High-pressure jet grouting pile construction drill bit
By designing a high-pressure rotary spray pile construction drill bit, using auger blades and rotary spray mechanism to provide high-pressure water flow for all-round punching soil, the problems of pile diameter reduction and low drilling efficiency in traditional rotary spray pile construction are solved, and high efficiency is achieved , stable drilling process reduces construction costs and improves project quality.
Patent Information
- Application Number
- CN202421389919.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In the construction of traditional rotary spray piles, the drill bit is prone to face the problem of pile diameter shrinkage during the drilling process, especially in weak formations, which affects the bearing capacity and the safety and durability of the engineering structure. At the same time, traditional drill bits are difficult to effectively deal with complex and changeable geological conditions, resulting in low drilling efficiency, long time and high construction costs.
Design a high-pressure rotary spray pile construction drill bit, adopting a structure that combines the drill body, auger blade and rotary spray mechanism, and provides high-pressure water flow through the combination of a micro-pressure pump, liquid inlet pipe, liquid outlet pipe and pressure pipe The staggered arrangement of the top-view nozzle, horizontal nozzle and upward-view nozzle achieves all-round punching and cutting of soil.
By cutting soil in all directions, the problem of pile diameter reduction is avoided, the soil crushing capacity during drilling is enhanced, the smooth progress of drilling is ensured, construction costs are reduced, construction speed and project quality are improved.
Smart Images
Figure CN222457344U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building engineering construction, in particular to a high-pressure rotary jet pile construction drill bit. Background Art
[0002] In traditional jet grouting pile construction, the drill bit often faces the problem of reduced pile diameter during the drilling process. This is mainly because as the drilling depth increases, the soil pressure increases, causing the hole wall to collapse easily, especially in soft strata, where this situation is more serious. The reduced pile diameter not only affects the bearing capacity of the pile, but may also lead to insufficient subsequent concrete pouring, thus affecting the safety and durability of the overall engineering structure.
[0003] In addition, traditional drill bit designs often cannot effectively cope with complex and changeable geological conditions. For example, when encountering hard rock or dense soil layers, the drilling efficiency is low and the drilling time is long, which increases the construction cost and time. Therefore, we proposed a high-pressure jet grouting pile construction drill bit. Utility Model Content
[0004] The main purpose of the utility model is to provide a high-pressure rotary jet pile construction drill bit, which can effectively solve the problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A high-pressure rotary jet pile construction drill bit comprises a drill body, a drill body is integrally formed at the lower end of the drill body, a connecting shaft is integrally formed at the upper end of the drill body, and the connecting shaft, the drill body and the drill body are coaxially arranged, a spiral drill blade is arranged at the lower part of the outer surface of the drill body, and a rotary jet mechanism is arranged inside the drill body;
[0007] The rotary spraying mechanism includes a micro-boosting pump and a boosting pipe. The micro-boosting pump is fixedly installed on the upper part of the drill body. The input end of the micro-boosting pump is fixedly installed with a liquid inlet pipe. The upper end of the liquid inlet pipe passes through the upper end of the drill body and extends to the outside of the drill body. The output end of the micro-boosting pump is fixedly installed with a liquid outlet pipe. The boosting pipe is coaxially installed in the middle part of the drill body, and the lower end of the liquid outlet pipe is fixedly connected to the inside of the boosting pipe.
[0008] Preferably, the outer surface of the drill body is provided with two groups of nozzle bodies connected with the booster pipe.
[0009] Preferably, the nozzle body includes a downward-looking nozzle, a horizontal nozzle and an upward-looking nozzle, and two of each of the downward-looking nozzle, the horizontal nozzle and the upward-looking nozzle are arranged, and the downward-looking nozzle, the horizontal nozzle and the upward-looking nozzle are staggered in the circumferential direction of the drill body.
[0010] By adopting the above technical solution: the application scope of high-pressure rotary jet grouting piles is greatly improved.
[0011] Preferably, the injection ports of the downward-looking nozzle, the horizontal nozzle and the upward-looking nozzle are located on the same horizontal plane of the drill body.
[0012] By adopting the above technical solution: the coordinated use of the downward-looking sprinkler, the horizontal sprinkler and the upward-looking sprinkler can achieve all-round shearing of the soil.
[0013] Preferably, the angle between the nozzle when viewed from above and the horizontal plane is -25°, and the angle between the nozzle when viewed from above and the horizontal plane is 25°.
