CN114738592A - Anti-blocking device for water inlet pipeline of irrigation water supply pump and control method thereof - Google Patents
Anti-blocking device for water inlet pipeline of irrigation water supply pump and control method thereof Download PDFInfo
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- CN114738592A CN114738592A CN202210497014.3A CN202210497014A CN114738592A CN 114738592 A CN114738592 A CN 114738592A CN 202210497014 A CN202210497014 A CN 202210497014A CN 114738592 A CN114738592 A CN 114738592A
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- pressure
- adjusting
- pipeline
- pressure detector
- water inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/20—Controlling the acceleration or deceleration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/24—Controlling the direction, e.g. clockwise or counterclockwise
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
Abstract
The invention discloses an anti-clogging device of an irrigation water supply pump water inlet pipeline and a control method thereof, aiming at providing an anti-clogging device of an irrigation water supply pump water inlet pipeline with good anti-clogging effect, and realizing the judgment of grindable or non-grindable impurities by taking the difference of pressures detected by two pressure detectors as a regulation and control standard in cooperation with the structural arrangement of a regulating pipeline, thereby making correct control on a water pump motor, the technical proposal is that the regulating pipeline with one end communicated with the water inlet pipeline and the other end in a closed state is adopted, the regulating pipeline structure is used for controlling the water pressure of the water inlet pipeline, when the blockage occurs, a first piston sealing plate which is arranged in the regulating pipeline and slides in a piston type of the regulating pipeline can move because of the gradual increase of the water pressure, and simultaneously the moving space of a blockage is also increased, thereby enabling a flow passage to form a passage gradually, the anti-blocking effect is greatly improved, and the anti-blocking device is suitable for the technical field of pipeline anti-blocking.
Description
Technical Field
The invention relates to the technical field of pipeline anti-blocking, in particular to an anti-blocking device for a water inlet pipeline of an irrigation water supply pump and a control method thereof.
Background
The pump is an indispensable core device for fluid delivery, is widely applied to the requirements of industry, agriculture and our daily life, and has various types and performances according to different purposes. Most of the pumps used in agriculture today are used as power sources in irrigation water supply processes to deliver irrigation water to agricultural fields.
At present, the anti-blocking device of the water inlet pipeline of the irrigation water supply pump in the market comprises a water inlet pipeline. Traditional working shaft is at the during operation, and is less relatively to the processing mode at water source, and the quality of water condition direct influence of water source is efficiency when irrigating, and if the condition that has the jam still is that the motor of pump burns out easily, and the practicality is relatively poor moreover, has the safety risk to a certain extent.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the anti-blocking device for the irrigation water supply pump water inlet pipeline, which has a good anti-blocking effect, realizes the judgment of grindable or non-grindable impurities by taking the difference value of the pressures detected by the two pressure detectors as a regulation and control standard and matching with the structural arrangement of the regulating pipeline, and further correctly controls the water pump motor.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an irrigation feed pump water inlet line's anti-clogging device, includes the water intake pipe, the both sides tip of water intake pipe is provided with first pressure detector and second pressure detector respectively, the water intake pipe is connected with and sets up between first, two pressure detectors and be used for preventing blockking up the adjustment mechanism, this adjustment mechanism includes that one end and water intake pipe intercommunication and the other end are in the adjustment pipeline of closure state, set up in the adjustment pipeline and in the gliding first piston shrouding of adjustment pipeline piston, be connected with the adjustment pipeline and in the adjustment air chamber that first piston shrouding is connected, the cover is located the outer supporting spring of first piston shrouding and sets up the adjusting part of adjusting the air chamber internal pressure, the adjustment pipeline overcoat is equipped with the scavenge chamber of being connected with the water intake pipe, scavenge chamber and adjustment pipeline communicate with each other.
The invention is further configured to: the adjusting assembly comprises a second piston sealing plate which is in piston type sliding connection with the adjusting air chamber and is connected with the first piston sealing plate, an air inlet channel and an air outlet channel which are arranged on the adjusting air chamber, a one-way valve which is only used for air outlet and an electromagnetic on-off valve which is arranged in the air inlet channel, wherein the one-way valve is arranged on the air outlet channel.
The invention is further configured to: still be equipped with inner support structure in the accent air pocket for the limit displacement distance of restriction second piston shrouding, inner support mechanism is including setting up in interior chamber, regulating plate, regulation pole, reset spring and the interior baffle in the accent air pocket, and it is just to the spout that has inside extension of the one end of shrouding, be provided with the apron on the port of spout, the regulating plate slides and sets up in the spout, adjust pole one end and set up on the regulating plate, the other end passes the apron setting, interior baffle sets up and serves in the stretching out of adjusting the pole, reset spring cover is located on the regulation pole.
