of the connecting plate proposed by the present invention;

[0043] Figure 7 This is a circuit diagram of the power conversion module proposed by the present invention;

[0044] Figure 8 This is a circuit structure diagram of the voltage acquisition module proposed by the present invention;

[0045] Fig. 9 This is a circuit diagram of the control module proposed by the present invention;

[0046] Fig.10 A circuit diagram of a relay control module proposed in the present invention;

[0047] Fig.11 This is a circuit diagram of the communication module proposed by the present invention;

[0048] Fig.12 This is a diagram of the peripheral circuit structure of the control module proposed by the present invention;

[0049] As shown in the figure:

[0050] 1-housing, 2-upper cover, 3-control circuit board, 4-display screen, 5-connection board, 6-power conversion module, 7-voltage detection terminal, 8-relay terminal;

[0051] 101-first wiring groove, 102-second wiring groove; 103-first mounting hole, 104-card slot, 105-card buckle;

[0052] 201-second mounting hole, 202-operation panel, 203-display hole, 204-operation button hole, 205-power indicator light hole, 206-relay indicator light hole;

[0053] 301-voltage acquisition module, 302-control module, 303-relay drive module, 304-display drive module, 305-button module, 306-communication module;

[0054] 601-a first power conversion module, 602-a second power conversion module. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be understood that the specific embodiments described are only used to explain the present application and are not used to limit the present application.

[0056] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0057] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0058] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0059] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0060] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0061] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0062] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] like Figures 1 to 6 As shown, the present invention provides an intelligent monitoring device for protecting a hard pressure plate based on voltage comparison, comprising:

[0064] A housing 1, wherein an upper cover 2 is disposed on the housing 1, a control circuit board 3, a display screen 4 and a wiring board 5 are disposed inside the housing 1, wherein the control circuit board 3 is disposed above the wiring board 5 and connected to the wiring board 5, a power conversion module 6, a voltage detection wiring terminal 7 and a relay wiring terminal 8 are disposed on the wiring board 5, and a display screen 4 is disposed on the control circuit board 3;

[0065] The housing 1 is provided with a first wiring groove 101 for installing the voltage detection wiring terminal 7 and a second wiring groove 102 for installing the relay wiring terminal 8;

[0066] The housing 1 is provided with a first mounting hole 103 , and the upper cover 2 is provided with a second mounting hole 201 , wherein the housing 1 and the upper cover 2 are connected via the first mounting hole 103 and the second mounting hole 201 .

[0067] The intelligent monitoring device for a protective hard pressure plate based on voltage comparison provided by the present invention has a shell that plays a supporting and protective role. A voltage detection terminal is arranged on the shell to obtain the voltage value at the upper end and the lower end of the protective hard pressure plate. The protective hard pressure plate is monitored by judging the difference between the upper end and the lower end of the protective hard pressure plate. A relay terminal is arranged on the shell to control the relay. A control circuit board is arranged inside the shell to judge the state of the protective hard pressure plate by obtaining the voltage information of the protective hard pressure plate obtained by the voltage detection terminal, and output a relay control signal.

[0068] A wiring board is also arranged inside the shell, and the control circuit board is connected to the voltage detection terminal and the relay terminal through the wiring board; a power conversion module is arranged on the wiring board, and the control circuit board is powered by the power conversion module. A double-layer design of the control circuit board and the wiring board is adopted to reduce the volume of the device and facilitate installation in the distribution box. A first wiring groove and a second wiring groove are arranged on the shell to facilitate the installation of the voltage detection terminal and the relay terminal, and also facilitate wiring; the shell is buckled and connected with the upper cover by bolts, and a mounting platform is also arranged on the side of the shell, and mounting holes are arranged on the mounting platform to facilitate the installation of the shell and other equipment.

[0069] In the embodiment of the present invention, an operation panel 202 is provided on the upper cover 2, wherein a display screen hole 203, an operation button hole 204, a power indicator light hole 205 and a relay indicator light hole 206 are provided on the operation panel 202; a transparent film is provided on the display screen hole 203, the power indicator light hole 205 and the relay indicator light hole 206, and a key film is provided on the key indicator light hole 204.

[0070] By setting up the operation panel, it is convenient for operators to perform setting operations. The voltage difference threshold of each channel can be set through the operation button. When the monitored voltage difference is greater than the set voltage difference threshold, the relay can be controlled to operate and sound and light prompts can be given; the display hole, power indicator hole, and relay indicator hole on the operation panel are sealed and protected by a transparent film without affecting viewing; the button film is made of rubber film, which is convenient for button operation.

[0071] In order to facilitate installation on the guide rail inside the distribution box, a slot 104 for connecting to the guide rail inside the distribution box is provided at the bottom of the shell 1, and a buckle 105 is provided on the slot 104. The slot is embedded in the guide rail of the distribution box, and the sliding buckle is fixed to the guide rail.

[0072] See also Figure 4 In the embodiment of the present invention, the control circuit board 3 includes:

[0073] The voltage acquisition module 301 is used to obtain the voltage information between the upper end of the pressing plate, the lower end of the pressing plate and the grounding end;

[0074] The control module 302 monitors the input state of the outlet pressure plate according to the received voltage information and pressure plate state information;

[0075] The relay driving module 303 receives the control instruction of the control module to control the relay;

[0076] A display driver module 304, used to drive and control the display content of the display module;

[0077] A button module 305 is used to operate and control the display module;

[0078] The communication module 306 is used to send data to the control module and receive remote control instructions;

[0079] The output ends of the voltage acquisition module and the key module are connected to the control module, the output end of the control module is connected to the display drive module and the relay drive module, the output end of the display drive module is connected to the display screen, the output end of the relay drive module is connected to the relay, and the control module is connected to the communication module.

