CN111156186A - One-use one-standby two-equipment local/remote start-stop control circuit and method - Google Patents
One-use one-standby two-equipment local/remote start-stop control circuit and method Download PDFInfo
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- CN111156186A CN111156186A CN201911409626.7A CN201911409626A CN111156186A CN 111156186 A CN111156186 A CN 111156186A CN 201911409626 A CN201911409626 A CN 201911409626A CN 111156186 A CN111156186 A CN 111156186A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
Abstract
The invention discloses a local/remote start-stop control circuit and a method for one-use one-standby two devices. The one-use one-standby two-equipment on-site/remote start-stop control circuit and the method are easy to implement and can realize stable and reliable control.
Description
Technical Field
The invention relates to a one-use one-standby two-equipment on-site/remote start-stop control circuit and a method.
Background
The circuit diagram of the existing fan control is shown in figure 1, the existing fan control is controlled on the roof on site, and the existing fan control is controlled in a workshop remotely. The remote control of each fan is controlled by a start button and a stop button respectively, so that the remote control box is provided with two start buttons and two stop buttons. When workshop personnel start and stop the operation remotely, it is unclear whether the roof local switching knob is switched between the 1# fan and the 2# fan, so that an operator does not know which button to press to start and stop. Thus, switching logic is confused, and the control circuit is complicated.
Therefore, there is a need for a new one-use one-standby two-device on-site/remote start-stop control circuit and method.
Disclosure of Invention
The invention aims to solve the technical problem of providing a one-use one-standby two-equipment local/remote start-stop control circuit and a method, wherein the one-use one-standby two-equipment local/remote start-stop control circuit and the method are easy to implement and reliable in control.
The technical solution of the invention is as follows:
a one-use one-standby two-equipment local/remote start-stop control circuit comprises a start control circuit, a remote stop switch (SB2) and a stop control circuit which are connected in series between L and N;
(A) starting the control circuit:
the starting control circuit comprises 3 starting branches connected in parallel:
a remote starting button (SB1) is arranged in the first starting branch;
the second starting branch is used for starting control of the first equipment, in the second starting branch, a first local starting button (SB3) is connected with a normally open switch (KA1) of the first relay in parallel, and the normally open switch (KA1) of the first relay is a self-locking switch;
the third starting branch is used for starting control of the second equipment, a second local starting button (SB5) is connected with a normally open switch (KA2) of the second relay in parallel in the third starting branch, and the normally open switch (KA2) of the second relay is a self-locking switch;
(B) a stop control circuit:
the stop control circuit comprises a first stop branch and a second stop branch which are connected in parallel;
the first stop branch comprises a first local stop button (SB4) and a coil (J1) of a first relay which are connected in series; a coil (J1) of the first relay controls a normally open switch (KA1) of the first relay and the power supply of the first device;
the second stop branch comprises a second local stop button (SB6) and a coil (J2) of a second relay which are connected in series; a coil (J2) of the second relay controls a normally open switch (KA2) of the second relay and the power supply of the second equipment;
a third change-over switch (SA1C) is also connected in series in the first stopping branch; the second stopping branch is also connected with a fourth change-over switch (SA1D) in series. The third change-over switch (SA1C) and the fourth change-over switch (SA1D) are in a mutual exclusive relationship; i.e. the state of one switch is on, the state of the other switch is off.
A first change-over switch (SA1A) is also connected in series in the second starting branch; a second change-over switch (SA1B) is also connected in series in the third starting branch. The first change-over switch (SA1A) and the second change-over switch (SA1B) are in a mutually exclusive relationship; namely, the state of one switch is on, the state of the other switch is off, the first change-over switch (SA1A) and the second change-over switch (SA1B) respectively correspond to the third change-over switch (SA1C) and the fourth change-over switch (SA1D), namely, the states respectively keep the same, namely, the states of the first change-over switch (SA1A) and the third change-over switch (SA1C) are the same, and the states of the second change-over switch (SA1B) and the fourth change-over switch (SA1D) are the same, so that the reliability is improved.
The first change-over switch, the second change-over switch, the third change-over switch and the fourth change-over switch are two normally-open three-gear locking rotary switches and are used for selecting which equipment is started.
