CN103758764B - A kind of method of multiple stage water pump flexible pipe coupled in series - Google Patents
A kind of method of multiple stage water pump flexible pipe coupled in series Download PDFInfo
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- CN103758764B CN103758764B CN201310729396.9A CN201310729396A CN103758764B CN 103758764 B CN103758764 B CN 103758764B CN 201310729396 A CN201310729396 A CN 201310729396A CN 103758764 B CN103758764 B CN 103758764B
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Abstract
A method for multiple stage water pump flexible pipe coupled in series, belongs to non-varactor pump field.It is installation of relief valve and pressure transducer on pump water inlet; Atmospheric valve arranges solenoid valve; Pressure sensor signal output terminal is connected with control unit signal input part; Control unit signal output part is connected with electromagnetic valve input end; With flexible pipe, the going out of at least two water pumps, intake pipe correspondence are connected; Its fore pump effluent pipe mouth connects through flexible pipe is corresponding with the rear class pump water inlet mouth of pipe; In water pump operation process, control unit is by the intake pressure of pressure sensor monitoring rear class pump; When rear class pump suction supply pressure is lower than pressure set points, control unit Controlling solenoid valve opens atmospheric valve, automatically tonifying Qi ftercompction is carried out to rear class pump water inlet pipe, remove its negative pressure operating mode, in order to avoid flexible pipe to be sucked the water intake of rear class pump, by said method, realize between multi-stage water pump, adopt flexible pipe to carry out the work pattern of coupled in series.What can be widely used in movable water pump manufactures and designs field.
Description
Technical field
The invention belongs to non-varactor pump field, particularly relate to a kind of pumping installations or the system that adopt multiple stage water pump series connection use.
Background technique
Water pump is conveying liquid or the machinery making fluid pressurization.It sends the mechanical energy of prime mover or other external energies to liquid, and liquid energy is increased, and is mainly used to carry liquid, also can carry liquid, gaseous mixture and the liquid containing suspended solids.
(unit is rice to a water lift of pump, refer to the energy that unit weight fluid obtains through pump) there is certain limit, lift of pump size depends on pump structure (as the size of impeller diameter, the bending situation etc. of blade), rotating speed, generally experimentally measures the pressure of pump.
In actual job, usually adopt the mode of multiple stage series connection of pumps (being also called plural serial stage) to obtain lift or the fed distance of needs.
The operating type of this plural serial stage of water pump has a definite limitation, namely the connecting pipeline between each pump must be that hard tube (rigid conduit) connects, the flow of prime water pump must be more than or equal to the flow of rear class water pump, and this provides clear stipulaties in various design discipline or handbook.
But, at present Urban Flood control meet an urgent need the row of robbing, narrow community fire-fighting water, dry season agricultural rob the temporary emergency water occasions such as filling, need use water pump carry out long distance delivery; Or, in the operation of the deep-well pumpings such as subway station, underground parking garage, mining area, need very high pump head.Owing to being subject to the restriction of single pump head, add that these operating environments cannot use hard tube to connect again between multi-stage water pump, because which form an operation blank.
Flexible pipe (flexible pipe) has and lays conveniently, is easy to store up, is convenient to the advantages such as transport, at the closely different areas of activity such as plane fire-fighting, temporary drainage, as the output pipe of water pump, apply very general.But due to the performance characteristics (can only work under positive pressure, can not work under negative pressure, otherwise can be taken out flat, lose its effect as delivery line) of flexible pipe self, the method that there is no at present is applied to the connection between multi-stage water pump.
The reason of flexible pipe can not be used between multi-stage water pump to be at present, if water pump to be together in series use by flexible pipe, when prime water pump is less than the rear stage water pump output water yield to the water yield that rear class water pump is carried, a negative pressuren zone can be formed in the water inlet of rear class water pump, under suction function, the flexible pipe connected can be sucked water pump, cause water pump to damage; And when if prime water pump is greater than the output water yield of rear class water pump to the water yield that rear class water pump is carried, prime water pump just can not carry the water of coming to export in time by rear class water pump, at this moment the flexible pipe connecting front stage water pump will be exploded, or connecting joint is broken, destroy flexible pipe series connection.
So, in existing water supply and sewage operating regulation or safety regulation for operation, be that clear stipulaties can only use hard tube to connect between multi-stage water pump.
