CN1017824B - Pumping plant - Google Patents
Pumping plantInfo
- Publication number
- CN1017824B CN1017824B CN90108367A CN90108367A CN1017824B CN 1017824 B CN1017824 B CN 1017824B CN 90108367 A CN90108367 A CN 90108367A CN 90108367 A CN90108367 A CN 90108367A CN 1017824 B CN1017824 B CN 1017824B
- Authority
- CN
- China
- Prior art keywords
- pressure
- pump
- force value
- head
- pressure transducer
- 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.)
- Expired
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
To eliminate wasteful energy by providing a sensor for detecting pressure in a pump device approximately linearly, an external terminal for inputting suction height, and an operation controller for determining automatically pushing up height according to the suction height. When the suction height with a pump device substantially installed is Hs1, pump running start pressure Hon1 is set in a range of no- discharge operation pressure 'Htmax - Hs1', that is, discharge pressure Hd1 under a no-discharge condition automatically by setting an external terminal inside a control box 12 to Hsi so that pump operation stop pressure Hoff1 is set to a higher value than Hon1. When the suction height is set to Hs2 which is smaller by H, it is considered that a pump position is shifted to Hs2, and Hon2 and Hoff2 become the values which are higher than Hon1 and Hoff1 by H. By switching the external terminal, the suction height according to an actual condition is inputted, and by setting the pushing up height automatically, pump performance can be exhibited sufficiently.
Description
The present invention relates to a kind of at least at a valve open with when closed, the pumping plant that pump is started automatically and stop and making the pump group of some parallel runnings start and discharge automatically.Relate in particular to a kind of flow of effectively using pump and the pumping plant of the characteristic between the lift.
Traditional pressure switch that comprises, perhaps, the pumping plant of pressure switch and flow switch is used for making pump startup and stops.Poor according to the interior pressure of pumping plant and pressure switch spring predetermined pressure, its contact of pressure switch open and close, and make pump startup and stop.Because pressure switch is a mechanical structure, do the difference of opening pressure and clossing pressure of pressure switch to such an extent that be difficult for a short time.Predetermined pressure because of pressure switch is determined by its spring force again, so, in the pressure regulation range of pressure switch is limited in to a certain degree.And the discharge head from the pump center to the highest point valve is slightly less than the clossing pressure of pressure switch.That is, when the clossing pressure of the valve actual hydraulic pressure of highest point or pressure switch was not more than water-head from the pump center to the highest point valve, even valve open, water can not sent from the highest point valve yet.
When traditional pumping plant with maximum gross head Htmax is placed on from pump inhale device to the height of the water surface be suction head (suction head) for Hs local time, as shown in Figure 2, the pressure switch of pumping plant is H at hydraulic pressure
ONIn time, open, and hydraulic pressure is H
OFFThe time closure.H
ONAnd H
OFFBetween one section be the scope that water can be transferred, it discharges head is H
ON
When same pumping plant be placed on suction head be Hs ' local time, the scope that water can be transferred and discharge head and still remain unchanged.Therefore, in this case, lost the energy of lift between Hs and the Hs '.
Traditional pumping plant that a kind of form with pressure is measured the pumping plant flow for example is disclosed in disclosed Japanese Patent Laid-Open Publication No.59-720 on January 7th, 1984, is entitled as among the Fig. 1 of " control gear of pressure box feedback wetting system ".
Because the clossing pressure of the hydraulic pressure that the discharge head of traditional pumping plant is opened corresponding to pressure switch is fixed, also be so even suction head changes, so the discharge head of pump can not effectively utilize.
The object of the present invention is to provide a kind of pumping plant, when having permanent pumping plant of discharging head when being placed to different other position of suction head, it can automatically change the discharge head, effectively utilize the discharge head of pump, the energy loss of pump is reduced, and more general, and need not resemble working pressure switch traditional pumping plant.
For realizing this purpose, pumping plant of the present invention has used a pressure transducer and that detects the pressure of the outlet pipe that is connected with pump to discharge the suction head decision start-up operation pressure of head and actual measurement and the control gear of shut-down operation pressure according to the detected maximum of pressure transducer automatically.
According to the present invention, when having permanent pumping plant of discharging head when being placed to different other positions of suction head, because pumping plant of the present invention can determine start-up operation pressure and shut-down operation pressure automatically according to the suction head of total potential difference of big flood and actual measurement, can automatically change and discharge head and need not use pressure switch in traditional pumping plant.
