CN115324582A - A system and method for discharging slag on a vertical shaft full-section roadheader - Google Patents

Abstract

The invention discloses a slag discharge system on a vertical shaft full-section roadheader. , the multi-scale slag and water are discharged upward to the secondary slag discharge unit through the primary slag discharge pipeline; the inlet of the water slag separation equipment of the secondary slag discharge unit is connected with the primary slag discharge pipeline, and the rock slag outlet is connected to The crushing equipment and the water outlet are connected to the slag silo; the inlet of the grinding equipment is connected to the slag outlet of the water-slag separation equipment, and the outlet of the grinding equipment is connected to the slag silo; the slag in the slag silo is pumped by the secondary slag discharge pump to the ground. The invention eliminates the problem that it is difficult to set up a relay station in the wellbore, and after eliminating the large-scale rock slag, the problem of pipe blockage is effectively solved; the mud circulation becomes water circulation, and the energy consumption is greatly reduced; Well lay a solid foundation.

Description

System and method for removing slag on a shaft full-face boring machine

Technical field:

The invention relates to a slag discharge system and method on a vertical shaft full-face boring machine, belonging to the technical field of underground engineering construction.

Background technique:

Efficient and continuous upward slag discharge in the construction of shafts, especially deep shafts with full-face tunnel boring machines, is a key technical problem at home and abroad, resulting in low construction efficiency in deep shafts.

Traditional slag discharge method 1, mud circulation slag discharge method. It adopts a certain proportion of mud to carry rock slag and is lifted and transported by the mud pump, and then the mud is returned to the working face for recycling. In shallow wells (100m), it can be directly transported to the ground; in medium and deep wells, several groups of relay stations need to be set up to relay to the ground. The disadvantages are low mud circulation efficiency and high energy consumption; large-scale rock slag is easy to block pipes and high failure rate; the wellbore space is limited, it is very difficult to set up relay stations, and the reliability is poor; various chemical agents are added to the mud, which is difficult to comply with environmental protection Require.

The second traditional slag discharge method is the combination of the first-stage slag discharge pump and the second-stage lifting bucket. It is necessary to install a water and slag separation device on the suspension plate. The slag discharge pump transports water and rock slag to the water and slag separation device on the suspension plate for a short distance. After the separation, the rock slag is transported to the ground by a bucket driven by a winch. Its disadvantages are: it is difficult to automate the process of bucket transportation; there are many overall links, complex procedures, many equipment, and discontinuity; low slag discharge efficiency; high energy consumption.

Invention content:

In order to overcome the defects of the prior art, the object of the present invention is to provide a slag discharge system and method on a shaft full-face boring machine, which effectively solves the existing problems and deficiencies.

The present invention solves technical problem and adopts following technical scheme:

A slag discharge system on a shaft full-face boring machine, which includes:

The first-level slag discharge unit, the second-level slag discharge unit, and the control system;

The first-level slag discharge unit includes a first-level slag discharge pump and a first-level slag discharge pipeline. The first-level slag discharge pump is installed in the cutter head of the roadheader, and the multi-scale rock slag and water are separated by the first-level slag discharge pipeline. Discharge upwards to the secondary slag discharge unit;

The secondary slag discharge unit includes water slag separation equipment, crushing equipment, grinding equipment, slag paddle bin and secondary slag discharge pump arranged from top to bottom;

The inlet of the water slag separation equipment is connected to the first-stage slag discharge pipeline, the rock slag outlet is connected to the crushing equipment, and the water outlet is connected to the slag paddle bin;

The inlet of the grinding equipment is connected to the rock slag outlet of the water slag separation equipment, and the outlet of the grinding equipment is connected to the slag paddle bin;

The slurry in the slurry slurry bin is pumped to the ground by the secondary slag discharge pump.

As a preference, further, a sedimentation tank is provided on the ground, the secondary slag discharge pipeline of the secondary slag discharge pump is connected to the sedimentation tank, and a partition is arranged in the sedimentation tank, and the clean water after the partition is returned to The water pipeline returns to the excavation face for recycling.

Preferably, further, the slag slurry bin is also connected with a water supply pipe, and a stirring device, a high liquid level sensor, a low liquid level sensor, and a slurry concentration sensor are also arranged in the slag slurry bin, and each of the sensors and the control water supply The solenoid valves for switching on and off the pipes are all electrically connected with the control system.

Preferably, further, in the water slag separation equipment, rock slag with a particle size of ≤0.4 mm enters the slag slurry bin directly through pipelines together with water.

Preferably, further, in the crushing equipment, after crushing, rock slag with a particle size of <8mm enters the grinding equipment.

