CN107588013A - A kind of immersible pump with anti-jamming function - Google Patents
A kind of immersible pump with anti-jamming function Download PDFInfo
- Publication number
- CN107588013A CN107588013A CN201710529464.5A CN201710529464A CN107588013A CN 107588013 A CN107588013 A CN 107588013A CN 201710529464 A CN201710529464 A CN 201710529464A CN 107588013 A CN107588013 A CN 107588013A
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- control circuit
- electric capacity
- resistance
- immersible pump
- microswitch
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Abstract
The present invention relates to a kind of immersible pump with anti-jamming function.A kind of immersible pump with anti-jamming function includes current induction mechanism and control circuit；Described current induction mechanism is fixed on the delivery port of immersible pump, and function is the water outlet situation of sensing delivery port, outputs signal to control circuit；Described control circuit function divides two parts, first function is after rigid connection enters power supply, immersible pump normally starts work, and current induction mechanism closes immersible pump without water outlet signal to control circuit, control circuit within a certain period of time, as current induction mechanism has water outlet signal to control circuit within a certain period of time, immersible pump normal work, the second function are that current induction mechanism is suddenly without water outlet signal to control circuit in immersible pump course of normal operation, illustrate that impeller is stuck, control circuit closes immersible pump.Using the present invention, realize in the case of impeller is stuck, close pump automatically, prevent pump to be burned.
Description
Art
The present invention relates to a kind of water pump, specifically a kind of immersible pump with anti-jamming function.
Background technology
In existing technology, immersible pump need to be placed in underwater operation, and water is used as water source, can also immersible pump is cooled,
But due to having many impurity, such as soil, stone in water, it is brought into the impeller that pump can be usually blocked in pump, the impeller one of pump
Be stuck, not how long, pump will be burned.
The content of the invention
It is an object of the invention to provide a kind of Intelligent submersible pump, has the intelligence for closing pump automatically in the case of impeller is stuck
The immersible pump of energy function.
The technical solution adopted by the present invention：A kind of immersible pump with anti-jamming function includes current induction mechanism and control
Circuit processed；Described current induction mechanism is fixed on the delivery port of immersible pump, and function is the water outlet situation of sensing delivery port, is exported
Signal is to control circuit；Described control circuit function divides two parts, and the first function is that immersible pump normally opens after rigid connection enters power supply
Start building to make, current induction mechanism is without water outlet signal to control circuit within a certain period of time, and control circuit closes immersible pump, such as one
Interior current induction mechanism of fixing time has water outlet signal normal for immersible pump to control circuit, immersible pump normal work, the second function
In the course of work, current induction mechanism illustrates that impeller is stuck, control circuit closes diving suddenly without water outlet signal to control circuit
Pump.
Beneficial effects of the present invention：Realize in the case of impeller is stuck, close pump automatically, prevent pump to be burned.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is one embodiment of reclaimed water stream induction mechanism of the present invention.
Fig. 2 is second embodiment of reclaimed water stream induction mechanism of the present invention.
Fig. 3 is one embodiment of control circuit in the present invention.
Fig. 4 is second embodiment of control circuit in the present invention.
In figure：
1：Water out adapter 2：Lower carriage 1：Port 1：Push rod 1：Push up upper bit 6：Pressure bladder 1：Microswitch
8：Cavity 1：Upper bracket 1：Avris through hole 11：Outlet pipe 12：Lower carriage 2 13：Port 2 14：Push rod 2 15：
Pressure bladder 2 16：Upper bracket 2 17：Seal through hole 18：Seal pipe 19：Cavity 2 20：NE555P timers 1：
NE555P timers two.
Embodiment
Known by figure, a kind of immersible pump with anti-jamming function includes current induction mechanism and control circuit；Described
Current induction mechanism is fixed on the delivery port of immersible pump, and function is the water outlet situation of sensing delivery port, outputs signal to control electricity
Road；Described control circuit function divides two parts, and the first function is that immersible pump normally starts work, one after rigid connection enters power supply
In fixing time（Immersible pump is placed in water and worked, if impeller does not have stuck normal work after startup, delivery port has water to flow through quickly
Cross）Current induction mechanism is without water outlet signal to control circuit, and control circuit closes immersible pump, and such as current sense within a certain period of time
There is water outlet signal in mechanism to control circuit, immersible pump normal work, and the second function is current sense in immersible pump course of normal operation
Mechanism is answered to illustrate that impeller is stuck, control circuit closes immersible pump suddenly without water outlet signal to control circuit.
