CN217029336U - Submersible pump with extensible collecting head - Google Patents

Abstract

The utility model discloses a submersible pump with an extensible collecting head, which comprises a pump body, a water pump shield, a thread sheath and the collecting head, wherein the pump body is hermetically connected with the water pump shield; the water pump shield is detachably connected with the collecting head; the motor and the motor controller are arranged in the closed inner cavity of the inner pipe, the motor drives the water pump impeller to rotate, water is sucked into a closed gap between the inner pipe and the outer pipe of the pump body, and then the water flows out of a drainage passage in an end cover of the outer pipe. A protective body, a water outlet nozzle of the water pump shield, a water outlet nozzle of the collecting head, an end cover of the collecting head and a hose can be additionally arranged between the water pump shield and the collecting head, so that the depth of a water source is prolonged. The utility model has the advantages of low disturbance, high lift, fast water outlet, adjustable flow, small volume of the submersible pump and convenient use. The method is very suitable for sampling volatile and semi-volatile organic compounds.

Description

Immersible pump with extensible collecting head

Technical Field

The utility model relates to a submersible pump, in particular to a submersible pump with an extensible collecting head, and belongs to the technical field of underground water collecting devices.

Background

At present, the foundation of the underground water monitoring technology is very weak, and the underground water environment monitoring and sampling are basically in a blank state. The new standards and specifications have particular provisions for sampling light non-aqueous phase (LNAPL), heavy non-aqueous phase (DNAPL), VOCs, and require low disturbance levels for water vibration noise. The aperture of the environment monitoring well is generally about 50 mm-100 mm, and an industrial pump cannot be installed because of the large aperture. The existing domestic underground water sampling equipment does not consider the basic characteristics of underground water, is not designed by taking underground water quality sampling as a monitoring target, cannot meet the requirements of sampling flow and leakage and drop, and cannot meet the requirements of sampling representativeness and precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a submersible pump with an extensible collecting head.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the submersible pump with the extendable collecting head comprises a pump body, a water pump shield and the collecting head, wherein the pump body is hermetically connected with the water pump shield; the water pump shield is detachably connected with the collecting head; the pump body comprises an outer pipe, an inner pipe, an outer pipe end cover, a motor controller, a motor and a water pump impeller; the diameter of the outer pipe is larger than that of the inner pipe; the outer pipe end cover is in a second-order step shape; the first step is close to the outer end face of the outer tube end cover, and the diameter of the first step is matched with that of the outer tube; the outer end face of the second step, which is far away from the end cover of the outer pipe, is matched with the diameter of the inner pipe; the outer end face of the outer tube end cover is provided with a water outlet hole and a wire outlet hole; more than one water inlet hole for entering the outer pipe end cover is formed in the side wall of the second step; the water inlet hole and the water outlet hole of the outer pipe end cover are communicated to form a water drainage channel; the inner end face of the outer tube end cover is provided with more than 1 wire inlet hole; the wire outlet hole is communicated with each wire inlet hole to form a wire channel; the line channel is isolated from the drainage channel; the outer pipe is hermetically connected with the first step of the outer pipe end cover through an outer pipe sealing ring; one end of the inner pipe is hermetically connected with a second step of the outer pipe end cover through an inner pipe upper sealing ring; the other end of the inner tube is hermetically connected with a motor through a lower sealing ring of the inner tube to form a sealed inner cavity; the motor is connected with the motor controller through a motor wire; the motor controller is arranged in the inner cavity, and a power supply input line of the motor controller penetrates out of the closed inner cavity through the wire inlet hole and is led out through the line channel; the water pump impeller is arranged on a motor shaft and driven by the motor to rotate; the motor shaft is hermetically connected with the motor shell; a conical surface matched with the water pump impeller is arranged in one end of the water pump protective cover, and a through hole is formed in the bottom of the conical surface; the collecting head comprises a collecting head side wall, a filter screen end cover and a water inlet filter screen; more than one collecting head water inlet hole is formed in the side wall of the collecting head; the diameter of the water inlet filter screen is matched with the inner diameter of the side wall of the collecting head, and the water inlet filter screen is arranged on the inner side of the side wall of the collecting head and shields water inlet holes of the collecting head; the diameter of the filter screen end cover is matched with the inner diameter of the side wall of the collecting head, and the bottom end of the collecting head is closed.

Further, the water pump shield is in threaded connection with the side wall of the collecting head; the water pump shield is provided with external threads, and the side wall of the collecting head is provided with internal threads; the side wall of the collecting head is uniformly distributed with collecting head water inlet holes; the bottom of the side wall of the collecting head extends inwards to form an annular edge; the diameter of the filter screen end cover is matched with the inner diameter of the side wall of the collecting head; the water inlet filter screen is tightly attached to the side wall of the collecting head, and the filter screen end cover is tightly pressed on the annular edge of the side wall of the collecting head.

