Automatic starting device of generator set

Abstract

The utility model discloses an automatic starting device of a generator set. The automatic starting device comprises a starting output relay 7XE1, a starting control relay KT1, a starting interval control relay KT2, a starting period control relay KT3, a starting success relay 5XE6 and a rotating speed processing module, according to the utility model, by adjusting the delay time of the starting control relay KT1, the starting output time is changed and controlled, by adjusting the delay time of the starting interval control relay KT2, the interval time between two adjacent times is changed, and by adjusting the starting period control relay KT3, the automatic starting period is controlled. The starting period control relay KT3 is set according to starting time, interval time and starting times. According to the utility model, the automatic starting control of the generator set can be realized by adopting discrete devices without using a programmable control device, the cost is low, the circuit is simple, safe and reliable, and the replaceability is strong.

Description

Technical Field

[0001] The utility model relates to an automatic starting device for a generator set, in particular to an automatic starting device for a generator set, and belongs to the technical field of electrical engineering. Background Art

[0002] The starting modes of generator sets are generally divided into manual start and automatic start. Manual start is to complete the manual start command through electrical discrete components; automatic start is generally to complete the automatic start command through programming through a logic programmable control device, and judge the success of the start by collecting the speed signal. Automatic start can be achieved through logic programmable control, which is simple and convenient. However, in some special projects, such as nuclear power projects, the main control circuit is required to be safe and reliable. If the main control circuit uses a logic programmable control device or a device with underlying programming in the main circuit, program verification is required to verify its reliability and safety, but the cost of program verification is high, the verification cycle is long, and the replaceability is poor. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides an automatic starting device for a generator set, which can realize automatic starting of the generator without using a programmable control device, has low cost, and the control circuit is simple, safe, reliable and highly replaceable.

[0004] To achieve the above-mentioned purpose of the invention, the utility model provides an automatic starting device for a generator set, comprising a starting output relay 7XE1, a starting control relay KT1, a starting interval control relay KT2, a starting cycle control relay KT3, a starting success relay 5XE6 and a speed processing module, wherein ports 1 and 2 of the speed processing module are connected to a speed sensor T, and the speed sensor T is used to collect speed information of the generator set, ports 3 and 5 of the speed processing module are connected to the positive end of a power supply, ports 4 and 6 of the speed processing module are connected to the negative end of a power supply, and a starting switch K1 is connected between ports 5 and 6 of the speed processing module;

[0005] The start success relay 5XE6 is connected to the circuit between port 6 of the speed processing module and the negative end of the power supply; the start output relay 7XE1, the start control relay KT1 normally closed contact, the start cycle control relay KT3 normally closed contact and the start success relay 5XE6 normally closed contact 5XE6-1 are connected in series in sequence and then connected between the positive and negative ends of the power supply, wherein the start output relay 7XE1 is connected to the positive end of the power supply through the automatic start signal input switch KT0, and the start success relay 5XE6 normally closed contact 5XE6-1 is connected to the negative end of the power supply; the start control relay KT1 and the start interval control relay KT2 normally closed contact KT2-1 are connected in series in the circuit, and the start interval control relay K T2 is connected in series with the normally open contact KT1-2 of the dynamic control relay KT1 in the circuit, wherein the start control relay KT1 and the start control relay KT2 are both connected to the positive end of the power supply through the automatic start signal input switch KT0, the normally closed contact KT2-1 of the start interval control relay KT2 and the normally open contact KT1-2 of the dynamic control relay KT1 are both connected to the circuit between the normally closed contact KT1-1 of the start control relay KT1 and the normally closed contact KT3-1 of the start cycle control relay KT3; one end of the start cycle control relay KT3 is connected to the automatic start signal input switch KT0, and the other end is connected to the negative end of the power supply through the normally closed contact 5XE6-1 of the start success relay 5XE6.

[0006] Compared with the prior art, the utility model changes the control start output time by adjusting the delay time of the start control relay KT1, changes the interval time between two adjacent times by adjusting the delay time of the start interval control relay KT2, and controls the automatic start cycle by adjusting the start cycle control relay KT3. The setting of the start cycle control relay KT3 is set according to the start time, the interval time and the number of starts. The utility model can be extended to other circuits that have requirements for control time, control interval and the number of starts, and the output time and the number of outputs can be adjusted by changing the delay time of the relay. The utility model does not need to use a programmable control device, and can realize the automatic start control of the generator set by using discrete devices, which has low cost, simple circuit, safety and reliability, and strong replaceability.

