Shield tunneling machine deslagging system and shield tunneling machine

Abstract

The utility model provides a deslagging system of a shield tunneling machine and the shield tunneling machine, and belongs to the technical field of tunneling equipment. The slag discharging system of the shield tunneling machine comprises a first-stage screw conveyor and a second-stage screw conveyor located on the rear side of the first-stage screw conveyor, the inclination degree of the first-stage screw conveyor is larger than that of the second-stage screw conveyor, a first gate is arranged on the lower side of the tail of the first-stage screw conveyor, a crushing device is connected below the first gate, and a second gate is arranged on the lower side of the tail of the second-stage screw conveyor. A muck conveying device is arranged below the second gate, the rear end of the first-stage screw conveyor is connected with the front end of the second-stage screw conveyor through a third gate, and the third gate is located on the rear side of the first gate. The deslagging system comprises the two screw conveyors, the crushing device is connected to the tail of the first-stage screw conveyor, the first-stage screw conveyor is obliquely arranged, and the arrangement space is larger when the first-stage screw conveyor is closer to the rear, so that the crushing device is convenient to arrange and install, the first-stage screw conveyor does not need to be excessively inclined, and arrangement of the first-stage screw conveyor and conveying of muck are convenient.

Description

Technical Field

[0001] The utility model relates to a shield machine slag discharging system and a shield machine, belonging to the technical field of tunnel excavation equipment. Background Art

[0002] With the rapid development of rail transit, the shield method has become the most important construction scheme for tunnel construction. When the geological conditions and surrounding environment are relatively complex, a single mode will have the problem of insufficient adaptability, and dual-mode or even multi-mode shield machines have come into being. The earth pressure / mud water dual-mode shield machine has both earth pressure mode and mud water mode, and switches between the two modes as needed. When the self-stability of the local stratum is good, the earth pressure balance mode can reduce construction costs and improve construction efficiency; when the self-stability of the local stratum is poor, the mud water balance mode can effectively control surface settlement and building (structure) deformation, so as to ensure safe and efficient construction.

[0003] However, gushing is prone to occur during excavation in the earth pressure mode, and the slurry discharge pipeline is easily stuck by large slag blocks during excavation in the mud water mode. The switching between the earth pressure mode and the mud water mode takes a long time and cannot be switched quickly. In this regard, the Chinese utility model patent with the authorization announcement number CN219366054U discloses a slag discharge system for a shield machine, which includes a screw conveyor, which is provided with a middle slag discharge port and a tail slag discharge port. The two slag discharge ports are correspondingly provided with a filter gate and a double gate. The lower end of the filter gate is connected to a crusher, and a blanking box is installed at the lower end of the crusher. The discharge port of the blanking box is connected to the slurry discharge pipeline. In the earth pressure mode, the filter gate in the middle of the screw conveyor is closed, and the double gate at the tail is opened. The slag enters the screw conveyor and is discharged from the tail slag discharge port into the belt conveyor and then discharged out of the tunnel. In the mud and water mode, the filter gate in the middle of the screw conveyor is opened and the double gates at the tail are closed. After the slag enters the screw conveyor, it falls into the crusher through the middle slag outlet. The crushed slag enters the material box and is discharged from the slurry discharge pipeline by a slurry pump and transported out of the tunnel.

[0004] The above-mentioned slag discharge system can realize the rapid switching between the earth pressure mode and the mud water mode by controlling the opening and closing of the corresponding gates. However, the above-mentioned slag discharge system only adopts one screw conveyor (i.e., a screw machine). A filter gate needs to be installed at the middle slag discharge port of the screw machine. A crusher and a drop box (the two together constitute a crushing device) are installed below the filter gate. During actual installation, the crushing device has a certain volume and requires a certain layout space. The middle slag discharge port is relatively forward, and a larger layout space can only be freed up by increasing the inclination of the screw machine. However, this will cause the tail end of the screw machine to be too high, which is not conducive to the layout of the screw machine and the belt conveyor. In addition, excessive inclination is not conducive to the transportation of slag, which brings difficulties to the layout and installation. Utility Model Content

[0005] The purpose of the utility model is to provide a shield machine slag discharge system to solve the problem that the existing slag discharge system only uses one screw machine and the crushing device is connected to the middle of the screw machine, which makes the layout and installation difficult; the purpose of the utility model is also to provide a shield machine to solve the above problem.

