A gravity-type high-pressure water jet well drilling device

Abstract

This invention discloses a gravity-type high-pressure water jet well drilling device. The device utilizes the impact force of the high-pressure water jet to excavate the well. A gravity hammer is installed on the water jet nozzle, applying vertical gravity and balancing the recoil force of the high-pressure water jet. The gravity hammer is suspended by a steel wire rope, ensuring that it constantly applies gravity to the water jet nozzle, thus effectively controlling the verticality of the dewatering well. During drilling, a support frame supports the water jet nozzle and gravity hammer, and the high-pressure water jet impacts the well. The drilling speed and depth are controlled by a winch and steel wire rope, completing the drilling of deep well points. This invention solves the problem of drilling rigs relying on lifting equipment and transportation machinery to enter the pit, changing the traditional drilling method, simplifying the drilling equipment, and effectively controlling the verticality of the dewatering well. It has the advantages of simple structure, quick loading and unloading, convenient drilling, and high efficiency.

Description

Technical Field

[0001] This invention relates to well drilling equipment in the field of deep well dewatering technology, and in particular to a gravity-type high-pressure water jet well drilling device. Background Technology

[0002] Deep foundation pit excavation is an important construction procedure for underground structures of modern large-scale buildings. Lowering the groundwater level in the foundation pit is also known as groundwater control, which means lowering the groundwater level during foundation pit construction to meet the requirements of the retaining structure and excavation. The higher the groundwater level in the construction environment, the deeper the foundation is required, and the greater the construction difficulty.

[0003] In the current deep foundation pit excavation process, in order to prevent the foundation pit from affecting the surrounding environment, it is necessary to set up retaining walls and supports inside the foundation pit. Due to the setting of retaining walls and supports, lifting equipment and well drilling machinery cannot enter the foundation pit, which brings inconvenience to the installation and construction of deep well point dewatering equipment. The design of a gravity-type high-pressure water gun well drilling device, equipped with an easy-to-disassemble, easy-to-install, and miniaturized well drilling machine, is an effective measure to solve the problem of implementing deep well point dewatering projects in foundation pits with retaining walls and supports. Summary of the Invention

[0004] The purpose of this invention is to provide a gravity-type high-pressure water jet well drilling device to address the shortcomings of existing technologies. This invention utilizes the impact force of the high-pressure water jet to excavate the well. A gravity hammer is installed on the water jet nozzle, applying vertical gravity and balancing the recoil force of the high-pressure water jet. The gravity hammer is connected by a support frame and steel wire rope suspension, ensuring that the gravity hammer always applies gravity to the water jet nozzle, thus effectively controlling the verticality of the dewatering well. During the drilling process, the support frame supports the water jet nozzle and gravity hammer, and the high-pressure water jet impacts the well. The hoisting of the gravity hammer and water jet nozzle is controlled by a winch and steel wire rope, allowing for the drilling of deep wells. This invention solves the problem of drilling rigs relying on lifting and transport machinery to enter the pit, changing the traditional drilling method, simplifying drilling equipment, reducing mud production, and effectively controlling the verticality of the dewatering well. This invention has the advantages of simple structure, quick loading and unloading, convenient drilling, and high efficiency.

[0005] The specific technical solution for achieving the objective of this invention is as follows:

[0006] A gravity-type high-pressure water jet well drilling device, characterized by a support frame, a gravity hammer, a water jet nozzle, a return hood, a high-pressure hose, a high-pressure pump, a wire rope, a winch, and a water pipe retractor.

[0007] The support frame is a well-shaped rectangular frame, and the top of the rectangular frame is respectively equipped with a wire rope pulley and a high-pressure hose pulley;

[0008] The gravity hammer consists of a columnar plumb bob and a connecting flange. The plumb bob has a second flexible hose hole at its axis, a flange connecting seat on its upper end face, and a nozzle interface on its lower end face. The connecting flange has a first flexible hose hole at its center, a sub-port on one side, and several wire rope lifting lugs around its perimeter on the other side. The connecting flange is mounted on the plumb bob, and the sub-port of the connecting flange is fastened to the flange connecting seat of the plumb bob with bolts.

