Tool for core drilling and reaming of cast-in-place concrete pile

Abstract

The utility model relates to the technical field of reinforcement of cast-in-place concrete piles, and particularly discloses a tool for core drilling and reaming of cast-in-place concrete piles, which comprises a connecting shaft, a guide drill bit, a rotary agent discharging mechanism, a rotary agent discharging mechanism and a rotary agent discharging mechanism. The rotary agent discharging mechanism is used for inhibiting flying dust generated when the guide drill bit performs core drilling and hole expanding on the cast-in-place pile and is located in the guide drill bit; by means of the positioning guide mechanism, reaming eccentricity is avoided when a guide drill bit conducts core drilling and reaming on a cast-in-place pile, cutting and enlarging are conducted on an original hole wall through the reaming wall breaking mechanism, dust suppressants can be automatically sprayed through the effect of the rotary agent discharging mechanism, raised dust generated during core drilling and reaming is restrained, and the drilling efficiency is improved. And raised dust is prevented from falling into the air along with the wind, so that working of workers is facilitated, and the working efficiency of core drilling and reaming of the cast-in-place pile by the workers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete cast-in-place pile reinforcement, and in particular relates to a tool for core drilling and hole enlarging of concrete cast-in-place piles. Background Art

[0002] A concrete bored pile is a pile made by forming a pile hole in the foundation soil at the construction site through mechanical drilling, steel pipe squeezing or manual excavation, placing a steel cage inside and pouring concrete.

[0003] The reasons for drilling and expanding the core of cast-in-place concrete piles are: the geological environment of the construction site is complex, or the construction process problems lead to defects at the bottom or in the middle of the bored cast-in-place pile after the pile is formed. The defective pile foundation is repaired or reinforced. After the core of the pile body is expanded, it can be reinforced by grouting at the bottom of the pile or driving high-pressure jet piles according to the actual defects of the pile body, so as to better adapt to and support the foundation, increase the contact area between the pile and the soil, thereby improving the friction and end bearing force of the pile, and then enhancing the bearing capacity of the entire pile.

[0004] However, in the prior art, when core drilling and hole expansion are performed on concrete bored piles, dust is easily generated due to the friction between the guide drill bit and the bored pile. The dust is blown into the air by the wind, which is not conducive to the work of the staff. At the same time, due to uneven force on the core sampler or vertical deviation of the drill rod, the pile hole is eccentrically drilled, which correspondingly reduces the success rate and work efficiency of the staff in core drilling and hole expansion. Therefore, a tool for core drilling and hole expansion of concrete bored piles is proposed. Utility Model Content

[0005] The utility model aims to provide a tool for core drilling and hole enlarging of concrete cast-in-place piles to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tool for drilling and expanding a concrete cast-in-place pile core, comprising a connecting shaft and a guide drill bit, one end of the guide drill bit being connected to a threaded shaft, and further comprising:

[0008] A rotating agent discharging mechanism is used to suppress dust generated when the guide drill bit drills and expands the bored pile, the rotating agent discharging mechanism is located inside the guide drill bit, the rotating agent discharging mechanism includes an agent storage chamber opened inside the guide drill bit, the inner wall of the guide drill bit is located at the outer wall of the agent storage chamber and is provided with a plurality of agent discharging holes connected to the agent storage chamber, the inner wall of the guide drill bit is located at the outer wall of the agent discharging hole and is provided with a plurality of agent discharging ports connected to the agent discharging ports, the inner wall of the agent storage chamber is connected with a plurality of tension springs, a sliding rod is fixedly connected between two of the tension springs, the sliding rod is located inside the agent discharging hole, one end of the sliding rod is fixedly connected with a fitting baffle, a limiting slot is opened on the inner wall of one of the agent discharging ports, the limiting slot is fixedly connected with a limiting cross bar, the inner wall of the limiting slot is connected with a reset spring, the outer wall of the limiting cross bar is slidably connected with a limiting slider, the limiting slider and the inner wall of the agent discharging port without the limiting slot are both fixedly connected with an atomizing mesh plate, and the inner wall of the limiting slot is provided with an alarm switch;

[0009] The outer wall of the guide drill bit is connected to a positioning and guiding mechanism for positioning and guiding when drilling and expanding the concrete cast-in-place pile core to ensure that the newly expanded hole is concentric with the original hole. The outer wall of the connecting shaft is connected to a hole expansion and wall breaking mechanism for breaking and drilling the concrete structure of the expanded part of the original drilled hole.

