Prestressed anchor cable drilling auxiliary device

Abstract

This utility model discloses a prestressed anchor cable drilling auxiliary device, belonging to the technical field of drilling auxiliary devices. It solves the problem that existing technologies cannot promptly detect and adjust drilling deviations, easily leading to unsatisfactory final holes. This utility model includes a base, a support rod mounted on the base, a rotating component rotatably mounted on the support rod, and a monitoring structure rotatably mounted on the rotating component to monitor drilling deviations. The monitoring structure includes a U-shaped rotating seat rotatably mounted on the rotating component, a bidirectional threaded rod mounted on the U-shaped rotating seat, and deviation monitoring structures positioned on opposite sides of the bidirectional threaded rod. This utility model is used for assisting in prestressed anchor cable drilling.

Description

Technical Field

[0001] A prestressed anchor cable drilling auxiliary device is used to assist in the drilling of prestressed anchor cables, belonging to the technical field of drilling auxiliary devices. Background Technology

[0002] Prestressed anchor cables are used for active reinforcement in geotechnical engineering. The construction process is as follows: first, a hole is formed using a down-the-hole drill or a rotary drill. After the hole is formed, the prestressed anchor cable is placed in the hole, and then grouting, tensioning, and anchor sealing are carried out.

[0003] When using down-the-hole drills or rotary drills to drill holes, first use a total station to locate and mark the drilling points, then position the drill rig, adjust the tracks to the designed inclination angle, use an angle gauge to calibrate the direction of the drill rod, and then proceed with drilling.

[0004] When drilling, the drilling rig will vibrate, and the drilling rig itself is also quite heavy. Considering that the load on the drilling rig's placement position is unstable, the drilling rig is very likely to sink along with its placement position during the drilling process, which can easily cause the drilling hole to deviate.

[0005] In summary, the existing technology has the following technical problems: The inability to detect and adjust borehole deviations in a timely manner can easily lead to the final borehole not meeting the requirements. Utility Model Content

[0006] The purpose of this utility model is to provide a prestressed anchor cable drilling auxiliary device to solve the problem that the existing technology cannot detect and adjust the drilling deviation in time, which easily leads to the final hole not meeting the requirements.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A prestressed anchor cable drilling auxiliary device includes a base, a support rod disposed on the base, a rotating component rotatably disposed on the support rod, and a monitoring structure rotatably disposed on the rotating component for monitoring the deviation of the borehole. The monitoring structure includes a U-shaped rotating seat rotatably mounted on a rotating component, a bidirectional threaded rod mounted on the U-shaped rotating seat, and offset monitoring structures mounted on opposite sides of the bidirectional threaded rod.

[0008] Furthermore, the offset monitoring structure includes a threaded block with a threaded hole on a bidirectional threaded rod, an arc plate on the threaded block, a plurality of through holes evenly arranged on the arc plate along the circumference of the arc plate, an elastic reset telescopic rod on the through holes, and a flexible sensor on the elastic reset telescopic rod on the side that cooperates with the drill rod. The two threaded blocks are equipped with limiting rods that slide with the edge of the U-shaped rotating seat, and the two limiting rods are respectively located on the corresponding sides; When the central axis of the arc plate and the central axis of the drill rod are the same axis, the offset monitoring structure is in the initial state. In the initial state, the distance between each flexible sensor and the drill rod is greater than the maximum offset value of the drill rod.

[0009] Furthermore, the elastic reset telescopic rod includes a sleeve disposed on the perforation, a reset spring disposed inside the sleeve, a telescopic rod slidably disposed inside the sleeve and connected to the reset spring, and a flexible sensor disposed on the telescopic rod. The reset force of the reset spring is greater than the conduction force of the flexible sensor.

[0010] Furthermore, a protective sleeve is provided on the telescopic rod to protect the flexible sensor from stress.

