阅读说明：本技术 一种便携直流螺杆式地下水环境监测井专用取样泵及其应用方法 (Portable direct-current screw type sampling pump special for underground water environment monitoring well and application method thereof ) 是由 侯军亮 田西昭 范存良 范成博 何微 宫志强 王玉清 张志飞 王新友 简彦涛 董 于 2020-06-21 设计创作，主要内容包括：本发明涉及一种便携直流螺杆式地下水环境监测井专用取样泵及其应用方法,其包括：泵壳,泵芯,锂电池,控制器,浮子开关,调速旋钮,本发明通过设计将潜水泵和电源合并为一体,解决携带不便的问题；是一种价格低廉、能够用于小口径的地下水环境监测井、满足建井后和取样前洗井、保证地下水取样的低扰动,且取样过程操作简便、便于携带的直流螺杆泵,能够填补市场上在此方面的空白,解决我国不同井径的地下水监测井洗井与取样时采样器的选取问题,同时为经济欠发达地区、偏远地区地下水监测工作提供有力的支持。(The invention relates to a portable direct-current screw type sampling pump special for an underground water environment monitoring well and an application method thereof, wherein the sampling pump comprises the following components: the invention integrates the submersible pump and the power supply into a whole by design, thereby solving the problem of inconvenient carrying; the direct-current screw pump is low in price, can be used for a small-bore underground water environment monitoring well, satisfies well washing after well construction and before sampling, ensures low disturbance of underground water sampling, is simple and convenient to operate in the sampling process, is convenient to carry, can fill the blank in the aspect on the market, solves the problem of selecting a sampler during well washing and sampling of underground water monitoring wells with different well diameters in China, and provides powerful support for underground water monitoring work in underdeveloped areas and remote areas.)

1. The utility model provides a special sampling pump of portable direct current screw groundwater environment monitoring well which characterized in that: it includes:

the pump shell is of a cylindrical barrel-shaped structure and comprises an upper shell and a lower shell, a first accommodating cavity and a second accommodating cavity are sequentially arranged in the upper shell from top to bottom, a third accommodating cavity is arranged in the lower shell, the upper shell and the lower shell are fixedly connected through threads, and a lifting ring is fixed on the upper end face of the upper shell;

the pump core is fixed in the first accommodating cavity, a water inlet pipe and a water outlet pipe of the pump core penetrate out of the upper end face of the upper shell, the water outlet pipe of the pump core is connected with the pagoda joint, the end part of the water inlet pipe of the pump core is flush with the upper surface of the upper shell and is provided with a filter, and a water surface induction probe is fixed on the upper surface of the upper shell on one side of the port of the water inlet pipe;

the lithium battery is placed in the second accommodating cavity from the lower end of the upper shell, a battery positioning block is inserted below the lithium battery, and the battery positioning block and the lithium battery are sequentially tightly propped in the second accommodating cavity when the upper end of the lower shell is screwed into the upper shell;

the controller is fixed in the third accommodating cavity;

the float switch is arranged on the lower end face of the lower shell and comprises a spring, a base, a sliding rod, a movable contact piece and a fixed contact piece, wherein the lower end of the sliding rod is vertically fixed on the upper surface of the base, the upper end of the sliding rod is vertically fixed on the lower end face of the lower shell, the fixed contact piece is sleeved on the sliding rod and is fixed on the lower end face of the lower shell, the spring is sleeved on the sliding rod, the lower end of the spring is fixed on the base, the upper end of the spring is fixed on the lower surface of the movable contact piece, the movable contact piece is arranged on the sliding rod in a sliding mode and is kept on the lower portion of the sliding rod under the action of spring tension, the movable contact piece is a hollow float, and after the movable contact piece is completely immersed in water, the buoyancy of water to the;

the speed regulation knob is arranged on the lower end surface of the lower shell;

the controller is respectively connected with the pump core, the float switch, the lithium battery, the water surface induction probe and the speed regulation knob through wires.