[0010] Preferably, the diameter of the dosage hole is smaller than the diameter of the dosage outlet, and the outer wall diameter of the sliding rod is smaller than the diameter of the dosage hole.

[0011] Preferably, the outer side wall of the limiting sliding block and the inner side wall of the limiting sliding groove are slidably fitted, and the outer side wall of the atomizing mesh plate and the inner side wall of the agent outlet are slidably fitted.

[0012] Preferably, a threaded groove is provided on one side of the connecting shaft, and the threaded shaft connects and fixes the guide drill bit to the connecting shaft via the threaded groove.

[0013] Preferably, one end of the return spring away from the limiting sliding groove is connected to the limiting sliding block, and the return spring is sleeved on the outer wall of the limiting cross bar.

[0014] Preferably, the fitting baffle is fitted to the outer wall of the dosage outlet hole and is located inside the dosage outlet, and the size of the fitting baffle is adapted to the dosage outlet hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Through the action of the rotating agent dispensing mechanism, when the guide drill bit is drilling and expanding the bored pile, the dust suppressant can be automatically sprayed, and the dust generated by the drilling and expanding can be suppressed accordingly. Moreover, through the action of the atomizing screen, the sprayed dust suppressant can be sprayed in an atomized state, thereby increasing the contact area between the dust suppressant and the dust, increasing the dust suppression effect of the dust suppressant, and preventing the dust from being blown into the air by the wind, thereby facilitating the work of the staff and improving the work efficiency of the staff in drilling and expanding the bored pile.

[0017] When the dust suppressant inside the storage chamber is exhausted, the atomizing screen loses the thrust for spraying the dust suppressant. At this time, the sliding position of the atomizing screen due to the centrifugal force contacts and squeezes the alarm switch, causing the alarm switch to sound a squeeze alarm, thereby making it easier for the staff to know the amount of dust suppressant inside the storage chamber and to add dust suppressant.

[0018] By means of the positioning and guiding mechanism, when drilling concrete bored piles, the core drilling of the concrete bored piles can be positioned and guided when expanding the hole, thus avoiding eccentric expansion due to uneven force on the guide drill bit or vertical deviation of the drill rod, thereby ensuring that the newly expanded hole is concentric with the original hole, and by means of the expansion and wall breaking mechanism, when drilling concrete bored piles, the concrete structure of the expanded part of the original drill hole can be broken and drilled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a structural diagram of the utility model in which the connecting shaft and the guide drill bit are separated;

[0021] Figure 3 It is a cross-sectional structural diagram of the utility model;

[0022] Figure 4 For this utility model Figure 3 Enlarged structural diagram of point A.

[0023] In the figure: 1. connecting shaft; 2. guide drill bit; 3. agent storage chamber; 301. agent outlet hole; 302. agent outlet; 303. tension spring; 304. sliding rod; 305. fitting baffle; 306. limiting cross bar; 307. reset spring; 308. limiting slider; 309. atomizing screen; 3010. alarm switch; 4. positioning and guiding mechanism; 5. hole expanding and wall breaking mechanism; 6. threaded shaft. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-4 As shown, a tool for coring and expanding concrete bored piles comprises a connecting shaft 1 and a guide drill bit 2, one side of the guide drill bit 2 is connected to a threaded shaft 6, and also comprises: a rotating agent discharging mechanism for suppressing dust generated when the guide drill bit 2 performs coring and expanding on the bored piles, the rotating agent discharging mechanism is located inside the guide drill bit 2, the rotating agent discharging mechanism comprises an agent storage chamber 3 opened inside the guide drill bit 2, a plurality of agent discharging holes 301 communicating with the agent storage chamber 3 are opened on the outer wall of the agent storage chamber 3 inside the guide drill bit 2, a plurality of agent discharging ports 302 communicating with the agent discharging ports 301 are opened on the outer wall of the agent discharging holes 301 inside the guide drill bit 2, and the inner wall of the agent storage chamber 3 is provided with a plurality of agent discharging ports 302 communicating with the agent discharging ports 301. A plurality of tension springs 303 are connected, a sliding rod 304 is fixedly connected between two tension springs 303, the sliding rod 304 is located inside the agent outlet hole 301, one end of the sliding rod 304 is fixedly connected to a fitting baffle 305, a limiting slide groove is provided on the inner wall of one agent outlet 302, a limiting cross bar 306 is fixedly connected inside the limiting slide groove, a return spring 307 is connected to the inner wall of the limiting slide groove, a limiting slider 308 is slidably connected to the outer wall of the limiting cross bar 306, the limiting slider 308 and the inner wall of the agent outlet 302 without the limiting slide groove are fixedly connected with an atomizing mesh plate 309, and an alarm switch 3010 is provided on the inner wall of the limiting slide groove;

