Shield tunneling machine segment crane limiting device

Abstract

The utility model discloses a shield tunneling machine segment crane limiting device which comprises a stand column, a cross beam, a deflector rod, a limiting switch assembly, a segment machine supporting beam, a segment machine rotation moving frame, a segment crane, a cross-shaped limiting switch and a segment machine working platform, and the segment machine working platform is fixed to the segment machine rotation moving frame and moves along with the segment machine rotation moving frame; the cross beam is a rectangular steel pipe, an open groove is formed in the middle of one wide side of the cross beam in the length direction, the open groove of the cross beam is upwards welded to the tops of the stand columns, the two deflector rods are perpendicularly welded to the same side faces of the two ends of the cross beam respectively, and the limiting switch assembly is arranged in the middle of the cross beam in the length direction. The bottom ends of the stand columns are welded to a segment machine working platform and located at the two ends of a segment crane walking track or fixed to the limiting position. And the cross-shaped limit switch is arranged on a duct piece crane wheel box of a traveling device of the duct piece crane. The device can avoid the risks of equipment damage, extrusion, falling impact and the like caused by misoperation, and is simple, compact and flexible and convenient to arrange.

Description

Technical Field

[0001] This utility model relates to a limiting device for tunnel boring machine segment hoisting, belonging to the field of tunnel boring machine segment hoisting assembly technology. Background Technology

[0002] The tunnel boring machine (TBM) segment assembly system mainly consists of a segment assembler, a segment crane, and a segment transport trolley. The segment crane, driven by a drive unit, moves the trolley along a track beam. The trolley's electric hoist lifts and lowers the segments, transporting them from the trolley to the segment assembler's working area. During operation, the segment crane's travel limit switches are crucial for ensuring safe and precise segment lifting operations. Support beam limit devices are typically located at both ends of the crane's travel track or at fixed limit positions. Cross-shaped limit switches are usually mounted on the crane body and move synchronously with it. When the crane reaches the limit device area, the support beam limit device interacts with the cross-shaped limit switch, triggering a limit action. The existing arrangement of the segment crane's limiting device has the following problems: 1) At the segment assembly machine, the beam limiting device is arranged on the segment assembly machine's beam at the corresponding position at the end of the travel track. When the segment assembly machine moves backward and stops at the rear end for assembly work as needed, the segment machine's moving frame will block the beam limiting device. When the segment crane moves forward to the segment assembly machine, the cross limit switch cannot trigger the limiting action, causing the segment crane to collide with the segment assembly machine's moving frame; 2) Similarly, when the segment crane moves to the travel track at the segment assembly machine... When the end-triggered limit switch stops, the segment assembly machine moves backward according to the assembly operation. Because the segment assembly machine lacks a trigger stop device such as a cross-shaped limit switch, the segment crane collides with the moving frame of the segment assembly machine. 3) During this process, all actions of the segment crane and segment assembly machine are controlled by the operator using a handheld remote control. If there are occasional accidents such as poor communication and coordination among operators or lack of concentration, and the equipment cannot be controlled in time, as mentioned above, interference and collisions between the equipment may occur, damaging the equipment and potentially causing production safety accidents such as crushing or falling objects. Therefore, developing an interlocking limit device that can effectively ensure the connection between the segment crane and the segment assembly machine is particularly important. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a shield tunneling machine segment hoisting limit device to minimize the production safety risks such as equipment damage, crushing, and falling, in order to address the deficiencies of the existing technology.

