Anchoring and combining device for anchor rods used in support engineering

Abstract

The present invention discloses an anchoring device for anchor rods used in supporting engineering, which can be detachably arranged at the end of the anchor rod and can realize anchoring or releasing of the end of the anchor rod, the anchoring device includes a shaft cylinder, a mandrel, a rotating body, and an expansion device, the mandrel can be driven to move backward based on the resistance pressure between the mandrel and the bottom of the borehole, an elastic component is arranged inside the shaft cylinder, a slide groove is arranged on the shaft cylinder, a movable seat is arranged outside the shaft cylinder, the expansion device includes at least one folding component, one end of the folding component is connected to the outside of the shaft cylinder, the other end of the folding component is connected to the movable seat, and a double-direction guide groove is arranged on the rotating body. The anchoring device of the present invention can be assembled at the end of the anchor rod, can realize anchoring or releasing of the end of the anchor rod, and has a simple structure, convenient operation, and can be applied to boreholes of different depths.

Description

Technical Field

[0001] The invention relates to an anchoring and combining device of an anchor rod for supporting engineering. Background Art

[0002] Anchor support is a common technology in civil engineering foundation pit support construction. It has the advantages of mature technology, simple construction, low cost and wide application range. It is especially suitable for foundation pits with large excavation areas.

[0003] The traditional anchor support construction process is: drilling holes on the slope of the foundation pit, inserting anchors, injecting cement mortar into the holes, and curing and hardening the cement mortar to support the soil wall. When the temporary support function fails, this traditional anchor cannot be recycled and eventually stays underground, occupying a lot of space, creating underground garbage, and having a great impact on the environment.

[0004] Chinese invention patent CN101469541B discloses a recyclable anchor rod, which includes an outer steel pipe, a screw rod is axially arranged inside the outer steel pipe, an upper cover plate is fixed to the top end of the outer steel pipe, an adjusting nut is rotatably arranged in the middle part of the upper cover plate, the upper part of the screw rod is connected to the adjusting nut by threaded rotation, a lower cover plate is fixed to the bottom end of the outer steel pipe, an anchor cone is arranged directly below the lower cover plate, the lower part of the screw rod is connected to the anchor cone, a plurality of upper connecting plates are arranged at the bottom end of the lower cover plate, each upper connecting plate is hingedly connected to the top end of an upper pull rod, the bottom end of each upper pull rod is respectively hingedly connected to the top end of a lower pull rod, the bottom end of each lower pull rod is respectively connected to a lower connecting plate through a pin shaft, and each lower connecting plate is respectively fixed to the upper part of the anchor cone. By adjusting the rotation of the nut, the opening and closing of the lower end of the upper pull rod and the upper end of the lower pull rod at the bottom of the anchor rod can be controlled, so that an anchoring effect can be played when the lower end of the upper pull rod and the upper end of the lower pull rod are opened. There is no need to pour cement mortar. The lower end of the upper pull rod and the upper end of the lower pull rod can be recovered after closing. It has the advantages of saving cost, not occupying underground space, and reducing environmental pollution.

[0005] However, the above patent solution has the following defects:

[0006] 1. When adjusting the rotation of the nut, the outer sleeve steel pipe needs to be positioned first to keep it relatively still. The operation is troublesome and requires the help of tools;

[0007] 2. For ease of operation, the nut and the rear end of the outer steel pipe always need to be kept outside the borehole. When the borehole is deeper, the length of the outer steel pipe needs to be increased accordingly, which increases the overall weight and production cost of the anchor rod, and also easily reduces the overall strength of the anchor rod. When used in drilling environments of different depths, anchor rods of suitable specifications need to be selected, which is inconvenient to use and has poor adaptability. Summary of the invention

[0008] In view of the above-mentioned deficiencies of the prior art, the present invention provides an anchoring combination device that can be assembled on the end of an anchor rod, which can realize the anchoring or releasing of the end of the anchor rod, and has a simple structure, easy operation, and can be applied to drilling holes of different depths.

[0009] In order to achieve the above-mentioned purpose, the present invention provides an anchoring and combining device for anchor rods used in supporting engineering, which can be detachably arranged at the end of the anchor rod and can realize the anchoring or releasing of the end of the anchor rod, the anchoring and combining device comprises a shaft cylinder, a push rod arranged at the front end of the shaft cylinder, a rotating body arranged on the inner side of the shaft cylinder, and an expansion device arranged on the outer side of the shaft cylinder, the push rod can be driven to move backward based on the resistance pressure between the push rod and the bottom of the borehole, and an elastic component is arranged on the inner side of the shaft cylinder to drive the push rod to move forward and reset when the resistance pressure is reduced or released, and the rotating body is based on the push rod. At least the backward movement is driven to rotate unidirectionally, a sliding groove connecting the inner and outer sides of the shaft cylinder is provided on the shaft cylinder, and a movable seat that can move along the sliding groove in the front and rear directions of the shaft cylinder is provided on the outside of the shaft cylinder. The expansion device includes at least one folding component, one end of the folding component is connected to the outside of the shaft cylinder, and the other end of the folding component is connected to the movable seat. The folding component opens or closes based on the front and rear movement of the movable seat, and a two-way guide groove cooperating with the guide of the movable seat is provided on the rotating body, and the movable seat reciprocates along the sliding groove based on the unidirectional rotation of the rotating body.