2. The special sampling pump for the portable direct-current screw type underground water environment monitoring well as claimed in claim 1, is characterized in that: the pump shell is internally provided with a sealed cavity, the joint of the water inlet pipe and the water outlet pipe of the pump core and the upper shell is provided with a built-in diaphragm, the joint of the lead of the fixed contact piece and the lower end surface of the lower shell is provided with a built-in diaphragm, and the joint of the speed regulating knob and the lower shell is provided with a built-in diaphragm.

3. The special sampling pump for the portable direct-current screw type underground water environment monitoring well as claimed in claim 1, is characterized in that: the fixed contact is a pressure sensor.

4. The special sampling pump for the portable direct-current screw type underground water environment monitoring well as claimed in claim 1, is characterized in that: the pump casing has a diameter of 75mm and a length of 640 mm.

5. The special sampling pump for the portable direct-current screw type underground water environment monitoring well as claimed in claim 1, is characterized in that: the pump shell and the lifting ring are both made of 304 stainless steel.

6. The special sampling pump for the portable direct-current screw type underground water environment monitoring well as claimed in claim 2, is characterized in that: the built-in diaphragm is made of polytetrafluoroethylene.

7. A method for washing a well by using the sampling pump special for the portable direct-current screw type underground water environment monitoring well of any one of claims 1 to 6, which is characterized by comprising the following steps:

(1) installing a well washing device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that a speed regulation knob is closed; installing a lithium battery; installing a pagoda joint, a filter and a lifting ring; inserting one end of the water outlet pipe into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope penetrates through the spring fastener, screwing the nut after the spring fastener penetrates into the lifting ring, and finishing the installation;

(2) adjusting the well washing device: after the well washing device is installed in place, a water pipe is connected with the sampling pump, and according to the use requirement of well washing, the larger power is selected, the speed regulating knob is rotated to the larger flow speed, and at the moment, the sampling pump is in a state of waiting for pump starting;

(3) and (3) well flushing: the method comprises the following steps of putting a sampling pump downwards into a drill hole, when a water surface induction probe contacts the water surface, continuously descending the sampling pump to a preset sampling depth meter number by a ground operator, automatically starting the sampling pump after the sampling pump contacts the water surface, starting to suck underground water, transmitting the underground water to the ground through power, and starting to wash a well; after the requirement of well washing is met, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the well washing work is completed.

8. A method for sampling by using the portable direct-current screw type sampling pump special for the underground water environment monitoring well as defined in any one of claims 1-6, is characterized by comprising the following steps:

(1) installation of the sampling device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that a speed regulation knob is closed; installing a lithium battery; installing a pagoda joint, a filter and a lifting ring; inserting one end of the water outlet pipe into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope penetrates through the spring fastener, screwing the nut after the spring fastener penetrates into the lifting ring, and finishing the installation;

(2) adjustment of the sampling device: after the sampling device is installed in place, the water pipe is connected with the sampling pump, the lower power is selected according to the requirements of sampling flow rate and the like, the speed regulating knob is rotated to the lower flow rate, and the sampling pump is in a state of waiting for starting the pump;

(3) sampling: the method comprises the following steps that a sampling pump is placed downwards into a drill hole, after a water surface sensor contacts the water surface, ground operators continue to move the sampling pump downwards to a preset sampling depth meter number, the sampling pump is started automatically after contacting the water surface, the underground water starts to be sucked and transmitted to the ground through power, a sampling bottle is connected to a sampling pipe of a pagoda joint, and sampling is started; after the water intake quantity meets the requirement, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the sampling work is finished.

Technical Field

The invention relates to the technical field of underground water environment monitoring, in particular to a portable direct-current screw type sampling pump special for an underground water environment monitoring well and an application method thereof.