Further, the submersible pump with the extendable collecting head further comprises a motor temperature collector, and the motor temperature collector is installed in the inner cavity; collecting the shell temperature of the motor, and transmitting the collected temperature signal to the motor controller; the motor controller adjusts the rotation speed of the motor according to the temperature signal.

Further, the submersible pump with the extensible collecting head further comprises an inlet wire sealing pressing cover and a water level sensor; the incoming line sealing pressing cover is provided with more than 1 power supply input line hole corresponding to the incoming line hole, and an incoming line sealing ring is arranged in each power supply input line hole; the outer pipe end cover is provided with a water level sensor mounting through hole; the water level sensor is arranged in the water level sensor mounting through hole, a lead of the water level sensor enters the inner cavity through the circuit channel and is connected with the motor controller, and the motor controller controls the starting and stopping of the motor according to the water level collected by the water level sensor.

Furthermore, the submersible pump with the extensible collecting head further comprises a threaded sheath, a water inlet nozzle of a water pump shield, a water outlet nozzle of the collecting head, a collecting head end cover and a supporting piece; the water inlet nozzle of the water pump shield is arranged in the through hole and is detachably connected with the threaded sheath; the threaded sheath is a bottomless cylinder matched with the water pump shield, the diameter of the threaded sheath is matched with the outer pipe, and the threaded sheath is detachably connected with the water pump shield; the diameter of the collecting head end cover is matched with that of the side wall of the collecting head and is detachably connected with the collecting head end cover; the outer end face of the collecting head end cover is provided with a support piece and a collecting head water outlet nozzle; the water outlet nozzle of the collecting head is connected with the water inlet nozzle of the water pump shield through a hose.

Furthermore, the water pump protective cover is in threaded connection with the threaded protective cover; the water pump shield is provided with external threads; the thread sheath is provided with internal threads; the water inlet nozzle of the water pump protective cover is in threaded connection with the water pump protective cover; the collecting head end cover is in threaded connection with the side wall of the collecting head; the collecting head end cover is provided with external threads; the side wall of the collecting head is uniformly distributed with collecting head water inlet holes; the bottom of the side wall of the collecting head extends inwards to form an annular edge; the diameter of the filter screen end cover is matched with the inner diameter of the side wall of the collecting head; the water inlet filter screen is tightly attached to the side wall of the collecting head, and the filter screen end cover is tightly pressed on the annular edge of the side wall of the collecting head.

Furthermore, the submersible pump with the extensible collecting head further comprises an inlet wire sealing pressing cover and a water level sensor; the incoming line sealing pressing cover is provided with more than 1 power supply input line hole corresponding to the incoming line hole, and an incoming line sealing ring is arranged in each power supply input line hole; the outer pipe end cover is provided with a water level sensor mounting through hole; the water level sensor is arranged in the water level sensor mounting through hole, a lead of the water level sensor enters the inner cavity through the circuit channel and is connected with the motor controller, and the water level sensor is arranged in the water level sensor mounting through hole.

Furthermore, the submersible pump with the extendable collecting head further comprises a motor temperature collector which is arranged in the inner cavity; collecting the shell temperature of the motor, and transmitting the collected temperature signal to the motor controller; and the motor controller adjusts the rotating speed of the motor according to the temperature signal.

Furthermore, the submersible pump with the extendable collecting head further comprises a threaded sheath, a water inlet nozzle of a water pump shield, a water outlet nozzle of the collecting head, a collecting head end cover and a support piece; the water inlet nozzle of the water pump shield is arranged in the through hole and is detachably connected with the threaded sheath; the thread sheath is a barrel matched with the water pump shield, and the bottom of the thread sheath is provided with a hole matched with the water inlet nozzle of the water pump shield; the diameter of the water pump is matched with that of the outer pipe and is detachably connected with the water pump protective cover; the water inlet nozzle of the water pump shield penetrates through a hole in the bottom of the threaded sheath; the diameter of the collecting head end cover is matched with that of the side wall of the collecting head and is detachably connected with the collecting head end cover; the outer end face of the collecting head end cover is provided with a support piece and a collecting head water outlet nozzle; the water outlet nozzle of the collecting head is connected with the water inlet nozzle of the water pump shield through a hose.

