Grouting device of drilling machine

Abstract

The grouting device of the drilling machine at least comprises a grouting anchor rod, a connecting device, a first connector and a sealing mechanism. A grouting channel is formed in the grouting anchor rod, and a grout inlet and a grout outlet which communicate with the grouting channel are formed in the two ends of the grouting anchor rod. One end of the connecting device is fixedly connected with the drilling machine body, and the other end of the connecting device sleeves the grouting anchor rod and is used for clamping and fixing the grouting anchor rod; the first connector is arranged on the grouting anchor rod in a sleeving mode and used for being connected with a preset piece located on the pipe piece. The sealing mechanism at least comprises a first sealing piece arranged on the grouting anchor rod in a sleeving mode and a connecting assembly fixedly connected with the connecting device, one end of the first sealing piece is fixedly connected with the connecting assembly, and the other end of the first sealing piece stretches into the position between the first connector and the grouting anchor rod to be tightly matched with the first connector and the grouting anchor rod. The grouting device of the drilling machine has the advantages that the sealing effect is good, and grout is not prone to leakage in the pipe piece grouting operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a drilling rig grouting device. Background Art

[0002] In tunnel construction, shield machine technology is widely used due to its efficient and accurate excavation capabilities. However, in soft geological conditions, after the shield machine completes the assembly of the tunnel segments, the geological conditions may pose a potential threat to construction safety. To address this issue, a series of reinforcement measures are needed to ensure the stability and safety of the tunnel structure. Specifically, after the shield machine completes the assembly of the tunnel segments in soft geology, the next key step is to reinforce the geology under the segments. This reinforcement process includes drilling holes, inserting grouting anchors, and performing pressure grouting.

[0003] like Figure 5 As shown, the pipe segment 6 is provided with a plurality of prefabricated holes 61, on which prefabricated parts 62 are mounted. The prefabricated parts include a second joint 621 fixedly connected to the pipe segment and a ball valve 622 connected to the second joint.

[0004] The drilling rig body 7 first aligns the drill arm with the prefabricated hole 61 through the rotary mechanism, and abuts the head 71 against the inner wall of the pipe segment 6, and connects the first joint 4 on the grouting device with the end of the ball valve 622 away from the second joint. Under the action of the grouting pressure, the slurry enters the prefabricated hole through the grouting port 12, the grouting channel 11 and the grouting port 13 of the grouting anchor 1 in sequence, thereby reinforcing the pipe segment 6.

[0005] There are some technical defects in the grouting mechanism of the prior art:

[0006] like Figure 6 As shown, the first seal 41 is sleeved on the grouting anchor rod 1 and one end is fixedly connected to the drilling rig body 7 through a connecting assembly 42, the first joint 3 is inserted into the first seal 41, and the outer surface of the first joint 41 is tightly matched with the inner cavity surface of the first seal. During the drilling rig grouting operation, due to the pressure grouting technology adopted, the inner cavity of the first seal 41 will deform under the action of the grouting pressure and expand radially outward. This expansion not only changes the original shape and structure of the first seal 41, but more importantly, it destroys the sealing of the connection between the first seal 41 and the first joint 3. Once the seal fails, the slurry will leak out from the connection. This leakage will not only greatly reduce the efficiency of the grouting operation, increase the difficulty and complexity of the construction, but also have a serious impact on the construction progress. More seriously, the leaked slurry will splash out at a very high speed under the action of high pressure. This splashing slurry poses a serious safety hazard to the workers at the construction site. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide a drilling rig grouting device which has good sealing effect and prevents slurry from leaking easily during the grouting operation of the pipe segment.

[0008] In order to solve the above technical problems, the utility model provides a technical solution, a drilling rig grouting device, at least comprising:

[0009] A grouting anchor rod, wherein a grouting channel is arranged inside the grouting anchor rod, and a grouting inlet and a grouting outlet connected to the grouting channel are arranged at both ends;

[0010] A connecting device, one end of which is fixedly connected to the drilling rig body, and the other end of which is sleeved on the grouting anchor rod for clamping and fixing the grouting anchor rod;

[0011] A first joint, which is sleeved on the grouting anchor rod and is used to connect a ball valve located on the pipe segment;

[0012] A sealing mechanism, wherein the sealing mechanism comprises at least a first sealing member sleeved on the grouting anchor rod and a connecting assembly fixedly connected to the connecting device, wherein one end of the first sealing member is fixedly connected to the connecting assembly, and the other end extends between the first joint and the grouting anchor rod and is tightly fitted with the first joint and the grouting anchor rod.

[0013] In a preferred embodiment, the connecting assembly includes an adapter plate, a second seal and a sealing plate which are sequentially sleeved on the grouting anchor rod, the upper end surface of the adapter plate is fixedly connected to the connecting device, the sealing plate is fixedly connected to the lower end surface of the adapter plate and the second seal is pressed against the lower end surface of the adapter plate.

