Mobile underground runoff driven submersible pump for recharging well

Abstract

The present invention provides a mobile underground runoff-driven submersible pump for a recharge well, comprising a pump body and a sealing mechanism. The pump body has a water inlet and a water outlet located below the water inlet. The sealing mechanism is fixedly connected to the pump body, and has a drainage channel connected to the water outlet, and the bottom end of the sealing mechanism is provided with a drainage port connected to the drainage channel. The sealing mechanism can contact the inner wall of the recharge well after expansion to be fixed in the recharge well, and separate the recharge well into a drainage space connected to the underground aquifer and an inlet space located above the drainage space and for the pump body to be placed. The mobile underground runoff-driven submersible pump for a recharge well provided by the present invention can be pressurized in a way that allows the recharge water to quickly flow back to the underground aquifer, which can accelerate the runoff of the underground aquifer, while ensuring the heat exchange effect and the recharge efficiency of the recharge water, and has strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of pump equipment, and in particular relates to a mobile downhole runoff driven submersible pump for a recharging well. Background Art

[0002] Geothermal water refers to water with a higher temperature formed by geothermal heating deep underground. It is a renewable energy source and can be used for heating. In order to maintain the sustainability of geothermal resources, recharge wells are usually set up to allow the low-temperature geothermal water to flow back into the underground aquifer after the heat is collected to maintain the reservoir pressure.

[0003] In the prior art, more geothermal water is collected in cold seasons, so the amount of recharged water is also relatively large, which requires timely recharge of the used geothermal water into the underground aquifer. In this process, the geothermal water recharged into the recharge well usually only penetrates into the underground aquifer gradually by the action of water pressure, and the recharge speed is slow, so it is necessary to open multiple recharge wells to work together. This method undoubtedly increases the construction cost and subsequent maintenance cost, and the runoff effect of the underground aquifer is poor. The recharged water cannot be quickly mixed with the geothermal water in the underground aquifer, which will affect the heat exchange effect, and thus cannot ensure that the geothermal water maintains a constant heat for a long time. Summary of the invention

[0004] The embodiment of the present invention provides a mobile downhole runoff driven submersible pump for a recharging well, aiming to achieve the purpose of quickly transporting the recharging water to an underground aquifer.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a mobile downhole runoff driven submersible pump for a recharging well, comprising:

[0006] A pump body having a water inlet and a water outlet located below the water inlet;

[0007] A sealing mechanism is fixedly connected to the pump body and has a drainage channel connected to the water outlet. The bottom end of the sealing mechanism is provided with a drainage port connected to the drainage channel. The sealing mechanism is used to contact the inner wall of the recharge well after expansion so as to be fixed in the recharge well, and separate the recharge well into a drainage space connected to the underground aquifer and an inlet space located above the drainage space and for the pump body to be placed.

[0008] In a possible implementation, the mobile downhole runoff-driven submersible pump for the recharging well further includes a cable, which is connected to the pump body and is used to lower the combination of the pump body and the sealing mechanism to a position above the underground aquifer corresponding to the recharging well.

[0009] In a possible implementation, the sealing mechanism includes:

[0010] A fixed pipe is arranged along the vertical direction, and the top end is fixedly connected to the water outlet; a fixed ring plate is coaxially arranged at the bottom end of the fixed pipe;

[0011] A movable circular plate is arranged below the fixed ring plate and coaxially arranged with the fixed ring plate;

[0012] A sliding ring is located above the fixed ring plate and is slidably sleeved on the fixed tube;

[0013] A plurality of sliding columns are provided, each of which is arranged in an annular space around the axis of the fixed tube, the central axis of each sliding column is arranged parallel to the axis of the fixed tube, and the top end of each sliding column is fixedly connected to the sliding ring, and the bottom end passes through the sliding hole on the fixed ring plate and is fixedly connected to the movable circular plate;

[0014] A first spring is located between the sliding ring and the fixed ring plate and is sleeved on the fixed tube, and is used to continuously bounce the sliding ring so that the sliding ring has a tendency to maintain an upward movement;

[0015] The expansion assembly is fixed on the fixed pipe and located above the fixed ring plate, and is used for contacting the inner wall of the reinjection well after expansion to seal the reinjection well.

[0016] In a possible implementation, a bottom surface of the fixed ring plate and a top surface of the movable circular plate are both covered with a sealing rubber pad.