[0006] In order to achieve the above purpose, the shield machine slag discharging system in the utility model adopts the following technical solutions:

[0007] A shield machine slag discharge system comprises a primary screw machine and a secondary screw machine located at the rear side of the primary screw machine, the inclination degree of the primary screw machine is greater than that of the secondary screw machine, a first gate is arranged at the lower side of the tail of the primary screw machine, a crushing device is connected below the first gate, a second gate is arranged at the lower side of the tail of the secondary screw machine, a slag transportation device is arranged below the second gate, the rear end of the primary screw machine is connected to the front end of the secondary screw machine through a third gate, and the third gate is located at the rear side of the first gate.

[0008] The beneficial effect of the above technical scheme is that the utility model provides a pioneering shield machine slag discharge system, which includes two screw machines, namely a first-level screw machine and a second-level screw machine located at the rear side of the first-level screw machine. A first gate is arranged on the lower side of the tail of the first-level screw machine, and a crushing device is connected below the first gate. The crushing device can realize a muddy water mode shield by connecting a slurry discharge device or being used in conjunction with a slag transportation device, and the crushing device is connected to the tail of the first-level screw machine. Since the first-level screw machine is arranged at an angle, the further back the arrangement space is, the larger the arrangement space is, which facilitates the arrangement and installation of the crushing device, and there is no need to tilt the first-level screw machine too much, which facilitates the arrangement of the first-level screw machine and the transportation of slag.

[0009] At the same time, a second gate is provided at the lower side of the tail of the second-stage screw machine, a slag transportation device is provided below the second gate, and the inclination of the first-stage screw machine is greater than that of the second-stage screw machine, which facilitates the arrangement of the second-stage screw machine and facilitates the slag to be discharged through the slag transportation device. In addition, the rear end of the first-stage screw machine is connected to the front end of the second-stage screw machine through the third gate, and the third gate is located at the rear side of the first gate, so that when the third gate and the second gate are opened and the first gate is closed, the earth pressure mode shield can be realized, so that the slag passes through the two-stage screw machine and then through the slag transportation device for slag discharge; when the third gate and the second gate are closed and the first gate is opened, the slag is discharged into the crushing device through the first gate, and the crushed slag is transported to the outside of the tunnel through the slurry discharge device, realizing the mud-water mode shield, which also ensures the switching use of the two modes.

[0010] Furthermore, the two-stage screw machine is arranged horizontally.

[0011] Furthermore, the crushing device comprises a dilution box and a crusher installed in the dilution box, the dilution box has a feed port connected to the first gate, and a dilution cavity is formed in the dilution box between the inlet of the crusher and the feed port.

[0012] Furthermore, the crushing device is connected to a slurry discharge device, and the slurry discharge device includes a slurry discharge pump connected to the discharge port of the crushing device and a slurry discharge pipeline connected to the outlet of the slurry discharge pump.

[0013] Furthermore, the discharge port of the crushing device is located directly below the front end of the secondary screw machine.

[0014] In order to achieve the above purpose, the shield machine in the utility model adopts the following technical solutions:

[0015] A shield machine comprises a main machine and a slag discharge system, wherein the slag discharge system comprises a primary screw machine and a secondary screw machine located at the rear side of the primary screw machine, the inclination degree of the primary screw machine is greater than that of the secondary screw machine, a first gate is arranged at the lower side of the tail of the primary screw machine, a crushing device is connected below the first gate, a second gate is arranged at the lower side of the tail of the secondary screw machine, a slag transportation device is arranged below the second gate, the rear end of the primary screw machine is connected to the front end of the secondary screw machine through a third gate, and the third gate is located at the rear side of the first gate.

