TBM (Tunnel Boring Machine) spraying and mixing device

Abstract

The utility model relates to the technical field of tunneling equipment, in particular to a TBM spraying and mixing device. The TBM spraying and mixing device comprises a spraying and mixing bridge, a supporting frame and a rotating trolley. The supporting frame is arranged on the spraying and mixing bridge in the length direction of the spraying and mixing bridge in a sliding mode. The rotating trolley comprises a frame, a spray head, an adjusting assembly and a driving assembly, the frame is rotationally arranged on the supporting frame, the adjusting assembly is arranged on the frame, the spray head is arranged on the adjusting assembly, the adjusting assembly is used for adjusting the height of the spray head on the frame, and the driving assembly is arranged on the frame to drive the frame to rotate in the circumferential direction of the supporting frame. According to the TBM spraying and mixing device, the adaptability of the spraying and mixing device to the large tunnel reducing size is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tunneling equipment, and in particular to a TBM spray-mixing device. Background Art

[0002] The excavation of long-distance and large-diameter tunnels in medium-hard rock and hard rock formations mostly uses full-section hard rock tunnel boring machines, referred to as TBMs. As an important part of TBM support operations, the spray-mix system sprays concrete on the surface of the tunnel wall after TBM excavation to seal the surrounding rock and protect the safety of personnel and equipment, ensuring rapid excavation and safe construction of TBMs.

[0003] The current spray-mixing system includes a spray-mixing bridge, a support frame, a rotating trolley and a spray head. A frame track extending in the axial direction is fixedly set on the spray-mixing bridge, and the support frame moves horizontally through the track on the spray-mixing bridge. The spray head is set on the rotating trolley, and the spray head can spray concrete. While the rotating trolley makes circumferential motion on the track of the support frame, the support frame can move axially along the frame slideway driven by the driving device, and the spray head also moves axially synchronously to complete the spray-mixing operation.

[0004] In order to ensure the quality of spray mixing and control the rebound rate of the TBM spray mixing system, the distance between the nozzle and the tunnel wall generally needs to be controlled within a limited range of movement, which places high requirements on the positioning of the nozzle. Conventional spray mixing devices are difficult to adapt to the spray mixing needs of tunnels with larger variable diameters. Utility Model Content

[0005] The present application provides a TBM spray mixing device, which is used to solve the problem that conventional spray mixing devices are difficult to adapt to the spray mixing needs of tunnels with variable diameters and larger sizes.

[0006] The present application provides a TBM spray-mixing device, comprising a spray-mixing bridge, a support frame and a rotating trolley, wherein the support frame is slidably arranged on the spray-mixing bridge along the length direction of the spray-mixing bridge;

[0007] The rotating trolley includes a frame, a nozzle, an adjustment assembly and a drive assembly. The frame is rotatably arranged on the support frame, the adjustment assembly is arranged on the frame, the nozzle is arranged on the adjustment assembly, the adjustment assembly is used to adjust the height of the nozzle on the frame, and the drive assembly is arranged on the frame to drive the frame to rotate circumferentially along the support frame.

[0008] In some embodiments, the support frame is a circular ring, and the support frame is inserted on the spray-mix bridge.

[0009] In some embodiments, the adjustment assembly includes a fixing member and a plurality of fixing plates, wherein the plurality of fixing plates are arranged on the frame in a single row along a height direction of the frame, and the fixing member is used to fix the nozzle on any of the fixing plates.

[0010] In some embodiments, the fixing plate is provided with a plurality of fixing holes, the fixing holes are arranged along the height direction of the frame, and the fixing member passes through the fixing holes to fix the nozzle on the fixing plate.

[0011] In some embodiments, the supporting frames are provided in two numbers, both of the supporting frames are slidably provided on the spray-mixing bridge, and both of the supporting frames are provided with a rotating trolley.

[0012] In some embodiments, the adjustment assembly further comprises a counterweight block, which is detachably connected to the frame to balance the center of gravity of the frame.

[0013] In some embodiments, the driving assembly includes a driving member, which is disposed on the frame and abuts against the supporting frame to drive the frame to rotate around the supporting frame.

[0014] In some embodiments, the driving assembly further includes a plurality of guide wheels, which are evenly rotatably arranged on both sides of the frame, and the guide wheels are all in contact with the support frame.

