Basement dewatering well sealing system and sealing method

Abstract

The present invention provides a basement dewatering well sealing system and method, which are used to solve the problem in the prior art that dewatering wells are difficult to completely seal in areas with a large amount of groundwater. The system comprises a well pipe sealing device, a wellhead sealing device, a first crushed stone layer and a second crushed stone layer. The well pipe of the dewatering well is sealed by the well pipe sealing device, thereby reducing the amount of groundwater located at the wellhead, thereby reducing the water pressure of the groundwater and facilitating the wellhead sealing device to seal the wellhead of the dewatering well. A first-level seal of the wellhead is formed by supporting the metal sealing component through the wellhead cover plate and the supporting assembly of the wellhead sealing device, a second-level seal is formed in the casing by using the concrete layer, a third-level seal is formed in the casing by using the elastic sealing component, and a fourth-level seal is formed by using the threaded connection between the casing sealing cover and the casing, thereby preventing groundwater leakage and ensuring the sealing effect of the dewatering well.

Description

Technical Field

[0001] The invention belongs to the field of precipitation well blocking, and in particular relates to a basement precipitation well blocking system and blocking method. Background Art

[0002] When constructing a basement with a lot of groundwater, multiple dewatering wells will be built in the construction area. During the construction process, water pumps will be used to continuously extract groundwater from the dewatering wells to ensure that the remaining construction areas except the areas where the dewatering wells are built can be constructed smoothly. After the construction of the remaining construction areas is completed, the dewatering wells will be sealed to complete the construction of the entire basement.

[0003] Most existing drainage well sealing solutions involve directly filling the well pipe with gravel and other construction materials, and then installing a wellhead sealing device at the wellhead to seal it. This construction solution is only applicable to areas with less groundwater. In areas with abundant groundwater, since the well pipe is filled with gravel and other construction materials, the groundwater collected in the well will continue to flow toward the wellhead. As a result, when the wellhead sealing device is used to seal the wellhead, the wellhead is always in a state of groundwater. The wellhead sealing device also increases the water pressure of the groundwater at the wellhead, making it difficult for the wellhead sealing device to completely seal the wellhead. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a basement dewatering well sealing system and sealing method, which is used to solve the problem in the prior art that dewatering wells are difficult to completely seal in areas with a lot of groundwater.

[0005] In order to achieve the above-mentioned and other related purposes, the present invention provides a basement dewatering well sealing system, comprising: a well pipe sealing device, a wellhead sealing device, a first crushed stone layer and a second crushed stone layer; the well pipe sealing device is used to seal the well pipe of the dewatering well, and the wellhead sealing device is used to seal the wellhead of the dewatering well; the first crushed stone layer is arranged between the bottom of the dewatering well and the well pipe sealing device, and the second crushed stone layer is arranged between the well pipe sealing device and the wellhead sealing device; the dewatering wellhead sealing device comprises: a wellhead cover plate, a casing and a sealing structure; the wellhead cover plate comprises a groundwater outlet, the casing is fixed on the wellhead cover plate, and the inner hole of the casing is connected to the groundwater outlet; the sealing structure is used to seal the inner hole of the casing; the sealing structure comprises a metal seal, a support assembly, a mixed seal arranged from bottom to top in the casing Concrete layer, elastic sealing layer and casing sealing cover; the support assembly is used to fix the metal seal in the casing; the elastic sealing layer is used to fill the gap between the concrete layer and the casing sealing cover; the well pipe sealing device includes: a first sealing disk, an elastic seal, a second sealing disk, a seal transmission mechanism and a blocking mechanism; the elastic seal is arranged between the first sealing disk and the second sealing disk, and the seal transmission mechanism is slidably arranged on the first sealing disk, and is used to drive the elastic seal to undergo elastic deformation so that the elastic seal abuts against the inner wall of the well pipe of the dewatering well to seal the well pipe; the blocking mechanism is arranged on the second sealing disk, and when the elastic seal abuts against the inner wall of the well pipe, the blocking mechanism is used to limit the seal transmission mechanism to maintain the abutment between the elastic seal and the inner wall of the well pipe of the dewatering well.

[0006] Optionally, a second step for limiting the metal seal is provided on the inner wall of the groundwater outlet of the wellhead cover; a plurality of slots are provided on the inner wall of the casing, and the support assembly includes a support rod, a limiting nut, a support seat, a plurality of support rods and a plurality of support blocks; the slots, support rods and support blocks are provided in a one-to-one correspondence; the support rod is provided on the metal seal, one end of the support rod is rotatably connected to the support seat, and the other end is rotatably connected to the support block; a connecting hole for the support rod to pass through is provided in the support seat, and the support block is used to connect to the slot; the limiting nut is threadedly connected to the support rod for limiting the support seat.

[0007] Optionally, the casing sealing cover is connected to the casing by threads; and / or a waterproof layer is provided at the connection between the wellhead cover plate and the wellhead of the precipitation well, the connection between the wellhead cover plate and the casing, and the connection between the casing and the casing sealing cover.

[0008] Optionally, the sealing transmission mechanism includes a plurality of first transmission components, a first transmission disk, a plurality of second transmission components, a second transmission disk and a transmission shaft component; the first sealing disk is provided with a plurality of guide grooves for guiding the movement of the first transmission component and the second transmission component; the guide grooves and the first transmission component and the second transmission component are arranged in a one-to-one correspondence; the first transmission component and the first transmission disk are rotationally connected, and the second transmission component and the second transmission disk are rotationally connected; the transmission shaft assembly is used to drive the first transmission disk and the second transmission disk to move, and then drive the first transmission component and the second transmission component to abut against the side of the elastic seal away from the well pipe, and then drive the elastic seal to undergo elastic deformation; the blocking mechanism is used to limit the transmission shaft assembly.

