Plasma cutting machine for preformed hole of tunnel arched steel frame

Abstract

The invention discloses a tunnel arched steel frame preformed hole plasma cutting machine which comprises a base, a supporting table is arranged on the upper side of the base, an arched steel frame is horizontally placed on the supporting table, a pair of supporting columns are arranged on the upper side of the base, a cross beam is arranged on the upper sides of the supporting columns, rectangular through holes are formed in the supporting columns, and the rectangular through holes are communicated with the supporting columns. A first air cylinder is arranged in the rectangular through hole, the telescopic end of the first air cylinder is connected with a limiting supporting part, a second air cylinder is arranged on the upper side of the cross beam, and the telescopic end of the second air cylinder penetrates through the cross beam and is connected with a cutting part. The invention relates to the technical field of tunnel lagging jack processing equipment, the cutting precision is high, the problem of non-uniform size / spacing is solved, the reserved hole spacing is strictly matched with a design drawing depending on digital programming and laser positioning technologies, experience errors caused by manual scribing are avoided, and uniform distribution of hole sites is realized.

Description

Plasma cutting machine for pre-reserved holes in tunnel arch steel frame Technical Field

[0001] This invention relates to the technical field of tunnel arch steel frame processing equipment, specifically a plasma cutting machine for pre-drilled holes in tunnel arch steel frames. Background Technology

[0002] Traditional methods for pre-cutting holes in tunnel arch steel frames involve manual cutting using gas cutting equipment, which presents the following technical challenges: uneven spacing between pre-cut holes. Traditional hole-cutting relies heavily on manual positioning based on experience or simple measuring tools, lacking a unified positioning benchmark and precise measuring equipment. Errors in operator work and placement deviations during arch frame fabrication can all lead to inaccurate spacing.

[0003] Uneven hole sizes, improper control of flame intensity and movement speed of the gas cutting gun by construction personnel during gas cutting operations, lack of standardized hole diameter limiting tools, and insufficient accuracy of hole diameter marking before gas cutting will also directly affect the hole diameter size after cutting, thus affecting the overall load-bearing capacity of the advanced support.

[0004] The irregularity around the pre-drilled holes affects the stress on the arch frame. During the gas cutting process, the excessively high flame temperature causes uneven melting of the steel in some areas, resulting in irregular edges after cooling. As the core load-bearing structure of tunnel support, the irregularity around the pre-drilled holes will cause stress concentration. When the arch frame is subjected to the pressure of the surrounding rock, the sharp edges and burrs will become weak points, which can easily lead to crack propagation. In severe cases, it may cause the arch frame to deform or even break, losing its support function.

[0005] The construction progress is slow, and the cutting process relies on manual step-by-step operations, which require the sequential completion of steps such as measurement, marking, positioning, and cutting. Each step has its own efficiency bottleneck due to manual operation. At the same time, due to the aforementioned dimensional deviation issues, rework (such as remarking and secondary cutting) is frequently required, further consuming construction time. The delayed arch frame processing progress will prevent the tunnel excavation face from obtaining timely advanced support, forcing a slowdown in excavation speed and affecting the overall construction period. Summary of the Invention

[0006] This invention aims to provide an arched steel frame processing equipment specifically for tunnel support, used for cutting pre-reserved holes on the arched steel frame.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plasma cutting machine for pre-drilled holes in a tunnel arched steel frame, comprising a base, a support platform on the upper side of the base, an arched steel frame for horizontal placement above the support platform, a pair of support columns on the upper side of the base, a crossbeam on the upper side of the support columns, a rectangular through hole on the support column, a first cylinder inside the rectangular through hole, a limit support connected to the telescopic end of the first cylinder, a second cylinder on the upper side of the crossbeam, the telescopic end of the second cylinder penetrating the crossbeam and connected to a cutting part;

[0008] The limiting support includes a lifting seat, a vertical plate on the upper side of the lifting seat, a first electric push rod on the upper side of the vertical plate, a first frame connected to the telescopic end of the first electric push rod, a first limiting wheel rotatably connected to the first frame, a second electric push rod on the lower side of the lifting seat, a pair of corresponding guide grooves on the lifting seat, an L-shaped frame on the upper side of the lifting seat, a slider corresponding to the guide groove on the lower side of the L-shaped frame, a connecting block on the lower side of the slider, the telescopic end of the second electric push rod connected to the connecting block, vertical grooves on both sides of the rectangular through hole, and one side of the lifting seat slidably connected to the vertical groove.