[0004] To solve this technical problem, this utility model provides a shield tunneling machine segment hoisting limit device, including a column, a crossbeam, levers, a limit switch assembly, a segment machine support beam, a segment machine slewing frame, a segment hoist, a cross limit switch, and a segment machine working platform. The segment machine working platform is fixed on the segment machine slewing frame and moves together with it. The crossbeam is a rectangular steel pipe with an opening slot along its length on one side. The side of the crossbeam with the opening slot facing upwards and the non-opening slot side is welded to the top of the column. Two levers are vertically welded to the same side at both ends of the crossbeam. The limit switch assembly is arranged along the length of the crossbeam. The column is located at the middle position in the direction; the bottom end of the column is welded to the working platform of the segment machine, located at both ends of the traveling track of the segment crane or fixed at the limit position; the cross limit switch is set on the wheel box of the segment crane traveling device and can move synchronously with the segment crane. When the segment crane moves forward along the traveling track, the lever moves the cross limit lever of the cross limit switch before colliding with the segment crane slewing frame, triggering the limit action; when the segment crane slewing frame moves backward along the segment machine support beam, it enters the detection range of the limit switch assembly before colliding with the segment crane, triggering the segment crane slewing frame to stop at the limit position.

[0005] The length of the column is determined by the height of the cross limit switch, and the length of the lever is determined by its distance from the cross limit switch, ensuring that when the cross limit switch moves to the lever, it can rotate the cross limit lever and output a limit signal.

[0006] The distance between the two levers and the length of the crossbeam are determined by the inertial motion distance of the segment crane and the suspended load. The two levers rotate the cross limit lever of the cross limit switch twice, triggering the deceleration and stop signals of the segment crane respectively.

[0007] The relative front and rear positions of the limit switch assembly on the crossbeam are determined by the safe distance between the segment machine rotary moving frame and the segment crane when they approach each other.

[0008] The limit switch assembly includes a limit switch, clamps, screws, and T-nuts. There are two clamps, each with a round hole on both sides. The limit switch is positioned between the two clamps. The T-nuts are inserted through the opening slot on the end face of the crossbeam. The threads of the two T-nuts are aligned with the round holes on both sides of the clamps. The two screws are inserted through the round holes on both sides of the clamps into the T-nuts and tightened. By loosening the screws, the limit switch assembly can move along the opening slot of the crossbeam.

[0009] The clamping block is a square block made of plastic. After drilling a circular hole in the center of the square block, it is cut into two pieces along the center line of the square block. Each clamping block has a semi-circular groove on its side. The diameter of the circular hole is the same as the outer diameter of the limit switch. Circular through holes perpendicular to the center line are provided on both sides of the semi-circular groove.

[0010] One of the clamping blocks is placed at the middle position along the length of the crossbeam, with the axial direction of its semi-circular groove perpendicular to the length direction of the crossbeam opening slot. The circular through holes on both sides of the clamping block are aligned with one side of the crossbeam opening slot, and the semi-circular groove faces upward. The groove axes of the upper and lower clamping blocks are aligned, and the other clamping block is placed on the limit switch with its groove facing downward.

[0011] The lever is vertically welded to the narrow side plane on the same side of both ends of the crossbeam and points towards the segment machine support beam.

[0012] The length direction of the crossbeam is parallel to the inner edge of the working platform of the segment machine.

[0013] The limit switch is a cylindrical photoelectric sensor switch.

[0014] Beneficial Effects: This utility model's limiting device, arranged on the segmenting machine's working platform, ensures that the limiting action is triggered before the segmenting crane collides with the segmenting machine's rotating frame when moving forward along the travel track, and also ensures that the limiting action is triggered before the segmenting machine's rotating frame collides with the segmenting crane when moving backward along the segmenting machine's support beam. This minimizes the risk of equipment damage, crushing, and falling caused by operator error, greatly protecting the lives and property of construction units and operators. This utility model has a simple and compact structure, low manufacturing cost, and advantages of resource conservation and flexible and convenient layout. Attached Figure Description

[0015] Figure 1 This is a schematic front view of the structure of this utility model;

[0016] Figure 2 The right view is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a front view illustrating the installation of the limit switch assembly of this utility model;

[0018] Figure 4 This is a side view illustrating the installation of the limit switch assembly of this utility model;

[0019] Figure 5 This is a top view illustrating the installation of the limit switch assembly of this utility model;

[0020] Figure 6 This is a schematic diagram of the limit switch assembly of this utility model;

[0021] Figure 7 This utility model Figure 6 BB cross-sectional diagram;

[0022] Figure 8 This is a cross-sectional schematic diagram of the crossbeam and lever of this utility model;

[0023] Figure 9 This is a schematic diagram of the triggering mechanism of the cross limit switch of this utility model.