[0026] The utility model further specifically describes that the caliber of the discharge hole 301 is smaller than the caliber of the discharge port 302, and the outer wall diameter of the sliding rod 304 is smaller than the aperture of the discharge hole 301, the fitting baffle 305 fits on the outer wall of the discharge hole 301 and is located inside the discharge port 302, the size of the fitting baffle 305 is adapted to the discharge hole 301, the outer wall of the limiting slider 308 and the inner wall of the limiting slide groove are slidingly fitted, the outer wall of the atomizing mesh plate 309 and the inner wall of the discharge port 302 are slidingly fitted, a threaded groove is provided on one side of the connecting shaft 1, and the threaded shaft 6 connects and fixes the guide drill bit 2 to the connecting shaft 1 through the threaded groove, and the end of the return spring 307 away from the limiting slide groove is connected to the limiting slider 308, and the return spring 307 is sleeved on the outer wall of the limiting cross bar 306;

[0027] As can be seen from the above, when installing the connecting shaft 1 and the guide drill bit 2, the connecting shaft 1 and the guide drill bit 2 can be connected and fixed by correspondingly connecting the threaded shaft 6 with the threaded groove on the connecting shaft 1, and the connecting shaft 1 and the guide drill bit 2 can be disassembled and installed accordingly;

[0028] When the guide drill bit 2 is drilling and expanding the bored pile, centrifugal force can be generated inside the agent storage chamber 3 according to the rotation of the guide drill bit 2, and the sliding rod 304 can drive the fitting baffle 305 to separate from the agent outlet hole 301 accordingly. At this time, the dust suppressant inside the agent storage chamber 3 enters the inside of the agent outlet port 302 through the agent outlet hole 301, and is sprayed to the outside of the guide drill bit 2 through the atomizing mesh plate 309, and the dust generated by the drilling and expanding can be suppressed accordingly. Through the setting of this structure, when the guide drill bit 2 is drilling and expanding the bored pile, the dust suppressant can be automatically sprayed, and the dust generated by the drilling and expanding can be suppressed accordingly. Moreover, through the action of the atomizing mesh plate 309, the sprayed dust suppressant can be sprayed in an atomized state, thereby increasing the contact area between the dust suppressant and the dust, increasing the dust suppression effect of the dust suppressant, and preventing the dust from being blown into the air by the wind, thereby facilitating the work of the staff and improving the work efficiency of the staff in drilling and expanding the bored pile.

[0029] According to the action of centrifugal force, the atomizing screen plate 309 can slide according to the action of the limit slider 308. In addition, the force of the dust suppressant spraying increases the extension length of the atomizing screen plate 309, and accordingly the atomizing screen plate 309 quickly slides away from the alarm switch 3010. When the dust suppressant in the storage chamber 3 is exhausted, the atomizing screen plate 309 loses the thrust of the dust suppressant spraying. At this time, the sliding position of the atomizing screen plate 309 under the centrifugal force contacts and squeezes the alarm switch 3010, which can make the alarm switch 3010 perform a squeezing alarm, so that the staff can know the amount of dust suppressant in the storage chamber 3 and add the dust suppressant.

[0030] It should be noted that: a material inlet hole is opened at the top of the outer wall of the storage chamber 3, and the initial position of the limit slider 308 and the position pushed by the centrifugal force and the spraying of the dust suppressant do not contact the alarm switch 3010. Only when the limit slider 308 is only affected by the centrifugal force, it is squeezed and contacted with the alarm switch 3010, and then an alarm is issued. The alarm effect of the alarm switch 3010 is a prior art, and its working principle will not be described in detail.

