A device for removing tunnel entrances

Abstract

This application discloses a tunnel portal removal device, including a positioning frame. The positioning frame is divided into several grid sections by several cross-shaped partitions. A support frame that slides back and forth is provided within each grid section. A sliding telescopic component is provided between the support frame and the grid section. A high-pressure pneumatic hammer is provided inside the support frame, with the hammer head extending out of the support frame. Several adjustable support legs are provided around the outer periphery of the positioning frame. The beneficial effects of this application are: High-efficiency operation: By using several (nine) independent high-pressure pneumatic hammers simultaneously or in batches, the efficiency of tunnel portal removal is greatly improved, and construction time is reduced; Precise removal: The hydraulic telescopic cylinder stroke can be automatically adjusted according to laser rangefinder data, and the high-pressure pneumatic hammer can deflect within a 15° range, ensuring the accuracy and uniformity of the removal.

Description

Technical Field

[0001] This application belongs to the field of tunnel construction technology, specifically relating to a tunnel portal removal device, which is suitable for the removal of tunnel portals in subway tunnels, underground engineering projects, etc. Background Technology

[0002] In the construction of subway tunnels and underground projects, portal excavation is a crucial and challenging construction procedure. Traditional portal excavation methods primarily rely on manual hand-held pneumatic drills, which have several drawbacks. First, manual operation is labor-intensive, inefficient, and prolonged high-intensity work can easily lead to worker fatigue, increasing safety risks. Second, the precision of manual excavation is difficult to guarantee, easily resulting in uneven excavation, over-excavation, or under-excavation, affecting the quality of the portal and the smooth progress of subsequent construction. Furthermore, the excavation process generates a large amount of dust and noise, posing serious hazards to the construction environment and the health of workers.

[0003] Therefore, developing an efficient, precise, safe, and environmentally friendly tunnel portal removal device is of great practical significance. Utility Model Content

[0004] The purpose of this application is to provide a tunnel portal removal device to solve the problems of high labor intensity, low efficiency, poor precision, and serious dust and noise pollution in existing tunnel portal removal methods, and ultimately achieve efficient, accurate, safe and environmentally friendly tunnel portal removal operations.

[0005] The objective of this application is achieved through the following technical solution: A hole-cutting device includes a positioning frame, the interior of which is divided into several grid sections by several cross-shaped partitions. A support frame that slides back and forth is provided in each grid section. A sliding telescopic component is provided between the support frame and the grid section. A high-pressure pneumatic pick is provided in the support frame, and the pick head at the front end of the high-pressure pneumatic pick extends out of the support frame. Several adjustable support legs are provided on the outer periphery of the positioning frame.

[0006] Furthermore, the positioning frame is a square frame, and the interior of the positioning frame is divided into a nine-square grid area by 2×2 partitions.

[0007] Furthermore, the partition can be detachably fixed to the positioning frame.

[0008] Furthermore, the sliding telescopic assembly is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is equipped with a telescopic displacement sensor.

[0009] Furthermore, the middle part of the high-pressure pneumatic pick is movably mounted in the support frame via a buffer assembly, and the rear end of the high-pressure pneumatic pick is mounted on a rotating support seat via a ball joint structure, with the rotating support seat located within the support frame.

[0010] Furthermore, the buffer assembly includes an annular damping sleeve and a compression spring assembly. The annular damping sleeve wraps around the outer periphery of the high-pressure jackhammer, and the compression spring assembly is symmetrically arranged on both sides of the high-pressure jackhammer. The compression spring assembly is connected between the support frame and the high-pressure jackhammer.

[0011] Furthermore, the rotating support is a miniature hydraulic rotary motor.

[0012] Furthermore, the adjustable support leg has four legs, which are respectively located at the upper left, upper right, lower left and lower right of the positioning frame.

[0013] Furthermore, the adjustable support leg is a hydraulic leveling support, and a pressure sensor is provided on the hydraulic leveling support.

[0014] Furthermore, a laser rangefinder is provided on the positioning frame.

[0015] Furthermore, the front end of the positioning frame is provided with an annular dust collection hood, and the bottom of the annular dust collection hood is connected to the negative pressure dust collection pipe.

[0016] The beneficial effects of this application are: 1. High-efficiency operation: By using several (nine) independent high-pressure pneumatic drills simultaneously or in batches, the efficiency of tunnel portal removal is greatly improved and construction time is reduced.