Background

With the development of socioeconomic in China, the environmental problem of underground water is increasingly outstanding, and the underground water in partial areas is seriously polluted. Scientific and accurate investigation, evaluation and treatment of contaminated groundwater is becoming increasingly important. At present, the main means of groundwater pollution investigation and water quality monitoring is to take samples in groundwater monitoring wells for testing. When underground water sampling is carried out, the quality and effectiveness of the underground water quality detection result are directly related to the aspects of whether the underground water environment monitoring well is fully washed, the selection of sampling appliances and the like. Foreign countries attach importance to groundwater sampling technology and have formed large-scale and systematic sampling appliance products; however, the underground water sampling technology, especially the sampling equipment, is relatively late in the beginning of China, and the technology is relatively lagged abroad.

According to market investigation, the sampling devices which are common in China at present are roughly divided into four types: a sampling cylinder type sampler, an inertia type sampler, a gas drive type sampler and a diving and electric pump type sampler. The performances of all appliances are different, low-price pumps such as a sampling cylinder type sampler, an inertial type sampler, a submerged sampling pump and the like have large caliber flow and low sampling quality, and are difficult to meet the increasingly strict requirements of cleaning and sampling; and the air bag pump and the U-shaped tube pump which can meet the requirements need to carry a tank body, are complex and complicated to operate, have low efficiency, and have the problems of short service life, high material consumption and the like.

When the underground water environment monitoring well is built, the sediment content is high, so the requirement on well washing work is more strict, the well washing work is required to be carried out till the well washing work is completed, at least 3-5 times (about 50-500 m3 underground water volume) of the water body in the well washing pipe needs to be washed, the common pump for well washing in the domestic market at present is a submersible sampling pump, but the common pump is a submersible sampling pump, the common pump cannot be used as a well washing tool and a sampling tool due to large diameter or devices such as a generator, an external power supply and the like, the well washing pump is heavy and tedious to use, the efficiency is extremely low and wastes time and labor due to the fact that the common pump is used by manual bailer pipe water lifting, and although partial air bag pumps and small-diameter multifunctional centrifugal pumps can be selected, the well washing efficiency.

At present, a plurality of technical methods for well construction specifications and sampling of underground water environment monitoring wells are issued successively in China, wherein the outer diameter design range of well pipes of the monitoring wells is regulated to be 50-200 mm, and the water level burial depth range in the underground water monitoring wells is 2-100 m in general. Well washing is carried out in time before water samples are collected, and the using amount of the washing underground water is not less than 3-5 times of the well volume (the well washing water amount is about 10-100 m 3). The diameter of the submersible sampling pump is larger than the well diameter of part of the monitoring well, so that the application range is limited; the flow rate of a part of air bag pumps is low, the efficiency is low, the price is high, and the cost performance is not high; the efficiency of the manual bailer tube water lifting well washing is extremely low, and a large amount of manpower and material resources are consumed.

In the underground water quality standard GB/T-14848-2017 which is implemented in 5, 1 and 2018 in China, the monitoring indexes are increased from 39 indexes of the original standard to 93 indexes, wherein 47 indexes of organic compounds are increased, and the requirements on underground water sampling instruments and methods are also increased: disturbance to underground water is reduced as much as possible, and meanwhile, when organic sample sampling is carried out, the flow of a low-cost submersible sampling pump is large, the disturbance to the underground water is large, and the sampling pump is not suitable for sampling of volatile organic pollutants, semi-volatile organic pollutants and the like; the air bag pump is high in price, the sediment in underground water has large loss to the air bag pump, the cost performance is not high, and the popularity is low; both the submersible sampling pump and the air bag pump need a generator or an external power supply and other devices, and are complex, heavy and not easy to carry, so that the sampling efficiency is low.

By summarizing the standard requirements of the market in China on well washing and sampling and the current situation of increasing organic matter monitoring indexes, a novel, convenient, efficient and low-price sampling pump special for a straight-flow type groundwater environment monitoring well, which can be used for well washing and sampling work after a groundwater environment monitoring well is built and before sampling, is urgently needed to be developed and popularized.

