Low-voltage motor life cycle timing system

Abstract

The utility model relates to the technical field of motor maintenance, in particular to a low-voltage motor life cycle timing system, which comprises a main motor connected to a control loop and used for intermittent operation of a part of thermal power plants. The control loop comprises three groups of thermal relay modules, three groups of main contactor modules, three groups of first fuse modules, three groups of second fuse modules, a multi-channel timer module and a warning lamp; the thermal relay module, the main contactor module and the first fuse module are sequentially connected to a phase line of the main motor; and the multi-channel timer module and the warning lamp are connected to the main contactor module in parallel. In a belt speed reducer oil pump cooling motor control loop of a coal conveying system of a thermal power plant, a multi-channel timer module and a warning lamp are merged into a main contactor module of a local control cabinet, the working time is set to be 1500 hours, and after the set time limit is reached, the warning lamp is constant, and the warning lamp is in a constant state. And a worker is reminded to regularly check and replace a bearing and an oil seal part in the motor, and timing is carried out again after checking is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor overhauling technical field, concretely relates to a low voltage motor life cycle timing system. BACKGROUND

[0002] At present, the part low voltage motor of part thermal power plant of coal conveying area is intermittent operation, and the current signal is not connected in DCS, which adopts artificial inspection mode, and carries out approximate estimation according to daily operation time, and the overhaul time is judged and roughly calculated according to experience, is relatively inaccurate, and the management of low voltage motor is extensive, thereby leading to the service life being difficult to calculate, and the service life of bearing, oil seal etc. in motor is the main factor restricting the service life of motor, so the timing system of motor is proposed.

[0003] The above content is only used to assist understanding the technical scheme of the present application, and does not represent admitting the above content is the closest prior art. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of low voltage motor life cycle timing systems to solve the above-mentioned shortage.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme: a low voltage motor life cycle timing system, including the main motor for part thermal power plant intermittent operation being set on coal conveying area and being connected on control circuit, the control circuit includes three groups of thermal relay module, three groups of main contactor module, three groups of first fuse module, three groups of second fuse module, multi-channel timer module, warning light of collaborative work;

[0006] The thermal relay module, the main contactor module, the first fuse module are sequentially connected on the phase line of the main motor;

[0007] The output end of the main contactor module connected on the main motor is connected with the multi-channel timer module, and the warning light is connected with the multi-channel timer module.

[0008] The second fuse module is connected with the phase line output end of the control circuit.

[0009] Further, the multi-channel timer module uses 24-220V AC voltage input, and the timing mode uses six-bit time division timing, and the maximum timing is 9999 hours 59 minutes.

[0010] Further, the output end of the multi-channel timer module is connected with the zero line of the control circuit through load.

[0011] Further, the phase line output end of the control circuit is connected with the phase line of the main motor through load.

[0012] Further, the multi-channel timer module is provided with a power-off protection module.

[0013] Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses a multi-channel timer module and a warning lamp are incorporated at the main contactor module of the on-site control cabinet in the control circuit of the belt reducer oil pump cooling motor of the coal conveying system of the thermal power plant, the timing defect of the original circuit design is improved, the working time is set to 1500 hours, and after the time limit is reached, the warning lamp is constant, reminding the staff to regularly check and replace the bearing and oil seal part of the motor, after completion, the personnel manually reset to zero and re-timing enters the next timing period, the multi-channel timer module is added and the working time is set, and the time warning lamp is constant alarm, reminding the inspection personnel, so that timely discovery and advance arrangement of repair are facilitated, the repair problem of part of low-voltage motors of part of thermal power plants not connected to the DCS is solved, experience estimation is replaced, and the accuracy is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] The description and the specific embodiments of the utility model are provided with the drawings to provide further understanding of the utility model, and the utility model is explained by the illustrative embodiments and the description, and does not constitute improper limitation to the utility model.

[0015] Figure 1 It is the overall electrical schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the utility model will be clearly and completely described below, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. The embodiment and the features in the embodiment in the application can be combined with each other without conflict. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] It should be noted that if the embodiment of the utility model relates to directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, and if the specific posture changes, the directionality indication also changes accordingly.