[0017] In a possible implementation, the expansion assembly includes:

[0018] An upper annular plate body is coaxially sleeved on the fixed tube;

[0019] A lower annular plate body is coaxially sleeved on the fixed tube and is located below the upper annular plate body;

[0020] A rubber sleeve is annularly arranged on the outside of the fixed tube, with the top end fixedly connected to the upper annular plate body and the bottom end connected to the lower annular plate body, wherein the rubber sleeve, the upper annular plate body and the lower annular plate body enclose an annular expansion chamber;

[0021] The pressurizing structure is communicated with the annular expansion chamber through a liquid injection port arranged on the upper annular plate body.

[0022] In a possible implementation, the expansion assembly further includes an upper positioning structure;

[0023] The lower plate surface of the upper annular plate body is provided with a plurality of first circular grooves, and each of the first circular grooves is arranged at an annular interval around the axis of the upper annular plate body; a plurality of first sliding cavities are also provided in the upper annular plate body, each of the first sliding cavities corresponds to each of the first circular grooves one by one, and each of the first sliding cavities is arranged along the radial direction of the upper annular plate body, and one end of each of the first sliding cavities is connected to the corresponding first circular groove, and the other end passes through the outer edge of the upper annular plate body;

[0024] Among them, the upper positioning structure includes multiple first positioning slide rods, each of which is slidably arranged in each of the first slide cavities, and each of the first positioning slide rods has a first piston part that is sealingly and slidably connected to the first slide cavity at one end close to the first circular groove.

[0025] In a possible implementation, the expansion assembly further includes a lower positioning structure;

[0026] The upper plate surface of the lower annular plate body is provided with a plurality of second circular grooves, and each of the second circular grooves is arranged at an annular interval around the axis of the lower annular plate body; a plurality of second sliding cavities are also provided in the lower annular plate body, each of the second sliding cavities corresponds to each of the second circular grooves one by one, and each of the second sliding cavities is arranged along the radial direction of the lower annular plate body, and one end of each of the second sliding cavities is connected to the corresponding second circular groove, and the other end passes through the outer edge of the lower annular plate body;

[0027] Among them, the lower positioning structure includes a plurality of second positioning slide rods, each of which is slidably arranged in each of the second slide cavities, and each of the second positioning slide rods is provided with a second piston portion sealingly and slidably connected to the second slide cavity at one end close to the second circular groove.

[0028] In a possible implementation, the expansion assembly further includes a pressurized self-locking structure, and the pressurized self-locking structure includes:

[0029] There are multiple upper cylinders, each of which is fixedly connected to the lower plate surface of the upper annular plate body, and the axis is arranged along the vertical direction and is connected to each of the first circular grooves one by one; a first circular hole is provided on the side wall of each upper cylinder;

[0030] There are multiple lower cylinders, each of which is fixedly connected to the upper plate surface of the annular plate body, and the axis is arranged along the vertical direction; each of the lower cylinders is arranged in a one-to-one correspondence with each of the upper cylinders, and each of the lower cylinders is connected to each of the second circular grooves;

[0031] A plurality of sliding tubes are provided, each of which is arranged in one-to-one correspondence with each of the lower cylinders, and the axes are all arranged along the vertical direction; the top end of each sliding tube passes through the sealing hole provided on the lower annular plate body and then sequentially passes through the corresponding second circular groove, the corresponding cylinder cavity of the lower cylinder and the corresponding annular expansion cavity, and then extends into the corresponding upper cylinder; a limiting cap is provided at the bottom end of the sliding tube, and a limiting ring that can contact the top end of the corresponding lower cylinder is provided on the sliding tube; a second circular hole that can communicate with the corresponding second sliding cavity is provided on the side wall of the sliding tube;

[0032] A plurality of second springs are provided, each of which is sleeved on each of the sliding tubes, one end of each of the springs abuts against the lower plate surface of the lower annular plate body, and the other end abuts against the corresponding limiting cap;

[0033] Wherein, each of the sliding tubes has a normal pressure state and a pressurized state; in the normal pressure state, each of the second springs bounces each of the limiting rings to make each of the sliding tubes move downward until each of the limiting rings abuts against the corresponding lower cylinder, so that each of the sliding tubes is connected to the corresponding second sliding cavity through its own second circular hole, so that the top end of each of the sliding tubes is located below each of the first circular holes; in the pressurized state, each of the sliding tubes moves upward after receiving the reverse pressure from the drainage space, closing the connection between each of the second circular holes and the corresponding second sliding cavities, and moving the top end of each sliding tube to above each of the first circular holes, closing the connection between each of the first sliding cavities and the corresponding first circular holes.

