Precipitation well plugging casing

Abstract

The application discloses a dewatering well sealing sleeve, which comprises a dewatering well, a sleeve coaxially arranged on the dewatering well, a containing groove provided on the bottom of the sleeve and used for containing a local part of the end face of the opening of the dewatering well, a sealing member arranged on the bottom of the sleeve and used for sealing the opening of the containing groove, a pouring groove formed by the gap between the inner circumferential wall of the containing groove and the outer circumferential wall of the opening of the dewatering well and the sealing member, a pouring port arranged on the bottom of the sleeve and used for connecting the output end of external pouring equipment and pouring concrete fluid into the pouring groove, a sealing hole penetrating through the sleeve and communicating with the dewatering well, and an opening and closing member arranged on the sleeve and used for sealing or dredging the sealing hole. The application solves the problems that the dewatering well is difficult to pump and drain before sealing, the water pressure of the dewatering well is too high to be discharged from the dewatering well, and the subsequent sealing of the dewatering well is troublesome.

Description

Technical Field

[0001] This invention relates to the field of dewatering well plugging tooling technology, specifically a dewatering well plugging casing. Background Technology

[0002] Currently, ordinary steel sleeves with rings are used for sealing during subsequent construction of dewatering wells, and the sealing is achieved through welding. However, this sealing method is prone to water leakage at the weld points. Furthermore, when the water pressure in the dewatering well is too high or there is too much groundwater, the sleeve may be damaged by the gushing groundwater, leading to sealing failure. In addition, it is difficult to pump and drain groundwater through the sleeve during construction. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a dewatering well plugging casing, which solves the problems in existing technologies such as difficulty in pumping and draining dewatering wells before plugging, excessive water pressure causing water to overflow from the dewatering well, and the cumbersome process of subsequent plugging of dewatering wells.

[0004] To achieve the above objectives, the present invention provides a dewatering well plugging casing, comprising a dewatering well, a casing coaxially disposed on the dewatering well, a circumferential groove at the bottom of the casing for partially accommodating the end face of the opening of the dewatering well, a plugging component at the bottom of the casing for sealing the opening of the groove, the inner peripheral wall of the groove being clearance-fitted with the outer peripheral wall of the opening of the dewatering well and combined with the plugging component to form an injection groove, an injection port at the bottom of the casing for connecting to the output end of an external injection device and injecting concrete fluid into the injection groove, a hollow casing having a sealing hole communicating with the dewatering well, and an opening and closing component on the casing for sealing or unblocking the sealing hole.

[0005] The advantages of adopting the above technical solution are as follows: Construction personnel first install the casing at the opening of the dewatering well, seal the opening of the trough with a sealing component, and then inject concrete fluid into the grouting trough through the injection port. When the concrete fluid solidifies, it combines with the sealing component, the inner circumferential wall of the casing, and the outer circumferential wall of the dewatering well to form a whole, thereby increasing the connection strength between the casing and the dewatering well and improving the sealing performance between them. When it is necessary to open the dewatering well, the operator clears the sealing hole using the opening and closing component, allowing the construction personnel to insert the pipeline into the dewatering well for pumping and drainage, preventing excessive water pressure or groundwater accumulation in the dewatering well from causing gushing or seepage. When it is necessary to seal the dewatering well, the operator seals the sealing hole using the opening and closing component, thus preventing water from seeping or gushing to the outside through the sealing hole. The above technical design facilitates operation by construction personnel, improves construction efficiency, and prevents groundwater seepage. It also facilitates subsequent welding and concrete pouring.

[0006] The invention further comprises: the opening and closing component including a rotating sleeve disposed at the top opening of the sleeve; the outer peripheral wall of the rotating sleeve being threadedly connected to the inner peripheral wall of the top opening of the sleeve; a plurality of mating plates arranged circumferentially on the inner peripheral wall of the bottom of the sleeve; the plurality of mating plates being disposed on the same horizontal plane; adjacent mating plates being fitted with a clearance to form a mating groove; a sealing plate being disposed at the bottom of the rotating sleeve corresponding to each mating groove; the plurality of sealing plates corresponding one-to-one with the plurality of mating grooves; each sealing plate being disposed covering the corresponding mating groove; the radial cross-sectional area of ​​the sealing plate being larger than the radial cross-sectional area of ​​the mating groove; the bottom surfaces of each sealing plate respectively abutting against the top surfaces of their respective adjacent mating plates; and a through hole for communicating with a sealing hole penetrating along its axial direction on the rotating sleeve.

