A high-voltage power supply bicycle and low-voltage emergency power supply control circuit

Abstract

The utility model discloses a high -pressure power supply row car and low pressure emergency power supply control circuit, including low pressure emergency power supply circuit, high -pressure power supply circuit and low voltage power circuit, low pressure emergency power supply circuit, low voltage power circuit are connected with high -pressure power supply circuit electricity through double throw knife switch, through double throw knife switch can make high -pressure power supply circuit with low voltage power circuit electricity connection, or make low pressure emergency power supply circuit with low voltage power circuit electricity connection, the circuit breaker of low pressure emergency power supply circuit series connection has the breaker of taking apart exciter release. The utility model can guarantee high -pressure system failure, through low pressure emergency power supply circuit power supply, still can make the row car emergency use, ensure smooth operation, maximum limit protection high -low voltage power supply and prevent the equipment damage caused by phase sequence error.

Description

Technical Field

[0001] This utility model relates to the field of crane control technology, specifically a high-voltage power supply crane and a low-voltage emergency power supply control circuit. Background Technology

[0002] With the continuous improvement of industrial automation, lifting equipment is increasingly widely used in modern production, especially in ports, metallurgy, power, and rail transportation. High-voltage powered overhead cranes have become key material handling equipment due to their high power and efficiency. These cranes typically use high-voltage power supplies (such as 380V or higher) to directly drive high-power motors for the main hoist, trolley, and crane to meet the needs of heavy-load and continuous operation. However, high-voltage power supply systems may experience power outages or abnormal power supply due to grid fluctuations, line faults, or circuit breaker tripping. Once the high-voltage power supply is interrupted, the crane will not be able to operate normally, and may even cause the load being lifted to suspend in the air, posing a serious safety hazard. Furthermore, when the high-voltage system fails, the vehicle's auxiliary systems (such as driver's cab lighting, air conditioning, ventilation equipment, safety monitoring systems, and communication devices) also lose power. This prevents operators from clearly observing the work environment and disrupts communication with the outside world, affecting not only emergency response efficiency but also potentially causing secondary accidents due to harsh environments (such as high temperatures or oxygen deficiency in confined spaces). Therefore, ensuring continuous power supply to critical auxiliary equipment and maintaining basic operating conditions and personnel safety in the event of high-voltage power failure has become a key technical issue for improving vehicle safety and reliability.

[0003] Currently, some crane equipment is equipped with backup power supplies or uninterruptible power supplies (UPS) systems to provide short-term power support in the event of a main power failure. However, most existing emergency power supply solutions suffer from problems such as untimely switching, simplistic control logic, and a lack of status indication and protection linkage. For example, manual power switching is time-consuming and prone to misoperation; some automatic switching devices are not effectively integrated with the crane control system and cannot provide real-time feedback on power status; furthermore, the emergency power supply circuit itself lacks effective overload, short-circuit, or motor fault protection mechanisms, which may fail to disconnect the power supply in time under abnormal circumstances, posing a safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-voltage power supply control circuit for cranes and a low-voltage emergency power supply. This circuit can ensure that when the high-voltage system fails, the crane can still be used in an emergency by supplying power through the low-voltage emergency power supply circuit, ensuring stable operation, maximizing the protection of high and low voltage power supplies, and preventing equipment damage caused by phase sequence errors. This can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage power supply crane and a low-voltage emergency power supply control circuit, including a low-voltage emergency power supply circuit, a high-voltage power supply circuit, and a low-voltage power consumption circuit. The low-voltage emergency power supply circuit and the low-voltage power consumption circuit are electrically connected to the high-voltage power supply circuit via a double-throw knife switch. The double-throw knife switch enables the high-voltage power supply circuit to be electrically connected to the low-voltage power consumption circuit, or enables the low-voltage emergency power supply circuit to be electrically connected to the low-voltage power consumption circuit. The low-voltage emergency power supply circuit is connected in series with a circuit breaker Q00 equipped with a shunt trip unit.

[0006] Preferably, it also includes a low-voltage emergency power supply control circuit, which includes a relay K60 and multiple indicator lights. The relay K60 is connected in series with a normally open auxiliary contact of a double-throw knife switch, and the multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K60.

[0007] Preferably, it also includes a high-voltage power supply control circuit, which includes a relay K61 and multiple indicator lights. The relay K61 is connected in series with the normally open auxiliary contact of a double-throw knife switch, and the multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K61.

[0008] Preferably, it also includes a low-voltage emergency power supply protection circuit, in which a comprehensive protector F10 is connected in series, the normally closed contact of the comprehensive protector F10 is connected in series with a shunt trip unit, and the normally open contact of the comprehensive protector F10 is connected in series with multiple parallel indicator lights.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by setting up a low-voltage emergency power supply circuit, a high-voltage power supply circuit, a low-voltage power consumption circuit, and a double-throw knife switch, it can ensure that when the high-voltage system fails, power is supplied through the low-voltage emergency power supply circuit, so that the vehicle can still be used in an emergency and ensure stable operation; in addition, the low-voltage emergency power supply control circuit, the high-voltage power supply control circuit, and the low-voltage emergency power supply protection circuit can maximize the protection of high and low voltage power supplies and prevent equipment damage caused by phase sequence errors. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the circuit principle of this utility model; Figure 2 This is a schematic diagram of the low-voltage emergency power supply control circuit of this utility model; Figure 3 This is a schematic diagram of the high-voltage power supply control circuit of this utility model; Figure 4 This is a schematic diagram of the low-voltage emergency power supply protection circuit of this utility model.

