A sealing structure for dewatering wells and its construction method

Abstract

This application belongs to the field of building construction technology, specifically disclosing a sealing structure for a dewatering well, comprising: a well body, a sealing blind plate A, a sealing blind plate B, an inner steel cover plate, a top steel cover plate, a fixing component, and a clamping component; the sealing blind plate A is located inside the well body; a sealing ring for improving sealing performance is provided on the outer side of the sealing blind plate A, and a top sealing cylinder is fixedly installed on the top of the well body; the sealing blind plate B is located inside the top sealing cylinder, and a limit ring is fixedly installed on the inner side of the top sealing cylinder. A fixing component is provided on the inner side of the top steel cover plate, and a clamping component is provided on the sealing blind plate A. This application uses the fixing component on the top steel cover plate to clamp and fix the sealing blind plate A and sealing blind plate B inside the top sealing cylinder, realizing that the sealing blind plate A and sealing blind plate B can be directly placed inside the well body and the top sealing cylinder, and then fixed by the fixing component on the top steel cover plate, making the fixing more convenient.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and more specifically, to a dewatering well sealing structure and its construction method. Background Technology

[0002] Well dewatering is widely used in building construction, mainly for underground waterproofing and deep foundation pit construction. Well dewatering requires the pre-embedding of dewatering wells underground, which are then sealed after construction if sealing conditions are available.

[0003] In related technologies, when sealing dewatering wells, it is necessary to fill the well with sealing materials such as sand and cement, and finally weld a steel cover plate to the inside of the well for sealing. However, the waterproof effect of the fully welded steel cover plate is not good, and welding is inconvenient in the presence of water. Therefore, a sealing method using bolted connections has emerged. For example, the prior art publication CN210857249U provides a dewatering well sealing device and a dewatering well structure. This device uses a blind plate and flange to fix the first sealing of the dewatering well with screws and nuts, without welding, so that the fixing of the blind plate can be carried out even in the presence of water. After the blind plate stops the water, in order to enhance the water-stopping effect and ensure long-term leak-free operation, two steel cover plates are welded on top to better achieve water stopping.

[0004] Although the existing technical solutions mentioned above can achieve the effect of sealing the well without welding by connecting the water-stop blind plate with screws, the water-stop blind plate is in close contact with the inner wall of the well and is located inside the well, which makes it difficult to align the water-stop blind plate with the bolts and requires fixing multiple bolts, making the construction operation more complicated.

[0005] In view of this, we propose a sealing structure for dewatering wells and its construction method. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide a sealing structure for dewatering wells and its construction method, which solves the technical problem of the troublesome construction of fixing the water-stop blind plate inside the well and achieves the technical effect of facilitating the installation of the water-stop blind plate.

[0008] 2. Technical Solution

[0009] This application provides a dewatering well plugging structure, comprising: well body, plugging blind flange A, plugging blind flange B, internal steel cover plate, top steel cover plate, fixing components and clamping components;

[0010] The blind flange A is used to seal the main body of the well. The blind flange A is located on the inner side of the well body. A sealing ring is provided on the outer side of the blind flange A to improve the sealing performance. A top sealing cylinder is fixedly installed on the top of the well body. The height of the blind flange A is fifty millimeters.

[0011] The blind flange B is located inside the top sealing cylinder, and a limiting ring for supporting the blind flange B is fixedly provided inside the top sealing cylinder.

[0012] The inner steel cover plate is fixedly installed on the inner side of the top sealing cylinder, and the inner steel cover plate is located above the sealing blind plate B;

[0013] The top steel cover plate is fixedly installed on the top of the top sealing cylinder, and a fixing component is provided on the inner side of the top steel cover plate. The fixing component is used to fix the sealing blind plate B.

[0014] The clamping assembly is located at the top of the limiting cylinder, which is fixedly located at the top of the sealing blind plate A. The outer diameter of the limiting cylinder is larger than the inner diameter of the well body. The clamping assembly, under the push of the sealing blind plate B, clamps and fixes the sealing blind plate A to the inner side of the well body.

[0015] By adopting the above technical solution, during plugging, the plugging blind flange A is placed inside the well body. Under the limitation of the sealing ring, the plugging blind flange A is positioned at a certain depth. Then, the plugging blind flange B is placed inside the top plugging cylinder. At this time, the clamping component at the top of the limiting cylinder supports the plugging blind flange B, making the plugging blind flange B away from the limiting ring inside the top plugging cylinder. Then, with the support of the plugging blind flange B, the inner steel cover plate is placed inside the top plugging cylinder and welded to the top plugging cylinder. Finally, the top steel cover plate is aligned with the top of the top plugging cylinder and welded to the top plugging cylinder. Then, the fixing component inside the top steel cover plate pushes the plugging blind flange B downward, making the plugging blind flange B away from the bottom of the inner steel cover plate. And the clamping component presses the plugging blind flange A on the top of the well body, thus making the fixing of the plugging blind flange A and the plugging blind flange B inside the top plugging cylinder more convenient.

