Slag salvaging drill bit

Abstract

The utility model belongs to the technical field of pile foundation construction equipment, and particularly relates to a slag salvaging drill bit. Comprising a drill bit body, the drill bit body comprises a shell, a cavity is formed in the shell, a slag discharging pipe used for discharging slurry and rock debris is arranged in the cavity in a penetrating mode, and a plurality of transverse rods used for connecting the inner wall of the shell and the slag discharging pipe are further arranged in the cavity; cutting teeth for cutting rocks are arranged on the shell and the cross rod; the slag salvaging structure is arranged in the cavity, the slag salvaging structure comprises a plurality of steel wire ropes used for being connected with the side wall of the shell, the steel wire ropes are connected with the outer side of the slag discharging pipe in an abutting mode, the steel wire ropes are located in the cavity in the inner side of the transverse rod, and a rock inlet allowing rock to enter is formed between every two adjacent steel wire ropes. The cutting teeth are arranged to smash stones, a cage-shaped structure is formed through the steel wire rope, the shell and the baffle, broken stones of different sizes are temporarily stored and limited, and uninterrupted operation is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile foundation construction equipment, and in particular relates to a slag removal drill bit. Background Art

[0002] A rotary drill is a type of construction equipment, generally suitable for artificial backfill and strata containing some pebbles and gravel. Due to its high drilling speed and construction efficiency as well as low impact on the surrounding environment, the rotary drill is a commonly used equipment for handling non-rock strata in bored pile construction. However, it is usually unable to independently handle strata containing a large amount of riprap, pebbles or obstacles. Existing solutions are mostly to combine multiple construction techniques for excavation, such as using a rotary drill combined with an impact drill, a grab drill and other methods to ensure the smooth progress of the project construction.

[0003] In the technical solution of patent CN213807569U, a slag scoop drill is provided, which includes a drill body and a slag scoop structure composed of slag scoop plates of different shapes. By fixing the slag scoop plate inside the drill body, large pieces of rock can be broken and collected to achieve the slag discharge function, and the slag scoop plate assembly is hinged between the drill body and has a certain movable angle range, which can temporarily store rock fragments and avoid certain safety hazards.

[0004] However, this solution can only grind large rocks, which is not conducive to collecting small stones of different sizes, and its actual application scope is narrow. At the same time, the hinged activity range of this patent solution is small, and it is difficult to take the broken stones. A large number of stones and riprap are accumulated at the bottom of the hole, which may affect the construction quality and progress, and is not conducive to actual application and operation. Summary of the invention

[0005] The utility model aims to overcome the difficulty in the prior art in effectively salvaging and removing riprap, pebbles and the like, and provides a slag dredging drill bit to overcome the above defects.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A slag drill bit, comprising:

[0008] The drill bit body comprises a shell, a cavity is arranged inside the shell, a slag discharge pipe for discharging mud and rock cuttings is arranged inside the cavity, a plurality of cross bars for connecting the inner wall of the shell and the slag discharge pipe are arranged inside the cavity, and picks for cutting rocks are arranged on the shell and the cross bars;

[0009] A slag scooping structure is arranged inside the cavity. The slag scooping structure includes a plurality of steel wire ropes for connecting the side walls of the outer shell. The other ends of the steel wire ropes are placed on the outside of the slag discharge pipe. The steel wire ropes are located in the cavity inside the cross bar, and rock entrances for rocks to enter are formed between adjacent steel wire ropes.

[0010] The utility model includes a drill bit body and a slag removal structure. The drill bit body includes an outer shell, which supports and shapes the entire structure. A hollow slag removal pipe is arranged in the cavity, and the mud containing small-sized rock cuttings at the bottom of the hole is extracted through the channel inside the slag removal pipe. The mud can not only cool the drill bit and lubricate the drilling tool, but also bring the small-sized rock and soil particles cut off out of the hole through the rotation of the drill bit to maintain the stability of the hole wall. A cross bar is also arranged in the outer shell to evenly divide the cavity, and picks are arranged on the outer shell and the cross bar to cut the soil layer or rock layer.

[0011] A cavity is provided inside the shell, and a slag scooping structure is provided inside the cavity, so that it can be used to collect broken stones and play a role of temporary storage. The slag scooping structure includes a number of steel wire ropes used to connect the side walls of the shell, and the other ends of the steel wire ropes are placed on the outer wall of the slag discharge pipe, and are not tightly connected, forming a semi-enclosed cage-like structure, which is designed to allow soil and riprap to enter through the opening during the drilling process. The internal space of the cage-like structure inside the cavity is large enough to accommodate a certain amount of riprap, so as to effectively collect and remove the riprap in the hole without interrupting the normal drilling process, thereby increasing the continuity of use of the equipment in actual situations.

