Screw conveyor for shield tunneling machine

Abstract

The utility model discloses a screw conveyor for a shield tunneling machine, which relates to the technical field of screw conveyors and comprises a conveying pipe mounted in the shield tunneling machine, a feeding pipe is fixed at one end of the conveying pipe, one end of the feeding pipe far away from a cutterhead of the shield tunneling machine is inclined upwards, and the feeding pipe is positioned below the rear side of the cutterhead of the shield tunneling machine. The conveying pipe is used for containing soil and broken stone smashed by a cutter head of the shield tunneling machine, and a conveying assembly used for conveying the soil and the broken stone is arranged in the conveying pipe. A scraping assembly used for scraping soil adhered to the inner wall of the conveying pipe is arranged at the top of the conveying pipe and comprises a wall scraping plate located in the conveying pipe, and a movable scraping block is arranged on one side of the wall scraping plate. The wall scraping plate is installed at the outer end of the spiral conveying blade on the spiral conveying rod through the installation rod, the reciprocating lead screw is used for driving the movable scraping block to move back and forth at the outer end of the wall scraping plate, soil attached to the wall scraping plate is scraped off, and it is guaranteed that the wall scraping plate can be normally used.

Description

Technical Field

[0001] The utility model relates to the technical field of screw machines, in particular to a screw machine for a shield machine. Background Art

[0002] The shield machine is a tunnel boring tool that uses the shield method to excavate tunnels. The machine has the characteristic of completing the tunnel excavation in one go. It can complete the excavation, advancement, and expansion by itself, which can increase the efficiency of subway underground excavation by 8 to 10 times. During the excavation process, the cutter head at the excavation end of the shield machine crushes the soil and rocks, and then uses the screw machine installed inside the shield machine to transport the crushed soil and gravel out to ensure the smooth progress of the shield machine excavation process.

[0003] The screw machine used in the shield machine in the prior art is shown in the patent application with publication number CN219009044U. While the screw conveyor blade is used to convey the crushed soil and gravel, the scraper can also be used to scrape off the mud adhering to the inner wall of the conveying pipe. However, the mud has a certain viscosity and is easy to adhere to and accumulate on the scraper. Too much mud accumulated on the scraper can easily affect the normal use of the scraper, resulting in the inability to continue to scrape off the mud adhering to the inner wall of the conveying pipe. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a spiral machine for a shield machine, which uses a mounting rod to mount the scraper plate on the outer end of the spiral conveying blade on the spiral conveying rod, and then uses a reciprocating screw to drive the moving scraper block to move back and forth on the outer end of the scraper plate to scrape off the soil adhered to the scraper plate, thereby ensuring that the scraper plate can be used normally.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a screw machine for a shield machine, comprising a conveying pipe installed inside the shield machine, a feed pipe is fixed to one end of the conveying pipe, an end of the feed pipe away from the shield machine cutter head is inclined upward, the feed pipe is located at the lower rear side of the shield machine cutter head, and is used to receive soil and gravel crushed by the shield machine cutter head;

[0006] The conveying pipe is provided with a conveying assembly for conveying soil and gravel;

[0007] The top of the conveying pipe is provided with a scraping assembly for scraping off the mud adhered to the inner wall of the conveying pipe;

[0008] The scraping assembly includes a scraper plate located inside the conveying pipe, the cross-section of the top end of the scraper plate is triangular, the top end of the scraper plate contacts the inner wall of the conveying pipe, a movable scraper block is provided on one side of the scraper plate, the bottom end of the movable scraper block is processed with a triangular opening, the triangular opening coincides with the top end of the scraper plate, the top end of the movable scraper block passes through the conveying pipe and extends out of the conveying pipe, a screw nut is fixed inside the top end of the movable scraper block, a reciprocating screw is threaded inside the screw nut, a second motor for driving the reciprocating screw to rotate is provided at one end of the reciprocating screw, the reciprocating screw is driven by the second motor to drive the movable scraper block to move back and forth on the top end of the scraper plate, so as to scrape off the soil adhered to the top end of the scraper plate.