[0031] like Figure 1-3 As shown, the outer wall of the guide drill bit 2 is connected with a positioning guide mechanism 4, which is used for positioning and guiding when the concrete pile is drilled and expanded, to ensure that the expanded hole is concentric with the original hole, and the outer wall of the connecting shaft 1 is connected with a hole expansion and wall breaking mechanism 5, which is used to break the concrete structure of the expanded part of the original drilled hole;

[0032] Through the function of the positioning and guiding mechanism 4, when drilling a concrete bored pile, the concrete bored pile can be positioned and guided when the core is expanded, so as to avoid eccentric expansion of the hole due to uneven force on the guide drill bit 2 or vertical deviation of the drill rod, and ensure that the expanded hole is concentric with the original hole. In addition, by utilizing the function of the hole expansion and wall breaking mechanism 5, when drilling a concrete bored pile, the concrete structure of the expanded part of the original drill hole can be broken and drilled;

[0033] It should be noted that the hole-expanding and wall-breaking mechanism 5 is composed of four long wings, and the wing ends are welded with special materials to make them sharp and wear-resistant.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tool for core drilling and hole enlarging of concrete cast-in-place piles, characterized in that: The invention comprises a connecting shaft (1) and a guide drill bit (2), one side of the guide drill bit (2) being connected to a threaded shaft (6), and further comprises: A rotating agent discharging mechanism is used to suppress dust generated when a guide drill bit (2) drills and expands a bored pile, the rotating agent discharging mechanism is located inside the guide drill bit (2), the rotating agent discharging mechanism comprises an agent storage chamber (3) opened inside the guide drill bit (2), a plurality of agent discharging holes (301) in communication with the agent storage chamber (3) are opened on the outer wall of the agent discharging hole (301) inside the guide drill bit (2), a plurality of agent discharging ports (302) in communication with the agent discharging hole (301) are opened on the outer wall of the agent discharging hole (301) inside the guide drill bit (2), a plurality of tension springs (303) are connected to the inner wall of the agent storage chamber (3), two of the tension springs (303) are fixedly connected to each other. A sliding rod (304) is provided, the sliding rod (304) is located inside the agent outlet (301), one end of the sliding rod (304) is fixedly connected to a fitting baffle (305), a limiting sliding groove is provided on the inner wall of one of the agent outlets (302), a limiting cross bar (306) is fixedly connected inside the limiting sliding groove, a return spring (307) is connected to the inner wall of the limiting sliding groove, the outer wall of the limiting cross bar (306) is slidably connected to a limiting slider (308), the limiting slider (308) and the inner wall of the agent outlet (302) without the limiting sliding groove are both fixedly connected to an atomizing mesh plate (309), and an alarm switch (3010) is provided on the inner wall of the limiting sliding groove; The outer wall of the guide drill bit (2) is connected to a positioning and guiding mechanism (4) for positioning and guiding when drilling and expanding the concrete cast-in-place pile core, thereby ensuring that the newly expanded hole is concentric with the original hole. The outer wall of the connecting shaft (1) is connected to a hole expansion and wall breaking mechanism (5) for breaking and drilling the concrete structure of the expanded part of the original drill hole.

2. A tool for core drilling and hole enlarging of concrete cast-in-place piles according to claim 1, characterized in that: The diameter of the drug outlet hole (301) is smaller than the diameter of the drug outlet port (302), and the outer wall diameter of the sliding rod (304) is smaller than the diameter of the drug outlet hole (301).

3. A tool for core drilling and hole enlarging of concrete cast-in-place piles according to claim 1, characterized in that: The outer wall of the limiting sliding block (308) and the inner wall of the limiting sliding groove are slidably fitted, and the outer wall of the atomizing mesh plate (309) and the inner wall of the agent outlet (302) are slidably fitted.

4. A tool for core drilling and hole enlarging of concrete cast-in-place piles according to claim 1, characterized in that: A threaded groove is provided on one side of the connecting shaft (1), and the threaded shaft (6) connects and fixes the guide drill bit (2) and the connecting shaft (1) via the threaded groove.

5. A tool for core drilling and hole enlarging of concrete cast-in-place piles according to claim 1, characterized in that: One end of the return spring (307) away from the limiting sliding groove is connected to the limiting sliding block (308), and the return spring (307) is sleeved on the outer wall of the limiting cross bar (306).

6. A tool for core drilling and hole enlarging of concrete cast-in-place piles according to claim 1, characterized in that: The fitting baffle (305) fits on the outer wall of the drug outlet hole (301) and is located inside the drug outlet (302). The size of the fitting baffle (305) is adapted to the drug outlet hole (301).

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