Branch anchor expanding tool

Abstract

The utility model relates to the technical field of branch anchor rod construction, in particular to a branch anchor expanding tool. Comprising a connecting device, an upper linear driving motor, an extruding and expanding arm, a secondary sliding strip, a main rod, a connecting rod, a connecting plate, a lower linear driving motor, a screw rod, a threaded sleeve, a main sliding strip and a ball. The screw and the threaded sleeve are located in the squeezing and expanding arm, the motor drives the screw to rotate, the threaded sleeve is driven to slide axially, and therefore the squeezing and expanding arm extends. The squeezing and expanding arms are connected to the left and right sides of the upper and lower linear driving motors; the upper and lower linear driving motors are connected to the upper and lower parts of the main rod and drive the squeezing and expanding arms to move up and down by driving the upper and lower linear driving motors; a sliding groove is formed between the upper linear driving motor, the lower linear driving motor and the main rod and matched with the upper linear driving motor and the lower linear driving motor to prevent the upper linear driving motor and the lower linear driving motor from rotating, and the squeezing and expanding arm can contract smoothly. The squeezing and expanding arms are connected through the connecting rods and the connecting rod plates, and when the squeezing and expanding arms are in the horizontal state, hole forming of the cylindrical squeezing and expanding anchor can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical anchoring, and particularly relates to a disk-expanded anchor tool. Background Art

[0002] Nowadays, with the acceleration of the urbanization process and the continuous increase of human activities such as buildings and transportation facilities, land resources have become increasingly scarce. At the same time, due to natural disasters, geological disasters and other reasons, the soil conditions in many areas are not ideal, such as soft soil layers, karst strata, etc. This requires the use of more efficient foundation treatment technologies in the construction process to meet the requirements of buildings and transportation facilities for foundation bearing capacity, seismic resistance, liquefaction resistance, etc.

[0003] In actual engineering structures, due to the action of horizontal loads such as wave loads and wind loads, or the action of vertical loads such as frost heaving force of foundation soil and buoyancy of groundwater, the foundation needs to have good uplift bearing capacity. Obviously, the expanded disk anchor can improve its uplift bearing capacity due to the presence of disks on the surface of the anchor rod body. Compared with ordinary grouted anchor rods, the expanded disk anchor can make full use of the hard soil layers at all parts up and down the pile, thus changing the force mechanism of ordinary equal-diameter bored grouted anchor rods, changing the friction anchor into a friction end-bearing anchor, and having a high single-anchor bearing capacity. The disks of the disk anchor are supported by the surrounding soil, making the building structure stable and earthquake-resistant, with smaller settlement and deformation; its bearing capacity per unit volume of concrete is more than twice that of the corresponding straight-hole anchor, resulting in significant economic benefits. Content of the Utility Model

[0004] The utility model provides a disk-expanded anchor tool, aiming to improve the strength of buildings on soft foundations.

[0005] For this reason, the utility model adopts the following technical solutions:

[0006] A disk-expanded anchor tool includes a connecting device, an upper linear drive motor, a main rod, a lower linear drive motor and a support seat which are connected in sequence from top to bottom; the upper linear drive motor and the lower linear drive motor move towards or away from each other along the main rod, so as to drive the expanding arms connected to the left and right sides of the upper and lower linear drive motors to move towards or away from each other;

[0007] Upper expanding arms are respectively hinged to the left and right sides of the upper linear drive motor. When in the expanding state, the two upper expanding arms are arranged in a "Λ" shape; lower expanding arms are respectively hinged to the left and right sides of the lower linear drive motor. When in the expanding state, the two lower expanding arms are arranged in a "V" shape; the upper expanding arms and the lower expanding arms are symmetrically arranged up and down, and the heads of the opposite upper expanding arms and lower expanding arms are rotatably connected; when the upper and lower linear drive motors approach, the included angle between the upper expanding arms and the lower expanding arms becomes smaller; when the connecting device and the support seat move away from each other, the included angle between the upper expanding arms and the lower expanding arms becomes larger.

[0008] Furthermore, the cross-section of the main rod is cylindrical, and the upper and lower linear drive motors are slidably sleeved with the main rod through cylindrical through-holes.