[0012] On the one hand, the steel wire rope of the structure is confined to the inside of the crossbar and placed on the outside of the slag discharge pipe. The steel wire rope will not fall off during use, which makes it easy to clean the gravel collected in the cage-like structure and reduces the difficulty of operation. In addition, the gaps in the steel wire rope of the structure allow small stones such as pebbles and riprap to enter directly, and also allow large stones to enter after being broken, which expands the scope of application of the device. On the other hand, the steel wire rope is set inside the crossbar. After the gravel enters the cavity, it is deposited on the steel wire rope due to gravity. Since the steel wire rope cannot actively detach from the crossbar, the gravel cannot leave the cavity, which plays a storage role.

[0013] Preferably, the slag scooping structure further comprises a plurality of fixing rings fixed to the inner wall of the outer shell, and the steel wire rope is fixedly connected to the inner wall of the outer shell via the fixing rings.

[0014] The steel wire rope is fixed to the outer shell through one end of the fixing ring, which can ensure the integrity and stability of the entire drill body and the slag scooping structure, so that the outer shell and the steel wire rope form a semi-enclosed cage structure.

[0015] Preferably, the fixing ring is connected to the inner wall of the outer shell by welding.

[0016] The fixing ring is welded to the inner wall of the shell, which ensures the stability and mechanical strength of the structure, effectively avoids the problem of the fixing ring and the wire rope arranged thereon being separated as the drill body rotates, and improves the safety of the structure during use.

[0017] Preferably, the number of the steel wire ropes is 15-35.

[0018] The number of wire ropes is set to different numbers to determine the size of the rock entrance. The more wire ropes are set, the smaller the rock entrance is, allowing small-diameter rocks to enter; the fewer wire ropes are set, the larger the rock entrance is, allowing large-diameter rocks to enter. Generally, setting 15-35 wire ropes can meet the actual needs of different geological environments, and the wire ropes can be disassembled according to actual needs to increase the scope of application. After long-term use, it is found that in most geological environments, the design of 30 wire ropes is most suitable.

[0019] Preferably, the housing further comprises a baffle plate for closing the cavity, which is arranged at an end away from the cutting teeth.

[0020] The baffle is set to close the cavity structure, which can effectively prevent riprap, pebbles and other gravel from being thrown away during the process and injuring workers, thereby increasing the safety of the entire design structure.

[0021] Preferably, the drill bit body further comprises a stabilizing frame arranged outside the baffle for connecting the baffle and the slag discharge pipe.

[0022] Providing a stabilizing frame to connect the baffle and the slag discharge pipe can further increase the strength of the design, increase stability, increase the force-bearing area between the shell and the slag discharge pipe, avoid the risk of damage during use, and increase service life.

[0023] Preferably, the cutting teeth provided on the drill bit body are made of cemented carbide.

[0024] The pick teeth are made of cemented carbide, which enhances the strength of the pick teeth and enables cutting of most soil or rock layers, thus helping to expand the scope of use.

[0025] Preferably, the pick is a polyhedral prism-shaped structure.

[0026] The pick has a polyhedral prism structure, which enables the pick to have a sharp tip, which is beneficial to speed up the speed of the pick to break stones and improve work efficiency.

[0027] Preferably, an outwardly expanding connecting ring is also provided at the end of the slag discharge pipe.

[0028] An outward expansion structure is arranged at the end of the slag discharge pipe, which facilitates the removal of the entire drill bit structure and is also conducive to the subsequent connection of the slag removal drill bit with other devices.

[0029] Preferably, an internal thread is provided inside the connecting ring.

[0030] The expanded outward-expanding structure is conducive to sleeve connection with other devices, and is connected and fixed by a threaded structure, which is convenient for disassembly and cleaning, and is convenient for transportation, thereby increasing the ease of use of the entire structure.

