Thermal power plant field bus communication fault rapid diagnosis device

Abstract

The utility model discloses a thermal power plant field bus communication fault rapid diagnosis device which comprises a self-checking module and a communication diagnosis module, the self-checking module is used for self-testing the device before use, and the communication diagnosis module is used for detecting the working voltage of a communication loop of field bus equipment and diagnosing the working voltage of the communication loop of the field bus equipment. The self-checking module and the communication diagnosis module share one fuse, the communication diagnosis module is connected with field bus equipment through an external test lead, after a power-on button is inching, if the fuse is normal, a self-checking indicating lamp emits light, self-checking is normal, then the test button is inching, a self-checking module circuit is disconnected, and a communication diagnosis module circuit is connected, and if communication voltage is normal, the self-checking indicating lamp emits light. The relay coil is electrified, the communication indicating lamp emits light, and communication is normal. The device has the beneficial effects of simple structure, convenience in use, rapidness and reliability, and is a reliable device for improving the rapid diagnosis efficiency of communication faults of the field bus of the thermal power plant.

Description

Technical Field

[0001] The utility model relates to the field bus communication fault diagnosis work of a thermal power plant and other work of low voltage diagnosis communication. Background Art

[0002] The fieldbus communication technology of thermal power plants has the characteristics of full digital, high precision, and multi-variable transmission. It can connect various types of equipment such as transmitters and actuators. However, the fieldbus communication work is easily affected by strong electromagnetic interference, poor contact of the shielding layer, and failure of other equipment on the same line. Failures occur frequently. The existing fieldbus communication fault diagnosis requires detection personnel to observe the changes in the communication voltage to determine whether the communication is normal, which is cumbersome and needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a rapid diagnosis device for field bus communication faults in a thermal power plant to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A thermal power plant field bus communication fault rapid diagnosis device, comprising:

[0006] The self-test module is used to perform a self-test on the device before use. The self-test indicator light is used to determine whether the device's fuse is normal and whether the communication diagnosis work can be carried out normally. Press the power button. If the fuse is normal, the self-test module circuit is turned on, the self-test indicator light is on, and the self-test is normal.

[0007] The communication diagnosis module is used to detect the working voltage of the communication circuit of the fieldbus device. It determines whether the communication of the fieldbus device is normal according to whether the normal communication indicator light is on. Press the test button, the self-test module circuit is disconnected, and the communication diagnosis module circuit is connected. If the communication voltage is normal, the relay coil is energized, the relay normally open contact is closed, the normal communication indicator light is on, and the communication is normal. If the communication voltage is abnormal, the relay coil is not energized, the relay normally open contact is disconnected, the normal communication indicator light is off, and the communication abnormality is quickly diagnosed.

[0008] The self-test module and the communication diagnosis module share a fuse. After pressing the power button and then the test button, the self-test module circuit is disconnected and the communication diagnosis module circuit is connected.

[0009] As a further solution of the present invention: the self-test module includes a battery, a power button, a fuse, a test button, a normally closed contact of the test button, a self-test indicator light, and a number of internal connecting wires. The test button has a pair of normally closed contacts of the test button. When the test button is pressed, the normally closed contacts of the test button are disconnected, the battery pole is connected to one end of the power button, the other end of the power button is connected to one end of the fuse, the other end of the fuse is connected to one end of the normally closed contact of the test button, the other end of the normally closed contact of the test button is connected to one end of the self-test indicator light, and the other end of the self-test indicator light is connected to the negative pole of the battery.

[0010] As a further scheme of the present invention: the communication diagnosis module includes a relay coil, a relay normally open contact, a fuse, a test button, a test button normally open contact, a communication normal indicator light, an external test wire 1, an external test wire 2, and a number of internal connecting wires. The test button has a pair of test button normally open contacts. When the test button is pressed, the test button normally open contacts are closed. When the relay coil is energized, the relay normally open contacts are closed. One end of the fuse is connected to the external test wire 1, and the other end of the fuse is connected to one end of the test button normally open contact. The other end of the test button normally open contact is connected to one end of the relay coil, and the other end of the relay coil is connected to the external test wire 2. One end of the relay normally open contact is connected to the external test wire 1, and the other end of the relay normally open contact is connected to one end of the communication normal indicator light. The other end of the communication normal indicator light is connected to the external test wire 2. The external test wire 1 is connected to the positive pole of the current bus device, and the external test wire 2 is connected to the negative pole of the current bus device.

