Constant-flow variable-pressure water supply system suitable for long-distance and large-height-difference TBM

Abstract

The invention belongs to the technical field of underground mining, and particularly relates to a long-distance and large-height-difference TBM constant-flow variable-pressure water supply system which comprises a series connection booster pump set, a water supply point and a TBM equipment water consumption point. The series connection pressure pump set is arranged along a prospecting inclined shaft roadway and pumps water of a water supply point to a TBM equipment water consumption point. The series connection pressure pump set is formed by sequentially connecting a plurality of single-pole pressure pumps in series. Compared with the prior art, the stage number of the running water pumps can be dynamically adjusted according to the actual water use condition, in the prospecting inclined shaft roadway construction process, the series pump stage number of the pressure pump set is gradually increased along with engineering propulsion, the equipment energy consumption can be effectively reduced, and the energy utilization efficiency is improved. Meanwhile, for water supply areas with complex terrains, long pipelines or large height difference changes, multi-stage series water supply can better adapt to the special situations.

Description

Technical Field

[0001] The invention belongs to the technical field of underground mining, and in particular relates to a TBM constant flow variable pressure water supply system suitable for long distance and large height difference. Background Art

[0002] With the development of the global economy, the demand for mineral resources continues to grow. Mines need to continuously improve mining efficiency and production capacity to meet market demand. Traditional mining methods such as drilling and blasting have problems such as low efficiency, poor safety, and great impact on the environment, which are difficult to meet the requirements of efficient, safe, and green mining in modern mines. As an advanced tunnel boring equipment, TBM has the advantages of high efficiency, safety, and environmental protection, providing a new solution for mining. In recent years, TBM technology has made significant progress in the field of tunnel engineering, and the performance and reliability of equipment have been continuously improved. For example, the improvement of tool technology has improved the excavation efficiency of TBM in hard rock; the application of automatic control systems has improved the operating accuracy and stability of equipment. These technological advances have laid the foundation for the application of TBM in mines. In the construction of TBM (Tunnel Boring Machine, full-section tunnel boring machine), water supply plays a vital role. However, in the current TBM construction process, when conducting long-distance, high-difference prospecting, mining production or construction in mountainous areas, the water supply requirements of the equipment have certain particularities. The water consumption is generally a constant value, but the water supply pressure will gradually increase with the distance and altitude of the water supply point, which requires the water supply system to have a large water supply pressure range. Therefore, it is difficult to supply water well to water supply areas with complex terrain, long pipelines or large elevation differences.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a TBM constant flow variable pressure water supply system suitable for long distances and large elevation differences.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A constant flow variable pressure water supply system for TBMs with long distances and large elevation differences, comprising a series of pressure pump groups, water supply points, and TBM equipment water use points;

[0007] The series booster pump group is arranged along the prospecting inclined shaft tunnel, and the series booster pump group pumps water from the water supply point to the water use point of the TBM equipment; the series booster pump group is composed of multiple groups of single-pole booster pumps connected in series in sequence.

[0008] Preferably, the lift of the single-stage booster pump in the series booster pump group does not exceed 200m.

[0009] Preferably, the single-stage booster pump in the series booster pump group is a variable frequency water supply.

[0010] Preferably, the number of the single-stage booster pumps in the series booster pump group is 2, which are redundantly arranged.

[0011] Preferably, an adjustable pressure reducing valve is provided at the outlet of the final-stage booster pump in the series booster pump group to control the outlet pressure.

[0012] Preferably, the water supply point is a sedimentation tank or a water storage tank.

[0013] Preferably, the water supply distance range of the series booster pump group is 0 to 5.4 km, the water supply height difference range is 0 to 735 m, and the water supply pressure range is 0 to 10 MPa.

[0014] Preferably, the water pressure at the water use point of the TBM equipment is 0.4-0.8 MPa.

[0015] Preferably, a multifunctional water pump control valve is provided at the outlet of each unipolar booster pump in the series booster pump group.

[0016] Compared with the prior art, the present invention provides a constant flow variable pressure water supply system for TBMs with long distances and large elevation differences, and its beneficial effects are:

[0017] 1. The present invention provides a constant-flow variable-pressure water supply system for TBMs with long distances and large elevation differences. The system can dynamically adjust the number of operating water pumps according to actual water usage conditions. During the construction of prospecting inclined shafts and tunnels, the booster pump group gradually increases the number of series-connected pumps as the project progresses, which can effectively reduce equipment energy consumption and improve energy utilization efficiency.

[0018] 2. The present invention provides a TBM constant flow variable pressure water supply system suitable for long distances and large elevation differences, which can be flexibly configured according to different water supply needs and site conditions. For water supply areas with complex terrain, long pipelines or large elevation differences, multi-stage series water supply can better adapt to these special situations.

[0019] 3. The present invention provides a constant flow variable pressure water supply system for TBMs with long distances and large elevation differences. Since multiple water pumps work together, even if one of the water pumps fails, the other water pumps can continue to operate for a period of time, which buys time for maintenance and reduces the risk of the entire water supply system being paralyzed due to a single device failure. The multi-stage water pumps are connected in series to effectively reduce the water pressure and greatly reduce the failure rate of the water supply system.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A structural schematic diagram of a TBM constant flow variable pressure water supply system suitable for long distances and large elevation differences proposed in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of a single-stage booster pump in a TBM constant-flow variable-pressure water supply system suitable for long distances and large elevation differences, as proposed in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of a final-stage booster pump in a TBM constant-flow variable-pressure water supply system suitable for long distances and large elevation differences, as proposed in an embodiment of the present invention.

