Cast-in-place pile drilling tool for wind power pile foundation construction

Abstract

The utility model relates to the technical field of pile foundation construction, and discloses a cast-in-place pile drilling tool for wind power pile foundation construction, which comprises a drill rod and a drill bit, a plugging support plate is arranged on a drill bit shell, a screw shaft is connected onto the plugging support plate in a sliding manner, and a screw blade and a bottom shell are arranged on the screw shaft. Through the arrangement of the trimming assembly, when the drill rod rotates and pulls the drill bit upwards, the trimming head can synchronously revolve along with the drill bit shell to start trimming the hole wall, the hole wall does not need to be trimmed independently, and the operation efficiency is greatly improved; a trimming motor, a first bevel gear and a second bevel gear are arranged, so that a trimming head can rotate while revolving, and the trimming quality of the trimming head on the hole wall is further improved; and through the arrangement of the bottom shell and the external threads, when the drill bit shell is pulled upwards, the cleaning holes can be automatically staggered from the spiral blades, so that soil loaded on the spiral blades is prevented from leaking out along the cleaning holes, and the cleaning efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a cast-in-place pile drilling tool used for wind power pile foundation construction. Background Art

[0002] The bored piles used in wind turbine foundation construction are an indispensable component of wind power infrastructure. By forming a reinforced concrete pile deep underground, bored piles provide stable and sturdy support for wind turbine towers. These piles must not only withstand the weight of the tower itself, but also withstand the effects of wind and other natural environmental factors, such as earthquakes and stress from varying soil types. In this context, drilling tools play an especially crucial role. Drilling tools, including drill rods, drill bits, and related expansion equipment, are crucial for achieving precise drilling and ensuring hole quality. High-quality drilling ensures that the pile foundation geometry and strength meet design requirements when concrete is poured.

[0003] When the drilling depth reaches the predetermined value, a hole cleaning drill bit is generally used to clean the loose soil at the bottom of the hole and trim the hole wall to ensure the quality of subsequent concrete pouring. However, existing drilling tools usually perform these operations sequentially, resulting in low work efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a bored pile drilling tool for wind power pile foundation construction, which solves the problem that the existing drilling tool cannot simultaneously perform the cleaning operation of the bottom of the hole and the trimming operation of the hole wall, resulting in low efficiency.

[0005] The utility model is realized through the following technical scheme: a bored pile drill for wind power pile foundation construction, comprising a drill rod, a drill bit housing, a connecting pin, and a connecting head, wherein the connecting head is mounted on the drill bit housing, the drill rod is connected to the connecting head through the connecting pin, a blocking support plate is mounted on the drill bit housing, a spiral shaft is slidably connected to the blocking support plate, a spiral blade and a bottom shell are mounted on the spiral shaft, and a cleaning hole is opened on the bottom shell.

[0006] A trimming assembly for trimming the hole wall is installed on the blocking support plate, and the trimming assembly includes a plurality of trimming rods installed on the blocking support plate and an inverted frustum installed on the spiral shaft. A return spring is provided between the inverted frustum and the blocking support plate, and the trimming rod cooperates with the inverted frustum. A reserved hole is provided on the side wall of the drill bit housing, and the trimming rod passes through the reserved hole. A trimming head is detachably mounted on the trimming rod.

[0007] After the hole cleaning operation is completed, as the drill rod rotates and pulls the drill bit housing upward, the dressing rod begins to extend out of the drill bit housing, and the dressing head begins to dress the hole wall.

[0008] In order to better realize the present utility model, the trimming assembly further includes a trimming motor, a first bevel gear, and a second bevel gear. The trimming motor is installed on the connecting head, the first bevel gear is installed on the output end of the trimming motor, the second bevel gear is rotatably connected to the blocking support plate, the trimming rod is slidably connected to the second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0009] In order to better realize the present invention, further, the side wall of the bottom shell is provided with an external thread, the external thread is engaged with the internal thread provided on the inner wall of the drill shell, and the bottom shell is rotatably connected to the screw shaft.

[0010] In order to better realize the present invention, further, the outer side wall of the drill housing is provided with a plurality of protective strips, and the protective strips are spiral-shaped.

[0011] In order to better implement the present invention, further, a plurality of reinforcing ribs are provided between the connecting head and the drill housing.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] (1) The utility model provides a trimming assembly. After the hole cleaning operation is completed, when the drill rod rotates and the drill bit is pulled upward, the trimming head will follow the drill bit housing to synchronize its revolution and start trimming the hole wall. There is no need to trim the hole wall separately, which greatly improves the operation efficiency.

[0014] (2) The utility model provides a dressing motor, a first bevel gear, and a second bevel gear, so that the dressing head can rotate while revolving, thereby further improving the dressing quality of the hole wall by the dressing head;

[0015] (3) The present invention provides a bottom shell and an external thread. When the drill bit housing is pulled upward, the cleaning hole will automatically be staggered with the spiral blade, thereby preventing the soil loaded on the spiral blade from leaking out through the cleaning hole, thereby ensuring cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a cross-sectional view of the overall structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 4 It is a schematic diagram of the inverted cone and the first bevel gear structure.