[0009] An assembly frame is provided on the upper side of the L-shaped frame, a drive wheel is rotatably connected to the assembly frame, a drive component is provided on the lower side of the assembly frame, a support rod is provided on the upper side of the L-shaped frame, a second frame is provided on the upper side of the support rod, and a second limit wheel is rotatably connected to the upper side of the second frame.

[0010] As a preferred embodiment of the above solution, the cutting section includes a cover, the upper side of which is connected to the output end of the second cylinder, an opening is provided on the upper side of the cover, a lead screw module is provided in front of the opening, a first guide rod is provided in rear of the opening, and a cutting device is slidably connected to the lead screw module and the first guide rod.

[0011] A third electric push rod is provided on both sides of the cover, and an adjustment frame is provided on both sides of the cover. The output end of the third electric push rod is connected to one side of the adjustment frame. A spring rod is rotatably connected to the lower side of the adjustment frame. A third frame is provided below the spring rod, and a third limit wheel is rotatably connected to the lower side of the third frame.

[0012] More preferably, the cutting device includes a movable frame, the lower side of which is slidably connected to the lead screw module and the first guide rod, and the upper side of the movable frame is provided with a CNC plasma cutting device, which is connected to a cutting head.

[0013] More preferably, a second guide rod is provided on both sides of the support column, and one side of the lifting seat is slidably connected to the second guide rod.

[0014] A further preferred embodiment is that a connecting piece is provided on the lower side of the support column, and the four corner portions of the connecting piece are connected to the base by bolts.

[0015] A further preferred embodiment is that a control device is provided on the front side of the support platform.

[0016] A further preferred embodiment is that a laser positioning device is provided on one side of the mobile frame.

[0017] More preferably, a third guide rod is provided on both the front and rear sides of the cover, and the front and rear sides of the movable frame are slidably connected to the third guide rod.

[0018] A further preferred embodiment is that a reinforcing rib is provided at the connection between the lower side of the vertical plate and the lifting seat.

[0019] A further preferred embodiment is that a collection box is provided on both sides of the cover, and an air pump is provided on one side of the collection box.

[0020] The beneficial effects of this invention are:

[0021] 1. High cutting precision, which solves the problem of uneven size / spacing. Relying on laser positioning and CNC technology, the reserved hole spacing strictly matches the design drawings, avoiding the experience error of manual scribing and achieving uniform hole distribution;

[0022] 2. The CNC plasma cutting device is used to complete the cutting operation, which has excellent cutting quality and ensures the safety of the arch frame under stress. The plasma arc energy is concentrated, and the uniform circular motion during the cutting process results in smooth and rounded cut edges without serrations or obvious burrs. No complicated subsequent grinding is required, and the high temperature affected area is small, which avoids local melting and deformation of the steel. The stress distribution around the reserved hole is uniform.

[0023] 3. High degree of automation, which greatly improves construction efficiency. There is no need for step-by-step measurement, marking, and repeated adjustments, which reduces manual intervention and rework. It can realize batch continuous processing and adapt to the progress requirements of tunnel construction.

[0024] 4. Easy to operate, reducing reliance on manual labor and costs. The limiting support and cutting parts work together to adapt to the arch frame flange structure. It can directly fit the arch frame and move without complicated fixing tools. A single person can complete the equipment debugging and cutting operation.

[0025] 5. High versatility, adaptable to processing needs in multiple scenarios. By modifying parameters, it can quickly adapt to the cutting of pre-reserved holes of different arch frame models and different hole diameters / spacings without the need to change special molds or tools, thus meeting the processing needs of various tunnel steel frames. Attached Figure Description

[0026] Figure 1 is a diagram showing the usage state of the present invention.

[0027] Figure 2 is a schematic diagram of the first partial structure of the present invention.

[0028] Figure 3 is a schematic diagram of the second partial structure of the present invention.

[0029] Figure 4 is a schematic diagram of the third partial structure of the present invention.