[0016] As an optional solution to the technical solution of this application, a retaining sleeve is fixedly provided on the outside of the sealing blind plate B. The retaining sleeve cooperates with the limiting ring. The retaining sleeve is located outside the limiting ring. The outer diameter of the retaining sleeve cooperates with the inner diameter of the top sealing cylinder. The sealing blind plate B is pressed against the top of the limiting ring under the push of the fixing component.

[0017] By adopting the above technical solution, when the blind flange B is pressed, the sleeve on the outside of the blind flange B engages with the outside of the limiting ring, thereby improving the sealing effect of the blind flange B on the top sealing cylinder.

[0018] As an optional solution to the technical solution of this application, the sealing blind plate B is located inside the top sealing cylinder under the support of the clamping assembly. At this time, the sealing blind plate B is located at the bottom of the inner steel cover plate, and the inner steel cover plate is located inside the top sealing cylinder under the support of the sealing blind plate B. The inner steel cover plate and the top sealing cylinder are fixedly installed by full welding.

[0019] By adopting the above technical solution, the inner steel cover plate is placed inside the top sealing cylinder with the support of the sealing blind flange B. The support of the sealing blind flange B facilitates the welding of the inner steel cover plate to the inside of the top sealing cylinder, thereby sealing the top sealing cylinder again.

[0020] As an optional solution to the technical solution of this application, the outer side of the top steel cover plate is symmetrically fixed with limiting grooves, and the upper end of the top sealing cylinder is symmetrically fixed with two side plates; the limiting grooves are slidably disposed on the outer side of the side plates, and welding holes are opened on the outer side of the limiting grooves; the top steel cover plate is slidably aligned with the top of the top sealing cylinder through the cooperation of the limiting grooves and the side plates; the fixing component on the inner side of the top steel cover plate passes through the inner steel cover plate to push the sealing blind plate B to move.

[0021] By adopting the above technical solution, when assembling the top steel cover plate, the limiting grooves on both sides of the top steel cover plate are matched with the outer edge plate of the top sealing cylinder. Then, the top steel cover plate is slid to align with the top of the top sealing cylinder. At this time, when the fixing component is running before welding, the top steel cover plate will not slide relative to the top sealing cylinder, thus limiting the top steel cover plate. When the top steel cover plate and the top sealing cylinder are fully welded together, the part blocked by the limiting groove can be welded through the welding hole, making the assembly of the top steel cover plate and the top sealing cylinder more convenient, and also facilitating the fixing component to fix the sealing blind plate A and the sealing blind plate B.

[0022] As an optional solution to the technical solution of this application, the fixing assembly includes a lead screw, a threaded sleeve A, a threaded sleeve B, and a hand crank. The lead screw is threaded on the outside of the threaded sleeve A, and the threaded sleeve A is fixedly mounted on the center of the top steel cover plate. A hand crank is fixedly mounted on the top of the lead screw. The threaded sleeve B is threaded on the outside of the lead screw and is fixedly mounted on the inside of the inner steel cover plate. The inner side of the inner steel cover plate is provided with a core hole for fixing and assembling the threaded sleeve B. When the lead screw is fed, it pushes the sealing blind plate B against the top of the clamping assembly.

[0023] By adopting the above technical solution, after the top steel cover plate and the top sealing cylinder are engaged, the screw is rotated by hand to feed downward inside the threaded sleeve A, then into the inner side of the threaded sleeve B, and continues to feed downward to push the sealing blind plate B downward. When the sealing blind plate B moves, the compression clamping assembly causes the limiting cylinder to press the sealing blind plate A. When the screw can no longer rotate, it means that the sealing blind plate B has reached the top of the limiting ring. At this time, both the sealing blind plate B and the sealing blind plate A are pressed and fixed, which makes the installation and fixing of the sealing blind plate A and the sealing blind plate B more convenient.

[0024] As an optional solution to the technical solution of this application, the clamping assembly includes an elastic steel plate and a connecting ring, wherein a plurality of elastic steel plates are evenly distributed and rotatably arranged on the connecting ring;

[0025] The other end of the elastic steel plate is rotatably set on the top of the limiting cylinder. The connecting ring is located at the bottom of the sealing blind plate B. Under the pressure of the sealing blind plate B, the connecting ring causes the elastic steel plate to bend and deform, and the original height of the connecting ring is higher than the top of the limiting ring.

