Shield conveying device for subway construction

Abstract

A shield material conveying device for subway construction comprises a conveying auger and a conveying belt, the conveying auger is obliquely distributed, a feeding port of the conveying auger is used for receiving soil materials in a shield soil bin, a discharging port of the conveying auger is connected with the conveying belt, and the conveying belt comprises an inclined section capable of being connected with the discharging port and a horizontal section connected to the rear portion of the inclined section. A soil discharge articulated chute, a stone discharge articulated chute and an acceleration mechanism are sequentially arranged at the discharge hole from top to bottom; the upper end of the soil outlet elephant trunk is connected with a sorting hole formed in the lower edge of the discharging port, only soil materials penetrate through the sorting hole, so that stones with the outer diameter larger than that of the sorting hole enter the stone discharging elephant trunk, and the lower end of the soil outlet elephant trunk points to the inclined section; the stone discharging elephant trunk allows stones to enter the acceleration mechanism, and the acceleration mechanism is used for pushing the stones to the inclined section in the conveying direction of the inclined section. The probability that stones roll down on the inclined section of the conveying belt can be reduced, and the processing difficulty and the processing intensity of personnel are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of subway shield construction, in particular to a shield feeding device for subway construction. Background Art

[0002] During the shield excavation construction of the subway tunnel, the excavated soil needs to be discharged in time through the feeding device. The common feeding device in this field usually consists of a conveying auger and a conveyor belt. The feed port of the conveying auger is set in the shield soil bin to receive soil, and the discharge port is connected to the starting end of the conveyor belt. In actual applications, due to the structural limitations of the site and the power mechanism of the conveying auger itself, the conveyor belt often includes an inclined section and a horizontal section connected to the rear of the inclined section, and the inclined section is connected to the discharge port of the conveying auger. As a result, when the soil contains heavier stones, after the stones fall from the conveying auger to the inclined section, the belt cannot generate enough friction on the stones, causing the stones to roll backwards, and further accumulate under the inclined section.

[0003] In order to solve this technical problem, a subway shield construction feeding device is disclosed, which is provided with an inclined separation channel, and separates and collects larger soil and stone blocks through the separation channel, which will not affect the normal feeding. However, the stones separated by the separation channel still need to be collected and processed by personnel, which is still cumbersome. Summary of the invention

[0004] The present invention aims to provide a shield feeding device for subway construction, which reduces the probability of stones rolling down on the inclined section of the conveyor belt and greatly reduces the handling difficulty and handling intensity of personnel.

[0005] In order to solve the above technical problems, the specific scheme adopted by the present invention is: a shield feeding device for subway construction, including a conveying auger and a conveyor belt, the conveying auger is inclined, its feed port is used to receive soil in the shield soil bin, and its discharge port is connected to the conveyor belt, the conveyor belt includes an inclined section that can be connected to the discharge port and a horizontal section connected to the rear of the inclined section, and the discharge port is provided with a soil discharge chute, a stone discharge chute and an acceleration mechanism in sequence from top to bottom; the upper end of the soil discharge chute is connected to a sorting hole opened at the lower edge of the discharge port, the sorting hole is only for soil to pass through, and the stones with an outer diameter larger than the sorting hole enter the stone discharge chute, and the lower end of the soil discharge chute points to the inclined section; the stone discharge chute is for stones to enter the acceleration mechanism, and the acceleration mechanism is used to push the stones onto the inclined section along the conveying direction of the inclined section.

[0006] Preferably, the acceleration mechanism includes an acceleration cylinder distributed along the conveying direction of the inclined section and a partition arranged in the acceleration cylinder, the partition divides the inner cavity of the acceleration cylinder into a temporary storage chamber and an acceleration chamber, the temporary storage chamber is connected to the stone discharge chute, a push rod is slidably penetrated through the partition itself, and an excitation component is provided in the acceleration chamber that can drive the push rod to slide to push the stones in the temporary storage chamber to the inclined section.

[0007] Preferably, the excitation assembly is dynamically connected to the belt body of the inclined section.

