Water stopping device for layered water pumping of hydrogeological drilling

Abstract

The invention belongs to the field of water stopping equipment, and particularly relates to a hydrogeological drilling layered water pumping water stopping device which comprises a water stopping pipe, a water pumping pipe is slidably mounted in the water stopping pipe, a connecting pipe is mounted at the top of the water pumping pipe, mounting flanges are mounted on the connecting pipe and the water pumping pipe, and the two mounting flanges are matched with each other. A plurality of communicating holes are formed in the inner wall of the water pumping pipe at equal intervals, and filter screens are mounted in the communicating holes; a plurality of rectangular grooves are formed in the top of the water stop pipe, rectangular rods are slidably mounted in the rectangular grooves, and the same annular brush plate is fixedly mounted at the tops of the multiple rectangular rods. The device is reasonable in design, the communicating hole can be opened through movement of the water stop pipe to inflate the air bag, the purpose of sealing and water stop can be achieved through expansion of the air bag, meanwhile, the filter screen can be cleaned through up-down reciprocating movement of the annular brush plate, and the situation that the communicating hole is blocked during water pumping is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of water-stop equipment, and particularly relates to a water-stop device for layered pumping of hydrogeological boreholes. Background Technique

[0002] Hydrogeology, a branch discipline of geology, refers to various phenomena of groundwater changes and movements in nature. Hydrogeology is the science of studying groundwater. It mainly studies the distribution and formation laws of groundwater, the physical properties and chemical compositions of groundwater, groundwater resources and their rational utilization, etc. In recent years, the research of hydrogeology has penetrated with the research in aspects such as geothermal energy, earthquake, and environmental geology, and several new fields have been formed. Hydrogeology is further divided into branch disciplines such as regional hydrogeology, groundwater dynamics, hydrogeochemistry, and soil improvement hydrogeology. However, water-stop equipment is required to control the water volume during hydrogeological drilling.

[0003] In hydrogeological exploration work, in order to obtain hydrogeological parameters of different strata, it is often necessary to conduct borehole layered pumping tests. During the pumping process, effective water-stop measures are the key to ensuring accurate acquisition of hydrogeological data of each layer. Existing water-stop devices have some problems in practical applications. For example, the water-stop effect is not good, resulting in interference between the water of different strata and affecting data accuracy; the filter screen is easy to be blocked during the pumping process, affecting the pumping efficiency; the fixing stability of the device in the borehole is insufficient, etc. Therefore, we propose a water-stop device for layered pumping of hydrogeological boreholes to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a water-stop device for layered pumping of hydrogeological boreholes.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solution: A water-stop device for layered pumping of hydrogeological boreholes, including a water-stop pipe. A water extraction pipe is slidably installed in the water-stop pipe. A connecting pipe is installed at the top of the water extraction pipe. Both the connecting pipe and the water extraction pipe are installed with installation flanges, and the two installation flanges are adapted to each other. A plurality of communication holes are equidistantly opened on the inner wall of the water extraction pipe, and filter nets are installed in the communication holes; a plurality of rectangular grooves are opened at the top of the water-stop pipe, rectangular rods are slidably installed in the rectangular grooves, the tops of the plurality of rectangular rods are fixedly installed with the same annular brush plate, and the annular brush plate is adapted to the filter net. A moving hole is opened on one side inner wall of the rectangular groove, a moving seat is slidably installed in the moving hole, a return spring is fixedly installed at the top of the moving seat, and the top end of the return spring is fixedly installed on the top inner wall of the moving hole; On the inner wall of the bottom of the water suction pipe, two push rod motors are fixedly installed. On both inner walls of the water stop pipe, push seats are fixedly installed, and the output shaft of the push rod motor is fixedly connected to the corresponding push seat. At the bottom of the water stop pipe, a fixed rod is fixedly installed, and at the bottom of the fixed rod, a fixed plate is fixedly installed. An airbag is installed between the fixed plate and the water stop pipe; on the inner wall of the bottom of the water stop pipe, a piston cylinder is fixedly installed. A piston plate is slidably installed in the piston cylinder. An air supply pipe is fixedly installed on the outer side of the piston cylinder, and the air supply pipe is communicated with the airbag.

