Slurry discharging mechanism of shield tunneling machine

Abstract

The utility model relates to the technical field of shield tunneling machines, and discloses a shield tunneling machine slurry discharging mechanism which comprises a machine shell, a conveying pipe fixedly communicates with the interior of the machine shell, rotating rods are rotationally connected to the two ends of the conveying pipe correspondingly, and conveying augers are fixedly connected to the outer surfaces of the two rotating rods correspondingly; the outer surfaces of the two conveying augers are fixedly connected with sealing strips, and the two sealing strips make contact with the inner wall of the conveying pipe. According to the slurry discharging mechanism of the shield tunneling machine, stone blocks and slurry can be stably conveyed by installing the conveying auger, the slurry and the stone blocks are screened through cooperation of a filter screen so that the slurry and the stone blocks can be separated, meanwhile, the right auger can clean the filter screen in the stone block conveying process, and the filter screen is prevented from being blocked; and by installing a sealing strip, blocking between the stone and the conveying auger can be avoided, and meanwhile the sealing performance between the conveying auger and the conveying pipe can be improved.

Description

Technical Field

[0001] This application relates to the field of tunnel boring machine technology, specifically to a tunnel boring machine slurry discharge mechanism. Background Technology

[0002] A tunnel boring machine (TBM) is a type of tunnel boring machine that uses the shield tunneling method. The shield tunneling method involves the tunnel boring machine constructing (laying) the "shield" (referring to supporting segments) of the tunnel while excavating. This is different from the open tunneling method. Internationally, TBMs can also be used in rock formations in a broad sense, but they are different from open (non-shield tunnel boring machines). In my country, however, tunnel boring machines used in soft soil formations are conventionally called (narrowly defined) shield tunneling machines, while those used in rock formations are called (narrowly defined) TBMs.

[0003] An existing patent (publication number: CN222253968U) discloses a slurry discharge mechanism for a tunnel boring machine (TBM), comprising a TBM body and a slurry discharge mechanism. The slurry discharge mechanism includes a slurry tank pipe, an air cushion tank pipe, a shell, a three-way ball, a rotating unit, a slurry discharge pipe, a filter screen, and a slurry pump. The TBM body has a slurry tank and an air cushion tank. The three-way ball has three through holes. When the TBM is in soft soil without rock, both the slurry tank pipe and the air cushion tank pipe are open to discharge slurry, improving slurry discharge efficiency. When it is in rocky strata, the rotating unit is activated, driving the three-way ball to rotate, thereby closing the slurry tank pipe and discharging slurry only through the air cushion tank pipe. At the same time, the filter screen filters out rocks to avoid wear on the slurry pump. The slurry passes through the through holes of the three-way ball and the slurry discharge pipe to reach the slurry pump. This can meet the slurry discharge needs of the TBM under different construction strata conditions and adjust the slurry discharge position according to environmental changes.

[0004] During the use of the above-mentioned document, stones are filtered using a filter screen. However, the filtered stones remain in the air cushion chamber and are not easy to discharge. At the same time, during the operation of the above-mentioned document, the filter screen is easily clogged by the accumulation of fine gravel, which affects the efficiency of mortar discharge. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a slurry discharge mechanism for tunnel boring machines, which has advantages such as improved practicality and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a shield tunneling machine slurry discharge mechanism, comprising a casing, a conveying pipe fixedly connected inside the casing, rotating rods rotatably connected to both ends of the conveying pipe, conveying augers fixedly connected to the outer surfaces of the two rotating rods, sealing strips fixedly connected to the outer surfaces of the two conveying augers, both sealing strips contacting the inner wall of the conveying pipe, a plurality of circumferentially distributed screen holes opened on the upper surface of the right conveying auger, a filter screen installed on the outer surface of the conveying pipe, the sealing strip on the right contacting the filter screen, and a discharge frame fixedly connected to the outer surface of the conveying pipe.

[0007] The above solution, by installing sealing strips, can prevent stones from getting stuck between the conveying auger and the conveying pipe, and at the same time improve the sealing between the conveying auger and the conveying pipe.

[0008] The conveying auger on the right side has a screen hole only above the top of the filter screen. The screen hole allows the mud on the right auger to flow back to the filter screen, preventing the stones from being conveyed too quickly and affecting the discharge of mud and sand. This allows the mud and sand to enter the discharge frame through the filter screen.

[0009] An extraction pump is installed on the inner wall of the casing. The input end of the extraction pump is fixedly connected to the discharge frame through a pipe, and the output end of the extraction pump is fixedly connected to a discharge pipe. The extraction pump can extract the mud and sand in the discharge frame and transport the mud and sand out through the discharge pipe, thus preventing the mud and sand from being retained in the discharge frame.

[0010] A servo motor is installed on the inner wall of the housing. The output end of the servo motor is fixedly connected to the upper end of the rotating rod on the right side. The servo motor can drive the rotating rod on the right side to rotate, so that the rotating rod can drive the conveying auger on the right side to convey the stones and discharge the stones. With the help of the filter screen, the mud and sand can enter the discharge frame.

