An impinger

Abstract

The utility model provides an impactor, include: outer sleeve, the both ends of outer sleeve are linked with joint assembly and drill bit assembly respectively, inner sleeve, coaxial fixedly cover and set in outer sleeve, piston, coaxial cover and install in inner sleeve, the piston, inner sleeve and joint assembly form rear air chamber between, the piston, outer sleeve and drill bit assembly form front air chamber between, gas distribution passage is arranged in outer sleeve, gas distribution passage is configured as: with piston moves and is alternately linked with rear air chamber and front air chamber, first air hole is arranged on inner sleeve, is used for connecting gas distribution passage with rear air chamber. Compared with prior art, the utility model provides an impactor, can realize the quick air inlet of rear air chamber, makes the air pressure of rear air chamber quick promotion, improves the rock drilling performance of impactor, improves the work efficiency of drilling operation.

Description

Technical Field

[0001] This utility model relates to the field of drilling construction technology, and in particular to an impactor. Background Technology

[0002] An impactor is a tool used for blasting and drilling operations in mines, wells, and other locations. During operation, high-pressure air supplied by an air compressor enters the front and rear chambers of the impactor to perform work, causing the piston to reciprocate at high speed to strike the tail of the drill bit. Ultimately, the rock is broken through the alloy teeth on the drill bit, and the resulting rock debris is blown out of the bottom of the hole by the high-pressure gas discharged from the impactor, thus completing the hole formation.

[0003] Current impactors primarily use a piston to divide the outer casing into a front and rear air chamber. Air is alternately introduced into the front and rear chambers, and the pressure difference between them drives the piston to reciprocate. The rate of air intake into the front and rear chambers, as well as the air pressure within the chambers, determines the piston's impact frequency and the magnitude of the impact energy, thus determining the impactor's rock-drilling performance. Current down-the-hole impactors often adjust the air intake speed and pressure of the front and rear chambers by adjusting the size of the air inlets. However, existing impactors struggle to achieve rapid air intake and pressure increase in the rear chamber.

[0004] Therefore, there is an urgent need for an impactor that can rapidly introduce air into the rear chamber, thereby increasing the air pressure in the rear chamber quickly, improving the rock-drilling performance of the impactor, and increasing the efficiency of drilling operations. Utility Model Content

[0005] To address the technical problems in existing technologies, this invention provides a reverse circulation impactor that enables rapid air intake into the rear chamber, resulting in a rapid increase in air pressure within the rear chamber, thereby improving the rock-drilling performance of the impactor and increasing the efficiency of drilling operations.

[0006] An impactor, comprising: The outer sleeve is connected at both ends to the connector assembly and the drill bit assembly, respectively. The inner sleeve is coaxially and fixedly fitted inside the outer sleeve; A piston is coaxially fitted inside the inner sleeve. A rear air chamber is formed between the piston, the inner sleeve, and the joint assembly. A front air chamber is formed between the piston, the outer sleeve, and the drill bit assembly. A gas distribution passage is disposed inside the outer sleeve, and the gas distribution passage is configured to alternately communicate with the rear air chamber and the front air chamber as the piston moves; The first vent is provided on the inner sleeve and is used to connect the gas distribution channel and the rear air chamber.

[0007] Preferably, the first vent hole is located at one end of the inner sleeve near the connector assembly.

[0008] Preferably, the outlet of the first air passage is located on the inner wall of the inner sleeve that contacts the rear air chamber.

[0009] Preferably, the first vent is inclined.

[0010] Preferably, the inner diameter of the first vent is 1 mm to 5 mm.

[0011] Preferably, at least two first vent holes are provided, and the first vent holes are spaced apart around the inner sleeve in a circumferential manner.

[0012] Preferably, the gas distribution channel includes: A first air passage is provided between the inner sleeve and the outer sleeve, and the first air passage is connected to the rear air chamber through a first air passage. A second vent hole is provided on the inner sleeve, and the second vent hole is located at the end of the first vent hole away from the piston. An air intake channel is provided in the connector assembly, and the air intake channel communicates with the first air passage through the second vent hole.

