Hydraulic reamer for horizontal anchor rod drilling

Abstract

The utility model belongs to the technical field of anchor rod drilling, and particularly relates to a hydraulic reamer for horizontal anchor rod drilling, which comprises a rod body used for being inserted into a drill hole, a flow channel is arranged in the rod body, one end of the flow channel inserted into the drill hole is closed, and the other end is communicated with a high-pressure water pump. The rod body is sleeved with a plurality of sets of elastic ring sleeves at intervals in the axial direction of the rod body, the two ends of each elastic ring sleeve and the outer wall face of the rod body are sealed so that a sealed interlayer can be formed between the outer wall face of the rod body and the inner wall face of each elastic ring sleeve, and a plurality of sets of water outlet holes in one-to-one correspondence with the elastic ring sleeves are formed in the rod body. And the flow channels are communicated with an interlayer formed between the corresponding elastic ring sleeve and the rod body through the water outlet holes. Water in the flow channel is pressurized, so that the elastic ring sleeve expands to extrude a soil body on the side wall of a drilled hole so as to form a string-bead-shaped anchor hole, the purpose of improving anchoring force is achieved, meanwhile, the anchor hole can be formed without deslagging work in the using process, using is convenient, the hole expanding efficiency is high, and the effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of anchor rod drilling, and particularly relates to a hydraulic hole expander for horizontal anchor rod drilling. Background Art

[0002] The construction of anchor rod drilling is a commonly used reinforcement technology in civil engineering, mainly used in scenarios such as foundation pit support, tunnel engineering, and slope stability. The expansion or diameter change of the drilled hole of the anchor rod refers to the process of expanding the diameter of the drilled hole through specific methods during the construction of the anchor rod to enhance the bearing capacity and stability of the anchor rod, which is beneficial to improving the anchoring force.

[0003] The utility model patent with the publication number of CN222782602U discloses a hole expanding drill. Although the proposed solution is applicable to the cable anchor reinforcement and foundation reinforcement work in soft strata, soil layers, strongly weathered strata, etc., the following defects still exist in its solution: After the hole is expanded by the drill, a special slag cleaning tool is required for slag cleaning, the operation is cumbersome, and the efficiency of the hole expanding construction is reduced; at the same time, there may be a problem that the slag cannot be cleaned cleanly, resulting in residual slag reducing the anchoring force and affecting the hole expanding effect. Content of the Utility Model

[0004] In order to solve the problems of the existing technology, the utility model proposes a hydraulic hole expander for horizontal anchor rod drilling, which solves the problems of inconvenient slag cleaning, low efficiency, and unclean slag cleaning affecting the anchoring force during the current hole expanding construction.

[0005] The purpose of the utility model and the solution to its technical problems are achieved by adopting the following technical solutions. A hydraulic hole expander for horizontal anchor rod drilling proposed according to the utility model includes a rod body for inserting into the drilled hole. A flow channel is provided inside the rod body. One end of the flow channel inserted into the drilled hole is closed, and the other end is connected to a high-pressure water pump; along the axial direction of the rod body, a plurality of groups of elastic ring sleeves are sleeved at intervals, and both ends of the elastic ring sleeve are sealed with the outer wall surface of the rod body so that a sealed sandwich layer is formed between the outer wall surface of the rod body and the inner wall surface of the elastic ring sleeve. The rod body is provided with a plurality of groups of water outlet holes corresponding to the elastic ring sleeves one by one, and the flow channel is communicated with the sandwich layer formed between the corresponding elastic ring sleeve and the rod body through the water outlet holes.

[0006] [[ID=2,2]]Further, the rod body is a cylindrical rod.

[0007] Further, both ends of the elastic ring sleeve are fixed on the outer wall of the rod body through clamps, and the both ends of the elastic ring sleeve are sealed with the outer wall of the rod body by the pressing force of the clamps.

[0008] Further, each group of water outlet holes has two, which are distributed along the circumferential direction of the rod body and are symmetrically arranged about the axis of the rod body.