[0007] The advantages of adopting the above technical solution are as follows: When it is necessary to seal the dewatering well and sealing hole, the operator rotates the rotating sleeve so that the sealing plate on the rotating sleeve covers the corresponding mating groove. The sealing hole is sealed by the combination of several sealing plates and several mating plates, preventing water in the dewatering well from seeping into the sealing hole through the mating groove. When the dewatering well and sealing hole are no longer to be sealed, the operator can rotate the rotating sleeve in the opposite direction so that the sealing plate is removed from the mating groove, which facilitates the construction personnel to pump water from the dewatering well and prevent excessive water pressure in the dewatering well and excessive groundwater from causing groundwater seepage or gushing out. The above technology allows the dewatering well to be sealed or opened automatically according to the construction needs during the construction process, improving construction efficiency while also enabling the pumping of groundwater.

[0008] The present invention further comprises: a gap fit between adjacent sealing plates to form a sealing groove, and each sealing groove is provided with a filling plate for filling the sealing groove during subsequent well sealing construction, the filling plate being adapted to the sealing groove.

[0009] The advantages of adopting the above technical solution are: before sealing the well in the later stage of construction, the construction personnel will place the filling plate into the sealing groove. At this time, several filling plates and several sealing plates are combined to form a whole plate, thereby preventing water in the dewatering well from gushing out or seeping out. The sealing performance between the casing and the rotating sleeve is improved by setting up the above technology.

[0010] The present invention further comprises: first toothed grooves arranged along the length of the sealing plate on both sides of the sealing plate, the first toothed grooves being longitudinally opened along the thickness of the sealing plate; second toothed grooves arranged on both sides of each filling plate; and each first toothed groove engaging with its adjacent second toothed groove.

[0011] The advantages of adopting the above technical solution are: when the filling plate is placed in the sealing groove, the second toothed groove on the filling plate will mesh with the adjacent first toothed groove, thereby realizing the snap-fit ​​of the filling plate in the sealing plate. At the same time, the meshing of the first toothed groove and the second toothed groove prevents the filling plate from shaking in the sealing plate, which would cause gaps between the filling plate and the sealing plate, thus preventing water from gushing out of the dewatering well.

[0012] The present invention further comprises: a plurality of abutment rods circumferentially arranged in the through hole, which are inserted into the rotating sleeve before sealing the dewatering well in the later construction; a slot is provided on the inner peripheral wall of the through hole corresponding to the position of each abutment rod for partial accommodation of the end of the abutment rod; the end of the abutment rod is connected to the slot by welding; a plurality of abutment rods are arranged one-to-one with a plurality of filling plates; and the bottom of each abutment rod abuts against the end face of the corresponding filling plate.

[0013] The advantages of adopting the above technical solution are as follows: Before sealing the dewatering well during the later construction phase, the construction personnel will insert several abutment rods into the through holes, engage the abutment rods with the corresponding slots, and ensure that their bottoms abut against the corresponding filling plates. After the abutment rods are installed, the construction personnel will weld the abutment rods using welding technology to make them difficult to detach from the slots. The above technical setup ensures that the filling plates will not detach from the sealing groove, causing groundwater to seep out from the gap between the sealing plates and the mating plates, thereby improving the sealing strength between the sealing plates and the mating plates.

[0014] The present invention further provides that the radial cross section of the abutment rod is adapted to the radial cross section of the slot and both are trapezoidal in shape.

[0015] The advantage of adopting the above technical solution is that the radial cross section of the abutment rod and the radial cross section of the slot are matched and both are trapezoidal, which makes it difficult for the abutment rod to rotate after it is partially inserted into the slot, thus preventing the bottom of the abutment rod from detaching from the corresponding filling plate.

[0016] The present invention further comprises: the through hole and the sealing hole are combined to form a grouting cavity for external concrete fluid to be injected; a sealing cap is threadedly connected to the opening of the through hole; the bottom surface of the sealing cap is an abutting surface for contacting the surface of the injected concrete fluid; and several fitting notches are circumferentially provided at the edge of the abutting surface of the sealing cap for partial accommodation of the concrete fluid.