[0009] Optionally, the first group of transmission components includes a first connecting rod, a first slider and a first abutment; one end of the first connecting rod is rotatably connected to the first transmission disk, and the other end is rotatably connected to the first slider, the first slider is arranged in a guide groove, and the first abutment is arranged on the first slider; the second group of transmission components includes a second connecting rod, a second slider and a second abutment; one end of the second connecting rod is rotatably connected to the second transmission disk, and the other end is rotatably connected to the second slider, the second slider is arranged in the guide groove, and the second abutment is arranged on the second slider; the first abutment and the second abutment are used to abut against the elastic seal; when the elastic seal abuts against the side wall of the well pipe, multiple first abutments and multiple second abutments form a circular ring shape.

[0010] Optionally, the guide groove includes a first sub-guide groove and two second sub-guide grooves; the two second sub-guide grooves are respectively arranged on one of the two side walls opposite to each other of the first sub-guide groove; two protrusions are respectively provided on the first slider and the second slider, and the protrusions are arranged one-to-one corresponding to the second sub-guide grooves; and / or, the first sealing disk includes an avoidance hole and a sealing piece, the avoidance hole is connected to multiple guide grooves, and the sealing piece is used to block the avoidance hole.

[0011] Optionally, the transmission shaft assembly includes a first transmission shaft, a second transmission shaft and a first elastic member; a first sliding groove is provided on the second transmission shaft, the center line of the first sliding groove coincides with the center axis of the second transmission shaft, the first elastic member is arranged in the first sliding groove, one end of which is connected to the bottom of the first sliding groove, and the other end is connected to the first transmission shaft; the first transmission shaft is partially arranged in the first sliding groove; a first through hole is provided on the second transmission disk, and one end of the first transmission shaft extending out of the first sliding groove passes through the first through hole and is connected to the first transmission disk; the second transmission shaft is provided with one end of the first sliding groove for connecting to the second transmission disk; the blocking mechanism is used to limit the second transmission shaft.

[0012] Optionally, a plurality of second sliding grooves are provided on the outer surface of the second transmission shaft, and a limiting hole is provided at the bottom of the second sliding groove away from the connecting end of the second transmission shaft and the second transmission plate; a third through hole is provided on the second sealing plate for avoiding the first group of transmission components, the second group of transmission components and the transmission shaft assembly; the blocking mechanism includes a sealing cone, a plurality of second elastic members and a plurality of limiting columns; one end of the sealing cone is connected to the second sealing plate, and the other end is provided with a second through hole for the second transmission shaft to pass through; the sealing cone is also provided with a receiving cavity for accommodating the transmission shaft assembly, accommodating The cavity is connected to the second through hole; the inner side wall of the second through hole is provided with a plurality of mounting holes symmetrically arranged with the axis of the second through hole as the symmetry line, the limiting hole, the mounting hole, the second elastic member and the limiting column are arranged in a one-to-one correspondence, the limiting column part is arranged in the mounting hole, the second elastic member is arranged in the mounting hole, one end of the limiting column is connected to the bottom of the mounting hole, and the other end is connected to the limiting column, and the end of the limiting column extending out of the mounting hole is located in the second sliding groove; when the elastic sealing member abuts against the inner side wall of the well pipe, the end of the limiting column extending out of the mounting hole penetrates into the limiting hole, which is used to limit the second transmission shaft.

[0013] Optionally, the blocking mechanism further includes a sealing cover, and a connecting portion is provided on one end of the sealing cone away from the second sealing disk. The sealing cover is threadedly connected to the connecting portion for closing the second through hole.

[0014] Another aspect of the present invention provides a basement dewatering well plugging method, including a basement dewatering well plugging system as described above, and further comprising: a first gravel layer filling step: filling gravel material into the dewatering well to form a first gravel layer; a well pipe sealing device installation step: placing the well pipe sealing device into the well pipe of the dewatering well, pressing the sealing transmission mechanism downward so that the sealing transmission mechanism first contacts the inner ring of the elastic sealing member, and then continuously pressing the sealing transmission mechanism downward so that the elastic sealing member undergoes elastic deformation, so that the elastic sealing member Abut against the inner wall of the well pipe; second gravel layer filling step: fill the precipitation well with gravel material to form a second gravel layer; wellhead sealing device installation step: first apply cement mortar at the connection between the wellhead cover and the wellhead, and install the wellhead cover on the wellhead; then install the metal seal into the casing, and use the support assembly to limit the metal seal in the casing, and then fill the casing with concrete to form a slow-setting soil layer. After the concrete layer is formed, an elastic sealing layer is set on the concrete layer, and finally the casing is sealed with a casing sealing cover.

[0015] As described above, a basement dewatering well sealing system and sealing method of the present invention have at least the following beneficial effects: the present invention arranges a well pipe sealing device and a wellhead sealing device in the well pipe of the dewatering well, and the well pipe sealing device includes a first sealing disk, an elastic seal, a second sealing disk, a sealing transmission mechanism and a blocking mechanism; when in use, the elastic seal is elastically deformed by the driving of the sealing transmission mechanism, thereby achieving the abutment between the elastic seal and the inner wall of the well pipe, thereby achieving segmented sealing inside the dewatering well, reducing the amount of groundwater located at the wellhead when the wellhead sealing device seals the wellhead of the dewatering well, thereby reducing the water pressure of the groundwater, making it easier for the wellhead sealing device to seal the wellhead of the dewatering well, and providing a blocking mechanism, which can maintain the abutment of the elastic seal against the inner wall of the well pipe after the sealing transmission mechanism moves into place, thereby ensuring the sealing effect of the sealing device. The wellhead sealing device forms a primary seal at the wellhead by utilizing the support of the metal seal by the wellhead cover plate and the support assembly, a secondary seal by utilizing the concrete layer in the casing, a tertiary seal by the elastic seal in the casing, and a fourth seal by utilizing the threaded connection between the casing sealing cover and the casing, thereby preventing groundwater leakage and ensuring the sealing effect of the precipitation well. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a structural schematic diagram of a basement dewatering well blocking system according to the present invention.

[0017] Figure 2 Display as Figure 1 A local enlarged view of point A in the figure.

[0018] Figure 3 Shown is a schematic structural diagram of a wellhead cover plate and a casing of a wellhead sealing device of the present invention.

[0019] Figure 4 Shown is a schematic cross-sectional structural diagram of a wellhead cover plate and a casing of a wellhead sealing device of the present invention.

