CN115596347A - Down-the-hole hammer - Google Patents
Down-the-hole hammer Download PDFInfo
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- CN115596347A CN115596347A CN202211610175.5A CN202211610175A CN115596347A CN 115596347 A CN115596347 A CN 115596347A CN 202211610175 A CN202211610175 A CN 202211610175A CN 115596347 A CN115596347 A CN 115596347A
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- 238000009826 distribution Methods 0.000 claims abstract description 95
- 230000000903 blocking effect Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application discloses down-the-hole impacter includes: the outer cylinder is of a centrosymmetric structure, and the rear end of the outer cylinder is connected with the joint and the front end of the outer cylinder is connected with the clamping sleeve through threads; the check valve, the gas distribution seat, the piston and the drill bit are sleeved in the outer cylinder and sequentially arranged from the joint to the direction of the clamping sleeve, the drill bit is sleeved in the clamping sleeve, a bushing is further arranged in the outer cylinder and sleeved on the outer side of the drill bit, and the bushing is arranged at the rear end of the clamping sleeve; the first retaining wire and the second retaining wire are symmetrically arranged in the outer cylinder, the first retaining wire is abutted to the front end face of the gas distribution seat, and the second retaining wire is abutted to the rear end face of the bushing. The application provides a down-the-hole impacter compares in prior art, and simple structure can increase the life of outer cylinder, reduces the use cost of down-the-hole impacter.
Description
Technical Field
The application relates to the technical field of impactors, in particular to a down-the-hole impacter.
Background
With the development of industry, various infrastructure projects are continuously promoted. The down-the-hole hammer is widely used as drilling equipment in blasting projects in engineering construction of mines, hydropower stations, ports, roads, tunnels and the like, and is used for excavating blasting drill holes and the like. The pneumatic down-the-hole hammer uses high-pressure air as a power source to drive a piston in the hammer to reciprocate at high speed and high frequency, so that the piston obtains enough energy to impact a drill bit to drill. The impact force acts on the drill bit in the form of stress waves, huge impact energy is generated within a very short time, rocks can be effectively crushed, holes can be formed quickly, and the purpose of drilling the rocks and the holes is achieved.
In the down-the-hole hammer in the prior art, high-pressure gas enters a high-pressure channel in a joint, the high-pressure air flows to a piston through an air distribution seat after a check valve is flushed, so that pressure difference is generated at two ends of the piston, the piston moves up and down continuously, and when the piston impacts a drill bit downwards, the drill bit crushes rocks due to violent impact. The drill bit is arranged at the front end of the outer cylinder, and the drill bit often gives larger impact force to the end part of the outer cylinder in the process of breaking rocks, so that the front end surface of the outer cylinder is easily abraded, the outer cylinder needs to be frequently replaced, and the use cost of the down-the-hole hammer is increased.
Therefore, there is a need for a down-the-hole impactor that has a simple structure, increases the service life of the outer casing, and reduces the cost of use of the down-the-hole impactor.
Disclosure of Invention
In order to solve the technical problem, the application provides a down-the-hole hammer which is simple in structure, capable of prolonging the service life of an outer cylinder and reducing the use cost of the down-the-hole hammer.
The technical scheme provided by the application is as follows:
a down-the-hole impactor, comprising:
the outer cylinder is of a centrosymmetric structure, and the rear end of the outer cylinder is connected with the joint and the front end of the outer cylinder is connected with the clamping sleeve through threads;
the check valve, the gas distribution seat, the piston and the drill bit are sleeved in the outer cylinder and sequentially arranged from the joint to the direction of the clamping sleeve, the drill bit is sleeved in the clamping sleeve, a bushing is further arranged in the outer cylinder and sleeved on the outer side of the drill bit, and the bushing is arranged at the rear end of the clamping sleeve;
the first retaining wire and the second retaining wire are symmetrically arranged in the outer cylinder, the first retaining wire is abutted to the front end face of the gas distribution seat, and the second retaining wire is abutted to the rear end face of the bushing.
Preferably, an air inlet channel is arranged in the joint, the check valve is arranged on the air distribution seat and used for opening and closing the air inlet channel, an air distribution channel communicated with the air inlet channel is arranged in the air distribution seat, and an exhaust channel is arranged in the drill bit;
the piston is provided with a first air groove matched with an air distribution rod of the air distribution seat and a second air groove matched with a tail pipe of the drill bit, and the piston moves along the axial direction of the outer cylinder to switch a first state and a second state;
when the piston is in a first state, the air distribution channel is communicated with the front air chamber, and the rear air chamber is communicated with the exhaust channel;
when the piston is in the second state, the air distribution channel is communicated with the rear air chamber, and the front air chamber is communicated with the exhaust channel.
