A kind of equipment for preventing deviation of karst geology pile foundation drilling

Abstract

The present application belongs to the field of pile foundation impact drilling, and particularly relates to a rock-soluble-geology pile foundation anti-deviation drilling equipment, which comprises an impact drilling mechanism and a swing limiting mechanism, wherein the impact drilling mechanism is hung on a steel wire rope A of an impact drilling machine, and the impact drilling mechanism reciprocally impacts and breaks the rock stratum under the reciprocating traction of the steel wire rope A, and then forms an impact drilling hole on the rock stratum; the whole impact drilling process does not need to put a large amount of stone chips into the karst cave, thereby avoiding a large loss of mud used for protecting the hole wall and discharging slag in the drilling hole due to insufficient preparation amount of the stone chips, and simultaneously avoiding the impact drilling hole at the bottom of the karst cave from being deviated due to unreasonable stone chip putting position caused by insufficient stone chip putting experience, and effectively improving the impact drilling efficiency of the rock-soluble-geology.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of pile foundation impact drilling, and particularly relates to a pile foundation impact drilling equipment for preventing deviation in karst geology. BACKGROUND

[0002] In the process of pile foundation construction, an impact drill is usually used to impact the ground to form an impact hole with a certain depth. The impact drill has good drilling performance and can effectively drill hard strata with very high efficiency. It is suitable for hard strata, weathered strata and various hard and brittle geological environments.

[0003] The impact drill is an engineering drilling equipment that relies on impact force to drill holes through vertical reciprocating motion. Its working principle is similar to that of a hammer for rock drilling, which also relies on impact force to drill holes. Generally, it mainly refers to gravity impact drilling. The impact drill uses the kinetic energy generated by the impactor under the action of gravity to break rocks, and then uses mud to remove rock debris to achieve the drilling effect.

[0004] In the process of using the impact drill for karst geology pile foundation construction, the distribution of underground caves at the drilling site is detected before drilling. The position of the drill bit is also detected in real time during drilling. If the drill bit encounters a cave, the continued impact drilling of the impact drill will inevitably cause the drill bit to swing due to the slope at the bottom of the cave, resulting in deviation of the drill hole formed by the impact at the bottom of the cave.

[0005] The traditional treatment method is to fill the cave with a large amount of stone chips, and then use the impact drill to perform small-amplitude reciprocating impact until a non-deviated impact hole position is formed at the bottom of the cave. However, the treatment method of adding stone chips to the cave has the following problems:

[0006] Firstly, when the amount of stone chips is insufficient, the mud used to protect the hole wall and remove the slurry in the hole will be lost in large quantities due to the leakage of the cave.

[0007] Secondly, when the stone chip placement position is unreasonable, it cannot play its corresponding role, and ultimately still causes the drill hole at the bottom of the cave to deviate.

[0008] Finally, the direct consequence of placing stone chips is to greatly prolong the drilling construction time and reduce the work efficiency.

[0009] Therefore, it is necessary to design an impact drill that can impact a non-deviated drill hole at the bottom of the cave without placing stone chips to improve the drilling efficiency.

[0010] The present application designs a pile foundation impact drilling equipment for preventing deviation in karst geology to solve the above problems. SUMMARY

[0011] To solve the above-mentioned defects in the prior art, the application discloses a rock karst geology pile foundation deviation prevention drilling equipment.

[0012] It should be noted that in the description of the present application, the terms "inner", "outer", "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0013] The rock karst geology pile foundation deviation prevention drilling equipment comprises an impact drilling mechanism and a swing limiting mechanism, wherein the impact drilling mechanism is hung on a steel wire rope A of an impact drilling machine, the impact drilling mechanism is reciprocally pulled by the steel wire rope A to reciprocally impact and break the rock stratum, and then an impact drilling hole is formed on the rock stratum; when the impact drilling mechanism encounters and reaches a steep slope at the bottom of a karst cave, the impact drilling mechanism is reciprocally pulled by the steel wire rope A, a collision block self-provided by the impact drilling mechanism collides with the impact drilling mechanism during the swing of the impact drilling mechanism from an inclined state to a vertical state around the contact point of the impact drilling mechanism with the slope at the bottom of the karst cave, the impact drilling mechanism impacts the contact point of the impact drilling mechanism with the slope at the bottom of the karst cave under the reciprocally colliding action of the collision block, and finally a platform allowing the impact drilling mechanism to perform straight-up and straight-down impact drilling operation is formed on the slope at the bottom of the karst cave.

[0014] The impact drilling mechanism is matched with the swing limiting mechanism cooperating with the wall of the drilling hole, and the swing limiting mechanism cooperating with the impact drilling mechanism prevents the impact drilling mechanism reaching the gentle slope at the bottom of the karst cave from swinging and assists the impact drilling mechanism in performing vertical impact drilling on the gentle slope at the bottom of the karst cave.

[0015] The impact drill mechanism comprises an impact cone, a rotating sleeve, a slide rod, a spring A, a circular plate, a trigger lever, a swing lever, an arc-shaped slide sleeve and a striking block. The top end of the five-claw impact cone has a cylindrical platform, and the top end of the cylindrical platform is hinged with a swing lever connected with a steel wire rope A, and the swing lever cooperates with a swing limiting mechanism. A slide rod vertically slides in the middle of the impact cone, and a spring A is nested on the slide rod to reset it. The circular plate installed at the top end of the slide rod is in contact with the trigger lever installed at the end of the swing lever. The rotating sleeve and the striking block slide along the central axis of the arc-shaped slide sleeve and collide with each other. The rotating sleeve is nested and rotated on the cylindrical platform. The rotating sleeve and the arc-shaped slide sleeve have a structure for locking the rotating sleeve at the middle position of the arc-shaped slide sleeve and at the extreme position of the arc-shaped slide sleeve, and the structure is driven by the slide rod. When the cylindrical platform swings from the vertical state, the structure unlocks the rotating sleeve at the middle position of the arc-shaped slide sleeve, and when the cylindrical platform swings from the inclined state to the vertical state, the structure locks the rotating sleeve at the extreme position of the arc-shaped slide sleeve. The arc-shaped slide sleeve has a structure for locking the striking block farthest from the rotating sleeve in the arc-shaped slide sleeve. When the cylindrical platform swings from the vertical state, the structure locks the striking block farthest from the rotating sleeve, and when the cylindrical platform swings from the inclined state to the vertical state, the structure unlocks the striking block farthest from the rotating sleeve.

