CN215912050U - Starting circuit and equipment using same - Google Patents
Starting circuit and equipment using same Download PDFInfo
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- CN215912050U CN215912050U CN202121174375.1U CN202121174375U CN215912050U CN 215912050 U CN215912050 U CN 215912050U CN 202121174375 U CN202121174375 U CN 202121174375U CN 215912050 U CN215912050 U CN 215912050U
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Abstract
The application provides a starting circuit and a device using the same. The starting circuit is electrically connected between a power supply and equipment, the starting circuit comprises a starting unit, an alarming unit and a time delay unit which are connected in parallel, the starting unit comprises a first switch and a relay which are connected in series, the alarming unit comprises a second switch and an alarm which are connected in series, the time delay unit comprises a third switch and a switch group which are connected in series, the third switch is a time delay switch, the equipment and the time delay unit are connected in series between the live wire and the zero wire, wherein after the first switch is closed, the relay is electrified to keep self-locking, and meanwhile, the second switch is controlled to be closed, so that the alarm is electrified to send out alarming information; the relay is also used for controlling the third switch to be closed in a delayed mode; when the third switch and the switch set are both closed, the device is started. The starting circuit provided by the application has the functions of starting interlock and delay limited starting.
Description
Technical Field
The present application relates to the field of circuits, and more particularly, to a start circuit and an apparatus using the same.
Background
The existing large-scale equipment (such as a large-scale punching machine, a large-scale injection molding machine or a stirring machine) is often started without warning due to misoperation or human error, so that the operation casualty of field operation personnel is caused, and great hidden dangers are brought to safety production.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a start circuit to issue warning information before the start of the apparatus and to restrict the immediate start to improve the safety at the start of the apparatus.
The utility model provides an aspect provides a starting circuit, the electricity is connected between power and equipment, starting circuit includes parallel connection's starting unit, warning unit and delay unit, starting unit includes first switch and relay of series connection between live wire and zero line, warning unit includes second switch and attention device of series connection between live wire and zero line, delay unit includes third switch and the switch block of series connection between live wire and zero line, the third switch is delay switch, equipment and delay unit series connection between live wire and zero line, wherein, when first switch closes the back, the relay circular telegram keeps the auto-lock, controls simultaneously the second switch is closed, makes the attention device circular telegram send out warning information; the relay is also used for controlling the third switch to be closed in a delayed mode; the device starts when both the third switch and the set of switches are closed.
Further, the first switch and the second switch are normally open switches.
Further, the warning unit further comprises a fourth switch, the fourth switch is connected with the second switch and the warning device in series, and the fourth switch is used for being disconnected after the preset time.
Further, the fourth switch is a time-delay disconnection switch.
Furthermore, the first switch and the switch group are self-locked after being electrified so as to keep a long-time closed state, and the open state is not recovered until the power failure.
Furthermore, the starting unit further comprises a first contact coil and a first normally open contact, the first switch is connected with the first contact coil in series, the first normally open contact is connected with the first switch in parallel, and when the first switch is closed, the first contact coil is electrified, so that the first normally open contact is attracted and conducted.
Further, the starting unit further includes a fifth switch electrically connected between the first switch and the relay for stopping the starting circuit.
Furthermore, the delay unit further comprises a second contact coil, a third contact coil, a second normally open contact and a third normally open contact, the switch group comprises two start switches connected in series, the second contact coil and the third contact coil are respectively connected in series with the two start switches, the second normally open contact and the third normally open contact are respectively connected in parallel with the two start switches, and when the switch group is closed, the second contact coil and the third contact coil are electrified, so that the second normally open contact and the third normally open contact are attracted and switched on.
Further, the delay unit further includes a sixth switch electrically connected between the switch group and the device, for stopping the device.
In another aspect, the present application also provides an apparatus comprising a start circuit as described in any one of the above.
