Automatic milling machine for central ditch of tunnel

Abstract

The utility model discloses an automatic milling machine for a central ditch of a tunnel, which belongs to the technical field of concrete facade dabbing and milling and comprises a mounting frame, a milling mechanism, a moving mechanism and a power system, at least one milling mechanism is arranged below the mounting frame and acts on one of the two side walls of the central ditch; the power system is mounted on the mounting frame and connected with the milling mechanism, and the power system is used for driving the milling mechanism to rotate; and a moving mechanism for driving the mounting frame to move is arranged below the mounting frame. The automatic milling machine for the central ditch of the tunnel, provided by the utility model, is a device for milling and scabbling a concrete facade, which is designed aiming at secondary pouring of the central ditch of the tunnel, and the mode of manually holding the milling machine by hand is replaced by automatic milling, so that the construction efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete facade roughening and milling, in particular to an automatic milling machine for a central water ditch of a tunnel. Background Art

[0002] During the tunnel construction process, the construction technology of the invert is diverse. Some construction units cast the central ditch during the casting process of the invert. However, the ditch formed by this casting process has a large volume of concrete in the invert foundation and there is a mold expansion, which leads to poor ditch formation, and the linearity and appearance quality cannot be effectively controlled. With the increasingly stringent supervision of engineering quality, the appearance quality of the central ditch is also a major inspection item in tunnel construction. Therefore, in order to ensure the quality of the ditch, most tunnel units will cast the central ditch for the second time after the main construction of the tunnel is completed to ensure the quality. Before the second casting, the vertical surface of the secondary casting of the central ditch, that is, the side wall, needs to be milled and roughened to ensure good bonding performance between the secondary cast concrete and the original concrete.

[0003] Most of the existing milling machines are used on flat ground. They are equipped with operating handles and rotating milling heads, and are manually pushed to mill and roughen the ground. Therefore, the milling of the side walls of the central ditch of the tunnel is mostly done by manually holding the milling machine, which is divided into the left and right sides for step-by-step milling and roughening. The problems with this method are: milling takes a long time during the construction process; and the concrete dust is large, and the personnel holding the milling machine for a long time will cause great harm to the personnel.

[0004] In summary, it is urgent to design an automatic milling device to achieve rapid milling and roughening of the vertical concrete surface of the central ditch, improve construction efficiency and reduce labor costs. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides an automatic milling machine for the central water ditch of a tunnel, which is intended to solve the problem that the existing milling machine cannot realize automatic milling of the vertical surface well and has low construction efficiency. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] An automatic milling machine for a tunnel central ditch comprises a mounting frame, a milling mechanism, a moving mechanism and a power system; at least one milling mechanism is provided below the mounting frame, and at least one of the two side walls of the central ditch is acted on; the power system is installed on the mounting frame and connected to the milling mechanism, and the power system is used to drive the milling mechanism to rotate; a moving mechanism for driving the mounting frame to move is provided below the mounting frame.

[0007] Furthermore, there are two milling mechanisms, and the two milling mechanisms act on the two side walls of the central ditch respectively; the two milling mechanisms are rotatably connected to the mounting frame respectively, and the two milling mechanisms are adjustably connected to the mounting frame.

[0008] Furthermore, the milling mechanism includes a rotating spindle connecting frame and a rotating spindle, the rotating spindle is rotatably connected to the rotating spindle connecting frame, and the rotating spindle connecting frame is adjustably connected to the mounting frame; the rotating spindle extends in the up and down directions; one end of the rotating spindle is directly or indirectly connected to the output end of the power system; a plurality of groups of milling blades are fixedly connected to the outer side of the rotating spindle, and the plurality of groups of milling blades are distributed in a circular array on the outer side of the rotating spindle.

[0009] Furthermore, a connecting block is fixedly provided on the mounting frame, and a long screw rod is inserted through the connecting block, and the long screw rod extends in the left and right direction; the rotating spindle connecting frame is located at one end of the long screw rod; the long screw rod can rotate to drive the rotating spindle connecting frame to move in the left and right direction.

[0010] Furthermore, a forward and reverse screw rod is provided between the two rotating spindle connecting frames, and the forward and reverse screw rod is used for relative locking of the two rotating spindle connecting frames after they are adjusted into place.