[0034] In a possible implementation, the expansion assembly also includes a plurality of tie rods, each of which is arranged in the annular expansion chamber at an annular interval around the axis of the fixed tube, and one end of each tie rod is fixedly connected to the upper annular plate body, and the other end is fixedly connected to the lower annular plate body.

[0035] In the present implementation, the combination of the pump body and the sealing mechanism can be placed above the underground aquifer corresponding to the recharge well and fixed to the recharge well. The recharge water pressure entering the water inlet space from above is delivered to the drainage space through the reverse delivery of the pump body. The recharge water is quickly returned to the underground aquifer by means of pressurization of the pump body, which can accelerate the runoff of the underground aquifer, while ensuring the heat exchange effect and the recharge efficiency of the recharge water, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a mobile downhole runoff driven submersible pump for a recharging well provided in an embodiment of the present invention Figure 1 ;

[0037] Figure 2A schematic diagram of the structure of a mobile downhole runoff driven submersible pump for a recharging well provided in an embodiment of the present invention Figure 2 (Hide rubber cover);

[0038] Figure 3 for Figure 1 A schematic diagram of the main structure of a mobile downhole runoff driven submersible pump for a recharging well provided in an embodiment;

[0039] Figure 4 A partial cross-sectional structural schematic diagram of a sealing mechanism of a mobile downhole runoff driven submersible pump for a recharging well provided by an embodiment of the present invention;

[0040] Description of reference numerals:

[0041] 10. Pump body;

[0042] 20. Sealing mechanism; 21. Fixed tube; 22. Moving circular plate; 23. Sliding ring; 24. Sliding column; 25. First spring; 26. Expansion assembly; 261. Upper annular plate; 2611. First circular groove; 2612. First sliding cavity; 262. Lower annular plate; 2621. Second circular groove; 2622. Second sliding cavity; 263. Rubber sleeve; 264. Pressurization structure; 265. First positioning slide rod; 266. Second positioning slide rod; 267. Self-locking structure; 2671. Upper cylinder; 2672. Lower cylinder; 2673. Sliding tube; 2674. Second spring; 2675. First circular hole; 2676. Second circular hole; 2677. Limiting cap; 2678. Limiting ring; 27. Fixed ring plate; 28. Sealing rubber pad;

[0043] 30. Cable;

[0044] 40. Recharge well; 41. Drainage space; 42. Water inlet space. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] Please also read Figure 1 and Figure 2, the mobile downhole runoff driving submersible pump for the recharge well 40 provided by the present invention is now described. The mobile downhole runoff driving submersible pump for the recharge well 40 comprises a pump body 10 and a sealing mechanism 20. The pump body 10 has a water inlet and a water outlet located below the water inlet. The sealing mechanism 20 is fixedly connected to the pump body 10, and has a drainage channel connected to the water outlet, and the bottom end of the sealing mechanism 20 is provided with a drainage port connected to the drainage channel. The sealing mechanism 20 can contact the inner wall of the recharge well 40 after expansion, so as to be fixed in the recharge well 40, and separate the recharge well 40 into a drainage space 41 connected to the underground aquifer and an inlet space 42 located above the drainage space 41 and for the pump body 10 to be placed.

[0047] The recharge well 40 provided in this embodiment uses a mobile downhole runoff to drive a submersible pump. Compared with the prior art, the combination of the pump body 10 and the sealing mechanism 20 can be placed above the underground aquifer corresponding to the recharge well 40 and fixed to the recharge well 40. Through the reverse delivery of the pump body 10, the recharge water pressure entering the water inlet space 42 from above is delivered to the drainage space 41. The recharge water is quickly returned to the underground aquifer by the pressurization of the pump body 10, which can accelerate the runoff of the underground aquifer, while ensuring the heat exchange effect and the reinjection efficiency of the recharge water, and has strong practicality.

[0048] It should be noted that the use of the mobile downhole runoff-driven submersible pump for the recharge well 40 provided in this embodiment is that it can be lowered into the recharge well 40 and located above the underground aquifer during the heating season or time periods when the use of geothermal water is large. It is fixed by the sealing mechanism 20 and then the pump body 10 is started. The pump body 10 transmits the recharge water pressure entering the water inlet space 42 to the drainage space 41, and by pressurizing the drainage space 41, the recharge water can quickly flow into the underground aquifer to ensure the downhole runoff effect.

