Mechanical device for assisting in forming square groove in rotary excavating pile hole
By designing a mechanical device for rotary digging pile holes, the arc-shaped residual slag in the deep seepage trench is used to cut off the arc-shaped residual slag in the deep seepage trench construction, the problems of hole collapse risk and low construction efficiency in the construction of the deep seepage trench are solved, and efficient and reliable edge trimming effect is achieved.
Patent Information
- Application Number
- CN202421929501.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the trough-forming construction of deep seepage cutters, the prior art is difficult to effectively remove arc residual slag, which affects the connectivity and trough width of square troughs, and there are problems of risk of collapse and low construction efficiency.
A mechanical device including a drill rod sleeve, a fixed seat and an arc-shaped cutting knife is designed. It is connected to the rotary drill rod through the drill rod sleeve, which drives the arc-shaped cutting knife to move downward, cut off the arc-shaped residual residue, and falls into the pile hole between the joint tubes to achieve the trimming of the square groove.
Effectively reduce or even avoid the risk of hole collapse, improve the trimming quality and groove formation efficiency, simplify the construction process and reduce costs.
Smart Images
Figure CN222878789U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pile hole construction, and specifically relates to a mechanical device for assisting rotary excavation of pile holes to open square grooves, which has simple structure, high efficiency, high reliability and good trimming quality. Background Art
[0002] Intercepting ditches refer to drainage ditches built to intercept groundwater flowing from the outside to the protected area. At present, intercepting ditches are commonly used for groundwater pollution control in mines and slag storages. For deeper underground gravel intercepting ditches (walls), if trenching machines are used, there are problems such as low construction efficiency, high cost and inability to operate on slopes; and when trenching is done with long-arm excavators, the trenching depth cannot be guaranteed, and it cannot be implemented when excavating in rock formations. In addition to the above problems, the above two methods have a fatal disadvantage, that is, the stability of the trench wall cannot be guaranteed during the trenching process. For this reason, it is usually necessary to support both sides of the trench wall before excavation, which will lead to high costs and slow construction speed.
[0003] As a common hole-making equipment for underground engineering piles and underground seepage cut-off ditches, rotary drilling rigs have been widely used in the construction of various construction engineering pile foundations, municipal engineering and other fields due to their many advantages such as high efficiency and environmental protection, fast hole-making speed, high degree of mechanization, easy operation, comfort, and convenient on-site displacement. However, since rotary drilling rigs usually rely on rotating movements to complete the drilling of pile holes, when encountering seepage cut-off ditches that require square grooves, square groove impactors are generally used instead of drill bits. Among them, the existing impactors are to set the drilling cylinder into a square shape, and arrange multiple sub-dth hammers in a rectangular array inside it, and complete the drilling of square holes based on this structure. However, this type of impactor completes the drilling of square holes through the impact of the sub-dth hammers. Not only is the drilling efficiency relatively low, but the hole wall after the hole is formed will still be convex due to the gap between the sub-dth hammers, so that the shallow grooves still need to be manually trimmed after the drilling is completed, and the deep grooves cannot be manually trimmed, resulting in poor groove quality. For this purpose, the prior art also has a drilling device including a rotary drive mechanism and a drilling mechanism, wherein the rotary drive mechanism is connected to the drill rod, and the first connector of the rotary drive mechanism is driven to rotate through the drill rod, thereby driving the connecting plate and the positioning plate to rotate, and finally driving the rotary shaft to rotate eccentrically around the axis of the drill rod, and at the same time, the rotary shaft can rotate on its own under the meshing action of the inner teeth and the outer teeth, thereby driving the main body of the drilling mechanism to rotate eccentrically and rotate on its own, and with the design that the main body cross section is a Lello triangle, the main body can complete the drilling construction of the square pile hole through the down-the-hole hammer, so that the drilling construction of the square pile hole can be completed in one drilling without trimming or other operations, which significantly improves the grooving efficiency of the square groove. However, for deep seepage trenches with a trench depth exceeding 8m, due to the large lateral pressure on the side wall of the trench, if the impact drilling of the rotary drilling rig or the continuous drilling of the drilling device is used, it is easy to cause the risk of hole collapse. To this end, the inventors have proposed a construction process of skipping holes, rotary drilling, and inserting rigid joint pipes at intervals into pile holes. Skipping holes, rotary drilling, and inserting tangent holes can reduce or even eliminate the risk of hole collapse during continuous hole construction, and the joint pipe can support the hole wall. In addition, the scheme of inserting rigid joint pipes at intervals into pile holes can significantly reduce the construction volume and the amount of joint pipes used compared to inserting joint pipes into each hole. This is particularly suitable for trenching of deep seepage intercepting ditches. However, due to the presence of arc-shaped residual debris between two adjacent joint pipes, the connectivity and trenching width of the square trench of the seepage intercepting ditch are affected. Therefore, in view of the inadequacies of the construction process of skipping holes, rotary drilling, and inserting joint pipes at intervals into pile holes proposed by the applicant, how to improve the construction efficiency of trenching while meeting the quality of the project has become an urgent problem to be solved. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model develops a mechanical device for assisting rotary drilling of pile holes to open square grooves, which has the advantages of simple structure, high efficiency, high reliability and good trimming quality.
