CN209801163U - Switching system capable of freely switching remote control and local control without stopping - Google Patents

Abstract

The utility model discloses a switch system capable of freely switching remote and local control without stopping, which comprises a signal source switch, a remote starting signal source, a local starting signal source, a stopping signal source, a starting output, a remote stopping signal source, a local stopping signal source and a stopping output, wherein the remote starting signal source is connected with the local starting signal source in parallel and then connected with the stopping signal source in series, the input end of the remote starting signal source is electrically connected with the output end of a signal source switch, the output end of the stopping signal source is electrically connected with the input end of a starting output, and the input end of the signal source switch is; the remote stop signal source is connected with the local stop signal source in parallel, the input end of the remote stop signal source is electrically connected with the output end of the signal source switch, the output end of the remote stop signal source is electrically connected with the output end of the stop output signal source, and the stop output end of the remote stop signal source is connected with the other end of the power supply connected with the signal source. The utility model discloses can realize not shutting down the conversion between long-range and the local control at the in-process of the electrical apparatus operation of controlling, have simple structure, control safe and reliable's characteristics.

Description

Switching system capable of freely switching remote control and local control without stopping

Technical Field

The utility model belongs to the technical field of the switch, concretely relates to switching system that simple structure, control safe and reliable's incessant can freely change long-range and local control.

background

In China, the economic growth is high, particularly in recent years, the continuous and stable development of the industries such as metallurgy, petrifaction, petroleum, chemical fertilizer and the like is realized, the transportation cost is higher and higher along with the price increase of energy sources, and compared with other transportation (such as railways and highways), the method for conveying solid materials by utilizing hydraulic pipelines has the advantages of short transportation distance, less capital investment, terrain adaptation, utilization of altitude difference potential energy, no or less land occupation, no environmental pollution, no external condition interference, capability of realizing continuous operation, reliable technology, capability of realizing the transportation cost of 1/6-1/10 of railways and highways and the like, and the sustainable development of economy and environment is realized. A plurality of pump stations are built in a slurry pipeline pumping system in the prior art, and slurry materials are continuously conveyed in a long distance through a booster pump of each pump station.

For example, a slurry pipeline has 18 pressurizing pumps, wherein 2 groups of pressurizing pumps in one pump station respectively convey ore pulp to two pipelines, and each group has 3 pressurizing pumps, and in the actual operation process, the 3 pressurizing pumps generally operate simultaneously and adjust the speed simultaneously. As shown in fig. 1, each pressurizing pump is provided with a change-over switch on a cabinet door, and when the change-over switch is turned to the left position, the pins 1-2 are conducted, so that the pressurizing pumps are remotely controlled; when the change-over switch is turned to the right position, the 3-4 pins are conducted, and local control is realized; when the change-over switch is turned to the middle position, all the feet are disconnected, the starting and stopping of the related equipment are not allowed, and the equipment can be operated in a corresponding mode only when the change-over switch is in remote or local control. As shown in fig. 2, in the existing system, when the transfer switch is in a remote control state, the remote signal switch 11 is turned on, and at this time, the equipment can be started by the remote start signal source 12, the remote start signal source 12 is a pulse signal sent by an operator through a human-computer interface, the remote start output 15 is turned on, and meanwhile, the remote start self-lock 13 is turned on, and the equipment starts to operate. The remote local change-over switch on the on-site cabinet door is changed into remote control, an operator controls the remote local change-over switch through a human-computer interface, relevant information can be checked on site, but relevant operation cannot be carried out, at the moment, all auxiliary motors and main equipment of the pressure pump are not controlled on site, when the pressure pump gives out relevant alarm and needs to be changed into local control to carry out parameter modification or stop a pressure pump alone, and the like, if the change-over switch is directly changed into the local, the system is equivalently directly stopped from a high-speed running state immediately, the damage to the equipment is large, and under the same condition, the change-over switch cannot be changed into a remote state when the system runs locally. Therefore, it is necessary to reduce the pump speed of the whole pressurizing pumps of the entire pump station while continuously maintaining the remote control, and it is necessary to reduce the pump speed to 5HZ for 3 pressurizing pumps, then stop the pressurizing pumps remotely, increase the pump speed of the other pressurizing pumps, continue the operation, and remove the faulty pumps to perform the inspection process, thereby limiting the free operation switching mode of the pressurizing pumps.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem and not enough to prior art exist provides a simple structure, control safe and reliable's the on-off system that can freely change long-range and local control of not shutting down.

