CN106401944A - Blocking-prevention screw pump and method for preventing screw pump blocking - Google Patents
Blocking-prevention screw pump and method for preventing screw pump blocking Download PDFInfo
- Publication number
- CN106401944A CN106401944A CN201610953085.4A CN201610953085A CN106401944A CN 106401944 A CN106401944 A CN 106401944A CN 201610953085 A CN201610953085 A CN 201610953085A CN 106401944 A CN106401944 A CN 106401944A
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- China
- Prior art keywords
- screw pump
- valve
- timer
- frequency
- full pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2280/00—Arrangements for preventing or removing deposits or corrosion
- F04C2280/02—Preventing solid deposits in pumps, e.g. in vacuum pumps with chemical vapour deposition [CVD] processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a blocking-prevention screw pump and a method for preventing screw pump blocking. The blocking-prevention screw pump comprises a flow detection switch and a feeding valve. The flow detection switch is arranged at a discharging outlet of the screw pump; the feeding valve is arranged at a feeding pipe of the screw pump; the flow detection switch is used for detecting whether materials in the screw pump reach the full package status or not; and the opening of the feeding valve is decreased under the condition that the materials, detected by the flow detection switch, in the screw pump reach the full package status. According to the blocking-prevention screw pump and the method for preventing screw pump blocking, by adoption of the modified screw pump, a pipeline cannot be blocked when the materials of the low water content and the high fiber content are pumped, and therefore the screw pump can be prevented from being blocked.
Description
Technical field
The present invention relates to screw pump field, prevent the screw pump of putty and prevent screw pump putty particularly to a kind of
Method.
Background technology
During existing screw rod pump work, material is put into the sealing space that screw thread is enclosed with pump case after being inhaled into, when actively
During screw rod rotation, screw pump sealed volume improves screw rod pump pressure under the extruding of thread, and is axially moveable, because screw rod is
Constant speed rotation, so the flow pumping out material is also uniform.
But there are the following problems for existing screw pump：When the material moisture of common screw pump pumping is low, material fiber
When easily luming, once the hardened heap of material blocks up will result in pipeline blockage, seriously lead to booster.
Content of the invention
In view of above technical problem, the invention provides a kind of prevent the screw pump of putty and prevent screw pump putty
Method is not so that when screw pump pumps easily stifled material, result in line clogging yet.
According to an aspect of the present invention, provide a kind of screw pump preventing putty, including flow measuring valve and charging
Valve, wherein：
Flow measuring valve is arranged on the discharge outlet of screw pump, and material inlet valve is arranged at the feed pipe of screw pump；
Flow measuring valve, for detecting in screw pump, whether material reaches full pipe condition；
Material inlet valve, for detecting in the case that in screw pump, material reaches full pipe condition in flow measuring valve, subtracts
Minor valve aperture.
In one embodiment of the invention, material inlet valve is additionally operable to material in screw pump is detected in flow measuring valve
In the case that full pipe condition is switched to non-full pipe state, valve opening is reverted to setting aperture.
In one embodiment of the invention, described screw pump also includes screw pump motor, wherein：
Screw pump motor, for detecting in the case that in screw pump, material reaches full pipe condition in flow measuring valve,
Lifting motor frequency；And material in screw pump is detected in flow measuring valve and be switched to non-full pipe state from full pipe condition
In the case of, electric machine frequency is reduced to setpoint frequency.
In one embodiment of the invention, described screw pump also includes the first timer, wherein：
First timer, for detecting in the case that in screw pump, material reaches full pipe condition in flow measuring valve,
Start timing；
In the case that material inlet valve is used for reaching for first scheduled time in the first timer, reduce valve opening；
In the case that screw pump motor is used for reaching for first scheduled time in the first timer, lifting motor frequency.
In one embodiment of the invention, material inlet valve is used for reaching for first scheduled time in the first timer
In the case of, with the first predetermined amplitude, valve opening is gradually decreased to completely close from setting aperture；Screw pump motor is used for
In the case of reaching for first scheduled time during the first timer, with the second predetermined amplitude by electric machine frequency from setpoint frequency gradually
Rise to rated frequency.