[0020] Figure 5 Shown is a structural schematic diagram of the sealing structure of the wellhead sealing device of the present invention.

[0021] Figure 6 Shown is a schematic structural diagram of the well pipe plugging device of the present invention.

[0022] Figure 7 It is a schematic structural diagram of the well pipe plugging device of the present invention with the blocking mechanism omitted.

[0023] Figure 8 It shows a schematic structural diagram of the well pipe plugging device of the present invention, omitting the blocking mechanism and the second sealing disk.

[0024] Figure 9It is a schematic structural diagram of the well pipe plugging device of the present invention, omitting the blocking mechanism, the first sealing disc, the second sealing disc and the elastic sealing member.

[0025] Figure 10 It shows a schematic structural diagram of the sealing cone of the well pipe plugging device of the present invention.

[0026] Figure 11 Shown is a partial cross-sectional schematic diagram of the sealing cone of the well pipe plugging device of the present invention.

[0027] Figure 12 Shown is a schematic structural diagram of the first sealing disk of the well pipe plugging device of the present invention. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] Please refer to all the following drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0030] The following embodiments are for illustration only and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0031] See also Figure 1-2The present invention provides a basement dewatering well sealing system, comprising: a well pipe sealing device 10, a wellhead sealing device 20, a first crushed stone layer 30 and a second crushed stone layer 40; the well pipe sealing device 10 is used to seal the well pipe of the dewatering well, and the wellhead sealing device 20 is used to seal the wellhead of the dewatering well; the first crushed stone layer 30 is arranged between the bottom of the dewatering well and the well pipe sealing device 10, and the second crushed stone layer 40 is arranged between the well pipe sealing device 10 and the wellhead sealing device 20; the dewatering well head sealing device 20 comprises: a wellhead cover plate 6, a casing 7 and a sealing structure 8; the wellhead cover plate 6 comprises a groundwater outlet, the casing 7 is fixed on the wellhead cover plate 6, and the inner hole of the casing 7 is connected to the groundwater outlet; the sealing structure 8 is used to seal the inner hole of the casing 7; the sealing structure 8 comprises a metal sealing member 81, a support assembly 82, a concrete layer 8 arranged from bottom to top in the casing 7 3. Elastic sealing layer 84 and casing sealing cover 85; the support assembly 82 is used to fix the metal seal 81 in the casing 7; the elastic sealing layer 84 is used to fill the gap between the concrete layer 83 and the casing sealing cover 85; the well pipe sealing device 10 includes: a first sealing disk 1, an elastic seal 2, a second sealing disk 3, a seal transmission mechanism and a blocking mechanism 5; the elastic seal 2 is arranged between the first sealing disk 1 and the second sealing disk 3, and the seal transmission mechanism is slidably arranged on the first sealing disk 1, and is used to drive the elastic seal 2 to undergo elastic deformation so that the elastic seal 2 abuts against the inner wall of the well pipe of the dewatering well to seal the well pipe; the blocking mechanism 5 is arranged on the second sealing disk 3, and when the elastic seal 2 abuts against the inner wall of the well pipe, the blocking mechanism 5 is used to limit the seal transmission mechanism to maintain the abutment of the elastic seal 2 with the inner wall of the well pipe of the dewatering well.

[0032] See also Figure 3-5The wellhead cover plate 6 can be a hollow cylindrical metal structure, and a groundwater outlet connected to the inner hole of the casing 7 is provided at its center line. The wellhead cover plate 6 can also include a first cover plate 62 and a second cover plate 63. The first cover plate 62 and the second cover plate 63 can be formed as one piece or separately, and then fixed together by welding or other methods. The diameter of the first cover plate 62 is smaller than the diameter of the second cover plate 63. The diameter of the first cover plate 62 is less than or equal to the diameter of the wellhead, and the diameter of the second cover plate 63 is greater than or equal to the diameter of the wellhead. A first sub-groundwater outlet 611 is provided at the center line of the first cover plate 62, and a second sub-groundwater outlet 612 is provided at the center line of the second cover plate 63. The diameter of the first sub-groundwater outlet 611 is smaller than the diameter of the second sub-groundwater outlet 612. In this way, a first step 64 for increasing the contact area with the wellhead and a second step for limiting the metal seal 81 are formed on the first cover plate 62 and the second cover plate 63. The casing 7 and second cover plate 63 can be formed separately and then secured together by welding or other means before construction of the precipitation well. The diameter of the inner bore of the casing 7 is equal to the diameter of the second sub-groundwater outlet 612. The diameter of the metal seal 81 is less than or equal to the diameter of the second sub-groundwater outlet 612 and greater than the diameter of the first sub-groundwater outlet 611. When in use, a portion of the support assembly 82 abuts the inner surface of the casing 7, while another portion abuts the metal seal 81, thereby retaining the metal seal 81 within the casing 7. The elastic sealing layer 84 can be a resilient disc-shaped structure made of a material such as rubber, and is used to fill the gap between the concrete layer 83 and the casing sealing cover 85. The end of the casing 7 away from the second cover plate 63 is provided with an external thread, and the casing sealing cover 85 is provided with an internal thread. The casing 7 and the casing sealing cover 85 are connected by threads. The thickness of the elastic sealing layer 84 can be greater than the gap between the concrete layer 83 and the casing sealing cover 85. Therefore, when the casing sealing cover 85 is installed on the casing 7, the elastic sealing layer 84 is compressed, thereby achieving close contact between the elastic seal 2 and the inner side of the casing 7. When filling the first crushed stone layer 30 and the second crushed stone layer 40, the crushed stone particles can be small near the well pipe sealing device 10 and the wellhead sealing device 20, and large at a position away from the wellhead sealing device 20 and the well pipe sealing device 10. This ensures that the crushed stone layer can fill the gaps between the various components of the well pipe sealing device 10 and facilitates the flatness of the surface on which the wellhead sealing device 20 and the well pipe sealing device 10 are installed.