Preferably, the method further comprises the following steps:
the first groove is arranged on the outer side of the piston and is communicated with the first air groove through a first air hole;
the setting is in on the inner wall of outer cylinder, with the second annular of preceding air chamber intercommunication, work as when the piston is in the first state, first recess with the second annular intercommunication, work as when the piston is in the second state, first recess with the second annular is independent.
Preferably, the method further comprises the following steps:
the second groove is arranged on the outer side of the piston and is communicated with the second air groove through a second air hole;
the setting is in the inner wall of outer cylinder, with the first annular of back air chamber, when the piston is in the second state, first annular with the second recess is independent, works as when the piston is in the second state, first annular with the second recess intercommunication.
Preferably, the first ring groove and the second ring groove are symmetrically arranged on the outer cylinder.
Preferably, the first air hole is arranged to be inclined downward, and the second air hole is arranged to be inclined downward.
Preferably, when the piston is in the second state, the tail pipe is separated from the second air groove, and the front air chamber is communicated with the exhaust passage.
Preferably, a communication section and a blocking section are arranged at one end, far away from the joint, of the gas distribution rod, and an opening section and an accommodating section are arranged at one end, far away from the joint, of the first gas tank;
wherein,
the outer diameter of the communicating section is smaller than that of the blocking section, the inner diameter of the opening section is matched with that of the blocking section, and the inner diameter of the opening section is smaller than that of the accommodating section.
Preferably, the method further comprises the following steps:
a first seal disposed between the gas distribution base and the outer cylinder;
a second seal disposed between the liner and the outer cylinder.
Preferably, the method further comprises the following steps:
the split type clamping ring is sleeved on the drill bit, the front end face of the split type clamping ring is abutted to the bushing, and the rear end face of the split type clamping ring is abutted to the clamping sleeve;
and the elastic ring is sleeved on the outer sides of the split clamping rings and fixes the split clamping rings and the drill bit.
Preferably, the check valve includes:
the valve seat is connected with the gas distribution seat, and an air cavity is formed between the valve seat and the joint;
the air passing channel is arranged in the valve seat and is communicated with the air cavity and the air distribution channel;
and the valve rod is movably arranged at the front end of the valve seat and is used for opening and closing the air inlet channel.
Preferably, the method further comprises the following steps:
the buffer pad is sleeved on the outer side of the valve seat, the front end face of the buffer pad is abutted to the gas distribution seat, and the rear end face of the buffer pad is abutted to the joint.
The invention provides a down-the-hole impactor which is characterized in that an outer cylinder, a joint and a clamping sleeve are arranged, wherein the outer cylinder is of a central symmetrical structure, the rear end of the outer cylinder is in threaded connection with the joint, the front end of the outer cylinder is in threaded connection with the clamping sleeve, a check valve, an air distribution seat, a piston and a drill bit are sequentially sleeved in the outer cylinder from the joint to the clamping sleeve, the drill bit is sleeved in the clamping sleeve, a bushing is further arranged in the outer cylinder and sleeved on the outer side of the drill bit, and the bushing is located at the rear end of the clamping sleeve. Secondly, still be provided with first fender silk and second fender silk, wherein, first fender silk and second fender silk symmetry set up on the inner wall of outer jar, first fender silk and the preceding terminal surface butt of gas distribution seat, the rear end face of gas distribution seat is spacing through the joint, the preceding terminal surface of gas distribution seat is spacing through first fender silk, second fender silk and the rear end face butt of bush, spacing through inlay card cover and second fender silk to the bush, the piston activity sets up in the outer jar, and the reciprocating motion between gas distribution seat and bush, provide pulse effort for the drill bit, the preceding terminal surface wearing and tearing of outer jar and drill bit contact are serious, but the wearing and tearing of the rear end face of outer jar and joint contact are less, first fender silk and second fender silk symmetry set up on the outer jar, can exchange the both ends of outer jar, the life of outer jar is prolonged, on the other hand, the gas distribution seat is fixed a position through joint and first fender silk, the bush is fixed a position through second fender silk and inlay card cover, simple structure, and convenient assembling. Therefore, compared with the prior art, the down-the-hole hammer in the embodiment of the invention has a simple structure, can prolong the service life of the outer cylinder and reduce the use cost of the down-the-hole hammer.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an outer cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a down-the-hole impactor according to an embodiment of the invention (with the piston in a first state);
FIG. 3 is a schematic illustration of one configuration of a down-the-hole impactor provided in accordance with an embodiment of the invention (with the piston in a second state);
FIG. 4 is a schematic diagram of a piston according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a gas distribution base according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a check valve according to an embodiment of the present invention.
