A multi-stage sealing test device for drilling groundwater stratification pumping and its use method

Abstract

The present invention discloses a multi-stage sealing test device for stratified groundwater pumping in a borehole and a method for using the same. The present invention discloses a multi-stage water-stopping and sealing test device and a method for using the device, which reinforces and supports a pumping pipe by supporting the inner wall of a borehole with a fixed hook, continuously monitors the water levels of the upper and lower aquifers of the pumping layer by an upper water level gauge and a lower water level gauge, and prevents water mixing during the pumping process. The device is characterized in that it is composed of a pumping monitoring structure, a stabilizing structure and a monitoring structure. The pumping monitoring structure is composed of a pumping pipe, an inflation pipe, an upper blocking airbag, an upper detection tube, a connecting pipe, a pumping sealing airbag, a pumping tube, a middle water level gauge, a lower detection tube, a lower water level gauge, a lower blocking airbag, a pumping trough and an upper water level gauge. The upper blocking airbag sleeve is placed on the pumping pipe and is close to one end of the pumping pipe. The lower blocking airbag sleeve is placed on the other end of the pumping pipe. The other end of the pumping pipe is a closed structure. The upper blocking airbag and the inflation pipe are connected and communicated.

Description

Technical Field

[0001] The present invention discloses a multi-stage sealing test device for stratified groundwater pumping in a borehole and a method for using the same, and relates to a multi-stage sealing device for stratified groundwater pumping test, and belongs to the technical field of geological exploration, and particularly relates to a multi-stage water-stopping sealing test device and a method for using the same, which can reinforce and support a pumping pipe during pumping to prevent misalignment of the seal, and can continuously monitor the water levels of aquifers above and below the pumping layer to prevent water mixing during the pumping process. Background Art

[0002] The stratified pumping test can analyze the characteristics of aquifers at different depths, including water richness, water quality and hydrodynamic conditions, by stratifying pumping and sampling at different depths in the same borehole. It is of great significance for hydrogeological exploration, water resource evaluation, environmental protection and water resource management. When conducting stratified pumping tests, the borehole water level is generally a mixed water level. In order to determine the water level of different aquifers and the approximate permeability of different aquifers, or to obtain single-layer target water samples and determine the layer with a greater impact on ground subsidence, the test results are as follows: In order to obtain information such as the groundwater level at different levels, it is necessary to use packers to isolate groundwater at different levels. Most of the existing packers are of the structure with plugging at both ends and pumping water in the middle. When conducting the test, after the pumping part reaches the specified level, the water-stopping function is realized by inflating the air bags at both ends, and then pumping is carried out. It is impossible to monitor whether there is water mixing during the pumping process. In addition, due to the large upward direct force of the water, it is very likely to cause the entire packer to move in the borehole, resulting in loose plugging, causing water mixing during the pumping process, and affecting the accuracy of the pumping test results.

[0003] Patent application publication number CN117684966A discloses a multi-stage sealed water pumping device suitable for groundwater stratified pumping test, including a pumping pipe sleeve, a top pipe cap is fixedly arranged in the middle of the top end of the pumping pipe sleeve, a pumping pipe head is fixedly arranged in the middle of the bottom end of the pumping pipe sleeve, a bottom pipe cap is fixedly arranged in the middle of the bottom end of the pumping pipe head, and a wear-resistant inflatable bag is fixedly arranged at the bottom of the outer ring of the pumping pipe sleeve. The present invention divides the well into a plurality of different independently sealed layers by wear-resistant inflatable bags, and then pumps water from each sealed layer by a power pump, thereby achieving the effect of stratified pumping and sealing of groundwater. A pressure sensor is arranged in the wear-resistant inflatable bag, and when the squeezing of the well wall is sensed, it can be fed back to the controller to stop inflation, thereby preventing the inflatable bag from exploding due to pressure. Patent application publication number CN117759196A discloses a sealing and water-stopping device for an exploration hole stratified pumping test, comprising a first water-stopping cylinder and a second water-stopping cylinder, one end of which is fixedly connected to a flange. The present invention can provide a sealing and adjusting mechanism for different When one of the rubber bags on the sealing adjustment mechanism is damaged and cannot be used, the next rubber bag can be switched directly in the exploration hole by adjustment, and then expanded to seal its inner wall, and all the equipment can be replaced without taking them out of the exploration hole. The above-mentioned stratified pumping device uses air bags to stop the water at the pumping point up and down before pumping. It is impossible to monitor whether there is mixed water during the pumping process. In addition, due to the large upward direct force of water, the entire packer may be displaced in the borehole, resulting in loose sealing, mixed water during the pumping process, and affecting the accuracy of the pumping test results. Summary of the invention

[0004] In order to improve the above situation, the present invention provides a multi-stage sealing test device for stratified groundwater pumping from a borehole and a method for using the same, which provides a multi-stage water-stopping and sealing test device and a method for using the same, which reinforces and supports the pumping pipe by supporting the inner wall of the borehole with a fixed hook, continuously monitors the water levels of the upper and lower aquifers of the pumping layer by an upper water level gauge and a lower water level gauge, and prevents water mixing during the pumping process.

