An adjustable multifunctional rear support device for a tunnel boring machine

Abstract

The present invention belongs to the technical field of coal mine excavation support, and is specifically an adjustable multifunctional rear support device for a tunnel boring machine. It includes a left support plate, a right support plate and a connecting frame. The left support plate and the right support plate are connected to a support seat through a left support leg oil cylinder and a right support leg oil cylinder respectively. A trapezoidal running track that can slide back and forth on the support seat is installed on the support seat. The front end of the trapezoidal running track is fixedly connected to the front lower part of the connecting frame. Bolt holes are left at the front and rear ends of the connecting frame to connect the head and tail of the tunnel boring machine frame. The top support at the rear end of the trapezoidal running track is connected to the supporting cylinder through a pin shaft, and the other end of the supporting cylinder is connected to the rear end of the connecting frame through a pin shaft; a left telescopic oil cylinder and a right telescopic oil cylinder are also connected between the support seat and the front end of the connecting frame. The present invention can not only bear the dead weight of the equipment and reduce the vibration load, but also can make the rear of the scraper conveyor or belt loader tilt up, thereby ensuring the reliability of the mechanical structure and the working efficiency of the mechanical equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine excavation support, in particular to an adjustable multifunctional rear support device for a tunneling machine. Background Art

[0002] Due to the harsh working environment in coal mines and the complex and changeable geological conditions underground, the adaptability requirements of tunnel boring machines are getting higher and higher. Only by improving the overall performance of the tunnel boring machine can the requirements of the rapid development of tunnel boring machine mechanization be met. The tunnel boring machine is mainly composed of the cutting part, loading part, transportation part, walking part, frame, electrical and hydraulic control part, etc. Each part complements each other, and the performance of the tunnel boring machine is determined by the performance of each part. As one of the important mechanical equipment in the comprehensive excavation working face, the cantilever tunnel boring machine has important significance for the study of its working performance. As the main body of the tunnel boring machine, the frame affects the working performance of the entire tunnel boring machine. The rear support part, as one of the important components of the frame, connects the working mechanism of the tunnel boring machine and its supporting equipment, and plays an important role in connecting the upper and lower parts. Its front end is connected to the main body of the tunnel boring machine and constitutes a part of the whole machine structure; the lower end is provided with a support (support leg) to support the whole equipment when the equipment is working normally, reducing the vibration and slippage of the whole machine; its upper end is connected to the first conveyor to support the first conveyor to complete the material transportation; the rear end is provided with a second conveyor turntable to connect the second conveyor to complete the material transfer function. The rationality of the rear support structure design and the stability of the working mechanism directly affect the working performance of the whole machine. Studying the structural form of the rear support of the tunnel boring machine can improve the working performance of the tunnel boring machine, improve the design scheme of the tunnel boring machine, improve the design quality of the tunnel boring machine, and shorten the design cycle of the tunnel boring machine, which plays an important role in guiding the safe use of the tunnel boring machine.

[0003] As the working mechanism of the tunnel boring machine, the support not only bears the weight of the equipment, but also bears the vibration load during normal operation. For the whole machine, it plays a role in buffering and absorbing vibration, reducing the damage of vibration load to the walking part and other parts of the tunnel boring machine, and preventing slippage, avoiding the equipment from sliding backward or sideways during operation. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an adjustable multifunctional rear support device for a tunnel boring machine.

[0005] The present invention adopts the following technical scheme: an adjustable multifunctional rear support device for a tunnel boring machine, comprising a left support plate, a right support plate and a connecting frame, the left support plate and the right support plate are respectively connected to a support seat through a left support leg cylinder and a right support leg cylinder, a trapezoidal running track that can slide back and forth on the support seat is installed on the support seat, the front end of the trapezoidal running track is fixedly connected to the front end lower part of the connecting frame, bolt holes are respectively left at the front and rear ends of the connecting frame to connect the head and tail of the tunnel boring machine frame body, the top support at the rear end of the trapezoidal running track is connected to the supporting cylinder through a pin shaft, and the other end of the supporting cylinder is connected to the rear end of the connecting frame through a pin shaft; a left telescopic cylinder and a right telescopic cylinder are also connected between the support seat and the front end of the connecting frame.

[0006] Furthermore, the left supporting leg cylinder is provided with three groups, including left supporting leg cylinder I, left supporting leg cylinder II and left supporting leg cylinder III; the right supporting leg cylinder is provided with three groups, including right supporting leg cylinder I, right supporting leg cylinder II and right supporting leg cylinder III.