[0031] Therefore, the utility model has the following beneficial effects:

[0032] (1) The utility model can be used in the process of drilling in deep riprap areas to remove slag while drilling. On the one hand, large stones are broken into small gravel by carbide picks. On the other hand, small stones such as pebbles and riprap are temporarily stored in the cavity through a special cage structure; mud, rock cuttings, etc. are discharged through the slag discharge pipe. The problem of frequent suspension of work and cleaning of gravel during operation is reduced; at the same time, by setting different numbers of wire ropes, the size limit of stones in the riprap process is effectively solved, and the scope of application is increased;

[0033] (2) The utility model enhances the mechanical strength and stability of the entire device through the stabilizing frame, which helps to increase the service life of the device, reduce the risk of damage during use, and also increase safety;

[0034] (3) The utility model closes the cavity structure through the baffle, effectively avoiding the problem of stone splashing, reducing the risk of stones being thrown out during the operation of the device, and increasing safety during use;

[0035] (4) The utility model has simple operation and clear structure, which is conducive to application and promotion in actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is the overall structure diagram of the slag drill bit.

[0037] Figure 2 This is a diagram of a rotary drill bit.

[0038] Figure 3 The drill bit is shown in side view.

[0039] Figure 4 Top view of the drill bit.

[0040] Figure 5 This is an oblique view of the drill bit.

[0041] Explanation of the reference numerals in the figure: drill bit structure 10; housing 11; cross bar 12; pick 13; slag discharge pipe 14; cavity 15; connecting ring 16; slag scooping structure 20; wire rope 21; fixing ring 22; rock inlet 23. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with specific embodiments. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following description are generally only embodiments of a part of the present invention, rather than all embodiments. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work should fall within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 1-5 As shown, this embodiment provides a slag scooping drill bit, which can be divided into a drill bit body 10 and a slag scooping structure 20.

[0045] The drill body 10 comprises a housing 11, and a cavity 15 is arranged inside the housing, which can be effectively used as a place for temporarily storing crushed stones, pebbles, riprap and the like.

[0046] In order to discharge mud, rock cuttings, etc. synchronously during the drilling process without affecting the subsequent drilling, this embodiment is provided with a slag discharge pipe 14 in the cavity 15. During the drilling process, the mud pump is turned on synchronously, and the rock cuttings at the bottom of the hole are extracted through the slag discharge pipe by using the suction of the pump. The mud can not only cool the drill bit and lubricate the drilling tool, but also bring the cut rock and soil particles out of the hole through the rotation of the drill bit to maintain the stability of the device. A number of cross bars 12 are arranged in the cavity 15, and picks 13 are arranged on the outer shell 11 and the cross bars 12 for cutting soil or rock layers.

[0047] For small pebbles, riprap and other gravels, generally only a combined device can be used. The slag scooping structure 20 described in the present application is set in the cavity 15, and includes a wire rope 21 connected to the slag discharge pipe 14 through a fixed ring 22. The other end of the wire rope 21 is placed on the outside of the slag discharge pipe 14. The cage-like structure formed by the wire rope 21 and the cavity 15 is used to collect pebbles, riprap, etc., avoiding the problem of frequent suspension of operations during drilling. Rocks enter through the rock entrance 23 formed between adjacent wire ropes 21.

[0048] On the basis of the above-mentioned embodiment, the drill body 10 is further optimized in design.

[0049] In order to avoid splashing of collected stones, the present design sets a baffle 18 at the end of the housing 11 away from the pick 13, which is connected to the slag scoop pipe 14. The baffle 18, the wire rope 21 and the housing 11 together form a semi-enclosed cage structure, and the crushed stones are limited and stored in it after entering, which increases the safety of the structure, reduces the frequency of cleaning and crushing the stones of the device, and can operate continuously.

[0050] On the basis of the above-mentioned embodiment, the material and shape of the pick 13 are further optimized.

[0051] The pick 13 is made of hard alloy, which increases the strength of the pick 13, so that it can cut most stones, reduce the number of equipment replacements, and has a wider range of applications. In addition, the hard alloy pick 13 adopts a multi-faceted prism structure, and the pointed tip can cut the target faster, increasing work efficiency.

[0052] On the basis of the above embodiments, in order to enhance the mechanical strength and stability of the entire device, the drill body 10 is further optimized in design.

[0053] In this embodiment, a stabilizing frame 17 is provided outside the baffle to connect the baffle 18 and the slag removal pipe 14. This design is conducive to increasing the force bearing area of ​​the slag removal pipe 14 and the baffle 18, and avoiding the problem of unstable connection between the slag removal pipe 14 and the baffle 18 during use. Based on the above embodiment, the design is further optimized, and this embodiment provides a slag removal drill bit.