The invention is further configured to: the inner support mechanism further comprises a pressure regulator arranged in the inner cavity, the pressure regulator comprises a permanent magnet arranged on the adjusting plate and back to the adjusting rod, an electromagnet arranged on the inner wall of the adjusting air chamber and right opposite to the permanent magnet, and a pressure sensor arranged on the inner baffle and right opposite to the second piston sealing plate, the magnetic pole of the permanent magnet is arranged to be repellent with the electromagnet after being electrified, and the electromagnet, the pressure sensor, the first pressure detector and the second pressure detector are electrically connected to the controller.
The invention is further configured to: the inner diameter of the adjusting pipeline is larger than that of the water inlet pipeline, and the inner diameter of the adjusting pipeline is 1.5-2 times that of the water inlet pipeline.
The invention is further configured to: the volume of the containing cavity of the ventilation chamber is larger than that of the regulating pipeline, and the volume of the containing cavity of the ventilation chamber is 1.5-2 times of that of the regulating pipeline.
The invention is further configured to: an air outlet is arranged on the air exchange chamber, a sealing plug is arranged on the air outlet, and the sealing plug is connected with the air outlet through threads.
By adopting the technical scheme, the water pressure control device has the advantages that 1, the regulating pipeline is communicated with the water inlet pipeline through the arranged one end, the other end is in a closed state, the regulating pipeline structure is used for controlling the water pressure of the water inlet pipeline, when the blockage occurs, the first piston sealing plate which is arranged in the regulating pipeline and slides in a piston type manner in the regulating pipeline can move due to the gradual increase of the water pressure, and the moving space of a blockage is increased, so that a passage is formed gradually in a flow passage, the blockage prevention effect is greatly improved, the practicability is strong, the structure is simple, the regulating air chamber which is connected with the regulating pipeline and connected with the first piston sealing plate can ensure the position after the movement of the first piston sealing plate, the supporting spring which is sleeved outside the first piston sealing plate and the regulating component which is arranged at the pressure of the regulating air chamber are sleeved outside the regulating pipeline, and the air exchange chamber which is connected with the water inlet pipeline is sleeved outside the regulating pipeline, the ventilation chamber is communicated with the adjusting pipeline, and the water pressure at the two ends of the water inlet pipeline is judged through the detection of the two pressure detectors, whether blockage exists is judged, the detection precision is high, and the practicability is high;
2. the adjusting assembly comprises a second piston sealing plate which is in piston sliding connection with the adjusting air chamber and is connected with the first piston sealing plate, an air inlet channel and an air outlet channel which are arranged on the adjusting air chamber, and a one-way valve which is arranged on the air outlet channel and is only used for air outlet and an electromagnetic on-off valve which is arranged in the air inlet channel;
3. the inner support structure is further arranged in the air adjusting chamber and used for limiting the limit moving distance of the second piston sealing plate, the inner support structure comprises an inner chamber arranged in the air adjusting chamber, an adjusting plate, an adjusting rod, a reset spring and an inner baffle, the inner support structure is opposite to one end of the sealing plate, a sliding groove extends inwards, a cover plate is arranged on a port of the sliding groove, the adjusting plate is arranged in the sliding groove in a sliding mode, one end of the adjusting rod is arranged on the adjusting plate, the other end of the adjusting rod penetrates through the cover plate, the inner baffle is arranged at the extending end of the adjusting rod, the reset spring is sleeved on the adjusting rod, the structure is adopted, the rapid impact of water pressure on the first piston sealing plate is reduced through the added inner support structure, the effect of limiting the first piston sealing plate is formed, and the stability of water flow is improved;
4. the pressure regulator is further arranged to comprise a permanent magnet which is arranged on the adjusting plate and is back to the adjusting rod, an electromagnet which is arranged on the inner wall of the adjusting air chamber and is right opposite to the permanent magnet, and a pressure sensor which is arranged on the inner baffle and is right opposite to the second piston sealing plate, the magnetic pole of the permanent magnet is arranged to be repellent to the electrified electromagnet, the pressure sensor, the first pressure detector and the second pressure detector are all electrically connected to the controller, and the permanent magnet structure and the electromagnet are matched to form repellency to the permanent magnet, so that the support of the adjusting plate is ensured, good stability and adjusting effect are improved, the practicability is high, and the structure is simple.