[0033] In one implementation, a snap ring 9 is provided on the outer side of the connection between the sleeve 7 and the second cover plate 63. The snap ring 9 can be connected to the outer side of the sleeve 7 and the outer side of the second cover plate 63 by welding or other means to increase the connection strength between the sleeve 7 and the second cover plate 63. Ribs can also be provided on the sleeve 7 and the second cover plate 63 to support the sleeve 7 and prevent the sleeve 7 from deforming after a structure such as a slow-setting soil layer is installed inside the sleeve 7.

[0034] The second sealing disc 3 is disposed on the first sealing disc 1, and an elastic seal 2 for sealing the well pipe is disposed between the first sealing disc 1 and the second sealing disc 3. The diameters of the first sealing disc 1, the second sealing disc 3, and the elastic seal 2 are less than or equal to the diameter of the well pipe, so that when sealing the precipitation well, the sealing device can be placed into the well pipe of the precipitation well. The elastic seal 2 can be an annular structure made of rubber or other elastic materials. The outer ring of the elastic seal 2 is used to abut the inner wall of the well pipe, the inner ring is used to connect to the seal transmission mechanism, and the remaining side surfaces are used to connect to the first sealing disc 1 and the second sealing disc 3.

[0035] During construction of the basement drainage well sealing system of this embodiment, the number of well pipe sealing devices 10 used can be selected based on the depth of the drainage well. For example, if the drainage well is three meters deep, two well pipe sealing devices 10 can be used. During actual construction, the drainage well can be filled with a first layer of crushed stone 30, resulting in a layer of crushed stone or other building materials approximately one meter thick. The crushed stone material is then compacted using tools, and then the groundwater in the drainage well is pumped out using a water pump. After the pumping is completed, the well pipe sealing device 10 of this embodiment (for the sake of convenience, it is defined as the first well pipe sealing device 10) is placed into the drainage well, and a cylindrical tool can be used to press the seal transmission mechanism downward, so that the seal transmission mechanism first contacts the inner ring of the elastic seal 2. Then, as the tool continues to press the seal transmission mechanism downward, the elastic seal 2 is elastically deformed, so that the elastic seal 2 contacts the inner wall of the well pipe, and the part of the well pipe filled with gravel is sealed. At this time, a first sealing layer is formed between the first well pipe sealing device and the bottom of the well. At the same time, the blocking mechanism 5 automatically limits the seal transmission mechanism, and then the seal transmission mechanism can still maintain the elastic deformation of the elastic seal 2 after losing the downward force of the tool, thereby ensuring that the elastic seal 2 always contacts the inner wall of the well pipe. After the construction of the first sealing layer is completed, the tools are removed and the first gravel layer 30 is continued to be filled into the precipitation well, so that the precipitation well continues to be filled with a gravel layer of about one meter, and then the second well pipe sealing device is placed. Using the above method, the elastic sealing member 2 of the second well pipe sealing device is abutted against the inner wall of the well pipe to form a second sealing layer.

[0036] After the second sealing layer is completed, gravel is continuously filled into the dewatering well to form a second gravel layer 40 until the second gravel layer 40 reaches the wellhead position and a certain gap is left between the second gravel layer 40 and the top surface of the wellhead. At this point, the wellhead cover plate 6 can be installed on the wellhead, and then the groundwater collected between the wellhead cover plate 6 and the second gravel layer 40 can be pumped out using the inner hole of the casing 7 and the groundwater outlet of the wellhead cover plate 6. At this time, since the groundwater content in the construction area is relatively abundant, the water pump cannot pump out all the groundwater. Therefore, after the water pump has pumped out most of the groundwater, the groundwater level can be lower than the first cover plate 62 of the wellhead cover plate 6. The groundwater collected between the wellhead cover plate 6 and the second gravel layer 40 can be cooled by a cooling device to form a frozen layer. Liquid nitrogen can also be filled between the wellhead cover plate 6 and the second gravel layer 40 to form a frozen layer on the groundwater to prevent the groundwater from continuing to gather there. The metal seal 81 is then placed in the casing 7 and secured within it using the second step and support assembly 82. The casing 7 is then filled with concrete to form a slow-setting soil layer within the inner bore of the casing 7. Quick-drying concrete can be used to expedite construction. After the concrete layer 83 solidifies, an elastic sealing structure is installed in the gap between the concrete layer 83 and the wellhead, forming an elastic sealing layer 84. Finally, the casing sealing cap 85 is threadedly connected to the casing 7 using threads to seal the casing 7. After completing the sealing of the precipitation wellhead, a waterproof layer can be applied to the gaps of the various components of the wellhead sealing device 20. Specifically, a waterproof layer is provided at the connection between the wellhead cover plate 6 and the wellhead of the precipitation well, the connection between the wellhead cover plate 6 and the casing 7, and the connection between the casing 7 and the casing sealing cover 85 to further ensure the sealing effect of the wellhead sealing device 20. Finally, concrete is poured outside the wellhead sealing device 20 until it is flush with the ground of the basement, thereby completing the overall construction of the precipitation well.

[0037] In this embodiment, different numbers of well pipe sealing devices 10 are selected according to the different depths of the precipitation well, thereby dividing the precipitation well into different sealing layers. Different sealing layers are sealed using the well pipe sealing devices 10 of this embodiment. After sealing, the different sealing layers are prevented from penetrating into other sealing layers due to the action of the well pipe sealing devices 10. This reduces the amount of groundwater at the wellhead when the wellhead sealing device 20 seals the wellhead of the precipitation well, thereby reducing the water pressure of the groundwater and facilitating the wellhead sealing device 20 to seal the wellhead of the precipitation well. When sealing the wellhead, the wellhead cover plate 6 and the support assembly 82 support the metal seal 81 to form a primary seal at the wellhead, the concrete layer 83 forms a secondary seal in the casing 7, the elastic seal 2 forms a tertiary seal in the casing 7, and the threaded connection between the casing sealing cover 85 and the casing 7 forms a quaternary seal, thereby preventing groundwater leakage and ensuring the sealing effect of the precipitation well.