[0017] 2. Precise chiseling: The hydraulic telescopic cylinder stroke can be automatically adjusted according to the laser rangefinder data, and the high-pressure pneumatic hammer can deflect within a 15° range, ensuring the accuracy and uniformity of chiseling.

[0018] 3. Safe and reliable: Multi-directional buffer components reduce the impact of vibration on the equipment, the hydraulic leveling support of the adjustable support legs ensures the stability of the device, and the sequential start-up procedure reduces the impact during equipment startup, thus improving the safety and reliability of the equipment.

[0019] 4. Environmental protection and energy saving: The ring-shaped dust collection hood and negative pressure dust collection pipe effectively collect dust, reducing dust pollution. At the same time, the impact frequency of the pneumatic hammer can be dynamically adjusted according to vibration data, achieving energy-saving operation.

[0020] 5. High versatility: The partition adopts a quick-release plug-in structure and can be replaced with partition components of different layouts, which can adapt to the excavation of openings of different sizes and requirements.

[0021] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0022] Figure 1 This is the front structural isometric view of this application.

[0023] Figure 2 This is the rear view of the structural isometric view of this application.

[0024] In the diagram: 1-Positioning frame, 2-Grid section, 3-High-pressure pneumatic pick, 31-Pick head, 4-Support frame, 5-Sliding telescopic assembly, 51-Telescopic displacement sensor, 6-Buffer assembly, 61-Annular vibration damping sleeve, 62-Compression spring assembly, 7-Adjustable support leg, 71-Hydraulic leveling support, 72-Pressure sensor, 8-Rotating support seat, 81-Miniature hydraulic rotary motor, 10-Laser rangefinder, 11-Annular dust collection hood, 12-Negative pressure dust collection pipe. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0026] Example 1 refer to Figure 1 and Figure 2 As shown, a hole-door excavation device includes a positioning frame 1, a grid section 2, a high-pressure pneumatic hammer 3, a support frame 4, a sliding telescopic component 5, a buffer component 6, an adjustable support leg 7, a rotating support base 8, a laser rangefinder 10, an annular dust collection hood 11, and a negative pressure dust collection pipe 12.

[0027] The positioning frame 1 has a rectangular or circular structure, preferably welded from rigid steel plates, and serves as the main frame of the device for mounting or supporting other components. The front end of the positioning frame 1 is open to allow for forward chiseling operations, and the rear end of the positioning frame 1 is provided with a cover plate (not shown in the figure) to protect the internal components.

[0028] The positioning frame 1 is divided into several grid sections 2 by several cross-shaped partitions. The grid sections 2 form independent working areas. Within the grid sections 2, the opposite cross-sections can be chiseled. All the grid sections 2 cover the entire portal area. Through the division of working areas, it has the function of switching between independent operation and overall operation.

[0029] The grid section 2 is equipped with a support frame 4 that slides back and forth (along the direction of the portal normal). A sliding telescopic component 5 is provided between the support frame 4 and the grid section 2. A high-pressure pneumatic pick 3 is provided inside the support frame 4. The pick head 31 at the front end of the high-pressure pneumatic pick 3 extends out of the support frame 4. That is, by driving the sliding telescopic component 5, the support frame 4 and the high-pressure pneumatic pick 3 inside it can be driven to move back and forth, so as to change the forward extension position of the high-pressure pneumatic pick 3 and adjust the working depth.

[0030] The middle part of the high-pressure pneumatic pick 3 is movably mounted in the support frame 4 through the buffer component 6. The buffer component 6 realizes the movable support of the middle part of the high-pressure pneumatic pick 3. Firstly, the buffer component 6 can effectively buffer the vibration generated during the operation of the high-pressure pneumatic pick, reduce the impact on the overall structure of the device, and extend the service life of the equipment. Secondly, the movable support meets the needs of adjusting the working angle of the high-pressure pneumatic pick 3.

[0031] The rear end of the high-pressure pneumatic pick 3 is mounted on a rotating support 8 via a ball joint structure. The rotating support 8 is located within the support frame 4. The movement of the rotating support 8 drives the rear end of the high-pressure pneumatic pick 3 to rotate. Based on the movable placement of the high-pressure pneumatic pick 3 in the middle, the working angle of the high-pressure pneumatic pick 3 can be adjusted. The rotating support 8 allows the high-pressure pneumatic pick 3 to deflect within a 15° range, enabling the high-pressure pneumatic pick to adjust the chisel angle according to the actual situation of the tunnel entrance, improving the flexibility and accuracy of chiseling, and also meeting the needs of tilted tunnel entrances or rebar avoidance.