[0013] Preferably, the gas distribution channel further includes: A third vent is provided on the inner sleeve. The third vent is located at the end of the first vent that is away from the second vent. The third vent is configured such that the piston moves axially to alternately communicate with the rear air chamber and the front air chamber.

[0014] Preferably, the gas distribution channel further includes: A first vent groove is provided on the outer surface of the piston, and the first vent groove is recessed toward the axis of the piston. The second air passage groove is provided inside the inner sleeve. The second air passage groove is recessed from the inner surface of the inner sleeve in an axial direction away from the inner sleeve. The high-pressure gas communicates with the rear air chamber through the third air passage hole, the first air passage groove and the second air passage groove.

[0015] Preferably, the gas distribution channel further includes: A third air passage groove is provided on the inner wall of the outer sleeve. The third air passage groove is recessed in a direction away from the axis of the outer sleeve. The third air passage groove is used to communicate with the front air chamber. The piston moves axially so that the first air passage groove alternately communicates with the second air passage groove and the third air passage groove.

[0016] Compared with existing technologies, the impactor provided by this utility model, firstly, is equipped with an outer sleeve, an inner sleeve, a piston, and an air distribution channel. The two ends of the outer sleeve are connected to the connector assembly and the drill bit assembly, respectively. The inner sleeve is coaxially fixedly fitted inside the outer sleeve, and the piston is fitted inside the inner sleeve. A rear air chamber is formed between the piston, the connector assembly, and the inner sleeve, and a front air chamber is formed between the piston, the outer sleeve, and the drill bit assembly. The air distribution channel is located inside the outer sleeve and is configured to move with the piston, alternately communicating with the front and rear air chambers. The pressure difference between the front and rear air chambers drives the piston to reciprocate. To rapidly increase the air pressure in the rear air chamber, a first vent is provided on the inner sleeve, connecting the air distribution channel to the rear air chamber. The high-pressure gas entering the gas distribution channel is partially alternately fed into the front and rear gas chambers, driving the piston to reciprocate for drilling. A small portion enters directly into the rear gas chamber through the first vent, rapidly increasing the intake of the rear chamber and the piston's movement frequency. The gas pressure passing through the first vent significantly increases, quickly raising the gas pressure in the rear chamber and thus increasing the impact force of the piston striking the drill bit. This enhances the rock-breaking ability of the drill bit's alloy teeth, ultimately improving the rock-drilling performance of the impactor and increasing drilling efficiency. Therefore, compared to existing technologies, the impactor provided in this embodiment achieves rapid intake of the rear gas chamber, resulting in a rapid increase in rear gas pressure, improving the rock-drilling performance of the impactor and increasing drilling efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the first structure of the impactor provided in this embodiment of the utility model (the air inlet channel is connected to the front air chamber). Figure 2 A schematic diagram of the first structure of the impactor provided in this embodiment of the utility model (the air inlet channel is connected to the rear air chamber). Figure 3 This is a schematic diagram of the inner sleeve in one embodiment of the present utility model; Figure 4 This is a schematic diagram of a second structure of the impactor provided in an embodiment of the present utility model; Figure 5 for Figure 4 A magnified view of a portion of the image.

[0019] Reference numerals: 1. Outer sleeve; 2. Connector assembly; 3. Drill bit assembly; 4. Inner sleeve; 5. Piston; 61. Rear air chamber; 62. Front air chamber; 8. First air passage; 71. First air passage; 72. Second air passage; 73. Third air passage; 74. First air groove; 75. Second air groove; 76. Third air groove; 21. Air inlet channel; 31. Slag blowing channel. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] like Figures 1 to 5 As shown, this utility model provides an impactor, comprising: an outer sleeve 1, the two ends of which are connected to a connector assembly 2 and a drill assembly 3 respectively; an inner sleeve 4, coaxially fixedly sleeved inside the outer sleeve 1; a piston 5, coaxially sleeved inside the inner sleeve 4, forming a rear air chamber 61 between the piston 5, the inner sleeve 4, and the connector assembly 2, and forming a front air chamber 62 between the piston 5, the outer sleeve 1, and the drill assembly 3; an air distribution channel, disposed inside the outer sleeve 1, configured to alternately communicate with the rear air chamber 61 and the front air chamber 62 as the piston 5 moves; and a first air passage 8, disposed on the inner sleeve 4, for connecting the air distribution channel and the rear air chamber 61.