[0038] Please continue reading Figure 3-5 In one embodiment, the inner sidewall of the sleeve 7 is provided with a plurality of slots 71. The support assembly 82 includes a support rod 821, a retaining nut 822, a support seat 823, a plurality of support rods 821, and a plurality of support blocks 825. The slots 71, support rods 821, and support blocks 825 are provided in a one-to-one correspondence. The support rod 821 is provided on the metal seal 81, with one end of the support rod 821 rotatably connected to the support seat 823 and the other end of the support block 825 rotatably connected. The support seat 823 is provided with a connection hole for the support rod 821 to pass through, and the support block 825 is used to connect to the slot 71. The retaining nut 822 is threadedly connected to the support rod 821 to limit the position of the support seat 823. During use, the support seat 823 passes through the support rod 821 through the connection hole, and the support block 825 is placed in the slot 71. The retaining nut 822 is then used to position the upper end of the support seat 823, thereby securing the support seat 823 to the metal rod. The number of the slots 71 , the support rods 821 and the support blocks 825 may be three, four or the like, which is not limited in this embodiment.

[0039] See also Figure 6-8 In one embodiment, the sealing transmission mechanism includes a plurality of first transmission components 41, a first transmission disk 42, a plurality of second transmission components 43, a second transmission disk 44 and a transmission shaft assembly 45; the first sealing disk 1 is provided with a plurality of guide grooves 11 for guiding the movement of the first transmission component 41 and the second transmission component 43; the guide grooves 11 and the first transmission component 41 and the second transmission component 43 are arranged in a one-to-one correspondence; the first transmission component and the first transmission disk are rotationally connected, and the second transmission component 43 and the second transmission disk 44 are rotationally connected; the transmission shaft assembly 45 is used to drive the first transmission disk 42 and the second transmission disk 44 to move, and then drive the first transmission component 41 and the second transmission component 43 to abut against the side of the elastic seal 2 away from the well pipe, and then drive the elastic seal 2 to undergo elastic deformation; the blocking mechanism 5 is used to limit the transmission shaft assembly 45.

[0040] In this embodiment, three of the first and second transmission components 41 and 43 can be respectively provided, and six corresponding guide grooves 11 can be provided. When the well pipe sealing device 10 is placed as a whole into the precipitation well, the transmission shaft component 45 is pressed downward by a tool to drive the first and second transmission components 41 and 43 to slide in the guide groove 11, thereby realizing the first and second transmission components 41 and 43 to cause the elastic seal 2 to undergo elastic deformation, so that the elastic seal 2 abuts against the inner wall of the well pipe.

[0041] The first transmission assembly includes a first connecting rod 411, a first slider 412 and a first abutment 413; one end of the first connecting rod 411 is rotatably connected to the first transmission disk 42, and the other end is rotatably connected to the first slider, the first slider 412 is arranged in the guide groove 11, and the first abutment 413 is arranged on the first slider 412; the second transmission assembly includes a second connecting rod 431, a second slider 432 and a second abutment 433; one end of the second connecting rod 431 is rotatably connected to the second transmission disk 44, and the other end is rotatably connected to the second slider, the second slider 432 is arranged in the guide groove 11, and the second abutment 433 is arranged on the second slider 432; the first abutment 413 and the second abutment 433 are used to abut against the elastic seal 2; when the elastic seal 2 abuts against the side wall of the well pipe, multiple first abutments 413 and multiple second abutments 433 form a circular ring shape. The first abutment 413 and the second abutment 433 can each be an arc-shaped structure, which is fixedly arranged on the corresponding slider. When the transmission shaft assembly 45 moves downward, it drives the first abutment 413 and the second abutment 433 to slide along the guide groove 11, thereby causing the first abutment 413 and the second abutment 433 to enclose and form a circular ring structure, so that the inner ring of the elastic seal 2 is evenly stressed, thereby ensuring that the elastic seal 2 is evenly stressed in the circumferential direction and has the same elastic deformation. In this embodiment, when not in operation, the second abutment 433 is located near the central axis of the first sealing disk 1, and the first abutment 413 is located away from the central axis of the first sealing disk 1. In addition, in order to enable the first abutting member 413 and the second abutting member 433 to enclose a circular ring structure, the transmission shaft assembly 45 can first drive the first abutting member 413 to move to abut against the elastic seal 2, and only after the first abutting member 413 causes the elastic seal 2 to be elastically deformed, the transmission shaft assembly 45 drives the second abutting member 433 to move to abut against the elastic seal 2. At this time, the transmission shaft assembly 45 can no longer drive the first abutting member 413 to move, and can still maintain the abutment between the first abutting member 413 and the elastic seal 2. When the second abutting member 433 moves to abut against the elastic seal 2, the blocking mechanism 5 limits the first and second transmission assembly groups, thereby maintaining the abutment between the first and second abutting members 413, 433 and the elastic seal 2.

[0042] See also Figure 12In one implementation, the guide groove 11 includes a first sub-guide groove 111 and two second sub-guide grooves 112. The two second sub-guide grooves 112 are respectively disposed on one of the two opposing side walls of the first sub-guide groove 111. The first slider 412 and the second slider 432 are respectively provided with two protrusions 4121, which correspond one-to-one with the second sub-guide grooves 112. The provision of the second sub-guide grooves 112 ensures that the first slider 412 and the second slider 432 slide within the first sub-guide groove 111 and prevents the first slider 412 and the second slider 432 from falling out of the first sub-guide groove 111.

[0043] In one implementation, the first sealing disk 1 includes a clearance hole and a blocking member 12. The clearance hole is connected to the multiple guide grooves 11, and the blocking member 12 is used to block the clearance hole. The clearance hole is located at the center of the first sealing disk 1. The blocking member 12 is a disc-shaped structure used to block the clearance hole. The arrangement of the clearance hole and the blocking member 12 not only facilitates the placement of the first and second sliders 412, 432 within the guide grooves 11 using the clearance hole, but also ensures that the first and second sliders 412, 432 can slide out of the clearance hole.

