Large-gradient long inclined shaft hole bottom stirring system
By integrating the inclined shaft winch system, transport trolley, and automated belt conveyor mixing system, the problem of wet shotcrete transportation and mixing in long inclined shafts with steep gradients has been solved, achieving an efficient, safe, and automated construction process and improving construction quality and continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-10
AI Technical Summary
In the construction of long inclined shafts using TBMs with steep slopes, it is difficult to ensure the quality and supply of wet shotcrete in a continuous and stable manner, resulting in poor shotcrete quality and affecting the continuity of construction and the support effect.
A mixing system was designed, comprising an inclined shaft winch system, a transport trolley, an automated belt conveyor, and a bottom mixing station, to achieve efficient, safe, and automated transportation and mixing of dry materials, reduce manual intervention, and improve construction efficiency.
It improves the construction efficiency and quality of wet sprayed concrete, ensures the continuity of the spraying process and the support effect, and is suitable for construction needs in complex terrain.
Smart Images
Figure CN223984478U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tunnel engineering construction technology, specifically relating to a mixing system at the bottom of a long inclined shaft with a large slope. Background Technology
[0002] In the construction of long inclined shafts using TBMs with steep slopes, the stability of the surrounding rock and construction safety requirements are high. Therefore, it is necessary to provide initial support to the surrounding rock in a timely manner during TBM excavation. Wet shotcrete is one of the most commonly used and effective initial support measures. Compared with other forms of shotcrete, wet shotcrete has advantages such as less dust, lower rebound rate, and a more environmentally friendly operating environment. In long-distance, steep inclined shafts, TBM and wet shotcrete operations usually need to be carried out simultaneously or closely linked to seal the surrounding rock in a timely manner, reduce the risk of loosening and collapse, and form an initial support framework.
[0003] However, construction sites often face several challenges that make it difficult to consistently guarantee the quality and supply of wet-mixed shotcrete: Long, steeply sloped shafts are often characterized by limited space, steep longitudinal slopes, and long distances, requiring wet-mixed shotcrete to undergo multiple stages or transports to reach the spraying face. Multiple transports can lead to changes in the fluidity of the concrete mix, segregation, air loss, and unstable water-cement ratios, ultimately affecting the spraying quality. Furthermore, the design and management of the wet-mixed shotcrete mix are crucial to construction quality. During long-distance transport or multiple transfers, inadequate control of plasticity and slump retention can result in significant slump loss, making it difficult to meet design requirements for the thickness and uniformity of the sprayed layer. Additionally, temperature changes or improper use of accelerators or admixtures can cause uncontrolled setting time, segregation, and even pipe blockage. In conclusion, to ensure construction continuity and support quality in long, steeply sloped shaft TBM construction, a systematic and integrated technical research and management of the entire process of wet-mixed shotcrete mixing, transport, and spraying is necessary. How to achieve high-quality and rapid supply of wet shotcrete and ensure its spraying quality in limited downhole space and complex construction environment has become a key technical challenge that urgently needs to be overcome in this field. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a mixing system at the bottom of a long inclined shaft with a large slope, which is simple in structure, easy to operate, highly automated, and can improve the efficiency of wet shotcrete construction in the TBM tunnel of a long inclined shaft.
[0005] The technical solution of this utility model is as follows: a large-slope long inclined shaft bottom mixing system, comprising: an inclined shaft winch system, a transport trolley, a horizontal transport belt, a dry material storage box, a transfer belt, a transfer inclined belt, a bottom mixing station, and a transport vehicle. The inclined shaft winch system is located at the top of the inclined shaft and connected to one end of the transport trolley via a rope. The transport trolley moves on the inclined shaft slope. The other end of the transport trolley is connected to one end of the horizontal transport belt. A dry material storage box is located below the other end of the horizontal transport belt. A transfer belt is located below the dry material storage box. One end of the transfer belt is obliquely connected to one end of the transfer inclined belt. The inlet of the bottom mixing station is located below the other end of the transfer inclined belt. The transport vehicle is located below the outlet of the bottom mixing station.
[0006] Furthermore, the inclined shaft winch system is connected to one end of the transport trolley via ropes and ground rollers, with the ropes connected to the ground rollers and several of the ground rollers set on the slope of the inclined shaft.
[0007] Furthermore, the dry material storage box is 3m long, 2m wide, and 3m high, and the bottom of the dry material storage box is funnel-shaped.
[0008] The beneficial effects of this utility model are:
[0009] 1. Improve transportation efficiency: Through the cooperation of the inclined shaft winch system and the transport trolley, materials can be transported quickly and safely on the inclined shaft slope, reducing the need for traditional manual handling and greatly improving transportation efficiency;
[0010] 2. High degree of automation: The system integrates automated equipment such as horizontal conveyor belts, transfer belts and inclined transfer belts, which reduces manual intervention, not only reducing labor intensity, but also further improving overall work efficiency;
[0011] 3. High flexibility: The use of transport wagons and transport vehicles allows material transportation to flexibly adapt to different terrains and transportation distances, enhancing the system's applicability;
[0012] 4. High safety: The inclined shaft winch system is connected to the transport trolley through ropes and ground rollers. The ground rollers are set on the inclined shaft slope, which reduces the direct friction between the ropes and the slope and improves the safety during transportation.
