Rotary grouting adapter connected with down-hole hammer
By using a rotary grouting adapter connected to the down-the-hole hammer, drilling, grouting, and anchoring are integrated, solving the problem of drilling construction under geological conditions prone to borehole collapse in existing technologies, and improving construction efficiency and project quality.
Patent Information
- Application Number
- CN202520691239.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing down-the-hole hammers are difficult to use in drilling operations under geological conditions such as holes prone to collapse and fractured rock, which makes grouting and inserting steel anchor rods difficult, affecting project quality and schedule.
Design a rotary grouting adapter to connect a down-the-hole impactor. By connecting the core to the down-the-hole impactor and the self-drilling hollow anchor, drilling, grouting and anchoring are integrated. Gas channels and grouting channels are used for venting and grouting respectively, ensuring that grouting can be performed while drilling.
It enables efficient drilling in geological conditions such as easily collapsed boreholes and fractured rock, ensuring drilling quality and construction efficiency, avoiding borehole collapse problems, and meeting anchoring requirements.
Smart Images
Figure CN223881126U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to civil engineering equipment technical field, specifically relates to a kind of rotary grouting adapter connected to down-the-hole hammer. BACKGROUND
[0002] The current commonly used down-the-hole hammer construction scheme is to install a drill bit at the front end of the down-the-hole hammer, and to form a borehole by impacting the drill bit at the front end through the impact of the down-the-hole hammer during drilling. The depth of the borehole is extended by connecting a drill rod to the rear end of the down-the-hole hammer. When the borehole reaches the designed depth, the drill rod (including the down-the-hole hammer and the drill bit) is withdrawn, and then an anchoring body such as a steel anchor rod is inserted into the borehole, and a grouting pipe is inserted to fill the cement slurry, completing the anchoring construction process. However, the existing down-the-hole hammer construction process has the following disadvantages: when drilling in geological conditions where the borehole is prone to collapse and the rock soil is difficult to form a hole, the down-the-hole hammer is prone to being stuck in the hole. After the drilling is completed and the drill rod is withdrawn, the borehole is prone to collapse, making it difficult to insert the steel anchor rod and grout, thereby failing to complete the anchoring in geological conditions where the borehole is prone to collapse and the rock soil is difficult to form a hole, and further affecting the engineering quality and causing delays in the construction period.
[0003] To solve the above problems, a self-drilling anchor rod is provided, which integrates drilling, grouting, and anchoring functions. The self-drilling anchor rod is mainly composed of a rod body, a drill bit, a connecting sleeve, a centralizer, a pad, and a nut. The self-drilling anchor rod is suitable for use in broken, difficult-to-form-hole, and easy-to-collapse-hole strata. It does not require a casing for wall protection during construction, significantly improving the construction efficiency, and can replace traditional anchor rods for support. It has the characteristics of reliability and simplicity, and is widely used in advanced support, radial support, slope reinforcement, roadbed reinforcement, and underground engineering remediation. However, due to the construction method of the self-drilling anchor rod, the existing down-the-hole hammer construction scheme cannot be applied, and the efficient process of drilling and grouting simultaneously during the drilling process of the self-drilling anchor rod cannot be achieved.
[0004] Therefore, the utility model patent is proposed. UTILITY MODEL CONTENT
[0005] To solve the above technical problems, the utility model provides a rotary grouting adapter connected to a down-the-hole hammer, specifically adopting the following technical solutions:
[0006] A rotary grouting adapter connected to a down-the-hole hammer, comprising:
[0007] A connecting core is connected to the down-the-hole hammer at the first end, and has a gas passage inside the first end that is in communication with the down-the-hole hammer. An exhaust hole is provided on the outer peripheral wall of the first end in communication with the gas passage. The second end of the connecting core is connected to the self-drilling hollow anchor rod, and has a grouting passage inside the second end that is in communication with the inside of the self-drilling hollow anchor rod.
[0008] A grouting sleeve is rotatably sleeved on the outer periphery of the second end of the connecting core body, and the grouting sleeve has a grouting chamber inside.
[0009] As an optional embodiment of the utility model, the first end of the connecting core body comprises a spline connection section, and the roof bolter is fixedly connected with the spline connection section.
[0010] As an optional embodiment of the utility model, the first end of the connecting core body comprises an annular shoulder section, which is located between the spline connection section and the second end of the connecting core body, and the diameter of the annular shoulder section is greater than the diameter of the spline connection section.
[0011] The gas channel sequentially penetrates the spline connection section and the annular shoulder section, and the opening of the gas channel is arranged at the free end of the spline connection section; the exhaust hole is arranged along the radial direction of the annular shoulder section, one end of the exhaust hole is communicated with the gas channel, and the other end of the exhaust hole is opened on the outer peripheral wall of the annular shoulder section.
