CN103362831A - Control method for submerged pump - Google Patents
Control method for submerged pump Download PDFInfo
- Publication number
- CN103362831A CN103362831A CN2013102687470A CN201310268747A CN103362831A CN 103362831 A CN103362831 A CN 103362831A CN 2013102687470 A CN2013102687470 A CN 2013102687470A CN 201310268747 A CN201310268747 A CN 201310268747A CN 103362831 A CN103362831 A CN 103362831A
- Authority
- CN
- China
- Prior art keywords
- pressure
- submersible pump
- bearing post
- controlling method
- plectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a control method for a submerged pump. The submerged pump comprises a submerged pump conveying medium outlet, a sealed motor cabin and a pressure switch, wherein the conveying medium outlet is connected with a pipeline; a valve used for controlling the conveying medium pressure in the submerged pump is arranged on the pipeline; the motor cabin is provided with an opening; an elastic part is hermetically arranged at the opening; the pressure switch is arranged in the motor cabin; the pressure switch comprises a press device and a microswitch; the press device comprises a pressure-bearing column and a reset spring; one end of the pressure-bearing column is arranged in correspondence to the elastic part, and the other end of the pressure-bearing column is against the reset spring; and a downward pressing part of the pressure-bearing column corresponds to a button of the microswitch. The submerged pump has the advantages of simple structure and convenience for operation.
Description
Technical field
The present invention relates to a kind of submersible pump controlling method, particularly a kind of method that changes the control submersible pump switch by the pressure of fed sheet of a media.
Background technique
Submersible pump (Submerged pump) is the water treatment instrument that the pump housing and motor can be immersed in the water work.Submersible pump and common suction engine difference are that submersible pump is operated under water, and suction engine is worked on the ground mostly.The working principle of common centrifugal submersible pumps is: before the submersible pump start, must be full of liquid in suction pipe and the submersible pump.After the start, the impeller High Rotation Speed, the liquid in the submersible pump is along with impeller rotates together, under the effect of centrifugal force, fly away from impeller and outwards penetrate, the liquid of ejaculation speed in the pump case explosion chamber is slack-off gradually, pressure increases gradually, then flows out from submersible pump outlet, waste pipe.At this moment, form the vacuum low-pressure district that does not both have air also not have liquid in the blade center on every side owing to liquid is thrown toward, the liquid in the liquid pool is under the atmospheric effect of pond face, in suction pipe flows into submersible pump.Liquid continuously is pumped up from liquid pool like this and is continuously flowed out from discharge tube.Submersible pump is widely used in the aspects such as field irrigation, draining and farming and animal husbandry, industrial and mining enterprise, urban water supply, draining.The general flow of submersible pump can reach (5m
3~ 650m
3) per hour, lift can reach 10 ~ 550 meters.
The motor that submersible pump is used has dry type (motor all is sealed in the motor bin), the half dry type (seal stator of motor, and rotor turns round in water), oil-filled type (the oil-filled in case moisture of motor internal is invaded winding) and wet type (motor internal water-filling, stator and rotor all turn round in water) etc. type, front 3 kinds all need sealing and make installation precision and have relatively high expectations.
The water outlet of submersible pump generally is connected with waste pipe, and the outlet port of this waste pipe is provided with valve.Submersible pump is at first opened submersible pump in use, then opens the valve water.When the length of waste pipe is longer, open submersible pump after, also need to walk a segment distance could arrive the valve place of waste pipe end, and this moment, submersible pump was in operating condition, but its water that pumps does not use, just so that the pressure rise in the submersible pump.The rising of this pressure, pressure hour only can cause the waste of electric power, then can damage submersible pump when pressure is large.
Summary of the invention
The object of the invention provides a kind of submersible pump controlling method.
For achieving the above object, the technical solution used in the present invention is: a kind of submersible pump controlling method comprises:
The outlet of one submersible pump fed sheet of a media, this fed sheet of a media outlet is connected with pipeline, and described pipeline is provided with to control the valve of fed sheet of a media pressure in the submersible pump;
The motor bin of one sealing, described motor bin is provided with an opening, and sealing is provided with an elastic member on this opening;
One pressure switch, this pressure switch are located in the described motor bin; Described pressure switch comprises press device and sensitive switch, and described press device comprises pressure-bearing post and Returnning spring; The corresponding described elastic member setting of one end of described pressure-bearing post, the other end and described Returnning spring are conflicted and are arranged; The setting corresponding to the button of described sensitive switch of the pressing member of described pressure-bearing post.
