A well shut-in device for a precipitation well

Abstract

This utility model provides a well sealing device for dewatering wells, including a dewatering well pipe and a pull plate device. A positioning component is installed on the inner wall of the dewatering well pipe. A guide hole for the pull plate device is opened in the center of the positioning component, and a guide slope is formed on the inner edge of the positioning component, extending outwards and downwards. The pull plate device is positioned below the positioning component and includes a steel sealing plate, a guide sleeve A, and a rotating component. The guide sleeve A is ellipsoidal in shape, and its bottom surface is fixedly connected to the upper surface of the steel sealing plate. The curved surface of the guide sleeve A fits against the guide slope. A through hole is provided in the middle of the guide sleeve A, forming an installation cavity with the steel sealing plate. The rotating component is installed in the installation cavity and can drive the pull plate device to rotate vertically. This utility model, through the fit between the guide sleeve and the guide slope and the rotating component, can accurately complete well sealing, simplifying the operation steps and adapting to different dewatering well conditions.

Description

Technical Field

[0001] This utility model relates to the technical field of dewatering well sealing devices, specifically a dewatering well sealing device. Background Technology

[0002] In the field of well sealing construction for dewatering wells, the traditional backfilling method is currently the mainstream solution, but it has significant shortcomings and cannot meet the diverse and efficient construction needs. The backfilling method controls the groundwater level using a pump, simultaneously filling the bottom of the well with coarse sand and gravel to slow the groundwater inflow, then pouring in concrete (or dry-mixed cement and gravel) to further impede the inflow, and finally relying on the welding of the upper sealing plate to achieve well sealing. This process overemphasizes the welding quality of the upper sealing plate, neglecting the quality of the concrete below. Furthermore, it is affected by fluctuations in the groundwater inflow rate, the limited operating space inside the well, differences in construction coordination, and the gaps in pump pipe removal, often resulting in insufficient concrete thickness and substandard compaction, easily forming leakage channels, leading to high maintenance costs later on. Additionally, workers must operate within the narrow well, posing safety risks, and the construction efficiency is difficult to adapt to projects with tight schedules.

[0003] While the pre-sealing device well sealing process improves upon some of the shortcomings of the backfilling method, its limitations remain significant. It has strict limitations on the material of the embedded casing, only compatible with steel casings, and cannot be used in non-steel casing scenarios such as concrete casings or composite material casings, thus limiting its applicability. Furthermore, it is only suitable for specific scenarios where "the embedded steel casing and the base plate form an integral whole" and "waterproofing is required." If the casing and base plate are not integrally formed, or for simple dewatering wells with low waterproofing requirements, it will significantly increase construction costs. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a well sealing device for dewatering wells. By fitting the guide sleeve with the guide slope of the hollow steel plate and cooperating with the rotating component, the well can be sealed precisely, simplifying the operation steps and adapting to different dewatering well working conditions.

[0005] To achieve its technical objectives, this utility model adopts the following technical solution:

[0006] A well sealing device for dewatering wells includes a dewatering well pipe and a pull plate device. A positioning component is installed on the inner wall of the dewatering well pipe. A guide hole is formed in the center of the positioning component for the pull plate device to pass through. The inner edge of the positioning component slopes outwards and downwards to form a guide slope. The pull plate device is integrally disposed below the positioning component. The pull plate device includes a steel sealing plate, a guide sleeve A, and a rotating component. The guide sleeve A is ellipsoidally shaped, with its bottom surface fixedly connected to the upper surface of the steel sealing plate, and its curved surface fitting the guide slope. A through hole is provided in the middle of the guide sleeve A, forming an installation cavity with the upper surface of the steel sealing plate. The rotating component is installed within the installation cavity and is capable of driving the pull plate device to rotate vertically.

[0007] Preferably, the rotating assembly includes two L-shaped fixing brackets, bolts, reinforcing bars, wire ropes, elastic steel sheets, and double-hole steel sheets. The two L-shaped fixing brackets are symmetrically arranged in the center of the steel sealing plate, and one end of each L-shaped fixing bracket is horizontal and fixedly connected to the upper surface of the steel sealing plate, while the other end is vertical and has a coaxial through hole.