The starting circuit provided by the application is characterized in that the starting unit, the warning unit and the delay unit are arranged in an interlocking manner, so that the fact that warning information is not sent out by a warning device is realized, the third switch is not closed, or when a switch group is not closed, the equipment cannot be directly started, the delay starting of the equipment is forced, and the situation that field workers have enough protection time before the equipment is started is guaranteed.
Drawings
Fig. 1 is a circuit block diagram of a starting circuit according to an embodiment of the present application.
Fig. 2 is a schematic circuit diagram of the starting circuit shown in fig. 1.
Description of the main elements
Starting circuit 100
Starting unit 10
First switch S1
Relay KT
Fifth switch S5
First contact coil KM1
First normally open contact KT1
Second switch S2
Warning indicator HL
Fourth switch S4
Third switch S3
Switch set SD
Sixth switch S6
Second contact coil KM2
Third contact coil KM3
Second normally open contact KT2
Third normally open contact KT3
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments in the present application, are within the scope of protection of the present application.
Referring to fig. 1, the present embodiment provides a starting circuit 100 electrically connected between a power source 200 and a device 300 for safely starting the device 300.
It is understood that the apparatus 300 may be a large-scale apparatus such as a concrete mixer, an excavator, a large-scale press, a large-scale injection molding machine, and the like. The power supply 200 may be an ac power supply.
Referring to fig. 2, the starting circuit 100 and the device 300 are electrically connected between the live line L and the neutral line N of the power supply 200, and when the starting circuit 100 and the device 300 are powered on, the device 300 can be safely started.
In an alternative embodiment, the starting circuit 100 includes a starting unit 10, an alerting unit 20 and a delay unit 30 connected in parallel for realizing a safe start of the apparatus 300.
In an alternative embodiment, the starting unit 10 comprises a first switch S1 and a relay KT connected in series between the live line L and the neutral line N for opening the starting circuit 100.
Wherein the first switch S1 is a normally open switch. That is, the first switch S1 is normally open and closed when it is energized. The relay KT is electrified and self-locked, can keep a closed state for a long time, and is not disconnected until power failure.
The warning unit 20 comprises a second switch S2 and a warning indicator HL connected in series between the live wire L and the zero wire N, and is used for sending warning information.
The second switch S2 is also a normally open switch. The second switch S2 is closed to be turned on or off under the control of the relay KT. For example, when the relay KT is powered on, the second switch S2 is closed under the control of the relay KT; when the relay KT is powered off, the second switch S2 is turned off under the control of the relay KT.
The alarm HL can send out alarm information after being electrified.
The delay unit 30 includes a third switch S3 and a switch group SD connected in series between the live wire and the neutral wire, and is used for delay-limited starting.
Wherein the third switch S3 is a time-delay closed switch. That is, the third switch S3 is normally opened and closed after being turned on, with a delay of a predetermined time (e.g., 10S). Wherein the third switch S3 is closed to be switched on or switched off under the control of the relay KT. For example, when the relay KT is powered on, the third switch S3 is powered on and is closed after the preset time; when the relay KT is powered off, the third switch S3 is powered off and is immediately turned off.
In this embodiment, the switch set SD includes two start switches connected in series. It will be appreciated that the activation switch is typically carried out by a push button, which is a push-to-actuate, release, or reset switch. Thus, the switch group SD constitutes a two-hand start switch. During the use, need both hands to press the two switch sets SD, just can start equipment 300 to avoid the potential safety hazard that operating personnel exists when the limit operation machine is started.
It is understood that the operation principle of the starting circuit 100 is as follows:
when the first switch S1 is closed, the relay KT is electrified to keep self-locking, and meanwhile, the second switch S2 is controlled to be closed, so that the alarm HL is electrified to send out alarm information; the relay KT is further used for controlling the third switch S3 to be closed in a time delay manner; when the third switch S3 and the switch set SD are both closed, the device 300 starts. As such, the apparatus 300 cannot be directly activated without the operation of the alarm HL emitting an alarm message and closing the third switch S3 and the switch set SD.