[0009] Further, a plurality of groups of elastic ring sleeves are evenly distributed at intervals.

[0010] Furthermore, the rod body, the flow channel, and the drilling hole are coaxially arranged.

[0011] In summary, in the present utility model, through the mutually cooperating high-pressure water pump, flow channel, water outlet, and the elastic ring sleeve sealed on the outer wall of the rod body, by pressurizing the water in the flow channel, the elastic ring sleeve is expanded to squeeze the soil on the side wall of the drilling hole to form beaded anchor holes, so as to achieve the purpose of improving the anchoring force. At the same time, during use, the anchor holes can be formed without the need for slag discharge work, which is convenient to use, and has high reaming efficiency and good effect.

[0012] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, is described in detail as follows. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of a hydraulic reamer for horizontal anchor bolt drilling of the present utility model located in a drilling hole.

[0014] Figure 2 It is Figure 1 the cross-sectional view at A-A in

[0015] Figure 3 It is Figure 1 the cross-sectional view at B-B in

[0016] Figure 4 It is a schematic diagram of the hydraulic reamer for horizontal anchor bolt drilling of the present utility model performing reaming work in a drilling hole.

[0017] Figure 5 It is Figure 4 the cross-sectional view at C-C in

[0018] Wherein: 1. Rod body; 2. Drilling hole; 3. Clamp; 4. Elastic ring sleeve; 5. Water outlet hole. Detailed Embodiment

[0019] The following further describes the technical solution of the present utility model in conjunction with the drawings and preferred embodiments.

[0020] Please refer to Figures 1-3 , a hydraulic reamer for horizontal anchor bolt drilling, including a cylindrical rod body 1 for inserting into the drilling hole 2. A flow channel extending along its axial direction is provided in the rod body 1. One end of the flow channel close to the insertion end of the rod body 1 is closed, and the other end is communicated with a high-pressure water pump. When the rod body 1 is inserted into the drilling hole 2, there is a certain distance between its outer wall and the inner wall of the drilling hole 2. At the same time, the rod body 1, the drilling hole 2, and the flow channel are coaxially arranged.

[0021] A plurality of groups of elastic ring sleeves 4 are evenly sleeved on the outer wall of the rod body 1 at intervals along its axial direction. The elastic ring sleeves 4 are made of rubber material, that is, rubber ring sleeves. Both ends of the elastic ring sleeves 4 are pressed against the outer wall of the rod body 1 by clamps 3, and the inner wall surfaces of both ends of the elastic ring sleeves 4 are sealed with the outer wall surface of the rod body 1 through the pressing force of the clamps 3, so as to form a sealed sandwich layer between the outer wall surface of the rod body 1 and the inner wall surface of the elastic ring sleeves 4. A plurality of groups of water outlet holes 5 corresponding to the elastic ring sleeves 4 one by one are provided on the rod body 1. Each group of water outlet holes 5 has two, which are distributed along the circumferential direction of the rod body 1 and are symmetrically arranged about the axis of the rod body 1. The aforementioned flow channel is communicated with the sandwich layer formed between the corresponding elastic ring sleeve 4 and the rod body 1 through the water outlet holes 5, so that the liquid in the flow channel flows into the sandwich layer; Refer to Figures 4-5 , when the high-pressure liquid in the flow channel enters the sandwich layer, the high-pressure liquid will expand the elastic ring sleeve 4 to form an enlarged cavity contour with a circular cross-section. When the elastic ring sleeve 4 expands and squeezes the soil body, a wheel-shaped enlarged cavity is formed.

