CN203457128U

CN203457128U - Water pump electronic pressure switch

Info

Publication number: CN203457128U
Application number: CN201320580157.7U
Authority: CN
Inventors: 赵华勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-21
Filing date: 2013-09-21
Publication date: 2014-02-26
Anticipated expiration: 2023-09-21

Abstract

The utility model relates to a water pump electronic pressure switch, comprising a lower underframe, a pressure capsule, a pin roll, a spring, a middle underframe, a microswitch fixed plate, an upper underframe and a control circuit; the control circuit comprises a capacitance-resistance depressurization type DC power source, a water pump starting circuit and a frequent starting prevention circuit. The water pump electronic pressure switch can effectively avoid frequent starting of a self-priming pump and substantially raise the service life of the self-priming pump.

Description

A kind of water pump electronic pressure switch

Technical field

The utility model relates to a kind of pressure switch for water pump, especially a kind of electronic pressure switch.

Background technology

In family supplies water, often adopts on self priming pump, to fill pressure switch and achieve automation, when tap is opened, the energising of pressure switch action water pump, when tap is closed, hydraulic pressure increase in pressure switch place makes again pressure switch move water pump to close.It is automatically to realize by the pressure of water that pressure switch is controlled power on/off, but it is all little that existing pressure switch is controlled the pressure differential of power on/off, generally in 0.05Mpa, its poor journey, the pump on-position and the de-energized distance that are pressure switch are also little, cause when pump de-energized, due to reasons such as water leakages, pressure switch will be back to on-position from de-energized at short notice starts water pump voluntarily, then make again pressure switch action water pump close, cause like this pressure switch can move frequently when tap is closed.This work frequently has a strong impact on the life-span of pressure switch and pump.

Summary of the invention

The purpose of this utility model is to provide a kind of electronic pressure switch of anti-self priming pump frequent starting.

The utility model is achieved in that this pressure switch comprises lower underframe, pressure bladder, bearing pin, spring, middle underframe, sensitive switch fixed head, upper underframe and a control circuit, described lower underframe and middle underframe are connected, and have a screw thread port on it, on described middle underframe, there is a port, described pressure bladder is placed between lower underframe and middle underframe, and by lower underframe and middle underframe compression fit, its lower surface communicates with the screw thread port of lower underframe, and upper surface communicates with the port of middle underframe, described bearing pin is placed in the port of middle underframe, and bearing pin and middle underframe form a moving sets, and is placed in the upper surface of pressure bladder, described spring is placed in the port of middle underframe, and spring one end heads on bearing pin, and the other end heads on middle underframe, described upper underframe and middle underframe are connected, and have a hole on it, described sensitive switch fixed head is placed in the hole of underframe, and is connected with upper underframe, has one often to drive sensitive switch on it, is arranged on sensitive switch fixed head lower surface, and faces bearing pin, described control circuit comprises the capacitance-resistance step down type DC power supply that capacitor C 1, capacitor C 2, resistance R 1, rectifier D1, voltage-stabiliser tube D2 form, capacitor C 3, capacitor C 4, resistance R 2, resistance R 3, resistance R 4, triode Q1, often open the starting mode of pump circuit that sensitive switch, a NE555P timer, MOC optical coupled switch, bidirectional triode thyristor form, also comprise the anti-frequent starting circuit that capacitor C 5, capacitor C 6, resistance R 5, resistance R 6, resistance R 7, triode Q2, the 2nd NE555P timer, CD4017 counter and not gate form, resistance R 1 in capacitance-resistance step down type DC power supply exchanges incoming end with one of capacitor C 1 parallel connection and one end access rectifier D1, the other end accesses extraneous power supply, another of rectifier D1 exchanges incoming end and also accesses extraneous power supply, voltage-stabiliser tube D2 is in parallel with capacitor C 2, the positive pole of voltage-stabiliser tube D2 connects the anodal DC output end of rectifier D1, and the negative pole of voltage-stabiliser tube D2 connects the negative pole DC output end of rectifier D1, capacitor C 3 in starting mode of pump circuit is connected with resistance R 2 and is accessed capacitance-resistance step down type DC power supply, wherein capacitor C 3 terminations enter the positive pole of capacitance-resistance step down type DC power supply, resistance R 2 terminations enter the negative pole of capacitance-resistance step down type DC power supply, the contact that capacitor C 3 is often driven to sensitive switch with the branch access of connecting of resistance R 2, the triggering pin 2 of the emitter of triode Q1 and a NE555P timer, threshold values pin 6, often open another contact of sensitive switch, the reset pin 4 of the collector electrode of triode Q1 and a NE555P timer, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the one NE555P timer, the control pin 5 of the one NE555P timer is through the negative pole of capacitor C 4 access capacitance-resistance step down type DC power supply, the anode pin 1 of the output pin 3 access MOC optocouplers of the one NE555P timer, the negative electrode pin 2 of MOC optocoupler is through the negative pole of resistance R 3 access capacitance-resistance step down type DC power supply, one output pin 4 of MOC optocoupler is through the T1 utmost point of resistance R 4 access bidirectional triode thyristors, the control utmost point G of another output pin 6 access bidirectional triode thyristors of MOC optocoupler, the positive pole of 16 pin access capacitance-resistance step down type DC power supply in the CD4017 counter in anti-frequent starting circuit, the negative pole of 8 pin access capacitance-resistance step down type DC power supply in CD4017 counter, the output pin 3 of input end of clock 14 pin access the one NE555P timers, the output pin 3 of zero clearing input 15 pin access the 2nd NE555P timers, the base stage of output access triode Q1, output also accesses the base stage of triode Q2 through not gate, capacitor C 5, resistance R 5 are connected with resistance R 6 and are accessed capacitance-resistance step down type DC power supply, and wherein resistance R 5 terminations enter the positive pole of capacitance-resistance step down type DC power supply, and capacitor C 5 terminations enter the negative pole of capacitance-resistance step down type DC power supply, the discharge end 7 of branch through resistance R 7 access the 2nd NE555P timers of connecting by resistance R 5 with resistance R 6, the collector electrode access resistance R 5 of triode Q2 and the branch of connecting of resistance R 6, the discharge end 7 of emitter access the 2nd NE555P timer of triode Q2, triggering pin 2 by capacitor C 5 with branch access the 2nd NE555P timer of connecting of resistance R 6, threshold values pin 6, the reset pin 4 of the 2nd NE555P timer, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the 2nd NE555P timer, the control pin 5 of the 2nd NE555P timer is through the negative pole of capacitor C 6 access capacitance-resistance step down type DC power supply, zero clearing input 15 pin in the output pin 3 access CD4017 counters of the 2nd NE555P timer.

