Stirring drilling tool with injection mechanism and drilling machine

Abstract

The utility model relates to a stirring drilling tool with an injection mechanism and a drilling machine, which comprise a drilling rod, a double-channel unit and the injection mechanism are arranged in the drilling rod, the double-channel unit is arranged along the axial center of the drilling rod, the injection mechanism is arranged at the bottom of the drilling rod and distributed along the radial direction of the drilling rod, and the injection mechanism is communicated with the double-channel unit; the drilling machine comprises a stirring drilling tool, a high-pressure jetting device, a feeding device and an auxiliary pressure device, the high-pressure jetting device is located below the feeding device and communicated with the feeding device, and the high-pressure jetting device achieves gas-solid two-phase fluid mixed compression fluidization and long-distance conveying of curing agent powder supplied by the feeding device through the high-pressure gas jetting technology. The auxiliary pressure device comprises a high-pressure pump and a high-pressure pipe, and the high-pressure pump is communicated with the high-pressure spray pipe through the high-pressure pipe; in order to reduce the spraying resistance of a gas material spraying beam, the spraying radius is increased, and the pollution of a curing agent dry powder material to a construction site can be greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of soft soil foundation dry jetting mixing pile construction machinery and equipment, in particular to a mixing drill tool and a drilling machine with a jetting mechanism. Background Art

[0002] Soft soil foundations are widely distributed in my country, especially in the areas of sea, lakes and rivers, where the foundation soil has a high moisture content, a large void ratio and high compressibility. For this type of soft soil foundation, land development requires a large number of soft soil foundation treatment projects. In the 1960s, Sweden successfully developed dry spraying mixing pile technology, which used dry powder materials such as lime or cement to reinforce saturated soft soil or silt foundations. This technology, with its dual technical functions of water absorption and solidification, can greatly improve the strength and bearing capacity of the reinforced foundation. The application of dry spraying mixing pile technology in civil engineering projects can achieve good soft foundation reinforcement treatment effects. However, the existing construction background of dry spraying mixing piles mainly uses manually controlled pressure tanks, general ejectors and feed pipeline equipment. During the construction process, powder feeding and ejector operation are both manual and completely based on workers' experience. Due to the differences in the skill level and proficiency of construction workers, the powder feeding and injection delivery often become non-uniform and unstable, which is particularly prone to blockage of the delivery pipeline of the solidifying material, resulting in discontinuity in the feeding, injection and delivery of the curing agent powder in the dry spraying mixing pile construction, uneven and unstable curing agent injection amount at the bottom nozzle of the construction drill, and difficulty in ensuring the construction quality of the mixing pile. The main reason for the above technical defects is that the gas-solid two-phase fluid input into the feed channel of the drill has a low flow rate and low pressure, which cannot balance the lateral soil pressure of the deep formation, resulting in the injection speed and pressure of the injection mechanism at the bottom of the mixing drill being too small, limiting the injection distance of the curing agent powder, and failing to meet the requirements of the designed pile diameter, which seriously affects the construction quality of the dry spraying mixing pile. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a stirring drill tool and a drilling machine with a jetting mechanism.

[0004] The purpose of the utility model is achieved through the following technical scheme. The stirring drill with an injection mechanism comprises a drill rod, a dual-channel unit and an injection mechanism are arranged in the drill rod, the dual-channel unit is arranged along the axial center of the drill rod, the injection mechanism is arranged on the bottom of the drill rod and distributed along the radial direction of the drill rod, the injection mechanism is connected to the dual-channel unit and laterally injects a mixed flow of high-pressure gas and curing agent powder and injects a high-pressure water flow beam or a high-pressure air flow beam.

[0005] Preferably, the dual-channel unit includes a feed channel and a high-pressure channel, the feed channel serves as a conveying channel for gas-solid two-phase flow, and the high-pressure channel serves as a conveying channel for high-pressure water flow or high-pressure air flow, and the feed channel and the high-pressure channel are arranged in parallel along the axial direction of the drill pipe.

[0006] Preferably, the injection mechanism includes an air material nozzle and a high-pressure nozzle, the air material nozzle is connected to the feed channel and laterally injects a mixed flow of high-pressure gas and curing agent powder, and the high-pressure nozzle is connected to the high-pressure channel and laterally injects a high-pressure water flow or a high-pressure air flow.

[0007] Preferably, the high-pressure nozzle is located above or below or at the same depth as the gas nozzle.

[0008] Preferably, the nozzle of the high-pressure nozzle can be a conical nozzle or an annular nozzle.

[0009] Preferably, the conical nozzle can spray a high-pressure water jet or a high-pressure air jet horizontally or obliquely downward.

