Anti-deviation device for rotary excavating drill bit

Abstract

The utility model discloses a rotary excavating drill bit deviation preventing device which comprises a protective cylinder arranged in the ground and with the top end higher than the ground, a fixing frame of a rectangular frame structure and with four telescopic edges, four clamping pieces arranged at the four corners of the fixing frame respectively and capable of being clamped on the side wall of the protective cylinder, and sliding sleeves fixedly connected to the upper ends of the clamping pieces. The positioning rods penetrate through the sliding sleeves in a sliding mode, the two telescopic pieces are parallel to each other and are adjustable in length, the locking pieces are arranged on the telescopic pieces and used for fixing the length of the telescopic pieces, the two ends of each telescopic piece are fixedly connected with the outer ends of the two positioning rods located on the same side respectively, and the four positioning rods are arranged in the diagonal direction of the fixing frame; the positioning device can be tightly fixed on the side walls of the pile casings with different diameters through the fixing frame and the clamping piece, the distance between the positioning rod and the circle center of the pile casing can be adjusted by adjusting the length of the telescopic piece, it is ensured that a drill bit coincides with the center line of a drill hole in the drilling process, and the drill bit is effectively prevented from deviating.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotary drilling pile construction technical field, concretely relates to a rotary drill bit anti-deviation device. BACKGROUND

[0002] The rotary drilling pile is formed by using the rotary drilling rig to drill a hole, placing a reinforcement cage in the hole and pouring concrete into the hole, and the construction quality and efficiency of the rotary drilling pile depend largely on the perpendicularity and accuracy of the hole drilled; the drilling operation of the rotary drilling pile is completed by manually operating the rotary drilling rig, and in the operation process, in order to prevent the hole wall from collapsing when the hole is drilled, isolate the surface water and protect the hole ground, a steel casing with a larger diameter than the hole drilled is buried before the hole is drilled, then the drill bit at the bottom of the rotary drilling rig cuts the soil and collects the cut soil into the drill bit, then the whole drill bit is lifted out of the hole through the lifting device on the drilling rig and the telescopic drill rod, and the unloading operation is performed outside the hole, and the cycle is repeated until the designed pile hole depth is reached.

[0003] In the drilling process, keeping the drill bit coinciding with the center line of the hole drilled is the key to ensuring the perpendicularity and accuracy of the cast-in-place pile, however, due to uneven stratum, inaccurate initial setting of the drilling angle of the drill bit, existence of boulders in the soil layer and other reasons, the rotary drill bit is prone to deviation, which not only leads to a decrease in the perpendicularity of the hole drilled, affects the uniformity and bearing capacity of the pile body, but also may cause serious quality problems such as hole wall collapse and pile body fracture, and further threatens the safety and stability of the whole project. SUMMARY

[0004] The utility model aims at providing a rotary drill bit anti-deviation device to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A rotary drill bit anti-deviation device, which comprises a casing buried in the ground and protruding above the ground, a fixed frame in the shape of a rectangular frame structure and having four sides that can be telescoped, four clamping pieces respectively arranged at the four corners of the fixed frame and capable of being clamped on the side wall of the casing, a sliding sleeve fixedly connected to the upper end of the clamping piece, a positioning rod slidingly penetrating through the sliding sleeve, two telescopic pieces that are parallel to each other and have adjustable lengths, and a locking piece arranged on the telescopic piece and used for fixing the length of the telescopic piece, wherein the two ends of the telescopic piece are respectively fixedly connected to the outer ends of the two positioning rods located on the same side, and the four positioning rods are arranged along the diagonal direction of the fixed frame.

[0007] Preferably, the inner end of the positioning rod is connected with an arc-shaped plate, and a plurality of rolling balls are arranged on the inner side surface of the arc-shaped plate.

[0008] Preferably, the clamping piece comprises: an internally hollow mounting box with an open front end, a first clamping plate located at the open front end of the mounting box, a connecting plate with one end connected to the top end of the first clamping plate and the other end connected to the mounting box, a second clamping plate with a top end slidingly connected to the inner side wall of the top of the mounting box, and an adjusting screw rod with one end rotationally connected to the second clamping plate and the other end threaded through the rear side wall of the mounting box.

[0009] Preferably, the second clamping plate and the first clamping plate are respectively provided with flexible rubber pads on the opposite sides.

[0010] Preferably, the fixing frame comprises four telescopic rods connected in sequence.