[0015] In some embodiments, a protective cover is provided on the frame, and the protective cover is used to shield the driving member.

[0016] In some embodiments, the TBM spray-mixing device also includes a plurality of walking components, wherein the walking components include a leg frame and a walking member, wherein the leg frame is arranged at the bottom of the spray-mixing bridge to support the spray-mixing bridge, and the height of the leg frame is adjustable, and the walking member is arranged at the bottom of the leg frame to move the leg frame.

[0017] A TBM spray mixing device provided in the present application is arranged through an adjustment component and a drive component. When in use, the position of the nozzle on the frame is adjusted by the adjustment component so that the distance from the nozzle to the tunnel wall is within a limited range, thereby maintaining the spray mixing quality and controlling the rebound rate; by arranging multiple fixed plates, the adjustment range of the nozzle installation position is increased to meet the spray mixing needs of tunnels with larger variable diameters; at the same time, the setting of the counterweight block balances the center of gravity of the rotating trolley after the nozzle position is changed, so as to facilitate the balance and rotation of the rotating trolley; further, through the setting of the walking component, the height of the spray mixing bridge is adjusted, so that the center height of the support frame is changed according to the change of the tunnel diameter, so that the center of the support frame coincides with the center of the tunnel wall, so that during the rotation of the rotating trolley, the distance between the nozzle and the tunnel wall is always kept constant, further improving the spray mixing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 A schematic diagram of the structure of a TBM spray mixing device provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 The structural diagram of the middle rotating trolley;

[0021] Figure 3 for Figure 1 Structural diagram of the middle fixed plate;

[0022] Figure 4 for Figure 1 The structural diagram of the walking component;

[0023] Figure 5 for Figure 1 Schematic diagram of the structure of the TBM spray-mixing device after the diameter of the middle tunnel is changed Figure 1 ;

[0024] Figure 6 for Figure 1 Schematic diagram of the structure of the TBM spray-mixing device after the diameter of the middle tunnel is changed Figure 2 .

[0025] Description of reference numerals:

[0026] 100-Spray-mix bridge;

[0027] 200-support frame;

[0028] 300-rotating trolley; 310-frame; 311-protective cover; 320-sprinkler; 330-adjusting assembly; 331-fixing plate; 3311-fixing hole; 332-counterweight block; 340-driving assembly; 341-guide wheel; 342-driving member;

[0029] 400-travel assembly; 410-leg support; 420-travel member; 430-support column.

[0030] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] The excavation of long-distance and large-diameter tunnels in medium-hard and hard rock formations mostly uses full-face hard rock tunnel boring machines, or TBMs for short. As an important part of TBM support operations, the spray-mix system sprays concrete on the tunnel wall surface after TBM excavation to seal the surrounding rock and protect the safety of personnel and equipment, ensuring rapid excavation and safe construction of TBMs.

[0036] The current spray-mixing system includes a spray-mixing bridge, a support frame, a rotating trolley and a spray head. A frame track extending in the axial direction is fixedly set on the spray-mixing bridge, and the support frame moves horizontally through the track on the spray-mixing bridge. The spray head is set on the rotating trolley, and the spray head is connected to the external concrete injection pipeline. The spray head can spray concrete. While the rotating trolley makes circumferential motion on the track of the support frame, the support frame can move axially along the frame slideway driven by the driving device, and the spray head also moves axially synchronously to complete the spray-mixing operation.

[0037] In order to ensure the quality of spray mixing and control the rebound rate of TBM spray mixing system, the distance between the nozzle and the tunnel wall is generally controlled within a limited moving range, that is, between 1000mm and 1200mm. The positioning of the nozzle is required to be high, while the radial moving stroke of conventional spray mixing devices generally does not exceed 500mm, which is difficult to adapt to the spray mixing needs of tunnels with larger variable diameters.

[0038] In order to solve the above problems, the present application provides a TBM spray mixing device, which is arranged through an adjustment component and a drive component. When in use, the position of the nozzle on the frame is adjusted by the adjustment component so that the distance from the nozzle to the tunnel wall is within a limited range, thereby maintaining the spray mixing quality and controlling the rebound rate; by setting a plurality of fixed plates, the adjustment range of the nozzle installation position is increased to meet the spray mixing needs of tunnels with larger variable diameters; at the same time, the setting of the counterweight block balances the center of gravity of the rotating trolley after the nozzle position is changed, so as to facilitate the balance and rotation of the rotating trolley; further, through the setting of the walking component, the height of the spray mixing bridge is adjusted, so that the center height of the support frame is changed according to the change of the tunnel diameter, so that the center of the support frame coincides with the center of the tunnel wall, so that during the rotation of the rotating trolley, the distance between the nozzle and the tunnel wall is always kept constant, further improving the spray mixing quality.