Reference numerals: 1. an outer cylinder; 2. a joint; 3. nesting the cards; 4. a check valve; 5. a gas distribution base; 6. a piston; 7. a drill bit; 8. a bushing; 11. a first wire retaining; 12. second filament retaining; 13. a front air chamber; 14. a rear air chamber; 16. a first ring groove; 15. a second ring groove; 21. an air intake passage; 41. a valve seat; 42. a gas passage; 43. a valve stem; 44. a cushion pad; 51. a gas distribution channel; 52. a gas distribution rod; 53. a first seal member; 61. a first gas tank; 62. a second gas tank; 63. a first air hole; 64. a first groove; 65. a second air hole; 66. a second groove; 71. an exhaust passage; 72. a tail pipe; 81. a second seal member; 91. a split snap ring; 92. an elastic ring; 521. a communicating section; 522. a plugging section; 611. an opening section; 612. an accommodating section.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, are not essential to the technology, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
Embodiments of the present invention are written in a progressive manner.
As shown in fig. 1 to 6, an embodiment of the present invention provides a down-the-hole impactor, including: the outer cylinder 1 is of a centrosymmetric structure, and the rear end of the outer cylinder 1 is connected with the joint 2 and the front end of the outer cylinder 1 is connected with the embedded sleeve 3 through threads; the check valve 4, the gas distribution seat 5, the piston 6 and the drill bit 7 are sleeved in the outer cylinder 1 and sequentially arranged from the joint 2 to the direction of the clamping sleeve 3, the drill bit 7 is sleeved in the clamping sleeve 3, a bushing 8 is further arranged in the outer cylinder 1, the bushing 8 is sleeved on the outer side of the drill bit 7, and the bushing 8 is arranged at the rear end of the clamping sleeve 3; the first retaining wire 11 and the second retaining wire 12 are symmetrically arranged in the outer cylinder 1, the first retaining wire 11 is abutted against the front end face of the air distribution seat 5, and the second retaining wire 12 is abutted against the rear end face of the bushing 8.
In the present invention, the phrase "the outer cylinder 1 has a centrosymmetric structure" means that both ends of the outer cylinder 1 are arranged in a centrosymmetric manner in the axial direction thereof. In the present invention, the "rear end of the outer cylinder 1" means an end of the outer cylinder 1 near the joint 2, and the "front end of the outer cylinder 1" means an end of the outer cylinder 1 near the bit 7.
In the process of drilling by the drill bit in the prior art, the drill bit often gives larger impact force to the end part of the outer cylinder in the process of breaking rocks, so that the front end surface of the outer cylinder is easily abraded, the outer cylinder needs to be frequently replaced, and the use cost of the down-the-hole hammer is increased.
The invention provides a down-hole hammer, which is characterized in that an outer cylinder 1, a joint 2 and a clamping sleeve 3 are arranged, wherein the outer cylinder 1 is of a central symmetry structure, the rear end of the outer cylinder 1 is in threaded connection with the joint 2, and the front end of the outer cylinder 1 is in threaded connection with the clamping sleeve 3, a check valve 4, an air distribution seat 5, a piston 6 and a drill bit 7 are sequentially sleeved in the outer cylinder 1 from the joint 2 to the direction of the clamping sleeve 3, the drill bit 7 is sleeved in the clamping sleeve 3, a bushing 8 is further arranged in the outer cylinder 1, the bushing 8 is sleeved on the outer side of the drill bit 7, and the bushing 8 is positioned at the rear end of the clamping sleeve 3. In order to fix the components, a first retaining wire 11 and a second retaining wire 12 are further arranged, wherein the first retaining wire 11 and the second retaining wire 12 are symmetrically arranged on the inner wall of the outer cylinder 1, the first retaining wire 11 is abutted against the front end face of the air distribution seat 5, the rear end face of the air distribution seat 5 is limited through the joint 2, the front end face of the air distribution seat 5 is limited through the first retaining wire 11, the second retaining wire 12 is abutted against the rear end face of the bushing 8, the bushing 8 is limited through the clamping sleeve 3 and the second retaining wire 12, the piston 6 is movably arranged in the outer cylinder and reciprocates between the air distribution seat 5 and the bushing 8 to provide pulse acting force for the drill bit 7, as the first retaining wire 11 and the second retaining wire 12 are symmetrically arranged on the outer cylinder 1, two ends of the outer cylinder 1 can be interchanged, the service life of the outer cylinder 1 is prolonged, on the other hand, the air distribution seat 5 is positioned through the joint and the first retaining wire 11, and the bushing 8 is positioned through the clamping sleeve and the second retaining wire 12, the structure is simple and the assembly is convenient. Therefore, compared with the prior art, the down-the-hole hammer in the embodiment of the invention has a simple structure, can prolong the service life of the outer cylinder 1 and reduce the use cost of the down-the-hole hammer.