[0011] The inner wall of the casing is equipped with a conveying mechanism, which is located below the right side of the conveying pipe. The installation of the conveying mechanism facilitates the removal of the discharged stones from the casing, making it easier to process the stones uniformly.

[0012] A drill bit is rotatably connected to the left end of the casing. A cavity is provided between the drill bit and the casing. The cavity facilitates the initial storage of mud and sand. Since the left end of the conveying pipe is located at the bottom of the casing, the mud can be carried into the conveying pipe with the cooperation of the left-side conveying auger.

[0013] A swing slider is fixedly connected to the right side of the drill bit. Installing the swing slider makes it easier to push the stone in the cavity up, so that the stone can enter the conveying pipe with the help of the conveying auger.

[0014] The two rotating rods are connected at their close ends by a universal joint. The universal joint connection allows the two rotating rods to move relative to each other even when their axes are not on the same straight line or there is an angle between them. The universal joint also ensures the power transmission between them, thereby enabling stable transportation of the stones.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] This shield tunneling machine slurry discharge mechanism can stably transport rocks and slurry by installing a conveying auger. The slurry and rocks are screened by a filter screen to separate them. At the same time, the right-side auger can clean the filter screen during the transport of rocks to prevent the filter screen from getting clogged, thereby improving the discharge efficiency of slurry. The installation of a sealing strip can prevent rocks from getting stuck between them and the conveying auger, and can also improve the sealing between the conveying auger and the conveying pipe. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this application;

[0018] Figure 2 This is a schematic diagram of the conveying auger structure for this application;

[0019] Figure 3 This is a cross-sectional view of the conveying pipe structure of this application;

[0020] Figure 4 This is a schematic diagram of the overall structure of this application.

[0021] In the picture:

[0022] 1. Casing; 2. Conveying pipe; 3. Rotating rod; 4. Conveying auger; 5. Sealing strip; 6. Screen hole; 7. Filter screen; 8. Discharge frame; 9. Extraction pump; 10. Discharge pipe; 11. Servo motor; 12. Conveying mechanism; 13. Drill bit; 14. Cavity; 15. Swinging slider. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Please see Figure 1 , Figure 2 and Figure 3This embodiment of a tunnel boring machine slurry discharge mechanism includes a housing 1. A conveying pipe 2 is fixedly connected inside the housing 1. Rotating rods 3 are rotatably connected to both ends of the conveying pipe 2. Conveying augers 4 are fixedly connected to the outer surfaces of both rotating rods 3. Sealing strips 5 are fixedly connected to the outer surfaces of both conveying augers 4, and both sealing strips 5 are in contact with the inner wall of the conveying pipe 2. Multiple circumferentially distributed screen holes 6 are opened on the upper surface of the right-side conveying auger 4. A filter screen 7 is installed on the outer surface of the conveying pipe 2. The sealing strip 5 on the right side is connected to the filter screen 7. The outer surface of the conveying pipe 2 is fixedly connected to a discharge frame 8. By installing a conveying auger 4, stable conveying of stones and slurry can be achieved. The slurry and stones are screened by the filter screen 7 to separate them. At the same time, the right auger can clean the filter screen 7 during the conveying of stones to prevent the filter screen 7 from becoming clogged, thereby improving the discharge efficiency of slurry. By installing a sealing strip 5, it is possible to prevent stones from getting stuck between them and the conveying auger 4, and at the same time, it can improve the sealing between the conveying auger 4 and the conveying pipe 2.

[0025] Please see Figure 1 , Figure 2 and Figure 4 The right-side conveying auger 4 has a screen hole 6 at its upper end, which is only higher than the filter screen 7. The screen hole 6 allows the mud on the right-side auger to flow back to the position of the filter screen 7, preventing the stones from being conveyed too quickly and affecting the discharge of mud and sand. This allows the mud and sand to enter the discharge frame 8 through the filter screen 7. The inner wall of the casing 1 is equipped with a suction pump 9. The input end of the suction pump 9 is fixedly connected to the discharge frame 8 through a pipe, and the output end of the suction pump 9 is fixedly connected to the discharge pipe 10. The suction pump 9 can extract the mud and sand in the discharge frame 8 and transport the mud and sand out through the discharge pipe 10, preventing the mud and sand from accumulating in the discharge frame 8. The inner wall of the casing 1 is equipped with a servo motor 11. The output end of the servo motor 11 is fixedly connected to the upper end of the right-side rotating rod 3. The servo motor 11 can drive the right-side rotating rod 3 to rotate, so that the rotating rod 3 can drive the right-side conveying auger 4 to convey the stones and discharge the stones. With the cooperation of the filter screen 7, the mud and sand can enter the discharge frame 8.

