Drilling and grouting integrated anti-backflow grouting drill bit

Abstract

The utility model provides a drilling and grouting integrated anti-backflow grouting drill bit, and belongs to the technical field of buildings. The connecting sleeve is detachably fixed to the end of the drill rod, and a grouting channel used for slurry circulation is further formed in the connecting sleeve; the drill bit is fixed to the connecting sleeve, and the drill rod can drive the drill bit to rotate through the connecting sleeve; the rubber pad is fixed in the connecting sleeve, a plurality of deformation parts capable of bending downwards are arranged on the rubber pad, a through hole can be formed in the rubber pad when the deformation parts deform, and slurry can penetrate through the rubber pad through the through hole; the holder is fixed in the connecting sleeve and located above the rubber pad, a plurality of sets of positioning parts are arranged on the holder, and the deformation parts can be prevented from bending and deforming towards the drill rod through the positioning parts; a one-way valve effect can be formed through the rubber pad and the retainer, so that grout can be prevented from being back-flushed into a drill rod when the grouting drill bit works.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building equipment, specifically relates to a drilling and grouting integrated backflow prevention grouting drill bit. BACKGROUND

[0002] In the maintenance and management of the operation tunnel, the treatment of diseases such as seepage water and displacement deformation is a crucial task. If these diseases are not treated in time, they will gradually expand and pose a serious threat to the structural safety of the tunnel. The traditional treatment method is to use a drilling and grouting integrated device for grouting operation, but there are a series of problems to be solved in the actual operation process.

[0003] Firstly, the drill bit of the traditional drilling and grouting integrated device is often designed to be complex and not easy to disassemble. This not only increases the construction difficulty, but also affects the construction efficiency. In emergency or large-scale disease treatment tasks, the quick assembly and disassembly of the drill bit has become an urgent need.

[0004] Secondly, the phenomenon of slurry backflow blocking the drill pipe often occurs during grouting. This is mainly caused by unreasonable design of the grouting pipeline or lack of effective backflow prevention mechanism. Slurry backflow not only causes the interruption of grouting, but also requires frequent dredging of the drill pipe, which seriously affects the construction progress and quality.

[0005] In addition, with the rapid development of national transportation construction, the number of operation tunnels is increasing, and the structural disease treatment task is becoming increasingly heavy. How to efficiently and quickly complete the disease treatment under the premise of safety has become a problem to be solved. The traditional drilling and grouting integrated device often appears to be inadequate when faced with large-scale disease treatment. INVENTION CONTENTS

[0006] Therefore, the utility model provides a drilling and grouting integrated backflow prevention grouting drill bit, which can form a one-way valve effect through the rubber pad and the retainer, thereby avoiding the backflow of slurry into the drill pipe during the operation of the grouting drill bit.

[0007] To solve the above technical problems, the utility model provides a drilling and grouting integrated backflow prevention grouting drill bit, which comprises;

[0008] The connecting sleeve is detachably fixed at the end of the drill pipe, and the connecting sleeve is also provided with a grouting channel for slurry flow, and the slurry in the drill pipe can be injected into the grouting channel;

[0009] The drill bit is fixed on the connecting sleeve, and the drill pipe can drive the drill bit to rotate through the connecting sleeve;

[0010] The rubber pad is fixed in the connecting sleeve, and a plurality of deformation portions capable of bending downward are arranged on the rubber pad, the deformation portions are deformed to form perforations on the rubber pad, and the slurry can pass through the rubber pad through the perforations, and the slurry can be indirectly grouted after passing through the rubber pad.

[0011] The retainer is fixed in the connecting sleeve and located above the rubber pad, a plurality of positioning portions are arranged on the retainer, the deformation portions are prevented from bending and deforming toward the drill rod through the positioning portions, and the rubber pad forms an effect similar to a one-way valve through the limiting of the retainer.

[0012] Each deformation portion has at least two cut grooves arranged through the rubber pad, the end portions of each two adjacent cut grooves are connected together, and the included angle between each two adjacent cut grooves is less than 180°.

[0013] The positioning portion includes a plurality of positioning strips, the number of the positioning strips is consistent with the number of the cut grooves, the positioning strips are arranged along the cut groove, and the positioning strips limit the deformation portions above the cut grooves.

[0014] Four cut grooves are arranged through the rubber pad, the end portions of the four cut grooves are connected together to form a cross-shaped structure, and four deformation portions with right angles are formed.

