CN213206015U - Centrifugal pump automatic switching control equipment based on PLC - Google Patents

Abstract

The utility model relates to a water pump automatic switching equipment, in particular to a PLC-based centrifugal pump automatic switching device, which solves the technical problems in the background technology, comprises a first relay, a second relay, a third relay and a PLC controller, and an infrared temperature tester and a vibration tester are arranged at the thrust bearings of pump bodies of an A pump, a B pump and a C pump; the signal input end of the PLC is connected with a manual and automatic change-over switch; the signal output ends of the infrared temperature tester and the vibration tester of the pump A, the pump B and the pump C are respectively connected to the signal input end of the PLC through switches; and the signal output end of the PLC is connected to the signal input ends of the first relay, the second relay and the third relay. The centrifugal pump debugging device can be used for manually debugging each centrifugal pump, can be used for automatically switching different centrifugal pumps according to working time, temperature or vibration data, avoids long working time of a single centrifugal pump, and avoids damage to a thrust bearing, a motor and a pump body of the centrifugal pump.

Description

Centrifugal pump automatic switching control equipment based on PLC

Technical Field

The utility model relates to a water pump automatic switch-over equipment specifically is a centrifugal pump automatic switch-over device based on PLC.

Background

In the colliery, the coal water treatment station often is provided with many centrifugal pumps each other and is the reserve pump, say that a certain coal water treatment station is provided with three centrifugal pumps, be the A pump respectively, B pump and C pump, in the course of the work, because artifical supervision difficulty or switching pump are untimely, the bearing temperature is higher often to the centrifugal pump, the pump body vibration is great, the easy trouble such as damaging of thrust bearing, the on-the-spot inspection discovery above-mentioned trouble appears mainly because single centrifugal pump operating time is longer, cause the thrust bearing to generate heat easily, wearing and tearing, consequently, the automatic switching control equipment who designs a centrifugal pump is imperative.

Disclosure of Invention

The utility model discloses it is untimely to aim at many centrifugal pumps switch in the coal water treatment station, leads to the centrifugal pump often to appear the technical problem of faults such as bearing temperature is higher, pump body vibration is great, thrust bearing damages easily, provides a centrifugal pump automatic switching control equipment based on PLC.

The utility model provides a technical means that its technical problem adopted is: a centrifugal pump automatic switching device based on PLC comprises a first relay KM1, a second relay KM2, a third relay KM3 and a PLC controller, wherein a manual debugging program, an automatic control program, a timing pump switching program, a vibration data comparison program and a temperature data comparison program are arranged in the PLC controller, normally open contacts of the first relay KM1, the second relay KM2 and the third relay KM3 are respectively connected among a pump A, a pump B and a pump C and a power supply, and an infrared temperature tester and a vibration tester are installed at thrust bearings of pump bodies of the pump A, the pump B and the pump C; the signal input end of the PLC is connected with a change-over switch of a manual control mode and an automatic control mode; the signal output ends of the infrared temperature tester and the vibration tester of the pump A, the pump B and the pump C are respectively connected to the signal input end of the PLC through switches; the signal output end of the PLC is connected to the signal input ends of a first relay KM1, a second relay KM2 and a third relay KM 3; and the signal output end of the PLC is connected with two audible and visual alarms which are respectively used for prompting the temperature exceeding standard and the vibration exceeding standard.

A centrifugal pump automatic switching control equipment based on PLC include manual and automatic two kinds of modes, write into manual debugging procedure, automatic control procedure, regularly cut pump procedure, vibration data comparison procedure and temperature data comparison procedure in the PLC controller, these procedures all are current procedures, are known for technical staff in the field.

The manual control mode is used for overhauing and troubleshooting or use when debugging equipment to A pump, B pump and C pump, promptly when debugging A pump, the hand control mode is transferred to automatic switching device's change over switch, and the switch closure between the signal output part and the PLC controller with the infrared temperature tester of A pump and vibration tester again starts the A pump, detects A pump body thrust bearing's temperature data and vibration data through the PLC controller, if unusual, audible-visual annunciator can send out the police dispatch newspaper, makes things convenient for the staff to troubleshoot the trouble, B, C pump debugging theory of operation as above. When the pump A is debugged, the switch between the signal output ends of the infrared temperature tester and the vibration tester of the pump A and the PLC is only closed so as to prevent the pump B and the pump C from mistakenly transmitting data due to the influence of the external environment and influencing the accuracy of the data during the debugging of the pump A.

