CN200949519Y

CN200949519Y - Water cutting-off protector

Info

Publication number: CN200949519Y
Application number: CN 200620075883
Authority: CN
Inventors: 贾柏青
Original assignee: ZHEJIANG ZHONGMEI ELECTRON CO Ltd
Current assignee: ZHEJIANG ZHONGMEI ELECTRON CO Ltd
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2007-09-19
Anticipated expiration: 2016-09-01

Abstract

The utility model relates to a protection device for mine equipment operation, concretely is a water interruption protector for mine pump system. The control circuit of the water interruption protector comprises a RC oscillation circuit which can produce ac detection signal, the RC oscillation circuit and the signal output end access a probe signal detection circuit with a water measuring control joint of pipe, the signal output end of the probe signal detection circuit access a control signal and action output circuit, in addition, a power supply circuit is connected with the power input ends of the RC oscillation circuit, the probe signal detection circuit and the control signal and action output circuit. The utility model can monitor the real-time situation of the water flow in the pump pipe, meanwhile the protection device can be received the protection signal and action in time when water interruption accurs, which can ensure the safety reliability of the mine pump operation.

Description

No water protector

Technical field

The utility model relates to a kind of protective gear of pit gear operation, specifically is a kind of no water protector that is used for the mine water pumping system.

Background technique

The various water pumps that use in mine, gas exhaust pump may make water pump produce to cut off the water supply when water intake or pipeline break down in running, this moment as untimelyly shut down, protection action such as warning, may cause the accident.Still do not have at present more satisfactory device and can realize the timely discovery and the protection of cutting off the water supply.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of mine water pump of can in time finding and cuts off the water supply, no water protector that simultaneously can the output protection signal.

The control circuit of the utility model no water protector comprises a RC vibrator circuit that can produce alternating-current detection signal; RC vibrator circuit and signal output part insert one and have the probe signal testing circuit that water pipe is surveyed the water control head; the signal output part of probe signal testing circuit inserts a control signal and action output circuit through a delay circuit, also has a power circuit to be connected with the power input of RC vibrator circuit, probe signal testing circuit and control signal and action output circuit in addition.Described water pipe is surveyed water prode and is made of pair of electrodes.

The utility model can carry out real-time supervision to having or not of current in the water pump pipeline, in time to protective gear output protection signal and action, thereby has guaranteed the safety reliability of mine water pump operation in the time of can cutting off the water supply simultaneously.

Description of drawings

Fig. 1 is the theory diagram of the utility model embodiment's control circuit;

Fig. 2 is the circuit diagram of the utility model embodiment's RC vibrator circuit;

Fig. 3 is the circuit diagram of embodiment's of the present utility model probe signal testing circuit;

Fig. 4 is the circuit diagram of the utility model embodiment's delay circuit;

Fig. 5 is the utility model embodiment's the control signal and the circuit diagram of action output circuit;

Fig. 6 is the circuit diagram of the utility model embodiment's power circuit.

Embodiment

As shown in Figure 1, among the utility model embodiment, the RC vibrator circuit produces the sine wave freuqency signal of 50KHz, offers water prode as alternating-current detection signal, uses alternating signal can prevent the generation of probe electrode ionization phenomena; Water pipe survey water prode is made up of two electrodes, and the electrode of joint detection signal insulate with tube wall at ordinary times; The another one electrode links to each other with tube wall, and with circuit in link to each other, make bolt shape.When in the water pipe when anhydrous, resistance is very big between testing electrode and the ground, approximate insulation, and testing signal can all be delivered to level sensitive circuit; When in the water pipe water being arranged, the resistance of water is less relatively, can drag down the signal level that is sent to testing circuit.Probe signal testing circuit detect probe state, the height by comparative level has judged whether water, output high level when anhydrous, low level when water is arranged is exported to control section with high-low level signal after the conversion; Before exporting to control section, delay circuit carries out of short duration time-delay, prevents to cause misoperation because of circuit is too sensitive; Control signal and action output are used for closing power machine and indicate state of alarm according to the high-low level control relay and the tutorial light action of testing circuit output.

RC vibrator circuit part is as shown in Figure 2: power supply VCC is after resistance R 5, R6 dividing potential drop, pass through resistance R 1, R2 again, the RC series and parallel sine wave oscillation circuit that capacitor C 1, C2 together constitute, frequency is 50KHz, the in-phase proportion that constitutes via operational amplifier U1A (LM358) and resistance R 3, R4 amplifies, frequency signal every directly, offers the frequency signal that water prode exchanges, as testing signal through capacitor C 3.

Probe signal testing circuit part is as shown in Figure 3: C4, R15, D1, R8, C6, R17, VR1, U1B forms the probe signal testing circuit, by the voltage comparator circuit of U1B (LM358) and VR1 formation, VR1 is for surveying the water prode part, enter voltage comparator circuit after the dividing potential drop, the height by comparative level has judged whether water, output high level when anhydrous, output low level when water is arranged is exported to subsequent conditioning circuit with high-low level signal after the conversion.

The delay circuit partial circuit is as shown in Figure 4: D2, and R9, C7 forms delay circuit, plays time-lag action when the testing circuit output level changes, and prevents that circuit is too sensitive, causes misoperation.

Control signal and the action output circuit part as shown in Figure 5: U2 (LM358) unit be control signal and the action output function, when in the water pipe when anhydrous, probe signal testing circuit output high level signal, the voltage comparator circuit of forming via operational amplifier U2A, U2B (LM358) and resistance R 10, R11, the output high level, U2B unit output high level control triode drives the actuating of relay, the outage of control pump motor power switch, U2A unit output high level driven for emitting lights diode is lighted, and warning message is provided.

The power supply unit circuit is as shown in Figure 6: power supply bridge path rectification part, and alternating signal is the output DC source after the diode bridge full wave rectifier, and use on the power supply road.Another part is a power supply indicator, is used to refer to power supply status.

Claims

1, a kind of no water protector; it is characterized in that: its control circuit comprises a RC vibrator circuit that can produce alternating-current detection signal; RC vibrator circuit and signal output part insert one and have the probe signal testing circuit that water pipe is surveyed the water control head; the signal output part of probe signal testing circuit inserts a control signal and action output circuit, also has a power circuit to be connected with the power input of RC vibrator circuit, probe signal testing circuit and control signal and action output circuit in addition.

2, no water protector according to claim 1 is characterized in that: the probe signal testing circuit is through a delay circuit incoming control signal and action output circuit.

3, no water protector according to claim 1 and 2 is characterized in that: described water pipe is surveyed water prode and is made of pair of electrodes.