A method for controlling an anti-clogging device for a water inlet line of an irrigation water supply pump as described above, said controller comprising a receiving unit for receiving electrical signals from a first pressure detector, a second pressure detector and a pressure sensor; a comparison unit for comparing the pressures detected by the first pressure detector and the second pressure detector; the control unit is used for controlling the forward and reverse output currents of the pump motor and controlling the output magnitude of the output electromagnet current; the counting unit is used for counting the times of the pressure detected by the pressure sensor; and open and stop the unit for control electromagnetism break-make valve break-make, motor open and stop and electromagnet circuit opens and stops, be equipped with apart from the inductor between second piston shrouding and the interior baffle, the controller still includes the distance monitoring unit who is used for receiving second piston shrouding position signal, including following step:
s1, the irrigation water supply pump works normally, the first pressure detector and the second pressure detector detect the water pressure at two ends of the water inlet pipeline in real time, the allowable floating value of the difference value of the detection values of the first pressure detector and the second pressure detector is set to be 0-PO in the comparison unit, and the counting value of the counting unit is a normal value between 5-10 times;
in the time periods of S2 and T1, the pressure detected by the first pressure detector is P1, the pressure detected by the second pressure detector is P2, the comparing unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, calculates the difference value between P1 and P2 as P, whether P is between 0 and P0, and if so, continues to detect the pressure at the two ends of the water inlet pipeline; if not, increasing the torque of the motor through the control unit;
detecting whether the pressure sensor detects pressure or not within the time periods of S3 and T2, if the pressure is detected, the pressure detected by the first pressure detector is measured as P3, the pressure detected by the second pressure detector is measured as P4, the comparing unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P3 and P4 is calculated as P, whether P is between 0 and P0 or not is calculated, and if the difference value is P, the rotating speed of the motor is increased through the control unit; if not, the control unit outputs reverse current, the motor rotates reversely, and the blockage is discharged;
s4, in a T3 time period after the rotating speed of the motor is increased through the control unit, the pressure detected by the first pressure detector is measured as P5, the pressure detected by the second pressure detector is measured as P6, the comparison unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P5 and P6 is calculated as P, whether P is between 0 and P0, and if yes, the rotating speed of the motor is increased through the control unit; if not, the control unit alternately performs positive rotation and negative rotation on the motor, grinds the blockage and dredges the pipeline;
in the time periods of S5 and T4, the counting unit counts the pressure detection times, the counted value is K, if K is less than 5 times or between 5 and 10 times, the current water quality environment of the pump is judged to be relatively normal, if K is more than 10 times, the current water quality environment of the pump is judged to be poor, an alarm is given, and a user needs to clean the water quality or switch the water quality to other water sources;
s6, when the pressure sensor detects that the pressure is lost, the controller opens the electromagnetic on-off valve on the air inlet channel to balance the air pressure in the air chamber and the air pressure in the main chamber, and the second piston sealing plate is reset under the action of the supporting spring;
s7, detecting the position of the second piston seal plate when the second piston seal plate is stressed by the position sensor, recording the maximum displacement value of the second piston seal plate when the second piston seal plate is stressed, keeping the maximum displacement value in a T5 time period, and closing an electromagnetic on-off valve in an air inlet channel all the time to enable an air chamber to be in an air outlet state all the time until the position reached by the second piston seal plate is the maximum displacement value in a T4 time period; adjusting the current of the electromagnet circuit to enable the electromagnet and the permanent magnet to form a repellent state, so as to limit the maximum displacement of the second piston seal plate;
s8, looping steps S1-S5.
By adopting the technical scheme, the method has the advantages that the pressure at the two ends is detected by the first pressure detector and the second pressure detector which are arranged on the two end sides of the water inlet channel respectively through the arranged adjusting pipeline, the pressure difference at the two ends tends to 0 in a constant state, but the pressure difference at the two ends is increased when blockage occurs, and the method adopts the two pressure detectors to judge whether the blockage occurs or not;
the method also comprises the steps that the adjusting pipeline is matched with the adjusting air chamber, when the adjusting pipeline is blocked, the second piston sealing plate in the adjusting pipeline moves inwards due to the impact of water pressure, and the moved position is maintained under the action of the adjusting air chamber, so that the blockage can have a large moving space, and the blockage can be discharged;
the method has various different conditions, firstly, the blockage can be loosened and has no tension, the detection means is that the blockage is sucked above the first piston sealing plate, if the pressure difference between two sides of the water inlet channel is between 0 and P0 after the first piston sealing plate moves downwards, the blockage is judged to be grindable, and the blockage can be ground in a torque increasing or driving motor positive and negative rotation mode; on the contrary, if the blockage is always positioned at the front section of the adjusting channel, when the pressure difference between two sides of the water inlet channel is greater than P0, and the position of the first piston sealing plate does not move, or when the blockage is positioned above the first piston sealing plate, the water pressure difference is not changed, the situation that the blockage is not grindable and has elasticity is judged, and the impeller is required to be reversely driven to discharge the blockage;
when meeting the above-mentioned condition, prevent blockking up the processing to the pump, easily realize the adaptation most environment at the in-process that uses.
Drawings
FIG. 1 is a perspective view of a pump according to an embodiment of the present invention illustrating an anti-clogging device for an inlet pipe of an irrigation water supply pump and a method for controlling the same.
FIG. 2 is a schematic cross-sectional view of a water inlet line of an anti-clogging device for an irrigation water supply pump and a control method thereof according to an embodiment of the present invention.
Fig. 3 is an enlarged schematic view of a structure a in fig. 2 illustrating an anti-clogging device for an irrigation water supply pump water inlet line and a control method thereof according to an embodiment of the present invention.
FIG. 4 is a flow chart of an embodiment of an anti-clogging device for an inlet pipe of an irrigation water supply pump and a control method thereof according to the present invention, and FIG. 1.