[0012] As an optional embodiment of the utility model, a plurality of exhaust holes are distributed on the outer periphery of the annular shoulder section.
[0013] As an optional embodiment of the utility model, the second end of the connecting core body is provided with an anchor rod connecting threaded hole, and the grouting channel is communicated with the anchor rod connecting threaded hole.
[0014] As an optional embodiment of the utility model, the grouting chamber inside the grouting sleeve is an annular grouting chamber, the grouting hole of the grouting hole channel is arranged on the outer peripheral wall of the second end of the connecting core body, and the annular grouting chamber is arranged around the grouting hole of the grouting hole channel.
[0015] As an optional embodiment of the utility model, a rotary support body is arranged between the inner walls on both sides of the annular grouting chamber inside the grouting sleeve and the outer peripheral wall of the second end of the connecting core body.
[0016] As an optional embodiment of the utility model, end covers flanges are respectively arranged at the two ends of the grouting sleeve, and the rotary support body is encapsulated.
[0017] As an optional embodiment of the utility model, dynamic sealing rings are arranged between the inner walls between the annular grouting chamber and the rotary support body inside the grouting sleeve and the outer peripheral wall of the second end of the connecting core body.
[0018] As an optional embodiment of the utility model, the gas channel and the grouting channel are arranged on the same central axis.
[0019] Compared with the prior art, the utility model has the beneficial effects of
[0020] The utility model discloses a kind of rotary grouting adapters of connecting down-the-hole hammer, the second end of connecting core body is connected with self-drilling hollow anchor rod, realizes drilling, grouting, anchoring integrated function, the first end of connecting core body is connected with down-the-hole hammer, down-the-hole hammer is impacted in the process of self-drilling anchor rod drilling by external mode, first end has gas passage in communication with down-the-hole hammer inside, the exhaust hole of gas passage is set in the outer peripheral wall of first end, compressed air is discharged from exhaust hole (if there is no exhaust hole, down-the-hole hammer does not work) when down-the-hole hammer works.
[0021] Therefore, a kind of rotary grouting adapters of connecting down-the-hole hammer of the utility model, with the adaptive installation of self-drilling hollow anchor rod, down-the-hole hammer, grouting while drilling, impact in the process of self-drilling anchor rod drilling is simultaneously realized, realizes drilling, grouting, anchoring integrated function. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 The utility model embodiment a kind of rotary grouting adapters of connecting down-the-hole hammer stereoscopic structure schematic view;
[0023] Figure 2 The utility model embodiment a kind of rotary grouting adapters of connecting down-the-hole hammer plan view;
[0024] Figure 3 The utility model embodiment a kind of rotary grouting adapters of connecting down-the-hole hammer along Figure 2 Sectional view of middle G-G. DETAILED DESCRIPTION
[0025] To make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment.
[0026] Therefore, the detailed description of the embodiment of the utility model below is not intended to limit the scope of the claimed utility model, but only represents part of the embodiment of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of the utility model protection.
[0027] It should be noted that, in the case of no conflict, the embodiment in the utility model and the features and technical solutions in the embodiment can be combined with each other.
[0028] It should be noted that like numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it should not require further defining and explaining in subsequent views.
[0029] In the description of the utility model, it needs to explain, the term "upper", "lower" and so on indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawing, or is the orientation or position relationship of the utility model product when using commonly, or is the orientation or position relationship that the person skilled in the art commonly understands, these terms are only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate with a particular orientation, therefore, it can not be understood as the limitation of the utility model.In addition, the terms "first", "second" and so on are only used for distinguishing description, and can not be understood as indicating or implying relative importance.
[0030] Referring to Figures 1-3 The utility model discloses a kind of rotary grouting adapters of down-the-hole hammer, comprising:
[0031] Connecting core 100, the first end 100A of the connecting core 100 is connected with down-the-hole hammer (not shown), and the first end 100A has a gas passage 104 in communication with the down-the-hole hammer inside, and the outer peripheral wall of the first end 100A is provided with an exhaust hole 105 in communication with the gas passage 104, the second end 100B of the connecting core 100 is connected with self-drilling hollow anchor rod, and the second end 100B has a grouting passage 106 in communication with the inside of the self-drilling hollow anchor rod inside;
[0032] Grouting sleeve 200, the grouting sleeve 200 is rotatably sleeved on the outer periphery of the second end 100B of the connecting core 100, and the grouting sleeve 200 has a grouting chamber 202 inside, and the outer peripheral wall of the second end 100B of the connecting core 100 is provided with a grouting hole 107 in communication with the grouting passage 106 and the grouting chamber 202.