In one embodiment of the invention, material inlet valve is used for reaching for first scheduled time in the first timer
In the case of, by valve opening from the beginning of setting aperture, gradually decrease to close completely with the first predetermined amplitude and the predetermined interval that reduces
Close；In the case that screw pump motor is used for reaching for first scheduled time in the first timer, by electric machine frequency from setting frequency
Rate starts, with the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
In one embodiment of the invention, described screw pump also includes the second timer, wherein：
Second timer, is switched to non-full pipe for material in screw pump is detected in flow measuring valve from full pipe condition
In the case of state, start timing；
In the case that material inlet valve is used for reaching for second scheduled time in the second timer, valve opening is reverted to
Set aperture.
In one embodiment of the invention, described screw pump also includes the 3rd timer, wherein：
3rd timer, in the case of reverting to setting aperture in valve opening, starts timing；
In the case that screw pump motor is used for reaching for the 3rd scheduled time in three timer, electric machine frequency is reduced
To setpoint frequency.
According to a further aspect in the invention, a kind of method preventing screw pump putty is provided, including：
In flow measuring valve detection screw pump, whether material reaches full pipe condition, and wherein flow measuring valve is arranged on spiral shell
The discharge outlet of bar pump；
If flow measuring valve detects material in screw pump reaches full pipe condition, the valve reducing material inlet valve is opened
Degree, wherein material inlet valve is arranged at the feed pipe of screw pump.
In one embodiment of the invention, methods described also includes：
If flow measuring valve detects material in screw pump and is switched to non-full pipe state from full pipe condition, by inlet valve
The valve opening of door reverts to setting aperture.
In one embodiment of the invention, methods described also includes：
If flow measuring valve detects material in screw pump reaches full pipe condition, the motor frequency of lift-bolt pump motor
Rate；
If flow measuring valve detects material in screw pump and is switched to non-full pipe state from full pipe condition, by screw pump
The electric machine frequency of motor is reduced to setpoint frequency.
In one embodiment of the invention, if flow measuring valve detects material in screw pump and reaches full pipe condition,
Then methods described includes：
First timer starts timing；
If reaching for first scheduled time during the first timer, reduce the valve opening valve opening of material inlet valve, and
And the electric machine frequency of lift-bolt pump motor.
In one embodiment of the invention, the described valve opening valve opening reducing material inlet valve includes：
By the valve opening of material inlet valve from the beginning of setting aperture, gradually decrease to completely close with the first predetermined amplitude；
The electric machine frequency of described lift-bolt pump motor includes：
By the electric machine frequency of lift-bolt pump motor from the beginning of setpoint frequency, gradually risen to specified with the second predetermined amplitude
Frequency.
In one embodiment of the invention, described with the first predetermined amplitude gradually decrease to completely close including：
Gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces；
Described rated frequency is gradually risen to the second predetermined amplitude include：
With the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
In one embodiment of the invention, if flow measuring valve detects material in screw pump and switches from full pipe condition
To non-full pipe state, then methods described includes：
Second timer starts timing；
If reaching for second scheduled time during the second timer, the valve opening of material inlet valve being reverted to setting and opens
Degree.
In one embodiment of the invention, described by the valve opening of material inlet valve revert to setting aperture after, institute
Method of stating also includes：
3rd timer starts timing；
If reaching for the 3rd scheduled time during three timer, the electric machine frequency of screw pump motor is reduced to setting frequency
Rate.
The present invention passes through improved screw pump, is pumping that water content is low and during the material of high microsteping, is not resulting in pipeline
Blocking, such that it is able to prevent screw pump from putty occurring.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 prevents the structural representation of the screw pump first embodiment of putty for the present invention.
Fig. 2 prevents the part connection diagram of the screw pump first embodiment of putty for the present invention.
Fig. 3 prevents the schematic diagram of the screw pump 3rd embodiment of putty for the present invention.
Fig. 4 prevents the schematic diagram of the screw pump 3rd embodiment of putty for the present invention.
Fig. 5 prevents the schematic diagram of the screw pump fourth embodiment of putty for the present invention.