[0006] Preferably, a driving rod is fixedly installed at the top of the piston plate. The tops of multiple driving rods extend above the piston cylinder and are fixedly installed with a driving plate. A linkage mechanism is arranged between the driving plate and the water suction pipe.

[0007] Preferably, the linkage mechanism includes a first rack seat, a second rack seat, a rotating shaft and a rotating gear. Two first rack seats are fixedly installed at the bottom of the water suction pipe. Two second rack seats are fixedly installed at the top of the driving plate. Two rotating shafts are rotatably installed on the front and rear inner walls of the water stop pipe. A rotating gear is fixedly installed on the rotating shaft, and the rotating gear meshes with the corresponding first rack seat and second rack seat.

[0008] Preferably, a plurality of insertion holes are formed in the inner wall of the water stop pipe, and an insertion rod for fixing the water stop pipe is arranged in the insertion hole.

[0009] Preferably, a plurality of vertical rods are fixedly installed at the bottom of the driving plate. One side of the vertical rod is hinged with a hinged rod, and the bottom end of the hinged rod is hinged on the insertion rod.

[0010] Preferably, a partition plate is fixedly installed in the water suction pipe, and the partition plate is located below a plurality of communication holes.

[0011] Preferably, a rotating motor is fixedly installed at the bottom of the water suction pipe, and a reciprocating lead screw is fixedly installed on the output shaft of the rotating motor.

[0012] Preferably, a lifting plate is slidably installed in the water suction pipe, and the lifting plate is threadedly sleeved on the reciprocating lead screw.

[0013] Preferably, sliding grooves are formed on both sides of the water suction pipe. The sliding grooves extend to the lifting plate. A trapezoidal seat adapted to the moving seat is slidably installed in the sliding groove. One side of the trapezoidal seat is fixedly installed with a fixed spring, and one end of the fixed spring is fixedly installed on the inner wall of the sliding groove.

[0014] Preferably, a plurality of limiting rods are fixedly installed at the bottom of the partition plate, and the lifting plate is slidably sleeved on the limiting rods.

[0015] The beneficial effects of the present invention: 1. The water extraction pipe can be connected to the connecting pipe through the installation flange. The water stop pipe and the water extraction pipe can be inserted into the hydrogeological borehole through the connecting pipe. When the water stop pipe reaches the designated position, by starting the push rod motor, the push rod motor can drive the push seat and the water stop pipe to move downward through the output shaft. When the water stop pipe moves to below the communication hole, the purpose of opening the communication hole can be achieved. 2. When the water stop pipe moves downward, the water stop pipe can drive the rotating shaft and the rotating gear to move downward. Under the action of the rack seat 1, the rotating gear can move and rotate while moving. The rotating gear can drive the rack seat 2 to move downward. The rack seat 2 can drive the driving plate to move downward. The driving plate drives the piston plate to move downward through the driving rod. The piston plate can inject the gas in the piston cylinder into the airbag through the air supply pipe. The purpose of sealing and stopping water can be achieved through the expansion of the airbag. 3. The driving plate can drive the vertical rod to move. The vertical rod can drive the insertion rod to move through the hinge rod, so that the insertion rod can be inserted into the hole, and the purpose of increasing the stability of the water stop pipe can be achieved. 4. Through the communication hole, the purpose of layered pumping of the hole can be achieved. The rotary motor drives the lifting disc to move up and down reciprocally through the compound screw rod. Through the cooperation of the lifting disc, trapezoidal seat, moving seat, rectangular rod, annular brush plate and return spring, the annular brush plate can move up and down reciprocally, and the purpose of cleaning the filter screen can be achieved, avoiding the situation of blockage when pumping water through the communication hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 2 is a sectional three-dimensional structural schematic diagram of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 3 is a partial bottom-up three-dimensional structural schematic diagram of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 4 is a structural schematic diagram of part A of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 5 is a partial three-dimensional structural schematic diagram of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 6 is a structural schematic diagram of part B of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 7 is a structural schematic diagram of part C of a water stop device for layered pumping of hydrogeological boreholes proposed by the present invention; Figure 8Schematic diagram of part D of a water-stop device for layered pumping of a hydrogeological borehole proposed by the present invention.

