Pulping and storing device for TBM (Tunnel Boring Machine)

Abstract

The invention relates to the technical field of tunnel engineering equipment, and discloses a slurry preparation and storage device for a TBM (Tunnel Boring Machine), which comprises a tank body and an inner tank, the top and the bottom of the tank body are respectively provided with a feed port A and a discharge port, the inner tank is arranged in the tank body, the top of the inner tank is provided with a feed port B, and a gap cavity is formed between the outer surface of the inner tank and the inner surface of the tank body; the bottom of the interior of the gap cavity communicates with the discharging port and is rotationally connected with a connecting pipe, a plurality of auxiliary frames matched with the gap cavity are arranged on the surface of the connecting pipe, a plurality of discharging holes are formed in the surfaces of the auxiliary frames, the connecting pipe communicates with the interior of the inner tank, and a feeding assembly is arranged in the inner tank; after the feeding assembly feeds the slurry in the inner tank into the connecting pipe, the slurry is discharged into the gap cavity through the plurality of discharging holes in the surface of the auxiliary frame, and the slurry and the slurry in the gap cavity are subjected to double-liquid mixing. The double-liquid mixing device has the effect of improving the double-liquid mixing uniformity.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering equipment, and more particularly to a slurry making and storing device for a TBM. Background Art

[0002] At present, the TBM shield grouting system usually consists of a slurry preparation and storage system, a pumping system, and a grouting pipeline. Among them, the grouting storage system, as a more important component, is responsible for the production, mixing and storage of slurry. The quality of its preparation and storage is directly related to the filling of the bedrock of the stratum and the stability of the bedrock of the tunnel.

[0003] Existing grouting slurries are usually cement mixed slurry, water glass slurry, etc., which can be grouted with a single liquid or grouted with two liquids after mixing. The two-liquid grouting has the obvious advantages of fast solidification speed and strong solidification stability. For example, the Chinese patent application with the announcement number CN216756037U discloses a shield tunnel slurry storage tank, comprising: a tank body, the top of the tank body is an open end, a water glass storage tank and a retarder storage tank are provided in the open end, a stirring mechanism is provided in the tank body, the bottoms of the water glass storage tank and the retarder storage tank are both provided with drainage holes, a flow meter switch is provided at the drainage hole, a reflective photoelectric sensor is provided on the tank body, and a slurry discharge port is provided at the bottom of the tank body. By arranging a water glass storage tank and a retarder storage tank on the tank body, when it is necessary to convert a single liquid into a double liquid, water glass and retarder are added to the single liquid, and the slurry volume is obtained in real time by a reflective photoelectric sensor. The addition amount is controlled by a flow meter switch. Under the stirring action of the stirring mechanism, switching between single-liquid and double-liquid grouting can be achieved. This has the advantages of low cost, controllable slurry gel time, functional diversity, and convenient conversion.

[0004] The applicant found that the above-mentioned patent documents have certain defects. Since water glass or other additives are generally added from top to bottom during the two-liquid mixing process, although stirring and mixing are performed, the water glass is added to the original slurry from top to bottom, and the upper and lower liquid layers are not mixed evenly, which is prone to stratification. In addition, the mixing progress of the upper and lower liquids is different, which is prone to produce suspended particles. As a result, additional suspending agents, anticoagulants, etc. are needed to assist in controlling the state of the mixed liquid, which makes the two-liquid mixing preparation process inconvenient. Summary of the Invention

[0005] The present invention discloses a slurry preparation and storage device for TBM, so as to solve the technical problems in the above-mentioned background technology.

[0006] The present invention discloses a pulping and storage device for a TBM, comprising a tank body, wherein a feed port A and a discharge port are respectively provided at the top and bottom of the tank body; and an inner tank disposed inside the tank body, wherein a feed port B is provided at the top of the inner tank, a gap cavity is formed between the outer surface of the inner tank and the inner surface of the tank body, the bottom of the gap cavity is connected to the discharge port and is rotatably connected to a connecting pipe, a surface of the connecting pipe is provided with a plurality of auxiliary frames adapted to the gap cavity, a surface of the auxiliary frames is provided with a plurality of discharge holes, the connecting pipe is connected to the interior of the inner tank, and a feeding assembly is provided inside the inner tank;

[0007] After the feeding component feeds the slurry in the inner tank into the connecting pipe, the slurry is discharged into the gap cavity through a plurality of discharge holes on the surface of the auxiliary frame, and mixed with the slurry in the gap cavity;

[0008] Also included is a drive assembly for causing the auxiliary rack to agitate within the interstitial cavity.