[0039] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] The present application provides a TBM spray mixing device, referring to Figures 1 to 6 The TBM spray-mixing device includes a spray-mixing bridge 100, a support frame 200 and a rotating trolley 300. The support frame 200 is slidably arranged on the spray-mixing bridge 100 along the length direction of the spray-mixing bridge 100, and the rotating trolley 300 is rotatably arranged on the support frame 200 along the circumferential direction of the support frame 200.

[0041] The rotating trolley 300 includes a frame 310, a nozzle 320, an adjustment assembly 330 and a drive assembly 340. The frame 310 is rotatably arranged on the support frame 200, the adjustment assembly 330 is arranged on the frame 310, the nozzle 320 is arranged on the adjustment assembly 330, the adjustment assembly 330 is used to adjust the height of the nozzle 320 on the frame 310, and the drive assembly 340 is arranged on the frame 310 to drive the frame 310 to rotate circumferentially along the support frame 200.

[0042] By adopting the above embodiment, the position of the nozzle 320 on the frame 310 is adjusted by the adjustment component 330 so that the distance from the nozzle 320 to the cave wall is maintained within a limited range, and the frame 310 is driven to rotate on the support frame 200 by the drive component 340 to drive the nozzle 320 to rotate in the circumferential direction toward the cave wall, thereby maintaining the spray mixing quality and controlling the rebound rate.

[0043] The support frame 200 is a circular ring, and the support frame 200 is inserted on the spray-mix bridge 100 .

[0044] Among them, the spray-mix bridge 100 can move forward and backward along the axial direction of the support frame 200. A frame track extending along the axial direction of the support frame 200 is fixedly arranged on the spray-mix bridge 100. The support frame 200 is slidably connected to the frame track, so that the support frame 200 can move along the frame track.

[0045] In some embodiments, reference Figure 2 and Figure 3 The adjustment assembly 330 includes a fixing member and a plurality of fixing plates 331 . The plurality of fixing plates 331 are arranged on the frame 310 in a single row along the height direction of the frame 310 . The fixing member is used to fix the nozzle 320 on any of the fixing plates 331 .

[0046] Specifically, the fixing plates 331 are welded and fixed to the vehicle frame 310 , and a plurality of fixing plates 331 are located in the same diameter direction of the supporting frame 200 .

[0047] Among them, in this application, the fixing member is a bolt, and the bolt is used to fix the nozzle 320 on the fixing plate 331. At the same time, the nozzle 320 is connected to the external concrete injection pipe, which is a prior art and will not be described in detail here.

[0048] By adopting the above technical solution, the position of the nozzle 320 is changed by installing the nozzle 320 on different fixing plates 331, so that the distance between the nozzle 320 and the tunnel wall is maintained within an appropriate range, and the number of fixing plates 331 is not limited. Therefore, the adjustment range of the nozzle 320 is larger to adapt to tunnels with larger variable diameters.

[0049] Furthermore, a plurality of fixing holes 3311 are formed on the fixing plate 331 . The fixing holes 3311 are arranged along the height direction of the vehicle frame 310 . The fixing members pass through the fixing holes 3311 to fix the nozzle 320 on the fixing plate 331 .

[0050] By adopting the above technical solution, the fixing holes 3311 are arranged along the diameter direction of the support frame 200, that is, the fixing holes 3311 are arranged along the length direction of the fixing plate 331. When installing the nozzle 320, the position of the nozzle 320 can be fine-tuned by selecting different fixing holes 3311 on the fixing plate 331, so that the distance between the nozzle 320 and the cave wall is more in line with the requirements.

[0051] Among them, the fixing hole 3311 is a strip-shaped hole.

[0052] The fixing hole 3311 in the form of a strip hole is conducive to moving the position of the bolt when installing the nozzle 320. While facilitating installation, the position of the nozzle 320 can be further adjusted to improve the adjustment effect.