[0011] Furthermore, the power system includes two rotating motors, and the two rotating motors correspond to the two milling mechanisms one by one; the output ends of the rotating motors are connected to the rotating spindles through a power transmission belt.

[0012] Furthermore, the moving mechanism includes four rollers arranged at the edge of the lower bottom surface of the mounting frame, and the four rollers are respectively connected to the mounting frame through flange plates.

[0013] Furthermore, the roller is a universal wheel.

[0014] Furthermore, it also includes a guiding mechanism, which is arranged at the front end of the mounting frame and is used to guide the movement of the moving mechanism.

[0015] Furthermore, the guide mechanism includes a guide frame and at least two guide wheels, the guide frame is fixedly connected to the mounting frame, at least two guide wheels are adjustably connected to the guide frame, and at least two guide wheels act on two side walls of the central ditch respectively.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model provides an automatic milling machine for the central ditch of a tunnel, which is a device for milling and roughening concrete facades designed for the secondary pouring of the central ditch of the tunnel. The device comprises a mounting frame, a milling mechanism, a moving mechanism and a power system. The automatic milling replaces the manual handheld milling machine to improve construction efficiency and reduce labor costs.

[0018] 2. The utility model provides an automatic milling machine for the central ditch of a tunnel, which is designed with two milling mechanisms, the spacing between which can be freely adjusted according to the spacing between the central ditch, so that the concrete facades on both side walls of the central ditch can be milled and roughened simultaneously; the milling mechanism drives the milling blade to mill the concrete side wall by rotating the main shaft, so as to realize the automatic and rapid milling operation of the side wall of the central ditch.

[0019] 3. The utility model provides an automatic milling machine for the central ditch of a tunnel, which is provided with a moving mechanism, and utilizes the power generated by the mounting frame during the milling process to realize the automatic movement of the milling machine; at the same time, in order to ensure that the milling machine is in close contact with the central ditch during automatic movement during operation, a guide mechanism is also designed at the front end of the milling machine, and the guide wheel of the guide mechanism guides the milling machine by rolling on the concrete facade of the side wall of the central ditch, thereby achieving the technical purpose of automatically guiding the milling machine and realizing the rapid milling of the central ditch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an automatic milling machine for a tunnel center ditch provided by the utility model;

[0021] Figure 2 It is a structural schematic diagram of the mounting frame provided by the utility model;

[0022] Figure 3 It is a structural schematic diagram of the guide mechanism provided by the utility model;

[0023] In the attached figure:

[0024] 1-mounting frame, 2-rotating spindle connecting frame, 3-rotating spindle, 4-milling blade, 5-connecting block, 6-long screw, 7-positive and negative screw, 8-rotating motor, 9-roller, 10-flange plate, 11-guide frame, 12-guide wheel. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0026] Embodiment 1:

[0027] See attached Figures 1 to 3The utility model discloses an automatic milling machine for the central ditch of a tunnel. During the secondary concrete pouring construction of the central ditch of the tunnel, the original ditch side wall needs to be milled and roughened to ensure good bonding performance between the secondary poured concrete and the original concrete, and to achieve rapid automatic milling and roughening of the concrete on the side wall of the central ditch. Specifically, the automatic milling machine for the central ditch of the tunnel includes a mounting frame 1, a milling mechanism, a moving mechanism and a power system, such as Figure 1 and Figure 2 As shown, the mounting frame 1 is used as a basic structural member to install a milling mechanism, a moving mechanism and a power system. At least one milling mechanism is provided below the mounting frame 1, and at least one milling mechanism acts on one of the two side walls of the central ditch; preferably, there are two milling mechanisms, and the two milling mechanisms act on the two side walls of the central ditch at the same time. When the milling mechanism acts on the side wall of the central ditch, for example, the milling blade can be used to make a rotating motion, and the tooth tip of the milling blade can be used to mill and roughen the concrete facade. The power system can be directly or indirectly connected to the milling mechanism, and the power system is used to provide power for the milling mechanism operation. For example, the power system can be an asynchronous motor. At the same time, in combination with the milling process, the milling mechanism has relative movement relative to the concrete side wall. A moving mechanism for driving the mounting frame 1 to move is also provided below the mounting frame 1, and the power generated by the mounting frame 1 during the milling process is used to realize the automatic travel of the milling machine. The operator can also control the power system through a remote control.