[0016] As a further improvement of the present technology, the slide rod slides in the sliding groove A in the cylindrical table, and the circular plate moves in the circular groove A on the top of the sliding groove A; two guide blocks A are symmetrically installed on the slide rod and slide in two guide grooves A on the inner wall of the sliding groove A. The cooperation between the guide blocks A and the guide grooves A plays a positioning and guiding role in the vertical sliding of the slide rod in the sliding groove A. The spring A is located in the ring groove A on the inner wall of the sliding groove A; one end of the spring A is connected with the inner wall of the ring groove A, and the other end is connected with the tension spring ring A installed on the slide rod; the circular ring A is nested and installed on the cylindrical table, and rotates in the ring groove C on the inner wall of the rotating sleeve; the sliding block vertically slides in the sliding groove A, and the rack B installed on the upper end of the sliding block is engaged with the spur gear B installed in the sliding groove A; the spur gear B is connected with the coaxial spur gear A through the shaft sleeve, and the spur gear A is engaged with the rack A installed on the lower end of the slide rod; the ring groove B is provided on the outer side of the cylindrical table, and the ring sleeve A is rotationally fitted in the ring groove B; the ring sleeve A is fixedly connected with the sliding block through the four connecting blocks uniformly distributed in the circumference, and the four connecting blocks vertically slide in the four sliding grooves B on the inner wall of the sliding groove A and communicated with the ring groove B; two guide blocks B are symmetrically installed on the rotating sleeve and slide in two guide grooves B on the inner wall of the arc-shaped ring sleeve. The cooperation between the guide blocks B and the guide grooves B plays a positioning and guiding role in the sliding of the ring sleeve around the central axis of the arc-shaped sliding sleeve in the arc-shaped sliding sleeve. Two sliding grooves C are symmetrically provided on the inner wall of the rotating sleeve and communicated with the outer side, and an outer sleeve that cooperates with the ring groove E on the ring sleeve A slides in each sliding groove C, and the inner wall of the ring groove E has a transition inclined surface for the sliding of the outer sleeve out of the ring groove E along the central axis of the cylindrical table; a spring B is nested on each outer sleeve for resetting; a limiting block A that cooperates with the limiting groove A and the limiting groove B on the corresponding side inner wall of the arc-shaped sliding sleeve slides in each outer sleeve; a spring C is installed in each outer sleeve for resetting the corresponding limiting block A; two guide blocks E are symmetrically installed on the impact block and slide in two guide grooves B on the inner wall of the arc-shaped sliding sleeve. The cooperation between the guide blocks E and the guide grooves B plays a positioning and guiding role in the sliding of the impact block around the central axis of the arc-shaped sliding sleeve in the arc-shaped sliding sleeve. Two limiting blocks B that slide in the two sliding grooves D symmetrically distributed near the end of the inner wall of the arc-shaped sliding sleeve cooperate with the impact block; a trigger block A that cooperates with the corresponding side limiting block A slides in each limiting groove A, and a trigger block B that cooperates with the corresponding side limiting block A slides in each limiting groove B; the trigger blocks A and B and the limiting blocks B on the same side are installed on the same connecting rod, and the connecting rod slides in the sliding groove E communicated with the limiting groove A, the limiting groove B and the sliding groove D on the same side in the arc-shaped sliding sleeve; two springs D that reset the corresponding connecting rods are symmetrically installed in the sliding groove E; one end of the spring D is connected with the connecting rod, and the other end is connected with the inner wall of the sliding groove E.

[0017] As a further improvement of the present technology, the spring B is located in the ring groove D on the inner wall of the corresponding sliding groove C; one end of the spring B is connected with the inner wall of the corresponding ring groove D, and the other end is connected with the tension spring ring B installed on the corresponding sleeve; two guide blocks C are symmetrically installed on the limiting block A, and the two guide blocks C are respectively slid in the two guide grooves C on the inner wall of the corresponding sleeve. The cooperation of the guide block C and the guide groove C plays a positioning and guiding role for the sliding of the limiting block A in the corresponding sleeve, while ensuring that the spring C is always in a compressed energy storage state. One end of the spring C is connected with the inner wall of the corresponding sleeve, and the other end is connected with the end face of the corresponding limiting block A.

[0018] As a further improvement of the present technology, the impact cone bottom is uniformly covered with impact teeth; the limiting groove A is located in the middle of the inner wall of the corresponding side of the arc-shaped sliding sleeve, and the limiting groove B and the sliding groove D are respectively located near the two ends of the inner wall of the corresponding side of the arc-shaped sliding sleeve; the arc of the limiting groove B along the direction of the sliding of the rotating sleeve relative to the arc-shaped sliding sleeve is greater than the arc of the limiting groove A.

[0019] As a further improvement of the present technology, the swing limiting mechanism includes a ring sleeve B, a shaft A, a bevel gear A, a bevel gear B, a ring sleeve C, an internal thread sleeve, an arc plate, a ring sleeve D, a winding wheel, and a steel wire rope B, wherein a plurality of circular grooves B are uniformly formed on the side wall of the ring sleeve B, and a radial shaft A is rotatably arranged in each circular groove B; a bevel gear A is installed on each shaft A, and the two adjacent bevel gears A are engaged with the bevel gear B installed on the inner wall of the ring sleeve B; an internal thread sleeve is threadedly connected with each shaft A, and the internal thread sleeve is slidably arranged in the ring sleeve C installed at the corresponding circular groove B; an arc plate is installed at the end of the internal thread sleeve and cooperates with the inner wall of the drill hole; a winding wheel is installed on one shaft A and arranged in the accommodating groove on the inner wall of the corresponding circular groove B; a plurality of turns of steel wire rope B are wound on the winding wheel, and the two ends of the steel wire rope B are connected with a motor module installed on the impact drilling machine, and the motor module drives the winding wheel to rotate through the steel wire rope B; a ring sleeve D with the same center axis is installed in the ring sleeve B through a plurality of fixing rods uniformly distributed around the ring sleeve B; the ring sleeve D cooperates with the swing rod in the impact drilling mechanism.

[0020] As a further improvement of the present technology, two guide blocks D are symmetrically installed on the internal thread sleeve, and the two guide blocks D are respectively slid in the two guide grooves D on the inner wall of the ring sleeve C. The cooperation of the guide block D and the guide groove D plays a positioning and guiding role for the axial sliding of the internal thread sleeve in the corresponding ring sleeve C. A protective cover is installed on the inner wall of the ring sleeve B to isolate the bevel gear A and the bevel gear B from the mud.

