Comprehensive early warning system for excitation carbon brush

Abstract

The utility model discloses a comprehensive early warning system for an excitation carbon brush, which comprises a plurality of sampling modules arranged on the excitation carbon brush and a monitoring terminal in data communication connection with the sampling modules. A temperature sensor of the sampling module can be used for collecting temperature information of the excitation carbon brush, an air pressure sensor is matched with the cavity to be used for monitoring whether the excitation carbon brush is worn to a warning position or not, and real-time monitoring of the excitation carbon brush is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to the technical field of an integrated warning system for excitation carbon brushes. Background Art

[0002] Carbon brushes and slip rings are devices for dynamic and static contact and energy exchange of generators, and are important components of the generator excitation system. However, due to many reasons during operation, various problems often occur, such as the carbon brush wear exceeding the warning value, the carbon brush temperature being too high, etc., which seriously endanger the safe operation of the generator. In order to ensure the safe and stable operation of the unit, power plants have strict regulations on the standard maintenance of carbon brushes. Monitoring the remaining amount of carbon brushes and measuring the temperature are very important items in the daily maintenance of carbon brushes.

[0003] For example, the Chinese utility model patent with the patent number CN205748480U proposes an on-line monitoring and warning device for the current and temperature of generator carbon brushes, which includes a main control device, a display output module and at least one carbon brush monitoring unit. The carbon brush monitoring unit includes a microcontroller, an analog-to-digital conversion unit, at least one current sensor and at least one temperature sensor. The microcontroller and the display output module are respectively connected to the main control device. An alarm relay interface is provided on the main control device. The current sensor is connected in series with the circuit of the generator carbon brush, and the temperature sensor is installed in the generator and contacts the carbon brush. The output ends of the current sensor and the temperature sensor are respectively connected to the input end of the microcontroller through the analog-to-digital conversion unit. This utility model can realize real-time collection of the current and temperature of generator carbon brushes, realize real-time on-line monitoring and display of the current and temperature of generator carbon brushes, provide support for the detection and diagnosis of generator carbon brushes, and can realize alarm output and upload when the current or temperature is abnormal, saving a large amount of labor inspection time cost. However, the above device can only monitor the carbon brush temperature and cannot monitor the remaining amount of carbon brushes, and cannot find and send a signal in the first time when the carbon brush wears to the warning value, and cannot comprehensively monitor the carbon brush. Summary of the Invention

[0004] The purpose of the utility model is to solve the problems in the prior art and propose an integrated warning system for excitation carbon brushes, which can monitor the remaining amount of carbon brushes and the carbon brush temperature in real time.

[0005] To achieve the above purpose, the utility model proposes an integrated warning system for excitation carbon brushes, which includes a plurality of sampling modules arranged on the excitation carbon brushes and a monitoring terminal data communicatively connected to the sampling modules. The sampling module includes a monitoring insertion rod. An installation jack adapted to the monitoring insertion rod is provided on the excitation carbon brush. A cavity is provided in the monitoring insertion rod. One end of the monitoring insertion rod away from the excitation carbon brush is provided with a pressure sensor, and one end away from the pressure sensor is provided with a plugging head for plugging the cavity. The detection end of the pressure sensor is communicated with the cavity. The inside of the cavity is in negative pressure or positive pressure. The monitoring terminal is data communicatively connected to the pressure sensor;

[0006] A temperature sensor is further provided on the monitoring insertion rod, and the temperature sensor is communicatively connected to the monitoring terminal for data.

[0007] Preferably, the temperature sensor is a probe-type temperature sensor, and the detection end of the probe-type temperature sensor extends into the cavity.

[0008] Preferably, a vibration sensor is further provided on the monitoring insertion rod, and the vibration sensor is communicatively connected to the monitoring terminal for data.

[0009] Preferably, an installation groove adapted to the temperature sensor is provided on the outer wall of the monitoring insertion rod, and the temperature sensor is arranged in the installation groove and fits against the inner wall of the installation jack.

[0010] Preferably, the plugging head is detachably connected to the monitoring insertion rod, and an air nozzle for injecting air into the cavity or extracting air from the cavity is provided on the plugging head.

[0011] Preferably, a plugging head hollow part communicating with the cavity is provided at one end of the plugging head close to the cavity.

[0012] Preferably, the monitoring terminal includes a central processing unit and a display panel electrically connected to the central processing unit.

[0013] Preferably, a monitoring terminal alarm electrically connected to the central processing unit is further included.

[0014] The beneficial effects of the comprehensive early warning system for excitation carbon brushes of the present utility model: By arranging an installation jack inside the excitation carbon brush and a sampling module inside the installation jack in the present utility model, the temperature sensor of the sampling module can be used to collect the temperature information of the excitation carbon brush, and the air pressure sensor cooperating with the cavity can be used to monitor whether the excitation carbon brush is worn to the warning position, realizing real-time monitoring of the excitation carbon brush. In this embodiment, the inside of the cavity is set to be positive pressure or negative pressure, and the air pressure sensor can monitor the internal pressure value of the cavity in real time, so as to judge whether the excitation carbon brush is worn to the warning position. When the excitation carbon brush is worn to the position of the plugging head, the plugging head will be damaged, so that the cavity leaks air and the internal pressure of the cavity returns to normal. The air pressure sensor senses the air pressure signal and sends the signal to the monitoring terminal, and the monitoring terminal can determine that the excitation carbon brush is worn to the warning position and issue an alarm.

