Large-longitudinal-slope large-corner sand shale interbed shield continuous belt muck rapid transportation system

Abstract

The utility model belongs to the field of tunnel engineering, and relates to a large-longitudinal-slope large-corner sand shale interbed shield continuous belt muck rapid conveying system. The system comprises a tunneling module, a transmission module, a feeding module and a positioning module. The tunneling system is used for soil tunneling and muck obtaining and comprises a cutterhead, a front shield and a shield shell. The transmission system realizes one-time transportation of muck, and comprises a spiral conveyor in the front shield, a transmission port formed in the second partition plate, a transmission belt penetrating through the transmission port, a motor located on the rightmost side of the second partition plate, and a rotating shaft bypassing the transmission belt; the feeding system mixes muck into slurry and sends the muck out through a slurry pump and comprises a material guide opening below the transmission belt, a jet flow pipeline above the transmission belt and a pumping pipeline below the material guide opening. The positioning system is used for achieving movement of the feeding system and comprises a second pulley and a transverse guide rail. Shield muck under the condition of large longitudinal slope and large corner can be effectively output, the jet velocity of different sand shale contents can be adaptively adjusted, waste of muck turnover is reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of tunnel engineering, in particular to a large longitudinal slope and large turning angle sand-mudstone interlayer shield continuous belt slag rapid transportation system. Background Art

[0002] By the end of 2021, the total length of railway tunnels included in the construction plan in my country is 15,266 kilometers, and 362 extra-long railway tunnels are planned with a total length of 5,359 kilometers. Faced with the broad prospects of tunnel construction, the shield method, as one of the main methods of tunnel construction, also faces the following challenges:

[0003] 1. The construction of long tunnels over 1,000 meters has increased, such as the Xingtian section of Chengdu Metro Line 18 (about 4,500 meters long) and the Lunda shield section tunnel of Guangzhou Metro Line 4 (2,301 meters long). Long-distance tunnels extend the slag transportation system, reduce slag discharge efficiency, and affect the construction period.

[0004] 2. The number of tunnels with a longitudinal slope of more than 30‰ has increased. The large longitudinal slope plus the long transportation distance have greatly increased the difficulty of laying out the traditional slag transportation system, causing slag discharge problems in the shield system and limiting the excavation speed of the shield system.

[0005] 3. The alternating sandstone and mudstone strata cause the slag to be highly sticky and wet, which can easily cause the slag to stick to the transportation system during transportation. There is also a certain height difference between the slag outlet and the slag truck. If the slag is directly dumped on the truck after transportation, the larger particle size slag will affect the truck, and the sticky slag will produce a lot of adhesion in the truck, seriously affecting the output and transportation of the slag. Summary of the invention

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a shield tunneling continuous belt slag rapid transportation system for sand-shale interlayers with large longitudinal slopes and large turning angles. The conveying belt is cleaned by introducing a water jet, and the slag is mixed into a slurry, which is pumped out of the tunnel in the form of slurry, rather than being output in the form of slag in the traditional way. The device can realize the rapid output of slag in sand-shale interlayers over long distances and with large longitudinal slopes, thereby optimizing construction efficiency.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The shield machine continuous belt slag rapid transportation system for large longitudinal slope and large turning angle sand-mudstone interlayers includes a tunneling system, a transmission system, a feeding system, and a positioning system.

[0009] The tunneling system is composed of a cutter disc (101), a front shield (102), and a shield shell (103). The cutter disc (101) is located at the leftmost side of the tunneling system and is a welded component. The front shield (102) is located on the right side of the cutter disc (101) and is welded by a first partition plate (104), a front shield shell (105), a screw conveyor connecting seat (106), and a second partition plate (107). The first partition plate (104) is located at the leftmost side of the front shield (102). The front shield shell (105) is a seamless steel casting. The screw conveyor connecting seat (106) is located on the right side of the first partition plate (104). The second partition plate (107) is located at the rightmost side of the front shield (102). The shield shell (103) is connected to the right front shield (102) by high-strength bolts.

[0010] The transmission system is composed of a screw conveyor (201), a transmission port (202), a transmission belt (203), a motor (204), and a rotating shaft (205); the screw conveyor (201) is hingedly connected to a screw conveyor connecting seat (106) and is located inside a front shield shell (105); the transmission port (202) is provided on a second partition plate (107); the transmission belt (203) is located below an outlet of the screw conveyor (201); the transmission belt (203) conveys the sand, mudstone, and slag mixed material of the screw conveyor (201) to the top of the feeding system through the transmission port (202); the motor (204) is fixed to the rightmost side of the second partition plate (107) of the front shield to drive the transmission belt (203) to operate; there are two rotating shafts (205) in total, which are respectively located at two ends of the transmission belt (203).