[0005] The utility model is implemented as follows: it comprises a drill rod sleeve, a fixing seat, and an arc-shaped cutter, wherein the drill rod sleeve is a hollow columnar structure which is vertically arranged and has an open top, the drill rod sleeve can be slidably connected with a rotary drilling rod through the opening, a connecting hole corresponding to the rotary drilling rod is penetrated on the side wall of the drill rod sleeve, one side of the fixing seat is fixedly connected with the bottom end of the drill rod sleeve away from the opening, the arc-shaped cutter is fixedly arranged at the other end of the fixing seat away from the drill rod sleeve, and the central axis of the arc-shaped surface of the arc-shaped cutter is parallel to the central axis of the hollow cylindrical surface of the drill rod sleeve.
[0006] Furthermore, a cutting edge is provided at the lower part of the arc-shaped cutter close to the drill pipe sleeve.
[0007] Furthermore, a guide surface which is inclined upward from a side close to the arc-shaped cutter to a side of the drill rod sleeve is provided at the bottom end of the fixing seat away from the drill rod sleeve.
[0008] Furthermore, the fixing seat is a rectangular or trapezoidal hollow structure, a discharge port is provided at the bottom of the fixing seat and / or at the end away from the arc cutter, and a material guide hole connected to the interior of the fixing seat is provided on the arc surface.
[0009] Furthermore, at least two connection holes corresponding to the rotary drilling rod are arranged at intervals through the front and rear side walls and / or the left and right side walls of the drill rod sleeve.
[0010] Furthermore, the connecting holes on the front and rear side walls and the left and right side walls of the drill pipe sleeve are staggered in the vertical direction.
[0011] Furthermore, a top seat cooperating with the rotary drilling rod is fixedly provided at the top end of the drill rod sleeve, and a through hole corresponding to the opening of the drill rod sleeve is provided in the middle of the top seat.
[0012] Furthermore, at least two countersunk holes are arranged at intervals on the arc surface, and one end of the fixing seat abutting the arc cutter is provided with a screw hole corresponding to the countersunk hole on the arc surface, and the arc cutter is fixedly connected to the fixing seat by a screw passing through the countersunk hole and cooperating with the screw hole.
[0013] Furthermore, a rib plate I is fixedly arranged between the top end of the fixing seat and the outer wall of the drill pipe sleeve.
[0014] Furthermore, the drill pipe sleeve is a vertically arranged hollow square column structure, the connecting hole is arranged in the middle of the outer wall of the drill pipe sleeve facing the arc cutter, and the two ribs I are symmetrically arranged on both sides of the connecting hole on the outer wall of the drill pipe sleeve facing the arc cutter.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The mechanical device of the utility model is provided with a drill pipe sleeve connected to the drill pipe of the rotary drilling machine, so that the arc cutter is aligned with the arc residual slag position on the side of the joint pipe and the rear side is suspended, and then the drill pipe is pressed downward to push the drill pipe sleeve to drive the arc cutter on the fixed seat to move downward, so that the arc cutter cuts off the arc residual slag and drops it into the pile hole between the two joint pipes during the downward advance of the arc cutter, and finally a conventional drill bit is used to salvage the residual slag in the square groove, so as to achieve the purpose of trimming the residual slag in the square groove, which can not only reduce or even avoid the risk of hole collapse, but also do not need manual trimming, and can also improve the quality of the trimmed square groove.
[0017] 2. The utility model adopts a fully mechanical fixed connection structure. Compared with the motion mechanisms in the prior art such as the sub-down-the-hole hammer of the impactor and the rotary drive mechanism of the drilling device, the overall structure is simple and the reliability is higher. Moreover, the method of cutting the arc-shaped residual soil on one side and dropping it into the pile hole between the two joint pipes is adopted. Compared with the impactor that directly impacts to form a square groove, the cutting resistance is smaller, so the grooving efficiency is higher. Moreover, the arc-shaped residual soil on the side of the joint pipe is directly cut by downward pressure, which can avoid the influence of the rigid joint pipe on the removal of the arc-shaped residual soil. Compared with the rotary cutting drilling device, it is more suitable for the grooving construction of deep interception seepage trenches.