Fig. 1 is one embodiment of reclaimed water stream induction mechanism of the present invention.Known by Fig. 1, the current induction mechanism includes
Water swivel 1, lower carriage 1, push rod 1, pressure bladder 1, upper bracket 1 and microswitch 7；Described water out adapter 1 is latent
The water out adapter of water pump, there is delivery port on water out adapter 1, for connecting the outlet pipe 11 of water pump, also have avris on water out adapter 1
Through hole 10；Described lower carriage 1 is connected with water out adapter 1, there is port 1 thereon；Described push rod 1 is placed in lower carriage
At one 2 port 1, and push rod 1 is hinged on lower carriage 1, is had on push rod 1 at the upper bit 5 of top, is pushed up upper bit
It is placed at 5 at the avris through hole 10 on water out adapter 1, pushes up the left side that pressure bladder 1 is also headed at upper bit 5；Described
Pressure bladder 1 is placed at the avris through hole 10 on water out adapter 1, and is placed between water out adapter 1 and upper bracket 1,
By water out adapter 1 and the compression fit of upper bracket 1, the left side of pressure bladder 1 is pressed with being contacted at the top upper bit 5 of push rod 1
The right side of power capsule 1 communicates with the cavity 1 of upper bracket 1；Described upper bracket 1 is connected on water out adapter 1, upper branch
There is cavity 1 on frame 1；Described microswitch 7 is connected in the cavity 1 of upper bracket 1, and microswitch 7 is tactile
Dynamic button faces pressure bladder 1, and pushes up upper bit 5 and can compress the actuation button of microswitch 7, microswitch 7 it is normally opened
Contact is connected with control circuit.
Fig. 1 embodiments so work：Insert and work on power when water pump, it is anhydrous at water out adapter 1 if impeller is stuck
Stream, the normally opened contact of microswitch 7 are opened, and non-output signal is to control circuit；If impeller is normal, water pump normal work, water outlet
Have current at joint 1, push rod 1 is open, top upper bit 5 compress microswitch 7 actuation button, microswitch 7 it is normally opened
Contact closure, output signal to control circuit.
Fig. 2 is second embodiment of reclaimed water stream induction mechanism of the present invention.Known by Fig. 2, the current induction mechanism includes
Water swivel 1, lower carriage 2 12, push rod 2 14, pressure bladder 2 15, upper bracket 2 16, seal pipe 18 and microswitch 7；Described
Water out adapter 1 is the water out adapter of immersible pump, has delivery port on water out adapter 1, for connecting the outlet pipe 11 of water pump；Described
Lower carriage 2 12 is connected with water out adapter 1, there is port 2 13 thereon；Described push rod 2 14 is placed in the port of lower carriage 2 12
In 2 13, push rod 2 14 forms a prismatic pair with lower carriage 2 12, and heads on the lower surface of pressure bladder 2 15；Described pressure bladder
2 15 are placed between lower carriage 2 12 and upper bracket 2 16, by lower carriage 2 12 and the compression fit of upper bracket 2 16, pressure bladder
2 15 lower surface contacts with push rod 2 14, and the upper surface of pressure bladder 2 15 communicates with the cavity 2 19 of upper bracket 2 16；It is described
Upper bracket 2 16 be connected on lower carriage 2 12, have cavity 2 19 on upper bracket 2 16, cavity 2 19 is by pressure bladder 2 15
Insulated with the sealing of seal pipe 18 with the delivery port on water out adapter 1；Described seal pipe 18 is connected in water out adapter 1 and upper bracket
On 2 16, there is sealing through hole 17 in seal pipe 18；Described microswitch 7 is connected in the cavity 2 19 of upper bracket 2 16, and
And the actuation button of microswitch 7 faces pressure bladder 2 15, and push rod 2 14 can compress the actuation button of microswitch 7, micro-
The normally opened contact of dynamic switch 7 is connected by the sealing through hole 17 in seal pipe 18 with control circuit.
Fig. 2 embodiments so work：Insert and work on power when water pump, it is anhydrous at water out adapter 1 if impeller is stuck
Stream, the normally opened contact of microswitch 7 are opened, and non-output signal is to control circuit；If impeller is normal, water pump normal work, water outlet
There are current at joint 1, push rod 2 14 is open, and push rod 2 14 compresses the actuation button of microswitch 7, microswitch 7
Normally opened contact closes, and outputs signal to control circuit.