[0007] Furthermore, the connecting frame is a frame structure, a steel plate is provided at the front end of the connecting frame, the middle part of the steel plate is hinged to the left telescopic cylinder and the right telescopic cylinder through connecting ears, and the rear part of the connecting frame is hinged to the supporting cylinder through connecting ears.

[0008] Furthermore, a pin shaft connecting end is provided at the front end of the trapezoidal running track, a pin hole is provided on the pin shaft connecting end, trapezoidal sliding blocks are symmetrically provided on both sides of the trapezoidal running track, the sliding blocks are cooperatively connected with the support seats, and a connecting ear I connected to the supporting cylinder is provided at the top of the rear end of the trapezoidal running track.

[0009] Furthermore, the support seat is a rectangular box structure, and connecting ears II for connecting to the left and right supporting leg cylinders are arranged on both sides of the rectangular box, and a groove body with the same shape and size as the trapezoidal running track cross-section is arranged in the middle of the rectangular box.

[0010] A method for using an adjustable multifunctional rear support device for a roadheader. Under normal working conditions, a connecting frame and a support seat are in a fitted state, and a support oil cylinder is in a normal contracted state. When the geological conditions in the coal mine are relatively soft, when the roadheader is cutting coal and rock, the left and right support plates will sink due to the influence of the deadweight of the machine body and the gravity of the coal and rock on the scraper conveyor, thereby causing the height of the rear part of the machine to decrease. When the left and right support plates sink and affect the transportation of coal and rock, the support oil cylinder is extended to make the scraper conveyor or the rear part of the belt loader tilt up. When the roadheader is cutting coal and rock in a large-fracture tunnel, the length of the extended piston rod of the telescopic oil cylinder is adjusted to change the position of the center of gravity of the roadheader. Prevent the tunnel boring machine from retreating; when the tunnel boring machine climbs a slope, first the right supporting leg cylinder II and the left supporting leg cylinder III can be retracted, and the right supporting leg cylinder I, the right supporting leg cylinder III, the left supporting leg cylinder I, and the left supporting leg cylinder II can be extended to lift the left and right supporting plates; secondly, the right telescopic cylinder and the left telescopic cylinder contract, and as the right telescopic cylinder and the left telescopic cylinder contract, the support seat moves forward to a certain position on the running track, and the left and right supporting plates are lowered to support the coal seam floor. When the tunnel boring machine starts to move forward, the right telescopic cylinder and the left telescopic cylinder can be pushed to give the tunnel boring machine the power to move forward, thereby ensuring that the tunnel boring machine can move forward in a large-degree tunnel.

[0011] Compared with the prior art, the adjustable multifunctional rear support device of the tunnel boring machine designed and developed by the present invention can not only bear the deadweight of the equipment, reduce the vibration load, and prevent the equipment from sliding backward or sideways when working, but also add new functions. The rear of the scraper conveyor or belt loader can be tilted, thereby ensuring the reliability of the mechanical structure and the working efficiency of the mechanical equipment. At the same time, in view of the special geological conditions of the steep coal seam, the main goal is to improve the working safety of the tunnel boring equipment. By studying the working process of the steep tunnel boring equipment, a device that can be applied to the special geological conditions of the steep coal seam is developed, which can give the tunnel boring machine the power to move forward, solve the problems of difficult climbing, poor stability, and low safety factor in the working process of the tunnel boring machine in the current comprehensive excavation working face with a large slope, thereby realizing safe, efficient and rapid tunneling of steep tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the rear support device of the multifunctional tunnel boring machine of the present invention;

[0013] Figure 2 is a schematic diagram of the connecting frame structure;

[0014] Figure 3 It is a schematic diagram of the trapezoidal running track structure;

[0015] Figure 4 It is a schematic diagram of the support seat structure;