[0008] Preferably, the excitation assembly includes a spring sleeved on the push rod and a driving shaft and a driven shaft rotatably arranged in the acceleration cylinder; one end of the spring is fixed on the push rod, and the other end is fixed to the acceleration cylinder; a friction wheel and a first cam are provided on the driving shaft, and the friction wheel contacts and frictionally fits with the belt body of the inclined section; a second cam and a winding drum are provided on the driven shaft, and the convex portion of the second cam partially overlaps with the rotation trajectory of the convex portion of the first cam, and a pull wire is fixed on the winding drum, and the free end of the pull wire is fixedly connected to the push rod.

[0009] Preferably, the first cam comprises a circular wheel body fixed on the driving shaft and a lever fixed at the outer edge of the wheel body, and a roller which is rotatably provided at the outer end of the lever and which rolls with the convex portion of the second cam.

[0010] Preferably, a linear bearing seat for sliding cooperation with the ejector rod is provided in the acceleration cylinder, and the spring is located between the partition plate and the linear bearing seat.

[0011] Preferably, an intermediate wheel is provided in the acceleration cylinder, and the pull wire is passed around the intermediate wheel so that the portion of the pull wire connected to the push rod is parallel to the push rod.

[0012] Preferably, a top plate for ejecting stones is provided on the top rod.

[0013] In the present invention, larger stones can be screened out from the soil through the sorting holes, the soil enters the inclined section normally, and the stones enter the acceleration mechanism. The acceleration mechanism can give the screened stones a certain initial velocity, and the direction of the initial velocity is distributed along the conveying direction of the inclined section, thereby reducing the friction required for continuous conveying of the stones and greatly reducing the probability of the stones rolling down from the belt of the inclined section. Therefore, the present invention not only reduces the rolling of stones, but also has a simple process and does not require excessive human intervention in the operation.

[0014] In a preferred embodiment of the present invention, the acceleration mechanism is connected to the belt body on the inclined section without external power input, so that the present invention is easy to modify based on existing equipment, which greatly increases the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the acceleration mechanism part in the present invention;

[0017] Markings in the figure: 1. conveying auger, 101. feed port, 102. discharge port, 2. conveyor belt, 201. horizontal section, 202. inclined section, 2021. belt body, 3. unearthed chute, 4. stone discharge chute, 5. acceleration mechanism, 501. acceleration cylinder, 502. friction wheel, 503. top plate, 504. partition, 505. spring, 506. linear bearing seat, 507. push rod, 508. pull wire, 509. intermediate wheel, 510. winding drum, 511. driven shaft, 512. second cam, 513. roller, 514. lever, 515. wheel body, 516. driving shaft, 517. first cam, 6. sorting hole, 518. acceleration chamber, 519. temporary storage chamber. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, a shield feeding device for subway construction of the present invention is the same as the soil material conveying device for shield machines in the prior art in that both mainly include a conveying auger 1 and a conveyor belt 2. The conveying auger 1 is tilted, and its feed port 101 on the left is used to insert into the shield soil bin and receive the soil excavated by the shield machine; its discharge port 102 on the right is used to dock with the conveyor belt 2. The conveyor belt 2 includes an inclined section 202 on the left and a horizontal section 201 on the right, wherein the inclined section 202 is located below the discharge port 102 of the conveying auger 1 to receive the soil, and the horizontal section 201 is used for subsequent transportation of the soil.

[0019] Different from the prior art, the present invention can screen soil and larger stones, so that the soil falls normally on the inclined section 202 and is normally transported by the inclined section 202; a certain initial velocity is given to the stones along the transport direction of the inclined section 202, so that the stones are not easily rolled down from the inclined section 202 due to insufficient friction of the belt body 2021 of the inclined section 202. Specifically:

[0020] The discharge port 102 of the conveying auger 1 is provided with a soil discharge chute 3, a stone discharge chute 4 and an acceleration mechanism 5 in sequence from top to bottom.

[0021] The upper end of the soil discharge chute 3 is fixed to the lower edge of the discharge port 102, and corresponds to the sorting hole 6 opened at the lower edge of the discharge port 102. The upper end of the stone discharge chute 4 is directly connected to the lower end of the discharge port 102 via a connecting flange, and the lower end is connected to the acceleration mechanism 5. The sorting hole 6 is for soil to pass through and fall on the inclined section 202 through the soil discharge pipe, while larger stones with an outer diameter larger than the sorting hole 6 cannot pass through the sorting hole 6 and fall into the acceleration mechanism 5 through the stone discharge chute 4.