[0021] Compared with a traditional pile foundation impact drill, the impact drill mechanism is reciprocally pulled by the steel wire rope A to impact drill rock strata, when the impact drill mechanism encounters a karst cave and reaches the steep slope at the bottom of the karst cave, the impact drill mechanism is swung around the contact point between the impact drill mechanism and the slope at the bottom of the karst cave by small-amplitude reciprocally pulling the impact drill mechanism by the steel wire rope A, so that the impact block in the impact drill mechanism violently impacts the impact cone during the swinging of the impact drill mechanism from the inclined state to the vertical state, the impact cone impacts the contact point between the impact cone and the slope at the bottom of the karst cave horizontally and finally forms a platform which is convenient for the impact drill mechanism to vertically impact drill the bottom of the karst cave, and the impact drill mechanism continues to vertically impact drill on the platform. The whole impact drilling process does not need to put a large amount of stone into the karst cave, so that the large amount of mud used to protect the hole wall and discharge slag in the drilling is prevented from being lost due to the insufficient amount of stone, and the impact drilling at the bottom of the karst cave is prevented from being deviated due to the unreasonable position of the stone caused by the insufficient experience of putting the stone, so that the impact drilling efficiency of the karst geology is effectively improved. In addition, when the impact drill mechanism encounters a gentle slope at the bottom of the karst cave, the swing limiting mechanism cooperating with the impact drill mechanism limits the swinging of the impact cone around the contact point between the impact cone and the slope at the bottom of the karst cave, so that the impact drill mechanism reciprocally impacts the gentle slope at the bottom of the karst cave vertically under the action of gravity and finally forms a vertical drilling hole on the gentle slope at the bottom of the karst cave, so that the impact of the impact drill mechanism by the impact block is effectively reduced, the equipment loss is reduced, and the service life of the equipment is prolonged. The present application has the advantages of simple structure and good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a profile view of the impact drill mechanism and the swing limiting mechanism cooperating with the drilling hole and the slope at the bottom of the karst cave.

[0023] Figure 2 is a profile view of the swing limiting mechanism cooperating with the drilling hole.

[0024] Figure 3 is a profile view of the impact drill mechanism.

[0025] Figure 4 is a profile view of the cylindrical table, the sliding block, the connecting block, the ring sleeve A, the outer sleeve, the limiting block A, the trigger block A, the connecting rod, the arc-shaped sliding sleeve and the rotating sleeve.

[0026] Figure 5 is a profile view of the arc-shaped sliding sleeve, the connecting rod, the trigger block A, the trigger block, the limiting block A, the rotating sleeve, the impact block and the limiting block B.

[0027] Figure 6 is a profile view of the impact cone.

[0028] Figure 7 is a profile view of the impact cone.

[0029] Figure 8 is the profile view of the arc-shaped sliding sleeve and its two perspectives.

[0030] Figure 9 is the profile view of the rotating sleeve.

[0031] Figure 10 is the profile view of the ring sleeve A.

[0032] Figure 11 is the profile view of the sliding rod, rack A, spur gear A, shaft sleeve, spur gear B, rack B, and sliding block.

[0033] Figure 12 is the profile view of the swing limiting mechanism.

[0034] Figure 13 is the profile view of the swing limiting mechanism.

[0035] Figure 14 is the profile view of the swing limiting mechanism.

[0036] Figure 15 is the profile view of the ring sleeve B.

[0037] Figure Label Name: 1, drill hole; 2, karst cave; 3, slope; 4, impact drilling mechanism; 5, impact cone; 6, impact teeth; 7, cylindrical table; 8, circular groove A; 9, sliding groove A; 10, ring groove A; 11, guide groove A; 12, ring groove B; 13, sliding groove B; 14, rotating sleeve; 15, ring groove C; 16, sliding groove C; 17, ring groove D; 18, circular ring A; 19, sliding rod; 20, guide block A; 21, spring A; 22, tension spring ring A; 23, circular plate; 24, trigger lever; 25, swing lever; 26, rack A; 27, spur gear A; 28, shaft sleeve; 29, spur gear B; 30, rack B; 31, sliding block; 32, connecting block; 33, ring sleeve A; 34, ring groove E; 35, transition slope; 36, outer sleeve; 37, guide groove C; 38, spring B; 39, tension spring ring B; 40, limit block A; 41, guide block C; 42, spring C; 43, guide block B; 44, arc-shaped sliding sleeve; 45, guide groove B; 46, limit groove A; 47, limit groove B; 48, sliding groove D; 49, sliding groove E; 50, connecting rod; 51, spring D; 52, trigger block A; 53, trigger block B; 54, limit block B; 55, impact block; 56, guide block E; 57, steel wire rope A; 58, swing limiting mechanism; 59, ring sleeve B; 60, circular groove B; 61, accommodating groove; 62, shaft A; 63, bevel gear A; 64, bevel gear B; 65, ring sleeve C; 66, guide groove D; 67, internal threaded sleeve; 68, guide block D; 69, arc plate; 70, ring sleeve D; 71, fixed rod; 72, winding wheel; 73, steel wire rope B; 74, protective cover. Detailed Implementation

[0038] The accompanying drawings are schematic diagrams illustrating embodiments of the present invention to facilitate understanding of the structural operating principle. Specific product structures and dimensions can be determined based on the usage environment and conventional technologies.

[0039] like Figure 1 , 2 As shown, it includes an impact drilling mechanism 4 and a swing limiting mechanism 58, wherein, as... Figure 1 As shown, the impact drilling mechanism 4 is suspended on the steel wire rope A57 of the impact drilling machine. Under the reciprocating traction of the steel wire rope A57, the impact drilling mechanism 4 reciprocates to impact and break the rock strata, thereby forming an impact drill hole 1 in the rock strata; as shown Figure 1 , 2 As shown in Figure 3, when the impact drilling mechanism 4 encounters and reaches the steep slope 3 at the bottom of the cave 2, the impact drilling mechanism 4 is pulled back and forth by the steel wire rope A57. The impact block 55 on the impact drilling mechanism 4 impacts the impact drilling mechanism 4 as it swings back from the inclined state to the vertical state around the contact point with the bottom slope 3 of the cave 2. Under the reciprocating impact of the impact block 55, the impact drilling mechanism 4 impacts the contact point with the bottom slope 3 of the cave 2 and finally forms a platform on the bottom slope 3 of the cave 2 that allows the impact drilling mechanism 4 to perform vertical impact drilling 1.

[0040] like Figure 1 , 2 As shown, the impact drilling mechanism 4 is equipped with a swing limiting mechanism 58 that cooperates with the borehole wall 1. The swing limiting mechanism 58, which cooperates with the impact drilling mechanism 4, prevents the impact drilling mechanism 4 from swinging when it reaches the gentle slope 3 at the bottom of the cave 2, and assists the impact drilling mechanism 4 in making vertical impact drilling 1 on the gentle slope 3 at the bottom of the cave 2.

