A screw machine blowout prevention structure and method for shield construction

Abstract

The present application relates to a kind of spiral machine blowout prevention structure and method for shield construction, including belt conveyor, dovetail baffle being arranged in the both sides of belt conveyor and the shield spiral machine gate opposite to belt conveyor, further including guide cabin, guide cabin is welded by inclined bottom plate, back plate and two side plates, the top and front of guide cabin are open mouth shape, the front opening of guide cabin faces the conveying direction of belt conveyor, the top opening of guide cabin is connected with shield spiral machine gate, three triangular plates are welded on the two side plates of guide cabin, and guide cabin is welded and fixed on dovetail baffle by triangular plate;Front opening of guide cabin is equipped with leather curtain, and the top of leather curtain is fixed;Using the technical scheme, muck and / or slurry fall into guide cabin through shield spiral machine gate, and muck and / or slurry are guided to the conveying belt by the inclined bottom plate of guide cabin, and the leather curtain at the front opening of guide cabin suppresses the splashing of slurry, greatly reduces the blowout intensity.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) construction technology, and specifically to a spiral conveyor anti-gushing structure and method for TBM construction. Background Technology

[0002] During the tunnel boring machine (TBM) construction, when encountering water-rich strata (such as moderately or slightly weathered rock layers with fissure water), the high-pressure water flows through the soil chamber and screw conveyor, forming a concentrated seepage flow. This causes the particles in the soil chamber to surge and gush out from the screw conveyor gate. The large amount of mud and water severely affects the working area between the shield tail and the equipment bridge. The amount of excavated soil is large and the time required is long, which seriously affects the construction progress.

[0003] The occurrence of gushing not only affects the normal construction of soil removal and the control of pressure in the soil chamber, but in severe cases it can also carry out too much soil and sand around the excavation face, causing over-excavation and construction accidents such as surface subsidence and collapse.

[0004] In existing technology, the shield tunneling machine's auger gate faces the muck conveyor belt. When no gushing occurs, the muck falls from the auger gate onto the conveyor belt. Dovetail baffles on both sides of the conveyor belt prevent muck from falling outside the belt during its descent. (See attached image.) Figure 1 and attached Figure 2 As shown, when a gushing occurs, mud gushes out from the shield tunneling machine's auger gate, splashing everywhere. The dovetail baffles on both sides of the conveyor belt are unlikely to be effective in blocking it. Currently, there are no preventative technical measures at the shield tunneling machine's auger gate to prevent gushing. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to make up for the shortcomings of the prior art and provide a spiral machine anti-blowout structure and method for shield tunneling.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] A blowout prevention structure for a spiral conveyor used in tunnel boring machine (TBM) construction includes a belt conveyor, dovetail baffles on both sides of the belt conveyor, and a TBM spiral conveyor gate facing the belt conveyor. The structure is characterized by: a guide cabin, which is welded from a sloping bottom plate, a rear plate, and two side plates. The top and front of the guide cabin are open, with the front opening facing the conveying direction of the belt conveyor. The top opening of the guide cabin is connected to the TBM spiral conveyor gate. Triangular plates are welded to both side plates of the guide cabin, and the guide cabin is fixed to the dovetail baffles by welding the triangular plates. A curtain is provided at the front opening of the guide cabin, with the top of the curtain fixed.

[0008] Furthermore, the angle between the inclined bottom plate and the rear plate of the guide cabin is 115° to 120°.

[0009] Furthermore, a connecting flange is provided at the top opening of the guide cabin, which is used for a sealed connection with the shield tunneling auger gate.

[0010] Furthermore, it also includes a tray and a screw conveyor. The tray is located below the belt conveyor and includes a receiving trough and an outlet communicating with the receiving trough. The screw conveyor is located beside the belt conveyor and includes a receiving hopper and a conveying pipe. The slurry flowing out of the outlet of the tray falls into the receiving hopper of the screw conveyor. The screw conveyor is used to convey the slurry in the receiving hopper to the conveyor belt in front of the guide chamber.

[0011] Furthermore, the tray is provided with multiple hanging holes, through which the tray is fixed to adjacent equipment.

[0012] Furthermore, the front of the tray is located below the guide compartment, and the rear of the tray is located below the rear of the belt conveyor.

[0013] A blowout prevention method employing the blowout prevention structure for a auger conveyor used in tunnel boring machine construction as described above includes the following steps:

[0014] S1: Excavated soil and / or mud fall into the guide chamber through the shield tunneling auger gate;

[0015] S2: The slag and / or mud continue to fall along the inclined bottom plate by their own weight, push open the leather curtain, and fall onto the conveyor belt of the belt conveyor through the front opening of the guide chamber.