[0026] By adopting the above technical solution, when the elastic steel plate is in the initial state, the elastic steel plate support connecting ring is at the highest point. When the blind sealing plate B is placed inside the top sealing cylinder, it is supported by the connecting ring. When the blind sealing plate B moves downward and is pressed under the action of the fixing component, the fixing component will press the elastic steel plate to continue bending until the blind sealing plate B is at the top of the limiting ring. At this time, the elastic steel plate is always in a pressed state, and always exerts pressure on the limiting cylinder. Even if the blind sealing plate A settles slightly, it can still press the limiting cylinder.

[0027] As an optional solution to the technical solution of this application, a bracket is fixedly provided on the inner side of the limiting cylinder, and a support ring is fixedly provided on the upper end of the bracket; the elastic steel plates are all located on the outer side of the support ring, and the elastic steel plates maintain their initial bent state under the support of the support ring.

[0028] By adopting the above technical solution, the initial state of the elastic steel plate is supported by the support ring to ensure that when the blind sealing plate B presses down on the elastic steel plate, the elastic steel plate can continue to bend and deform along the bending direction, so that the blind sealing plate B gradually moves closer to the top of the limiting ring.

[0029] As an optional solution to the technical solution of this application, the interior of the well body is filled with sand and mud from bottom to top to form a sand and gravel filling section, which accounts for two-thirds of the total length of the well body. The interior of the well body is filled with impermeable concrete at the top of the sand and gravel filling section to form a concrete filling section. The distance between the concrete filling section and the top of the well body is greater than the depth of the sealing blind plate A inside the well body and does not exceed fifty millimeters. The inner side of the top sealing cylinder is filled with impermeable concrete outside the limiting cylinder.

[0030] By adopting the above technical solution, before installing the blind flange A, the inside of the well body is first filled with sand and gravel, and mud is poured in to form a sand and gravel filling section. Then, impermeable concrete is filled on top of the sand and gravel filling section to form a concrete filling section. When the blind flange A is placed inside the well body, it is supported by the concrete filling section. When the blind flange A is compressed, the concrete inside the well body gradually settles. At the same time, the limiting cylinder at the top of the blind flange A moves closer to the top of the well body, and finally seals the top of the well body.

[0031] This invention provides a construction method for a dewatering well plugging structure, comprising the following steps:

[0032] S1. When sealing the main body of the well, first fill the inside of the well body with sand and gravel blocks, the filling height accounting for two-thirds of the height of the well body. At the same time, inject mud to fill the gaps between the sand and gravel to form a sand and gravel filling section. Then, fill the top of the sand and gravel filling section with impermeable concrete to form a concrete filling section. The distance between the concrete filling section and the top of the well body is greater than the depth of the sealing blind plate A inside the well body, and does not exceed fifty millimeters.

[0033] S2. Then, the blind flange A is placed inside the main body of the well. At this time, the blind flange A is supported by the concrete filling section. The limiting cylinder at the top of the blind flange A does not contact the top of the main body of the well. At this time, the clamping component at the top of the limiting cylinder is in the initial state.

[0034] S3. Next, place the sealing blind flange B inside the top sealing cylinder and support the sealing blind flange B through the clamping assembly. At this time, the sealing blind flange B is located above the limit ring.

[0035] S4. At this time, with the support of the sealing blind flange B, the inner steel cover plate is placed inside the top sealing cylinder. With the support of the sealing blind flange B, the inner steel cover plate is welded to the inside of the top sealing cylinder by circumferential welding, and the top sealing cylinder is sealed again.

[0036] S5. Finally, align the top steel cover plate with the top of the top sealing cylinder and weld the top steel cover plate to the top sealing cylinder by circumferential welding.

[0037] S6. Press down and fix the sealing blind plate B inside the top sealing cylinder through the fixing components on the top steel cover plate;

[0038] S8. At this time, the sealing blind plate B presses down on the clamping assembly to press the limiting cylinder. When the sealing blind plate B is located at the top of the limiting ring, the fixing assembly cannot operate, indicating that the sealing blind plate B is pressed at the top of the limiting ring.

[0039] S7. At this time, the clamping component always exerts pressure on the limiting cylinder. When the concrete filling section settles slightly, the clamping component can push the sealing blind plate A downward to continue sealing the main body of the well.

[0040] 3. Beneficial effects

[0041] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0042] (1) This application uses a fixing component on the top steel cover plate to press and fix the sealing blind plate A and sealing blind plate B inside the top sealing cylinder, which effectively solves the problem of the cumbersome construction of the fixing work inside the well. This allows the sealing blind plate A and sealing blind plate B to be placed directly inside the well body and the top sealing cylinder, and then fixed by the fixing component on the top steel cover plate, making the fixing more convenient.

[0043] (2) This application sets a clamping assembly between the sealing blind plate A and the sealing blind plate B. After the sealing blind plate B is clamped to the top of the limiting ring by the fixing assembly, the sealing blind plate B is clamped to the sealing blind plate A by the clamping assembly, so that the sealing blind plate A is clamped to the top of the well body for sealing. When the sealing blind plate A settles slightly, it can also automatically clamp the sealing blind plate A.