[0030] Figure 5 is a schematic diagram of the fourth partial structure of the present invention.

[0031] Figure 6 is a schematic diagram of the fifth partial structure of the present invention.

[0032] In the diagram: 1. Base, 2. Support platform, 3. Arched steel frame, 4. Support column, 5. Crossbeam, 6. First cylinder, 7. Second cylinder, 8. Lifting seat, 9. Vertical plate, 10. First electric push rod, 11. First frame, 12. First limit wheel, 13. Second electric push rod, 14. L-shaped frame, 15. Slider, 16. Connecting block, 17. Assembly frame, 18. Drive wheel, 19. Drive component, 20. Support rod, 21. Second frame, 22. Second limit wheel 23. Wheel, 24. Cover, 25. Lead screw module, 26. First guide rod, 27. Third electric push rod, 28. Adjusting frame, 29. Spring rod, 30. Third frame, 31. Third limit wheel, 32. Moving frame, 33. CNC plasma cutting device, 34. Cutting head, 35. Second guide rod, 36. Connecting piece, 37. Control device, 38. Laser positioning device, 39. Third guide rod, 40. Reinforcing rib, 41. Collection box, 42. Air pump. Detailed Implementation

[0033] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] As shown in Figures 1-6, a plasma cutting machine for pre-drilled holes in a tunnel arch steel frame includes a base 1, a support platform 2 on the upper side of the base 1, and an arch steel frame 3 placed horizontally above the support platform 2.

[0035] A pair of support columns 4 are provided on the upper side of the base 1. A crossbeam 5 is provided on the upper side of the support columns 4. A rectangular through hole is opened on the support column 4. A first cylinder 6 is provided inside the rectangular through hole. The telescopic end of the first cylinder 6 is connected to a limit support part. A second cylinder 7 is provided on the upper side of the crossbeam 5. The telescopic end of the second cylinder 7 passes through the crossbeam 5 and is connected to a cutting part.

[0036] The limiting support includes a lifting seat 8, a vertical plate 9 on the upper side of the lifting seat 8, a first electric push rod 10 on the upper side of the vertical plate 9, a first frame 11 connected to the telescopic end of the first electric push rod 10, a first limiting wheel 12 rotatably connected to the first frame 11, a second electric push rod 13 on the lower side of the lifting seat 8, a pair of corresponding guide grooves on the lifting seat 8, an L-shaped frame 14 on the upper side of the lifting seat 8, a slider 15 corresponding to the guide groove on the lower side of the L-shaped frame 14, a connecting block 16 on the lower side of the slider 15, the telescopic end of the second electric push rod 13 connected to the connecting block 16, vertical grooves are provided on the inner walls of both sides of the rectangular through hole, and one side of the lifting seat 8 is slidably connected to the vertical groove.

[0037] An assembly frame 17 is provided on the upper side of the L-shaped frame 14. A drive wheel 18 is rotatably connected to the assembly frame 17. A drive component 19 is provided on the lower side of the assembly frame 17. A support rod 20 is provided on the upper side of the L-shaped frame 14. A second frame 21 is provided on the upper side of the support rod 20. A second limit wheel 22 is rotatably connected to the upper side of the second frame 21.

[0038] The cutting section includes a cover 23, the upper side of which is connected to the output end of the second cylinder 7. An opening is provided on the upper side of the cover 23, a lead screw module 24 is provided in front of the opening, and a first guide rod 25 is provided in rear of the opening. The lead screw module 24 and the first guide rod 25 are slidably connected to the cutting device.

[0039] A third electric push rod 26 is provided on both sides of the cover 23, and an adjustment frame 27 is provided on both sides of the cover 23. The output end of the third electric push rod 26 is connected to one side of the adjustment frame 27. A spring rod 28 is rotatably connected to the lower side of the adjustment frame 27. A third frame 29 is provided on the lower side of the spring rod 28. A third limit wheel 30 is rotatably connected to the lower side of the third frame 29.

[0040] The cutting device includes a movable frame 31, the lower side of which is slidably connected to the lead screw module 24 and the first guide rod 25 respectively, and a CNC plasma cutting device 32 is provided on the upper side of the movable frame 31, and the CNC plasma cutting device 32 is connected to a cutting head 33.