[0008] More preferably, the bolt passes through two coaxial through holes; the reinforcing bar passes through the double-hole steel sheet and is fixedly connected to the double-hole steel sheet; the reinforcing bar is vertical as a whole and has a steel ring at its lower end; the steel ring is movably sleeved on the bolt.

[0009] More preferably, the wire rope movably passes through the double-hole steel sheet and the lower end of the wire rope is fixedly connected to the steel sealing plate; one end of the elastic steel sheet is fixedly connected to the steel sealing plate and the other end is fixedly connected to the double-hole steel sheet.

[0010] More preferably, the lower end of the wire rope is fixedly connected to the steel sealing plate by a fixing block, the upper surface of the steel sealing plate is provided with the fixing block, and the lower end of the wire rope is fixedly connected to the fixing block.

[0011] Preferably, the positioning component includes a hollow steel plate and a guide sleeve B. The hollow steel plate and the guide sleeve B are fixedly connected by a positioning pin B. The positioning pin B is fixedly disposed on the upper wall of the hollow steel plate and the upper end of the positioning pin B is inserted into the guide sleeve B.

[0012] More preferably, both the guide sleeve B and the hollow steel plate have guide holes in their middle parts, the inner edge of the guide sleeve B forms a positioning slope that slopes outward and upward, and the inner edge of the hollow steel plate forms a guide slope that fits with the guide sleeve A.

[0013] More preferably, the lower wall of the guide hole, the steel sealing plate, and the guide sleeve A is elliptical.

[0014] Preferably, the upper surface of the steel sealing plate is provided with a positioning pin A, and the steel sealing plate is fixedly connected to the guide sleeve A through the positioning pin A.

[0015] More preferably, the edge of the guide sleeve A is fitted with an annular sealing ring, and the upper surface of the annular sealing ring is provided with a groove, which is used to reduce the impact of fine sand and gravel on the fit between the guide sleeve A and the guide slope.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention has many advantages in the construction of sealing wells for dewatering, and can be applied to dewatering pipe wells of different materials, effectively expanding the applicable scenarios of the sealing process and reducing the impact of scenario limitations on construction costs and efficiency.

[0018] This invention provides reliable protection through layered pouring and a special fixing structure: after the first layer of concrete is vibrated and compacted and solidified, the steel sealing plate is fixed by the straight threaded steel bars on the steel sealing plate. At the same time, the steel sealing plate and the concrete clamp the hollow steel plate together, forming a stable bottom seal in the dewatering well. This lays the foundation for the compacted pouring of the second layer of concrete and subsequent sealing plate operations, ensuring the quality of concrete pouring, reducing the amount of steel bars used, and reducing the overall weight of the device while ensuring structural strength, thus reducing the difficulty of construction and installation.

[0019] This invention can improve construction efficiency and facilitate quality observation: the specially designed hollow steel plate has a large hollow area, which can be adapted to larger diameter pump pipes before sealing the plate, or multiple pump pipes can be set at the same time to speed up the concrete pouring speed; the process interval formed by layered construction makes it convenient for construction personnel to observe the compactness of the concrete pouring and the sealing status of the structure in the early stage, and to deal with potential problems in a timely manner, so as to ensure the quality of subsequent construction and avoid leakage or structural hazards in the later stage. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the pull plate device of this utility model;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 for Figure 1 Longitudinal section view;

[0023] Figure 4 for Figure 3 Exploded view;

[0024] Figure 5 This is a schematic diagram of the installation of the positioning component in this utility model;

[0025] Figure 6This is a cross-sectional view showing the final installation effect of this utility model;

[0026] Figure 7 Enlarged view showing the installation details of the pull plate device and positioning components;

[0027] Figure 8 This is a cross-sectional view of the positioning component in this utility model.

[0028] Figure label:

[0029] 1. Steel sealing plate, 2. L-shaped fixing bracket, 3. Elastic steel sheet, 4. Double-hole steel sheet, 5. Fixing block, 6. Bolt, 7. Guide sleeve A, 8. Annular sealing ring, 9. Steel wire rope, 10. Reinforcing bar, 11. Steel ring, 12. Positioning pin A, 13. Hollow steel plate, 14. Positioning pin B, 15. Guide sleeve B, 16. Dewatering well pipe, 17. Positioning slope, 18. Guide slope, 19. Guide hole. Detailed Implementation

[0030] In the description of this utility model, it should be noted that the terms "upper / lower", "front / rear", "inner / outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the components of a compatible model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, unless otherwise specified, all components used in this application are commercially available components, and the connection between different components can be achieved through conventional technical means.