Fig. 3 is one embodiment of control circuit in the present invention.Known by Fig. 3, described control circuit include electric capacity C1,
Electric capacity C2, resistance R1, rectifier D1, voltage-stabiliser tube D2 composition capacitance-resistance step down type dc source, electric capacity C3, electric capacity C4, resistance R2,
The starting mode of pump circuit that normally opened contact, NE555P timers 1 and the relay KM of microswitch 7 are formed；Capacitance-resistance step down type is straight
Resistance R1 in stream power supply is in parallel with electric capacity C1 and one end accesses the one of rectifier D1 and exchanges incoming end, the extraneous electricity of other end access
Source, rectifier D1 another exchange incoming end also access extraneous power supply, and voltage-stabiliser tube D2 is in parallel with electric capacity C2, voltage-stabiliser tube D2 positive pole
Rectifier D1 negative DC output end is connect, voltage-stabiliser tube D2 negative pole connects rectifier D1 positive DC output end；Starting mode of pump
Electric capacity C3 in circuit is connected with resistance R2 and accesses capacitance-resistance step down type dc source, and wherein electric capacity C3 is terminated into capacitance-resistance step down type
The negative pole of dc source, resistance R2 terminate the positive pole into capacitance-resistance step down type dc source, by connecting point for electric capacity C3 and resistance R2
Triggering pin 2, the threshold values pin 6 of a contact and NE555P timers 1 in the normally opened contact of point access microswitch 7, it is micro-
The negative pole of another contact access capacitance-resistance step down type dc source in the normally opened contact of dynamic switch 7, NE555P timers 1
Reset pin 4, power pins 8 all access the positive pole of capacitance-resistance step down type dc source, the grounding pin 1 of NE555P timers 1
The negative pole of capacitance-resistance step down type dc source is accessed, the controlling switch 5 of NE555P timers 1 accesses resistance-capacitance depressurization through electric capacity C4
The negative pole of formula dc source, the output pin 3 of NE555P timers 1 access capacitance-resistance step down type dc source through relay KM
Negative pole, the power end of relay KM normally opened contact access water pump, control the power on/off of water pump.
Fig. 3 embodiments so work：Worked when water pump just plugs electricity, if impeller is stuck, microswitch 7
Normally opened contact is opened, and resistance R2 connects with electric capacity C3 is in charged state, and the voltage for just starting electric capacity C3 both ends is zero, so that electric capacity
C3 is low potential with resistance R2 branch of connecting, and timer NE555P output pin 3 is high potential, and relay KM is turned on, water
The power end of pump is powered, and when electric capacity C3 charges to a certain extent, the voltage rise at its both ends makes electric capacity C3 and electricity to a certain extent
The series connection branch for hindering R2 is high potential, and timer NE555P output pin 3 is low potential, and relay KM is not turned on, and makes water pump
The power end no power in the case of impeller is stuck；If impeller is normal, water pump normal work, the normally opened contact of microswitch 7
Closure, the voltage at electric capacity C3 both ends is zero always, and relay KM conductings, the power end of water pump is powered；Immersible pump normal work mistake
Cheng Zhong, if impeller is stuck, the normally opened contact of microswitch 7 is opened, and resistance R2 connects with electric capacity C3 is in charged state again,
The voltage for just having started electric capacity C3 both ends is zero, so that electric capacity C3 and resistance R2 branch of connecting are low potential, timer NE555P
Output pin 3 be high potential, relay KM conductings, the power end of water pump is powered, when electric capacity C3 chargings to a certain extent, it two
The voltage rise at end to a certain extent, makes electric capacity C3 and resistance R2 branch of connecting be high potential, timer NE555P output
Pin 3 is low potential, and relay KM is not turned on, and makes water pump power end no power in the case of impeller is stuck.
A capacitance-resistance step down type dc source Transient Suppression Diode in parallel in above-mentioned technical proposal, pacifies for protection circuit
Entirely.
A relay KM commutation diodes in parallel in above-mentioned technical proposal, for protective relay KM.