[0044] (3) This application provides a limiting groove and a side plate between the top steel cover plate and the top sealing cylinder. The cooperation of the limiting groove and the side plate facilitates the alignment of the top steel cover plate and the top sealing cylinder, and ensures the stability of the top steel cover plate when the fixed components are running.

[0045] (4) This application ensures the stability of the internal steel cover plate during the welding process by welding the internal steel cover plate to the inside of the top sealing cylinder under the support of the sealing blind plate B, making the welding of the internal steel cover plate more convenient, and does not affect the fixing of the sealing blind plate B by the fixing components. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of the well plugging structure for dewatering pipes disclosed in a preferred embodiment of this application;

[0047] Figure 2 This is a front view schematic diagram of a dewatering well plugging structure disclosed in a preferred embodiment of this application;

[0048] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0049] Figure 4 This is a schematic diagram of the overall exploded structure of the well plugging structure for dewatering pipes disclosed in a preferred embodiment of this application;

[0050] Figure 5 This is a schematic diagram of the assembly structure of the sealing blind plate B and the clamping assembly in the well sealing structure of the dewatering pipe disclosed in a preferred embodiment of this application;

[0051] The following are the labels in the diagram: 1. Well body; 11. Top sealing cylinder; 12. Edge plate; 13. Limiting ring; 2. Sealing blind flange A; 21. Limiting cylinder; 22. Sealing ring; 3. Sealing blind flange B; 31. Sleeve; 4. Internal steel cover plate; 41. Core hole; 5. Top steel cover plate; 51. Limiting groove; 52. Welding hole; 6. Fixing assembly; 61. Screw rod; 62. Threaded sleeve A; 63. Hand crank; 64. Threaded sleeve B; 7. Clamping assembly; 71. Elastic steel plate; 72. Connecting ring; 73. Bracket; 74. Support ring; 8. Sand and gravel filling section; 9. Concrete filling section. Detailed Implementation

[0052] The present application will be further described in detail below with reference to the accompanying drawings.

[0053] Reference Figure 1 , Figure 3 and Figure 4 This application discloses a well plugging structure for dewatering pipes, including a well body 1, a plugging blind plate A2, a plugging blind plate B3, an inner steel cover plate 4, a top steel cover plate 5, a fixing component 6, and a clamping component 7.

[0054] The blind flange A2 is used to seal the top of the well body 1. A top sealing cylinder 11 is fixedly installed on the top of the well body 1. The blind flange A2 is located inside the well body 1. A sealing ring 22 is provided on the outside of the blind flange A2 to improve the sealing performance. A limit cylinder 21 is fixedly installed on the top of the blind flange A2.

[0055] The height of the blind flange A2 is fifty millimeters;

[0056] The limiting cylinder 21 is located at the top of the well body 1. A limiting ring 13 is fixedly installed on the inner side of the top sealing cylinder 11, and a sealing blind plate B3 is fixedly installed on the top of the limiting ring 13. The sealing blind plate B3 is used to seal the top sealing cylinder 11 once.

[0057] An inner steel cover plate 4 is fully welded and fixed on the inner side of the top sealing cylinder 11 above the sealing blind plate B3. The inner steel cover plate 4 is used to re-seal the top sealing cylinder 11. A top steel cover plate 5 is fully welded and fixed on the top of the top sealing cylinder 11. The top steel cover plate 5 is used to seal the top of the top sealing cylinder 11. A fixing component 6 is provided on the inner side of the top steel cover plate 5. The fixing component 6 is used to fix the sealing blind plate B3. A pressing component 7 is provided on the sealing blind plate A2. The sealing blind plate B3 presses and fixes the limiting cylinder 21 through the pressing component 7.

[0058] During sealing, the blind flange A2 is placed inside the well body 1. Under the constraint of the sealing ring 22, the blind flange A2 is positioned at a certain depth. Then, the blind flange B3 is placed inside the top sealing cylinder 11. At this time, the clamping assembly 7 at the top of the limiting cylinder 21 supports the blind flange B3, keeping it away from the limiting ring 13 inside the top sealing cylinder 11. Then, with the support of the blind flange B3, the inner steel cover plate 4 is placed inside the top sealing cylinder 11, and the inner steel cover plate... 4. Weld and fix the top sealing cylinder 11. Finally, align the top steel cover plate 5 with the top of the top sealing cylinder 11 and weld and fix it to the top sealing cylinder 11. Then, push the sealing blind plate B3 downward through the fixing component 6 on the inner side of the top steel cover plate 5, so that the sealing blind plate B3 is away from the bottom of the inner steel cover plate 4. And press the sealing blind plate A2 on the top of the well body 1 through the pressing component 7, so that the sealing blind plate A2 and the sealing blind plate B3 are more conveniently fixed inside the top sealing cylinder 11.

