A precipitation well construction device and construction method

Abstract

The application relates to the technical field of ecological restoration engineering dewatering, and discloses a dewatering well construction device and a construction method, which solve the problem that uneven filter material filling causes poor filtering effect in the related dewatering well construction process, the filter material being directly manually shovelled into a well hole, the problem being solved by the device, which comprises a well hole for installing a well pipe, a limiting cylinder for limiting the well pipe being installed in the well hole, the diameter of the limiting cylinder being not less than the diameter of the well pipe, a material paving mechanism for filling filter material between the limiting cylinder and the well hole being installed above the well hole, the material paving mechanism comprising a rotating plate capable of rotating horizontally and a hopper installed at the edge of the rotating plate, and the discharge port of the hopper being directed to the gap between the limiting cylinder and the well hole, so as to reduce the case that uneven filter material filling causes poor filtering effect. The dewatering well construction device and the construction method are applied to environmental governance and environmental restoration project engineering construction, and have the advantage of improving the filtering effect of the dewatering well.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ecological restoration engineering dewatering, and in particular to a dewatering well construction device and a construction method. BACKGROUND

[0002] In the construction process of ecological restoration engineering, a foundation pit needs to be dug, and during the foundation pit excavation operation, the groundwater level needs to be controlled in advance by using a pipe well dewatering method, so as to reduce the situation that the collapse of the foundation pit is caused by groundwater; the pipe well dewatering refers to a dewatering method in which a dewatering pipe well is arranged around the foundation pit, a water pump is installed in the dewatering pipe well, and the groundwater is continuously pumped out, so that the groundwater level in the foundation pit is always lower than the operation surface of the foundation pit.

[0003] At present, the related dewatering well construction process is as follows: measurement and line laying, determination of pipe well position, drilling machine positioning, impact well forming, hoisting and placing well pipe, backfilling filter material around the well pipe, well washing, installation of submersible pump and water outlet pipe. When performing the dewatering work, the submersible pump and the water outlet pipe can pump out the groundwater in the well pipe, and the filter material filters the silt in the well hole, so as to reduce the loss of silt when the groundwater is pumped out.

[0004] The related technology in the above has the following disadvantages: in the related dewatering well construction process, the filter material is usually manually directly shovelled into the well hole, and the problem of poor filtering effect caused by uneven filling of the filter material is prone to occur. SUMMARY

[0005] In order to realize uniform filling of the filter material and improve the filtering effect, the present application provides a dewatering well construction device.

[0006] In a first aspect, the dewatering well construction device provided by the present application adopts the following technical scheme:

[0007] A dewatering well construction device, comprising a well hole for installing a well pipe, a limiting cylinder for limiting the well pipe is installed in the well hole, the diameter of the limiting cylinder is not less than the diameter of the well pipe, a material laying mechanism for filling filter material between the limiting cylinder and the well hole is installed above the well hole, the material laying mechanism comprises a rotating plate that can rotate horizontally and a hopper installed at the edge of the rotating plate, and the discharge port of the hopper faces the gap between the limiting cylinder and the well hole.

[0008] By adopting the technical scheme, the limiting cylinder can position the installation position of the well pipe, ensure that the well pipe can be installed at the center of the well hole, and block the filter material, thereby reducing the situation that the fine filter material is blocked in the well pipe together with the silt, and ensuring that the work of adding the filter material into the well hole and the work of placing the well pipe can be simultaneously performed, thereby improving the construction efficiency of the dewatering well construction.

[0009] Optionally, a driving mechanism for horizontally rotating the rotating plate is arranged above the material laying mechanism, the driving mechanism comprises a transmission assembly and a driving motor, the transmission assembly comprises a first bevel gear and a second bevel gear meshing with the first bevel gear, the shaft center of the first bevel gear is fixedly connected with the output end of the driving motor, and the second bevel gear is coaxially fixed with the rotating plate.