Furthermore, in the embodiment of the present invention, a first installation ring groove and a second installation ring groove are arranged on the inner wall of the outer cylinder 1, the first retaining wire 11 is detachably arranged in the first installation ring groove, the second retaining wire 12 is detachably arranged in the second installation ring groove, and the first installation ring groove and the second installation ring groove are symmetrically arranged along the center of the outer cylinder 1. Furthermore, the first wire retaining 11 and the second wire retaining 12 in the embodiment of the present invention are both annular retaining rings provided with openings; the first retaining wire 11 and the second retaining wire 12 are more convenient to disassemble and assemble.
Further, the first stop wire 11 and the second stop wire 12 in the embodiment of the present invention are both made of spring steel material.
In the down-the-hole impacter in the prior art, air distribution is performed in a mode that an inner cylinder is arranged in an outer cylinder 1, but because the inner diameters of the outer cylinders 1 of the down-the-hole impacter are consistent, the diameter of a piston 6 can be reduced by increasing the structure of the inner cylinder, the piston 6 reciprocates in the outer cylinder 1 to provide a pulse effect for a drill bit 7 in the use process of the impacter, and if the diameter of the piston 6 is small, the piston 6 is easy to break, and the service life of the impacter is influenced. As one embodiment, the present example provides an impactor without an internal cylinder, where the piston 6 has a larger diameter, is less likely to break, and has a longer useful life than a down-the-hole impactor with an internal cylinder.
As one embodiment, in the down-the-hole hammer provided in the embodiment of the present invention, an air inlet channel 21 is provided in a joint 2, a check valve 4 is provided on an air distribution seat 5 for opening and closing the air inlet channel 21, an air distribution channel 51 for communicating with the air inlet channel 21 is provided in the air distribution seat 5, and an exhaust channel 71 is provided in a drill bit 7; the piston 6 is provided with a first air groove 61 matched with the air distribution rod 52 of the air distribution seat 5 and a second air groove 62 matched with the tail pipe 72 of the drill bit 7, and the piston 6 moves along the axial direction of the outer cylinder 1 to switch a first state and a second state; when the piston 6 is in the first state, the air distribution passage 51 is communicated with the front air chamber 13, and the rear air chamber 14 is communicated with the exhaust passage 71; when the piston 6 is in the second state, the air distribution passage 51 communicates with the rear air chamber 14, and the front air chamber 13 communicates with the exhaust passage 71.
Specifically, the air inlet passage 21 on the joint 2 is communicated with a high-pressure air source, in an initial state, the check valve 4 is abutted against the air inlet passage 21 on the joint 2, the air inlet passage 21 is in a closed state, under the action of the high-pressure air source, the high-pressure air source in the air inlet passage 21 pushes the check valve 4 to move towards the direction of the air distribution seat, the air inlet passage 21 is opened, the air inlet passage 21 is communicated with the air distribution passage 51 for air distribution, the piston 6 is provided with a first air groove 61 and a second air groove 62, wherein the first air groove 61 is matched with an air distribution rod 52 on the air distribution seat 5, the second air groove 62 is matched with a tail pipe 72 of the drill bit 7 for use, and due to the air pressure difference between the front air chamber 13 and the rear air chamber 14 of the piston 6, the piston 6 is pushed to move along the axial direction of the outer cylinder 1, so that the piston 6 has a first state and a second state, when the piston 6 is in the first state, the air distribution channel 51 is communicated with the front air chamber 13, the front air chamber 13 is independent of the exhaust channel 71, the rear air chamber 14 is communicated with the exhaust channel 71, the rear air chamber 14 is independent of the air distribution channel 51, in the first state, high-pressure air in the air inlet channel 21 enters the front air chamber 13 from the air distribution channel 51, the piston 6 is pushed to move towards the direction of the joint 2 along with the increase of the air pressure of the front air chamber 13, and the high-pressure air in the rear air chamber 14 is exhausted from the working end face of the drill bit through the exhaust channel 71 to blow slag. When the piston 6 is switched from the first state to the second state, the gas distribution channel 51 is communicated with the rear gas chamber 14, the front gas chamber 13 is communicated with the exhaust channel 71, the front gas chamber 13 is independent of the gas distribution channel 51, the rear gas chamber 14 is independent of the exhaust channel 71, high-pressure gas enters the rear gas chamber 14 from the gas distribution channel 51, the piston 6 is pushed to move towards the direction of the drill bit 7 along with the increase of the air pressure of the rear gas chamber 14, and the high-pressure gas in the front gas chamber 13 is exhausted from the working end face of the drill bit through the exhaust channel 71 to blow slag. The down-the-hole hammer in the embodiment of the invention does not need to be provided with an inner cylinder, the diameter of the piston 6 is larger, the piston is less prone to fracture, and the service life of the hammer is longer.