[0009] Furthermore, a rectangular main sliding strip is connected to the side of the main rod along the vertical direction, and corresponding sliding grooves are provided on the upper and lower linear drive motors. The sliding grooves cooperate with the main sliding strip to prevent the upper and lower linear drive motors from rotating, so that the extrusion and expansion arms can contract smoothly.

[0010] Furthermore, the extrusion and expansion arm is a telescopic structure, including a fixed support arm and a telescopic support arm. The telescopic support arm is slidably connected to the fixed support arm, and the telescopic support arm can slide and expand along the fixed support arm.

[0011] Furthermore, a driving member is connected between the telescopic support arm and the fixed support arm, and the driving member is used to drive the telescopic support arm to perform telescopic movement.

[0012] Furthermore, the driving member includes a motor, a screw rod, a threaded sleeve and a limit anchor; the motor is fixed on the fixed support arm, the threaded sleeve is fixed on the telescopic support arm, the screw rod is connected between the motor and the threaded sleeve, the screw rod is threadedly connected to the telescopic support arm, the rotation of the motor drives the screw rod to rotate, the rotation of the screw rod drives the balls in the threaded sleeve to rotate, and then pushes the telescopic support arm to move; the limit anchor is used to limit the maximum moving distance of the telescopic support arm.

[0013] Furthermore, the secondary sliding strip is of a rectangular structure and is arranged on both sides of the outer surface of the telescopic support arm, and cooperates with the secondary sliding groove on the inner surface of the fixed support arm to increase the sliding ability when the telescopic support arm moves axially.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. High applicability: The squeezed-expanded branch and plate pile is applicable to various soil types, including soft soil layers, cohesive soil, sandy soil, cobblestones, etc. However, traditional foundation treatment methods have problems such as limited application scope, difficult construction, and high cost. Therefore, the research on the squeezed-expanded branch and plate pile has important practical application value.

[0016] 2. Simple construction and good economy: The construction process of the squeezed-expanded branch and plate pile is relatively simple. A common drill is used to form a hole, and branches and plates are formed within the depth range of the anchor body through a special device. Compared with traditional foundation treatment methods, it has a short construction period, low cost, and little environmental impact during the construction process. Therefore, the research on the squeezed-expanded branch and plate anchor is crucial for promoting its application in actual projects.

[0017] 3. High load-bearing capacity: The squeezed-expanded branch pile increases the end resistance and side friction resistance of the pile to improve its bearing, uplift, and horizontal load resistance capabilities. Therefore, in large-scale engineering projects such as transmission lines, heavy-haul railways, ports, and docks, the squeezed-expanded branch pile has been widely used. Its research is of great significance for improving the safety and stability, seismic resistance, liquefaction resistance of buildings, and reducing settlement.

[0018] 4. Promote national infrastructure construction: As a new foundation treatment technology, the research on the squeezed-expanded branch pile will promote the development of national infrastructure construction, including the construction of safe, reliable, and durable transportation systems, water conservancy projects, energy projects, etc. Therefore, the research on the squeezed-expanded branch pile also plays a very important role in promoting the development of the national economy and society. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the anchor expanding tool of the present utility model;

[0020] Figure 2 is a schematic diagram of the squeezed-expanded arm of the present utility model in a horizontal state;

[0021] Figure 3 is a schematic structural diagram of the extended state of the squeezed-expanded arm of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the non-extended state of the squeezed-expanded arm of the present utility model;

[0023] Figure 5 is a schematic cross-sectional structure diagram of the non-extended squeezed-expanded arm with an integral screw and a ball of the present utility model;