[0010] Preferably, the annular nozzle is arranged at the outer circumference of the gas material nozzle and can spray a high-pressure water flow beam or a high-pressure air flow beam in a horizontal direction along the circumference of the gas material spray beam.

[0011] A drilling rig with a stirring drill tool with an injection mechanism, comprising the stirring drill tool, a high-pressure injection device, a feeding device and an auxiliary pressure device as described above, wherein the high-pressure injection device is located below and connected to the feeding device, and the high-pressure injection device utilizes high-pressure gas injection technology to achieve mixed compression fluidization and long-distance transportation of gas-solid two-phase fluids for the curing agent powder supplied by the feeding device, and is connected to the feeding channel through an air material conveying pipe, and the auxiliary pressure device comprises a high-pressure pump and a high-pressure pipe, and the high-pressure pump is connected to the high-pressure nozzle through the high-pressure pipe.

[0012] The beneficial effects of the utility model are as follows: in order to reduce the injection resistance of the gas injection beam, the injection radius is increased, and the pollution of the dry powder of the curing agent to the air above the construction site can be greatly reduced; at the same time, the high-pressure injection device can efficiently and quantitatively feed materials, increase the construction diameter of the mixing pile, improve the construction quality of the mixing pile, shorten the construction time and reduce environmental pollution. In addition, it also reduces the project cost, improves the market competitiveness of the dry-spraying and wet-spraying mixing pile technologies and expands the engineering application scope of the mixing piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the structure of a stirring drill with a jet mechanism.

[0014] Figure 2It is a schematic diagram of various spray pipes and nozzle structures of the spray mechanism of the utility model.

[0015] Figure 3 It is a structural schematic diagram of a drilling rig of the utility model.

[0016] The numbers in the accompanying drawings are respectively: 6, high-pressure injection device; 8, feeding device; 9, gas material conveying pipe; 10, drill pipe; 101, dual-channel unit; 102, feed channel; 103, injection mechanism; 104, high-pressure channel; 105, gas material nozzle; 106, high-pressure nozzle; 107, conical nozzle; 108, annular nozzle; 109, high-pressure pump; 110, high-pressure pipe. DETAILED DESCRIPTION

[0017] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figures 1 to 3 As shown, the utility model includes a drill rod 10, in which a dual-channel unit 101 and an injection mechanism 103 are provided. The dual-channel unit 101 is arranged along the axial center of the drill rod 10, and the injection mechanism 103 is arranged on the bottom of the drill rod 10 and distributed along the radial direction of the drill rod 10. The injection mechanism 103 is connected to the dual-channel unit 101 and laterally injects a mixed flow of high-pressure gas and curing agent powder and injects a high-pressure water flow beam or a high-pressure air flow beam.

[0018] The dual-channel unit 101 includes a feed channel 102 and a high-pressure channel 104. The feed channel 102 serves as a gas-solid two-phase flow conveying channel, and the high-pressure channel 104 serves as a high-pressure water flow or high-pressure air flow conveying channel. The feed channel 102 and the high-pressure channel 104 are arranged in parallel along the axial direction of the drill pipe 10.

[0019] The injection mechanism 103 includes an air material nozzle 105 and a high-pressure nozzle 106. The air material nozzle 105 is connected to the feed channel 102 and laterally injects a mixed flow of high-pressure gas and curing agent powder. The high-pressure nozzle 106 is connected to the high-pressure channel 104 and laterally injects a high-pressure water flow or a high-pressure air flow.

[0020] The high-pressure nozzle 106 is located above or below the gas nozzle 105 or at the same depth.

[0021] The nozzle of the high-pressure nozzle 106 can be a conical nozzle 107 or an annular nozzle 108 .

[0022] The conical nozzle 107 can spray a high-pressure water jet or a high-pressure air jet horizontally or obliquely downward.

[0023] The annular nozzle 108 is disposed at the outer circumference of the gas material spray pipe 105 and can spray a high-pressure water stream or a high-pressure air stream in a horizontal direction along the circumference of the gas material spray beam.

[0024] The annular nozzle 108 is arranged at the outer circumference of the gas material spray pipe 105 and can spray high-pressure water flow in a horizontal direction along the circumference of the gas material spray beam; in this way, the spraying is more uniform and the construction quality is better.

[0025] A drilling rig with a stirring drill tool with an injection mechanism, comprising a stirring drill tool, a high-pressure injection device 6, a feeding device 8 and an auxiliary pressure device. The high-pressure injection device 6 is located below and connected to the feeding device 8. The high-pressure injection device 6 uses high-pressure gas injection technology to mix, compress, fluidize and transport the curing agent powder supplied by the feeding device 8 into a gas-solid two-phase fluid, and is connected to a feed channel 102 through a gas material conveying pipe 9. The auxiliary pressure device comprises a high-pressure pump 109 and a high-pressure pipe 110. The high-pressure pump 109 is connected to the high-pressure nozzle 106 through the high-pressure pipe 110.

