CN111271299A

CN111271299A - Automatic control system of water pump

Info

Publication number: CN111271299A
Application number: CN202010207273.9A
Authority: CN
Inventors: 刘帮良; 孙伟; 林晨麒
Original assignee: Zhejiang Dayuan Pump Industry Co ltd
Current assignee: Zhejiang Dayuan Pump Industry Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-06-12

Abstract

The invention relates to the technical field of water pumps, in particular to an automatic control system of a water pump, which comprises a shell, wherein the shell is sequentially provided with a water inlet joint, a hydraulic assembly, a driving mechanism, a controller and a water outlet joint, water flow sequentially passes through a channel between a base and a shell of the hydraulic assembly and the driving mechanism and a channel between a driver seat and the shell of the controller after entering the water inlet joint, a power supply end and a controlled end of the driving mechanism are respectively connected with the controller, the water outlet joint is also provided with a pressure sensor, and a signal end of the pressure sensor is connected with a port corresponding to the controller. The invention has the advantages that: the driving mechanism and the controller are cooled by water, when the driving mechanism operates, pumped water rapidly passes through the channel between the base and the shell and the channel between the driver seat and the shell, and the heat of the driving mechanism and the controller is rapidly taken away.

Description

Automatic control system of water pump

Technical Field

The invention relates to the technical field of water pumps, in particular to an automatic control system of a water pump.

Background

In the prior art, the automatic deep well pump is mostly an external driver in the prior art, and because the deep well pump dives deeply, the distance between the driver and the water pump is too far away, and signal transmission appears unstably easily, leads to the water pump trouble.

In order to ensure the tightness of the controller and the driving mechanism, the controller is additionally provided with radiating fins, so that the controller is higher in cost, large in size and general in radiating effect.

Disclosure of Invention

In order to realize automatic starting and stopping of an automatic deep well pump with a built-in driver, the invention provides an automatic control system of a water pump.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a water pump automatic control system, includes the casing, the casing has set gradually into water festival, hydraulic power subassembly, actuating mechanism, controller, play water festival, and rivers enter into water festival after, the passageway of the driver seat and the shell of passageway, controller between hydraulic power subassembly, actuating mechanism's frame and the shell in proper order, actuating mechanism's power end and controlled end are connected with the controller respectively, still be provided with pressure sensor on the play water festival, pressure sensor's signal end and the port that the controller corresponds are connected.

Preferably, a filter screen is further arranged at the inlet of the water inlet joint.

Preferably, a through hole through which a rotating shaft of the driving mechanism penetrates is formed in the central axis of the hydraulic assembly, a first sand prevention ring is arranged on the outer edge of the through hole, and a first clamp spring is arranged at the end of the rotating shaft.

Preferably, the driving mechanism comprises an oil cylinder cover, a lower bearing seat, a machine base and a rotor, the oil cylinder cover, the lower bearing seat and the machine base form an oil chamber, a first mechanical sealing element is arranged in the middle of the oil cylinder cover, and a rotating shaft extending out of the rotor penetrates through the lower bearing seat and the oil cylinder cover to extend to a through hole of the hydraulic assembly; and a second sand prevention ring is arranged at the first mechanical sealing element through a clamp spring.

Preferably, a second mechanical sealing element is arranged on the lower bearing seat.

Preferably, the driving mechanism is a permanent magnet synchronous motor.

Preferably, the driving mechanism comprises an upper bearing seat, the outer edge of a bearing part of the upper bearing seat is fixed on a connecting part, and the connecting part is fixed on the inner side surface of the end part of the driver seat in a matching manner through a spigot and sealed through an O-shaped ring; and the electric signal and the power end of the driving mechanism are connected with the corresponding ports of the controller through sealing parts.

Preferably, the stator in the driving mechanism is fixed on the connecting part, and the upper end part of the rotor in the stator is connected with the middle part of the bearing part.

Preferably, the driver seat is matched with a spigot between the inner side wall of the end part close to the water outlet joint and the outer side wall of the water outlet joint, the end face of the controller facing the water outlet joint is in a sealing state, a pressure sensor mounting hole and a power supply signal wire penetrating hole are formed in the sealing face, and the sensing end of the pressure sensor is in contact with water flow in the water outlet joint, so that the water flow state is detected.