The research result of the project can fill the blank in the market in the aspect, and simultaneously solves the problems of well washing of the small-caliber underground water monitoring well and selection of the sampler during sampling.

In order to solve the problems, the invention provides a special portable direct-current screw type sampling pump for an underground water environment monitoring well and an application method thereof.

Disclosure of Invention

(1) Technical problem to be solved

The invention aims to overcome the defects of the prior art, adapt to the practical requirements, and provide a special portable direct-current screw type sampling pump for an underground water environment monitoring well and an application method thereof so as to solve the problems in the background art.

(2) Technical scheme

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

the utility model provides a special sampling pump of portable direct current screw groundwater environment monitoring well, it includes:

the pump shell is of a cylindrical barrel-shaped structure and comprises an upper shell and a lower shell, a first accommodating cavity and a second accommodating cavity are sequentially arranged in the upper shell from top to bottom, a third accommodating cavity is arranged in the lower shell, the upper shell and the lower shell are fixedly connected through threads, and a lifting ring is fixed on the upper end face of the upper shell;

the pump core is fixed in the first accommodating cavity, a water inlet pipe and a water outlet pipe of the pump core penetrate out of the upper end face of the upper shell, the water outlet pipe of the pump core is connected with the pagoda joint, the end part of the water inlet pipe of the pump core is flush with the upper surface of the upper shell and is provided with a filter, and a water surface induction probe is fixed on the upper surface of the upper shell on one side of the port of the water inlet pipe;

the lithium battery is placed in the second accommodating cavity from the lower end of the upper shell, a battery positioning block is inserted below the lithium battery, and the battery positioning block and the lithium battery are sequentially tightly propped in the second accommodating cavity when the upper end of the lower shell is screwed into the upper shell;

the controller is fixed in the third accommodating cavity;

the float switch is arranged on the lower end face of the lower shell and comprises a spring, a base, a sliding rod, a movable contact piece and a fixed contact piece, wherein the lower end of the sliding rod is vertically fixed on the upper surface of the base, the upper end of the sliding rod is vertically fixed on the lower end face of the lower shell, the fixed contact piece is sleeved on the sliding rod and is fixed on the lower end face of the lower shell, the spring is sleeved on the sliding rod, the lower end of the spring is fixed on the base, the upper end of the spring is fixed on the lower surface of the movable contact piece, the movable contact piece is arranged on the sliding rod in a sliding mode and is kept on the lower portion of the sliding rod under the action of spring tension, the movable contact piece is a hollow float, and after the movable contact piece is completely immersed in water, the buoyancy of water to the;

the speed regulation knob is arranged on the lower end surface of the lower shell;

the controller is respectively connected with the pump core, the float switch, the lithium battery, the water surface induction probe and the speed regulation knob through wires.

Furthermore, a sealed cavity is arranged in the pump shell, a built-in diaphragm is arranged at the joint of the water inlet pipe and the water outlet pipe of the pump core and the upper shell, a built-in diaphragm is arranged at the joint of the lead of the fixed contact piece and the lower end face of the lower shell, and a built-in diaphragm is arranged at the joint of the speed regulating knob and the lower shell.

Further, the fixed contact piece is a pressure sensor.

Further, the diameter of the pump shell is 75mm, and the length of the pump shell is 640 mm.

Furthermore, the pump shell and the lifting ring are both made of 304 stainless steel.

Furthermore, the built-in diaphragm is made of polytetrafluoroethylene.

A method for washing a well by using the special sampling pump for the portable direct-current screw type underground water environment monitoring well comprises the following steps:

(1) installing a well washing device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that a speed regulation knob is closed; installing a lithium battery; installing a pagoda joint, a filter and a lifting ring; inserting one end of the water outlet pipe into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope penetrates through the spring fastener, screwing the nut after the spring fastener penetrates into the lifting ring, and finishing the installation;

(2) adjusting the well washing device: after the well washing device is installed in place, a water pipe is connected with the sampling pump, and according to the use requirement of well washing, the larger power is selected, the speed regulating knob is rotated to the larger flow speed, and at the moment, the sampling pump is in a state of waiting for pump starting;

(3) and (3) well flushing: the method comprises the following steps of putting a sampling pump downwards into a drill hole, when a water surface induction probe contacts the water surface, continuously descending the sampling pump to a preset sampling depth meter number by a ground operator, automatically starting the sampling pump after the sampling pump contacts the water surface, starting to suck underground water, transmitting the underground water to the ground through power, and starting to wash a well; after the requirement of well washing is met, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the well washing work is completed.

