An automatic shearing device for the mud outlet of a spiral excavator in an earth pressure balance shield tunneling machine.

Abstract

This invention discloses an automatic shearing device for the mud outlet of a spiral excavator in an earth pressure balance tunnel boring machine (TBM). It includes an outlet pipe connected to the mud outlet pipe of the spiral excavator and cylinder seats on its left and right sides. A first rotating cylinder and a second rotating cylinder, rotating in opposite directions, are respectively mounted on the two cylinder seats. A first U-shaped shear, formed by a first shearing plate and two first rotating arms, is rotated by the first rotating cylinder. A second U-shaped shear, formed by a second shearing plate and two second rotating arms, is rotated by the second rotating cylinder. The second U-shaped shear and the first U-shaped shear are nested together. This invention can automatically cut and clean the clay adhering to the mud outlet of the spiral excavator, avoiding equipment malfunctions caused by mud outlet blockage and preventing personal injury accidents due to gushing during manual clay cleaning. This reduces safety risks and improves the efficiency of TBM excavation.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine technology, and in particular to an automatic shearing device for the mud outlet of the spiral excavator of an earth pressure balance tunnel boring machine. Background Technology

[0002] In trenchless engineering, the auger excavator is a crucial component of earth pressure balance tunnel boring machines (TBMs). Its auger shaft extends into the slurry chamber, which is pressurized during operation. Under the combined pressure of the chamber and the rotating auger shaft, the soil is expelled from the auger excavator. During construction, the TBM encounters various soil types, with highly viscous soil being particularly challenging for the auger excavator. When clay travels through the auger shaft to the discharge port, its viscosity causes residue buildup, eventually leading to blockages and prolonged high-load operation of the auger excavator. This can cause overheating of the power unit and mechanical failure. To ensure successful soil removal, manual cleaning is typically used. However, this method carries the risk of soil gushing from the discharge port and potential personal injury during cleaning. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic shearing device for the mud outlet of the spiral excavator of an earth pressure balance shield tunneling machine, so as to solve the problems of the mud outlet of the spiral excavator being blocked by sticky soil and difficult to clean, and the safety accidents that are prone to occur during cleaning.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: an automatic shearing device for the mud outlet of the spiral excavator of an earth pressure balance shield tunneling machine, comprising:

[0005] The outlet pipe is connected to the sludge discharge pipe of the spiral auger.

[0006] There are two cylinder seats, which are respectively installed on the left and right sides of the outlet pipe;

[0007] A first rotary cylinder is mounted on one of the cylinder seats;

[0008] The second rotary cylinder is mounted on another cylinder seat, and the rotation direction of the second rotary cylinder is opposite to that of the first rotary cylinder.

[0009] There are two first rotating arms. One first rotating arm is fixedly mounted on the rotating shaft of the first rotating cylinder between the outlet pipe and the first cylinder seat. The other first rotating arm is hinged to the rotating shaft of the second rotating cylinder between the outlet pipe and the second rotating cylinder.

[0010] A first shearing plate is disposed between the two first rotating arms, and the first shearing plate and the two first rotating arms form a first U-shaped shear;

[0011] There are two second rotating arms. One second rotating arm is fixedly mounted on the rotating shaft of the second rotating cylinder between the outlet pipe and the second cylinder seat. The other second rotating arm is hinged to the rotating shaft of the first rotating cylinder between the outlet pipe and the first cylinder seat.

[0012] The second shear plate is connected between the two second rotating arms. The second shear plate and the two second rotating arms form a second U-shaped shear. The second U-shaped shear and the first U-shaped shear are nested together. The rotation radii of the first U-shaped shear and the second U-shaped shear are both greater than the circumcircle radius of the outlet pipe and both are greater than the distance between the rotating axis and the outlet pipe.

[0013] Furthermore, in the automatic shearing device for the auger of the earth pressure balance shield tunneling machine provided by the present invention, both the first and second rotary cylinders are replaced by torque motors.

[0014] Furthermore, in the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield machine provided by the present invention, the outer surfaces of the first shearing plate of the first U-shaped shear and the second shearing plate of the second U-shaped shear are both toothed surfaces.

[0015] Furthermore, the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided by the present invention has a paint coating on its tooth surface.

[0016] Furthermore, the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided by the present invention has teeth formed by hard alloy parts welded to the outer surface of the shear plate, and the hard alloy parts are sharpened and quenched.

[0017] Furthermore, in the automatic shearing device for the auger of the earth pressure balance shield tunneling machine provided by the present invention, the rotation angles of the first and second rotating cylinders are both greater than 90 degrees.

[0018] Furthermore, the automatic shearing device for the mud outlet of the spiral soil discharge machine of the earth pressure balance shield machine provided by the present invention is wherein the outlet pipe and the mud discharge pipe are connected by a flange and flange bolts.