Fig. 6 prevents the schematic diagram of the method first embodiment of screw pump putty for the present invention.
Fig. 7 prevents the schematic diagram of the method second embodiment of screw pump putty for the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, and never conduct to the present invention and its application or makes
Any restriction.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of protection of the invention.
Unless specifically stated otherwise, the part otherwise illustrating in these embodiments and positioned opposite, the digital table of step
Reach formula and numerical value does not limit the scope of the invention.
Simultaneously it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
When in the case of, described technology, method and apparatus should be considered authorize description a part.
In all examples with discussion shown here, any occurrence should be construed as merely exemplary, and not
It is as restriction.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then do not need it is further discussed in subsequent accompanying drawing.
Fig. 1 prevents the structural representation of the screw pump of putty (screw rod charging pump) embodiment for the present invention.As Fig. 1 institute
Show, the described screw pump 1 preventing putty includes flow measuring valve 11 and material inlet valve 12, wherein：
Flow measuring valve 11 is arranged on the discharge outlet of screw pump 1, and material inlet valve 12 is arranged on the feed pipe of screw pump 1
Place, feed pipe is connected with charging aperture 13.
Fig. 2 prevents the part connection diagram of the screw pump first embodiment of putty for the present invention.As shown in Fig. 2 flow
Detection switch 11 and material inlet valve 12 electrically connect.
Flow measuring valve 11, for detecting in screw pump 1, whether material reaches full pipe condition.
Material inlet valve 12, for detecting, in flow measuring valve 11, the situation that material in screw pump 1 reaches full pipe condition
Under, reduce valve opening.
The screw pump preventing putty being provided based on the above embodiment of the present invention, installs flow detection in screw pump exit
Switch, when the material in pipeline reaches full pipe condition and runs under full pipe condition for a long time and extremely easily causes putty, when
Trigger flow switch when material full packages, now start to eliminate full pipe condition, turn down material inlet valve.By the above-mentioned enforcement of this present invention
Water content is low and during the material of high microsteping, do not result in line clogging, such that it is able to prevent screw pump from putty occurring for example pumping.
In one embodiment of the invention, material inlet valve 12 can be also used for screw rod is detected in flow measuring valve 11
In pump 1, material, in the case that full pipe condition is switched to non-full pipe state, valve opening is reverted to setting aperture.In the present invention
State embodiment and after full pipe condition eliminates, valve opening can also be reverted to setting aperture, fast according to setting to ensure material
The transmission of degree.
Fig. 3 prevents the schematic diagram of the screw pump 3rd embodiment of putty for the present invention.Compared with Fig. 2 embodiment, in Fig. 1 and
In Fig. 3 embodiment, described screw pump 1 can also include screw pump motor 14, wherein：
As shown in figure 3, flow measuring valve 11 is electrically connected with material inlet valve 12 and screw pump motor 14 respectively.
Screw pump motor 14, for detecting, in flow measuring valve 11, the feelings that material in screw pump 1 reaches full pipe condition
Under condition, lifting motor frequency；And flow measuring valve 11 detect material in screw pump 1 be switched to from full pipe condition non-full
In the case of tubulose state, electric machine frequency is reduced to setpoint frequency.
Wherein, described setpoint frequency is any user's setting value less than Rated motor frequency.
The above embodiment of the present invention installs flow measuring valve in screw pump exit, when the material in pipeline reaches full packages
State and run under full pipe condition for a long time and extremely easily cause putty, triggers flow switch when material full packages, this
When start to eliminate full pipe condition, the electric machine frequency improving screw pump simultaneously turns down material inlet valve.By this above embodiment of the present invention pump
Send water content low and during the material of high microsteping, do not result in line clogging, occur such that it is able to be more effectively prevented from screw pump
Putty.
Fig. 4 prevents the schematic diagram of the screw pump 3rd embodiment of putty for the present invention.Compared with Fig. 3 embodiment, real in Fig. 4
Apply in example, described screw pump 1 can also include the first timer 15, wherein：
First timer 15 is electrically connected with flow measuring valve 11, material inlet valve 12 and screw pump motor 14 respectively.