As a preference, further, in the grinding equipment, after grinding, rock slag with a particle size of <0.4mm enters the slag slurry chamber, and after being stirred, the slag slurry is formed and pumped to the sedimentation tank by the secondary slag discharge pump.

A method of using the above-mentioned upper slag discharge system for vertical shaft slag discharge, which includes the following steps:

S1. Arrange a first-level slag discharge pump in the cavity of the tunneling cutter head of the roadheader, and connect the first-level slag discharge pipeline to the location of the water slag separation equipment;

S2. Suspend multi-layer suspension plates for construction in the excavation shaft, and arrange secondary slag discharge pumps, slag paddle bins, grinding equipment, crushing equipment, water slag separation equipment, and slag paddle bins on the suspension plates at different levels water supply pipes;

S3. The secondary slag discharge pipeline of the secondary slag discharge pump is connected to the sedimentation tank, and the clear water in the sedimentation tank is returned to the excavation face for recycling through the return pipeline;

S4. The slag produced by the roadheader during the excavation process falls into the inner cavity of the excavation cutter head, and is mixed with the water returned from the sedimentation tank to form a multi-scale slag slurry. When the slag slurry reaches the set depth, the first-stage slag discharge pump will It is pumped to the water slag separation equipment;

S5. In the water slag separation equipment, the rock slag with a particle size of ≤0.4mm and water directly enter the slag paddle bin and the large-scale rock slag enters the crushing equipment. After crushing, the rock slag with a particle size of less than 8mm enters the grinding equipment. The rock slag with a particle size of <0.4mm enters the slag paddle bin, and the water supplied by the water supply pipe is stirred into a slag slurry by the stirring device in the slag paddle bin, and the water supply is controlled according to the signal fed back by the slag slurry concentration sensor in the slag paddle bin The opening and closing of the valve in the pipe to control the slurry to always remain within the set concentration range;

S6. The opening and closing of the outlet valve of the slurry chamber is controlled by the signal fed back by the high liquid level sensor and the low liquid level sensor in the slurry chamber. The slag pipeline is pumped to the sedimentation tank;

S7. The precipitated rock slag is loaded on a truck and transported to the utilization site, and the precipitated clear water returns to the excavation face through the return water pipeline (32), and the cycle repeats like this.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

According to the characteristics of high proportion of small-scale rock slag and low proportion of large-scale rock slag in the construction of full-face tunnel boring machine, the present invention adopts the first-stage slag discharge pump to lift the multi-scale slag vertically in a short distance to the second-level slag discharge on the suspension plate After the unit, the large-scale rock slag is crushed and ground into small-scale rock slag by graded crushing, and together with the previously separated small-scale rock slag, it is directly transported to the ground by a high-lift slag discharge pump. The invention eliminates the problem that it is difficult to set up a relay station in the wellbore, and solves the problem of system reliability; after eliminating the large-scale rock slag, the problem of pipe plugging is effectively solved; the mud circulation is changed to water circulation, and the energy consumption is greatly reduced; the slag discharge system can realize high efficiency Continuous operation lays a solid foundation for intelligent and efficient well construction.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of the present invention; due to the limitation of the length of A4, Fig. 1 is divided into three parts for the convenience of showing the structure of the present invention, and Fig. 2-4 are respectively the parts of A, B and C of Fig. 1 picture.

Labels in the figure: 11 primary slag discharge pump, 12 primary slag discharge pipeline, 21 water slag separation equipment, 22 crushing equipment, 23 grinding equipment, 24 slag paddle bin, 25 secondary slag discharge pump, 26 secondary slag discharge Pipeline, 241 water supply pipe, 242 stirring device, 243 high liquid level sensor, 244 low liquid level sensor, 245 slurry concentration sensor, 3 sedimentation tank, 31 partition, 32 return water pipeline, 4 roadheader cutter head, 5 suspension plate .

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways:

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 in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment: Referring to the accompanying drawings, the upper slag discharge system of the present invention is suitable for use in shaft shafts of full-face roadheaders, and includes:

The first-level slag discharge unit, the second-level slag discharge unit, and the control system;

Among them, the first-level slag discharge unit includes a first-level slag discharge pump 11 and a first-level slag discharge pipeline 12. Rock slag and water are discharged upward to the secondary slag discharge unit;

The above-mentioned secondary slag discharge unit includes water slag separation equipment 21, crushing equipment 22, grinding equipment 23, slag paddle bin 24 and secondary slag discharge pump 25 arranged from top to bottom. Layer hanging tray.