Preferably, a one-way valve is further arranged at the water outlet of the water outlet joint.

The invention has the advantages that:

(1) the driving mechanism and the controller are cooled by water, when the driving mechanism operates, pumped water rapidly passes through the channel between the base and the shell and the channel between the driver seat and the shell, and the heat of the driving mechanism and the controller is rapidly taken away.

(2) The water pump is of an inverted structure, namely the impeller is arranged below, the driving mechanism is arranged above, water pumped by the driving mechanism quickly passes through the driving mechanism and the outer wall of the controller to cool a motor consisting of a rotor and a stator in the driving mechanism, and the water inlet is arranged below and is closer to the lower part of the pool, so that the water can be pumped more thoroughly; the power cord gets into at the top, avoids getting into from the water pump middle section with ordinary well pump power cord, because of there being section cable conductor hug closely the shell, collides with the wall of a well and takes place the scraping when the installation is gone into the well.

(3) The arrangement of the first sand prevention ring can ensure that when the impeller is in high-speed shape transportation, solid particles mixed in water and the like cannot enter gaps between the impeller and other hydraulic components to cause the impeller to be blocked and incapable of running.

(4) The driving mechanism adopts the first mechanical sealing element and the second mechanical sealing element, so that double sealing is realized, the internal and external pressure difference between the inside of the motor and the outside can be effectively balanced when the deep well operates, and water leakage is reduced. And a second sand prevention ring is added at the front end of the mechanical seal, so that the mechanical seal can be protected from being impacted by water flow and impurities such as sand and the like mixed in the water flow when the water pump runs at a high speed.

(5) The invention adopts the permanent magnet synchronous motor, has variable frequency control, high efficiency and energy saving.

(6) The invention is provided with a built-in driver, and can realize the characteristics of constant-voltage water supply, automatic start and stop, wide-voltage operation, and no performance reduction during voltage reduction.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2-4 are three parts of the invention from water inlet joint to water outlet joint.

The notations in the figures have the following meanings:

1-shell 2-water inlet joint 21-filter screen 22-screw 23-shaft sleeve 24-rubber bearing

3-hydraulic component 30-hydraulic shell 31-first sand control ring 32-first snap spring

33-guide vane 34-cover plate 35-impeller

4-driving mechanism 41-engine base 42-oil cylinder cover 421-first mechanical sealing element

43-lower bearing seat 431-second mechanical sealing element 44-second sand control ring 45-second snap spring

46-rotor 461-rotating shaft 47-stator

48-upper bearing seat 481-bearing portion 482-connecting portion

5-controller 51-driver seat 510-sealing surface 52-pressure sensor

6-water outlet joint 61-one-way valve 62-cable

Detailed Description

As shown in fig. 1-4, an automatic control system for a water pump comprises a housing 1, wherein water flows through a water inlet joint 2, a hydraulic assembly 3, a base 41 and a housing 1 channel of a driving mechanism 4, a driver seat 51 and a housing 1 channel of a controller 5, and a water outlet joint 6 which are arranged in the housing 1 in sequence. The water outlet joint 6 is further provided with a pressure sensor 52, the pressure sensor 52 is used for detecting the water pressure of the outlet water, and a signal end of the pressure sensor 52 is connected with a corresponding pin of the controller 5. In this embodiment, the driving mechanism 4 is a permanent magnet synchronous motor in which the rotating shaft 461 of the rotor 46 passes through the center of the hydro-assembly 3.

The tip cover of pivot 461 has axle sleeve 23 and centers through the rubber bearing 24 on the water inlet section 2, axle sleeve 23 and rubber bearing 24 clearance fit mainly prevent that the axle from rocking when moving. The outer side surface of the water inlet joint 2 is also provided with a filter screen 21 for filtering sediment. After the driving mechanism 4 and the water inlet joint are sleeved in the base 41, and then the water outlet joint 6, the driver base 51 and the base 41 are all pressed into the shell 1, the screw 22 is fixed on the shell 1, so that all the components are inversely installed in the shell 1.

