Propeller

Abstract

The utility model relates to the technical field of advance support of tunnel construction, in particular to a propeller used for pushing an advance small guide pipe, the propeller comprises a fixing frame and a rock drill, the rock drill is connected to the fixing frame in a sliding mode, the rock drill is connected with a bit shank, and the bit shank is used for being connected with the advance small guide pipe. The fixing frame is provided with a pipe supporting device assembly used for limiting the advanced small guide pipe. A supporting plate is arranged on the fixing frame in a sliding mode, the rock drill is arranged on the supporting plate, the supporting plate is connected with a first driving assembly, and the first driving assembly is used for driving the supporting plate to slide on the fixing frame. Due to the fact that the pipe supporting device assembly is arranged on the fixing frame, the pipe supporting device assembly plays a role in limiting and guiding the advanced small guide pipe, the advanced small guide pipe can be effectively prevented from shaking in the hole entering process, the advanced small guide pipe is more stable when entering the hole, and hole entering of the advanced small guide pipe is more convenient and efficient.

Description

Technical Field

[0001] This disclosure relates to the field of advanced support technology in tunnel construction, and in particular to a propeller for pushing advanced small guide pipes. Background Technology

[0002] Tunnels are structures built underground, underwater, or within mountains to carry railways or highways for motor vehicles. The tunnel pre-support structure system is crucial for controlling the stability of the surrounding rock and is a fundamental task in tunnel design and construction. For weak and fractured surrounding rock with poor self-stability, pre-reinforcement and pre-support measures are typically used to improve tunnel construction safety. Pre-reinforcement essentially increases the strength of the surrounding rock, making it less prone to severe damage, maintaining a certain self-stability time, and adjusting the load-bearing capacity of the surrounding rock. Pre-support essentially forms a pre-load-bearing arch to support the load of the surrounding rock, protecting the excavation face and tunnel space, and assisting in the load-bearing capacity of the surrounding rock.

[0003] Pre-drilled small guide pipes are mainly used for injecting grout during tunnel construction. They have strong pressure and impact resistance and are a special type of pipe that can effectively protect the tunnel walls. In addition, pre-drilled small guide pipes also have a certain degree of water resistance, which can prevent groundwater from seeping into the tunnel.

[0004] Before using advanced small guide pipes for support, holes need to be drilled in advance using a manual electric drill, and then the advanced small guide pipes are inserted into the holes. However, the advanced small guide pipes are prone to shaking during the insertion process, which will cause a certain angle deviation, which will affect the support effect to some extent. Utility Model Content

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a pusher that can conveniently and stably insert the advanced small guide tube into the hole, effectively avoiding shaking when the advanced small guide tube enters the hole.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problems is as follows: a propeller, including a fixed frame and a rock drill, wherein the rock drill is slidably connected to the fixed frame, the rock drill is connected to a drill bit, the drill bit is used to connect to a lead guide tube, and a guide tube assembly for limiting the lead guide tube is provided on the fixed frame.

[0007] In a preferred embodiment, a support plate is slidably disposed on the fixed frame, the rock drill is disposed on the support plate, and the support plate is connected to a first drive assembly, which is used to drive the support plate to slide on the fixed frame.

[0008] In a preferred embodiment, the drill bit includes a rod body and a transition joint. The first end of the rod body is connected to the rock drill, the second end of the rod body is connected to the transition joint, and the drill bit is connected to the advance guide tube through the transition joint.

[0009] In a preferred embodiment, the transition joint is sleeved on the outside of the second end of the rod body, the second end of the rod body is provided with a connecting protrusion, the transition joint is provided with a connecting groove, and the connecting protrusion is located in the connecting groove.

[0010] In a preferred embodiment, the transition joint is provided with a circular connecting surface, the diameter of which is larger than the inner diameter of the advanced small conduit. A first protrusion is provided on the connecting surface, the first protrusion being located inside the advanced small conduit, and the end of the advanced small conduit abutting against the connecting surface.

[0011] In a preferred embodiment, the connecting groove includes a first groove and a second groove that are interconnected. The second groove is disposed at the bottom of the first groove. The inner diameter of the first groove is adapted to the outer diameter of the rod. The connecting protrusion is located in the second groove.

[0012] In a preferred embodiment, the second groove includes a conical section and an annular section. The annular section is located at the bottom of the second groove, and the outer peripheral wall of the connecting protrusion fits into the inner peripheral wall of the annular section. A gap is provided between the outer peripheral wall of the connecting protrusion and the annular section.