Furthermore, the submersible pump with the extensible collecting head further comprises a control unit, a display module, a positioning module, a communication module, a flow detection module, an operation module, a DC/DC converter, a power supply module, a leakage and drop module, a temperature collecting module and a water level detecting module; the power supply module comprises an AC/DC conversion circuit;

the control unit is bidirectionally connected with the positioning module, the communication module, the flow detection module and the leakage and descent module; the corresponding input ends of the control unit are respectively connected with the corresponding output ends of the operation module and the power supply module, and the corresponding output ends of the control unit are respectively connected with the corresponding input ends of the display module and the DC/DC converter; the corresponding input end of the motor controller is respectively connected with the corresponding output ends of the DC/DC converter, the temperature acquisition module and the water level detection module, and the corresponding output end of the motor controller is connected with the control end of the motor;

the water level detection module receives a water pressure signal acquired by the pressure sensor, analyzes the water level and the burial depth to obtain the water level and the burial depth, and controls the starting and stopping of the motor through the motor controller according to the water level and the burial depth;

the temperature acquisition module acquires the temperatures of the motor controller and the motor shell through the thermistor, the temperature of the motor controller and the temperature of the motor shell are transmitted to the motor controller, and the motor controller controls the rotating speed of the motor according to the temperature of the motor controller and the temperature of the motor shell.

By adopting the technical scheme, the utility model has the beneficial effects that:

(1) the motor has no vibration when the device is used, and has low disturbance to a water body.

(2) The utility model has high lift, the conventional lift is 70 meters, the lift can reach 300 meters or even deeper, and the performance is excellent.

(3) The collecting head can use the hose to prolong the depth of the collected water source, and is very convenient to extend the sampling distance.

(4) The submersible pump is designed to be a single impeller, so that the volume of a pump body is reduced, and the design complexity and the manufacturing cost are reduced.

(5) The utility model has various flow rates, and the flow rate can be adjusted according to the requirement.

(6) The pump body is made of 316 stainless steel and is corrosion-resistant.

(7) The utility model is provided with the water level detection module, has the function of idle rotation prevention and self protection, and prevents the pump from being burnt.

(8) The water inlet of the collecting head is provided with the filter screen, so that large-particle impurities are prevented from entering and blocking a water pump.

(9) The utility model has the advantages of less faults, long service life and low maintenance cost.

(10) The utility model has compact structure, fast water outlet and small floor area.

Drawings

FIG. 1 is a structural view of embodiment 1 of the present invention;

FIG. 2 is a block circuit diagram of the present invention;

FIG. 3 is a schematic circuit diagram of a motor controller, a temperature acquisition module, and a water level detection module according to embodiment 1 of the present invention;

FIG. 4 is a structural view of embodiment 2 of the present invention;

FIG. 5 is an assembly view of embodiment 2 of the present invention;

fig. 6 is a sectional view of a water pump shroud in embodiment 1 of the utility model;

FIG. 7 is a sectional view of a threaded sheath according to embodiment 2 of the present invention;

FIG. 8 is a cross-sectional view of a side wall of a pick head in accordance with example 2 of the present invention;

in the figure: 1. lifting ring screws, 2, a water outlet, 3, an outer pipe sealing ring, 4, an outer pipe end cover, 5, an outer pipe end cover water inlet, 6, an inner pipe upper sealing ring, 7, an inlet wire sealing ring, 8, a power input wire hole, 9, an inlet wire sealing pressing cover, 10, a power input wire, 11, a motor controller, 12, a motor wire, 13, a motor temperature collector, 14, a motor, 15, an inner pipe lower sealing ring, 16, a motor shaft, 17, a water pump impeller, 18, an inner pipe, 19, an outer pipe, 20, a water pump shield, 21, a water pump shield external thread, 22, a water pump shield inlet nozzle, 23, a thread sheath, 24, a collection head water outlet nozzle, 25, a support piece, 26, a collection head end cover external thread, 27, a collection head end cover, 28, a collection head side wall, 29, a collection head water inlet hole, 30, a water inlet filter screen, 31, a filter screen end cover, 32, a conical surface, 33, a thread sheath internal thread, 34. internal threads of the collecting head 35 and a hose.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

Referring to fig. 1 to 8, the embodiment of the present invention is:

example 1:

a submerged pump with an extensible collecting head comprises a pump body, a water pump shield 20 and the collecting head, wherein the pump body is hermetically connected with the water pump shield 20; the water pump shield 20 is detachably connected with the collecting head; the pump body comprises an outer pipe 19, an inner pipe 18, an outer pipe end cover 4, a motor controller 11, a motor 14 and a water pump impeller 17; the diameter of the outer pipe 19 is larger than that of the inner pipe 18; the outer tube end cover 4 is in a second-order step shape; the first step is close to the outer end face of the outer tube end cover 4, and the diameter of the first step is matched with that of the outer tube 19; the second step is far away from the outer end face of the outer tube end cover 4, and the diameter of the second step is matched with that of the inner tube 18; the outer end face of the outer tube end cover 4 is provided with a water outlet hole 2 and a wire outlet hole; more than one outer pipe end cover water inlet hole 5 is formed in the side wall of the second step; the water inlet holes 5 of the end covers of the outer pipes are communicated with the water outlet holes to form a water drainage channel; the inner end face of the outer tube end cover 4 is provided with more than 1 wire inlet hole; the wire outlet hole is communicated with each wire inlet hole to form a wire channel; the line channel is isolated from the drainage channel; the outer pipe 19 is hermetically connected with the first step of the outer pipe end cover 4 through an outer pipe sealing ring 3; one end of the inner tube 18 is hermetically connected with the second step of the outer tube end cover 4 through an inner tube upper sealing ring 6; the other end of the inner tube is hermetically connected with a motor 14 through an inner tube lower sealing ring 15 to form a sealed inner cavity; the motor 14 is connected with the motor controller 11 through a motor wire 12; the motor controller 11 is arranged in the inner cavity, and a power supply input line 10 of the motor controller penetrates out of the closed inner cavity through the line inlet hole and is led out through the line channel; the motor shaft 16 is hermetically connected with the motor shell; the water pump impeller 17 is arranged on the motor shaft 16 through a motor shaft sealing ring and is driven by the motor 14 to rotate; a conical surface 32 matched with the water pump impeller 17 is arranged in one end of the water pump protective cover 20, and a through hole is formed in the bottom of the conical surface 32; the collecting head comprises a collecting head side wall 28, a filter screen end cover 31 and a water inlet filter screen 30; the side wall 28 of the collecting head is provided with more than one collecting head water inlet hole 29; the diameter of the water inlet filter screen 30 is matched with the inner diameter of the side wall 28 of the collecting head, and the water inlet filter screen is arranged on the inner side of the side wall 28 of the collecting head and shields the water inlet holes 29 of the collecting head; the pick head water inlet holes 29 on the pick head side wall 28 are evenly distributed; the bottom of the pick head sidewall 28 extends inwardly to form an annular rim; the diameter of the screen end cap 31 is adapted to the inner diameter of the pick head sidewall 28; the water intake screen 30 is attached to the pick head side wall 28, and the screen end cap 31 is pressed against the annular edge of the pick head side wall 28 to close the bottom end of the pick head.

The submersible pump with the extendable collecting head further comprises a motor temperature collector 13, the motor temperature collector 13 is installed in the inner cavity, collects the shell temperature of a motor 14, and transmits a collected temperature signal to the motor controller 11; the motor controller 11 adjusts the rotation speed of the motor 14 according to the temperature signal.

The submersible pump with the extendable collecting head further comprises an inlet wire sealing pressing cover 9; the incoming line sealing pressing cover 9 is provided with power supply input line holes 8 corresponding to the incoming line holes, and incoming line sealing rings 7 are arranged in the power supply input line holes 8; the submersible pump with the extendable collecting head further comprises a water level sensor; the outer pipe end cover 4 is provided with a water level sensor mounting through hole; the water level sensor is arranged in the water level sensor mounting through hole, a lead of the water level sensor enters the inner cavity through the circuit channel and is connected with the motor controller 11, and the motor controller controls the starting and stopping of the motor according to the water level collected by the water level detection module.

In this embodiment, the water pump protective cover 20 is welded with the pump body, the water pump protective cover 20 is in threaded connection with the collecting head side wall 28, the water pump protective cover 20 is provided with external threads, the collecting head side wall 28 is provided with internal threads, the outer end face of the outer pipe end cover 4 is provided with a lifting ring screw 1 for fixing a steel wire rope, and the steel wire rope is used for bearing the weight of the submersible pump with the extensible collecting head; and the motor shaft 16 is hermetically connected with the motor shell through a sealing ring.

The submersible pump with the detachable collecting head further comprises a control unit, a display module, a positioning module, a communication module, a flow detection module, an operation module, a DC/DC converter, a power supply module, a leakage and drop module, a temperature collecting module and a water level detecting module; the power supply module comprises an AC/DC conversion circuit;

the control unit is bidirectionally connected with the positioning module, the communication module, the flow detection module and the leakage and descent module; the corresponding input ends of the control unit are respectively connected with the corresponding output ends of the operation module and the power supply module, and the corresponding output ends of the control unit are respectively connected with the corresponding input ends of the display module and the DC/DC converter; the corresponding input end of the motor controller is respectively connected with the corresponding output ends of the DC/DC converter, the temperature acquisition module and the water level detection module, and the corresponding output end of the motor controller is connected with the control end of the motor 14.

The water level detection module receives a water pressure signal acquired by the pressure sensor, analyzes the water level and the burial depth to obtain the water level and the burial depth, and controls the starting and stopping of the motor through the motor controller according to the water level and the burial depth.

In the embodiment, the flow detection module is a flow meter, and the leakage and drop module is a leakage and drop instrument; the flowmeter and the leakage and drop instrument are respectively connected with corresponding input ports of the control unit. When the flow is lower than the preset flow threshold, the control unit controls the rotating speed of the motor through the DC/DC converter and the motor controller.