[0033] The utility model discloses a kind of rotary grouting adapters of down-the-hole hammer, the second end 100B of connecting core 100 is connected with self-drilling hollow anchor rod, realizes drilling, grouting, anchoring integration function, the first end 100A of the connecting core 100 is connected with down-the-hole hammer, and down-the-hole hammer is impacted in the drilling process of self-drilling anchor rod by external mode, the first end 100A has a gas passage 104 in communication with the down-the-hole hammer inside, and the outer peripheral wall of the first end 100A is provided with an exhaust hole 105 in communication with the gas passage 104, compressed air is discharged from the exhaust hole 105 when down-the-hole hammer works (if there is no exhaust hole 105, then down-the-hole hammer does not work).
[0034] Therefore, the rotary grouting adapter for connecting the down-the-hole impactor in this embodiment is adapted to the self-drilling hollow anchor bolt and the down-the-hole impactor for simultaneous drilling and grouting, thereby realizing the impact during the drilling process of the self-drilling anchor bolt and achieving the integrated function of drilling, grouting and anchoring.
[0035] As an optional implementation of this embodiment, the first end 100A of the connecting core 100 in this embodiment includes a spline connecting section 102, and the down-the-hole impactor is fixedly connected to the spline connecting section 102.
[0036] Further, in this embodiment, the first end 100A of the connecting core 100 includes an annular shoulder section 103, which is located between the spline connecting section 102 and the second end 100B of the connecting core 100. The diameter of the annular shoulder section 103 is larger than the diameter of the spline connecting section 102. The gas channel 104 passes through the spline connecting section 102 and the annular shoulder section 103 in sequence. The opening of the gas channel 104 is opened at the free end of the spline connecting section 102. The exhaust port 105 is arranged radially along the annular shoulder section 103, with one end communicating with the gas channel 104 and the other end opening on the outer peripheral wall of the annular shoulder section 103.
[0037] Optionally, in this embodiment, a plurality of exhaust channels 105 are distributed upward on the outer periphery of the annular shoulder section 103.
[0038] As an optional implementation of this embodiment, a rotary grouting adapter for connecting a down-the-hole hammer is provided. The second end 100B of the connecting core 100 is provided with an anchor bolt connection threaded hole 101, and the grouting channel 106 is connected to the anchor bolt connection threaded hole 101. This allows for the installation of self-drilling hollow anchor bolts. After installation, the self-drilling hollow anchor bolt is connected to the grouting channel 106, achieving integrated drilling, grouting, and anchoring functions for the self-drilling hollow anchor bolt.
[0039] Furthermore, in this embodiment, the grouting chamber 202 inside the grouting sleeve 200 is an annular grouting chamber, and the grouting hole of the grouting channel 107 is opened on the outer peripheral wall of the second end 100B of the connecting core 100. The annular grouting chamber is arranged around the grouting hole of the grouting channel 107.
[0040] Specifically, in this embodiment, a rotary support 203 is provided inside the grouting sleeve 200, between the inner walls on both sides of the annular grouting chamber 202 and the outer peripheral wall of the second end 100B of the connecting core 100. The rotary support 203 at both ends of the grouting sleeve 200 ensures that the grouting sleeve 200 remains fixed during the drilling process where the down-the-hole impactor rotates while impacting (the connecting core 100 rotates while impacting during drilling).
[0041] The rotary support body 203 of the present embodiment can be selected to use a rolling bearing, or a sliding bearing, or a metal sleeve, and by matching a lubricating substance, the rotary support body 203 can effectively support the connection core body 100 to stably rotate in the grouting sleeve body 200.
[0042] Further, the grouting sleeve body 200 of the present embodiment is provided with an end cover flange 204 at each end, which encapsulates the rotary support body 203 and functions to fix the rotary support body 203.
[0043] As an optional embodiment of the present embodiment, the inner wall of the grouting sleeve body 200 between the annular grouting chamber 202 and the rotary support body 203 is provided with a dynamic sealing ring 205 between the outer peripheral wall of the second end 100B of the connection core body 100, which functions to seal during grouting. Secondly, the rotary support body 203 ensures that the contact force of the dynamic sealing ring 205 with the connection core body 100 is always uniform, allowing the dynamic sealing ring 205 to wear uniformly and have a longer service life.