[0022] like Figure 2As shown, the acceleration mechanism 5 includes an acceleration cylinder 501 distributed longitudinally along the inclined section 202, and a partition 504 distributed transversely is provided in the acceleration cylinder 501, so that the inner cavity of the acceleration cylinder 501 is divided into a temporary storage cavity 519 located on the right and an acceleration cavity 518 located on the left through the partition 504. The temporary storage cavity 519 is connected to the lower end of the above-mentioned stone discharge chute 4 for temporary storage of stones discharged from the stone discharge chute 4. An excitation component is provided in the acceleration cavity 518, and the excitation component is used to continuously push the stones in the temporary storage cavity 519 and drop them on the inclined section 202, so as to prevent the stones from rolling down along the inclined section 202 when the stones obtain a certain initial velocity.

[0023] The excitation assembly includes a push rod 507, a driving shaft 516 and a driven shaft 511. The push rod 507 is distributed along the longitudinal direction of the acceleration cylinder 501, and its two ends respectively pass through the partition 504 and the linear bearing seat 506 fixed in the acceleration cylinder 501, and can slide along the longitudinal direction of the acceleration cylinder 501. The right end of the push rod 507 is located in the temporary storage chamber 519 and is fixed with a top plate 503, so as to directly push the stone through the top plate 503 with a larger area. A spring 505 is also sleeved on the push rod 507 between the partition 504 and the linear bearing seat 506, and the right end of the spring 505 is welded to the push rod 507, and the right end touches the right end surface of the linear bearing seat 506.

[0024] The driving shaft 516 and the driven shaft 511 are respectively rotated with the cylinder wall of the acceleration cylinder 501. The friction wheel 502 and the circular wheel body 515 that rotate coaxially with the driving shaft 516 are arranged at intervals on the driving shaft 516. After the lower edge of the friction wheel 502 passes through the acceleration cylinder 501, it contacts and frictionally cooperates with the upper edge of the belt body 2021 of the inclined section 202, so that the friction wheel 502 can be driven to rotate synchronously during the movement of the belt body 2021, and further drive the driving shaft 516 and the wheel body 515 on the driving shaft 516 to rotate synchronously. The rim of the friction wheel 502 is made of rubber material, which is pressed and matched with the belt body 2021 and produces a certain deformation, thereby ensuring the friction cooperation between the friction wheel 502 and the belt body 2021. The wheel body 515 is provided with a lever 514 distributed along its radial direction, and a roller 513 is provided at the outer end of the lever 514, and a first cam 517 is formed by the wheel body 515, the lever 514 and the roller 513. A second cam 512 and a winding drum 510 are provided on the driven shaft 511 at intervals, and rotate coaxially with the driven shaft 511. The second cam 512 is used to cooperate with the first cam 517, and the convex parts of the two partially overlap on their respective rotation tracks, so that the roller 513 in the first cam 517 can contact the convex part of the second cam 512 during the self-rotation process, and the second cam 512 rotates with the continuous rotation of the first cam 517. A pull wire 508 is provided on the winding drum 510, and the left end of the pull wire 508 is fixed to the winding drum 510, and the right end is fixedly connected to the left end of the above-mentioned push rod 507 after passing through the intermediate wheel 509 provided in the acceleration cylinder 501.

[0025] Based on the above structure, during the conveying process when the roller of the inclined section 202 rotates in the clockwise direction, the top belt body 2021 generates a rightward linear motion, and drives the friction wheel 502, the driving shaft 516 and the first cam 517 to rotate in the counterclockwise direction synchronously. When the roller 513 in the first cam 517 rotates to the lower right of the convex part of the second cam 512, it contacts the convex part of the second cam 512, so as to make the second cam 512, the driven shaft 511 and the winding drum 510 rotate in the clockwise direction. The rotation of the winding drum 510 pulls the push rod 507 to move leftward through the pull wire 508 and compresses the spring 505 until the roller 513 continues to rotate with the driving shaft 516 and passes over the convex part of the second cam 512. The spring 505 releases its elastic potential energy due to the loss of the wave force, driving the push rod 507 to move rightward quickly, thereby pushing the stone in the temporary storage chamber 519 out through the top plate 503, and the acceleration mechanism 5 in the present invention is also reset to the state as shown in the figure. Figure 2 The initial state shown in the figure is then repeated in this way to achieve continuous accelerated discharge of stones.