The utility model should be connected with self priming pump while installing, and it has following several working method.

The first: when tap is opened, pump housing internal pressure reduces, the screw thread passage port hydraulic pressure that is lower underframe in pressure switch reduces, spring can push away bearing pin and move down, to bearing pin with often open sensitive switch no conflict, in normally open, the capacitor C 3 in parallel with it is in charged state, the voltage that has just started capacitor C 3 two ends is zero, so that capacitor C 3 is high potential with the branch of connecting (being A point) of resistance R 2, the output pin 3 of first timer NE555P is electronegative potential, MOC optocoupler no power, its output pin is obstructed, bidirectional triode thyristor is controlled utmost point G no signal, not conducting of bidirectional triode thyristor, the power end no power of water pump, when capacitor C 3 is charged to a certain degree, the voltage at its two ends is elevated to a certain degree, making capacitor C 3 is electronegative potential with the branch of connecting (being A point) of resistance R 2, the output pin 3 of first timer NE555P is high potential, the energising of MOC optocoupler, its output pin communicates, and bidirectional triode thyristor is controlled utmost point G signal, bidirectional triode thyristor conducting, the power end energising of water pump.

The second: when tap is closed, pump housing internal pressure increases, the screw thread passage port hydraulic pressure that is lower underframe in pressure switch increases, pressure bladder can push away bearing pin and rise, to bearing pin with often drive sensitive switch and conflict, sensitive switch normally opened contact is closed, the capacitor C 3 in parallel with it is in discharge condition, the voltage at capacitor C 3 two ends is zero, so that capacitor C 3 is high potential with the branch of connecting (being A point) of resistance R 2, the output pin 3 of first timer NE555P is electronegative potential, MOC optocoupler no power, its output pin is obstructed, bidirectional triode thyristor is controlled utmost point G no signal, not conducting of bidirectional triode thyristor, the power end no power of water pump.

The third: when tap is closed, due to reasons such as water leakages, often drive sensitive switch and can follow the equally frequent break-make of usual pressure switch, if break-make too frequently makes capacitor C 3 also not be charged to certain voltage, be discharged again, the power end of water pump is no power always.