[0022] Working principle: During construction, first use a tool to process the drill hole 2. After the processing is completed, withdraw the drill hole tool, and then insert the rod body 1 into the predetermined position in the drill hole 2, and at the same time ensure that the rod body 1, the drill hole 2, and the flow channel are coaxially arranged to ensure that the extrusion force of each part of the liquid is relatively uniform;

[0023] Subsequently, open the connection to the high-pressure water pump and inject high-pressure water into the flow channel. The water flows into the sandwich layer through the water outlet holes 5, and at the same time expands the elastic ring sleeve 4 to squeeze the soil body on the inner wall of the drill hole 2. As the pressure increases, the soil body around the elastic ring sleeve 4 is squeezed and compacted to form an enlarged cavity. After the pressure reaches the preset value, keep the pressure for 5 minutes to make the structure of the enlarged cavity stable, and then close the high-pressure water pump to relieve the pressure of the water in the flow channel. At the same time, the elastic ring sleeve 4 returns to its original state, and then withdraw the rod body 1 from the drill hole 2, and the hole expansion is completed.

[0024] In other embodiments of the present invention, the elastic ring sleeve 4 (rubber ring sleeve) can be replaced with other elastic materials with better tensile properties, such as thermoplastic elastomer.

[0025] In other embodiments of the present invention, each group of water outlet holes 5 can be provided with a plurality of (more than two) along the circumferential direction of the rod body 1. As the number of water outlet holes 5 increases, the elastic ring sleeve 4 can be quickly expanded by the high-pressure liquid, thereby reducing the forming time of the enlarged cavity and improving the hole expansion efficiency; at the same time, each group of water outlet holes 5 needs to be evenly arranged along the circumferential direction of the rod body 1 to ensure that the extrusion forces received by each part of the elastic ring sleeve 4 are relatively uniform, so as to achieve the purpose of improving the service life of the elastic ring sleeve 4.

[0026] In other embodiments of the present utility model, the clamp 3 can be replaced with other fixing members that can fix the elastic ring sleeve 4 and seal the two ends of the elastic ring sleeve 4 to the surface of the rod body 1, such as other annular clamps, hose clamps, or hoop clamps, or the above object can be achieved directly by applying sealant to the inner walls of the two ends of the elastic ring sleeve 4, etc.

[0027] As described above, it is only the preferred embodiment of the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A hydraulic hole expander for horizontal anchor rod drilling, characterized in that: It includes a rod body (1) for inserting into a borehole (2). A flow channel is provided inside the rod body (1). One end of the flow channel is closed and the other end is connected to a high-pressure water pump. A number of groups of elastic ring sleeves (4) are sleeved on the rod body (1) at intervals along its axial direction. The inner wall surfaces at both ends of the elastic ring sleeve (4) are sealed with the outer wall surface of the rod body (1) so as to form a sealed sandwich layer between the outer wall surface of the rod body (1) and the inner wall surface of the elastic ring sleeve (4). A number of groups of water outlet holes (5) corresponding one by one to the elastic ring sleeves (4) are provided on the rod body (1). The flow channel is communicated with the sandwich layer formed between the corresponding elastic ring sleeve (4) and the rod body (1) through the water outlet holes (5).

2. The hydraulic reamer for horizontal anchor rod drilling according to claim 1, wherein: The rod body (1) is a cylindrical rod.

3. The hydraulic reamer for horizontal anchor rod drilling according to claim 1, wherein: Both ends of the elastic ring sleeve (4) are fixed on the outer wall of the rod body (1) by clamps (3), and the both ends of the elastic ring sleeve (4) are sealed with the outer wall of the rod body (1) by the pressing force of the clamps (3).

4. The hydraulic reamer for horizontal anchor drilling according to claim 1, characterized in that: Each group of water outlet holes (5) has two, which are distributed along the circumferential direction of the rod body (1) and are symmetrically arranged about the axis of the rod body (1).

5. The hydraulic reamer for horizontal anchor rod drilling according to claim 1, wherein: A number of groups of elastic ring sleeves (4) are evenly distributed at intervals.

6. The hydraulic reamer for horizontal anchor rod drilling according to claim 1, wherein: The rod body (1), the flow channel, and the borehole (2) are coaxially arranged.

7. A hydraulic hole expander for horizontal anchor rod drilling according to claim 1, characterized in that: The elastic ring sleeve (4) is made of rubber material.

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