Fig. 4 is second embodiment of control circuit in the present invention.Known by Fig. 4, described control circuit includes transformer
21st, the D.C. regulated power supply of rectifier D3, electric capacity C5 composition, in addition to electric capacity C6, electric capacity C7, resistance R3, microswitch 7 are normal
Open contact, NE555P timers 2 22, water pump relay KM2 and signal relay KM1；Transformer 21 in D.C. regulated power supply
Input accesses extraneous power supply, output termination rectifier D3 exchange incoming end, electric capacity C5 access rectifier D3 in parallel direct current
Output end；Electric capacity C6 is connected with resistance R3 and accesses D.C. regulated power supply, and wherein electric capacity C6 is terminated into D.C. regulated power supply just
Pole, resistance R3 terminate the negative pole into D.C. regulated power supply, the branch access NE555P timers of connecting by electric capacity C6 with resistance R3
2 22 triggering pin 2, threshold values pin 6, water pump relay KM2 and signal relay KM1 normally-closed contact are connected and accessed straight
Voltage-stabilized power supply is flowed, wherein water pump relay KM2 terminates the positive pole into D.C. regulated power supply, signal relay KM1 normally-closed contact
The negative pole into D.C. regulated power supply is terminated, the normally opened contact of microswitch 7 is in parallel with signal relay KM1 normally-closed contact,
The reset pin 4 of NE555P timers 2 22, power pins 8 all access the positive pole of D.C. regulated power supply, NE555P timers two
22 grounding pin 1 accesses the negative pole of D.C. regulated power supply, and the controlling switch 5 of NE555P timers 2 22 accesses directly through electric capacity C3
The negative pole of voltage-stabilized power supply is flowed, the output pin 3 of NE555P timers 2 22 accesses D.C. regulated power supply through signal relay KM1
Negative pole, water pump relay KM2 normally opened contact access the power end of water pump, control the power on/off of water pump.
Fig. 4 embodiments so work：Worked when water pump just plugs electricity, if impeller is stuck, microswitch 7
Normally opened contact is opened, and resistance R3 connects with electric capacity C6 is in charged state, and the voltage for just starting electric capacity C6 both ends is zero, so that electric capacity
C6 and resistance R3 branch of connecting are high potential, and the output pins 3 of NE555P timers 2 22 is low potential, signal relay
KM1 is not turned on, and signal relay KM1 normally-closed contact closure, water pump relay KM2 is powered, and the power end of water pump is powered, and works as electricity
Hold C6 chargings to a certain extent, the voltage at its both ends is raised to a certain extent, so that electric capacity C6 is with resistance R3 branch of connecting
Low potential, the output pin 3 of NE555P timers 2 22 is high potential, and signal relay KM1 is turned on, signal relay KM1's
Normally-closed contact disconnects, water pump relay KM2 no powers, the power end no power of water pump；If impeller is normal, the normal work of water pump
Make, the normally opened contact closure of microswitch 7, water pump relay KM2 is powered, and the power end of water pump is powered；Immersible pump normal work
During, if impeller is stuck, the normally opened contact of microswitch 7 is opened, because signal relay KM1 normally-closed contact also breaks
Open, water pump relay KM2 is not turned on, and makes water pump power end no power in the case of impeller is stuck.
A water pump relay KM2 commutation diodes in parallel in above-mentioned technical proposal, for protecting water pump relay KM2.
In addition to the implementation, the present invention also has other embodiment.It is all to be formed using equivalent substitution or equivalent transformation
Technical scheme, all fall within the protection domain of application claims.
Claims (5)
- A kind of 1. immersible pump with anti-jamming function, it is characterised in that：A kind of immersible pump with anti-jamming function includes Current induction mechanism and control circuit；Described current induction mechanism is fixed on the delivery port of immersible pump, and function is sensing water outlet The water outlet situation of mouth, outputs signal to control circuit；Described control circuit function divides two parts, and the first function is that rigid connection enters electricity Behind source, immersible pump normally starts work, within a certain period of time current induction mechanism without water outlet signal to control circuit, control circuit Immersible pump is closed, such as current induction mechanism has water outlet signal to control circuit within a certain period of time, immersible pump normal work, and second Function is in immersible pump course of normal operation, and current induction mechanism illustrates that impeller is stuck suddenly without water outlet signal to control circuit, Control circuit closes immersible pump.