[0011] Compared with the prior art, the utility model has the following beneficial effects: simple structure, easy use, fast and reliable. The present invention designs a self-test module for performing a self-test on the device before use. After pressing the power button, if the insurance is normal, the self-test module circuit is turned on, the self-test indicator light is on, and the self-test is normal. A communication diagnosis module is designed for detecting the working voltage of the communication circuit of the field bus equipment. After pressing the test button, if the communication voltage is normal, the relay coil is energized, the normally open contact of the relay is closed, the communication normal indicator light is on, and the communication is normal. The utility model is a reliable device for improving the efficiency of rapid diagnosis of field bus communication faults in thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The present invention is a schematic diagram of a rapid diagnosis device for field bus communication faults in a thermal power plant.

[0014] Figure 2 It is the circuit diagram of the self-test module.

[0015] Figure 3 This is the circuit diagram of the communication diagnostic module.

[0016] Figure 4 The present invention is a general circuit diagram of a rapid diagnosis device for field bus communication faults in a thermal power plant.

[0017] In the figure:

[0018] 1. Self-test module 2. Communication diagnostic module 3. Fieldbus device E. Battery ST1. Power button ST2. Test button ST21. Test button normally closed contact ST22. Test button normally open contact FU. Fuse K. Relay coil K1. Relay normally open contact D1. Self-test indicator D2. Communication normal indicator AA. External test wire 1 BB. External test wire 2 DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model belong to the scope of protection of the utility model.

[0020] See also Figure 1 , a thermal power plant field bus communication fault rapid diagnosis device, comprising:

[0021] Self-test module 1 is used to perform self-test on the device before use. According to whether the self-test indicator light is on, it is judged whether the insurance of the device is normal and whether the communication diagnosis work can be carried out normally. Press the power button. If the insurance is normal, the self-test module circuit is turned on, the self-test indicator light is on, and the self-test is normal;

[0022] Communication diagnostic module 2 is used to detect the working voltage of the communication circuit of the field bus device. It determines whether the communication of the field bus device is normal according to whether the communication normal indicator light is on. When the test button is pressed, the circuit of the self-test module is disconnected and the circuit of the communication diagnostic module is turned on. If the communication voltage is normal, the relay coil is energized, the normally open contact of the relay is closed, the communication normal indicator light is on, and the communication is normal.

[0023] The self-test module 1 and the communication diagnosis module 2 share a fuse. After pressing the power button, and then pressing the test button, the self-test module circuit is disconnected and the communication diagnosis module circuit is connected.

[0024] In this example: See Figure 2The self-test module includes a battery, a power button, a fuse, a test button, a normally closed contact of the test button, a self-test indicator light, and a number of internal connecting wires. The test button (ST2) has a pair of normally closed contacts of the test button (ST21). When the test button (ST2) is pressed, the normally closed contact of the test button (ST21) is disconnected, the positive electrode of the battery (E) is connected to one end of the power button (ST1), the other end of the power button (ST1) is connected to one end of the fuse (FU), the other end of the fuse (FU) is connected to one end of the normally closed contact of the test button (ST21), the other end of the normally closed contact of the test button (ST21) is connected to one end of the self-test indicator light (D1), and the other end of the self-test indicator light (D1) is connected to the negative electrode of the battery (E).

[0025] By taking a specific example, after pressing the power button (ST1), if the fuse (FU) is normal, the self-test module circuit is turned on, the battery (E) supplies power to the self-test indicator light (D1), the self-test indicator light (D1) is illuminated, the self-test is normal, and the device can be used for field bus communication testing; after pressing the power button (ST1), if the fuse (FU) fails, the circuit is not turned on, the battery (E) cannot supply power to the self-test indicator light (D1), the self-test indicator light (D1) is not illuminated, the self-test is abnormal, and the device cannot be used for field bus communication testing.

[0026] In this example: See Figure 3 The communication diagnosis module includes a relay coil, a relay normally open contact, a fuse, a test button, a test button normally open contact, a communication normal indicator light, an external test wire 1, an external test wire 2, and a plurality of internal connecting wires. The test button (ST2) has a pair of test button normally open contacts (ST22). When the test button (ST2) is pressed, the test button normally open contact (ST22) is closed. When the relay coil (K) is energized, the relay normally open contact (K1) is closed. One end of the fuse (FU) is connected to the external test wire 1 (AA), and the other end of the fuse (FU) is connected to the test button normally open contact (ST22). T22), the other end of the test button normally open contact (ST22) is connected to one end of the relay coil (K), the other end of the relay coil (K) is connected to the external test wire 2 (BB), one end of the relay normally open contact (K1) is connected to the external test wire 1 (AA), the other end of the relay normally open contact (K1) is connected to one end of the communication normal indicator light (D2), the other end of the communication normal indicator light (D2) is connected to the external test wire 2 (BB), the external test wire 1 (AA) is connected to the positive pole of the field bus device (3), and the external test wire 2 (BB) is connected to the negative pole of the field bus device (3).