[0011] In the diagram: 1 Low-voltage emergency power supply circuit, 2 Low-voltage emergency power supply control circuit, 3 Double-throw knife switch, 4 High-voltage power supply circuit, 5 High-voltage power supply control circuit, 6 Low-voltage power consumption circuit, 7 Low-voltage emergency power supply protection circuit. Detailed Implementation

[0012] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0013] Please see Figure 1-4 This utility model provides a technical solution: a high-voltage power supply crane and a low-voltage emergency power supply control circuit, including a low-voltage emergency power supply circuit 1, a high-voltage power supply circuit 4, and a low-voltage power consumption circuit 6. The low-voltage emergency power supply circuit 1 and the low-voltage power consumption circuit 6 are electrically connected to the high-voltage power supply circuit 4 through a double-throw knife switch 3. The double-throw knife switch 3 can connect the high-voltage power supply circuit 4 to the low-voltage power consumption circuit 6, or connect the low-voltage emergency power supply circuit 1 to the low-voltage power consumption circuit 6. The low-voltage emergency power supply circuit 1 is connected in series with a circuit breaker Q00 with a shunt trip unit. The high-voltage power supply circuit 4 and the low-voltage power supply circuit 6 are connected by the double-throw knife switch 3, or the low-voltage emergency power supply circuit 1 and the low-voltage power supply circuit 6 are connected. The low-voltage emergency power supply circuit 1 provides emergency power. In the event of a high-voltage line failure, the emergency power supply can be used to ensure the power supply of the crane's internal lighting, air conditioning, ventilation and communication equipment, so that the crane can still be used in an emergency even if the high-voltage system fails, thus ensuring safe use. Furthermore, such as Figure 2 As shown, it also includes a low-voltage emergency power supply control circuit 2. The low-voltage emergency power supply control circuit 2 includes a relay K60 and multiple indicator lights. The relay K60 is connected in series with the normally open auxiliary contact 1 of the double-throw knife switch 3. The multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K60. It should be noted that the multiple indicator lights respectively indicate the driver's cab power indicator, the power switching indicator, and the emergency power indicator. When the emergency power is put into use, the normally open auxiliary contact 1 of the double-throw knife switch 3 closes, the relay K60 is energized, the normally open contact of the relay K60 closes, and the multiple indicator lights light up. Furthermore, such as Figure 3As shown, it also includes a high-voltage power supply control circuit 5. The high-voltage power supply control circuit 5 includes a relay K61 and multiple indicator lights. The relay K61 is connected in series with the normally open auxiliary contact 2 of the double-throw knife switch 3. The multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K61. It should be noted that the multiple indicator lights respectively indicate the driver's cab power indicator, the power switching indicator, and the emergency power indicator. When the high-voltage power supply is put into use, the normally open auxiliary contact 2 of the double-throw knife switch 3 closes, the relay K61 is energized, the normally open contact of the relay K61 closes, and the multiple indicator lights light up. Furthermore, it also includes a low-voltage emergency power supply protection circuit 7, which is connected in series with a comprehensive protector F10 to protect the motor and its auxiliary equipment from damage caused by various electrical and mechanical faults. The normally closed contact of the comprehensive protector F10 is connected in series with the shunt trip unit, and the normally open contact of the comprehensive protector F10 is connected in series with multiple parallel indicator lights. When the comprehensive protector F10 is working normally, its normally open contact is closed, the indicator lights are lit, and it can work normally. When the comprehensive protector F10 detects an abnormality, it cuts off the power, its normally closed contact opens, the shunt trip unit coil is de-energized, the circuit breaker Q00 with the shunt trip unit opens, the low-voltage emergency power supply circuit 1 is de-energized, and the motor is protected.

[0014] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A high-voltage power supply control circuit for cranes and a low-voltage emergency power supply, characterized in that: It includes a low-voltage emergency power supply circuit (1), a high-voltage power supply circuit (4), and a low-voltage power consumption circuit (6). The low-voltage emergency power supply circuit (1) and the low-voltage power consumption circuit (6) are electrically connected to the high-voltage power supply circuit (4) through a double-throw knife switch (3). The double-throw knife switch (3) can connect the high-voltage power supply circuit (4) to the low-voltage power consumption circuit (6) or the low-voltage emergency power supply circuit (1) to the low-voltage power consumption circuit (6). The low-voltage emergency power supply circuit (1) is connected in series with a circuit breaker Q00 with a shunt trip unit.

2. A high-voltage power supply and low-voltage emergency power supply control circuit according to claim 1, characterized in that: It also includes a low-voltage emergency power supply control circuit (2), which includes a relay K60 and multiple indicator lights. The relay K60 is connected in series with the normally open auxiliary contact of the double-throw knife switch (3), and the multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K60.

3. A high-voltage power supply and low-voltage emergency power supply control circuit according to claim 1, characterized in that: It also includes a high-voltage power supply control circuit (5), which includes a relay K61 and multiple indicator lights. The relay K61 is connected in series with the normally open auxiliary contact of the double-throw knife switch (3), and the multiple indicator lights are connected in parallel and then connected in series with the normally open contact of the relay K61.

4. A high voltage power supply and low voltage emergency power supply control circuit according to claim 1, characterized in that: It also includes a low-voltage emergency power supply protection circuit (7), which is connected in series with a comprehensive protector F10. The normally closed contact of the comprehensive protector F10 is connected in series with the shunt trip unit, and the normally open contact of the comprehensive protector F10 is connected in series with multiple parallel indicator lights.

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