The inlet end of the hydraulic shell 30 of the hydraulic component 3 is matched with the spigot of the water inlet joint 2, and the outlet end is matched with the spigot of the oil cylinder cover 42 of the driving mechanism 4. The hydraulic shell 30 of the hydraulic assembly 3 comprises a plurality of groups of guide vanes 33, cover plates 34 and impellers 35 which are arranged in sequence, so that high sand passing performance is realized, and blocking is prevented. The number of the guide vanes 33 and the impellers 35 is not fixed, and the number of the guide vanes and the impellers is different along with different power. The water is driven to the oil cylinder cover 42 in the driving mechanism 4 by the rotating shaft 461 of the driving mechanism 4. The through hole that pivot 461 passed is provided with on hydraulic assembly 3's the axis, be provided with first sand control circle 31 on the outward flange of through hole, first jump ring 32 sets up the tip at pivot 461, plays the effect of injecing first sand control circle 31, prevents like this that the silt that brings into from water inflow 2 department rivers from flowing into in the bearing and influencing pivot 461 and rotate.

The middle part of the cylinder head 42 is provided with a first mechanical seal 421 for preventing water from flowing into an oil chamber formed by the cylinder head 42 and the lower bearing seat 43. The rotating shaft 461 passes through the lower bearing seat 43 and the cylinder cover 42 and extends to the through hole of the hydraulic assembly 3. The first mechanical seal 421 is further provided with a second sand prevention ring 44 through a second clamp spring 45, and then flows around the driving mechanism 4, i.e. flows between the outer side surface of the base 41 of the driving mechanism 4 and the inner side wall of the housing 1. For double protection, a second mechanical seal 431 is provided on the lower bearing seat 43. A stator 47 matched with the rotor 46 is arranged in the base 41, and a rotating shaft 461 of the rotor 46 passes through an oil chamber to be used as a driving end of the driving mechanism 4.

The driving mechanism 4 further comprises an upper bearing seat 48, the outer edge of a bearing portion 481 of the upper bearing seat 48 is fixed on a connecting portion 482, and the connecting portion 482 is fixed on the inner side surface of the end portion of the driver seat 51 in a matching manner through a spigot and sealed through an O-shaped ring; the stator 47 in the drive mechanism 4 is fixed to the connecting portion 482, and the upper end portion of the rotor 46 in the stator 47 is connected to the middle of the bearing portion 481. The electric signal and the power end of the driving mechanism 4 are connected with the corresponding ports of the controller 5 through sealing parts. The permanent magnet synchronous motor operates in a frequency conversion mode according to the output instruction of the controller 5, can operate at a high rotating speed which is far higher than that of a common alternating current asynchronous motor, and can save the quantity of silicon steel sheets of the motor. Under the same power condition, the motor rotating speed is improved, the number of the impellers 35 can be reduced, and the water pump is smaller and lighter.

The inner side wall of the end part of the driver seat 51 of the controller 5 close to the water outlet joint 6 is matched with the upper stop of the outer side wall of the water outlet joint 6 close to the water inlet end, and is sealed through an o-shaped ring. The end surface of the controller 5 facing the water outlet joint 6 is in a sealed state, a cable 62 consisting of a mounting hole of the pressure sensor 52 and a power signal wire is arranged on the sealing surface 510 to pass through the hole, and the sensing end of the pressure sensor 52 is contacted with the water flow in the water outlet joint 6, so that the water flow state is detected. And a one-way valve 61 is also arranged at the water outlet of the water outlet joint 6 to ensure that water at the water outlet joint 6 flows in a one-way manner. And the outer side wall of the water outlet joint 6 close to the water outlet end is matched with a spigot between the inner side wall of the shell 1 and is sealed by an o-shaped ring.

The controller 5 is internally provided with a circuit board, parameters (voltage, current, counter electromotive force, pressure sensor signals and the like) fed back when the water pump operates are collected and controlled through the programmable logic controller, the pressure value change in the pump cavity is accurately collected through the high-precision pressure sensor, the self-learning logic algorithm is adopted, the operation of the water pump is recorded and analyzed in real time, the water pressure value in the use environment of the water pump can be automatically suitable, and the control result which best meets the use requirements of a user is obtained. Compared with the traditional product, the method is no longer restricted by preset parameters, and can be adapted to self-learning according to the use environment; the traditional flow switch structure is cancelled, only the on-off pressure sensor 52 is used for collecting information and feeding back motor data, the running state of the water pump is judged through the operation processing of the controller 5, intelligent control services such as shutdown of a water outlet valve and shutdown of a leakage pipeline valve are provided, and the defects that the traditional flow switch is volatile and difficult to control in bad water quality are avoided.

