Improved down-the-hole hammer drill of photovoltaic drilling machine
By adding a stainless steel accessory sleeve to the outside of the down-the-hole hammer drill rod, the problem of loose soil at the bottom of the hole caused by uneven air pressure during photovoltaic micropile construction was solved, achieving efficient cleaning and quality improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2026-04-14
AI Technical Summary
In the construction of photovoltaic micropiles, the uneven air pressure caused by the change in cross-sectional dimensions of the down-the-hole hammer drill results in excessive loose soil at the bottom of the hole, affecting the construction quality and efficiency.
An accessory sleeve is added to the outside of the down-the-hole hammer drill rod. The additional sleeve, made of stainless steel, has the same outer diameter as the down-the-hole hammer and a length exceeding the depth of the pile hole. It is fixed by threaded connection to ensure consistent airflow cross section and increase gas flow rate and pressure to clear loose soil.
It enables the one-time removal of loose soil at the bottom of the hole, improving construction quality and efficiency, and is applicable to pile holes of different depths, reducing the need for secondary hole cleaning.
Smart Images
Figure CN224120191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pile foundation construction technology, specifically an improved photovoltaic drilling rig down-the-hole hammer drill. Background Technology
[0002] A down-the-hole hammer is a tool used for drilling holes, primarily in underground construction projects such as mines, tunnels, and building construction. The down-the-hole hammer uses pneumatic pressure to drive mechanical vibration, transmitting impact force to the rock or soil layer, causing it to break and loosen, thus achieving the purpose of drilling.
[0003] In the construction of photovoltaic micropiles, the pile holes are characterized by shallow depth and small diameter. During the hole-forming process, it was found that due to the change in cross-sectional dimensions of the down-the-hole hammer at multiple points from top to bottom, the air pressure was insufficient where the cross-section decreased, causing the soil to fall and resulting in excessive loose soil at the bottom of the hole. This required secondary hole cleaning, which seriously restricted the construction quality and progress, and was inefficient and inconvenient to use.
[0004] Therefore, this utility model provides an improved photovoltaic drilling rig down-the-hole hammer drill to solve the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an improved photovoltaic drilling rig down-the-hole hammer drill, which solves the aforementioned problems.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an improved photovoltaic drilling rig down-the-hole hammer drill, comprising a down-the-hole hammer drill rod, a down-the-hole hammer body fixedly installed at the bottom of the down-the-hole hammer drill rod, a down-the-hole hammer head fixedly installed at the bottom of the down-the-hole hammer body, an accessory assembly provided on the outer side of the down-the-hole hammer drill rod, the accessory assembly including an additional sleeve, the additional sleeve being sleeved on the outer side of the down-the-hole hammer drill rod, the sum of the lengths of the down-the-hole hammer body and the additional sleeve being greater than the depth of the pile hole, the outer diameter of the additional sleeve being the same as the outer diameter of the down-the-hole hammer body, and the distance between the outer wall of the additional sleeve and the down-the-hole hammer body and the hole wall being the same.
[0007] Preferably, a fixing plate is fixedly installed on the top of the additional sleeve, and a threaded cylinder is inserted between adjacent fixing plates, with a screw threaded inside the threaded cylinder.
[0008] Preferably, a first nut head is fixedly installed on the outer end of the threaded cylinder, and a second nut head is fixedly installed on the outer end of the screw, with the first nut head and the second nut head respectively abutting against the outer side of the corresponding fixing plate.
[0009] Preferably, the additional sleeve is a quarter-cylinder, and four additional sleeves form a complete cylinder and are fitted onto the outside of the down-the-hole hammer drill rod at the top of the down-the-hole hammer body.
[0010] Preferably, the down-the-hole hammer drill rod is connected to the drilling rig body, and the drilling rig body provides power to the down-the-hole hammer drill rod.
[0011] Preferably, the additional sleeve is made of stainless steel with good wear resistance to ensure its integrity under long-term soil impact.