First timer 15, for detecting, in flow measuring valve 11, the feelings that material in screw pump 1 reaches full pipe condition
Under condition, start timing.
Material inlet valve 12 is used for, in the case that the first timer 15 timing reached for first scheduled time, reducing valve and opening
Degree.
Screw pump motor 14 is used in the case that the first timer 15 timing reached for first scheduled time, lifting motor frequency
Rate.
In one embodiment of the invention, described first scheduled time can be 1 minute.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for first scheduled time,
Just start to eliminate full pipe condition, improve the electric machine frequency of screw pump and turn down material inlet valve.Flow inspection thus can be greatly improved
The accuracy of detection to full pipe condition for the slowdown monitoring switch, it is to avoid erroneous judgement to full pipe condition, such that it is able to be more effectively prevented from screw rod
Putty in pump, it is to avoid frequent operation to electric machine frequency and material inlet valve there is.
In one embodiment of the invention, material inlet valve 12 can be also used for reaching first in the first timer 15 timing
In the case of the scheduled time, with the first predetermined amplitude, valve opening is gradually decreased to completely close from setting aperture；Screw pump
Motor 14 can be also used in the case that the first timer 15 timing reached for first scheduled time, with the second predetermined amplitude by electricity
Unit frequency gradually rises to rated frequency from setpoint frequency.
In one embodiment of the invention, material inlet valve 12 is used for reaching the first pre- timing in the first timer 15 timing
Between in the case of, by valve opening from the beginning of setting aperture, gradually decreased to the first predetermined amplitude and the predetermined interval that reduces
Contract fully；Screw pump motor 14 is used in the case that the first timer 15 timing reached for first scheduled time, by electric machine frequency
From the beginning of setpoint frequency, with the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
In one particular embodiment of the present invention, the rated frequency of screw pump motor 14 is 50Hz.
In one particular embodiment of the present invention, the first predetermined amplitude is 10%, and predetermined reduction is spaced apart 1 minute.That is,
Material inlet valve 12 specifically can be used in the case that the first timer 15 timing reached for first scheduled time, by material inlet valve 12
Valve opening from the beginning of setting aperture, subtract 10% and gradually decrease to completely close according to per minute.
In one particular embodiment of the present invention, the second predetermined amplitude is 5%, and predetermined lifting is spaced apart 1 minute.That is,
Material inlet valve 12 specifically can be used in the case that the first timer 15 timing reached for first scheduled time, by screw pump motor
14 electric machine frequency, from the beginning of setpoint frequency, gradually decreases to completely close according to increase by 5% per minute.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for first scheduled time,
By valve opening from the beginning of setting aperture, gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces；By electricity
Unit frequency from the beginning of setpoint frequency, with the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.The present invention adopts
Eliminate full pipe condition with gradient ground, the mode that gradually converts, such that it is able to avoid drastically changing aperture and frequency to inlet valve
The damage that door and motor cause.
Fig. 5 prevents the schematic diagram of the screw pump fourth embodiment of putty for the present invention.Compared with Fig. 4 embodiment, real in Fig. 5
Apply in example, described screw pump 1 can also include the second timer 16, wherein：
Second timer 16 is electrically connected with flow measuring valve 11 and material inlet valve 12 respectively.
Second timer 16, is switched to from full pipe condition for material in screw pump 1 is detected in flow measuring valve 11
In the case of non-full pipe state, start timing.
Material inlet valve 124 can be also used in the case that the second timer 16 timing reached for second scheduled time, by valve
Door aperture reverts to setting aperture.
In one embodiment of the invention, second scheduled time was 3 minutes.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for second scheduled time,
Just material inlet valve is reverted to setting value.The accuracy of detection to non-full pipe state for the flow measuring valve thus can be greatly improved,
Avoid the erroneous judgement to non-full pipe state, such that it is able to be more effectively prevented from screw pump, putty occurs, it is to avoid to motor frequency
Rate and the frequent operation of material inlet valve.
In one embodiment of the invention, as shown in figure 5, described screw pump 1 can also include the 3rd timer 17, its
In：
3rd timer 17 is electrically connected with material inlet valve 12 and screw pump motor 14 respectively.