[0044] See also Figure 7-9 , 11. In one embodiment, the transmission shaft assembly 45 includes a first transmission shaft 451, a second transmission shaft 452 and a first elastic member 453; the second transmission shaft 452 is provided with a first sliding groove 4521, the center line of the first sliding groove 4521 coincides with the center axis of the second transmission shaft 452, the first elastic member 453 is arranged in the first sliding groove 4521, one end of which is connected to the bottom of the first sliding groove 4521, and the other end is connected to the first transmission shaft 451; the first transmission shaft 451 is partially arranged in the first sliding groove 4521; the second transmission disk 44 is provided with a first through hole 441, and one end of the first transmission shaft 451 extending out of the first sliding groove 4521 passes through the first through hole 441 and is connected to the first transmission disk 42; the second transmission shaft 452 is provided with one end of the first sliding groove 4521 for connecting to the second transmission disk 44; the blocking mechanism 5 is used to limit the second transmission shaft 452. Specifically, the first transmission shaft 451 and the second transmission shaft 452 are coaxially arranged, and the first transmission shaft 451 partially extends into the first sliding groove 4521. The second transmission disc 44 is provided with a first through hole 441, that is, the first transmission disc 42 is disposed between the first sealing disc 1 and the second transmission disc 44 in the vertical direction. The diameter of the first through hole 441 can be greater than or equal to the diameter of the first transmission shaft 451, so that the first transmission shaft 451 can pass through the first through hole 441 and connect with the first transmission disc 42. The first elastic member 453 can be elastic or have other elastic structures, which are not limited in this embodiment.

[0045] During construction, by pressing the transmission shaft assembly 45 downward, that is, pressing the second transmission shaft 452, the second transmission shaft 452 drives the first transmission shaft 451 to move downward through the action of the first elastic member 453, and the first transmission shaft 451 drives the first sealing disk 1 to move downward, thereby driving the first slider 412 to slide in the guide groove 11, so that the first abutment member 413 can drive the elastic sealing member 2 to elastically deform, so that it abuts against the inner wall of the well pipe. When the first abutment member 413 moves into place, the first slider 412 abuts against one end of the guide groove 11, that is, at this time, the first slider 412 cannot continue to slide. Since the first slider 412 cannot continue to slide, the second transmission shaft 452 causes the first elastic member 453 to be compressed in the process of continuing to move downward, thereby ensuring that the second transmission shaft 452 can continue to move downward. The second transmission shaft 452 continues to move downward, driving the second transmission shaft 452 to connect with the second sealing disk 3, and then driving the second slider 432 to slide in the guide groove 11, so that the second abutment 433 abuts against the elastic seal 2, and then driving the elastic seal 2 to undergo elastic deformation, so that the outer ring of the elastic seal 2 can abut against the inner wall of the well pipe.

[0046] In one implementation, the first transmission disc is provided with a first guide hole 421, the inner sidewall of which is inclined relative to the central axis of the first transmission disc. A first guide portion 4511 is provided at the end of the first transmission shaft 451 extending from the first sliding slot 4521. The first guide portion 4511 is configured to abut against the inner sidewall of the first guide hole 421. The first guide portion 4511 may be an inclined section disposed on the first transmission shaft 451, with the smaller end of the inclined section facing the first sealing disc 1. The provision of the first guide hole 421 and the first guide portion 4511 ensures synchronous movement of the first transmission assembly 41.

[0047] In one implementation, the first through-hole 441 includes a flared section and a straight section. The sidewall of the flared section is inclined relative to the central axis of the second transmission disk. A second guide portion 4524 is provided at one end of the second transmission shaft 452, where the first sliding groove 4521 is provided. The second guide portion 4524 is configured to connect with the flared section. Specifically, the diameter of the straight section is equal to or greater than the diameter of the first transmission shaft 451. The second guide portion 4524 may be an inclined section disposed on the second transmission shaft 452, with the smaller end of the inclined section facing the second sealing disk 3. The provision of the flared section and the second guide portion 4524 ensures synchronized movement of the second transmission assembly 43.

[0048] In one embodiment, a plurality of second sliding grooves 4522 are provided on the outer surface of the second transmission shaft 452, and a limiting hole 4523 is provided at the bottom of the second sliding groove 4522 away from the connection end of the second transmission shaft 452 and the second transmission disk 44; a third through hole is provided on the second sealing disk 3 for avoiding the first group of transmission components 41, the second group of transmission components 43 and the transmission shaft component 45; the blocking mechanism 5 includes a sealing cone 51, a plurality of second elastic members 52 and a plurality of limiting columns 53; one end of the sealing cone is connected to the second sealing disk 3, and the other end is provided with a second through hole 511 for the second transmission shaft 452 to pass through, and a accommodating cavity 51 for accommodating the transmission shaft component 45 is also provided in the sealing cone. 2. The accommodating cavity 512 is communicated with the second through hole 511; the inner side wall of the second through hole 511 is provided with a plurality of mounting holes symmetrically arranged with the axis of the second through hole 511 as the symmetry line, the limiting hole 4523, the mounting hole, the second elastic member 52, and the limiting column 53 are arranged in a one-to-one correspondence, the limiting column 53 is partially arranged in the mounting hole, the second elastic member 52 is arranged in the mounting hole, one end of which is connected to the bottom of the mounting hole, and the other end is connected to the limiting column 53, and the end of the limiting column 53 extending out of the mounting hole is located in the second sliding groove 4522; when the elastic seal 2 abuts against the inner side wall of the well pipe, the end of the limiting column 53 extending out of the mounting hole penetrates into the limiting hole 4523, which is used to limit the second transmission shaft 452. The limiting hole 4523, the mounting hole, the second elastic member 52, and the limiting post 53 can be configured separately. During construction, the second transmission shaft 452 moves downward. At this time, the limiting post 53 slides within the second sliding groove 4522. When the second transmission shaft 452 moves into position, the limiting post 53, through the action of the second elastic member 52, extends into the limiting hole 4523, thereby preventing the second transmission shaft 452 from moving further downward or upward. It will be understood that when the limiting post 53 extends into the limiting hole 4523, a portion of the limiting post 53 remains within the mounting hole. In this embodiment, the second elastic member 52 is a spring. In other embodiments, the second elastic member 52 can also have other structures, which are not limited in this embodiment. In one embodiment, to reduce friction between the limiting post 53 and the second sliding groove 4522, the connecting section between the limiting post 53 and the second sliding groove 4522 can be configured as an arc.