[0009] Preferably, the feeding assembly includes a rotating shaft passing through the interior of the inner tank, the bottom of the rotating shaft is fixedly connected to the connecting pipe, and a piston slides inside the rotating shaft, a one-way assembly is provided on the surface of the rotating shaft, a cylinder is fixedly connected to the top of the inner tank, the output end of the cylinder extends into the interior of the rotating shaft, and is connected to the piston through a connecting rod.

[0010] Preferably, the one-way component includes a one-way plate, the surface of the rotating shaft is provided with a liquid hole adapted to the one-way plate, the one-way plate is connected to the rotating shaft via a movable shaft, and the one-way plate can only rotate toward the inside of the rotating shaft.

[0011] Preferably, the driving assembly includes a driving motor fixedly connected to the top of the inner tank, and the output end of the driving motor is connected to the rotating shaft through a synchronous belt.

[0012] Preferably, a plurality of stirring blades 211 are fixedly connected to the surface of the rotating shaft 21 .

[0013] Preferably, a blocking assembly is further included, which is arranged inside the connecting pipe. The blocking assembly includes a blocking block sliding inside the connecting pipe. The blocking block is connected to the connecting pipe through a tension spring. Under normal conditions, the blocking block is located below the connection position between the connecting pipe and the auxiliary frame.

[0014] Preferably, a plurality of sliding blocks are slidably arranged on the surface of the auxiliary frame, and cutting leaves are provided on both sides of the sliding blocks, and the cutting leaves on both sides of the sliding blocks are staggered with each other.

[0015] Preferably, a plurality of the sliding blocks are connected via a connecting belt, a limiting block is fixedly connected to the surface of the connecting belt, and a limiting groove adapted to the limiting block is provided on the inner wall of the tank body.

[0016] Preferably, the connecting belt is a stainless steel belt.

[0017] Preferably, a spiral blade is fixedly connected to the bottom of the connecting pipe, and the spiral blade is inserted into the discharge port.

[0018] Preferably, a feeding pipe is fixedly connected to the bottom of the discharge port.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides an inner tank to form a gap cavity inside the tank body, which significantly reduces the mixing space during the two-liquid stirring process, shortens the liquid circulation path when the two liquids are mixed, and the eddy current or turbulence generated when the auxiliary frame drives the cutting blades to stir covers the entire tank body more quickly, reducing the influence of the two-liquid mixing stratification and the stirring blind area, and the shear force generated by the cutting blades can be more evenly distributed in the gap cavity, effectively improving the mixing efficiency.

[0021] The present invention arranges an inner tank inside the tank body to store the two liquids separately, thereby reducing the area occupied by the two-liquid mixing equipment and improving space utilization. The piston moves up and down intermittently to quantitatively and evenly deliver the slurry in the inner tank into the connecting pipe and discharge it through the discharge hole on the surface of the auxiliary frame, effectively improving the mixing accuracy and the efficiency of the two-liquid preparation.

[0022] The present invention provides a discharge port, so that the two liquids are mixed in time when needed and discharged through the discharge port, and are prepared immediately when needed. When not needed, the two different slurries are stored in the inner tank and the gap cavity respectively, thereby improving utilization and storage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention for showing the internal structure of the tank;

[0025] Figure 3 It is a cross-sectional view of the present invention for showing the interior of the tank body and the interior of the inner tank;

[0026] Figure 4 This is a cross-sectional view of the present invention for showing the internal structure of the rotating shaft and its surrounding structures;

[0027] Figure 5 This invention Figure 4 A magnified view of point A in the figure;

[0028] Figure 6 It is a schematic diagram of the present invention for showing the surface structure of the auxiliary frame;

[0029] Figure 7 It is a schematic diagram of the present invention for showing the connecting belt and its surrounding structures.

