阅读说明：本技术 一种具有液位检测功能的深井潜水泵及其检测方法 (Deep well submersible pump with liquid level detection function and detection method thereof ) 是由 苏学斌 刘正邦 李建军 阙为民 原渊 周根茂 陈碧华 艾兴华 于 2020-07-03 设计创作，主要内容包括：本发明提供的具有液位检测功能的深井潜水泵及其检测方法,包括泵体和液位检测器,液位检测器包括压力传感器和仪表盘,压力传感器设置在泵体上。本发明提供的具有液位检测功能的深井潜水泵,可以实现抽液井的液位动态检测、低水位报警和超低水位停泵,提高潜水泵的使用安全性；本发明提供的液位检测方法简单,具有操作智能化、检测精准的特点。(The deep well submersible pump with the liquid level detection function and the detection method thereof comprise a pump body and a liquid level detector, wherein the liquid level detector comprises a pressure sensor and an instrument panel, and the pressure sensor is arranged on the pump body. The deep well submersible pump with the liquid level detection function can realize dynamic liquid level detection, low water level alarm and ultralow water level pump stop of a liquid pumping well, and improves the use safety of the submersible pump; the liquid level detection method provided by the invention is simple, and has the characteristics of intelligent operation and accurate detection.)

1. The utility model provides a deep well immersible pump with liquid level detection function which characterized in that, includes the pump body and liquid level detector, liquid level detector includes pressure sensor (1) and panel board (3), pressure sensor (1) sets up on the pump body, panel board (3) set up on the earth's surface.

2. The deep well submersible pump with liquid level detection function according to claim 1, wherein the pump body comprises a submersible motor (5) and a pump head (6), the submersible motor (5) is connected with the pump head (6) through a connecting bracket (7), and the pressure sensor (1) is arranged on the connecting bracket (7).

3. The deep well submersible pump with liquid level detection function according to claim 2, wherein the connecting bracket (7) comprises a connecting cylinder, the upper end and the lower end of the connecting cylinder are respectively provided with a flange (4), and the connecting cylinder is connected with the submersible motor (5) and the water pump head (6) through the flanges (4); the pressure sensor (1) is arranged on the outer wall of the connecting cylinder.

4. The deep well submersible pump with liquid level detection function according to claim 3, characterized in that the pressure sensor (1) is connected with the gauge panel (3) through a signal line, and the signal line and the power line of the pump body share one cable (2).

5. The method for detecting the liquid level of the deep well submersible pump with the liquid level detection function according to any one of claims 1 to 4, comprising the steps of:

(1) after the pump body is lowered into a liquid pumping well and installed in place, measuring the height H1 from the ground to the water outlet of the water pump, the height H2 from the water outlet of the water pump to the pressure sensor, and the absolute elevation or the relative elevation H of the ground; the height from the moving water level to the pressure sensor is the submerging depth h3, and h3 is detected by the pressure sensor; the height from the lowest dynamic water level to the pressure sensor is the designed minimum submerging depth h 4; designing a pump stopping water level, wherein the height from the pump stopping water level to the pressure sensor is a pump stopping protection depth h 5; inputting h1, h2, H, h4 and h5 into an instrument panel;

(2) according to the submergence depth H3 detected by the pressure sensor, automatically calculating the elevation H0 of the dynamic water level in the liquid pumping well by a data processing system in the instrument panel, wherein the calculation formula is H0 ═ H- (H1+ H2) + H3;

(3) when the flooding depth (h3) detected by the pressure sensor is less than the designed minimum flooding depth (h4), the instrument panel gives an alarm; when the submerging depth (h3) is less than the set pump stopping protection depth (h5), the instrument panel sends out a pump stopping signal, and the water pump stops working.

Technical Field

The invention belongs to the technical field of in-situ leaching uranium mining mine engineering, and relates to a deep well submersible pump with a liquid level detection function; the invention also relates to a liquid level detection method of the submersible pump.

Background

In the mining of the in-situ leaching uranium mining mine, a large number of liquid injection wells and liquid pumping wells are required to be built in well sites of all mining areas, in addition, the in-situ leaching agent is required to be injected into underground uranium-containing geological layers through the liquid injection wells, the leaching liquid is lifted to the ground surface through the liquid pumping wells, and the pumping is carried out to a hydrometallurgy plant. At present, a submerged pump is generally adopted as leachate lifting equipment in domestic leaching mines. Influenced by the construction cost of a liquid injection well and a liquid pumping well, the well diameter of the liquid injection well is generally DN100 at present, the well diameter of the upper section (above the installation position of a water pump) of the liquid pumping well is generally DN150, the well diameter of the lower section is generally DN100, and the water pump is generally a submersible pump with the diameter of 100 mm. Because the underground water permeability coefficient of the sandstone-type in-situ uranium leaching mine ore bed in China is small, the situations that the injection liquid amount of the injection well is reduced and the leaching liquid running water level of the leaching well is seriously reduced due to the blocking of the ore bed in the work can cause the dehydration of the water pump (the running water level is lower than the water inlet of the water pump) and the dry rotation of the motor due to the overhigh temperature and the burnout of the motor in the serious case. For example, the annual failure rate of the submerged pump for the uranium-leaching mine at some domestic place is up to 20-25%.