[0011] Furthermore, a rotation limiting groove is provided on the support rod; The rotating component includes an inverted T-bolt rotatably disposed in a rotating limiting groove, a nut disposed on the inverted T-bolt for rotating and fixing the inverted T-bolt, and a U-shaped plate disposed on the inverted T-bolt, with through holes provided on the opposite side of the U-shaped plate; The U-shaped rotating seat is provided with a screw on one side that rotates with the through hole, and a T-shaped rod on the other side that rotates with the through hole. A nut is provided on the screw to rotate and fix the U-shaped rotating seat.

[0012] Furthermore, the support rod is an electrically operated telescopic rod or a hydraulically operated telescopic rod.

[0013] Furthermore, the bottom of the base is provided with conical teeth.

[0014] Compared with the prior art, the advantages of this utility model are: I. After the drill rod is aligned with the marked drilling point, this utility model adjusts the rotating part on the support rod and the U-shaped rotating seat on the rotating part, and adjusts the bidirectional threaded rod to make the offset monitoring structure sense the offset of the drill rod. This can detect the offset of the drill in time and make adjustments, thereby avoiding the problem of the hole not meeting the requirements. II. The two offset monitoring structures in this utility model cooperate with the threaded block nut through a bidirectional threaded rod. When the rotation of the offset monitoring structure is restricted by the limiting rod, the arc plate and the elastic reset telescopic rod on the arc plate and the flexible sensor are adjusted to move away from each other so that the drill rod can be placed between the two offset monitoring structures. Conversely, the two offset monitoring structures are adjusted to move closer to each other so that the offset monitoring structure is in its initial state. During the drilling process, if the drilling hole deviates and exceeds the maximum deviation value, the flexible sensor on the corresponding side will be pressed to conduct. The corresponding flexible sensor will then send a signal to the construction personnel, which is beneficial for the construction personnel to make quick adjustments when the drilling hole deviates. Furthermore, by setting the flexible sensor on the elastic reset telescopic rod, the elastic reset telescopic rod can be compressed when the flexible sensor is subjected to excessive force, thus avoiding the problem of easy damage to the flexible sensor. Third, the elastic reset telescopic rod in this utility model applies a reaction force to the flexible sensor by setting a reset spring inside the sleeve. That is, when the drill rod deviates and presses against the flexible sensor, since the reset force of the reset spring is greater than the conduction force of the flexible sensor, it can not only ensure that the flexible sensor can conduct feedback signals under force, but also ensure that the reset spring contracts under force. The telescopic rod and the flexible sensor on it will also contract synchronously, thereby avoiding the problem of easy damage to the flexible sensor. IV. The purpose of this utility model in providing a protective sleeve to protect the flexible sensor is to prevent the flexible sensor from being easily damaged by excessive force. V. The rotating component in this utility model is rotated and engaged with the rotating limiting groove by an inverted T-bolt and fixed by a nut, which makes rotation convenient and facilitates angle adjustment of the monitoring structure; VI. This utility model limits the support rod to a telescopic rod, which facilitates height adjustment according to needs; VII. The purpose of this utility model is to provide conical teeth on the base to facilitate fixing it to the ground. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the support rod of this utility model; Figure 3 This is a schematic diagram of the rotating component in this utility model; Figure 4 This is a schematic diagram of the monitoring structure in this utility model; Figure 5 for Figure 4 A schematic diagram of the unfolded structure; Figure 6 This is a schematic diagram of the offset monitoring structure in this utility model; Figure 7 This is a partial structural schematic diagram of the elastic reset telescopic rod in this utility model; Figure 8 This is a schematic diagram of the bottom structure of the base in this utility model; In the diagram: 1-base, 2-support rod, 3-rotating component, 4-monitoring structure, 5-U-shaped rotating seat, 6-bidirectional threaded rod, 7-offset monitoring structure, 8-threaded hole, 9-threaded block, 10-arc plate, 11-through hole, 12-elastic reset telescopic rod, 13-flexible sensor, 14-limiting rod, 15-reset spring, 16-telescopic rod, 17-protective sleeve, 18-rotational limiting groove, 19-inverted T-bolt, 20-nut, 21-U-shaped plate, 22-through hole, 23-screw, 24-T-shaped rod, 25-conical tooth, 26-sleeve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0021] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0024] Example 1 To address the problem that existing technologies cannot promptly detect and adjust borehole deviations, which can easily lead to substandard final boreholes. For example... Figure 1-8 As shown, a prestressed anchor cable drilling auxiliary device is provided, including a base 1, a support rod 2 disposed on the base 1, a rotating component 3 rotatably disposed on the support rod 2, and a monitoring structure 4 rotatably disposed on the rotating component 3 for monitoring the offset of the drilling hole; the monitoring structure 4 includes a U-shaped rotating seat 5 rotatably disposed on the rotating component, a bidirectional threaded rod 6 disposed on the U-shaped rotating seat 5, and offset monitoring structures 7 disposed on opposite sides of the bidirectional threaded rod 6.