[0049] In some embodiments, see Figure 3 The mobile downhole runoff-driven submersible pump for the recharging well 40 also includes a cable 30 , which is connected to the pump body 10 and can lower the combination of the pump body 10 and the sealing mechanism 20 to a position above the underground aquifer corresponding to the recharging well 40 .

[0050] The arrangement of the cable 30 can ensure that the combination of the main body and the sealing mechanism 20 can be easily taken and placed, and the cable 30 can also ensure the binding of the power transmission line, facilitate the stable operation of the pump body 10 and the sealing mechanism 20, and also ensure the accuracy of the lowering position of the two.

[0051] In some embodiments, the sealing mechanism 20 may be implemented as follows: Figure 2 and Figure 3 See the structure shown. Figure 2 and Figure 3 The sealing mechanism 20 includes a fixed tube 21, a movable circular plate 22, a sliding ring 23, a sliding column 24, a first spring 25 and an expansion assembly 26. The fixed tube 21 is arranged along the vertical direction, and the top end is fixedly connected to the water outlet. A fixed ring plate 27 is coaxially arranged at the bottom end of the fixed tube 21. The movable circular plate 22 is arranged below the fixed ring plate 27 and is coaxially arranged with the fixed ring plate 27. The sliding ring 23 is located above the fixed ring plate 27 and is slidably sleeved on the fixed tube 21. There are a plurality of sliding columns 24, each of which is arranged at an annular interval around the axis of the fixed tube 21, and the central axis of each sliding column 24 is arranged parallel to the axis of the fixed tube 21, and the top end of each sliding column 24 is fixedly connected to the sliding ring 23, and the bottom end passes through the sliding hole on the fixed ring plate 27 and is fixedly connected to the movable circular plate 22. The first spring 25 is located between the sliding ring 23 and the fixed ring plate 27, and is sleeved on the fixed pipe 21, and can continuously bounce the sliding ring 23 so that the sliding ring 23 has a tendency to keep moving upward. The expansion assembly 26 is fixed on the fixed pipe 21 and located above the fixed ring plate 27, and can contact the inner wall of the recharging well 40 after expansion to block the recharging well 40.

[0052] The fixed pipe 21 can ensure fixed connection with the water outlet, that is, it is connected with the water outlet on the pump body 10 by means of threads or flanges. A fixed ring plate 27 is arranged at the bottom end of the fixed pipe 21, and a sliding hole is arranged on the fixed ring plate 27 for sliding of each slide column 24. The two ends of each slide rod are respectively connected to the moving circular plate 22 and the sliding ring 23. Under the springing of the first spring 25, the sliding ring 23 moves upward, and then drives the moving circular plate 22 upward through each slide column 24 to abut against the fixed ring plate 27, so as to block the bottom end port of the fixed pipe 21. When the pump body 10 stops running, or the water pressure in the drainage space 41 is higher than the head of the water pump, under the springing of the first spring 25, the moving circular plate 22 will contact the fixed ring plate 27, that is, the port at the bottom end of the fixed pipe 21 will be blocked to prevent the water in the underground aquifer from spraying out in reverse, improve safety, and ensure the runoff effect of the well to a certain extent. The expansion assembly 26 can ensure that it abuts against the inner wall of the reinjection well 40 after expansion, and at the same time block the reinjection, thereby ensuring that the reinjection well 40 is separated into a water inlet space 42 and a drainage space 41.

[0053] In some embodiments, the fixed ring plate 27 and the movable circular plate 22 may be formed as follows: Figure 3 See the structure shown. Figure 3 The bottom surface of the fixed ring plate 27 and the top surface of the movable circular plate 22 are both covered with a sealing rubber pad 28. The setting of the sealing rubber pad 28 can effectively ensure the sealing effect of the two after they are matched. The structure is simple and easy to manufacture.