The utility model discloses a realize like this: the remote start signal source and the local start signal source are connected in parallel and then connected in series with the stop signal source, the input end of the remote start signal source is electrically connected with the output end of the signal source switch, the output end of the stop signal source is electrically connected with the input end of the start output, and the input end of the signal source switch and the output end of the start output are respectively connected with two ends of the power supply; the remote stop signal source is connected with the local stop signal source in parallel, the input end of the remote stop signal source is electrically connected with the output end of the signal source switch, the output end of the remote stop signal source is electrically connected with the output end of the stop output, and the output end of the stop output is connected with the other end of the power supply connected with the signal source switch.

The utility model discloses a signal source switch and the series connection of parallelly connected remote start signal source and local start signal source can realize remote start and local start process auto-lock, no matter be the same auto-lock in the system can both be realized to remote control or the start instruction that local control sent promptly, and the system all can continue to keep the running state when change over switch switches over between local to long-range, long-range to local, has realized change over switch's free switching. Therefore, the utility model has the characteristics of simple structure, control safe and reliable.

Drawings

FIG. 1 is a schematic diagram of a prior art transfer switch;

FIG. 2 is a schematic diagram of a prior art start-up control scheme;

FIG. 3 is a schematic view of the present invention;

In the figure: 1-signal source switch, 2-remote start signal source, 3-local start signal source, 4-stop signal source, 5-start output, 6-remote stop signal source, 7-local stop signal source, 8-stop output, 9-start self-lock, 11-remote signal switch, 12-remote start signal source, 13-remote start self-lock, 14-remote stop signal source, 15-remote start output, 16-local signal switch, 17-local start signal source, 18-local start self-lock, 19-local stop signal source, 20-local start output.

Detailed Description

the present invention is further described with reference to the following drawings and examples, but the present invention is not limited thereto in any way, and any modification or improvement based on the teaching of the present invention is within the protection scope of the present invention.

As shown in fig. 3, the utility model discloses a signal source switch 1, remote start signal source 2, local start signal source 3, stop signal source 4, start output 5, remote stop signal source 6, local stop signal source 7, stop output 8, remote start signal source 2 and local start signal source 3 are parallelly connected the back and are established ties with stop signal source 4 and the input is connected with the output electricity of signal source switch 1, the output of stop signal source 4 is connected with the input electricity of start output 5, the input of signal source switch 1 and the output of start output 5 are connected with the both ends of power respectively; the remote stop signal source 6 is connected in parallel with the local stop signal source 7, the input end of the remote stop signal source is electrically connected with the output end of the signal source switch 1, the output end of the remote stop signal source is electrically connected with the input end of the stop output 8, and the output end of the stop output 8 is connected with the other end of the power supply connected with the signal source switch 1.

The signal source switch 1 is connected in series with the remote start signal source 2 and the local start signal source 3 which are connected in parallel, the signal source switch 1, the remote start signal source 2 and the local start signal source 3 which are connected in series are also connected in parallel with a start self-lock 9, and the start self-lock 9 is coupled with the start output 5.

The starting output 5 is a coil of the relay KA1 and is connected with a starting circuit of the controlled equipment corresponding to a contact, and the starting self-locking 9 is a normally open contact of the relay KA 1.

The stop output 8 is a coil of the relay KA2 and is connected with a stop circuit of a controlled device corresponding to a contact, and the stop signal source 4 is a normally closed contact of the relay KA 2.

