Contact state conversion device of gas density relay

Abstract

The utility model relates to the technical field of relays, and provides a gas density relay contact state conversion device, which comprises an input node for acquiring a node output signal of a gas density relay, the input node is connected with a controller, and the controller is provided with an operation panel. The controller is connected with the single-output arithmetic logic circuit through a first switch, the controller is connected with the double-output arithmetic logic circuit through a second switch, and the single-output arithmetic logic circuit and the double-output arithmetic logic circuit are both connected with an output node; an output 1 button, an output 0 button and an output 0amp are arranged on the operation panel; the button 1, the output button 1 and the output button 0 are all connected with the single-output operational logic circuit, and the output is 0amp; and the button 1 is connected with the dual-output arithmetic logic circuit. According to the utility model, the flexible conversion of the contact state of the gas density relay is realized, so as to meet different requirements of application sites.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a contact state conversion device for a gas density relay. Background Technique

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] Monitoring the gas state, especially the state of harmful gases, is an important part of modern industry. Taking SF6 gas as an example, SF6 gas-insulated electrical equipment is widely used in enterprises such as power and industrial and mining, which has promoted the rapid development of the power industry. Ensuring the reliable and safe operation of SF6 gas-insulated electrical equipment is one of the important tasks of the power department. The arc extinguishing characteristics and insulation characteristics of SF6 gas are important guarantees for the safe operation of electrical equipment. If the SF6 gas in the electrical equipment leaks, it will not only cause major safety accidents, but also pollute the ambient air. Therefore, it is very necessary to monitor the working state of SF6 gas in electrical equipment. Currently, the commonly used gas monitoring equipment is a gas density relay, which is used to monitor and control the state of insulating gas in high-voltage and medium-voltage electrical equipment. The gas density relay has a contact signal output function. When gas leakage is detected, the contacts of the gas density relay act and output corresponding alarm and blocking signals, thereby realizing the protection of the safe operation of high-voltage and medium-voltage electrical equipment.

[0004] Under normal circumstances, after the gas density relay is installed and operated on-site, the corresponding contact type (normally open or normally closed) is determined and cannot be modified; if the contact type needs to be modified during operation, there is no other solution except to replace the gas density relay; and replacing the gas density relay has problems such as high risk and long cycle. Summary of the Utility Model

[0005] In order to solve the technical problems existing in the above background technique, the utility model provides a contact state conversion device for a gas density relay, and the utility model realizes the flexible conversion of the contact state of the gas density relay to meet different requirements of the application site.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a contact state conversion device for a gas density relay.

[0008] A contact state conversion device for a gas density relay includes:

[0009] An input node for obtaining the node output signal of a gas density relay, the input node is connected to a controller, an operation panel is provided on the controller, the controller is connected to a single-output operation logic circuit through a first switch, the controller is connected to a dual-output operation logic circuit through a second switch, and both the single-output operation logic circuit and the dual-output operation logic circuit are connected to an output node;

[0010] An output 1 button, an output 0 button, and an output 0&1 button are provided on the operation panel, the output 1 button and the output 0 button are both connected to the single-output operation logic circuit, and the output 0&1 button is connected to the dual-output operation logic circuit.

[0011] Further, the single-output operation logic circuit includes a first branch and a second branch, the first branch is connected to a first output node through a third switch, the second branch is connected to a first NOT gate through a fourth switch, and the first NOT gate is connected to the first output node.

[0012] Further, the dual-output operation logic circuit includes a third branch and a fourth branch, the third branch is directly connected to a second output node, and the fourth branch is connected to a third output node through a second NOT gate.

[0013] Further, the controller is also connected to a battery for supplying power to the controller and the operation panel.

[0014] Further, a switch button is also provided on the operation panel.

[0015] Further, an alarm and a display screen are also provided on the operation panel for alarm and display.

[0016] Further, both the alarm and the display screen are connected to a power supply.

[0017] Further, the node output signal of the gas density relay includes a normally open state and a normally closed state, the normally open state is 0, and the normally closed state is 1.

