CN220247990U

CN220247990U - Annular cutting type pneumatic impact drilling tool

Info

Publication number: CN220247990U
Application number: CN202321848125.0U
Authority: CN
Inventors: 赵鑫宇
Original assignee: Yahe Zhizao Jiangsu Technology Co ltd
Current assignee: Yahe Zhizao Jiangsu Technology Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2023-12-26
Anticipated expiration: 2033-07-14

Abstract

The utility model belongs to the technical field of drilling construction, and discloses a circular cutting type pneumatic impact drilling tool, which comprises an upper cylinder, a middle cylinder and a lower cylinder, wherein the upper cylinder, the middle cylinder and the lower cylinder are connected through flange bolts; the traditional integrated installation scheme of the impacter and the hammer head is improved, the impacter and the hammer head are respectively installed and fixed on the middle cylinder body and the lower cylinder body, so that the impacter and the hammer head are respectively installed, the original mode that the impacter is required to be detached when the hammer head is replaced is changed into the mode that the hammer head is required to be detached, and the hammer head can be replaced only by detaching the transverse pin of the lower cylinder body, and the workload of detaching and replacing the hammer head is reduced. Through changing the structure shape of the hammer head and the hammer handle, the structure strength of the hammer handle and the knocking block is increased, and the risk of breaking the hammer is reduced.

Description

Annular cutting type pneumatic impact drilling tool

Technical Field

The utility model belongs to the technical field of drilling construction, and particularly relates to a circular cutting type pneumatic impact drilling tool.

Background

With the high-speed development of economy in China in recent years, the number of large-scale, super-high-rise and large-span heavy construction projects is gradually increased, and particularly, in recent years, a bay bridge, a super-high-rise building and the like are continuously constructed, the form of a large-pile-diameter deep pile foundation is continuously innovated, and the large-pile-diameter deep pile foundation construction technology has been greatly developed.

The large-caliber down-the-hole hammer drilling construction process is mainly applied to pile foundation construction, solves the industrial problems of low construction efficiency and high drilling tool abrasion of hard rock strata, and has the advantages of low power consumption, low vibration, low weight, low failure rate, high efficiency and the like.

The large-caliber circular cutting down-the-hole hammer consists of a plurality of sub-impactors and sub-hammerheads, wherein the sub-hammerheads are main loss components in the actual working process, so that a great amount of time is occupied in the construction process by replacing the sub-hammerheads, the construction efficiency is reduced, and the construction cost is increased.

Disclosure of Invention

The utility model aims at solving the problems, and provides a circular cutting type pneumatic impact drilling tool which has the advantage of workload of disassembling and replacing hammerheads.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the annular cutting type pneumatic impact drilling tool comprises an upper cylinder body, a middle cylinder body and a lower cylinder body, wherein the upper cylinder body, the middle cylinder body and the lower cylinder body are connected through flange bolts, one end, far away from the middle cylinder body, of the upper cylinder body is connected with a rotary drilling rod, a high-pressure air pipe connector is arranged on the upper cylinder body, and the interior of the upper cylinder body is hollow;

the middle cylinder body is internally connected with a plurality of impactors, one end of each impactor is communicated with a high-pressure air pipe, a piston is arranged in the impactors in a sliding manner, and the lower end face of each impactor is level with the lower end of the middle cylinder body;

the lower cylinder body is internally provided with a plurality of hammers in a sliding manner, the number of the hammers is the same as that of the impactors, and the movement of the piston can be in conflict with the hammers and drive the hammers to move.

Specifically, the hammer head comprises a hammer handle, a striking surface is connected and arranged at one end of the hammer handle, a striking block is fixedly arranged at one end of the hammer handle away from the striking surface, and crushing teeth are connected and arranged at one end of the striking block away from the hammer handle.

Specifically, the one end that strikes the piece and keep away from the hammer handle is equipped with plane portion, broken tooth distributes on the plane portion.

In particular, the crushing teeth are composed of an alloy material.

Specifically, a slag discharging groove is formed in the plane portion.

Specifically, the upper end face of the hammer head is flush with the upper end face of the lower cylinder, and the shape of the hammer handle is consistent with the shape of the guide groove of the lower cylinder.

