Urban sewage pipeline construction drilling tool

Abstract

The utility model provides an urban sewage pipeline construction drilling tool which comprises a drilling rod and a flow guide block, a flow distribution hole is formed in the drilling rod, a flow guide hole is formed in the flow guide block, one end of the flow guide hole serves as a jet orifice, the other end of the flow guide hole serves as a connection opening, the flow guide block is fixedly connected to the outer surface of the drilling rod, and the normal direction of the jet orifice is tangent to the circumferential direction of the drilling rod. And the connection port is communicated with the flow distribution hole. By the adoption of the technical scheme, water can be injected into the flow distribution holes during underground soil body drilling and digging construction, the water flow is sprayed into the soil body after passing through the flow distribution holes, the flow distribution holes and the flow guide holes, the firm underground soil body is wetted, the soil is mixed with the water along with the rotating motion of the drill rod to form soft slurry, and therefore the drill rod can be pushed easily, and the construction efficiency is improved. In addition, the water flow is jetted into the soil body through the jet orifice, and the normal direction of the jet orifice is tangent to the circumferential direction of the drill rod, so that the jet orifice can be prevented from being reversely blocked by infiltrated bentonite, and the drilling machine is kept in a stable and reliable operation state.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering construction tools, in particular to a drilling tool for urban sewage pipeline construction. Background Art

[0002] When laying underground urban sewage pipelines, the pipe jacking construction process is a common construction method. In the prior art, the pipe jacking construction process mostly adopts the construction method of single-direction jacking. With the development of society, people's requirements for underground pipeline construction are getting higher and higher, the laying distance of underground pipelines is getting longer, and the surrounding environment at the laying position of underground pipelines is getting more and more complex. The construction method of single-direction jacking takes a long construction time and has low efficiency, and it is difficult to lay underground pipelines with longer distances.

[0003] For example, the patent document with the publication number of "CN103791159A" discloses a pipe jacking construction method for small-diameter pipelines, which includes the following steps: measuring and setting out, making working wells and receiving wells, installing pipe jacking equipment, guiding drilling, reaming, pulling pipes, successively constructing other pipes, removing pipe jacking equipment, treating pipe heads, and constructing inspection wells and cable trenches. This patented technology improves the construction efficiency effectively by adopting the construction method of drilling, reaming, and then pulling the pipes. The unit pipe joints enter the soil under the combined action of traction force and propulsion force. However, in some areas with hard soil, no matter adopting the pulling method or the pushing method, a greater force is required to make the unit pipe joints enter the soil. Correspondingly, the output power of the drilling equipment must increase, and the external shape volume of the drilling equipment also increases synchronously, resulting in a limited improvement in construction efficiency. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a drilling tool for urban sewage pipeline construction.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a drilling tool for urban sewage pipeline construction, which includes a drill rod and a flow guide block. A flow distribution hole is arranged inside the drill rod, and a flow guide hole is arranged inside the flow guide block. One end of the flow guide hole is used as a jet port, and the other end of the flow guide hole is used as a connection port. The flow guide block is fixedly connected to the outer surface of the drill rod, and the normal direction of the jet port is tangent to the circumferential direction of the drill rod. The connection port is communicated with the flow distribution hole.

[0007] A cutting edge is further arranged on the outer surface of the drill rod, and the flow guide block is fixedly connected between two adjacent cutting edges.

[0008] The whole flow guide block is in a spiral shape surrounding the outer surface of the drill rod.

[0009] The number of spiral turns of the diversion block around the outer surface of the drill pipe is not less than 0.75 turns.

[0010] The flow distribution holes include axial blind holes and radial blind holes. The axial blind holes communicate with the radial blind holes, and the connection port communicates with the radial blind holes.

[0011] The aperture of the radial blind hole is smaller than that of the axial blind hole, and the number of the radial blind holes is multiple.