[0059] Reference Figure 3 and Figure 5 A retaining sleeve 31 is fixedly installed on the outside of the sealing blind flange B3. The retaining sleeve 31 cooperates with the limiting ring 13. The outer diameter of the retaining sleeve 31 cooperates with the inner diameter of the top sealing cylinder 11. The sealing blind flange B3 is fixedly installed with the limiting ring 13 under the action of the fixing component 6.

[0060] When the blind flange B3 is pressed tight, the sleeve 31 on the outside of the blind flange B3 engages with the outside of the limiting ring 13, which improves the sealing effect of the blind flange B3 on the top sealing cylinder 11.

[0061] Reference Figure 1 , Figure 2 and Figure 4 The fixing component 6 includes a lead screw 61, a threaded sleeve A62, a threaded sleeve B64, and a hand crank 63;

[0062] The lead screw 61 is threaded inside the threaded sleeve A62, which is fixedly mounted on the center of the top steel cover plate 5. A handwheel 63 is fixedly mounted on the top of the lead screw 61. A threaded sleeve B64 is threaded on the outside of the lead screw 61 and is fixedly mounted on the center of the inner side of the inner steel cover plate 4. A core hole 41 for assembling the threaded sleeve B64 is opened on the inner side of the inner steel cover plate 4. When the lead screw 61 rotates, it feeds downward and pushes the sealing blind plate B3 downward. The sealing blind plate B3 presses the limiting cylinder 21 against the top of the well body 1 through the clamping assembly 7.

[0063] After the top steel cover plate 5 is fixedly engaged with the top sealing cylinder 11, the screw 61 is rotated by the hand crank 63, causing the screw 61 to feed downward inside the threaded sleeve A62, then into the threaded sleeve B64, and continue to feed downward to push the sealing blind plate B3 downward. When the sealing blind plate B3 moves, the compression clamping assembly 7 causes the limiting cylinder 21 to press the sealing blind plate A2. When the screw 61 can no longer rotate, it means that the sealing blind plate B3 has reached the top of the limiting ring 13. At this time, both the sealing blind plate B3 and the sealing blind plate A2 are pressed and fixed, which makes the installation and fixing of the sealing blind plate A2 and the sealing blind plate B3 more convenient.

[0064] Reference Figure 1 and Figure 4 A limiting groove 51 is symmetrically fixed on the outer side of the top steel cover plate 5, and two side plates 12 are symmetrically fixed on the upper end of the top sealing cylinder 11. The limiting groove 51 is slidably disposed on the outer side of the side plate 12, and a welding hole 52 for welding the top steel cover plate 5 and the top sealing cylinder 11 is opened on the outer side of the limiting groove 51.

[0065] When assembling the top steel cover plate 5, the limiting grooves 51 on both sides of the top steel cover plate 5 are matched with the edge plate 12 on the outside of the top sealing cylinder 11. Then, the top steel cover plate 5 is slid to align with the top of the top sealing cylinder 11. At this time, when the screw 61 is rotated before welding, the top steel cover plate 5 will not slide relative to the top sealing cylinder 11, which has a limiting effect on the top steel cover plate 5. When the top steel cover plate 5 and the top sealing cylinder 11 are fully welded together, the part blocked by the limiting groove 51 can be welded through the welding hole 52, making the assembly of the top steel cover plate 5 and the top sealing cylinder 11 more convenient, and also facilitating the fixing of the fixing component 6 to fix the sealing blind plate A2 and the sealing blind plate B3.

[0066] Reference Figure 4 and Figure 5 The clamping assembly 7 includes a resilient steel plate 71 and a connecting ring 72;

[0067] The connecting ring 72 is provided with several elastic steel plates 71 evenly distributed for rotation;

[0068] The other end of each elastic steel plate 71 is rotatably mounted on the top of the limiting cylinder 21, and the connecting ring 72 is located at the bottom of the sealing blind plate B3. The elastic steel plates 71 are all in a bent state, and the original height of the connecting ring 72 is higher than the top of the limiting ring 13.

[0069] When the elastic steel plate 71 is in its initial state, the elastic steel plate 71 supports the connecting ring 72 at its highest point. When the blind sealing plate B3 is placed inside the top sealing cylinder 11, it is supported by the connecting ring 72. When the blind sealing plate B3 moves downward and is pressed under the action of the fixing component 6, the fixing component 6 will press the elastic steel plate 71 to continue bending until the blind sealing plate B3 is located at the top of the limiting ring 13. At this time, the elastic steel plate 71 is always in a pressed state, and always exerts pressure on the limiting cylinder 21. Even if the blind sealing plate A2 settles slightly, it can still press the limiting cylinder 21.