Specifically, the crushing teeth comprise cylindrical sections and spherical sections, the cylindrical sections are embedded into the knocking blocks, and the spherical sections are located on the surfaces of the knocking blocks.

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

according to the utility model, the traditional integrated installation scheme of the impactor and the hammer head is improved, and the impactor and the hammer head are respectively installed and fixed on the middle cylinder body and the lower cylinder body, so that the respective installation of the impactor and the hammer head is realized, the mode that the impactor is required to be detached when the hammer head is replaced originally is changed into the mode that only the transverse pin of the cylinder body is detached, the hammer head can be replaced, the workload of detaching and replacing the hammer head is reduced, and the structural strength of the hammer handle and the knocking block is increased and the risk of breaking the hammer is reduced by changing the structural shape of the hammer handle of the hammer head.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a cylinder structure according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the lower cylinder structure of the present utility model;

FIG. 4 is a schematic view of the impactor according to the present utility model;

FIG. 5 is a cross-sectional view of the barrel and lower barrel in an embodiment of the present utility model;

FIG. 6 is a schematic view of a hammer head according to a first embodiment of the present utility model;

FIG. 7 is a schematic diagram of the end face structure of a hammer head according to the first embodiment of the present utility model;

FIG. 8 is a schematic diagram of a hammer head according to a second embodiment of the present utility model;

FIG. 9 is a schematic diagram of the gas flow during operation of the present utility model.

Description of the drawings: 1. an upper cylinder; 2. a middle cylinder; 21. a connecting cap; 22. an impactor; 221. a piston; 3. a lower cylinder; 32. a hammer head; 321. a striking face; 322. a hammer handle; 323. knocking the block; 3231. a slag discharge groove; 3234. a planar portion; 324. crushing teeth.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-7 and 9, the circular cutting type pneumatic impact drilling tool comprises an upper cylinder 1, a middle cylinder 2 and a lower cylinder 3, wherein the upper cylinder 1 and the middle cylinder 2 are connected through flange bolts, the upper end of the upper cylinder 1 is connected with a rotary drilling rod and is provided with a high-pressure air pipe interface, the lower end of the upper cylinder 1 is connected with the middle cylinder 2 through bolts, the middle cylinder 2 and the lower cylinder 3 are connected through flange bolts, the middle cylinder 2 is provided with a plurality of impactors 22, pistons 221 are arranged in the impactors 22, the pistons 221 reciprocate up and down in the impactors 22 by utilizing high-pressure air, and work is done by striking hammerheads 32 of the lower cylinder 3, so that the purpose of breaking rocks is achieved.

The upper end of the impactor 22 is transversely penetrated and pinned by a connecting cap 21, and the lower end of the impactor 22 is flush with the lower end of the middle cylinder 2. The lower cylinder body 3 is provided with a plurality of hammer heads 32, two lateral pins are arranged on two sides of each hammer head 32, the upper end of each hammer head 32 is provided with a striking surface 321, the striking surface 321 is cylindrical and higher than the hammer handle 322, so that when the piston 221 moves the hammer heads 32, the piston 221 can fully act on the striking surface 321 and cannot contact and collide with the hammer handle 322.

The upper end face of the hammer head 32 is flush with the upper end face of the lower cylinder body 3, the shape of the hammer handle 322 is consistent with that of the guide groove of the lower cylinder body 3, the lower end of the hammer head 32 is provided with a knocking block 323, the knocking block 323 is inlaid with a plurality of crushing teeth 324, the shape of the end face of the knocking block 323 is of a quadrilateral structure, and meanwhile, the shape of the hammer handle 322 is identical with that of the knocking block 323.

The knocking block 323 end face comprises a plane portion 3234 and an inclined portion, wherein the crushing teeth 324 are equidistantly distributed on the plane portion 3234, the crushing teeth 324 comprise a cylindrical section and a spherical section, the cylindrical section is embedded in the knocking block 323, and the spherical section is located on the surface of the knocking block 323. The end face of the knocking block 323 is provided with two reverse slag discharging grooves 3231.

Initially, the high pressure air tube is not vented and the hammer head 32 is not in contact with the piston 221.