[0019] Furthermore, the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield machine provided by the present invention removes the outlet pipe and replaces the outlet pipe with the mud outlet pipe of the spiral excavator.

[0020] Furthermore, in the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided by the present invention, the rotation radius of the first rotating arm is greater than that of the second rotating arm, the first U-shaped shear is located on the outside, and the second U-shaped shear is located on the inside.

[0021] Furthermore, in the automatic shearing device for the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided by the present invention, the rotation radius of the first rotating arm is smaller than that of the second rotating arm, the first U-shaped shear is located on the inner side, and the second U-shaped shear is located on the outer side.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The automatic shearing device at the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided by this invention, when the first and second rotating cylinders rotate in opposite directions, drive the first U-shaped shear formed by two first rotating arms and a first shear plate and the second U-shaped shear formed by two second rotating arms and a second shear plate to rotate in opposite directions. When the first U-shaped shear and the second U-shaped shear encounter the clay adhering to them at the outlet pipe, the clay is cut off by the alternating first shear plate on the first U-shaped shear and the second shear plate on the second U-shaped shear. This automatically cuts and cleans the clay adhering to the mud outlet of the spiral excavator, avoiding equipment failure caused by blockage of the mud outlet of the spiral excavator, avoiding personal injury accidents caused by gushing during manual cleaning of clay, reducing the safety risk of shield tunneling excavation, and improving shield tunneling and excavation efficiency without the need for machine shutdown for cleaning. Attached Figure Description

[0024] Figure 1 This is a side view diagram of the automatic shearing device at the discharge port of the spiral excavator of an earth pressure balance shield tunneling machine connected to the discharge pipe of the spiral excavator.

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the automatic shearing device at the mud outlet of the spiral soil discharge machine of an earth pressure balance shield machine.

[0026] As shown in the figure:

[0027] 100. Automatic shearing device at the mud outlet of the spiral excavator of the earth pressure balance shield machine; 101. Outlet pipe; 102. Cylinder seat; 103. First rotating cylinder; 104. Second rotating cylinder; 105. First rotating arm; 106. First shearing plate; 107. Second rotating arm; 108. Second shearing plate; 109. Hard alloy parts; 110. Mud outlet pipe; 111. Flange; 112. Flange bolts. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0029] Please refer to Figures 1 to 2This invention provides an automatic shearing device 100 for the mud outlet of a spiral excavator in an earth pressure balance shield tunneling machine, comprising an outlet pipe 101, a cylinder seat 102, a first rotating cylinder 103, a second rotating cylinder 104, a first rotating arm 105, a first shearing plate 106, a second rotating arm 107, and a second shearing plate 108, wherein:

[0030] The outlet pipe 101 is connected to the sludge discharge pipe 110 of the spiral auger. The outlet pipe 101 is a square pipe that matches the outlet end of the sludge discharge pipe 110. To improve the reliability of the connection, the outlet pipe 101 and the sludge discharge pipe 110 can be connected by a flange 111 and flange bolts 112.

[0031] There are two cylinder seats 102, which are respectively installed on the left and right sides of the outlet pipe 101. The two cylinder seats 102 can be distributed on the horizontal center line of the outlet pipe 101.

[0032] The first rotary cylinder 103 is mounted on a cylinder seat 102.

[0033] The second rotary cylinder 104 is mounted on another cylinder seat 102, and the rotation direction of the second rotary cylinder 104 is opposite to that of the first rotary cylinder 103. The cylinder seat 102 is used to fix the two rotary cylinders together, so that the two rotary cylinders 103 are fixedly mounted on the outlet pipe 101 through the cylinder seat 102.

[0034] There are two first rotating arms 105. One first rotating arm 105 is fixedly mounted on the rotating shaft of the first rotating cylinder 103 between the outlet pipe 101 and the first cylinder seat 102. The other first rotating arm 105 is hinged to the rotating shaft of the second rotating cylinder 104 between the outlet pipe 101 and the second rotating cylinder 104. The fixed mounting of the first rotating arm 105 to the rotating shaft of the first rotating cylinder 103 can be achieved by a key, pin, or bolt. The hinge connection between the first rotating arm 105 and the rotating shaft of the second rotating cylinder 104 can be achieved by a bearing.

[0035] A first shearing plate 106 is disposed between the two first rotating arms 105, forming a first U-shaped shear. When the first rotating cylinder 103 rotates, it drives the first rotating arm 105 connected to it to rotate. The first shearing plate 106 connected to the rotating first rotating arm 105 drives the other first rotating arm 105 to rotate synchronously. At this time, since the first rotating arm 105 hinged to the rotating shaft of the second rotating cylinder 104 does not rotate with the second rotating cylinder 104, the overall rotation of the first U-shaped shear is achieved.