[0007] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a principle wiring diagram of a generator set automatic starting device according to an embodiment of the utility model;

[0009] Figure 2This is a timing diagram of a primary start output of an automatic start device for a generator set according to an embodiment of the utility model;

[0010] Figure 3 This is a two-start output timing diagram of an automatic starting device for a generator set according to an embodiment of the utility model;

[0011] Figure 4 The present invention is a three-time starting output timing diagram of an automatic starting device for a generator set according to an embodiment of the present invention. DETAILED DESCRIPTION

[0012] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0013] The disclosure below provides many different embodiments or examples to realize different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0014] Reference below Figure 1 A generator set automatic starting device according to an embodiment of the utility model is described, including a starting output relay 7XE1, a starting control relay KT1, a starting interval control relay KT2, a starting cycle control relay KT3, a starting success relay 5XE6 and a speed processing module, wherein ports 1 and 2 of the speed processing module are connected to a speed sensor T, and the speed sensor T is used to collect the speed information of the generator set. In other words, the speed sensor T is electrically connected to the generator set, ports 3 and 5 of the speed processing module are connected to the positive end of the power supply, ports 4 and 6 of the speed processing module are connected to the negative end of the power supply, and a starting switch K1 is connected between ports 5 and 6 of the speed processing module; the starting success relay 5XE6 is connected to the circuit between port 6 of the speed processing module and the negative end of the power supply; the speed processing module of this embodiment is a CB-2 type intelligent overspeed protection controller.

[0015] The start output relay 7XE1, the start control relay KT1 normally closed contact, the start cycle control relay KT3 normally closed contact and the start success relay 5XE6 normally closed contact 5XE6-1 are connected in series in sequence and then connected between the positive and negative ends of the power supply. Among them, the start output relay 7XE1 is connected to the positive end of the power supply through the automatic start signal input switch KT0, and the start success relay 5XE6 normally closed contact 5XE6-1 is connected to the negative end of the power supply; the start control relay KT1 and the start interval control relay KT2 normally closed contact KT2-1 are connected in series in the circuit, and the start interval control relay KT2 and the normally open contact KT1 of the dynamic control relay KT 1-2 are connected in series in the circuit, wherein the start control relay KT1 and the start control relay KT2 are both connected to the positive terminal of the power supply through the automatic start signal input switch KT0, the normally closed contact KT2-1 of the start interval control relay KT2 and the normally open contact KT1-2 of the dynamic control relay KT1 are both connected to the circuit between the normally closed contact KT1-1 of the start control relay KT1 and the normally closed contact KT3-1 of the start cycle control relay KT3; one end of the start cycle control relay KT3 is connected to the automatic start signal input switch KT0, and the other end is connected to the negative terminal of the power supply through the normally closed contact 5XE6-1 of the start success relay 5XE6.

[0016] In this embodiment, the start control relay KT1 is a time relay for controlling the start output time; the start interval control relay KT2 is a time relay for controlling the start interval time, that is, the interval time between two adjacent starts; the start cycle control relay KT3 is a time relay for controlling the entire automatic start cycle, and the setting of the time relay is determined according to the start time, interval time and the number of starts; the start output relay 7XE1 is an intermediate relay for controlling the output relay of the start circuit. The start success relay 5XE6 is a speed relay for outputting a start success signal according to the set start success speed value.

[0017] refer to Figures 2 to 4 As shown, the automatic starting method based on the above device is as follows:

[0018] When the start signal input switch KT0 is closed, the start output relay 7XE1, the start control relay KT1 and the start cycle control relay KT3 receive the automatic start signal, the start control relay KT1 and the start cycle control relay KT3 start timing, and the start output relay 7XE1 starts outputting at the same time:

[0019] If the speed value of the generator set collected by the speed sensor T reaches 300rpm within the start time set by the start control relay KT1, the speed processing module controls the start switch K1 to close, the generator set is powered on and started successfully, the start success relay 5XE6 is actuated, and a start success signal is output, and the normally closed contact 5XE6-1 of the start success relay 5XE6 is disconnected, and the control circuit of the generator set is cut off;