FIG. 5 is a flow chart of an embodiment of an anti-clogging device for an inlet pipe of an irrigation water supply pump and a control method thereof according to the present invention, and FIG. 2.
FIG. 6 is a flow chart of an embodiment of the anti-clogging device for the water inlet pipeline of an irrigation water supply pump and a control method thereof according to the present invention, and FIG. 3.
The reference number in the figure, 1, water inlet pipeline; 10. a first pressure detector; 11. a second pressure detector; 2. adjusting the pipeline; 20. a first piston seal plate; 21. adjusting the air chamber; 210. an air intake passage; 211. an air outlet channel; 212. a one-way valve; 213. an electromagnetic on-off valve; 22. a support spring; 23. a second piston seal plate; 3. a ventilation chamber; 40. an inner chamber; 41. an adjusting plate; 42. adjusting a rod; 43. a return spring; 44. an inner baffle; 50. a permanent magnet; 51. an electromagnet; 52. a pressure sensor; 6. a controller; 7. and (6) sealing the plug.
Detailed Description
An embodiment of an anti-clogging device for an irrigation water supply pump water inlet line and a method for controlling the same according to the present invention will be further described with reference to fig. 1 to 6.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
An anti-blocking device for a water inlet pipeline 1 of an irrigation water supply pump comprises a water inlet pipeline 1, wherein a first pressure detector 10 and a second pressure detector 11 are respectively arranged at two side ends of the water inlet pipeline 1, the water inlet pipeline 1 is connected with an adjusting mechanism which is arranged between the first pressure detector and the second pressure detector and used for blocking prevention, the adjusting mechanism comprises an adjusting pipeline 2, one end of which is communicated with the water inlet pipeline 1, the other end of which is in a closed state, a first piston seal plate 20 which is arranged in the adjusting pipeline 2 and slides in a piston manner in the adjusting pipeline 2, an adjusting air chamber 21 which is connected with the adjusting pipeline 2 and is connected with the first piston seal plate 20, a supporting spring 22 which is sleeved outside the first piston seal plate 20 and an adjusting component which is arranged in the adjusting air chamber 21, a ventilation chamber 3 which is connected with the water inlet pipeline 1 is sleeved outside the adjusting pipeline 2, and the ventilation chamber 3 is communicated with the adjusting pipeline 2, the regulating pipeline 2 is communicated with the water inlet pipeline 1 through one end and the other end is in a closed state, the regulating pipeline 2 is used for controlling the water pressure of the water inlet pipeline 1, when the blockage occurs, a first piston sealing plate 20 which is arranged in the regulating pipeline 2 and slides in a piston mode on the regulating pipeline 2 moves due to the gradual increase of the water pressure, and the moving space of a blockage is enlarged, so that a flow passage is formed gradually, the blockage prevention effect is greatly improved, the practicability is strong, the structure is simple, a regulating air chamber 21 which is connected with the regulating pipeline 2 and connected with the first piston sealing plate 20 can ensure the position after the first piston sealing plate 20 moves, a supporting spring 22 which is sleeved outside the first piston sealing plate 20 and a regulating component which is arranged in the regulating air chamber 21 and is sleeved with a ventilation chamber 3 which is connected with the water inlet pipeline 1 are sleeved outside the regulating pipeline 2, the ventilation chamber 3 is communicated with the adjusting pipeline 2, the water pressure at two ends of the water inlet pipeline is judged through the detection of the two pressure detectors, whether blockage exists or not is judged, the detection precision is high, and the practicability is high.
The invention further provides that the adjusting component comprises a second piston sealing plate 23 which is in piston sliding connection with the adjusting air chamber 21 and is connected with the first piston sealing plate 20, an air inlet channel 210 and an air outlet channel 211 which are arranged on the adjusting air chamber 21, a one-way valve 212 which is arranged on the air outlet channel 211 and is only used for air outlet, and an electromagnetic on-off valve 213 which is arranged in the air inlet channel 210, by adopting the structure that the adjusting component comprises the second piston sealing plate 23 which is in piston sliding connection with the adjusting air chamber 21 and is connected with the first piston sealing plate 20, the air inlet channel 210 and the air outlet channel 211 which are arranged on the adjusting air chamber 21, the one-way valve 212 which is arranged on the air outlet channel 211 and is only used for air outlet, and the electromagnetic on-off valve 213 which is arranged in the air inlet channel 210, because the first piston sealing plate 20 is directly contacted with fluid, when the fluid pressure is increased, the pressure is formed on the first piston sealing plate 20, the second piston sealing plate 23 in the adjusting air chamber 21 is connected to the first piston sealing plate 20 and performs corresponding activities, at this time, the air in the adjusting air chamber 21 passes through the one-way valve 212, the air is discharged, and at this time, the air pressure outside the adjusting air chamber 21 is greater than the air pressure in the adjusting air chamber 21, so that the first piston sealing plate 20 is located at the current position, and the flow of the blocking object is ensured.