[0018] Further, a wireless communication module is also provided in the controller for sending information to a terminal or a mobile terminal in the form of a short message.

[0019] Further, when the gas density relay is filled with rated pressure, the node output signal of the gas density relay is in the normally open state.

[0020] Compared with the prior art, the beneficial effects of the present utility model are:

[0021] The present utility model can realize the change of the state of the node output signal, and can increase the number and types of the node output signals. The structure is simple, the installation is convenient, the contact state conversion is flexible, and it has good versatility.

[0022] The utility model can realize the conversion of the logical state of the output signal of the gas density relay node. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0024] Figure 1 It is a structural diagram of the contact state conversion device of the gas density relay shown by the present utility model;

[0025] Figure 2 It is a schematic diagram of a single-output operation logic circuit shown by the present utility model;

[0026] Figure 3 It is a schematic diagram of a dual-output operation logic circuit shown by the present utility model;

[0027] Wherein, 1. Switch button, 2. Output 1 button, 3. Output 0 button, 4. Output 0&1 button, 5. Controller, 6. Display screen, 7. Alarm, 8. First data transmission interface, 9. Second data transmission interface, 10. First switch, 11. Second switch, 12. Third switch, 13. Fourth switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are all illustrative and are intended to provide a further description of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0030] Embodiment 1

[0031] As Figure 1 shown, this embodiment provides a contact state conversion device for a gas density relay, including:

[0032] An input node for obtaining the output signal of the gas density relay node, the input node is connected to the controller 5, an operation panel is provided on the controller 5, the controller 5 is connected to a single-output operation logic circuit through the first switch 10, the controller 5 is connected to a dual-output operation logic circuit through the second switch 11, and both the single-output operation logic circuit and the dual-output operation logic circuit are connected to an output node;

[0033] On the operation panel, there are an output 1 button 2, an output 0 button 3, and an output 0&1 button 4. The output 1 button 2 and the output 0 button 3 are both connected to a single-output operation logic circuit, and the output 0&1 button 4 is connected to a dual-output operation logic circuit.

[0034] Among them, the output signals of the gas density relay nodes include a normally open state and a normally closed state. The normally open state is 0, and the normally closed state is 1.

[0035] Specifically, in the present invention, the signals output by the output 1 button 2 and the output 0 button 3 can both control the closing of the first switch 10. After the first switch 10 is closed, it enters the single-output operation logic circuit. The signal output by the output 0&1 button 4 can control the closing of the second switch 11. After the second switch 11 is closed, it enters the dual-output operation logic circuit.

[0036] In some embodiments, as Figure 2 shown, the single-output operation logic circuit includes a first branch and a second branch. The first branch is connected to the first output node through the third switch 12, and the second branch is connected to the first NOT gate through the fourth switch 13. The first NOT gate is connected to the first output node.

[0037] Specifically, the controller 5 selects to control the closing of the third switch 12 or the fourth switch 13 according to the output signals of the operation button and the gas density relay. When the input of the first branch is 1, the output is also 1; when the input of the first branch is 0, the output is also 0, that is, the output state of the gas density relay is not changed through the first branch; when the input of the second branch is 1, the output is 0, and when the input of the second branch is 0, the output is 1, that is, the output state of the gas density relay can be changed through the second branch. In the single-output operation logic circuit, there is only one output state.

[0038] In the present invention, the judgment logic for selecting to control the closing of the third switch 12 or the fourth switch 13 according to the output signals of the operation button and the gas density relay is implemented by using existing methods, which does not belong to the protection scope of the present invention.

[0039] The present invention uses a single-output operation logic circuit to change the state of the contact output signal, which can convert the gas density relay node signal from a normally open signal to a normally closed signal, or convert the gas density relay node signal from a normally closed signal to a normally open signal.

[0040] In some embodiments, as Figure 3 shown, the dual-output operation logic circuit includes a third branch and a fourth branch. The third branch is directly connected to the second output node, and the fourth branch is connected to the third output node through the second NOT gate.