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] A well sealing device for dewatering wells, such as Figures 1-8 As shown, it includes a dewatering well pipe 16 and a pull plate device. The inner wall of the dewatering well pipe 16 is equipped with a positioning component, such as... Figure 8 As shown, the positioning component has a guide hole 19 in the center for the pull plate device to pass through, and the inner edge of the positioning component forms a guide slope 18 that slopes outward and downward.

[0034] The pulling plate device is integrally positioned below the positioning assembly. The pulling plate device includes a steel sealing plate 1, a guide sleeve A7, and a rotating assembly. The guide sleeve A7 is ellipsoidal in shape, and its bottom surface is fixedly connected to the upper surface of the steel sealing plate 1. The curved surface of the guide sleeve A7 fits against the guide slope 18. Figure 1 and Figure 2 As shown, a through hole is provided in the middle of the guide sleeve A 7, and the through hole and the upper surface of the steel sealing plate 1 form an installation cavity; the rotating component is installed in the installation cavity, and the rotating component can drive the pulling plate device to rotate vertically.

[0035] Understandably, during installation, the pull plate device can rotate vertically under the drive of the rotating component. After rotation, the pull plate device passes through the guide hole 19. When the pull plate device reaches the designated position, it rotates back to the horizontal position, and the guide sleeve A7 and the guide slope 18 inside the dewatering well pipe 16 fit together, thereby forming a temporary seal.

[0036] As a preferred option, such as Figure 2 As shown, the rotating assembly includes two L-shaped fixing brackets 2, bolts 6, reinforcing bars 10, steel wire ropes 9, elastic steel sheets 3, and double-hole steel sheets 4. The two L-shaped fixing brackets 2 are symmetrically arranged in the center of the steel sealing plate 1, and one end of the two L-shaped fixing brackets 2 is horizontal and fixedly connected to the upper surface of the steel sealing plate 1, while the other end is vertical and has coaxial through holes; the bolts 6 pass through the two coaxial through holes.

[0037] The reinforcing bar 10 passes through the double-hole steel plate 4 and is fixedly connected to the double-hole steel plate 4. The reinforcing bar 10 is vertical and has a steel ring 11 at its lower end. The steel ring 11 is movably sleeved on the bolt 6. The wire rope 9 movably passes through the double-hole steel plate 4 and its lower end is fixedly connected to the steel sealing plate 1. One end of the elastic steel plate 3 is fixedly connected to the steel sealing plate 1 and the other end is fixedly connected to the double-hole steel plate 4.

[0038] It should be noted that, as Figure 2 As shown, the elastic steel sheet 3 and the wire rope 9 are located on both sides of the reinforcing bar 10 to prevent the pull plate device from deviating during rotation and reset.

[0039] More preferably, the lower end of the wire rope 9 is fixedly connected to the steel sealing plate 1 by the fixing block 5, and the upper surface of the steel sealing plate 1 is provided with the fixing block 5, and the lower end of the wire rope 9 is fixedly connected to the fixing block 5.

[0040] Understandably, the double-hole steel plate 4 has two through holes. The reinforcing bar 10 passes through one of the through holes and is welded to the double-hole steel plate 4, while the lower end of the wire rope 9 passes through the other through hole and is finally welded to the fixing block 5 on the surface of the steel sealing plate 1. The double-hole steel plate 4 is only fixed to the reinforcing bar 10. By fixing the direction of the reinforcing bar 10 and pulling the wire rope 9 at the same time, the entire pulling plate device rotates around the bolt 6 and gradually approaches the vertical state.