Preferred technological scheme is: described Returnning spring is Compress Spring.
Preferred technological scheme is: described Compress Spring is installed in the mounting hole of a Returnning spring fitting seat.
Preferred technological scheme is: the mounting hole of described Returnning spring fitting seat is through hole, and the bottom of this through hole is provided with screw.
Preferred technological scheme is: described pressing member is a plectrum, and this plectrum is provided with through hole, and described pressure-bearing post wears described through hole setting.
Preferred technological scheme is: described pressure-bearing post is provided with protuberance, the conflict side setting of described plectrum of this protuberance.
Preferred technological scheme is: described mounting hole hole wall is provided with rectangular opening, and an end of described plectrum is located in the described rectangular opening.
Preferred technological scheme is: described mounting hole hole wall is provided with vertical groove, and an end of described plectrum is located in the described groove.
Preferred technological scheme is: described elastic member is a rubber sheet gasket.
Working principle of the present invention is: the pressure that utilizes the pressure-bearing post to experience fed sheet of a media in the submersible pump changes, when the pressure rise of fed sheet of a media to a certain degree the time, the resistance that the pressure-bearing post overcomes Returnning spring moves down, when the pressure-bearing post moves a certain distance, will press the button of sensitive switch, the motor that this sensitive switch then cuts out submersible pump does not turn round it.When the pressure of fed sheet of a media returned to normal state, Returnning spring was so that the pressure-bearing post is mobile in the other direction, and at this moment pressure-bearing post and microswitch push-button disengage, thereby so that motor for submerged pump recovers running.The pressure of fed sheet of a media then is by valve control, and when valve closing, the pressure rise of fed sheet of a media then triggers sensitive switch motor for submerged pump is closed in the submersible pump.When valve open, fed sheet of a media pressure recovers normal in the submersible pump, and the pressing member of pressure-bearing post leaves the button of sensitive switch, and motor for submerged pump is opened.So the present invention utilizes valve control submersible pump internal pressure, recycle this pressure control motor for submerged pump switch.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1, microswitch structure of the present invention is compact, so it can be arranged in the submersible pump, thus the switch of convenient control submersible pump.
2, the present invention has advantage simple in structure, easy to operate.
Description of drawings
The submersible pump schematic diagram of accompanying drawing 1 for having pressure switch;
Accompanying drawing 2 is the A section enlarged view (having pressed microswitch push-button) of accompanying drawing 1;
Accompanying drawing 3 is the A section enlarged view (not pressing microswitch push-button) of accompanying drawing 1;
Accompanying drawing 4 is the explosive view of pressure switch of the present invention;
Accompanying drawing 5 is the electrical schematic with submersible pump of pressure switch;
Accompanying drawing 6 is the first pressure-bearing post, plectrum and Returnning spring fitting seat assembling schematic diagram;
Accompanying drawing 7 is the second pressure-bearing post, plectrum and Returnning spring fitting seat assembling schematic diagram.
In the above accompanying drawing: 1, submersible pump; 2, fed sheet of a media flows to; 3, elastic member; 4, pressure-bearing post; 5, Returnning spring; 6, Returnning spring fitting seat; 7, plectrum; 8, sensitive switch; 9, screw; 10, pressure switch; 11, heat protector; 12, float switch; 13, electric capacity; 14, motor.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not to limit the enforceable qualifications of the present invention, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under the effect that the present invention can produce and the purpose that can reach, all should still drop on disclosed technology contents and get in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under without essence change technology contents, when also being considered as the enforceable category of the present invention.
