Novel energy-saving type drilling mud jacking pipe device

Abstract

The utility model discloses a novel energy-saving type drilling mud jacking pipe device which comprises an outer sleeve and an inner sleeve, the outer sleeve and the inner sleeve are connected through threads, a drilling mechanism is arranged at the end of the inner sleeve, an anti-blocking ball is plugged at the end of the outer sleeve, the drilling mechanism comprises a drill bit, a drill body is provided with spiral threads, insections are chiseled at the protruding position of the spiral threads, and the outer sleeve and the inner sleeve are connected through threads. A drill tooth table is arranged at the front end of the drill bit, a steel protective net is arranged behind the drill tooth table, Y-shaped convex teeth are arranged in the center of the drill tooth table, spherical teeth are arranged around the drill tooth table, and infusion holes are formed in slotting positions of the drill tooth table. According to the utility model, the water consumption in a water pressing link before grouting can be greatly reduced, the stability of slurry concentration is ensured, the construction difficulty is reduced, the whole construction process is simpler and smoother, the combination of slurry and a pile end soil body is tighter, the foundation bearing capacity and the stability of a pile body are effectively improved, and the construction efficiency is improved. And after grouting is completed, the device can be recycled, so that the equipment cost of the post-grouting technology is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pile foundation construction, in particular to a novel energy-saving drilling grouting pipe device. Background Art

[0002] The grouting pipe plays a vital role in the post-grouting technology. It is the core component in the implementation of the grouting technology. Through it, high-pressure grouting is injected into the soil and pile body to fill the pores and cracks, significantly improving the bearing capacity, stability and overall quality of the pile. During the on-site construction process, some construction units only focus on the grouting construction itself, and often ignore the dredging of the grouting channel. They mistakenly believe that as long as the grouting pipe is installed correctly, grouting can be carried out smoothly. In fact, the post-grouting channel includes not only the grouting pipe, but also the concrete cover layer that wraps the outlet of the grouting pipe. If appropriate measures are not taken according to the specific situation, grouting failure is very likely to occur.

[0003] In traditional construction practices, the grouting pipe needs to be pressurized within 24 hours after the concrete pouring of the pile body is completed to ensure that the grouting channel is unobstructed. However, the continuous water flow during this process will cause the mud concentration to decrease. The consistency of the mud is crucial to the construction quality and stability of bored piles. If the mud concentration is too low, its wall protection function will be significantly weakened, thereby increasing the risk of hole wall collapse or borehole instability. In addition, in the design using a straight grouting pipe, the valve pipe and the grouting pipe are connected in a straight line. Given that the bottom of the bored pile hole is conical, when the grouting pipe is fixed on the steel cage and sunk to the bottom of the hole, the valve pipe often cannot extend to the bottom of the hole, but is stuck at the top of the cone. The drilling sediment is mainly deposited in this area. Therefore, this design may lead to unsatisfactory grouting reinforcement effect and cause engineering problems such as excessive pile settlement.

[0004] Therefore, it is very necessary to invent a drillable water-saving device that can reduce water injection before grouting, ensure that the valve pipe extends to the bottom of the hole, and effectively improve the bearing capacity and stability of the pile body. Utility Model Content

[0005] The main purpose of the utility model is to provide a novel energy-saving drilling grouting pipe device, which can effectively solve the problems of complicated construction procedures, mud dilution, and pile body settlement caused by the inability of the valve pipe to extend to the bottom of the hole in the background technology.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new energy-saving drilling grouting pipe device, including an outer casing, an inner casing, a steel protective net, a sealing ball, a drilling mechanism for breaking concrete covering layers and rock and soil bodies, and a drill bit. The outer casing and the inner casing are connected to each other through a threaded bite, the front end of the inner casing is the drilling mechanism, the steel protective net is located behind the drilling mechanism, and the steel protective net is arranged inside the inner casing, and the sealing ball is tightly plugged at the front end of the outer casing.

[0007] As a further solution of the utility model, the drilling mechanism includes a drill bit, the front end of the drill bit is a drill tooth platform, a Y-shaped convex tooth is welded in the center of the drill tooth platform, fixed spherical teeth are welded around the Y-shaped convex tooth, and the groove on the drill tooth platform is an infusion hole.

[0008] As a further solution of the utility model, the drill bit is provided with a spiral pattern, and teeth are chiseled at the protrusions of the spiral pattern and arranged longitudinally along the drill body.

[0009] As a further solution of the utility model, the spherical teeth are fixed to the drill tooth platform outside the Y-shaped convex teeth by welding, and are arranged longitudinally equidistantly on the radius passing through the center of the circle. There are six groups in total, two in each group, and the angle between groups is 60°.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model achieves a telescopic effect by connecting the outer sleeve and the inner sleeve through threaded engagement. When the drill bit and the inner sleeve rotate, relative movement can be generated between the outer sleeve and the drill bit along the path provided by the thread. The drill bit can extend forward to drill through the concrete covering layer of the grouting pipe mouth, and continue to push forward until it is inserted into the soil layer, so as to perform precise grouting and grouting, which can make the slurry and the soil at the pile end more closely combined, and effectively increase the foundation bearing capacity and stability of the pile body. In addition, the water consumption in the water pressure link before grouting can be greatly reduced, ensuring the stability of the mud concentration, reducing the construction difficulty, and making the entire construction process simpler and smoother. After the grouting is completed, the drill bit can be recycled by rotating in the opposite direction, which reduces the equipment cost of the post-grouting technology.