[0010] By adopting the technical scheme, when the driving motor drives the first bevel gear to rotate, the second bevel gear meshing with the first bevel gear rotates, thereby driving the rotating plate coaxially fixed with the second bevel gear to horizontally rotate, at this time, the hopper installed at the edge of the rotating plate performs circular motion, and the gap between the limiting cylinder and the well hole is uniformly filled with the filter material.

[0011] Optionally, a net winding mechanism is further arranged above the driving mechanism, the net winding mechanism comprises a rotating roller located outside the well pipe, the shaft center of the rotating roller is parallel to the shaft center of the well pipe, a nylon net is wound on the rotating roller, one end of the nylon net away from the rotating roller is fixed to the outer sidewall of the well pipe, the transmission assembly further comprises a third bevel gear meshing with the first bevel gear, the third bevel gear is located above the second bevel gear, and the rotating roller is installed on the side of the third bevel gear away from the first bevel gear.

[0012] By adopting the technical scheme, when the driving motor drives the transmission assembly to rotate, the third bevel gear horizontally rotates, and the rotating roller installed on the third bevel gear performs circular motion, thereby realizing that when the well pipe is placed into the well hole, the nylon net on the rotating roller can be wound on the outer sidewall of the well pipe, and the effect of filtering the silt by the well pipe is enhanced.

[0013] Optionally, a fixing assembly is further connected to the transmission assembly, the fixing assembly comprises a pay-off roller coaxially fixed with the first bevel gear, the shaft center of the pay-off roller is parallel to the well pipe, a pay-off rope is wound on the pay-off roller, and one end of the pay-off rope away from the pay-off roller is fixed to the end of the well pipe close to the bottom wall of the well hole.

[0014] By adopting the technical scheme, when the well pipe is installed in the well hole, the gravity of the well pipe is used to pull the pay-off rope along the length direction of the well pipe, to drive the first bevel gear coaxially fixed with the pay-off roller to rotate, thereby driving the rotation of the rotating plate, to realize uniform feeding of the hopper, and the pay-off rope can fix the nylon net wound outside the well pipe, to improve the connection effect between the well pipe and the nylon net, thereby improving the filtering effect.

[0015] Optionally, a plurality of magnetic sheets are fixed on the pay-off rope, the plurality of magnetic sheets are fixed along the length direction of the pay-off rope, the well pipe is made of metal material, and the magnetic sheets abut against the well pipe.

[0016] By adopting the technical scheme, the magnetic sheets on the pay-off rope are attracted and fixed to the well pipe, to further enhance the fixing effect of the pay-off rope on the nylon net, so that the nylon net can better abut against the outer sidewall of the well pipe, and the nylon net is less likely to be loose or even fall off.

[0017] Optionally, a plurality of limiting rods are fixed on one end of the limiting cylinder close to the bottom wall of the well hole, the plurality of limiting rods are fixed along the circumferential surface of the limiting cylinder, and the length of the limiting rod is equal to the distance between the outer sidewall of the limiting cylinder and the inner sidewall of the well hole.

[0018] By adopting the technical scheme, the limiting rods can ensure that the placement position of the limiting cylinder is in the center of the well hole, and after the well pipe is placed inside the limiting cylinder, the thickness of the filter material around the well pipe can be basically the same, to improve the filtering effect on the underground water entering the well pipe.

[0019] Optionally, the device further comprises a limiting mechanism, the limiting mechanism is located above the net winding mechanism, the limiting mechanism comprises two supporting supports, the two supporting supports are symmetrically arranged about the axis of the well pipe, and the supporting supports are attached to the outer wall of the well pipe.

[0020] By adopting the technical scheme, since the length of the well pipe is relatively long, the supporting supports are arranged to limit the well pipe when the well pipe is vertically inserted into the limiting cylinder.

[0021] In the second aspect, the construction method of the construction device of the dewatering well adopts the following technical scheme.

[0022] The construction method of the construction device of the dewatering well comprises the following steps.