[0005] The present invention provides a multi-stage sealing test device for stratified groundwater pumping in a borehole and a method for using the same as follows: The present invention provides a multi-stage sealing test device for stratified groundwater pumping in a borehole, which comprises a pumping monitoring structure, a stabilizing structure and a monitoring structure.

[0006] The pumping monitoring structure is composed of a pumping pipe, an air-filled pipe, an upper blocking airbag, an upper detection tube, a connecting pipe, a pumping sealing airbag, a pumping tube, a middle water level gauge, a lower detection tube, a lower water level gauge, a lower blocking airbag, a pumping trough and an upper water level gauge.

[0007] The upper blocking airbag sleeve is placed on the water pumping pipe and close to one end of the water pumping pipe, and the lower blocking airbag sleeve is placed on the other end of the water pumping pipe.

[0008] Preferably, the other end of the water pumping pipe is a closed structure.

[0009] Preferably, the upper blocking airbag is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0010] Preferably, the inner wall of the upper blocking airbag is provided with reinforcing ribs arranged in a threaded pattern, and the reinforcing ribs are made of rubber.

[0011] The upper blocking airbag and the inflation tube are connected and communicated with each other.

[0012] Preferably, the lower blocking airbag is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0013] Preferably, the inner wall of the lower blocking airbag is provided with reinforcing ribs arranged in a threaded pattern, and the reinforcing ribs are made of rubber.

[0014] Preferably, a guide head is disposed at the lower end of the lower blocking airbag, and the cross-sectional diameter of the guide head gradually decreases from one end connected to the lower blocking airbag to the other end, and the other end of the guide head is an arc-shaped structure.

[0015] The two water pumping sealing airbags are respectively placed on the water pumping pipe and located in the middle section of the water pumping pipe. There is a distance between the two water pumping sealing airbags.

[0016] Preferably, the water-pumping sealing airbag is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0017] Preferably, the inner wall of the water-pumping sealing airbag is provided with reinforcing ribs arranged in a threaded pattern, and the reinforcing ribs are made of rubber.

[0018] The upper blocking airbag, the water pumping sealing airbag and the lower blocking airbag are connected through a connecting pipe.

[0019] The water pump is placed on the water pump pipe and is located between the two water pumping sealing air bags. The water pump is connected to the water pump pipe.

[0020] Preferably, the water pump cylinder is an annular cylinder, and the outer annular surface of the water pump cylinder is connected to the water pump pipe.

[0021] The water level gauge is placed on the inner ring surface of the pumping cylinder, and there are corresponding pumping grooves on the two planes of the pumping cylinder.

[0022] Preferably, the water pumping groove is an arc-shaped structure, and there are multiple water pumping grooves, which are arranged equidistantly along the circumference of the water pumping cylinder.

[0023] The upper detection tube is placed on the water pumping pipe and is located between one of the water pumping sealing airbags and the upper blocking airbag. The upper detection tube is connected to the water pumping pipe.

[0024] Preferably, the upper detection cylinder is an annular cylinder, and the outer annular surface of the upper detection cylinder is connected to the water pumping pipe.

[0025] The upper water level gauge is placed on the inner ring surface of the upper detection cylinder.

[0026] The lower detection cylinder is placed on the water pumping pipe and is located between another water pumping sealing airbag and the lower blocking airbag. The lower detection cylinder is connected to the water pumping pipe.

[0027] Preferably, the lower detection cylinder is an annular cylinder, and the outer annular surface of the lower detection cylinder is connected to the water pumping pipe.

[0028] The lower water level gauge is placed on the inner ring surface of the lower detection cylinder.

[0029] The stable structure is composed of a mounting base, a fixing hook and an automatic telescopic rod.

[0030] The mounting base is placed on the side of the water pipe.

[0031] Preferably, there are multiple groups of mounting seats, and the multiple groups of mounting seats are arranged unequally along the axial direction of the water pumping pipe. A group of mounting seats has multiple mounting seats, and the multiple mounting seats in the same group are arranged equidistantly along the circumferential direction of the water pumping pipe.

[0032] One end of the fixing hook is hingedly placed in the mounting seat, and the other end of the fixing hook first extends obliquely downward for a distance and then extends obliquely upward in an arc shape.

[0033] Preferably, the other end of the fixing hook is provided with a supporting spike.

[0034] An automatic telescopic rod is arranged between the fixed hook and the water pumping pipe, one end of the automatic telescopic rod is fixedly connected or hinged to the side of the water pumping pipe, and the other end of the automatic telescopic rod is hinged to the side of the fixed hook;

[0035] The monitoring structure is composed of a support column, a monitoring box and an alarm.

[0036] The monitoring box is placed on the support column, the alarm is placed on the monitoring box, the monitoring box is equipped with a signal converter, the monitoring box is equipped with a data processor, and the monitoring box is equipped with a controller.