The motor controller comprises a CPU, more than 1 MOS tube special driving chip U2, a field effect tube Q1-Q6, a resistor R2-R4, a U-phase current acquisition chip U3, a V-phase current acquisition chip U4 and a W-phase current acquisition chip U5; in this embodiment, the number of the MOS transistor dedicated driver chips U2 is 1.

The drain electrode of the field effect transistor Q1 is connected with the source electrode of the field effect transistor Q4; the source electrode of the field effect transistor Q1 is connected with a power supply, and the drain electrode of the field effect transistor Q4 is grounded; the drain electrode of the field effect transistor Q2 is connected with the source electrode of the field effect transistor Q5; the source electrode of the field effect transistor Q2 is connected with a power supply, and the drain electrode of the field effect transistor Q5 is grounded; the drain electrode of the field effect transistor Q3 is connected with the source electrode of the field effect transistor Q6; the source electrode of the field effect transistor Q3 is connected with a power supply, and the drain electrode of the field effect transistor Q6 is grounded; the U, V, W terminal of the motor 14 is respectively connected with the drain electrodes of the field effect transistors Q1-Q3 through resistors R2-R4;

the input ends of the U-phase current acquisition chip U3, the V-phase current acquisition chip U4 and the W-phase current acquisition chip U5 are respectively connected with the two ends of the resistors R2-R4, and the output ends of the U-phase current acquisition chip U4 and the W-phase current acquisition chip U5 are respectively connected with the corresponding input ends of the CPU; the grids of the field effect transistors Q1-Q6 are respectively connected with corresponding terminals of a special drive chip U2 of the MOS transistor; the MOS tube special driving chip U2 is connected with the corresponding terminal of the CPU.

The temperature acquisition module comprises a temperature acquisition probe T2, a resistor R5, a resistor R1, a capacitor C2, a capacitor C1 and a thermistor NTC T1; the temperature acquisition probe T2 is connected with a capacitor C2 in parallel, one end of the temperature acquisition probe is connected with a power supply through a resistor R5, and the other end of the temperature acquisition probe is grounded; the resistor R1 is connected in parallel with the capacitor C1, one end of the resistor R is connected with a power supply through the thermistor NTC T1, and the other end of the resistor R is grounded.

The water level detection module comprises a water level probe K1, resistors R6-R9 and triodes Q7-Q8; the base electrode of the triode Q7 is connected with the water level probe K1 through a resistor R8, and the collector electrode is grounded through a resistor R9; the emitter is connected with a power supply; the collector of the triode Q8 is connected with the power supply through the resistor R7, the emitter of the triode Q8 is grounded, and the base of the triode Q7 is connected with the collector of the triode Q7; the resistor R6 is connected between the base and emitter of the transistor Q7, and the collector of the transistor Q8 is connected to the corresponding terminal of the CPU.

The water layer leakage and falling depth is monitored in the sampling process by arranging the leakage and falling instrument and the submersible pump in the same water layer. According to the requirements of sampling and launching the sample, the drainage depth and speed cannot exceed the values specified by the standard, otherwise, the disturbance of the water body is caused, and the deviation of the sampled data is large. This is particularly evident when volatile and semi-volatile materials are present in the water.

And monitoring the flow of the underground water pumped to the ground, and feeding back flow data to the control unit to realize constant flow sampling.

The water level gauge is installed in the immersible pump among this embodiment, detects whether there is water, and it is very convenient to use. And feeding the monitoring information back to a control unit, wherein the control unit can judge whether the current water layer contains water or not, start a water pump to work when the current water layer contains water, and control a motor controller to stop the water pump to run if the current water layer does not contain water. Therefore, the submersible pump can be prevented from idling for a long time and damaging the motor. When the control unit detects that no water exists, the control display unit sends alarm information to prompt a user to process.

The water level meter can be extended by a line and positioned at the same position with the collecting head to collect pressure difference and calculate the depth of collecting the water layer.

The positioning module is matched with the communication module to send the longitude and latitude and the acquired data to the data platform. The data system is uploaded with latitude and longitude, so that sampling personnel can be prevented from counterfeiting.

In this embodiment, the CPU is STM32F405RGT6, the MOS transistor dedicated driving chip U2DRV8301, the U-phase current acquisition chip U3, the V-phase current acquisition chip U4, and the W-phase current acquisition chip are all U5AD 8418.