[0023] S1, excavating a well hole from the ground;

[0024] S2, first insert the limiting cylinder into the well hole, then place the construction device above the well hole, then hoist the well pipe between the two support supports, fix the nylon net on the rotating roller to the side wall of the well pipe close to the well hole, fix the pay-off rope to the end of the well pipe close to the bottom wall of the well hole and pull it tight, then insert the well pipe into the limiting cylinder;

[0025] S3, while inserting the well pipe, the operator adds filter material into the hopper, so that the filter material fills between the limiting cylinder and the well hole;

[0026] S4, after the well pipe is installed, the construction device arranged above the well hole is removed, then the submersible pump and the water outlet pipe are installed into the well pipe, and the dewatering well construction is completed.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The limiting cylinder can position the installation position of the well pipe, ensure that the well pipe can be installed at the center of the well hole, and the limiting cylinder can block the filter material, reduce the blockage of the well pipe by fine filter material with silt, and ensure that the work of adding filter material into the well hole and the work of placing the well pipe can be carried out at the same time, improve the construction efficiency of the dewatering well construction; when the material laying mechanism discharges, the worker first puts the filter material into the hopper, and when the hopper rotates with the rotating plate, the filter material in the hopper falls uniformly into the pores between the well hole and the limiting cylinder, reducing the poor filtering effect caused by uneven filling of the filter material;

[0029] 2. When the driving motor drives the transmission assembly to rotate, the third bevel gear rotates horizontally, so that the rotating roller mounted on the third bevel gear moves in a circular motion, so that when the well pipe is placed into the well hole, the nylon net on the rotating roller can be wound on the outer side wall of the well pipe, enhancing the effect of filtering silt by the well pipe;

[0030] 3. When the well pipe is installed into the well hole, the pay-off rope is pulled along the length direction of the well pipe by the gravity of the descending well pipe, driving the first bevel gear coaxially fixed with the pay-off roller to rotate, thereby driving the rotation of the rotating plate, realizing uniform discharging of the hopper, and the pay-off rope can fix the nylon net wound on the outer side of the well pipe, improving the connection effect between the well pipe and the nylon net, thereby improving the filtering effect.

[0031] 4. The dewatering well construction device and construction method of the present application are applied to environmental governance and environmental remediation project construction, having the advantages of uniform filling of filter material and improved filtering effect of dewatering well. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a cross-sectional view of the material laying mechanism and the well hole.

[0033] Figure 2 is a cross-sectional view of the material laying mechanism in Figure 1A local enlarged view at C.

[0034] Figure 3 is a structure diagram of the driving mechanism in Figure 1 A local enlarged view at D.

[0035] Figure 4 is a structure diagram of the well pipe and the fixing assembly.

[0036] Reference signs: 1, well pipe; 11, clamping groove; 2, well hole; 3, limiting cylinder; 31, limiting rod; 4, frame body; 41, base; 411, ring groove; 42, supporting rod; 421, rotating ring; 5, material paving mechanism; 51, rotating plate; 511, limiting ring; 52, hopper; 521, discharging pipe; 6, driving mechanism; 61, driving motor; 62, transmission assembly; 621, first bevel gear; 622, second bevel gear; 6221, connecting pipe; 623, third bevel gear; 6231, rotating groove; 63, fixing assembly; 631, pay-off roller; 632, pay-off rope; 6321, magnetic sheet; 7, net winding mechanism; 71, fixing shaft; 72, rotating roller; 73, nylon net; 8, limiting mechanism; 81, supporting bracket; 82, connecting rod. DETAILED DESCRIPTION

[0037] The following description will be made in conjunction with the accompanying drawings. Figures 1-4 The application is further described in detail.

[0038] The embodiment of the application discloses a dewatering well construction device.