[0054] In some embodiments, the expansion assembly 26 may be implemented as follows: Figure 2 and Figure 4 See the structure shown. Figure 2 and Figure 4 The expansion assembly 26 includes an upper annular plate 261, a lower annular plate 262, a rubber sleeve 263 and a pressurizing structure 264. The upper annular plate 261 is coaxially sleeved on the fixed tube 21. The lower annular plate 262 is coaxially sleeved on the fixed tube 21 and is located below the upper annular plate 261. The rubber sleeve 263 is annularly arranged on the outside of the fixed tube 21, with the top end fixedly connected to the upper annular plate 261 and the bottom end connected to the lower annular plate 262. The rubber sleeve 263, the upper annular plate 261 and the lower annular plate 262 enclose an annular expansion chamber. The pressurizing structure 264 is connected to the annular expansion chamber through a liquid injection port arranged on the upper annular plate 261.

[0055] An annular open space can be formed between the upper annular plate body 261 and the lower annular plate body 262, and the two can facilitate the fixed connection of the rubber sleeve 263. At the same time, the expanded rubber sleeve 263 can be limited in the axial direction of the fixed tube 21 to ensure that the rubber sleeve 263 only extends outward along the radial direction of the fixed tube 21 after expansion, thereby ensuring the sealing effect.

[0056] The boosting structure 264 may be a hydraulic pump disposed at the wellhead, and the rubber sleeve 263 may be expanded by injecting hydraulic liquid into the annular expansion chamber.

[0057] In some embodiments, the expansion assembly 26 may be implemented as follows: Figure 2 and Figure 4 See the structure shown. Figure 2 and Figure 4 , the expansion assembly 26 also includes an upper positioning structure.

[0058] Specifically, the lower plate surface of the upper annular plate body 261 is provided with a plurality of first circular grooves 2611, and each first circular groove 2611 is arranged at an annular interval around the axis of the upper annular plate body 261. A plurality of first sliding cavities 2612 are also provided in the upper annular plate body 261, and each first sliding cavity 2612 corresponds to each first circular groove 2611 one by one, and each first sliding cavity 2612 is arranged along the radial direction of the upper annular plate body 261, and one end of each first sliding cavity 2612 is connected to the corresponding first circular groove 2611, and the other end passes through the outer edge of the upper annular plate body 261.

[0059] Specifically, the upper positioning structure includes a plurality of first positioning slide rods 265 , each of which is slidably arranged in each first slide cavity 2612 , and each first positioning slide rod 265 has a first piston portion sealed and slidably connected to the first slide cavity 2612 at one end close to the first circular groove 2611 .

[0060] The upper positioning structure can be further limited and fixed. After the annular expansion chamber is pressurized, the first positioning slide bars 265 are pushed outward through the first circular grooves 2611 and the first slide cavities 2612, so that after the first positioning slide bars 265 extend out of the upper annular plate body 261, they abut against the inner wall of the recharging well 40, which can increase the friction between the expansion assembly 26 and the inner wall of the recharging well 40, and then effectively resist the reverse water pressure from the drainage space 41 below, ensuring the stability of the expansion assembly 26. At the same time, after the first positioning slide bars 265 extend out, they can form an interception structure above the rubber sleeve 263, further limit the expansion range of the rubber sleeve 263, and ensure the sealing effect between the rubber sleeve 263 and the inner wall of the recharging well 40.

[0061] In some embodiments, the expansion assembly 26 may be implemented as follows: Figure 2 and Figure 4 See the structure shown. Figure 2 and Figure 4 , the expansion assembly 26 also includes a lower positioning structure.

[0062] Specifically, the upper plate surface of the lower annular plate body 262 is provided with a plurality of second circular grooves 2621, and each second circular groove 2621 is arranged at an annular interval around the axis of the lower annular plate body 262. A plurality of second sliding cavities 2622 are also provided in the lower annular plate body 262, each second sliding cavity 2622 corresponds to each second circular groove 2621 one by one, and each second sliding cavity 2622 is arranged along the radial direction of the lower annular plate body 262, and one end of each second sliding cavity 2622 is connected to the corresponding second circular groove 2621, and the other end passes through the outer edge of the lower annular plate body 262.

[0063] Specifically, the lower positioning structure includes a plurality of second positioning slide rods 266 , each second positioning slide rod 266 is slidably arranged in each second slide cavity 2622 , and each second positioning slide rod 266 has a second piston portion sealed and slidably connected to the second slide cavity 2622 at one end close to the second circular groove 2621 .

