Concrete spraying device for inner wall of tunnel

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a concrete spraying device for the inner wall of a tunnel. The device comprises a base, an arch-shaped supporting frame fixedly connected to the base, a guniting head arranged on the arch-shaped supporting frame and a conveying mechanism used for driving the guniting head to do reciprocating motion on the arch-shaped supporting frame, a water pipe is fixedly connected to the arch-shaped supporting frame, and a plurality of water spraying openings are formed in the pipe wall of the water pipe. The water pipe is provided with a communication port used for being connected with a water pump. The base is fixedly connected with a grout storage assembly used for supplying concrete grout to the grout spraying head. After guniting is completed, the surface of the device can be cleaned, and dropping concrete is prevented from affecting operation of the device; according to the device, concrete in the slurry storage barrel can be stirred, the fluidity of the concrete is improved, and the concrete is prevented from being solidified in the slurry storage barrel; a protection structure can be additionally arranged, concrete can be prevented from dripping into the device, and water flow for washing the concrete is prevented from entering the device.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a concrete spraying device for the inner wall of a tunnel. Background Art

[0002] After the tunnel excavation is completed, the tunnel generally needs initial support. For weak surrounding rock, arches must be erected and meshes must be hung. The initial support is generally carried out according to the steps of initial spraying of concrete, driving anchor rods, erecting frames, hanging meshes, and then spraying concrete. The tunnel is sprayed with concrete to ensure that it provides pressure to resist the surrounding rock before the secondary lining is applied, and to prevent local block falling and sliding. After the sprayed concrete solidifies, it will wrap all the supports, connecting the arch frame and mesh, and the arch frame and arch frame into an integral force-bearing body to form a combined support.

[0003] Chinese patent CN202022719197.8 discloses "An automatic spraying device for tunnel construction", publication number CN213775404U, the device includes at least one spraying unit; the spraying unit includes a body, a belt, a driving mechanism and a spraying mechanism; the body is a frame mechanism, and the upper surface of the body is arched; the belt is placed on the body, the driving mechanism is placed on the lower surface of the body and connected to the belt; the spraying mechanism is placed on the belt, and the driving mechanism drives the belt to drive the spraying mechanism to move in an arc along the upper surface of the body; an annular groove is opened on the body; the belt is stuck in the annular groove; the driving mechanism is placed in the annular groove; the spraying mechanism is placed on the belt on the upper surface of the annular groove; the spraying mechanism includes a base, a support frame and a spray gun connected in sequence from bottom to top; the base is placed on the belt. However, the device has some defects: after the spraying unit sprays concrete, the excess slurry on the inner wall of the tunnel will drip onto the belt. The device does not have a structure for cleaning the belt. After the concrete accumulates and solidifies, it will seriously affect the operation of the belt. Utility Model Content

[0004] In order to solve the above problems of the prior art, the utility model provides a concrete spraying device for the inner wall of a tunnel, which can clean the surface of the device after the spraying is completed to prevent dripping concrete from affecting the operation of the device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concrete spraying device for the inner wall of a tunnel, comprising a base, an arched support frame fixedly connected to the base, a grouting head arranged on the arched support frame, and a transmission mechanism for driving the grouting head to reciprocate on the arched support frame, a water pipe fixedly connected to the arched support frame, a plurality of water spraying ports are provided on the pipe wall of the water pipe, and a connecting port for connecting a water pump is provided on the water pipe; a slurry storage assembly for supplying concrete slurry to the grouting head is fixedly connected to the base.

[0006] With the above structural design, after the spraying is completed, the water pipe is connected to the water pump, and the high-pressure water sprayed from the water spray port is used to wash the surface of the device to wash away the dripping concrete and prevent the concrete from solidifying on the device.

[0007] Preferably, the transmission mechanism includes a power gear rotatably connected to the arch support frame, a driven gear rotatably connected to the arch support frame, a toothed belt sleeved on the power gear and the driven gear, and a driving motor transmission-connected to the power gear, and the spray head is fixedly connected to the toothed belt.

[0008] With the above structural design, the spray head can be reciprocated along the arch support frame by the forward and reverse rotation of the power gear, so that the spray head can spray concrete evenly on the inner wall of the tunnel.