[0015] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the drawings. Description of the Drawings

[0016] Figure 1 It is a module schematic diagram of the comprehensive early warning system for excitation carbon brushes of the present utility model.

[0017] Figure 2 It is a front view structural schematic diagram of the excitation carbon brush and sampling module of the comprehensive warning system for the excitation carbon brush of the present utility model.

[0018] Figure 3 It is a front view sectional structural schematic diagram of the excitation carbon brush and sampling module of the comprehensive warning system for the excitation carbon brush of the present utility model.

[0019] Figure 4 It is a front view sectional structural schematic diagram of the sampling module.

[0020] Figure 5 It is a structural schematic diagram of the sampling module in the second embodiment.

[0021] Wherein:

[0022] 1 - Excitation carbon brush; 2 - Monitoring insertion rod; 3 - Monitoring terminal; 11 - Installation jack; 21 - Cavity; 22 - Air pressure sensor; 23 - Temperature sensor; 24 - Vibration sensor; 25 - Installation groove; 26 - Plugging head; 32 - Central processing unit; 33 - Display panel; 35 - Monitoring terminal alarm. Specific embodiments

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0024] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined. The meaning of "several" is one or more, unless otherwise specifically defined.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment 1

[0027] Refer to Figures 1 - 4, the integrated warning system for the excitation carbon brush of the present utility model includes a sampling module provided on the excitation carbon brush 1 and a monitoring terminal 3 that is data communication-connected to the sampling module. The sampling module includes a monitoring insertion rod 2. An installation jack 11 adapted to the monitoring insertion rod 2 is provided on the excitation carbon brush 1. The monitoring insertion rod 2 is inserted into the installation jack 11. A cavity 21 is provided inside the monitoring insertion rod 2. One end of the monitoring insertion rod 2 away from the excitation carbon brush 1 is provided with a pressure sensor 22, and one end away from the pressure sensor 22 is provided with a plugging head 26 for plugging the cavity 21. The plugging head 26 is set at the wear warning value position of the excitation carbon brush 1, that is, when the excitation carbon brush 1 wears to the position of the plugging head 26, a new excitation carbon brush 1 should be replaced. The pressure sensor 22 is used to monitor the air pressure inside the cavity 21. The detection end of the pressure sensor 22 is communicated with the cavity 21. The inside of the cavity 21 is under positive pressure. The monitoring terminal 3 is data communication-connected to the pressure sensor 22. A temperature sensor 23 is further provided on the monitoring insertion rod 2. The temperature sensor 23 is data communication-connected to the monitoring terminal 3. In this embodiment, an installation jack 11 is provided inside the excitation carbon brush 1, and a sampling module is provided inside the installation jack 11. The temperature sensor 23 of the sampling module can be used to collect the temperature information of the excitation carbon brush 1. The cooperation between the pressure sensor 22 and the cavity 21 can be used to monitor whether the excitation carbon brush 1 wears to the warning position, realizing the real-time monitoring of the excitation carbon brush 1. In this embodiment, the inside of the cavity 21 is set to be under positive pressure. The pressure sensor 22 can monitor the internal pressure value of the cavity 21 in real time, so as to judge whether the excitation carbon brush 1 wears to the warning position. When the excitation carbon brush 1 wears to the position of the plugging head 26, the plugging head 26 will be damaged, so that the cavity 21 leaks air, and the internal pressure of the cavity 21 returns to normal. The pressure sensor 22 senses the air pressure signal and sends the signal to the monitoring terminal 3. The monitoring terminal 3 can determine that the excitation carbon brush 1 wears to the warning position and issue an alarm.

[0028] Preferably, the temperature sensor 23 is a probe-type temperature sensor, and the detection end of the probe-type temperature sensor extends into the cavity 21. Extending the temperature sensor 23 into the cavity 21 can improve the accuracy and directly detect the temperature inside the excitation carbon brush 1.

[0029] Refer to Figure 1 , a vibration sensor 24 is further provided on the monitoring insertion rod 2. The vibration sensor 24 is data communication-connected to the monitoring terminal 3. The vibration sensor 24 is used to monitor the amplitude, vibration intensity, etc. of the excitation carbon brush 1. When the amplitude and vibration intensity are too large, an alarm signal can be sent out in the first time.