The 4th kind: when tap is closed, due to reasons such as water leakages, often drive sensitive switch and can follow the equally frequent break-make of usual pressure switch, if often drive sensitive switch, make capacitor C 3 charged opening time, water pump energising starts, and then often drives the closed water pump of sensitive switch and closes, then disconnect again and make water pump energising, cause water pump frequent starting, for making the number of starts too not frequent, be provided with anti-frequent starting circuit.Anti-frequent starting circuit is work like this, while just powering on, the voltage at capacitor C 5 two ends is zero, so that capacitor C 5 is electronegative potential with the branch of connecting of resistance R 6, the output pin 3 of second timer NE555P is high potential, discharge end 7 cut-offs of the 2nd NE555P timer, zero clearing input 15 pin in CD4017 counter are also high potential, CD4017 counter O reset no-output, when capacitor C 5 is charged to a certain degree, the voltage at its two ends is elevated to a certain degree, so that capacitor C 5 is high potential with the branch of connecting of resistance R 6, the output pin 3 of second timer NE555P is electronegative potential, discharge end 7 conductings of the 2nd NE555P timer, zero clearing input 15 pin in CD4017 counter are also electronegative potential, CD4017 counter is normally counted, discharge end 7 conductings of the 2nd NE555P timer make capacitor C 5 through R6, R7 or triode Q2 electric discharge, the output that the selection of R7 or triode Q2 accesses the base stage of triode Q1 in CD4017 counter determines through not gate 17, during output low level, the base stage of triode Q2 is high level, triode Q2 conducting, capacitor C 5 is through R6, triode Q2 electric discharge, during output high level, the base stage of triode Q2 is low level, triode Q2 cut-off, capacitor C 5 is through R6, R7 electric discharge, discharge time can be than through R6, triode Q2 is long discharge time, the normal gate time of CD4017 counter is long, when capacitor C 5 discharges into a certain degree, capacitor C 5 is back to electronegative potential with the branch of connecting of resistance R 6, CD4017 counter O reset no-output, then circulation makes again it normally count.It is that the output pin 3 of first timer NE555P is high potential that starting mode of pump closes again, be electronegative potential again, input to pulse of input end of clock 14 pin of CD4017 counter 16, CD4017 counter 16 countings once, corresponding output is high potential, within the time period of the normal counting of CD4017 counter, the frequent power on/off of water pump several times after, when the output that accesses triode Q1 base stage in CD4017 counter 16 is high potential, triode Q1 conducting, capacitor C 3 electric discharges, make the power end no power of water pump, the output of triode Q2 base stage is electronegative potential, capacitor C 5 is through R6, R7 electric discharge, time is long, in this process, the power end of water pump is no power always, can prevent water pump frequent starting, after capacitor C 5 has been discharged, CD4017 counter O reset no-output, capacitor C 3 rechargeables, the conducting again of the power end of water pump, within the time period of the normal counting of CD4017 counter, the output that accesses triode Q1 base stage in the frequent power on/off number of times of water pump does not make CD4017 counter 16 is high potential, and CD4017 counter is by zero clearing again, and then work.

The invention has the beneficial effects as follows: can effectively anti-self priming pump frequent starting, the life-span of greatly improving self priming pump.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is further illustrated.

Fig. 1 is the overall structure schematic diagram of the utility model electronic pressure switch.

Fig. 2 is the control circuit winding diagram of the utility model electronic pressure switch.

Embodiment

Fig. 1 is the overall structure schematic diagram of the utility model electron pressure switch.By figure, known, this pressure switch comprises lower underframe 1, pressure bladder 2, bearing pin 3, spring 4, middle underframe 5, sensitive switch fixed head 6, upper underframe 8 and a control circuit; Described lower underframe 1 is connected with middle underframe 5, has a screw thread port 11 on it; On described middle underframe 5, there is a port 10; Described pressure bladder 2 is placed between lower underframe 1 and middle underframe 5, and by lower underframe 1 and middle underframe 5 compression fit, its lower surface communicates with the screw thread port 11 of lower underframe 1, and upper surface communicates with the port 10 of middle underframe 5; Described bearing pin 3 is placed in the port 10 of middle underframe 5, and bearing pin 3 forms a moving sets with middle underframe 5, and is placed in the upper surface of pressure bladder 2; Described spring 4 is placed in the port 10 of middle underframe 5, and spring 4 one end head on bearing pin 3, and the other end heads on middle underframe 5; Described upper underframe 8 is connected with middle underframe 5, has a hole 9 on it; Described sensitive switch fixed head 6 is placed in the hole 9 of underframe 8, and is connected with upper underframe 8, has one often to drive sensitive switch 7 on it, is arranged on sensitive switch fixed head 6 lower surfaces, and faces bearing pin 3.