A first fault switch (K1) is also connected in series in the first stopping branch; a second fault switch (K2) is also connected in series in the second stopping branch. And the fault stop switch is a normally closed switch corresponding to the fault signal of the frequency converter, and when the frequency converter has a fault, the fan stops.
The first equipment and the second equipment are fans, one of the first equipment and the second equipment is standby equipment, and the other one of the first equipment and the second equipment is main equipment.
The local/remote start-stop control method for the one-use one-standby two devices is characterized in that the local/remote start-stop control circuit for the one-use one-standby two devices is adopted to implement local and remote start-stop control; the specific control mode is as follows:
firstly, field starting control:
(1) the main equipment starts:
keeping the state of the third change-over switch (SA1C) closed and the state of the fourth change-over switch (SA1D) open, after the first local starting button (SB3) is pressed, the first relay coil (J1) is electrified, the first equipment, namely the main equipment, is started, and the first relay normally-open switch (KA1) is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third change-over switch (SA1C) to be open and the state of the fourth change-over switch (SA1D) to be closed, and after the second local starting button (SB5) is pressed, the second relay coil (J2) is electrified, the second equipment, namely standby equipment, is started, and the second relay normally-open switch (KA2) is closed and self-locked;
II, secondly: remote start control:
(1) the main equipment starts:
keeping the state of the third selector switch (SA1C) closed and the state of the fourth selector switch (SA1D) open, after the remote start button (SB1) is pressed, the first relay coil (J1) is electrified, the first equipment is started, and the first relay normally-open switch (KA1) is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third selector switch (SA1C) to be open, keeping the state of the fourth selector switch (SA1D) to be closed, enabling the second relay coil (J2) to be electrified after the remote start button (SB1) is pressed, starting the second equipment, and enabling the second relay normally-open switch (KA2) to be closed and self-locked;
thirdly, stopping control on site:
(1) the main equipment stops:
when the first local stop button (SB4) is pressed, the first relay coil (J1) loses power, the first equipment stops, and the first relay normally-open switch (KA1) is opened to release self-locking;
(2) the standby equipment stops:
when the second local stop button (SB6) is pressed, the second relay coil (J2) loses power, the second equipment stops, and the second relay normally-open switch (KA2) is opened to release self-locking;
fourthly, remote stop control:
after the remote stop button (SB2) is pressed, the first relay coil (J1) and the second relay coil (J2) are both de-energized, the first equipment and the second equipment are both stopped, and the first relay normally-open switch (KA1) and the second relay normally-open switch (KA2) are both opened.
Has the advantages that:
the invention discloses a local/remote start-stop control circuit and a method for one-use one-standby two devices, which can realize remote control of two fans by improving a circuit, using a start button and a stop button and matching with a change-over switch, and has the advantages of simple circuit realization, clear control logic and high reliability.
Drawings
FIG. 1 is a diagram of a conventional control circuit;
FIG. 2 is a control circuit diagram of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the following figures and specific examples:
example 1: referring to fig. 2, the one-use one-standby two-equipment local/remote start-stop control circuit comprises a start control circuit, a remote stop switch SB2 and a stop control circuit which are connected in series between L and N;
(A) starting the control circuit:
the starting control circuit comprises 3 starting branches connected in parallel:
a remote starting button SB1 is arranged in the first starting branch;
the second starting branch is used for starting control of the first equipment, in the second starting branch, a first local starting button SB3 is connected in parallel with a normally open switch KA1 of the first relay, and the normally open switch KA1 of the first relay is a self-locking switch;
the third starting branch is used for starting control of the second equipment, a second local starting button SB5 is connected in parallel with a normally open switch KA2 of the second relay, and the normally open switch KA2 of the second relay is a self-locking switch;
(B) a stop control circuit:
the stop control circuit comprises a first stop branch and a second stop branch which are connected in parallel;
the first stop branch comprises a first local stop button SB4 and a coil J1 of a first relay which are connected in series; a coil J1 of the first relay controls a normally open switch KA1 of the first relay and power supply of the first equipment;
the second stop branch comprises a second local stop button SB6 and a coil J2 of a second relay which are connected in series; a coil J2 of the second relay controls a normally open switch KA2 of the second relay and power supply of the second equipment;
a third change-over switch SA1C is also connected in series in the first stopping branch; the second stopping branch is also connected in series with a fourth switch SA 1D. The third switch SA1C and the fourth switch SA1D are in a mutual exclusive relationship; i.e. the state of one switch is on, the state of the other switch is off.
