Suction lifting equipment control circuit with standby power supply

Abstract

The utility model discloses a sucking and lifting equipment control circuit with a standby power supply, which comprises a vacuum pump motor working circuit, a vacuum pump motor control circuit, a first relay, a second relay, a direct current power supply, a standby power supply module, a battery module and a vacuum pressure monitoring module. The device can still work and display the negative pressure value under the power-off condition, the safety is improved, a green indicator light, a red indicator light and a buzzer can remind that the pressure is low and give an alarm under the power-on condition and remind that the device is in the power-off state and also give an alarm under the power-off condition, and the intelligent degree and the safety of the device are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of suction and lifting, in particular to a suction and lifting equipment control circuit with a backup power supply. Background Art

[0002] Suction lifting equipment usually includes a hanger assembly, a suction cup assembly and an electrical control assembly. When the suction cup is placed on the surface of the workpiece, the vacuum pump extracts the air in the suction cup to form a certain vacuum degree, thereby causing a pressure difference between the inside and outside of the suction cup and then sucking the surface of the workpiece to carry the workpiece horizontally or vertically. The vacuum principle can be used to carry materials such as steel plates, aluminum plates, composite plates, and wood, which can replace manual handling, so it is in great demand in the market.

[0003] The safety of the suction lifting equipment is the most important indicator to be considered when using the suction lifting equipment. Once the power supply from the factory power grid fails, the control circuit of the existing suction lifting equipment will be out of power and unable to provide alarm prompts. In addition, the suction lifting equipment that is performing suction lifting operations is in a negative pressure state of adsorbing objects. After the power failure, the negative pressure state cannot be read, which will bring great risks in use. Utility Model Content

[0004] The purpose of the utility model is to provide a control circuit of a suction and lifting equipment with a backup power supply to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A control circuit of a suction and lifting equipment with a backup power supply, comprising a vacuum pump motor working circuit, a vacuum pump motor control circuit, a first relay, a second relay, a DC power supply, a backup power supply module, a battery module and a vacuum pressure monitoring module;

[0007] The first relay comprises a first relay coil and a first relay normally open contact;

[0008] The second relay comprises a second relay coil, a second relay normally open contact and a second relay normally closed contact;

[0009] The vacuum pressure monitoring module includes a vacuum sensor, a red indicator light, a buzzer and a green indicator light;

[0010] The backup power supply module includes a DC power input interface, a DC power output interface, a battery module input interface, a battery module charging interface and a timing power output interface;

[0011] The DC power supply supplies power to the vacuum pump motor control circuit, and the DC power supply output interface supplies power to the vacuum pressure monitoring module;

[0012] The vacuum pump motor working circuit is connected in series with the normally open contact of the first relay;

[0013] The vacuum pump motor control circuit is connected in series with the first relay coil;

[0014] The vacuum sensor comprises a vacuum sensor input terminal, a vacuum sensor output terminal 1 and a vacuum sensor output terminal 2;

[0015] The second output terminal of the vacuum sensor is connected in series with the second relay coil;

[0016] The normally open contact of the first relay is connected in series with the red indicator light, the buzzer and the green indicator light respectively;

[0017] The normally open contact of the second relay is connected in series between the normally open contact of the first relay and the green indicator light;

[0018] The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the red indicator light;

[0019] The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the buzzer;

[0020] The timing power supply output interface is connected in series with the red indicator light and the buzzer respectively, and the series circuit composed of the normally open contact of the first relay and the normally closed contact of the second relay is connected in parallel with the timing power supply output interface;

[0021] When the vacuum sensor is abnormal, the second output terminal of the vacuum sensor has no voltage output;

[0022] When the DC power input interface supplies power, the battery module input interface is disconnected, the battery module charging interface is turned on, and the timing power output interface is disconnected;

[0023] When the DC power input interface is powered off, the battery module input interface is turned on, the battery module charging interface is disconnected, and the timing power output interface is turned on.

[0024] Preferably, the vacuum pump motor working circuit includes a miniature circuit breaker, which is arranged between the normally open contact of the first relay and the external power grid.

[0025] Preferably, it comprises a thermal magnetic protection circuit breaker, the thermal magnetic protection circuit breaker is connected in series to the vacuum pump motor working circuit, and the thermal magnetic protection circuit breaker is connected in series to the vacuum pump motor control circuit.

[0026] Preferably, the vacuum pump motor control circuit is connected in series with an INO self-locking power-on knob.

[0027] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0028] When the external power grid is out of power, the vacuum sensor remains powered and can work normally. The user can understand the negative pressure status of the suction and lifting equipment at this time. At the same time, the red alarm light and the buzzer can continue to alarm within the timing range of the timing power output interface. The green indicator light is off, which also indicates that the external power grid is out of power and the suction and lifting equipment is in a stopped working state; when the external power grid has power, the backup power module can charge the battery module. When the vacuum pressure is in normal conditions, the green indicator light is on. When the vacuum pressure is in abnormal conditions, the green indicator light is off, the red indicator light is on and the buzzer alarm is on, indicating that the negative pressure is insufficient. At this time, the vacuum pressure pump handles the suction state until the negative pressure is within the normal working threshold range again, the green indicator light is on, the red indicator light is off and the buzzer stops ringing.