When the submersible pump works, the motor 14 drives the water pump impeller 17 to rotate through the motor shaft 16, underground water is filtered by the water inlet filter screen 30 and then enters the collecting head through the collecting head water inlet hole 29, flows into a gap between the inner pipe and the outer pipe 19 through the through hole at the bottom of the conical surface 32, and then flows out of the submersible pump from the water outlet hole 2 through the drainage passage. The water pump impeller 17 is designed as a single impeller, so that the volume of the pump body is reduced, and the design complexity and the manufacturing cost are reduced. The water inlet filter screen 30 can prevent large particle impurities from entering, so that the water pump is prevented from being blocked by the large particle impurities. The sampling water depth of the embodiment can reach 70 meters, which is larger than the existing products at home and abroad.

The motor 14 in the present embodiment is a three-phase brushless motor. Compared with a brush motor, the brushless motor has less mechanical commutation, long service life and wide speed regulation range. The brushless motor overcomes the problems that the direct current brush motor is easy to block rotation when the speed is regulated at low speed and the carbon brush is quickly abraded when the speed is high.

The sealed inner cavity is sealed by a sealing ring and isolated from the water flow passage, and the structure is simple and reliable. The sealing ring is pressed tightly to press the conducting wire tightly, so that water is prevented from entering the inner cavity. The sealing mode of the sealing ring is favorable for disassembly, and the defect that the original sealing structure is damaged when the glue seal is disassembled every time is overcome. The motor controller is placed in the sealed inner cavity and is powered through 2 power lines, and the problems that the motor controller in the existing product is placed on the ground, is far away from a pump body, and is high in power and large in loss are solved. Meanwhile, the small number of the connecting wires also reduces the overall wire diameter, reduces the weight of the connecting wires, reduces the weight of the whole machine and reduces 1/3 loss.

All parts of the utility model are made of 316 sanitary stainless steel, and the water sample is not polluted when being collected. The 316 sanitary stainless steel is more corrosion-resistant and oxidation-resistant than the 304 stainless steel, and can deal with water samples in different environments.

Example 2:

the difference from the embodiment 1 is that the submersible pump with the extensible collecting head further comprises a thread sheath 23, a water pump shield inlet nozzle 22, a collecting head outlet nozzle 24, a collecting head end cover 27 and a support 25;

the water inlet nozzle 22 of the water pump shield is arranged in the through hole and is detachably connected with the threaded sheath 23; the threaded sheath 23 is a barrel with a hole matched with the water inlet nozzle 22 of the water pump shield at the bottom, the hole matched with the water inlet nozzle 22 of the water pump shield is arranged at the bottom of the threaded sheath, the diameter of the threaded sheath is matched with that of the outer tube 19, and the threaded sheath is detachably connected with the water pump shield 20; the water inlet nozzle 22 of the water pump shield penetrates through a hole at the bottom of the threaded sheath 23; the pick head end cap 27 has a diameter compatible with the diameter of the pick head side wall 28 for removable attachment thereto; the outer end face of the collecting head end cover 27 is provided with a support piece 25 and a collecting head water outlet nozzle 24; the collecting head water outlet nozzle 24 is connected with the water pump shield water inlet nozzle 22 through a hose 35, so that the depth of a water collecting layer is prolonged.

In this embodiment, the water pump shroud 20 is in threaded connection with the threaded sheath 23; the water pump protective cover 20 is provided with external threads, and the thread protective sleeve 23 is provided with internal threads; the water inlet nozzle 22 of the water pump shield is in threaded connection with the water pump shield 20; the water outlet nozzle 24 of the collecting and collecting head is connected with the water inlet nozzle 22 of the water pump shield through a hose 35, so that the depth of collecting a water layer is prolonged. The head end cap 27 is in threaded connection with the pick head side wall 28, the pick head end cap 27 being provided with external threads.

The pick head end cap 27 is a solid steel member having a weight that can act as a counterweight to prevent the water inlet from being light, the water tube from floating, the pick head from sinking, and the water layer from being collected to an unexpected depth.

Adopt directly to link the sampling water mode among the embodiment 1, when the groundwater of the deep water layer is gathered to needs, adopt the part connected mode that provides in this embodiment, through dismantling relevant part, use hose extension sampling lift, the collection head end cover 27 ensures that the hose can be straightened, and the collection head sinks to predetermineeing the water layer and gathers the water sample.

The screw thread connections adopted in the utility model are all in close fit, and if the screw thread is damaged by collision, the butt joint of all parts can be influenced. If no protection measure is provided, the parts are tightly connected with other hard objects, such as abrasion, thread damage and undetachable parts in long-term use. The thread sheath 23 can protect the thread and increase the aesthetic effect. The removable pick head end cap 27 is protected when the direct connection is used in embodiment 1. in this embodiment, the threaded sheath 23 protects the threads of the pump shroud 20.

Example 3: the difference from embodiment 2 is that the water pump impeller 17 is a multi-impeller, and the screw protector 23 is a bottomless cylinder with a screw thread inside. The lift of the embodiment can reach 300 meters, and the performance is more excellent.