[0080] See also Figure 7 The power conversion module 6 in the present invention includes a first power conversion module 601 and a second power conversion module 602, wherein the first power conversion module is a 220V to 12V power conversion module, and the second power conversion module is a 12V to 5V power conversion module.

[0081] See also Figure 8 In the embodiment of the present invention, the voltage acquisition module 301 is provided with four voltage detection circuits, wherein each voltage detection circuit includes a first voltage-dividing resistor, a second voltage-dividing resistor and a first capacitor, the first end of the first voltage-dividing resistor is connected to the voltage detection terminal, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, the first capacitor is connected in parallel to the second voltage-dividing resistor, and the second end of the second voltage-dividing resistor is grounded; the second end of the first voltage-dividing resistor is connected to the control module.

[0082] The voltage acquisition module obtains the voltage information of the upper and lower ends of the protective hard pressure plate, and determines whether the protective hard pressure plate is in good contact by calculating the voltage difference between the upper and lower ends. When the monitored voltage difference is less than the set voltage threshold, it is judged to be in good contact. When the voltage difference is greater than the set voltage threshold, it is judged to be a fault, a prompt message is issued, and the fault information is uploaded through the communication module.

[0083] See also Figures 9 to 12 In the embodiment of the present invention, four groups of relay driving modules 303 are provided, wherein each group of relay driving modules includes: an optocoupler isolator, a transistor and a voltage regulator; the output end of the optocoupler isolator is connected to the base of the transistor through a current limiting resistor, the relay of the transistor is connected to the voltage regulator, and the two ends of the voltage regulator are connected in parallel with the relay. The conduction and cutoff of the optocoupler relay are controlled by the on-off of the transistor. Among them, the control module 302 adopts a microprocessor of the STC8H3K64S4 LQLFP48 model, the display driving module 304 adopts a TM1650 driver, and the communication module 306 adopts a data transceiver of the SP485 model.

[0084] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intelligent monitoring device for protecting hard pressure plates based on voltage comparison, characterized in that: The invention comprises: a housing, an upper cover is arranged on the housing, a control circuit board, a display screen and a wiring board are arranged inside the housing, the control circuit board is arranged above the wiring board and connected to the wiring board, a power conversion module, a voltage detection wiring terminal and a relay wiring terminal are arranged on the wiring board, and a display screen is arranged on the control circuit board; The housing is provided with a first wiring groove for installing a voltage detection wiring terminal and a second wiring groove for installing a relay wiring terminal; The shell is provided with a first mounting hole, and the upper cover is provided with a second mounting hole, wherein the shell and the upper cover are connected through the first mounting hole and the second mounting hole.

2. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 1 is characterized in that: An operation panel is arranged on the upper cover, wherein a display screen hole, an operation button hole, a power indicator light hole and a relay indicator light hole are arranged on the operation panel; a transparent film is arranged on the display screen hole, the power indicator light hole and the relay indicator light hole, and a key film is arranged on the key indicator light hole.

3. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 1 is characterized in that: The bottom of the shell is provided with a slot for connecting with the guide rail in the distribution box, and a buckle is provided on the slot.

4. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 1 is characterized in that: The control circuit board comprises: A voltage acquisition module is used to obtain voltage information between the upper end of the pressing plate, the lower end of the pressing plate and the grounding end; The control module monitors the input status of the outlet pressure plate according to the received voltage information and pressure plate status information; A relay driving module receives control instructions from the control module to control the relay; A display driver module, used to drive and control the display content of the display module; A button module is used to operate and control the display module; A communication module, used to send data to the control module and receive remote control instructions; The output ends of the voltage acquisition module and the key module are connected to the control module, the output end of the control module is connected to the display drive module and the relay drive module, the output end of the display drive module is connected to the display screen, the output end of the relay drive module is connected to the relay, and the control module is connected to the communication module.

5. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 1 is characterized in that: The power conversion module includes a first power conversion module and a second power conversion module, wherein the first power conversion module is a 220V to 12V power conversion module, and the second power conversion module is a 12V to 5V power conversion module.

6. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 4 is characterized in that: The voltage acquisition module is provided with four voltage detection circuits, wherein each voltage detection circuit includes a first voltage-dividing resistor, a second voltage-dividing resistor and a first capacitor, the first end of the first voltage-dividing resistor is connected to the voltage detection terminal, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, the first capacitor is connected in parallel to the second voltage-dividing resistor, and the second end of the second voltage-dividing resistor is grounded; the second end of the first voltage-dividing resistor is connected to the control module.

7. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 4 is characterized in that: The relay driving modules are arranged in four groups, wherein each group of the relay driving modules comprises: an optocoupler isolator, a transistor and a voltage regulator; the output end of the optocoupler isolator is connected to the base of the transistor through a current limiting resistor, the relay of the transistor is connected to the voltage regulator, and the two ends of the voltage regulator are connected in parallel with the relay.

8. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 4 is characterized in that: The control module adopts a microprocessor of the STC8H3K64S4 LQLFP48 model.

9. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 4 is characterized in that: The display driver module adopts TM1650 driver.

10. The intelligent monitoring device for protecting hard pressure plate based on voltage comparison according to claim 4 is characterized in that: The communication module adopts a data transceiver of the SP485 model.

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