CN220202728U - Precipitation well plugging structure for high-pressure-bearing water-rich stratum - Google Patents

Abstract

The utility model discloses a dewatering well plugging structure for a high-pressure-bearing water-rich stratum, which is characterized by comprising the following components: the plugging pipe is connected with a dewatering well mouth, the annular sleeve is arranged on a water stop ring on the outer wall of the plugging pipe, the plugging cover is symmetrically arranged on a rotary supporting piece on the inner wall of the plugging pipe, and the two ends of the plugging pipe are rotatably connected with a rotary shaft of the rotary supporting piece. The utility model not only can solve the problems of large dewatering well water inflow of the high-pressure-bearing water-rich stratum and plugging of the dewatering well under the condition of high pressure-bearing water head after the construction of the main structure is completed, but also can prevent and cope with the condition that the construction of the main structure is influenced due to the fact that a large amount of water inflow is generated due to untimely water pumping and drainage in the dewatering well during the construction of the main structure.

Description

Precipitation well plugging structure for high-pressure-bearing water-rich stratum

Technical Field

The utility model belongs to the technical field of plugging construction assistance of precipitation wells, and particularly relates to a precipitation well plugging structure for a high-pressure-bearing water-rich stratum.

Background

Along with the rapid development of economic construction in China, underground engineering is in a stage of high-speed development in China, the underground engineering is further popularized, and in the process of underground engineering construction, groundwater is required to be subjected to precipitation so as to ensure the smooth and safe construction of a main structure; after the construction of the main body structure is completed, a dewatering well is required to be plugged, and in the plugging process of the dewatering well, two conditions exist, namely, no water or small water quantity exists in the dewatering well; and secondly, the water inflow amount in the dewatering well is large, and the dewatering well has pressure bearing property. The former is blocked simply, and the latter is blocked more difficult to solve the problem of water burst.

In the prior art, chinese patent (cn202220607046. X) discloses a construction structure for plugging a precipitation well with strong water pressure, which is formed by inserting a water-absorbing hot-melt pipe in the precipitation well with strong water pressure, backfilling an in-pipe plugging structure in the water-absorbing hot-melt pipe, backfilling an annular plugging structure between the precipitation well and the water-absorbing hot-melt pipe, and setting a top plugging structure at the top of the water-absorbing hot-melt pipe; the bottom of the water-absorbing hot-melting pipe is provided with an open-pore section pipe section. According to the technology, the water-absorbing hot-melting pipe is arranged in the dewatering well, groundwater in the dewatering well is absorbed and discharged, the water burst pressure is reduced, and underground strong-pressure water is isolated outside the annular plugging area, so that the annular plugging area is backfilled and plugged without being influenced by the underground strong-pressure water burst, the stability of a plugging structure in the annular plugging area is ensured, the inner diameter of the dewatering well is reduced, and the plugging difficulty of the dewatering well is reduced and the well plugging success rate is improved. However, this solution has the following drawbacks: under the conditions that the water inflow is very large and the pressure-bearing water head is high, the effect of the water-absorbing hot-melting pipe on reducing the water inflow pressure is poor, the water inflow cannot be fundamentally solved, and the plugging quality of a dewatering well cannot be guaranteed. In addition, the technical scheme can only be constructed after the main structure is constructed and the plugging condition of the dewatering well is met; for the high-pressure-bearing water-rich stratum, the plugging construction structure cannot be constructed and act during the construction dewatering period of the main structure, and the situation that the construction of the main structure is influenced due to the fact that a large amount of water gushes due to untimely water pumping and draining in the dewatering well under unexpected conditions cannot be solved.

Disclosure of Invention

The utility model provides a dewatering well plugging structure for a high-pressure-bearing water-rich stratum, which can solve the problems that after the construction of a main structure is finished, the dewatering well of the high-pressure-bearing water-rich stratum is large in water inflow and the dewatering well under the condition of high pressure-bearing water head is plugged, and can prevent and cope with the condition that a large amount of water inflow is caused due to untimely water pumping and draining in the dewatering well during the construction of the main structure in the dewatering period of the main structure construction so as to influence the construction of the main structure.

The utility model is realized by the following technical scheme.