Embodiment: a kind of submersible pump controlling method
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4 and accompanying drawing 5, a kind of controlling method of submersible pump 1 comprises:
The outlet of one submersible pump, 1 fed sheet of a media, this fed sheet of a media outlet is connected with pipeline, and described pipeline is provided with to control the valve of submersible pump 1 interior fed sheet of a media pressure;
The motor bin of one sealing, described motor bin is provided with an opening, and sealing is provided with an elastic member 3 on this opening;
One pressure switch, this pressure switch are located in the described motor bin; Described pressure switch comprises press device and sensitive switch 8, and described press device comprises pressure-bearing post 4 and Returnning spring 5; The corresponding described elastic member 3 of one end of described pressure-bearing post 4 arranges, and the other end and described Returnning spring 5 are conflicted and arranged; The corresponding setting of button of the pressing member of described pressure-bearing post 4 and described sensitive switch 8.
The effect of press device is: bear the pressure of described submersible pump 1 fed sheet of a media, when pressure rise, trigger the button of sensitive switch 8.The effect of sensitive switch is the start-stop of control motor for submerged pump.In the circuit of the positive and negative Wiring port access submersible pump 1 of sensitive switch 8.Sensitive switch 8 can adopt prior art to make, and its requirement is: 1, the button of sensitive switch 8 is under the pressed state of press device, and the circuit of submersible pump 1 is for closing, thereby so that motor for submerged pump close; 2, when press device did not contact with the button of sensitive switch 8, the circuit of submersible pump 1 was path, thereby so that motor for submerged pump open.So sensitive switch specifically can be selected position limited inching switch, can claim micro limit switch, micro limit switch again.The design at other position of described submersible pump 1 can be with reference to the design of existing submersible pump.
The fed sheet of a media of general submersible pump 1 flows to 2 as shown in Figure 1.The water outlet of submersible pump 1 is that the fed sheet of a media outlet generally is connected with waste pipe, and the outlet port of this waste pipe is provided with valve, and for example the valve for the submersible pump 1 of watering flowers is spray gun.When not opening spray gun when the motor of opening submersible pump, behind the motor rotation certain hour of submersible pump 1, fed sheet of a media arrives spray gun, but do not open owing to spray gun this moment, so the fed sheet of a media in the waste pipe of submersible pump 1 and submersible pump 1 housing is along with the running of the motor of submersible pump 1, its pressure raises, when this pressure-acting during to press device, trigger the button of sensitive switch 8, the motor of final plant closure submersible pump 1.When opening spray gun, then along with fed sheet of a media outside spray gun is released into waste pipe, the pressure of fed sheet of a media returns to normally, and at this moment press device separates with the button of sensitive switch 8, and the motor of then opening submersible pump 1 transfers out fed sheet of a media continuously under the effect of motor.The controlling method of submersible pump of the present invention: when submersible pump is under power connection and the motor open mode, the operation by opening and closing valve is to open and close the motor of submersible pump 1.When opening valve such as spray gun, submersible pump 1 internal pressure is normal, and the pressure-bearing post does not act on sensitive switch, and motor leaves; Throttle down such as spray gun, this internal pressure of diving under water rises, and the pressing member of pressure-bearing post acts on sensitive switch, and motor closes.
Described press device comprises pressure-bearing post 4 and Returnning spring 5; One end of described pressure-bearing post 4 is the upper surface of the diameter major part of pressure-bearing post 4 shown in the accompanying drawing 4, indirectly bear the pressure of described submersible pump 1 fed sheet of a media, described pressure-bearing post 4 also only has this end to bear the pressure of described submersible pump 1 fed sheet of a media, and the pressure of described submersible pump 1 fed sheet of a media is not all born at other position of pressure-bearing post 4, because only in this way, the resistance that could overcome so that pressure-bearing post 4 can bear the pressure of fed sheet of a media Returnning spring moves, so that triggers the button of described sensitive switch 8.If the pressure of described submersible pump 1 fed sheet of a media is also born at other position of pressure-bearing post 4, so because counteracted by pressure, 4 on pressure-bearing post can not move along with the increase of the pressure of fed sheet of a media.