When a change-over switch of the automatic switching device is switched to the automatic control mode, switches between signal output ends of an infrared temperature tester and a vibration tester of the pump A, the pump B and the pump C and a PLC (programmable logic controller) are all closed, the PLC sends a control signal to a first relay KM1 of the pump A, a first relay coil is electrified, a normally open contact of a first relay KM1 is closed, the pump A starts to work, meanwhile, the infrared temperature tester and the vibration tester of a thrust bearing of a pump body of the pump A start to work, the PLC starts to time, a timer of the PLC sets the time to be 4h, when the time of the timer reaches 4h, the PLC sends a pump switching signal to the first relay KM2 and a second relay KM2, the first relay coil is electrified, the second relay KM2 coil is electrified, and therefore, the pump A stops working, the pump B starts to work; if the vibration data transmitted by the vibration tester of the pump A is larger than 0.05mm within the time set by the timer for 4h or the temperature transmitted by the infrared temperature tester exceeds 80 ℃, the PLC controls the corresponding audible and visual alarm to give an alarm, the output end of the PLC sends a pump switching instruction, the pump A stops working, the pump B starts working, and the audible and visual alarm gives out sound for 3-5s and then stops working; in the same way, the working principle of the pump B and the pump C is as above. The infrared temperature tester and the vibration tester are temperature sensors and vibration sensors, and the type of the specific sensor can be selected according to requirements.

Preferably, the signal output end of the PLC controller is connected with an A pump operation indicator lamp, a B pump operation indicator lamp and a C pump operation indicator lamp. When the pump A works, the PLC controller controls the operation indicating lamp of the pump A to be turned on, and the pump B and the pump C are the same in principle, so that working conditions of the pump A, the pump B and the pump C can be observed more visually by workers.

Preferably, the pump operation indicator lamp A, the pump operation indicator lamp B and the pump operation indicator lamp C are different in color. This is to ensure that the operator can distinguish the a, B and C pumps by the color of the indicator lights.

The utility model has the advantages that: simple structure, convenient operation, the cost is lower, through centrifugal pump automatic switching control equipment based on PLC can carry out manual debugging to each centrifugal pump, can carry out automatic switch-over to different centrifugal pumps according to operating time, temperature or vibration data again, it is longer to have avoided single centrifugal pump operating time, thereby effectively avoided the damage of centrifugal pump thrust bearing, including a motor, an end cap, a controller, and a cover plate, can in time detect the work anomaly of centrifugal pump, and then realize in time maintaining the centrifugal pump, saved the expense of changing the centrifugal pump, and the production cost is reduced, guaranteed that production goes on smoothly, higher comprehensive economic benefits has been brought.

Drawings

Fig. 1 is a schematic view of a connection structure between the centrifugal pump and the relay of the present invention.

Fig. 2 is the wiring schematic diagram of the PLC controller of the present invention.

In the figure: KM 1-first relay; KM 2-second relay; KM 3-third relay.

Detailed Description

With reference to fig. 1 and 2, the automatic switching device of the centrifugal pump based on PLC according to the present invention will be described in detail.

A centrifugal pump automatic switching device based on PLC comprises a first relay KM1, a second relay KM2, a third relay KM3 and a PLC controller, wherein a manual debugging program, an automatic control program, a timing pump switching program, a vibration data comparison program and a temperature data comparison program are arranged in the PLC controller, normally open contacts of the first relay KM1, the second relay KM2 and the third relay KM3 are respectively connected among a pump A, a pump B and a pump C and a power supply, and an infrared temperature tester and a vibration tester are installed at thrust bearings of pump bodies of the pump A, the pump B and the pump C; the signal input end of the PLC is connected with a change-over switch of a manual control mode and an automatic control mode; the signal output ends of the infrared temperature tester and the vibration tester of the pump A, the pump B and the pump C are respectively connected to the signal input end of the PLC through switches; the signal output end of the PLC is connected to the signal input ends of a first relay KM1, a second relay KM2 and a third relay KM 3; and the signal output end of the PLC is connected with two audible and visual alarms which are respectively used for prompting the temperature exceeding standard and the vibration exceeding standard.

Further, as a centrifugal pump automatic switching control equipment's a concrete implementation mode based on PLC, the signal output part of PLC controller is connected with A pump operation pilot lamp, B pump operation pilot lamp, C pump operation pilot lamp. When the pump A works, the PLC controller controls the operation indicating lamp of the pump A to be turned on, and the pump B and the pump C are the same in principle, so that working conditions of the pump A, the pump B and the pump C can be observed more visually by workers.