The inlet of the water slag separation device 21 is connected to the primary slag discharge pipeline 12, the rock slag outlet is connected to the crushing equipment, and the water outlet (fine slag outlet) is connected to the slag paddle bin 24;

The inlet of the grinding equipment 23 is connected to the rock slag outlet of the water slag separation equipment, and the outlet of the grinding equipment 23 is connected to the slag paddle bin 24;

The slurry in the slurry bin 24 is pumped to the ground by the secondary slag discharge pump 25.

In a specific application, a sedimentation tank 3 is provided on the ground, and the secondary slag discharge pipeline 26 of the secondary slag discharge pump 25 is connected to the sedimentation tank 3, and a partition 31 is provided in the sedimentation tank 3, and the clean water after the partition passes through the return pipe The road 32 is returned to the excavation face for recycling.

In order to keep the slurry in the slurry bin at an appropriate concentration all the time, the slurry bin 24 is also connected with a water supply pipe 241, and a stirring device 242, a high liquid level sensor 243, and a low liquid level sensor are also arranged in the slurry bin 24. 244 and the slurry concentration sensor 245, each sensor and the electromagnetic valve controlling the on-off of the water supply pipe 241 are all electrically connected with the control system.

The working process and working method of the present invention generally include the following steps, wherein some conventional construction steps are omitted here, and need not be repeated.

S1. Arrange a primary slag discharge pump 11 in the cavity of the tunneling cutter head of the roadheader, and connect the primary slag discharge pipeline 12 to the location of the water slag separation equipment 21 .

S2. Suspend the multi-layer suspension pan 5 for construction in the excavation shaft, and arrange the secondary slag discharge pump 25, the slag paddle bin 24, the grinding equipment 23, and the crushing equipment 22 sequentially from bottom to top on the suspension pans at different levels 1. Water slag separation equipment 21, arrange the water supply pipe 241 of the slag paddle bin 24 and other equipment, and connect the corresponding pipelines, install suitable valves, and connect the inlet and outlet between the equipment and other preparations.

S3, wherein, the secondary slag discharge pipeline 26 of the secondary slag discharge pump 25 is connected to the sedimentation tank 3, and the clear water in the sedimentation tank 3 is returned to the excavation work face through the return water pipeline 32;

S4. The slag produced by the roadheader during the excavation process falls into the inner cavity of the excavation cutter head, and mixes with the water returned from the sedimentation tank to form a multi-scale slag slurry. When the slag slurry reaches the set depth, the first-stage slag discharge pump 11 It is pumped to the water slag separation equipment 21;

S5. In the water and slag separation equipment 21, rock slag with a particle size of ≤0.4 mm and water directly enter the slag paddle bin 24 through the pipeline, and large-scale rock slag enters the crushing equipment 22. After crushing, rock slag with a particle size of less than 8 mm After entering the grinding equipment 23, the rock slag with a particle size of less than 0.4mm after grinding enters the slag paddle bin 24, and the water supplied by the water supply pipe 241 is stirred into a slag slurry by the stirring device 242 in the slag paddle bin. The signal fed back by the slurry concentration sensor 245 controls the opening and closing of the valve in the water supply pipe 241, so that the slurry is always kept within the set concentration range;

S6. The opening and closing of the outlet valve of the slurry bin 24 is controlled by the signals fed back by the high liquid level sensor 243 and the low liquid level sensor 244 in the slurry bin 24, and the slurry with a suitable concentration is sent from the outlet of the slurry bin to the secondary slag discharge pump 25 , pumped to the sedimentation tank 3 through the secondary slag discharge pipeline 26;

S7. The precipitated rock slag is loaded on a truck and transported to the utilization site, and the precipitated clean water is returned to the excavation face through the return water pipeline 32, and so on.

Among them, the centralized control center is located on the ground, and the control system in it is connected to various equipment, pumps, valves, sensors, etc. through control cables, and the control slag discharge system realizes automatic continuous operation and can be unattended.

It should be noted that the parts not described in detail in the present invention belong to the well-known technologies in the art, or can be purchased directly from the market, and those skilled in the art can obtain them without creative work. There are extremely wide applications in life, so I won't go into details here.