[0014] By adopting the above technical solution: high-pressure water flow can cut the soil from different directions, further avoiding the problem of pile diameter reduction, enhancing the soil crushing ability during the drilling process, and ensuring the smooth progress of drilling.
[0015] Preferably, the drill bit body is a diamond drill bit.
[0016] By adopting the above technical solution, the diamond drill bit can avoid the situation where the drill bit body is worn flat or broken when it hits a hard object.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] 1. Use the downward-looking nozzle, horizontal nozzle and upward-looking nozzle to spray high-pressure water flow at angles of 0°, 25° and -25° respectively, so that the high-pressure water flow can cut the soil from different directions, further avoiding the problem of pile diameter reduction, realizing all-round cutting of the soil, enhancing the soil crushing ability during the drilling process, and ensuring the smooth drilling. At the same time, the spiral drill blade rotates together with the drill body, which can effectively support the hole wall, prevent the pile diameter from being reduced due to soil collapse or backfilling, and ensure that the diameter of the pile hole meets the design requirements.
[0019] 2. Through the coordinated use of a micro booster pump, a liquid inlet pipe, a liquid outlet pipe and a booster pipe, the supply of high-pressure water is more stable and reliable, and at the same time, high-pressure water is ejected from the nozzle body. The efficient and stable drilling process reduces the need for re-drilling due to reduced pile diameter, reduces construction costs, and at the same time increases construction speed and shortens project duration. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the overall structure of a high-pressure jet-jet pile construction drill bit of the utility model;
[0021] Figure 2 This is a schematic diagram of the internal structure of a drill body of a high-pressure jet-jet pile construction drill bit of the utility model;
[0022] Figure 3 It is a structural schematic diagram of a rotary jetting mechanism of a high-pressure rotary jetting pile construction drill bit of the utility model;
[0023] Figure 4 The utility model is a schematic structural diagram of a nozzle body of a high-pressure rotary jet pile construction drill bit.
[0024] In the figure: 1. drill body; 2. drill bit body; 3. connecting shaft; 4. rotary spraying mechanism; 5. spiral drill blades; 6. nozzle body; 41. micro booster pump; 42. liquid inlet pipe; 43. liquid outlet pipe; 44. booster pipe; 61. nozzle viewed from above; 62. horizontal nozzle; 63. nozzle viewed from above. DETAILED DESCRIPTION
[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0026] See also Figure 1-4 , the utility model provides a technical solution:
[0027] A high-pressure rotary jet pile construction drill bit comprises a drill body 1, a drill body 2 is integrally formed at the lower end of the drill body 1, a connecting shaft 3 is integrally formed at the upper end of the drill body 1, and the connecting shaft 3, the drill body 2 and the drill body 1 are coaxially arranged, a spiral drill blade 5 is arranged at the lower part of the outer surface of the drill body 1, and a rotary jet mechanism 4 is arranged inside the drill body 1; the drill body 2 is a diamond drill bit.
[0028] In this embodiment, the rotary spray mechanism 4 includes a micro-boosting pump 41 and a boosting pipe 44. The micro-boosting pump 41 is fixedly installed on the upper part of the drill body 1. The input end of the micro-boosting pump 41 is fixedly installed with a liquid inlet pipe 42. The upper end of the liquid inlet pipe 42 passes through the upper end of the drill body 1 and extends to the outside of the drill body 1. The output end of the micro-boosting pump 41 is fixedly installed with a liquid outlet pipe 43. The boosting pipe 44 is coaxially installed in the middle part of the drill body 1, and the lower end of the liquid outlet pipe 43 is fixedly connected to the inside of the boosting pipe 44.
[0029] Through the above scheme: through the coordinated use of the micro-boosting pump 41, the liquid inlet pipe 42, the liquid outlet pipe 43 and the boosting pipe 44, high-pressure water is ejected from the nozzle body 6. The efficient and stable drilling process reduces the need for re-drilling due to the reduction of the pile diameter, reduces the construction cost, and at the same time increases the construction speed and shortens the project period.