[0039] Reference Figure 1 A dewatering well construction device comprises a well hole 2 for installing a well pipe 1, a limiting cylinder 3 is vertically installed at the center of the well hole 2, a frame body 4 is installed above the well hole 2, a material paving mechanism 5 is installed on the frame body 4, the material paving mechanism 5 is located on one side close to the well hole 2, and a driving mechanism 6 for driving the material paving mechanism 5 to rotate is connected to the material paving mechanism 5. When construction is performed, the limiting cylinder 3 is placed in the well hole 2, the diameter of the limiting cylinder 3 is smaller than that of the well hole 2 and larger than that of the well pipe 1, the inner side of the limiting cylinder 3 is used for installing the well pipe 1 and limiting the installation of the well pipe 1, and the space between the limiting cylinder 3 and the well hole 2 is used for filling filter material, so that the installation of the well pipe 1 and the paving of the filter material can be simultaneously performed, the construction efficiency is improved, the material paving mechanism 5 can be horizontally rotated under the driving of the driving mechanism 6, the filter material entering the well hole 2 can be uniformly discharged, the uniform filling of the filter material can further enhance the filtering effect of the filter material on underground silt, and the situation that underground silt is extracted along with underground water is reduced.

[0040] The limiting cylinder 3 is a cylinder made of non-metallic material, and the side wall of the limiting cylinder 3 is provided with apertures to ensure that underground water can pass through the side wall of the limiting cylinder 3, but the filter material is blocked between the limiting cylinder 3 and the well hole 2. Four limiting rods 31 with the same length are fixed to the side wall of the end of the limiting cylinder 3 close to the bottom wall of the well hole 2, the four limiting rods 31 are perpendicular to the axis of the limiting cylinder 3, and the ends of the limiting rods 31 away from the limiting cylinder 3 abut against the side wall of the well hole 2. When the limiting cylinder 3 is installed into the well hole 2, the limiting rods 31 abut against the side wall of the well hole 2, so that the limiting cylinder 3 can be installed at the center of the well hole 2.

[0041] With reference to Figure 1 and Figure 2 , the laying mechanism 5 comprises a rotating plate 51 in the shape of a circular ring, the well pipe 1 can pass through the center of the rotating plate 51 vertically, a hopper 52 is fixed to the upper surface of the rotating plate 51, the hopper 52 is located at one side close to the edge of the rotating plate 51, a discharging pipe 521 is fixed through the center of the hopper 52, the discharging pipe 521 penetrates through the rotating plate 51, and the discharging port of the discharging pipe 521 faces the gap between the limiting cylinder 3 and the well hole 2, when the hopper 52 rotates with the rotating plate 51, the filter material in the hopper 52 can be uniformly laid in the gap between the limiting cylinder 3 and the well hole 2.

[0042] The lower surface of the rotating plate 51 is rotationally connected with the frame body 4, a limiting ring 511 is fixed to the edge of the lower surface of the rotating plate 51, the frame body 4 comprises a base 41 horizontally placed on the ground outside the well hole 2, an annular groove 411 is formed in the upper surface of the base 41, the limiting ring 511 is inserted into the annular groove 411, and the limiting ring 511 can rotate horizontally in the annular groove 411, thereby improving the stability of the rotating plate 51 when rotating.

[0043] With reference to Figure 1 and Figure 3 , the driving mechanism 6 can drive the horizontal rotation of the rotating plate 51, the driving mechanism 6 comprises a driving motor 61 fixed to the frame body 4 and a transmission assembly 62, the transmission assembly 62 comprises two first bevel gears 621, the axes of the two first bevel gears 621 are located on the same straight line, the axis of each first bevel gear 621 is fixedly connected with the output end of the driving motor 61, the two first bevel gears 621 are symmetrically arranged about the well pipe 1, and the axes of the first bevel gears 621 are perpendicular to the axis of the well pipe 1, the driving motor 61 is located on the side of the first bevel gears 621 away from the well pipe 1.

[0044] The transmission assembly 62 further comprises a second bevel gear 622 coaxial with the shaft of the well pipe 1, the center of the second bevel gear 622 being vertically through the well pipe 1, the second bevel gear 622 engaging the lower side of the two first bevel gears 621, the two first bevel gears 621 being symmetrically arranged about the second bevel gear 622, when the two driving motors 61 simultaneously drive the two first bevel gears 621 to rotate in opposite directions, the second bevel gear 622 rotates.