[0064] The lower positioning structure can be further limited and fixed, and after the annular expansion chamber is pressurized, the second positioning slide bars 266 are pushed outward through the second circular grooves 2621 and the second slide cavities 2622, so that after the second positioning slide bars 266 extend out of the lower annular plate body 262, they abut against the inner wall of the recharging well 40, which can increase the friction between the expansion assembly 26 and the inner wall of the recharging well 40, and then effectively resist the reverse water pressure from the drainage space 41 below, and ensure the stability of the expansion assembly 26. At the same time, after the second positioning slide bars 266 extend out, they can form an interception structure below the rubber sleeve 263, further limit the expansion range of the rubber sleeve 263, and ensure the sealing effect between the rubber sleeve 263 and the inner wall of the recharging well 40.

[0065] In some embodiments, the expansion assembly 26 may be implemented as follows: Figure 2 and Figure 4 See the structure shown. Figure 2 and Figure 4 The expansion assembly 26 also includes a pressurized self-locking structure 267, which includes an upper cylinder 2671, a lower cylinder 2672, a sliding tube 2673 and a second spring 2674. A plurality of upper cylinders 2671 are provided, each of which is fixedly connected to the lower plate surface of the upper annular plate body 261, and the axis is arranged along the vertical direction, and is connected to each first circular groove 2611 one by one. A first circular hole 2675 is provided on the side wall of each upper cylinder 2671. A plurality of lower cylinders 2672 are provided, each of which is fixedly connected to the upper plate surface of the annular plate body, and the axis is arranged along the vertical direction. Each lower cylinder 2672 is arranged in a one-to-one correspondence with each upper cylinder 2671, and each lower cylinder 2672 is connected to each second circular groove 2621. There are multiple sliding tubes 2673, each sliding tube 2673 is arranged in a one-to-one correspondence with each lower cylinder 2672, and the axis is arranged along the vertical direction. The top end of each sliding tube 2673 passes through the sealing hole set on the lower annular plate 262, and then passes through the corresponding second circular groove 2621, the corresponding cylinder cavity of the lower cylinder 2672 and the corresponding annular expansion cavity in sequence, and then extends into the corresponding upper cylinder 2671. A limiting cap 2677 is provided at the bottom end of the sliding tube 2673, and a limiting ring 2678 that can contact the top end of the corresponding lower cylinder 2672 is provided on the sliding tube 2673. A second circular hole 2676 that can communicate with the corresponding second sliding cavity 2622 is provided on the side wall of the sliding tube 2673. There are multiple second springs 2674, and each second spring 2674 is mounted on each sliding tube 2673. One end of each spring abuts against the lower plate surface of the lower annular plate body 262, and the other end abuts against the corresponding limiting cap 2677.

[0066] Specifically, each sliding tube 2673 has a normal pressure state and a pressurized state. In the normal pressure state, each second spring 2674 bounces each stop ring 2678, so that each sliding tube 2673 moves downward until each stop ring 2678 abuts against the corresponding lower cylinder 2672, so that each sliding tube 2673 is connected with the corresponding second sliding cavity 2622 through its own second circular hole 2676, so that the top end of each sliding tube 2673 is located below each first circular hole 2675. In the pressurized state, each sliding tube 2673 moves upward after receiving the reverse pressure from the drainage space 41, closing the connection between each second circular hole 2676 and the corresponding second sliding cavity 2622, and moving the top end of each sliding tube 2673 to the top of each first circular hole 2675, closing the connection between each first sliding cavity 2612 and the corresponding first circular hole.

[0067] Under normal pressure, taking one of the sliding tubes 2673 as an example, the second spring 2674 will bounce the limit cap 2677, and then pull the sliding tube 2673 downward until the limit ring 2678 contacts the top of the lower cylinder 2672. At this time, the lumen of the sliding tube 2673 is connected to the second sliding cavity 2622 through the second circular hole 2676, and the lumen of the sliding tube 2673 is connected to the upper cylinder 2671, the first circular groove 2611 and the first sliding cavity 2612. When the hydraulic liquid in the annular hydraulic cavity can enter the cylinder cavity of the upper cylinder 2671 through the first circular hole 2675, and can enter the first sliding cavity 2612 and the second sliding cavity 2622 respectively, as the annular hydraulic cavity is pressurized, the first sliding rod and the second sliding rod are respectively pushed outward to abut against the inner wall of the recharging well 40 to form a positioning. At this time, the sealing and blocking effect of the expansion assembly 26 and the inner wall of the recharging well 40 can be guaranteed.