[0070] Reference Figure 4 and Figure 5 A bracket 73 is fixedly installed on the inner side of the limiting cylinder 21, and a support ring 74 is fixedly installed on the upper end of the bracket 73; several elastic steel plates 71 are located on the outer side of the support ring 74, and the elastic steel plates 71 are bent under the support of the support ring 74.

[0071] The initial state of the elastic steel plate 71 is supported by the support ring 74 to ensure that when the blind sealing plate B3 presses down on the elastic steel plate 71, the elastic steel plate 71 can continue to bend and deform along the bending direction, so that the blind sealing plate B3 gradually moves closer to the top of the limiting ring 13.

[0072] Reference Figure 3 The interior of the main body 1 is filled with sand and mud from bottom to top to form a sand and gravel filling section 8. The sand and gravel filling section 8 accounts for two-thirds of the total length of the main body 1. The interior of the main body 1, above the sand and gravel filling section 8, is filled with impermeable concrete to form a concrete filling section 9. The distance between the concrete filling section 9 and the top of the main body 1 is greater than the depth of the blind flange A2 inside the main body 1, and does not exceed fifty millimeters.

[0073] Before installing the blind flange A2, the inside of the well body 1 is filled with sand and gravel, and mud is poured in to form a sand and gravel filling section 8. Then, impermeable concrete is filled on top of the sand and gravel filling section 8 to form a concrete filling section 9. After the blind flange A2 is placed inside the well body 1, it is supported by the concrete filling section 9. When the blind flange A2 is compressed, the concrete inside the well body 1 gradually settles. At the same time, the limiting cylinder 21 at the top of the blind flange A2 moves closer to the top of the well body 1, and finally seals the top of the well body 1.

[0074] Reference Figure 1-5 This invention provides a construction method for a dewatering well plugging structure, comprising the following steps:

[0075] S1. When sealing the main body 1 of the well, first fill the interior of the main body 1 with sand and gravel blocks, the filling height accounting for two-thirds of the height of the main body 1 of the well. At the same time, inject mud to fill the gaps between the sand and gravel, forming a sand and gravel filling section 8. Then, fill the top of the sand and gravel filling section 8 with impermeable concrete to form a concrete filling section 9. The distance between the concrete filling section 9 and the top of the main body 1 of the well is greater than the depth of the sealing blind plate A2 inside the main body 1 of the well, and does not exceed fifty millimeters.

[0076] S2. Then place the blind sealing plate A2 inside the well body 1. At this time, the blind sealing plate A2 is supported by the concrete filling section 9. The limiting cylinder 21 at the top of the blind sealing plate A2 does not contact the top of the well body 1. At this time, the pressing component 7 at the top of the limiting cylinder 21 is in the initial state.

[0077] S3. Next, place the sealing blind flange B3 inside the top sealing cylinder 11 and support the sealing blind flange B3 with the clamping assembly 7. At this time, the sealing blind flange B3 is located above the limiting ring 13.

[0078] S4. At this time, with the support of the sealing blind flange B3, the inner steel cover plate 4 is placed inside the top sealing cylinder 11. Under the support of the sealing blind flange B3, the inner steel cover plate 4 is welded to the inside of the top sealing cylinder 11 by circumferential welding, and the top sealing cylinder 11 is sealed again.

[0079] S5. Finally, align the top steel cover plate 5 with the top of the top sealing cylinder 11 and weld the top steel cover plate 5 onto the top sealing cylinder 11 by circumferential welding.

[0080] S6. The sealing blind plate B3 inside the top sealing cylinder 11 is pressed down and fixed by the fixing component 6 on the top steel cover plate 5;

[0081] S7. At this time, the sealing blind flange B3 presses down the clamping assembly 7 to press the limiting cylinder 21. When the sealing blind flange B3 is located at the top of the limiting ring 13, the fixing assembly 6 cannot operate, indicating that the sealing blind flange B3 is pressed at the top of the limiting ring 13.

[0082] S8. At this time, the clamping component 7 always exerts pressure on the limiting cylinder 21. When the concrete filling section 9 settles slightly, the clamping component 7 can push the sealing blind plate A2 downward to continue sealing the main body 1 of the well.