The invention is further arranged that an inner supporting structure is arranged in the adjusting air chamber 21 and used for limiting the limit moving distance of the second piston sealing plate 23, the inner supporting structure comprises an inner chamber 40, an adjusting plate 41, an adjusting rod 42, a return spring 43 and an inner baffle 44 which are arranged in the adjusting air chamber 21, one end of the inner supporting structure, which is opposite to one end of the sealing plate, is provided with a chute extending inwards, a cover plate is arranged on the port of the chute, the adjusting plate 41 is arranged in the chute in a sliding manner, one end of the adjusting rod 42 is arranged on the adjusting plate 41, the other end of the adjusting rod passes through the cover plate, the inner baffle 44 is arranged on the extending end of the adjusting rod 42, the return spring 43 is sleeved on the adjusting rod 42, the inner supporting structure is further arranged in the adjusting air chamber 21 and used for limiting the limit moving distance of the second piston sealing plate 23, and the inner supporting structure comprises an inner chamber 40, the adjusting plate 41, the adjusting rod 42, an inner supporting structure, Reset spring 43 and interior baffle 44, it is just to the spout of the one end of shrouding to inside extension, be provided with the apron on the port of spout, regulating plate 41 slides and sets up in the spout, it sets up on regulating plate 41 to adjust pole 42 one end, the other end passes the apron setting, interior baffle 44 sets up and serves in the stretching out of adjusting pole 42, reset spring 43 cover is located on adjusting pole 42, adopt the above-mentioned structure setting, then through the inner bearing structure who increases, realize reducing the quick impact of water pressure to first piston shrouding 20, form the restriction effect to first piston shrouding 20, improve the stability of rivers circulation.
The internal support mechanism further comprises a pressure regulator arranged in the inner chamber 40, the pressure regulator comprises a permanent magnet 50 arranged on the adjusting plate 41 and arranged opposite to the adjusting rod 42, an electromagnet 51 arranged on the inner wall of the adjusting air chamber 21 and opposite to the permanent magnet 50, and a pressure sensor 52 arranged on the internal baffle 44 and opposite to the second piston sealing plate 23, the magnetic pole of the permanent magnet 50 is set to be repulsive to the electromagnet 51 after being electrified, and the electromagnet 51, the pressure sensor 52, the first pressure detector 10 and the second pressure detector 11 are all electrically connected to the controller 6 Set up on adjusting the air chamber 21 inner wall and just to the electro-magnet 51 of permanent magnet 50 and set up on interior baffle 44 and just to the pressure sensor 52 of second piston shrouding 23, and set up the magnetic pole of permanent magnet 50 as repelling with the electro-magnet 51 after the circular telegram, electro-magnet 51, pressure sensor 52, first pressure detector 10 and the equal electric connection of second pressure detector 11 are on controller 6, the repulsion nature to permanent magnet 50 is formed in the cooperation of permanent magnet 50 structure and electro-magnet 51, thereby ensure the support to adjusting plate 41, improve good stability and regulation effect, therefore, the clothes hanger is strong in practicability, and is simple in structure.
The invention is further set that the inner diameter of the adjusting pipeline 2 is larger than that of the water inlet pipeline 1, and the inner diameter of the adjusting pipeline 2 is 1.5-2 times of that of the water inlet pipeline 1, by adopting the structure, because the inner diameter of the adjusting pipeline 2 is larger than that of the water inlet pipeline 1, the adjusting pipeline has a larger adjusting range and a smaller blocking range, because the adjusting pipeline 2 is provided with the first piston sealing plate 20, and the first piston sealing plate 20 is movable, when the blocking occurs, the range which can be impacted by water pressure is relatively larger, so that the anti-blocking effect of the water inlet pipeline 1 is improved, the practicability is strong, and the structure is simple.
The invention is further set that the volume of the accommodating cavity of the scavenging chamber 3 is larger than that of the adjusting pipeline 2, and the volume of the accommodating cavity of the scavenging chamber 3 is 1.5-2 times of that of the adjusting pipeline 2.
The invention is further arranged that an air outlet is arranged on the air exchanging chamber 3, a sealing plug 7 is arranged on the air outlet, and the sealing plug 7 is connected with the air outlet by screw threads.
Through the ventilation chamber 3 that sets up, then guarantee to adjust the interior atmospheric pressure of air chamber 21 and can the balanced circulation, guarantee moreover that the atmospheric density of adjusting the air chamber 21 is the same with ventilation chamber 3, the atmospheric pressure reduces in adjusting the air chamber 21, then can get into ventilation chamber 3 to the second piston shrouding 23 in adjusting the air chamber 21 can not overcome the atmospheric pressure of ventilation chamber 3 and reset, if need reset, only need open inlet channel 210 through electromagnetism on-off valve 213, make the atmospheric pressure of two rooms balanced.