[0041] First, the arched steel frame 3 is placed on the upper side of the support platform 2, and one end of the arched steel frame 3 is moved between the two support columns 4. Then, the first cylinder 6 can be controlled to run and drive the lifting seat 8 to rise. The rectangular through hole where the first cylinder 6 is located is provided with a vertical groove. With the second guide rod 34, the stability of the lifting seat 8 during the lifting process can be increased. Then, the lifting seat 8 and the components located on the upper side of the lifting seat 8 will move to the lower side of the arched steel frame 3, and the second limit wheel 22 will be in close contact with the lower side of the arched steel frame 3. Then, the first electric push rod 10 on the vertical plate 9 runs, and the first limit wheel 12 can be driven by the first frame 11 to be in close contact with the outer wall of the arched steel frame 3.

[0042] At the same time, the second electric push rod 13 operates, driving the L-shaped frame 14 to move through the connecting block 16 and the slider 15, so that the drive wheel 18 on the upper side of the L-shaped frame 14 is in close contact with the inner wall of the arched steel frame 3. At this time, the drive wheel 18, the first limiting wheel 12 and the second limiting wheel 22 can respectively limit the position of the left and right sides and the lower side of the arched steel frame 3. The drive wheel 18 is installed on the upper side of the L-shaped frame 14 through the assembly frame 17, and the lower side of the assembly frame 17 is provided with a drive component 19, which is connected to the drive wheel 18.

[0043] There are two limiting support parts composed of the above components. When the drive component 19 is running, the arched steel frame 3 can be moved by friction, and can be adjusted according to the drilling position. The drive wheel 18, the first limiting wheel 12 and the second limiting wheel 22 work together to ensure the overall stability of the arched steel frame 3.

[0044] After the required drilling position of the arched steel frame 3 corresponds to the position of the cutting head 33 of the CNC plasma cutting device 32, the laser positioning device 37 set on one side of the adjusting frame 27 can send a signal to the control device 36. At this time, the drive component 19 stops running, and the second cylinder 7 runs, driving the CNC plasma cutting device 32 to descend through the cover 23. During the descent, the third electric push rod 26 located on both sides of the cover 23 runs, driving the third frame 29 and the third limit wheel 30 to adjust through the adjusting frame 27, so that the third limit wheel 30 corresponds to the width of the arched steel frame 3. The third frame 29 is U-shaped, and the upper side of the third frame 29 is rotatably connected to the adjusting frame 27 through the spring rod 28. The angle can be changed when the third frame 29 is inserted into the upper side of the arched steel frame 3, ensuring that the third limit wheel 30 is in contact with the upper side of the arched steel frame 3, thereby increasing the stability of the cover 23, keeping the cover 23 and the arched steel frame 3 relatively fixed, and reducing drilling errors.

[0045] Subsequently, the second cylinder 7 continues to operate, while the lead screw module 24, the first guide rod 25, and the moving frame 31 work together to adjust the horizontal position of the CNC plasma cutting device 32, increasing the drilling accuracy. Then, the CNC plasma cutting device 32 can be used to drill and cut the arched steel frame 3. Collection boxes 40 are set on both sides of the cover 23, and a vacuum pump 41 is set on one side of the collection box 40. The collection box 40 is filled with purifying substances such as activated carbon, which can purify the harmful gases generated by the CNC plasma cutting device 32 during operation.

[0046] A control device 36 is provided on the front side of the support platform 2. The control device 36 is electrically connected to the first cylinder 6, the second cylinder 7, the first electric push rod 10, the second electric push rod 13, the third electric push rod 26, the drive component 19, the CNC plasma cutting device 32, and the laser positioning device 37. The connection method and the cooperation between the above components are well known to those skilled in the art, and therefore will not be described in detail.