[0041] like Figure 3 , 4 As shown, the aforementioned impact drill mechanism 4 includes an impact cone 5, a rotating sleeve 14, a sliding rod 19, a spring A21, a circular plate 23, a trigger rod 24, a swing rod 25, an arc-shaped sliding sleeve 44, and an impact block 55, wherein... Figure 2 , 3 As shown in Figure 7, the top of the five-claw-shaped impact cone 5 has a cylindrical platform 7, and the top of the cylindrical platform 7 is ball-jointed with a swing rod 25 connected to the steel wire rope A57. The swing rod 25 cooperates with the swing limiting mechanism 58; as shown in Figure 7. Figure 3 , 4 As shown, a sliding rod 19 slides vertically in the middle of the impact cone 5, and a spring A21 for its reset is nested on the sliding rod 19; a circular plate 23 installed at the top of the sliding rod 19 contacts and engages with a trigger rod 24 installed at the end of the swing rod 25; a rotating sleeve 14 and an impact block 55 slide around its central axis inside the arc-shaped sliding sleeve 44 and engage with each other, the rotating sleeve 14 is nested and rotates on the cylindrical platform 7; as Figure 4、 5 , 6, the rotating sleeve 14 and the arc-shaped sleeve 44 have a structure for locking the rotating sleeve 14 at the middle position in the arc-shaped sleeve 44 and at the extreme position at one end in the arc-shaped sleeve 44 and driven by the sliding rod 19, which unlocks the position of the rotating sleeve 14 at the middle in the arc-shaped sleeve 44 when the columnar table 7 swings from the inclined state to the vertical state and locks the extreme position of the rotating sleeve 14 at one end in the arc-shaped sleeve 44 when the columnar table 7 swings from the vertical state; the arc-shaped sleeve 44 has a structure for locking the impact block 55 farthest from the rotating sleeve 14 in the arc-shaped sleeve 44, which locks the position of the impact block 55 farthest from the rotating sleeve 14 when the columnar table 7 swings from the vertical state and unlocks the position of the impact block 55 farthest from the rotating sleeve 14 when the columnar table 7 swings from the inclined state to the vertical state.

[0042] As shown in Figure 3 , 4 , 7, the sliding rod 19 slides in the sliding groove A9 in the columnar table 7, and the circular plate 23 moves in the circular groove A8 on the top of the sliding groove A9; the sliding rod 19 is symmetrically provided with two guide blocks A20, which respectively slide in two guide grooves A11 on the inner wall of the sliding groove A9. The cooperation of the guide blocks A20 and the guide grooves A11 plays a positioning and guiding role in the vertical sliding of the sliding rod 19 in the sliding groove A9. The spring A21 is located in the ring groove A10 on the inner wall of the sliding groove A9; one end of the spring A21 is connected with the inner wall of the ring groove A10, and the other end is connected with the tension spring ring A22 installed on the sliding rod 19; the circular ring A18 is nested on the columnar table 7 and rotates in the ring groove C15 on the inner wall of the rotating sleeve 14; as shown in Figure 3 , 4 , 11, the sliding block 31 vertically slides in the sliding groove A9, the rack B30 installed on the upper end of the sliding block 31 is engaged with the spur gear B29 installed in the sliding groove A9, the spur gear B29 is connected with the coaxial spur gear A27 through the shaft sleeve 28, and the spur gear A27 is engaged with the rack A26 installed on the lower end of the sliding rod 19; as shown in Figure 4 , 7 , 10, the ring groove B12 is formed on the outer side of the columnar table 7, and the ring sleeve A33 is rotationally matched in the ring groove B12; the ring sleeve A33 is fixedly connected with the sliding block 31 through the four connecting blocks 32 uniformly distributed in the circumferential direction, and the four connecting blocks 32 respectively vertically slide in the four sliding grooves B13 on the inner wall of the sliding groove A9 and communicated with the ring groove B12; as shown in Figure 3 , 4 , 8, the rotating sleeve 14 is symmetrically provided with two guide blocks B43, which respectively slide in two guide grooves B45 on the inner wall of the arc-shaped ring sleeve. The cooperation of the guide blocks B43 and the guide grooves B45 plays a positioning and guiding role in the sliding of the ring sleeve around the central axis of the arc-shaped sleeve 44 in the arc-shaped sleeve 44. As shown in Figure 4 ,9 As shown in Figure 10, two symmetrical sliding grooves C16 are formed on the inner wall of the rotating sleeve 14, communicating with its outer side. Each sliding groove C16 contains a sliding outer sleeve 36 that mates with the annular groove E34 on the ring sleeve A33. The inner wall of the annular groove E34 has a transition slope 35 that facilitates the sliding of the outer sleeve 36 along the central axis of the cylindrical platform 7 out of the annular groove E34. Each outer sleeve 36 is fitted with a spring B38 for its reset. Each outer sleeve 36 contains a limiting block A40 that mates with the upper limit groove A46 and the limiting groove B47 on the corresponding side inner wall of the arc-shaped sliding sleeve 44. Each outer sleeve 36 contains a spring C42 for resetting the corresponding limiting block A40. Figure 3 , 6 As shown in Figure 8, two guide blocks E56 are symmetrically mounted on the impact block 55. The two guide blocks E56 slide within two guide grooves B45 on the inner wall of the arc-shaped sleeve 44. The cooperation between the guide blocks E56 and the guide grooves B45 provides positioning and guidance for the sliding of the impact block 55 within the arc-shaped sleeve 44 around its central axis. Figure 5 , 6 As shown in Figure 8, the impact block 55 cooperates with two limiting blocks B54 that slide in two symmetrically distributed grooves D48 near the end of the inner wall of the arc-shaped sliding sleeve 44; each limiting groove A46 has a trigger block A52 that cooperates with the corresponding side limiting block A40, and each limiting groove B47 has a trigger block B53 that cooperates with the corresponding side limiting block A40; the trigger blocks A52, B53 and limiting blocks B54 on the same side are installed on the same connecting rod 50, and the connecting rod 50 slides in the groove E49 inside the arc-shaped sliding sleeve 44 that communicates with the limiting grooves A46, B47 and D48 on the same side; two springs D51 that reset the corresponding connecting rod 50 are symmetrically installed in the groove E49; one end of the spring D51 is connected to the connecting rod 50 and the other end is connected to the inner wall of the groove E49.

[0043] like Figure 4 , 9 As shown, the spring B38 is located in the annular groove D17 on the inner wall of the corresponding slide groove C16; one end of the spring B38 is connected to the inner wall of the corresponding annular groove D17, and the other end is connected to the tension spring ring B39 installed on the corresponding outer sleeve 36; two guide blocks C41 are symmetrically installed on the limiting block A40, and the two guide blocks C41 slide in the two guide grooves C37 on the inner wall of the corresponding outer sleeve 36 respectively. The cooperation between the guide block C41 and the guide groove C37 plays a positioning and guiding role for the sliding of the limiting block A40 in the corresponding outer sleeve 36, while ensuring that the spring C42 is always in a compressed and energy-storing state. One end of the spring C42 is connected to the inner wall of the corresponding outer sleeve 36, and the other end is connected to the end face of the corresponding limiting block A40.

[0044] like Figure 7 As shown, the bottom of the aforementioned impact cone 5 is evenly and densely covered with impact teeth 6; as Figure 5 ,8 As shown, the limiting groove A46 is located in the middle of the inner wall of the arc-shaped sliding sleeve 44, and the limiting groove B47 and the sliding groove D48 are respectively located near the two ends of the inner wall of the arc-shaped sliding sleeve 44. The arc of the limiting groove B47 along the sliding direction of the rotating sleeve 14 relative to the arc-shaped sliding sleeve 44 is greater than the arc of the limiting groove A46.