In the above-described structure, in order to make the front air chamber and the gas distribution passage communicate with each other in the first state and independent from each other in the second state, as one embodiment, the down-the-hole hammer in the embodiment of the present invention further includes a first recess 64, a first air hole 63, and a second annular groove 15, wherein the first recess 64 is disposed on the outer wall of the piston 6, the first air hole 63 is disposed inside the piston 6, the first recess 64 communicates with the first air hole 61 via the first air hole 63, the second annular groove 15 is disposed on the inner wall of the outer cylinder 1, and the second annular groove 15 communicates with the front air chamber 13, when the piston 6 is in the first state, the high-pressure gas in the gas distribution passage 51 communicates with the front air chamber 13 via the first air hole 61, the first recess 63, the first recess 64, and the first annular groove 16, and when the piston 6 is in the second state, the first recess 64 and the second annular groove 15 are independent from each other. Specifically, when the piston 6 is in the first state, the first groove 64 is communicated with the first annular groove 16, high-pressure gas in the gas distribution passage enters the first groove 64 through the first gas groove 61 and the first gas hole 63, the high-pressure gas in the first groove 64 enters the front gas chamber through the first annular groove 16, at this time, the gas distribution passage 51 is independent of the rear gas chamber 14, when the air pressure in the front gas chamber 13 is greater than the air pressure in the rear gas chamber 14, the piston 6 is pushed to move towards the direction of the joint 2, when the piston 6 moves to the second state, the first groove 64 is independent of the first annular groove 16, the gas distribution passage 51 is communicated with the rear gas chamber 14, the front gas chamber 13 is communicated with the exhaust passage 71, at this time, the high-pressure gas in the gas distribution passage 51 does not enter the front gas chamber 13 any more, but enters the rear gas chamber 14, when the air pressure in the rear gas chamber 14 is greater than the air pressure in the front gas chamber 13, the piston 6 is pushed to move towards the direction of the 7, and the impact drill bit 7 breaks rocks.
In the above structure, as one embodiment, the down-the-hole hammer in the embodiment of the present invention further includes a second air hole 65, a second groove 66 and a first ring groove 16, wherein the second groove 66 is disposed on the outer wall of the piston 6, the second groove 66 is communicated with the second air groove 62 through the second air hole 65, the first ring groove 16 is disposed on the inner wall of the outer cylinder 1, the first ring groove 16 is communicated with the rear air chamber 14, when the piston 6 is in the first state, the rear air chamber 14 is communicated with the second groove 66 through the first ring groove 16, and when the piston 6 is in the second state, the second groove 66 is independent from the first ring groove 16. Specifically, when the piston 6 is in the first state, the rear air chamber 14 is communicated with the exhaust channel 71 through the first annular groove 16, the second groove 66, the second air hole 65 and the second air groove 62, when the piston 6 is in the second state, the air distribution channel 51 is communicated with the rear air chamber 14, the first annular groove 16 and the second groove 66 are independent, high-pressure air in the air distribution channel 51 enters the rear air chamber 14, and the high-pressure air in the front air chamber 13 is exhausted from the working end face of the drill bit through the air distribution channel 71, so that slag blowing is performed.
In the above structure, in order to realize the interchange of the two ends of the outer cylinder 1, as one embodiment, the first ring groove 16 and the second ring groove 15 in the embodiment of the present invention are symmetrically arranged on the outer cylinder 1, and thus, the interchange of the two ends of the outer cylinder 1 does not affect the usability of the impactor.
In the above structure, as one of the embodiments, the first air hole 63 is arranged obliquely downward, and the second air hole 65 is arranged obliquely downward in the embodiment of the present invention, specifically, the first air groove 61 is arranged in the middle of the piston 6, the first groove 64 is arranged on the side wall of the piston 6, and the first air hole 63 is arranged obliquely downward; the second groove 66 is arranged on the side wall of the piston 6, the second air groove 62 is arranged in the middle of the piston 6, and the second air hole 65 is arranged in a downward inclined mode; so arranged, the gas has less resistance during its flow within the piston 6.