[0025] In practice, after aligning the drill rod with the marked drilling point, the two offset monitoring structures 7 are moved apart by adjusting the bidirectional threaded rod 6. Then, the base 1 is installed at the designated position under the drill rod. At this point, the drill rod is positioned between the two offset monitoring structures 7. Next, the rotating component on the support rod and the U-shaped rotating seat on the rotating component are adjusted so that the central axis of the drill rod overlaps with or slightly deviates from the midpoint of the two offset monitoring structures 7 (as required). Then, the two offset monitoring structures 7 are brought closer together to the designated position by adjusting the bidirectional threaded rod 6. At this point, the offset monitoring structures are separated from the drill rod. After adjustment, drilling can begin. If deviation occurs during drilling, the drill rod will shift. When the deviation exceeds the distance between the offset monitoring structure and the initial drill rod, it will contact the offset monitoring structure, indicating that the drilling deviation is not up to standard. In this embodiment, after the drill rod is aligned with the marked drilling point, the offset monitoring structure senses the offset of the drill rod by adjusting the rotating part on the support rod and the U-shaped rotating seat on the rotating part, as well as adjusting the bidirectional threaded rod. This allows for timely detection and adjustment of the drilling offset, thereby avoiding the problem of the hole not meeting the requirements.

[0026] Example 2 Based on Embodiment 1, the offset monitoring structure 7 includes a threaded block 9 with a threaded hole 8 disposed on a bidirectional threaded rod 6, an arc plate 10 disposed on the threaded block 9, and multiple through holes 11 evenly disposed on the arc plate 10 (which can be a semi-circular arc plate or other arc-shaped structures) along the circumference of the arc plate 10. An elastic reset telescopic rod 12 is disposed on each through hole 11, and a flexible sensor 13 is disposed on the elastic reset telescopic rod 12 on the side that cooperates with the drill rod. Limiting rods 14 that slide and cooperate with the edge of the U-shaped rotating seat 5 are disposed on the two threaded blocks 9, and the two limiting rods 14 are respectively disposed on corresponding sides. When the central axis of the arc plate 10 and the central axis of the drill rod are the same axis, the offset monitoring structure 7 is in its initial state. In the initial state, the distance between each flexible sensor 13 and the drill rod is equal to the maximum allowable offset value of the drill rod. The flexible sensor 13 can be externally powered or have its own electromagnetic field, and the position of the transmitter can also be installed as needed to avoid easy damage under stress.