[0068] In the pressurized state, taking one of the sliding tubes 2673 as an example, the water pressure in the drainage space 41 is too high, and the port at the bottom end of the fixed tube 21 is blocked, so that the water pressure acts on the limiting cap 2677, and the sliding tube 2673 is pushed upward by the limiting cap 2677. After the sliding tube 2673 moves upward, the second circular hole 2676 moves up to the lower cylinder 2672, thereby releasing the connection between the second circular hole 2676 and the second sliding cavity 2622, and the position of the second positioning slide rod 266 will be locked. After the sliding tube 2673 moves upward, the top end of the sliding tube 2673 will pass through the first circular hole 2675, thereby blocking the first circular hole 2675. At the same time, because the volume of the sliding tube 2673, the upper cylinder 2671 and the first circular groove 2611 is reduced, the hydraulic liquid will further squeeze the first positioning slide bar 265, causing the first positioning slide bar 265 to continue to slide outward, further increasing the contact force between the first positioning slide bar 265 and the inner wall of the re-injection well 40, or inserting it into the inner wall of the re-injection well 40.

[0069] The self-locking structure 267 can effectively ensure that as the water pressure in the drainage space 41 increases, the expansion assembly 26 is further fixed to ensure the sealing effect.

[0070] It should be noted that annular sealing rings are provided on the inner walls of the upper cylinder 2671 and the lower cylinder 2672 and are sealed and slidably connected to the sliding tube 2673. At the same time, annular sealing rings are also provided in the sealing holes to ensure the sealing effect of the sliding tube 2673. This technology is existing technology and will not be repeated here.

[0071] In some embodiments, the expansion assembly 26 may be implemented as follows: Figure 2 See the structure shown. Figure 2The expansion assembly 26 also includes a plurality of tie rods, each of which is arranged in an annular expansion chamber at an annular interval around the axis of the fixed tube 21, and one end of each tie rod is fixedly connected to the upper annular plate body 261, and the other end is fixedly connected to the lower annular plate body 262.

[0072] Each pull rod can ensure the connection between the upper annular plate 261 and the lower annular plate 262, thereby improving the structural strength. At the same time, in the process of retracting and contracting the rubber sleeve 263, in order to avoid excessive contraction of the rubber sleeve 263, each pull rod can ensure the limit of the contraction process of the rubber sleeve 263, thereby ensuring that after the rubber sleeve 263 stops contracting, each first positioning slide rod 265 and each second positioning slide rod 266 can be retracted, which is convenient for disassembly and assembly.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mobile underground runoff driven submersible pump for a recharging well, characterized in that: include: A pump body having a water inlet and a water outlet located below the water inlet; A sealing mechanism is fixedly connected to the pump body and has a drainage channel connected to the water outlet. The bottom end of the sealing mechanism is provided with a drainage port connected to the drainage channel. The sealing mechanism is used to contact the inner wall of the recharge well after expansion so as to be fixed in the recharge well, and separate the recharge well into a drainage space connected to the underground aquifer and an inlet space located above the drainage space and for the pump body to be placed. The sealing mechanism comprises a fixed pipe, a movable circular plate, a sliding ring, a sliding column, a first spring and an expansion assembly. The fixed pipe is arranged in a vertical direction, and the top end is fixedly connected to the water outlet. A fixed ring plate is coaxially arranged at the bottom end of the fixed pipe. The movable circular plate is arranged below the fixed ring plate and coaxially with the fixed ring plate. The sliding ring The sliding column is located above the fixed ring plate and is slidably sleeved on the fixed tube; there are multiple sliding columns, each of which is arranged in an annular interval around the axis of the fixed tube, the central axis of each sliding column is arranged parallel to the axis of the fixed tube, and the top end of each sliding column is fixedly connected to the sliding ring, and the bottom end passes through the sliding hole on the fixed ring plate and is fixedly connected to the movable circular plate; the first spring is located between the sliding ring and the fixed ring plate, and is sleeved on the fixed tube, and is used to continuously bounce the sliding ring so that the sliding ring has a tendency to keep moving upward; the expansion component is fixedly arranged on the fixed tube, and is located above the fixed ring plate, and is used to contact the inner wall of the reinjection well after expansion to block the reinjection well; wherein the expansion assembly comprises an upper annular plate body, a lower annular plate body, a rubber sleeve, a pressurizing structure, an upper positioning structure and a lower positioning structure; the upper annular plate body is coaxially sleeved on the fixed tube; the lower annular plate body is coaxially sleeved on the fixed tube and is located below the upper annular plate body; the rubber sleeve is annularly arranged around the outer side of the fixed tube, the top end is fixedly connected to the upper annular plate body, and the bottom end is connected to the lower annular plate body, and the rubber sleeve, the upper annular plate body and the lower annular plate body enclose a ring-shaped expansion chamber; the pressurizing structure is communicated with the annular expansion chamber through an injection port arranged on the upper annular plate body; the lower plate surface of the upper annular plate body is provided with a plurality of first circular grooves, and each of the first circular grooves is arranged at an annular interval around the axis of the upper annular plate body; a plurality of first sliding cavities are also provided in the upper annular plate body, each of the first sliding cavities corresponds to each of the first circular grooves one by one, and each of the first sliding cavities is arranged along the radial direction of the upper annular plate body, and one end of each of the first sliding cavities is communicated with the corresponding first circular groove The cam is annularly fixed to the upper and lower surfaces of the first and second sliding cavities, and the cam is connected to the upper and lower surfaces of the first and second sliding cavities by a plurality of threading means.

