A precipitation well digging device and a well digging method

Abstract

The invention discloses a dewatering well drilling device and a well drilling method in the field of well point dewatering technology, comprising a central tube and an expansion tube, wherein the expansion tubes are uniformly distributed circumferentially outside the central tube, and a fixed sleeve outside the expansion tube is provided with a fixed ring and a sliding ring is provided for sliding movement; an inner hole and a tangential hole are provided on the tube wall of the expansion tube, and the tangential holes are staggered and symmetrically arranged up and down; a reversing ring is slidably connected inside the expansion tube, and the reversing ring can move up and down for selectively blocking the tangential holes; the sliding ring can move up and down to drive the reversing ring to move up and down; a bottom hole is provided at the bottom of the central tube, and the top of the central tube extends upward for connecting a power tube, and a diffusion tube is rotatably connected outside the central tube, and the diffusion tube connects the central tube and the expansion tube; the invention can make the expansion tube rotate left and right repeatedly, change the injection direction of the inner hole, improve the punching efficiency, reduce repeated lifting, shaking and rotating operations, and greatly reduce manpower input.

Description

Technical Field

[0001] The invention relates to the technical field of well point dewatering, in particular to a dewatering well drilling device and a well drilling method. Background Art

[0002] Modern buildings generally need to excavate foundation pits before construction, and according to the depth of the foundation pit excavation and the geology of the foundation pit, it is necessary to select construction drainage measures according to the situation to meet the water level requirements. For some shallow surface layers, loose soil and precipitation control measures, automatic equipment is used to dig wells. First, automatic equipment is often heavy, the required construction range is large, and the depth of the well is also large; but when constructing in this soil and situation, it is also necessary to match the equipment platform and free up a certain space, and the required depth is not large, so it is often a waste of resources; most of the existing technologies make pipe wells by spraying water to flush and drill holes and then inserting pipes to meet the drainage and precipitation needs. It is more flexible and convenient, and the cost is low, but this method does not have special equipment. Generally, a single-hole gun head is manually carried to drill a thinner hole first, and then a larger gun head is used to drill the required hole; and when drilling holes, it is often necessary to manually repeatedly pull, shake, and rotate the gun head to change the position of the produced gun head to change the direction of water flow flushing, remove the obstruction, and then lower the gun head until the drilling is completed, which is very labor-intensive and has low construction efficiency.

[0003] Based on this, the present invention designs a precipitation well-drilling device and a well-drilling method to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a dewatering well-drilling device and a well-drilling method to solve the problem in the above-mentioned background technology that manual drilling often requires manual repeated pulling, shaking, and rotating to change the position of the manufactured gun head to change the flushing direction of the water flow, which is very labor-intensive and has low construction efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: comprising a central tube and a reaming tube, wherein the reaming tubes are uniformly distributed outside the central tube, and the reaming tubes are provided with a fixed ring and a sliding ring for sliding;

[0006] The wall of the expansion tube is provided with inner holes and tangential holes, and the tangential holes are staggered and symmetrically arranged up and down;

[0007] A reversing ring is slidably connected inside the reaming tube, and the reversing ring can move up and down to selectively block the tangential hole. The reversing ring is open, and the opening corresponds to the inner hole;

[0008] The sliding ring can move up and down and drive the reversing ring to move up and down;

[0009] A bottom hole is provided at the bottom of the central tube, and the top of the central tube extends upward to be connected to the power tube. A diffusion tube is rotatably connected to the outside of the central tube, and the diffusion tube connects the central tube and the expansion tube.

[0010] As a further solution of the present invention, an upper sliding shaft and a lower sliding shaft are rotatably connected inside the reaming tube, and a traction ring is commonly sleeved outside the upper sliding shaft and the lower sliding shaft. The reversing ring is fixedly connected to the traction ring, the upper sliding shaft passes through the reaming tube and is rotatably connected thereto and an external gear is fixedly connected to the end thereof, an internal rack is fixedly connected to the inner side of the sliding ring, and the internal rack meshes with the external gear.

[0011] As a further solution of the present invention, an attraction ring is slidably connected to the outside of the expansion tube, the reversing ring is a magnet ring, the attraction ring and the reversing ring are magnetically matched, and a connecting rod is fixedly connected to the top of the attraction ring, and the connecting rod is fixedly installed at the bottom of the sliding ring.

[0012] As a further solution of the present invention, a U-shaped rod is fixedly connected to the bottom of the reversing ring, one end of the U-shaped rod is bent upward and located outside the reaming tube, and the upper end of the U-shaped rod located outside is fixedly connected to the sliding ring.