[0027] In practice, the bidirectional threaded rod 6 is rotated forward, and the two threaded blocks 9 engage with and move away from the bidirectional threaded rod 6 until the borehole can be positioned between the two arc plates 10. Then, the forward rotation is stopped. Next, the rotating component on the support rod and the U-shaped rotating seat on the rotating component are adjusted so that the central axis of the drill rod overlaps with or slightly deviates from the midpoint of the two offset monitoring structures 7 (as required). Then, the bidirectional threaded rod 6 is rotated in the reverse direction, and the two threaded blocks 9 engage with and move closer to the bidirectional threaded rod 6 until the distance between each flexible sensor 13 and the drill rod equals the maximum allowable offset value of the drill rod (the maximum offset value can be determined by limiting the position with the U-shaped rotating seat). After adjustment, drilling can begin. During drilling, if the borehole deviates and exceeds the maximum offset value, the corresponding flexible sensor will be pressed and activated. The corresponding flexible sensor will then send a signal to the construction personnel, allowing for quick adjustment when borehole deviation occurs. Furthermore, by placing the flexible sensor on the elastic reset telescopic rod, the elastic reset telescopic rod can be compressed when the flexible sensor is subjected to excessive force, thus avoiding the problem of easy damage to the flexible sensor.

[0028] Example 3 Based on Embodiment 2, the elastic reset telescopic rod 12 includes a sleeve 26 disposed on the through hole 11, a reset spring 15 disposed inside the sleeve 26, a telescopic rod 16 slidably disposed inside the sleeve 26 and connected to the reset spring 15, a flexible sensor 13 disposed on the telescopic rod 16, and the reset force of the reset spring 15 is greater than the conduction force of the flexible sensor 13.

[0029] In practice, during drilling, if the drill rod deviates and presses against the flexible sensor 13, and the flexible sensor 13 is activated by the force, if the deviation of the drill rod exceeds the maximum deviation value, the telescopic rod 16 will press against the reset spring 15 and slide it into the sleeve 26. This effectively prevents the deviation force from being fully applied to the flexible sensor. In this embodiment, the elastic reset telescopic rod applies a reaction force to the flexible sensor by setting a reset spring inside the sleeve. That is, when the drill rod deviates and presses against the flexible sensor, since the reset force of the reset spring is greater than the activation force of the flexible sensor, it not only ensures that the flexible sensor can activate the feedback signal, but also ensures that the reset spring contracts under force. The telescopic rod and the flexible sensor on it will also contract synchronously, thereby avoiding the problem of easy damage to the flexible sensor.

[0030] Example 4 Based on Embodiment 3, a protective sleeve 17 is provided on the telescopic rod 16 to protect the flexible sensor 13 from stress. The purpose of providing the protective sleeve to protect the flexible sensor is to prevent the flexible sensor from being easily damaged by excessive force.

[0031] Example 5 Based on embodiment 4, the support rod 2 is provided with a rotation limiting groove 18; the rotating component 3 includes an inverted T-bolt 19 rotatably disposed in the rotation limiting groove 18, a nut 20 disposed on the inverted T-bolt 19 for rotating and fixing the inverted T-bolt 19, and a U-shaped plate 21 disposed on the inverted T-bolt 19, with a through hole 22 disposed on the opposite side of the U-shaped plate 21; the U-shaped rotating seat 5 is provided with a screw 23 on one side that rotatably engages with the through hole 22, and a T-shaped rod 24 on the other side that rotatably engages with the through hole 22, with a nut disposed on the screw 23 for rotating and fixing the U-shaped rotating seat 5.

[0032] In practice, when the offset monitoring structure needs to be rotated, first adjust the nut 20 on the inverted T-bolt 19 to release its fixation. Then rotate the T-bolt 19 to the designated position, and finally fix it by engaging the nut on the inverted T-bolt 19 with the rotation limiting groove 18. When adjusting the U-shaped rotating seat 5, first loosen the nut on the screw 23, then rotate the U-shaped rotating seat 5 to the designated position, and finally fix it with the nut on the screw 23. This achieves rotational adjustment of the horizontal and vertical planes of the offset monitoring structure. The rotating component engages with the rotation limiting groove via the inverted T-bolt and is fixed with the nut, facilitating rotation and horizontal angle adjustment of the monitoring structure. The U-shaped rotating seat 5 engages with the T-shaped rod 24 and the screw 23 with the corresponding through hole and is fixed with the nut, facilitating vertical angle adjustment.