[0045] The lower surface of the second bevel gear 622 is coaxially fixed with a connecting pipe 6221, the inner side of the connecting pipe 6221 being vertically inserted into the well pipe 1, the end of the connecting pipe 6221 away from the second bevel gear 622 being fixedly connected with the rotating plate 51, when the second bevel gear 622 rotates, the rotating plate 51 rotates horizontally.

[0046] The transmission assembly 62 further comprises a third bevel gear 623 engaging the upper side of the two first bevel gears 621, the shaft of the third bevel gear 623 being coaxial with the shaft of the second bevel gear 622, the center of the third bevel gear 623 being vertically through the well pipe 1, when the two first bevel gears 621 rotate in opposite directions, the third bevel gear 623 rotates.

[0047] Referring to Figure 1 and Figure 3 , the third bevel gear 623 is rotatably connected with the frame 4, the frame 4 is fixedly provided with two support rods 42, the two support rods 42 horizontally extend towards the side close to the circumferential surface of the third bevel gear 623, the side of the support rod 42 close to the third bevel gear 623 is fixedly provided with a rotating ring 421, the circumferential surface of the third bevel gear 623 is provided with a rotating groove 6231 for the sliding of the rotating ring 421, the rotating ring 421 is inserted into the rotating groove 6231, and the rotating ring 421 is rotatably connected with the rotating groove 6231, so as to ensure that the third bevel gear 623 can stably rotate.

[0048] The upper side of the transmission assembly 62 is further provided with a net winding mechanism 7, the net winding mechanism 7 comprising two fixed shafts 71, the shafts of the two fixed shafts 71 being parallel to the shaft of the well pipe 1, the fixed shafts 71 being fixed to the upper surface of the third bevel gear 623, and the two fixed shafts 71 being symmetrically arranged about the shaft of the third bevel gear 623. Each fixed shaft 71 is coaxially provided with a rotating roller 72, the fixed shaft 71 being rotatably connected with the rotating roller 72, the rotating roller 72 being wound with a nylon net 73, the end of the nylon net 73 away from the rotating roller 72 being fixedly connected with the side wall of the well pipe 1 close to the well hole 2; when being vertically inserted into the well pipe 1, the third bevel gear 623 rotates under the action of the transmission assembly 62, so that the two rotating rollers 72 make circumferential motion on the outer side of the well pipe 1, and the nylon net 73 on the rotating roller 72 is wound to the outer side of the well pipe 1, thereby realizing the net winding work of the well pipe 1.

[0049] Since the well pipe 1 is usually required to be wound with nylon net 73 on the outer wall of the well pipe 1 before being installed into the well hole 2 to increase the filtering effect on the silt, the setting of the net winding mechanism 7 can save manpower for winding; the driving mechanism 6 drives the paving mechanism 5 to rotate, and at the same time, drives the net winding mechanism 7 to rotate, so as to realize the effect of winding the nylon net 73 on the well pipe 1 to be installed.

[0050] The driving assembly 62 is further connected with a fixing assembly 63, the fixing assembly 63 comprises two pay-off rollers 631, each first bevel gear 621 is coaxially fixed with a pay-off roller 631 at the end away from the driving motor 61, the distance between the two pay-off rollers 631 can vertically pass the well pipe 1 wrapped with the nylon net 73, the pay-off rollers 631 are each wound with a pay-off rope 632, and the pay-off ropes 632 on the two pay-off rollers 631 are reversely wound.

[0051] Referring to Figure 1 and Figure 4 , the ends of the pay-off ropes 632 away from the pay-off rollers 631 are each wound around the lower end of the well pipe 1, and the ends of the two pay-off ropes 632 are fixedly connected, the end of the well pipe 1 close to the well hole 2 is provided with a clamping groove 11, and the pay-off rope 632 can be clamped in the clamping groove 11, so as to reduce the situation that the pay-off rope 632 is separated from the well pipe 1 in the process of descending the well pipe 1.

[0052] When the pay-off rope 632 is pulled out by the descending well pipe 1, since the pay-off rope 632 reversely wound drives the two pay-off rollers 631 to rotate in opposite directions, and drives the two first bevel gears 621 to reversely rotate, so as to provide a power source for the rotation of the driving assembly 62.