[0020] Figure 5 This is a schematic diagram of the trimming rod and trimming head structure.

[0021] Figure 6 This is a schematic diagram of the bottom shell, external thread, and cleaning hole structure.

[0022] Among them: 2-dressing assembly; 101-drill rod; 102-drill bit housing; 103-connecting pin; 104-connecting head; 105-reinforcement rib; 106-protective strip; 107-bottom shell; 108-spiral blade; 109-spiral shaft; 110-sealing support plate; 111-external thread; 112-cleaning hole; 201-dressing rod; 202-dressing motor; 203-first bevel gear; 204-second bevel gear; 205-reset spring; 206-inverted cone; 207-dressing head. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] This embodiment provides a bored pile drilling tool for wind power pile foundation construction, specifically Figure 1-Figure 4 、 Figure 6 As shown, it includes a drill rod 101 and a drill bit. The drill bit includes a drill bit housing 102, a connecting pin 103, a connecting head 104, a bottom shell 107, a spiral blade 108, and a spiral shaft 109. The connecting head 104 is installed on the drill bit housing 102. The drill rod 101 is connected to the connecting head 104 through the connecting pin 103. A sealing support plate 110 is fixedly installed on the drill bit housing 102. The sealing support plate 110 is slidably connected to the spiral shaft 109. The spiral blade 108 and the bottom shell 107 are installed on the spiral shaft 109. A cleaning hole 112 is opened on the bottom shell 107.

[0027] After the drill rod 101 places the drill housing 102 at the bottom of the hole, the soil at the bottom of the hole supports the bottom housing 107. At the same time, the drill rod 101 drives the drill housing 102 to rotate through the connector 104. As the drill housing 102 rotates, the blocking support plate 110 rotates synchronously. The blocking support plate 110 drives the screw shaft 109 to rotate, and the screw shaft 109 drives the bottom housing 107 and the spiral blades 108 to rotate. At this time, the loose soil at the bottom of the hole begins to enter the drill housing 102 from the cleaning hole 112 and is continuously transported by the spiral blades 108 toward the blocking support plate 110 until the soil fills the interior of the drill housing 102. The drill rod 101 then lifts the drill housing 102 to clean the loose soil at the bottom of the pile hole.

[0028] like Figure 2-Figure 5 As shown, a trimming assembly 2 for trimming the hole wall is installed on the sealing support plate 110, and the trimming assembly 2 includes a plurality of trimming rods 201 installed on the sealing support plate 110, and an inverted cone 206 installed on the spiral shaft 109. A return spring 205 is provided between the inverted cone 206 and the sealing support plate 110. The trimming rod 201 cooperates with the inverted cone 206. A reserved hole is provided on the side wall of the drill bit housing 102, and the trimming rod 201 passes through the reserved hole. A trimming head 207 is detachably mounted on the trimming rod 201.

[0029] After the hole cleaning operation is completed, when the drill rod 101 rotates and pulls the drill bit housing 102 upward, the bottom housing 107 loses the support of the soil at the bottom of the hole. Under the action of the loaded soil, the bottom housing 107, the spiral blade 108, and the spiral shaft 109 move downward as a whole, causing the return spring 205 to be compressed, and the inverted cone 206 begins to squeeze the end of the trimming rod 201. Therefore, the trimming rod 201 begins to extend out of the drill bit housing 102, and the trimming head 207 follows the drill bit housing 102 to revolve synchronously and start to trim the hole wall, thereby improving the hole quality.

[0030] Example 2:

[0031] This embodiment further expands the trimming component 2 based on the embodiment 1. Figure 2-Figure 4 As shown, the trimming assembly 2 also includes a trimming motor 202, a first bevel gear 203, and a second bevel gear 204. The trimming motor 202 is installed on the connecting head 104, the first bevel gear 203 is installed at the output end of the trimming motor 202, the second bevel gear 204 is rotatably connected to the blocking support plate 110, and the trimming rod 201 is slidably connected to the second bevel gear 204, and the second bevel gear 204 is engaged with the first bevel gear 203.

[0032] When the drill bit housing 102 is pulled upward and the dressing head 207 starts to revolve, the dressing motor 202 is started. At this time, the dressing motor 202 drives the first bevel gear 203 to rotate, and the first bevel gear 203 drives multiple second bevel gears 204 to rotate, and the second bevel gear 204 drives the dressing rod 201 to rotate. At this time, the dressing head 207 rotates synchronously with the dressing rod 201, that is, the dressing head 207 not only rotates but also revolves, thereby further improving the dressing quality of the hole wall by the dressing head 207.