[0030] In the figure: 1. Tank body; 11. Support legs; 12. Feed port A; 13. Discharge port; 14. Feed pipe; 2. Inner tank; 21. Rotating shaft; 211. Stirring blade; 22. Connecting pipe; 221. Block; 222. Tension spring; 23. One-way plate; 231. Movable shaft; 24. Driving motor; 241. Synchronous belt; 25. Cylinder; 251. Connecting rod; 252. Piston; 26. Feed port B; 27. Spiral blade; 3. Auxiliary frame; 31. Discharge hole; 32. Slider; 321. Cutting blade; 322. Connecting belt; 323. Limit block; 324. Limit groove; 33. Gap cavity. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. Furthermore, features described in some examples may be combined in other examples.

[0032] The embodiment of the present invention discloses a slurry preparation and storage device for TBM, such as Figure 1-7 As shown, it includes a tank body 1, and a feed port A12 and a discharge port 13 are respectively provided on the top and bottom of the tank body 1. The slurry enters through the feed port A12 and enters the interior of the tank body 1, and is discharged through the discharge port 13. Therefore, a valve can be provided at the discharge port 13, and the discharge and storage of the slurry inside the tank body 1 can be controlled by opening and closing the valve. A plurality of legs 11 are also installed at the bottom of the tank body 1. The number of legs 11 is based on the ability to stably support the tank body 1. Four legs are provided here. It also includes an inner tank 2, which is provided inside the tank body 1. The diameter of the inner tank 2 is smaller than the diameter of the cavity inside the tank body 1. A feed port B26 is provided on the top of the inner tank 2, and the slurry can enter the inner tank 2 from the feed port B26 for storage. A gap cavity 33 is formed between the outer surface of the inner tank 2 and the inner surface of the tank body 1. The bottom of the gap cavity 33 is connected to the discharge port 13 and is rotatably connected to a connecting pipe 22. A plurality of auxiliary frames 3 adapted to the gap cavity 33 are provided on the surface of the connecting pipe 22. The interior of the connecting pipe 22 is connected to the interior of the auxiliary frame 3. A plurality of discharge holes 31 are provided on the surface of the auxiliary frame 3. The connecting pipe 22 is connected to the interior of the inner tank 2, and a feeding assembly is provided inside the inner tank 2.

[0033] Specifically, the gap cavity 33 can be used to hold concrete slurry, aggregates and additives, while the inner tank 2 can be used to hold water glass and additives for slurry used for two-liquid mixing. After the feeding component feeds the slurry in the inner tank 2 into the connecting pipe 22, the slurry enters the auxiliary frame 3 and is discharged into the gap cavity 33 through several discharge holes 31 on the surface of the auxiliary frame 3, and is mixed with the slurry in the gap cavity 33. Since there are multiple discharge holes 31 and they are located at different positions on the surface of the auxiliary frame 3, the water glass slurry can be discharged from different depths of the concrete slurry in the gap cavity 33 and mixed evenly with the concrete slurry, effectively reducing the unevenness, discontinuity and stratification of the mixing from top to bottom, and improving the efficiency of mixing and stirring. It also includes a driving component for stirring the auxiliary frame 3 in the gap cavity 33. Driven by the driving component, the auxiliary frame 3 can rotate with the connecting pipe 22 as the axis and stir the two liquids in the gap cavity 33, thereby improving the mixing effect.

[0034] It is worth noting that since the inner tank 2 compresses the lateral space inside the tank body 1, a surrounding gap cavity 33 is formed inside the tank body 1, and the stirring vortex or turbulence can cover the entire gap cavity 33 more quickly, which has a significant effect on improving the uniformity of the two-liquid mixing. Moreover, since the auxiliary frame 3 is adapted to the shape of the internal space of the gap cavity 33, the existence of dead corners of stirring is further reduced, thereby improving the stirring and mixing effect.