[0013] 5. Easy to maintain: The various components of the system (such as the inclined shaft winch system, conveyor belt, dry material storage box, etc.) are designed to be relatively independent, which facilitates daily maintenance and repair and reduces downtime caused by failure.
[0014] In summary, the bottom mixing system of this utility model for long inclined shafts with steep slopes integrates an inclined shaft winch system, a transport trolley, an automated belt conveyor, and a bottom mixing station, achieving efficient, safe, and automated material transportation and mixing processes. It is very suitable for application in long inclined shaft environments with steep slopes. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a large-slope long inclined shaft bottom mixing system according to this utility model.
[0016] Figure 2 yes Figure 1 A cross-sectional view of point AA.
[0017] In the diagram: 1- Inclined shaft winch system, 2- Ground roller, 3- Sloping inclined shaft, 4- Transport trolley, 5- Horizontal transport belt, 6- Dry material storage box, 7- Transfer belt, 8- Transfer inclined belt, 9- Bottom mixing station, 10- Transport vehicle. Detailed Implementation
[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0019] like Figure 1-2 As shown, a bottom mixing system for a long inclined shaft with a large slope includes: an inclined shaft winch system 1 (JTP series mining hoisting winch), a transport trolley 4, a horizontal transport belt 5, a dry material storage box 6, a transfer belt 7, a transfer inclined belt 8, a bottom mixing station 9, and a transport vehicle 10. The inclined shaft winch system 1 is located at the top of the inclined shaft and is connected to one end of the transport trolley 4 by a rope. The transport trolley 4 moves on the slope of the inclined shaft. The other end of the transport trolley 4 is connected to one end of the horizontal transport belt 5. The dry material storage box 6 is located below the other end of the horizontal transport belt 5. The transfer belt 7 is located below the dry material storage box 6. One end of the transfer belt 7 is obliquely connected to one end of the transfer inclined belt 8. The inlet of the bottom mixing station 9 is located below the other end of the transfer inclined belt 8. The transport vehicle 10 is located below the outlet of the bottom mixing station 9.
[0020] Preferably, the inclined shaft winch system 1 is connected to one end of the transport trolley 4 via a rope and ground rollers 2, the rope being connected to the ground rollers 2, and a plurality of the ground rollers 2 being arranged on the slope of the inclined shaft.
[0021] Preferably, the dry material storage box 6 is 3m long, 2m wide, and 3m high, and the bottom of the dry material storage box 6 is funnel-shaped.
[0022] In operation, dry materials are loaded into transport carts 4 at the top of the steep inclined shaft 3. Then, the inclined shaft winch system 1 pulls the transport carts 4 down the slope to the bottom via ropes. The transport carts 4 unload the dry materials onto the horizontal transport belt 5. The horizontal transport belt 5 then transports the dry materials to the dry material storage box 6. The dry material storage box 6 sends the dry materials to the transfer belt 7 through the bottom funnel. The transfer belt 7 transports the dry materials to the transfer inclined belt 8. The transfer inclined belt 8 lifts and unloads the dry materials to the inlet of the bottom mixing station 9. The bottom mixing station 9 mixes the dry materials. The mixed materials are unloaded from the outlet to the transport vehicle 10. Finally, the transport vehicle 10 transports the materials to the designated location.
[0023] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made to it.
Claims
1. A long steeply inclined shaft bottom mixing system, characterized in that, The utility model relates to a kind of dry material transport system, including: Inclined shaft winch system (1), transport hopper (4), horizontal transport belt (5), dry material storage box (6), transfer belt (7), transfer inclined belt (8), hole bottom mixing station (9) and transport vehicle (10), the inclined shaft winch system (1) is set in inclined shaft top and is connected with the one end of transport hopper (4) by rope, the transport hopper (4) moves on inclined shaft slope surface, the other end of the transport hopper (4) is connected with the one end of horizontal transport belt (5), the other end of the horizontal transport belt (5) is below with dry material storage box (6), the dry material storage box (6) is below with transfer belt (7), the one end of the transfer belt (7) is connected with the one end of transfer inclined belt (8) obliquely, the other end of the transfer inclined belt (8) is below with the feed inlet of hole bottom mixing station (9), the discharge outlet of the hole bottom mixing station (9) is below with transport vehicle (10).
2. The long and large slope inclined shaft hole bottom mixing system according to claim 1, characterized in that, The inclined shaft winch system (1) is connected with the one end of transport hopper (4) by rope and ground roller (2), the rope is connected with ground roller (2), and a plurality of ground roller (2) is arranged on the slope surface of inclined shaft.
3. The long and large slope inclined shaft hole bottom mixing system according to claim 1, characterized in that, The dry material storage box (6) is 3m long, 2m wide, 3m high, and the bottom of the dry material storage box (6) is funnel-shaped.