[0013] As a further solution of the present invention, a connecting bracket is fixedly connected to the top of the sliding ring, and a double-chamber cylinder is installed on the top of the connecting bracket. The upper cavity cross-section of the double-chamber cylinder is larger than the lower cavity cross-section, and a large pull rod is slidably connected in the upper cavity, and a long pull rod is slidably connected in the lower cavity. The long pull rod is fixedly connected to the connecting bracket, and the double-chamber cylinder is installed on the outside of the diffuser tube, and the large pull rod moves downward to push the long pull rod out.

[0014] As a further solution of the present invention, a mounting ring is fixedly connected to the outside of the central tube, the double-chamber cylinder is installed below the mounting ring, an operating rod is ball-jointed in the mounting ring, an annular ball groove ring is jointly and fixedly connected to the top end of the large pull rod, a ball head rod is ball-jointed between the operating rod and the annular ball groove ring, a limiting cylinder is fixedly connected to the top of the mounting ring, and the operating rod is located in the limiting cylinder.

[0015] As a further solution of the present invention, the operating rod is symmetrically provided with a group, a sliding ring is provided above the mounting ring, a pipeline guide wheel is rotatably connected inside the sliding ring, and the sliding ring ball is connected to the outside of the operating rod.

[0016] As a further solution of the present invention, the bottom of the central tube can be threadedly connected to an extended middle tube, the outside of the extended middle tube is fixedly connected to a guide ring, the inside of the central tube is fixedly connected to a docking tube, the bottom end of the docking tube is docked with the upper end of the extended middle tube, and the docking tube and the outside of the central tube can be connected to the power tube through an external branch pipe.

[0017] A precipitation well digging method comprises the following steps:

[0018] S1: Move the center tube and the expansion tube to the positioning position, connect the external high-pressure water, introduce it into the center tube and the expansion tube through the power pipe, vertically lower the center tube and the expansion tube through the operating rod, and punch holes with the sprayed high-pressure water;

[0019] S2: By shaking or pulling up and down the operating lever, the center tube and the expansion tube are smoothly lowered and rotated forward and backward to form holes evenly;

[0020] S3: Punch holes evenly on the outside of the corrugated pipe and tie the mesh cloth outside the corrugated pipe;

[0021] S4: The tied corrugated pipes are butt-jointed and lowered into the formed holes one by one to form a precipitation well;

[0022] S5: Fill and lay filter materials in the bottom of the precipitation well and outside the wellhead, and then place a submersible pump to pump water to achieve precipitation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] Repeatedly switching the position of the reversing ring can make the expansion tube repeatedly rotate left and right, and then when flushing the hole, the injection direction of the inner hole can be changed, so that the inner hole injection punching is more uniform, and the punching efficiency is improved. At the same time, the jetting water of the tangential hole is also conducive to clearing the side obstacles and obtaining a larger hole position, reducing repeated lifting, shaking and rotating operations, so that the hole can be opened smoothly for well construction, which greatly reduces the manpower investment and facilitates the subsequent placement of the bellows.

[0025] The sliding ring can be moved up and down the required distance by a slight swing of the operating lever, thereby completing the switching of the hole position, thereby changing the water outlet direction, so that the expansion tube can be repeatedly rotated to open the hole without other unnecessary operations, without increasing the workload of construction personnel, reducing manpower input, and without the need for external power.

[0026] The smaller center hole can be flushed first by extending the middle tube, and then expanded by flushing through the expansion tube above to form the required final hole position, thereby achieving one-time success, simplifying the hole opening process, and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the core structure of the present invention;

[0028] Figure 2 A half-section schematic diagram of the core structure of the present invention;

[0029] Figure 3 Schematic diagrams of three embodiments of the expansion tube of the present invention;

[0030] Figure 4 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 5 It is a half-section schematic diagram of the overall structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the water spray direction when the reversing ring of the present invention is located at the bottom;

[0033] Figure 7 It is a schematic diagram of the water spray direction when the reversing ring of the present invention is located at the upper part;

[0034] Figure 8 It is a schematic diagram of the operating rod of the overall structure of the present invention when it is upright;

[0035] Fig. 9 This is a schematic diagram of the overall structure of the present invention when the operating rod is tilted;

[0036] Fig.10 It is a half-section schematic diagram of the double-chamber cylinder of the overall structure of the present invention;