[0035] like Figure 4 As shown, in this embodiment, the feeding assembly includes a rotating shaft 21 that is inserted into the interior of the inner tank 2. The bottom of the rotating shaft 21 is fixedly connected to the connecting pipe 22, and the bottom of the rotating shaft 21 is rotatably connected to the bottom of the inner tank 2 and is sealed and rotatably connected to the bottom of the inner tank 2. A piston 252 slides inside the rotating shaft 21, and the piston 252 is sealed and slidably connected to the interior of the rotating shaft 21. A one-way component is provided on the surface of the rotating shaft 21. The one-way component is used to introduce the slurry in the inner tank 2 into the rotating shaft 21, and further prevent the air, impurities and slurry in the rotating shaft 21 from flowing back into the inner tank 2. A cylinder 25 is fixedly connected to the top of the inner tank 2, and the output end of the cylinder 25 extends into the rotating shaft 21. The connecting rod 251 is connected to the piston 252 through the connecting rod 251. The two ends of the connecting rod 251 are fixedly connected to the output shaft of the cylinder 25 and the piston 252 respectively. The output and contraction of the cylinder 25 pull the connecting rod 251 and the piston 252 to move up and down inside the rotating shaft 21. The upward movement of the piston 252 increases the internal space of the rotating shaft 21, while the corresponding air content remains unchanged, which reduces the air pressure in the rotating shaft 21. Under the action of the external atmospheric pressure, the slurry in the inner tank 2 is pressed into the rotating shaft 21 through the one-way component. Further, when the piston 252 moves downward, it pushes the slurry located in the rotating shaft 21 to move down to the connecting pipe 22 at the bottom, and then is discharged through the discharge hole 31 on the surface of the auxiliary frame 3.

[0036] Furthermore, the one-way component includes a one-way plate 23, and a liquid hole adapted to the one-way plate 23 is opened on the surface of the rotating shaft 21. The one-way plate 23 is connected to the rotating shaft 21 through a movable shaft 231. The movable shaft 231 is fixed on the top of the one-way plate 23, and its two ends are rotatably connected to the inner wall of the rotating shaft 21. The size of the one-way plate 23 is slightly larger than the liquid hole, and the one-way plate 23 is located on the inner wall of the rotating shaft 21. Therefore, the one-way plate 23 can only rotate toward the inside of the rotating shaft 21. When rotating toward the outside of the rotating shaft 21, its body is restricted by the size of the liquid hole and cannot rotate outward, thereby achieving the effect of one-way passage.

[0037] Specifically, through the upward movement of the piston 252, the external atmospheric pressure presses the slurry in the inner tank 2 into the interior of the rotating shaft 21, and then pushes the one-way plate 23 inward to rotate, exposing the liquid hole, and the slurry enters the rotating shaft 21 through the liquid hole. Furthermore, when the piston 252 moves downward, the space is compressed, and the pressure in the rotating shaft 21 increases, which can push the one-way plate 23 outward, tightly against the inner wall of the rotating shaft 21, blocking the liquid hole, thereby preventing the slurry in the rotating shaft 21 from entering the inner tank 2.

[0038] The driving assembly includes a driving motor 24 fixedly connected to the top of the inner tank 2, and the output end of the driving motor 24 is connected to the rotating shaft 21 through a synchronous belt 241, wherein a synchronous wheel can be installed at the output end of the driving motor 24, and a synchronous wheel can also be fixed at a corresponding position on the surface of the rotating shaft 21. The synchronous belt 241 is respectively transmitted on the surfaces of the two synchronous wheels. Through the rotation of the driving motor 24, the synchronous wheel drives the synchronous belt 241, and then drives the rotating shaft 21 to rotate.

[0039] It is worth noting that the rotation of the rotating shaft 21 will synchronously drive the connecting pipe 22 with the belt 241 to rotate, and then drive the auxiliary frame 3 on its surface to rotate, stirring the slurry in the gap cavity 33. Therefore, the slurry in the gap cavity 33 and the inner tank 2 can be stirred at the same time, thereby improving energy utilization.