[0011] Preferably, the telescopic piece comprises: an internally hollow outer sleeve, and a movable rod slidingly connected in the outer sleeve, the locking piece is arranged at the end of the outer sleeve close to the movable rod, the locking piece comprises: a locking head fixedly connected to the end of the outer sleeve, a plurality of elastic locking pieces uniformly arranged at the end of the locking head, and a locking sleeve threadedly connected to the outer side of the locking head, one end of the locking sleeve is provided with a tapered cavity for folding the end of the plurality of elastic locking pieces, and the minimum inner diameter of the tapered cavity is greater than the diameter of the fixed rod.

[0012] Preferably, the inner side of the elastic locking piece is provided with an anti-skid pad with anti-skid lines on the inner side.

[0013] Preferably, the movable rod is provided with a scale line.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1、The utility model discloses a telescopic rectangular frame structure fixing frame and four clamping pieces, so that the device can be tightly fixed on the sidewall of the casing of different diameters, thereby ensuring the stability and centering accuracy of the whole device, the distance between the positioning rod and the center of the casing can be adjusted by accurately adjusting the length of the telescopic piece, so that it can be applied to drill bits of different diameters and ensure that the drill bit coincides with the center line of the drill hole during drilling, effectively preventing the drill bit from deviating, thereby improving the perpendicularity and accuracy of the drilling operation, enhancing the construction quality and efficiency of the cast-in-place pile, and the device can flexibly adapt to the casing and drilling requirements of different diameters, having strong versatility and practicality.

[0016] 2, the utility model discloses a first clamping plate and second clamping plate and the cooperation of adjusting screw rod can make clamping firmly clamped on the lateral wall of casing, and further ensure the stability of whole anti -deviation device, the setting of flexible rubber pad can increase the friction between clamping plate and casing, and reduce the damage to casing surface in the clamping process, in the drilling process, clamping can be firmly fixed on casing, and stable support is provided for positioning rod, thereby ensuring the drilling precision of drill bit,

[0017] 3, the utility model discloses the arc plate is set up in the inner end of positioning rod, and the inner side of arc plate is rolled and is provided with ball, so that the device can better guide drill bit along the predetermined trajectory and drill, ensure the perpendicularity and precision of drilling, the setting of ball can reduce the friction of drill bit and positioning rod in the drilling process, thereby reducing the wear of positioning rod and drill bit,

[0018] 4, the utility model discloses the sliding connection of outer sleeve and movable rod and the cooperation of locking piece make telescopic part can be firmly locked after adjusting to the length required, prevent loosening due to vibration or external force in the drilling process, realize the accurate control of the distance of positioning rod and casing center, through the scale line set up on movable rod, the length of telescopic part is read and adjusted quickly and accurately for construction personnel, further improve construction quality and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0020] Figure 1 It is a kind of rotary drilling head anti-deviation device structure schematic diagram;

[0021] Figure 2 It is a kind of rotary drilling head anti-deviation device clamping piece structure schematic diagram;

[0022] Figure 3 It is a kind of rotary drilling head anti-deviation device telescopic piece structure schematic diagram;

[0023] Figure 4 It is a kind of rotary drilling head anti-deviation device locking piece structure schematic diagram;

[0024] Mark No. : 1 - guard tube, 2 - fixing frame, 3 - clamping piece, 4 - sliding sleeve, 5 - positioning rod, 6 - telescopic piece, 7 - locking piece, 8 - arc plate, 9 - ball, 10 - mounting box, 11 - first clamping plate, 12 - connecting plate, 13 - second clamping plate, 14 - adjusting threaded rod, 15 - flexible rubber pad, 16 - telescopic rod, 17 - outer sleeve, 18 - movable rod, 19 - locking head, 20 - elastic locking piece, 21 - locking sleeve, 22 - non-slip pad, 23 - scale line. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0027] In the description of the present application, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as a limitation on the present application.

[0028] In addition, if the terms "first", "second", "third", and the like appear, they are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0029] In addition, if the terms "horizontal", "vertical", "overhanging", and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the utility model, still need to explain, unless another explicit provision and limitation, if appear term " set ", " install ", " link ", " connect " etc. should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two elements inside the intercommunication. For ordinary skilled in the art, can understand the specific meaning of the above-mentioned terms in the utility model according to specific circumstances.