[0024] Current down-the-hole impactors often adjust the air intake speed and gas pressure of the front and rear air chambers 61 by adjusting the size of the air inlets of the front air chamber 62 and the rear air chamber 61. However, existing impactors cannot achieve rapid air intake and rapid pressure increase in the rear air chamber 61.

[0025] To address the technical problems of existing impactors, this invention provides an impactor. Firstly, it comprises an outer sleeve 1, an inner sleeve 4, a piston 5, and an air distribution channel. The two ends of the outer sleeve 1 are connected to a connector assembly 2 and a drill bit assembly 3, respectively. The inner sleeve 4 is coaxially and fixedly fitted inside the outer sleeve 1. The piston 5 is fitted inside the inner sleeve 4. A rear air chamber 61 is formed between the piston 5, the connector assembly 2, and the inner sleeve 4. A front air chamber 62 is formed between the piston 5, the outer sleeve 1, and the drill bit assembly 3. The air distribution channel is located inside the outer sleeve 1 and is configured to move with the piston 5. The air distribution channel alternately communicates with the front air chamber 62 and the rear air chamber 61. The pressure difference between the front air chamber 62 and the rear air chamber 61 drives the piston 5 to reciprocate. To rapidly increase the pressure in the rear air chamber 61, a first vent 8 is provided on the inner sleeve 4, connecting the air distribution channel to the rear air chamber 61. The high-pressure gas entering the gas distribution channel is partially alternately introduced into the front air chamber 62 and the rear air chamber 61, driving the piston 5 to reciprocate for drilling. A small portion enters directly into the rear air chamber 61 through the first vent 8, thereby rapidly increasing the air intake of the rear air chamber 61 and increasing the movement frequency of the piston 5. The gas pressure passing through the first vent 8 increases significantly, rapidly raising the gas pressure in the rear air chamber 61, thus increasing the impact force of the piston 5 striking the drill bit downwards, i.e., increasing the rock-breaking ability of the drill bit's alloy teeth, ultimately improving the rock-drilling performance of the impactor and increasing the working efficiency of drilling operations. Therefore, compared with the prior art, the impactor provided by this embodiment of the present invention can achieve rapid air intake in the rear air chamber 61, causing a rapid increase in the air pressure in the rear air chamber 61, improving the rock-drilling performance of the impactor and increasing the working efficiency of drilling operations.

[0026] By setting a first vent 8, which is always directly connected to the rear air chamber 61, the gas pressure between the rear air chamber 61 and the front air chamber 62 is smaller compared with the impactor in the prior art, which increases the frequency of the piston 5 striking the drill bit. In addition, when the rear air chamber 61 is intake, the high-pressure gas through the first vent 8 directly enters the rear air chamber 61, which allows the rear air chamber 61 to intake quickly, which can quickly increase the gas pressure in the rear air chamber 61, improve the rock drilling performance of the impactor, and improve the working efficiency of drilling operations.

[0027] Furthermore, as one embodiment, the first vent 8 in this utility model embodiment is located at one end of the inner sleeve 4 near the connector assembly 2. The connector assembly 2 is provided with an air inlet channel 21, which is connected to an external high-pressure air source. Compared with setting the first vent 8 in other positions, setting the first vent 8 at one end of the inner sleeve 4 near the connector assembly 2 results in the highest gas pressure for the gas entering the rear air chamber 61 through the first vent 8.

[0028] In the above structure, as one specific implementation, the outlet of the first air passage 8 in this embodiment of the present invention is located on the inner wall of the inner sleeve 4 that contacts the rear air chamber 61.

[0029] Furthermore, as one specific implementation, the first vent 8 in this embodiment of the present invention is inclined, so that when the high-pressure gas enters the rear air chamber 61 through the first vent 8, the loss of gas volume is smaller.