[0036] There are two second rotating arms 107. One second rotating arm 107 is fixedly mounted on the rotating shaft of the second rotating cylinder 104 between the outlet pipe 101 and the second cylinder seat 102. The other second rotating arm 107 is hinged to the rotating shaft of the first rotating cylinder 103 between the outlet pipe 101 and the first cylinder seat 102. The fixed mounting of the second rotating arm 107 to the rotating shaft of the second rotating cylinder 104 can also be achieved by a key, pin, or bolt. The hinge connection between the second rotating arm 107 and the rotating shaft of the first rotating cylinder 103 can also be achieved by a bearing.

[0037] The second shearing plate 108 is connected between the two second rotating arms 107. The second shearing plate 108 and the two second rotating arms 107 form a second U-shaped shear. The second U-shaped shear and the first U-shaped shear are nested together. The rotation radii of the first U-shaped shear and the second U-shaped shear are both greater than the circumcircle radius of the outlet pipe 101 and both greater than the distance between the rotating shaft and the outlet pipe 101. That is, the rotation radii of the first rotating arm 105 and the second rotating arm 107 are both greater than the circumcircle radius of the outlet pipe 101 and both greater than the distance between the rotating shaft and the outlet pipe 101. At this time, when the second rotating cylinder 104 rotates in the opposite direction, it drives the second rotating arm 107 connected to it to rotate. The second shearing plate 108 connected to the rotating second rotating arm 107 drives the other second rotating arm 107 to rotate synchronously. At this time, since the second rotating arm 105, which is hinged to the first rotating cylinder 103, does not rotate with the first rotating cylinder 103, the overall rotation of the second U-shaped shear is achieved. The clay adhering to the outlet of the outlet pipe 101 is cut off by the intersection of the first U-shaped shear and the second U-shaped shear.

[0038] The automatic shearing device 100 at the mud outlet of the spiral excavator of the earth pressure balance shield tunneling machine provided in this embodiment of the invention, when the first and second rotating cylinders 103 and 104 rotate in opposite directions, drive the first U-shaped shear formed by the two first rotating arms 105 and the first shear plate 106 and the second U-shaped shear formed by the two second rotating arms 107 and the second shear plate 108 to rotate in opposite directions. When the first U-shaped shear and the second U-shaped shear encounter the clay adhering to them at the outlet pipe 101, the clay is cut off by the alternating first shear plate 106 on the first U-shaped shear and second shear plate 108 on the second U-shaped shear, thereby automatically cutting and cleaning the clay adhering to the mud outlet of the spiral excavator, avoiding equipment failure caused by blockage of the mud outlet of the spiral excavator, avoiding personal injury accidents caused by gushing phenomena when manually cleaning clay, reducing the safety risk of shield tunneling excavation, and improving shield tunneling and excavation efficiency without the need for machine shutdown for cleaning.

[0039] The automatic shearing device 100 of the auger excavator of the earth pressure balance shield tunneling machine provided in this embodiment of the invention is connected to the auger excavator's discharge pipe 110 through the outlet pipe 101. When the automatic shearing device 100 malfunctions, it can be removed from the auger excavator's discharge pipe 110 for maintenance, so as not to affect the construction of the auger excavator, without stopping the machine, and further improve the shield excavation efficiency.

[0040] To achieve the opposite rotation of the first and second U-shaped shears while ensuring the torque for cutting the clay, the automatic shearing device 100 at the mud outlet of the auger of the earth pressure balance shield tunneling machine provided in this embodiment of the invention replaces both the first rotary cylinder 103 and the second rotary cylinder 104 with torque motors. In this case, the two torque motors rotate in opposite directions.

[0041] Please refer to Figure 1 To facilitate the shearing of clay adhering to the outlet of the outlet pipe 101, the automatic shearing device 100 of the auger excavator of the earth pressure balance shield tunneling machine provided in this embodiment of the invention has toothed outer surfaces on the first shearing plate 106 of the first U-shaped shear and the second shearing plate 108 of the second U-shaped shear. The toothed surfaces can divide large-section clay into smaller-section clay for sectional shearing, thereby making the clay easier to cut and improving the shearing effect.

[0042] To prevent the cut clay from adhering to the first shear plate 106 and the second shear plate 108, the automatic shearing device 100 at the mud outlet of the auger of the earth pressure balance shield tunneling machine provided in this embodiment of the invention has a paint coating on its tooth surface. The paint coating can prevent clay from adhering and cause the cut clay to fall off.

[0043] To improve service life, the automatic shearing device 100 at the mud outlet of the auger of the earth pressure balance shield tunneling machine provided in this embodiment of the invention has teeth formed by a cemented carbide component welded to the outer surface of the shear plate. This cemented carbide component is sharpened and hardened. This improves the wear resistance of the teeth and extends their service life.