2. The mobile downhole runoff driven submersible pump for a recharging well as claimed in claim 1, characterized in that: The mobile downhole runoff-driven submersible pump for the recharging well also includes a cable, which is connected to the pump body and is used to lower the combination of the pump body and the sealing mechanism to a position above the underground aquifer corresponding to the recharging well.

3. The mobile downhole runoff driven submersible pump for a recharging well as claimed in claim 1, characterized in that: The bottom surface of the fixed ring plate and the top surface of the movable circular plate are both covered with sealing rubber pads.

4. The mobile downhole runoff driven submersible pump for a recharging well as claimed in claim 1, characterized in that: The expansion assembly further includes a pressurized self-locking structure, and the pressurized self-locking structure includes: There are multiple upper cylinders, each of which is fixedly connected to the lower plate surface of the upper annular plate body, and the axis is arranged along the vertical direction and is connected to each of the first circular grooves one by one; a first circular hole is provided on the side wall of each upper cylinder; There are multiple lower cylinders, each of which is fixedly connected to the upper plate surface of the annular plate body, and the axis is arranged along the vertical direction; each of the lower cylinders is arranged in a one-to-one correspondence with each of the upper cylinders, and each of the lower cylinders is connected to each of the second circular grooves; A plurality of sliding tubes are provided, each of which is arranged in one-to-one correspondence with each of the lower cylinders, and the axes are all arranged along the vertical direction; the top end of each sliding tube passes through the sealing hole provided on the lower annular plate body and then sequentially passes through the corresponding second circular groove, the corresponding cylinder cavity of the lower cylinder and the corresponding annular expansion cavity, and then extends into the corresponding upper cylinder; a limiting cap is provided at the bottom end of the sliding tube, and a limiting ring that can contact the top end of the corresponding lower cylinder is provided on the sliding tube; a second circular hole that can communicate with the corresponding second sliding cavity is provided on the side wall of the sliding tube; A plurality of second springs are provided, each of which is sleeved on each of the sliding tubes, one end of each of the springs abuts against the lower plate surface of the lower annular plate body, and the other end abuts against the corresponding limiting cap; Wherein, each of the sliding tubes has a normal pressure state and a pressurized state; in the normal pressure state, each of the second springs bounces each of the limiting rings to make each of the sliding tubes move downward until each of the limiting rings abuts against the corresponding lower cylinder, so that each of the sliding tubes is connected to the corresponding second sliding cavity through its own second circular hole, so that the top end of each of the sliding tubes is located below each of the first circular holes; in the pressurized state, each of the sliding tubes moves upward after receiving the reverse pressure from the drainage space, closing the connection between each of the second circular holes and the corresponding second sliding cavities, and moving the top end of each sliding tube to above each of the first circular holes, closing the connection between each of the first sliding cavities and the corresponding first circular holes.

5. The mobile downhole runoff driven submersible pump for a recharging well as claimed in claim 1, characterized in that: The expansion assembly also includes a plurality of tie rods, each of which is arranged in the annular expansion chamber at an annular interval around the axis of the fixed tube, and one end of each tie rod is fixedly connected to the upper annular plate body, and the other end is fixedly connected to the lower annular plate body.

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