In an alternative embodiment, the warning unit 20 further includes a fourth switch S4. The fourth switch S4 is connected in series with the second switch S2 and the alarm HL. The fourth switch S4 is configured to turn off after the preset time elapses, so that the alarm HL stops sending the alarm information.
It is to be understood that the fourth switch S4 is a time delay disconnect switch. That is, the fourth switch S4 is normally closed, and is turned off after being turned on for a predetermined time.
It is understood that the first switch S1 and the switch set SD can be self-locked after being powered on to maintain a closed state for a long time, and the open state is not recovered until the power is off, so that the operator does not have to maintain the closed state of the first switch S1 and the switch set SD manually.
It is to be understood that the starting unit 10 further includes a contactor (not shown) including a first contact coil KM1 and a first normally open contact KT 1. According to the electromagnetic induction principle, when the first contact coil KM1 is electrified, the first normally open contact KT1 in the contactor can be attracted and conducted.
In the present embodiment, the first contact coil KM1 is connected in series with the first switch S1, and the first normally open contact KT1 is connected in parallel with the first switch S1. When the first switch S1 is closed, the first contact coil KM1 is energized, so that the first normally open contact KT1 is attracted and conducted. In this way, even if the operator does not manually maintain the closed state of the first switch S1 any more, both ends of the first switch S1 may still be turned on, so that the starting circuit 100 operates normally.
It is understood that the delay unit 30 further includes two contactors (not shown). Namely, the delay unit 30 further includes a second contact coil KM2, a third contact coil KM3, a second normally open contact KT2 and a third normally open contact KT 3. According to the electromagnetic induction principle, when the second contact coil KM2 is electrified, the second normally open contact KT2 can be attracted and conducted; when the third contact coil KM3 is electrified, the third normally open contact KT3 can be attracted and conducted.
In this embodiment, the second contact coil KM2 and the third contact coil KM3 are respectively connected in series with two starting switches in the switch group SD, and the second normally-open contact KT2 and the third normally-open contact KT3 are respectively connected in parallel with the two starting switches. When the switch group SD is closed, the second contact coil KM2 and the third contact coil KM3 are energized, so that the second normally open contact KT2 and the third normally open contact KT3 are attracted and conducted. In this way, even if the operator does not manually maintain the closed state of the switch set SD any more, both ends of the switch set SD can still be conducted, so that the starting circuit 100 can normally operate.
In an alternative embodiment, the starting unit 10 further comprises a fifth switch S5. The fifth switch S5 is electrically connected between the first switch S1 and the relay KT for stopping the starting circuit 100. It is understood that when the fifth switch S5 is turned off, the start circuit 100 stops operating.
In an alternative embodiment, the delay unit 30 further includes a sixth switch S6. The sixth switch S6 is electrically connected between the switch group SD and the device 300, and is used to stop the device 300. It will be appreciated that when the sixth switch S6 is open, the device 300 is disconnected from the start circuit 100, thereby ceasing operation.
Wherein the fifth switch S5 and the sixth switch S6 are both emergency stop button switches. It will be appreciated that the scram button switch is typically implemented by a push button that is depressed to quickly stop or release some of the drive components, and released after approximately 45 clockwise rotation to release the push button for restart.
It is understood that in other embodiments, the power supply 200 may be a dc power supply. In this manner, the starting circuit 100 and the device 300 are electrically connected between the positive and negative poles of the power source 200.
It is understood that the alarm HL can be an alarm light and/or a buzzer. The alarm HL can also be a voice playing module and is used for playing audio.