[0009] Preferably, the top of the conveying pipe is fixedly connected to a protective shell, the top of the movable scraper block extends into the interior of the protective shell, both ends of the reciprocating screw are movably connected to the interior of the protective shell through bearings, one end of the reciprocating screw penetrates the protective shell and extends out of one side of the protective shell, and the second motor is located on one side of the protective shell.

[0010] Preferably, the conveying assembly comprises a spiral conveying rod arranged in the middle of the conveying pipe, the spiral conveying rod is composed of a rotating shaft and a spiral conveying blade, and the spiral conveying blade is fixed to the outer end of the rotating shaft;

[0011] One end of the spiral conveying rod passes through the conveying pipe and is fixed with a first motor that drives the spiral conveying rod to rotate. The first motor is located at one end of the conveying pipe away from the cutter head of the shield machine.

[0012] Preferably, a plurality of mounting rods are fixed to the bottom end of the scraper plate, and the bottom ends of the plurality of mounting rods are all fixed to the rotating shaft of the spiral conveying rod.

[0013] Preferably, the end of the rotating shaft of the spiral conveying rod away from the first motor is processed into a cone shape.

[0014] Preferably, the bottom of one end of the conveying pipe away from the feed pipe is fixedly connected to a discharge pipe, and soil and gravel enter the conveying pipe through the feed pipe, are conveyed by the spiral conveying rod, and are then discharged through the discharge pipe.

[0015] Compared with the prior art, the utility model provides a screw machine for a shield machine, which has the following beneficial effects:

[0016] 1. The scraper plate is installed on the outer end of the spiral conveying blade on the spiral conveying rod by using the mounting rod, and then the reciprocating screw is used to drive the movable scraper block to move back and forth on the outer end of the scraper plate to scrape off the mud adhering to the scraper plate. The movable scraper block is located at the outer end of the spiral conveying blade, so that it can move back and forth on the outer end of the spiral conveying rod to remove the mud adhering to the scraper plate, thereby ensuring that the scraper plate can normally scrape off the mud adhering to the inner wall of the conveying pipe.

[0017] 2. By setting the feed pipe away from one end of the conveying pipe in an inclined upward shape, it is helpful to receive the soil and gravel crushed by the single disc of the shield machine to ensure the smoothness of soil and gravel transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 Bottom view of

[0020] Figure 3 This is a schematic diagram of the structure of the spiral conveying rod of the utility model inside the conveying pipe;

[0021] Figure 4 For the utility model Figure 3 A magnified view of middle;

[0022] Figure 5 It is an exploded view of the spiral conveying rod, the wall hanging plate, the reciprocating screw rod and the movable scraper block of the utility model.

[0023] In the figure:

[0024] 1 conveying pipe, 2 discharge pipe, 3 feed pipe;

[0025] 4 conveying assembly, 41 spiral conveying rod, 42 first motor;

[0026] 5 scraping assembly, 51 mounting rod, 52 scraping plate, 53 moving scraping block, 54 reciprocating screw rod, 55 second motor, 56 protective shell, 57 screw rod nut. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-3 As shown in Figure 5, the utility model provides a screw machine for a shield machine, including a conveying pipe 1 installed inside the shield machine, a feed pipe 3 is fixed to one end of the conveying pipe 1, and the end of the feed pipe 3 away from the shield machine cutter head is inclined upward, and the feed pipe 3 is located at the lower rear side of the shield machine cutter head, and is used to receive soil and gravel crushed by the shield machine cutter head;