[0083] In summary, the working principle of the dewatering well plugging structure of the present invention is as follows: During use, firstly, sand and gravel blocks are filled into the interior of the well body 1, with the filling height accounting for two-thirds of the height of the well body 1. Simultaneously, mud is injected to fill the gaps between the sand and gravel, forming a sand and gravel filling section 8. Then, impermeable concrete is filled on top of the sand and gravel filling section 8 to form a concrete filling section 9. The distance between the concrete filling section 9 and the top of the well body 1 is greater than the depth of the plugging blind plate A2 inside the well body 1, but does not exceed fifty millimeters. Then, the plugging blind plate A2 is placed inside the well body 1. At this time, the concrete filling section 9 supports the plugging blind plate A2, and the limiting cylinder 21 at the top of the plugging blind plate A2 does not contact the top of the well body 1. 1. The top clamping assembly 7 is in its initial state. When the sealing blind flange B3 is placed inside the top sealing cylinder 11, the sealing blind flange B3 is supported by the clamping assembly 7. At this time, the sealing blind flange B3 is located above the limiting ring 13. With the support of the sealing blind flange B3, the inner steel cover plate 4 is placed inside the top sealing cylinder 11. The support of the sealing blind flange B3 facilitates the full welding of the inner steel cover plate 4 to the inner side of the top sealing cylinder 11, thus sealing the top sealing cylinder 11 again. Finally, the top steel cover plate 5 is assembled on the top of the top sealing cylinder 11. When assembling the top steel cover plate 5, the limiting grooves 51 on both sides of the top steel cover plate 5 are engaged with the edge plate 12 on the outer side of the top sealing cylinder 11. Then, the top steel cover plate 5 is slid to the top. With the top of the sealing cylinder 11 aligned, when the screw 61 is rotated before welding, the top steel cover plate 5 will not slide relative to the top sealing cylinder 11, thus limiting the position of the top steel cover plate 5. The top steel cover plate 5 and the top sealing cylinder 11 are fully welded together. The welding hole 52 facilitates welding of the part blocked by the limiting groove 51. By rotating the screw 61 with the hand crank 63, the screw 61 is fed downward inside the threaded sleeve A62, then enters the inner side of the threaded sleeve B64, and continues to feed downward, pushing the sealing blind plate B3 downward. When the sealing blind plate B3 moves, the compression clamping assembly 7 causes the limiting cylinder 21 to press the sealing blind plate A2. When the elastic steel plate 71 in the clamping assembly 7 is in the initial state, the elastic steel plate 71 supports the connection. Ring 72 is located at the highest point. When the blind flange B3 is placed inside the top sealing cylinder 11, it is supported by the connecting ring 72. When the blind flange B3 moves downward and is pressed under the action of the fixing component 6, the fixing component 6 will press the elastic steel plate 71 to continue bending. When the screw 61 cannot rotate, it means that the blind flange B3 has reached the top of the limiting ring 13. The sleeve 31 on the outside of the blind flange B3 is engaged with the outside of the limiting ring 13, which improves the sealing effect of the blind flange B3 on the top sealing cylinder 11. At this time, the elastic steel plate 71 is always in a pressed state, and always exerts pressure on the limiting cylinder 21. When the concrete filling section 9 settles slightly, the pressing component 7 can push the blind flange A2 downward to continue to seal the well body 1, which improves the sealing effect.

[0084] This invention uses a fixing component on the top steel cover plate to press and fix the sealing blind plate A and sealing blind plate B inside the top sealing cylinder, thus effectively solving the problem of cumbersome construction work inside the well. This allows the sealing blind plate A and sealing blind plate B to be placed directly inside the well body and the top sealing cylinder, and then fixed by the fixing component on the top steel cover plate, making the fixing more convenient.

[0085] This application involves setting a clamping assembly between blind flange A and blind flange B. After blind flange B is clamped to the top of the limiting ring by the fixing assembly, blind flange B clamps blind flange A through the clamping assembly, so that blind flange A is clamped to the top of the well body for sealing. When blind flange A settles slightly, it can also be automatically clamped.

[0086] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A well plugging structure for dewatering pipes, comprising: a well body, a plugging blind flange A, a plugging blind flange B, an inner steel cover plate, a top steel cover plate, a fixing assembly, and a clamping assembly; characterized in that: The blind sealing plate A is located inside the well body and is used to seal the well body. A sealing ring is provided on the outside of the blind sealing plate A, and a top sealing cylinder is fixedly installed on the top of the well body. The blind flange B is located inside the top sealing cylinder, and a limiting ring is fixedly installed inside the top sealing cylinder to support the blind flange B. The inner steel cover plate is fixedly installed on the inner side of the top sealing cylinder, and the inner steel cover plate is located above the sealing blind plate B; The top steel cover plate is fixedly installed on the top of the top sealing cylinder; A fixing component is provided on the inner side of the top steel cover plate, which is used to fix the sealing blind plate B; A limit cylinder is fixedly installed at the top of the blind flange A; The clamping assembly is located at the top of the limiting cylinder; The outer diameter of the limiting cylinder is larger than the inner diameter of the well body, and the clamping assembly presses and fixes the sealing blind plate A to the inner side of the well body under the push of the sealing blind plate B; The fixing assembly includes a lead screw, a threaded sleeve A, a threaded sleeve B, and a hand crank. The lead screw is threaded on the outside of the threaded sleeve A. The threaded sleeve A is fixedly mounted on the center of the top steel cover plate. The hand crank is fixedly mounted on the top of the lead screw. The threaded sleeve B is threaded on the outside of the lead screw. The threaded sleeve B is fixedly mounted on the inside of the inner steel cover plate. The inside of the inner steel cover plate is provided with a core hole for fixing and assembling the threaded sleeve B. When the lead screw is fed, it pushes the sealing blind plate B against the top of the clamping assembly. The clamping assembly includes an elastic steel plate and a connecting ring. Several elastic steel plates are evenly distributed and rotatably arranged on the connecting ring. The other end of each elastic steel plate is rotatably arranged on the top of the limiting cylinder. The connecting ring is located at the bottom of the sealing blind plate B. Under the pressure of the sealing blind plate B, the connecting ring causes the elastic steel plate to bend and deform, and the original height of the connecting ring is higher than the top of the limiting ring. A bracket is fixedly installed on the inner side of the limiting cylinder, and a support ring is fixedly installed on the upper end of the bracket; the elastic steel plates are all located on the outer side of the support ring, and the elastic steel plates maintain their initial bent state under the support of the support ring.