[0037] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure of part A in the middle.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. Center tube; 2. Expanding tube; 3. Fixed ring; 4. Sliding ring; 5. Inner hole; 6. Tangential hole; 7. Reversing ring; 8. Bottom hole; 9. Diffuser; 101. Upper sliding shaft; 102. Lower sliding shaft; 103. Traction ring; 104. External gear; 105. Internal rack; 201. Attraction ring; 202. Connecting rod; 301. U-shaped rod; 18. Connecting bracket; 19. Double-chamber cylinder; 20. Upper chamber; 21. Large pull rod; 22. Lower chamber; 23. Long pull rod; 24. Mounting ring; 25. Operating rod; 26. Annular ball groove ring; 27. Ball head rod; 28. Limiting tube; 29. ​​Sliding ring; 30. Pipe guide wheel; 31. Extended middle tube; 32. Guide ring; 33. Butt tube; 34. External branch pipe. DETAILED DESCRIPTION

[0040] See also Figure 1-11 The working principle of the technical solution provided by the present invention is as follows:

[0041] When the device is used, the central pipe 1 is manually placed at the pre-precipitation location, and a high-pressure device is connected to the power pipe. High-pressure water is sprayed through the holes of the central pipe 1 and the expansion pipe 2 to flush the hole. The central pipe 1 is continuously lowered according to the hole depth to drill the pipe diameter of the required depth.

[0042] While forming the hole, the sliding ring 4 is moved up and down, thereby driving the reversing rings 7 in all the reaming tubes 2 to move up and down, thereby switching the tangential holes 6 for water discharge. Since the tangential holes 6 are opened on the sides of the reaming tube 2 and are located on both sides, when the reversing ring 7 is at the bottom, the high-pressure water flows from Figure 6 The water is sprayed in the direction shown, thereby giving a reaction force to the expansion tube 3, which can make the expansion tube 2 rotate in the opposite direction of the water spray with the central tube 1 as the axis. At the same time, the diffuser 9 rotates around the periphery of the central tube 1 while maintaining communication; when the reversing ring 7 is located at the upper part, the tangential hole 6 at the bottom is exposed and the tangential hole 6 at the upper part is blocked, the high-pressure water flows out from the expansion tube 2 as shown in FIG. Figure 7 The water is sprayed in the direction shown, and the expansion tube 3 rotates in the opposite direction of the water spray with the center tube 1 as the axis; since the two tangential holes 6 are opened in different directions, the position of the reversing ring 7 is repeatedly switched, so that the expansion tube 3 can be repeatedly rotated left and right, and then when flushing the hole, the spray direction of the inner hole 5 can be changed, so that the injection punching of the inner hole 5 is more uniform, and the punching efficiency is improved. At the same time, the water sprayed from the tangential hole 6 is also conducive to clearing side obstacles, obtaining a larger hole position, and facilitating the subsequent placement of the bellows. Example

[0043] All expansion tubes 2 are made of Figure 3 The left figure shows the structure, taking the reversing ring 7 at the bottom as the initial state as an example, when the sliding ring 4 rises, the inner rack 105 inside the sliding ring 4 moves upward to drive the outer gear 104 to rotate, and the reversing ring 7 is pulled upward by the rotation of the traction ring 103, releasing the bottom tangential hole 6, covering the upper tangential hole 6, and changing the lateral water outlet direction. Most of the specific components are located on the inside, and the gear rack located on the outside can adapt to relatively harsh environments and is easy to operate. Example

[0044] All expansion tubes 2 are made of Figure 3 The middle figure schematically shows the structure, taking the reversing ring 7 at the bottom as an initial state as an example, when the sliding ring 4 rises, the attraction ring 201 is directly driven to rise through the connecting rod 202, and then the position of the internal reversing ring 7 is changed through magnetic attraction, thereby changing the lateral water outlet direction; the structure is simple and easy to manufacture. Example

[0045] All expansion tubes 2 are made of Figure 3 The right side figure shows the structure, taking the reversing ring 7 at the bottom as an initial state as an example, when the sliding ring 4 rises, the reversing ring 7 is directly driven to rise through the U-shaped rod 301, changing the position of the water outlet hole, and then changing the lateral water outlet direction; the structure is simple, easy to manufacture, and more reliable to use.