[0049] In one embodiment, the blocking mechanism 5 further includes a sealing cover 54. A connecting portion 513 is provided at one end of the sealing cone 51 away from the second sealing disk 3. The sealing cover 54 is threadedly connected to the connecting portion 513 to close the second through hole 511. The connecting portion 513 can be a hollow cylindrical structure coaxially arranged with the second through hole 511, and its outer side surface is provided with an external thread. The inner side surface of the sealing cover 54 is provided with an internal thread, and the sealing cover 54 and the connecting portion 513 are threadedly connected. The provision of the sealing cover 54 can effectively prevent the well pipe sealing device 10 from being smoothly installed in the precipitation well due to the limit column 53 extending into the limit hole 4523 due to accidental contact with the second transmission shaft 452 during transportation.

[0050] Another aspect of the present invention further provides a method for plugging a basement dewatering well, comprising:

[0051] The first gravel layer filling step is as follows: filling gravel materials into the precipitation well to form a first gravel layer 30; after the first gravel layer 30 is filled, compacting the first gravel layer 30 using tools.

[0052] Installation steps of the well pipe sealing device: Place the well pipe sealing device 10 into the well pipe of the precipitation well, press the seal transmission mechanism downward so that the seal transmission mechanism first abuts against the inner ring of the elastic seal 2, and then continue to press the seal transmission mechanism downward to cause the elastic seal 2 to undergo elastic deformation, so that the elastic seal 2 abuts against the inner wall of the well pipe.

[0053] Second gravel layer filling step: filling gravel materials into the precipitation well to form a second gravel layer 40; after the second gravel layer 40 is filled, compacting the second gravel layer 40 using tools.

[0054] Installation steps of the wellhead sealing device: first apply cement mortar at the connection between the wellhead cover 6 and the wellhead, and install the wellhead cover 6 on the wellhead; then install the metal seal 81 into the casing 7, and use the support assembly 82 to limit the metal seal 81 in the casing 7, and then fill the casing 7 with concrete to form a slow-setting soil layer. After the concrete layer 83 is formed, an elastic sealing layer 84 is set on the concrete layer 83, and finally the casing 7 is sealed with a casing sealing cover 85.

[0055] To sum up, the present invention arranges a well pipe sealing device 10 and a wellhead sealing device 20 in the well pipe of the dewatering well. The well pipe sealing device 10 includes a first sealing disk 1, an elastic seal 2, a second sealing disk 3, a sealing transmission mechanism and a blocking mechanism 5. When in use, the elastic seal 2 is elastically deformed by the driving of the sealing transmission mechanism, so that the elastic seal 2 is abutted against the inner wall of the well pipe, thereby realizing segmented sealing inside the dewatering well, reducing the amount of groundwater at the wellhead when the wellhead sealing device 20 seals the wellhead of the dewatering well, thereby reducing the water pressure of the groundwater, making it easier for the wellhead sealing device 20 to seal the wellhead of the dewatering well, and a blocking mechanism 5 is provided. After the sealing transmission mechanism moves into place, it can maintain the abutment of the elastic seal 2 against the inner wall of the well pipe, thereby ensuring the sealing effect of the sealing device. The wellhead sealing device 20 utilizes the wellhead cover plate 6 and support assembly 82 to support the metal seal 81, forming a primary seal at the wellhead. The concrete layer 83 forms a secondary seal within the casing 7. The elastic seal 2 forms a tertiary seal within the casing 7. Finally, the threaded connection between the casing sealing cover 85 and the casing 7 forms a quaternary seal. These prevent groundwater leakage and ensure a sealed well. Therefore, the present invention effectively overcomes the shortcomings of the prior art and possesses high industrial value.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A basement dewatering well blocking system, characterized in that: The plugging system includes: a well pipe sealing device, a wellhead sealing device, a first crushed stone layer, and a second crushed stone layer; the well pipe sealing device is used to seal the well pipe of the dewatering well, and the wellhead sealing device is used to seal the wellhead of the dewatering well; the first crushed stone layer is arranged between the bottom of the dewatering well and the well pipe sealing device, and the second crushed stone layer is arranged between the well pipe sealing device and the wellhead sealing device; The wellhead sealing device of the dewatering well comprises: a wellhead cover plate, a casing and a sealing structure; the wellhead cover plate comprises a groundwater outlet, the casing is fixed to the wellhead cover plate, and the inner hole of the casing is connected to the groundwater outlet; the sealing structure is used to seal the inner hole of the casing; the sealing structure comprises a metal seal, a support assembly, a concrete layer, an elastic sealing layer and a casing sealing cover arranged from bottom to top in the casing; the support assembly is used to fix the metal seal in the casing; the elastic sealing layer is used to fill the gap between the concrete layer and the casing sealing cover; The well pipe sealing device includes: a first sealing disk, an elastic seal, a second sealing disk, a sealing transmission mechanism and a blocking mechanism; the elastic seal is arranged between the first sealing disk and the second sealing disk, and the sealing transmission mechanism is slidably arranged on the first sealing disk, and is used to drive the elastic seal to undergo elastic deformation so that the elastic seal abuts against the inner side wall of the well pipe of the dewatering well to seal the well pipe; the blocking mechanism is arranged on the second sealing disk, and when the elastic seal abuts against the inner side wall of the well pipe, the blocking mechanism is used to limit the sealing transmission mechanism to maintain the abutment between the elastic seal and the inner side wall of the well pipe of the dewatering well; The sealing transmission mechanism includes a plurality of first transmission components, a first transmission disk, a plurality of second transmission components, a second transmission disk and a transmission shaft assembly; a plurality of guide grooves for guiding the movement of the first and second transmission components are provided on the first sealing disk; the guide grooves and the first and second transmission components are arranged in a one-to-one correspondence; the first transmission component and the first transmission disk are rotationally connected, and the second transmission component and the second transmission disk are rotationally connected; the transmission shaft assembly is used to drive the first transmission disk and the second transmission disk to move, and then drive the first and second transmission components to abut against the side of the elastic seal away from the well pipe, and then drive the elastic seal to undergo elastic deformation; the blocking mechanism is used to limit the transmission shaft assembly.