[0037] The signal converter is connected to the data processor via a data line, the data processor is connected to the controller via a data line, and the controller is connected to the alarm via a data line.

[0038] The signal converter establishes signal interaction with the middle water level meter, and the middle water level meter transmits the collected water level signal to the signal converter. The signal converter establishes signal interaction with the upper water level meter, and the upper water level meter transmits the collected water level signal to the signal converter. The signal converter establishes signal interaction with the lower water level meter, and the lower water level meter transmits the collected water level signal to the signal converter.

[0039] The signal converter converts the electrical signals of the water level data collected by the middle water level gauge, the upper water level gauge and the lower water level gauge into digital signals, and transmits them to the data processor.

[0040] The controller may be implemented by one or at least two application-specific integrated circuits, programmable logic devices, field programmable gate arrays, or microprocessors for executing instructions of the data processing device.

[0041] The data processor and the signal converter perform information exchange, and a computer-readable storage medium is stored in the data processor, and the following steps are implemented when the computer-readable storage medium is executed:

[0042] The digital signals of the water level data received from the middle water level gauge, the upper water level gauge and the lower water level gauge are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge or the lower water level gauge changes too fast within a unit time, it means that during the pumping process, there is a loose seal between the target aquifer and the upper aquifer or the lower aquifer, and there is mixed water. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a mixed water alarm. When the water level data of the middle water level gauge changes less than a set threshold within a unit time, or does not change, it means that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a blockage alarm.

[0043] The present invention also relates to a method for using a borehole groundwater stratified pumping multi-stage sealing test device, which is characterized by comprising the following steps:

[0044] (1) The multi-stage sealing test device is placed in the mixed water borehole, and the pump reaches the designated pumping layer. During the lowering process, the water level data of the middle water level gauge, upper water level gauge and lower water level gauge are continuously changing;

[0045] (2) Inflate the upper plugging airbag, pumping sealing airbag and lower plugging airbag through the inflation pipe and the connecting pipe to stop the water from entering the borehole and isolate the different aquifers. After the plugging, the water level data of the middle water level gauge, upper water level gauge and lower water level gauge tend to be stable.

[0046] (3) Control the extension of the automatic telescopic rod, which pushes the fixed hook to extend, and the fixed hook is supported on the wall of the drill hole to further limit the pumping pipe;

[0047] (4) The water pump is connected to the water pump to pump water from the aquifer where the water pump is located. Water enters the water pump through the water pumping trough and flows out through the upper detection tube and the water pumping pipe, making it convenient for test personnel to take samples from the target aquifer and observe the permeability of the target aquifer.

[0048] (5) During the pumping process, the upper water level gauge and the lower water level gauge continuously obtain water level data of the upper aquifer and the lower aquifer of the target aquifer, and send the data to the signal converter. The signal converter converts the electrical signal of the water level data collected by the upper water level gauge and the lower water level gauge into a digital signal, and transmits the digital signal to the data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented:

[0049] The digital signals of the water level data received from the middle water level gauge, the upper water level gauge and the lower water level gauge are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge or the lower water level gauge changes too fast within a unit time, it means that there is a loose seal between the target aquifer and the upper aquifer or the lower aquifer during the pumping process, and there is mixed water. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a mixed water alarm so that the test personnel can take measures to prevent mixed water in time.

[0050] (6) During the pumping process, the intermediate water level meter continuously acquires water level data of the target aquifer and sends it to a signal converter. The signal converter converts the electrical signal of the water level data collected by the intermediate water level meter into a digital signal and transmits it to a data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented:

[0051] If the water level data of the water level meter changes less than the set threshold value within a unit time, or does not change, it indicates that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a blockage alarm. The test personnel need to take timely treatment measures.

[0052] Furthermore, the outer wall of the upper blocking airbag is provided with a plurality of water-expandable rubber strips, the outer wall of the water-pumping sealing airbag is provided with a plurality of water-expandable rubber strips, and the outer wall of the lower blocking airbag is provided with a plurality of water-expandable rubber strips;

[0053] Furthermore, a protective layer is disposed on the outer surface of the guide head, the protective layer wraps the guide head, and the protective layer is made of rubber material or sponge material. Beneficial Effects

[0054] 1. Continuous monitoring of the water levels of the upper and lower aquifers of the pumping layer and timely reminders through the upper and lower water level gauges can effectively prevent water mixing during the pumping process and improve the accuracy of the pumping test results.

[0055] Second, the pumping pipe is reinforced by supporting the inner wall of the drill hole with a fixed hook to prevent the blockage and dislocation caused by the direct impact of water during the pumping process, which will cause water confusion.

[0056] 3. The upper sealing airbag, the pumping sealing airbag and the lower sealing airbag can perform multi-level water-stopping sealing on the borehole to prevent water mixing during the pumping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a structural schematic diagram of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention;

[0058] Figure 2 It is a structural schematic diagram of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention;

[0059] Figure 3 This is a schematic diagram of the structure of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention, which only shows the structure of the pumping sealing airbag;

[0060] Figure 4 It is a three-dimensional structural diagram of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention;

[0061] Figure 5 It is a structural schematic diagram of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention, which only shows the structure of the monitoring structure;

[0062] Figure 6 This is a structural schematic diagram of a second embodiment of a multi-stage sealing test device for stratified groundwater pumping in a borehole according to the present invention;

[0063] Figure 7 This is a structural schematic diagram of Example 3 of a borehole groundwater stratified pumping multi-stage sealing test device of the present invention.