[0009] The water gun nozzle is bullet-shaped, with a nozzle connector and a hose connector at its tail along the axial direction, an axial flow channel through the center, and several radial flow channels communicating with the axial flow channel.

[0010] The wire rope is provided with a knot, one end of which is a single wire rope and the other end of which is a plurality of wire ropes arranged in parallel.

[0011] The return flow hood is an inverted basin-shaped body formed by two half-shells fastened together. The top surface of the return flow hood has a wellhead hole in the center and several notches along the radial direction, with a lock on the notch.

[0012] The wire rope is installed in the support frame through a node. The single wire rope at the upper end of the node passes around the wire rope pulley at the top of the support frame and is connected to the winch. The multiple wire ropes at the lower end of the node are respectively connected to several wire rope lifting lugs on the gravity hammer connecting flange.

[0013] The high-pressure hose passes around the high-pressure hose pulley at the top of the support frame. One end of the hose passes through the first hose hole of the connecting flange on the gravity hammer and the second hose hole of the plumb bob and connects to the hose connector on the water gun nozzle. The other end is wrapped around the hose reel and connected to the high-pressure pump.

[0014] The water gun nozzle is connected to the nozzle interface of the gravity hammer's upper body via a nozzle connector;

[0015] The reflux hood is located at the bottom of the support frame, and the notch of the reflux hood is engaged with the frame and the latch is connected to the frame.

[0016] The water gun nozzle has several radial flow channels and axial flow channels arranged in a Y-shape.

[0017] This invention uses a gravity-type high-pressure water jet for well drilling, utilizing the impact force of the high-pressure water jet to excavate the well. This solves the problem that drilling rigs rely on lifting equipment and transportation machinery to enter the foundation pit, changes the previous method of drilling wells, and simplifies the drilling equipment.

[0018] This invention employs a gravity hammer installed on the water gun nozzle. The gravity hammer applies vertical gravity and balances the recoil force of the high-pressure water gun. The gravity hammer is connected by a support frame and a steel wire rope 7 for suspension, ensuring that the gravity hammer always applies gravity to the water gun nozzle, thereby effectively controlling the verticality of the dewatering well.

[0019] This invention employs a flexible hose reel, facilitating the synchronous winding and unwinding of the high-pressure hose on the hose reel and the wire rope of the winch. Furthermore, the weight of the gravity hammer and water nozzle is balanced by the wire rope, preventing it from being entirely applied to the high-pressure hose. When the gravity hammer and water nozzle descend, the tension on the high-pressure hose is only balanced by the elastic force on the hose reel, allowing the high-pressure hose to release automatically. This ensures that the tension on the high-pressure hose does not exceed its limit, achieving synchronous winding and unwinding of the high-pressure hose on the hose reel and the wire rope of the winch.

[0020] This invention has the advantages of simple structure, quick loading and unloading, convenient well drilling and high efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 for Figure 1 Top view of section A-A;

[0023] Figure 3 for Figure 1 A magnified structural diagram of part B. Implementation Example

[0024] On-site installation of this invention:

[0025] See Figure 1 , Figure 2 , Figure 3 Install and fix the support frame 1 above the designed well point, install the winch 8, water pipe winder 9 and high pressure pump 6 around the support frame 1, and connect the outlet of the high pressure pump 6 to the inlet of the shaft of the water pipe winder 9.

[0026] Place the gravity hammer 2 and the water gun nozzle 3 at the bottom of the support frame 1;

[0027] Loosen a section of the head of the wire rope 7 wound on the winch 8, and place the wire rope 7 around the wire rope pulley 11 at the top of the support frame 1 inside the support frame 1.

[0028] Connect the node 71, which has three parallel steel wire ropes 7, to the steel wire rope 7 in the support frame 1, and connect the other ends of the three steel wire ropes 7 to the three steel wire rope lugs 221 on the connecting flange 22 of the gravity hammer 2 respectively.