[0011] The feeding system consists of a material guide port (301), a jet pipe (302), and a pumping pipe (303). The material guide port (301) is welded by four inverted isosceles trapezoidal steel plates tilted inwards at the top and four vertical rectangular steel plates at the bottom, and is located at the bottom of the rightmost side of the screw conveyor (201). The jet pipe (302) is located above the rightmost outer edge of the screw conveyor (201), and the pumping pipe (303) is located below the material guide port (301).

[0012] The positioning system consists of a second pulley (401) and a transverse guide rail (402). The second pulley (401) is welded to two on each side of the lower edge of the rectangular steel plate of the guide port (301). The transverse guide rail (402) is located below the second pulley (401) and contacts the second pulley (401).

[0013] Furthermore, the rear opening of the cutter disc (101) is tilted inwards, which is beneficial to the flow and transportation of the slag. Furthermore, the inclination angle of the screw conveyor (201) is 21.5°.

[0014] Furthermore, the transmission belt (203) is composed of a first pulley (206), an upper crawler belt (207), and a lower crawler belt (208), and the surfaces of all components of the transmission belt (203) are sprayed with anti-corrosion materials.

[0015] Furthermore, a 30-35 cm center hole is provided at the centroid position of the rectangular space enclosed by the material guide port (301) for docking with the pumping pipeline (303).

[0016] Furthermore, a spiral stirrer (304) is provided in the rectangular space inside the material guide port (301).

[0017] Furthermore, the jet pipes (302) are evenly distributed horizontally along the rightmost outer edge of the transmission belt (203), and the vertical distance between the jet ports (305) and the crawler track overlying the transmission belt (203) is maintained at more than 1 meter.

[0018] Furthermore, the diameter of the jet port (305) of the jet pipe (302) is 25-30 mm.

[0019] Furthermore, the velocity of the water jetted from the jet pipe (302) can be adaptively adjusted according to geological conditions. The jet velocity in a stratum dominated by sandstone is greater than 12 meters per second, and the jet velocity in a stratum dominated by mudstone is greater than 15 meters per second.

[0020] Furthermore, after the pumping pipeline (302) pumps out the slurry formed by the slag and the jetting water body, the pumped slurry can be added with an admixture and reused as a curing agent.

[0021] Beneficial effects of the utility model:

[0022] 1. The utility model provides a large longitudinal slope and large turning angle sand-mudstone interlayer shield continuous belt slag rapid transportation system, which uses a jet pipe to erode the slag at the edge of the transmission belt, so that the slag enters the lower material guide port, and the jet speed is adaptively adjusted according to the sand and mudstone content, which effectively prevents the sand and mudstone slag from sticking to the transmission belt and reduces the loss during the slag transportation process, which is beneficial to improving the slag transportation efficiency.

[0023] 2. The utility model provides a large-slope, large-angle, sand-mudstone interlayer shield continuous belt slag rapid transportation system, which mixes sand-mudstone slag with water to form slurry. The slurry can be quickly transported by changing the pumping suction pressure, and the pumping pipeline can change the output direction according to actual needs, which is beneficial to the slag output of the fast excavation shield machine under long-distance and large-slope conditions.

[0024] 3. The utility model provides a shield tunneling continuous belt rapid transportation system for interlayered sand and mudstone with large longitudinal slope and large turning angle. The shield tunneling slag is further crushed and stirred by a spiral agitator in the material guide port to form a slurry with water. After pumping, stabilizers and other additives can be added to form filling materials and solidified materials for further reuse, thereby reducing construction costs, realizing waste utilization, and reducing carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of a large longitudinal slope and large turning angle sand-mudstone interlayer shield continuous belt slag rapid transportation system provided by the utility model.

[0026] Figure 2 It is a three-dimensional schematic diagram of one side of the excavation system of the large longitudinal slope and large turning angle sand-mudstone interlayer shield continuous belt slag rapid transportation system provided by the utility model.

[0027] Figure 3 It is a plan view of a tunneling system provided by the utility model.

[0028] Figure 4 It is a schematic diagram of a transmission belt provided by the utility model.

[0029] Figure 5 It is a schematic diagram of a jet pipeline provided by the utility model.