[0024] In the diagram: 1. Column; 2. Horizontal beam; 3. Lever; 4. Limit switch assembly; 5. Segment machine support beam; 6. Segment machine rotary moving frame; 7. Segment crane; 8. Cross limit switch; 9. Segment machine working platform; 10. Support beam limit device; 11. Traveling track; 12. Segment crane wheel box; 13. Cross limit lever; 401. Limit switch; 402. Clamping block; 403. Screw; 404. T-nut. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1-9 As shown, this utility model provides a shield tunneling machine segment hoisting limit device, including a column 1, a crossbeam 2, levers 3, a limit switch assembly 4, a segment machine support beam 5, a segment machine slewing frame 6, a segment hoist 7, a cross limit switch 8, and a segment machine working platform 9. The segment machine working platform 9 is fixed on the segment machine slewing frame 6 and moves together with it. The crossbeam 2 is a rectangular steel pipe with an opening slot in the middle of one of its wide sides along its length. The side of the crossbeam 2 with the opening slot facing upwards and the non-opening slot facing upwards is welded to the top of the column 1. Two levers 3 are respectively vertically welded to the same side at both ends of the crossbeam 2. The limit switch assembly 4 is arranged at the middle position along the length of the crossbeam 2. The bottom end of the column 1 is welded to the working platform 9 of the segment machine and located at both ends of the traveling track 11 of the segment crane 7 or fixed at the limit position; the cross limit switch 8 is set on the wheel box 12 of the segment crane 7's traveling device and can move synchronously with the segment crane 7. When the segment crane 7 moves forward along the traveling track 11, the lever 3 moves the cross limit lever 13 of the cross limit switch 8 before colliding with the segment crane slewing frame 6, triggering the limit action; when the segment crane slewing frame 6 moves backward along the segment machine support beam 5, it enters the detection range of the limit switch assembly 4 before colliding with the segment crane 7, triggering the segment crane slewing frame 6 to stop at the limit.

[0027] The cross limit switch 8 is located at the rear edge of the wheel box 12 of the segment hoist near the working platform 9 of the segment machine. The length of the column 1 is determined by the height of the cross limit switch 8, and the length of the lever 3 is determined by its distance from the cross limit switch 8, so as to ensure that when the cross limit switch 8 moves to the lever 3, it can move the cross limit lever 13 to rotate and output a limit signal.

[0028] The distance between the two levers 3 and the length of the crossbeam 2 are determined by the inertial motion distance of the segment crane 7 and the hoisted object: when the segment crane 7 suddenly stops carrying the hoisted object, due to inertia, the segment crane 7 and the hoisted object will continue to move forward a short distance. The greater the mass of the hoisted object, the longer the forward motion distance. Therefore, in addition to setting one lever 3 for stopping, another lever 3 is set for pre-deceleration to reduce the inertial effect of the segment crane 7 and the hoisted object. Since the mass of the segment crane 7 and the hoisted object, i.e. the segment mass, is relatively fixed according to the shield machine model, in practice, the distance from deceleration to stopping without significant inertial motion can be determined by field test and applied to other similar models. The two levers 3 rotate the cross limit lever 13 of the cross limit switch 8 twice, triggering the deceleration and stop signals of the segment crane 7 respectively, and finally making the segment crane 7 stop stably.

[0029] The relative front and rear positions of the limit switch assembly 4 on the crossbeam 2 are determined by the safe distance between the segment machine rotary moving frame 6 and the segment crane 7 when they approach each other.

