Self-propelled anchor rod with alloy drill bit

Abstract

The utility model provides a self-propelled anchor rod with an alloy drill bit, which comprises at least one hollow anchor rod body with two open ends, a hollow alloy drill bit arranged at the front end of the hollow anchor rod body, and a stop-grouting plug, a base plate and a nut which are sequentially arranged at the tail part of the hollow anchor rod body, one end of the mounting cylinder is in threaded connection with the alloy drill bit, the other end of the mounting cylinder is in threaded connection with the hollow anchor rod body, the first limiting assembly is arranged between the alloy drill bit and the mounting cylinder, and the second limiting assembly is arranged between the hollow anchor rod body and the mounting cylinder. The alloy drill bit and the hollow anchor rod body are connected and fixed through the threads and limited through the limiting assembly, relative rotation between the drill bit and the hollow anchor rod body in the drilling process is effectively avoided, the stability and reliability of the anchor rod in the drilling process are guaranteed, and the anchor rod is not prone to falling off. The grouting effect and efficiency are effectively improved by discharging grout from the grouting holes in the hollow anchor rod body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the anchoring support technical field, concretely relates to a self-feeding type anchor rod with alloy drill bit. BACKGROUND

[0002] In water conservancy and hydropower engineering, the treatment of dam slope is the key link to ensure the safety and stability of the project, and water conservancy and hydropower engineering is often located in a complex geological condition area, and the geological structure of the dam slope is various, and the rock mass of the slope often presents the conditions of broken, joint fissure development and uneven rock hardness, and the ordinary mortar anchor rod support often has poor effect under these complex geological conditions, and it is difficult to meet the demand of safety and stability of the project, in order to overcome these difficulties and improve the reliability and stability of the dam slope support, the self-feeding type grouting anchor rod emerges as the times require and is widely applied.

[0003] The self-feeding type grouting anchor rod is a kind of anchor rod integrating drilling, grouting and anchoring, mainly composed of a drill bit, a hollow anchor rod body, a pad, a nut and a grout stopper, in the supporting process, the self-feeding type grouting anchor rod can drill into the rock-soil body by using the drill bit and external power device (such as a drilling machine), when drilling to the predetermined depth, the hollow rod body structure can be directly used as a grouting channel for grouting operation, the grout is sprayed from the grout outlet hole of the drill bit to bond the surrounding rock-soil body, fills the cracks of the surrounding rock, and makes the anchor rod body and the surrounding rock-soil body bond together to form an anchoring body, the drilling efficiency is high, the construction efficiency is fast, and the integrity and stability of the rock mass are greatly enhanced, effectively resisting the sliding and collapse trend of the slope soil.

[0004] However, the self-feeding type grouting anchor rod still has some problems in the actual process: 1, the drill bit and the rod body are connected by threads in the prior art, so in the process of anchor rod drilling, the drill bit is prone to loosen and fall off due to friction between the anchor rod and the soil and rock stratum, which will affect the drilling and grouting process; 2, the self-feeding type grouting anchor rod only grouts through the grout outlet hole of the drill bit, the grouting process is relatively slow, and local grouting is prone to be unsatisfactory, which affects the overall density and strength of the rock mass. SUMMARY

[0005] The utility model discloses a self-feeding type anchor rod with alloy drill bit, which solves the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0007] The utility model provides a self-feeding anchor rod with alloy drill bit, including at least one hollow anchor rod body which is open at both ends, hollow alloy drill bit which is arranged at the front end of the hollow anchor rod body, and the tail of hollow anchor rod body is sequentially arranged with the stop plug, the backing plate and the nut, still include one end with the thread connection of alloy drill bit, the other end with the thread connection of hollow anchor rod body installation cylinder, the first limiting component which is arranged between alloy drill bit and installation cylinder, the second limiting component which is arranged between hollow anchor rod body and installation cylinder, and a plurality of grouting holes which are evenly arranged on the lateral wall of hollow anchor rod body.

[0008] Preferably, the installation cylinder includes: the first sleeve which is hollow and open at both ends and is provided with external threads on the outer lateral wall which are matched with the connection end of the alloy drill bit, and the second sleeve which is hollow and open at both ends and is provided with internal threads on the inner lateral wall which are matched with the hollow anchor rod body, and the first sleeve and the second sleeve are coaxially connected.