[0045] As shown in Figure 12 , 13 , 14, the above-mentioned swing mechanism 58 includes a ring sleeve B59, a shaft A62, a bevel gear A63, a bevel gear B64, a ring sleeve C65, an internally threaded sleeve 67, an arc plate 69, a ring sleeve D70, a winding wheel 72, and a steel wire rope B73. As shown in Figure 13 , 14 , 15, a plurality of circular grooves B60 are uniformly arranged on the side wall of the ring sleeve B59, and a radial shaft A62 is respectively rotatably arranged in each circular groove B60. Each shaft A62 is provided with a bevel gear A63, and the adjacent two bevel gears A63 are engaged with the bevel gear B64 installed on the inner wall of the ring sleeve B59. Each shaft A62 is threadedly connected with an internally threaded sleeve 67, and the internally threaded sleeve 67 is radially slidably arranged in the ring sleeve C65 installed at the corresponding circular groove B60. As shown in Figure 2 , 14 , 15, the internally threaded sleeve 67 is provided with an arc plate 69 at the end thereof, which is matched with the inner wall of the drill hole 1. A winding wheel 72 is installed on one shaft A62, and the winding wheel 72 is arranged in the accommodating groove 61 on the inner wall of the corresponding circular groove B60. A plurality of turns of the steel wire rope B73 are wound on the winding wheel 72, and the two ends of the steel wire rope B73 are connected with a motor module installed on the percussion drilling machine. The motor module drives the winding wheel 72 to rotate through the steel wire rope B73. As shown in Figure 2 , 12 , 13, a plurality of fixed rods 71 are uniformly distributed around the ring sleeve B59, and a ring sleeve D70 with the same center axis is installed in the ring sleeve B59. The ring sleeve D70 is matched with the swing rod 25 in the percussion drilling mechanism 4.

[0046] As shown in Figure 14 , two guide blocks D68 are symmetrically installed on the internally threaded sleeve 67, and the two guide blocks D68 are respectively slidably arranged in the two guide grooves D66 on the inner wall of the ring sleeve C65. The cooperation between the guide blocks D68 and the guide grooves D66 plays a positioning and guiding role in the axial sliding of the internally threaded sleeve 67 in the corresponding ring sleeve C65. As shown in Figure 12 , 13 , 14, a protective cover 74 is installed on the inner wall of the ring sleeve B59 to isolate the bevel gear A63 and the bevel gear B64 from the mud.

[0047] The workflow of the present application: in the initial state, the impact drill mechanism 4 is hung in the air by the steel wire rope A57, the swing bar 25 and the impact cone 5 are both in the vertical state, the end of the trigger bar 24 abuts against the central part of the round plate 23. The two limiting blocks A40 are respectively inserted into the two limiting grooves A46 on the inner wall of the arc-shaped sliding sleeve 44 and abut against the corresponding trigger blocks A52, and the position of the rotating sleeve 14 in the middle of the arc-shaped sliding sleeve 44 is locked. The ends of the two outer sleeves 36 abut against the outer cylindrical surface of the ring sleeve A33, the springs A21, the springs B38, the springs C42 and the springs D51 are all in the compressed energy storage state, and the two limiting blocks B54 are all retracted in the corresponding sliding grooves D48. The impact block 55 is in close contact with the rotating sleeve 14, and the impact block 55 shields the two sliding grooves D48, and the two limiting blocks B54 abut against the side wall of the impact block 55 at the same time.

[0048] When the steel wire rope A57 drives the impact drill mechanism 4 to impact the rock layer vertically to drill the hole 1, in the process of interaction between the impact cone 5 and the rock layer, due to the relaxation of the steel wire rope A57, the swing bar 25 swings around the spherical hinge point under the action of gravity, and the swing bar 25 drives the trigger bar 24 to swing synchronously, and the end of the trigger bar 24 swings from the middle part of the round plate 23 to the edge direction, and the slide bar 19 drives the round plate 23 to move vertically upward under the action of the spring A21, and the round plate 23 always abuts against the trigger bar 24. The slide bar 19 drives the ring sleeve A33 to move axially vertically downward quickly relative to the cylindrical table 7 through the rack A26, the spur gear A27, the shaft sleeve 28, the spur gear B29, the rack B30, the sliding block 31 and the connecting block 32, and the ends of the two outer sleeves 36 move quickly to the ring groove E34 on the ring sleeve A33 and enter the ring groove E34 quickly under the action of the corresponding spring B38. The two outer sleeves 36 drive the corresponding limiting blocks A40 to disengage from the corresponding limiting grooves A46 and release the locking of the position of the rotating sleeve 14 in the middle of the arc-shaped sliding sleeve 44 through the corresponding two guide blocks C41, and the arc-shaped sliding sleeve 44 does not move relative to the rotating sleeve 14 under the action of gravity. At the same time, the two connecting rods 50 drive the trigger blocks A52, the trigger blocks B53 and the limiting blocks B54 mounted thereon to move under the action of the corresponding two springs D51, the two trigger blocks A52 are driven by the corresponding connecting rods 50 to further penetrate into the limiting grooves A46, the two trigger blocks B53 are driven by the corresponding connecting rods 50 to further penetrate into the limiting grooves B47, and the two limiting blocks B54 are driven by the corresponding connecting rods 50 to slide out of the corresponding sliding grooves D48. Since the impact block 55 shields the two sliding grooves D48, the two limiting blocks B54 abut against the impact block 55 and do not slide out of the sliding grooves D48, so that the two connecting rods 50 do not move, and the trigger blocks A52 and the trigger blocks B53 mounted on each connecting rod 50 also do not move.

[0049] With the steel wire rope A57 continues to tighten and pull the swing lever 25 vertically upward, the swing lever 25 instantaneously from the inclined state to the vertical state relative to the impact cone 5, the swing lever 25 drive the trigger lever 24 from the edge of the round plate 23 to the middle of the round plate 23, the trigger lever 24 through the round plate 23 drive the slide rod 19 relative to the cylindrical table 7 vertically downward sliding, the spring A21 is further compressed energy storage. The slide rod 19 through a series of transmission drive ring sleeve A33 relative to the cylindrical table 7 vertically upward fast movement, two outer sleeve 36 end through the ring groove E34 of the excessive slope fast out of the ring groove E34 and with the outer cylindrical surface of the ring sleeve A33. Two springs B38 are simultaneously further compressed energy storage, two outer sleeve 36 respectively through the corresponding spring C42 drive the corresponding limit block A40 fast inserted into the corresponding limit groove A46 and to the sleeve 14 in the arc slide sleeve 44 inside the middle position of the lock.

[0050] The impact drill mechanism 4 so reciprocating through the steel wire rope A57 traction and vertical direction to the rock stratum impact drilling 1, when the impact drill mechanism 4 and the underground cave 2 meet and reach the steep slope 3 at the bottom of the cave 2, stop the steel wire rope A57 to the impact cone 5 of the large amplitude traction, but through the steel wire rope A57 to the impact cone 5 of the small amplitude traction, ensure that the impact cone 5 in the premise of not leaving the steep slope 3 at the bottom of the cave 2 around its contact point with the slope 3 at the bottom of the cave 2 reciprocating swing.