[0053] Referring to Figure 4 , the pay-off rope 632 is further fixed with a plurality of magnetic sheets 6321, the plurality of magnetic sheets 6321 are fixed along the length direction of the pay-off rope 632, in the process of descending the well pipe 1, the pay-off rope 632 is pulled out from the pay-off roller 631, the well pipe 1 is an iron metal pipe, and the well pipe 1 is provided with a plurality of filtering holes, the magnetic sheets 6321 on the pay-off rope 632 can be automatically attracted to the outer wall of the well pipe 1, so as to further realize the effect of fixing the nylon net 73 wound on the well pipe 1.

[0054] Referring to Figure 1 , the end of the frame body 4 away from the well hole 2 is further provided with a limiting mechanism 8, the limiting mechanism 8 comprises two supporting brackets 81 and a connecting rod 82, the two supporting brackets 81 are symmetrically arranged about the well pipe 1, the supporting bracket 81 abuts against the outer wall of the well pipe 1, the connecting rod 82 is fixed on the side of the supporting bracket 81 away from the well pipe 1, and the end of the connecting rod 82 away from the supporting bracket 81 is fixedly connected with the frame body 4. Since the length of the well pipe 1 is relatively long, in the process of installing the well pipe 1, the limiting mechanism 8 can limit the frame body 4, so that the well pipe 1 can be accurately installed in the limiting cylinder 3.

[0055] The implementation principle of the precipitation well construction device in the embodiment of the present application is as follows:

[0056] After the well hole 2 is excavated, the limiting cylinder 3 is first installed in the well hole 2, and then the uniform laying of filter material and the installation of the well pipe 1 are simultaneously performed. The limiting cylinder 3 provides a positioning function for the installation of the well pipe 1, and protects the well pipe 1 from being damaged due to extrusion of the filter material. When the well pipe 1 is installed, the well pipe 1 is vertically inserted between the two support supports 81, and then the nylon net 73 close to the one end of the well pipe 1 is fixed, so that the pay-off rope 632 is clamped in the clamping groove 11. In the process of downward insertion into the well pipe 1, the pay-off rope 632 is gradually pulled out of the pay-off roller 631, and drives the rotation of the pay-off roller 631, thereby providing power for the transmission of the transmission assembly 62. In addition, the driving motor 61 can also provide power for the transmission of the transmission assembly 62, so as to ensure the normal transmission of the transmission assembly 62, realize the horizontal rotation of the rotating plate 51, and also complete the net winding work of the well pipe 1. When the rotating plate 51 rotates horizontally, the hopper 52 performs a circular motion around the pore between the limiting cylinder 3 and the well hole 2. The construction worker can put the filter material into the hopper 52, so that the hopper 52 uniformly fills the filter material when rotating with the rotating plate 51, thereby improving the filling effect of the filter material, and further improving the filtering effect of the silt.

[0057] The embodiment of the present application discloses a construction method of a precipitation well construction device, comprising the following steps:

[0058] S1, excavating a well hole 2 downward from the ground;

[0059] S2, first inserting a limiting cylinder 3 into the well hole 2, then placing the construction device above the well hole 2, and then hoisting a well pipe 1 to be inserted between the two support supports 81, fixing the nylon net 73 on the rotating roller 72 to the sidewall of the one end of the well pipe 1 close to the well hole 2, fixing and tensioning the pay-off rope 632 to the one end of the well pipe 1 close to the bottom wall of the well hole 2, and then inserting the well pipe 1 into the limiting cylinder 3;

[0060] S3, while inserting the well pipe 1, the worker adds filter material into the hopper 52, so that the filter material fills between the limiting cylinder 3 and the well hole 2;

[0061] S4, after the well pipe 1 is installed, the construction device arranged above the well hole 2 is removed, and then a submersible pump and a water outlet pipe are installed in the well pipe 1, and the precipitation well construction is completed.