[0009] Preferably, the first limiting component includes: the first elastic limiting part which is arranged on the lower end lateral wall of the first sleeve, and the first limiting hole which is arranged on the lateral wall of the connection end of the alloy drill bit and is matched with the first elastic limiting part, and the second limiting component includes: the second elastic limiting part which is arranged on the upper end lateral wall of the second sleeve, and the second limiting hole which is arranged on the lateral wall of the end of the hollow anchor rod body and is matched with the second elastic limiting part.

[0010] Preferably, the first elastic limiting part includes: the first installation hole which is horizontally arranged on the lower end lateral wall of the first sleeve and is open outward, the first limiting part which is slidingly arranged in the first installation hole, the first spring which is connected at one end of the end part of the first installation hole and is connected at the other end with the first limiting part, the first limiting part is matched with the first limiting hole, the second elastic limiting part includes: the second installation hole which is horizontally arranged on the upper end lateral wall of the second sleeve and is open inward, the second limiting part which is slidingly arranged in the second installation hole, the second spring which is connected at one end of the end part of the second installation hole and is connected at the other end with the second limiting part, and the second limiting part is matched with the second limiting hole.

[0011] Preferably, the first limiting part and the second limiting part are the same in structure, the first limiting part includes: the first sliding cylinder which is slidingly arranged in the first installation hole and is connected at one end with the first spring, the first insertion cylinder which is in the structure of circular truncated cone and is connected at the larger diameter end with the end of the sliding cylinder which is away from the first spring, and the rolling ball which is rollingly embedded in the smaller diameter end of the insertion cylinder.

[0012] Preferably, the hollow anchor rod body is provided with a second limiting hole at both ends, a connecting sleeve is installed between two adjacent hollow anchor rod bodies, the connecting sleeve is threadedly connected with two adjacent anchor rods at both ends, and a third elastic limiting piece with the same structure as the second elastic limiting piece is arranged on the side wall of the connecting sleeve at both ends.

[0013] Preferably, the first sleeve inner cavity is in an inverted conical structure.

[0014] Preferably, the hollow anchor rod body is threadedly connected with at least one centralizer, and the centralizer comprises a centralizing cylinder threadedly connected with the hollow anchor rod body and a plurality of T-shaped plates uniformly arranged on the outer side wall of the centralizing cylinder around the center of the centralizing cylinder.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1、The alloy drill bit and the hollow anchor rod body are not only fixed through thread connection but also limited through the limiting assembly, so that the rotation between the drill bit and the hollow anchor rod body in the drilling process is effectively avoided, the drill bit loosening and falling off in the drilling process is effectively avoided, the stability of the drill bit and the rod body connection is enhanced, the stability and reliability of the anchor rod in the drilling process are ensured, the grouting hole is arranged on the side wall of the hollow anchor rod body, the anchor rod can not only be grouted through the grouting hole of the drill bit but also be grouted through the grouting hole of the side wall of the anchor rod, so that the slurry can more comprehensively, quickly and uniformly fill the surrounding rock fissures, the grouting speed of the anchor rod is further accelerated, the overall compactness and strength of the rock mass are improved, and the grouting effect is improved.

[0017] 2、The first spring in the first elastic limiting piece provides elastic force, so that the first limiting piece can slide in the first mounting hole, when the alloy drill bit is connected with the first sleeve, the first limiting piece is extruded to slide into the first mounting hole, the first spring is compressed, when the alloy drill bit is downwardly rotated to align with the first limiting piece, the first spring rebounds to push the first limiting piece to insert into the first limiting hole, the relative rotation and axial movement of the alloy drill bit and the first sleeve are prevented, the relative movement of the hollow anchor rod body and the second sleeve is limited by the second elastic limiting piece, the stability of the connection between the drill bit and the hollow anchor rod body and the mounting cylinder is ensured, the loosening of the hollow anchor rod body and the drill bit in the drilling or grouting process is avoided, the anchor rod is more stable and reliable, can better adapt to complex geological conditions, and the ball can reduce the friction in the installation process, so that the installation process is smoother. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0019] Figure 1 It is a structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0020] Figure 2 It is a hollow anchor rod body structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0021] Figure 3 It is an installation cylinder structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0022] Figure 4 It is a connection sectional view of an installation cylinder, an alloy drill bit and a hollow anchor rod body of a self-advancing anchor rod with an alloy drill bit;

[0023] Figure 5 It is a first limiting piece structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0024] Figure 6 It is a connecting sleeve structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0025] Figure 7 It is a centralizer structural schematic diagram of a self-advancing anchor rod with an alloy drill bit;