[0029] The vacuum sensor of the present application is always in a powered state. It can still work and display the negative pressure value when the power is off, thereby improving safety. The green indicator light, red indicator light and buzzer can prompt a low pressure alarm when there is power, and indicate that the device is in a power-off state when there is no power. It can also sound an alarm, further improving the intelligence and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a working principle diagram of the vacuum pump motor working circuit and DC power supply of the utility model;

[0032] Figure 2 This is a working principle diagram of the backup power module and the battery module of the utility model;

[0033] Figure 3 This is a working principle diagram of the vacuum pump motor control circuit and vacuum pressure monitoring module of the utility model;

[0034] In the figure, miniature circuit breaker-QF1, vacuum pump motor M~3, thermal magnetic protection circuit breaker-RT1, first relay-KM1, second relay-KA1, INO self-locking power-on knob-SB1, DC power supply-PSU1, backup power module-UPS1, battery module-BAT1, vacuum sensor-B320, red indicator light-HL2.1, buzzer-B1, green indicator light-HL2.2. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0037] A control circuit of a suction and lifting equipment with a backup power supply, comprising a vacuum pump motor working circuit, a vacuum pump motor control circuit, a first relay, a second relay, a DC power supply, a backup power supply module, a battery module and a vacuum pressure monitoring module;

[0038] The first relay comprises a first relay coil and a first relay normally open contact;

[0039] The second relay comprises a second relay coil, a second relay normally open contact and a second relay normally closed contact;

[0040] The vacuum pressure monitoring module includes a vacuum sensor, a red indicator light, a buzzer and a green indicator light;

[0041] The backup power supply module includes a DC power input interface, a DC power output interface, a battery module input interface, a battery module charging interface and a timing power output interface;

[0042] The DC power supply supplies power to the vacuum pump motor control circuit, and the DC power supply output interface supplies power to the vacuum pressure monitoring module;

[0043] The vacuum pump motor working circuit is connected in series with the normally open contact of the first relay;

[0044] The vacuum pump motor control circuit is connected in series with the first relay coil;

[0045] The vacuum sensor comprises a vacuum sensor input terminal, a vacuum sensor output terminal 1 and a vacuum sensor output terminal 2;

[0046] The second output terminal of the vacuum sensor is connected in series with the second relay coil;

[0047] The normally open contact of the first relay is connected in series with the red indicator light, the buzzer and the green indicator light respectively;

[0048] The normally open contact of the second relay is connected in series between the normally open contact of the first relay and the green indicator light;

[0049] The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the red indicator light;

[0050] The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the buzzer;

[0051] The timing power supply output interface is connected in series with the red indicator light and the buzzer respectively, and the series circuit composed of the normally open contact of the first relay and the normally closed contact of the second relay is connected in parallel with the timing power supply output interface;

[0052] When the vacuum sensor is abnormal, the second output terminal of the vacuum sensor has no voltage output;

[0053] When the DC power input interface supplies power, the battery module input interface is disconnected, the battery module charging interface is turned on, and the timing power output interface is disconnected;

[0054] When the DC power input interface is powered off, the battery module input interface is turned on, the battery module charging interface is disconnected, and the timing power output interface is turned on.

[0055] The power supply and power off of the DC power input interface and the conduction and disconnection of other interfaces can be designed based on the logical principles of the relay coil and actuator, while the conduction and disconnection of the timing power output interface can be achieved by adding a timing switch in series design based on the relay principle.

[0056] Preferably, the vacuum pump motor working circuit includes a miniature circuit breaker, which is arranged between the normally open contact of the first relay and the external power grid.

[0057] Preferably, it comprises a thermal magnetic protection circuit breaker, the thermal magnetic protection circuit breaker is connected in series to the vacuum pump motor working circuit, and the thermal magnetic protection circuit breaker is connected in series to the vacuum pump motor control circuit.

[0058] Preferably, the vacuum pump motor control circuit is connected in series with an INO self-locking power-on knob.

[0059] Specific working principle:

[0060] The vacuum pump motor uses a three-phase electric motor. The three-phase electricity connected to the factory power grid first passes through a miniature circuit breaker when entering the factory, and then enters the vacuum pump motor working circuit and DC power supply. The vacuum pump motor is connected in series with the normally open contacts of the first relay and the thermal magnetic protection circuit breaker to protect the vacuum pump motor well. The DC power supply is connected to any two of the three phases to convert AC power into 24V DC power, which is used as the system working power supply. In this way, the system working voltage is 24V, and electricity use is safer.

[0061] The backup power supply module is provided with five interfaces, two input interfaces and three output interfaces. The two input interfaces are respectively a DC power input interface and a battery module input interface, which is convenient for switching during power outages. The three output interfaces include a DC power output interface for powering the vacuum pressure monitoring module including a vacuum sensor, a red indicator light, a buzzer and a green indicator light. Another is a timing power output interface for directly supplying timing power to the red indicator light and the buzzer in case of a power outage, which is convenient for alarm. The third is a battery module charging interface, which powers the battery module when there is external power.