[0027] A specific example is given, wherein the communication diagnosis module is connected to the field bus device (3) using an external test wire 1 (AA) and an external test wire 2 (BB). After the test button (ST2) is pressed, the normally open contact (ST22) of the test button is closed. If the communication is normal, the relay coil (K) is energized, and then the normally open contact (K1) of the relay is closed. The field bus device (3) supplies power to the normal communication indicator (D2), and the normal communication indicator (D2) illuminates, indicating that the field bus communication is normal. If the communication fails, after the test button (ST2) is pressed, although the normally open contact (ST22) of the test button is closed, because the communication voltage of the field bus device (3) is insufficient to energize the relay coil (K), the normally open contact (K1) of the relay cannot be closed, and the normal communication indicator (D2) is de-energized and cannot illuminate, indicating a communication failure.

[0028] The working principle of the utility model is as follows: a self-test module 1 is used to perform a self-test on the device before use, and whether the insurance of the device is normal is judged according to whether the self-test indicator light is on; a communication diagnosis module 2 is used to detect the working voltage of the communication circuit of the field bus device, and whether the communication of the field bus device is normal is judged according to whether the normal communication indicator light is on; the self-test module 1 and the communication diagnosis module 2 share a insurance, after pressing the power button, and then pressing the test button, the circuit of the self-test module is disconnected, and the circuit of the communication diagnosis module is connected; an external test lead is used to connect the communication diagnosis module 2 with the field bus device 3, and the power button is pressed, if the insurance is normal, the self-test indicator light is on, and then the test button is pressed, the circuit of the self-test module is disconnected, and the circuit of the communication diagnosis module is connected, and if the communication voltage is normal, the communication indicator light is on.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view.

[0030] 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. A rapid diagnosis device for field bus communication faults in thermal power plants. It is characterized in that The field bus communication fault rapid diagnosis device comprises: A self-test module (1) is used to perform a self-test on the device before use. By judging whether the self-test indicator light is on, it is judged whether the fuse of the device is normal and whether the communication diagnosis work can be carried out normally. By pressing the power button, if the fuse is normal, the self-test module circuit is turned on, the self-test indicator light is on, and the self-test is normal. The communication diagnosis module (2) is used to detect the working voltage of the communication circuit of the field bus device, and judge whether the communication of the field bus device is normal according to whether the communication normal indicator light is on. When the test button is pressed, the circuit of the self-check module is disconnected and the circuit of the communication diagnosis module is connected. If the communication voltage is normal, the relay coil is energized, the normally open contact of the relay is closed, the communication normal indicator light is on, and the communication is normal. The self-check module (1) and the communication diagnosis module (2) share a fuse. After the power button is pressed, the test button is pressed, the circuit of the self-check module is disconnected, and the circuit of the communication diagnosis module is connected.

2. A thermal power plant field bus communication fault rapid diagnosis device according to claim 1, It is characterized in that The self-test module comprises a battery, a power button, a fuse, a test button, a normally closed contact of the test button, a self-test indicator light, and a plurality of internal connecting wires. The test button (ST2) has a pair of normally closed contacts of the test button (ST21). When the test button (ST2) is pressed, the normally closed contacts of the test button (ST21) are disconnected, the positive pole of the battery (E) is connected to one end of the power button (ST1), the other end of the power button (ST1) is connected to one end of the fuse (FU), the other end of the fuse (FU) is connected to one end of the normally closed contact of the test button (ST21), the other end of the normally closed contact of the test button (ST21) is connected to one end of the self-test indicator light (D1), and the other end of the self-test indicator light (D1) is connected to the negative pole of the battery (E).

3. A thermal power plant field bus communication fault rapid diagnosis device according to claim 1, It is characterized in that The communication diagnosis module includes a relay coil, a relay normally open contact, a fuse, a test button, a test button normally open contact, a communication normal indicator light, an external test wire 1, an external test wire 2, and a plurality of internal connecting wires. The test button (ST2) has a pair of test button normally open contacts (ST22). When the test button (ST2) is pressed, the test button normally open contacts (ST22) are closed. When the relay coil (K) is energized, the relay normally open contacts (K1) are closed. One end of the fuse (FU) is connected to the external test wire 1 (AA), and the other end of the fuse (FU) is connected to the test button normally open contacts (ST22). 22), the other end of the test button normally open contact (ST22) is connected to one end of the relay coil (K), the other end of the relay coil (K) is connected to the external test wire 2 (BB), one end of the relay normally open contact (K1) is connected to the external test wire 1 (AA), the other end of the relay normally open contact (K1) is connected to one end of the communication normal indicator light (D2), the other end of the communication normal indicator light (D2) is connected to the external test wire 2 (BB), the external test wire 1 (AA) is connected to the positive pole of the field bus device (3), and the external test wire 2 (BB) is connected to the negative pole of the field bus device (3).

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