[0026] The drawings show that: 1 is a hollow anchor rod body, 2 is an alloy drill bit, 3 is a grout stopper, 4 is a pad, 5 is a nut, 6 is an installation cylinder, 7 is a grouting hole, 8 is a first sleeve, 9 is a second sleeve, 10 is a first elastic limiting piece, 11 is a first limiting hole, 12 is a second elastic limiting piece, 13 is a second limiting hole, 14 is a first mounting hole, 15 is a first limiting piece, 16 is a first spring, 17 is a second mounting hole, 18 is a second spring, 19 is a first sliding cylinder, 20 is a first inserting cylinder, 21 is a ball, 22 is a connecting sleeve, 23 is a third elastic limiting piece, 24 is a centralizer, 25 is a centralizing cylinder, 26 is a T-shaped plate, 27 is a second limiting piece. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the utility model, it needs to be explained that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0030] In addition, if the terms "first", "second", "third" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, if the terms "horizontal", "vertical", "overhanging" and the like do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "setting", "mounting", "connecting", "connection" and the like appear, they should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] It needs to be explained that, in the case of no conflict, the features in the embodiments of the utility model can be combined with each other.

[0034] For example, Figures 1-2The utility model discloses a self-advancing anchor rod with alloy drill bit, including at least one both ends open hollow anchor rod body 1, the hollow alloy drill bit 2 of setting in hollow anchor rod body 1 front end, the stop plug 3 of setting in hollow anchor rod body 1 tail portion, pad 4 and nut 5 in proper order, one end with the screw connection of alloy drill bit 2, the other end with the screw connection of hollow anchor rod body 1, install cylinder 6, first limiting component is set between alloy drill bit 2 and install cylinder 6, second limiting component is set between hollow anchor rod body 1 and install cylinder 6, and several grouting holes 7 are evenly passed through and are set on the lateral wall of hollow anchor rod body 1.

[0035] Need to explain: the alloy drill bit 2 type can be selected according to actual geological conditions and construction demand, such as for soft rock and soil layer is optional three wings or four wings alloy drill bit 2, for the gravel of big pebble inclusions, when the fracture development rock layer can select optional cross alloy drill bit 2, the size of hollow anchor rod body 1 grouting hole 7 can be made according to actual situation, in the circumferential direction of hollow anchor rod body 1, grouting hole 7 should be evenly distributed, generally can set 3-4 grouting holes 7, in the axial direction of hollow anchor rod body 1, the axial spacing between grouting hole 7 close to the front end of hollow anchor rod body 1 (close to the end of drill bit) can be appropriately less than the axial spacing of the middle and tail grouting hole 7 of hollow anchor rod body 1, and the specific axial spacing can be made according to actual situation.

[0036] The utility model uses, first through install cylinder 6 with alloy drill bit 2 screw connection and through first limiting component with both limit, avoid its relative rotation, then hollow anchor rod body 1 with install cylinder 6 screw connection, and through second limiting component with both limit, avoid its relative rotation, further effectively avoided the drill bit loosening and falling off in the drilling process, enhanced the stability of drill bit and rod body connection, ensured the stability and reliability of anchor rod in the drilling process, after assembling, anchor rod is connected with external power device (such as drilling machine), and drilling machine provides power, output torque and axial thrust, makes alloy drill bit 2 rotate and drills into rock or soil, when drilling to the predetermined depth, installs stop plug 3 on the tail of hollow anchor rod body 1, then carries out grouting, and the hollow structure in the hollow anchor rod body 1 can directly as grouting channel and carries out grouting operation, and the grout is spouted through the grouting hole 7 on the lateral wall of hollow anchor rod body 1 and the grout outlet of alloy drill bit 2 and is bonded around the rock-soil body filling surrounding rock fissure, and the grout outlet makes the grout more comprehensive, fast and evenly fill the surrounding rock fissure, further speeds up the grouting speed of anchor rod, improves the overall density and strength of rock mass, improves the grouting effect, and after the grout solidification, pad 4 is installed on the exposed section of hollow anchor rod body 1 close to the rock-soil body surface, and the anchoring force of hollow anchor rod body 1 can be transmitted to pad 4 by applying pre-tightening force, and pad 4 is pressed to the rock surface, to prevent the deformation of rock mass, and then the corresponding nut 5 is fixed to transmit pressure.

[0037] In order to make the hollow anchor rod body 1 located in the center position of the drill hole, ensure that the anchor rod remains in the center state in the drill hole, and further improve the density and uniformity of grouting, as shown in Figure 1 and Figure 7 The hollow anchor rod body 1 is threadedly connected with at least one centering device 24, which includes a centering cylinder 25 threadedly connected with the hollow anchor rod body 1, and a plurality of T-shaped plates 26 uniformly arranged on the outer sidewall of the centering cylinder 25.