[0017] In the figure: 101, water-stop pipe; 102, water extraction pipe; 103, connecting pipe; 104, installation flange; 201, communication hole; 202, filter screen; 203, rectangular groove; 204, rectangular rod; 205, annular brush plate; 301, moving hole; 302, moving seat; 303, return spring; 304, partition plate; 305, lifting plate; 306, rotating motor; 307, reciprocating lead screw; 401, sliding groove; 402, trapezoidal seat; 403, fixing spring; 501, push rod motor; 502, pushing seat; 601, piston cylinder; 602, piston plate; 603, air supply pipe; 604, airbag; 605, driving rod; 606, driving plate; 701, second rack seat; 702, rotating shaft; 703, rotating gear; 704, first rack seat; 801, vertical rod; 802, hinged rod; 803, jack; 804, inserting rod; 901, fixing rod; 902, fixing plate. Detailed implementation manners

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0019] When a component is referred to as being "arranged on" another component, it can be directly on the other component or there can also be an intermediate component. "Arranged" represents a way of existence, which can be connection, installation, fixed connection, active connection and other connection methods. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific implementation manners, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Refer to Figure 1-8, A water stop device for layered pumping of a hydrogeological borehole, including a water stop pipe 101. A water extraction pipe 102 is slidably installed inside the water stop pipe 101. A connecting pipe 103 is installed at the top of the water extraction pipe 102. Installation flanges 104 are installed on both the connecting pipe 103 and the water extraction pipe 102, and the two installation flanges 104 are adapted to each other. A plurality of communication holes 201 are equidistantly arranged on the inner wall of the water extraction pipe 102, and filter nets 202 are installed in the communication holes 201; a plurality of rectangular grooves 203 are opened at the top of the water stop pipe 101. A rectangular rod 204 is slidably installed in the rectangular groove 203. The tops of the plurality of rectangular rods 204 are fixedly installed with the same annular brush plate 205, and the annular brush plate 205 is adapted to the filter net 202. A moving hole 301 is opened on one inner wall of the rectangular groove 203. A moving seat 302 is slidably installed in the moving hole 301. A return spring 303 is fixedly installed at the top of the moving seat 302, and the top end of the return spring 303 is fixedly installed on the top inner wall of the moving hole 301; two push rod motors 501 are fixedly installed on the bottom inner wall of the water extraction pipe 102. Push seats 502 are fixedly installed on both inner walls of the water stop pipe 101, and the output shafts of the push rod motors 501 are fixedly connected to the corresponding push seats 502. A fixing rod 901 is fixedly installed at the bottom of the water stop pipe 101. A fixing plate 902 is fixedly installed at the bottom of the fixing rod 901. An air bag 604 is installed between the fixing plate 902 and the water stop pipe 101; a piston cylinder 601 is fixedly installed on the bottom inner wall of the water stop pipe 101. A piston plate 602 is slidably installed in the piston cylinder 601. An air supply pipe 603 is fixedly installed on the outside of the piston cylinder 601, and the air supply pipe 603 is communicated with the air bag 604.