[0041] As a preferred option, such as Figure 7 and Figure 8 As shown, the positioning component includes a hollow steel plate 13 and a guide sleeve B 15. The hollow steel plate 13 and the guide sleeve B 15 are fixedly connected by a positioning pin B 14. The positioning pin B 14 is fixedly disposed on the upper wall of the hollow steel plate 13 and the upper end of the positioning pin B 14 is inserted into the inside of the guide sleeve B 15. Both the guide sleeve B 15 and the hollow steel plate 13 have guide holes 19 in the middle for the pull plate device to pass through. The inner edge of the guide sleeve B 15 slopes outward and upward to form a positioning slope 17, and the inner edge of the hollow steel plate 13 slopes outward and downward to form a guide slope 18 that fits with the guide sleeve A 7.

[0042] It should be noted that the function of the positioning slope 17 is to provide guidance for the plate pulling device, so that the plate pulling device can be lowered more smoothly through the guide hole 19 to the bottom of the hollow steel plate 13 (if the upper surface of the guide sleeve B 15 is perpendicular to the dewatering well pipe 16, the plate pulling device may touch the edge of the guide sleeve B 15 and be blocked during the lowering process).

[0043] As a preferred embodiment, the lower walls of the guide hole 19, the steel sealing plate 1, and the guide sleeve A 7 are elliptical.

[0044] It should be noted that in this embodiment, the guide sleeve A7 is ellipsoidal, while the steel sealing plate 1 and the guide hole 19 are elliptical. This design utilizes the major and minor axes of the ellipse, allowing the plate pulling device to pass through the guide hole 19 after rotation. In actual production, the steel sealing plate 1 and the guide hole 19 can also be set as rhomboid, and the guide sleeve A7 can be changed accordingly, as long as the requirements for the plate pulling device to pass through and the final sealing requirements are met.

[0045] Preferably, the upper surface of the steel sealing plate 1 is provided with a positioning pin A 12, and the steel sealing plate 1 is fixedly connected to the guide sleeve A 7 through the positioning pin A 12, with the upper end of the positioning pin A 12 inserted into the guide sleeve A 7.

[0046] As a better option, such as Figure 7 As shown, an annular sealing ring 8 is fitted around the edge of the guide sleeve A 7. A groove is provided on the upper surface of the annular sealing ring 8. The groove is used to reduce the impact of fine sand and gravel on the fit between the guide sleeve A 7 and the guide slope 18.

[0047] The operation method (overall process) of this utility model:

[0048] a. When manufacturing the dewatering well pipe 16, a specially made hollow steel plate 13 is installed with the dewatering well pipe 16 to form an integral whole. The position of the hollow steel plate 13 in the dewatering well pipe 16 is determined according to the bottom elevation of the concrete when sealing the well. A guide sleeve B 15 is installed on the upper part of the hollow steel plate 13. A thin layer of anti-rust oil is applied to the surface of the guide slope 18 at the lower part of the hollow steel plate 13 and a plastic sheet is attached to ensure that the contact surface is clean and flat to prevent rust or contamination. The plastic sheet is removed and cleaned before the pull plate device is released.

[0049] b. Inspect and clean the relevant devices when the well is sealed; insert the pump pipe of the water pump into the dewatering well pipe 16, insert it to near the bottom position to start pumping, and control the final water level and the vertical distance between the hollow steel plate 13 and the water level to be no less than half a meter; use a long pole to hook out the plastic sheet under the special hollow steel plate 13, and simply clean the bottom of the hollow steel plate 13.

[0050] c. Control the direction of the reinforcing bar 10, tighten the wire rope 9 to make the pulling plate device rotate around the bolt 6 to a vertical or near-vertical state, and then lower the pulling plate device under the hollow steel plate 13 through the reinforcing bar 10. Then pull out the pump pipe to complete the pumping work.

[0051] d. When the pump pipe is pulled out of the hollow steel plate 13, the steel wire rope 9 is released. Under the action of the elastic steel plate 3, the pull plate device rotates and resets to the horizontal position. The rotating steel bar 10 adjusts the angle of the pull plate device so that the guide sleeve A 7 and the guide slope 18 are initially in contact. The tightening steel bar 10 drives the L-shaped fixing frame 2 to make the steel sealing plate 1 squeeze the annular sealing ring 8 to completely adhere to the guide slope 18 of the hollow steel plate 13.