[0013] In a preferred embodiment, the pipe support assembly includes a first pipe support, a first mounting plate slidably connected to the fixing frame, the first pipe support being located on the first mounting plate, and a second driving assembly connected to the first mounting plate, the second driving assembly being used to drive the first mounting plate to slide on the fixing frame.

[0014] In a preferred embodiment, the pipe support assembly further includes a second pipe support, which is disposed at the end of the fixing frame, and the first pipe support is disposed between the rock drill and the second pipe support.

[0015] In a preferred embodiment, the second pipe support includes a first clamp arm and a second clamp arm, and the first clamp arm and the second clamp arm are respectively connected to a hydraulic cylinder, which is used to control the opening angle of the first clamp arm and the second clamp arm.

[0016] In a preferred embodiment, the first pipe support is connected to a base, the base is detachably connected to the first mounting plate, the first pipe support is provided with an opening, the advanced small guide tube enters through the opening, the opening is provided with a through hole, and the fastening bolt passes through the through hole to limit the advanced small guide tube in the first pipe support.

[0017] Compared with existing products, the pipe support assembly on the fixing frame limits and guides the pre-drilled pipe, effectively preventing it from shaking during the insertion process. This makes the pre-drilled pipe more stable during insertion, thus providing better support and making the insertion of the pre-drilled pipe more convenient and efficient. Attached Figure Description

[0018] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is one of the structural schematic diagrams of a thruster disclosed herein;

[0020] Figure 2 This is the second schematic diagram of a thruster disclosed herein;

[0021] Figure 3 This is a public announcement Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is a public announcement Figure 2 A magnified view of a section at point B in the middle;

[0023] Figure 5 This is a partial cross-sectional view of a thruster disclosed herein;

[0024] Figure 6 This is a public announcement Figure 5 A magnified view of a section at point C;

[0025] Figure 7 This is one of the sectional views of the transition joint disclosed herein;

[0026] Figure 8 This is the second sectional view of the transition joint disclosed herein.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Fixing frame; 2. Rock drill; 3. Support plate; 4. First drive assembly; 5. Drill tail; 51. Rod body; 511. Connecting protrusion; 52. Transition joint; 521. First protrusion; 522. Connecting surface; 523. First groove; 524. Second groove; 5241. Conical section; 5242. Annular section; 6. Lead guide tube; 7. First mounting plate; 8. First guide tube holder; 9. Second guide tube holder; 91. First clamp arm; 92. Second clamp arm; 10. Fastening bolt; 20. Base. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0030] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0031] Please refer to Figure 1 and Figure 2 As shown, this application provides a propeller, including a fixed frame 1 and a rock drill 2. The rock drill 2 is slidably connected to the fixed frame 1 and is connected to a drill bit 5. The drill bit 5 is used to connect to a pre-guided guide tube 6. The fixed frame 1 is provided with a guide tube assembly for limiting the pre-guided guide tube 6. The connection between the rock drill 2 and the drill bit 5 is the same as the connection method in the prior art, and will not be described again here. When the propeller is working, the rock drill 2 only propels forward and does not impact or rotate. Because the fixed frame 1 is provided with a guide tube assembly, the guide tube assembly plays a role in limiting and guiding the pre-guided guide tube 6, which can effectively prevent the pre-guided guide tube 6 from shaking during the process of entering the hole, making the pre-guided guide tube 6 more stable when entering the hole, thereby providing a better support effect, and also making the entry of the pre-guided guide tube 6 into the hole more convenient and efficient.

[0032] Furthermore, a support plate 3 is slidably mounted on the fixed frame 1, and the rock drill 2 is mounted on the support plate 3. The support plate 3 is connected to a first drive assembly 4, which is a hydraulic cylinder used to drive the support plate 3 and the rock drill 2 to slide on the fixed frame 1. The rock drill 2 slides back and forth along the length of the fixed frame 1, and the advanced guide tube 6 enters the hole under the push of the rock drill 2.

[0033] Please refer to Figure 1 , Figure 5 and Figure 6 As shown, in one embodiment of this disclosure, the drill bit 5 includes a rod 51 and a transition joint 52. The first end of the rod 51 is connected to the head of the rock drill 2, and the second end of the rod 51 is connected to the transition joint 52. The drill bit 5 is connected to the advance guide tube 6 through the transition joint 52. Specifically, the transition joint 52 is sleeved on the outside of the second end of the rod 51. The second end of the rod 51 is provided with a connecting protrusion 511, and the transition joint 52 is provided with a connecting groove, in which the connecting protrusion 511 is located.