[0018] In summary, the utility model has the characteristics of simple structure, high efficiency, high reliability and good trimming quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 for Figure 1 Left rear view;
[0021] Figure 3 for Figure 1 A top view of
[0022] Figure 4 for Figure 3 AA section view;
[0023] In the figure: 1-drill pipe sleeve, 11-connecting hole, 2-fixed seat, 21-guide surface, 22-discharging port, 3-arc cutter, 31-arc surface, 32-cutting edge, 33-guide hole, 4-top seat, 5-rib plate I, 6-rib plate II. DETAILED DESCRIPTION
[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.
[0025] like Figures 1 to 4As shown, the utility model includes a drill pipe sleeve 1, a fixed seat 2, and an arc cutter 3. The drill pipe sleeve 1 is a hollow cylindrical structure which is vertically arranged and open at the top. The drill pipe sleeve 1 can be slidably connected with the rotary drilling drill pipe through the opening. A connecting hole 11 corresponding to the rotary drilling drill pipe is penetrated on the side wall of the drill pipe sleeve 1. One side of the fixed seat 2 is fixedly connected to the bottom end of the drill pipe sleeve 1 away from the opening. The arc cutter 3 is fixedly arranged on the other end of the fixed seat 2 away from the drill pipe sleeve 1. The central axis of the arc surface 31 of the arc cutter 3 is parallel to the central axis of the hollow cylindrical surface of the drill pipe sleeve 1.
[0026] A cutting edge 32 is provided at the lower part of the arc cutter 3 near the drill pipe sleeve 1 .
[0027] The bottom end of the fixing seat 2 away from the drill pipe sleeve 1 is provided with a guide surface 21 which is inclined upward from the side close to the arc cutter 3 to the side of the drill pipe sleeve 1. The guide surface 21 is used to guide the arc-shaped residual soil cut by the arc cutter 3 into the pile hole between the two joint pipes, thereby reducing the resistance acting on the arc cutter 3.
[0028] The fixing seat 2 is a rectangular or trapezoidal hollow structure. A discharge port 22 is provided at the bottom of the fixing seat 2 and / or at the end away from the arc cutter 3 . A material guide hole 33 communicating with the interior of the fixing seat 2 is provided on the arc surface 31 .
[0029] At least two connection holes 11 corresponding to the rotary drilling rod are arranged at intervals on the front and rear side walls and / or the left and right side walls of the drill rod sleeve 1. The drill rod sleeve 1 can be fixedly connected to the rotary drilling rod by a pin passing through the connection holes 11 and the corresponding pin holes on the rotary drilling rod, and the swing of the drill rod sleeve 1 relative to the rotary drilling rod can be limited, thereby improving the trimming quality.
[0030] The connecting holes 11 on the front and rear side walls and the left and right side walls of the drill pipe sleeve 1 are staggered in the vertical direction.
[0031] A top seat 4 cooperating with the rotary drilling rod is fixedly provided at the top end of the drill rod sleeve 1 , and a through hole corresponding to the opening of the drill rod sleeve 1 is provided in the middle of the top seat 4 .
[0032] At least two countersunk holes are arranged at intervals on the arc surface 31, and a screw hole corresponding to the countersunk hole on the arc surface 31 is arranged at one end of the fixing seat 2 abutting against the arc cutter 3, and the arc cutter 3 is fixedly connected to the fixing seat 2 by a screw passing through the countersunk hole and cooperating with the screw hole. The arc cutter 3 is connected to the fixing seat 2 by the screw, which is convenient for replacing the deformed arc cutter 3 and the arc cutter 3 whose cutting edge 32 needs to be sharpened, and the arc cutter 3 corresponding to the rotation diameter can be replaced according to the different sizes of the joint pipe, thereby improving the flexibility of application and reducing the application cost of the mechanical device.
[0033] A rib plate Ⅰ5 is fixedly arranged between the top end of the fixing seat 2 and the outer wall of the drill pipe sleeve 1.
[0034] The drill pipe sleeve 1 is a vertically arranged hollow square column structure, the connecting hole 11 is arranged in the middle of the outer wall of the drill pipe sleeve 1 facing the arc cutter 3, and the two ribs Ⅰ5 are symmetrically arranged on both sides of the connecting hole 11 on the outer wall of the drill pipe sleeve 1 facing the arc cutter 3.
[0035] Ribs II 6 are fixedly arranged between the two side surfaces of the fixing seat 2 and the rear end surface of the arc cutter 3 away from the arc surface 31 .
[0036] The working principle and working process of this utility model:
[0037] like Figures 1 to 4 As shown, before trimming, according to the size of the pre-trimmed joint pipe, select the arc cutter 3 with a suitable rotation diameter of the arc surface 31, and then fix the selected arc cutter 3 to the fixed seat 2 by means of a screw passing through the countersunk hole, and then fix the drill pipe sleeve 1 to the rotary drilling pipe by means of a pin shaft passing through the connecting hole 11 and the corresponding pin hole on the rotary drilling pipe.