[0024] In the figure: 1. Connecting device; 2. Upper linear drive motor; 3. Fixed support arm; 4. Telescopic support arm; 5. Secondary slide bar; 6. Connecting rod; 7. Connecting rod plate; 8. Support seat; 9. Lower linear drive motor; 10. Motor; 11. Screw; 12. Threaded sleeve; 13: Main rod; 14: Main slide bar; 15. Secondary slide groove; 16. Motor support; 17. Limit anchor; 18. Ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] As Figure 1As shown in the figure, a branch plate expanding and anchoring tool of the present utility model mainly includes a connecting device 1, an upper linear driving motor 2, an expanding arm, a secondary sliding strip 5, a main rod 13, a connecting rod 6, a connecting rod wrench 7, a lower linear driving motor 9, a screw rod 11, a threaded sleeve 12, a main sliding strip 14, and a ball 18; the screw rod 11 and the threaded sleeve 12 are located inside the expanding arm. The screw rod 11 is driven by a motor to rotate, driving the threaded sleeve 12 to perform axial sliding so as to realize the elongation of the expanding arm. The inside of each of the 4 expanding arms is the same; the 4 expanding arms are connected to the left and right sides of the upper and lower linear driving motors, 2 in the upper part and 2 in the lower part; the upper and lower linear driving motors are connected to the upper and lower parts of the main rod 13. By driving the upper and lower linear driving motors, the expanding arms are driven to move up and down; there is a sliding groove between the upper and lower linear driving motors and the main rod 13. The sliding groove is used to prevent the upper and lower linear driving motors from rotating, enabling the expanding arms to contract smoothly; the expanding arms are connected to each other through the connecting rod 6 and the connecting rod plate 7. When the expanding arms are in a horizontal state, cylindrical expanding and anchoring holes can be formed.

[0027] Linear driving motors are arranged at the upper and lower parts of the main rod. The cross-section of the main rod 13 is cylindrical. Its function is to enable the upper and lower linear driving motors to perform axial movement through its through hole, realizing the expansion and contraction states of the expanding arms. The upper and lower linear driving motors are slidably sleeved with the main rod through the cylindrical through hole.

[0028] The cross-section of the main rod 13 is connected with a rectangular main sliding strip 14. A sliding groove is arranged between the upper and lower linear driving motors and the main rod 13. When the linear driving motor moves axially along the main rod 13, the main sliding strip 14 cooperates with the sliding groove to prevent the upper and lower linear driving motors from rotating, enabling the expanding arms to expand and contract smoothly.

[0029] The outer surface of the threaded sleeve 12 is a smooth arc surface, and its inner surface is provided with threads and balls. The secondary thread is matched with the screw rod 11, and it has upper and lower openings and is a through-hole structure. A limiting anchor 17 is arranged on the top surface of the screw rod 11 to prevent the threaded sleeve 12 from exceeding the length range of the screw rod 11 due to the action of the motor. The threaded sleeve 12 and the bottom rectangular plate of the telescopic support arm 4 are an integral structure. The threaded sleeve 12 is located at the cylindrical through hole in the center of the rectangular plate. The telescopic support arm 4, the rectangular plate, and the threaded sleeve 12 are an integral structure.

[0030] The linear drive motor is combined with the threaded sleeve 12. The motor drive drives the telescopic arm 4 to move linearly through the screw action to realize the expansion and contraction of the expansion arms. The way of realizing transmission by relying on the sliding friction between the screw pairs is called sliding screw drive. The most commonly used sliding screw is trapezoidal lead screw drive. Although the trapezoidal lead screw drive can realize the conversion of rotational motion into linear motion, has a simple structure and low cost, due to the sliding friction between the screw pairs, the resistance is inevitably large, it is easy to wear, and the transmission accuracy and efficiency are not high. In order to improve the transmission accuracy and efficiency, we change the thread profile to an arc shape and implant the balls 18 between the screw pairs, replacing the sliding friction with rolling friction. In this way, we obtain the ball 18 screw assembly with precise transmission and higher efficiency.

[0031] The screw rod 11 is matched with the threaded sleeve 12. The motor at the lower part of the screw rod drives the screw rod to rotate. Due to the internal thread of the threaded sleeve 12 and the action of the balls, the threaded sleeve 12 is driven to move axially. Since the threaded sleeve 12 and the telescopic arm 4 are of an integral structure, the axial movement of the threaded sleeve 12 is the axial movement of the telescopic arm 4, so as to realize the elongation and contraction of the expansion arms.

[0032] The secondary slide bar 5 is of a rectangular structure and is arranged on both sides of the outer surface of the telescopic arm 4, and is matched with the corresponding two slide grooves on the inner surface of the fixed arm 3. When the telescopic arm 4 moves axially, the secondary slide bar moves along the slide groove to increase its sliding ability and enhance the telescopic ability of the telescopic arm.