[0046] like Figure 8 When the operating rod 25 is in the vertical position, the reversing ring 7 is located at the hole position of the tangential hole 6 at the bottom; Fig. 9As shown, when the center tube 1 is inserted and moved downward to continuously flush the hole, the operating rod 25 needs to be assisted in moving downward, and the operating rod 25 is shaken or pulled up and down to speed up the hole forming. When the operating rod 25 is shaken, the operating rod 25 rotates with the ball joint with the mounting ring 24 as the center of the circle, and then the bottom of the operating rod 25 is skewed, and then the annular ball groove ring 26 is pulled upward by the ball head rod 27, and then all the large pull rods 21 are lifted upward, and the double-chamber cylinder 19 is filled with hydraulic oil. When the large pull rod 21 is lifted, the large pull rod 21 and the long pull rod 2 3, the hydraulic oil capacity between them remains unchanged, so the long pull rod 23 is also lifted upwards. Since the cross section of the upper cavity 20 is larger than that of the lower cavity 21, the long pull rod 23 can be moved upwards by a slight upward movement to move a large distance, and then the sliding ring 4 can be moved up and down by a slight swing of the operating rod 25 to complete the switching of the hole position, thereby changing the water outlet direction, so that the expansion tube 2 can be repeatedly rotated to open the hole without other redundant operations, without increasing the workload of the construction personnel, and without external power, and is durable and easy to maintain;

[0047] The vertical displacement of the operating rod 25 caused by the tilt causes the large pull rod 21 and the long pull rod 23 to move, which is related to the cross-sectional area ratio of the upper cavity 20 and the lower cavity 21. The greater the difference in the ratio, the longer the distance the long pull rod 23 moves.

[0048] When the water outlet direction is changed so that the expansion tube 2 can rotate around the central tube 1 to spray water to form a hole, the ball head rod 27 can rotate in the annular ball groove ring 26, thereby enabling the sliding ring 4 and the connecting bracket 18 to rotate, thereby achieving repeated rotation of the expansion tube 2; at the same time, the operating rod 25 can be tilted and shaken in any direction, which can play the role of pulling the large pull rod 21;

[0049] The rotation angle of the operating rod 25 can be limited by the limiting cylinder 8. The closer the outer wall of the operating rod 25 is to the limiting cylinder 8, the smaller the rotation angle.

[0050] In addition to the above-mentioned method, the operating rod 25 may be non-rotatable, and a push rod or hydraulic cylinder or other feasible methods may be directly installed at the bottom of the operating rod 25 to enable the large pull rod 21 to rotate around the central tube 1 in an annular manner.

[0051] If the bottom end of the original center tube 1 is removed and the extended middle tube 31 is connected to the center tube 1, the extended middle tube 31 is connected to the external power tube through the docking tube 33, so that there is a certain distance between the bottom of the extended middle tube 31 and the bottom of the expansion tube 2, the smaller center hole can be flushed preferentially through the extended middle tube 31, and then expanded by the expansion tube 2 above to form the required final hole position, thereby achieving one-time success, simplifying the hole opening process, and improving construction efficiency.

[0052] During combined construction, two groups of high-pressure equipment can be connected through the external branch pipe 34, and water can be connected through two power pipes respectively to ensure sufficient power. Connecting holes can also be provided on the side walls of the extended middle tube 31 and the butt tube 33 to connect a group of equipment with greater power to supply water to the extended middle tube 31 and the expansion tube 2 at the same time. The specific method to be used can be determined according to the on-site conditions.

[0053] When taking over the pipe, the power pipe can be placed in the pipe guide wheel 30. When the operating rod 25 is continuously lowered, the sliding ring 29 is continuously moved up to make a smooth transition at the pipe bend to avoid blockage in the pipe bend and affect the water output. The connection between the sliding ring 29 and the operating rod 25 should not be too tight, so that the operating rod 25 can meet the shaking requirements.

[0054] While the holes are being drilled, another group of construction workers can make a pipe well by evenly drilling holes on the outside of the corrugated pipe and then tying the mesh on the outside with wire to make pipes in sections. After making them, they are inserted into the flushed holes and the joints between the sections are tightly connected. After filling a proper amount of melon seeds at the bottom of the pipe and the outside of the pipe end, a submersible pump can be put in to pump out and drain water.