[0062] When there is power, the vacuum pump motor control circuit is powered, the first relay coil is energized, the first relay normally open contact is closed, the vacuum pump motor working circuit is powered, and the red indicator light, green indicator light and buzzer are powered;

[0063] When the pressure of the vacuum sensor is normal, there is voltage at the second output terminal, the second relay coil is energized, the normally open contact of the second relay is closed, and the green indicator light is on. When the pressure is abnormal, there is no voltage at the second output terminal, the normally open contact of the second relay is disconnected, the green indicator light is off, the normally closed contact is closed, the red indicator light is on, and the buzzer alarm is on.

[0064] In the case of power failure, the vacuum pump motor control circuit has no power, the first relay coil is de-energized, the first relay normally open contact is disconnected, the vacuum pump motor working circuit has no power, and the red indicator light, green indicator light and buzzer have no power;

[0065] Based on the switching of the backup power module, the DC power supply is switched to the battery module. The vacuum sensor is always powered and can work normally. The user can understand the negative pressure state of the suction lifting equipment at this time. At the same time, the red alarm light and buzzer can continue to alarm based on the timing range of the timing power output interface. The green indicator light is off, which also indicates that the external power grid is out of power and the suction lifting equipment is in a stopped working state.

[0066] When the external power grid has electricity, the backup power module can charge the battery module. When the vacuum pressure is in normal condition, the green indicator light is on. When the vacuum pressure is in abnormal condition, the green indicator light is off, the red indicator light is on and the buzzer alarm is on, indicating that the negative pressure is insufficient. At this time, the vacuum pressure pump is in the suction state until the negative pressure is within the normal working threshold range, the green indicator light is on, the red indicator light is off and the buzzer stops ringing.

[0067] The vacuum sensor of the present application is always in a powered state. It can still work and display the negative pressure value when the power is off, thereby improving safety. The green indicator light, red indicator light and buzzer can prompt a low pressure alarm when there is power, and indicate that the device is in a power-off state when there is no power. It can also sound an alarm, further improving the intelligence and safety of the device.

[0068] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A control circuit for a suction and lifting device with a backup power supply, characterized in that: It includes a vacuum pump motor working circuit, a vacuum pump motor control circuit, a first relay, a second relay, a DC power supply, a backup power supply module, a battery module and a vacuum pressure monitoring module; The first relay comprises a first relay coil and a first relay normally open contact; The second relay comprises a second relay coil, a second relay normally open contact and a second relay normally closed contact; The vacuum pressure monitoring module includes a vacuum sensor, a red indicator light, a buzzer and a green indicator light; The backup power supply module includes a DC power input interface, a DC power output interface, a battery module input interface, a battery module charging interface and a timing power output interface; The DC power supply supplies power to the vacuum pump motor control circuit, and the DC power supply output interface supplies power to the vacuum pressure monitoring module; The vacuum pump motor working circuit is connected in series with the normally open contact of the first relay; The vacuum pump motor control circuit is connected in series with the first relay coil; The vacuum sensor comprises a vacuum sensor input terminal, a vacuum sensor output terminal 1 and a vacuum sensor output terminal 2; The second output terminal of the vacuum sensor is connected in series with the second relay coil; The normally open contact of the first relay is connected in series with the red indicator light, the buzzer and the green indicator light respectively; The normally open contact of the second relay is connected in series between the normally open contact of the first relay and the green indicator light; The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the red indicator light; The normally closed contact of the second relay is connected in series between the normally open contact of the first relay and the buzzer; The timing power supply output interface is connected in series with the red indicator light and the buzzer respectively, and the series circuit composed of the normally open contact of the first relay and the normally closed contact of the second relay is connected in parallel with the timing power supply output interface; When the vacuum sensor is abnormal, the second output terminal of the vacuum sensor has no voltage output; When the DC power input interface supplies power, the battery module input interface is disconnected, the battery module charging interface is turned on, and the timing power output interface is disconnected; When the DC power input interface is powered off, the battery module input interface is turned on, the battery module charging interface is disconnected, and the timing power output interface is turned on.

2. According to the control circuit of the suction and lifting equipment with a backup power supply according to claim 1, it is characterized in that: The vacuum pump motor working circuit includes a miniature circuit breaker, which is arranged between the normally open contact of the first relay and the external power grid.

3. The control circuit of the suction and lifting equipment with a backup power supply according to claim 1 is characterized in that: It comprises a thermal magnetic protection circuit breaker, which is connected in series to the vacuum pump motor working circuit, and the thermal magnetic protection circuit breaker is connected in series to the vacuum pump motor control circuit.

4. The control circuit of the suction and lifting equipment with a backup power supply according to claim 1 is characterized in that: The vacuum pump motor control circuit is connected in series with an INO self-locking power-on knob.

Images