[0044] As an optional embodiment of the present embodiment, the grouting sleeve body 200 of the present embodiment is provided with a grouting joint 201, which has a hollow passage inside and is connected to the grouting passage 106. The grouting joint 201 is connected to a grouting pipe, and the slurry enters the grouting chamber 202 formed by the grouting sleeve 200 and the connection core body 100 through the grouting joint 201, then enters the hollow hole of the self-drilling anchor rod through the grouting hole 107 and the grouting passage 106 on the connection core body 100, and then returns to the grouting hole of the drill bit at the head of the self-drilling anchor rod.
[0045] The rotary grouting adapter for connecting a down-the-hole hammer of the present embodiment is provided with a gas passage 104 and a grouting passage 106 that share a common central axis.
[0046] The rotary grouting adapter for connecting a down-the-hole hammer of the present embodiment has the following characteristics:
[0047] 1. The gas passage 104, the exhaust hole 105, the grouting passage 106, and the grouting hole 107 are designed as two independent passages, which correspond to the exhaust of the down-the-hole hammer and the grouting of the self-drilling hollow anchor rod, respectively, and realize the function of drilling and grouting simultaneously during drilling construction with the down-the-hole hammer.
[0048] 2. The design of the rotary support body 203 and the end cover flange 204 ensures that the dynamic sealing ring 205 is uniformly stressed in contact with the connection core body 100, greatly prolonging the service life of the dynamic sealing ring 205.
[0049] The above examples are only used to illustrate the technical solutions described in the utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the above-described various embodiments, the utility model is not limited to the above-described specific embodiments, and therefore any modification or equivalent replacement of the utility model is allowed. Any technical solution and improvement that does not deviate from the spirit and scope of the utility model is encompassed in the scope of the claims of the utility model.
Claims
1. A rotary grout adapter for connecting a percussive rock drill, characterized in that The utility model relates to a connecting core, the first end of the connecting core is connected with a down-the-hole hammer, the first end has a gas passage in communication with the down-the-hole hammer, and a gas discharge channel is formed in the outer wall of the first end in communication with the gas passage; the second end of the connecting core is connected with a self-drilling hollow anchor rod, and the second end has a grouting passage in communication with the inside of the self-drilling hollow anchor rod. A grouting sleeve is rotatably sleeved on the outer periphery of the second end of the connecting core, and the grouting sleeve has a grouting chamber in the inside thereof; the outer wall of the second end of the connecting core is provided with a grouting hole in communication with the grouting passage and the grouting chamber. The first end of the connecting core comprises a spline connection section, and the down-the-hole hammer is fixedly connected with the spline connection section.
2. A rotary grout adapter for connecting a down-the-hole hammer according to claim 1, characterized in that The first end of the connecting core comprises an annular shoulder section between the spline connection section and the second end of the connecting core, and the diameter of the annular shoulder section is larger than that of the spline connection section.
3. A rotary grout adapter for connecting a down-the-hole hammer according to claim 2, characterized in that The gas passage sequentially penetrates the spline connection section and the annular shoulder section, and the opening of the gas passage is formed at the free end of the spline connection section; the gas discharge channel is arranged along the radial direction of the annular shoulder section, one end of the gas discharge channel is in communication with the gas passage, and the other end of the gas discharge channel is opened on the outer wall of the annular shoulder section. The outer periphery of the annular shoulder section is provided with a plurality of gas discharge channels.
4. A rotary grout adapter for connecting a down-the-hole hammer according to claim 3, characterized in that The second end of the connecting core is provided with an anchor rod connecting threaded hole, and the grouting passage is in communication with the anchor rod connecting threaded hole.
5. A rotary grout adapter for connecting a down-the-hole hammer according to claim 1, characterized in that The grouting chamber in the inside of the grouting sleeve is an annular grouting chamber, the grouting hole of the grouting hole channel is formed on the outer wall of the second end of the connecting core, and the annular grouting chamber surrounds the grouting hole of the grouting hole channel.
6. A rotary grout adapter for connecting a down-the-hole hammer according to claim 5, characterized in that Rotary support bodies are arranged between the inner walls on both sides of the annular grouting chamber in the grouting sleeve and the outer wall of the second end of the connecting core.
7. A rotary grout adapter for connecting a down-the-hole hammer according to claim 6, characterized in that End covers are respectively arranged at both ends of the grouting sleeve to encapsulate the rotary support bodies.
8. A rotary grout adapter for connecting a down-the-hole hammer according to claim 7, characterized in that Dynamic sealing rings are arranged between the inner walls between the annular grouting chamber and the rotary support bodies in the grouting sleeve and the outer wall of the second end of the connecting core.
9. A rotary grout adapter for connecting a down-the-hole hammer according to claim 7, characterized in that The gas passage and the grouting passage are arranged on the same central axis.
10. A rotary grout adapter for connecting a down-the-hole hammer according to claim 1, characterized in that