In the above-described structure, in order to make the front air chamber 13 independent from the exhaust passage 71 when the piston 6 is in the first state and make the front air chamber 13 communicate with the exhaust passage 71 when the piston is in the second state, as one of the embodiments, the tail pipe 72 is separated from the second air groove 62 so that the front air chamber 13 communicates with the exhaust passage 71 when the piston 6 is in the second state in the embodiment of the present invention. When the piston 6 is in the first state, the tail pipe 72 is located in the second air groove 62, the front air chamber 13 is independent from the exhaust passage 71, and the rear air chamber 14 is communicated with the exhaust passage 71 through the first ring groove 16, the second groove 66, the second air hole 65 and the second air groove 62.
In the above structure, the tail pipe 72 in the embodiment of the present invention is specifically a nylon tail pipe as one of the embodiments.
In the above-described structure, as one of the embodiments, the tail pipe 72 in the embodiment of the present invention is fixedly provided at the rear end of the drill bit 7.
In the above structure, in order to realize that the air distribution passage 51 communicates with the front air chamber 13 in the first state of the piston 6, and the air distribution passage 51 communicates with the rear air chamber 14 in the second state, as one embodiment, the air distribution rod 52 in the embodiment of the present invention is provided with a communicating section 521 and a blocking section 522 towards one end of the joint 2, and one end of the first air groove 61 away from the joint 2 is provided with an opening section 611 and an accommodating section 612; the outer diameter of the communicating section 521 is smaller than the outer diameter of the blocking section 522, the inner diameter of the opening section 611 is matched with the inner diameter of the blocking section 522, and the inner diameter of the opening section 611 is smaller than the inner diameter of the accommodating section 612.
Specifically, when the piston 6 is in the first state, the blocking section 522 is inserted into the opening section 611, at this time, the blocking section 522 is used in cooperation with the opening section 611, so that compressed air in the air distribution passage 51 can only enter the front air chamber 13 through the first air groove 61, the first air hole 63, the first groove 64 and the second annular groove 15, the rear air chamber 14 is independent of the first air groove 61, the rear air chamber 14 is communicated with the exhaust passage 71, when the air pressure in the front air chamber 13 is greater than the air pressure in the rear air chamber 14, the piston 6 is pushed to move towards the direction of the joint 2, air in the rear air chamber 14 enters the exhaust passage 71 for slag blowing, along with the movement of the piston 6, the blocking section 522 is inserted into the accommodating section 612, the communication section 521 is inserted into the opening section 611, at this time, the first air groove 61 is communicated with the rear air chamber 14, compressed air in the air distribution passage 51 can only enter the rear air chamber 14 through the first air groove 61, the front air chamber 13 is communicated with the exhaust passage 71, and when the air pressure in the rear air chamber 14 is greater than the air pressure in the front air chamber 13, the piston 6 moves towards the direction of the drill bit 7, so that the piston 6 moves to apply a reciprocating pulse force to the drill bit 7, and the drill bit 7.
In the above structure, in order to prevent the leakage phenomenon, as one embodiment, the down-the-hole hammer in the embodiment of the present invention further includes a first seal 53 and a second seal, wherein the first seal 53 is disposed between the valve seat 5 and the outer cylinder 1, and the second seal is disposed between the bushing 8 and the outer cylinder 1.
Further, the first sealing element 53 and the second sealing element in the embodiment of the present invention are specifically sealing rings, the outer side of the air distribution seat 5 in the embodiment of the present invention is provided with a first mounting ring groove for mounting the first sealing element 53, and the outer side of the bushing 8 is provided with a second mounting ring groove for mounting the second sealing element.
In the above structure, as one of the embodiments, the down-the-hole hammer according to the embodiment of the present invention further includes a split-type snap ring 91 fitted over the drill bit 7, a front end surface of the split-type snap ring 91 abuts against the bushing 8, and a rear end surface of the split-type snap ring 91 abuts against the insert sleeve 3; and the elastic ring 92 is sleeved on the outer side of the split clamping ring 91 and fixes the clamping ring and the drill bit 7.
In the above structure, the elastic ring 92 in the embodiment of the present invention is specifically an O-ring, and more specifically, the split type snap ring 91 in this embodiment includes a left snap ring and a right snap ring which are sleeved on the tail handle of the drill bit 7, the outer sides of the left snap ring and the right snap ring are provided with third mounting ring grooves, and the O-ring is mounted in the third mounting ring groove, so that the left snap ring and the right snap ring are fixed on the drill bit 7.