[0051] When the steel wire rope A57 small amplitude down, the impact cone 5 swing around its contact point with the slope 3 at the bottom of the cave 2 under the action of gravity, the arc slide sleeve 44 in the torque generated by the impact block 55 around the cylindrical table 7 axis drive the rotating sleeve 14 relative to the cylindrical table 7, and finally impact block 55 located on the inclined cylindrical table 7 of the lower side. At the same time, the swing lever 25 swing relative to the impact cone 5 under the traction of the steel wire rope A57. The swing lever 25 drive the trigger lever 24 from the middle of the round plate 23 to the edge of the round plate 23, the slide rod 19 drive the round plate 23 to the top of the cylindrical table 7 direction axial movement under the action of the spring A21, the slide rod 19 through a series of transmission drive ring sleeve A33 to the bottom of the impact cone 5 direction axial fast movement. Under the action of the corresponding spring B38, the two outer sleeve 36 end respectively fast into the ring groove E34 on the ring sleeve A33, the two outer sleeve 36 respectively through the corresponding two guide block C41 drive the corresponding limit block A40 fast slide out of the corresponding limit groove A46 contraction into the corresponding slide groove C16 and remove the lock to the sleeve 14 in the arc slide sleeve 44 inside the middle position, the impact block 55 still to the two limit block B54 pressure. The arc slide sleeve 44 under the action of gravity relative to the rotating sleeve 14 to the lower side of the inclined rotating sleeve 14 direction sliding, while the impact block 55 under the action of gravity relative to the arc slide sleeve 44 to the end of the arc slide sleeve 44 inside the limit position direction fast sliding.

[0052] When the arc-shaped sliding sleeve 44 slides to the limit relative to the rotating sleeve 14, the rotating sleeve 14 and the impact block 55 are located at the two end limit positions within the arc-shaped sliding sleeve 44 respectively, the impact block 55 just passes over the two limit blocks B54 and releases the pressure on the two limit blocks B54, the two outer sleeves 36 on the rotating sleeve 14 are opposite to the limit grooves B47 on the same side wall within the arc-shaped sliding sleeve 44 respectively. The two connecting rods 50 drive the limit blocks B54 mounted thereon to slide out of the corresponding sliding grooves D48 instantaneously under the action of the corresponding two springs D51 and limit the back sliding of the impact block 55 within the arc-shaped sliding sleeve 44, the two trigger blocks A52 are driven by the corresponding connecting rods 50 to penetrate into the corresponding limit grooves A46 and do not limit the back sliding of the rotating sleeve 14 within the arc-shaped sliding sleeve 44, the two trigger blocks B53 are driven by the corresponding connecting rods 50 to penetrate into the corresponding limit grooves B47 and do not limit the back sliding of the rotating sleeve 14 within the arc-shaped sliding sleeve 44.

[0053] When the swing lever 25 swings from the inclined state to the vertical state under the traction of the steel wire rope A57, the swing lever 25 drives the trigger lever 24 to move from the edge position of the circular plate 23 to the middle position of the circular plate 23, the circular plate 23 drives the sliding lever 19 to reset within the cylindrical table 7 under the pressure of the trigger lever 24, and the spring A21 is further compressed to store energy. The sliding lever 19 drives the ring sleeve A33 to reset quickly relative to the cylindrical table 7 through a series of transmissions, and the two outer sleeves 36 are quickly resisted by the outer cylindrical surface of the ring sleeve A33 through the overhanging slope of the ring groove E34 on the ring sleeve A33, and the two springs B38 are further compressed to store energy. The two outer sleeves 36 drive the corresponding limit blocks A40 to insert into the corresponding limit grooves B47 and resist the corresponding trigger blocks B53 through the corresponding springs C42. At the same time, as the swing lever 25 swings in the vertical direction under the traction of the steel wire rope A57, the impact cone 5 also swings back in the vertical direction around its contact point with the slope 3 of the bottom of the cave 2, and the arc-shaped sliding sleeve 44 is about to reset relative to the rotating sleeve 14 under the action of the weight and the gravity of the impact block 55. Since the arc of the limit groove B47 around the central axis of the arc-shaped sliding sleeve 44 is greater than the arc of the limit groove A46 around the central axis of the arc-shaped sliding sleeve 44, during the resetting of the arc-shaped sliding sleeve 44 relative to the rotating sleeve 14, the two limit blocks A40 will not instantaneously dislocate with the corresponding limit grooves B47, and the two limit blocks A40 are still smoothly inserted into the limit grooves B47 while the arc-shaped sliding sleeve 44 and the rotating sleeve 14 slide relative to each other, and the rotating sleeve 14 is limited at one end limit position within the arc-shaped sliding sleeve 44, preventing the resetting of the arc-shaped sliding sleeve 44 relative to the rotating sleeve 14.

[0054] When the two limit blocks A40 are fully inserted into the corresponding limit grooves A46, the two limit blocks A40 are reset in the arc-shaped sliding sleeve 44 through the corresponding trigger blocks B53 and the corresponding connecting rods 50, and the two springs D51 are further compressed and stored. The two connecting rods 50 drive the corresponding trigger blocks A52 and limit blocks B54 to reset, the two trigger blocks A52 are retracted into the corresponding limit grooves A46, and the two limit blocks B54 are retracted into the corresponding sliding grooves D48 and are unlocked from the limit position of the impact block 55 in the arc-shaped sliding sleeve 44.

[0055] The impact block 55 slides along the arc-shaped sliding sleeve 44 under the action of gravity and finally collides violently with the rotating sleeve 14. The state of violent impact is brought by the cylindrical table 7 to drive the impact cone 5 to impact horizontally at the contact point of the impact cone 5 and the slope 3 of the bottom of the karst cave 2, and a pit is formed at the contact point of the impact cone 5 and the slope 3 of the bottom of the karst cave 2. With the steel wire rope A57 repeatedly pulling the impact drilling mechanism 4 around the contact point of the impact cone 5 and the slope 3 of the bottom of the karst cave 2, the impact block 55 repeatedly impacts the impact cone 5, and the impact cone 5 repeatedly impacts the contact point of the impact cone 5 and the slope 3 of the bottom of the karst cave 2, and finally forms a platform at the contact point of the impact cone 5 and the slope 3 of the bottom of the karst cave 2. After the platform is formed, the steel wire rope A57 is used to start large-scale reciprocating traction of the impact drilling mechanism 4, and the platform bottom is repeatedly impacted, and finally a vertical impact drilling hole 1 is formed on the slope 3 of the bottom of the karst cave 2. The whole process does not need to put a large number of stones, saves cost, prevents the loss of mud used to protect the hole wall and discharge residue in the drilling hole 1 due to lack of experience in stone throwing, and improves the efficiency of the impact drilling hole 1 in karst geology.