But speedily carry out rescue work in operation process actual, what run into is the occasion that cannot hard tube be used between multi-stage water pump to connect in emergent operating environment more, such as, at burst extra torrential rain, when waterlogging is serious, if Urban Flood control wall, the unexpected partial collapse of bank against flood, discharge outside needing with water pump the ponding in cofferdam to be delivered to several kilometers, because fed distance is long, only take form that multi-stage water pump relay is carried, but due to the restriction of periphery operating environment, (residential quarter building is intensive, road is narrow, transport inconvenience etc.), a large amount of hard tubes is transported to operation field lay, be actually very unfeasible, the operation scheme being now easy to most to realize has the connection adopting flexible pipe to carry out between multi-stage water pump only.
Due to aforesaid reason, because front stage water pump conveying differential water pressures (imbalance) can cause suction pipe phenomenon and explode the phenomenon of pipe or pipe joint, cause water pump to damage, therefore under current art condition, water pump series connection cannot connect with flexible pipe.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of multiple stage water pump flexible pipe coupled in series, it is by the water feeding pressure of monitoring rear class water pump, and come accordingly automatically to regulate, control intake pipe pressure and the working state of backstage water pump, successfully achieve and adopt flexible pipe to carry out the work pattern of coupled in series between multi-stage water pump, the multi-stage water pump group that series connection is formed can apply to temporarily various by neatly, in emergent occasion, its work pattern is flexible, with with connecing, install, remove rapid and convenient, emergent draining does not have dead angle substantially, pull through the restriction of existing " connecting pipeline between each pump must be that hard tube connects ".
Technological scheme of the present invention is: a kind of method providing multiple stage water pump flexible pipe coupled in series, is characterized in that: on the intake pipe of separate unit water pump, arrange an atmospheric valve and a pressure transducer; Described atmospheric valve arranges solenoid valve, to control the ON/OFF of atmospheric valve; The signal output part of described pressure transducer, is connected with the signal input part of a control unit; The signal output part of described control unit, correspondingly with the control signal input end of solenoid valve connects; With flexible pipe, the outlet pipe of at least two described separate unit water pumps, intake pipe are corresponding in turn to and connect; Its First separate unit water pump is as fore pump, and second separate unit water pump is as rear class pump; Wherein, the effluent pipe mouth of fore pump, connects through flexible pipe is corresponding with the water inlet pipe mouth of rear class pump; Start fore pump and carry out drawing water operation, after the water exported when fore pump arrives the water intake of rear class pump, start rear class pump and carry out drawing water operation; In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring; When the intake pressure of described rear class pump is lower than the first pressure set points, described control unit exports valve opening regulated signal, and atmospheric valve opened by the solenoid valve described in control, automatically carries out tonifying Qi ftercompction to the intake pipe of rear class pump, remove its negative pressure operating mode, in order to avoid flexible pipe to be sucked the water intake of rear class pump; After the intake pressure of described rear class pump is higher than the first pressure set points, described control unit exports and closes valve regulation signal, the closed electromagnetic valve atmospheric valve described in control, recovers the normal operation circumstances of rear class pump water inlet pipe; By said method, realize between multi-stage water pump, adopt flexible pipe to carry out the work pattern of coupled in series.
Further, the signal output part of described control unit, is connected with the rotational speed regulation unit of water pump drive unit; In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring; When the intake pressure of described rear class pump is higher or lower than the second pressure set points, described control unit exports speedup or deceleration regulable control signal respectively, by the rotational speed regulation unit of described water pump drive unit, improves or reduce the rotating speed of rear class pump; To make the power running situation of the drive unit Auto-matching prime water pump of rear class pump.
Concrete, the separate unit water pump described in it is petrol pump or motor-drive pump; Described drive unit is petrol engine or motor.
Flexible pipe described in it is fire-extinguisher water hose; The design work pressure of described fire-extinguisher water hose is more than or equal to the specified delivery pressure of described separate unit pumping line.
The rated flow of rear class pump described in it, identical with the rated flow of described fore pump, or be greater than the rated flow of described fore pump.
The rotational speed regulation unit of water pump drive unit described in it is the closure of petrolic MOD controlling device or gasoline engine carburetor, or, be the frequency-variable controller of motor.