[0016] In the figure, 1-connecting frame, 2-right telescopic cylinder, 3-supporting cylinder, 4-right supporting leg cylinder I, 5-right supporting leg cylinder II, 6-right supporting leg cylinder III, 7-right supporting plate, 8-running track, 9-support seat, 10-left supporting leg cylinder I, 11-left supporting leg cylinder II, 12-left supporting plate, 13-left supporting leg cylinder III, 14-left telescopic cylinder. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, an adjustable multifunctional rear support device for a tunnel boring machine comprises a left support plate 12, a right support plate 7 and a connecting frame 1. The left support plate 12 and the right support plate 7 are connected to a support seat 9 respectively through a left support leg cylinder and a right support leg cylinder. A trapezoidal running track 8 which can slide back and forth on the support seat is installed on the support seat 9. The front end of the trapezoidal running track 8 is fixedly connected to the front lower part of the connecting frame 1. Bolt holes are respectively provided at the front and rear ends of the connecting frame 1 to connect the head and tail of the tunnel boring machine frame body. The top support at the rear end of the trapezoidal running track 8 is connected to the supporting cylinder 3 through a pin shaft, and the other end of the supporting cylinder 3 is connected to the rear end of the connecting frame 1 through a pin shaft; a left telescopic cylinder 14 and a right telescopic cylinder 2 are also connected between the support seat 9 and the front end of the connecting frame 1.

[0019] The left supporting leg cylinder is provided with three groups, including left supporting leg cylinder I10, left supporting leg cylinder II11 and left supporting leg cylinder III13; the right supporting leg cylinder is provided with three groups, including right supporting leg cylinder I4, right supporting leg cylinder II5 and right supporting leg cylinder III6.

[0020] like Figure 2 As shown, the connecting frame 1 is a frame structure, a steel plate is provided at the front end of the connecting frame 1, the middle part of the steel plate is hinged to the left telescopic cylinder 14 and the right telescopic cylinder 2 through connecting ears, and the rear part of the connecting frame 1 is hinged to the supporting cylinder 3 through connecting ears.

[0021] like Figure 3 As shown, a pin shaft connecting end 8.1 is provided at the front end of the trapezoidal running track 8, a pin hole is provided on the pin shaft connecting end, trapezoidal sliding blocks 8.2 are symmetrically provided on both sides of the trapezoidal running track 8, the sliding blocks 8.2 are matched and connected with the support seat 9, and a connecting ear I8.3 connected to the supporting cylinder 3 is provided at the top of the rear end of the trapezoidal running track 8.

[0022] like Figure 4 As shown, the support seat 9 is a rectangular box structure, and connecting ears II9.1 for connecting to the left and right supporting leg cylinders are arranged on both sides of the rectangular box, and a groove body 9.2 with the same cross-sectional shape and size as the trapezoidal running track 8 is arranged in the middle of the rectangular box.

[0023] Under normal working conditions, the connecting frame 1 and the support seat 9 are in a fitted state, and the telescopic cylinder 3 is in a normal contracted state. When the geological conditions in the coal mine are relatively soft, when the tunnel boring machine is cutting coal and rock, the rear support legs, i.e. the left and right support plates, will sink due to the weight of the machine body and the gravity of the coal and rock on the scraper conveyor, which will cause the height of the rear part of the machine to decrease, and the scraper conveyor or belt loader, i.e. the second transporter, will touch the tail of the self-moving machine, affecting the transportation of coal and rock, and causing damage to the mechanical equipment. In order to avoid the above results, a telescopic structure of the support cylinder 3 is specially designed. When the left and right support plates sink and affect the transportation of coal and rock, the support cylinder 3 can be extended to make the rear of the scraper conveyor or belt loader tilt up, thereby ensuring the reliability of the mechanical structure and the working efficiency of the mechanical equipment.

[0024] When the roadheader is cutting coal and rock in a large-fragmented tunnel, the position of the roadheader's center of gravity can be changed by adjusting the length of the piston rod of the telescopic cylinder 3 to prevent the roadheader from moving backward and causing damage to the mechanical equipment and safety accidents.