[0016] S3: The belt conveyor transports the excavated soil and / or slurry into the locomotive's hopper.

[0017] Furthermore, it also includes the following steps:

[0018] S4: Mud that was not transported to the locomotive's hopper fell into the tray;

[0019] S5: The slurry in the tray flows out through the outlet to the receiving hopper of the screw conveyor;

[0020] S6: The screw conveyor transports the slurry in the receiving hopper to the conveyor belt in front of the guide chamber.

[0021] The beneficial effects that this invention can achieve are as follows:

[0022] 1) The structure of the shield tunneling auger gate, i.e. the slag outlet, has been improved. Slag and / or mud fall into the guide chamber through the shield tunneling auger gate. The slag and / or mud are guided to the conveyor belt through the inclined bottom plate of the guide chamber. The skin curtain at the front opening of the guide chamber suppresses the splashing of mud and greatly reduces the intensity of the gushing.

[0023] 2) Mud that is not conveyed to the locomotive hopper falls into the tray, flows out through the tray outlet to the receiving hopper of the screw conveyor, is conveyed by the screw conveyor to the conveyor belt, and is then conveyed into the locomotive hopper. This greatly reduces the amount of mud and sand to be cleaned, reduces the cleaning intensity of workers, and improves construction efficiency.

[0024] 3) Effectively prevents gushing, making it easier for the tunnel boring machine operator to control the amount of excavated soil and avoid over-excavation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the existing technology;

[0026] Figure 2 yes Figure 1 View from direction A;

[0027] Figure 3 This is a three-dimensional schematic diagram of an embodiment of the present invention;

[0028] Figure 4 This is a front view schematic diagram of an embodiment of the present invention;

[0029] Figure 5 yes Figure 4 View from direction B;

[0030] Figure 6 This is a perspective view of the guide cabin in an embodiment of the present invention;

[0031] Figure 7 This is a front view of the guide cabin in an embodiment of the present invention;

[0032] Figure 8 This is a left view of the guide cabin in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the guide cabin and the curtain in an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the tray in an embodiment of the present invention;

[0035] In the diagram: 1-Belt conveyor, 2-Dovetail baffle, 3-Shield tunneling machine gate.

[0036] 4-Guide cabin, 41-Inclined bottom plate, 42-Side plate, 43-Rear plate, 44-Connecting flange, 45-Triangle plate, 46-Leather curtain, 5-Tray, 51-Storage slot, 52-Outlet, 53-Hanging hole, 6-Screw conveyor. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Example

[0038] like Figures 3-5 As shown, a spiral conveyor anti-spillage structure for shield tunneling includes a belt conveyor 1, dovetail baffles 2 set on both sides of the belt conveyor 1, and a shield spiral conveyor gate 3 facing the belt conveyor 1. It also includes a guide cabin 4, a tray 5, and a spiral conveyor 6.

[0039] like Figures 6-9 As shown, the guide cabin 4 is welded from an inclined bottom plate 41, a rear plate 43, and two side plates 42. The angle between the inclined bottom plate 41 and the rear plate 43 of the guide cabin 4 is 115° to 120°. The top and front of the guide cabin 4 are open. The front opening of the guide cabin 4 faces the conveying direction of the belt conveyor 1. A connecting flange 44 is provided at the top opening of the guide cabin 4. The connecting flange 44 is used for sealing connection with the shield tunneling auger gate 3. Triangular plates 45 are welded on both side plates 42 of the guide cabin 4. The guide cabin 4 is fixed to the dovetail baffle 2 by welding the triangular plates 45. A leather curtain 46 is provided at the front opening of the guide cabin 4. The top of the leather curtain 46 is fixed.

[0040] The tray 5 is positioned below the belt conveyor 1. The tray 5 includes a storage slot 51 and an outlet 52 communicating with the storage slot 51, such as... Figure 10 As shown, the pallet 5 is provided with multiple hanging holes 53, and the pallet 5 is fixed to the adjacent equipment through the hanging holes 5; the front of the pallet 5 is located below the guide cabin 4, and the rear of the pallet 5 is located below the rear of the belt conveyor 1.

[0041] The screw conveyor 6 is located beside the belt conveyor 1. The screw conveyor 6 includes a receiving hopper and a conveying pipe. The receiving hopper is used to receive the slurry flowing out from the outlet 52 of the tray 5. The screw conveyor 6 is used to convey the slurry in the receiving hopper to the conveyor belt in front of the guide chamber 4.