Further, the output signal of control unit described in it, is connected through the rotational speed regulation unit of delay unit with solenoid valve or water pump drive unit, to eliminate the impact of temporal pressure fluctuations on solenoid valve or rotational speed regulation unit.
The first pressure set points described in it is lower than the second pressure set points; The second described pressure set points equals the specified discharge pressure of fore pump, i.e. the specified delivery pressure of described separate unit pumping line.
Control unit described in it at least comprises A/D converting unit, sampling unit, contrast unit, delay unit, PWM unit and display unit; The analogue signal that pressure transducer exports is converted to digital signal by the A/D converting unit described in it, obtains digitized pressure signal; Sampling unit carries out periodic intervals sampling to collected pressure signal, obtains the sampled signal of pressure signal; Sampled signal and first, second pressure set points compare by described contrast unit respectively, and export corresponding close/open valve regulated signal or increasing/deceleration rotational speed regulation control signal according to comparative result; Described valve regulation signal or rotational speed regulation control signal, after delay unit time delay, are sent to the Sampling that PWM unit carries out control signal, the control impuls group of output pulse width or frequency-adjustable; Described control impuls group is transported to the rotational speed regulation unit of described solenoid valve or water pump drive unit, carries out corresponding control operation.
Multiple stage water pump flexible pipe coupled in series method described in technical solution of the present invention, between multistage packaged type/portable pump, adopt flexible pipe to carry out the work pattern of coupled in series, the multi-stage water pump group formed connecting applies in various interim, emergent occasion neatly.
Compared with the prior art, advantage of the present invention is:
1. adopt flexible pipe to be together in series each other by small pump, employing arranges blow-down pipe automatic compensation, remove the mode of operation of negative pressure, prevent from forming negative pressuren zone at the water intake of rear class water pump, avoid phenomenon flexible pipe being sucked water intake, successfully achieve and adopt flexible pipe to carry out the work pattern of coupled in series between miniature multistage water pump;
2. by the water feeding pressure of monitoring rear class water pump, and carry out the working state automatically regulating, control backstage water pump drive unit (petrol engine or motor) accordingly, make the power running situation of the drive unit Auto-matching prime water pump of rear class pump, the power matching of front stage water pump can be ensured, avoid because prime water pump can not carry the water of coming to export in time by rear class water pump, the flexible pipe connecting front stage water pump is caused to be exploded, or by the generation of the faults such as connecting joint breaks;
3. owing to using flexible pipe to connect, the water pump group that series connection is formed can be applied in various interim, emergent occasion, it uses flexibly, with with connecing, install, remove rapid and convenient, substantially do not use dead angle, breach the mode of operation that hard tube must be adopted to connect between existing water pump, for the water drainage operation of speedily carrying out rescue work under burst fortuitous event provides a kind of new operation means and pattern.
Accompanying drawing explanation
Fig. 1 is the block diagram that the present invention avoids flexible pipe to suck water intake method;
Fig. 2 is the block diagram of rear class pump Auto-matching prime water pump power operational situation method of the present invention;
Fig. 3 is present device linkage structure schematic diagram;
Fig. 4 is the module composition schematic diagram of control unit of the present invention.
In figure, 1 is fore pump, and 2 is rear class pump, and 3 is atmospheric valve, and 4 is pressure transducer, and 5 is solenoid valve, and 6 is control unit, and 7 is flexible pipe.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
In Fig. 1, technological scheme of the present invention provides a kind of method of multiple stage water pump flexible pipe coupled in series, and first it arrange an atmospheric valve and a pressure transducer on the intake pipe of separate unit water pump; Atmospheric valve arranges a solenoid valve, to control the ON/OFF of atmospheric valve; The signal input part of the signal output part of pressure transducer with a control unit is connected; The signal output part of its control unit is corresponding with the control signal input end of solenoid valve to be connected.
After the packaged type/portable pump of separate unit constructs above-mentioned hardware composition and the control mode of connection, with flexible pipe, the outlet pipe of the separate unit water pump described at least two, intake pipe are corresponding in turn to and connect, using First separate unit water pump as fore pump, using second separate unit water pump as rear class pump.
Wherein, the effluent pipe mouth of fore pump, connects through flexible pipe is corresponding with the water inlet pipe mouth of rear class pump, and the waterline completed between water pump connects.