[0017] The advantages of adopting the above technical solution are as follows: In the above technology, the combination of the through hole and the sealing hole forms a grouting cavity. When sealing the dewatering well later, the construction personnel can pour concrete fluid into the grouting cavity until the concrete fluid overflows to the opening of the through hole. Then, the operator screws in the sealing cap, so that the contact surface of the sealing cap abuts against the surface of the concrete fluid. At this time, some of the concrete fluid will enter the mating notch. When the concrete fluid solidifies and forms a concrete block, it will connect the sealing cap, the sleeve, and the rotating sleeve, so that the three are connected to form a whole, thereby improving the connection strength between the three. At the same time, the formation of the concrete block can also prevent groundwater from gushing out of the dewatering well, that is, improve the sealing strength at the through hole and the sealing hole, thereby improving the seepage prevention function of the dewatering well. The setting of the mating notch in the above technology ensures that some of the concrete fluid will be in the mating notch after solidification, thereby improving the connection strength between the sealing cap and the concrete block, and preventing the sealing cap from rotating.

[0018] The present invention further comprises: the sealing component including a collar sleeved on the dewatering well, the top wall of the collar having a protruding insert ring, the insert ring being partially inserted into the receiving groove, the thickness of the insert ring being adapted to the radial cross-sectional width of the receiving groove, and a plurality of connecting bolts for threaded connection with the insert ring being arranged circumferentially on the outer peripheral wall of the bottom of the casing.

[0019] The advantages of adopting the above technical solution are as follows: When it is necessary to seal the trough, the operator lifts the collar and inserts the insert ring on the collar into the trough using equipment such as stamping or lifting. This ensures that the insert ring and the trough are properly engaged, and the outer circumferential wall of the insert ring fits tightly against the inner circumferential wall of the trough, thereby improving the sealing strength between the insert ring and the trough. In the above technology, the insert ring and the trough together form a grouting groove for external concrete fluid to be poured in. After the insert ring is inserted, the operator connects the insert ring and the casing using connecting bolts, thereby preventing the insert ring from detaching from the trough. Then, the construction personnel pour in concrete fluid through the grouting port. When the concrete fluid solidifies, the concrete block formed will connect the insert ring and the inner circumferential wall of the casing, thereby improving the sealing strength and connection strength between the casing and the dewatering well, and preventing groundwater from seeping out of the dewatering well.

[0020] The invention further comprises: a welding plate bent on the outer peripheral wall of the collar for attaching to the outer peripheral wall of the bottom of the sleeve; a plurality of snap-fit ​​notches arranged circumferentially on the outer peripheral wall of the bottom of the sleeve; a deformation mark provided on the welding plate corresponding to each snap-fit ​​notch for external construction personnel to strike and deform the welding plate locally and insert it into the corresponding snap-fit ​​notch; the inner peripheral wall of the welding plate is fitted to the inner wall of each snap-fit ​​notch; the welding plate and the sleeve are connected by welding process; and the radial cross section of the snap-fit ​​notch is triangular.

[0021] The advantages of adopting the above technical solution are as follows: During subsequent sealing construction of the dewatering well, operators can use external hammers or punching equipment to press or strike the deformation marks, causing each deformation mark of the welding plate to be deformed under pressure and locked into the corresponding locking notch. The locking notch prevents axial rotation of the collar, improves the connection strength and sealing performance between the welding plate and the casing. After hammering the locking notch into the deformation marks of the welding plate, operators can use external welding equipment to weld the welding plate and the casing, achieving a tight fit between the casing and the welding plate, thereby connecting the collar and the casing, improving the sealing performance between the collar and the casing, and preventing water from seeping from the collar into the outside of the dewatering well. In the above technology, the radial cross-section of the locking notch is triangular, further improving the connection strength between the welding plate and the casing and preventing axial rotation of the collar. Attached Figure Description

[0022] Figure 1 This is a three-dimensional view of the present invention;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a three-dimensional view of the top of the rotating sleeve in this invention;

[0025] Figure 4 This is a three-dimensional view from the bottom of the assembly of the rotating sleeve and the mating plate in this invention. Detailed Implementation