The other end of pressure-bearing post 4 is the lower surface of the diameter major part of pressure-bearing post 4 shown in the accompanying drawing 4, and it and described Returnning spring 5 are conflicted and arranged.Returnning spring 5 has two aspect effects, 1, has certain precompression because of spring, when ambient pressure overcame this precompression, Returnning spring was mobile under the effect of ambient pressure, so can be by selecting to have the spring of different precompressions with the pressure of fed sheet of a media in the corresponding submersible pump.2, when the ambient pressure that Returnning spring is applied was eliminated, then Returnning spring restored to the original state.The present embodiment is designed to one section with the structure of pressure-bearing post 4 and is the larger cap shape of diameter, and another section is the less column of diameter, then forms stepped part between cap shape section and the column section, and with the described spring setting of conflicting of this stepped part.
The pressing member of described pressure-bearing post 4 refers under a state with the corresponding setting of button of described sensitive switch 8, and the button that the pressing member of pressure-bearing post 4 can act on sensitive switch 8 namely triggers the button of sensitive switch 8.Can directly extend one one on the described pressure-bearing post 4 as pressing member, namely pressure-bearing post 4 is one-body molded with pressing member.Also can design separately a pressing member.The button of sensitive switch 8 is located at the below of pressing member, and the interval arranges between the two, moves down along with pressure-bearing post 4 and work as pressing member, and pressing member can act on the button of sensitive switch 8.Sensitive switch 8 is with respect to pressure-bearing post 4, and it will be fixedly installed, and pressure-bearing post 4 then will move setting.
Returnning spring 5 can be spring sheet, but the mode of execution of described Returnning spring 5 the bests is Compress Springs.And preferred mode of execution is that described Compress Spring is installed in the mounting hole of Returnning spring fitting seat 6.Under the restriction of mounting hole, Compress Spring can only move along mounting hole under the constraint of mounting hole like this.The mounting hole of described Returnning spring fitting seat 6 can be blind hole, at this moment as long as the precompression of Compress Spring is set, surpasses so this pressure, then triggers the button of sensitive switch.But because the precompression of Compress Spring generally is constant, then Compress Spring is in case selected, and the precompression of Compress Spring is also thereupon selected so, therefore at this moment as long as when the pressure of fed sheet of a media surpasses this precompression, will close motor for submerged pump.Best mode of execution is that mounting hole is designed to through hole, and screw 9 is set in through hole.And screw 9 can be by mobile with compression or unclamp Compress Spring, thereby regulates the precompression of Compress Spring.Finally reaching fed sheet of a media with this can trigger the effect that submersible pump 1 motor is closed down under different pressure.
Preferred embodiment for described pressing member is designed to independent parts, laminar plectrum 7 as shown in Figure 4, the centre has circular hole, the column section of pressure-bearing post 4 is passed the hole and is arranged, the conflict upper edge of plectrum 7, the lower edge of the cap shape section of pressure-bearing post, the lower edge of plectrum 7 then is against the upper end of Compress Spring, and plectrum 7 can move along with moving up and down of pressure-bearing post 4 like this.One end of plectrum is used for triggering the button of sensitive switch 4.
Pressure-bearing post 4 also can not adopt the structure shown in the accompanying drawing 4, but at the middle part, also can a protuberance be set in the bottom, be used for the upper edge for plectrum, the lower edge of plectrum 7 then is against the upper end of Compress Spring, and plectrum 7 can move along with moving up and down of pressure-bearing post 4 like this.One end of plectrum is used for triggering the button of sensitive switch 4.
Shown in accompanying drawing 4 and accompanying drawing 6, described mounting hole hole wall is provided with rectangular opening, and the rectangular opening of a side equates with the width of an end of plectrum 7, so that an end of plectrum 7 slip and spacing in this hole, so that plectrum 7 is not offset when moving up and down.The rectangular opening of another side is then larger, so that the circle of plectrum 7 width biggest places can be passed.Because when the assembling pressure switch, plectrum 7 need to pass to arrange from rectangular opening.
Another kind of mode of execution is referring to shown in the accompanying drawing 7, described mounting hole hole wall is provided with vertical groove, concrete structure refers to that this groove directly extends to the upper end of mounting hole, and the width at the two ends of plectrum 7 is respectively at the width of vertical groove coupling like this, thereby so that plectrum 7 under groove spacing, move up and down.