Precipitation well plugging structure for high-pressure-bearing water-rich stratum, which is characterized by comprising: the plugging device comprises a plugging pipe connected with a wellhead of a dewatering well, a water stop ring sleeved on the outer wall of the plugging pipe, a plugging plate, rotary supporting pieces symmetrically arranged on the inner wall of the plugging pipe, a rotary shaft with two ends rotationally connected with the rotary supporting pieces, and a plugging ring;

the plugging ring comprises a long-arc-section water stop ring and a short-arc-section water stop ring which are horizontally arranged along the inner wall of the plugging pipe; the two ends of the arc section of the long arc section plugging ring are connected with one side of the rotary support piece, the two ends of the arc section of the short arc section water stop ring are connected with the other side of the rotary support piece, and the long arc section water stop ring is positioned above the short arc section water stop ring;

the plugging plate comprises a lower plugging plate and an upper plugging plate which are arranged in parallel; the lower plugging plate is connected with one side of the rotating shaft, and the upper plugging plate is connected with the other side of the rotating shaft, so that the lower plugging plate and the upper plugging plate can freely rotate around the axis of the rotating shaft through the rotating support piece; when the lower plugging plate and the upper plugging plate rotate to the horizontal position, the upper surface edge of the lower plugging plate is abutted with the lower surface of the long-arc-section water stop ring, and the lower surface edge of the upper plugging plate is abutted with the upper surface of the short-arc-section water stop ring, so that the wellhead of the dewatering well is plugged by the plugging plate and the plugging ring.

As a specific technical scheme, one end of the lower surface of the lower plugging plate, which is far away from the rotating shaft, is provided with a floating block, and the floating block is used for providing buoyancy to form a rotating moment so that the lower plugging plate rotates clockwise around the rotating shaft.

As a specific technical scheme, when the lower plugging plate and the upper plugging plate rotate to the horizontal position, the upper surface edge of the lower plugging plate is abutted with the lower surface part of the long arc section plugging ring.

As a specific technical scheme, the dewatering well plugging structure further comprises a first drainage pipe, the first drainage pipe penetrates through the long arc section water stop ring up and down, a valve is arranged at the upper end of the first drainage pipe, and the lower end of the second drainage pipe extends downwards from the lower surface of the long arc section water stop ring to 10-20 cm.

As a specific technical scheme, the dewatering well plugging structure further comprises a second drainage pipe, wherein the second drainage pipe vertically penetrates through the short-arc-section water stop ring, a valve is arranged at the upper end of the second drainage pipe, and the lower end of the second drainage pipe extends downwards from the lower surface of the short-arc-section water stop ringdNot less than l, whereinlIs the maximum vertical distance of the edge of the lower closure plate from the axis of rotation.

As a specific technical scheme, when the lower plugging plate rotates downwards, the maximum included angle between the lower plugging plate and the horizontal plane is 75 degrees.

As a specific technical scheme, the lower surface of the long-arc-section water stop ring and the upper surface of the short-arc-section water stop ring are provided with sealing rubber gaskets in a sticking manner.

As a specific technical scheme, the dewatering well plugging structure further comprises a plugging plate control rod, and one end of the plugging plate control rod is hinged with one end, far away from the rotating shaft, of the upper surface of the lower plugging plate.

As a specific technical scheme, the plugging tube is processed by steel; the water stop ring and the plugging plate are made of steel plates.

As a specific technical scheme, the height of the plugging pipe is 80-120 cm, and the outer diameter of the plugging pipe is the same as the inner diameter of the wellhead of the dewatering well.

The utility model has the following beneficial effects:

1) According to the utility model, the plugging structure is arranged in the dewatering well, the plugging steel plate is tightly attached to the inner water-stop steel ring by utilizing the biasing force generated by the action of the pressure-bearing underground water on the plugging structure, and the sealing rubber gasket is arranged between the plugging steel plate and the inner water-stop steel ring, so that the sealing effect is enhanced, the underground water is blocked, and a good working surface is provided for the subsequent plugging work of the dewatering well; the utility model has simple and effective principle, simple and convenient operation and low cost, and can well solve the problem of plugging the precipitation well of the high-pressure-bearing water-rich stratum.