A method for sampling by using the special sampling pump for the portable direct-current screw type underground water environment monitoring well comprises the following steps:

(1) installation of the sampling device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that a speed regulation knob is closed; installing a lithium battery; installing a pagoda joint, a filter and a lifting ring; inserting one end of the water outlet pipe into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope penetrates through the spring fastener, screwing the nut after the spring fastener penetrates into the lifting ring, and finishing the installation;

(2) adjustment of the sampling device: after the sampling device is installed in place, the water pipe is connected with the sampling pump, the lower power is selected according to the requirements of sampling flow rate and the like, the speed regulating knob is rotated to the lower flow rate, and the sampling pump is in a state of waiting for starting the pump;

(3) sampling: the method comprises the following steps that a sampling pump is placed downwards into a drill hole, after a water surface sensor contacts the water surface, ground operators continue to move the sampling pump downwards to a preset sampling depth meter number, the sampling pump is started automatically after contacting the water surface, the underground water starts to be sucked and transmitted to the ground through power, a sampling bottle is connected to a sampling pipe of a pagoda joint, and sampling is started; after the water intake quantity meets the requirement, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the sampling work is finished.

(3) Has the advantages that:

the sampling pump integrates the pump body and the power supply into a whole by design, so that the problems of large volume and inconvenient carrying of a battery or a diesel engine are solved;

all water contact parts of the sampling pump, including steel wire ropes, are made of 304 stainless steel materials, and a built-in diaphragm is made of polytetrafluoroethylene materials, so that ions or organic matters in water are not adsorbed, the influence on the water quality is small, and no secondary pollution is caused;

thirdly, the design flow of the sampling pump is adjustable, and the adjusting range is 1.15-2.3 m³The flow rate can meet the well washing requirement and the efficiency is high; the small flow can meet the sampling requirement, and the disturbance to the underground water is small;

the diameter of the sampling pump is 75mm, the length range is 640mm, the weight range is 5.0-8.0 kg, the whole volume and weight are small, and the sampling pump is small, portable, convenient and portable;

fifthly, the water taking control device is integrated with the pump core through the design of the sampling pump, the pump core immediately starts water taking after the pump body is placed and contacted with water, and the pump core is immediately and automatically closed after the pump body is lifted away from the water surface, so that the automation of sampling is realized.

Drawings

FIG. 1 is an external structural view of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is a schematic view of the lower end of the lower housing of the present invention;

FIG. 4 is a cross-sectional view of the lower end of the lower housing of the present invention;

FIG. 5 is a schematic view of the present invention with the lower housing rotated out;

FIG. 6 is a schematic view of a lithium battery according to the present invention;

FIG. 7 is a schematic view of the battery positioning block of the present invention;

the reference numbers are as follows: 1-lower shell, 2-upper shell, 3-water inlet pipe, 4-lifting ring, 5-water outlet pipe, 6-filter, 7-pump core, 8-speed regulating knob, 9-spring, 10-controller, 11-base, 12-lithium battery, 13-fixed contact piece, 14-movable contact piece, 15-battery positioning block and 16-sliding rod.

Detailed Description

The invention will be further illustrated with reference to the following figures 1 to 7 and examples:

the utility model provides a special sampling pump of portable direct current screw groundwater environment monitoring well, it includes: pump case, pump core 7, lithium cell 12, controller 10, float switch, speed governing knob 8.