A first switch SA1A is also connected in series in the second starting branch; the third starting branch is also connected with a second change-over switch SA1B in series. The first switch SA1A and the second switch SA1B are in a mutual exclusion relationship; i.e. the state of one switch is on, and the state of the other switch is off, the first switch SA1A and the second switch SA1B correspond to the third switch SA1C and the fourth switch SA1D, respectively, i.e. the states remain the same, i.e. the states of the first switch SA1A and the third switch SA1C are the same, and the states of the second switch SA1B and the fourth switch SA1D are the same, respectively, for increased reliability.
The first change-over switch, the second change-over switch, the third change-over switch and the fourth change-over switch are two normally-open three-gear locking rotary switches and are used for selecting which equipment is started.
A first fault switch K1 is also connected in series in the first stopping branch; a second fault switch K2 is also connected in series in the second stop branch. And the fault stop switch is a normally closed switch corresponding to the fault signal of the frequency converter, and when the frequency converter has a fault, the fan stops.
The first equipment and the second equipment are fans, one of the first equipment and the second equipment is standby equipment, and the other one of the first equipment and the second equipment is main equipment.
The local/remote start-stop control method for the one-use one-standby two devices is characterized in that the local/remote start-stop control circuit for the one-use one-standby two devices is adopted to implement local and remote start-stop control; the specific control mode is as follows:
firstly, field starting control:
(1) the main equipment starts:
keeping the state of the third switch SA1C closed and the state of the fourth switch SA1D open, after the first local starting button SB3 is pressed, the first relay coil J1 is electrified, the first equipment, namely the main equipment, is started, and the first relay normally-open switch KA1 is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third switch SA1C to be open, keeping the state of the fourth switch SA1D to be closed, and after the second local starting button SB5 is pressed, the second relay coil J2 is electrified, the second equipment, namely standby equipment, is started, and the second relay normally-open switch KA2 is closed and self-locked;
II, secondly: remote start control:
(1) the main equipment starts:
keeping the state of the third switch SA1C closed and the state of the fourth switch SA1D open, after the remote start button SB1 is pressed, the first relay coil J1 is electrified, the first device is started, and the first relay normally-open switch KA1 is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third switch SA1C to be open, keeping the state of the fourth switch SA1D to be closed, enabling the second relay coil J2 to be electrified after the remote start button SB1 is pressed, starting the second equipment, and closing the second relay normally-open switch KA2 for self-locking;
thirdly, stopping control on site:
(1) the main equipment stops:
after the first in-place stop button SB4 is pressed, the first relay coil J1 loses power, the first equipment stops, and the first relay normally open switch KA1 is disconnected to release the self-locking;
(2) the standby equipment stops:
after the second local stop button SB6 is pressed, the second relay coil J2 loses power, the second equipment stops, and the second relay normally open switch KA2 is disconnected to release self-locking;
fourthly, remote stop control:
after the remote stop button SB2 is pressed, the first relay coil J1 and the second relay coil J2 are both de-energized, the first device and the second device are both stopped, and the first relay normally-open switch KA1 and the second relay normally-open switch KA2 are both opened.
After the field cabinet switches the 1# fan and the 2# fan, the fan can be controlled by pressing a start/stop button on the remote control box; the switch of KA1 is used for starting the 1# frequency converter, and the switch of KA2 is used for starting the 2# frequency converter.
Claims (6)
1. An on-site/remote start-stop control circuit for one-use-one-standby two-equipment is characterized by comprising a start control circuit, a remote stop switch (SB2) and a stop control circuit which are connected in series between L and N;
(A) starting the control circuit:
the starting control circuit comprises 3 starting branches connected in parallel:
a remote starting button (SB1) is arranged in the first starting branch;
the second starting branch is used for starting control of the first equipment, in the second starting branch, a first local starting button (SB3) is connected with a normally open switch (KA1) of the first relay in parallel, and the normally open switch (KA1) of the first relay is a self-locking switch;
the third starting branch is used for starting control of the second equipment, a second local starting button (SB5) is connected with a normally open switch (KA2) of the second relay in parallel in the third starting branch, and the normally open switch (KA2) of the second relay is a self-locking switch;
(B) a stop control circuit:
the stop control circuit comprises a first stop branch and a second stop branch which are connected in parallel;
the first stop branch comprises a first local stop button (SB4) and a coil (J1) of a first relay which are connected in series; a coil (J1) of the first relay controls a normally open switch (KA1) of the first relay and the power supply of the first device;
the second stop branch comprises a second local stop button (SB6) and a coil (J2) of a second relay which are connected in series; a coil (J2) of the second relay controls a normally open switch (KA2) of the second relay and the power supply of the second equipment;
a third change-over switch (SA1C) is also connected in series in the first stopping branch; the second stopping branch is also connected with a fourth change-over switch (SA1D) in series.