Claims

1. A shield feeding device for subway construction, comprising a conveying auger (1) and a conveyor belt (2), wherein the conveying auger (1) is inclined, its feed port (101) is used to receive soil in a shield soil bin, its discharge port (102) is connected to the conveyor belt (2), and the conveyor belt (2) comprises an inclined section (202) that can be connected to the discharge port (102) and a horizontal section (201) connected to the rear of the inclined section (202), characterized in that: The discharge port (102) is provided with a soil discharge chute (3), a stone discharge chute (4) and an acceleration mechanism (5) in sequence from top to bottom; the upper end of the soil discharge chute (3) is connected to a sorting hole (6) provided at the lower edge of the discharge port (102); the sorting hole (6) is only for soil to pass through, so that stones with an outer diameter larger than the sorting hole (6) enter the stone discharge chute (4); the lower end of the soil discharge chute (3) points to the inclined section (202); the stone discharge chute (4) allows stones to enter the acceleration mechanism (5); the acceleration mechanism (5) is used to push the stones along the conveying direction of the inclined section (202) onto the inclined section (202).

2. A shield feeding device for subway construction as claimed in claim 1, characterized in that: The acceleration mechanism (5) comprises an acceleration cylinder (501) distributed along the conveying direction of the inclined section (202) and a partition (504) arranged in the acceleration cylinder (501); the partition (504) divides the inner cavity of the acceleration cylinder (501) into a temporary storage cavity (519) and an acceleration cavity (518); the temporary storage cavity (519) is connected to the stone discharge chute (4); a push rod (507) penetrating the partition (504) is slidably provided on the partition (504); and an excitation component capable of driving the push rod (507) to slide so as to push the stones in the temporary storage cavity (519) onto the inclined section (202) is provided in the acceleration cavity (518).

3. A shield feeding device for subway construction as claimed in claim 2, characterized in that: The excitation component is dynamically connected to the belt body (2021) of the inclined section (202).

4. A shield feeding device for subway construction as claimed in claim 3, characterized in that: The excitation component comprises a spring (505) sleeved on a push rod (507) and a driving shaft (516) and a driven shaft (511) rotatably arranged in an acceleration cylinder (501); one end of the spring (505) is fixed on the push rod (507), and the other end is fixed to the acceleration cylinder (501); a friction wheel (502) and a first cam (517) are arranged on the driving shaft (516), and the friction wheel (502) contacts and frictionally cooperates with a belt body (2021) of the inclined section (202); a second cam (512) and a winding drum (510) are arranged on the driven shaft (511), and the convex part of the second cam (512) partially overlaps with the rotation track of the convex part of the first cam (517), and a pull wire (508) is fixedly arranged on the winding drum (510), and the free end of the pull wire (508) is fixedly connected to the push rod (507).

5. A shield feeding device for subway construction as claimed in claim 4, characterized in that: The first cam (517) comprises a circular wheel body (515) fixed on the driving shaft (516) and a lever (514) fixed on the outer edge of the wheel body (515); a roller (513) rotatably provided on the outer end of the lever (514) and configured to roll with the convex portion of the second cam (512).

6. A shield feeding device for subway construction as claimed in claim 4, characterized in that: A linear bearing seat (506) for slidingly matching the ejector rod (507) is provided in the acceleration cylinder (501), and the spring (505) is located between the partition plate (504) and the linear bearing seat (506).

7. A shield feeding device for subway construction as claimed in claim 4, characterized in that: An intermediate wheel (509) is arranged in the acceleration cylinder (501), and the intermediate wheel (509) is used for the pull wire (508) to pass around so that the portion where the pull wire (508) is connected to the top rod (507) is parallel to the top rod (507).

8. A shield feeding device for subway construction as claimed in claim 4, characterized in that: A top plate (503) for ejecting stones is provided on the top rod (507).

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