During operation, after the lower cylinder 3 is abutted against the rock, the drilling tool cannot realize tunneling of drilling at the moment, and then gas is introduced through the high-pressure gas pipe, so that the gas enters the impactor 22 after passing through the upper cylinder 1, the piston 221 is driven to move towards one end close to the hammer head 32 in the impactor 22, the piston 221 is abutted against the striking surface 321, the striking surface 321 is driven to drive the hammer handle 322 to move, the striking block 323 is driven to move, finally, the breaking teeth 324 are in contact with the rock, the breaking of the rock is realized, meanwhile, the broken stone is cleaned through the slag discharging groove 3231 in the breaking process of the breaking teeth 324, and meanwhile, after the breaking teeth 324 are broken, the piston 221 is reset in the impactor 22, and the high-pressure gas is waited to drive the secondary movement of the piston 221, so that the rock is reciprocally struck.

Meanwhile, the hammer heads 32 are in abutting connection with the impacter 22, so that when the hammer heads 32 are required to be replaced, only the hammer heads 32 are required to be disassembled, the impacter 22 is not disassembled, the speed of the impact drilling tool in the maintenance process is improved, and the time consumed in the maintenance process is reduced.

Example 2

Based on the above embodiment 1, since the hammerhead 32 is in use, due to the different rock stratum structure types, and further the single hammerhead 32 shape cannot meet the knocking requirements for different rock strata, eventually the hammerhead 32 will wear and aggravate in the working process, the service life of the hammerhead 32 will be affected, and the use of the impact drilling tool will not be utilized, and the following technical scheme is proposed to solve the above problems.

As shown in fig. 8, the square hammer 32 is replaced by a round hammer 32, the lower cylinder 3 is provided with a plurality of round hammers 32, the round hammers 32 comprise a knocking block 323, the lower end surface of the knocking block 323 comprises a plane portion 3234 and an inclined portion, the lower end surface of the knocking block 323 is round, a plurality of breaking teeth 324 are inlaid on the lower end surface of the knocking block 323, a hammer handle 322 is cylindrical, the shape of the hammer handle is consistent with that of a guide groove of the lower cylinder 3, the upper end surface of the hammer handle 322 is a striking surface 321, the striking surface 321 is in contact with a piston 221, and the piston 221 transmits impact energy to the hammers 32 to break rock.

Meanwhile, the shape of the hammer head 32 includes, but is not limited to, a circular and square structure.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a circular cutting type pneumatic impact drilling tool, includes barrel, well barrel and lower barrel, go up through flange bolted connection between barrel, well barrel and the lower barrel, its characterized in that: one end of the upper cylinder, which is far away from the middle cylinder, is connected with a rotary drilling rod, a high-pressure air pipe connector is arranged on the upper cylinder, and the interior of the upper cylinder is hollow;

2. The circular cutting pneumatic percussion drill according to claim 1, wherein: the hammer head comprises a hammer handle, one end of the hammer handle is connected with a striking surface, one end of the hammer handle, which is far away from the striking surface, is fixedly provided with a striking block, and one end of the striking block, which is far away from the hammer handle, is connected with crushing teeth.

3. The circular cutting pneumatic percussion drill according to claim 2, wherein: the knocking block is provided with a plane part at one end far away from the hammer handle, and the crushing teeth are distributed on the plane part.

4. The circular cutting pneumatic percussion drill according to claim 2, wherein: the crushing teeth are composed of an alloy material.

5. A circular cutting pneumatic percussion drill according to claim 3, wherein: the plane part is provided with a slag discharging groove.

6. A circular cutting pneumatic percussion drill according to claim 3, wherein: the upper end face of the hammer head is flush with the upper end face of the lower cylinder body, and the shape of the hammer handle is consistent with the shape of the guide groove of the lower cylinder body.

7. The circular cutting pneumatic percussion drill according to claim 4, wherein: the crushing teeth comprise cylindrical sections and spherical sections, the cylindrical sections are embedded into the knocking blocks, and the spherical sections are located on the surfaces of the knocking blocks.

8. The circular cutting pneumatic percussion drill according to claim 1, wherein: one end of the impactor, which is close to the upper cylinder body, is connected with a connecting cap.