Then, according to normal water pump operating procedure, start fore pump and carry out drawing water operation, after the water exported when fore pump arrives the water intake of rear class pump, start rear class pump and carry out drawing water operation.
In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring, when the intake pressure of described rear class pump is lower than the first pressure set points, described control unit exports valve opening regulated signal, atmospheric valve opened by solenoid valve described in control, automatically tonifying Qi ftercompction is carried out to the intake pipe of rear class pump, removes its negative pressure operating mode, in order to avoid flexible pipe to be sucked the water intake of rear class pump.
After the intake pressure of described rear class pump is higher than the first pressure set points, described control unit exports and closes valve regulation signal, the closed electromagnetic valve atmospheric valve described in control, recovers the normal operation circumstances of rear class pump water inlet pipe.
By said method, realize between multi-stage water pump, adopt flexible pipe to carry out the work pattern of coupled in series.
In Fig. 2, as further control measure, the signal output part of described control unit, is connected with the rotational speed regulation unit of water pump drive unit; In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring; When the intake pressure of described rear class pump is higher or lower than the second pressure set points, described control unit exports speedup or deceleration regulable control signal respectively, by the rotational speed regulation unit of described water pump drive unit, improves or reduce the rotating speed of rear class pump; To make the power running situation of the drive unit Auto-matching prime water pump of rear class pump.
In the technical program, described separate unit water pump is portable/portable petrol pump or motor-drive pump; Described drive unit is petrol engine or motor.
Flexible pipe described in it is fire-extinguisher water hose; The design work pressure of described fire-extinguisher water hose is more than or equal to the specified delivery pressure of described separate unit pumping line.
The rated flow of rear class pump described in it, identical with the rated flow of described fore pump, or be greater than the rated flow of described fore pump.
The rotational speed regulation unit of water pump drive unit described in it is the closure of petrolic MOD controlling device or gasoline engine carburetor, or, be the frequency-variable controller of motor.
Fire-extinguisher water hose (being also called fire hose) is used to the flexible pipe transporting the anti-flaming liquid such as high pressure water or foam.Traditional fire-extinguisher water hose take rubber as liner, and outer surface is wrapped in flax braided fabric.Advanced fire-extinguisher water hose is then made with polymeric materials such as polyurethane.There is metal joint at two of fire-extinguisher water hose, can connect another root water-band to extend distance or to connect nozzle to increase Liquid inject pressure.
Because fire-extinguisher water hose has become the standing goods and materials of urban fire protection, its storage level is large, is easy to transport, with special-purpose metal joint, connects very convenient between two flexible pipes, therefore select fire-extinguisher water hose as connecting hose in the technical program.
Common gasoline engine water pump is a kind of centrifugal pump, belongs to self-priming pump class, is used for the industries such as forestry, fishery, herding, aquaculture, agricultural as irrigation and drainage, sprinkling irrigation pump, also often by as fire extinguishing pump.
Gasoline engine water pump is made up of petrol engine, water pump and support, and have the advantages such as cost is low, lightweight, easy to maintenance, purposes is extremely wide.Removable, portable, be a large feature of gasoline engine water pump.
In Fig. 3, give the technical program to existing portable/portable petrol pump or the improvement of motor-drive pump on pipeline structure and control program.
As shown in the figure, the back with water inlet line of rear class pump 2 is arranged an atmospheric valve 3 and a pressure transducer 4; Atmospheric valve arranges a solenoid valve 5, to control the ON/OFF of atmospheric valve; The signal input part of the signal output part of pressure transducer with a control unit 6 is connected; The signal output part of its control unit is corresponding with the control signal input end of solenoid valve to be connected.
The effluent pipe mouth of its fore pump 1, connects through flexible pipe 7 is corresponding with the water inlet pipe mouth of rear class pump, and the waterline completed between water pump connects.
In prior art, atmospheric valve is normally arranged on the outlet pipe of water pump, for by the water emptying in outlet pipe.And in the technical program, atmospheric valve is arranged on the water inlet pipe mouth of rear class pump, be used for automatically carrying out tonifying Qi ftercompction to the intake pipe of rear class pump, remove its negative pressure operating mode, in order to avoid flexible pipe is sucked the water intake of rear class pump.