[0064] Among them are: a water pumping pipe 1, an inflation pipe 2, a mounting seat 3, a fixing hook 4, an upper sealing airbag 5, an upper detection tube 6, a connecting pipe 7, a water pumping sealing airbag 8, a water pumping tube 9, a middle water level gauge 10, a lower detection tube 11, a lower water level gauge 12, a lower sealing airbag 13, a guide head 14, an automatic telescopic rod 15, a water pumping trough 16, an upper water level gauge 17, a reinforcing rib 18, a support column 19, a monitoring box 20, an alarm 21, a water-expandable rubber strip 22, and a protective layer 23. DETAILED DESCRIPTION Example 1

[0065] The present invention discloses a multi-stage sealing test device for drilling groundwater stratified pumping, which is composed of a pumping monitoring structure, a stabilizing structure and a monitoring structure.

[0066] The pumping monitoring structure is composed of a pumping pipe 1, an air-filling pipe 2, an upper blocking airbag 5, an upper detection tube 6, a connecting pipe 7, a pumping sealing airbag 8, a pumping tube 9, a middle water level gauge 10, a lower detection tube 11, a lower water level gauge 12, a lower blocking airbag 13, a pumping trough 16 and an upper water level gauge 17.

[0067] The upper blocking airbag 5 is placed on the water pumping pipe 1 and close to one end of the water pumping pipe 1, and the lower blocking airbag 13 is placed on the other end of the water pumping pipe 1.

[0068] Preferably, the other end of the water pumping pipe 1 is a closed structure.

[0069] Preferably, the upper blocking airbag 5 is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0070] Preferably, the inner wall of the upper blocking airbag 5 is provided with reinforcing ribs 18 arranged in a threaded pattern, and the reinforcing ribs 18 are made of rubber.

[0071] The upper blocking airbag 5 and the inflation tube 2 are connected and communicated with each other.

[0072] Preferably, the lower blocking airbag 13 is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0073] Preferably, the inner wall of the lower blocking airbag 13 is provided with threaded reinforcing ribs 18, and the reinforcing ribs 18 are made of rubber.

[0074] Preferably, a guide head 14 is disposed at the lower end of the lower blocking airbag 13, and the cross-sectional diameter of the guide head 14 gradually decreases from one end connected to the lower blocking airbag 13 to the other end, and the other end of the guide head 14 is an arc-shaped structure.

[0075] The two water pumping sealing airbags 8 are respectively placed on the water pumping pipe 1 and are located in the middle section of the water pumping pipe 1. There is a distance between the two water pumping sealing airbags 8.

[0076] Preferably, the water-pumping sealing airbag 8 is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer.

[0077] Preferably, the inner wall of the water-pumping sealing airbag 8 is provided with reinforcing ribs 18 arranged in a threaded pattern, and the reinforcing ribs 18 are made of rubber.

[0078] The upper blocking airbag 5, the water pumping sealing airbag 8 and the lower blocking airbag 13 are connected through a connecting pipe 7.

[0079] The water pumping cylinder 9 is placed on the water pumping pipe 1 and is located between the two water pumping sealing airbags 8. The water pumping cylinder 9 is connected to the water pumping pipe 1.

[0080] Preferably, the water pumping cylinder 9 is an annular cylinder, and the outer annular surface of the water pumping cylinder 9 is connected to the water pumping pipe 1.

[0081] The water level gauge 10 is placed on the inner surface of the pumping cylinder 9, and the two planes of the pumping cylinder 9 are respectively provided with pumping grooves 16.

[0082] Preferably, the water pumping groove 16 is an arc-shaped structure, and there are multiple water pumping grooves 16, and the multiple water pumping grooves 16 are arranged equidistantly along the circumference of the water pumping cylinder 9.

[0083] The upper detection tube 6 is placed on the water pumping pipe 1 and is located between one of the water pumping sealing airbags 8 and the upper blocking airbag 5. The upper detection tube 6 is connected to the water pumping pipe 1.

[0084] Preferably, the upper detection tube 6 is an annular tube, and the outer annular surface of the upper detection tube 6 is connected to the water pumping pipe 1.

[0085] The upper water level gauge 17 is placed on the inner ring surface of the upper detection tube 6.

[0086] The lower detection tube 11 is placed on the water pumping pipe 1 and is located between another water pumping sealing airbag 8 and the lower blocking airbag 13. The lower detection tube 11 is connected to the water pumping pipe 1.

[0087] Preferably, the lower detection cylinder 11 is an annular cylinder, and the outer annular surface of the lower detection cylinder 11 is connected to the water pumping pipe 1.