In order to solve the above problems, as one embodiment of the present invention, the check valve 4 in the embodiment of the present invention includes a valve seat 41 connected to the gas distribution seat 5, an air cavity is formed between the valve seat 41 and the joint 2, an air passage 42 communicating the air cavity and the gas distribution passage 51 is provided in the valve seat 41, the valve rod 43 is movably provided at the front end of the valve seat 41 to open and close the gas inlet passage 21, and high-pressure gas in the gas inlet passage 21 enters the gas distribution passage 51 through the air cavity and the air passage 42 for gas distribution, and in this technical scheme, the gas distribution seat 5 and the valve seat 41 are separately provided, so that manufacturing costs of the gas distribution seat 5 and the valve seat 41 are reduced.
Furthermore, in the embodiment of the present invention, the rear end of the valve seat 41 is provided with a mounting hole, the valve rod 43 and the spring are sleeved in the mounting hole, two ends of the spring are respectively abutted to the mounting hole and the valve rod 43, one end of the valve rod 43, which is far away from the mounting hole, is provided with the conical joint 2 used in cooperation with the air inlet channel 21, under the action of the spring, when the air passage 42 is not communicated with the compressed air source, the conical joint 2 is abutted to an outlet of the air passage 42, when the air passage 42 is communicated with the compressed air source, under the action of the compressed air, the spring is compressed, the conical joint 2 is separated from the air inlet channel 21, and the high-pressure air of the air inlet channel 21 enters the air distribution channel 51 through the air cavity and the air passage 42 to be distributed.
In the above structure, as one embodiment, the down-the-hole hammer in the embodiment of the present invention further includes a cushion pad 44, a front end surface of the cushion pad 44 abuts against the gas distribution seat 5, a rear end surface of the cushion pad 44 abuts against the joint 2, and the piston 6 has a certain impact action on the gas distribution seat 5 during the reciprocating movement of the piston 6 in the outer cylinder 1, and the cushion pad 44 is further provided to prevent the piston 6 from moving in the outer cylinder 1, wherein the joint 2 and the gas distribution seat 5 provide a pre-pressure to the cushion pad 44 during the installation, and both sides of the cushion pad 44 always abut against the joint 2 and the gas distribution seat 5 during the reciprocating movement of the piston 6, so as to prevent the gas distribution seat 5 from moving.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A down-the-hole impactor, comprising:
the outer cylinder (1) is of a central symmetry structure, and the rear end of the outer cylinder (1) is connected with the joint (2) and the front end of the outer cylinder (1) is connected with the clamping sleeve (3) through threads;
the check valve (4), the gas distribution seat (5), the piston (6) and the drill bit (7) are sleeved in the outer cylinder (1) and sequentially arranged from the joint (2) to the direction of the clamping nest (3), the drill bit (7) is sleeved in the clamping nest (3), a lining (8) is further arranged in the outer cylinder (1), the lining (8) is sleeved on the outer side of the drill bit (7), and the lining (8) is arranged at the rear end of the clamping nest (3);
the first retaining wire (11) and the second retaining wire (12) are symmetrically arranged in the outer cylinder (1), the first retaining wire (11) is abutted to the front end face of the gas distribution seat (5), and the second retaining wire (12) is abutted to the rear end face of the bushing (8).
2. A down-the-hole impactor according to claim 1,
an air inlet channel (21) is arranged in the joint (2), the check valve (4) is arranged on the air distribution seat (5) and used for opening and closing the air inlet channel (21), an air distribution channel (51) communicated with the air inlet channel (21) is arranged in the air distribution seat (5), and an exhaust channel (71) is arranged in the drill bit (7);
the piston (6) is provided with a first air groove (61) matched with a gas distribution rod (52) of the gas distribution seat (5) for use and a second air groove (62) matched with a tail pipe (72) of the drill bit (7) for use, and the piston (6) moves along the axial direction of the outer cylinder (1) to switch a first state and a second state;
when the piston (6) is in a first state, the air distribution channel (51) is communicated with the front air chamber (13), and the rear air chamber (14) is communicated with the exhaust channel (71);
when the piston (6) is in the second state, the air distribution channel (51) is communicated with the rear air chamber (14), and the front air chamber (13) is communicated with the exhaust channel (71).
3. A down-the-hole impactor according to claim 2,
further comprising:
a first groove (64) which is arranged on the outer side of the piston (6) and is communicated with the first air groove (61) through a first air hole (63);
the second annular groove (15) is arranged on the inner wall of the outer cylinder (1) and communicated with the front air chamber (13), when the piston (6) is in a first state, the first groove (64) is communicated with the second annular groove (15), and when the piston (6) is in a second state, the first groove (64) is independent of the second annular groove (15).