[0034] Please refer to the following: Figure 7 and Figure 8 As shown, the transition joint 52 further includes a circular connecting surface 522, the diameter of which is larger than the inner diameter of the advance guide tube 6. A first protrusion 521, which is tapered, is provided on the connecting surface 522 and is located inside the advance guide tube 6. The end of the advance guide tube 6 abuts against the connecting surface 522. It should be noted that when the rock drill 2 pushes the advance guide tube 6 into the hole, the guide tube assembly always limits the advance guide tube 6, ensuring that the end of the advance guide tube 6 remains in contact with the connecting surface 522 without any displacement.

[0035] Furthermore, the connecting groove includes a first groove 523 and a second groove 524 that are interconnected. A stepped surface is formed at the transition between the first groove 523 and the second groove 524. The second groove 524 is located at the bottom of the first groove 523. The inner diameter of the first groove 523 is adapted to the outer diameter of the rod 51. A portion of the second end of the rod 51 is located in the first groove 523, and the connecting protrusion 511 is located in the second groove 524. More specifically, the second groove 524 includes a conical section 5241 and an annular section 5242. The inner diameter of the conical section 5241 gradually decreases from the first groove 523 towards the annular section 5242. The inner diameter of the annular section 5242 is equal to the inner diameter of the narrowest point of the conical section 5241. The annular section 5242 is located at the bottom of the second groove 524. The connecting protrusion 511 is also a conical structure. The outer peripheral wall of the connecting protrusion 511 fits against the inner peripheral wall of the annular section 5242, and the end of the connecting protrusion 511 contacts the bottom of the annular section 5242. This arrangement allows the transition joint 52 to be tightly connected to the rod 51, which on the one hand can better transmit the thrust of the rock drill 2 to the advance small The conduit 6, on the other hand, can prevent the rod 51 and the transition joint 52 from shaking; a gap is provided between the outer peripheral wall of the connecting protrusion 511 and the annular section 5242. The working environment of the thruster is harsh, and dust and sand particles in the environment are very easy to accumulate on the surface of various components. When the rod 51 and the transition joint 52 are connected, some dust will inevitably enter the connecting groove with the rod 51 and accumulate in the second groove 524. Since the end of the connecting protrusion 511 will exert a large thrust on the bottom of the annular section 5242, over time, the dust in the second groove 524 will be squeezed into the gap between the outer peripheral wall of the connecting protrusion 511 and the annular section 5242. Without this gap, a large amount of dust and sand would accumulate at the bottom of the second groove 524. This dust and sand would be located between the end of the connecting protrusion 511 and the bottom of the second groove 524, and the contact between the end of the connecting protrusion 511 and the bottom of the annular section 5242 would no longer be tight, which would seriously affect the tightness and stability of the connection between the two, and would affect the pushing of the rock drill 2 on the advanced small guide tube 6.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of this disclosure, the pipe support assembly includes a first pipe support 8, a first mounting plate 7 slidably connected to a fixing frame 1, the first pipe support 8 located on the first mounting plate 7, and a second driving assembly connected to the first mounting plate 7. The second driving assembly is a hydraulic cylinder, used to drive the first mounting plate 7 to slide on the fixing frame 1. By using a cylinder to drive the first mounting plate 7 to slide on the fixing frame 1, the sliding of the first mounting plate 7 drives the sliding of the first pipe support 8 on it, thus allowing adjustment of the specific position of the first pipe support 8 as needed, making it more convenient and flexible to use. Specifically, the first pipe support 8 is connected to a base 20, and the base 20 is bolted to the first mounting plate 7. The first pipe support 8 is roughly C-shaped and has an opening through which a small guide tube 6 enters the first pipe support 8. Two through holes are provided at the opening, through which fastening bolts 10 pass to limit the small guide tube 6 to its position on the first pipe support 8. The first pipe support 8 mainly limits the middle portion of the small guide tube 6. It should be noted that after the fastening bolt 10 is connected to the opening, the pre-conduit 6 is clamped and confined in the first pipe support 8. One side of the outer wall of the pre-conduit 6 is in contact with the inner wall of the pre-conduit 6, and the other side of the outer wall of the pre-conduit 6 is in contact with the fastening bolt 10, thus confining the pre-conduit 6 relatively securely in the first pipe support 8. In addition, the degree of clamping (tightness) of the first pipe support 8 on the pre-conduit 6 can be adjusted by adjusting the tightness of the fastening bolt 10.