[0026] The mixing drill is provided with a dual-channel structure to serve the wet spraying construction method, and is divided into a feed channel 102 and a high-pressure channel 104. The inner diameter of the feed channel 102 is 40mm-60mm, and it serves as a gas-solid two-phase fluid delivery channel. The inner diameter of the high-pressure channel 104 is 10mm-30mm, and it serves as a high-pressure water flow delivery channel. During the rotary jet mixing construction of the drill, when the injection mechanism 103 at the bottom of the mixing drill laterally sprays a mixed flow of high-pressure gas and curing agent powder through the gas nozzle 105, the high-pressure nozzle 106 is used to laterally spray high-pressure water. The high-pressure nozzle 106 has an inner diameter of 5mm-25mm and is arranged on the gas nozzle. 105 above or below or at the same depth; the conical nozzle 107 of the high-pressure nozzle 106 can spray horizontally or obliquely downward; the high-pressure nozzle 106 can also adopt an annular nozzle 108 with a diameter of 20mm to 60mm, and is arranged on the outer circumference of the gas-material nozzle 105 of the drilling tool. The annular nozzle 108 of the high-pressure nozzle 106 can spray 0.5MPa to 10MPa high-pressure water flow in the horizontal direction along the circumference of the gas-material injection beam; the purpose of applying the tidal spraying technology and related structures is to reduce the injection resistance of the gas-material injection beam, so as to increase the injection radius, and can greatly reduce the pollution of the curing agent dry powder to the air above the construction site.

[0027] In addition, the solidifying materials that can be used by the high-pressure spraying device 6 include: lime, cement, curing agent, fly ash, fine sand and other dry materials; and this direct-injection high-pressure spraying system is suitable for dry spraying and wet spraying construction methods, and the specific curing agent material can be selected according to the engineering requirements and foundation soil conditions.

[0028] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. A drilling rig, characterized in that: The invention comprises a stirring drill, a high-pressure injection device (6), a feeding device (8) and an auxiliary pressure device. The stirring drill is a stirring drill with an injection mechanism, comprising a drill rod (10). A dual-channel unit (101) and an injection mechanism (103) are arranged in the drill rod (10). The dual-channel unit (101) is arranged along the axial center of the drill rod (10). The injection mechanism (103) is arranged on the bottom of the drill rod (10) and distributed along the radial direction of the drill rod (10). The injection mechanism (103) is connected to the dual-channel unit (101) and injects high-pressure gas and curing agent powder in a horizontal direction to mix the gas. The high-pressure injection device (6) is located below and connected to the feeding device (8). The high-pressure injection device (6) uses high-pressure gas injection technology to mix, compress, fluidize and transport the solidifying agent powder supplied by the feeding device (8) into a gas-solid two-phase fluid, and is connected to the feeding channel (102) in the dual-channel unit (101) through a gas-material conveying pipe (9). The auxiliary pressure device includes a high-pressure pump (109) and a high-pressure pipe (110). The high-pressure pump (109) is connected to the high-pressure nozzle (106) through the high-pressure pipe (110).

2. The drilling rig according to claim 1, characterized in that: The dual-channel unit (101) comprises a feed channel (102) and a high-pressure channel (104); the feed channel (102) serves as a gas-solid two-phase flow delivery channel, and the high-pressure channel (104) serves as a high-pressure water flow or high-pressure air flow delivery channel; the feed channel (102) and the high-pressure channel (104) are arranged in parallel along the axial direction of the drill pipe (10).

3. The drilling rig according to claim 2, characterized in that: The injection mechanism (103) comprises an air material nozzle (105) and a high-pressure nozzle (106); the air material nozzle (105) is connected to the feed channel (102) and laterally injects a mixed flow of high-pressure gas and curing agent powder; the high-pressure nozzle (106) is connected to the high-pressure channel (104) and laterally injects a high-pressure water flow or a high-pressure air flow.

4. The drilling machine according to claim 3, characterized in that: The high-pressure nozzle (106) is located above or below or at the same depth as the gas nozzle (105).

5. The drilling machine according to claim 3, characterized in that: The nozzle of the high-pressure nozzle (106) may be a conical nozzle (107) or an annular nozzle (108).

6. The drilling machine according to claim 5, characterized in that: The conical nozzle (107) can spray a high-pressure water jet or a high-pressure air jet horizontally or obliquely downward.

7. The drilling machine according to claim 5, characterized in that: The annular nozzle (108) is arranged at the outer circumference of the gas material spray pipe (105) and can spray a high-pressure water flow beam or a high-pressure air flow beam in a horizontal direction along the circumference of the gas material spray beam.

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