- A kind of 2. immersible pump with anti-jamming function according to claim 1, it is characterised in that：The current induction mechanism Including water out adapter, lower carriage one, push rod one, pressure bladder one, upper bracket one and microswitch；Have on described water out adapter Delivery port, for connecting the outlet pipe of water pump, there is avris through hole on water out adapter；Described lower carriage one is consolidated with water out adapter Even, there is port one thereon；Described push rod one is placed at the port one of lower carriage one, and push rod one is hinged on lower carriage On one, have on push rod one at the upper bit of top, push up the avris through hole being placed at upper bit on water out adapter, push up at upper bit Also head on the left side of pressure bladder one；Described pressure bladder one is placed in the avris through hole on water out adapter, and is placed in Between water out adapter and upper bracket one, by water out adapter and the compression fit of upper bracket one, left side and the push rod one of pressure bladder one Top upper bit at contact, the right side of pressure bladder one communicates with the cavity one of upper bracket one；Described upper bracket one is connected in On water out adapter, there is cavity one on upper bracket one；Described microswitch is connected in the cavity one of upper bracket one, and fine motion The actuation button of switch faces pressure bladder one, and pushes up the actuation button that top potential energy compresses microswitch, microswitch Normally opened contact is connected with control circuit.
- A kind of 3. immersible pump with anti-jamming function according to claim 1, it is characterised in that：The current induction mechanism Including water out adapter, lower carriage two, push rod two, pressure bladder two, upper bracket two, seal pipe and microswitch；Described water outlet connects There is delivery port on head, for connecting the outlet pipe of water pump；Described lower carriage two is connected with water out adapter, there is port two thereon； Described push rod two is placed in the port two of lower carriage two, and push rod two forms a prismatic pair with lower carriage two, and heads on pressure The lower surface of capsule two；Described pressure bladder two is placed between lower carriage two and upper bracket two, by lower carriage two and upper bracket two Compression fit, the lower surface of pressure bladder two contact with push rod two, the upper surface of pressure bladder two and the cavity two-phase of upper bracket two It is logical；Described upper bracket two is connected on lower carriage two, has cavity two on upper bracket two, cavity two is by pressure bladder two and sealing The seal of tube insulate with the delivery port on water out adapter；Described seal pipe is connected on water out adapter and upper bracket two, seal pipe On have sealing through hole；Described microswitch is connected in the cavity two of upper bracket two, and microswitch actuation button face Pressure bladder two, and push rod two can compress the actuation button of microswitch, and the normally opened contact of microswitch passes through in seal pipe Sealing through hole be connected with control circuit.
- A kind of 4. immersible pump with anti-jamming function according to claim 1, it is characterised in that：Described control circuit The capacitance-resistance step down type dc source formed including electric capacity C1, electric capacity C2, resistance R1, rectifier D1, voltage-stabiliser tube D2, electric capacity C3, electricity Hold the starting mode of pump circuit of C4, resistance R2, the normally opened contact of microswitch 7, NE555P timers one and relay KM compositions；Resistance The resistance R1 held in buck dc source exchanges incoming end, the other end with the one of electric capacity C1 parallel connections and one end access rectifier D1 Extraneous power supply is accessed, rectifier D1 another exchange incoming end also accesses extraneous power supply, and voltage-stabiliser tube D2 is in parallel with electric capacity C2, voltage stabilizing Pipe D2 positive pole connects rectifier D1 negative DC output end, and voltage-stabiliser tube D2 negative pole connects rectifier D1 positive DC output End；Electric capacity C3 in starting mode of pump circuit is connected with resistance R2 and accesses capacitance-resistance step down type dc source, and wherein electric capacity C3 is terminated Enter the negative pole of capacitance-resistance step down type dc source, resistance R2 terminates the positive pole into capacitance-resistance step down type dc source, by electric capacity C3 and electricity Hinder the contact in the normally opened contact of R2 series connection branch access microswitch 7 and triggering pin 2, the valve of NE555P timers one It is worth pin 6, the negative pole of another contact access capacitance-resistance step down type dc source in the normally opened contact of microswitch 7, NE555P is fixed When the reset pin 4 of device one, power pins 8 all access the positive pole of capacitance-resistance step down type dc source, NE555P timers one connect Ground pin 1 accesses the negative pole of capacitance-resistance step down type dc source, and the controlling switch 5 of NE555P timers one accesses capacitance-resistance through electric capacity C4 The negative pole of buck dc source, the output pin 3 of NE555P timers one access capacitance-resistance step down type direct current through relay KM The negative pole in source, the power end of relay KM normally opened contact access water pump.