2) According to the utility model, the floating block is arranged at one end of the lower plugging plate, so that the lower plugging plate can rotate clockwise around the rotating shaft by utilizing the rotating moment formed by the buoyancy of the floating block, and the plugging structure of the dewatering well is automatically closed, so that the condition that a large amount of water burst is generated and the construction of the main structure is influenced due to untimely water pumping and draining in the dewatering well during the construction of the main structure can be prevented and treated; meanwhile, the first drainage pipe and the second drainage pipe are arranged on the plugging ring, and the first drainage pipe can be convenient for installing the water pump to drain water, so that the drainage pipe of the water pump cannot influence the rotation of the lower plugging plate, and the floating block can be ensured to play a role; the second drainage pipe can timely drain the water burst of the dewatering well, so that the floating block cannot be contacted with the water burst to generate buoyancy, the lower plugging plate can be guaranteed to smoothly rotate downwards, the plugging structure of the dewatering well is in an open state, and the water pump is taken out for overhauling or replacement.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model (dewatering well plugging structure in an open state);

FIG. 2 is a schematic diagram of the structure of the present utility model (the dewatering well plugging structure is in a closed state);

FIG. 3 is a schematic top view of the present utility model (the dewatering well plugging structure is in a closed position, and the plugging panel control rods are not shown);

FIG. 4 is a schematic top view of the present utility model;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 6 is a schematic diagram of the drainage of a dewatering well during construction of a main structure using the present utility model;

FIG. 7 is a schematic illustration of the plugging of a dewatering well using the present utility model after construction of a main structure is completed;

FIG. 8 is a schematic view of pumping and draining water in a dewatering well by using a second pumping and draining pipe;

the meaning of each mark in the above figures is: the water-reducing well 1, a plugging pipe 2, a water stop ring 3, a plugging ring 4, a long arc section water stop ring 401, a short arc section water stop ring 402, a sealing rubber pad 403, a rotary support 5, a plugging plate 6, a lower plugging plate 601, an upper plugging plate 602, a floating block 603, a rotary shaft 7, a first water pumping and draining pipe 8, a valve 9, a second water pumping and draining pipe 10, a plugging plate control rod 11, a water pump 12 and micro-expansion concrete 13.

Description of the embodiments

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Examples

Referring to fig. 1 to 5, a dewatering well plugging structure for a high-pressure-bearing water-rich stratum includes: the plugging device comprises a plugging pipe 2 connected with a wellhead of a dewatering well 1, a water stop ring 3 sleeved on the outer wall of the plugging pipe 2, plugging plates 6, rotary supporting pieces 5 symmetrically arranged on the inner wall of the plugging pipe 2, a rotary shaft 7 with two ends rotatably connected with the rotary supporting pieces 5 and a plugging ring 4, wherein the plugging pipe is sleeved on the water stop ring 3; preferably, the plugging tube 2 is a circular tube, the plugging ring 4 is an arc ring, the outer diameter of the plugging tube 2 is 250-500 mm, the wall thickness is 2-5 mm, the width of the plugging ring 4 is 50-80 mm, and the thickness is 2-5 mm;

the plugging ring 4 comprises a long arc section plugging ring 401 and a short arc section plugging ring 402 which are horizontally arranged along the inner wall of the plugging tube 2; the two ends of the arc section of the long arc section plugging ring 401 are connected with one side of the rotary support 5, the two ends of the arc section of the short arc section plugging ring 402 are connected with the other side of the rotary support 5, and the long arc section plugging ring 401 is positioned above the short arc section plugging ring 402, namely the long arc section plugging ring 401 and the short arc section plugging ring 402 are connected end to end through the rotary support 5; preferably, the arc length of the long arc section plugging ring 401 is 2-4 times of the arc length of the short arc section plugging ring 402;

the plugging plate 6 comprises a lower plugging plate 601 and an upper plugging plate 602 which are arranged in parallel; the lower blocking plate 601 is connected with one side of the rotating shaft 7, and the upper blocking plate 602 is connected with the other side of the rotating shaft 7, so that the lower blocking plate 601 and the upper blocking plate 602 can freely rotate around the axis of the rotating shaft 7 through the rotating support 5; when the lower plugging plate 601 and the upper plugging plate 602 rotate to the horizontal position, the edge of the upper surface of the lower plugging plate 601 is abutted with the lower surface of the long arc section plugging ring 401, and the edge of the lower surface of the upper plugging plate 602 is abutted with the upper surface of the short arc section plugging ring 402, so that the wellhead of the dewatering well is plugged by the plugging plate 6 and the plugging ring 4; preferably, the plugging plate 6 may be formed by cutting a circular steel plate into a lower plugging plate 601 and an upper plugging plate 602, and then welding the lower plugging plate 601 and the upper plugging plate 602 on both sides of the rotating shaft 7;

