An automatic ice-breaking control circuit

Abstract

The utility model discloses an automatic ice breaking control circuit, main control branch and a plurality of temperature control branch, through the temperature value that temperature sensor gathered, utilize the PID temperature controller in temperature control branch and control, according to the time control water pump motor in main control branch of time relay setting, by this realized the intelligent circulation control of water pump start -stop, realized according to the different start -up operation and stop time of ice breaking pump according to the setting different environmental temperature and circulates running, solved the problem of high energy consumption in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy equipment protection technology, and in particular to an automatic ice-breaking control circuit. Background Technology

[0002] Existing hydraulic structures, such as dams and sluice gates, are prone to icing in winter. Once icing occurs, it can cause frost heave on the dam surface and affect the normal operation of the sluice gates. In severe cases, it may damage the structure of the hydraulic structure. Existing solutions to prevent icing in front of hydraulic structures mainly include manual ice breaking, ice breaking by motorboats, compressed air blowing, electric heating, and water pump disturbance ice breaking.

[0003] Currently, the commonly used ice-breaking method in pumping stations is pump disturbance, which only requires one water pump and is low in cost. However, it only affects a small water area and its range is limited to the outlet end. Pumping stations need to provide joint protection for multiple points, such as the inlet gate, outlet gate, drainage gate, forebay flood control gate, forebay maintenance gate, and rear bay gate. This requires the use of high-power water pumps to work continuously. Since the temperature, freezing time, and ice thickness vary at different points, the conventional method of using submersible pumps for 24-hour disturbance for ice breaking protection results in a large waste of electricity and a high failure rate of submersible pumps. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide an automatic ice-breaking control circuit that uses a temperature sensor to collect ambient temperature in real time, and sets different start-up and stop times for the ice-breaking pump to run in a cycle when different ambient temperatures are set, thus solving the problem of excessive energy consumption in the prior art.

[0005] To achieve the above objectives, the present invention provides an automatic ice-breaking control circuit, comprising: a main control branch and multiple temperature control branches; The main control branch circuit includes a contactor, a circuit breaker, and a water pump motor connected in sequence; the contactor is connected to 380V three-phase power. The L line of the temperature control branch is any one of the three phases of the 380V three-phase power supply, and the N line is a shared N line with the 380V three-phase power supply. Each of the temperature control branches includes a PID temperature controller and an intermediate relay, wherein the first temperature control branch and the second temperature control branch also include a time relay; the output terminal of each of the temperature control branches is connected to one end of the circuit breaker coil, and the other end of the circuit breaker coil is connected to the neutral line; In the first temperature control branch, the output terminal of the first PID temperature controller is connected to the normally closed contact of the first intermediate relay and the first time relay. In the second temperature control branch, the output terminal of the second PID temperature controller is connected to the normally closed contact of the second intermediate relay and the second time relay. In the third temperature control branch, the output terminal of the third PID temperature controller is connected to the coil of the third intermediate relay; one end of the normally open contact of the third intermediate relay is connected to the L line, and the other end is connected to one end of the circuit breaker coil.

[0006] A further preferred embodiment includes an interlock circuit, wherein the output terminal of the second PID temperature controller is connected to one end of the coil of the first intermediate relay, and the other end of the coil of the first intermediate relay is connected to the neutral (N) line.

[0007] More preferably, the interlock circuit further includes the output terminal of the third PID temperature controller connected to one end of the second time relay coil, and the other end of the second time relay coil connected to the N line.

[0008] More preferably, the input ends of the first temperature control branch and the second temperature control branch are connected to control buttons, and the control buttons include automatic control contacts and manual control contacts connected in parallel.

[0009] Further preferred, the first, second, and third PID temperature controllers are all model XMT80.

[0010] In a further preferred embodiment, the main control branch is also provided with an indicator light, which is connected in series with the contact terminal of the circuit breaker.