Claims (10)

1. A submersible pump with extendable pick heads, comprising: the pump comprises a pump body, a water pump shield (20) and a collecting head, wherein the pump body is hermetically connected with the water pump shield (20); the water pump shield (20) is detachably connected with the collecting head; the pump body comprises an outer pipe (19), an inner pipe (18), an outer pipe end cover (4), a motor controller (11), a motor (14) and a water pump impeller (17); the diameter of the outer pipe (19) is larger than that of the inner pipe (18); the outer tube end cover (4) is in a second-order step shape; the first step is close to the outer end face of the outer tube end cover (4), and the diameter of the first step is matched with that of the outer tube (19); the second step is far away from the outer end face of the outer tube end cover (4), and the diameter of the second step is matched with that of the inner tube (18); the outer end face of the outer tube end cover (4) is provided with a water outlet hole (2) and a wire outlet hole; more than one water inlet hole (5) for the end cover of the outer pipe is formed in the side wall of the second step; the water inlet hole (5) of the outer pipe end cover is communicated with the water outlet hole (2) to form a drainage channel; more than 1 wire inlet hole is formed in the inner end face of the outer tube end cover (4); the wire outlet hole is communicated with each wire inlet hole to form a wire channel; the line channel is isolated from the drainage channel; the outer pipe (19) is hermetically connected with the first step of the outer pipe end cover (4) through an outer pipe sealing ring (3); one end of the inner pipe (18) is hermetically connected with a second step of the outer pipe end cover (4) through an inner pipe upper sealing ring (6); the other end of the inner pipe is hermetically connected with a motor (14) through an inner pipe lower sealing ring (15) to form a sealed inner cavity; the motor (14) is connected with the motor controller (11) through a motor wire (12); the motor controller (11) is arranged in the inner cavity, and a power supply input line (10) of the motor controller penetrates out of the closed inner cavity through the wire inlet hole and is led out through the wire channel; the water pump impeller (17) is arranged on a motor shaft (16) and is driven by a motor (14) to rotate; the motor shaft (16) is hermetically connected with the motor shell; a conical surface (32) matched with the water pump impeller (17) is arranged in one end of the water pump protective cover (20), and a through hole is formed in the bottom of the conical surface (32); the collecting head comprises a collecting head side wall (28), a filter screen end cover (31) and a water inlet filter screen (30); the side wall (28) of the collecting head is provided with more than one collecting head water inlet hole (29); the diameter of the water inlet filter screen (30) is matched with the inner diameter of the side wall (28) of the collecting head, and the water inlet filter screen is arranged on the inner side of the side wall (28) of the collecting head and shields each collecting head water inlet hole (29); the diameter of the filter screen end cover (31) is matched with the inner diameter of the collecting head side wall (28), and the bottom end of the collecting head is closed.

2. The extendable submersible pump pick head of claim 1, wherein: the water pump shield (20) is in threaded connection with the side wall (28) of the collecting head; the water pump shield (20) is provided with external threads, and the side wall (28) of the collecting head is provided with internal threads; collecting head water inlet holes (29) are uniformly distributed on the side wall (28) of the collecting head; the bottom of the side wall (28) of the collecting head extends inwards to form an annular edge; the diameter of the filter screen end cover (31) is matched with the inner diameter of the collecting head side wall (28); the water inlet filter screen (30) is tightly attached to the collecting head side wall (28), and the filter screen end cover (31) is tightly pressed on the annular edge of the collecting head side wall (28).

3. The extendable submersible pump pick head of claim 1, wherein: the motor temperature collector (13) is arranged in the inner cavity; collecting the shell temperature of a motor (14), and transmitting a collected temperature signal to the motor controller (11); the motor controller (11) adjusts the rotation speed of the motor (14) according to the temperature signal.

4. The extendable pick head submersible pump of claim 1, wherein: the device also comprises an inlet wire sealing pressing cover (9) and a water level sensor; more than 1 power supply input line hole (8) corresponding to the input line hole is arranged on the incoming line sealing pressing cover (9), and an incoming line sealing ring (7) is arranged in each power supply input line hole (8); the outer pipe end cover (4) is provided with a water level sensor mounting through hole; the water level sensor is installed in the water level sensor installation through hole, a lead of the water level sensor enters the inner cavity through the circuit channel and is connected with the motor controller (11), and the motor controller (11) controls the starting and stopping of the motor according to the water level collected by the water level sensor.