[0040] A plurality of stirring blades 211 are fixedly connected to the surface of the rotating shaft 21. Through the output of the above-mentioned driving component, the rotation of the rotating shaft 21 can drive the stirring blades 211 to rotate synchronously, stirring the slurry located in the inner tank 2, thereby improving the uniformity of the pre-slurry preparation before the two liquids are mixed.

[0041] like Figure 4As shown, in this embodiment, a blocking component is further included, which is arranged inside the connecting tube 22. The blocking component includes a blocking block 221 that slides inside the connecting tube 22. The blocking block 221 slides sealingly inside the connecting tube 22. The blocking block 221 is connected to the connecting tube 22 through a tension spring 222. Under normal conditions, that is, when the tension spring 222 is in a relaxed state, the blocking block 221 is located below the connection position between the connecting tube 22 and the auxiliary frame 3, so it will not block the slurry in the connecting tube 22 from entering the auxiliary frame 3. Under normal conditions, the bottom of the blocking block 221 is at an atmospheric pressure state.

[0042] Specifically, when the piston 252 moves upward, the air pressure in the rotating shaft 21 and the connecting pipe 22 decreases. At this time, not only will the one-way plate 23 rotate toward the inside of the rotating shaft 21, but the stirring blade 211 will also move upward under the push of the air pressure at its bottom, thereby blocking the connecting position inside the connecting pipe 22 and the auxiliary frame 3, thereby preventing the slurry inside the auxiliary frame 3 from being back-sucked into the connecting pipe 22 and the rotating shaft 21, and only sucking in the slurry in the inner tank 2. Accordingly, when the piston 252 moves downward, the piston 252 pushes the slurry downward to press the blocking block 221, so that the blocking block 221 returns to its original position under the action of the rebound force of the tension spring 222, connecting the connecting pipe 22 and the connecting position inside the auxiliary frame 3, thereby facilitating the slurry to enter the auxiliary frame 3 and be subsequently discharged.

[0043] Several sliders 32 are sliding on the surface of the auxiliary frame 3, and cutting leaves 321 are set on both sides of the slider 32. The cutting leaves 321 on both sides of the slider 32 are staggered with each other. The two staggered cutting leaves 321 are easy to generate shear force, and then the two liquids are sheared and mixed during stirring, thereby improving the mixing efficiency.

[0044] Furthermore, several of the sliders 32 are connected by a connecting belt 322, and a limiting block 323 is fixedly connected to the surface of the connecting belt 322. A limiting groove 324 adapted to the limiting block 323 is provided on the inner wall of the tank body 1. The limiting groove 324 is provided around the inner wall of the tank body 1 and is a surrounding groove connected end to end. The limiting groove 324 is arranged in a wavy shape with a highest point and a lowest point of different heights.

[0045] Specifically, the auxiliary frame 3 is rotated to drive the cutting blades 321 on its surface to stir the slurry. Several sliders 32 are connected by a connecting belt 322, and the limit block 323 on the surface of the connecting belt 322 slides in the limit groove 324. According to the different angles of rotation of the auxiliary frame 3 driven by the connecting pipe 22, the height of the limit block 323 in the limit groove 324 is different, so it will drive several sliders 32 to move up and down synchronously, so that the cutting blades 321 can generate shear vortexes up and down, thereby improving the efficiency of two-liquid mixing and further reducing the uneven stirring and mixing phenomenon caused by liquid stratification in the two-liquid mixing.

[0046] The connecting belt 322 is a stainless steel belt. The stainless steel belt has a certain degree of ductility and bending performance. It can provide stable support and ductility when the slider 32 slides on the curved surface of the auxiliary frame 3, ensuring the synchronization of the movements of the multiple sliders 32.

[0047] The bottom of the connecting tube 22 is fixedly connected to a spiral blade 27, which is arranged in the discharge port 13. When the connecting tube 22 rotates, the spiral blade 27 is driven by the synchronous belt 241 to rotate, and the mixed two liquids in the gap cavity 33 are discharged through the spiral blade 27 to achieve discharge.

[0048] The bottom of the discharge port 13 is fixedly connected to a delivery pipe 14. The double liquid discharged from the bottom of the discharge port 13 can be directly delivered to the grouting equipment through the delivery pipe 14, or can be delivered to the grouting equipment after being pressurized by a pump body for grouting.