Further, as a specific implementation of centrifugal pump automatic switching control equipment based on PLC, a pump operation pilot lamp, B pump operation pilot lamp, C pump operation pilot lamp are different colours respectively. This is to ensure that the operator can distinguish the a, B and C pumps by the color of the indicator lights. The specific color is set by itself, and can be classified into red light, yellow light or green light, for example.

Further, as a specific implementation of centrifugal pump automatic switching control equipment based on PLC's a specific implementation, between A pump and first relay KM1, between B pump and the second relay KM2 and between C pump and the third relay KM3 all be connected with the fuse. This is to protect the a, B and C pumps.

In the specific implementation: the manual control mode is used for overhauing and troubleshooting or use when debugging equipment to A pump, B pump and C pump, promptly when debugging A pump, the hand control mode is transferred to automatic switching device's change over switch, and the switch is closed between the signal output part and the PLC controller with the infrared temperature tester of A pump and vibration tester again, starts the A pump, is lighted by PLC controller control A pump operation pilot lamp, detects A pump body thrust bearing's temperature data and vibration data through the PLC controller, if unusual, audible-visual annunciator can send the police dispatch newspaper, makes things convenient for the staff to investigate the trouble, B, C pump debugging theory of operation is as above. When the pump A is debugged, the switch between the signal output ends of the infrared temperature tester and the vibration tester of the pump A and the PLC is only closed so as to prevent the pump B and the pump C from mistakenly transmitting data due to the influence of the external environment and influencing the accuracy of the data during the debugging of the pump A.

When a change-over switch of the automatic switching device is switched to the automatic control mode, switches between signal output ends of an infrared temperature tester and a vibration tester of the pump A, the pump B and the pump C and a PLC (programmable logic controller) are all closed, the PLC sends control signals to a first relay KM1 of the pump A, a first relay coil is electrified, a normally open contact of a first relay KM1 is closed, the pump A starts to work, an A pump operation indicator lamp is controlled by the PLC to be lightened, meanwhile, the infrared temperature tester and the vibration tester of a thrust bearing of the pump body of the pump A start to work, the PLC starts to time, the time set by a timer of the PLC is 4h, when the time of the timer reaches 4h, the PLC sends pump switching-off signals to the first relay KM2 and a second relay KM2, the first relay coil is not electrified, the coil of the second relay KM2 is electrified, so that the pump A stops working, and the pump B starts working; if the vibration data transmitted by the vibration tester of the pump A is larger than 0.05mm within the time set by the timer for 4h or the temperature transmitted by the infrared temperature tester exceeds 80 ℃, the PLC controls the corresponding audible and visual alarm to give an alarm, the output end of the PLC sends a pump switching instruction, the pump A stops working, the pump B starts working, and the audible and visual alarm gives out sound for 3-5s and then stops working; in the same way, the working principle of the pump B and the pump C is as above. The infrared temperature tester and the vibration tester are temperature sensors and vibration sensors, and the type of the specific sensor can be selected according to requirements.

While the invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. The automatic switching device of the centrifugal pump based on the PLC is characterized by comprising a first relay KM1, a second relay KM2, a third relay KM3 and a PLC controller, wherein a manual debugging program, an automatic control program, a timing pump switching program, a vibration data comparison program and a temperature data comparison program are arranged in the PLC controller, normally open contacts of the first relay KM1, the second relay KM2 and the third relay KM3 are respectively connected between a pump A, a pump B and a pump C and a power supply, and an infrared temperature tester and a vibration tester are installed at thrust bearings of pump bodies of the pump A, the pump B and the pump C; the signal input end of the PLC is connected with a change-over switch of a manual control mode and an automatic control mode; the signal output ends of the infrared temperature tester and the vibration tester of the pump A, the pump B and the pump C are respectively connected to the signal input end of the PLC through switches; the signal output end of the PLC is connected to the signal input ends of a first relay KM1, a second relay KM2 and a third relay KM 3; and the signal output end of the PLC is connected with two audible and visual alarms which are respectively used for prompting the temperature exceeding standard and the vibration exceeding standard.

2. The automatic switching device of the centrifugal pump based on the PLC of claim 1, wherein a signal output end of the PLC controller is connected with an A pump running indicator lamp, a B pump running indicator lamp and a C pump running indicator lamp.

3. The PLC-based automatic switching device for the centrifugal pumps as claimed in claim 2, wherein the operation indicator lamp of the pump A, the operation indicator lamp of the pump B and the operation indicator lamp of the pump C are respectively different colors.

4. The automatic switching device of a PLC-based centrifugal pump according to claim 1, 2 or 3, wherein fuses are connected between the A pump and the first relay KM1, between the B pump and the second relay KM2 and between the C pump and the third relay KM 3.

Images