Fig. 1 illustrates a kind of application pumping plant of the present invention;
Fig. 2 shows the flow of traditional pumping plant and the performance plot between the hydraulic pressure;
Fig. 3 shows the block diagram of one embodiment of the present of invention;
The performance plot that Fig. 4 shows the present invention when using a pump between flow and the hydraulic pressure;
The performance plot that Fig. 5 shows the present invention when using two pumps between flow and the hydraulic pressure;
Fig. 6 shows the flow chart that drives a pump among the present invention automatically;
Fig. 7 shows the flow chart of a pump of manual drives among the present invention;
Fig. 8 shows the flow chart of two pumps of automatic or manual driving among the present invention;
Referring to Fig. 1, two pumps 2 and 3 are installed on the same base 1 of pumping plant among the figure.Each pump 2,3 is connected on the water tank 6 by suction sleeve 4,5 respectively.Pump group 2 and 3 water outlet are connected on the valve 9 by collecting pipe 7 and outlet pipe 8.On collecting pipe 7, pressure transducer 10 and forbay 11 are housed.On same base 1, control box 12 is housed.
Referring to Fig. 3, the terminal 15 that connects power supply 13 and motor 14 is housed in control box, disconnect and the switch 16 of the circuit of closed motor 14 and according to the microprocessor 17 of some the input signal control switchs 16 that after this will speak of.Microprocessor 17 detects the current transformer 18 and manual outside terminal 19 input signals of setting suction head of the electric current that flows through motor 14 from detecting the pressure transducer 10 of the pressure in the water pipe 8.The tutorial light 20 that microprocessor 17 outputs to signal indication motor 14 excess current and 2,3 no-load runnings of pump group with (below will narrate) switch 16 of controlling the motor 14 that is connected with the pump group according to the present invention.
Referring to Fig. 4 and Fig. 6, after the 21st step started, microprocessor 17 made pumping plant work, but does not discharge water from valve 9 in instruction of 22 steps output.Come the input signal of microprocessor 17 from pressure transducer 10, the pressure Htmax that does not promptly have drain operation is read into the storage (not shown) in the 23rd step.At the 24th step, pump 2 or 3 shut-down operation pressure Hd
2Hd-x calculates by formula; Start-up operation pressure Hd
1By formula Hd
2-y calculates.Wherein, x is and Htmax-Hd
2Corresponding fractional value, y is and Hd
2-Hd
1Another corresponding fractional value, as shown in Figure 4.The actual suction head of supposing pumping plant i.e. as shown in Figure 4 pump center 1 is H
S1; Final suction head is that pump center 2 shown in Figure 4 is H
S2Because Htmax is fixed value, and is described, Hd
1And Hd
2Can be by microprocessor 17 according to actual suction head H
S1With final suction head H
S2Output calculate and get.X and y respectively with H
S2And H
S1-H
S2Corresponding.Valve 9 was opened in the 25th step.The discharge pressure of supposing pump is H.Whether differentiate H≤Hd in the 26th step
1As H≤Hd
1The time, entered for the 27th step.As the 26th step H≤Hd
1Be false, whether differentiate H≤Hd again
1In the 27th step, pump is started working.In the 28th step, whether differentiate H 〉=Hd
2Differentiating when the 28th step is more than or equal to Hd
2The time.Flow process entered for the 29th step.The 28th step was carried out the differentiation in the 28th step when differentiating for "No" again.After the 29th step, pump quit work, flow process resetted in the 30th step.According to the system that Fig. 6 disclosed, start-up operation pressure Hd
1Be automatically set at Htmax to Hs
1Scope in, shut-down operation pressure Hd
2Be automatically made greater than Hd
1
Referring to Fig. 7, after the 21st step system start-up, the pumping plant of Fig. 1 reads by observation in the 31st step to the suction head Hs of water tank 6.In the 32nd step, observable suction head Hs is set on as shown in Figure 3 the outside terminal 19.Calculate shut-down operation pressure Hd in the 34th step by microprocessor 17
2With start-up operation pressure Hd
1The 25th went on foot for the 30th step with shown in Figure 6 identical.According to system shown in Figure 7, the actual suction head Hs when externally terminal 19 is set to the pumping plant assembling
1The time, start-up operation pressure is automatically set at Htmax to Hs
1In the scope, shut-down operation pressure is automatically set at greater than Hd
1A value.
Referring to Fig. 5 and Fig. 8.Automatic operation the 21st among Fig. 8 go on foot the 23rd the step with Fig. 6 in identical.Suppose H
POFF1Be the shut-down operation pressure of pump under two parallel connection of pumps runnabilitys, H
OFF1Be the shut-down operation pressure of pump under the single pump operation situation, H
ON1Be the start-up operation pressure under the single pump operation situation, H
PON1The start-up operation pressure of pump when being two parallel connection of pumps operations, and x＞x1, y＞y1.Carry out the calculating shown in the 35th step by microprocessor 17.Can allow H
OFF1=H
POFF1, H
ON1=H
PON1When at the 25th step valve 9 when opening, whether the 36th step differentiated H≤H
PON1When the 36th step was differentiated for "Yes", flow process entered the 37th step pump operation.When the differentiation in the 36th step is "No", repeat the differentiation in the 36th step.Whether differentiate H≤H in the 38th step
PON1When the 38th step was differentiated for "Yes", in the two parallels connection of pumps operation of the 39th step.When the differentiation in the 38th step is "No", carry out the differentiation in the 42nd step.When the differentiation in the 40th step is "Yes", close a pump.When the differentiation in the 40th step when being "No", whether repeat to differentiate H 〉=H
POFF1When the differentiation in the 42nd step is "Yes", close two pumps.