[0030] In the above structure, as one embodiment, the inner diameter of the first air passage 8 in this utility model embodiment is 1mm to 5mm.

[0031] More specifically, as one embodiment, at least two first vent holes 8 are provided in this utility model embodiment, and the first vent holes 8 are arranged circumferentially around the inner sleeve 4.

[0032] In the above structure, as one embodiment, the gas distribution channel in this utility model includes a first gas passage 71 and a second gas passage 72. The first gas passage 71 is disposed between the inner sleeve 4 and the outer sleeve 1, and the first gas passage 71 is connected to the rear air chamber 61 through the first gas passage 8. The second gas passage 72 is disposed on the inner sleeve 4 and is located at the end of the first gas passage 8 away from the piston 5. An air intake channel 21 is disposed in the connector assembly 2. The air intake channel 21 is used to deliver high-pressure gas into the inner sleeve 4, and the air intake channel 21 is connected to the first gas passage 71 through the second gas passage 72.

[0033] In the above structure, as one embodiment, the gas distribution channel in this utility model embodiment further includes a third gas passage 73. The third gas passage 73 is disposed on the inner sleeve 4. The third gas passage 73 is disposed at the end of the first gas passage 8 away from the second gas passage 72. The third gas passage 73 is configured to alternately communicate with the rear air chamber 61 and the front air chamber 62 as the piston 5 moves circumferentially.

[0034] Specifically, high-pressure gas from the outside enters the outer casing 1 through the intake channel 21. The high-pressure gas then enters the first air passage 71 through the second air passage 72. Due to the pressure difference between the front air chamber 62 and the rear air chamber 61, the piston 5 is driven to move axially. During the movement of the piston 5, the high-pressure gas in the first air passage 71 alternately communicates with the rear air chamber 61 and the front air chamber 62 through the third air passage 73. The first air passage 71 and the rear air chamber 61 are directly connected through the first air passage 8. A small portion of the gas in the first air passage 71 directly enters the rear air chamber 61 through the first air passage 8, while most of the gas alternately communicates with the rear air chamber 61 and the front air chamber 62 through the third air passage 73, driving the piston 5 to reciprocate for drilling. Because the first vent hole 8 is set to make the pressure difference between the rear air chamber 61 and the front air chamber 62 smaller, if the pressure difference between the rear air chamber 61 and the front air chamber 62 is too small, the impact force of the piston 5 on the drill bit will be too small, affecting the impact efficiency of the impactor. Therefore, when setting the size and number of the first vent hole 8, the gas pressure and intake efficiency of the rear air chamber 61 should be increased without affecting the impact effect of the piston 5.

[0035] Furthermore, as one embodiment, the gas distribution channel in this utility model embodiment also includes a first gas passage groove 74 and a second gas passage groove 75. The first gas passage groove 74 is disposed on the outer surface of the piston 5 and is recessed in the axial direction of the piston 5. The second gas passage groove 75 is disposed inside the inner sleeve 4 and is recessed from the inner surface of the inner sleeve 4 in the axial direction away from the inner sleeve 4. The high-pressure gas communicates with the rear air chamber 61 through the third gas passage hole 73, the first gas passage groove 74 and the second gas passage groove 75.

[0036] In the above structure, the gas distribution channel also includes a third gas passage 76. The third gas passage 76 is disposed on the inner wall of the outer sleeve 1 and is recessed in a direction away from the axis of the outer sleeve 1. The third gas passage 76 is used to communicate with the front air chamber 62. The piston 5 moves axially so that the first gas passage 74 alternately communicates with the second gas passage 75 and the third gas passage 76. When the first gas passage 74 communicates with the second gas passage 75, a small portion of the high-pressure gas in the first air passage 71 enters the rear air chamber 61 through the first gas passage 8, and most of the high-pressure gas in the first air passage 71 passes through the third gas passage 76. The air passage 73, the first air passage 74, and the second air passage 75 are connected to the rear air chamber 61. At this time, the high-pressure gas in the front air chamber 62 is blown out through the slag blowing channel 31 of the drill bit assembly 3. As the piston 5 moves, most of the high-pressure gas in the first air passage 71 is connected to the front air chamber 62 through the third air passage 73, the first air passage 74, and the third air passage 76. At this time, the high-pressure gas in the rear air chamber 61 is blown out through the slag blowing channel 31 in the drill bit assembly 3. Thus, the piston 5 moves axially to provide pulse force for the drill bit to drill.