[0012] The beneficial effects of the present utility model are as follows: By adopting the technical solution of the present utility model, during the processes of drilling a guiding hole and reaming construction, water can be injected into the flow distribution holes. After the water flows through the flow distribution holes, the flow distribution holes and the diversion holes, it is sprayed into the soil body, infiltrating the solid soil underground, and making the soil mix with water to form soft mud as the drill pipe rotates, so that the drill pipe can be easily pushed forward. This helps to effectively improve the construction efficiency when the output power of the drilling equipment is small. In addition, the water is sprayed into the soil body through the spray port, and the normal direction of the spray port is tangent to the circumferential direction of the drill pipe, which can prevent the infiltrated bentonite from reversely blocking the spray port and keep the drilling rig in a stable and reliable operating state. Description of the Drawings

[0013] Figure 1 is a schematic connection diagram of the drill pipe and the diversion block of the present utility model;

[0014] Figure 2 is an axonometric view of the diversion block of the present utility model;

[0015] Figure 3 is a front view of the diversion block of the present utility model.

[0016] In the figure: 1 - diversion block, 2 - drill pipe, 3 - flow distribution hole, 11 - spray port, 12 - connection port, 21 - cutting edge, 31 - axial blind hole, 32 - radial blind hole. Detailed Embodiments

[0017] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0018] As Figures 1 to 3 shown, the present utility model provides a drilling tool for urban sewage pipeline construction, including a drill pipe 2 and a diversion block 1. A flow distribution hole 3 is provided inside the drill pipe, and a diversion hole is provided inside the diversion block 1. One end of the diversion hole is used as a spray port 11, and the other end of the diversion hole is used as a connection port 12. The diversion block 1 is fixedly connected to the outer surface of the drill pipe 2, and the normal direction of the spray port 11 is tangent to the circumferential direction of the drill pipe 2. The connection port 12 communicates with the flow distribution hole 3.

[0019] Adopting the technical solution of the present utility model, during the processes of drilling the guiding hole and reaming, water can be injected into the flow distribution hole. After the water flows through the flow distribution hole, the flow distribution hole and the diversion hole, it is sprayed into the soil body, soaking the firm underground soil body, and mixing the soil with the water along with the rotational movement of the drill pipe to form soft mud, so that the drill pipe can be easily advanced, which helps to effectively improve the construction efficiency when the output power of the drilling equipment is small. In addition, the water flows through the spray port and is sprayed into the soil body. The normal direction of the spray port is tangent to the circumferential direction of the drill pipe, which can prevent the infiltrated bentonite from blocking the spray port in the reverse direction and keep the drill rig in a stable and reliable operating state.

[0020] Specifically, a cutting edge 21 is further provided on the outer surface of the drill pipe 2, and the diversion block 1 is fixedly connected between two adjacent cutting edges 21. The diversion block 1 is in a spiral shape around the outer surface of the drill pipe 2. The number of spiral turns of the diversion block 1 around the outer surface of the drill pipe 2 is not less than 0.75 turns.

[0021] In addition, the flow distribution hole 3 includes an axial blind hole 31 and a radial blind hole 32. The axial blind hole 31 is communicated with the radial blind hole 32, and the connection port 12 is communicated with the radial blind hole 32. The aperture of the radial blind hole 32 is smaller than that of the axial blind hole 31, and the number of the radial blind holes 32 is multiple.

[0022] When using the drilling tool for urban sewage pipeline construction provided by the present utility model, the construction can be carried out according to the following technological steps:

[0023] Step 1: Excavate earthwork on the ground to obtain a working well and a receiving well;

[0024] Step 2: Provide a drill rig, place the drill rig in the working well, and install the first drilling tool on the drill rig;

[0025] Step 3: Connect the flow distribution hole 3 to a water source, start the drill rig, drill a guiding hole between the working well and the receiver, and then remove the first drilling tool;

[0026] Step 4: Install the second drilling tool on the drill rig;

[0027] Step 5: Provide a unit pipe section, place the unit pipe section in the receiving well, fixedly connect the unit pipe section to the second drilling tool, connect the flow distribution hole 3 to a water source, start the drill rig, expand the aperture of the guiding hole along the axial direction of the guiding hole, and at the same time pull the unit pipe section into the soil body;

[0028] Step 6: Repeat Step 5 several times to connect multiple unit pipe sections end to end.