when the dewatering well plugging structure is used, the plugging pipe 2 can be plugged into the wellhead of the dewatering well 1, so that the water stop ring 3 is covered on the wellhead of the dewatering well 1; normally, the dewatering well 1 is a steel pipe, and the seam between the water stop ring 3 and the dewatering well 1 is welded, and the seam should be fully welded and cannot be missed; referring to fig. 6, during the construction of the main structure for precipitation, the plugging plate 601 may be depressed to open the precipitation well plugging structure, and then the water pump 12 is placed into the precipitation well through the plugging pipe 2 for pumping and draining precipitation; referring to fig. 7, when the construction of the main structure is completed and the plugging condition of the dewatering well is provided, the water pump can be taken out, and then the plugging plate 601 is pulled up to enable the plugging structure of the dewatering well to be in a closed state; at this time, along with the continuous generation of water gushing in the dewatering well, when the water level of the dewatering well reaches the position of the lower surface of the lower blocking plate 601, the pressure of the bearing water in the dewatering well can jack the lower blocking plate 601 upwards, so that the blocking plate 6 and the blocking ring 4 can be tightly attached to isolate the underground water; then, micro-expansion concrete 13 can be poured into the plugging tube 2 above the plugging plate 6, wherein the concrete index is higher than that of the main structure plate concrete by one index.

When the upper plugging plate 602 rotates downward, the edge of the upper plugging plate 602 may touch the inner wall of the plugging tube 2, so that the upper plugging plate 602 cannot rotate downward (anticlockwise), further, in a preferred embodiment, referring to fig. 2 and 3, when the lower plugging plate 601 rotates to a horizontal position with the upper plugging plate 602, the edge of the upper surface of the lower plugging plate 601 abuts against the lower surface of the long arc segment plugging ring 4, so that a certain avoiding space is reserved between the edge of the lower plugging plate 601 and the inner wall of the plugging tube 2, so as to increase the downward rotation angle of the lower plugging plate 601, and further, the dewatering well plugging structure is opened to facilitate the installation and removal of the water pump; preferably, the width of the plugging ring 4 is 50-80 mm, and the contact width between the edge of the upper surface of the lower plugging plate 601 and the lower surface of the plugging ring 4 with the long arc section is 20-30 mm (along the width direction of the plugging ring 4).

Further, in a preferred embodiment, a floating block 603 is fixedly disposed at an end of the lower surface of the lower plugging plate 601 away from the rotation shaft 7, and referring to fig. 1 and 7, the floating block 603 is configured to provide buoyancy to form a rotation moment to rotate the lower plugging plate 601 clockwise around the rotation shaft 7; in particular, the floating block 603 may employ a foam block or an internal vacuum plastic box to provide sufficient buoyancy; the size of the floating block 603 can be reasonably confirmed and selected according to the construction condition of the site; during the construction of the main structure, if the water pump in the dewatering well works abnormally, or the drainage channel is not smooth, water burst in the dewatering well cannot be discharged in time, and then water burst enters a construction site to affect the construction of the main structure, based on the arrangement of the structure, even if the water burst cannot be discharged in time, when the water burst water level reaches the position of the floating block 603, the floating block 603 can provide buoyancy to form a rotating moment to enable the lower blocking plate 601 to rotate clockwise around the rotating shaft 7, so that the blocking structure of the dewatering well can be automatically in a closed state (namely, the blocking plate 6 is tightly attached to the blocking ring 4), and thus water burst cannot be greatly burst out to affect the construction of the main structure.