[0009] Preferably, the slurry storage assembly includes a slurry storage barrel fixedly connected to a base, a stirring shaft rotatably connected to the slurry storage barrel, stirring blades fixedly connected to the stirring shaft, and a hose connecting the slurry storage barrel and a spray head. The power gear is fixedly connected to a rotating shaft, and a transmission belt is jointly mounted on the stirring shaft and the rotating shaft.

[0010] With the above structural design, the power gear rotates while driving the stirring shaft to rotate, thereby stirring the concrete in the slurry storage barrel, increasing the fluidity of the concrete and preventing the concrete from solidifying in the slurry storage barrel.

[0011] Preferably, a symmetrically arranged clamping plate is fixedly connected to the hose, a ball is rotatably connected to the inner side wall of the clamping plate, and the clamping plate slides on the arched support frame.

[0012] With the above structural design, when the spray head moves on the arch support frame, the flexibility of the hose moving on the arch support frame is improved, and the wear of the hose when moving on the arch support frame is reduced.

[0013] Preferably, a scraper is fixedly connected to the base, and the upper end of the scraper contacts the toothed belt.

[0014] By adopting the structural design, the concrete dripping on the toothed belt can be cleaned to prevent the concrete from accumulating on the toothed belt.

[0015] Preferably, a shielding plate is fixedly connected to the arched support frame, and the shielding plate is arched.

[0016] The above structural design can prevent concrete from dripping into the device and affecting the delicate components inside the device, and prevent water for washing concrete from entering the device and damaging the components inside the device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1) After the spraying is completed, the device can clean the surface of the device to prevent dripping concrete from affecting the operation of the device.

[0019] 2) The device can stir the concrete in the slurry storage barrel, increase the fluidity of the concrete, and prevent the concrete from solidifying in the slurry storage barrel.

[0020] 3) The device can be provided with a protective structure to prevent concrete from dripping into the interior of the device and to prevent water for flushing concrete from entering the interior of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the front side of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the utility model from the front;

[0023] Figure 3 It is a schematic diagram of the structure of the reverse side of the utility model;

[0024] Figure 4 Practical Figure 3 A schematic diagram of the structure of the enlarged internal section at point A; DETAILED DESCRIPTION

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The utility model provides a technical solution: a concrete spraying device for the inner wall of a tunnel, comprising a base 1, an arch support frame 2 fixedly connected to the base 1, a spray head 3 arranged on the arch support frame 2, and a transmission mechanism for driving the spray head 3 to reciprocate on the arch support frame 2, wherein the arch support frame 2 is provided with two and arranged in parallel with each other, and the transmission mechanism comprises a power gear 51 rotatably connected to the arch support frame 2, a driven gear 52 rotatably connected to the arch support frame 2, a toothed belt 53 sleeved on the power gear 51 and the driven gear 52, and a driving motor 54 connected to the power gear 51 in a transmission manner, and the spray head 3 is fixedly connected to the toothed belt 53. A plurality of driven gears 52 are provided, and the driven gears 52 are arranged along the arc direction of the arch support frame 2, and while supporting the toothed belt 53, the toothed belt 53 is in an arched shape.

[0026] The arch support frame 2 is fixedly connected to a water pipe 4, a plurality of water spraying ports 41 are provided on the pipe wall of the water pipe 4, and a connecting port 42 for connecting a water pump is provided on the water pipe 4; a slurry storage assembly for supplying concrete slurry to the spray head 3 is fixedly connected to the base 1.

[0027] The slurry storage assembly includes a slurry storage barrel 61 fixedly connected to the base 1, a stirring shaft 62 rotatably connected to the slurry storage barrel, a stirring blade 63 fixedly connected to the stirring shaft 62, and a hose 64 connecting the slurry storage barrel 61 and the spray head 3. The slurry storage barrel 61 is provided with a filling port 6, and the staff supplies concrete slurry to the slurry storage barrel 61 through the filling port 6. The slurry storage barrel 61 is fixedly connected to a support plate 69, and the support plate 69 is fixedly connected to the base 1. The power gear 51 is fixedly connected to a rotating shaft 65, and a transmission belt 66 is jointly sleeved on the stirring shaft 62 and the rotating shaft 65.

[0028] In this embodiment, the output shaft of the driving motor 54 is fixedly connected to the first transmission gear 68, and the first transmission gear 68 is constantly meshed with the second transmission gear 67. The second transmission gear is tightly sleeved on the rotating shaft 65, and the end of the rotating shaft 65 is fixedly connected to the shaft seat, and the shaft seat is fixedly connected to the base 1.