[0041] Specifically, the third branch and the fourth branch use the same input node. If the input is 1, it passes through the third branch, and 1 is obtained at the second output node and 0 is obtained at the third output node; if the input is 0, it passes through the third branch, and 0 is obtained at the second output node and 1 is obtained at the third output node. Regardless of whether the input of the dual-output operation logic circuit is 0 or 1, there are two outputs, namely 0 and 1.

[0042] The present utility model adopts a dual-output operation logic circuit, which increases the state categories of the output nodes, and can increase the output signal of the gas density relay node from a single signal (normally open or normally closed) to a dual signal, with both normally open output and normally closed output.

[0043] In some embodiments, the controller 5 is also connected to a battery for supplying power to the controller and the operation panel.

[0044] In some embodiments, a switch button 1 is further provided on the operation panel.

[0045] In some embodiments, an alarm 7 and a display screen 6 are further provided on the operation panel for alarm and display. When the gas pressure monitored by the gas density relay drops to a certain level, an alarm will be output.

[0046] In some embodiments, both the alarm 7 and the display screen 6 are connected to a power source.

[0047] In some embodiments, a wireless communication module is further provided in the controller 5 for sending information to a terminal or a mobile terminal in the form of a short message.

[0048] In some embodiments, when the gas density relay is inflated to the rated pressure, the output signal of the gas density relay node is in a normally open state.

[0049] In some embodiments, the gas density relay is connected to the controller through a first data transmission interface 8 on the controller. The controller is respectively connected to a single-output operation logic circuit and a dual-output operation logic circuit through a second data transmission interface 9 on the controller.

[0050] In the present utility model, the controller adopts an existing automatic transfer switch controller, such as the IDEC switch controller of ADEKA, and the related judgment method involved adopts an existing method. The present utility model only protects the specific structure of the gas density relay contact state conversion device.

[0051] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A gas density relay contact state conversion device, characterized in that: include: An input node for obtaining an output signal of a gas density relay node, wherein the input node is connected to a controller, wherein an operation panel is provided on the controller, wherein the controller is connected to a single-output arithmetic logic circuit via a first switch, wherein the controller is connected to a dual-output arithmetic logic circuit via a second switch, wherein both the single-output arithmetic logic circuit and the dual-output arithmetic logic circuit are connected to an output node; The operation panel is provided with an output 1 button, an output 0 button and an output 0&1 button. The output 1 button and the output 0 button are both connected to a single-output arithmetic logic circuit, and the output 0&1 button is connected to a dual-output arithmetic logic circuit.

2. The gas density relay contact state conversion device according to claim 1, characterized in that: The single-output arithmetic logic circuit includes a first branch and a second branch, the first branch is connected to a first output node via a third switch, the second branch is connected to a first NOT gate via a fourth switch, and the first NOT gate is connected to the first output node.

3. The gas density relay contact state conversion device according to claim 1, characterized in that: The dual-output arithmetic logic circuit includes a third branch and a fourth branch, wherein the third branch is directly connected to the second output node, and the fourth branch is connected to the third output node via a second NOT gate.

4. The gas density relay contact state conversion device according to claim 1, characterized in that: The controller is also connected to a battery for supplying power to the controller and the operation panel.

5. The gas density relay contact state conversion device according to claim 1, characterized in that: The operation panel is also provided with a switch button.

6. The gas density relay contact state conversion device according to claim 1, characterized in that: The operation panel is also provided with an alarm and a display screen for alarm and display.

7. The gas density relay contact state conversion device according to claim 6, characterized in that: The alarm and the display screen are both connected to a power source.

8. The gas density relay contact state conversion device according to claim 1, characterized in that: The gas density relay node output signal includes a normally open state and a normally closed state, the normally open state is 0, and the normally closed state is 1.

9. The gas density relay contact state conversion device according to claim 1, characterized in that: The controller is also provided with a wireless communication module for sending information to a terminal or a mobile terminal in the form of a text message.

10. The gas density relay contact state conversion device according to claim 1, characterized in that: When the gas density relay is inflated to the rated pressure, the gas density relay node output signal is in a normally open state.

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