Because of the narrow and small of deep well engineering water pump installation environmental condition and the degree of depth and the uncertainty of liquid level of well, be difficult to independently set up effectual liquid level detection equipment, and the deep immersible pump for well on the existing market all does not have the liquid level and detects the function.

Disclosure of Invention

The invention aims to provide a deep well submersible pump with a liquid level detection function, and aims to solve the problem that the deep well submersible pump is easy to dehydrate and dry-rotate, so that a motor is burnt due to overhigh temperature.

The second purpose of the invention is to provide a liquid level detection method of the submersible pump.

The technical scheme provided by the invention is as follows: a deep well submersible pump with a liquid level detection function comprises a pump body and a liquid level detector, wherein the liquid level detector comprises a pressure sensor and an instrument panel, and the pressure sensor is arranged on the pump body.

Preferably, the pump body includes dive motor and pump head, and the dive motor passes through linking bridge with the pump head to be connected, and pressure sensor installs on linking bridge.

Preferably, the connecting bracket comprises a connecting cylinder, the upper end and the lower end of the connecting cylinder are respectively provided with a flange, and the connecting cylinder is connected with the submersible motor and the water pump head through the flanges; the pressure sensor is arranged on the outer wall of the connecting cylinder.

Preferably, the pressure sensor is connected with the instrument panel through a signal wire, and the signal wire and a power wire of the pump body share one cable.

The liquid level detection method of the deep well submersible pump with the liquid level detection function comprises the following steps:

(1) after the pump body is lowered into the liquid pumping well and installed in place, marking and measuring the height H1 from the ground to the water outlet of the water pump, the height H2 from the water outlet of the water pump to the pressure sensor and the absolute elevation or the relative elevation H of the ground; the height from the dynamic water level to the pressure sensor is the submerging depth h3, and the value is monitored by the pressure sensor; designing a minimum dynamic water level (the value is determined by design), wherein the height from the minimum dynamic water level to the pressure sensor is a designed minimum submerging depth h 4; designing a pump stopping water level for protecting the water pump (the value is determined by the design according to the performance of the water pump), wherein the height from the pump stopping water level to the pressure sensor is a pump stopping protection depth h 5; inputting h1, h2, H, h4 and h5 into an instrument panel;

(2) according to the submergence depth H3 detected by the pressure sensor, a data processing system in an instrument panel automatically calculates a mark H0 of the dynamic water level in the liquid pumping well, and the calculation formula is H0 ═ H- (H1+ H2) + H3;

(3) when the flooding depth h3 detected by the pressure sensor is less than the designed minimum flooding depth h4, the instrument panel gives an alarm; when the submerging depth h3 is smaller than the set pump stopping protection depth h5, the instrument panel sends a pump stopping signal, and the water pump stops working.

The invention has the following beneficial effects:

the deep well submersible pump with the liquid level detection function provided by the invention realizes the functions of dynamic detection of the liquid level of the pumping well, low-water-level alarm and automatic pump stop of ultra-low water level, and improves the use safety of the submersible pump.

The deep well submersible pump with the liquid level detection function combines the liquid level detector and the submersible pump together, and the signal transmission of the deep well submersible pump and the submersible pump share one cable, so that the problem that a liquid level detection device is difficult to independently arrange in a liquid pumping well is solved, and the simplification of a dynamic liquid level detection and alarm system of the liquid pumping well is realized.

The liquid level detection method provided by the invention can detect and display the liquid level elevation of the liquid pumping well in real time, is beneficial to improving the production efficiency of the in-situ leaching uranium mining mine, and has the characteristics of intelligent operation and accurate detection.

Drawings

FIG. 1 is a schematic structural view of a deep well submersible pump with liquid level detection function according to the present invention;

FIG. 2 is a schematic view of a connecting bracket according to the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic diagram of the detection method of the deep well submersible pump with liquid level detection function according to the present invention.

In the figure, 1, a pressure sensor, 2, a cable, 3, an instrument panel, 4, a flange, 5, a submersible motor, 6, a water pump head, 7, a connecting support, 8, an observation window, 9, a water outlet pipe, 10, a deep well casing and 11, water pump shafts.

Detailed Description

The technical solution provided by the present invention is further specifically described below with reference to the following embodiments and the accompanying drawings.