[0088] The lower water level gauge 12 is placed on the inner surface of the lower detection tube 11.

[0089] The stable structure is composed of a mounting base 3, a fixing hook 4 and an automatic telescopic rod 15.

[0090] The mounting seat 3 is placed on the side of the water pump 1.

[0091] Preferably, there are multiple groups of mounting seats 3, and the multiple groups of mounting seats 3 are arranged unequally along the axial direction of the water pumping pipe 1. A group of mounting seats 3 has multiple mounting seats, and the multiple mounting seats 3 in the same group are arranged equidistantly along the circumferential direction of the water pumping pipe 1.

[0092] One end of the fixing hook 4 is hingedly placed in the mounting seat 3, and the other end of the fixing hook 4 first extends obliquely downward for a distance and then extends obliquely upward in an arc shape.

[0093] Preferably, the other end of the fixing hook 4 is provided with a supporting spike.

[0094] An automatic telescopic rod 15 is disposed between the fixed hook 4 and the water pumping pipe 1, one end of the automatic telescopic rod 15 is fixedly connected or hinged to the side of the water pumping pipe 1, and the other end of the automatic telescopic rod 15 is hinged to the side of the fixed hook 4;

[0095] The monitoring structure is composed of a support column 19, a monitoring box 20 and an alarm 21.

[0096] The monitoring box 20 is placed on the support column 19, the alarm 21 is placed on the monitoring box 20, the monitoring box 20 has a built-in signal converter, the monitoring box 20 has a built-in data processor, and the monitoring box 20 has a built-in controller.

[0097] Preferably, the support column 19 is installed on the ground next to the drill hole.

[0098] The signal converter is connected to the data processor via a data line, the data processor is connected to the controller via a data line, and the controller is connected to the alarm 21 via a data line.

[0099] The signal converter establishes signal interaction with the middle water level meter 10, and the middle water level meter 10 transmits the collected water level signal to the signal converter. The signal converter establishes signal interaction with the upper water level meter 17, and the upper water level meter 17 transmits the collected water level signal to the signal converter. The signal converter establishes signal interaction with the lower water level meter 12, and the lower water level meter 12 transmits the collected water level signal to the signal converter.

[0100] The signal converter converts the electrical signals of the water level data collected by the middle water level meter 10, the upper water level meter 17 and the lower water level meter 12 into digital signals and transmits them to the data processor.

[0101] The controller is implemented by one or at least two application-specific integrated circuits, programmable logic devices, field programmable gate arrays, and microprocessors, and is used to execute instructions of the data processing device.

[0102] The data processor and the signal converter perform information exchange, and a computer-readable storage medium is stored in the data processor, and the following steps are implemented when the computer-readable storage medium is executed:

[0103] The received digital signals of the water level data of the middle water level gauge 10, the upper water level gauge 17 and the lower water level gauge 12 are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge 17 or the lower water level gauge 12 changes too fast within a unit time, it means that there is a loose seal between the pumping layer and the upper aquifer or the lower aquifer during the pumping process, and there is mixed water. The data processor sends an execution instruction to the controller, and the controller controls the alarm 21 to issue a mixed water alarm; when the water level data of the middle water level gauge 10 changes less than the set threshold within a unit time, or does not change, it means that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm 21 to issue a blockage alarm.

[0104] The present invention provides a method for using a multi-stage sealing test device for stratified groundwater pumping in a borehole, which is characterized by comprising the following steps:

[0105] (1) The multi-stage sealing test device is placed in the mixed water borehole, and the pumping cylinder 9 reaches the designated pumping layer. During the lowering process, the water level data of the middle water level gauge 10, the upper water level gauge 17 and the lower water level gauge 12 are continuously changing;

[0106] (2) Inflate the upper blocking airbag 5, the pumping sealing airbag 8 and the lower blocking airbag 13 through the inflation pipe 2 and the connecting pipe 7 to stop water, seal and isolate different aquifers in the borehole. After sealing, the water level data of the middle water level gauge 10, the upper water level gauge 17 and the lower water level gauge 12 tend to be stable;

[0107] (3) Controlling the automatic telescopic rod 15 to extend, the automatic telescopic rod 15 pushes the fixing hook 4 to extend, and the fixing hook 4 is supported on the wall of the drill hole to further limit the position of the water pumping pipe 1;

[0108] (4) The water pumping pipe 1 is connected to the water pump to pump water from the aquifer where the water pumping cylinder 9 is located. Water enters the water pumping cylinder 9 through the water pumping trough 16 and flows out through the upper detection cylinder 6 and the water pumping pipe 1, which is convenient for the test personnel to take samples from the target aquifer and observe the permeability of the target aquifer;

[0109] (5) During the pumping process, the upper water level gauge 17 and the lower water level gauge 12 continuously obtain water level data of the upper aquifer and the lower aquifer of the target aquifer, and send the data to the signal converter. The signal converter converts the electrical signal of the water level data collected by the upper water level gauge 17 and the lower water level gauge 12 into a digital signal, and transmits the digital signal to the data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented:

[0110] The digital signals of the water level data received from the middle water level gauge 10, the upper water level gauge 17 and the lower water level gauge 12 are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge 17 or the lower water level gauge 12 changes too fast within a unit time, it means that there is a loose seal between the target aquifer and the upper aquifer or the lower aquifer during the pumping process, and there is mixed water. The data processor sends an execution instruction to the controller, and the controller controls the alarm 21 to issue a mixed water alarm so that the test personnel can take measures to prevent mixed water in time.