[0026] This invention provides a sealing casing 2 for a dewatering well 1, comprising a dewatering well 1, a casing 2 coaxially mounted on the dewatering well 1, a circumferential groove 21 at the bottom of the casing 2 for partially accommodating the end face of the opening of the dewatering well 1, a sealing element at the bottom of the casing 2 for sealing the opening of the groove 21, the inner circumferential wall of the groove 21 being clearance-fitted with the outer circumferential wall of the opening of the dewatering well 1 and combined with the sealing element to form an injection groove 22, an injection port 23 at the bottom of the casing 2 for connecting to the output end of an external injection device and injecting concrete fluid into the injection groove 22, a hollow sealing hole 24 penetrating the casing 2 and communicating with the dewatering well 1, and an opening and closing element for sealing or unblocking the sealing hole 24 on the casing 2, the opening and closing element including an opening at the top of the casing 2. The rotating sleeve 3 at the opening is threaded to the inner wall of the top opening of the sleeve 2. Several mating plates 25 are arranged circumferentially on the inner wall of the bottom of the sleeve 2, all on the same horizontal plane. Adjacent mating plates 25 are fitted with a clearance to form a mating groove 251. A sealing plate 31 is provided at the bottom of the rotating sleeve 3 corresponding to each mating groove 251. Each sealing plate 31 corresponds one-to-one with a mating groove 251, and each sealing plate 31 covers the corresponding mating groove 251. The radial cross-sectional area of ​​the sealing plate 31 is larger than that of the mating groove 251. The bottom surfaces of each sealing plate 31 abut against the top surfaces of their respective adjacent mating plates 25. The upper edge of the rotating sleeve 3... The axial direction of the sealing plate 31 is through a through hole 32 for communicating with the sealing hole 24. Adjacent sealing plates 31 are fitted with a clearance to form a sealing groove 311. Each sealing groove 311 is provided with a filling plate 33 for filling the sealing groove 311 during later well sealing operations. The filling plate 33 is adapted to the sealing groove 311. First toothed grooves 312 are arranged along the length of the sealing plate 31 on both side walls of the sealing plate 31. The first toothed grooves 312 are longitudinally opened along the thickness direction of the sealing plate 31. Second toothed grooves 331 are arranged on both side walls of each filling plate 33. Each first toothed groove 312 engages with its adjacent second toothed groove 331. The through hole 32 is circumferentially provided with several filling plates for later well sealing operations. A retaining rod 4 is inserted into the rotating sleeve 3 before sealing the dewatering well 1. A slot 41 is provided on the inner circumferential wall of the through hole 32 for each retaining rod 4, corresponding to the position of the retaining rod 4. The end of the retaining rod 4 is connected to the slot 41 by welding. Several retaining rods 4 are correspondingly arranged with several filling plates 33. The bottom of each retaining rod 4 abuts against the end face of the corresponding filling plate 33. The radial cross-section of the retaining rod 4 matches the radial cross-section of the slot 41 and is trapezoidal. The through hole 32 and the sealing hole 24 combine to form a grouting cavity 5 for injecting external concrete fluid. A sealing cap 51 is threadedly connected to the opening of the through hole 32. The bottom surface of the sealing cap 51 is an abutting surface 511 for contacting the surface of the injected concrete fluid.The sealing cap 51 has several circumferentially circumferentially formed notches 52 at the edge of its contact surface 511 for partially accommodating concrete fluid. The sealing component includes a collar 6 fitted onto the dewatering well 1. The top wall of the collar 6 has a protruding insert ring 61, which is partially inserted into the receiving groove 21. The thickness of the insert ring 61 is adapted to the radial cross-sectional width of the receiving groove 21. Several connecting bolts 62 for threaded connection with the insert ring 61 are circumferentially arranged on the outer peripheral wall of the bottom of the sleeve 2. The outer peripheral wall of the collar 6 has bends for attaching... A welding plate 63 is mounted on the outer peripheral wall of the bottom of the sleeve 2. Several snap-fit ​​notches 26 are arranged circumferentially on the outer peripheral wall of the bottom of the sleeve 2. A deformation mark 64 is provided on the welding plate 63 corresponding to each snap-fit ​​notch 26, allowing external construction personnel to tap and deform the welding plate 63 to insert it into the corresponding snap-fit ​​notch 26. The inner peripheral wall of the welding plate 63 is fitted to the inner wall of each snap-fit ​​notch 26. The welding plate 63 is connected to the sleeve 2 via a welding process. The radial cross-section of each snap-fit ​​notch 26 is triangular.

[0027] The concrete block formed by pouring in the grouting tank described above is identified as 7 in the accompanying drawings.