[0016] The beneficial effect of the above technical scheme is that the utility model provides an improved shield machine, the improvement is that the slag discharge system of the shield machine includes two screw machines, namely a first-level screw machine and a second-level screw machine located at the rear side of the first-level screw machine. A first gate is arranged on the lower side of the tail of the first-level screw machine, and a crushing device is connected below the first gate. The crushing device can realize a muddy water mode shield by connecting a slurry discharge device or being used in conjunction with a slag transportation device, and the crushing device is connected to the tail of the first-level screw machine. Since the first-level screw machine is arranged at an angle, the further back the arrangement space is, the more convenient it is to arrange the crushing device, and there is no need to tilt the first-level screw machine too much, which facilitates the arrangement of the first-level screw machine and the transportation of slag.

[0017] At the same time, a second gate is provided at the lower side of the tail of the second-stage screw machine, a slag transportation device is provided below the second gate, and the inclination of the first-stage screw machine is greater than that of the second-stage screw machine, which facilitates the arrangement of the second-stage screw machine and facilitates the slag to be discharged through the slag transportation device. In addition, the rear end of the first-stage screw machine is connected to the front end of the second-stage screw machine through the third gate, and the third gate is located at the rear side of the first gate, so that when the third gate and the second gate are opened and the first gate is closed, the earth pressure mode shield can be realized, so that the slag passes through the two-stage screw machine and then through the slag transportation device for slag discharge; when the third gate and the second gate are closed and the first gate is opened, the slag is discharged into the crushing device through the first gate, and the crushed slag is transported to the outside of the tunnel through the slurry discharge device, realizing the mud-water mode shield, which also ensures the switching use of the two modes.

[0018] Furthermore, the two-stage screw machine is arranged horizontally.

[0019] Furthermore, the crushing device comprises a dilution box and a crusher installed in the dilution box, the dilution box has a feed port connected to the first gate, and a dilution cavity is formed in the dilution box between the inlet of the crusher and the feed port.

[0020] Furthermore, the crushing device is connected to a slurry discharge device, and the slurry discharge device includes a slurry discharge pump connected to the discharge port of the crushing device and a slurry discharge pipeline connected to the outlet of the slurry discharge pump.

[0021] Furthermore, the discharge port of the crushing device is located directly below the front end of the secondary screw machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the shield machine in the utility model.

[0023] In the figure: 1. Main machine; 2. First-stage screw machine; 3. Third gate; 4. Second-stage screw machine; 5. Second gate; 6. Belt conveyor; 7. Dilution box; 8. Crusher; 9. Discharge port; 10. First gate; 11. Slurry discharge pump; 12. Slurry discharge pipeline. DETAILED DESCRIPTION

[0024] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0025] The slag discharge system of the shield machine in the utility model includes two screw machines, namely a first-level screw machine and a second-level screw machine located at the rear side of the first-level screw machine. The crushing device is connected to the tail of the first-level screw machine. Since the first-level screw machine is arranged at an angle, the further back it is arranged, the larger the space is, thus facilitating the arrangement and installation of the crushing device, and also facilitating the arrangement of the two screw machines and the transportation of slag.

[0026] Embodiment of shield machine in the utility model:

[0027] like Figure 1 As shown, the shield machine includes a main machine 1 and a slag discharge system. The main machine 1 is an important structure for excavation and is responsible for excavation and maintaining the stability of the excavation surface. The slag discharge system is used to switch between the two shield modes of earth pressure mode and mud water mode and discharge slag in each mode. Of course, the shield machine also includes necessary fluid systems, hydraulic systems, electrical systems, etc. (not shown in the figure).

[0028] In the present invention, the slag discharging system includes two screw machines, namely, a primary screw machine 2 and a secondary screw machine 4 located at the rear side of the primary screw machine 2. The primary screw machine 2 is arranged at an angle and the degree of inclination is greater than that of the secondary screw machine 4. Specifically, in the present embodiment, the secondary screw machine 4 is arranged horizontally, that is, the degree of inclination is zero, so that it can be arranged conveniently without occupying too much height space. Of course, in other embodiments, the secondary screw machine 4 can also be arranged at an angle, but the degree of inclination is relatively small.