Fig. 2 is the control circuit winding diagram of the utility model electron pressure switch.By figure, known, described control circuit comprises the capacitance-resistance step down type DC power supply that capacitor C 1, capacitor C 2, resistance R 1, rectifier D1, voltage-stabiliser tube D2 form, capacitor C 3, capacitor C 4, resistance R 2, resistance R 3, resistance R 4, triode Q1, often open the starting mode of pump circuit that sensitive switch 7, a NE555P timer 12, MOC optical coupled switch 14, bidirectional triode thyristor 15 form, also comprise the anti-frequent starting circuit that capacitor C 5, capacitor C 6, resistance R 5, resistance R 6, resistance R 7, triode Q2, the 2nd NE555P timer 13, CD4017 counter 16 and not gate 17 form, resistance R 1 in capacitance-resistance step down type DC power supply exchanges incoming end with one of capacitor C 1 parallel connection and one end access rectifier D1, the other end accesses extraneous power supply, another of rectifier D1 exchanges incoming end and also accesses extraneous power supply, voltage-stabiliser tube D2 is in parallel with capacitor C 2, the positive pole of voltage-stabiliser tube D2 connects the anodal DC output end of rectifier D1, and the negative pole of voltage-stabiliser tube D2 connects the negative pole DC output end of rectifier D1, capacitor C 3 in starting mode of pump circuit is connected with resistance R 2 and is accessed capacitance-resistance step down type DC power supply, wherein capacitor C 3 terminations enter the positive pole of capacitance-resistance step down type DC power supply, resistance R 2 terminations enter the negative pole of capacitance-resistance step down type DC power supply, the contact that capacitor C 3 is often driven to sensitive switch 7 with the branch of connecting (the being A point) access of resistance R 2, the triggering pin 2 of the emitter of triode Q1 and a NE555P timer 12, threshold values pin 6, often open another contact of sensitive switch 7, the reset pin 4 of the collector electrode of triode Q1 and a NE555P timer 12, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the one NE555P timer 12, the control pin 5 of the one NE555P timer 12 is through the negative pole of capacitor C 4 access capacitance-resistance step down type DC power supply, the anode pin 1 of the output pin 3 access MOC optocouplers 14 of the one NE555P timer 12, the negative electrode pin 2 of MOC optocoupler 14 is through the negative pole of resistance R 3 access capacitance-resistance step down type DC power supply, one output pin 4 of MOC optocoupler 14 is through the T1 utmost point of resistance R 4 access bidirectional triode thyristors 15, the control utmost point G of another output pin 6 access bidirectional triode thyristors 15 of MOC optocoupler 14, the positive pole of 16 pin access capacitance-resistance step down type DC power supply in the CD4017 counter 16 in anti-frequent starting circuit, the negative pole of 8 pin access capacitance-resistance step down type DC power supply in CD4017 counter 16, the output pin 3 of input end of clock 14 pin access the one NE555P timers 12, the output pin 3 of zero clearing input 15 pin access the 2nd NE555P timers 13, (the 7th output 6 pin of take in figure are example to output, can also be other outputs) base stage of access triode Q1, output is also through the base stage of not gate 17 access triode Q2, capacitor C 5, resistance R 5 are connected with resistance R 6 and are accessed capacitance-resistance step down type DC power supply, and wherein resistance R 5 terminations enter the positive pole of capacitance-resistance step down type DC power supply, and capacitor C 5 terminations enter the negative pole of capacitance-resistance step down type DC power supply, resistance R 5 is accessed to the discharge end 7 of the 2nd NE555P timers 13 with the branch of connecting (being B point) of resistance R 6 through resistance R 7, the collector electrode access resistance R 5 of triode Q2 and the branch of connecting of resistance R 6, the discharge end 7 of emitter access the 2nd NE555P timer 13 of triode Q2, triggering pin 2 by capacitor C 5 with branch access the 2nd NE555P timer 13 of connecting of resistance R 6, threshold values pin 6, the reset pin 4 of the 2nd NE555P timer 13, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the 2nd NE555P timer 13, the control pin 5 of the 2nd NE555P timer 13 is through the negative pole of capacitor C 6 access capacitance-resistance step down type DC power supply, zero clearing input 15 pin in the output pin 3 access CD4017 counters 16 of the 2nd NE555P timer 13.

In addition to the implementation, the present invention also has other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation one-tenth, all drop in the protection range of requirement of the present invention.