[0025] At the same time, the mechanical mechanism can solve the problem of the difficulty of the tunnel boring machine in climbing in a large broken tunnel. When the tunnel boring machine climbs, first, the right supporting leg cylinder II 5 and the left supporting leg cylinder III 13 can be retracted, and the right supporting leg cylinder I 4, the right supporting leg cylinder III 6, the left supporting leg cylinder I 10, and the left supporting leg cylinder II 11 can be extended to lift the left and right supporting plates. Secondly, the right telescopic cylinder 2 and the left telescopic cylinder 14 are retracted. As the right telescopic cylinder 2 and the left telescopic cylinder 14 are retracted, the support seat 9 moves forward to a certain position on the running track 8, and the left and right supporting plates are lowered to support the coal seam bottom plate. When the tunnel boring machine starts to move forward, the right telescopic cylinder 2 and the left telescopic cylinder 14 can be pushed to give the tunnel boring machine the power to move forward, ensuring that the tunnel boring machine can move forward in the large broken tunnel.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for using an adjustable multifunctional rear support device for a roadheader, characterized in that: The device used comprises a left support plate (12), a right support plate (7) and a connecting frame (1); the left support plate (12) and the right support plate (7) are connected to a support seat (9) via a left support leg oil cylinder and a right support leg oil cylinder respectively; a trapezoidal running track (8) which can slide forward and backward on the support seat is installed on the support seat (9); the front end of the trapezoidal running track (8) is fixedly connected to the front lower part of the connecting frame (1); bolt holes are respectively provided at the front and rear ends of the connecting frame (1) to connect the head and tail of the tunnel boring machine frame; the top of the rear end of the trapezoidal running track (8) is connected to the support cylinder (3) via a pin shaft; the other end of the support cylinder (3) is connected to the rear end of the connecting frame (1) via a pin shaft; a left telescopic oil cylinder (14) and a right telescopic oil cylinder (2) are also connected between the support seat (9) and the front end of the connecting frame (1); The left supporting leg cylinder is provided in three groups, including left supporting leg cylinder I (10), left supporting leg cylinder II (11) and left supporting leg cylinder III (13); the right supporting leg cylinder is provided in three groups, including right supporting leg cylinder I (4), right supporting leg cylinder II (5) and right supporting leg cylinder III (6); The method of use comprises: under normal working conditions, the connecting frame (1) and the supporting seat (9) are in a fitted state, and the supporting oil cylinder (3) is in a normal contracted state; when the geology of the coal mine is relatively soft, when the tunnel boring machine is cutting coal and rock, the left supporting plate (12) and the right supporting plate (7) will sink due to the influence of the deadweight of the machine body and the gravity of the coal and rock on the scraper conveyor, thereby causing the height of the rear part of the machine to decrease; when the left supporting plate (12) and the right supporting plate (7) sink and affect the transportation of coal and rock, the supporting oil cylinder (3) is extended to make the rear part of the scraper conveyor tilt up; when the tunnel boring machine is cutting coal and rock in a steeply sloped tunnel, the length of the piston rod of the supporting oil cylinder (3) is adjusted to change the position of the center of gravity of the tunnel boring machine to prevent the tunnel boring machine from retreating; when the tunnel boring machine is climbing a slope, the right supporting leg oil cylinder (12) is first extended to I (5), the left supporting leg cylinder III (13) are retracted, the right supporting leg cylinder I (4), the right supporting leg cylinder III (6), the left supporting leg cylinder I (10), and the left supporting leg cylinder II (11) are extended so that the left supporting plate (12) and the right supporting plate (7) are lifted. Then, the right telescopic cylinder (2) and the left telescopic cylinder (14) are retracted. As the right telescopic cylinder (2) and the left telescopic cylinder (14) are retracted, the support seat (9) moves forward on the running track (8) to a certain position, and the left supporting plate (12) and the right supporting plate (7) are lowered to support the coal seam bottom plate. When the roadheader starts to move forward, the right telescopic cylinder (2) and the left telescopic cylinder (14) are pushed to give the roadheader the power to move forward, thereby ensuring that the roadheader can move forward in a steeply sloped tunnel.

2. The method for using the adjustable multifunctional rear support device for a roadheader according to claim 1, characterized in that: The connecting frame (1) is a frame structure. A steel plate is provided at the front end of the connecting frame (1). The middle of the steel plate is hinged to the left telescopic cylinder (14) and the right telescopic cylinder (2) via a connecting ear. The rear of the connecting frame (1) is hinged to the supporting cylinder (3) via a connecting ear.

3. The method for using the adjustable multifunctional rear support device for a roadheader according to claim 1, characterized in that: The front end of the trapezoidal running track (8) is provided with a pin shaft connecting end (8.1), and a pin hole is provided on the pin shaft connecting end. Trapezoidal sliding blocks (8.2) are symmetrically provided on both sides of the trapezoidal running track (8), and the sliding blocks (8.2) are cooperatively connected to the support seat (9). The top of the rear end of the trapezoidal running track (8) is provided with a connecting ear I (8.3) connected to the supporting oil cylinder (3).

4. The method for using the adjustable multifunctional rear support device for a roadheader according to claim 1, characterized in that: The support seat (9) is a rectangular box structure, and connecting ears II (9.1) for connecting to the left supporting leg cylinder and the right supporting leg cylinder are arranged on both sides of the rectangular box, and a groove body (9.2) with the same cross-sectional shape and size as the trapezoidal running track (8) is arranged in the middle of the rectangular box.

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