[0029] A first gate 10 is provided at the lower side of the tail of the first-stage screw machine 2, and a crushing device is connected below the first gate 10, and the crushing device is connected to a slurry discharge device. In this embodiment, the crushing device includes a dilution box 7 and a crusher 8 installed in the dilution box 7, that is, the inlet and outlet of the crusher 8 are both located in the dilution box 7. The dilution box 7 has a feed port connected to the first gate 10, and a dilution chamber is formed in the dilution box 7 between the inlet of the crusher 8 and the above-mentioned feed port. Of course, the dilution chamber is connected to a water inlet pipe (not shown in the figure), so that the slag can be diluted first by external water, and then crushed, so as to avoid the slag being too sticky during the first crushing and adhering to the crusher cutter, thereby affecting the performance of the crusher. Therefore, the mud directly formed by the first dilution can flush the crusher, and it is also convenient for the mud to be transported to the outside of the tunnel through the subsequent slurry discharge device.

[0030] The slurry discharge device includes a slurry discharge pump 11 connected to the discharge port 9 of the crushing device and a slurry discharge pipeline 12 connected to the outlet of the slurry discharge pump 11. The slurry discharge pump 11 is relatively forward, which is conducive to the discharge of crushed slag mixed in the mud. Figure 1 As shown, the discharge port 9 of the crushing device is located directly below the front end of the secondary screw machine 4, that is, the entire crushing device is relatively far back. Since the primary screw machine 2 is arranged at an angle, the further back it is arranged, the larger the space is, which facilitates the arrangement and installation of the crushing device. There is no need to tilt the primary screw machine 2 too much, which facilitates the arrangement of the primary screw machine 2 and the transportation of slag.

[0031] A second gate 5 is provided at the lower side of the tail of the secondary screw machine 4, and a slag transportation device is provided below the second gate 5. The slag transportation device in this embodiment is a belt conveyor 6, which facilitates the slag to be discharged through the belt conveyor 6. The rear end of the primary screw machine 2 is connected to the front end of the secondary screw machine 4 through the third gate 3, and the third gate 3 is located at the rear side of the first gate 10. When the third gate 3 is opened, the primary screw machine 2 and the secondary screw machine 4 are connected, and the slag transported backward by the primary screw machine 2 can enter the secondary screw machine 4 and continue to be transported backward.

[0032] The slag discharge system in the utility model has both earth pressure mode and mud water mode, and can switch between the two modes as needed. When the stratum water pressure is low or the stratum contains more broken rock and sticky blocks, the earth pressure shield slag discharge mode is adopted. In this mode, the first gate 10 is closed, the third gate 3 and the second gate 5 are opened, the main machine 1, the first screw machine 2, the second screw machine 4, and the belt conveyor 6 are running, and the dilution box 7, the crusher 8, and the slurry pump 11 stop working. The specific process is: the main machine 1 excavates, the slag is transported to the second screw machine 4 through the first screw machine 2, and finally falls on the belt conveyor 6 through the second gate 5, and then transported to the outside of the tunnel by a train or a continuous belt conveyor.

[0033] When the formation water pressure is high, the slurry shield discharge mode is adopted. In this mode, the first gate 10 is opened, the third gate 3 and the second gate 5 are closed, the secondary screw machine 4 and the belt conveyor 6 stop working, and the main machine 1, the primary screw machine 2, the dilution box 7, the crusher 8, and the slurry pump 11 are in operation. The specific process is as follows: the main machine 1 is excavated, the slag enters the primary screw machine 2 and enters the dilution box 7 through the first gate 10, and after being flushed and processed by the crusher 8 in the dilution box 7, it enters the slurry pump 11 through the discharge port 9, and is discharged to the slurry discharge pipeline 12 through the outlet of the slurry pump 11, and finally discharged to the train or continuous belt conveyor and transported outside the tunnel.

[0034] Among them, the slurry shield mode does not require the addition of a circulation system and a slurry separation station, and has a lower cost. Moreover, the switch between the two modes only requires one-button operation in the main control room to control the opening or closing of the corresponding gates and the operation or stopping of the corresponding equipment. There is no need to stop the machine, and the mode switch can be completed quickly, reducing the mold change time.