[0037] Please refer to the following: Figure 3As shown, to enhance the limiting of the pre-conduit guide tube 6, the guide tube assembly also includes a second guide tube 9. The second guide tube 9 is located at the end of the fixing frame 1 and is used to limit the head of the pre-conduit guide tube 6. The first guide tube 8 is located between the rock drill 2 and the second guide tube 9. Specifically, the second guide tube 9 includes a first clamping arm 91 and a second clamping arm 92, which interlock to form a receiving space in which the pre-conduit guide tube 6 is located. The first clamping arm 91 and the second clamping arm 92 are respectively connected to hydraulic cylinders, which are used to control and adjust the opening angle of the first clamping arm 91 and the second clamping arm 92 to adjust the clamping degree (tightness) of the second guide tube 9 on the pre-conduit guide tube 6. It should be noted that the clamping of the pre-conduit guide tube 6 by the first guide tube 8 and the second guide tube 9 is relatively tight, preventing the pre-conduit guide tube 6 from shaking in the circumferential direction. However, under the push of the rock drill 2, the pre-conduit guide tube 6 can still slide axially. By limiting the advance guide tube 6 with the first guide tube 8 and the second guide tube 9, the advance guide tube 6 will be less likely to wobble in the circumferential direction during the process of entering the hole. In this way, the advance guide tube 6 can be directly entered into the pre-drilled hole under the propulsion of the rock drill 2 without angular deviation. This not only facilitates the entry into the hole, but also improves the support effect.

[0038] A third guide tube can also be installed as needed to further limit the pre-insertion guide tube 6 and prevent it from shaking during insertion.

[0039] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A thruster, characterized in that, The device includes a fixed frame (1) and a rock drill (2). The rock drill (2) is slidably connected to the fixed frame (1). The rock drill (2) is connected to a drill bit (5). The drill bit (5) is used to connect to a small guide tube (6). The fixed frame (1) is provided with a guide tube assembly for limiting the small guide tube (6). The guide tube assembly includes a first guide tube (8). A first mounting plate (7) is slidably connected to the fixed frame (1). The first guide tube (8) is located on the first mounting plate (7). The first mounting plate (7) is connected to a second drive assembly. The second drive assembly is used to drive the first mounting plate (7) to slide on the fixed frame (1). The guide tube assembly also includes a second guide tube (9). The second guide tube (9) is located at the end of the fixed frame (1). The first guide tube (8) is located between the rock drill (2) and the second guide tube (9).

2. The thruster according to claim 1, characterized in that, A support plate (3) is slidably disposed on the fixed frame (1), and the rock drill (2) is disposed on the support plate (3). The support plate (3) is connected to a first drive assembly (4), which is used to drive the support plate (3) to slide on the fixed frame (1).

3. The thruster according to claim 1, characterized in that, The drill bit (5) includes a rod (51) and a transition joint (52). The first end of the rod (51) is connected to the rock drill (2), and the second end of the rod (51) is connected to the transition joint (52). The drill bit (5) is connected to the advanced small guide tube (6) through the transition joint (52).

4. The thruster according to claim 3, characterized in that, The transition joint (52) is sleeved on the outside of the second end of the rod (51). The second end of the rod (51) is provided with a connecting protrusion (511). The transition joint (52) is provided with a connecting groove. The connecting protrusion (511) is located in the connecting groove.

5. The thruster according to claim 3, characterized in that, The transition joint (52) is provided with a circular connecting surface (522), the diameter of which is larger than the inner diameter of the advanced small conduit (6). A first protrusion (521) is provided on the connecting surface (522), the first protrusion (521) is located inside the advanced small conduit (6), and the end of the advanced small conduit (6) abuts against the connecting surface (522).

6. The thruster according to claim 4, characterized in that, The connecting groove includes a first groove (523) and a second groove (524) that are interconnected. The second groove (524) is located at the bottom of the first groove (523). The inner diameter of the first groove (523) is adapted to the outer diameter of the rod (51). The connecting protrusion (511) is located in the second groove (524).

7. The thruster according to claim 6, characterized in that, The second groove (524) includes a conical section (5241) and an annular section (5242). The annular section (5242) is located at the bottom of the second groove (524). The outer peripheral wall of the connecting protrusion (511) is in contact with the inner peripheral wall of the annular section (5242). A gap is provided between the outer peripheral wall of the connecting protrusion (511) and the annular section (5242).

8. The thruster according to claim 1, characterized in that, The second pipe support (9) includes a first clamp arm (91) and a second clamp arm (92), and the first clamp arm (91) and the second clamp arm (92) are respectively connected to a hydraulic cylinder, which is used to control the opening angle of the first clamp arm (91) and the second clamp arm (92).

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