[0047] A connecting piece 35 is provided on the lower side of the support column 4. The four corners of the connecting piece 35 are connected to the base 1 by bolts. The connecting piece 35 can be separated from the base 1 and connected to the movable base 1. During operation, the movable base 1 can be controlled to move along the arched steel frame 3. The overall use is flexible. The front and rear sides of the cover 23 are provided with third guide rods 38. The front and rear sides of the movable frame 31 are slidably connected to the third guide rods 38 to increase the stability of the movable frame 31. A reinforcing rib 39 is provided at the connection between the lower side of the vertical plate 9 and the lifting seat 8 to increase the connection strength between the two.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame, comprising a base (1), characterized in that, A support platform (2) is provided on the upper side of the base (1). An arched steel frame (3) is placed horizontally above the support platform (2). A pair of support columns (4) are provided on the upper side of the base (1). A crossbeam (5) is provided on the upper side of the support columns (4). A rectangular through hole is provided on the support column (4). A first cylinder (6) is provided inside the rectangular through hole. The telescopic end of the first cylinder (6) is connected to a limit support part. A second cylinder (7) is provided on the upper side of the crossbeam (5). The telescopic end of the second cylinder (7) passes through the crossbeam (5) and is connected to a cutting part. The limit support part includes a lifting seat (8). A vertical plate (9) is provided on the upper side of the lifting seat (8). A first electric push rod (10) is provided on the upper side of the vertical plate (9). The telescopic end of the first electric push rod (10) is connected to a first frame (11). A first limit wheel (12) is rotatably connected to the first frame (11). The lower side of the lifting seat (8) A second electric push rod (13) is provided. A pair of corresponding guide grooves are provided on the lifting seat (8). An L-shaped frame (14) is provided on the upper side of the lifting seat (8). A slider (15) corresponding to the guide groove is provided on the lower side of the L-shaped frame (14). A connecting block (16) is provided on the lower side of the slider (15). The telescopic end of the second electric push rod (13) is connected to the connecting block (16). Vertical grooves are provided on both sides of the rectangular through hole. One side of the lifting seat (8) is slidably connected to the vertical groove. An assembly frame (17) is provided on the upper side of the L-shaped frame (14). A drive wheel (18) is rotatably connected on the assembly frame (17). A drive component (19) is provided on the lower side of the assembly frame (17). A support rod (20) is provided on the upper side of the L-shaped frame (14). A second frame (21) is provided on the upper side of the support rod (20). A second limit wheel (22) is rotatably connected on the upper side of the second frame (21).

2. The plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 1, characterized in that, The cutting section includes a cover (23), the upper side of which is connected to the output end of the second cylinder (7). An opening is provided on the upper side of the cover (23), a lead screw module (24) is provided in front of the opening, and a first guide rod (25) is provided behind the opening. The lead screw module (24) and the first guide rod (25) are slidably connected to a cutting device. A third electric push rod (26) is provided on both sides of the cover (23), and an adjustment frame (27) is provided on both sides of the cover (23). The output end of the third electric push rod (26) is connected to one side of the adjustment frame (27). A spring rod (28) is rotatably connected to the lower side of the adjustment frame (27). A third frame (29) is provided on the lower side of the spring rod (28), and a third limit wheel (30) is rotatably connected to the lower side of the third frame (29).

3. The plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 2, characterized in that, The cutting device includes a movable frame (31), the lower side of which is slidably connected to the lead screw module (24) and the first guide rod (25), and the upper side of the movable frame (31) is provided with a CNC plasma cutting device (32), which is connected to a cutting head (33).

4. The plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 1, characterized in that, The support column (4) is provided with a second guide rod (34) on both sides, and the lifting seat (8) is slidably connected to the second guide rod (34) on one side.

5. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 1, characterized in that, A connecting piece (35) is provided on the lower side of the support column (4), and the four corners of the connecting piece (35) are connected to the base (1) by bolts.

6. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 1, characterized in that, A control device (36) is provided on the front side of the support platform (2).

7. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 3, characterized in that, A laser positioning device (37) is provided on one side of the mobile frame (31).

8. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 3, characterized in that, The cover (23) is provided with a third guide rod (38) on both the front and rear sides, and the movable frame (31) is slidably connected to the third guide rod (38) on both the front and rear sides.

9. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 1, characterized in that, A reinforcing rib (39) is provided at the connection between the lower side of the vertical plate (9) and the lifting seat (8).

10. A plasma cutting machine for pre-drilled holes in a tunnel arch steel frame according to claim 2, characterized in that, Collection boxes (40) are provided on both sides of the cover (23), and an air pump (41) is provided on one side of the collection box (40).

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