[0030] In the figure: 101, cutter head. 102, front shield. 103, shield casing. 104, first partition. 105, front shield casing. 106, screw conveyor connection seat. 107, second partition. 201, screw conveyor. 202, transmission port. 203, transmission belt. 204, motor. 205, rotating shaft. 206, first pulley. 207, upper crawler. 208, lower crawler. 301, material guide port. 302, jet pipe. 303, pumping pipe. 304, spiral agitator. 305, jet port. 401, second pulley. 402, transverse guide rail. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the drawings, rather than all structures.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "fixed" 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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between 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.

[0033] In the description of the present invention, it should be understood that the terms "inside", "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] like Figure 1 and Figure 2 As shown, the utility model provides a large longitudinal slope and large turning angle sand-mudstone interlayer shield continuous belt slag rapid transportation system, which includes four component systems: a tunneling system, a transmission system, a feeding system, and a positioning system.

[0035] like Figure 1-Figure 3 As shown, the tunneling system is composed of a cutterhead (101), a front shield (102), and a shield shell (103), which are responsible for tunnel excavation and provide the overall structure of the device. The cutterhead (101) is located on the leftmost side of the tunneling system and is a welded component. The front shield (102) is located on the right side of the cutterhead (101) and is welded by a first partition (104), a front shield shell (105), a screw conveyor connection seat (106), and a second partition (107). The first partition (104) is located on the leftmost side of the front shield (102) and is used to divide the spatial position of the cutterhead (101) and the front shield (102). The front shield shell (105) is a seamless steel casting and is used to support the front shield structure (102). The screw conveyor (201) connection seat (106) is located on the right side of the first partition (104) plate and is a hinged support. The second partition (107) is located on the rightmost side of the front shield (102) and is used to divide the spatial position of the tunneling system. The shield casing (103) is connected to the right front shield (102) by high-strength bolts.

[0036] like Figure 1 and Figure 3As shown, the transmission system is composed of a screw conveyor (201), a transmission port (202), a transmission belt (203), a motor (204), and a rotating shaft (205). The screw conveyor (201) is hinged with the screw conveyor connection seat (106) and is located inside the front shield shell (105). The transmission port (202) is opened at the second partition (107), and the transmission belt (203) is located below the outlet of the screw conveyor (201) to realize the one-time transportation of the slag. The transmission belt (203) conveys the sand and mudstone mixed slag material of the screw conveyor (201) to the top of the feeding system through the transmission port (202). The motor (204) is fixed to the rightmost side of the second partition (107) of the front shield to drive the transmission belt (203) to operate. There are two rotating shafts (205) respectively located at the left and right ends of the transmission belt (203) to realize the steering of the crawler of the transmission belt (203).

[0037] like Figure 2 As shown, the feeding system consists of a feed inlet (301), a jet pipe (302), and a pumping pipe (303). The feed inlet (301) is welded by four inverted isosceles trapezoidal steel plates tilted inward at the top and four vertical rectangular steel plates at the bottom. It is located at the rightmost bottom of the screw conveyor (201) to collect the debris falling from the transmission belt (203). The jet pipe (302) is located above the rightmost outer edge of the screw conveyor (201) to provide the liquid required for the slurry and to flush and clean the crawler belt. The pumping pipe (303) is located below the feed inlet (301) to realize the secondary transportation and pumping of the debris.

[0038] like Figure 2 As shown, the positioning system is composed of a second pulley (401) and a transverse guide rail (402) to achieve spatial position adjustment of the guide port (301). The second pulley (401) is welded to the lower edge of the rectangular steel plate of the guide port (301).

[0039] like Figure 3 As shown, the rear opening of the cutter disc (101) is inclined inwards, which is beneficial to the flow and transportation of the debris.

[0040] like Figure 3 As shown, the inclination angle of the screw conveyor (201) is 21.5°.

[0041] like Figure 4 As shown, the transmission belt (203) is composed of a first pulley (206), an upper crawler belt (207), and a lower crawler belt (208), and the surfaces of all components of the transmission belt (203) are sprayed with anti-corrosion materials.

[0042] like Figure 5 As shown, a 30-35 cm center hole is provided at the centroid position of the rectangular space enclosed by the material guide port (301) for docking with the pumping pipeline (303).

[0043] like Figure 1 As shown, a spiral stirrer (304) is arranged in the rectangular space inside the material guide port (301) to further cut and mix the solid phase slag and the liquid phase fluid.

[0044] like Figure 5 As shown, the jet pipes (302) are evenly distributed horizontally along the rightmost outer edge of the transmission belt (203) and the vertical distance between the jet port (305) and the crawler track overlying the transmission belt (203) is maintained at more than 1 meter.