Claims

1. A dewatering well drilling device, comprising a central tube (1) and a reamer tube (2), characterized in that: The expansion tubes (2) are evenly distributed around the outside of the central tube (1); the expansion tubes (2) are provided with a fixed ring (3) and a sliding ring (4) on the outer fixed sleeve. The wall of the expansion tube (2) is provided with an inner hole (5) and a tangential hole (6), and the tangential holes (6) are arranged symmetrically and staggered up and down; A reversing ring (7) is slidably connected inside the expansion tube (2), and the reversing ring (7) can move up and down to selectively block the tangential hole (6). The reversing ring (7) is open, and the opening corresponds to the inner hole (5); The sliding ring (4) can move up and down, thereby driving the reversing ring (7) to move up and down; The bottom of the central tube (1) is provided with a bottom hole (8); the top of the central tube (1) extends upwards for connecting to a power tube; the outside of the central tube (1) is rotatably connected to a diffuser tube (9); the diffuser tube (9) is connected to the central tube (1) and the expansion tube (2); The top of the sliding ring (4) is fixedly connected to a connecting bracket (18), and a double-chamber cylinder (19) is installed on the top of the connecting bracket (18). The cross-section of the upper chamber (20) of the double-chamber cylinder (19) is larger than the cross-section of the lower chamber (22), and a large pull rod (21) is slidably connected in the upper chamber (20), and a long pull rod (23) is slidably connected in the lower chamber (22). The long pull rod (23) is fixedly connected to the connecting bracket (18). The double-chamber cylinder (19) is installed on the outside of the diffuser tube (9), and the large pull rod (21) moves downward to push out the long pull rod (23); The outer side of the central tube (1) is fixedly connected to a mounting ring (24), the double-chamber cylinder (19) is installed below the mounting ring (24), an operating rod (25) is ball-connected inside the mounting ring (24), the top of the large pull rod (21) is fixedly connected to an annular ball groove ring (26), a ball head rod (27) is ball-connected between the operating rod (25) and the annular ball groove ring (26), a limiting cylinder (28) is fixedly connected to the top of the mounting ring (24), and the operating rod (25) is located inside the limiting cylinder (28).

2. A precipitation well drilling device according to claim 1, characterized in that: An upper sliding shaft (101) and a lower sliding shaft (102) are rotatably connected inside the reaming tube (2); a traction ring (103) is sleeved on the outer sides of the upper sliding shaft (101) and the lower sliding shaft (102); the reversing ring (7) is fixedly connected to the traction ring (103); the upper sliding shaft (101) passes through the reaming tube (2) and is rotatably connected thereto, and an outer gear (104) is fixedly connected to the end thereof; an inner rack (105) is fixedly connected to the inner side of the sliding ring (4); the inner rack (105) is meshed with the outer gear (104).

3. A precipitation well drilling device according to claim 1, characterized in that: The expansion tube (2) is slidably connected to an attraction ring (201) on the outside; the reversing ring (7) is a magnet ring; the attraction ring (201) and the reversing ring (7) are magnetically matched; the top of the attraction ring (201) is fixedly connected to a connecting rod (202); the connecting rod (202) is fixedly mounted on the bottom of the sliding ring (4).

4. A precipitation well drilling device according to claim 1, characterized in that: A U-shaped rod (301) is fixedly connected to the bottom of the reversing ring (7), one end of the U-shaped rod is bent upward and is located outside the reaming tube (2), and the upper end of the U-shaped rod (301) located outside is fixedly connected to the sliding ring (4).

5. The precipitation well drilling device according to claim 1, characterized in that: The operating rod (25) is symmetrically provided with a group, a sliding ring (29) is provided above the mounting ring (24), a pipeline guide wheel (30) is rotatably connected inside the sliding ring (29), and the sliding ring (29) is spherically connected to the outside of the operating rod (25).

6. The precipitation well drilling device according to claim 1, characterized in that: The bottom of the central tube (1) can be threadedly connected to an extended middle tube (31), the outside of the extended middle tube (31) is fixedly connected to a guide ring (32), the inside of the central tube (1) is fixedly connected to a butt joint tube (33), the bottom end of the butt joint tube (33) is butt jointed with the upper end of the extended middle tube (31), and the outside of the butt joint tube (33) and the central tube (1) can be connected to a power tube via an external branch tube (34).

7. A method for drilling wells by precipitation, comprising any one of the well drilling devices and bellows according to claims 1 to 6, characterized in that The following steps are involved: S1: Move the central tube (1) and the reaming tube (2) to a positioning position, connect external high-pressure water, introduce it into the central tube (1) and the reaming tube (2) through a power pipe, vertically lower the central tube (1) and the reaming tube (2) through an operating rod (25), and punch holes through the ejected high-pressure water; S2: The operating rod (25) is shaken or pulled up and down, so that the center tube (1) and the expansion tube (2) are smoothly lowered and rotated forward and backward, and the holes are evenly punched and formed; S3: Punch holes evenly on the outside of the corrugated pipe and tie the mesh cloth outside the corrugated pipe; S4: The tied corrugated pipes are butt-jointed and lowered into the formed holes one by one to form a precipitation well; S5: Filter material is filled and laid in the bottom of the precipitation well and outside the wellhead, and then a submersible pump is placed to pump water through the submersible pump to achieve precipitation.

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