2. A one-use one-standby two-equipment on-site/remote start-stop control circuit according to claim 1, characterized in that a first change-over switch (SA1A) is also connected in series in the second start-up branch; a second change-over switch (SA1B) is also connected in series in the third starting branch.
3. A one-use one-standby two-equipment on-site/remote start-stop control circuit as claimed in claim 2, wherein the first change-over switch, the second change-over switch, the third change-over switch and the fourth change-over switch are two normally open three-gear locking rotary switches, and are used for selecting which equipment is started.
4. A one-use one-standby two-equipment on-site/remote start-stop control circuit according to claim 2 or 3, characterized in that a first fault switch (K1) is also connected in series in the first stop branch; a second fault switch (K2) is also connected in series in the second stopping branch.
5. The on-site/remote start-stop control circuit for one-use one-standby two devices according to claim 1, wherein the first device and the second device are both fans, one of which is a standby device and the other is a main device.
6. An on-site/remote start-stop control method for one-use one-standby two-equipment is characterized in that the on-site/remote start-stop control circuit for one-use one-standby two-equipment is adopted to implement on-site and remote start-stop control; the specific control mode is as follows:
firstly, field starting control:
(1) the main equipment starts:
keeping the state of the third change-over switch (SA1C) closed and the state of the fourth change-over switch (SA1D) open, after the first local starting button (SB3) is pressed, the first relay coil (J1) is electrified, the first equipment, namely the main equipment, is started, and the first relay normally-open switch (KA1) is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third change-over switch (SA1C) to be open and the state of the fourth change-over switch (SA1D) to be closed, and after the second local starting button (SB5) is pressed, the second relay coil (J2) is electrified, the second equipment, namely standby equipment, is started, and the second relay normally-open switch (KA2) is closed and self-locked;
II, secondly: remote start control:
(1) the main equipment starts:
keeping the state of the third selector switch (SA1C) closed and the state of the fourth selector switch (SA1D) open, after the remote start button (SB1) is pressed, the first relay coil (J1) is electrified, the first equipment is started, and the first relay normally-open switch (KA1) is closed and self-locked;
(2) starting the standby equipment:
keeping the state of the third selector switch (SA1C) to be open, keeping the state of the fourth selector switch (SA1D) to be closed, enabling the second relay coil (J2) to be electrified after the remote start button (SB1) is pressed, starting the second equipment, and enabling the second relay normally-open switch (KA2) to be closed and self-locked;
thirdly, stopping control on site:
(1) the main equipment stops:
when the first local stop button (SB4) is pressed, the first relay coil (J1) loses power, the first equipment stops, and the first relay normally-open switch (KA1) is opened to release self-locking;
(2) the standby equipment stops:
when the second local stop button (SB6) is pressed, the second relay coil (J2) loses power, the second equipment stops, and the second relay normally-open switch (KA2) is opened to release self-locking;
fourthly, remote stop control:
after the remote stop button (SB2) is pressed, the first relay coil (J1) and the second relay coil (J2) are both de-energized, the first equipment and the second equipment are both stopped, and the first relay normally-open switch (KA1) and the second relay normally-open switch (KA2) are both opened.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911409626.7A CN111156186B (en) | 2019-12-31 | 2019-12-31 | One-use one-standby two-equipment local/remote start-stop control circuit and method |
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| CN201911409626.7A CN111156186B (en) | 2019-12-31 | 2019-12-31 | One-use one-standby two-equipment local/remote start-stop control circuit and method |
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| CN111156186B CN111156186B (en) | 2022-02-11 |
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