[0022] In this embodiment, a driving rod 605 is fixedly installed at the top of the piston plate 602. The tops of the plurality of driving rods 605 extend above the piston cylinder 601 and are fixedly installed with a driving plate 606. A linkage mechanism is arranged between the driving plate 606 and the water extraction pipe 102. The linkage mechanism includes a first rack seat 704, a second rack seat 701, a rotating shaft 702 and a rotating gear 703. Two first rack seats 704 are fixedly installed at the bottom of the water extraction pipe 102. Two second rack seats 701 are fixedly installed at the top of the driving plate 606. Two rotating shafts 702 are rotatably installed on the front and rear inner walls of the water stop pipe 101. A rotating gear 703 is fixedly installed on the rotating shaft 702, and the rotating gear 703 meshes with the corresponding first rack seat 704 and second rack seat 701. Through this linkage mechanism, when the water extraction pipe 102 moves under the action of the push rod motor 501, it can synchronously drive the piston plate 602 to move, realizing the inflation operation of the air bag 604. It cleverly utilizes the moving power of the water extraction pipe 102 to realize the coordination of the water stop and water extraction actions, without the need for an additional power source to control the inflation of the air bag 604, simplifies the device structure, improves the energy utilization efficiency, and at the same time enhances the stability and reliability of the device operation.

[0023] In this embodiment, a plurality of jacks 803 are provided on the inner wall of the water stop pipe 101. An insertion rod 804 for fixing the water stop pipe 101 is provided in the jack 803. A plurality of vertical rods 801 are fixedly installed at the bottom of the driving plate 606. One side of the vertical rod 801 is hinged with a hinge rod 802, and the bottom end of the hinge rod 802 is hinged on the insertion rod 804. When the driving plate 606 moves under the action of the linkage mechanism, the insertion rod 804 can be driven to move through the vertical rod 801 and the hinge rod 802, so that the insertion rod 804 is inserted into the drilling wall, thereby enhancing the fixing stability of the water stop pipe 101 in the drilling. It effectively avoids the situation that the water stop pipe 101 is displaced due to water flow impact or the vibration of the device itself during the pumping process, ensures that the device can stably pump water from a specific formation, improves the accuracy and reliability of the pumping test data, and provides a strong guarantee for obtaining accurate hydrogeological parameters.

[0024] In this embodiment, a partition plate 304 is fixedly installed in the water extraction pipe 102. The partition plate 304 is located below the plurality of communication holes 201. A rotary motor 306 is fixedly installed at the bottom of the water extraction pipe 102. A reciprocating lead screw 307 is fixedly installed on the output shaft of the rotary motor 306. A lifting disc 305 is slidably installed in the water extraction pipe 102. The lifting disc 305 is threadedly sleeved on the reciprocating lead screw 307. The setting of the partition plate 304 can prevent the extracted water from being overly mixed in the water extraction pipe 102 and ensure that the water extracted is from a specific formation. The rotary motor 306 drives the reciprocating lead screw 307 to rotate, and then drives the lifting disc 305 to move up and down, providing power support for the subsequent operation of cleaning the filter screen, improving the accuracy of stratified water extraction, making the obtained hydrogeological data more targeted, and at the same time providing an effective power driving method for the filter screen cleaning structure, ensuring that the entire device can operate continuously and efficiently.

[0025] In this embodiment, sliding grooves 401 are provided on both sides of the water extraction pipe 102. The sliding grooves 401 extend to the lifting disc 305. A trapezoidal seat 402 adapted to the moving seat 302 is slidably installed in the sliding grooves 401. A fixing spring 403 is fixedly installed on one side of the trapezoidal seat 402. One end of the fixing spring 403 is fixedly installed on the inner wall of the sliding groove 401. When the lifting disc 305 moves up and down, it can drive the trapezoidal seat 402 to move. The trapezoidal seat 402 can cooperate with the moving seat 302 at a specific position, thereby realizing the up and down movement of the annular brush plate 205 to clean the filter screen. It cleverly utilizes the movement of the lifting disc 305 to realize the automatic cleaning function of the filter screen through a simple mechanical structure, avoiding the cumbersome operation of manual cleaning of the filter screen, improving the pumping efficiency, reducing the interruption of water extraction caused by filter screen blockage, and prolonging the continuous working time of the device.

[0026] In this embodiment, a plurality of limiting rods are fixedly installed at the bottom of the partition plate 304, and the lifting disc 305 is slidably sleeved on the limiting rods. The limiting rods can limit the movement track of the lifting disc 305, so that it remains stable during the up and down movement, avoiding the deviation or shaking of the lifting disc 305, thereby ensuring the accurate cooperation between the trapezoidal seat 402 and the moving seat 302, guaranteeing the smooth progress of the filter screen cleaning work, improving the stability and reliability of the operation of the filter screen cleaning structure, ensuring the consistency of the cleaning effect, and further enhancing the performance and service life of the entire device.