[0053] In some embodiments, reference Figure 1 , two fixing plates 331 are provided. In other embodiments, the number of fixing plates 331 is not limited, and fixing plates 331 can be welded on the frame 310 at any time to increase the range of position adjustment of the nozzle 320, so that the installation position of the nozzle 320 meets the spray mixing requirements.

[0054] There are two support frames 200 , and both of the two support frames 200 are slidably arranged on the spray-mix bridge 100 . Both of the two support frames 200 are provided with a rotating trolley 300 .

[0055] In some embodiments, reference Figure 2 and Figure 3The adjustment assembly 330 also includes a counterweight block 332 , which is detachably connected to the frame 310 to balance the center of gravity of the frame 310 .

[0056] Specifically, the counterweight 332 is also connected to the fixing plate 331, and the counterweight 332 is fixed by bolts passing through the fixing holes 3311 on the fixing plate 331. Thus, by selecting the installation position of the counterweight 332, the center of gravity of the rotating trolley 300 can be adjusted to be located in the middle of the rotating trolley 300 to maintain the stability of the rotating action.

[0057] In some embodiments, reference Figure 2 and Figure 3 The driving assembly 340 includes a driving member 342 , which is disposed on the frame 310 and abuts against the supporting frame 200 to drive the frame 310 to rotate around the supporting frame 200 .

[0058] The driving member 342 is a hydraulic electrical reel, which drives the frame 310 to rotate around the support frame 200. In other embodiments, the driving member 342 can also be a motor gear structure, as long as it can realize the rotation of the frame 310, and no excessive restrictions are made here. Figure 1 and Figure 2 A protective cover 311 is provided on the frame 310 , and the protective cover 311 is used to shield the driving member 342 .

[0059] The protective cover 311 is welded and fixed to the top of the frame 310 and is located above the driving member 342 to shield the driving member 342 and prevent concrete or other objects from falling onto the driving member 342 and affecting the normal use of the driving member 342.

[0060] The driving assembly 340 further includes a plurality of guide wheels 341 , which are evenly rotatably disposed on both sides of the frame 310 , and the guide wheels 341 are all in contact with the support frame 200 .

[0061] Furthermore, the frame 310 is a U-shaped structure, the frame 310 is mounted on the support frame 200, and the driving member 342 and the nozzle 320 are respectively located on both sides of the frame 310 to balance the center of gravity of the frame 310 so that the center of gravity is located on the support frame 200 to ensure the stability of rotation.

[0062] Furthermore, two guide wheels 341 are provided, and the two guide wheels 341 are respectively located at two opposite inner sides of the frame 310 , and the two guide wheels 341 are both in contact with the outer side wall of the support frame 200 to roll on the outer side wall of the support frame 200 .

[0063] In some embodiments, reference Figure 1 and Figure 4The TBM spray-mixing device also includes a plurality of walking assemblies 400, and the walking assemblies 400 include a leg frame 410 and a walking member 420. The leg frame 410 is arranged at the bottom of the spray-mixing bridge 100 to support the spray-mixing bridge 100. The height of the leg frame 410 is adjustable, and the walking member 420 is arranged at the bottom of the leg frame 410 to move the leg frame 410.

[0064] There are at least two traveling assemblies 400 , and the spray-mix bridge 100 is fixed on the plurality of traveling assemblies 400 to support the spray-mix bridge 100 .

[0065] Furthermore, the walking member 420 is a roller and a driving device thereof, which is a prior art and will not be described in detail herein.

[0066] In some embodiments, reference Figure 4 , Figure 5 and Figure 6 The walking assembly 400 also includes a plurality of support columns 430, and the heights of the support columns 430 are all different. The leg frame 410 can be detachably connected to any one of the support columns 430, and the walking member 420 can be detachably connected to the bottom of the support column 430. The leg frame 410 is connected to the support columns 430 of different heights to adjust the center of the support frame 200 to coincide with the center of the hole wall.

[0067] The support column 430 is connected between the leg frame 410 and the walking member 420 by bolts, so that the support column 430 is detachable. After the tunnel diameter is changed, the height of the spray-mix bridge 100 is changed by replacing the support columns 430 of different heights, so as to adjust the center of the support frame 200 to coincide with the center of the tunnel wall, so that the nozzle 320 on the rotating trolley 300 always keeps the distance between the tunnel wall within a suitable range during the rotation process.