[0031] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0032] As Figures 1-4 shown, a rotary drilling head deviation prevention device, including setting in the ground and the top end of the casing 1 that protrudes from the ground, rectangular frame structure and four edges telescopic fixing frame 2, four clamping pieces 3 are respectively arranged in the four corners of the fixing frame 2, can be clamped on the side wall of casing 1, the sliding sleeve 4 of fixed connection on the upper end of the clamping piece 3, the positioning rod 5 of sliding through the sliding sleeve 4, two mutually parallel and length adjustable telescopic parts 6, and locking piece 7 for fixing the length of telescopic part 6 is arranged on telescopic part 6, the two ends of telescopic part 6 are respectively fixedly connected with the outer end of two positioning rods 5 located on the same side, and four positioning rods 5 are arranged along the diagonal direction of the fixing frame 2.

[0033] It should be noted that: the casing 1 is a commonly used steel casing in the prior art, preferably made of steel plate not less than 10mm, the inner diameter of the casing 1 should be greater than the diameter of the drill bit 150mm-200mm, the center of the casing 1 is the center of the pile position, and the top end of the casing 1 needs to protrude from the ground at least 1.5m;

[0034] Among them, the fixing frame 2 includes four telescopic rods 16 connected in sequence.

[0035] Before construction, the casing 1 is buried in the ground with the top end above the ground, then the fixed frame 2 which is a rectangular frame and whose four sides are telescopic is adjusted to fit the size of the casing 1, the device is tightly clamped on the side wall of the casing 1 by using the four clamping pieces 3 at the four corners of the fixed frame 2, thereby ensuring the stability and centering accuracy of the whole device, the four positioning rods 5 are arranged along the diagonal direction of the fixed frame 2, the sliding sleeve 4 is also arranged along the diagonal direction of the fixed frame 2, adjusting the length of the telescopic piece 6 can make the positioning rod 5 move in the sliding sleeve 4 towards the center of the casing 1, thereby changing the distance between the inner end of the positioning rod 5 and the center of the casing 1, adjusting the length of the two telescopic pieces 6 according to the diameter of the drill bit, when the telescopic piece 6 reaches the set length, the length of the telescopic piece 6 is fixed by the locking piece 7, in order to keep the distance between the four positioning rods 5 and the center of the casing 1 consistent, the length of the two telescopic pieces 6 should be the same after adjustment, when the rotary drilling rig is drilling, the four positioning rods 5 can accurately constrain and guide the drill bit from multiple directions, ensuring that the drill bit always coincides with the center line of the drilling hole during drilling, ensuring that the drill bit coincides with the center line of the drilling hole during drilling, effectively preventing the drill bit from deviating, thereby improving the perpendicularity and accuracy of the drilling operation, and enhancing the construction quality and efficiency of the cast-in-place pile.

[0036] As shown in Figure 1 in order to better guide the drill bit to drill along the predetermined trajectory, further ensure the perpendicularity and accuracy of the drilling, the inner end of the positioning rod 5 is connected with an arc-shaped plate 8, a plurality of rolling balls 9 are arranged on the inner side of the arc-shaped plate, the arrangement of the rolling balls 9 can reduce the friction between the drill bit and the positioning rod 5 during drilling, thereby reducing the wear of the positioning rod 5 and the drill bit.

[0037] As shown in Figure 2 the clamping piece 3 comprises: an installation box 10 which is hollow inside and open at the front end, a first clamping plate 11 located at the open front end of the installation box 10, a connecting plate 12 connected at one end with the top end of the first clamping plate 11 and at the other end with the installation box 10, a second clamping plate 13 which is slidingly connected at the top end to the inner side wall on the top of the installation box 10, and an adjusting screw rod 14 which is rotatably connected at one end with the second clamping plate 13 and at the other end is threaded through the rear side wall of the installation box 10.

[0038] When the clamping piece 3 is installed, first, the first clamping plate 11 is attached to the inner side wall of the casing 1, the bottom surface of the connecting plate 12 is attached to the top of the casing 1, then the adjusting screw rod 14 is rotated, the second clamping plate 13 is brought closer to the first clamping plate 11 by the threaded propulsion, until the two tightly clamp the side wall of the casing 1, during drilling, the clamping piece 3 can be firmly fixed on the casing 1, providing stable support for the positioning rod 5, thereby ensuring the drilling accuracy of the drill bit;

[0039] In order to increase the friction between the clamping plate and the casing 1, and reduce the damage to the surface of the casing 1 during clamping, the second clamping plate 13 and the first clamping plate 11 are respectively provided with flexible rubber pads 15 on the opposite sides.