[0027] In the present invention, the water extraction pipe 102 can be connected to the connecting pipe 103 through the installation flange 104. Through the connecting pipe 103, the water stop pipe 101 and the water extraction pipe 102 can be inserted into the hydrogeological borehole. When the water stop pipe 101 reaches the designated position, by starting the push rod motor 501, the push rod motor 501 can drive the push seat 502 and the water stop pipe 101 to move downward through the output shaft. By moving the water stop pipe 101 below the communication hole 201, the purpose of opening the communication hole 201 can be achieved. When the water stop pipe 101 moves downward, the water stop pipe 101 can drive the rotating shaft 702 and the rotating gear 703 to move downward. Under the action of the rack seat one 704, the rotating gear 703 can move while rotating itself. The rotating gear 703 can drive the rack seat two 701 to move downward. The rack seat two 701 can drive the driving plate 606 to move downward. The driving plate 606 drives the piston plate 602 to move downward through the driving rod 605. The piston plate 602 can inject the gas in the piston cylinder 601 into the airbag 604 through the air supply pipe 603. Through the inflation of the airbag 604, the purpose of sealing and stopping water can be achieved; The driving board 606 can drive the vertical rod 801 to move. The vertical rod 801 can drive the insertion rod 804 to move through the hinge rod 802, so that the insertion rod 804 can be inserted into the hole, achieving the purpose of increasing the stability of the water stop pipe 101. Through the communication hole 201, the purpose of pumping water in layers in the hole can be achieved. By starting the rotary motor 306, the rotary motor 306 can drive the reciprocating lead screw 307 to rotate. The reciprocating lead screw 307 can drive the lifting plate 305 to move up and down reciprocally. The lifting plate 305 can drive the trapezoidal seat 402 to move upward. When the trapezoidal seat 402 moves to one side of the moving hole 301, the fixed spring 403 can push the trapezoidal seat 402 into the moving hole 301. At this time, the trapezoidal seat 402 can be located below the moving seat 302. Thus, when the lifting plate 305 moves upward, the lifting plate 305 can drive the moving seat 302, the rectangular rod 204, and the annular brush plate 205 to move upward through the trapezoidal seat 402. When the lifting plate moves downward, the return spring 303 can push the moving seat 302, the rectangular rod 204, and the annular brush plate 205 to reset. Through the up and down reciprocating movement of the annular brush plate 205, the cleaning of the filter screen 202 can be realized, avoiding the blockage when pumping water through the communication hole 201.

[0028] The above has introduced in detail a water stop device for layered pumping of hydrogeological boreholes provided by the present invention. Specific embodiments are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A water-stopping device for hydrogeological drilling stratification pumping, characterized in that: It comprises a water stop pipe (101), a water pumping pipe (102) is slidably installed in the water stop pipe (101), a connecting pipe (103) is installed on the top of the water pumping pipe (102), the connecting pipe (103) and the water pumping pipe (102) are both installed with mounting flanges (104), and the two mounting flanges (104) are adapted to each other, a plurality of communication holes (201) are opened on the inner wall of the water pumping pipe (102) at equal intervals, and a filter screen (202) is installed in the communication hole (201); A plurality of rectangular grooves (203) are provided on the top of the water stop pipe (101), a rectangular rod (204) is slidably mounted in the rectangular groove (203), a same annular brush plate (205) is fixedly mounted on the top of the plurality of rectangular rods (204), and the annular brush plate (205) is adapted to the filter screen (202), a movable hole (301) is provided on the inner wall of one side of the rectangular groove (203), a movable seat (302) is slidably mounted in the movable hole (301), a return spring (303) is fixedly mounted on the top of the movable seat (302), and the top end of the return spring (303) is fixedly mounted on the top inner wall of the movable hole (301); Two push rod motors (501) are fixedly mounted on the inner wall at the bottom of the water pumping pipe (102); push seats (502) are fixedly mounted on the inner walls on both sides of the water stop pipe (101); the output shafts of the push rod motors (501) are fixedly connected to the corresponding push seats (502); a fixing rod (901) is fixedly mounted on the bottom of the water stop pipe (101); a fixing plate (902) is fixedly mounted on the bottom of the fixing rod (901); and an air bag (604) is mounted between the fixing plate (902) and the water stop pipe (101); A piston cylinder (601) is fixedly mounted on the inner wall of the bottom of the water stop tube (101), a piston plate (602) is slidably mounted inside the piston cylinder (601), an air supply pipe (603) is fixedly mounted on the outer side of the piston cylinder (601), and the air supply pipe (603) is in communication with the air bag (604).