The signal source switch 1 is a control start-stop switch, and the remote start signal source 2 and the remote stop signal source 6 are two interlocked normally open contacts of a controller connected with a remote control end network.

The local starting signal source 3 and the local stopping signal source 7 are two output contacts of a two-position rotary switch.

The signal source switch 1, the remote start signal source 2, the local start signal source 3, the start output 5, the remote stop signal source 6, the local stop signal source 7 and the stop output 8 are respectively connected in series with a signal indicator lamp.

The power supply is a 48v direct current power supply.

The utility model discloses a working process:

As shown in fig. 3, when the signal source switch 1 is set to 1, remote control is performed, when the signal source switch 0 is set to 0, local control is performed, then the output 5 is started to output a start signal through a start command of the remote start signal source 2 or the local start signal source 3, and the self-lock 9 is started to perform self-lock of the signal source switch 1, at the same time, when the change-over switch is changed from the local control to the remote control again, the change-over switch is not stopped when the remote control is changed to the local control, and the change-. Similarly, in order to realize the uniformity of the stop, the equipment can be effectively operated under the condition of local control or remote control, when the equipment receives the stop signal of the remote stop signal source 6 or the local stop signal source 7, the stop output 8 is disconnected, the stop signal source 4 is set to be 1, the start output 5 is disconnected, and the equipment stops.

Claims (8)

1. A switching system capable of freely converting remote control and local control without shutdown is characterized by comprising a signal source switch (1), a remote starting signal source (2), a local starting signal source (3), a stopping signal source (4), a starting output (5), a remote stopping signal source (6), a local stopping signal source (7) and a stopping output (8), wherein the remote starting signal source (2) is connected with the local starting signal source (3) in parallel and then connected with the stopping signal source (4) in series, the input end of the remote starting signal source is electrically connected with the output end of the signal source switch (1), the output end of the stopping signal source (4) is electrically connected with the input end of the starting output (5), and the input end of the signal source switch (1) and the output end of the starting output (5) are respectively connected with two ends of; the remote stop signal source (6) is connected with the local stop signal source (7) in parallel, the input end of the remote stop signal source is electrically connected with the output end of the signal source switch (1), the output end of the remote stop signal source is electrically connected with the input end of the stop output (8), and the output end of the stop output (8) is connected with the other end of the power supply connected with the signal source switch (1).

2. the non-stop switching system capable of freely switching between remote control and local control according to claim 1, wherein the signal source switch (1) is connected in series with the remote start signal source (2) and the local start signal source (3) which are connected in parallel, the signal source switch (1), the remote start signal source (2) and the local start signal source (3) which are connected in series are further connected in parallel with a start self-lock (9), and the start self-lock (9) is coupled with the start output (5).

3. The uninterruptible freely switchable remote and local control switch system according to claim 2, characterized in that the enabling output (5) is a coil of a relay KA1 and the corresponding contact is connected to the enabling circuit of the controlled device, and the enabling latching (9) is a normally open contact of a relay KA 1.

4. the uninterruptible freely switchable remote and local control switching system according to claim 1, 2 or 3, characterized in that the stop output (8) is a coil of a relay KA2 and the corresponding contact is connected to the stop circuit of the controlled device, the stop signal source (4) being a normally closed contact of a relay KA 2.

5. The uninterruptible freely convertible remote and local control switch system according to claim 4, characterized in that the signal source switch (1) is a control start/stop switch, and the remote start signal source (2) and the remote stop signal source (6) are two interlocked normally open contacts of a controller connected to a remote control network.

6. The system according to claim 4, wherein the local start signal source (3) and the local stop signal source (7) are two output contacts of a two-position rotary switch.

7. The uninterruptible switching system capable of freely switching between remote control and local control according to claim 4, wherein the circuit output ends of the signal source switch (1), the remote start signal source (2), the local start signal source (3), the start output (5), the remote stop signal source (6), the local stop signal source (7) and the stop output (8) are respectively connected in series with a signal indicator lamp.

8. The system according to claim 4, wherein said power source is a DC power source.