For dry submersible pump, owing to being provided with for the sealed electrical cabin of putting motor in the submersible pump.So at opening of motor bin design, sealing is provided with elastic member 3 on this opening, the corresponding described elastic member 3 of that end of the pressure that bears described submersible pump 1 fed sheet of a media of the pressure-bearing post 4 of described press device arranges.The below that the upper end of pressure-bearing post 4 is against elastic member 3 arranges, and when elastic member 3 bears the pressure of fed sheet of a media, elastic strain can occur, and this elastic strain meeting is exerted pressure so that pressure-bearing post 4 moves to pressure-bearing post 4.Described elastic member 3 is a rubber sheet gasket.Because the elastic strain of this material of rubber is larger.This is the mode of execution of an optimum, because the design of sealed electrical cabin has been ripe technology, and the lighting outlet of sensitive switch also need not to carry out Seal Design and is connected directly in the circuit of submersible pump 1 in the present embodiment.Generally Returnning spring fitting seat 6 is fixedly installed in the motor bin, again sensitive switch 8 is fixed on the Returnning spring fitting seat 6, as shown in Figure 4, be fixed with two erection columns on the Returnning spring fitting seat 6, correspondence is provided with two mounting holes on the sensitive switch 8, when assembling, sensitive switch 8 is set on the Returnning spring fitting seat 6.
The electrical equipment principle of the submersible pump 1 of the present embodiment has pressure switch 10, heat protector 11, float switch 12, electric capacity 13 and motor 14 and corresponding electric wire as shown in Figure 5 in the accompanying drawing 5.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (9)
1. submersible pump controlling method is characterized in that: comprising:
The outlet of one submersible pump fed sheet of a media, this fed sheet of a media outlet is connected with pipeline, and described pipeline is provided with to control the valve of fed sheet of a media pressure in the submersible pump;
The motor bin of one sealing, described motor bin is provided with an opening, and sealing is provided with an elastic member on this opening;
One pressure switch, this pressure switch are located in the described motor bin; Described pressure switch comprises press device and sensitive switch, and described press device comprises pressure-bearing post and Returnning spring; The corresponding described elastic member setting of one end of described pressure-bearing post, the other end and described Returnning spring are conflicted and are arranged; The setting corresponding to the button of described sensitive switch of the pressing member of described pressure-bearing post.
2. submersible pump controlling method according to claim 1, it is characterized in that: described Returnning spring is Compress Spring.
3. submersible pump controlling method according to claim 2, it is characterized in that: described Compress Spring is installed in the mounting hole of a Returnning spring fitting seat.
4. submersible pump controlling method according to claim 3, it is characterized in that: the mounting hole of described Returnning spring fitting seat is through hole, and the bottom of this through hole is provided with screw.
5. submersible pump controlling method according to claim 1, it is characterized in that: described pressing member is a plectrum, and this plectrum is provided with through hole, described pressure-bearing post wears described through hole setting.
6. submersible pump controlling method according to claim 5, it is characterized in that: described pressure-bearing post is provided with protuberance, the conflict side setting of described plectrum of this protuberance.
7. submersible pump controlling method according to claim 1, it is characterized in that: described mounting hole hole wall is provided with rectangular opening, and an end of described plectrum is located in the described rectangular opening.
8. submersible pump controlling method according to claim 1, it is characterized in that: described mounting hole hole wall is provided with vertical groove, and an end of described plectrum is located in the described groove.