[0014] In a preferred embodiment, the second sealing member and the grouting anchor are tightly fitted.

[0015] In a preferred embodiment, the adapter plate includes a mounting portion fixedly connected to the connecting device and a hollow sealing portion extending outward from an end surface of the mounting portion away from the connecting device, the sealing plate is fixedly connected to the sealing portion to form a sealing cavity, and the second sealing member is located in the sealing cavity.

[0016] In a preferred embodiment, a connecting pipe sleeved on the grouting anchor rod is fixedly connected to the side of the sealing plate away from the sealing cavity.

[0017] In a preferred embodiment, the first sealing member includes a clamping portion, a connecting portion and a transition portion located between the clamping portion and the connecting portion, the clamping portion is adapted to the connecting pipe, the first sealing member is fixedly connected to the sealing plate via the clamping portion and the connecting pipe, and the connecting portion is adapted to the first joint.

[0018] In a preferred embodiment, the sealing mechanism further comprises a clamping member, wherein the clamping member is sleeved on the clamping portion and presses the clamping portion against the outer surface of the connecting pipe.

[0019] In a preferred embodiment, a retaining ring is installed between the clamping portion and the connecting pipe.

[0020] In a preferred embodiment, the transition portion is arranged to be gradually tapered from the clamping portion to the connecting portion.

[0021] A preferred embodiment further includes a flushing mechanism, which includes a shell sleeved on the grouting anchor rod, a flushing cavity matching the outer surface of the grouting anchor rod is provided in the shell, and the shell is provided with a liquid inlet hole connected to the flushing cavity.

[0022] Compared with the prior art, the drilling rig grouting device of the utility model has the following beneficial effects:

[0023] (1) The drilling rig grouting device of the utility model at least includes a grouting anchor, a connecting device, a first joint and a sealing mechanism. The sealing mechanism at least includes a first seal sleeved on the grouting anchor and a connecting assembly fixedly connected to the connecting device. One end of the first seal is fixedly connected to the connecting assembly, and the other end extends between the first joint and the grouting anchor to tightly fit the first joint and the grouting anchor. With such a structural design, during the drilling rig grouting operation, pressure grouting technology is used, and the inner cavity of the first seal is deformed under the action of the grouting pressure and expands radially outward. This radial expansion increases the pressure on the contact surface between the first seal and the first joint, thereby making the first seal and the first joint press tightly, producing a better sealing effect and making the seal more reliable.

[0024] (2) The drilling rig grouting device of the utility model, the connecting assembly includes an adapter plate, a second seal and a sealing plate which are sequentially sleeved on the grouting anchor rod, the upper end surface of the adapter plate is fixedly connected to the connecting device, the sealing plate is fixedly connected to the lower end surface of the adapter plate and the second seal is pressed against the lower end surface of the adapter plate. The second seal and the grouting anchor rod are tightly fitted. During the pressure grouting operation, the grouting anchor rod needs to be inserted into the prefabricated hole of the pipe segment, and the grouting anchor rod moves axially relative to the first seal. During the axial movement of the grouting anchor rod, the inner cavity surface of the first seal is worn, and the inner cavity of the first seal is depressurized, resulting in slurry leakage along the axial direction of the grouting anchor rod. The second seal is sleeved on the grouting anchor rod and is tightly fitted with the grouting anchor rod. With such a structural design, when the inner cavity of the first seal is depressurized due to wear, the second seal acts as a second sealing protection to ensure that the slurry does not leak along the axial direction of the grouting anchor rod.

[0025] (3) The utility model provides a drilling rig grouting device, wherein the first sealing member includes a clamping portion, a connecting portion, and a transition portion located between the clamping portion and the connecting portion, the clamping portion is adapted to the connecting pipe, the connecting portion is adapted to the first joint, and the transition portion is tapered from the clamping portion to the connecting portion. With such a structural design, during the drilling rig grouting operation, pressure grouting technology is adopted, and under the action of the grouting pressure, the transition portion generates pressure perpendicular to the tapered surface due to the setting of the tapered structure, and the first sealing member is pressed against the first joint in the radial and axial directions, thereby generating a better sealing effect and making the seal more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a drilling rig grouting device of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a grouting anchor rod of a drilling rig grouting device embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of a connection assembly of a drilling rig grouting device embodiment of the utility model;

[0029] Figure 4 It is a schematic diagram of the assembly structure of a first sealing member and a connecting pipe of an embodiment of a drilling rig grouting device of the utility model;

[0030] Figure 5 It is a schematic diagram of the overall structure of a drilling rig grouting device in the prior art;

[0031] Figure 6 for Figure 5 A partial enlarged schematic diagram of B in the figure.