The pump shell is of a cylindrical barrel-shaped structure and comprises an upper shell 2 and a lower shell 1, the side walls of the upper shell 2 and the lower shell 1 are connected through a plastic connecting belt, a first accommodating cavity and a second accommodating cavity are sequentially arranged in the upper shell 2 from top to bottom, a third accommodating cavity is arranged in the lower shell 1, the upper shell 2 and the lower shell 1 are fixedly connected through threads, and a lifting ring 4 is fixed on the upper end face of the upper shell 2; the pump core 7 is fixed in the first containing cavity, the water inlet pipe 3 and the water outlet pipe 5 of the pump core penetrate out from the upper end surface of the upper shell 2, the water outlet pipe 5 of the pump core is connected with the pagoda joint, the end part of the water inlet pipe 3 is flush with the upper surface of the upper shell 2 and is provided with a filter 6 (such as a filter screen), and the upper surface of the upper shell 2 at one side of the port of the water inlet pipe 3 is fixed with a water surface induction probe (such as a water level sensor); the lithium battery 12 is placed in a second accommodating cavity from the lower end of the upper shell 2, the lower part of the lithium battery 12 is provided with a battery positioning block 15 in an inserting mode, and the battery positioning block 15 and the lithium battery 12 are tightly pushed in the second accommodating cavity in sequence when the upper end of the lower shell 1 is screwed into the upper shell 2; the controller 10 is fixed in a third accommodating cavity and is formed by packaging a plurality of layers of circuit boards together; the float switch is arranged on the lower end face of a lower shell 1 and comprises a spring 9, a base 11, a sliding rod 16, a movable contact piece 14 and a fixed contact piece 13, wherein the lower end of the sliding rod 16 is vertically fixed on the upper surface of the base 11, the upper end of the sliding rod 16 is vertically fixed on the lower end face of the lower shell 1, the fixed contact piece 13 is sleeved on the sliding rod 16 and is fixed on the lower end face of the lower shell 1, the spring 9 is sleeved on the sliding rod 16, the lower end of the spring 9 is fixed on the base 11, the upper end of the spring is fixed on the lower surface of the movable contact piece 14, the movable contact piece 14 is arranged on the sliding rod 16 in a sliding manner and is kept at the lower part of the sliding rod 16 under the action of the pulling force of the spring 9, the movable contact piece 14 is a hollow float, after the movable contact piece 14 is completely immersed in water, the buoyancy of water is larger than the pulling force of the spring 9, the, it is stepless frequency conversion speed regulation; the controller 10 is respectively connected with the pump core 7, the float switch, the lithium battery 12, the water surface induction probe and the speed regulation knob 8 through leads.

In this embodiment, the inside of the pump case is a sealed cavity, a built-in diaphragm is arranged at the joint of the water inlet pipe 3 and the water outlet pipe 5 of the pump core 7 and the upper case 2, a built-in diaphragm is arranged at the joint of the lead of the fixed contact piece 13 and the lower end face of the lower case 1, and a built-in diaphragm is arranged at the joint of the speed regulation knob 8 and the lower case 1, so that water does not enter the inside of the pump case, and the lithium battery 12, the controller 10 and the pump core 7 are protected.

In this embodiment, the fixed contact piece 13 is a pressure sensor, when the movable contact piece 14 slides upwards along the sliding rod 16 to contact with the fixed contact piece 13, the pressure sensor generates a current signal and transmits the current signal to the controller 10, the controller 10 enables the lithium battery 12 to supply power to the power supply circuit of the pump core 7, and after the pump body continues to downwards enable the water surface induction probe to submerge into the water surface, the water surface induction probe generates an electric signal to the controller 10, so that the controller 10 can control the conduction of an electrical component (such as an electromagnetic switch) on the power supply circuit of the pump core 7, and the pump core 7 starts to work to perform sampling or well washing.

In this embodiment, the pump casing has a diameter of 75mm and a length of 640 mm.

In this embodiment, the pump casing and the lifting ring 4 are both made of 304 stainless steel.