It can be understood that the starting circuit 100 provided by the present application, by providing the starting unit 10, the starting unit 10 being provided with the relay KT, and the warning unit 20 and the delay unit 30 being provided with the second switch S2 and the third switch S3, respectively, forms an interlock circuit, such that when the first switch S1 is closed, the second switch S2 and the third switch S3 can be simultaneously controlled to be energized, so that the starting unit 10, the warning unit 20 and the delay unit 30 can simultaneously start to operate, thereby implementing an interlock starting function; the starting circuit 100 further interlocks the starting unit 10, the warning unit 20 and the delay unit 30 to realize that the device 300 cannot be directly started when the warning indicator HL does not send warning information, the third switch S3 is not closed, or the switch group SD is not closed, so as to ensure that a field worker has enough protection time before the device 300 is started.
It should be emphasized that the above-described embodiments are merely preferred examples of the application, rather than limitations of the application in any way, and all simple modifications, equivalent variations and modifications that can be made to the above-described embodiments according to the technical spirit of the application are intended to be included within the scope of the application.
Claims (10)
1. A starting circuit electrically connected between a power source and a device, characterized by: the starting circuit comprises a starting unit, a warning unit and a time delay unit which are connected in parallel, the starting unit comprises a first switch and a relay which are connected in series between a live wire and a zero wire, the warning unit comprises a second switch and a warning device which are connected in series between the live wire and the zero wire, the time delay unit comprises a third switch and a switch group which are connected in series between the live wire and the zero wire, the third switch is a time delay switch, the equipment and the time delay unit are connected in series between the live wire and the zero wire, and after the first switch is closed, the relay is electrified to keep self-locking, and meanwhile, the second switch is controlled to be closed, so that the warning device is electrified to send warning information; the relay is also used for controlling the third switch to be closed in a delayed mode; the device starts when both the third switch and the set of switches are closed.
2. The start circuit of claim 1, wherein: the first switch and the second switch are normally open switches.
3. The start circuit of claim 1, wherein: the warning unit further comprises a fourth switch, the fourth switch is connected with the second switch and the warning device in series, and the fourth switch is used for being disconnected after the preset time.
4. A starting circuit as claimed in claim 3, wherein: the fourth switch is a time-delay disconnection switch.
5. The start circuit of claim 1, wherein: the first switch and the switch set are self-locked after being electrified so as to keep a long-time closed state, and the open state is not recovered until the power failure.
6. The start circuit of claim 5, wherein: the starting unit further comprises a first contact coil and a first normally open contact, the first switch is connected with the first contact coil in series, the first normally open contact is connected with the first switch in parallel, and when the first switch is closed, the first contact coil is electrified to enable the first normally open contact to be attracted and conducted.
7. The start circuit of claim 6, wherein: the starting unit further includes a fifth switch electrically connected between the first switch and the relay for stopping the starting circuit.
8. The start circuit of claim 5, wherein: the time delay unit further comprises a second contact coil, a third contact coil, a second normally open contact and a third normally open contact, the switch group comprises two starting switches connected in series, the second contact coil and the third contact coil are respectively connected with the two starting switches in series, the second normally open contact and the third normally open contact are respectively connected with the two starting switches in parallel, and when the switch group is closed, the second contact coil and the third contact coil are electrified, so that the second normally open contact and the third normally open contact are attracted and switched on.
9. The start circuit of claim 8, wherein: the delay unit further comprises a sixth switch, and the sixth switch is electrically connected between the switch group and the equipment and used for stopping the equipment.
10. An apparatus, characterized by: the device comprising a start circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121174375.1U CN215912050U (en) | 2021-05-28 | 2021-05-28 | Starting circuit and equipment using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121174375.1U CN215912050U (en) | 2021-05-28 | 2021-05-28 | Starting circuit and equipment using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215912050U true CN215912050U (en) | 2022-02-25 |
Family
ID=80287277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121174375.1U Active CN215912050U (en) | 2021-05-28 | 2021-05-28 | Starting circuit and equipment using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215912050U (en) |
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2021
- 2021-05-28 CN CN202121174375.1U patent/CN215912050U/en active Active
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