In the initial configuration, the sealing plug 7 and the electromagnetic on-off valve 213 need to be opened to ensure that the air pressures in the ventilation chamber 3 and the adjustment air chamber 21 are in an equilibrium state and are at one atmosphere.
In the embodiment of the present invention, the circuit of the electromagnet 51 is not illustrated in detail in the drawings, and it is common knowledge for those skilled in the art that the electromagnet 51 generates magnetism after being energized, and the magnetism can be changed by changing the direction of the current.
A control method of an anti-clogging device adapted to the above irrigation water supply pump water inlet line 1, the controller 6 comprises a receiving unit for receiving electrical signals of the first pressure detector 10, the second pressure detector 11 and the pressure sensor 52; a comparison unit for comparing the pressures detected by the first pressure detector 10 and the second pressure detector 11; a control unit for controlling the positive and negative output currents of the pump motor and controlling the output magnitude of the current of the output electromagnet 51; a counting unit for counting the number of times the pressure sensor 52 detects the pressure; and start and stop the unit, is used for controlling electromagnetism break-make valve 213 break-make, motor start-stop and electromagnet 51 circuit to start and stop, is equipped with apart from the inductor between second piston shrouding 23 and the interior baffle 44, and controller 6 still includes the distance monitoring unit who is used for receiving second piston shrouding 23 position signal, includes following step:
s1, the irrigation water supply pump works normally, the first pressure detector and the second pressure detector detect the water pressure at two ends of the water inlet pipeline 1 in real time, the allowable floating value of the difference value of the detection values of the first pressure detector and the second pressure detector is set to be between 0 and PO in the comparison unit, and the counting value of the counting unit is a normal value between 5 and 10 times;
in the time periods of S2 and T1, the pressure detected by the first pressure detector 10 is P1, the pressure detected by the second pressure detector 11 is P2, the comparison unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, calculates the difference value between P1 and P2 as P, and whether P is between 0 and P0, and if so, continues to detect the pressures at the two ends of the water inlet pipeline 1; if not, increasing the torque of the motor through the control unit;
detecting whether the pressure sensor 52 detects pressure in the time periods S3 and T2, if the pressure is detected, the pressure detected by the first pressure detector 10 is measured as P3, the pressure detected by the second pressure detector 11 is measured as P4, the comparing unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P3 and P4 is calculated as P, whether P is between 0 and P0, and if the difference value is P, the rotating speed of the motor is increased through the control unit; if not, the control unit outputs reverse current, the motor rotates reversely, and the blockage is discharged;
s4, in a T3 time period after the rotating speed of the motor is increased through the control unit, the pressure detected by the first pressure detector 10 is measured as P5, the pressure detected by the second pressure detector 11 is measured as P6, the comparison unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P5 and P6 is calculated as P, whether P is between 0 and P0, and if the difference value is P, the rotating speed of the motor is increased through the control unit; if not, the control unit alternately performs positive rotation and negative rotation on the motor, grinds the blockage and dredges the pipeline;
in the time periods of S5 and T4, the counting unit counts the pressure detection times, the counted value is K, if K is less than 5 times or between 5 and 10 times, the current water quality environment of the pump is judged to be relatively normal, if K is more than 10 times, the current water quality environment of the pump is judged to be poor, an alarm is given, and a user needs to clean the water quality or switch the water quality to other water sources;
s6, when the pressure sensor 52 detects a pressure loss, the controller 6 opens the electromagnetic on-off valve 213 on the air inlet channel 210, so that the air pressure in the air chamber is equalized with the air pressure in the main chamber, and the second piston sealing plate 23 is reset under the action of the supporting spring 22;
s7, detecting the position of the second piston seal plate 23 when stressed, recording the maximum displacement value of the second piston seal plate 23 when stressed, keeping the maximum displacement value in the T5 time period, and closing the electromagnetic on-off valve 213 in the air inlet channel 210 all the time to enable the air chamber to be in the air outlet state all the time until the position of the second piston seal plate 23 reaches the maximum displacement value in the T4 time period; the current of the circuit of the electromagnet 51 is adjusted, so that the electromagnet 51 and the permanent magnet form a repellent state to limit the maximum displacement of the second piston sealing plate 23;
s8, looping steps S1-S5.