3rd timer 17, in the case of reverting to setting aperture in valve opening, starts timing.
Screw pump motor 14 can be also used in the case that the 3rd timer 17 timing reached for the 3rd scheduled time, by electricity
Unit frequency is reduced to setpoint frequency.
In one embodiment of the invention, the 3rd scheduled time was 1 minute.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for second scheduled time,
Just material inlet valve is reverted to setting value；After 3rd scheduled time afterwards, then the frequency of screw pump motor is reduced to setting value.
The above embodiment of the present invention first adjusts the aperture of material inlet valve, then adjusts the frequency of screw pump motor, thus can avoid screw rod
It is impossible to quickly transmit the technical problem of the material accelerating to flow into after material inlet valve is replied, thus after the frequency of pump motor first reduces
Screw pump can be more effectively prevented from putty occurs.
Fig. 6 prevents the schematic diagram of the method first embodiment of screw pump putty for the present invention.As shown in Figure 6 it is preferred that this
Embodiment can be executed by the screw pump that the present invention prevents putty.The method comprises the following steps：
Step 601, in flow measuring valve 11 detection screw pump 1, whether material reaches full pipe condition, wherein flow detection
Switch 11 is arranged on the discharge outlet of screw pump 1.
Step 602, if flow measuring valve 11 detects material in screw pump 1 and reaches full pipe condition, reduces inlet valve
The valve opening of door 12, wherein material inlet valve 12 is arranged at the feed pipe of screw pump 1.
Step 603, if flow measuring valve 11 detects material in screw pump 1 and is switched to non-full tubulose from full pipe condition
State, then revert to setting aperture by the valve opening of material inlet valve 12.
The method preventing screw pump putty being provided based on the above embodiment of the present invention, installs flow in screw pump exit
Detection switch, when the material in pipeline reach full pipe condition and running under full pipe condition for a long time extremely easily cause stifled
Material, triggers flow switch when material full packages, now starts to eliminate full pipe condition, turns down material inlet valve.By in this present invention
State embodiment pumping water content is low and during the material of high microsteping, do not result in line clogging, such that it is able to prevent screw pump from occurring
Putty.
Valve opening can also be reverted to setting aperture, to protect after full pipe condition eliminates by the above embodiment of the present invention
Exhibit material is according to the transmission of setting speed.
Fig. 7 prevents the schematic diagram of the method second embodiment of screw pump putty for the present invention.As shown in Figure 7 it is preferred that this
Embodiment can be executed by the screw pump that the present invention prevents putty.The method comprises the following steps：
Step 701, in flow measuring valve 11 detection screw pump 1, whether material reaches full pipe condition, wherein flow detection
Switch 11 is arranged on the discharge outlet of screw pump 1.
Step 702, if flow measuring valve 11 detects material in screw pump 1 and reaches full pipe condition, reduces inlet valve
The valve opening of door 12, wherein material inlet valve 12 is arranged at the feed pipe of screw pump 1；The motor frequency of lift-bolt pump motor 14
Rate.
Step 703, if flow measuring valve 11 detects material in screw pump 1 and is switched to non-full tubulose from full pipe condition
State, then revert to setting aperture by the valve opening of material inlet valve 12；The electric machine frequency of screw pump motor 14 is reduced to setting
Frequency.
The above embodiment of the present invention installs flow measuring valve in screw pump exit, when the material in pipeline reaches full packages
State and run under full pipe condition for a long time and extremely easily cause putty, triggers flow switch when material full packages, this
When start to eliminate full pipe condition, the electric machine frequency improving screw pump simultaneously turns down material inlet valve.By this above embodiment of the present invention pump
Send water content low and during the material of high microsteping, do not result in line clogging, occur such that it is able to be more effectively prevented from screw pump
Putty.
In one embodiment of the invention, the step 702 in Fig. 6 embodiment can include：
Step 7021, the first timer 15 starts timing.