[0033] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0034] Example 3:

[0035] This embodiment is further expanded on the basis of embodiment 1. Figure 2 、 Figure 6 As shown, the side wall of the bottom shell 107 is provided with an external thread 111, and the external thread 111 is engaged with the internal thread provided on the inner wall of the drill housing 102, and the bottom shell 107 is rotatably connected to the screw shaft 109.

[0036] When the drill housing 102 is pulled upward, under the action of the loaded soil, the bottom housing 107, the spiral blade 108, and the spiral shaft 109 move downward as a whole. Due to the meshing of the external thread 111 with the internal thread on the drill housing 102, the bottom housing 107 and the drill housing 102 will also rotate relative to each other when moving downward, that is, the bottom housing 107 will rotate on the spiral shaft 109, and at this time the cleaning hole 112 will be staggered with the spiral blade 108, so as to prevent the soil loaded on the spiral blade 108 from leaking out through the cleaning hole 112; after the drill housing 102 is lifted above the ground, the drill housing 102 is placed on the protrusion, at this time the bottom housing 107 is supported, the bottom housing 107 and the return spring 205 are reset, the trimming rod 201 is retracted into the drill housing 102, and the cleaning hole 112 is engaged with the spiral blade 108 again. At this time, the drill housing 102 can be shaken to discharge the soil collected in the drill housing 102.

[0037] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0038] Example 4:

[0039] This embodiment is further expanded on the basis of embodiment 1. Figure 1 As shown, the outer wall of the drill housing 102 is provided with a plurality of protection strips 106 , and the protection strips 106 are spiral-shaped.

[0040] The provision of the protection strip 106 can provide a protective effect, preventing the outer peripheral wall of the drill housing 102 from being excessively worn. The threaded protection strip 106 can reduce the friction force when the drill housing 102 rotates, making it more conducive to the rotation and soil cleaning of the drill bit.

[0041] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0042] Example 5:

[0043] This embodiment is further expanded on the basis of embodiment 1. Figure 1 As shown, a plurality of reinforcing ribs 105 are provided between the connecting head 104 and the drill housing 102 .

[0044] The provision of multiple reinforcing ribs 105 can strengthen the connection strength between the drill housing 102 and the connector 104, thereby preventing connection deformation caused by low strength between the connector 104 and the drill housing 102 when the drill rod 101 drives the connector 104 to rotate.

[0045] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A bored pile drilling tool for wind power pile foundation construction, comprising a drill rod (101), a drill bit housing (102), a connecting pin (103), and a connecting head (104), wherein the connecting head (104) is mounted on the drill bit housing (102), and the drill rod (101) is connected to the connecting head (104) via the connecting pin (103), characterized in that: A blocking support plate (110) is mounted on the drill housing (102), a screw shaft (109) is slidably connected to the blocking support plate (110), a screw blade (108) and a bottom shell (107) are mounted on the screw shaft (109), and a cleaning hole (112) is opened on the bottom shell (107); A trimming assembly (2) for trimming the hole wall is installed on the blocking support plate (110), the trimming assembly (2) comprising a plurality of trimming rods (201) mounted on the blocking support plate (110), an inverted cone (206) mounted on the spiral shaft (109), a return spring (205) being provided between the inverted cone (206) and the blocking support plate (110), the trimming rods (201) being mated with the inverted cone (206), a reserved hole being provided on the side wall of the drill housing (102), the trimming rods (201) passing through the reserved hole, and a trimming head (207) being detachably mounted on the trimming rods (201); After the hole cleaning operation is completed, as the drill rod (101) rotates and pulls the drill housing (102) upward, the trimming rod (201) begins to extend out of the drill housing (102), and the trimming head (207) begins to trim the hole wall.

2. The bored pile drilling tool for wind power pile foundation construction according to claim 1, characterized in that: The trimming assembly (2) further comprises a trimming motor (202), a first bevel gear (203), and a second bevel gear (204); the trimming motor (202) is mounted on the connector (104); the first bevel gear (203) is mounted on the output end of the trimming motor (202); the second bevel gear (204) is rotatably connected to the blocking support plate (110); the trimming rod (201) is slidably connected to the second bevel gear (204); and the second bevel gear (204) is meshed with the first bevel gear (203).

3. The bored pile drilling tool for wind power pile foundation construction according to claim 1, characterized in that: The side wall of the bottom shell (107) is provided with an external thread (111), and the external thread (111) is engaged with the internal thread provided on the inner wall of the drill bit housing (102). The bottom shell (107) is rotatably connected to the screw shaft (109).

4. The bored pile drilling tool for wind power pile foundation construction according to claim 1, characterized in that: The outer side wall of the drill housing (102) is provided with a plurality of protection strips (106), and the protection strips (106) are spiral-shaped.

5. The bored pile drilling tool for wind power pile foundation construction according to claim 1, characterized in that: A plurality of reinforcing ribs (105) are provided between the connecting head (104) and the drill housing (102).

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