[0028] The utility model discloses an automatic milling machine for a tunnel central ditch, which can realize rapid automatic milling and roughening operations of concrete on the side wall of the central ditch. The automatic movement of the milling machine replaces the manual handheld milling machine, thereby improving construction efficiency and reducing labor costs.

[0029] Embodiment 2:

[0030] See attached Figures 1 to 3 . On the basis of the first embodiment, in order to ensure the simultaneous milling and roughening of the concrete on the two side walls of the central ditch, in this embodiment, there are two milling mechanisms, and the length direction of the central ditch is defined as the front-to-back direction, and the direction of the two side walls is defined as the left-right direction. The two milling mechanisms are arranged on the left and right, and the two milling mechanisms act on the two side walls of the central ditch respectively. The two milling mechanisms are rotatably connected to the mounting frame 1, and the spacing between the two milling mechanisms can be freely adjusted according to the spacing between the central ditch. The two side walls of the central ditch are milled and roughened at the same time by the two milling mechanisms arranged on the left and right, so as to realize the automatic and rapid milling and roughening of the side walls of the central ditch.

[0031] Among them, the specific structure of the milling mechanism is:

[0032] The milling mechanism includes a rotating spindle connecting frame 2 and a rotating spindle 3. The rotating spindle 3 is rotatably connected to the rotating spindle connecting frame 2. The rotating spindle connecting frame 2 is adjustably connected to the mounting frame 1. The spacing between the two rotating spindles 3 can be adjusted by adjusting the left and right positions of the rotating spindle connecting frame 2 to adapt to the central water ditch of different widths. The rotating spindle 3 extends in the up and down direction and is arranged parallel to the side wall of the central water ditch. One end of the rotating spindle 3 is directly or indirectly connected to the output end of the power system. The outer side of the rotating spindle 3 is fixedly connected with multiple groups of milling blades 4, and the multiple groups of milling blades 4 are distributed in a ring array on the outer side of the rotating spindle 3. When the rotating spindle 3 rotates under the action of the power system, it drives the multiple groups of milling blades 4 installed on the outer side thereof to rotate. When the milling blades 4 rotate, the concrete facade of the side wall of the central water ditch is milled and roughened by using the tooth tips thereof. For example, three sets of milling blades 4 can be designed and installed on a single rotating spindle 3 in an equilateral triangle arrangement, and the rotating spindle 3 can drive the three sets of milling blades 4 to complete the equally spaced roughening operation of the side walls of the central ditch.

[0033] When adjusting the spacing, for example, in this embodiment, Figure 1 As shown, a connection block 5 is fixedly provided on the mounting frame 1, and the connection block 5 is penetrated and matched with a long screw 6, which extends in the left and right directions. The long screw 6 can also be matched with a nut, and the rotating spindle connecting frame 2 is located on the left or right side of the long screw 6, and the long screw 6 can rotate to drive the rotating spindle connecting frame 2 to move in the left and right directions. When the spacing needs to be adjusted, the long screw 6 is rotated, and the end of the long screw 6 abuts the rotating spindle connecting frame 2. When the long screw 6 continues to be rotated, the end of the long screw 6 pushes the rotating spindle connecting frame 2 to move left or right, thereby realizing the spacing adjustment of the abutting rotating spindle connecting frame 2. Among them, when the rotating spindle connecting frame 2 and the mounting frame 1 are connected, a possible implementation method is that the rotating spindle connecting frame 2 is provided with a threaded hole, and the mounting frame 1 is provided with a countersunk hole, and the countersunk hole and the threaded hole are connected by bolts. At the same time, the countersunk hole extends in the left and right directions and is long, so that the rotating spindle connecting frame 2 is fixedly connected to the mounting frame 1, but the two can also be fine-tuned in the left and right directions.

[0034] In this embodiment, if Figure 1 As shown, a plurality of forward and reverse screw rods 7 are provided between the two rotating spindle connecting frames 2, and the two ends of the forward and reverse screw rods 7 are respectively connected to the two rotating spindle connecting frames 2. When the rotating spindle connecting frames 2 move under the action of the long screw rod 6, the two ends of the forward and reverse screw rods 7 move synchronously with the rotating spindle connecting frames 2. When the two rotating spindle connecting frames 2 are adjusted into place, the relative position between the two rotating spindle connecting frames 2 can be locked by locking the forward and reverse screw rods 7.