In Fig. 4, the control unit described in the technical program at least comprises A/D converting unit, sampling unit, contrast unit, delay unit, PWM unit and display unit; The analogue signal that pressure transducer exports is converted to digital signal by the A/D converting unit described in it, obtains digitized pressure signal; Sampling unit carries out periodic intervals sampling to collected pressure signal, obtains the sampled signal of pressure signal; Sampled signal and first, second pressure set points compare by described contrast unit respectively, and export corresponding close/open valve regulated signal or increasing/deceleration rotational speed regulation control signal according to comparative result; Described valve regulation signal or rotational speed regulation control signal, after delay unit time delay, are sent to the Sampling that PWM unit carries out control signal, the control impuls group of output pulse width or frequency-adjustable; Described control impuls group is transported to the rotational speed regulation unit of described solenoid valve or water pump drive unit, carries out corresponding control operation.
The rotational speed regulation unit of water pump drive unit described in it is the MOD controlling device of petrol engine or the frequency-variable controller of motor.
Further, the output signal of control unit described in it, is connected through the rotational speed regulation unit of delay unit with solenoid valve or water pump drive unit, to eliminate the impact of temporal pressure fluctuations on solenoid valve or rotational speed regulation unit.
On optimum configurations, the first pressure set points described in it is lower than the second pressure set points; The second described pressure set points equals the specified discharge pressure of fore pump, i.e. the specified delivery pressure of described separate unit pumping line.
Owing to adopting existing single chip circuit, be easy to the function that can realize above-mentioned functions module, therefore its concrete line construction and annexation no longer describe at this, those skilled in the art can produce the product descritption of business men or correlation technique data to obtain relevant technical information and specific implementation with reference to single-chip microcomputer.
Pulse duration modulation (PWM), it is the abbreviation of English " PulseWidthModulation ", be called for short pulsewidth modulation, be utilize the numeral of microprocessor to export the very effective technology of one controlled analog circut, be widely used in and control with many fields of conversion from measurement, the power that communicates.
The core of the technical program is the problem of solution two aspects, one is water pump to be together in series use by flexible pipe, when prime water pump is less than the rear class water pump output water yield to the water yield that rear class water pump is carried, a negative pressuren zone can be formed in the water inlet of rear class water pump, under suction function, the flexible pipe connected is sucked water pump, cause water pump to damage.Two is power matchings of front stage water pump, prime water pump is greater than the output water yield of rear class water pump to the water yield that rear class water pump is carried, prime water pump just can not carry the water of coming to export in time by rear class water pump, at this moment the flexible pipe connecting front stage water pump will be exploded, or connecting joint is broken, destroy flexible pipe series connection.
The water yield for the conveying of prime water pump is less than the water yield that rear class water pump exports, and causes the problem of rear class water feeding of water pump interruption-forming negative pressuren zone, and the technical program adopts blow-down pipe ftercompction, removes negative pressure, in order to avoid flexible pipe to be sucked the phenomenon of water intake.
During experiment, use the petrol pump of two HONDAGX390, 4 cun of conventional fire hose are utilized to be connected into water pump group, (GX390 parameters of pump: pump shaft rotating speed 3750r/min, lift 34 meters, flow 120T/H) drop to 3T/H from 100T/H when prime pump capacity, intake pipe pressure is-0.15kpa, 4 cun of fire hose are inhaled into intake pipe, after opening automatic air release valve, when same prime pump capacity drops to 3T/H from 100T/H, rear class water feeding of water pump pipe pressure is 0kpa, fire hose is not inhaled into intake pipe, because atmospheric valve is auto state, be equilibrated at 0 pressure and barotropic state, effectively prevent the cavitation erosion of water pump.
For the Dynamic Matching of front stage water pump, select the close water pump of power to join as far as possible and connect.And on rear class water pump, increase automatic power adjust system, the power of Auto-matching prime water pump.
In experiment, still the petrol pump of above-mentioned two HONDAGX390 is used to test, at the intake pipe place setting pressure sensor of rear class water pump, by the closure (MOD be namely commonly called as) of Single-chip Controlling gasoline engine carburetor, the rotating speed of adjustment rear class water pump is to mate the power of prime water pump.(when testing electric pump, use a Grandfos water pump DW100.66A to connect as rear class water pump, carry out adjusting the coupling that rotating speed completes front stage power to electric pump by variable-frequency governor).