[0020] If the speed value of the generator set collected by the speed sensor T is less than 300rpm within the start time set by the start control relay KT1, the generator set fails to start, and the following steps are performed:

[0021] S1 starts the control relay KT1 to operate, disconnecting its normally closed contact KT1-1, cutting off the start output relay 7XE1, and retracting the start output relay 7XE1. At the same time, the normally open contact KT1-2 of the start control relay KT1 is closed, and the start interval control relay KT2 is connected;

[0022] S2 starts the timing of the interval control relay KT2. After a 10-second delay, the normally closed contact KT2-1 of the interval control relay KT2 is disconnected, and the power supply circuit of the start control relay KT1 is cut off. In this way, the start control relay KT1 loses power and returns to normal, that is, the normally open contact KT1-2 of the start control relay KT1 is disconnected, and the normally closed contact KT1-1 of the start control relay KT1 is closed, and the start output relay 7XE1 sends a start signal again;

[0023] S3 repeatedly executes steps S1-S2. If it starts three times in succession within the set time of the start cycle control relay KT3, and any start is successful, the start success relay 5XE6 will be actuated to output a start success signal, and the normally closed contact 5XE6-1 of the start success relay 5XE6 will be disconnected, cutting off the control circuit.

[0024] The utility model can change the control start output time by adjusting the delay time of the start control relay KT1; can change the interval time between two adjacent times by adjusting the delay time of the start interval control relay KT2; can control the automatic start cycle by adjusting the start cycle control relay KT3, and the setting of the start cycle control relay KT3 is set according to the start time, interval time and start times. The utility model does not need to use a programmable control device, and can realize the automatic start control of the generator set by using discrete devices, which has low cost, simple circuit, safety and reliability, and strong replaceability. The utility model can also be extended to other circuits that have requirements for control time, control interval and start times, and the output time and output times can be adjusted by changing the delay time of the relay.

[0025] Other components of the automatic starting device of the generator set according to the embodiment of the utility model, such as the starting output relay 7XE1, the starting control relay KT1, the starting interval control relay KT2, the starting cycle control relay KT3 and the starting success relay 5XE6, etc. and their operations are well known to ordinary technicians in the field and will not be described in detail here.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A generator set automatic starting device, characterized in that: It includes a start output relay 7XE1, a start control relay KT1, a start interval control relay KT2, a start cycle control relay KT3, a start success relay 5XE6 and a speed processing module, wherein ports 1 and 2 of the speed processing module are connected to a speed sensor T, ports 3 and 5 of the speed processing module are connected to a positive power supply terminal, ports 4 and 6 of the speed processing module are connected to a negative power supply terminal, and a start switch K1 is connected between ports 5 and 6 of the speed processing module; The start success relay 5XE6 is connected to the circuit between port 6 of the speed processing module and the negative terminal of the power supply; the start output relay 7XE1, the normally closed contact of the start control relay KT1, the normally closed contact of the start cycle control relay KT3 and the normally closed contact 5XE6-1 of the start success relay 5XE6 are connected in series in sequence and connected between the positive and negative ends of the power supply, wherein the start output relay 7XE1 is connected to the positive terminal of the power supply through the automatic start signal input switch KT0, and the normally closed contact 5XE6-1 of the start success relay 5XE6 is connected to the negative terminal of the power supply; The start control relay KT1 and the normally closed contact KT2-1 of the start interval control relay KT2 are connected in series in the circuit, and the start interval control relay KT2 and the normally open contact KT1-2 of the dynamic control relay KT1 are connected in series in the circuit, wherein the start control relay KT1 and the start control relay KT2 are both connected to the positive end of the power supply through the automatic start signal input switch KT0, and the normally closed contact KT2-1 of the start interval control relay KT2 and the normally open contact KT1-2 of the dynamic control relay KT1 are both connected to the circuit between the normally closed contact KT1-1 of the start control relay KT1 and the normally closed contact KT3-1 of the start cycle control relay KT3; One end of the start cycle control relay KT3 is connected to the automatic start signal input switch KT0, and the other end is connected to the negative terminal of the power supply through the normally closed contact 5XE6-1 of the start success relay 5XE6.

2. The automatic starting device for a generator set according to claim 1, characterized in that: The start output relay 7XE1 is an intermediate relay, the start control relay KT1, the start interval control relay KT2 and the start cycle control relay KT3 are time relays, and the start success relay 5XE6 is a speed relay.

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