[0011] In a further preferred embodiment, the main control branch is also equipped with a thermal relay, which is connected in series with an indicator light.

[0012] The automatic ice-breaking control circuit disclosed in this application has at least the following advantages compared to the prior art: This application has a simple structure and does not generate electromagnetic interference or other problems. Wiring and troubleshooting are clear at a glance, and it is easy to maintain. It uses a temperature sensor to collect the ambient temperature in real time. When different ambient temperatures are set, the ice-breaking pump will cycle according to different start-up and stop times, which solves the problem of excessive energy consumption in the prior art. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the automatic ice-breaking control circuit of this utility model.

[0014] Figure 2 This is a wiring diagram of the pins and relays of the first, second, and third PID temperature controllers in this utility model.

[0015] Figure 3 This is a pin diagram of the first, second, and third PID temperature controllers.

[0016] Figure 4 This is a schematic diagram of the overall temperature control branch in this utility model. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-4 As shown, one embodiment of this utility model provides an automatic ice-breaking control circuit, characterized in that it includes: a main control branch and multiple temperature control branches; The main control branch circuit includes a contactor QF, a circuit breaker KM4, and a water pump motor M connected in sequence; the contactor is connected to 380V three-phase power. The L line of the temperature control branch can be any one of the three phases of 380V, and the N line is shared with the 380V three-phase power supply. This application adopts three temperature ranges for temperature control according to daily maintenance needs. For example, the ice-breaking pump does not start above 0 degrees Celsius. When the temperature drops to 0 to -5°C, the ice-breaking pump starts for 30 minutes and then stops for 3 hours in a cycle. When the temperature drops to -5°C to -10°C, the ice-breaking pump starts for 1 hour and stops for 2 hours in a cycle. Below -10°C, the ice-breaking pump runs continuously for 24 hours.

[0019] like Figure 2 or Figure 3 Each of the temperature control branches includes a PID temperature controller and an intermediate relay, wherein the first temperature control branch and the second temperature control branch also include a time relay; the output terminal of each temperature control branch is connected to one end of the circuit breaker coil, and the other end of the circuit breaker coil is connected to the neutral line; therefore, in the temperature control branch of this application, the time relay can be set according to the above-mentioned time requirements.

[0020] In the first temperature control branch, the output terminal of the first PID temperature controller PID1 is connected to the normally closed contact of the first intermediate relay KA1 and the first time relay KT1. At this time, the temperature value collected by the temperature sensor meets the first set temperature range, that is, 0 to -5°C. The first time relay is set to work for 30 minutes and then stop for 3 hours. At this time, the first PID temperature controller outputs a high level, the first intermediate relay closes, and the contacts of the first time relay close after the coil of the first time relay is energized. At this time, the coil of the circuit breaker KM4 in the main control branch is energized and closes. The water pump motor M starts to work for 30 minutes and then stop for 3 hours, and works in a cycle.

[0021] In the second temperature control branch, the output of the second PID temperature controller PID2 is connected to the normally closed contact of the second intermediate relay KA2 and the second time relay KT2. More preferably, it also includes an interlock circuit, where the output of the second PID temperature controller is connected to one end of the coil of the first intermediate relay, and the other end of the coil of the first intermediate relay is connected to the neutral (N) line. At this time, when the temperature value collected by the temperature sensor conforms to the second set temperature range, i.e., -5℃ to -10℃, the second time relay is set to start for 1 hour and stop for 2 hours. At this time, the second PID temperature controller outputs a high level, the coil of the first intermediate relay is energized and disconnects, cutting off the first temperature control branch. Since the normally closed contact of the second intermediate relay KT2 is closed, the second time relay is energized and closes, the circuit breaker KM4 coil of the main control branch is energized and closes, and the water pump motor M begins to work in a cycle of starting for 1 hour and stopping for 2 hours.