[0035] In other embodiments of the shield machine: the crushing device can also be the same as the prior art, including a crusher and a material box, the inlet of the crusher is connected to the first gate, the outlet of the crusher is connected to the inlet of the material box, and the outlet of the material box is connected to the slurry discharge device.

[0036] In other embodiments of the shield machine: the slurry discharge device may also include a slurry discharge pipeline connected to the discharge port of the crushing device, and the slurry discharge pump is arranged on the slurry discharge pipeline and has a certain distance from the discharge port of the crushing device.

[0037] In other embodiments of the shield machine: the discharge port of the crushing device can also be located at the front side below the front end of the secondary screw machine. At this time, since the crushing device is still connected to the tail of the primary screw machine, a larger layout space can still be obtained compared to the prior art, thereby facilitating the layout and installation of the crushing device.

[0038] In other embodiments of the shield machine: the slag transportation device arranged under the second gate can also be a slag truck. Of course, the slurry discharge device connected downstream of the crushing device may not be a slurry discharge device in the form of a slurry discharge pump and a slurry discharge pipeline, but may cooperate with a slag truck to receive the mud and transport it out of the hole.

[0039] The embodiment of the slag discharge system of the shield machine in the present utility model is as follows: the specific structure of the slag discharge system of the shield machine is the same as the slag discharge system in the above-mentioned shield machine embodiment, and will not be repeated here.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield machine slag discharge system, characterized in that: It includes a first-stage screw machine and a second-stage screw machine located at the rear side of the first-stage screw machine. The inclination degree of the first-stage screw machine is greater than that of the second-stage screw machine. A first gate is arranged at the lower side of the tail of the first-stage screw machine, and a crushing device is connected below the first gate. A second gate is arranged at the lower side of the tail of the second-stage screw machine, and a slag transportation device is arranged below the second gate. The rear end of the first-stage screw machine is connected to the front end of the second-stage screw machine through a third gate, and the third gate is located at the rear side of the first gate.

2. The shield machine slag discharge system according to claim 1, characterized in that: The two-stage screw conveyor is arranged horizontally.

3. The shield machine slag discharge system according to claim 1 or 2, characterized in that: The crushing device comprises a dilution box and a crusher installed in the dilution box. The dilution box has a feed port connected to a first gate. A dilution cavity is formed in the dilution box between an inlet of the crusher and the feed port.

4. The shield machine slag discharge system according to claim 1 or 2, characterized in that: The crushing device is connected to a slurry discharge device, which includes a slurry discharge pump connected to the discharge port of the crushing device and a slurry discharge pipeline connected to the outlet of the slurry discharge pump.

5. The shield machine slag discharge system according to claim 1 or 2, characterized in that: The discharge port of the crushing device is located just below the front end of the secondary screw conveyor.

6. A shield machine, comprising a main machine and a slag discharge system, characterized in that: The slag discharge system includes a first-level screw machine and a second-level screw machine located at the rear side of the first-level screw machine. The inclination degree of the first-level screw machine is greater than that of the second-level screw machine. A first gate is arranged at the lower side of the tail of the first-level screw machine, and a crushing device is connected below the first gate. A second gate is arranged at the lower side of the tail of the second-level screw machine, and a slag transportation device is arranged below the second gate. The rear end of the first-level screw machine is connected to the front end of the second-level screw machine through a third gate, and the third gate is located at the rear side of the first gate.

7. The shield machine according to claim 6, characterized in that: The two-stage screw conveyor is arranged horizontally.

8. The shield machine according to claim 6 or 7, characterized in that: The crushing device comprises a dilution box and a crusher installed in the dilution box. The dilution box has a feed port connected to a first gate. A dilution cavity is formed in the dilution box between an inlet of the crusher and the feed port.

9. The shield machine according to claim 6 or 7, characterized in that: The crushing device is connected to a slurry discharge device, which includes a slurry discharge pump connected to the discharge port of the crushing device and a slurry discharge pipeline connected to the outlet of the slurry discharge pump.

10. The shield machine according to claim 6 or 7, characterized in that: The discharge port of the crushing device is located just below the front end of the secondary screw conveyor.

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