[0056] When the impact drilling mechanism 4 encounters the relatively gentle cave 2 of the bottom slope 3 during the impact drilling of the borehole 1, the impact drilling mechanism 4 is pulled out of the borehole 1 vertically through the steel wire rope A57, the swing limiting mechanism 58 is matched with the impact drilling mechanism 4, and the swing rod 25 is inserted into the ring sleeve D70 on the swing limiting mechanism 58 and is hoisted into the borehole 1 together with the impact drilling mechanism 4. When the impact cone 5 reaches the gentle slope 3 at the bottom of the cave 2 again, the swing limiting mechanism 58 is kept at a position above the cave 2. The electric module connected with the steel wire rope B73 on the impact drilling mechanism is started, the electric module drives the winding wheel 72 on the swing limiting mechanism 58 to rotate through the steel wire rope B73, the winding wheel 72 drives the corresponding shaft A62 to rotate, the shaft A62 on which the winding wheel 72 is installed drives a plurality of shafts A62 to rotate synchronously through the corresponding bevel gear A63 and the adjacent bevel gear B64, each shaft A62 drives the internally threaded sleeve 67 threadedly matched therewith to extend radially outwards in the ring sleeve B59, and the arc plate 69 installed at the end of the internally threaded sleeve 67 forms a pressing force against the borehole 1 wall, thereby achieving the purpose of fixing and supporting the swing limiting mechanism 58 in the borehole 1, and further achieving the swing limiting of the swing rod 25, so that the swing rod 25 only produces vertical axial sliding relative to the ring sleeve D70, and further limiting the swing of the impact cone 5 around the contact point between the impact cone 5 and the slope 3 at the bottom of the cave 2 under the action of the gentle slope 3 at the bottom of the cave 2.

[0057] At this time, the impact drilling mechanism 4 is pulled by the steel wire rope A57 to move vertically in a small amplitude, so that the impact cone 5 moving in a small amplitude impacts the gentle slope 3 at the bottom of the cave 2 and finally impacts a hole on the gentle slope 3 at the bottom of the cave 2, effectively reducing the frequency of the impact of the impact drilling mechanism 4 by the impact block 55 when encountering the cave 2, reducing equipment wear and tear, and effectively prolonging the service life of the equipment. At the same time, under the cooperation of the swing limiting mechanism 58, the impact drilling mechanism 4 can effectively impact the borehole 1 on the slope 3 at the bottom of the cave 2 without putting stone into the cave 2. When the impact drilling of the borehole 1 at the bottom of the cave 2 is completed, the arc plate 69 on the swing limiting mechanism 58 is separated from the borehole 1 wall by pulling the steel wire rope B73 in the opposite direction, and the swing limiting mechanism 58 is hoisted out of the borehole 1 and separated.

[0058] In summary, the beneficial effects of the present application are: the present application carries out impact drilling 1 operation on rock strata under the reciprocating traction of the steel wire rope A57 to the impact drilling mechanism 4, when the impact drilling mechanism 4 encounters the karst cave 2 and reaches the steep slope 3 at the bottom of the karst cave 2, the impact drilling mechanism 4 is swung around the contact point between the impact drilling mechanism 4 and the slope 3 at the bottom of the karst cave 2 by small-amplitude reciprocating pulling of the steel wire rope A57, so that the impact block 55 in the impact drilling mechanism 4 forms a violent impact on the impact cone 5 in the process of swinging the impact drilling mechanism 4 from the inclined state to the vertical state, so that the impact cone 5 impacts the contact point between the impact cone 5 and the slope 3 at the bottom of the karst cave 2 horizontally and finally forms a platform that facilitates the impact drilling mechanism 4 to vertically impact drill 1 at the bottom of the karst cave 2, and the impact drilling mechanism 4 continues to carry out vertical impact drilling 1 operation on the platform. The whole impact drilling 1 process does not need to put a large amount of stone into the karst cave 2, so as to avoid the large loss of mud used to protect the hole wall and discharge residue in the drilling 1 due to the insufficient amount of stone preparation, and at the same time avoid the deviation of the impact drilling 1 at the bottom of the karst cave 2 due to the unreasonable position of the stone caused by the lack of experience in stone placement, effectively improving the impact drilling 1 efficiency of karst geology. In addition, when the impact drilling mechanism 4 encounters a gentle slope 3 at the bottom of the karst cave 2, the swing limiting mechanism 58 cooperating with the impact drilling mechanism 4 will limit the swing of the impact cone 5 around the contact point between the impact cone 5 and the slope 3 at the bottom of the karst cave 2, so that the impact drilling mechanism 4 vertically reciprocatingly impacts the gentle slope 3 at the bottom of the karst cave 2 under the action of its own weight and finally forms a vertical drilling 1 on the gentle slope 3 at the bottom of the karst cave 2, effectively reducing the impact of the impact block 55 on the impact drilling mechanism 4, reducing equipment wear and tear, and prolonging the service life of the equipment.

[0059] The impact device of the present application is suitable for the case where the karst cave is larger than the impact drill, otherwise the impact drill cannot work.

Claims

1. A device for preventing deviation of a borehole for a karst geology pile foundation, characterized in that: It includes an impact drilling mechanism and a swing limiting mechanism. The impact drilling mechanism is suspended on the steel wire rope A of the impact drilling machine. Under the reciprocating traction of the steel wire rope A, the impact drilling mechanism reciprocates to impact and break the rock strata, thereby forming an impact drill hole in the rock strata. When the impact drilling mechanism encounters and reaches the steep slope at the bottom of the cave, the impact drilling mechanism is reciprocated by the steel wire rope A. The impact block of the impact drilling mechanism itself impacts the impact drilling mechanism as it swings back from an inclined state to a vertical state around the contact point with the bottom slope of the cave. Under the reciprocating impact of the impact block, the impact drilling mechanism impacts the contact point with the bottom slope of the cave and finally forms a platform on the bottom slope of the cave that allows the impact drilling mechanism to perform vertical impact drilling operations. The impact drilling mechanism is equipped with a swing limiting mechanism that cooperates with the borehole wall. The swing limiting mechanism prevents the impact drilling mechanism from swinging when it reaches the gentle slope at the bottom of the cave and assists the impact drilling mechanism in making vertical impact drilling holes on the gentle slope at the bottom of the cave. The aforementioned impact drill mechanism includes an impact cone, a rotating sleeve, a sliding rod, spring A, a circular plate, a trigger rod, a rocker arm, an arc-shaped sliding sleeve, and an impact block. The five-pronged impact cone has a cylindrical platform at its top, and a rocker arm connected to wire rope A is ball-jointed at the top of the cylindrical platform. The rocker arm cooperates with a limiting mechanism. A sliding rod slides vertically in the middle of the impact cone, and a spring A is nested on the sliding rod for its reset. A circular plate mounted at the top of the sliding rod contacts and cooperates with a trigger rod mounted at the end of the rocker arm. A rotating sleeve and an impact block slide around the central axis of the arc-shaped sliding sleeve, impacting each other. The rotating sleeve is nested and rotates on the cylindrical platform. The rotating sleeve and the arc-shaped sliding sleeve have a mechanism that positions the rotating sleeve at the middle of the arc-shaped sliding sleeve. The structure includes a locking mechanism at one extreme position within the arc-shaped sliding sleeve, driven by a sliding rod. This mechanism unlocks the rotating sleeve at the middle position within the arc-shaped sliding sleeve when the cylindrical platform swings from a vertical position, and locks the rotating sleeve at one extreme position within the arc-shaped sliding sleeve when the cylindrical platform swings from an inclined position to a vertical position. The arc-shaped sliding sleeve also has a structure that locks the impact block furthest from the rotating sleeve within the arc-shaped sliding sleeve. This structure locks the position of the impact block furthest from the rotating sleeve when the cylindrical platform swings from a vertical position, and unlocks the position of the impact block furthest from the rotating sleeve when the cylindrical platform swings from an inclined position to a vertical position.