By adopting the technical scheme, the method has the advantages that the pressure at the two ends is detected by the adjusting pipeline 2 and the first pressure detector and the second pressure detector which are respectively arranged at the two ends of the water inlet channel, the pressure difference at the two ends tends to 0 in a constant state, but the pressure difference at the two ends is increased when blockage occurs, and the method adopts the two pressure detectors to judge whether the blockage occurs or not;
in addition, the method also comprises the steps that through the adjusting pipeline and the matching of the adjusting air chamber 21, when the position of the adjusting pipeline is blocked, the second piston sealing plate 23 in the adjusting pipeline moves inwards due to the impact of water pressure, and the moved position is maintained under the action of the adjusting air chamber 21, so that the blockage can have a large moving space, and the blockage can be discharged;
the method has various different conditions, firstly, the blockage can be loosened and has no tension, the detection means is that the blockage is sucked above the first piston sealing plate 20, if the pressure difference between two sides of the water inlet channel is between 0 and P0 after the first piston sealing plate 20 moves downwards, the blockage is judged to be grindable, and the blockage can be ground in a mode of increasing torque or driving a motor to rotate forwards and backwards; on the contrary, if the blockage is always located at the front section of the regulating channel, when the pressure difference between the two sides of the water inlet channel is greater than that between P0, and the position of the first piston sealing plate 20 does not move, or when the blockage is located above the first piston sealing plate 20, the water pressure difference does not change, it is determined that the blockage is a non-grindable and elastic condition, and the impeller needs to be driven reversely to discharge the blockage;
when meeting the above-mentioned condition, prevent blockking up the processing to the pump, easily realize the adaptation most environment at the in-process that uses.
The principle of the invention is that based on the working principle of the pump, the impeller is rotated at high speed, the central pressure of the impeller tends to vacuum, and then stronger suction force can be formed to a water source, when no blockage occurs, the pressure difference between the two side ends of the water inlet pipeline 1 is about 0, and of course, a certain difference exists, but when the blockage occurs, because the impeller part of the pump still forms a vacuum state, the pressure of the water inlet pipeline 1 is increased, and the pressure difference between the two sides is increased, the existence of the blockage is judged, the current state of the blockage is adjusted through the structure of the movable first piston seal plate 20, the pressure difference at two sides of the water inlet pipeline 1 is judged, the property of the blockage is judged, thereby carry out different forms's drive to the pump and adjust, improved the treatment effect to the plug, the practicality is strong, simple structure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.
Claims (8)
1. An anti-blocking device of a water inlet pipeline (1) of an irrigation water supply pump comprises a water inlet pipeline (1) and is characterized in that a first pressure detector (10) and a second pressure detector (11) are respectively arranged at two side ends of the water inlet pipeline (1), the water inlet pipeline (1) is connected with an adjusting mechanism which is arranged between the first pressure detector and the second pressure detector and used for blocking prevention, the adjusting mechanism comprises an adjusting pipeline (2) with one end communicated with the water inlet pipeline (1) and the other end in a closed state, a first piston sealing plate (20) which is arranged in the adjusting pipeline (2) and slides in a piston manner in the adjusting pipeline (2), an adjusting air chamber (21) which is connected with the adjusting pipeline (2) and connected with the first piston sealing plate (20), a supporting spring (22) sleeved outside the first piston sealing plate (20) and an adjusting assembly arranged in the adjusting air chamber (21) for adjusting air pressure, and a ventilation chamber (3) connected with the water inlet pipeline (1) is sleeved outside the adjusting pipeline (2), and the ventilation chamber (3) is communicated with the adjusting pipeline (2).
2. The anti-clogging device for the water inlet pipeline (1) of the irrigation water supply pump according to claim 1, wherein the adjusting assembly comprises a second piston sealing plate (23) connected with the adjusting air chamber (21) in a piston-type sliding manner and connected with the first piston sealing plate (20), an air inlet channel (210) and an air outlet channel (211) arranged on the adjusting air chamber (21), a one-way valve (212) arranged on the air outlet channel (211) and only used for air outlet, and an electromagnetic on-off valve (213) arranged in the air inlet channel (210).
3. An anti-clogging device for an irrigation water supply pump water inlet line (1) according to claim 1, characterized in that an inner supporting structure is also arranged in the adjusting air chamber (21) and used for limiting the limit moving distance of the second piston sealing plate (23), the inner support mechanism comprises an inner chamber (40) arranged in the adjusting air chamber (21), an adjusting plate (41), an adjusting rod (42), a return spring (43) and an inner baffle (44), one end of the sliding groove opposite to the sealing plate is provided with a sliding groove extending inwards, a cover plate is arranged on the port of the sliding groove, the adjusting plate (41) is arranged in the chute in a sliding way, one end of the adjusting rod (42) is arranged on the adjusting plate (41), the other end passes through the cover plate, the inner baffle (44) is arranged at the extending end of the adjusting rod (42), and the reset spring (43) is sleeved on the adjusting rod (42).
4. An anti-clogging device for the water inlet line (1) of an irrigation water supply pump according to claim 3, characterized in that said internal support means further comprises a pressure regulator disposed in the inner chamber (40), said pressure regulator comprising a permanent magnet (50) disposed on the regulating plate (41) opposite to the regulating rod (42), an electromagnet (51) disposed on the inner wall of the regulating air chamber (21) and facing the permanent magnet (50), and a pressure sensor (52) disposed on the internal baffle (44) and facing the second piston closing plate (23), and the magnetic pole of the permanent magnet (50) is set to repel the electromagnet (51) after being energized, said electromagnet (51), pressure sensor (52), first pressure detector (10) and second pressure detector (11) are all electrically connected to the controller (6).