[0015] The positioning portion is four positioning strips arranged in the inner ring of the retainer, the four positioning strips are located above the four cut grooves and the end portions of the four positioning strips are connected together to form a cross-shaped structure, and the four positioning strips cover the four cut grooves to prevent the deformation portions from bending toward the drill rod.

[0016] The connecting sleeve is fixed on the drill rod through threaded connection, and the connecting sleeve can be removed from the drill rod.

[0017] The connecting sleeve is composed of an upper sleeve and a lower sleeve, the upper sleeve is fixed on the drill rod through threaded connection, and the drill bit is fixed on the lower sleeve.

[0018] The bottom of the upper sleeve is also provided with a threaded hole, the rubber pad and the retainer are located in the threaded hole, and the upper surface of the lower sleeve is provided with external threads corresponding to the threaded hole.

[0019] A plurality of grouting holes are arranged on the lower sleeve, the grouting holes are connected with the grouting channels, and the slurry in the grouting channels can be grouted through the grouting holes.

[0020] Compared with the prior art, the application has at least one of the following beneficial technical effects:

[0021] 1. Simplified structure, easy to disassemble: the grouting drill bit of the utility model is detachably fixed at the end of the drill rod through the connecting sleeve. This design allows the drill bit to be quickly and conveniently removed or replaced from the drill rod when needed, greatly simplifying the construction process and improving the construction efficiency. Especially in emergency or large-scale disease treatment tasks, the quick installation and disassembly of the drill bit becomes a significant advantage.

[0022] 2. Prevents slurry backflow and ensures construction quality: the rubber pad in the grouting drill bit cooperates with the retainer to form a one-way valve effect. The deformation part on the rubber pad can bend downward to form a perforation under the action of slurry pressure, allowing slurry to pass. The positioning part on the retainer effectively limits the bending of the deformation part in the direction of the drill rod, thereby avoiding the backflow of slurry during grouting. This design not only reduces the risk of slurry clogging the drill rod, but also ensures the continuity and stability of the grouting operation, improving the construction quality.

[0023] 3. Enhances applicability and adapts to various grouting needs: the cut groove and deformation part on the rubber pad are designed to be flexible and variable, allowing the number, shape, and layout of the cut groove to be adjusted according to actual needs to adapt to different grouting pressures and grouting volumes. At the same time, the structure of the connecting sleeve composed of the upper sleeve and the lower sleeve also facilitates adjustment and adaptation according to different drill rod specifications, enhancing the versatility and applicability of the grouting drill bit.

[0024] 4. Improves grouting efficiency and reduces maintenance costs: due to the simple structure, easy disassembly, and maintenance of the grouting drill bit of the utility model, downtime caused by equipment failure during grouting can be reduced. At the same time, the implementation of the one-way valve effect also avoids the need for frequent dredging of the drill rod, further improving grouting efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the utility model one-drill grouting drill bit;

[0026] Figure 2 is a structural schematic view of the utility model explosion diagram;

[0027] Figure 3 is a structural schematic view of the utility model connecting sleeve cross-sectional view.

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 100, connecting sleeve; 101, upper sleeve; 102, lower sleeve; 103, grouting channel; 104, threaded hole; 105, grouting hole;

[0030] 200, drill bit;

[0031] 300, rubber pad; 301, cut groove;

[0032] 400, retainer; 401, positioning bar. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings of the embodiments of the present application to make a clear and complete description of the technical scheme of the embodiments of the present application. Figures 1-3 It is obvious that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0034] A drilling and injecting integrated anti-backflow grouting drill bit 200, as shown in Figure 1 , 2 includes a connecting sleeve 100 detachably connected to the end of the drill pipe, a grouting channel 103 is provided through the connecting sleeve 100, and the connecting sleeve 100 is further provided with a drill bit 200 at the end away from the drill pipe, so that the drill bit 200 can drive the drill bit 200 to rotate when rotating, and the connecting sleeve 100 is further provided with a plurality of grouting holes 105, the grouting holes 105 are in communication with the grouting channel 103, and the slurry in the drill pipe can enter the grouting channel 103 and be grouted through the grouting holes 105.

[0035] Specifically, the connecting sleeve 100 is fixed at the bottom of the drill pipe by thread cooperation, which facilitates the disassembly of the connecting sleeve 100, and thus the drill bit 200 or the connecting sleeve 100 can be maintained or replaced.