In order to prevent the water pumping pipe of the water pump from affecting the floating block 603 to drive the upper plugging plate 602 to rotate clockwise, further, in a preferred embodiment, referring to fig. 1 and 7, the plugging structure for a dewatering well further includes a first water pumping pipe 8, wherein the first water pumping pipe 8 vertically penetrates through the long arc segment plugging ring 401 and is required to avoid the contact position between the long arc segment plugging ring 401 and the upper plugging plate 602; the upper end of the first drainage pipe 8 is provided with a valve 9, and the lower end of the first drainage pipe 8 extends downwards from the lower surface of the long arc section plugging ring 401 by 10-20 cm; during precipitation, the upper blocking plate 602 can be rotated downwards to enable the precipitation well blocking structure to be in an open state, then the water pump is installed in the precipitation well, then the water outlet pipe of the water pump is connected with the lower end of the first water pumping and draining pipe 8, and then the water outlet end of the first water pumping and draining pipe 8 is connected with a water draining pipe.

Further, in a preferred embodiment, referring to fig. 1 and 8, the plugging structure for a dewatering well of the present utility model further includes a second drainage pipe 10, wherein the second drainage pipe 10 is disposed vertically through the short arc plugging ring 402, andthe upper end of the second water pumping and draining pipe 10 is provided with a valve 9, and the lower end of the second water pumping and draining pipe 10 extends downwards from the lower surface of the short arc section plugging ring 402 by a distanced≥lWhereinlThe maximum vertical distance between the edge of the lower plugging plate 601 and the rotating shaft 7 (i.e. the vertical distance between the leftmost edge of the lower plugging plate 601 and the axis of the rotating shaft 7 when the lower plugging plate 601 is in the horizontal position and is in contact with the lower surface of the long arc segment plugging ring 401); when the water in the dewatering well cannot be discharged in time, although the floating block 603 can provide buoyancy to form a rotation moment to enable the lower blocking plate 601 to rotate clockwise around the rotation shaft 7, so that the dewatering well blocking structure is automatically in a closed state (namely, the blocking plate 6 is tightly attached to the blocking ring 4), the lower blocking plate 601 needs to be rotated downwards at the moment to enable the dewatering well blocking structure to be in an open state so as to take out the water pump for maintenance or replacement, and the lower blocking plate 601 is difficult to rotate downwards due to the pressure of the pressurized water and the buoyancy of the floating block 603; since the float 603 is also at the lowest position when the lower closure plate 601 is rotated down to the lowest position, the distance of the float 603 from the short arc segment closure ring 402 is approximately equal tol，And the lower end of the second water pumping and draining pipe 10 extends downwards from the lower surface of the short arc section plugging ring 402d≥l，Therefore, after the water burst in the dewatering well is pumped and discharged through the second pumping and discharging pipe 10, the floating block 603 can not contact with the water burst to generate buoyancy, so that the lower plugging plate 601 can be ensured to smoothly rotate downwards.

Further, in a preferred embodiment, referring to fig. 1 and 8, when the lower plugging plate 601 rotates downward, the maximum angle between the lower plugging plate 601 and the horizontal plane is 75 °, so that the floating block 603 can smoothly drive the upper plugging plate 602 to rotate clockwise.

In order to make the plugging plate 6 and the plugging ring 4 tightly fit to have a better sealing effect, further, in a preferred embodiment, referring to fig. 1 and 2, a sealing rubber pad 403 is attached to the lower surface of the long arc section plugging ring 401 and the upper surface of the short arc section plugging ring 402.

In order to facilitate the control of the rotation of the lower closure plate 601, further, in a preferred embodiment, referring to fig. 1 and 2, the dewatering well closure structure of the present utility model further comprises a closure plate control rod 11, one end of the closure plate control rod 11 being hinged to the end of the upper surface of the lower closure plate 601 remote from the rotation axis 7.

Further, in a preferred embodiment, the occlusion tube 2 is fabricated from steel; the water stop ring 3 and the plugging plate 6 are made of steel plates.

Further, in a preferred embodiment, the height of the plugging tube 2 is 80-120 cm, and the outer diameter of the plugging tube 2 is the same as the inner diameter of the precipitation wellhead.