2. The well plugging structure for dewatering pipes according to claim 1, characterized in that: A retaining sleeve is fixedly installed on the outside of the sealing blind plate B. The retaining sleeve is located outside the limiting ring. The outer diameter of the retaining sleeve matches the inner diameter of the top sealing cylinder. The sealing blind plate B is pressed against the top of the limiting ring by the pushing of the fixing component.

3. The well plugging structure for dewatering pipes according to claim 1, characterized in that: The blind sealing plate B is located inside the top sealing cylinder under the support of the clamping assembly. At this time, the blind sealing plate B is located at the bottom of the inner steel cover plate, and the inner steel cover plate is located inside the top sealing cylinder under the support of the blind sealing plate B. The inner steel cover plate and the top sealing cylinder are fixedly installed by full welding.

4. The well plugging structure for dewatering pipes according to claim 1, characterized in that: The top steel cover plate is symmetrically fixed with limiting grooves on its outer side, and two side plates are symmetrically fixed at the upper end of the top sealing cylinder. The limiting grooves are slidably disposed on the outer side of the side plates, and welding holes are opened on the outer side of the limiting grooves. The top steel cover plate is slidably aligned with the top of the top sealing cylinder through the cooperation of the limiting grooves and the side plates. The fixing component on the inner side of the top steel cover plate passes through the inner steel cover plate to push the sealing blind plate B to move.

5. The well plugging structure for dewatering pipes according to claim 1, characterized in that: The well body is filled with sand and mud from bottom to top to form a sand and gravel filling section, which accounts for two-thirds of the total length of the well body. The interior of the well body is filled with impermeable concrete at the top of the sand and gravel filling section to form a concrete filling section.

6. The well plugging structure for dewatering pipes according to claim 5, characterized in that: The distance between the concrete filling section and the top of the well body is greater than the depth of the sealing blind plate A inside the well body, but does not exceed fifty millimeters.

7. A construction method for a dewatering well plugging structure as described in claim 6, characterized in that... Includes the following steps: S1. When sealing the main body of the well, first fill the inside of the well body with sand and gravel blocks, the filling height accounting for two-thirds of the height of the well body. At the same time, inject mud to fill the gaps between the sand and gravel to form a sand and gravel filling section. Then fill the top of the sand and gravel filling section with impermeable concrete to form a concrete filling section. The distance between the concrete filling section and the top of the well body is greater than the depth of the sealing blind plate A inside the well body, and does not exceed fifty millimeters. S2. Next, place the blind sealing plate A inside the main body of the well. At this time, the blind sealing plate A is supported by the concrete filling section. The limiting cylinder at the top of the blind sealing plate A does not contact the top of the main body of the well. At this time, the clamping component at the top of the limiting cylinder is in the initial state. S3. Place the sealing blind flange B inside the top sealing cylinder and support the sealing blind flange B through the clamping assembly. At this time, the sealing blind flange B is located above the limit ring. S4. At this time, with the support of the sealing blind flange B, the inner steel cover plate is placed inside the top sealing cylinder. With the support of the sealing blind flange B, the inner steel cover plate is welded to the inside of the top sealing cylinder by circumferential welding, and the top sealing cylinder is sealed again. S5. Finally, align the top steel cover plate with the top of the top sealing cylinder and weld the top steel cover plate to the top sealing cylinder by circumferential welding. S6. Press down and fix the sealing blind plate B inside the top sealing cylinder through the fixing components on the top steel cover plate; S7. At this time, the sealing blind plate B presses down on the clamping assembly to press the limiting cylinder. When the sealing blind plate B is located at the top of the limiting ring, the fixing assembly cannot operate, indicating that the sealing blind plate B is pressed on the top of the limiting ring. S8. At this time, the clamping component always exerts pressure on the limiting cylinder. When the concrete filling section settles slightly, the clamping component can push the sealing blind plate A downward to continue sealing the main body of the well.

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