[0029] A conveying assembly 4 for conveying soil and gravel is provided inside the conveying pipe 1, and the conveying assembly 4 includes a spiral conveying rod 41 provided in the middle of the conveying pipe 1, one end of the spiral conveying rod 41 passes through the conveying pipe 1 and is fixed with a first motor 42 for driving the spiral conveying rod 41 to rotate, and the first motor 42 is located at the end of the conveying pipe 1 away from the cutter head of the shield machine, and the spiral conveying rod 41 can be driven to rotate by the first motor 42, and the soil and gravel entering the conveying pipe 1 through the feed pipe 3 can be conveyed to the end of the conveying pipe 1 away from the feed pipe 3 through the spiral conveying rod 41, and a discharge pipe 2 is fixedly connected to the bottom of the end of the conveying pipe 1 away from the feed pipe 3, and the soil and gravel entering the conveying pipe 1 can be discharged through the discharge pipe 2 after being conveyed by the spiral conveying rod 41;

[0030] Among them, the spiral conveying rod 41 of the utility model is composed of a rotating shaft and a spiral conveying blade, and the spiral conveying blade is fixed at the outer end of the rotating shaft. The end of the rotating shaft of the spiral conveying rod 41 away from the first motor 42 is processed into a cone shape. The conical design helps to prevent soil accumulation and blockage at the end of the spiral conveying rod 41.

[0031] Because the soil transported in the conveying pipe 1 has a certain viscosity, the soil is easy to adhere to the inner wall of the conveying pipe 1. In order to avoid blockage caused by the adhered soil, Figure 1 As shown, a scraping assembly 5 for scraping off the mud adhered to the inner wall of the conveying pipe 1 is provided at the top of the conveying pipe 1;

[0032] Specifically, Figure 4 and 5 As shown, the scraping assembly 5 includes a scraper plate 52 located inside the conveying pipe 1, and a plurality of mounting rods 51 are fixed to the bottom end of the scraper plate 52. The bottom ends of the plurality of mounting rods 51 are fixed to the rotating shaft of the spiral conveying rod 41, and the top end cross-section of the scraper plate 52 is triangular. The top end of the scraper plate 52 contacts the inner wall of the conveying pipe 1. While conveying soil and gravel, the rotating spiral conveying rod 41 will drive the scraper plate 52 to rotate inside the conveying pipe 1 through the mounting rod 51. Because the scraper plate 52 contacts the inner wall of the discharge pipe 2, the rotating scraper plate 52 can contact the soil adhered to the inner wall of the conveying pipe 1 and scrape off the soil during the rotation process to ensure the cleanliness of the inner wall of the conveying pipe 1.

[0033] Similarly, because the soil itself is sticky, the soil is also easy to adhere to the scraper plate 52. In order to remove the soil adhered to the scraper plate 52, as shown in FIG. Figure 4As shown, a movable scraper block 53 is provided on one side of the scraper plate 52, and the top end of the movable scraper block 53 passes through the conveying pipe 1 and extends out of the conveying pipe 1, a screw nut 57 is fixed inside the top end of the movable scraper block 53, and a reciprocating screw 54 is threaded inside the screw nut 57, and a second motor 55 for driving the reciprocating screw 54 to rotate is provided at one end of the reciprocating screw 54, and a protective shell 56 is fixedly connected to the top of the conveying pipe 1, and the top end of the movable scraper block 53 extends into the inside of the protective shell 56, and both ends of the reciprocating screw 54 are movably connected to the inside of the protective shell 56 through bearings, and one end of the reciprocating screw 54 passes through the protective shell 56 and extends out of one side of the protective shell 56, and the second motor 55 is located on one side of the protective shell 56;

[0034] By starting the second motor 55, the reciprocating screw 54 is driven to rotate by the second motor 55, and the movable scraper block 53 is driven to move back and forth inside the protective shell 56 by the reciprocating screw 54. Because the bottom end of the movable scraper block 53 is processed with a triangular opening, which coincides with the top of the scraper plate 52, the movable scraper block 53 can move back and forth at the top of the scraper plate 52 to scrape off the soil adhered to the top of the scraper plate 52, so as to ensure that the scraper plate 52 can be used normally.