[0029] Adopting the technical solution of the present utility model, during the processes of drilling the guiding hole and reaming construction, water is injected into the flow distribution hole 3. After the water flow passes through the flow distribution hole 3, the flow distribution hole and the diversion hole, it is sprayed into the soil body, making the solid soil underground become soft under the rotational movement of the drill pipe or the reaming head, so that the drill pipe or the reaming head can be easily advanced. This helps to effectively improve the construction efficiency when the output power of the drilling rig is relatively small. In addition, the water flow is sprayed into the soil body through the spray port, and the normal direction of the spray port is tangent to the circumferential direction of the drill pipe, which can prevent the infiltrated bentonite from blocking the spray port in the reverse direction and keep the drilling rig in a stable and reliable operating state.

[0030] Specifically, the above construction process further includes the following steps: providing a jack and placing the jack in the receiving well. When performing step six, the unit pipe section is also pushed into the soil body by the thrust provided by the jack. A cushion block is also clamped between the jack and the inner wall of the receiving well. The number of jacks is multiple, and the multiple jacks are arranged at equal intervals around the unit pipe section.

[0031] In addition, the number of drill pipes is multiple, and the multiple drill pipes are connected end to end. A booster pump is also connected between the flow distribution hole 3 and the water source. In step five, the speed of pulling the unit pipe section into the soil body does not exceed 2 m / min. Adopting the technical solution of the present utility model, the water pressure is also increased by the booster pump, so that the sludge attached to the surface of the spray port 11 can be washed away and enter the soil body, and then be transformed into bentonite through the rotational movement of the drill pipe or the reaming head, which is beneficial to facilitating the advancement of the drill pipe or the reaming head, reducing the power loss of the equipment output, and improving the construction efficiency.

Claims

1. A drilling tool for urban sewage pipeline construction, characterized in that: The invention comprises a drill rod (2) and a guide block (1), wherein a flow distribution hole (3) is provided in the drill rod, and a flow guide hole is provided in the guide block (1), one end of the flow guide hole is used as an injection port (11), and the other end of the flow guide hole is used as a connection port (12), the guide block (1) is fixedly connected to the outer surface of the drill rod (2), and the normal direction of the injection port (11) is tangent to the circumference of the drill rod (2), and the connection port (12) is connected to the flow distribution hole (3).

2. A drilling tool for urban sewage pipe construction as claimed in claim 1, characterized in that: The outer surface of the drill rod (2) is also provided with a cutting blade (21), and the guide block (1) is fixedly connected between two adjacent cutting blades (21).

3. A drilling tool for urban sewage pipe construction as claimed in claim 2, characterized in that: The guide block (1) as a whole is in a spiral shape surrounding the outer surface of the drill rod (2).

4. A drilling tool for urban sewage pipe construction as claimed in claim 3, characterized in that: The number of spiral turns of the guide block (1) around the outer surface of the drill rod (2) is not less than 0.75 turns.

5. A drilling tool for urban sewage pipe construction as claimed in claim 1, characterized in that: The distribution hole (3) comprises an axial blind hole (31) and a radial blind hole (32); the axial blind hole (31) is in communication with the radial blind hole (32); and the connection port (12) is in communication with the radial blind hole (32).

6. A drilling tool for urban sewage pipe construction as claimed in claim 5, characterized in that: The diameter of the radial blind hole (32) is smaller than the diameter of the axial blind hole (31), and there are multiple radial blind holes (32).

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