[0032] Description of reference numerals:

[0033] 1-grouting anchor rod; 11-grouting channel; 12-grouting inlet; 13-grouting outlet; 2-connecting device; 3-first joint; 4-sealing mechanism; 41-first sealing member; 411-clamping portion; 412-connecting portion; 413-transition portion; 42-connecting assembly; 421-adapter plate; 4211-installing portion; 4212-sealing portion; 4213-sealing chamber; 422-second sealing member; 423-sealing plate; 4231-connecting pipe; 4232-retaining ring; 43v clamping member; 5-flushing mechanism; 51-housing; 511-liquid inlet hole; 52-flushing chamber; 6-segment; 61-prefabricated hole; 62-prefabricated member; 621-second joint; 622-ball valve; 7-drilling rig body, 71-head. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The utility model provides a drilling rig grouting device, such as Figure 1 As shown, it at least includes a grouting anchor rod 1, a connecting device 2, a first joint 3 and a sealing mechanism 4.

[0038] A grouting channel 11 is arranged inside the grouting anchor rod 1, and a grouting inlet 12 and a grouting outlet 13 connected to the grouting channel are arranged at both ends.

[0039] like Figure 2 As shown, in this embodiment, the grout inlet 12 is located on the side wall of the grouting anchor rod 1, and the grout outlet is located on the lower end surface of the grouting anchor rod 1.

[0040] One end of the connecting device 2 is fixedly connected to the drilling rig body 7, and the other end is sleeved on the grouting anchor rod 1 to clamp and fix the grouting anchor rod.

[0041] The first joint 3 is sleeved on the grouting anchor rod for connecting the preset part 62 preset on the pipe segment 6 .

[0042] In this embodiment, the tube sheet 6 is provided with a plurality of prefabricated holes 61, and the prefabricated holes are provided with fixedly connected prefabricated parts 62, and the prefabricated parts include a second joint 621 fixedly connected to the tube sheet 6 and communicating with the prefabricated holes 61, and a ball valve 622 connected to the second joint. The first joint 3 is used to connect the ball valve 622, and the first joint is provided with an external thread, and a corresponding position of the ball valve is provided with a matching internal thread, and the first joint is connected to the ball valve through threads.

[0043] The sealing mechanism at least includes a first seal 41 sleeved on the grouting anchor and a connecting assembly 42 fixedly connected to the connecting device. One end of the first seal is fixedly connected to the connecting assembly, and the other end extends between the first joint and the grouting anchor to be tightly matched with the first joint and the grouting anchor. With such a structural design, during the grouting operation of the drilling rig, the pressure grouting technology is used, and the inner cavity of the first seal is deformed under the action of the grouting pressure and expands radially outward. This radial expansion increases the pressure on the contact surface between the first seal and the first joint, so that the first seal is pressed against the first joint, resulting in a better sealing effect and making the seal more reliable.

[0044] The connecting assembly 42 includes an adapter plate 421, a second seal 422 and a sealing plate 423 which are sequentially sleeved on the grouting anchor rod. The upper end surface of the adapter plate is fixedly connected to the connecting device, and the sealing plate is fixedly connected to the lower end surface of the adapter plate and the second seal is pressed against the lower end surface of the adapter plate.

[0045] like Figure 3 As shown, in this embodiment, the adapter plate 421 includes a mounting portion 4211 fixedly connected to the connecting device 2 and a hollow sealing portion 4212 extending outward from the end surface of the mounting portion away from the connecting device, the sealing plate is fixedly connected to the sealing portion to form a sealing cavity 4213, and the second sealing member 422 is located in the sealing cavity.

[0046] Preferably, the second seal 422 is tightly fitted with the grouting anchor. During the pressure grouting operation, the grouting anchor needs to extend into the prefabricated hole of the pipe segment, and the grouting anchor moves axially relative to the first seal. During the axial movement of the grouting anchor, the inner cavity surface of the first seal is worn, and the inner cavity of the first seal is depressurized, causing the slurry to leak axially along the grouting anchor. The second seal is sleeved on the grouting anchor and is tightly fitted with the grouting anchor. With such a structural design, when the inner cavity of the first seal is depressurized due to wear, the second seal acts as a second sealing protection to ensure that the slurry does not leak axially along the grouting anchor.

[0047] like Figure 4 As shown, a connecting pipe 4231 sleeved on the grouting anchor is fixedly connected to the sealing plate 423 on one side away from the sealing cavity 4213. The first sealing member 41 includes a clamping portion 411, a connecting portion 412, and a transition portion 413 between the clamping portion and the connecting portion, the clamping portion is adapted to the connecting pipe, the first sealing member is fixedly connected to the sealing plate through the clamping portion and the connecting pipe, and the connecting portion is adapted to the first joint.

[0048] In this embodiment, the connecting pipe 4231 is fixedly connected to the sealing plate 423 by welding, and the clamping portion is wrapped around the outer surface of the connecting portion 4231 .