[0025] The diagram is as follows:

[0026] 100. Water supply point; 200. Series booster pump group; 300. TBM equipment water point.

[0027] 201. Single-stage booster pump; 202. Final-stage booster pump; 203. Multifunctional water pump control valve; 204. Adjustable pressure reducing valve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0029] The embodiment of the present invention provides a TBM constant flow variable pressure water supply system suitable for long distance and large elevation difference, comprising a series booster pump group 200, a water supply point 100, and a TBM equipment water point 300; the series booster pump group 200 is arranged along the prospecting inclined shaft tunnel, and the series booster pump group 200 pumps the water from the water supply point 100 to the TBM equipment water point 300; the series booster pump group 200 is formed by a plurality of groups of single-pole booster pumps 201 connected in series in sequence. The head of the single-pole booster pump 201 in the series booster pump group 200 does not exceed 200m. The single-pole booster pump 201 in the series booster pump group 200 is a variable frequency water supply. The number of single-pole booster pumps 201 in the series booster pump group 200 is 2, which are redundantly arranged. An adjustable pressure reducing valve 204 is arranged at the outlet of the last-stage booster pump 202 in the series booster pump group 200 to control the outlet pressure. The water supply point 100 is a sedimentation tank or a water storage tank. The water supply distance range of the series booster pump group 200 is 0 to 5.4 km, the water supply height difference range is 0 to 735 m, and the water supply pressure range is 0 to 10 MPa. The water pressure of the TBM equipment water point 300 is 0.4 to 0.8 MPa. A multifunctional water pump control valve 203 is provided at the outlet of the single-stage booster pump 201 in the series booster pump group 200.

[0030] The present invention provides a constant flow variable pressure water supply system for TBMs with long distances and large elevation differences. When conducting long-distance and large elevation difference prospecting, mining production or construction in mountainous areas, the water supply requirements of the equipment have certain particularities. The water consumption is generally a constant value, but the water supply pressure will gradually increase with the continuous advancement of the water supply distance and altitude of the water use point, which requires the water supply system to have a large water supply pressure range. For example, in a certain prospecting inclined shaft project, the water supply distance range is 0 to 5.4 km, the water supply elevation range is 0 to 735 m, the water supply pressure range is 0 to 10 MPa, and the actual required water pressure at the water use point is 0.4 to 0.8 MPa.

[0031] In order to ensure the above water supply requirements, a constant flow variable pressure water supply system is adopted. A series booster pump group 200 is set in the prospecting inclined shaft tunnel, and the number of series pumps is gradually increased as the project progresses. In order to ensure the pressure requirements of the water point, the single-stage head of the booster pump does not exceed 200m, variable frequency water supply is adopted, and an adjustable pressure reducing valve 204 is set at the outlet of the final stage booster pump 202 to control the outlet pressure. Constant flow variable pressure water supply is achieved during the overall project advancement.

[0032] The positive effects of the present invention are: 1. High water supply reliability. Since multiple water pumps work together, even if one of the water pumps fails, the other water pumps can continue to operate for a period of time, which buys time for maintenance and reduces the risk of the entire water supply system being paralyzed due to a single equipment failure. The multi-stage water pumps in series effectively reduce the water pressure and greatly reduce the failure rate of the water supply system. 2. Wide adaptability and flexible configuration according to different water supply needs and site conditions. For water supply areas with complex terrain, long pipelines or large elevation differences, multi-stage series water supply can better adapt to these special situations. 3. High efficiency and energy saving, the number of operating water pumps can be dynamically adjusted according to the actual water use situation. During the construction of the prospecting inclined shaft and tunnel, the booster pump group gradually increases the number of series pumps as the project progresses, which can effectively reduce equipment energy consumption and improve energy efficiency.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A constant flow variable pressure water supply system for TBMs with long distances and large elevation differences, characterized in that: Including series booster pump group, water supply point, TBM equipment water point; The series booster pump group is arranged along the prospecting inclined shaft tunnel, and the series booster pump group pumps water from the water supply point to the water use point of the TBM equipment; the series booster pump group is composed of multiple groups of single-pole booster pumps connected in series in sequence.

2. According to claim 1, a TBM constant flow variable pressure water supply system suitable for long distance and large elevation difference is characterized in that: The lift of the single-stage booster pump in the series booster pump group does not exceed 200m.

3. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 2, characterized in that: The single-stage booster pump in the series booster pump group is a variable frequency water supply.

4. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 3, characterized in that: The number of the single-stage booster pumps in the series booster pump group is 2, which are redundantly arranged.

5. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 4, characterized in that: An adjustable pressure reducing valve is arranged at the outlet of the last-stage booster pump in the series booster pump group to control the outlet pressure.

6. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 5, characterized in that: The water supply point is a sedimentation tank or a water storage tank.

7. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 6, characterized in that: The water supply distance range of the series booster pump group is 0 to 5.4 km, the water supply height difference range is 0 to 735 m, and the water supply pressure range is 0 to 10 MPa.

8. The constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 7 is characterized in that: The water pressure at the water-using points of the TBM equipment is 0.4-0.8 MPa.

9. A constant flow variable pressure water supply system for TBMs suitable for long distances and large elevation differences according to claim 8, characterized in that: A multifunctional water pump control valve is provided at the outlet of each single-stage booster pump in the series booster pump group.

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