2. A water-stopping device for hydrogeological drilling stratification pumping according to claim 1, characterized in that: A driving rod (605) is fixedly mounted on the top of the piston plate (602). The tops of the plurality of driving rods (605) extend above the piston cylinder (601) and are fixedly mounted with a driving plate (606). A linkage mechanism is provided between the driving plate (606) and the water pumping pipe (102).

3. A water-stopping device for hydrogeological drilling stratification pumping according to claim 2, characterized in that: The linkage mechanism comprises a rack seat 1 (704), a rack seat 2 (701), a rotating shaft (702) and a rotating gear (703); two rack seats 1 (704) are fixedly mounted on the bottom of the water pumping pipe (102); two rack seats 2 (701) are fixedly mounted on the top of the driving plate (606); two rotating shafts (702) are rotatably mounted on the front and rear inner walls of the water stop pipe (101); a rotating gear (703) is fixedly mounted on the rotating shaft (702), and the rotating gear (703) is meshed with the corresponding rack seat 1 (704) and rack seat 2 (701).

4. A water-stopping device for hydrogeological drilling stratification pumping according to claim 1, characterized in that: A plurality of insertion holes (803) are provided on the inner wall of the water stop pipe (101), and insertion rods (804) for fixing the water stop pipe (101) are provided in the insertion holes (803).

5. A water-stopping device for hydrogeological drilling stratification pumping according to claim 2, characterized in that: A plurality of vertical rods (801) are fixedly mounted on the bottom of the driving plate (606), a hinged rod (802) is hinged on one side of the vertical rod (801), and the bottom end of the hinged rod (802) is hinged on the insertion rod (804).

6. A water-stopping device for hydrogeological drilling stratification pumping according to claim 1, characterized in that: A partition plate (304) is fixedly installed in the water pumping pipe (102), and the partition plate (304) is located below the plurality of communication holes (201).

7. A water-stopping device for hydrogeological drilling stratification pumping according to claim 6, characterized in that: A rotating motor (306) is fixedly mounted on the bottom of the water pumping pipe (102), and a reciprocating screw rod (307) is fixedly mounted on the output shaft of the rotating motor (306).

8. A water-stopping device for hydrogeological drilling stratification pumping according to claim 7, characterized in that: A lifting plate (305) is slidably mounted in the water pumping pipe (102), and the lifting plate (305) is threadedly sleeved on the reciprocating screw rod (307).

9. A water-stopping device for hydrogeological drilling stratified water pumping according to claim 7, characterized in that: Sliding grooves (401) are provided on both sides of the water pumping pipe (102). The sliding grooves (401) extend to the lifting plate (305). A trapezoidal seat (402) adapted to the movable seat (302) is slidably installed in the sliding grooves (401). A fixing spring (403) is fixedly installed on one side of the trapezoidal seat (402). One end of the fixing spring (403) is fixedly installed on the inner wall of the sliding groove (401).

10. A water-stopping device for hydrogeological drilling stratified water pumping according to claim 8, characterized in that: A plurality of limiting rods are fixedly mounted on the bottom of the partition (304), and the lifting plate (305) is slidably sleeved on the limiting rods.

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