[0045] like Figure 5 As shown, the diameter of the jet port (305) of the jet pipe (302) is 25-30 mm. The velocity of the water jetted from the jet pipe (302) can be adaptively adjusted according to geological conditions. The jet velocity in a stratum dominated by sandstone is greater than 12 meters per second, and the jet velocity in a stratum dominated by mudstone is greater than 15 meters per second.

[0046] like Figure 5 As shown, after the pumping pipeline (303) pumps out the slurry formed by the slag and the jetting water body, the pumped slurry can be added with an admixture as a curing agent for repeated use.

[0047] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For technicians in this technical field, any substitution, improvement or change made to the implementation manner of the present utility model without departing from the technical principle of the present utility model shall fall within the protection scope of the present utility model.

[0048] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slopes and large turning angles, characterized in that: include: Excavation system, transmission system, feeding system, positioning system; The tunneling system is composed of a cutterhead (101), a front shield (102), and a shield shell (103); the cutterhead (101) is located at the leftmost side of the tunneling system and is a welded component; the front shield (102) is located at the right side of the cutterhead (101) and is welded by a first baffle (104), a front shield shell (105), a screw conveyor connection seat (106), and a second baffle (107); the first baffle (104) is located at the leftmost side of the front shield (102); the front shield shell (105) is a seamless steel casting; the screw conveyor connection seat (106) is located at the right side of the first baffle (104); the second baffle (107) is located at the rightmost side of the front shield (102); and the shield shell (103) is connected to the right front shield (102) by high-strength bolts; The transmission system is composed of a screw conveyor (201), a transmission port (202), a transmission belt (203), a motor (204), and a rotating shaft (205); the screw conveyor (201) is hingedly connected to the screw conveyor connecting seat (106) and is located inside the front shield shell (105); the transmission port (202) is opened on the second partition (107); the transmission belt (203) is located below the outlet of the screw conveyor (201); the transmission belt (203) conveys the sand, mudstone and slag mixed material of the screw conveyor (201) to the top of the feeding system through the transmission port (202); the motor (204) is fixed to the rightmost side of the second partition (107) of the front shield to drive the transmission belt (203) to operate; there are two rotating shafts (205) in total, which are respectively located at both ends of the transmission belt (203); The feeding system is composed of a material guide port (301), a jet pipe (302), and a pumping pipe (303); the material guide port (301) is formed by welding four inverted isosceles trapezoidal steel plates tilted inwards at the top and four vertical rectangular steel plates at the bottom, and is located at the bottom of the rightmost side of the screw conveyor (201); the jet pipe (302) is located above the rightmost outer edge of the screw conveyor (201); and the pumping pipe (303) is located below the material guide port (301); The positioning system consists of a second pulley (401) and a transverse guide rail (402). The second pulley (401) is welded to two on each side of the lower edge of the rectangular steel plate of the guide port (301). The transverse guide rail (402) is located below the second pulley (401) and contacts the second pulley (401).

2. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The rear opening of the cutter disc (101) is inclined inwards, which is beneficial to the flow and transportation of the debris.

3. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The inclination angle of the screw conveyor (201) is 21.5°.

4. The shield-tunneled continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The transmission belt (203) is composed of a first pulley (206), an upper crawler belt (207), and a lower crawler belt (208), and the surfaces of all components of the transmission belt (203) are sprayed with anti-corrosion materials.

5. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The guide port (301) has a 30-35 cm center hole at the centroid position of the rectangular space enclosed by the guide port (301) for connecting to the pumping pipeline (303).

6. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: A spiral stirrer (304) is arranged in the rectangular space inside the material guide port (301).

7. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The jet pipes (302) are evenly distributed horizontally along the rightmost outer edge of the transmission belt (203), and the vertical distance between the jet ports (305) and the crawler track overlying the transmission belt (203) is maintained at more than 1 meter.

8. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The diameter of the jet port (305) of the jet pipe (302) is 25-30 mm.

9. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1 is characterized in that: The velocity of the water jetted from the jet pipe (302) can be adaptively adjusted according to geological conditions. The jet velocity in a stratum dominated by sandstone is greater than 12 meters per second, and the jet velocity in a stratum dominated by mudstone is greater than 15 meters per second.

10. The shield-driven continuous belt rapid transportation system for sandstone and mudstone interlayers with large longitudinal slope and large turning angle as claimed in claim 1, characterized in that: After the pumping pipeline (303) pumps out the slurry formed by the slag and the jetting water body, the pumped slurry can be added with an admixture and reused as a curing agent.

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