[0038] During rotary drilling, the arc cutter 3 must first be aligned with the arc residual slag position on one side of the joint pipe, and the drill pipe sleeve 1 is suspended, and then the drill pipe is pressed downward by the rotary drilling rig to push the drill pipe sleeve 1 to drive the arc cutter 3 on the fixed seat 2 to move downward, so that the arc cutter 3 cuts off the circular arc residual slag during the downward advancement process, and the cut slag enters the pile hole between the two joint pipes under the guidance of the guide surface 21. After the arc residual slag on one side of the joint pipe is cut, the rotary drilling drill pipe is raised upward and the conventional drill bit is replaced, and then the cut slag is salvaged by the rotary drilling rig, so that the trimming and removal of the slag on one side can be achieved; then the mechanical device of the present invention is replaced as described above, and the arc cutter 3 is aligned with the arc residual slag position on the other side of the joint pipe, and the arc residual slag is cut and subsequently removed again as described above, so that a square groove can be formed in the pile hole between the two joint pipes.
[0039] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A mechanical device for assisting in drilling square grooves in pile holes, characterized in that: The invention comprises a drill pipe sleeve (1), a fixing seat (2), and an arc-shaped cutter (3); the drill pipe sleeve (1) is a hollow columnar structure which is arranged vertically and has an open top; the drill pipe sleeve (1) can be slidably connected to a rotary drilling pipe through the open top; a connecting hole (11) corresponding to the rotary drilling pipe is penetrated through the side wall of the drill pipe sleeve (1); one side of the fixing seat (2) is fixedly connected to the bottom end of the drill pipe sleeve (1) away from the open top; the arc-shaped cutter (3) is fixedly arranged at the other end of the fixing seat (2) away from the drill pipe sleeve (1); and the central axis of the arc-shaped surface (31) of the arc-shaped cutter (3) is parallel to the central axis of the hollow cylindrical surface of the drill pipe sleeve (1).
2. The mechanical device for assisting in drilling square grooves in pile holes according to claim 1, characterized in that: A cutting edge (32) is provided on the lower part of the arc-shaped cutter (3) close to the drill rod sleeve (1).
3. The mechanical device for assisting in drilling square grooves in pile holes according to claim 2, characterized in that: A guide surface (21) is provided at the bottom end of the fixing seat (2) away from the drill rod sleeve (1), the guide surface being inclined upward from the side close to the arc-shaped cutter (3) to the side of the drill rod sleeve (1).
4. The mechanical device for assisting in drilling square grooves in pile holes according to claim 1, characterized in that: The fixing seat (2) is a rectangular or trapezoidal hollow structure, a discharge port (22) is provided at the bottom of the fixing seat (2) and / or at the end away from the arc-shaped cutter (3), and a material guide hole (33) communicating with the interior of the fixing seat (2) is provided on the arc-shaped surface (31).
5. The mechanical device for assisting in drilling square grooves in pile holes according to claim 1, characterized in that: At least two connection holes (11) corresponding to the rotary drilling rods are arranged at intervals through the front and rear side walls and / or the left and right side walls of the drill rod sleeve (1).
6. The mechanical device for assisting in drilling square grooves in pile holes according to claim 5, characterized in that: The connection holes (11) on the front and rear side walls and the left and right side walls of the drill rod sleeve (1) are staggered in the vertical direction.
7. The mechanical device for assisting in drilling square grooves in pile holes according to claim 1, characterized in that: A top seat (4) cooperating with the rotary drilling rod is fixedly provided at the top end of the drill rod sleeve (1), and a through hole corresponding to the opening of the drill rod sleeve (1) is provided in the middle of the top seat (4).
8. The mechanical device for assisting in drilling square grooves in pile holes according to claim 1, characterized in that: At least two countersunk holes are arranged at intervals on the arc surface (31); one end of the fixing seat (2) abutting against the arc cutter (3) is provided with a screw hole corresponding to the countersunk hole on the arc surface (31); the arc cutter (3) is fixedly connected to the fixing seat (2) by means of a screw that passes through the countersunk hole and cooperates with the screw hole.
9. The mechanical device for assisting in drilling square grooves in pile holes according to any one of claims 1 to 8, characterized in that: A rib plate I (5) is fixedly arranged between the top end of the fixing seat (2) and the outer wall of the drill pipe sleeve (1).
10. The mechanical device for assisting in drilling square grooves in pile holes according to claim 9, characterized in that: The drill rod sleeve (1) is a vertically arranged hollow square column structure, the connecting hole (11) is arranged in the middle of the outer wall of the drill rod sleeve (1) facing the arc cutter (3), and the two rib plates I (5) are symmetrically arranged on both sides of the connecting hole (11) on the outer wall of the drill rod sleeve (1) facing the arc cutter (3).