The automatic control system of the water pump is controlled by an internally mounted controller.

1. When the water pump is in a waterless environment, the automatic shutdown protection can automatically detect whether the periphery is in a water environment again or not, and if so, the normal operation is restarted;

2. when the water outlet valve is closed, the water outlet valve can be automatically shut down for protection through calculation, analysis and identification; the pressure of the pipeline is monitored in real time through a built-in pressure sensor, and the pipeline is automatically started to operate when the pressure is smaller than a condition value.

3. The self-adaptive operation environment can automatically change the operation frequency of the motor to influence the output of the water pump according to the actual condition of the feedback value of the pressure sensor so as to meet the requirement of constant-pressure water supply.

The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a water pump automatic control system, its characterized in that, includes the casing, the casing has set gradually into water festival (2), hydraulic power subassembly (3), actuating mechanism (4), controller (5), goes out water festival (6), and rivers enter into water festival (2) back, pass through the passageway between base (41) and the shell (1) of hydraulic power subassembly (3), actuating mechanism (4) in proper order, the passageway of driver seat (51) and shell (1) of controller (5), the power end and the controlled end of actuating mechanism (4) are connected with controller (5) respectively, still be provided with pressure sensor (52) on going out water festival (6), the signal end and the port that controller (5) correspond of pressure sensor (52) are connected.

2. The automatic control system of a water pump according to claim 1, characterized in that a filter screen (21) is further arranged at the inlet of the water inlet joint (2).

3. The automatic control system of the water pump as claimed in claim 2, wherein a through hole through which the rotating shaft (461) of the driving mechanism (4) passes is arranged on a central axis of the hydraulic assembly (3), a first sand prevention ring (31) is arranged on an outer edge of the through hole, and the first snap spring (32) is arranged at an end part of the rotating shaft (461).

4. The automatic control system of the water pump according to claim 3, characterized in that the driving mechanism (4) comprises an oil cylinder cover (42), a lower bearing seat (43), a base (41) and a rotor (46), the oil cylinder cover (42), the lower bearing seat (43) and the base (41) form an oil chamber, a first mechanical seal (421) is arranged in the middle of the oil cylinder cover (42), and a rotating shaft (461) extending out of the rotor (46) penetrates through the lower bearing seat (43) and the oil cylinder cover (42) and extends to a through hole of the hydraulic assembly (3); and a second sand control ring (44) is arranged at the first mechanical sealing element (421) through a clamping spring.

5. An automatic control system for a water pump according to claim 4, characterized in that a second mechanical seal (431) is provided on the lower bearing seat (43).

6. The automatic control system of claim 4, wherein the driving mechanism is a permanent magnet synchronous motor.

7. An automatic control system for a water pump according to claim 5, characterized in that the drive mechanism (4) comprises an upper bearing seat (48), the outer edge of the bearing portion (481) of the upper bearing seat (48) is fixed on the connecting portion (482), the connecting portion (482) is fixed on the inner side surface of the end portion of the drive seat (51) through a spigot fit and is sealed by an O-ring; the electric signal and the power end of the driving mechanism (4) are connected with the corresponding port of the controller (5) through a sealing element.

8. An automatic control system for a water pump according to claim 7, characterized in that the stator (47) in the driving mechanism (4) is fixed on the connecting portion (482), and the upper end portion of the rotor (46) in the stator (47) is connected with the middle portion of the bearing portion (481).

9. The automatic control system of the water pump is characterized in that a spigot fit is formed between the inner side wall of the end portion, close to the water outlet joint (6), of the driver seat (51) and the outer side wall of the water outlet joint (6), the end face, facing the water outlet joint (6), of the controller (5) is in a sealing state, a pressure sensor (52) mounting hole and a power signal wire penetrating hole are formed in a sealing surface (510), and a sensing end of the pressure sensor (52) is in contact with water flow in the water outlet joint (6) so as to detect the water flow state.

10. The automatic control system of the water pump according to claim 8, characterized in that a check valve (61) is further arranged at the water outlet of the water outlet joint (6).