[0018] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] like Figure 1 As shown, this utility model discloses a low-voltage motor lifecycle timing system, applied in the coal conveying system of a thermal power plant in a coal conveying area. It includes a main motor connected to a control circuit for intermittent operation in some thermal power plants. The control circuit includes three sets of thermal relay modules, three sets of main contactor modules, three sets of first fuse modules, three sets of second fuse modules, a multi-channel timer module, and a warning light working in conjunction with the main motor. The output of the thermal relay module is electrically connected to the phase line of the main motor, and its input is electrically connected to the output of the main contactor module. The input of the main contactor module is electrically connected to the output of the first fuse module, and the input of the first fuse module is electrically connected to the phase line output of the control circuit. The output of the main contactor module on one phase line of the main motor is electrically connected to the input of the multi-channel timer module. The input and output of the warning light are electrically connected to the output and input of the multi-channel timer module. The phase line output of the control circuit is electrically connected to the input of the second fuse module, and the output of the second fuse module is electrically connected to the phase line input of the main motor.

[0020] In practice, a multi-channel timer module with power-off protection is connected to the output terminal of the main contactor module, which is connected to one phase line of the control circuit on the main motor. An alarm light is connected to the output and input terminals of the multi-channel timer module to set the time. Taking a belt-driven reducer oil pump cooling motor as an example, after the switch is activated, the main contactor module engages, and the multi-channel timer module starts timing. The timer is set to alarm after 1500 hours. After the set time limit is reached, the alarm light remains constant, reminding the staff to periodically inspect and replace the bearings and oil seals in the motor. After completion, the timing restarts for the next timing cycle.

[0021] In an embodiment, the multi-channel timer module adopts 24-220V AC voltage input, and the timing mode adopts six-bit time division timing, and the maximum timing is 9999 hours and 59 minutes, and the double-channel control warning light or buzzer action can be controlled.

[0022] In an embodiment, the output end of the multi-channel timer module is connected to the zero line of the control circuit through a load. In this way, the current can be returned, and the ground connection is ensured for electrical safety.

[0023] In an embodiment, the phase line output end of the control circuit is connected to the phase line of the main motor through a load. In this way, the main motor can be electrically connected to the control circuit, forming a motor control circuit, and the multi-channel timer module and the warning light are incorporated into the motor control circuit, and the time reminder is set, and the warning light constantly alarms after the time.

[0024] In an embodiment, the thermal relay module is used to determine whether the main motor is overloaded by monitoring the phase line current of the main motor, so as to cut off the power supply when the overload occurs, and protect the main motor in the control circuit.

[0025] In an embodiment, the main contactor module is mainly used to control the on-off of the circuit, and is usually used for starting, stopping and protecting the large-power motor, transformer and other industrial equipment.

[0026] In an embodiment, the first fuse module is used to protect the load connected to the phase line of the main motor from damage caused by overload or short circuit, and the second fuse module is used to protect the load in the control circuit from damage caused by overload or short circuit. When the overload or short circuit occurs in the circuit, the metal wire inside the fuse will quickly melt and break due to the excessive current, thereby cutting off the current and preventing greater damage to the circuit and equipment.

[0027] In an embodiment, the multi-channel timer module is provided with a power-off protection module. In this way, the service life of the multi-channel timer module can be prolonged.

[0028] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A low-voltage motor lifecycle timing system, characterized in that: It includes a main motor installed in the coal conveying area and connected to the control circuit for intermittent operation of some thermal power plants. The control circuit includes three sets of thermal relay modules, three sets of main contactor modules, three sets of first fuse modules, three sets of second fuse modules, a multi-channel timer module, and warning lights that work together. The thermal relay module, the main contactor module, and the first fuse module are sequentially connected to the phase lines of the main motor. The multi-channel timer module is connected to the output terminal of the main contactor module connected to the main motor, and the warning light is connected in parallel to the multi-channel timer module; The second fuse module is connected to the phase output terminal of the control circuit.

2. The low-voltage motor lifecycle timing system according to claim 1, characterized in that: The multi-channel timer module uses a 24-220V AC voltage input and a six-digit hour-minute timing mode, with a maximum timing of 9999 hours and 59 minutes.

3. The low-voltage motor lifecycle timing system according to claim 1, characterized in that: The output of the multi-channel timer module is connected to the neutral line of the control loop via a load.

4. The low-voltage motor lifecycle timing system according to claim 1, characterized in that: The phase output terminal of the control circuit is connected to the phase of the main motor via a load.

5. A low-voltage motor lifecycle timing system according to claim 1, characterized in that: The multi-channel timer module is equipped with a power failure protection module.

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