[0049] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make more forms of equivalent embodiments based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A pulping and storage device for a TBM, comprising a tank body (1), wherein the top and bottom of the tank body (1) are respectively provided with a feed port A (12) and a discharge port (13), characterized in that: It also includes an inner tank (2) arranged inside the tank body (1), a feed port B (26) is provided on the top of the inner tank (2), a gap cavity (33) is formed between the outer surface of the inner tank (2) and the inner surface of the tank body (1), the bottom of the gap cavity (33) is connected to the discharge port (13), and is rotatably connected to a connecting pipe (22), a surface of the connecting pipe (22) is provided with a plurality of auxiliary frames (3) adapted to the gap cavity (33), a surface of the auxiliary frame (3) is provided with a plurality of discharge holes (31), the connecting pipe (22) is connected to the interior of the inner tank (2), and a feeding assembly is provided inside the inner tank (2); After the feeding component feeds the slurry in the inner tank (2) into the connecting pipe (22), the slurry is discharged into the gap cavity (33) through a plurality of discharge holes (31) on the surface of the auxiliary frame (3) and mixed with the slurry in the gap cavity (33); The invention also comprises a driving assembly for stirring the auxiliary rack (3) in the gap cavity (33).

2. A slurry preparation and storage device for TBM according to claim 1, characterized in that: The feeding assembly comprises a rotating shaft (21) passing through the interior of the inner tank (2); the bottom of the rotating shaft (21) is fixedly connected to the connecting pipe (22); a piston (252) slides inside the rotating shaft (21); a one-way assembly is provided on the surface of the rotating shaft (21); a cylinder (25) is fixedly connected to the top of the inner tank (2); the output end of the cylinder (25) extends into the interior of the rotating shaft (21) and is connected to the piston (252) via a connecting rod (251).

3. The slurry preparation and storage device for TBM according to claim 2, characterized in that: The one-way assembly comprises a one-way plate (23); a liquid hole adapted to the one-way plate (23) is provided on the surface of the rotating shaft (21); the one-way plate (23) is connected to the rotating shaft (21) via a movable shaft (231); and the one-way plate (23) can only rotate toward the inside of the rotating shaft (21).

4. A slurry preparation and storage device for TBM according to claim 1 or 2, characterized in that: The driving assembly comprises a driving motor (24) fixedly connected to the top of the inner tank (2), and an output end of the driving motor (24) is connected to the rotating shaft (21) via a synchronous belt (241).

5. The slurry preparation and storage device for TBM according to claim 1, characterized in that: The device further comprises a blocking assembly arranged inside the connecting tube (22), wherein the blocking assembly comprises a blocking block (221) sliding inside the connecting tube (22), wherein the blocking block (221) is connected to the connecting tube (22) via a tension spring (222), and under normal conditions, the blocking block (221) is located below the position where the connecting tube (22) is connected to the auxiliary frame (3).

6. The slurry preparation and storage device for TBM according to claim 1, characterized in that: A plurality of sliders (32) are slidably mounted on the surface of the auxiliary frame (3), and cutting leaves (321) are provided on both sides of the slider (32). The cutting leaves (321) on both sides of the slider (32) are staggered.

7. The slurry preparation and storage device for TBM according to claim 6, characterized in that: The plurality of sliders (32) are connected via a connecting belt (322), a limiting block (323) is fixedly connected to the surface of the connecting belt (322), and a limiting groove (324) adapted to the limiting block (323) is provided on the inner wall of the tank body (1).

8. The slurry preparation and storage device for TBM according to claim 7, characterized in that: The connecting belt (322) is a stainless steel belt.

9. The slurry preparation and storage device for TBM according to claim 1, characterized in that: The bottom of the connecting pipe (22) is fixedly connected with a spiral blade (27), and the spiral blade (27) is inserted into the discharge port (13).

10. The slurry preparation and storage device for TBM according to claim 1, characterized in that: The bottom of the discharge port (13) is fixedly connected with a delivery pipe (14).

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