[0054] On the basis of the above-mentioned embodiment, in order to connect other subsequent devices, the drill body 10 is further optimized in design.

[0055] This embodiment is provided with a slag discharge pipe 14, and the rear end of the slag discharge pipe is provided with an expandable connecting ring 16, through which other subsequent devices can be connected. At the same time, the inner thread 19 is provided inside the connecting ring 18, which is convenient for disassembly and helps the transportation of the structure.

[0056] The specific use process of the embodiment is as follows:

[0057] The device is connected, placed on the ground where the operation is required, and turned on. When the power device drives the drill rod to rotate, the drill bit body 10 connected to the end of the drill rod also rotates at high speed, and the soil layer or rock layer is cut by the carbide pick 13 on the drill bit body 10. While rotating, the drill bit generates an extrusion force on the surrounding soil, causing cracks in the soil layer or rock layer and further crushing. During the drilling process, the mud pump is turned on synchronously, and the rock cuttings at the bottom of the hole are extracted through the slag discharge pipe 14 by the suction of the pump. While rotating, for large stones, the pick 13 cuts them into small gravel, and the gravel, riprap and pebbles are rolled into a semi-enclosed cage structure composed of a wire rope 21, a housing 11, and a baffle 18. Its design allows soil and riprap to enter through the opening during the drilling process, and the internal space of the cage structure is large enough to accommodate a certain amount of riprap. The wire rope 21 is arranged inside the cross bar 12, and after the gravel enters the cavity 15, it is deposited on the wire rope 21 due to gravity. Since the wire rope 21 cannot be actively separated from the cross bar 12, the crushed stones cannot leave the cavity 15, and thus play a storage role. When the drill body 10 is lifted, the special design of the cage structure makes the riprap enclosed inside the structure and cannot flow out with the mud. After the drill body 10 is lifted to the ground, the operator can open the cage structure, or unload it from the subsequent device through the expansion connection ring 16 at the end of the slag discharge pipe, and then safely unload and remove the collected riprap.

Claims

1. A slag drill bit, characterized in that: include: A drill bit body (10) comprises a shell (11), a cavity (15) is arranged inside the shell (11), a slag discharge pipe (14) for discharging mud and rock cuttings is arranged through the cavity (15), a plurality of cross bars (12) for connecting the inner wall of the shell (11) and the slag discharge pipe (14) are arranged inside the cavity (15), and pick teeth (13) for cutting rocks are arranged on the shell (11) and the cross bars (12); A slag scooping structure (20) is arranged inside the cavity (15), the slag scooping structure (20) comprising a plurality of steel wire ropes (21) connected to the side wall of the outer shell (11), the other ends of the steel wire ropes (21) being placed on the outside of the slag discharge pipe (14), the steel wire ropes (21) being located in the cavity (15) inside the cross bar (12), and rock entrances (23) for rocks to enter are formed between adjacent steel wire ropes (21).

2. A slag drill bit according to claim 1, characterized in that: The slag scooping structure (20) further comprises a plurality of fixing rings (22) fixed to the inner wall of the outer shell (11), and the steel wire rope (21) is fixedly connected to the inner wall of the outer shell (11) via the fixing rings (22).

3. A slag drill bit according to claim 2, characterized in that: The fixing ring (22) is connected to the inner wall of the outer shell (11) by welding.

4. A slag removal drill bit according to claim 1, 2 or 3, characterized in that: The number of the steel wire ropes (21) is 15 to 35.

5. A slag removal drill bit according to claim 1, 2 or 3, characterized in that: The housing (11) further comprises a baffle (18) for closing the cavity (15) provided at an end away from the pick (13).

6. The slag removal drill bit according to claim 5, characterized in that: The drill bit body (10) further comprises a stabilizing frame (17) arranged outside the baffle (18) and used for connecting the baffle (18) and the slag discharge pipe (14).

7. The slag removal drill bit according to claim 1, characterized in that: The cutting teeth (13) arranged on the drill bit body (10) are made of hard alloy.

8. A slag removal drill bit according to claim 1 or 7, characterized in that: The pick (13) is a polyhedral prism-shaped structure.

9. A slag removal drill bit according to claim 1, 2 or 3, characterized in that: The end of the slag discharge pipe (14) is also provided with an outwardly expanded connecting ring (16).

10. The slag removal drill bit according to claim 9, characterized in that: An internal thread (19) is provided inside the connecting ring (16).

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