[0044] To ensure complete shearing of the clay at the discharge port, the automatic shearing device 100 for the auger excavator of the earth pressure balance shield tunneling machine provided in this embodiment of the invention has a rotation angle greater than 90 degrees for both the first rotary cylinder 103 and the second rotary cylinder 104. For example, it can be 180 degrees. In this case, the first shearing plate 106 of the first U-shaped shear and the second shearing plate 108 of the second U-shaped shear can exceed the horizontal centerline of the outlet pipe 101, so that the first shearing plate 106 and the second shearing plate 108 form a staggered intersection to shear and cut the clay.

[0045] Without considering the removal and maintenance of the automatic shearing device 100, the automatic shearing device 100 of the auger excavator of the earth pressure balance shield machine provided in this embodiment of the invention removes the outlet pipe 101 and replaces the outlet pipe 101 with the outlet pipe 110 of the auger excavator. At this time, the automatic shearing device 100 and the auger excavator are integrated into one structure.

[0046] Please refer to Figure 2 In order to achieve nested rotation of the first U-shaped shear and the second U-shaped shear, the automatic shearing device 100 of the auger of the earth pressure balance shield machine provided in this embodiment of the invention has a rotation radius of the first rotating arm 105 that is greater than that of the second rotating arm 107. At this time, the first U-shaped shear is located on the outside and the second U-shaped shear is located on the inside.

[0047] In order to achieve nested rotation of the first U-shaped shear and the second U-shaped shear, the automatic shearing device 100 of the auger of the earth pressure balance shield machine provided in this embodiment of the invention has a rotation radius of the first rotating arm 105 that is smaller than that of the second rotating arm 107. In this case, the first U-shaped shear is located on the inner side and the second U-shaped shear is located on the outer side.

[0048] The automatic shearing device 100 for the mud outlet of the spiral excavator of the earth pressure balance shield machine provided in this embodiment of the invention has a shearing function, which can effectively solve the problem of equipment failure caused by clay adhesion at the mud outlet.

[0049] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. An automatic shearing device for the mud outlet of the auger of an earth pressure balance shield tunneling machine, characterized in that, include: The outlet pipe is connected to the sludge discharge pipe of the spiral auger. There are two cylinder seats, which are respectively installed on the left and right sides of the outlet pipe; A first rotary cylinder is mounted on one of the cylinder seats; The second rotary cylinder is mounted on another cylinder seat, and the rotation direction of the second rotary cylinder is opposite to that of the first rotary cylinder. There are two first rotating arms. One first rotating arm is fixedly mounted on the rotating shaft of the first rotating cylinder between the outlet pipe and the first cylinder seat. The other first rotating arm is hinged to the rotating shaft of the second rotating cylinder between the outlet pipe and the second rotating cylinder. A first shearing plate is disposed between the two first rotating arms, and the first shearing plate and the two first rotating arms form a first U-shaped shear; There are two second rotating arms. One second rotating arm is fixedly mounted on the rotating shaft of the second rotating cylinder between the outlet pipe and the second cylinder seat. The other second rotating arm is hinged to the rotating shaft of the first rotating cylinder between the outlet pipe and the first cylinder seat. The second shear plate is connected between the two second rotating arms. The second shear plate and the two second rotating arms form a second U-shaped shear. The second U-shaped shear and the first U-shaped shear are nested together. The rotation radii of the first U-shaped shear and the second U-shaped shear are both greater than the circumcircle radius of the outlet pipe and both are greater than the distance between the rotating axis and the outlet pipe.

2. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, Both the first and second rotary cylinders are replaced by torque motors.

3. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The outer surfaces of the first shearing plate of the first U-shaped shear and the second shearing plate of the second U-shaped shear are both toothed surfaces.

4. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 3, characterized in that, The tooth surface is coated with a paint coating.

5. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 3, characterized in that, The toothed surface is formed by a cemented carbide part welded to the outer surface of the shear plate, the cemented carbide part being sharpened and hardened.

6. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The rotation angles of both the first and second rotary cylinders are greater than 90 degrees.

7. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The outlet pipe and the sludge discharge pipe are connected by flanges and flange bolts.

8. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The outlet pipe is removed and replaced with the mud discharge pipe of the spiral soil excavator.

9. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The rotation radius of the first rotating arm is greater than that of the second rotating arm, the first U-shaped shear is located on the outside, and the second U-shaped shear is located on the inside.

10. The automatic shearing device for the mud outlet of the auger excavator of the earth pressure balance shield machine according to claim 1, characterized in that, The rotation radius of the first rotating arm is smaller than that of the second rotating arm, the first U-shaped shear is located on the inner side, and the second U-shaped shear is located on the outer side.

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