When manually driving two pumps, the 22nd among Fig. 8 and 23 steps were replaced by the step of the 33rd among Fig. 7.
When pump is set at H
S2, suction head and Fig. 5 and embodiment illustrated in fig. 8 in H
S1Compare little H, think that the center of pump moves on to H
S2So, H
ON2, H
OFF2, H
PON2And H
POFF2Respectively than H
ON1, H
OFF1, H
PON1And H
POFF1High H.
As mentioned above, with the corresponding H of actual suction head
S1Or H
S2Be input to microprocessor 17 from outside terminal 19.Determine start-up operation pressure H respectively
ON1Or H
ON2, shut-down operation pressure H
OFF1Or H
OFF2, parallel running breakout pressure H
PON1Or H
PON2And parallel running release pressure H
POFF1Or H
POFF2When since valve 9 open cause pump water pressure reduce and discharge pressure reaches H
ON1Or H
ON2The time, each pump is started working.When causing that discharge pressure rises and this pressure reaches H because valve 9 is closed
OFF1Or H
OFF2The time, each pump quits work automatically.Because from valve 9 drainings, this pressure is less than H after a pump is started working
ON1Or H
ON2H
PON1Or
PON2The time, microprocessor 17 outputs one make the instruction of pump sets in parallel operation, drive two pumps 2 and 3.
According to the foregoing description, by conversion outside terminal 19 actual suction head is input to microprocessor 17, corresponding to this suction head automatic setting suction head, so just can effectively utilize the discharge head of pump, the loss of the energy of restriction pumping plant.
In Fig. 5 and system shown in Figure 7,,, be input to microprocessor by value Hs, automatic setting Hd suction head even also have suction head to change except the effect of the system shown in Fig. 4 Fig. 5 and Fig. 6
1＞H
OFF1＞H
POFF1＞H
ON1＞H
PON1Perhaps Hd
2＞H
OFF2＞H
POFF2＞H
ON2＞H
PON2Relation, H
OFF1And H
ON1Value still can maintain constant.
According to the present invention, when the pump head with permanent discharge head was placed on the position of suction head change, the discharge head of pump can change automatically, can effectively utilize the discharge head of pump, energy loss is reduced, and pumping plant is more general.
Claims (6)
1, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump, and this pressure is corresponding to the opening and closing of valve; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detects the described pressure in the described pipe,
It is characterized in that,
Control gear is discharged head (Hd), the first suction head (Hs according to the maximum that is detected by described pressure transducer respectively
1) and maximum head, the second suction head (Hs of discharging
2) calculate the start-up operation pressure (Hd of described pump
1) and shut-down operation pressure (Hd
2), when described pressure (H) is less than or equal to start-up operation pressure (Hd
1) time, start described pump, when described pressure more than or equal to shut-down operation pressure (Hd
2) time close described pump.
2, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump, and this pressure is corresponding to the opening and closing of valve; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detects the described pressure in the described pipe;
It is characterized in that
Control gear is stored the detected maximum head (Hd) of discharging of described pressure transducer, calculates the described pump second force value (Hd according to the discharge head (Hd) of actual measurement and the suction head (Hs) of actual measurement
1) and the first force value (Hd
2), when described pressure (H) is less than the maximum first force value (Hd that discharges head
2) time export a no-operation instruction to described pump, when described pressure (H) is less than the first force value (Hd
2) the second force value (Hd
1) time exports a start-up operation and instruct described pump.
3, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump, and this pressure is corresponding to the opening and closing of valve; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detects the described pressure in the described pipe;
It is characterized in that
Control gear has the outside terminal 19 that is used for manually importing suction head (Hs), and store the detected maximum head (Hd) of discharging of described pressure transducer, according to the discharge head (Hd) and the described pump second force value (Hd of suction head (Hs) calculating of actual measurement
1) and the first force value (Hd
2), when described pressure is less than the maximum first force value (Hd that discharges the difference of head (Hd) and suction head (Hs)
2) time output no-operation instruction, when described pressure (H) is less than the first force value (Hd
2) the second force value (Hd
1) time output start-up operation instructs described pump.
4, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump, and this pressure is corresponding to the opening and closing of valve; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detects the described pressure in the described pipe,
It is characterized in that,
Control gear calculates start-up operation pressure (H according to the detected maximum suction head (Hs) of discharging head (Hd) and actual measurement of described pressure transducer at described pump when taking turns or starting simultaneously and stop
ON1; H
PON1) and shut-down operation pressure (H
OFF1, H
POFF1).
5, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump, and this pressure is corresponding to the opening and closing of valve; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detects the described pressure in the described pipe,
It is characterized in that:
Control gear is stored the detected maximum head (Hd) of discharging of described pressure transducer, according to the discharge head (Hd) and the described first force value (H of suction head (Hs) calculating pump of actual measurement
OFF1), the second force value (H
POFF1), the 3rd force value (H
ON1) and the 4th pressure value (H
PON1), when described pressure (H) is less than the maximum first force value (H that discharges head
OFF1) time output halt instruction is to described pump, when described pressure (H) is less than the first force value (H
OFF1) the second force value (H of parallel running of the described pump of release
POFF1) time, export another no-operation instruction to described pump, be less than the 3rd force value (H of second force value when described pressure (H)
ON1) time, the output start-up operation instructs pump to open a pump, is less than the 4th force value (H of the 3rd force value when described pressure (H)
PON1The time, export another start-up operation instruction described pump is moved simultaneously.
6, a kind of pumping plant comprises a pressure transducer 10, is used to detect the pressure whether the outlet pipe 8 interior pressure H that are connected with the pump 2 or 3 of parallel running reach predetermined startup and close pump head, and this pressure is corresponding to the opening and closing of dragon; With a control gear 17, be used for making described pump startup and stopping according to described force value,
Pressure transducer approximately linear ground detect in the described pipe described pressure and
It is characterized in that,
Control gear has a manually outside terminal 19 of input suction head (Hs), and storage is by the detected maximum head (Hd) of discharging of described pressure transducer, according to the discharge head (Hd) and the described pump first force value (H of suction head (Hs) calculating of actual measurement
OFF1), the second force value (H
POFF1), the 3rd force value (H
ON1) and the 4th force value (H
PON1), when described pressure (H) is less than the maximum first force value (H that discharges head
OFF1) time output no-operation instruction is to described pump, when described pressure (H) is less than the first force value (H
OFF1) the second force value (H of release parallel connection of pumps operation
POFF1) time, export another no-operation instruction to described pump, when described pressure (H) was less than the 3rd force value of second force value, the output start-up operation instructed described pump to start a pump, is less than the 4th force value (H of the 3rd force value when described pressure (H)
PON1) time, export another start-up operation instruction so that described pump starts simultaneously.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP89-269445 | 1989-10-17 | ||
| JP269445/89 | 1989-10-17 | ||
| JP1269445A JP3003939B2 (en) | 1989-10-17 | 1989-10-17 | Pump device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051231A CN1051231A (en) | 1991-05-08 |
| CN1017824B true CN1017824B (en) | 1992-08-12 |
Family
ID=17472535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90108367A Expired CN1017824B (en) | 1989-10-17 | 1990-10-11 | Pumping plant |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3003939B2 (en) |
| KR (1) | KR910008285A (en) |
| CN (1) | CN1017824B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533769B (en) * | 2014-11-17 | 2016-05-11 | 江苏环力科技发展有限公司 | Water pump pressure controller Auto-Test System |
| CN104846896A (en) * | 2014-12-12 | 2015-08-19 | 重庆摩尔水处理设备有限公司 | Full-automatic control system for industrial pure water delivery |
| KR102206978B1 (en) * | 2016-11-29 | 2021-01-22 | 에스지 디제이아이 테크놀러지 코., 엘티디 | Agricultural unmanned aerial vehicle liquid injection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556469U (en) * | 1978-06-30 | 1980-01-17 | ||
| JPS59174608U (en) * | 1983-05-04 | 1984-11-21 | 株式会社荏原製作所 | automatic water supply device |
| JPS6087394U (en) * | 1983-11-18 | 1985-06-15 | 三洋電機株式会社 | automatic pump |
| JPS60175896U (en) * | 1984-04-28 | 1985-11-21 | 株式会社 川本製作所 | Self-driving pump equipment |
-
1989
- 1989-10-17 JP JP1269445A patent/JP3003939B2/en not_active Expired - Fee Related
-
1990
- 1990-10-11 CN CN90108367A patent/CN1017824B/en not_active Expired
- 1990-10-16 KR KR1019900016408A patent/KR910008285A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051231A (en) | 1991-05-08 |
| JPH03134294A (en) | 1991-06-07 |
| KR910008285A (en) | 1991-05-31 |
| JP3003939B2 (en) | 2000-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |