Continuous belt deslagging system for double-hole double-line TBM (Tunnel Boring Machine) rotary inclined shaft

Abstract

The invention relates to the technical field of in-tunnel muck transportation, in particular to a double-tunnel double-line TBM (tunnel boring machine) rotary inclined shaft continuous belt deslagging system which comprises a branch tunnel belt conveyor, a distributing mechanism with a three-way funnel is arranged at the tail of the branch tunnel belt conveyor, and muck is distributed to a first transfer belt conveyor and a second transfer belt conveyor by the distributing mechanism. The first transshipment belt conveyor and the second transshipment belt conveyor are arranged in a staggered mode, the tail of the first transshipment belt conveyor extends to the slag yard, and the tail of the second transshipment belt conveyor extends to the slag car. The requirement for long-distance and large-capacity material transfer under the complex geological condition is met, and meanwhile the double goals of economic benefits and environmental protection are taken into account.

Description

Technical Field

[0001] The invention relates to the technical field of in-tunnel slag transportation, in particular to a double-tunnel double-line TBM inclined shaft continuous belt slag discharge system. Background Art

[0002] During mining and tunnel construction, a large amount of waste slag will be generated. How to efficiently transport this waste slag from the working surface to the designated location is an important issue. In recent years, TBM construction technology has developed rapidly, and various technologies have been widely used in TBM construction. The application of most technologies is limited to the TBM equipment itself in the tunnel, and the slag discharge method that matches TBM excavation still uses the traditional slag discharge method of rail transportation in the tunnel and loader and dump truck slag transfer outside the tunnel. With the rise of TBM continuous belt conveyor technology, the efficiency of TBM excavation slag discharge has been greatly improved, but the slag transfer outside the tunnel is still carried out by traditional loaders and small dump trucks to the waste dump, which has low construction efficiency and high maintenance costs during the process. At the same time, affected by uncertain factors such as insufficient dump truck transportation capacity, access road interference and bad weather, the slag capacity inside and outside the tunnel is not matched, affecting the construction progress, thereby leading to an invisible increase in the cost of TBM excavation slag discharge.

[0003] Traditional transportation methods are inefficient, costly, and easily restricted by terrain conditions, which has a certain impact on the environment. Therefore, it is particularly important to develop a waste slag transportation system that can adapt to complex environments and has high efficiency. Summary of the invention

[0004] The present invention provides a double-hole double-line TBM inclined shaft continuous belt slag discharge system, which realizes the efficient transmission of waste slag from the tunnel to the external slag yard or slag truck by optimizing the design parameters and layout structure of the belt conveyor.

[0005] The specific technical scheme is as follows: it includes a branch tunnel belt conveyor, at the tail of which is provided a material dividing mechanism with a three-way funnel, the material dividing mechanism distributes the slag to transfer belt conveyor 1 and transfer belt conveyor 2, the transfer belt conveyor 1 and transfer belt conveyor 2 are arranged alternately, the tail of the transfer belt conveyor 1 extends to the slag yard, and the tail of the transfer belt conveyor 2 extends to the slag truck.

[0006] Preferably, the branch tunnel belt conveyor has a conveying capacity of more than 3 kilometers and can transport materials at a speed of 1,200 tons per hour.

[0007] Preferably, at least one transfer station is included, and at least two sets of drive motors with a power of more than 400 kW are installed at each transfer station.

[0008] Preferably, a protective device is provided at the drive motor.

[0009] Preferably, the transfer belt conveyor unloads slag to the slag yard through a cantilever structure.

[0010] Preferably, the belts of the branch hole belt conveyor, transfer belt conveyor 1 and transfer belt conveyor 2 are all made of steel wire rope core material, and the width is not less than 1200 mm.

[0011] Preferably, a cleaning device for keeping the surface of the conveyor belt clean is provided at the head of the branch hole belt conveyor.

[0012] Preferably, the transfer belt conveyor 1 and the transfer belt conveyor 2 are both tightened by a tail spiral; the branch hole belt conveyor is tightened by a bottom car-type weight.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention significantly reduces the time wasted due to frequent parking and loading and unloading under the traditional method by implementing an efficient slag transmission solution, thereby speeding up the overall project progress and further improving construction efficiency.

[0015] 2. Compared with the traditional automobile transportation mode, the continuous belt conveying method of the present invention greatly reduces energy consumption and maintenance costs, and also reduces the demand for heavy machinery and equipment, thereby reducing cost expenditures.

[0016] 5. The regular maintenance and inspection system of the present invention, combined with the selection and use of high-quality materials, effectively prolongs the working life of each component, reduces the frequency of replacement, and thus prolongs the life of the equipment.

[0017] 6. Compared with other means of transportation, this system is more energy-saving and environmentally friendly, and meets the requirements of modern green building concepts. This slag removal solution not only meets the needs of long-distance and large-capacity material transfer under complex geological conditions, but also takes into account the dual goals of economic benefits and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of the present invention;

[0019] Figure 2 This is a schematic diagram of the branch tunnel slag transfer arrangement in the present invention;

[0020] Figure 3 This is a schematic diagram of the head structure of the branch hole belt conveyor in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the transfer belt conveyor 1 in the present invention;

[0022] Figure 5 It is a schematic diagram of the mechanism of the second transfer belt conveyor in the present invention;

[0023] Figure 6It is a schematic diagram of the middle drive layout of the middle branch hole belt conveyor of the present invention;

[0024] Figure 7 It is a schematic diagram of the layout structure of the tail car-type heavy hammer tensioning device in the present invention;

[0025] Figure 8 It is a schematic diagram of the tail structure of the branch hole belt conveyor in the present invention;

[0026] Fig. 9 It is a schematic diagram of the branch hole hanging structure in the present invention; DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] Example 1

[0029] A double-hole double-line TBM inclined shaft continuous belt slag discharge system, such as Figures 1 to 9 As shown, it includes a branch tunnel belt conveyor, and a material distribution mechanism with a three-way funnel is provided at the tail of the branch tunnel belt conveyor. The material distribution mechanism distributes the slag to the transfer belt conveyor 1 and the transfer belt conveyor 2. The transfer belt conveyor 1 and the transfer belt conveyor 2 are arranged alternately. The tail of the transfer belt conveyor 1 extends to the slag yard, and the tail of the transfer belt conveyor 2 extends to the slag truck. The transfer belt conveyor 1 unloads slag to the slag yard through a cantilever structure, and the foundation is set next to the retaining wall, with a cantilever distance of about 15m. The transfer belt conveyor 2 can also unload materials to the two slag trucks through a three-way funnel.

[0030] The branch tunnel belt conveyor adopts central drive, and the driving part is 2*400KW and is installed in the water tank position. It has a conveying capacity of more than 3 kilometers and can transport materials at a speed of 1,200 tons per hour.

[0031] The tail of the branch tunnel belt conveyor is connected to the continuous belt conveyor for material dropping, and the leg spacing is set to about 12 meters to ensure that there is no support at the tunnel section, ensuring a trackless transportation channel.

[0032] It also includes at least one transfer station, and at least two sets of drive motors with a power of more than 400KW are installed at each transfer station. A protective device is provided at the drive motor, and a cleaning device is provided at the head of the branch hole belt conveyor to keep the conveyor belt surface clean, and a backstop is added to the unloading roller to prevent the belt from reversing.

[0033] The belts of the branch tunnel belt conveyor, transfer belt conveyor 1 and transfer belt conveyor 2 are all made of wire rope core material and the width is not less than 1200mm.

[0034] Transfer belt conveyor 1 and transfer belt conveyor 2 both use the tail spiral tensioning method; the branch hole belt conveyor uses the bottom car-type weight method for tensioning, and the tail car-type weight tensioning device is located in the fire pressure chamber, where the tension is the smallest and is suitable for setting up a tensioning device.

[0035] In this embodiment, a hanging structure is used in the tunnel to ensure a 4.5-meter transportation space. The upper rollers are trough-type, the lower rollers are V-type rollers throughout, and an adjustable structure is designed at the head turning point.

[0036] When installing the present invention, first determine the specific position of each component according to the design plan; then assemble the main belt conveyor, transfer belt conveyor and related auxiliary facilities in sequence; finally, debug until the expected performance indicators are achieved. Before starting, check whether all mechanical parts are in good condition; after turning on the power, gradually increase the load according to the preset program until full load operation; regularly clean the surface of the conveyor belt and check the tension to maintain the best working condition. The conveyor belt can be fully cleaned after each shift; all moving parts are fully checked at least once a week for signs of wear or damage; and a thorough overhaul is carried out once a year and necessary parts are replaced.

[0037] The present invention utilizes the main and branch tunnel belt conveyors and the transfer belt conveyors to work in coordination to realize the rapid transportation of slag.

[0038] The main branch tunnel conveyor is configured to transport materials from the inside of the tunnel to the outside, with a conveying distance of more than 3.5 kilometers and capable of transporting materials at a speed of 1,200 tons / hour. It adopts a central drive method (2×400KW), which helps to evenly distribute the load and improve efficiency. In order to ensure the passage space of trackless transport vehicles, the spacing between the support legs is set to about 12 meters. In addition, a cleaning device and an unloading roller plus a backstop are installed at its head to ensure the cleanliness of the equipment and prevent the belt from reversing.

[0039] A material distribution mechanism with a three-way funnel is set at the end of the main belt, which can guide the slag in two different directions - to the slag yard through transfer belt conveyor 1 or to be loaded onto the slag truck through transfer belt conveyor 2. The two transfer belt conveyors are arranged in a staggered manner, one of which directly extends to the top of the designated slag pile area and completes the unloading action through the cantilever structure; the other flexibly uses the three-way funnel mechanism to serve two slag trucks waiting to be loaded at the same time. This design not only improves the slag discharge efficiency, but also enhances the flexibility of the system.

[0040] The entire system also includes multiple transfer stations, which are equipped with powerful drive units (at least 400KW each) to maintain high power output. At the same time, all key components are well protected, such as special safety shields around the motors. Steel wire rope cores are selected as the conveyor belt base material with a width of not less than 1200 mm to enhance the load-bearing capacity and durability. In addition, advanced tensioning technologies such as spiral tensioning (for transfer belt conveyors) and bottom car-type heavy hammer tensioning (for main branch hole belt conveyors) are used to ensure that the appropriate tension level can be maintained even after long-term operation.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-hole double-line TBM inclined shaft continuous belt slag discharge system, characterized in that: It includes a branch tunnel belt conveyor, at the tail of which is provided a material dividing mechanism with a three-way funnel, the material dividing mechanism distributes the slag to a transfer belt conveyor 1 and a transfer belt conveyor 2, the transfer belt conveyor 1 unloads the slag to the slag yard through a cantilever structure, the belts of the branch tunnel belt conveyor, the transfer belt conveyor 1 and the transfer belt conveyor 2 are all made of steel wire rope core material, the transfer belt conveyor 1 and the transfer belt conveyor 2 are staggered, the tail of the transfer belt conveyor 1 extends to the slag yard, and the tail of the transfer belt conveyor 2 extends to the slag truck.

2. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 1, characterized in that: The branch tunnel belt conveyor has a conveying capacity of more than 3 kilometers and can transport materials at a speed of 1,200 tons per hour.

3. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 1, characterized in that: It includes at least one transfer station, and at least two sets of driving motors with a power of more than 400KW are installed at each transfer station.

4. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 3 is characterized by: A protective device is provided at the driving motor.

5. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 1, characterized in that: The widths of the belts of the branch hole belt conveyor, the first transfer belt conveyor, and the second transfer belt conveyor are not less than 1200 mm.

6. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 1, characterized in that: A cleaning device for keeping the surface of the conveyor belt clean is arranged at the head of the branch hole belt conveyor.

7. The continuous belt slag discharge system for double-hole double-line TBM inclined shaft according to claim 1, characterized in that: The transfer belt conveyor 1 and the transfer belt conveyor 2 are both tightened by a tail spiral; the branch hole belt conveyor is tightened by a bottom car-type weight.

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