[0012] Beneficial effects
[0013] This invention provides an improved down-the-hole hammer drill for photovoltaic drilling rigs. Compared with existing technologies, it has the following advantages:
[0014] 1. This improved photovoltaic drilling rig uses a down-the-hole hammer drill. By increasing the outer wall length of the down-the-hole hammer body to exceed the designed pile length, and by using welding to connect the additional casing and welding steel bars to support the stability of the casing, the gap between the outer wall of the down-the-hole hammer drill rod and the pile hole wall is reduced. This ensures that the cross-section is the same wherever the airflow passes, thereby increasing the gas velocity and pressure. This allows for the one-time removal of loose soil at the bottom of the hole, improving the cleaning effect at the bottom of the hole and effectively improving the construction quality.
[0015] 2. The accessory sleeve is fixed by the fixing plate. When fixing, the screw is screwed into the inside of the threaded cylinder, and the accessory sleeve is fixed by the first nut head and the second nut head. This fixing method can easily replace accessory sleeves of different lengths, thus making it applicable to pile holes of more depths. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a perspective view of the external structure of this utility model;
[0018] Figure 2 This is a three-dimensional view of the overall structure of this utility model;
[0019] Figure 3 This is the utility model Figure 2 Enlarged view of the structure at point A in the middle;
[0020] Figure 4 This is a three-dimensional view of the internal structure of this utility model;
[0021] Figure 5 This is a three-dimensional sectional view of the internal structure of this utility model.
[0022] In the diagram: 1. Down-the-hole hammer drill rod; 2. Accessory assembly; 21. Additional sleeve; 22. Fixing plate; 23. Threaded cylinder; 24. First nut head; 25. Screw; 26. Second nut head; 3. Down-the-hole hammer body; 4. Down-the-hole hammer head; 5. Pit hole; 6. Hole wall. Detailed Implementation
[0023] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0024] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.
[0025] Reference Figures 1 to 5 This application provides an improved photovoltaic drilling rig down-the-hole hammer drill, including a down-the-hole hammer drill rod 1. A down-the-hole hammer body 3 is fixedly installed at the bottom of the down-the-hole hammer drill rod 1, and a down-the-hole hammer head 4 is fixedly installed at the bottom of the down-the-hole hammer body 3. An accessory assembly 2 is provided on the outside of the down-the-hole hammer drill rod 1. The accessory assembly 2 includes an additional sleeve 21, which is sleeved on the outside of the down-the-hole hammer drill rod 1. The sum of the lengths of the down-the-hole hammer body 3 and the additional sleeve 21 is greater than the depth of the pile hole 5. The outer diameter of the additional sleeve 21 is the same as the outer diameter of the down-the-hole hammer body 3. The distance between the outer walls of the additional sleeve 21 and the down-the-hole hammer body 3 and the hole wall 6 is the same. A fixing plate 22 is fixedly installed at the top of the additional sleeve 21. A threaded cylinder 23 is inserted between adjacent fixing plates 22, and a screw 25 is screwed into the inside of the threaded cylinder 23. A first nut head 24 is fixedly installed on the outer end of the threaded cylinder 23, and a second nut head 26 is fixedly installed on the outer end of the screw 25. The first nut head 24 and the second nut head 26 are respectively attached to the outer side of the corresponding fixing plate 22. The auxiliary sleeve 21 is a quarter-cylinder, and four auxiliary sleeves 21 form a complete cylinder and are sleeved on the outside of the top of the down-the-hole hammer drill rod 1 of the down-the-hole hammer body 3. The down-the-hole hammer drill rod 1 is connected to the drilling machine body, and the drilling machine body provides power to the down-the-hole hammer drill rod 1. The auxiliary sleeves 21 are made of stainless steel with good wear resistance to ensure that they remain intact under long-term soil impact.
[0026] In this embodiment, by installing the accessory sleeve 21 above the down-the-hole hammer body 3, the added sleeve portion reduces the gap between the outer wall of the down-the-hole hammer drill rod 1 and the pile hole wall 6, ensuring that the cross-section remains the same when the airflow passes between the outer wall of the accessory sleeve 21 and the pile hole wall 6. With a constant air supply, according to fluid mechanics principles, the reduced air passage cross-section leads to an increase in gas velocity and pressure. This increased gas velocity and pressure are used to remove drill cuttings from the hole, achieving the purpose of cleaning the loose soil at the bottom of the hole in one go.