[0035] It is worth noting that the control of the first motor 42 and the second motor 55 in the utility model is controlled by a single-chip microcomputer, and the single-chip microcomputer has a circuit for controlling the automatic resetting of the first motor 42 and the second motor 55, so that the second motor 55 drives the moving scraper block 53 to move back and forth on the top of the scraper plate 52. The specific circuit design in the single-chip microcomputer is a mature technical solution in the prior art, so it is not elaborated in the utility model.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A screw conveyor for a shield machine, comprising a conveying pipe (1) installed inside the shield machine, characterized in that: A feed pipe (3) is fixed at one end of the conveying pipe (1), and the end of the feed pipe (3) away from the shield machine cutter disc is inclined upward. The feed pipe (3) is located at the lower rear side of the shield machine cutter disc and is used to receive soil and gravel crushed by the shield machine cutter disc; The conveying pipe (1) is provided with a conveying assembly (4) for conveying soil and gravel; The top of the conveying pipe (1) is provided with a scraping assembly (5) for scraping off the mud adhering to the inner wall of the conveying pipe (1); The scraping assembly (5) comprises a scraping plate (52) located inside the conveying pipe (1), the top end of the scraping plate (52) having a triangular cross-section, the top end of the scraping plate (52) being in contact with the inner wall of the conveying pipe (1), a movable scraping block (53) being provided on one side of the scraping plate (52), the bottom end of the movable scraping block (53) being processed with a triangular opening, the triangular opening being consistent with the top end of the scraping plate (52), the top end of the movable scraping block (53) penetrating the conveying pipe (1) and extending out Outside the conveying pipe (1), a screw nut (57) is fixed inside the top of the movable scraper block (53), and a reciprocating screw (54) is threaded inside the screw nut (57). A second motor (55) is provided at one end of the reciprocating screw (54) for driving the reciprocating screw (54) to rotate. The reciprocating screw (54) is driven by the second motor (55) to drive the movable scraper block (53) to move back and forth on the top of the scraper plate (52) to scrape off the soil adhered to the top of the scraper plate (52).

2. A screw machine for a shield machine according to claim 1, characterized in that: The top of the conveying pipe (1) is fixedly connected to a protective shell (56), the top of the movable scraper (53) extends into the interior of the protective shell (56), both ends of the reciprocating screw rod (54) are movably connected to the interior of the protective shell (56) through bearings, one end of the reciprocating screw rod (54) passes through the protective shell (56) and extends out of one side of the protective shell (56), and the second motor (55) is located on one side of the protective shell (56).

3. The screw machine for a shield machine according to claim 1, characterized in that: The conveying assembly (4) comprises a spiral conveying rod (41) arranged in the middle of the conveying pipe (1), the spiral conveying rod (41) comprising a rotating shaft and a spiral conveying blade, and the spiral conveying blade is fixed to the outer end of the rotating shaft; One end of the spiral conveying rod (41) passes through the conveying pipe (1) and is fixed with a first motor (42) for driving the spiral conveying rod (41) to rotate. The first motor (42) is located at an end of the conveying pipe (1) away from the cutter head of the shield machine.

4. A screw machine for a shield machine according to claim 3, characterized in that: A plurality of mounting rods (51) are fixed to the bottom end of the scraper plate (52), and the bottom ends of the plurality of mounting rods (51) are all fixed to the rotating shaft of the spiral conveying rod (41).

5. The screw machine for a shield machine according to claim 3, characterized in that: The end of the rotating shaft of the spiral conveying rod (41) away from the first motor (42) is processed into a conical shape.

6. The screw machine for a shield machine according to claim 3, characterized in that: The bottom of one end of the conveying pipe (1) away from the feeding pipe (3) is fixedly connected to a discharging pipe (2); soil and gravel enter the conveying pipe (1) through the feeding pipe (3), are conveyed by the spiral conveying rod (41), and are then discharged through the discharging pipe (2).

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