[0042] The blowout prevention method using the above-mentioned blowout prevention structure for the screw conveyor used in tunnel boring machine construction includes the following steps:

[0043] S1: Excavated soil and / or mud fall into the guide chamber 4 through the shield tunneling auger gate 3;

[0044] S2: The slag and / or mud continue to fall along the inclined bottom plate 41 by their own weight, opening the leather curtain 46, and falling onto the conveyor belt of the belt conveyor device 1 through the front opening of the guide chamber 4.

[0045] S3: The belt conveyor 1 transports the excavated soil and / or mud into the locomotive's hopper.

[0046] S4: Mud that was not transported to the locomotive's hopper fell into tray 5;

[0047] S5: The slurry in tray 5 flows out through outlet 52 into the receiving hopper of screw conveyor 6;

[0048] S6: The screw conveyor 6 transports the slurry in the receiving hopper to the conveyor belt in front of the guide chamber 4.

[0049] Advantages of this embodiment:

[0050] 1) The structure of the shield tunneling auger gate, i.e. the slag outlet, has been improved. Slag and / or mud fall into the guide chamber through the shield tunneling auger gate. The slag and / or mud are guided to the conveyor belt through the inclined bottom plate of the guide chamber. The skin curtain at the front opening of the guide chamber suppresses the splashing of mud and greatly reduces the intensity of the gushing.

[0051] 2) Mud that is not conveyed to the locomotive hopper falls into the tray, flows out through the tray outlet to the receiving hopper of the screw conveyor, is conveyed by the screw conveyor to the conveyor belt, and is then conveyed into the locomotive hopper. This greatly reduces the amount of mud and sand to be cleaned, reduces the cleaning intensity of workers, and improves construction efficiency.

[0052] 3) Effectively prevents gushing, making it easier for the tunnel boring machine operator to control the amount of excavated soil and avoid over-excavation.

[0053] In the description of this invention, terms such as "inner," "outer," "upper," "lower," "front," and "rear," which indicate orientation or positional relationship, are used only for the convenience of describing this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] The above description is only one embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A screw machine blowout prevention structure for shield construction, comprising a belt conveyor (1), dovetail baffles (2) arranged on both sides of the belt conveyor (1), and a shield screw machine gate (3) facing the belt conveyor (1), characterized in that: It also includes a guide cabin (4), which is welded together from a sloping bottom plate (41), a rear plate (43) and two side plates (42). The top and front of the guide cabin (4) are open. The front opening of the guide cabin (4) faces the conveying direction of the belt conveyor (1). The top opening of the guide cabin (4) is connected to the shield tunneling auger gate (3). Triangular plates (45) are welded on both side plates (42) of the guide cabin (4). The guide cabin (4) is fixed to the dovetail baffle (2) by welding the triangular plates (45). A curtain (46) is provided at the front opening of the guide cabin (4). The top of the curtain (46) is fixed. When the curtain (46) hangs down naturally, the bottom of the curtain (46) is attached to the sloping bottom plate (41). The top opening of the guide cabin (4) is provided with a connecting flange (44), which is used to seal the connection with the shield tunneling auger gate (3); It also includes a tray (5) and a screw conveyor (6). The tray (5) is located below the belt conveyor (1). The tray (5) includes a receiving trough (51) and an outlet (52) communicating with the receiving trough (51). The screw conveyor (6) is located on the side of the belt conveyor (1). The screw conveyor (6) includes a receiving hopper and a conveying pipe. The slurry flowing out from the outlet (52) of the tray (5) falls into the receiving hopper of the screw conveyor (6). The screw conveyor (6) is used to convey the slurry in the receiving hopper to the conveyor belt in front of the guide chamber (4). The tray (5) is provided with multiple hanging holes (53), and the tray (5) is fixed to the adjacent equipment through the hanging holes (53); The front of the tray (5) is located below the guide compartment (4), and the rear of the tray (5) is located below the rear of the belt conveyor (1). The methods for preventing blowouts include the following steps: S1: Excavated soil and / or mud fall into the guide chamber (4) through the shield tunneling auger gate (3); S2: The slag and / or mud continue to fall along the inclined bottom plate (41) by their own weight, opening the leather curtain (46) and falling onto the conveyor belt of the belt conveyor device (1) through the front opening of the guide chamber (4); S3: Belt conveyor (1) transports slag and / or mud into the locomotive hopper; S4: The mud that was not transported to the locomotive hopper fell into the tray (5); S5: The slurry in the tray (5) flows out through the outlet (52) into the receiving hopper of the screw conveyor (6); S6: The screw conveyor (6) transports the mud in the receiving hopper to the conveyor belt in front of the guide chamber (4); The angle between the inclined bottom plate (41) and the rear plate (43) of the guide cabin (4) is 115° to 120°.

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