[0027] When the auxiliary sleeve 21 is installed on the outside of the down-the-hole hammer drill rod 1, the auxiliary sleeve 21 is fixed by the fixing plate 22. When fixing, the auxiliary sleeve 21 is fixed by screwing the screw 25 into the threaded cylinder 23 and then by the first nut head 24 and the second nut head 26. This fixing method can facilitate the replacement of auxiliary sleeves 21 of different lengths, thus making it applicable to pile holes 5 of more depths.
[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0029] Working principle: By installing the accessory sleeve 21 above the down-the-hole hammer body 3, the added sleeve reduces the gap between the outer wall of the down-the-hole hammer drill rod 1 and the pile hole wall 6, ensuring that the airflow maintains a constant cross-section when passing between the outer wall of the accessory sleeve 21 and the pile hole wall 6. With a constant air supply, according to fluid mechanics principles, the reduced airflow cross-section leads to an increase in gas velocity and pressure. This increased gas velocity and pressure then remove drill cuttings from the hole, achieving the goal of cleaning the loose soil at the bottom of the hole in one operation.
[0030] When the auxiliary sleeve 21 is installed on the outside of the down-the-hole hammer drill rod 1, the auxiliary sleeve 21 is fixed by the fixing plate 22. When fixing, the auxiliary sleeve 21 is fixed by screwing the screw 25 into the threaded cylinder 23 and then by the first nut head 24 and the second nut head 26. This fixing method can facilitate the replacement of auxiliary sleeves 21 of different lengths, thus making it applicable to pile holes 5 of more depths.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An improved photovoltaic drilling rig down-the-hole hammer drill, comprising a down-the-hole hammer drill rod (1), characterized in that: The bottom of the down-the-hole hammer drill rod (1) is fixedly installed with a down-the-hole hammer body (3), and the bottom of the down-the-hole hammer body (3) is fixedly installed with a down-the-hole hammer head (4). An accessory assembly (2) is provided on the outside of the down-the-hole hammer drill rod (1). The accessory assembly (2) includes an additional sleeve (21). The additional sleeve (21) is sleeved on the outside of the down-the-hole hammer drill rod (1). The sum of the lengths of the down-the-hole hammer body (3) and the additional sleeve (21) is greater than the depth of the pile hole (5). The outer diameter of the additional sleeve (21) is the same as the outer diameter of the down-the-hole hammer body (3). The distance between the outer wall of the additional sleeve (21), the down-the-hole hammer body (3) and the hole wall (6) is the same.
2. The improved photovoltaic drilling rig down-the-hole hammer drill according to claim 1, characterized in that: A fixing plate (22) is fixedly installed on the top of the additional sleeve (21), and a threaded cylinder (23) is inserted between adjacent fixing plates (22). A screw rod (25) is screwed into the inside of the threaded cylinder (23).
3. The improved photovoltaic drilling rig down-the-hole hammer drill according to claim 2, characterized in that: The outer end of the threaded cylinder (23) is fixedly installed with a first nut head (24), and the outer end of the screw (25) is fixedly installed with a second nut head (26). The first nut head (24) and the second nut head (26) are respectively attached to the outer side of the corresponding fixing plate (22).
4. The improved photovoltaic drilling rig down-the-hole hammer drill according to claim 1, characterized in that: The additional sleeve (21) is a quarter cylinder. The four additional sleeves (21) form a complete cylinder and are sleeved on the outside of the top of the downhole hammer drill rod (1) of the downhole hammer body (3).
5. An improved photovoltaic drilling rig down-the-hole hammer drill according to claim 1, characterized in that: The down-the-hole hammer drill rod (1) is connected to the drill body, and the drill body provides power to the down-the-hole hammer drill rod (1).
6. An improved photovoltaic drilling rig down-the-hole hammer drill according to claim 1, characterized in that: The additional sleeve (21) is made of stainless steel with good wear resistance, ensuring that it remains intact under long-term soil impact.