[0029] The support plate 69 is rotatably connected to a tensioning roller 91 for reducing the friction between the toothed belt 53 and the base 1 , while also further tensioning the toothed belt 53 .

[0030] The hose 64 is fixedly connected to a symmetrically arranged clamping plate 7 , and a ball bearing 71 is rotatably connected to the inner side wall of the clamping plate 7 . The clamping plate 7 slides on the arch support frame 2 .

[0031] The base 1 is fixedly connected to a scraper 8 , and the upper end of the scraper 8 contacts the toothed belt 53 .

[0032] The shielding plate 9 is fixedly connected to the arched support frame 2, and the shielding plate 9 is arched.

[0033] In this embodiment, the lower surface of the base 1 is fixedly connected to moving wheels to facilitate the staff to move the device.

[0034] In this embodiment, the driving motor 54 is a forward and reverse motor.

[0035] When the device is in use, the staff first moves the device to the construction site in the tunnel, and then starts the driving motor 54. The driving motor 54 drives the first transmission gear 68 to rotate, and then the second transmission gear 67 meshing with the first transmission gear 68 rotates. The second transmission gear 67 rotates to rotate the rotating shaft 68. The rotation of the rotating shaft 68 drives the driving gear 51 to rotate, and then the toothed belt 53 mounted on the driving gear 51 performs a transmission motion, so that the spray head 3 reciprocates along the arch support frame 2; the rotation of the rotating shaft 68 drives the stirring shaft 62 to rotate through the transmission belt 66, so that the stirring blade 63 stirs the concrete in the slurry storage barrel 61.

[0036] When the grouting operation is completed, the staff pushes the device away from the tunnel, and then connects the water pump to the connecting port 42, and high-pressure water is sprayed out from the water spray port 41 on the wall of the water pipe 4 to wash the outer wall of the toothed belt 53 and the outer wall of the baffle plate 9.

[0037] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0038] The present invention is described above with reference to the preferred embodiments, but the protection scope of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the protection scope of the present invention. Various improvements may be made to the present invention and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A concrete spraying device for tunnel inner wall, comprising a base (1), an arched support frame (2) fixedly connected to the base (1), a spraying head (3) arranged on the arched support frame (2), and a transmission mechanism for driving the spraying head (3) to perform reciprocating motion on the arched support frame (2), characterized in that: The arched support frame (2) is fixedly connected to a water pipe (4), a plurality of water spraying ports (41) are provided on the pipe wall of the water pipe (4), and a connecting port (42) for connecting to a water pump is provided on the water pipe (4); and a slurry storage assembly for supplying concrete slurry to the spraying head (3) is fixedly connected to the base (1).

2. A concrete spraying device for tunnel inner wall according to claim 1, characterized in that: The transmission mechanism comprises a power gear (51) rotatably connected to the arch support frame (2), a driven gear (52) rotatably connected to the arch support frame (2), a toothed belt (53) sleeved on the power gear (51) and the driven gear (52), and a driving motor (54) drivingly connected to the power gear (51), and the spray head (3) is fixedly connected to the toothed belt (53).

3. A concrete spraying device for tunnel inner wall according to claim 2, characterized in that: The slurry storage assembly comprises a slurry storage barrel (61) fixedly connected to the base (1), a stirring shaft (62) rotatably connected to the slurry storage barrel, a stirring blade (63) fixedly connected to the stirring shaft (62), and a hose (64) connecting the slurry storage barrel (61) and the spray head (3); a rotating shaft (65) fixedly connected to the power gear (51); and a transmission belt (66) is jointly sleeved on the stirring shaft (62) and the rotating shaft (65).

4. A concrete spraying device for tunnel inner wall according to claim 3, characterized in that: The hose (64) is fixedly connected to a symmetrically arranged clamping plate (7), the inner side wall of the clamping plate (7) is rotatably connected to a ball (71), and the clamping plate (7) slides on the arch support frame (2).

5. A concrete spraying device for tunnel inner wall according to claim 2, characterized in that: A scraper (8) is fixedly connected to the base (1), and the upper end of the scraper (8) contacts the toothed belt (53).

6. A concrete spraying device for tunnel inner wall according to any one of claims 1, 2 and 4, characterized in that: The shielding plate (9) is fixedly connected to the arched support frame (2), and the shielding plate (9) is arched.

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