[0111] (6) During the pumping process, the water level meter 10 continuously obtains the water level data of the target aquifer and sends it to the signal converter. The signal converter converts the electrical signal of the water level data collected by the water level meter 10 into a digital signal and transmits it to the data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented:

[0112] If the water level data of the water level meter 10 changes less than the set threshold value within a unit time, or does not change, it indicates that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm 21 to issue a blockage alarm. The test personnel need to take timely treatment measures. Example 2

[0113] The difference between this embodiment and the first embodiment is that: the outer wall of the upper sealing airbag is provided with a plurality of water-expandable rubber strips 22, the outer wall of the water-pumping sealing airbag 8 is provided with a plurality of water-expandable rubber strips 22, and the outer wall of the lower sealing airbag is provided with a plurality of water-expandable rubber strips 22; when in use, the water-expandable rubber strips 22 will expand after contacting water, thereby filling the gap between the sealing airbag and the wall of the drill hole, enhancing the sealing effect and reducing the risk of water mixing; Example 3

[0114] The difference between this embodiment and the first embodiment is that: the outer surface of the guide head 14 is provided with a protective layer 23, the protective layer 23 wraps the guide head 14, and the protective layer 23 is made of a rubber material or a sponge material; when in use, the guide head 14 can be prevented from being damaged when it moves in the borehole or collides with the borehole wall, and the rubber or sponge material has good elasticity and shock absorption, which can reduce the friction between the guide head 14 and the borehole wall, and reduce the resistance of the guide head 14 to move in the borehole;

[0115] The upper sealing airbag 5 is a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer, which can enhance the sealing and water-stopping effect and reduce the risk of water mixing during pumping. The outer sponge protective layer can protect the inner rubber layer from wear and corrosion, thereby improving the leak-proof performance of the upper sealing airbag 5 and further reducing the risk of water mixing.

[0116] The inner wall of the upper plugging airbag 5 is provided with a reinforcing rib 18 arranged in a threaded pattern. The reinforcing rib 18 is made of rubber material. The reinforcing rib 18 arranged in a threaded pattern can enhance the strength of the upper plugging airbag 5, prevent the upper plugging airbag 5 from rupturing or deforming due to excessive internal pressure when inflated, improve the plugging effect of the upper plugging airbag 5, and further reduce the risk of water mixing;

[0117] A guide head 14 is disposed at the lower end of the lower blocking airbag 13. The cross-sectional diameter of the guide head 14 gradually decreases from one end connected to the lower blocking airbag 13 to the other end. The other end of the guide head 14 is designed as an arc structure, which can make it easier for the guide head 14 to be inserted into the borehole and guide the lower blocking airbag 13 to enter the borehole smoothly. At the same time, the other end of the guide head 14 is an arc structure, which prevents the guide head 14 from being stuck in a bend or narrow part in the borehole.

[0118] The upper detection tube 6 cooperates with the lower detection tube 11 to fix the upper water level gauge 17 and the lower water level gauge 12, which can simplify the installation and maintenance of the upper water level gauge 17 and the lower water level gauge 12, reduce the impact on the upper water level gauge 17 and the lower water level gauge 12, and improve the monitoring stability of the upper water level gauge 17 and the lower water level gauge 12;

[0119] The pumping groove 16 is an arc-shaped structure. There are multiple pumping grooves 16. The design of equidistantly arranged multiple pumping grooves 16 along the circumference of the pumping cylinder 9 can increase the pumping area and increase the pumping speed. At the same time, the pumping force is evenly distributed to prevent the pumping cylinder 9 from being eccentrically stressed and improve the pumping stability.

[0120] The other end of the fixing hook 4 is provided with a supporting spike, which can be inserted into the wall of the drill hole, further increasing the supporting effect of the fixing hook 4, enhancing the fixing effect of the fixing hook 4 on the water pumping pipe 1, maintaining the pumping stability of the water pumping pipe 1, and reducing the risk of water mixing;

[0121] The purpose is to reinforce the pumping pipe 1 by supporting the inner wall of the borehole with the fixed hook 4, and continuously monitor the water levels of the upper and lower aquifers of the pumping layer through the upper water level gauge 17 and the lower water level gauge 12 to prevent water mixing during the pumping process.