[0035] Embodiment three:

[0036] See attached Figures 1 to 3. On the basis of the second embodiment, in this embodiment, the power system includes two rotating motors 8, and the two rotating motors 8 correspond one to one to the two rotating spindles 3 of the two milling mechanisms. The power system is mainly used to provide power output for realizing the rapid roughening of the side walls of the center ditch. Among them, due to the large vibrations in the milling and roughening process, the output end of the rotating motor 8 can be connected to the rotating spindle 3 through a power transmission belt, and the power is transmitted by the power transmission belt, which can reduce the influence of the vibration in the milling and roughening process on the power system and improve the durability of the milling machine. For example, the rotating motor 8 can adopt a three-phase asynchronous motor of the model Y132S1-4-5.5kw-B5, and the power transmission belt can adopt a power transmission B-type V-belt. The rotating motor 8 of the power system can be fixed to the mounting frame 1 by screw connection. At the same time, in order to adapt to the roughening operation of the center ditch of different sizes, the power system can also be adjusted in position on the mounting frame 1.

[0037] Embodiment 4:

[0038] See attached Figures 1 to 3 . On the basis of the third embodiment, in combination with the milling process, the milling mechanism has relative movement with respect to the concrete side wall, and a moving mechanism for driving the mounting frame 1 to move is further provided under the mounting frame 1, and the power generated on the mounting frame 1 during the milling process is utilized to realize the automatic movement of the milling machine. Among them, the moving mechanism includes four rollers 9 provided at the edge of the lower bottom surface of the mounting frame 1, and the four rollers 9 can be connected to the mounting frame 1 through flange plates 10 respectively. The four rollers 9 act on the running track surfaces on both sides of the central ditch respectively. Preferably, the rollers 9 are universal wheels.

[0039] In this embodiment, in order to ensure that the direction of the milling machine is automatically adjusted during the chiseling process, that is, always moving along the length direction of the central water ditch, a guide mechanism is also provided at the front end of the mounting frame 1. The guide mechanism is used to guide the movement of the moving mechanism. The guide mechanism can be installed at the front end of the mounting frame 1 through the flange plate 10. Specifically, Figure 3 As shown, the guide mechanism includes a guide frame 11 and at least two guide wheels 12. The guide frame 11 is fixedly connected to the mounting frame 1. The at least two guide wheels 12 are adjustably connected to the guide frame 11. The at least two guide wheels 12 act on the two side walls of the central ditch respectively. The guide wheels 12 guide the milling machine by rolling on the concrete facade of the side wall of the central ditch, so as to achieve the technical purpose of realizing the automatic travel of the milling machine. Figure 3 As shown, a method for realizing an adjustable connection between a guide wheel 12 and a guide frame 11 is shown, wherein the guide wheel 12 and the guide frame 11 are connected via a long threaded rod, one end of the long threaded rod is fixedly connected to the guide wheel 12, and the other end is threadedly connected to the guide frame 11, and a nut is provided on the long threaded rod. By adjusting the long threaded rod, the spacing between the two guide wheels 12 can be adjusted.

[0040] The operation process of the automatic milling machine for the central ditch of a tunnel disclosed by the utility model is as follows:

[0041] The various components of the milling machine are installed and positioned, and the operator adjusts the distance between the milling blade 4 and the concrete side wall of the central ditch to ensure that when the milling blade 4 rotates to the concrete side wall, the cutter head of the milling blade 4 is inserted into the concrete surface by about 8 cm; after the adjustment is completed, the position of the milling blade 4 is locked by locking the positive and negative screws 7; then the power transmission belt tensioning device is adjusted to tension the power transmission belt to ensure the smoothness of power transmission; the operator installs the guide wheel 12, and arranges a guide wheel 12 on each side, and the concrete side wall is rolled and guided by the two guide wheels 12. After the installation of the milling machine is completed, the operator starts the two rotating motors 8 by operating the controller, and the power transmission belt transmits power to the rotating spindle 3. The rotating spindle 3 drives multiple groups of milling blades 4 to rotate, and the milling blades 4 produce relative movement with respect to the concrete surface to achieve the roughening operation of the concrete surface; at the same time, the force generated by the milling blades 4 is used to push the milling machine forward to achieve automatic forward movement during the roughening process; at the same time, the guide wheels 12 are used to guide the running process to achieve rapid and automated roughening operations on the side walls of the central ditch of the tunnel.