[0012] By setting up a steel guard net and placing it behind the drill bit table, it can be used to prevent broken concrete and rock and soil debris from entering the grouting pipe during drilling and causing blockage, allowing water and mud to flow smoothly into the cracks, thereby improving work efficiency and extending equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a new type of energy-saving drilling grouting pipe device of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the drilling mechanism of the utility model;

[0015] Figure 3 It is a schematic diagram of the internal structure of the steel protective net of the utility model.

[0016] In the figure: 1. outer casing; 2. inner casing; 3. steel protective net; 4. sealing ball; 5. drilling mechanism; 6. drill bit; 7. tooth pattern; 8. drill tooth platform; 9. spherical teeth; 10. Y-shaped convex teeth; 11. infusion hole. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figure 1-3 As shown, a novel energy-saving drilling grouting pipe device includes an outer casing 1, an inner casing 2, a steel protective net 3, a sealing ball 4, a drilling mechanism 5 for breaking concrete covering layers and rock and soil bodies, and a drill bit 6. The outer casing 1 and the inner casing 2 are connected to each other through a threaded engagement, the front end of the inner casing 2 is the drilling mechanism 5, the steel protective net 3 is located behind the drilling mechanism 5, and the steel protective net 3 is arranged inside the inner casing 2, and the sealing ball 4 is tightly plugged at the front end of the outer casing 1.

[0019] In this solution, in order to facilitate drilling, the drilling mechanism 5 includes a drill bit 6, the front end of the drill bit 6 is a drill tooth platform 8, a Y-shaped convex tooth 10 is welded in the center of the drill tooth platform 8, and fixed spherical teeth 9 are welded around the Y-shaped convex tooth 10. The groove on the drill tooth platform 8 is an infusion hole 11.

[0020] In this solution, in order to optimize the rotation speed and cutting angle, the drill bit 6 is provided with a spiral pattern, and teeth 7 are chiseled at the protrusions of the spiral pattern and arranged along the longitudinal direction of the drill body.

[0021] In this solution, in order to improve drilling efficiency, the spherical teeth 9 are fixed to the drill tooth platform 8 outside the Y-shaped convex teeth 10 by welding, and are arranged longitudinally at equal intervals on the radius passing through the center of the circle. There are six groups in total, two in each group, and the angle between groups is 60°.

[0022] It should be noted that the utility model is a novel energy-saving drilling grouting pipe device. When in use, the inner casing 2 is first placed in the outer casing 1 and rotated along the threaded path to fix the inner casing 2 at a certain depth in the outer casing. Then the sealing ball 4 is plugged into the front end of the outer casing 1. The outer casing 1 is tied to the steel cage and then placed into the bottom of the hole. Before post-grouting, the motor is started to make the inner casing 2 drive the drill bit 6 to rotate downward along the threaded path to drill, first break the sealing ball 4 and then drill through the concrete covering layer at the grouting pipe outlet. During this period, appropriate high-pressure water is pressed into the inner casing 2 to prevent broken concrete fragments from entering the grouting pipe and causing blockage. Then the water injection is stopped and cement slurry is pressed in. The pipe is continuously inserted into the soil layer and pushed forward to make the slurry more closely combined with the soil at the pile end. After the grouting is completed, the inner casing 2 can be rotated in the opposite direction to recycle the equipment.

[0023] Furthermore, in order to enable the drill bit 6 to adjust the actual drilling depth and ensure the accuracy of the drilling direction, a thread is provided between the outer casing 1 and the inner casing 2 for bite connection.

[0024] Furthermore, when the drilling mechanism 5 is used, the motor is first turned on to drive the inner casing 2 to drive the drill bit 6 to rotate.

[0025] 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 new type of energy-saving drilling grouting pipe device, characterized in that: The invention comprises an outer sleeve (1), an inner sleeve (2), a steel protective net (3), a blocking ball (4), a drilling mechanism (5) for crushing a concrete covering layer and a rock and soil body, and a drill bit (6); the outer sleeve (1) and the inner sleeve (2) are connected to each other by a threaded engagement; the front end of the inner sleeve (2) is the drilling mechanism (5); the steel protective net (3) is located behind the drilling mechanism (5); the steel protective net (3) is arranged inside the inner sleeve (2); and the blocking ball (4) is tightly plugged at the front end of the outer sleeve (1).

2. A new type of energy-saving drilling grouting pipe device according to claim 1, characterized in that: The drilling mechanism (5) comprises a drill bit (6), the front end of the drill bit (6) is a drill tooth platform (8), a Y-shaped convex tooth (10) is welded at the center of the drill tooth platform (8), fixed spherical teeth (9) are welded around the Y-shaped convex tooth (10), and the groove on the drill tooth platform (8) is an infusion hole (11).

3. A new type of energy-saving drilling grouting pipe device according to claim 2, characterized in that: The drill bit (6) is provided with a spiral pattern, and tooth patterns (7) are chiseled at the protrusions of the spiral pattern and arranged longitudinally along the drill body.

4. A new type of energy-saving drilling grouting pipe device according to claim 2, characterized in that: The spherical teeth (9) are fixed to the drill tooth platform (8) on the periphery of the Y-shaped convex teeth (10) by welding, and are arranged longitudinally at equal intervals on a radius passing through the center of the circle. There are six groups in total, two in each group, and the angle between the groups is 60 degrees.

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