[0029] Loosen a section of the head of the high-pressure hose 5 wrapped around the water pipe reel 9, and place the high-pressure hose 5 around the high-pressure hose pulley 12 at the top of the support frame 1 and place it inside the support frame 1.

[0030] The high-pressure hose 5 is sequentially passed through the first hose hole 223 of the connecting flange 22 on the gravity hammer 2 and the second hose hole 212 of the plumb body 21 and connected to the hose connector 34 on the water gun nozzle 3.

[0031] The water gun nozzle 3 is connected to the nozzle interface 213 of the upper part 21 of the gravity hammer 2 via the nozzle connector 31.

[0032] Start the winch 8 and tighten the wire rope 7 so that the water gun nozzle 3 and the gravity hammer 2 are in a position that is off the ground within the support frame 1.

[0033] Install the return flow cover 4 at the bottom of the support frame 1, so that the notch 41 of the return flow cover 4 is engaged with the frame and the buckle 42 is connected to the frame, and the two half shells are connected by screws.

[0034] The on-site installation of this invention is now complete.

[0035] This invention can be installed on mobile transport machinery and used in conjunction with it. Example

[0036] This invention works as follows:

[0037] See Figure 1 , Figure 2 , Figure 3 Start the winch 8 and slowly release the wire rope 7 so that the water gun nozzle 3 and the gravity hammer 2 move downward in the support frame 1, passing through the well hole 43 in the center of the return shroud 4 and being positioned near the ground.

[0038] The high-pressure pump 6 is started, and high-pressure water is delivered to the water gun nozzle 3 through the high-pressure hose 5. The high-pressure water is sprayed downward from the axial flow channel 32 of the water gun nozzle 3, impacting the ground soil to drill a well. At the same time, since the axial flow channel 32 and the radial flow channel 33 of the present invention are arranged in a Y shape, the high-pressure water is sprayed outward and upward from the radial flow channel 33 of the water gun nozzle 3. The arrangement of the radial flow channel 33 is used to enlarge the hole and apply a concentrated and downward reaction force to the water gun nozzle 3, and the soil is flushed back to the ground. As the well is drilled deeper, the winch 8 slowly winds up and unwinds the wire rope 7, and the water pipe reel 9 slowly winds up and unwinds the high-pressure hose 5 until the drilling depth is completed.

[0039] See Figure 1 , Figure 2 To prevent the high-pressure water sprayed from the radial flow channel 33 on the water gun nozzle 3 from splashing randomly or injuring construction personnel, the present invention designs a return flow cover 4 at the bottom of the support frame 1.

[0040] See Figure 1 , Figure 2To facilitate the synchronous winding and unwinding of the high-pressure hose 5 on the hose reel 9 and the wire rope 7 of the winch 8, this invention uses a flexible hose reel 9. Under the downward force of gravity of the gravity hammer 2 and the water gun nozzle 3, the high-pressure hose 5 on the hose reel 9 is released automatically. When the gravity hammer 2 and the water gun nozzle 3 stop running or move upward under the control of the wire rope 7 and the winch 8, the high-pressure hose 5 on the hose reel 9 will stop releasing or retract automatically under the action of elasticity, so as to realize the synchronous winding and unwinding of the high-pressure hose 5 on the hose reel 9 and the wire rope 7 of the winch 8.

[0041] To facilitate the connection between the high-pressure pump 6 and the high-pressure hose 5, the present invention provides a rotary joint on the hose reel 9, that is, the rotary joint is connected between the outlet of the high-pressure pump 6 and the inlet of the high-pressure hose 5.

[0042] See Figure 1 , Figure 2 , Figure 3 In this invention, the water gun nozzle 3 and the gravity hammer 2 are suspended inside the support frame 1 by the wire rope pulley 11 at the top of the support frame 1. Under the action of the gravity hammer 2, the water gun nozzle 3 always maintains a vertical downward posture, which not only improves the stability of well drilling, but also effectively controls the diameter and verticality of the dewatering well.