In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (7)

1. A slag discharge system on a shaft full-face boring machine, characterized in that it comprises: The first-level slag discharge unit, the second-level slag discharge unit, and the control system; The primary slag discharge unit includes a primary slag discharge pump (11) and a primary slag discharge pipeline (12). The pipeline (12) discharges multi-scale rock slag and water upwards to the secondary slag discharge unit; The secondary slag discharge unit includes water slag separation equipment (21), crushing equipment (22), grinding equipment (23), slag paddle bin (24) and secondary slag discharge pump (25) arranged from top to bottom; The inlet of the water slag separation equipment (21) is connected to the primary slag discharge pipeline (12), the rock slag outlet is connected to the crushing equipment, and the water outlet is connected to the slag paddle bin (24); The inlet of the grinding equipment (23) is connected to the rock slag outlet of the water slag separation equipment, and the outlet of the grinding equipment (23) is connected to the slag paddle bin (24); The slurry in the slag slurry bin (24) is pumped to the ground by the secondary slag discharge pump (25). 2. The slag discharge system on a shaft full-face boring machine according to claim 1, characterized in that a sedimentation tank (3) is provided on the ground, and the secondary slag discharge pipe of the secondary slag discharge pump (25) The road (26) is connected to the sedimentation tank (3), and a partition (31) is provided in the sedimentation tank (3), and the clean water after the partition is returned to the excavation face for recycling through the return pipeline (32). 3. The slag discharge system on a shaft full-face boring machine according to claim 1, characterized in that, the slag paddle bin (24) is also connected with a water supply pipe (241), and there is also a water supply pipe (241) in the slag paddle bin (24). A stirring device (242), a high liquid level sensor (243), a low liquid level sensor (244) and a slurry concentration sensor (245) are provided, each of the sensors and the electromagnetic valve controlling the on-off of the water supply pipe (241) are connected with the The control system is electrically connected. 4. The slag discharge system on a shaft full-face tunneling machine according to claim 1, characterized in that, in the water slag separation device (21), rock slag with a particle size of ≤0.4mm and water directly pass through the pipeline Enter the slag slurry bin (24). 5. The slag discharge system on a shaft full-face tunneling machine according to claim 1, characterized in that, in the crushing equipment (22), the rock slag with a particle size of less than 8mm after crushing enters the grinding equipment (twenty three). 6. The slag discharge system on a shaft full-face boring machine according to claim 5, characterized in that, in the grinding equipment (23), the slag with a slag particle size <0.4mm enters the slag paddle bin after grinding In (24), the slurry formed after stirring is pumped to the sedimentation tank (3) by the secondary slag discharge pump (25). 7. A method for discharging slag on a vertical shaft using the upper slag discharge system according to any one of claims 1-6, characterized in that it comprises the following steps: S1. Arrange a primary slag discharge pump (11) in the cavity of the tunneling cutter head of the roadheader, and connect the primary slag discharge pipeline (12) to the location of the water slag separation equipment (21); S2. Suspend multi-layer suspension plates for construction in the excavation shaft, and arrange secondary slag discharge pumps (25), slag paddle bins (24), grinding equipment (23), and crushing equipment ( 22), water slag separation equipment (21), arrange the water supply pipe (241) of the slag paddle bin (24); S3. The secondary slag discharge pipeline (26) of the secondary slag discharge pump (25) is connected to the sedimentation tank (3), and the clear water in the sedimentation tank (3) is returned to the excavation face for circulation through the return pipeline (32) use; S4. The slag produced by the roadheader during the excavation process falls into the inner cavity of the excavation cutter head, and is mixed with the water returned from the sedimentation tank to form a multi-scale slag slurry. When the slag slurry reaches the set depth, the first-stage slag discharge pump ( 11) pump it to the water slag separation equipment (21); S5. In the water slag separation equipment (21), the rock slag with a particle size of ≤0.4mm and water directly enter the slag paddle bin (24) and the large-scale rock slag enters the crushing equipment (22). After crushing, the rock slag with a particle size of <8mm The rock slag enters the grinding equipment (23), and the rock slag with a particle size of less than 0.4mm enters the slag paddle bin (24) after grinding, and the water supplied by the water supply pipe (241) is fed by the stirring device (242) in the slag paddle bin. Stir to form a slurry, and control the opening and closing of the valve in the water supply pipe (241) according to the signal fed back by the slurry concentration sensor (245) in the slurry tank, so as to control the slurry to always remain within the set concentration range; S6. The opening and closing of the outlet valve of the slurry bin (24) is controlled by the signals fed back from the high liquid level sensor (243) and the low liquid level sensor (244) in the slurry bin (24), and the slurry with a suitable concentration is fed from the slurry bin (24). It is exported to the secondary slag discharge pump (25), and pumped to the sedimentation tank (3) through the secondary slag discharge pipeline (26); S7. The precipitated rock slag is loaded on a truck and transported to the utilization site, and the precipitated clear water returns to the excavation face through the return water pipeline (32), and the cycle repeats like this.

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