[0049] Preferably, the sealing mechanism 4 further comprises a clamping member 43, which is sleeved on the clamping portion 411 and presses the clamping portion against the outer surface of the connecting pipe. In this embodiment, the clamping member is a pipe clamp, and the clamping portion of the first sealing member is pressed against the outer surface of the connecting pipe by bolts.

[0050] In this embodiment, a retaining ring 4232 is installed between the clamping portion and the connecting pipe, and the clamping member is located above the retaining ring. The first sealing member is fixedly connected to the sealing plate through the retaining ring and the clamping member to ensure the reliability of the seal.

[0051] Preferably, the transition portion 413 of the first seal is tapered from the clamping portion 411 to the connecting portion 412. With such a structural design, during the drilling rig grouting operation, the pressure grouting technology is adopted, and the transition portion, under the action of the grouting pressure, generates pressure perpendicular to the tapered surface due to the setting of the tapered structure, and the first seal is pressed against the first joint in the radial and axial directions, thereby generating a better sealing effect and making the seal more reliable.

[0052] The utility model provides a drilling rig grouting device, such as Figure 1 As shown, it also includes a flushing mechanism 5, which includes a housing 51 sleeved on the grouting anchor rod, a flushing cavity 52 matching the outer surface of the grouting anchor rod is provided in the housing, and a liquid inlet 511 connected to the flushing cavity is provided in the housing. The mud located outside the grouting anchor rod can be cleaned by the flushing mechanism.

[0053] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling rig grouting device, characterized in that: At least: A grouting anchor rod (1), wherein a grouting channel (11) is arranged inside the grouting anchor rod, and a grouting inlet (12) and a grouting outlet (13) connected to the grouting channel are arranged at both ends; A connecting device (2), one end of which is fixedly connected to the drilling rig body (7), and the other end of which is sleeved on the grouting anchor rod for clamping and fixing the grouting anchor rod (1); A first joint (3), which is sleeved on the grouting anchor rod and is used to connect a preset part located on the pipe segment; A sealing mechanism (4), the sealing mechanism comprising at least a first sealing member (41) sleeved on the grouting anchor rod and a connecting assembly (42) fixedly connected to the connecting device (2), one end of the first sealing member being fixedly connected to the connecting assembly, and the other end extending between the first joint and the grouting anchor rod to be tightly fitted with the first joint and the grouting anchor rod.

2. A drilling rig grouting device according to claim 1, characterized in that: The connection assembly (42) comprises an adapter plate (421), a second sealing member (422) and a sealing plate (423) which are sequentially sleeved on the grouting anchor rod, the upper end surface of the adapter plate being fixedly connected to the connection device, the sealing plate being fixedly connected to the lower end surface of the adapter plate and the second sealing member being pressed tightly against the lower end surface of the adapter plate.

3. A drilling rig grouting device according to claim 2, characterized in that: The second sealing member and the grouting anchor rod are tightly fitted.

4. A drilling rig grouting device according to any one of claims 2-3, characterized in that: The adapter plate (421) comprises a mounting portion (4211) fixedly connected to the connecting device and a hollow sealing portion (4212) extending outwardly from an end surface of the mounting portion away from the connecting device, the sealing plate is fixedly connected to the sealing portion to form a sealing cavity (4213), and the second sealing member is located in the sealing cavity.

5. A drilling rig grouting device according to claim 4, characterized in that: A connecting pipe (4231) sleeved on the grouting anchor rod is fixedly connected to the side of the sealing plate (423) away from the sealing cavity (4213).

6. A drilling rig grouting device according to claim 5, characterized in that: The first sealing member (41) comprises a clamping portion (411), a connecting portion (412) and a transition portion (413) located between the clamping portion and the connecting portion, the clamping portion is adapted to the connecting pipe, the first sealing member is fixedly connected to the sealing plate via the clamping portion and the connecting pipe, and the connecting portion is adapted to the first joint.

7. A drilling rig grouting device according to claim 6, characterized in that: The sealing mechanism (4) further comprises a clamping member (43), which is sleeved on the clamping portion (411) and presses the clamping portion against the outer surface of the connecting pipe.

8. A drilling rig grouting device according to claim 7, characterized in that: A retaining ring (4232) is installed between the clamping portion and the connecting pipe.

9. A drilling rig grouting device according to claim 8, characterized in that: The transition portion is arranged to be gradually tapered from the clamping portion to the connecting portion.

10. A drilling rig grouting device according to any one of claims 1-3 or 5-9, characterized in that: It also comprises a flushing mechanism (5), the flushing mechanism comprising a shell (51) sleeved on the grouting anchor rod, a flushing cavity (52) matching the outer surface of the grouting anchor rod is arranged in the shell, and the shell is provided with a liquid inlet hole (511) connected to the flushing cavity.

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