Claims

1. a water pump electronic pressure switch, is characterized in that: this pressure switch comprises lower underframe, pressure bladder, bearing pin, spring, middle underframe, sensitive switch fixed head, upper underframe and a control circuit, described lower underframe and middle underframe are connected, and have a screw thread port on it, on described middle underframe, there is a port, described pressure bladder is placed between lower underframe and middle underframe, and by lower underframe and middle underframe compression fit, its lower surface communicates with the screw thread port of lower underframe, and upper surface communicates with the port of middle underframe, described bearing pin is placed in the port of middle underframe, and bearing pin and middle underframe form a moving sets, and is placed in the upper surface of pressure bladder, described spring is placed in the port of middle underframe, and spring one end heads on bearing pin, and the other end heads on middle underframe, described upper underframe and middle underframe are connected, and have a hole on it, described sensitive switch fixed head is placed in the hole of underframe, and is connected with upper underframe, has one often to drive sensitive switch on it, is arranged on sensitive switch fixed head lower surface, and faces bearing pin, described control circuit comprises the capacitance-resistance step down type DC power supply that capacitor C 1, capacitor C 2, resistance R 1, rectifier D1, voltage-stabiliser tube D2 form, capacitor C 3, capacitor C 4, resistance R 2, resistance R 3, resistance R 4, triode Q1, often open the starting mode of pump circuit that sensitive switch, a NE555P timer, MOC optical coupled switch, bidirectional triode thyristor form, also comprise the anti-frequent starting circuit that capacitor C 5, capacitor C 6, resistance R 5, resistance R 6, resistance R 7, triode Q2, the 2nd NE555P timer, CD4017 counter and not gate form, resistance R 1 in capacitance-resistance step down type DC power supply exchanges incoming end with one of capacitor C 1 parallel connection and one end access rectifier D1, the other end accesses extraneous power supply, another of rectifier D1 exchanges incoming end and also accesses extraneous power supply, voltage-stabiliser tube D2 is in parallel with capacitor C 2, the positive pole of voltage-stabiliser tube D2 connects the anodal DC output end of rectifier D1, and the negative pole of voltage-stabiliser tube D2 connects the negative pole DC output end of rectifier D1, capacitor C 3 in starting mode of pump circuit is connected with resistance R 2 and is accessed capacitance-resistance step down type DC power supply, wherein capacitor C 3 terminations enter the positive pole of capacitance-resistance step down type DC power supply, resistance R 2 terminations enter the negative pole of capacitance-resistance step down type DC power supply, the contact that capacitor C 3 is often driven to sensitive switch with the branch access of connecting of resistance R 2, the triggering pin 2 of the emitter of triode Q1 and a NE555P timer, threshold values pin 6, often open another contact of sensitive switch, the reset pin 4 of the collector electrode of triode Q1 and a NE555P timer, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the one NE555P timer, the control pin 5 of the one NE555P timer is through the negative pole of capacitor C 4 access capacitance-resistance step down type DC power supply, the anode pin 1 of the output pin 3 access MOC optocouplers of the one NE555P timer, the negative electrode pin 2 of MOC optocoupler is through the negative pole of resistance R 3 access capacitance-resistance step down type DC power supply, one output pin 4 of MOC optocoupler is through the T1 utmost point of resistance R 4 access bidirectional triode thyristors, the control utmost point G of another output pin 6 access bidirectional triode thyristors of MOC optocoupler, the positive pole of 16 pin access capacitance-resistance step down type DC power supply in the CD4017 counter in anti-frequent starting circuit, the negative pole of 8 pin access capacitance-resistance step down type DC power supply in CD4017 counter, the output pin 3 of input end of clock 14 pin access the one NE555P timers, the output pin 3 of zero clearing input 15 pin access the 2nd NE555P timers, the base stage of output access triode Q1, output also accesses the base stage of triode Q2 through not gate, capacitor C 5, resistance R 5 are connected with resistance R 6 and are accessed capacitance-resistance step down type DC power supply, and wherein resistance R 5 terminations enter the positive pole of capacitance-resistance step down type DC power supply, and capacitor C 5 terminations enter the negative pole of capacitance-resistance step down type DC power supply, the discharge end 7 of branch through resistance R 7 access the 2nd NE555P timers of connecting by resistance R 5 with resistance R 6, the collector electrode access resistance R 5 of triode Q2 and the branch of connecting of resistance R 6, the discharge end 7 of emitter access the 2nd NE555P timer of triode Q2, triggering pin 2 by capacitor C 5 with branch access the 2nd NE555P timer of connecting of resistance R 6, threshold values pin 6, the reset pin 4 of the 2nd NE555P timer, power pins 8 all accesses the positive pole of capacitance-resistance step down type DC power supply, the negative pole of the grounding pin 1 access capacitance-resistance step down type DC power supply of the 2nd NE555P timer, the control pin 5 of the 2nd NE555P timer is through the negative pole of capacitor C 6 access capacitance-resistance step down type DC power supply, zero clearing input 15 pin in the output pin 3 access CD4017 counters of the 2nd NE555P timer.