9. submersible pump controlling method according to claim 1, it is characterized in that: described elastic member is a rubber sheet gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102687470A CN103362831A (en) | 2013-06-28 | 2013-06-28 | Control method for submerged pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102687470A CN103362831A (en) | 2013-06-28 | 2013-06-28 | Control method for submerged pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103362831A true CN103362831A (en) | 2013-10-23 |
Family
ID=49364896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102687470A Pending CN103362831A (en) | 2013-06-28 | 2013-06-28 | Control method for submerged pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103362831A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425151A (en) * | 2019-07-13 | 2019-11-08 | 台州市双龙泵业有限公司 | A kind of high-efficient energy-saving environment friendly immersible pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2096126U (en) * | 1991-08-06 | 1992-02-12 | 黄裕峰 | Multi-purpose pressure switch |
| JPH0963437A (en) * | 1995-08-24 | 1997-03-07 | Sawafuji Electric Co Ltd | Switch device for bilge pump |
| CN2718277Y (en) * | 2004-07-26 | 2005-08-17 | 刘刚 | Automatic submersible pump |
| US20100288616A1 (en) * | 2007-04-27 | 2010-11-18 | Wang-Ken Lee | Adjustable pressure gauged switch for electric valve-less pumps |
| CN201936809U (en) * | 2011-01-29 | 2011-08-17 | 广东沪顺电器有限公司 | High voltage water pressure switch |
| CN201966131U (en) * | 2011-04-30 | 2011-09-07 | 广东沪顺电器有限公司 | Improved high water pressure switch |
| CN202124023U (en) * | 2011-08-03 | 2012-01-25 | 朱伟 | Hand-held diving cleaner |
-
2013
- 2013-06-28 CN CN2013102687470A patent/CN103362831A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2096126U (en) * | 1991-08-06 | 1992-02-12 | 黄裕峰 | Multi-purpose pressure switch |
| JPH0963437A (en) * | 1995-08-24 | 1997-03-07 | Sawafuji Electric Co Ltd | Switch device for bilge pump |
| CN2718277Y (en) * | 2004-07-26 | 2005-08-17 | 刘刚 | Automatic submersible pump |
| US20100288616A1 (en) * | 2007-04-27 | 2010-11-18 | Wang-Ken Lee | Adjustable pressure gauged switch for electric valve-less pumps |
| CN201936809U (en) * | 2011-01-29 | 2011-08-17 | 广东沪顺电器有限公司 | High voltage water pressure switch |
| CN201966131U (en) * | 2011-04-30 | 2011-09-07 | 广东沪顺电器有限公司 | Improved high water pressure switch |
| CN202124023U (en) * | 2011-08-03 | 2012-01-25 | 朱伟 | Hand-held diving cleaner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425151A (en) * | 2019-07-13 | 2019-11-08 | 台州市双龙泵业有限公司 | A kind of high-efficient energy-saving environment friendly immersible pump |
| CN110425151B (en) * | 2019-07-13 | 2024-05-03 | 台州市双龙泵业有限公司 | Efficient energy-saving environment-friendly submersible pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110397603A (en) | A kind of water pump | |
| WO2015187976A3 (en) | Fuel dispenser pump assembly | |
| US3992130A (en) | Sump pump system and pressure responsive switch assembly therefor | |
| CN203463301U (en) | Pressure control device for submersible pump | |
| CN103362831A (en) | Control method for submerged pump | |
| CN103362830A (en) | Pressure control device for submerged pump | |
| CN204460748U (en) | Instant heating type drinking water heating device | |
| CN203463303U (en) | Submersible pump | |
| CN203463302U (en) | Novel submersible pump | |
| CN203466124U (en) | Pressure switch for submerged pumps | |
| US20160108607A1 (en) | Water Pump Pressure Switch Providing Automatic Power Shut-Off To A Well Pump | |
| CN2721923Y (en) | Water-deficient protector of water pump | |
| JP2008208965A (en) | Check valve and pump device | |
| CN2721924Y (en) | Water-deficient self-adjusting protector of water pump | |
| CN211314679U (en) | Automatic liquid pump | |
| CN207568868U (en) | A kind of integration electric pump | |
| CN108678133B (en) | Ground and underground dual-purpose intelligent floor drain | |
| CN209164089U (en) | The anti-structure of backflowing of vacuum pump with oil pump | |
| CN2844515Y (en) | Water-loss protector of water pump | |
| CN104534682A (en) | Instant drinking water heating device | |
| CN205859311U (en) | Shit gathering equipment water pressurizer | |
| CN2784631Y (en) | Water shortage protector for water pump | |
| CN202381343U (en) | Submersible pump with seal structure | |
| CN200975021Y (en) | Automatic water draining apparatus for proton subterranean equipment machinery room | |
| CN2777739Y (en) | Automatic controlled protector for water pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131023 |