2. The equipment for drilling a non-deviated hole for a karst geology pile foundation according to claim 1, characterized in that: The aforementioned sliding rod slides in the groove A within the cylindrical platform, and the circular plate moves within the circular groove A at the top of the groove A. Two guide blocks A are symmetrically installed on the sliding rod, and the two guide blocks A slide within two guide grooves A on the inner wall of the groove A, respectively. Spring A is located within an annular groove A on the inner wall of the groove A. One end of spring A is connected to the inner wall of the annular groove A, and the other end is connected to a tension spring ring A installed on the sliding rod. A circular ring A is nested on the cylindrical platform, and the circular ring A rotates within an annular groove C on the inner wall of the rotating sleeve. A slider slides vertically within the groove A, and a rack B installed at the upper end of the slider is connected to a spur gear installed within the groove A. B meshes with the spur gear B, which is connected to the coaxial spur gear A via a bushing. The spur gear A meshes with the rack A installed at the lower end of the slide rod. An annular groove B is provided on the outer side of the cylindrical platform, and an annular sleeve A is rotatably fitted inside the annular groove B. The annular sleeve A is fixed to the slider by four circumferentially evenly distributed connecting blocks. The four connecting blocks slide vertically in four grooves B on the inner wall of the groove A that communicate with the annular groove B. Two guide blocks B are symmetrically installed on the rotating sleeve, and the two guide blocks B slide in two guide grooves B on the inner wall of the arc-shaped annular sleeve. Two grooves C are symmetrically provided on the inner wall of the rotating sleeve that communicate with its outer side. Each groove C has a sleeve that slides in a groove E on a ring sleeve A. The inner wall of groove E has a transition slope to facilitate the sleeve sliding out of groove E along the central axis of the cylindrical truncated cone. Each sleeve has a spring B nested inside for its reset. Each sleeve has a limiting block A that slides in a corresponding upper limit groove A and limiting groove B on the inner wall of the arc-shaped sleeve. Each sleeve has a spring C installed inside to reset the corresponding limiting block A. Two guide blocks E are symmetrically installed on the impact block, and the two guide blocks E slide in two guide grooves B on the inner wall of the arc-shaped sleeve, respectively. The impact block and the end of the inner wall of the arc-shaped sleeve are connected. Two limiting blocks B slide within two symmetrically distributed grooves D nearby; each limiting groove A has a trigger block A that slides within it, cooperating with the corresponding limiting block A; each limiting groove B has a trigger block B that slides within it, cooperating with the corresponding limiting block A; trigger blocks A, B, and limiting blocks B on the same side are mounted on the same connecting rod, which slides within an arc-shaped sleeve in a groove E that communicates with the limiting grooves A, B, and D on the same side; two springs D are symmetrically installed in groove E to reset the corresponding connecting rod; one end of spring D is connected to the connecting rod, and the other end is connected to the inner wall of groove E.

3. The equipment for drilling a non-deviated hole for a karst geology pile foundation according to claim 2, characterized in that: The aforementioned spring B is located in the annular groove D on the inner wall of the corresponding slide groove C; one end of the spring B is connected to the inner wall of the corresponding annular groove D, and the other end is connected to the tension spring ring B installed on the corresponding outer sleeve; two guide blocks C are symmetrically installed on the limiting block A, and the two guide blocks C slide in the two guide grooves C on the inner wall of the corresponding outer sleeve respectively; one end of the spring C is connected to the inner wall of the corresponding outer sleeve, and the other end is connected to the end face of the corresponding limiting block A.

4. The drilling equipment for preventing deviation of pile foundations in karst geological conditions according to claim 2, characterized in that: The bottom of the aforementioned impact cone is evenly and densely covered with impact teeth; the limiting groove A is located in the middle of the inner wall of the corresponding side of the arc-shaped sliding sleeve, and the limiting groove B and the sliding groove D are located near the two ends of the inner wall of the corresponding side of the arc-shaped sliding sleeve, respectively; the curvature of the limiting groove B along the direction of the sliding of the rotating sleeve relative to the arc-shaped sliding sleeve is greater than the curvature of the limiting groove A.

5. The drilling equipment for preventing deviation of pile foundations in karst geological conditions according to claim 1, characterized in that: The aforementioned limiting mechanism includes a ring sleeve B, a shaft A, a bevel gear A, a bevel gear B, a ring sleeve C, an internal threaded sleeve, a guide block D, an arc plate, a ring sleeve D, a winding wheel, a wire rope B, and a protective cover. The ring sleeve B has several circumferentially evenly spaced circular grooves B on its sidewall, each containing a radial shaft A that rotates within it. Each shaft A is equipped with a bevel gear A, and two adjacent bevel gears A simultaneously mesh with bevel gears B mounted on the inner wall of the ring sleeve B. Each shaft A is threaded with an internal threaded sleeve, which slides radially within the corresponding circular groove B. Inside the installed ring C; an arc plate that mates with the inner wall of the borehole is installed at the end of the internal threaded sleeve; a winding wheel is installed on a shaft A, and the winding wheel is located in the receiving groove on the inner wall of the corresponding circular groove B; several turns of steel wire rope B are wound on the winding wheel, and the two ends of the steel wire rope B are connected to the electric module installed on the impact drilling machine. The electric module drives the winding wheel to rotate through the steel wire rope B; inside the ring B, a ring D with the same central axis is installed through several fixed rods evenly distributed around the circumference; the ring D mates with the swing arm in the impact drilling mechanism.

6. The drilling equipment for preventing deviation of pile foundations in karst geological conditions according to claim 5, characterized in that: Two guide blocks D are symmetrically installed on the aforementioned internal threaded sleeve. The two guide blocks D slide in the two guide grooves D on the inner wall of the ring sleeve C respectively. A protective cover is installed on the inner wall of the ring sleeve B to isolate the bevel gears A and B from the mud.

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