Claims (10)

1. Precipitation well plugging structure for high-pressure-bearing water-rich stratum, which is characterized by comprising: the plugging device comprises a plugging pipe (2) connected with a wellhead of a dewatering well (1), a water stop ring (3) sleeved on the outer wall of the plugging pipe (2), plugging plates (6), rotary support pieces (5) symmetrically arranged on the inner wall of the plugging pipe (2), rotary shafts (7) with two ends rotationally connected with the rotary support pieces (5), and plugging rings (4);

the plugging ring (4) comprises a long arc section plugging ring (401) and a short arc section plugging ring (402) which are horizontally arranged along the inner wall of the plugging tube (2); the two ends of the arc section of the long arc section plugging ring (401) are connected with one side of the rotary support (5), the two ends of the arc section of the short arc section plugging ring (402) are connected with the other side of the rotary support (5), and the long arc section plugging ring (401) is positioned above the short arc section plugging ring (402);

the plugging plate (6) comprises a lower plugging plate (601) and an upper plugging plate (602) which are arranged in parallel; the lower plugging plate (601) is connected with one side of the rotating shaft (7), and the upper plugging plate (602) is connected with the other side of the rotating shaft (7), so that the lower plugging plate (601) and the upper plugging plate (602) can freely rotate around the axis of the rotating shaft (7) through the rotary supporting piece (5); when the lower plugging plate (601) and the upper plugging plate (602) rotate to a horizontal position, the upper surface edge of the lower plugging plate (601) is in butt joint with the lower surface of the long-arc-section plugging ring (401), and the lower surface edge of the upper plugging plate (602) is in butt joint with the upper surface of the short-arc-section plugging ring (402), so that the wellhead of the dewatering well is plugged by the plugging plate (6) and the plugging ring (4).

2. A dewatering well plugging structure for highly pressurized water rich formations according to claim 1, wherein the lower surface of said lower plugging plate (601) is provided with a float (603) at an end remote from the rotation axis (7), said float (603) being adapted to provide a buoyancy forming rotation moment for clockwise rotation of said lower plugging plate (601) about the rotation axis (7).

3. A dewatering well plugging structure for high pressure water-rich formations according to claim 2, wherein when the lower (601) and upper (602) plugging plates are rotated to a horizontal position, the upper surface edge of the lower plugging plate (601) abuts against the lower surface portion of the long arc segment plugging ring (401).

4. A dewatering well plugging structure for a high-pressure-bearing water-rich stratum as claimed in claim 3, further comprising a first drainage pipe (8), wherein the first drainage pipe (8) is arranged to vertically penetrate through the long arc section plugging ring (401), a valve (9) is arranged at the upper end of the first drainage pipe (8), and the lower end of the first drainage pipe (8) extends downwards from the lower surface of the long arc section plugging ring (401) to 10-20 cm.

5. The dewatering well plugging structure for high-pressure-bearing water-rich stratum as claimed in claim 4, further comprising a second drainage pipe (10), wherein the second drainage pipe (10) is arranged to vertically penetrate through the short arc section plugging ring (402), a valve (9) is arranged at the upper end of the second drainage pipe (10), and the lower end of the second drainage pipe (10) extends downwards from the lower surface of the short arc section plugging ring (402)Distance of extensiond≥lWhereinlIs the maximum vertical distance of the edge of the lower blocking plate (601) from the rotation axis (7).

6. A dewatering well plugging structure for highly pressurized water rich formations according to claim 4, wherein the maximum angle of said lower plugging plate (601) to the horizontal is 75 ° when said lower plugging plate (601) is rotated downwards.

7. The dewatering well plugging structure for high-pressure-bearing water-rich formations according to claim 1, wherein a sealing rubber pad (403) is attached to the lower surface of the long arc section plugging ring (401) and the upper surface of the short arc section plugging ring (402).

8. A dewatering well plugging structure for high pressure water-rich formations according to claim 1, further comprising a plugging plate control rod (11), one end of the plugging plate control rod (11) being hinged to an end of the upper surface of the lower plugging plate (601) remote from the rotation axis (7).

9. The dewatering well plugging structure for high-pressure-bearing water-rich formations according to claim 1, wherein the plugging tube (2) is processed from steel; the plugging ring (4) and the plugging plate (6) are made of steel plates.

10. A dewatering well plugging structure for high pressure water-rich formations according to any of claims 1-9, wherein the height of the plugging tube (2) is 80-120 cm, and the outer diameter of the plugging tube (2) is the same as the inner diameter of the dewatering well wellhead.