[0037] Furthermore, as one implementation method, such as Figures 4 to 5 As shown, in this embodiment of the present invention, the first air passage 8 can be provided on the inner sleeve 4 of the positive circulation impactor, or, as... Figures 1 to 3 As shown, the first air passage 8 in this embodiment of the present invention can also be set on the inner sleeve 4 of the reverse circulation impactor.

[0038] Furthermore, both the drill bit assembly 3 and the connector assembly 2 are existing structures and will not be described further in this solution.

[0039] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. An impactor, characterized in that, include: The outer sleeve (1) is connected at both ends to the connector assembly (2) and the drill bit assembly (3), respectively. The inner sleeve (4) is coaxially fixed inside the outer sleeve (1); The piston (5) is coaxially fitted inside the inner sleeve (4). A rear air chamber (61) is formed between the piston (5), the inner sleeve (4) and the joint assembly (2), and a front air chamber (62) is formed between the piston (5), the outer sleeve (1) and the drill bit assembly (3). The gas distribution channel is located inside the outer sleeve (1) and is configured to alternately communicate with the rear air chamber (61) and the front air chamber (62) as the piston (5) moves. The first air passage (8) is provided on the inner sleeve (4) for connecting the air distribution channel and the rear air chamber (61).

2. The impactor according to claim 1, characterized in that, The first vent (8) is located at one end of the inner sleeve (4) near the connector assembly (2).

3. The impactor according to claim 2, characterized in that, The outlet of the first air passage (8) is located on the inner wall of the inner sleeve (4) in contact with the rear air chamber (61).

4. The impactor according to claim 3, characterized in that, The first air vent (8) is set at an angle.

5. The impactor according to any one of claims 1 to 4, characterized in that, The inner diameter of the first vent (8) is 1 mm to 5 mm.

6. The impactor according to any one of claims 1 to 4, characterized in that, At least two first vent holes (8) are provided, and the first vent holes (8) are arranged circumferentially around the inner sleeve (4).

7. The impactor according to any one of claims 1 to 4, characterized in that, The gas distribution channel includes: A first air passage (71) is provided between the inner sleeve (4) and the outer sleeve (1), and the first air passage (71) is connected to the rear air chamber (61) through a first air passage (8); A second vent hole (72) is provided on the inner sleeve (4). The second vent hole (72) is located at the end of the first vent hole (8) away from the piston (5). An air intake channel (21) is provided in the connector assembly (2). The air intake channel (21) is connected to the first air passage (71) via the second vent hole (72).

8. The impactor according to claim 7, characterized in that, The gas distribution channel also includes: The third vent (73) is provided on the inner sleeve (4). The third vent (73) is provided at the end of the first vent (8) away from the second vent (72). The third vent (73) is configured such that the piston (5) moves axially to alternately communicate with the rear air chamber (61) and the front air chamber (62).

9. The impactor according to claim 8, characterized in that, The gas distribution channel also includes: A first air passage groove (74) is provided on the outer surface of the piston (5), and the first air passage groove (74) is recessed in the direction of the axis of the piston (5); The second air passage groove (75) is provided in the inner sleeve (4). The second air passage groove (75) is recessed from the inner surface of the inner sleeve (4) in an axial direction away from the inner sleeve (4). The high-pressure gas communicates with the rear air chamber (61) through the third air passage hole (73), the first air passage groove (74) and the second air passage groove (75).

10. The impactor according to claim 9, characterized in that, The gas distribution channel also includes: A third air passage (76) is provided on the inner wall of the outer sleeve (1). The third air passage (76) is recessed in a direction away from the axis of the outer sleeve (1). The third air passage (76) is used to communicate with the front air chamber (62). The piston (5) moves axially so that the first air passage (74) alternately communicates with the second air passage (75) and the third air passage (76).

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