By experiment respectively to petrol pump, electric pump with the cross-matched of petrol pump and electric pump, connect to form water pump group with flexible pipe, effectively increase fed distance and improve lift, obtaining ideal effect, confirm the effective and feasible of the technical program flexible pipe attached method.
The technical program adopts flexible pipe to connect the method for (series connection) by being used between multiple stage water pump, small pump can be made to be together in series with flexible pipe each other, therefore the restriction of pump head overcome by serial fashion, separate unit water lift of pump is amplified to infinity by the water pump group of formation of being connected in theory, more owing to using flexible pipe to connect, the water pump group that series connection is formed can be applied in various interim, emergent occasion.Use flexibly, with connecing, install, remove rapid and convenient, substantially do not have dead angle, this is that existing hard tube attached method cannot be accomplished.
Because the present invention is by the water feeding pressure of monitoring rear class water pump, and come the intake pipe pressure and the working state that automatically regulate, control backstage water pump accordingly, successfully achieve and adopt flexible pipe to carry out the work pattern of coupled in series between multi-stage water pump, the multi-stage water pump group that series connection is formed can apply in various interim, emergent occasion by neatly, be specially adapted to the interim Emergency use environment of water pump, or the occasion of hard tube cannot be laid.
The present invention can be widely used in the design of packaged type/portable pump, manufacture and water drainage and to speedily carry out rescue work field of operation.
Claims (11)
1. a method for multiple stage water pump flexible pipe coupled in series, is characterized in that:
The intake pipe of separate unit water pump arranges an atmospheric valve and a pressure transducer;
Described atmospheric valve arranges solenoid valve, to control the ON/OFF of atmospheric valve;
The signal output part of described pressure transducer, is connected with the signal input part of a control unit;
The signal output part of described control unit, correspondingly with the control signal input end of solenoid valve connects;
With flexible pipe, the outlet pipe of at least two described separate unit water pumps, intake pipe are corresponding in turn to and connect;
Its First separate unit water pump is as fore pump, and second separate unit water pump is as rear class pump;
Wherein, the effluent pipe mouth of fore pump, connects through flexible pipe is corresponding with the water inlet pipe mouth of rear class pump;
Start fore pump and carry out drawing water operation, after the water exported when fore pump arrives the water intake of rear class pump, start rear class pump and carry out drawing water operation;
In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring;
When the intake pressure of described rear class pump is lower than the first pressure set points, described control unit exports valve opening regulated signal, and atmospheric valve opened by the solenoid valve described in control, automatically carries out tonifying Qi ftercompction to the intake pipe of rear class pump, remove its negative pressure operating mode, in order to avoid flexible pipe to be sucked the water intake of rear class pump;
After the intake pressure of described rear class pump is higher than the first pressure set points, described control unit exports and closes valve regulation signal, the closed electromagnetic valve atmospheric valve described in control, recovers the normal operation circumstances of rear class pump water inlet pipe;
By said method, realize between multi-stage water pump, adopt flexible pipe to carry out the work pattern of coupled in series.
2., according to the method for multiple stage water pump flexible pipe coupled in series according to claim 1, it is characterized in that the signal output part of described control unit, be connected with the rotational speed regulation unit of water pump drive unit; In the running of water pump, described control unit is by the intake pressure of rear class pump described in pressure sensor monitoring;
When the intake pressure of described rear class pump is higher or lower than the second pressure set points, described control unit exports speedup or deceleration regulable control signal respectively, by the rotational speed regulation unit of described water pump drive unit, improves or reduce the rotating speed of rear class pump; To make the power running situation of the drive unit Auto-matching prime water pump of rear class pump.
3., according to the method for multiple stage water pump flexible pipe coupled in series according to claim 1, it is characterized in that described separate unit water pump is petrol pump or motor-drive pump.
4., according to the method for multiple stage water pump flexible pipe coupled in series according to claim 2, it is characterized in that described drive unit is petrol engine or motor.
5., according to the method for multiple stage water pump flexible pipe coupled in series according to claim 1, it is characterized in that described flexible pipe is fire-extinguisher water hose; The design work pressure of described fire-extinguisher water hose is more than or equal to the specified delivery pressure of described separate unit pumping line.
6., according to the method for multiple stage water pump flexible pipe coupled in series according to claim 1, it is characterized in that the rated flow of described rear class pump, identical with the rated flow of described fore pump, or be greater than the rated flow of described fore pump.