[0026] Please see Figure 1 , Figure 2 and Figure 3A conveying mechanism 12 is installed on the inner wall of the casing 1. The conveying mechanism 12 is located below the right side of the conveying pipe 2. The installation of the conveying mechanism 12 facilitates the removal of discharged stones from the casing 1, making it easier to process the stones uniformly. A drill bit 13 is rotatably connected to the left end of the casing 1. A cavity 14 is provided between the drill bit 13 and the casing 1. The cavity 14 facilitates the initial storage of mud and sand. Since the left end of the conveying pipe 2 is located at the bottom end of the casing 1, the mud can be carried into the conveying pipe 2 with the cooperation of the left-side conveying auger 4. A swing slider 15 is fixedly connected to the right side of 3. The installation of the swing slider 15 can facilitate the pushing of the stone in the cavity 14, so that the stone can enter the conveying pipe 2 with the cooperation of the conveying auger 4. The two rotating rods 3 are connected by a universal joint at their close ends. The universal joint connection allows the two rotating rods 3 to move relative to each other when they are on different axes, so that the axes of the two rotating rods 3 are not on the same straight line, or there is an angle between them. The universal joint can also ensure the power transmission between them, so that the stone can be conveyed stably.

[0027] In this embodiment, a tunnel boring machine slurry discharge mechanism can stably transport rocks and slurry by installing a conveying auger 4. The slurry and rocks are screened by a filter screen 7 to separate them. At the same time, the right-side auger can clean the filter screen 7 during the transport of rocks to prevent the filter screen 7 from becoming clogged, thereby improving the discharge efficiency of slurry. The installation of a sealing strip 5 can prevent rocks from getting stuck between them and the conveying auger 4, and at the same time improve the sealing between the conveying auger 4 and the conveying pipe 2.

[0028] The working principle of the above embodiment is as follows: First, after the drill bit 13 crushes the underground rocks, it will be discharged into the cavity 14. During the rotation of the drill bit 13, it can drive the swing slider 15 to swing in the cavity 14, so that the swing slider 15 can push the rocks in the cavity 14. At this time, the servo motor 11 starts and drives the right rotating rod 3 to rotate, so that the right rotating rod 3 can drive the left rotating rod 3 to rotate through the universal joint. During the rotation of the two rotating rods 3, they can drive the conveying auger 4 to convey the rocks and mud. When the mud and rocks are conveyed upward at an incline, the mud can flow downward through the screen hole 6, so that the mud can pass through the filter screen. 7. The stones enter the discharge frame 8 and are conveyed by the conveying auger 4 to the conveying mechanism 12, and then conveyed to the outside. At this time, the extraction pump 9 extracts the mud in the discharge frame 8 through the pipeline and discharges the mud through the discharge pipe 10. During this process, the mud and stones can be screened to separate them. At the same time, the right conveying auger 4 can clean the filter screen 7 during the stone conveying process to prevent the filter screen 7 from becoming blocked, thereby improving the discharge efficiency of the mud. By installing the sealing strip 5, it is possible to prevent the stones from getting stuck between the stone and the conveying auger 4, and at the same time, it can improve the sealing between the conveying auger 4 and the conveying pipe 2.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slurry discharge mechanism for a tunnel boring machine, comprising a casing (1), characterized in that: The inside of the housing (1) is fixedly connected to a conveying pipe (2). Both ends of the conveying pipe (2) are rotatably connected to rotating rods (3). The outer surfaces of the two rotating rods (3) are fixedly connected to conveying augers (4). The outer surfaces of the two conveying augers (4) are fixedly connected to sealing strips (5). The two sealing strips (5) are in contact with the inner wall of the conveying pipe (2). The upper surface of the right conveying auger (4) is provided with multiple circumferentially distributed screen holes (6). The outer surface of the conveying pipe (2) is equipped with a filter screen (7). The sealing strip (5) on the right side is in contact with the filter screen (7). The outer surface of the conveying pipe (2) is fixedly connected to a discharge frame (8).

2. The grout discharge mechanism for a tunnel boring machine according to claim 1, characterized in that: The conveying auger (4) on the right side has a sieve hole (6) only above the upper end of the filter screen (7).

3. The grout discharge mechanism for a tunnel boring machine according to claim 1, characterized in that: The inner wall of the housing (1) is equipped with a pump (9). The input end of the pump (9) is fixedly connected to the discharge frame (8) through a pipe, and the output end of the pump (9) is fixedly connected to a discharge pipe (10).

4. The grout discharge mechanism for a tunnel boring machine according to claim 1, characterized in that: A servo motor (11) is installed on the inner wall of the housing (1), and the output end of the servo motor (11) is fixedly connected to the upper end of the rotating rod (3) on the right side.

5. A shield tunneling machine grout discharge mechanism according to claim 1, characterized in that: The inner wall of the housing (1) is equipped with a conveying mechanism (12), which is located below the right side of the conveying pipe (2).

6. A shield tunneling machine grout discharge mechanism according to claim 1, characterized in that: A drill bit (13) is rotatably connected to the left end of the housing (1), and a cavity (14) is provided between the drill bit (13) and the housing (1).

7. A shield tunneling machine grout discharge mechanism according to claim 6, characterized in that: A swing slider (15) is fixedly connected to the right side of the drill bit (13).

8. A grout discharge mechanism for a tunnel boring machine according to claim 1, characterized in that: The two rotating rods (3) are connected at their close ends by a universal joint.

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