4. A down-the-hole impactor according to claim 3,
further comprising:
a second groove (66) which is arranged on the outer side of the piston (6) and is communicated with the second air groove (62) through a second air hole (65);
the first annular groove (16) is arranged on the inner wall of the outer cylinder (1), the first annular groove (16) of the rear air chamber (14) is independent of the second groove (66) when the piston (6) is in the second state, and the first annular groove (16) is communicated with the second groove (66) when the piston (6) is in the second state.
5. A down-the-hole impactor according to claim 4,
the first ring groove (16) and the second ring groove (15) are symmetrically arranged on the outer cylinder (1).
6. A down-the-hole impactor according to claim 5,
the first air hole (63) is arranged obliquely downwards, and the second air hole (65) is arranged obliquely downwards.
7. A down-the-hole impactor according to any one of claims 2 to 6,
when the piston (6) is in the second state, the tail pipe (72) is separated from the second air groove (62), and the front air chamber (13) is communicated with the exhaust passage (71).
8. A down-the-hole impactor according to any one of claims 2 to 6,
a communicating section (521) and a blocking section (522) are arranged at one end, facing away from the joint (2), of the gas distribution rod (52), and an opening section (611) and an accommodating section (612) are arranged at one end, away from the joint (2), of the first gas groove (61);
wherein,
the outer diameter of the communication section (521) is smaller than that of the blocking section (522), the inner diameter of the opening section (611) is matched with that of the blocking section (522), and the inner diameter of the opening section (611) is smaller than that of the accommodating section (612).
9. A down-the-hole impactor according to any one of claims 1 to 6,
further comprising:
a first seal (53) arranged between the gas distribution seat (5) and the outer cylinder (1);
a second seal (81) disposed between the bushing (8) and the outer cylinder (1).
10. A down-the-hole impactor according to any one of claims 1 to 6,
further comprising:
the split type clamping ring (91) is sleeved on the drill bit (7), the front end face of the split type clamping ring (91) is abutted to the lining (8), and the rear end face of the split type clamping ring (91) is abutted to the clamping sleeve (3);
the split snap ring (91) is sleeved with an elastic ring (92) which is used for fixing the split snap ring (91) and the drill bit (7).
11. A down-the-hole impactor according to any one of claims 2 to 6,
the check valve (4) comprises:
the valve seat (41) is connected with the gas distribution seat (5), and a gas cavity is formed between the valve seat (41) and the joint (2);
a gas passing channel (42) arranged in the valve seat (41) and communicating the gas cavity with the gas distribution channel (51);
a valve rod (43) movably disposed at a front end of the valve seat (41) for opening and closing the intake passage (21).
12. A down-the-hole impactor according to claim 11,
further comprising:
and the buffer pad (44) is sleeved on the outer side of the valve seat (41), the front end face of the buffer pad (44) is abutted with the gas distribution seat (5), and the rear end face of the buffer pad (44) is abutted with the joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211610175.5A CN115596347B (en) | 2022-12-15 | 2022-12-15 | Down-the-hole hammer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211610175.5A CN115596347B (en) | 2022-12-15 | 2022-12-15 | Down-the-hole hammer |
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| CN115596347B CN115596347B (en) | 2023-03-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934016U (en) * | 2010-11-18 | 2011-08-17 | 长沙天和钻具机械有限公司 | Down-the-hole hammer |
| CN207278184U (en) * | 2017-10-16 | 2018-04-27 | 长沙超金刚机械制造有限公司 | Down-the-hole air hammer piston |
| CN108487857A (en) * | 2018-05-19 | 2018-09-04 | 山东胜利石油装备产业技术研究院 | A kind of novel valve-type hydraulic impacter |
| CN110952918A (en) * | 2019-12-27 | 2020-04-03 | 长沙黑金刚实业有限公司 | Impactor |
| CN112240161A (en) * | 2019-07-16 | 2021-01-19 | 中国石油化工股份有限公司 | Drilling speed-up tool |
-
2022
- 2022-12-15 CN CN202211610175.5A patent/CN115596347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934016U (en) * | 2010-11-18 | 2011-08-17 | 长沙天和钻具机械有限公司 | Down-the-hole hammer |
| CN207278184U (en) * | 2017-10-16 | 2018-04-27 | 长沙超金刚机械制造有限公司 | Down-the-hole air hammer piston |
| CN108487857A (en) * | 2018-05-19 | 2018-09-04 | 山东胜利石油装备产业技术研究院 | A kind of novel valve-type hydraulic impacter |
| CN112240161A (en) * | 2019-07-16 | 2021-01-19 | 中国石油化工股份有限公司 | Drilling speed-up tool |
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| CN115596347B (en) | 2023-03-21 |
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