[0038] As shown in Figures 3-4 The mounting cylinder 6 includes a first sleeve 8 which is internally hollow and open at both ends, and has external threads on the outer sidewall which are adapted to the alloy drill connection end, and a second sleeve 9 which is internally hollow and open at both ends, and has internal threads on the inner sidewall which are adapted to the hollow anchor rod body 1, and the first sleeve 8 and the second sleeve 9 are coaxially connected.

[0039] The first sleeve 8 has a reverse conical structure in the inner cavity.

[0040] The first limiting assembly includes a first elastic limiting piece 10 arranged on the lower end sidewall of the first sleeve 8, and a first limiting hole 11 arranged on the connection end sidewall of the alloy drill bit 2 which is adapted to the first elastic limiting piece 10, and the second limiting assembly includes a second elastic limiting piece 12 arranged on the upper end sidewall of the second sleeve 9, and a second limiting hole 13 arranged on the end sidewall of the hollow anchor rod body 1 which is adapted to the second elastic limiting piece 12.

[0041] The first elastic limiting piece 10 includes a first mounting hole 14 which is transversely arranged on the lower end sidewall of the first sleeve 8 and has an opening facing outward, a first limiting piece 15 which is slidingly arranged in the first mounting hole 14, a first spring 16 which is connected at one end of the end portion of the first mounting hole 14 and connected at the other end with the first limiting piece 15, and the first limiting piece 15 is adapted to the first limiting hole 11, and the second elastic limiting piece 12 includes a second mounting hole 17 which is transversely arranged on the upper end sidewall of the second sleeve 9 and has an opening facing inward, a second limiting piece 27 which is slidingly arranged in the second mounting hole 17, and a second spring 18 which is connected at one end of the end portion of the second mounting hole 17 and connected at the other end with the second limiting piece 27, and the second limiting piece 27 is adapted to the second limiting hole 13.

[0042] As shown in Figure 5As shown, the first limiting part 15 and the second limiting part 27 have the same structure, the first limiting part 15 comprises: a first sliding cylinder 19 slidingly arranged in the first mounting hole 14, one end of which is connected with the first spring 16, a first inserting cylinder 20 in the shape of a circular truncated cone, the larger diameter end of which is connected with the end of the sliding cylinder away from the first spring 16, and a rolling ball 21 rollingly embedded in the smaller diameter end of the inserting cylinder.

[0043] During the installation of the mounting cylinder 6 and the alloy drill bit 2, the first spring 16 in the first elastic limiting part 10 provides elastic force, so that the first limiting part 15 can slide in the first mounting hole 14, when the alloy drill bit 2 is connected with the first sleeve 8, the first limiting part 15 is pressed to slide into the first mounting hole 14, and the first spring 16 is compressed, when the alloy drill bit 2 is rotated downward to align with the first limiting part 15, the first spring 16 rebounds to push the first limiting part 15 to insert into the first limiting hole 11, thereby preventing the relative rotation and axial movement of the alloy drill bit 2 and the first sleeve 8, during the installation of the mounting cylinder 6 and the hollow anchor rod body 1, the second elastic limiting part 12 limits the relative movement of the hollow anchor rod body 1 and the second sleeve 9, ensuring the stability of the connection of the drill bit and the hollow anchor rod body 1 with the mounting cylinder 6, avoiding the loosening of the hollow anchor rod body 1 and the drill bit during the drilling or grouting process, making the anchor rod more stable and reliable as a whole, and better adapting to complex geological conditions, and the rolling ball 21 can reduce the frictional force during the installation process, making the installation process smoother.

[0044] As shown in Figure 1 and Figure 6 , the hollow anchor rod body 1 is provided with a second limiting hole 13 at both ends, and a connecting sleeve 22 is installed between two adjacent hollow anchor rod bodies 1, the connecting sleeve 22 is threadedly connected with two adjacent anchor rods at both ends, and the third elastic limiting part 23 with the same structure as the second elastic limiting part 12 is arranged on the side wall of both ends of the connecting sleeve 22.