[0010] The beneficial effects of the present invention are as follows: the anchoring combination device of the present invention can be detachably configured at the end of the anchor rod, can be adapted to traditional anchor rods, can save construction costs, and when the anchoring combination device is inserted into the borehole together with the anchor rod, the push rod can be driven to move backward based on the resistance pressure between the push rod and the bottom of the borehole, and the push rod can be continuously reciprocated back and forth based on the resetting of the elastic component, and the push rod can drive the rotating body to rotate unidirectionally in a certain direction each time the push rod moves backward. Since the rotating body is provided with a double-directional guide groove, it can drive the movable seat to continuously reciprocate back and forth along the guide groove when rotating, thereby enabling the folding component to be continuously opened and closed; when in use, it is only necessary to drive the rear part of the anchor rod to move back and forth several times, and after the folding component is opened, it forms a limit fit with the inner wall of the borehole to prevent it from withdrawing backward. When disassembling, it is only necessary to operate the rear part of the anchor rod to move back and forth several times to fold the component, so that it can be completely removed from the borehole. The technical solution of the present invention can be adapted to drilling holes of different depths, the anchoring device can be recycled and reused, it is not easy to occupy the internal space of the land, will not cause pollution to the environment, and saves the construction cost of the support project.

[0011] Furthermore, the push rod is provided with a first bevel tooth portion that moves synchronously with the push rod, and the front end of the rotating body is provided with a second bevel tooth portion. When moving backward, the first bevel tooth portion contacts and cooperates with the second bevel tooth portion and drives the rotating body to rotate unidirectionally. The first bevel tooth portion cooperates with the circumferential limit of the shaft cylinder.

[0012] The advantage brought by the further arrangement is that when the push rod moves backward, it drives the first bevel tooth portion to move backward, and when it contacts the second bevel tooth portion, the component force along the circumferential direction between the bevel teeth drives the rotating body to rotate unidirectionally by a certain angle in a certain direction.

[0013] Furthermore, the push rod is provided with a third bevel tooth portion which moves synchronously with the push rod, and a fourth bevel tooth portion is provided at the rear end of the rotating body. When the third bevel tooth portion moves forward, it contacts and cooperates with the fourth bevel tooth portion and drives the rotating body to rotate unidirectionally in the same direction, and the third bevel tooth portion cooperates with the circumferential limit of the shaft cylinder.

[0014] The advantage brought by the further arrangement is that when the push rod is driven by the elastic component to move forward and reset, it drives the third bevel tooth portion to move forward. When it contacts the fourth bevel tooth portion, the component force along the circumferential direction between the bevel teeth drives the rotating body to continue to rotate unidirectionally in the said direction by a certain angle, thereby achieving the continuous movement of the push rod back and forth while driving the rotating body to continuously rotate unidirectionally in a certain direction.

[0015] Furthermore, the expansion device has at least two folding parts which are evenly distributed around the shaft cylinder in a circumferentially symmetrical manner, and the movable seat is annular and sleeved on the outside of the shaft cylinder.

[0016] The advantages brought by the further arrangement are: the limiting cooperation effect with the side walls around the drill hole can be improved, and the use of an annular movable seat can improve the synchronization of the actions between the folding parts.

[0017] Furthermore, an annular recess is arranged on the outer side of the shaft cylinder, and the slide groove and the movable seat are both arranged in the recess.

[0018] The advantages brought by the further arrangement are: on the one hand, the annular recess can limit the forward and backward movement direction of the movable seat, and on the other hand, it can make the overall structure of the anchoring device more compact, which is conducive to its movement in narrower drill holes.

[0019] Furthermore, a support seat is provided on the outer side of the shaft tube and is rotatably connected to one end of the folding component. The folding component includes a first extension arm and a second extension arm. One end of the first extension arm is rotatably connected to the support seat, the other end of the first extension arm is rotatably connected to one end of the second extension arm, and the other end of the second extension arm is rotatably connected to the movable seat.