The deep well submersible pump with the liquid level detection function comprises a deep well submersible pump body, wherein a liquid level detector is arranged on the deep well submersible pump body, the liquid level detector comprises a pressure sensor 1 and an instrument panel 3, the pressure sensor 1 is arranged on the pump body, the instrument panel 3 is arranged on the ground surface, and the pressure sensor 1 is connected with the instrument panel 3 through a signal line.

The pump body includes dive motor 5 and pump head 6, and dive motor 5 passes through linking bridge 7 with water pump head 6 to be connected, and pressure sensor 1 installs on linking bridge 7.

The connecting bracket 7 comprises a connecting cylinder, the upper end and the lower end of the connecting cylinder are respectively provided with a flange 4, the connecting cylinder is connected with a submersible motor 5 and a water pump head 6 through an upper flange 4 and a lower flange 4, the connecting cylinder is provided with an observation window 8, and a motor shaft of the submersible motor 5 is connected with a water pump shaft 11 of the water pump head 6 in the connecting cylinder 7; the pressure sensor 1 is arranged on the outer wall of the connecting cylinder.

The pressure sensor 1 can detect external liquid pressure, and preferably is a capacitive pressure sensor, and has the characteristics of small volume and high sensitivity, so that the pressure sensor is convenient to mount on a submersible pump.

The pressure sensor 1 is fixed in a manner of ensuring firmness and is convenient to disassemble and replace.

Pressure sensor 1 fixes in the outside of connecting cylinder, and the diameter of connecting cylinder is all little than the diameter of dive motor 5 and pump head 6, forms the sunken structure of inside shrink, and pressure sensor 1 sets up on sunken connecting cylinder, can avoid colliding with the damage.

The signal line of the liquid level detector and the power line of the submersible pump share one cable 2, and the cable 2 is fixed on the outer wall of the submersible pump through a cable fixing device, so that the cable 2 can be prevented from being collided and damaged. The bifurcation and the joint of the cable 2 are protected by a waterproof joint, so that the waterproof and the use safety are ensured. The protection of the cable fixing device and the waterproof joint is a general protection mode of the submersible electric pump cable.

The instrument panel 3 is provided with a control device and a data processing system for inputting raw data and receiving and processing signals of the pressure sensor. The instrument panel 3 may be provided independently, or may be provided in combination with a power box, a control box, or a terminal box.

The liquid level detection method of the deep well submersible pump with the liquid level detection function, referring to fig. 4, comprises the following steps:

(1) the pump body is lowered into the liquid pumping well, after the pump body is installed in place, the instrument panel 3 is arranged on the ground, and the height H1 from the ground to the water outlet of the water pump, the height H2 from the water outlet of the water pump to the pressure sensor and the absolute elevation or the relative elevation H of the ground are measured; the height from the dynamic water level to the pressure sensor is the submerging depth h3, and the value is detected by the pressure sensor; the height from the designed lowest dynamic water level (the value is determined by design) to the pressure sensor is the designed minimum submerging depth h 4; for protecting the water pump, designing a pump stopping water level (the value is determined by the design according to the performance of the water pump) to the height of the pressure sensor as a pump stopping protection depth h 5; inputting h1, h2, H, h4 and h5 into an instrument panel;

(2) according to the submergence depth H3 detected by the pressure sensor, a data processing system arranged in an instrument panel automatically calculates the elevation H0 of the dynamic water level in the liquid pumping well, and the calculation formula is H0 ═ H- (H1+ H2) + H3;

(3) when the flooding depth h3 detected by the pressure sensor is less than the designed minimum flooding depth h4, the instrument panel gives an alarm; when the submerging depth h3 is smaller than the set pump stopping protection depth h5, the instrument panel sends a pump stopping signal, and the water pump stops working.

The deep well submersible pump with the liquid level detection function provided by the invention can detect the liquid level elevation of the deep well where the pump body is located in real time through the liquid level detection device, and can give an alarm at a low liquid level, so that people can conveniently and timely wash the well, and the submersible pump can be ensured to operate under a high-efficiency working condition. The pump can be automatically stopped when the liquid level of the liquid pumping well is ultralow, and the faults that the liquid injection amount of the liquid injection well is reduced due to the blockage of an ore bed, the liquid level of the liquid pumping well is seriously reduced, the dehydration of the water pump is dry, and the motor is burnt due to overhigh temperature are avoided.

The deep well submersible pump with the liquid level detection function provided by the invention can be used in deep well submersible pump installation places where underground water level detection is required and the risk of dehydration of the submersible pump exists, and is particularly suitable for deep well submersible pump installation places where the liquid level detection device is difficult to independently arrange or the cost of the liquid level detection device is high.

The liquid level detection method of the deep well submersible pump with the liquid level detection function has the characteristics of simplicity in realization, accuracy in detection and intelligentization in operation.