[0033] Of course, in practice, it cannot be ruled out that the rotating part 3 and the U-shaped rotating seat 5 may also be of other structures.

[0034] Example 5 Based on Example 4, the support rod 2 is an electrically operated telescopic rod or a hydraulically operated telescopic rod. Specifying the support rod as a telescopic rod facilitates height adjustment as needed.

[0035] Example 5 Based on embodiment 4, the bottom of the base 1 is provided with conical teeth 25, which is intended to facilitate fixing it to the ground. Of course, it is also possible to use a combination of mounting holes and conical rods.

Claims

1. A prestressed anchor cable drilling auxiliary device, characterized in that: Includes a base (1), a support rod (2) set on the base (1), a rotating part (3) rotatably set on the support rod (2), and a monitoring structure (4) rotatably set on the rotating part (3) for monitoring borehole offset. The monitoring structure (4) includes a U-shaped rotating seat (5) rotatably mounted on the rotating part, a bidirectional threaded rod (6) mounted on the U-shaped rotating seat (5), and an offset monitoring structure (7) mounted on both sides of the bidirectional threaded rod (6).

2. The prestressed anchor cable drilling auxiliary device according to claim 1, characterized in that: The offset monitoring structure (7) includes a threaded block (9) with a threaded hole (8) on a bidirectional threaded rod (6), an arc plate (10) on the threaded block (9), a plurality of through holes (11) evenly arranged on the arc plate (10) along the circumferential direction of the arc plate (10), an elastic reset telescopic rod (12) on the through hole (11), and a flexible sensor (13) on the elastic reset telescopic rod (12) on the side that cooperates with the drill rod. The two threaded blocks (9) are provided with limiting rods (14) that slide with the edge of the U-shaped rotating seat (5), and the two limiting rods (14) are respectively located on the corresponding sides; When the central axis of the arc plate (10) and the central axis of the drill rod are the same axis, the offset monitoring structure (7) is in the initial state. In the initial state, the distance between each flexible sensor (13) and the drill rod is equal to the maximum allowable offset value of the drill rod.

3. The prestressed anchor cable drilling auxiliary device according to claim 2, characterized in that: The elastic reset telescopic rod (12) includes a sleeve (26) disposed on the perforation (11), a reset spring (15) disposed inside the sleeve (26), a telescopic rod (16) slidably disposed inside the sleeve (26) and connected to the reset spring (15), and a flexible sensor (13) disposed on the telescopic rod (16). The reset force of the reset spring (15) is greater than the conduction force of the flexible sensor (13).

4. The prestressed anchor cable drilling auxiliary device according to claim 3, characterized in that: A protective sleeve (17) is provided on the telescopic rod (16) to protect the flexible sensor (13) from stress.

5. The prestressed anchor cable drilling auxiliary device according to claim 4, characterized in that: A rotation limiting groove (18) is provided on the support rod (2); The rotating component (3) includes an inverted T-bolt (19) rotatably disposed in a rotating limiting groove (18), a nut (20) disposed on the inverted T-bolt (19) to rotate and fix the inverted T-bolt (19), and a U-shaped plate (21) disposed on the inverted T-bolt (19), with a through hole (22) provided on the opposite side of the U-shaped plate (21). The U-shaped rotating seat (5) is provided with a screw (23) on one side that rotates with the through hole (22) and a T-shaped rod (24) on the other side that rotates with the through hole (22). The screw (23) is provided with a nut for rotating and fixing the U-shaped rotating seat (5).

6. The prestressed anchor cable drilling auxiliary device according to claim 1, characterized in that: The support rod (2) is an electric telescopic rod or a hydraulic telescopic rod.

7. The prestressed anchor cable drilling auxiliary device according to claim 1, characterized in that: The base (1) has a conical tooth (25) on its bottom.

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