[0033] As Figure 3 and 4 shown, the upper and lower expansion arms are mainly connected to the hollow connecting piece on the telescopic arm 4 through the connecting rod 6, and then the connecting rod 6 is connected through the connecting rod plate 7, so as to realize the connection of the upper and lower expansion arms. This device includes three components: the connecting rod 6, the hollow connecting piece on the telescopic arm 4, and the connecting rod plate 7. The positions and connection relationships among the components are as follows: the connecting rod 6 passes through the hollow connecting piece on the telescopic arm 4 to connect the connecting rod 6 and the telescopic arm 4; cylindrical through holes are symmetrically arranged on the upper and lower parts of the connecting rod plate 7. The connecting rod plays a transitional role to connect the telescopic arm 4 and the connecting rod plate 7, while the connecting rod plate 7 plays a connecting role to connect the upper and lower expansion arms.

[0034] The upper and lower linear drive motors are of a cuboid structure, and hollow connecting pieces are symmetrically arranged on the left and right sides. A total of four hollow connecting pieces are arranged on one linear drive motor. The expansion arms are connected to the linear drive motor as a whole through the connecting rod by means of the hollow connecting pieces. When the linear drive motor moves axially along the main rod, it drives the telescopic arm to expand and contract, so as to realize the expansion and anchoring.

Claims

1. A branch plate expansion and anchoring tool, characterized in that: From top to bottom, it includes a connecting device, an upper linear drive motor, a main rod, a lower linear drive motor and a support seat connected in sequence; the upper linear drive motor and the lower linear drive motor move toward or away from each other along the main rod, thereby driving the squeezing and expanding arms connected to the left and right sides of the upper and lower linear drive motors to move toward or away from each other; Upper squeezing and expanding arms are hinged on the left and right sides of the upper linear drive motor respectively. When in the squeezing and expanding state, the two upper squeezing and expanding arms are arranged in a "Λ" shape; lower squeezing and expanding arms are hinged on the left and right sides of the lower linear drive motor respectively. When in the squeezing and expanding state, the two lower squeezing and expanding arms are arranged in a "V" shape; the upper squeezing and expanding arms and the lower squeezing and expanding arms are symmetrically arranged up and down, and the head ends of the upper squeezing and expanding arms and the lower squeezing and expanding arms are rotationally connected relative to each other; when the upper and lower linear drive motors are close to each other, the angle between the upper squeezing and expanding arms and the lower squeezing and expanding arms becomes smaller; when the upper and lower linear drive motors are separated, the angle between the upper squeezing and expanding arms and the lower squeezing and expanding arms becomes larger.

2. A branch plate anchor expansion tool according to claim 1, characterized in that: The cross section of the main rod is cylindrical, and the upper and lower linear drive motors are slidably sleeved with the main rod through cylindrical through holes.

3. A branch plate anchor expansion tool according to claim 2, characterized in that: A rectangular main slide is connected to the side of the main rod in the vertical direction. The upper and lower linear drive motors are provided with corresponding slide grooves. The slide grooves cooperate with the main slide to prevent the upper and lower linear drive motors from rotating, so that the squeezing and expansion arms can be smoothly retracted.

4. A branch plate anchor expansion tool according to claim 1, characterized in that: The squeezing and expanding arm is a telescopic structure, comprising a fixed arm and a telescopic arm. The telescopic arm is slidably connected to the fixed arm, and the telescopic arm can slide and telescope along the fixed arm.

5. A branch plate anchor expansion tool according to claim 4, characterized in that: A driving member is connected between the telescopic support arm and the fixed support arm, and the driving member is used to drive the telescopic support arm to perform telescopic movement.

6. A branch plate anchor expansion tool according to claim 5, characterized in that: The driving component includes a motor, a screw, a threaded sleeve and a limit anchor; the motor is fixed on the fixed arm, the threaded sleeve is fixed on the telescopic arm, the screw is connected between the motor and the threaded sleeve, the screw is threadedly connected to the telescopic arm, the rotation of the motor drives the screw to rotate, the rotation of the screw drives the ball in the threaded sleeve to rotate, and then pushes the telescopic arm to move; the limit anchor is used to limit the maximum moving distance of the telescopic arm.

7. A branch plate anchor expansion tool according to claim 4, characterized in that: The secondary slide bar is a rectangular structure, which is arranged on both sides of the outer surface of the telescopic arm and cooperates with the secondary slide groove on the inner surface of the fixed arm to increase the sliding capacity when the telescopic arm moves axially.

Images