[0122] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, a bonding connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] It should be further pointed out that, when describing the above specific embodiments, for the sake of simplicity and clarity, only the differences between the above specific embodiments are described, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

[0124] In actual use, the data processor and controller are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0125] The data processor and controller are not limited to a certain brand and model. As mature products on the market, they can be purchased from the market. Therefore, the present invention does not need to describe the specific structure and shape of the signal converter, data processor and controller. The present invention does not need to explain this. It should be noted that the computer program loaded by the data processor and controller is not within the protection scope of the present invention. The present invention does not protect computer programs. When using the present invention, all computer programs need to be additionally loaded by those skilled in the art. According to the present invention, some steps can be performed sequentially or simultaneously.

Claims

1. A method for using a multi-stage sealing test device for stratified groundwater pumping in a borehole, characterized in that The multi-stage sealing test device for stratified groundwater pumping in a borehole is composed of a pumping monitoring structure, a stabilizing structure and a monitoring structure. The pumping monitoring structure is composed of a pumping pipe, an inflation pipe, an upper blocking airbag, an upper detection tube, a connecting pipe, a pumping sealing airbag, a pumping tube, a middle water level gauge, a lower detection tube, a lower water level gauge, a lower blocking airbag, a pumping trough and an upper water level gauge. The upper blocking airbag sleeve is placed on the pumping pipe and is close to one end of the pumping pipe, and the lower blocking airbag sleeve is placed on the other end of the pumping pipe. The upper blocking airbag and the inflation pipe are connected and communicated. The two pumping sealing airbags are respectively correspondingly placed on the pumping pipe and are located in the middle section of the pumping pipe. There is a distance between the two pumping sealing airbags. The upper blocking airbag and the pumping sealing airbag sleeve are placed on the pumping pipe and are close to one end of the pumping pipe. The lower section sealing airbag is connected through a connecting pipe, the water pumping cylinder is placed on the water pumping pipe and is located between the two water pumping sealing airbags, the water pumping cylinder and the water pumping pipe are connected, the middle water level gauge is placed on the inner ring surface of the water pumping cylinder, and the two planes of the water pumping cylinder are respectively provided with water pumping grooves, the upper detection cylinder is placed on the water pumping pipe and is located between one of the water pumping sealing airbags and the upper section sealing airbag, the upper detection cylinder is connected to the water pumping pipe, the upper water level gauge is placed on the inner ring surface of the upper detection cylinder, the lower detection cylinder is placed on the water pumping pipe and is located between the other water pumping sealing airbag and the lower section sealing airbag, the lower detection cylinder is connected to the water pumping pipe, the lower water level gauge is placed on the inner ring surface of the lower detection cylinder, the stable structure is composed of a mounting seat, a fixing hook and an automatic telescopic rod, and is installed. The mounting seat is placed on the side of the water pumping pipe, one end of the fixed hook is hinged and placed in the mounting seat, the other end of the fixed hook first extends obliquely downward for a distance and then extends obliquely upward in an arc shape, an automatic telescopic rod is placed between the fixed hook and the water pumping pipe, one end of the automatic telescopic rod is fixedly connected or hinged to the side of the water pumping pipe, and the other end of the automatic telescopic rod is hinged to the side of the fixed hook; the monitoring structure is composed of a support column, a monitoring box and an alarm, the monitoring box is placed on the support column, the alarm is placed on the monitoring box, the monitoring box is equipped with a signal converter, the monitoring box is equipped with a data processor, and the monitoring box is equipped with a controller; the outer wall of the upper sealing airbag is equipped with a plurality of water-swellable rubber strips, and the outer wall of the water-pumping sealing airbag is equipped with a plurality of water-swellable rubber strips. The expansion rubber strips are arranged on the outer wall of the lower sealing airbag. The method comprises the following steps: (1) placing the multi-stage sealing test device into the mixed water borehole, and the pumping cylinder reaches the designated pumping layer. During the lowering process, the water level data of the middle water level gauge, the upper water level gauge and the lower water level gauge continuously change. (2) inflating the upper sealing airbag, the pumping sealing airbag and the lower sealing airbag through the inflation pipe and the connecting pipe to seal and isolate the different aquifers in the borehole. After sealing, the water level data of the middle water level gauge, the upper water level gauge and the lower water level gauge tend to be stable. (3) controlling the extension of the automatic telescopic rod, the automatic telescopic rod pushes the fixed hook to extend, and the fixed hook is supported on the wall of the borehole to further limit the pumping pipe.(4) The pumping pipe is connected to the pumping pump to pump water from the aquifer where the pumping cylinder is located. Water enters the pumping cylinder through the pumping trough and flows out through the upper detection cylinder and the pumping pipe, which is convenient for test personnel to sample the target aquifer and observe the permeability of the target aquifer. (5) During the pumping process, the upper water level gauge and the lower water level gauge continuously obtain the water level data of the upper aquifer and the lower aquifer of the target aquifer, and send them to the signal converter. The signal converter converts the electrical signal of the water level data collected by the upper water level gauge and the lower water level gauge into a digital signal and transmits it to the data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented: the digital signals of the water level data received from the middle water level gauge, the upper water level gauge and the lower water level gauge are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge or the lower water level gauge changes too fast within a unit time, it means that During the pumping process, if there is a loose seal between the target aquifer and the upper or lower aquifer, and there is water mixing, the data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a water mixing alarm so that the test personnel can take timely measures to prevent water mixing; (6) During the pumping process, the middle water level meter continuously obtains the water level data of the target aquifer and sends it to the signal converter. The signal converter converts the electrical signal of the water level data collected by the middle water level meter into a digital signal and transmits it to the data processor. The data processor and the signal converter exchange information. The data processor stores a computer-readable storage medium. When the computer-readable storage medium is executed, the following steps are implemented: If the change of the water level data of the middle water level meter within a unit time is lower than the set threshold, or does not change, it means that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a blockage alarm. The test personnel need to take timely treatment measures. ; 2. The method for using the multi-stage sealing test device for stratified groundwater pumping according to claim 1 is characterized in that The other end of the water pumping pipe is a closed structure, the upper sealing airbag is a double-layer structure, and the outer layer is a sponge protective layer, and the inner layer is a rubber layer. The inner wall of the upper sealing airbag is provided with reinforcing ribs arranged in threads, and the reinforcing ribs are made of rubber.