[0040] As shown in Figure 3 and Figure 4 The telescopic part 6 comprises an inner hollow outer sleeve 17 and a movable rod 18 slidingly connected in the outer sleeve 17, and the locking part 7 is arranged at the end of the outer sleeve 17 close to one end of the movable rod 18, the locking part 7 comprises a locking head 19 fixedly connected to the end of the outer sleeve 17, a plurality of elastic locking pieces 20 uniformly arranged at the end of the locking head 19, and a locking sleeve 21 threadedly connected to the outer side of the locking head 19, and the inner end of the locking sleeve 21 is provided with a tapered cavity that gathers the end of the plurality of elastic locking pieces 20, and the minimum inner diameter of the tapered cavity is greater than the diameter of the fixed rod.

[0041] When adjusting the length of the telescopic part 6, first rotate the loosening locking sleeve 21, so that the elastic locking pieces 20 expand outward under the constraint of the tapered cavity, and no longer tightly adhere to the outer side of the movable rod 18, then slide the movable rod 18 outward or inward as needed, and when adjusted to the required length, rotate the locking sleeve 21 to move it towards the locking head 19, the tapered cavity gradually gathers and presses the end of the elastic locking piece 20, so that it tightly adheres to the outer side of the movable rod 18, achieving locking of the length of the telescopic part 6, which can effectively prevent loosening due to vibration or external force during drilling.

[0042] In order to increase the friction between the elastic locking piece 20 and the movable rod 18, and further improve the locking force of the locking part 7, the inner side of the elastic locking piece 20 is provided with an anti-skid pad 22 with anti-skid lines on the inner side.

[0043] In order to facilitate the construction personnel to quickly and accurately read and adjust the length of the telescopic part 6, and further improve the construction quality and efficiency, the movable rod 18 is provided with a scale line 23.

[0044] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described by referring to the preferred embodiments of the present application, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present application defined in the appended claims.

Claims

1. A device for preventing deviation of a rotary excavating tool, characterized by: The utility model provides a kind of fixing frame for protecting cylinder, including the protecting cylinder (1) being arranged in ground and the top end being higher than ground, rectangular frame structure and four sides telescopic fixed frame (2), four clamping pieces (3) being respectively arranged in the four corners of the fixed frame (2), can be clamped on the side wall of protecting cylinder (1), sliding sleeve (4) being fixedly connected on the upper end of the clamping piece (3), positioning rod (5) slidingly penetrating the sliding sleeve (4), two mutually parallel and length adjustable telescopic members (6), and locking member (7) being arranged on telescopic member (6) for fixing the length of telescopic member (6), two ends of telescopic member (6) are fixedly connected with the outer end of two positioning rods (5) located on the same side, and four positioning rods (5) are arranged along the diagonal direction of the fixed frame (2).

2. The anti- deviation device for a rotary drill bit according to claim 1, wherein: The inner end of the positioning rod (5) is connected with an arc plate (8), and the inner side of the arc plate is provided with a plurality of rolling balls (9).

3. The anti- deviation device for a rotary drill bit of claim 1, wherein: The clamping piece (3) includes: an installation box (10) with an inner cavity and an open front end, a first clamping plate (11) located at the open front end of the installation box (10), a connecting plate (12) with one end connected to the top end of the first clamping plate (11) and the other end connected to the installation box (10), a second clamping plate (13) slidingly connected to the top inner side wall of the installation box (10), and an adjusting screw rod (14) with one end rotationally connected to the second clamping plate (13) and the other end threaded through the rear side wall of the installation box (10).

4. The anti- deflection device for a rotary drill bit of claim 3, wherein: The second clamping plate (13) and the first clamping plate (11) are respectively provided with flexible rubber pads (15) on the opposite sides.

5. The anti- deflection device for a drag bit of claim 1, wherein: The fixed frame (2) includes four telescopic rods (16) connected in sequence.

6. The anti- deflection device for a drag bit of claim 1, wherein: The telescopic member (6) includes: an outer sleeve (17) with an inner cavity, and a movable rod (18) slidingly connected in the outer sleeve (17), the locking member (7) is arranged at one end of the outer sleeve (17) close to the movable rod (18), the locking member (7) includes: a locking head (19) fixedly connected to the end of the outer sleeve (17), a plurality of elastic locking pieces (20) uniformly arranged at the end of the locking head (19), and a locking sleeve (21) threadedly connected to the outer side of the locking head (19), the locking sleeve (21) has a tapered cavity at one end inside to gather the ends of the plurality of elastic locking pieces (20), and the minimum inner diameter of the tapered cavity is greater than the diameter of the fixed rod.

7. The device of claim 6, wherein: The inner side of the elastic locking piece (20) is provided with an anti-skid pad (22) with anti-skid lines on the inner side.

8. The device of claim 6, wherein: The movable rod (18) is provided with a scale line (23).

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