[0028] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. 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 illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A dewatering well blanking casing comprising a dewatering well, characterized by: The precipitation well is coaxially provided with a sleeve, a containing groove for partially containing an end face of an opening of the precipitation well is formed at a bottom of the sleeve in a ring shape, a plugging member for plugging an opening of the containing groove is arranged at the bottom of the sleeve, an inner circumferential wall of the containing groove is gap-fitted with an outer circumferential wall of the opening of the precipitation well and combined with the plugging member to form a pouring groove, a pouring port for connecting an output end of an external pouring device and pouring concrete fluid into the pouring groove is arranged at the bottom of the sleeve, a sealing hole communicated with the precipitation well is formed through the sleeve in a hollow manner, an opening and closing member for plugging or dredging the sealing hole is arranged on the sleeve, the opening and closing member comprises a rotating sleeve arranged at an opening of a top of the sleeve, an outer circumferential wall of the rotating sleeve is threadedly connected with an inner circumferential wall of the opening of the top of the sleeve, a plurality of fitting plates are arranged on an inner circumferential wall of the bottom of the sleeve in a ring shape, the fitting plates are arranged on the same horizontal plane, the fitting plates are gap-fitted with each other to form fitting grooves, a sealing plate is arranged at the bottom of the rotating sleeve corresponding to each fitting groove, the sealing plates are one-to-one corresponding to the fitting grooves and each sealing plate is arranged on the corresponding fitting groove in a covering manner, a radial cross-sectional area of the sealing plate is larger than that of the fitting groove, the bottom surface of each sealing plate is respectively abutted on the top surface of each adjacent fitting plate, a through hole for communicating with the sealing hole is formed through the rotating sleeve along an axial direction of the rotating sleeve, the sealing grooves are formed between the adjacent sealing plates in a gap-fitted manner, a filling plate for filling the sealing groove in a later construction is arranged in each sealing groove, the filling plate is arranged in a matched manner with the sealing groove, a plurality of abutting rods are arranged in the through hole in a ring shape and are arranged in the rotating sleeve in a later construction for plugging the precipitation well, a clamping groove for partially containing an end portion of the abutting rod is formed at the inner circumferential wall of the through hole corresponding to each abutting rod, the end portion of the abutting rod is connected with the clamping groove through a welding process, the abutting rods are one-to-one corresponding to the filling plates, and the bottom of each abutting rod is abutted on the end surface of the corresponding filling plate.

2. A dewatering well blanking casing according to claim 1, characterised in that: First tooth grooves are arranged on both side walls of the sealing plate along a length direction of the sealing plate, the first tooth grooves are longitudinally formed along a thickness direction of the sealing plate, second tooth grooves are arranged on both side walls of each filling plate, and each first tooth groove is arranged in a meshing manner with each adjacent second tooth groove.

3. A dewatering well blanking casing according to claim 1, characterized in that: The radial cross-section of the abutting rod is matched with the radial cross-section of the clamping groove and is arranged in a trapezoidal shape.

4. The precipitation well packer of claim 1, wherein: The through hole and the sealing hole form a pouring cavity for pouring the concrete fluid from the outside, a sealing cover is threadedly connected at an opening of the through hole, an abutting surface of the bottom surface of the sealing cover is used for abutting with a surface of the poured concrete fluid, and a plurality of matching notches for partially containing the concrete fluid are formed at the edge of the abutting surface of the sealing cover in a ring shape.

5. The precipitation well packer of claim 1, wherein: The plugging member comprises a sleeve ring sleeved on the precipitation well, a top wall of the sleeve ring is protruded with a plug ring, the plug ring is partially inserted and fitted with the containing groove, a thickness of the plug ring is matched with a radial cross-sectional width of the containing groove, and a plurality of connecting bolts for threadedly connecting with the plug ring are arranged on the outer circumferential wall of the bottom of the sleeve in a ring shape.

6. A dewatering well blanking casing according to claim 5, characterised in that: The outer peripheral wall of the sleeve ring is bent to have a welding plate for being attached to the outer peripheral wall of the sleeve bottom, the outer peripheral wall of the sleeve bottom is circumferentially arranged with a plurality of clamping notches, the welding plate is provided with a deformation mark corresponding to each clamping notch position for allowing external construction personnel to knock to make the welding plate locally deform and be placed into the corresponding clamping notch, the inner peripheral wall of the welding plate is attached to the inner wall of each clamping notch, and the welding plate and the sleeve are connected by welding process.

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