2. The basement dewatering well blocking system according to claim 1, characterized in that: A second step for limiting the position of the metal seal is provided on the inner side wall of the groundwater outlet of the wellhead cover; A plurality of slots are provided on the inner side wall of the sleeve, and the support assembly includes a support rod, a limit nut, a support seat, a plurality of support rods and a plurality of support blocks; the slots, support rods and support blocks are provided in a one-to-one correspondence; The support rod is arranged on the metal seal, one end of the support rod is rotatably connected to the support seat, and the other end is rotatably connected to the support block; a connecting hole for the support rod to pass through is provided in the support seat, and the support block is used to connect with the slot; the limiting nut is threadedly connected to the support rod, and is used to limit the support seat.

3. The basement dewatering well blocking system according to claim 2, characterized in that: The sleeve sealing cover is connected to the sleeve via threads; And / or, a waterproof layer is provided at the connection between the wellhead cover plate and the wellhead of the precipitation well, the connection between the wellhead cover plate and the casing, and the connection between the casing and the casing sealing cover.

4. The basement dewatering well blocking system according to claim 1, characterized in that: The first transmission assembly includes a first connecting rod, a first slider, and a first abutment member; one end of the first connecting rod is rotatably connected to the first transmission plate, and the other end is rotatably connected to the first slider, the first slider is disposed in the guide groove, and the first abutment member is disposed on the first slider; The second transmission assembly includes a second connecting rod, a second slider, and a second abutment member; one end of the second connecting rod is rotatably connected to the second transmission plate, and the other end is rotatably connected to the second slider, the second slider is disposed in the guide groove, and the second abutment member is disposed on the second slider; The first abutting member and the second abutting member are used to abut against the elastic sealing member; when the elastic sealing member abuts against the side wall of the well pipe, a plurality of the first abutting members and a plurality of the second abutting members form a circular ring shape.

5. The basement dewatering well blocking system according to claim 4, characterized in that: The guide groove includes a first sub-guide groove and two second sub-guide grooves; the two second sub-guide grooves are respectively arranged on one of the two side walls opposite to each other of the first sub-guide groove; the first slider and the second slider are respectively provided with two protrusions, and the protrusions are arranged in a one-to-one correspondence with the second sub-guide grooves; And / or, the first sealing disk includes an avoidance hole and a blocking member, the avoidance hole is connected to the plurality of guide grooves, and the blocking member is used to block the avoidance hole.

6. The basement dewatering well blocking system according to claim 1, characterized in that: The transmission shaft assembly includes a first transmission shaft, a second transmission shaft and a first elastic member; The second transmission shaft is provided with a first sliding groove, the center line of the first sliding groove coincides with the center axis of the second transmission shaft, the first elastic member is disposed in the first sliding groove, one end of the first elastic member is connected to the bottom of the first sliding groove, and the other end is connected to the first transmission shaft; the first transmission shaft is partially disposed in the first sliding groove; The second transmission plate is provided with a first through hole, and one end of the first transmission shaft extending out of the first sliding slot passes through the first through hole and is connected to the first transmission plate; the end of the second transmission shaft provided with the first sliding slot is used to connect to the second transmission plate; The blocking mechanism is used to limit the second transmission shaft.

7. The basement dewatering well blocking system according to claim 6, characterized in that: A plurality of second sliding grooves are provided on the outer surface of the second transmission shaft, and a limiting hole is provided at the bottom of the second sliding groove away from the connection end between the second transmission shaft and the second transmission plate; a third through hole is provided on the second sealing plate for avoiding the first group of transmission components, the second group of transmission components and the transmission shaft assembly; The blocking mechanism includes a sealing cone, a plurality of second elastic members and a plurality of limiting columns; one end of the sealing cone is connected to the second sealing disk, and the other end is provided with a second through hole for allowing the second transmission shaft to pass through. The sealing cone is also provided with a accommodating cavity for accommodating the transmission shaft assembly, and the accommodating cavity is connected to the second through hole; the inner side wall of the second through hole is provided with a plurality of mounting holes symmetrically arranged with the second through hole axis as the symmetry line, the limiting hole, the mounting hole, the second elastic member and the limiting column are arranged in a one-to-one correspondence, the limiting column is partially arranged in the mounting hole, the second elastic member is arranged in the mounting hole, one end of which is connected to the bottom of the mounting hole, and the other end is connected to the limiting column, and one end of the limiting column extending out of the mounting hole is located in the second sliding groove; when the elastic seal abuts against the inner side wall of the well pipe, one end of the limiting column extending out of the mounting hole penetrates into the limiting hole to limit the second transmission shaft.

8. The basement dewatering well blocking system according to claim 7, characterized in that: The blocking mechanism further includes a sealing cover. A connecting portion is provided at one end of the sealing cone away from the second sealing disk. The sealing cover is threadedly connected to the connecting portion for closing the second through hole.

9. A method for plugging a basement dewatering well, characterized by: The basement dewatering well sealing system according to any one of claims 1 to 8 further comprises: First gravel layer filling step: filling gravel material into the precipitation well to form a first gravel layer; Installation steps of the well pipe sealing device: Place the well pipe sealing device into the well pipe of the dewatering well, press the seal transmission mechanism downward so that the seal transmission mechanism first contacts the inner ring of the elastic seal, and then continue to press the seal transmission mechanism downward to elastically deform the elastic seal so that the elastic seal contacts the inner wall of the well pipe; Second gravel layer filling step: filling gravel material into the precipitation well to form a second gravel layer; Installation steps of the wellhead sealing device: first apply cement mortar at the connection between the wellhead cover and the wellhead, and install the wellhead cover on the wellhead; then install the metal seal into the casing, and use the support assembly to limit the metal seal in the casing, and then fill the casing with concrete to form a slow-setting soil layer. After the concrete layer is formed, an elastic sealing layer is set on the concrete layer, and finally the casing is sealed with a casing sealing cover.

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