[0062] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dewatering well construction device, comprising a wellbore (2) for installing a well pipe (1), characterized in that: The well hole (2) is equipped with a limiting cylinder (3) to limit the well pipe (1). The diameter of the limiting cylinder (3) is not less than the diameter of the well pipe (1). A material spreading mechanism (5) is installed above the well hole (2) to fill the gap between the limiting cylinder (3) and the well hole (2). The material spreading mechanism (5) includes a horizontally rotatable rotating plate (51) and a hopper (52) installed at the edge of the rotating plate (51). The outlet of the hopper (52) faces the gap between the limiting cylinder (3) and the well hole (2). Above the material spreading mechanism (5) is a drive mechanism (6) for driving the rotating plate (51) to rotate horizontally. The drive mechanism (6) includes a transmission assembly (62) and a drive motor (61). The transmission assembly (62) includes a first bevel gear (621) and a second bevel gear (622) meshing with the first bevel gear (621). The axis of the first bevel gear (621) is fixedly connected to the output end of the drive motor (61), and the second bevel gear (622) is fixedly coaxially with the rotating plate (51). The transmission assembly (62) is also connected to a fixing assembly (63), which includes a wire feeding roller (631) coaxially fixed with the first bevel gear (621). The axis of the wire feeding roller (631) is perpendicular to the well pipe (1). A wire feeding rope (632) is wound on the wire feeding roller (631). One end of the wire feeding rope (632) away from the wire feeding roller (631) is fixed to one end of the well pipe (1) near the bottom wall of the well hole (2). Above the drive mechanism (6) is a winding mechanism (7), which includes a rotating roller (72) located outside the well pipe (1). The axis of the rotating roller (72) is parallel to the axis of the well pipe (1). A nylon net (73) is wound on the rotating roller (72). One end of the nylon net (73) away from the rotating roller (72) is fixed to the outer wall of the well pipe (1). The transmission assembly (62) also includes a third bevel gear (623) meshing with the first bevel gear (621). The third bevel gear (623) is located above the second bevel gear (622). The rotating roller (72) is installed on the side of the third bevel gear (623) away from the first bevel gear (621).

2. The dewatering well construction device according to claim 1, characterized in that: Multiple magnetic pieces (6321) are fixed on the laying rope (632). The multiple magnetic pieces (6321) are fixed at intervals along the length of the laying rope (632). The well pipe (1) is made of metal. The magnetic pieces (6321) are pressed against the well pipe (1).

3. The dewatering well construction device according to claim 2, characterized in that: The limiting cylinder (3) is also fixed with a plurality of limiting rods (31) at one end near the bottom wall of the well hole (2). The plurality of limiting rods (31) are fixed at even intervals along the circumferential surface of the limiting cylinder (3). The length of the limiting rod (31) is equal to the distance between the outer wall of the limiting cylinder (3) and the inner wall of the well hole (2).

4. The dewatering well construction device according to claim 3, characterized in that: It also includes a limiting mechanism (8), which is located above the winding mechanism (7). The limiting mechanism (8) includes two support brackets (81), which are symmetrically arranged about the axis of the well pipe (1). The support brackets (81) are in contact with the outer wall of the well pipe (1).

5. A construction method for the dewatering well construction device according to claim 4, characterized in that: Includes the following steps: S1. Excavate the well hole (2) from the ground. S2. First, insert the limiting cylinder (3) into the well hole (2), then place the construction device above the well hole (2), and then hoist the well pipe (1) between the two support brackets (81). Fix the nylon net (73) on the rotating roller (72) to the side wall of the well pipe (1) near the well hole (2), and fix the line rope (632) to the end of the well pipe (1) near the bottom wall of the well hole (2) and tighten it. Then insert the well pipe (1) into the limiting cylinder (3). S3. While inserting the well pipe (1), the operator adds filter material into the hopper (52) so that the filter material fills the space between the limiting cylinder (3) and the well hole (2). S4. After the well pipe (1) is installed, remove the construction device set above the well hole (2), and then install the submersible pump and water outlet pipe into the well pipe (1) to complete the dewatering well construction.

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