[0045] The connecting sleeve 22 is threadedly connected with the adjacent hollow anchor rod body 1 at both ends, providing basic mechanical connection strength, and the third elastic limiting part 23 at both ends of the connecting sleeve 22 automatically pops out under the action of the spring, embeds into the second limiting hole 13 at the end of the hollow anchor rod body, and forms a "thread + limiting" double anti-loosening structure, when vibration or axial force occurs during the drilling or grouting of the anchor rod, the third elastic limiting part 23 is always located in the limiting hole 13, preventing the relative rotation or axial displacement between the connecting sleeve 22 and the hollow anchor rod body 1, and ensuring the stability and reliability of the anchor rod during drilling.

[0046] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited to Although the present application has been described by referring to the preferred embodiments of the present application, it should be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the present application defined by the appended claims.

Claims

1. A self-advancing anchor rod with a band alloy drill bit, comprising at least one hollow anchor rod body (1) with open ends, a hollow alloy drill bit (2) arranged at the front end of the hollow anchor rod body (1), and a grout stopper (3), a backing plate (4) and a nut (5) arranged in sequence at the tail of the hollow anchor rod body (1), characterized in that: Also include an end with the alloy drill bit (2) thread connection, the other end with the hollow anchor rod body (1) thread connection installation cylinder (6), set between the alloy drill bit (2) and the installation cylinder (6) first limiting component, set between the hollow anchor rod body (1) and the installation cylinder (6) second limiting component, and evenly through the setting on the hollow anchor rod body (1) side wall of several grouting hole (7); The installation cylinder (6) includes: the inside hollow two end opening, and the outside wall is equipped with the outer thread matched with the alloy drill connection end first sleeve (8), and the inside hollow two end opening, and the inside wall is equipped with the inner thread matched with the hollow anchor rod body (1) second sleeve (9), the first sleeve (8) and second sleeve (9) coaxial connection; The first limiting component includes: the first elastic limiting piece (10) arranged on the lower end side wall of the first sleeve (8), and the first limiting hole (11) arranged on the connecting end side wall of the alloy drill bit (2) matched with the first elastic limiting piece (10), and the second limiting component includes: the second elastic limiting piece (12) arranged on the upper end side wall of the second sleeve (9), and the second limiting hole (13) arranged on the end side wall of the hollow anchor rod body (1) matched with the second elastic limiting piece (12).

2. A self-advancing rock bolt with a band alloy drill bit according to claim 1, characterized in that: The first elastic limiting piece (10) includes: the first installation hole (14) transversely arranged on the lower end side wall of the first sleeve (8) with the opening outward, the first limiting piece (15) slidingly arranged in the first installation hole (14), the first spring (16) connected at one end of the first installation hole (14) end and the other end connected with the first limiting piece (15), the first limiting piece (15) matched with the first limiting hole (11), the second elastic limiting piece (12) includes: the second installation hole (17) transversely arranged on the upper end side wall of the second sleeve (9) with the opening inward, the second limiting piece (27) slidingly arranged in the second installation hole (17), the second spring (18) connected at one end of the second installation hole (17) end and the other end connected with the second limiting piece (27), the second limiting piece (27) matched with the second limiting hole (13).

3. A self-advancing rock bolt with a band alloy bit according to claim 2, characterized in that: The first limiting piece (15) and the second limiting piece (27) are the same structure, the first limiting piece (15) includes: the first sliding cylinder (19) slidingly arranged in the first installation hole (14), connected at one end with the first spring (16), the first insertion cylinder (20) with circular truncated cone structure, connected at the larger diameter end with the sliding cylinder away from the first spring (16) end, and the rolling ball (21) rollingly embedded in the smaller diameter end of the insertion cylinder.

4. A self-advancing rock bolt with a band alloy bit according to claim 3, characterized in that: The hollow anchor rod body (1) is provided with second limiting holes (13) at both ends, two adjacent hollow anchor rod bodies (1) are provided with connecting sleeves (22), the connecting sleeves (22) are respectively connected with the threads of two adjacent anchor rods at both ends, and the two end sidewalls of the connecting sleeves (22) are provided with third elastic limiting members (23) which are the same as the second elastic limiting members (12) in structure.

5. The self-advancing anchor rod with alloyed bit of claim 1, wherein: The inner cavity of the first sleeve (8) is in an inverted conical structure.

6. A self-advancing rock bolt with a band alloy bit according to claim 1, characterized in that: The hollow anchor rod body (1) is provided with at least one centralizer (24) which is threadedly connected with the hollow anchor rod body (1), the centralizer (24) comprises a centralizing cylinder (25) which is threadedly connected with the hollow anchor rod body (1), and a plurality of T-shaped plates (26) which are uniformly arranged on the outer sidewall of the centralizing cylinder (25) and surround the center of the centralizing cylinder (25).

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