Step 7022, if the first timer 15 timing reached for first scheduled time, the valve reducing material inlet valve 12 is opened
Degree valve opening, and the electric machine frequency of lift-bolt pump motor 14.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for first scheduled time,
Just start to eliminate full pipe condition, improve the electric machine frequency of screw pump and turn down material inlet valve.Flow inspection thus can be greatly improved
The accuracy of detection to full pipe condition for the slowdown monitoring switch, it is to avoid erroneous judgement to full pipe condition, such that it is able to be more effectively prevented from screw rod
Putty in pump, it is to avoid frequent operation to electric machine frequency and material inlet valve there is.
In one embodiment of the invention, in step 7022, the described valve opening valve reducing material inlet valve 12 is opened
The step of degree can include：By the valve opening of material inlet valve 12 from the beginning of setting aperture, it is gradually reduced with the first predetermined amplitude
To completely closing.
In one particular embodiment of the present invention, the described step gradually decreasing to the first predetermined amplitude completely close
Can include：Gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces.
In one embodiment of the invention, in step 7022, the step of the electric machine frequency of described lift-bolt pump motor 14
Suddenly can include：By the electric machine frequency of lift-bolt pump motor 14 from the beginning of setpoint frequency, gradually lifted with the second predetermined amplitude
To rated frequency.
In one particular embodiment of the present invention, the described step that rated frequency is gradually risen to the second predetermined amplitude
Can include：With the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for first scheduled time,
By valve opening from the beginning of setting aperture, gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces；By electricity
Unit frequency from the beginning of setpoint frequency, with the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.The present invention adopts
Eliminate full pipe condition with gradient ground, the mode that gradually converts, such that it is able to avoid drastically changing aperture and frequency to inlet valve
The damage that door and motor cause.
In one embodiment of the invention, the step 703 in Fig. 6 embodiment can include：
Step 7031, the second timer 16 starts timing.
Step 7032, if the second timer 16 timing reached for second scheduled time, by the valve opening of material inlet valve 12
Revert to setting aperture.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for second scheduled time,
Just material inlet valve is reverted to setting value.The accuracy of detection to non-full pipe state for the flow measuring valve thus can be greatly improved,
Avoid the erroneous judgement to non-full pipe state, such that it is able to be more effectively prevented from screw pump, putty occurs, it is to avoid to motor frequency
Rate and the frequent operation of material inlet valve.
In one embodiment of the invention, after step 7032, methods described can also include：
Step 7033, the 3rd timer 17 starts timing.
Step 70324, if the 3rd timer 17 timing reached for the 3rd scheduled time, by the motor frequency of screw pump motor 14
Rate is reduced to setpoint frequency.
The above embodiment of the present invention in the case that material reaches full pipe condition and the persistent period reached for second scheduled time,
Just material inlet valve is reverted to setting value；After 3rd scheduled time afterwards, then the frequency of screw pump motor is reduced to setting value.
The above embodiment of the present invention first adjusts the aperture of material inlet valve, then adjusts the frequency of screw pump motor, thus can avoid screw rod
It is impossible to quickly transmit the technical problem of the material accelerating to flow into after material inlet valve is replied, thus after the frequency of pump motor first reduces
Screw pump can be more effectively prevented from putty occurs.
Below by specific example, the present invention will be described：
As shown in figure 1, in one specific embodiment of the present invention, installing flow measuring valve in the exit of screw pump 1
11, when material reaches full pipe condition and the persistent period reaches 1 minute, material inlet valve 12 is subtracted 10% from setting according to per minute
Value is reduced to and is completely closed；And lift-bolt pump motor 4 frequency simultaneously, increase by 5% until 50Hz according to per minute.When flow is opened
Pass can't detect material when being that non-full pipe state reaches 3 minutes, first material inlet valve 3 is reverted to setting value；Again by spiral shell after 1 minute
Bar pump motor 4 reduces frequency to setting value.Putty can effectively be prevented by this above embodiment of the present invention.