5. An anti-clogging device for an irrigation water supply pump water inlet line (1) according to claim 1, characterized in that the inner diameter of the regulating line (2) is larger than the inner diameter of the water inlet line (1), and the inner diameter of the regulating line (2) is between 1.5 and 2 times the inner diameter of the water inlet line (1).
6. Anti-clogging device for an irrigation water supply pump water inlet line (1) according to claim 1, characterized in that the volume of the chamber of the air-exchange chamber (3) is larger than the volume of the chamber of the regulating line (2), and the volume of the chamber of the air-exchange chamber (3) is between 1.5 and 2 times the volume of the chamber of the regulating line (2).
7. The anti-clogging device for the water inlet pipe (1) of an irrigation water supply pump according to claim 6, characterized in that the air-exchanging chamber (3) is provided with an air outlet, the air outlet is provided with a sealing plug (7), and the sealing plug (7) and the air outlet are connected by a screw thread.
8. A method of controlling an anti-clogging device suitable for use in an irrigation water supply pump inlet line (1) according to any of the preceding claims 1-7, characterized in that said controller (6) comprises a receiving unit for receiving electrical signals from a first pressure detector (10), a second pressure detector (11) and a pressure sensor (52); a comparison unit for comparing the pressures detected by the first pressure detector (10) and the second pressure detector (11); the control unit is used for controlling the positive and negative output currents of the pump motor and controlling the output magnitude of the current of the output electromagnet (51); a counting unit for counting the number of times that the pressure sensor (52) detects the pressure; and start and stop the unit, be used for controlling electromagnetism break-make valve (213) break-make, motor start-stop and electromagnet (51) circuit to start and stop, be equipped with apart from the inductor between second piston shrouding (23) and interior baffle (44), controller (6) still including the distance monitoring unit that is used for receiving second piston shrouding (23) position signal, include following step:
s1, the irrigation water supply pump works normally, the first pressure detector and the second pressure detector detect the water pressure at two ends of the water inlet pipeline (1) in real time, the allowable floating value of the difference value of the detection values of the first pressure detector and the second pressure detector is set to be between 0 and PO in the comparison unit, and the counting value of the counting unit is a normal value between 5 and 10 times;
in the time periods of S2 and T1, the pressure detected by the first pressure detector (10) is P1, the pressure detected by the second pressure detector (11) is P2, the comparison unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P1 and P2 is calculated to be P, whether P is between 0 and P0 or not is judged, and if yes, the pressure at the two ends of the water inlet pipeline (1) is continuously detected; if not, increasing the torque of the motor through the control unit;
detecting whether the pressure sensor (52) detects pressure or not in the time period of S3 and T2, if the pressure is detected, the pressure meter detected by the first pressure detector (10) is P3, the pressure meter detected by the second pressure detector (11) is P4, the comparing unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P3 and P4 is calculated to be P, whether the P is between 0 and P0 or not is calculated, and if the P is detected, the rotating speed of the motor is increased through the control unit; if not, the control unit outputs reverse current, the motor rotates reversely, and the blockage is discharged;
s4, in a T3 time period after the rotating speed of the motor is increased through the control unit, the pressure meter detected by the first pressure detector (10) is P5, the pressure meter detected by the second pressure detector (11) is P6, the comparison unit compares the electric signals transmitted by the first pressure detector and the second pressure detector, the difference value between P5 and P6 is calculated to be P, whether P is between 0 and P0, and if yes, the rotating speed of the motor is increased through the control unit; if not, the control unit alternately carries out forward rotation and backward rotation on the motor, grinds the blockage and dredges the pipeline;
in the time periods of S5 and T4, the counting unit counts the pressure detection times, the counted value is K, if K is less than 5 times or between 5 and 10 times, the current water quality environment of the pump is judged to be relatively normal, if K is more than 10 times, the current water quality environment of the pump is judged to be poor, an alarm is given, and a user needs to clean the water quality or switch the water quality to other water sources;
s6, when the pressure sensor (52) detects that the pressure is lost, the controller (6) opens the electromagnetic on-off valve (213) on the air inlet channel (210) to enable the air pressure in the air chamber and the air pressure in the main chamber to be balanced, and the second piston sealing plate (23) is reset under the action of the supporting spring (22);
s7, detecting the position of the second piston seal plate (23) when the second piston seal plate is stressed by a position sensor, recording the maximum displacement value of the second piston seal plate (23) when the second piston seal plate is stressed, keeping the maximum displacement value in the T5 time period, and closing an electromagnetic on-off valve (213) in an air inlet channel (210) all the time to enable an air chamber to be in an air outlet state all the time until the position of the second piston seal plate (23) reaches the maximum displacement value in the T4 time period; the current of the circuit of the electromagnet (51) is adjusted, so that the electromagnet (51) and the permanent magnet form a repellent state to limit the maximum displacement of the second piston sealing plate (23);
s8, looping steps S1-S5.
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