[0068] The TBM spray mixing device provided by the present application is arranged by means of an adjustment component 330 and a drive component 340. When in use, the position of the nozzle 320 on the frame 310 is adjusted by the adjustment component 330 so that the distance from the nozzle 320 to the tunnel wall is within a limited range, thereby maintaining the spray mixing quality and controlling the rebound rate; by setting a plurality of fixing plates 331, the adjustment range of the installation position of the nozzle 320 is increased to meet the spray mixing requirements of tunnels with larger variable diameters; at the same time, the setting of the counterweight block 332 balances the spray mixing. After the position of the head 320 is changed, the center of gravity of the rotating trolley 300 is adjusted to facilitate the balance and rotation of the rotating trolley 300; further, through the setting of the walking component 400, the height of the spray-mix bridge 100 is adjusted, so that the height of the center of the support frame 200 is changed according to the change of the tunnel diameter, so that the center of the support frame 200 coincides with the center of the tunnel wall, and then during the rotation of the rotating trolley 300, the distance between the nozzle 320 and the tunnel wall is always kept constant, further improving the spray-mix quality.

[0069] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0070] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A TBM spray mixing device, characterized in that: It comprises a spray-mix bridge (100), a support frame (200) and a rotating trolley (300), wherein the support frame (200) is slidably arranged on the spray-mix bridge (100) along the length direction of the spray-mix bridge (100); The rotating trolley (300) comprises a frame (310), a nozzle (320), an adjustment assembly (330) and a driving assembly (340); the frame (310) is rotatably arranged on the supporting frame (200); the adjustment assembly (330) is arranged on the frame (310); the nozzle (320) is arranged on the adjustment assembly (330); the adjustment assembly (330) is used to adjust the height of the nozzle (320) on the frame (310); and the driving assembly (340) is arranged on the frame (310) to drive the frame (310) to rotate circumferentially along the supporting frame (200).

2. The TBM spray mixing device according to claim 1, characterized in that: The support frame (200) is a circular ring, and the support frame (200) is inserted on the spray-mix bridge (100).

3. The TBM spray mixing device according to claim 1, characterized in that: The adjustment assembly (330) comprises a fixing member and a plurality of fixing plates (331); the plurality of fixing plates (331) are arranged in a single row on the frame (310) along the height direction of the frame (310); and the fixing member is used to fix the spray head (320) on any of the fixing plates (331).

4. The TBM spray mixing device according to claim 3, characterized in that: The fixing plate (331) is provided with a plurality of fixing holes (3311), the fixing holes (3311) are arranged along the height direction of the vehicle frame (310), and the fixing member passes through the fixing holes (3311) to fix the nozzle (320) on the fixing plate (331).

5. The TBM spray mixing device according to claim 4, characterized in that: The supporting frames (200) are provided in two numbers, and the two supporting frames (200) are both slidably arranged on the spray-mixing bridge (100), and the two supporting frames (200) are both provided with a rotating trolley (300).

6. The TBM spray mixing device according to claim 2, characterized in that: The adjustment assembly (330) further comprises a counterweight (332), wherein the counterweight (332) is detachably connected to the frame (310) to balance the center of gravity of the frame (310).

7. The TBM spray mixing device according to any one of claims 1 to 6, characterized in that: The driving assembly (340) comprises a driving member (342), wherein the driving member (342) is arranged on the vehicle frame (310) and abuts against the support frame (200) so as to drive the vehicle frame (310) to rotate around the support frame (200).

8. The TBM spray mixing device according to claim 7, characterized in that: The driving assembly (340) further comprises a plurality of guide wheels (341), wherein the guide wheels (341) are evenly rotatably arranged on both sides of the vehicle frame (310), and the guide wheels (341) are all in contact with the support frame (200).

9. The TBM spray mixing device according to claim 7, characterized in that: The vehicle frame (310) is provided with a protective cover (311), and the protective cover (311) is used to shield the driving member (342).

10. The TBM spray mixing device according to any one of claims 1 to 6, characterized in that: The invention also comprises a plurality of walking assemblies (400), wherein the walking assemblies (400) comprise a leg frame (410) and a walking member (420), wherein the leg frame (410) is arranged at the bottom of the spray-mix bridge (100) to support the spray-mix bridge (100), and the height of the leg frame (410) is adjustable, and the walking member (420) is arranged at the bottom of the leg frame (410) to move the leg frame (410).

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