[0030] The limit switch assembly 4 includes a limit switch 401, a clamping block 402, a screw 403, and a T-nut 404. There are two clamping blocks 402, and there are round holes on both sides of the clamping blocks 402. The limit switch 401 is disposed between the two clamping blocks 402. The T-nut 404 is inserted into the opening slot on the end face of the crossbeam 2. The threaded ends of the two T-nuts 404 are aligned with the round holes on both sides of the clamping blocks 402. The two screws 403 are inserted into the T-nuts 404 through the round holes on both sides of the clamping blocks 402 and tightened. By loosening the screws 403, the limit switch assembly 4 can move along the opening slot of the crossbeam 2.

[0031] The clamping block 402 is a square block made of plastic. After drilling a circular hole in the center of the square block, it is cut into two pieces along the center line of the square block. Each clamping block 402 has a semi-circular groove on its side. The diameter of the circular hole is the same as the outer diameter of the limit switch 401, and there are circular through holes perpendicular to the center line on both sides of the semi-circular groove.

[0032] One of the clamping blocks 402 is placed at the middle position along the length of the crossbeam 2, with the axis of its semi-circular groove perpendicular to the length of the opening slot of the crossbeam 2. The circular through holes on both sides of the clamping block 402 are aligned with one side of the opening slot of the crossbeam 2 and the semi-circular groove faces upward. The groove axes of the upper and lower clamping blocks 402 are aligned. The other clamping block 402 is placed on the limit switch 401 with its groove facing downward.

[0033] The lever 3 is vertically welded to the narrow side plane on the same side of both ends of the crossbeam 2 and points towards the segment machine support beam 5.

[0034] The length direction of the crossbeam 2 is parallel to the inner edge of the working platform 9 of the segment machine.

[0035] The column 1, lever 3, and crossbeam 2 are all rectangular steel pipes with open slots. The open slots can be used to set up spare sensors or clamps to fix sensor cables. Other round or rectangular profiles can also be used instead.

[0036] The limit switch 401 is a cylindrical photoelectric sensor switch.

[0037] This invention, based on the removal of the original support beam limiting device 10, re-arranges the limiting device on the segment machine working platform 9. When the segment crane 7 moves forward along the traveling track 11, before colliding with the segment machine rotary moving frame 6, the cross limit lever 13 of the cross limit switch 8 on the segment crane 7 contacts the lever 3. The two levers 3 twice rotate the cross limit lever 13 of the cross limit switch 8. The first rotation triggers the deceleration signal of the segment crane 7, ensuring that the segment crane 7 decelerates evenly. The second rotation triggers the stop signal of the segment crane 7, finally bringing the segment crane 7 to a stable stop. When the segment machine rotary moving frame 6 moves backward along the segment machine support beam 5, before colliding with the segment crane 7, the limit switch 401 of the upper limit switch assembly 4 on the cross beam 2 can detect the segment crane 7 and control the collision. The movement of the rotary moving frame 6 of the segmenter is stopped by a stop signal. The components consisting of the column 1, crossbeam 2, lever 3, limit switch assembly 4, rotary moving frame 6 of the segmenter, and segmenter working platform 9, and the component consisting of the segmenter crane 7 and cross limit switch 8, respectively detect the position of each other via limit switch 401 and cross limit switch 8 and issue stop signals to themselves. This ensures a safe distance between the segmenter crane 7 and the rotary moving frame 6 when the crane moves forward and stops, and also ensures a safe distance between the rotary moving frame 6 and the crane 7 when the crane moves backward and stops. This prevents collisions between the crane 7 and the rotary moving frame 6, minimizing equipment damage, crushing, and falling risks caused by operator error, and greatly protecting the lives and property of construction units and operators. This utility model has a simple and compact structure, low manufacturing cost, and advantages of resource conservation and flexible and convenient layout.