[0032] The outer periphery of the positioning frame 1 is provided with several adjustable support legs 7. The adjustable support legs 7 are used to support the inner wall of the tunnel or the portal platform outside the tunnel. The adjustable support legs 7 on the outer periphery work together to squeeze the positioning frame 1 inward, thereby fixing the positioning frame 1 at the tunnel portal. Then the high-pressure pneumatic drill 3 can perform forward chiseling based on the positioning frame 1.

[0033] The positioning frame 1 is a square frame, and its interior is divided into a nine-square grid 2 by 2×2 partitions. The partitions are detachably fixed to the positioning frame 1, allowing for flexible changes in the arrangement of the internal partitions to create different grid configurations. For example, a four-square grid can be created using 1×1 partitions, or a sixteen-square grid using 3×3 partitions. For a positioning frame 1 with one grid configuration, the partitions can be directly welded inside. For positioning frames with multiple grid configurations, bolt holes need to be pre-drilled at the corresponding positions, and the partitions are tightened after installation. The detachable and fixed partitions allow the device to be flexibly adjusted according to the size of different openings and excavation requirements, improving its versatility and applicability.

[0034] The sliding telescopic assembly 5 is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is equipped with a telescopic displacement sensor 51. The rotating support 8 is a miniature hydraulic rotary motor 81. That is, the adjustment of the working depth and angle is driven by hydraulic power. The monitoring value of the telescopic displacement sensor 51 can intuitively reflect the working depth.

[0035] The buffer assembly 6 includes an annular damping sleeve 61 and a compression spring assembly 62. The annular damping sleeve 61, preferably made of rubber, wraps around the outer periphery of the high-pressure jackhammer 3 to reduce the vibration transmitted from the high-pressure jackhammer 3 to the support frame 4. The compression spring assembly 62 is symmetrically arranged on both sides of the high-pressure jackhammer 3 and is fixedly connected between the support frame 4 and the high-pressure jackhammer 3 by bolts. The high-pressure jackhammer 3 mainly relies on the compression spring assembly 62 for movable support. The springs on both sides can both stably compress the high-pressure jackhammer 3 in the middle and allow the middle part of the high-pressure jackhammer 3 to swing.

[0036] The adjustable support legs 7 are four in number, located at the upper left, upper right, lower left, and lower right of the positioning frame 1, respectively. They symmetrically support the central positioning frame 1 from four directions, providing excellent stability. The adjustable support legs 7 are hydraulic leveling supports 71, which have a swing and telescopic function, allowing adjustment of the support angle and length. This enables automatic leveling of the positioning frame 1, ensuring the stability and installation accuracy of the device in different construction sites and adapting to irregular working surfaces. The hydraulic leveling support 71 is equipped with a pressure sensor 72 to detect the magnitude of the supporting force.

[0037] A laser rangefinder 10 is installed on the positioning frame 1 to detect the distance between the positioning frame 1 and the front section, and the working depth of the high-pressure pneumatic drill 3 is controlled by this distance. The propulsion stroke of each hydraulic cylinder is adjusted according to the data of the laser rangefinder 10, and the working status of the high-pressure pneumatic drill 3 in each grid section 2 is controlled independently or centrally.

[0038] The front end of the positioning frame 1 is equipped with an annular dust collection hood 11. During demolition work, the annular dust collection hood 11 can cover the opening to prevent dust generated during the operation from escaping, affecting the working environment and adversely affecting the health of the workers. The annular dust collection hood 11 includes an outer ring plate and a rear cover plate (not shown in the figure). The outer ring plate is fitted around the outer perimeter of the positioning frame 1 and welded in place. The rear cover plate is welded between the outer ring plate and the positioning frame 1, covering the gap between the outer ring plate and the positioning frame 1 to ensure the integrity of the shielding. The bottom of the annular dust collection hood 11 is connected to a negative pressure dust collection pipe 12. The dust generated during the operation eventually falls to the bottom of the dust collection hood and is then extracted from the working surface through the negative pressure dust collection pipe 12 for subsequent unified landfilling, effectively reducing dust pollution at the construction site and improving the construction environment.

[0039] The workflow for this application is as follows.