5. The extendable pick head submersible pump of claim 1, wherein: the water collecting device also comprises a threaded sheath (23), a water inlet nozzle (22) of the water pump shield, a water outlet nozzle (24) of the collecting head, a collecting head end cover (27) and a supporting piece (25); the water inlet nozzle (22) of the water pump shield is arranged in the through hole and is detachably connected with the threaded sheath (23); the threaded sheath (23) is a bottomless cylinder matched with the water pump shield (20), the diameter of the threaded sheath is matched with that of the outer pipe (19), and the threaded sheath is detachably connected with the water pump shield (20); the diameter of the pick head end cap (27) is adapted to the diameter of the pick head side wall (28) for removable connection therewith; the outer end face of the collecting head end cover (27) is provided with a support piece (25) and a collecting head water outlet nozzle (24); the water outlet nozzle (24) of the collecting head is connected with the water inlet nozzle (22) of the water pump protective cover through a hose (35).

6. The extendable underwater pump of claim 5, wherein: the water pump protective cover (20) is in threaded connection with the threaded protective sleeve (23); the water pump protective cover (20) is provided with external threads; the thread sheath (23) is provided with internal threads; the water inlet nozzle (22) of the water pump shield is in threaded connection with the water pump shield (20); the pick head end cap (27) is threadably connected to the pick head sidewall (28); the collecting head end cover (27) is provided with external threads; collecting head water inlet holes (29) are uniformly distributed on the side wall (28) of the collecting head; the bottom of the side wall (28) of the collecting head extends inwards to form an annular edge; the diameter of the filter screen end cover (31) is matched with the inner diameter of the collecting head side wall (28); the water inlet screen (30) is tightly attached to the side wall (28) of the collecting head, and the screen end cover (31) is tightly pressed on the annular edge of the side wall (28) of the collecting head.

7. The extendable pick head submersible pump of claim 6, wherein: the device also comprises an incoming line sealing pressing cover (9) and a water level sensor; more than 1 power supply input line hole (8) corresponding to the input line hole is arranged on the incoming line sealing pressing cover (9), and an incoming line sealing ring (7) is arranged in each power supply input line hole (8); the outer pipe end cover (4) is provided with a water level sensor mounting through hole; the water level sensor is arranged in the water level sensor mounting through hole, and a lead of the water level sensor enters the inner cavity through the circuit channel and is connected with the motor controller (11).

8. The extendable submersible pump of claim 7, wherein: the motor temperature collector (13) is arranged in the inner cavity; collecting the shell temperature of a motor (14), and transmitting a collected temperature signal to the motor controller (11); the motor controller (11) adjusts the rotation speed of the motor (14) according to the temperature signal.

9. The extendable submersible pump pick head of claim 1, wherein: the water collecting device also comprises a threaded sheath (23), a water inlet nozzle (22) of the water pump shield, a water outlet nozzle (24) of the collecting head, a collecting head end cover (27) and a supporting piece (25); the water inlet nozzle (22) of the water pump shield is arranged in the through hole and is detachably connected with the threaded sheath (23); the threaded sheath (23) is a barrel matched with the water pump shield (20), and the bottom of the threaded sheath is provided with a hole matched with the water inlet nozzle (22) of the water pump shield; the diameter of the water pump is matched with that of the outer pipe (19) and is detachably connected with the water pump shield (20); the water inlet nozzle (22) of the water pump shield penetrates through a hole in the bottom of the threaded sheath (23); the diameter of the pick head end cap (27) is adapted to the diameter of the pick head side wall (28) for removable connection therewith; the outer end face of the collecting head end cover (27) is provided with a support piece (25) and a collecting head water outlet nozzle (24); the water outlet nozzle (24) of the collecting head is connected with the water inlet nozzle (22) of the water pump protective cover through a hose (35).

10. An extendible submersible pump according to any of claims 1 to 9, wherein: the device also comprises a control unit, a display module, a positioning module, a communication module, a flow detection module, an operation module, a DC/DC converter, a power supply module, a leakage and drop module, a temperature acquisition module and a water level detection module; the power supply module comprises an AC/DC conversion circuit;

the control unit is bidirectionally connected with the positioning module, the communication module, the flow detection module and the leakage and descent module; the corresponding input ends of the control unit are respectively connected with the corresponding output ends of the operation module and the power supply module, and the corresponding output ends of the control unit are respectively connected with the corresponding input ends of the display module and the DC/DC converter; the corresponding input ends of the motor controller are respectively connected with the corresponding output ends of the DC/DC converter, the temperature acquisition module and the water level detection module, and the corresponding output ends of the motor controller are connected with the control end of the motor (14);

the water level detection module receives a water pressure signal acquired by the pressure sensor, analyzes the water level and the burial depth to obtain the water level and the burial depth, and controls the starting and stopping of the motor through the motor controller according to the water level and the burial depth;

the temperature acquisition module acquires the temperature of the motor controller and the temperature of the motor shell through the thermistor, transmits the temperature of the motor controller and the temperature of the motor shell to the motor controller, and the motor controller controls the rotating speed of the motor according to the temperature of the motor controller and the temperature of the motor shell.

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