7. according to the method for multiple stage water pump flexible pipe coupled in series according to claim 2, it is characterized in that the rotational speed regulation unit of described water pump drive unit is the closure of petrolic MOD controlling device or gasoline engine carburetor, or, be the frequency-variable controller of motor.
8. according to the method for the multiple stage water pump flexible pipe coupled in series described in claim 1 or 2, it is characterized in that the output signal of described control unit, be connected through the rotational speed regulation unit of delay unit with solenoid valve or water pump drive unit, to eliminate the impact of temporal pressure fluctuations on solenoid valve or rotational speed regulation unit.
9., according to the method for the multiple stage water pump flexible pipe coupled in series described in claim 1 or 2, it is characterized in that the first described pressure set points is lower than the second pressure set points; The second described pressure set points equals the specified discharge pressure of fore pump, i.e. the specified delivery pressure of described separate unit pumping line.
10. according to the method for the multiple stage water pump flexible pipe coupled in series described in claim 1 or 2, it is characterized in that described control unit at least comprises A/D converting unit, sampling unit, contrast unit, delay unit, PWM unit and display unit;
The analogue signal that pressure transducer exports is converted to digital signal by the A/D converting unit described in it, obtains digitized pressure signal;
Sampling unit carries out periodic intervals sampling to collected pressure signal, obtains the sampled signal of pressure signal;
Sampled signal and first, second pressure set points compare by described contrast unit respectively, and export corresponding close/open valve regulated signal or increasing/deceleration rotational speed regulation control signal according to comparative result;
Described valve regulation signal or rotational speed regulation control signal, after delay unit time delay, are sent to the Sampling that PWM unit carries out control signal, the control impuls group of output pulse width or frequency-adjustable;
Described control impuls group is transported to the rotational speed regulation unit of described solenoid valve or water pump drive unit, carries out corresponding control operation.
11. according to the method for multiple stage water pump flexible pipe coupled in series according to claim 1, it is characterized in that described multiple stage water pump flexible pipe coupled in series method, between multistage packaged type/portable pump, adopt flexible pipe to carry out the work pattern of coupled in series, the multi-stage water pump group formed connecting applies in various interim, emergent occasion neatly.
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| CN201310729396.9A CN103758764B (en) | 2013-12-26 | 2013-12-26 | A kind of method of multiple stage water pump flexible pipe coupled in series |
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| CN107503957B (en) * | 2017-07-04 | 2019-04-09 | 江门市天澜清洗设备有限公司 | More pump level controlling systems and its control method applied to cleaning machine |
| CN107989786B (en) * | 2017-11-25 | 2019-07-05 | 蚌埠市鑫源机电设备有限公司 | A kind of pump operation regulator control system of subregion detection |
| CN110173433B (en) * | 2019-04-30 | 2020-08-28 | 江苏大学 | Anti-blocking device and control method and sewage pump |
| CN112538895B (en) * | 2020-12-23 | 2024-11-05 | 郭晓东 | A dredging system |
| CN118066122B (en) * | 2024-04-19 | 2024-06-21 | 杭州新亚低温科技有限公司 | Improved generation high-lift cryogenic pump cavitation prevention impeller and performance verification device |
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| CN2232996Y (en) * | 1994-08-12 | 1996-08-14 | 张家港市工业锅炉给水泵厂 | Boiler water supply pump group having small flow, high delivery lift and energy saving functions |
| US6059537A (en) * | 1997-11-13 | 2000-05-09 | Sundstrand Corporation | Aircraft fuel pump with centrifugal pump and regenerative pump stages |
| CN2546661Y (en) * | 2002-05-18 | 2003-04-23 | 刘景波 | Servomotor deep suction sprinkling pump |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232996Y (en) * | 1994-08-12 | 1996-08-14 | 张家港市工业锅炉给水泵厂 | Boiler water supply pump group having small flow, high delivery lift and energy saving functions |
| US6059537A (en) * | 1997-11-13 | 2000-05-09 | Sundstrand Corporation | Aircraft fuel pump with centrifugal pump and regenerative pump stages |
| CN2546661Y (en) * | 2002-05-18 | 2003-04-23 | 刘景波 | Servomotor deep suction sprinkling pump |
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