[0036] It is worth mentioning that the connecting sleeve 100 is further provided with a rubber pad 300 and a retainer 400, as shown in Figure 2 The rubber pad 300 is a circular plate structure and is provided with four cut grooves 301, and the four cut grooves 301 are connected together in a cross-shaped structure, so as to form four deformation portions with right-angle taper portions, and the deformation portions can be deformed on the rubber pad 300, so that the deformation portions can form four perforations on the rubber pad 300 when deformed, and the slurry can pass through the rubber pad 300 through the perforations, and the rubber pad 300 is located above the grouting holes 105, so that the slurry passing through the rubber pad 300 will finally be discharged through the grouting holes 105.

[0037] Correspondingly, the retainer 400 includes a circular ring frame, as shown in Figure 2As shown: the frame is provided with positioning parts, when the four cutting grooves 301 are cross-shaped structures, the positioning parts are four positioning strips 401, the four positioning strips 401 are connected in cross-shaped structures, and each positioning strip 401 covers the cutting groove 301, so that the retainer 400 can limit the deformation part on the rubber pad 300, so that the deformation part can be effectively prevented from bending to the drill rod, so that the rubber pad 300 and the retainer 400 can form an effect similar to a one-way valve, and compared with the one-way valve, the rubber pad 300 and the retainer 400 are simple in structure, convenient to manufacture and produce, and convenient to replace.

[0038] It is worth mentioning that the connecting sleeve 100 is composed of the upper sleeve 101 and the lower sleeve 102 in a split type design, as shown in the figure. Figure 3 As shown: the upper sleeve 101 is provided with a threaded hole 104 at the bottom, the threaded hole 104 is in communication with the grouting channel 103, and the outer wall surface of the top of the lower sleeve 102 is also provided with external threads, so that the lower sleeve 102 can be installed at the bottom of the upper sleeve 101 through threaded cooperation to form the connecting sleeve 100.

[0039] Specifically, the rubber pad 300 and the retainer 400 are located in the threaded hole 104, so that the lower sleeve 102 can fix the rubber pad 300 and the retainer 400 in the threaded hole 104 during installation, so that the rubber pad 300 and the retainer 400 cannot move up and down when the slurry flows, and the rubber pad 300 or the retainer 400 can be replaced separately by removing the lower sleeve 102.

[0040] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A drilling and grouting integrated anti-backflow grouting drill bit, characterized in that: include; A connecting sleeve (100) is detachably fixed to the end of the drill rod, and the connecting sleeve (100) is also provided with a grouting channel (103) for grout flow. The drill bit (200) is fixed on the connecting sleeve (100), and the drill rod can drive the drill bit (200) to rotate through the connecting sleeve (100); A rubber pad (300) is fixed inside the connecting sleeve (100), and the rubber pad (300) has several deformable parts that can be bent downwards. When the deformable parts are deformed, they can form perforations in the rubber pad (300), and the slurry can pass through the perforations through the rubber pad (300). The retainer (400) is fixed inside the connecting sleeve (100) and located above the rubber pad (300). The retainer (400) is provided with several sets of positioning parts, which can prevent the deformable part from bending and deforming towards the drill pipe.

2. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 1, characterized in that: Each of the deformable parts has at least two through-cut grooves (301) disposed on the rubber pad (300), the ends of every two adjacent grooves (301) are connected together, and the included angle between every two adjacent grooves (301) is less than 180°.

3. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 2, characterized in that: The positioning part includes a plurality of positioning strips (401), the number of positioning strips (401) is the same as the number of grooves (301), and the positioning strips (401) are arranged along the direction of the grooves (301).

4. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 2, characterized in that: The rubber pad (300) has four through-cut grooves (301), the ends of the four grooves (301) are connected together to form a cross-shaped structure, and can form four deformable parts with right angles.

5. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 4, characterized in that: The positioning part consists of four positioning strips (401) arranged in the inner ring of the retainer (400). The four positioning strips (401) are located above the four slots (301) and their ends are connected together to form a cross-shaped structure.

6. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 1, characterized in that: The connecting sleeve (100) is fixed to the drill rod by a threaded connection.

7. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 1, characterized in that: The connecting sleeve (100) consists of an upper sleeve (101) and a lower sleeve (102). The upper sleeve (101) is fixed to the drill rod by a threaded connection, and the drill bit (200) is fixed on the lower sleeve (102). The bottom of the upper sleeve (101) is also provided with a threaded hole (104), the rubber pad (300) and the retainer (400) are located in the threaded hole (104), and the upper surface of the lower sleeve (102) is provided with an external thread corresponding to the threaded hole (104).

8. The integrated drilling and grouting anti-backflow grouting drill bit (200) as described in claim 7, characterized in that: The lower sleeve (102) is also provided with a plurality of grouting holes (105), which are connected to the grouting channel (103).

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