[0030] Refer to Figure 3 and Figure 4, the monitoring terminal 3 includes a central processing unit 32, a display panel 33 electrically connected to the central processing unit 32, and a monitoring terminal alarm 35 electrically connected to the central processing unit 32. The central processing unit 32 processes data, the display panel 33 displays data, and the monitoring terminal alarm 35 can issue an alarm signal. Embodiment 2

[0031] Refer to Figure 5 , on the basis of Embodiment 1, an installation groove 25 adapted to the temperature sensor 23 is provided on the outer wall of the monitoring insertion rod 2, and the temperature sensor 23 is arranged in the installation groove 25 and fits against the inner wall of the installation jack 11. The temperature sensor 23 is arranged on the outer wall of the monitoring insertion rod 2 and fits against the installation jack 11, so that it can better monitor the temperature of the excitation carbon brush 1. Embodiment 3

[0032] Refer to Figure 3 and Figure 4 , the plugging head 26 is detachably connected to the monitoring insertion rod 2, and an air nozzle for injecting air into the cavity 21 or extracting the air in the cavity 21 is provided on the plugging head 26. One end of the plugging head 26 close to the cavity 21 is provided with a plugging head hollow part communicating with the cavity 21. The plugging head 26 is detachably arranged, which is convenient for replacement. When the plugging head 26 is worn, the monitoring insertion rod 2 on the excitation carbon brush 1 can be taken out, and then the plugging head 26 is replaced. The air pressure in the cavity 21 is controlled through the air nozzle, and then it is replaced into a new excitation carbon brush 1, so that the sampling module can be reused and the cost is saved.

[0033] The working process of the present utility model:

[0034] During the working process of the excitation carbon brush comprehensive early warning system of the present utility model, the temperature sensor 23 of the sampling module can be used to collect the temperature information of the excitation carbon brush 1, and the air pressure sensor 22 and the cavity 21 cooperate to monitor whether the excitation carbon brush 1 is worn to the warning position. The inside of the cavity 21 is set to be positive pressure or negative pressure, and the air pressure sensor 22 can monitor the internal pressure value of the cavity 21 in real time, so as to judge whether the excitation carbon brush 1 is worn to the warning position. When the excitation carbon brush 1 is worn to the position of the plugging head 26, the plugging head 26 will be damaged, so that the cavity 21 leaks air, and the internal pressure of the cavity 21 returns to normal. The air pressure sensor 22 senses the air pressure signal and sends the signal to the monitoring terminal 3, and the monitoring terminal 3 can determine that the excitation carbon brush 1 is worn to the warning position and issue an alarm.

[0035] The standard parts used in this application document can all be purchased from the market. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The electric slide rail slider, cylinder, welding machine, electric telescopic rod, and internal components of the controller all adopt conventional models in the prior art, and their internal structures belong to the prior art structures. Workers can complete normal operations on them according to the prior art manuals. Coupled with the circuit connection adopting the conventional connection method in the prior art, no specific description will be made here.

[0036] It should be noted that although the above-mentioned embodiments have been described in this article, the patent protection scope of the present utility model is not limited thereby. Therefore, based on the innovative concept of the present utility model, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present utility model.

Claims

1. An excitation carbon brush comprehensive early warning system, comprising a plurality of sampling modules arranged on an excitation carbon brush (1), and a monitoring terminal (3) connected to the sampling modules for data communication, characterized in that: The sampling module comprises a monitoring rod (2), the excitation carbon brush (1) is provided with a mounting socket (11) adapted to the monitoring rod (2), a cavity (21) is provided inside the monitoring rod (2), an air pressure sensor (22) is provided at one end of the monitoring rod (2) away from the excitation carbon brush (1), and a plugging head (26) for plugging the cavity (21) is provided at one end away from the air pressure sensor (22), a detection end of the air pressure sensor (22) is in communication with the cavity (21), the interior of the cavity (21) is at negative pressure or positive pressure, and the monitoring terminal (3) is connected to the air pressure sensor (22) for data communication; The monitoring rod (2) is also provided with a temperature sensor (23), and the temperature sensor (23) is connected to the monitoring terminal (3) for data communication.

2. The comprehensive early warning system for excitation carbon brushes according to claim 1, characterized in that: The temperature sensor (23) is a probe-type temperature sensor, and a detection end of the probe-type temperature sensor extends into the cavity (21).

3. The comprehensive warning system for excitation carbon brushes according to claim 1, characterized in that: The monitoring rod (2) is also provided with a vibration sensor (24), and the vibration sensor (24) is connected to the monitoring terminal (3) for data communication.

4. The comprehensive warning system for excitation carbon brushes according to claim 1 is characterized in that: The outer wall of the monitoring rod (2) is provided with a mounting groove (25) adapted to the temperature sensor (23); the temperature sensor (23) is arranged in the mounting groove (25) and fits against the inner wall of the mounting socket (11).

5. The comprehensive warning system for excitation carbon brushes according to claim 1 is characterized in that: The plugging head (26) is detachably connected to the monitoring plug rod (2), and the plugging head (26) is provided with an air nozzle for injecting air into the cavity (21) or extracting air from the cavity (21).

6. The comprehensive warning system for excitation carbon brushes according to claim 5, characterized in that: A plugging head hollow portion communicating with the cavity (21) is provided at one end of the plugging head (26) close to the cavity (21).

7. The comprehensive warning system for excitation carbon brushes according to claim 1, characterized in that: The monitoring terminal (3) comprises a central processing unit (32) and a display panel (33) electrically connected to the central processing unit (32).

8. The comprehensive warning system for excitation carbon brushes according to claim 7, characterized in that: Also included is an alarm (35) electrically connected to the central processing unit (32).

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