So far, the present invention is described in detail.In order to avoid covering the design of the present invention, this area institute is not described public
Some details known.Those skilled in the art as described above, completely it can be appreciated how implement technology disclosed herein
Scheme.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware
To complete it is also possible to the hardware being instructed correlation by program is completed, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
Description of the invention is given for the sake of example and description, and is not exhaustively or by the present invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Select and retouch
Stating embodiment is in order to the principle of the present invention and practical application are more preferably described, and so that those of ordinary skill in the art is managed
The solution present invention is thus design is suitable to the various embodiments with various modifications of special-purpose.
Claims (16)
1. a kind of screw pump preventing putty is it is characterised in that include flow measuring valve and material inlet valve, wherein：
Flow measuring valve is arranged on the discharge outlet of screw pump, and material inlet valve is arranged at the feed pipe of screw pump；
Flow measuring valve, for detecting in screw pump, whether material reaches full pipe condition；
Material inlet valve, for detecting in the case that material reaches full pipe condition in screw pump in flow measuring valve, reduces valve
Door aperture.
2. screw pump according to claim 1 it is characterised in that
Material inlet valve is additionally operable to material in screw pump is detected in flow measuring valve and is switched to non-full pipe state from full pipe condition
In the case of, valve opening is reverted to setting aperture.
3. screw pump according to claim 1 and 2 is it is characterised in that also include screw pump motor, wherein：
Screw pump motor, for detecting in the case that in screw pump, material reaches full pipe condition in flow measuring valve, lifting
Electric machine frequency；And detect, in flow measuring valve, the situation that material in screw pump is switched to non-full pipe state from full pipe condition
Under, electric machine frequency is reduced to setpoint frequency.
4. screw pump according to claim 3 is it is characterised in that also include the first timer, wherein：
First timer, for detecting in the case that in screw pump, material reaches full pipe condition in flow measuring valve, starts
Timing；
In the case that material inlet valve is used for reaching for first scheduled time in the first timer, reduce valve opening；
In the case that screw pump motor is used for reaching for first scheduled time in the first timer, lifting motor frequency.
5. screw pump according to claim 4 it is characterised in that
In the case that material inlet valve is used for reaching for first scheduled time in the first timer, with the first predetermined amplitude by valve
Aperture gradually decreases to completely close from setting aperture；
In the case that screw pump motor is used for reaching for first scheduled time in the first timer, with the second predetermined amplitude by electricity
Unit frequency gradually rises to rated frequency from setpoint frequency.
6. screw pump according to claim 5 it is characterised in that
In the case that material inlet valve is used for reaching for first scheduled time in the first timer, by valve opening from setting aperture
Start, gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces；
In the case that screw pump motor is used for reaching for first scheduled time in the first timer, by electric machine frequency from setting frequency
Rate starts, with the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
7. screw pump according to claim 3 is it is characterised in that also include the second timer, wherein：
Second timer, is switched to non-full pipe state for material in screw pump is detected in flow measuring valve from full pipe condition
In the case of, start timing；
In the case that material inlet valve is used for reaching for second scheduled time in the second timer, valve opening is reverted to setting
Aperture.
8. screw pump according to claim 7 is it is characterised in that also include the 3rd timer, wherein：
3rd timer, in the case of reverting to setting aperture in valve opening, starts timing；
In the case that screw pump motor is used for reaching for the 3rd scheduled time in three timer, electric machine frequency is reduced to and sets
Determine frequency.
9. a kind of method preventing screw pump putty is it is characterised in that include：
In flow measuring valve detection screw pump, whether material reaches full pipe condition, and wherein flow measuring valve is arranged on screw pump
Discharge outlet；
If flow measuring valve detects material in screw pump reaches full pipe condition, reduce the valve opening of material inlet valve, its
Middle material inlet valve is arranged at the feed pipe of screw pump.
10. method according to claim 9 is it is characterised in that also include：
If flow measuring valve detects material in screw pump and is switched to non-full pipe state from full pipe condition, by material inlet valve
Valve opening reverts to setting aperture.
11. methods according to claim 9 or 10 are it is characterised in that also include：
If flow measuring valve detects material in screw pump reaches full pipe condition, the electric machine frequency of lift-bolt pump motor；
If flow measuring valve detects material in screw pump and is switched to non-full pipe state from full pipe condition, by screw pump motor
Electric machine frequency be reduced to setpoint frequency.