[0020] The advantage brought by the further arrangement is that when the movable seat moves forward and backward along the shaft cylinder, it can drive the first extension arm and the second extension arm to rotate relative to each other, thereby realizing the opening and closing of the swinging component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 An enlarged view of part A;

[0023] Figure 3 A cross-sectional view of another use state of an embodiment of the present invention;

[0024] Figure 4 A structural diagram of a two-way guide rail according to an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the principle of cooperation between the helical teeth of the embodiment of the present invention Figure 1 ;

[0026] Figure 6 Schematic diagram of the principle of cooperation between the helical teeth of the embodiment of the present invention Figure 2 ;

[0027] Figure 7 This is a usage status diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiment of the anchoring combination device of the anchor rod for supporting engineering of the present invention is as follows: Figure 1-7As shown: it is detachably arranged at the end of the anchor rod 1 and can realize the anchoring or releasing of the end of the anchor rod 1. The anchoring combination device 2 includes a shaft cylinder 21, a push rod 22 arranged at the front end of the shaft cylinder 21, a rotating body 23 arranged on the inner side of the shaft cylinder 21, and an expansion device 3 arranged on the outer side of the shaft cylinder 21. The rear end of the shaft cylinder 21 is provided with a mounting hole 211. The end of the anchor rod 1 can be configured in the mounting hole 211 by means of clamping or screwing. The inner side of the shaft cylinder 21 has a chamber 212. The rear end of the push rod 22, The rotating bodies 23 are all accommodated in the chamber 212. The rear end of the push rod 22 can move forward and backward along the shaft cylinder 21. A circumferential limiting structure is provided between the push rod 22 and the shaft cylinder 21 to prevent the relative rotation of the two. The push rod 22 can be driven to move backward based on the resistance pressure between the push rod 22 and the bottom of the borehole. An elastic component 4 is provided on the inner side of the shaft cylinder 21, i.e., in the chamber 212, which drives the push rod 22 to move forward and reset when the resistance pressure is reduced or released. The elastic component 4 is a metal spring. Of course, other elastic elements, such as gas springs, etc., can also be used. The rotating body 23 is driven to rotate in one direction based on at least the backward movement of the push rod 22. In this embodiment, in order to improve the rotation effect of the rotating body 23, the push rod 22 can drive the rotating body 23 to rotate in one direction in a fixed direction when moving forward and backward. The shaft cylinder 21 is provided with a slide groove 213 connecting the inside and outside thereof, and the outside of the shaft cylinder 21 is provided with a movable seat 5 that can move along the slide groove 213 in the front and rear directions of the shaft cylinder. The expansion device 3 described in the present invention includes at least one folding component 31, one end of the folding component 31 is connected to the outside of the shaft cylinder 21, and the other end of the folding component 31 is connected to the movable seat 5. The folding component 31 can be opened or closed based on the relative approach or distance between the positions of its two ends. One end of the folding component 31 and the shaft cylinder 21 remain relatively still in the front and rear directions, and the folding component 31 is driven to open or close by the front and rear movement of the movable seat 5 connected to the other end of the folding component 31. When the folding component 31 of the expansion device 3 is opened, it can form a limiting fit with the inner wall of the bore a (for example Figure 7 The movable seat 5 is provided with a double-guide groove 231 on the outer peripheral surface of the rotating body 23, and the movable seat 5 includes a slider 51 that slides with the slide groove 213. The slider 51 passes through the slide groove 213 and is placed inside the chamber 212, and slides with the double-guide groove 231 of the rotating body 23. The movable seat 5 can reciprocate forward and backward along the slide groove 213 based on the unidirectional rotation of the rotating body 23.

[0029] The bidirectional guide groove 231 of the rotating body 23 is formed by Figure 4As shown, it is a common structure in the mechanical field, and its guide grooves are cross-shaped and spirally distributed on the outer peripheral surface of the rotating body 23. When it rotates continuously in a fixed direction and the slider 51 is limited relative to the axial circumference of the rotating body 23, the slider 51 that cooperates with the two-way guide groove 231 will continuously reciprocate linearly along the axial direction of the rotating body 23.

[0030] In order to enable the push rod 22 to drive the rotating body 23 to rotate when it moves backward, the push rod 22 is provided with a first beveled tooth portion 61 which moves synchronously with the push rod 22. The first beveled tooth portion 61 is fixedly connected to the push rod 22 and is affected by the circumferential limiting structure between the push rod 22 and the shaft cylinder 21. Therefore, the first beveled tooth portion 61 will not rotate relative to the shaft cylinder 21. A second beveled tooth portion 62 is provided at the front end of the rotating body 23. The second beveled tooth portion 62 is fixedly connected to the rotating body 23 and is limited as a whole in the front and rear directions of the shaft cylinder 21 and can only rotate. When moving backward, the first beveled tooth portion 61 contacts and cooperates with the second beveled tooth portion 62, and the circumferential component force can be used to drive the rotating body 23 to rotate in one direction.