[0030] In this embodiment, the outer surface of the drill body 1 is provided with two groups of nozzle bodies 6 connected to the boost pipe 44; the nozzle body 6 includes a downward-looking nozzle 61, a horizontal nozzle 62 and an upward-looking nozzle 63, and there are two downward-looking nozzles 61, horizontal nozzles 62 and upward-looking nozzles 63, and the downward-looking nozzles 61, horizontal nozzles 62 and upward-looking nozzles 63 are all staggered in the circumferential direction of the drill body 1; the injection ports of the downward-looking nozzles 61, horizontal nozzles 62 and upward-looking nozzles 63 are on the same horizontal plane of the drill body 1; the angle between the downward-looking nozzle 61 and the horizontal plane is -25°, and the angle between the upward-looking nozzle 63 and the horizontal plane is 25°.
[0031] Through the above scheme: the spray angles of the downward-looking nozzle 61, the horizontal nozzle 62 and the upward-looking nozzle 63 are in three directions of 0°, 25° and -25°, so that the high-pressure water flow can cut the soil from different directions, further avoiding the problem of pile diameter reduction, achieving all-round cutting of the soil, enhancing the soil crushing ability during the drilling process, and ensuring the smooth progress of the drilling.
[0032] It should be noted that the utility model is a high-pressure rotary jet pile construction drill bit. During use, the entire drill bit is first connected to the driving device through the connecting shaft 3. The drill bit body 2 rotates and digs under the drive force. The spiral drill blade 5 is driven to rotate during the rotation of the drill body 1, which can effectively support the hole wall and prevent the pile diameter from being reduced due to soil collapse or backfilling, thereby ensuring that the diameter of the pile hole meets the design requirements, ensuring the quality and stability of the borehole, and improving the drilling efficiency. During the rotation process, the micro-boosting pump 41, the liquid inlet pipe 42, the liquid outlet pipe 43 and the boosting pipe 44 are used in coordination, so that high-pressure water is ejected from the nozzle body 6. Since the spray angles of the top-view nozzle 61, the horizontal nozzle 62 and the upward-view nozzle 63 are 0°, 25° and -25°, the high-pressure water flow can cut the soil from different directions, further avoiding the problem of pile diameter reduction, improving the drilling efficiency, increasing the construction speed, and shortening the project construction period.
[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A high-pressure jet grouting pile construction drill bit, comprising a drill body (1), characterized in that: The lower end of the drill body (1) is integrally formed with a drill head body (2), the upper end of the drill body (1) is integrally formed with a connecting shaft (3), and the connecting shaft (3), the drill head body (2) and the drill body (1) are coaxially arranged, a spiral drill blade (5) is arranged at the lower part of the outer surface of the drill body (1), and a rotary jet mechanism (4) is arranged inside the drill body (1); The rotary jet mechanism (4) comprises a micro booster pump (41) and a booster pipe (44); the micro booster pump (41) is fixedly mounted on the upper inner portion of the drill body (1); a liquid inlet pipe (42) is fixedly mounted on the input end of the micro booster pump (41); the upper end of the liquid inlet pipe (42) penetrates the upper end of the drill body (1) and extends to the outer side of the drill body (1); a liquid outlet pipe (43) is fixedly mounted on the output end of the micro booster pump (41); the booster pipe (44) is coaxially mounted on the middle inner portion of the drill body (1); and the lower end of the liquid outlet pipe (43) is fixedly connected to the inner portion of the booster pipe (44).
2. A high-pressure jet grouting pile construction drill bit according to claim 1, characterized in that: The outer surface of the drill body (1) is provided with two groups of nozzle bodies (6) which are connected to the boosting pipe (44).
3. A high-pressure jet grouting pile construction drill bit according to claim 2, characterized in that: The nozzle body (6) comprises a downward-looking nozzle (61), a horizontal nozzle (62) and an upward-looking nozzle (63), wherein two of each of the downward-looking nozzle (61), the horizontal nozzle (62) and the upward-looking nozzle (63) are provided, and the downward-looking nozzle (61), the horizontal nozzle (62) and the upward-looking nozzle (63) are staggeredly arranged in the circumferential direction of the drill body (1).
4. A high-pressure jet grouting pile construction drill bit according to claim 3, characterized in that: The spray ports of the downward-looking spray head (61), the horizontal spray head (62) and the upward-looking spray head (63) are located on the same horizontal plane of the drill body (1).
5. A high-pressure jet grouting pile construction drill bit according to claim 3, characterized in that: The included angle between the downward-looking nozzle (61) and the horizontal plane is -25°, and the included angle between the upward-looking nozzle (63) and the horizontal plane is 25°.
6. A high-pressure jet grouting pile construction drill bit according to claim 1, characterized in that: The drill bit body (2) is a diamond drill bit.