If 12. methods according to claim 11 are it is characterised in that flow measuring valve detects material in screw pump reaches
To full pipe condition, then methods described includes：
First timer starts timing；
If reaching for first scheduled time during the first timer, reduce the valve opening valve opening of material inlet valve, and carry
Rise the electric machine frequency of screw pump motor.
13. methods according to claim 12 are it is characterised in that the valve opening valve opening of described reduction material inlet valve
Including：
By the valve opening of material inlet valve from the beginning of setting aperture, gradually decrease to completely close with the first predetermined amplitude；
The electric machine frequency of described lift-bolt pump motor includes：
By the electric machine frequency of lift-bolt pump motor from the beginning of setpoint frequency, specified frequency is gradually risen to the second predetermined amplitude
Rate.
14. methods according to claim 13 are it is characterised in that described gradually decrease to close completely with the first predetermined amplitude
Closure includes：
Gradually decrease to completely close with the first predetermined amplitude and the predetermined interval that reduces；
Described rated frequency is gradually risen to the second predetermined amplitude include：
With the second predetermined amplitude and predetermined hoist-hole every gradually rising to rated frequency.
If 15. methods according to claim 11 it is characterised in that flow measuring valve detect in screw pump material from
Full pipe condition is switched to non-full pipe state, then methods described includes：
Second timer starts timing；
If reaching for second scheduled time during the second timer, the valve opening of material inlet valve is reverted to setting aperture.
16. methods according to claim 15 are it is characterised in that described revert to setting by the valve opening of material inlet valve
After aperture, also include：
3rd timer starts timing；
If reaching for the 3rd scheduled time during three timer, the electric machine frequency of screw pump motor is reduced to setpoint frequency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953085.4A CN106401944B (en) | 2016-11-03 | 2016-11-03 | The method for preventing the screw pump of putty and preventing screw pump putty |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953085.4A CN106401944B (en) | 2016-11-03 | 2016-11-03 | The method for preventing the screw pump of putty and preventing screw pump putty |
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| CN106401944A true CN106401944A (en) | 2017-02-15 |
| CN106401944B CN106401944B (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591053A (en) * | 2018-07-06 | 2018-09-28 | 乌鲁木齐昆仑环保集团有限公司 | A kind of anti-blocking broken bridge method of sludge screw pump feed inlet |
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| CN2084526U (en) * | 1991-02-23 | 1991-09-11 | 应必文 | Screw pump |
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| CN203429284U (en) * | 2013-08-29 | 2014-02-12 | 山东翔宇化纤有限公司 | Screw extruder for polyamide fiber production |
| CN204113131U (en) * | 2014-09-19 | 2015-01-21 | 中国石油天然气股份有限公司 | Screw pump tubular column for coal bed gas well |
| CN205172932U (en) * | 2015-11-05 | 2016-04-20 | 刘佳 | Single -screw pump |
| CN206144780U (en) * | 2016-11-03 | 2017-05-03 | 福建金闽再造烟叶发展有限公司 | Prevent spiral shell sucker -rod pumping of putty |
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| CN2084526U (en) * | 1991-02-23 | 1991-09-11 | 应必文 | Screw pump |
| CN201726853U (en) * | 2010-06-30 | 2011-02-02 | 上海烟草（集团）公司 | Charging system |
| CN203429284U (en) * | 2013-08-29 | 2014-02-12 | 山东翔宇化纤有限公司 | Screw extruder for polyamide fiber production |
| CN204113131U (en) * | 2014-09-19 | 2015-01-21 | 中国石油天然气股份有限公司 | Screw pump tubular column for coal bed gas well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591053A (en) * | 2018-07-06 | 2018-09-28 | 乌鲁木齐昆仑环保集团有限公司 | A kind of anti-blocking broken bridge method of sludge screw pump feed inlet |
| CN108591053B (en) * | 2018-07-06 | 2023-09-26 | 乌鲁木齐昆仑环保集团有限公司 | Anti-blocking bridge-breaking method for feed inlet of sludge screw pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106401944B (en) | 2018-05-25 |
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