In this embodiment, the built-in diaphragm is made of teflon.

A method for washing a well by using the special sampling pump for the portable direct-current screw type underground water environment monitoring well comprises the following steps:

(1) installing a well washing device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that the speed regulation knob 8 is closed; installing the lithium battery 12; installing a pagoda joint, a filter 6 and a lifting ring 4; inserting one end of the water outlet pipe 5 into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope passes through the spring 9, screwing the nut after the spring 9 is buckled into the lifting ring 4, and finishing the installation;

(2) adjusting the well washing device: after the well washing device is installed in place, a water pipe is connected with the sampling pump, and according to the use requirement of well washing, the higher power is selected, the speed regulating knob 8 is rotated to the higher flow speed, and at the moment, the sampling pump is in a state of waiting for pump starting;

(3) and (3) well flushing: the method comprises the following steps of putting a sampling pump downwards into a drill hole, when a water surface induction probe contacts the water surface, continuously descending the sampling pump to a preset sampling depth meter number by a ground operator, automatically starting the sampling pump after the sampling pump contacts the water surface, starting to suck underground water, transmitting the underground water to the ground through power, and starting to wash a well; after the requirement of well washing is met, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the well washing work is completed.

A method for sampling by using the special sampling pump for the portable direct-current screw type underground water environment monitoring well comprises the following steps:

(1) installation of the sampling device: before installation, checking to determine whether each component is intact and whether accessories are complete, and ensuring that the speed regulation knob 8 is closed; installing the lithium battery 12; installing a pagoda joint, a filter 6 and a lifting ring 4; inserting one end of the water outlet pipe 5 into the pagoda joint, fastening the steel wire rope by using a steel wire rope clip after the steel wire rope passes through the spring 9, screwing the nut after the spring 9 is buckled into the lifting ring 4, and finishing the installation;

(2) adjustment of the sampling device: after the sampling device is installed in place, the water pipe is connected with the sampling pump, the lower power is selected according to the requirements of sampling flow rate and the like, the speed regulating knob 8 is rotated to the lower flow rate, and the sampling pump is in a state of waiting for starting the pump;

(3) sampling: the method comprises the following steps that a sampling pump is placed downwards into a drill hole, after a water surface sensor contacts the water surface, ground operators continue to move the sampling pump downwards to a preset sampling depth meter number, the sampling pump is started automatically after contacting the water surface, the underground water starts to be sucked and transmitted to the ground through power, a sampling bottle is connected to a sampling pipe of a pagoda joint, and sampling is started; after the water intake quantity meets the requirement, the sampling pump is slightly extracted upwards to the ground, the speed regulating button is rotated to the original position, and the sampling work is finished.

This special sampling pump of portable direct current screw groundwater environment monitoring well's beneficial effect:

the sampling pump integrates the pump body and the power supply into a whole by design, so that the problems of large volume and inconvenient carrying of a battery or a diesel engine are solved;

all water contact parts of the sampling pump, including steel wire ropes, are made of 304 stainless steel materials, and a built-in diaphragm is made of polytetrafluoroethylene materials, so that ions or organic matters in water are not adsorbed, the influence on the water quality is small, and no secondary pollution is caused;

thirdly, the design flow of the sampling pump is adjustable, and the adjusting range is 1.15-2.3 m³The flow rate can meet the well washing requirement and the efficiency is high; small flow can meet the sampling requirement and is suitable for underground waterThe disturbance is small;

the diameter of the sampling pump is 75mm, the length range is 640mm, the weight range is 5.0-8.0 kg, the whole volume and weight are small, and the sampling pump is small, portable, convenient and portable;

fifthly, the water taking control device is integrated with the pump core 7 through the design of the sampling pump, the pump core 7 immediately starts water taking after the pump body is placed and contacted with water, and the pump core 7 is immediately and automatically closed after the pump body is lifted away from the water surface, so that the automation of sampling is realized.

The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.