[0043] See Figure 1 , Figure 2 , Figure 3 To reduce the number of joints in the high-pressure hose 5 in this invention, the high-pressure hose 5 is bypassed by the high-pressure hose pulley 12 at the top of the support frame 1, and then passes through the first hose hole 223 of the connecting flange 22 on the gravity hammer 2 and the second hose hole 212 of the plumb bob 21, and is directly connected to the hose connector 34 on the water gun nozzle 3. Reducing the number of joints reduces the number of leaks in the high-pressure hose 5 and improves the reliability of well drilling.

[0044] This invention solves the problem that drilling rigs rely on lifting equipment and transportation machinery to enter the foundation pit, changes the previous drilling method, simplifies drilling equipment, reduces drilling mud production, and effectively controls the verticality of dewatering wells. This invention has the advantages of simple structure, quick loading and unloading, convenient drilling, and high efficiency.

Claims

1. A gravity-type high-pressure water jet well drilling device, characterized in that, It includes a support frame (1), a gravity hammer (2), a water gun nozzle (3), a return shroud (4), a high-pressure hose (5), a high-pressure pump (6), a wire rope (7), a winch (8), and a water pipe rewinder (9). The support frame (1) is a well-shaped rectangular frame, and the top of the rectangular frame is provided with a wire rope pulley (11) and a high-pressure hose pulley (12). The gravity hammer (2) is composed of a columnar pendulum (21) and a connecting flange (22). The axis of the pendulum (21) is provided with a second hose hole (212). The upper end face of the pendulum (21) is provided with a flange connecting seat (211), and the lower end face is provided with a nozzle interface (213). The connecting flange (22) has a first flexible hose hole (223) at its center, a sub-port (222) on one side, and several wire rope lifting lugs (221) around its perimeter on the other side; the connecting flange (22) is mounted on the plumb bob (21), and the sub-port (222) of the connecting flange (22) is fastened to the flange connecting seat (211) of the plumb bob (21) with bolts; The water gun nozzle (3) is bullet-shaped, with a nozzle connector (31) and a hose connector (34) along the axial direction at its tail, an axial flow channel (32) through the center, and several radial flow channels (33) through the axial flow channel (32). The wire rope (7) is provided with a knot (71), one end of the knot (71) is a single wire rope (7), and the other end of the knot (71) is multiple wire ropes (7) arranged in parallel. The return flow hood (4) is an inverted basin-shaped body formed by two half shells fastened together. The top surface of the return flow hood (4) is provided with a wellhead hole (43) in the center and several notches (41) in the radial direction. The notches (41) are provided with latches (42). The wire rope (7) is installed in the support frame (1) through the node (71). The single wire rope (7) at the upper end of the node (71) passes around the wire rope pulley (11) at the top of the support frame (1) and is connected to the winch (8). The multiple wire ropes (7) at the lower end of the node (71) are respectively connected to several wire rope lugs (221) on the connecting flange (22) of the gravity hammer (2). The high-pressure hose (5) passes around the high-pressure hose pulley (12) at the top of the support frame (1), and one end of it passes through the first hose hole (223) of the connecting flange (22) on the gravity hammer (2) and the second hose hole (212) of the plumb bob (21) and connects to the hose connector (34) on the water gun nozzle (3). The other end is wrapped around the water hose reel (9) and connected to the high-pressure pump (6). The water gun nozzle (3) is connected to the nozzle interface (213) of the upper body (21) of the gravity hammer (2) via the nozzle connector (31); The return flow hood (4) is located at the bottom of the support frame (1), and the notch (41) of the return flow hood (4) is engaged with the frame and the buckle (42) is connected to the frame.

2. The gravity-type high-pressure water jet well-drilling device according to claim 1, characterized in that, The water gun nozzle (3) has several radial flow channels (33) and axial flow channels (32) arranged in a Y-shape.

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