[0040] 1. Equipment Installation and Commissioning: Transport the equipment to the tunnel portal construction site and place the positioning frame in a suitable position in front of the tunnel portal using adjustable support legs; use hydraulic leveling supports and pressure sensors to level the positioning frame, ensuring it is in a horizontal and stable state; install displacement sensors and control valves for each hydraulic cylinder, start / stop switches for each high-pressure pneumatic drill, and laser rangefinders, and perform power-on testing to check if the equipment is operating normally; select appropriate partition components for installation according to the actual size of the tunnel portal and the excavation requirements, such as a nine-grid, four-grid, or sixteen-grid layout.

[0041] 2. Tunnel Portal Chiseling Operation: A laser rangefinder measures the distance between the positioning frame and the tunnel portal. Based on the measurement data, the propulsion stroke of each hydraulic cylinder is automatically adjusted to bring the high-pressure pneumatic drill head closer to the portal. Following a pre-stored sequential start-up program, the high-pressure pneumatic drills are started in batches according to the order of "center grid → four corner grids → four side grids." During the chiseling process, the vibration of the drill head is monitored in real time, and the impact frequency of the corresponding pneumatic drill is dynamically adjusted based on the vibration data to adapt to different chiseling conditions. Simultaneously, a micro hydraulic motor can drive the rotating base as needed, allowing the high-pressure pneumatic drill to deflect within a 15° range, adjusting the chiseling angle to ensure chiseling accuracy. An annular dust collection hood and negative pressure dust removal pipeline work synchronously to suck in and discharge the dust generated during the chiseling process, maintaining a clean construction site.

[0042] 3. Work Completion and Equipment Maintenance: After the tunnel entrance is cleared, stop all high-pressure pneumatic drills, retract the hydraulic cylinders, and remove the device from the tunnel entrance; clean and inspect the device, remove dust from the dust collection hood and negative pressure dust removal pipes, check for damage or wear on each component, and repair or replace as needed; store the device properly for future use.

[0043] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for excavating a tunnel entrance, comprising a positioning frame (1), characterized in that: The positioning frame (1) is divided into several grid sections (2) by several cross-shaped partitions. A support frame (4) that slides back and forth is provided in the grid section (2). A sliding telescopic component (5) is provided between the support frame (4) and the grid section (2). A high-pressure air pick (3) is provided in the support frame (4). The pick head (31) at the front end of the high-pressure air pick (3) extends out of the support frame (4). Several adjustable support legs (7) are provided on the outer periphery of the positioning frame (1).

2. The tunnel portal removal device according to claim 1, characterized in that: The positioning frame (1) is a square frame, and the interior of the positioning frame (1) is divided into a nine-square grid area (2) by a 2×2 partition.

3. The tunnel portal removal device according to claim 1 or 2, characterized in that: The partition is detachably fixed to the positioning frame (1).

4. The tunnel portal removal device according to claim 1, characterized in that: The sliding telescopic assembly (5) is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is equipped with a telescopic displacement sensor (51).

5. The tunnel portal removal device according to claim 1, characterized in that: The middle part of the high-pressure pneumatic pick (3) is movably mounted in the support frame (4) through the buffer assembly (6), and the rear end of the high-pressure pneumatic pick (3) is mounted on the rotating support seat (8) through the ball joint structure. The rotating support seat (8) is located in the support frame (4).

6. The tunnel portal removal device according to claim 5, characterized in that: The buffer assembly (6) includes an annular damping sleeve (61) and a compression spring assembly (62). The annular damping sleeve (61) wraps around the outer periphery of the high-pressure air hammer (3), and the compression spring assembly (62) is symmetrically arranged on both sides of the high-pressure air hammer (3). The compression spring assembly (62) is connected between the support frame (4) and the high-pressure air hammer (3).

7. The tunnel portal removal device according to claim 5, characterized in that: The rotating support base (8) is a miniature hydraulic rotary motor (81); the adjustable support leg (7) is a hydraulic leveling support (71), and a pressure sensor (72) is provided on the hydraulic leveling support (71).

8. The tunnel portal removal device according to claim 1, characterized in that: The adjustable support leg (7) has four legs, which are located at the upper left, upper right, lower left and lower right of the positioning frame (1).

9. The tunnel portal removal device according to claim 1, characterized in that: The positioning frame (1) is equipped with a laser rangefinder (10).

10. The tunnel portal removal device according to claim 1, characterized in that: The positioning frame (1) has an annular dust collection hood (11) at its front end, and the bottom of the annular dust collection hood (11) is connected to the negative pressure dust collection pipe (12).

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