- A kind of 5. immersible pump with anti-jamming function according to claim 1, it is characterised in that：Described control circuit The D.C. regulated power supply formed including transformer, rectifier D3, electric capacity C5, in addition to electric capacity C6, electric capacity C7, resistance R3, fine motion Normally opened contact, NE555P timers two, water pump relay KM2 and the signal relay KM1 of switch 7；In D.C. regulated power supply Transformer inputs access extraneous power supply, output termination rectifier D3 exchange incoming end, electric capacity C5 access rectifier D3 in parallel DC output end；Electric capacity C6 is connected with resistance R3 and accesses D.C. regulated power supply, and wherein electric capacity C6 is terminated into DC voltage-stabilizing electricity The positive pole in source, resistance R3 terminate the negative pole into D.C. regulated power supply, the branch access NE555P that connects by electric capacity C6 with resistance R3 Triggering pin 2, the threshold values pin 6 of timer two, water pump relay KM2 and signal relay KM1 normally-closed contact are connected and connect Enter D.C. regulated power supply, wherein water pump relay KM2 terminates the positive pole into D.C. regulated power supply, and signal relay KM1's is normally closed Tip side accesses the negative pole of D.C. regulated power supply, and the normally opened contact of microswitch 7 and signal relay KM1 normally-closed contact are simultaneously Connection, the reset pin 4 of NE555P timers two, power pins 8 all access the positive pole of D.C. regulated power supply, NE555P timers two Grounding pin 1 access the negative pole of D.C. regulated power supply, it is steady that the controlling switch 5 of NE555P timers two through electric capacity C3 accesses direct current The negative pole of voltage source, the output pin 3 of NE555P timers two access the negative pole of D.C. regulated power supply through signal relay KM1, The power end of water pump relay KM2 normally opened contact access water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710529464.5A CN107588013A (en) | 2017-07-02 | 2017-07-02 | A kind of immersible pump with anti-jamming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710529464.5A CN107588013A (en) | 2017-07-02 | 2017-07-02 | A kind of immersible pump with anti-jamming function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107588013A true CN107588013A (en) | 2018-01-16 |
Family
ID=61046070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710529464.5A Withdrawn CN107588013A (en) | 2017-07-02 | 2017-07-02 | A kind of immersible pump with anti-jamming function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107588013A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939979A (en) * | 1982-08-27 | 1984-03-05 | Mitsubishi Heavy Ind Ltd | Blockade preventing apparatus for concrete pump |
| JPH0491392A (en) * | 1990-08-02 | 1992-03-24 | Komatsu Zenoah Co | Blockage-preventing control device for shredding pump |
| CN204041409U (en) * | 2014-08-28 | 2014-12-24 | 胡君分 | A kind of water pump water shortage protective device |
| CN204041408U (en) * | 2014-08-28 | 2014-12-24 | 胡君分 | A kind of water pump water shortage protective device |
| CN104500417A (en) * | 2015-01-09 | 2015-04-08 | 浙江新控泵业有限公司 | Frequent start-preventing water pump |
| CN204456295U (en) * | 2014-12-22 | 2015-07-08 | 郑汉华 | Discharge switch and automatic pump controller |
-
2017
- 2017-07-02 CN CN201710529464.5A patent/CN107588013A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939979A (en) * | 1982-08-27 | 1984-03-05 | Mitsubishi Heavy Ind Ltd | Blockade preventing apparatus for concrete pump |
| JPH0491392A (en) * | 1990-08-02 | 1992-03-24 | Komatsu Zenoah Co | Blockage-preventing control device for shredding pump |
| CN204041409U (en) * | 2014-08-28 | 2014-12-24 | 胡君分 | A kind of water pump water shortage protective device |
| CN204041408U (en) * | 2014-08-28 | 2014-12-24 | 胡君分 | A kind of water pump water shortage protective device |
| CN204456295U (en) * | 2014-12-22 | 2015-07-08 | 郑汉华 | Discharge switch and automatic pump controller |
| CN104500417A (en) * | 2015-01-09 | 2015-04-08 | 浙江新控泵业有限公司 | Frequent start-preventing water pump |
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| PB01 | Publication | ||
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Application publication date: 20180116 |