[0031] In order to enable the push rod 22 to drive the rotating body 23 to rotate in the same direction when moving forward, the push rod 22 is provided with a third bevel tooth portion 63 which moves synchronously with the push rod 22, and a fourth bevel tooth portion 64 is provided at the rear end of the rotating body 23. The fourth bevel tooth portion 64 and the rotating body 23 are fixedly connected together, and are also limited in the front and rear directions of the shaft tube 21 and can only rotate. The third bevel tooth portion 63 contacts and cooperates with the fourth bevel tooth portion 64 when the push rod 22 is reset and moves forward, and the circumferential component force can be used to drive the rotating body 23 to rotate unidirectionally in the same direction. Such a design can increase the speed of opening and closing of the folding component 31 and improve construction efficiency.

[0032] The rotating body 23 has an inner hole through which the rear end of the push rod 22 can movably pass. The rear end of the push rod 22 passes through the inner hole of the rotating body 23 and is connected to the third bevel tooth portion 63. The elastic component 4 is located at the rear end of the chamber 212 and is sleeved on the rear end of the push rod 22. The elastic component 4 is respectively abutted against the rear end of the third bevel tooth portion 63 and the inner wall of the rear end of the chamber 212. This design can ensure the stability of the force direction of the elastic component 4 and is not easy to be damaged.

[0033] In the present embodiment, the expansion device 3 has two folding parts 31, and of course, in other embodiments, there may be three or more folding parts 31. These folding parts 31 are evenly distributed around the shaft cylinder 21 in a circumferentially symmetrical manner. The movable seat 5 is annular and sleeved on the outside of the shaft cylinder 21. The other ends of these folding parts 31 are simultaneously connected to a movable seat 5, and can be opened and closed synchronously to improve the limiting effect between the inner wall of the bore a.

[0034] An annular recess 214 is provided on the outer side of the shaft cylinder 21, and the slide groove 213 and the movable seat 5 are both provided in the recess 214. The two inner walls of the recess 214 along the axial direction of the shaft cylinder 21 can limit the movable range of the movable seat 5. Of course, in fact, the slide groove 213 can also limit its movable range. In addition, the movable seat 5 can be partially accommodated in the recess 214, making the overall structure more compact and convenient for shuttling in a narrower bore a.

[0035] The outer side of the shaft cylinder 21 is provided with a support seat 215 which is rotatably connected with one end of the folding component 31. The support seat 215 may also be annular, or may be a plurality of components which are evenly distributed on the outer side of the shaft cylinder 21 and are rotatably connected with the folding component 31 in a one-to-one manner. The support seat 215 is fixed to the shaft cylinder 21. The folding component 31 includes a first extension arm 311 and a second extension arm 312. One end of the first extension arm 311 is rotatably connected with the support seat 215 through a pin, and the other end of the first extension arm 311 is rotatably connected with one end of the second extension arm 312 through a pin, and the other end of the second extension arm 312 is rotatably connected to the movable seat 5 through a pin. In order to prevent the first extension arm 311 and the second extension arm 312 from being difficult to be driven to open when they are in a flush state, they can be configured to have a slight tilt angle between the first extension arm 311 and the second extension arm 312 in the initial closed state.

[0036] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An anchoring and combining device for anchor rods used in support engineering, characterized in that: The bolt is adapted to move in a forward or backward direction relative to the bearing of the bolt, wherein the bolt is adapted to move in a forward or backward direction relative to the bearing of the bolt. The movable seat is guided by a double-way guide groove, and the movable seat reciprocates along the slide groove based on the unidirectional rotation of the rotating body; the push rod is provided with a first bevel tooth portion that moves synchronously with the push rod, and the front end of the rotating body is provided with a second bevel tooth portion, and the first bevel tooth portion contacts and cooperates with the second bevel tooth portion when moving backward and drives the rotating body to rotate unidirectionally; the push rod is provided with a third bevel tooth portion that moves synchronously with the push rod, and the rear end of the rotating body is provided with a fourth bevel tooth portion, and the third bevel tooth portion contacts and cooperates with the fourth bevel tooth portion when moving forward and drives the rotating body to rotate unidirectionally in the same direction; a support seat is provided on the outside of the shaft cylinder with which one end of the folding component is rotatably connected, and the folding component includes a first extension arm and a second extension arm, one end of the first extension arm is rotatably connected with the support seat, the other end of the first extension arm is rotatably connected to one end of the second extension arm, and the other end of the second extension arm is rotatably connected to the movable seat.

2. The anchoring and combining device of anchor rod for supporting engineering according to claim 1 is characterized in that: The expansion device has at least two folding parts which are evenly distributed around the shaft cylinder in a circumferentially symmetrical manner. The movable seat is annular and sleeved on the outer side of the shaft cylinder.

3. The anchoring and combining device of anchor rod for supporting engineering according to claim 2 is characterized in that: An annular recess is arranged on the outer side of the shaft cylinder, and the slide groove and the movable seat are both arranged at the recess.

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