3. The method for using the multi-stage sealing test device for stratified groundwater pumping according to claim 1 is characterized in that The lower section blocking airbag has a double-layer structure, with the outer layer being a sponge protective layer and the inner layer being a rubber layer. The inner wall of the lower section blocking airbag is provided with threaded reinforcing ribs, and the reinforcing ribs are made of rubber. A guide head is provided at the lower end of the lower section blocking airbag, and the cross-sectional diameter of the guide head gradually decreases from one end connected to the lower section blocking airbag to the other end, and the other end of the guide head is an arc-shaped structure.

4. The method for using the multi-stage sealing test device for stratified groundwater pumping according to claim 3 is characterized in that A protective layer is arranged on the outer surface of the guide head, and the protective layer wraps the guide head. The protective layer is made of rubber material or sponge material.

5. The method for using the multi-stage sealing test device for stratified groundwater pumping in a borehole according to claim 1 is characterized in that The water-pumping and sealing airbag is a double-layer structure, with an outer layer being a sponge protective layer and an inner layer being a rubber layer. The inner wall of the water-pumping and sealing airbag is provided with reinforcing ribs arranged in a threaded pattern, and the reinforcing ribs are made of rubber material.

6. The method for using the multi-stage sealing test device for stratified groundwater pumping in a borehole according to claim 1 is characterized in that The water pumping cylinder is an annular cylinder, and the outer annular surface of the water pumping cylinder is connected to the water pumping pipe. The water pumping groove is an arc-shaped structure. There are multiple water pumping grooves, and the multiple water pumping grooves are arranged equidistantly along the circumference of the water pumping cylinder. The upper detection cylinder is an annular cylinder, and the outer annular surface of the upper detection cylinder is connected to the water pumping pipe. The lower detection cylinder is an annular cylinder, and the outer annular surface of the lower detection cylinder is connected to the water pumping pipe.

7. The method for using the multi-stage sealing test device for stratified groundwater pumping in a borehole according to claim 1 is characterized in that There are multiple groups of mounting seats, which are arranged unequally along the axial direction of the water pumping pipe. There are multiple mounting seats in one group, and the multiple mounting seats in the same group are arranged equidistantly along the circumference of the water pumping pipe. The other end of the fixing hook is provided with a supporting spike.

8. The method for using the multi-stage sealing test device for stratified groundwater pumping in a borehole according to claim 1 is characterized in that The signal converter is connected to the data processor via a data line, the data processor is connected to the controller via a data line, the controller is connected to the alarm via a data line, the signal converter and the middle water level gauge establish signal interaction, the middle water level gauge transmits the collected water level signal to the signal converter, the signal converter and the upper water level gauge establish signal interaction, the upper water level gauge transmits the collected water level signal to the signal converter, the signal converter and the lower water level gauge establish signal interaction, the lower water level gauge transmits the collected water level signal to the signal converter, the signal converter converts the electrical signal of the water level data collected by the middle water level gauge, the upper water level gauge and the lower water level gauge into a digital signal, and transmits it to the data processor, the controller is implemented by one or at least two application-specific integrated circuits, programmable logic devices, field programmable gate arrays, and microprocessors, and is used to execute instructions of the data processing device, the data processor and the The signal converter exchanges information, and a computer-readable storage medium is stored in the data processor. When the computer-readable storage medium is executed, the following steps are implemented: the digital signals of the water level data of the middle water level gauge, the upper water level gauge and the lower water level gauge are processed, and the changes of the processed water level data within a unit time are monitored. When the water level data of the upper water level gauge or the lower water level gauge changes too fast within a unit time, it means that during the pumping process, there is a loose seal between the target aquifer and the upper aquifer or the lower aquifer, and there is mixed water. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a mixed water alarm. If the water level data of the middle water level gauge changes less than the set threshold value within a unit time, or does not change, it means that there is a risk of blockage during the pumping process. The data processor sends an execution instruction to the controller, and the controller controls the alarm to issue a blockage alarm.

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