[0042] The utility model provides an automatic milling machine for a tunnel center ditch, which effectively solves the technical problem of roughening the concrete side wall before secondary pouring of the tunnel center ditch, and avoids the problems of low construction efficiency and unhealthy and environmentally friendly operations existing in traditional manual handheld milling machines.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0045] In the description of the present invention, "plurality" means two or more.

[0046] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0047] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automatic milling machine for a tunnel center ditch, characterized in that: The invention comprises a mounting frame (1), a milling mechanism, a moving mechanism and a power system; at least one milling mechanism is provided below the mounting frame (1), and at least one of the milling mechanisms acts on one of the two side walls of a central water ditch; the power system is installed on the mounting frame (1) and connected to the milling mechanism, and the power system is used to drive the milling mechanism to rotate; and a moving mechanism is provided below the mounting frame (1) for driving the mounting frame (1) to move.

2. The automatic milling machine for the central water ditch of a tunnel according to claim 1, characterized in that: There are two milling mechanisms, which act on two side walls of the central water ditch respectively; the two milling mechanisms are rotatably connected to the mounting frame (1) respectively, and the two milling mechanisms are adjustably connected to the mounting frame (1).

3. The automatic milling machine for the central water ditch of a tunnel according to claim 2, characterized in that: The milling mechanism comprises a rotating spindle connecting frame (2) and a rotating spindle (3), wherein the rotating spindle (3) is rotatably connected to the rotating spindle connecting frame (2), and the rotating spindle connecting frame (2) is adjustably connected to the mounting frame (1); the rotating spindle (3) extends in the up-down direction; one end of the rotating spindle (3) is directly or indirectly connected to the output end of the power system; and a plurality of groups of milling blades (4) are fixedly connected to the outer side of the rotating spindle (3), and the plurality of groups of milling blades (4) are distributed in a ring array on the outer side of the rotating spindle (3).

4. The automatic milling machine for the central water ditch of a tunnel according to claim 3, characterized in that: A connecting block (5) is fixedly provided on the mounting frame (1), and a long screw (6) is inserted through the connecting block (5), and the long screw (6) extends in the left-right direction; the rotating spindle connecting frame (2) is located at one end of the long screw (6); the long screw (6) can rotate to drive the rotating spindle connecting frame (2) to move in the left-right direction.

5. The automatic milling machine for the central water ditch of a tunnel according to claim 4, characterized in that: A forward and reverse screw rod (7) is also provided between the two connecting frames (2), and the forward and reverse screw rod (7) is used for relative locking of the two rotating spindle connecting frames (2) after they are adjusted into place.

6. The automatic milling machine for the central water ditch of a tunnel according to claim 3, characterized in that: The power system comprises two rotating motors (8), and the two rotating motors (8) correspond to the two milling mechanisms one by one; the output end of the rotating motor (8) is connected to the rotating spindle (3) via a power transmission belt.

7. The automatic milling machine for the central water ditch of a tunnel according to claim 1, characterized in that: The moving mechanism comprises four rollers (9) arranged at the edge of the lower bottom surface of the mounting frame (1), and the four rollers (9) are respectively connected to the mounting frame (1) through flange plates (10).

8. The automatic milling machine for the central water ditch of a tunnel according to claim 7, characterized in that: The roller (9) is a universal wheel.

9. The automatic milling machine for the central water ditch of a tunnel according to claim 1, characterized in that: It also comprises a guiding mechanism, which is arranged at the front end of the mounting frame (1) and is used to guide the movement of the moving mechanism.

10. The automatic milling machine for the central water ditch of a tunnel according to claim 9, characterized in that: The guide mechanism comprises a guide frame (11) and at least two guide wheels (12); the guide frame (11) is fixedly connected to the mounting frame (1); at least two guide wheels (12) are adjustably connected to the guide frame (11); and at least two guide wheels (12) act on two side walls of the central ditch respectively.

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