[0052] e. Tighten and temporarily fix the reinforcing bar 10. After observing that there is no obvious leakage, pour the first layer of concrete. After the concrete has solidified, cut the reinforcing bar 10. Use the interlocking of the concrete and the reinforcing bar 10 to fix the pull plate device. Use the hollow steel plate 13 to provide a fixing point for the concrete and the pull plate device in the dewatering well pipe 16. Use the concrete and the pull plate device to wrap the hollow steel plate 13 to completely form a seal.

[0053] f. Pour the remaining concrete, weld the sealing plate, and weld it fully in place. If necessary, another sealing plate can be welded under the first sealing plate, and then concrete can be poured in between.

[0054] Although the embodiments of this utility model have been described in the specification, these embodiments are merely illustrative and should not limit the scope of protection of this utility model. Various omissions, substitutions, and modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A well sealing device for dewatering wells, characterized in that, The device includes a dewatering well pipe and a plate-pulling device. A positioning component is installed on the inner wall of the dewatering well pipe. A guide hole is provided in the center of the positioning component for the plate-pulling device to pass through. The inner edge of the positioning component slopes outwards and downwards to form a guide slope. The plate-pulling device is positioned entirely below the positioning component. The plate-pulling device includes a steel sealing plate, a guide sleeve A, and a rotating component. The guide sleeve A is ellipsoidally shaped, with its bottom surface fixedly connected to the upper surface of the steel sealing plate, and its curved surface fitting the guide slope. A through-hole is provided in the center of the guide sleeve A, forming an installation cavity with the upper surface of the steel sealing plate. The rotating component is installed within the installation cavity and is capable of driving the plate-pulling device to rotate vertically.

2. The well sealing device for dewatering wells as described in claim 1, characterized in that, The rotating assembly includes two L-shaped fixing brackets, bolts, reinforcing bars, steel wire ropes, elastic steel sheets, and double-hole steel sheets. The two L-shaped fixing brackets are symmetrically arranged in the center of the steel sealing plate. One end of each L-shaped fixing bracket is horizontal and fixedly connected to the upper surface of the steel sealing plate, while the other end is vertical and has a coaxial through hole.

3. The well sealing device for dewatering wells as described in claim 2, characterized in that, The bolt passes through two coaxial through holes; the reinforcing bar passes through the double-hole steel sheet and is fixedly connected to the double-hole steel sheet; the reinforcing bar is vertical and has a steel ring at its lower end, which is movably fitted onto the bolt.

4. The well sealing device for dewatering wells as described in claim 3, characterized in that, The wire rope movably passes through the double-hole steel sheet and its lower end is fixedly connected to the steel sealing plate; one end of the elastic steel sheet is fixedly connected to the steel sealing plate and the other end is fixedly connected to the double-hole steel sheet.

5. A well sealing device for dewatering wells as described in claim 4, characterized in that, The lower end of the wire rope is fixedly connected to the steel sealing plate by a fixing block. The fixing block is provided on the upper surface of the steel sealing plate, and the lower end of the wire rope is fixedly connected to the fixing block.

6. The well sealing device for dewatering wells as described in claim 1, characterized in that, The positioning component includes a hollow steel plate and a guide sleeve B. The hollow steel plate and the guide sleeve B are fixedly connected by a positioning pin B. The positioning pin B is fixedly disposed on the upper wall of the hollow steel plate and the upper end of the positioning pin B is inserted into the guide sleeve B.

7. A well sealing device for dewatering wells as described in claim 6, characterized in that, Both the guide sleeve B and the hollow steel plate have guide holes in their middle sections. The inner edge of the guide sleeve B slopes outward and upward to form a positioning slope, and the inner edge of the hollow steel plate slopes outward and downward to form a guide slope that fits with the guide sleeve A.

8. A well sealing device for dewatering wells as described in claim 7, characterized in that, The guide hole, the steel sealing plate, and the lower wall of the guide sleeve A are elliptical.

9. A well sealing device for dewatering wells as described in claim 1, characterized in that, The upper surface of the steel sealing plate is provided with a positioning pin A, and the steel sealing plate is fixedly connected to the guide sleeve A through the positioning pin A.

10. A well sealing device for dewatering wells as described in claim 1 or 9, characterized in that, The guide sleeve A is fitted with an annular sealing ring along its edge. The upper surface of the annular sealing ring has a groove, which is used to reduce the impact of fine sand and gravel on the fit between the guide sleeve A and the guide slope.

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