[0022] In the third temperature control branch, the output terminal of the third PID temperature controller PID3 is connected to the coil of the third intermediate relay KA3; one end of the normally open contact of the third intermediate relay is connected to the L line, and the other end is connected to one end of the circuit breaker coil.

[0023] More preferably, the interlock circuit further includes the output terminal of the third PID temperature controller connected to one end of the second time relay coil, and the other end of the second time relay coil connected to the N line.

[0024] When the temperature value collected by the temperature sensor meets the third set temperature range, i.e. below -10 ℃, the third PID temperature controller outputs a high level. Due to the interlock circuit, the coils of the second and third intermediate relays are energized at this time. The second intermediate relay opens, cutting off the second temperature control branch. The third intermediate relay is a normally open relay, which closes after being energized. At this time, the coil of the circuit breaker KM4 is energized and closes, and the water pump motor M starts to run continuously for 24 hours.

[0025] The input terminals of the first temperature control branch and the second temperature control branch are connected to control buttons, which include parallel automatic control contacts and manual control contacts.

[0026] Preferably, the first, second, and third PID temperature controllers are all model XMT80. An indicator light is also provided in the main control branch, and the indicator light is connected in series with the contacts of the circuit breaker. A thermal relay is also provided in the main control branch, and the thermal relay is connected in series with the indicator light. In this application, the input terminals of the first, second, and third PID temperature controllers can be connected to signals collected by a single temperature sensor simultaneously, or each can be connected to a temperature sensor of the same model. Even if there is an error in the values ​​collected by the three temperature sensors, resulting in conditions that both the first and second PID temperature controllers are activated, the self-locking circuit will prevent the simultaneous activation of two time relays.

[0027] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An automatic ice-breaking control circuit, characterized in that, include: Main control branch circuit and multiple temperature control branch circuits; The main control branch circuit includes a contactor, a circuit breaker, and a water pump motor connected in sequence; the contactor is connected to 380V three-phase power. The L line of the temperature control branch is any one of the three phases of the 380V three-phase power supply, and the N line is a shared N line with the 380V three-phase power supply. Each of the temperature control branches includes a PID temperature controller and an intermediate relay, wherein the first temperature control branch and the second temperature control branch also include a time relay; the output terminal of each of the temperature control branches is connected to one end of the circuit breaker coil, and the other end of the circuit breaker coil is connected to the neutral line; In the first temperature control branch, the output terminal of the first PID temperature controller is connected to the normally closed contact of the first intermediate relay and the first time relay. In the second temperature control branch, the output terminal of the second PID temperature controller is connected to the normally closed contact of the second intermediate relay and the second time relay. In the third temperature control branch, the output terminal of the third PID temperature controller is connected to the coil of the third intermediate relay; one end of the normally open contact of the third intermediate relay is connected to the L line, and the other end is connected to one end of the circuit breaker coil.

2. The automatic ice-breaking control circuit according to claim 1, characterized in that, It also includes an interlock circuit, wherein the output terminal of the second PID temperature controller is connected to one end of the first intermediate relay coil, and the other end of the first intermediate relay coil is connected to the neutral line.

3. The automatic ice-breaking control circuit according to claim 2, characterized in that, The interlock circuit also includes a third PID temperature controller whose output is connected to one end of the second time relay coil, and the other end of the second time relay coil is connected to the neutral (N) line.

4. The automatic ice-breaking control circuit according to claim 1, characterized in that, The input terminals of the first temperature control branch and the second temperature control branch are connected to control buttons, which include parallel automatic control contacts and manual control contacts.

5. The automatic ice-breaking control circuit according to claim 1, characterized in that, The first, second, and third PID temperature controllers are all model XMT80.

6. The automatic ice-breaking control circuit according to claim 1, characterized in that, The main control branch is also equipped with an indicator light, which is connected in series with the contact terminal of the circuit breaker.

7. The automatic ice-breaking control circuit according to claim 1, characterized in that, The main control branch is also equipped with a thermal relay, which is connected in series with the indicator light.

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