[0038] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A shield tunneling machine segment hoisting limiting device, characterized in that: The system includes a column (1), a crossbeam (2), levers (3), a limit switch assembly (4), a segmenter support beam (5), a segmenter rotary moving frame (6), a segmenter crane (7), a cross limit switch (8), and a segmenter working platform (9). The segmenter working platform (9) is fixed on the segmenter rotary moving frame (6) and moves with it. The crossbeam (2) is a rectangular steel pipe with an opening slot in the middle of one of its wide sides along the length direction. The opening slot of the crossbeam (2) faces upward, and the non-opening slot side is welded to the top of the column (1). Two levers (3) are respectively vertically welded to the same side at both ends of the crossbeam (2). The limit switch assembly (4) is arranged in the middle of the length direction of the crossbeam (2). The bottom end of the column (1) is welded to... The segment machine working platform (9) is located at both ends of the walking track (11) of the segment crane (7) or fixed at the limit position; the cross limit switch (8) is set on the segment crane wheel box (12) of the walking device of the segment crane (7) and can move synchronously with the segment crane (7). When the segment crane (7) moves forward along the walking track (11), before it collides with the segment crane rotary moving frame (6), the lever (3) moves the cross limit lever (13) of the cross limit switch (8) to trigger the limit action; when the segment crane rotary moving frame (6) moves backward along the segment machine support beam (5), before it collides with the segment crane (7), it enters the detection range of the limit switch assembly (4) and triggers the segment crane rotary moving frame (6) to limit stop.

2. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The length of the column (1) is determined by the height of the cross limit switch (8), and the length of the lever (3) is determined by its distance from the cross limit switch (8), ensuring that when the cross limit switch (8) moves to the lever (3), it can move the cross limit lever (13) to rotate and output a limit signal.

3. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The distance between the two levers (3) and the length of the crossbeam (2) are determined by the inertial motion distance of the segment crane (7) and the suspended object. The two levers (3) rotate the cross limit lever (13) of the cross limit switch (8) twice, triggering the deceleration and stop signals of the segment crane (7) respectively.

4. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The relative front and rear positions of the limit switch assembly (4) on the crossbeam (2) are determined by the safe distance between the segment machine rotary moving frame (6) and the segment crane (7) when they approach each other.

5. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The limit switch assembly (4) includes a limit switch (401), a clamp (402), a screw (403), and a T-nut (404). There are two clamps (402), and round holes are provided on both sides of the clamps (402). The limit switch (401) is located between the two clamps (402). The T-nut (404) is inserted into the opening slot on the end face of the crossbeam (2). The threaded ends of the two T-nuts (404) are aligned with the round holes on both sides of the clamps (402). The two screws (403) are inserted into the T-nuts (404) through the round holes on both sides of the clamps (402) and tightened. When the screws (403) are loosened, the limit switch assembly (4) can move along the opening slot of the crossbeam (2).

6. The shield tunneling machine segment hoisting limiting device according to claim 5, characterized in that: The clamping block (402) is a square block made of plastic. After drilling a circular hole in the center of the square block, it is cut into two pieces along the center line of the square block. Each clamping block (402) has a semi-circular groove on its side. The diameter of the circular hole is the same as the outer diameter of the limit switch (401). There are circular through holes perpendicular to the center line on both sides of the semi-circular groove. One of the clamping blocks (402) is placed in the middle of the length direction of the crossbeam (2). The axis of its semi-circular groove is perpendicular to the length direction of the opening slot of the crossbeam (2). The circular through holes on both sides of the clamping block (402) are aligned with one side of the opening slot of the crossbeam (2) and the semi-circular groove faces upward. The groove axes of the upper and lower clamping blocks (402) are aligned. The groove of the other clamping block (402) is placed on the limit switch (401) with the groove facing downward.

7. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The lever (3) is vertically welded to the narrow side plane on the same side of both ends of the crossbeam (2) and points towards the segment machine support beam (5).

8. The shield tunneling machine segment hoisting limiting device according to claim 1, characterized in that: The length direction of the crossbeam (2) is parallel to the inner edge of the working platform (9) of the segment machine.

9. The shield tunneling machine segment hoisting limiting device according to claim 5 or 6, characterized in that: The limit switch (401) is a cylindrical photoelectric sensor switch.

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