Foundation pit limiting device

Abstract

The utility model discloses a foundation pit limiting device, which relates to the technical field of foundation pit limiting, and comprises a foundation pit supporting wall, two fixing seats are fixedly arranged at the top of the foundation pit supporting wall, a winding mechanism is arranged at the tops of the two fixing seats, the winding mechanism comprises a winding shaft, bearing seats are fixedly arranged at the tops of the two fixing seats, and the bearing seats are arranged on the bearing seats. Two winding rollers are fixedly arranged on the winding shaft, ropes are connected to the two winding rollers, a lifting mechanism is arranged at the bottom ends of the two ropes, the lifting mechanism comprises a rolling shaft, and mounting lantern rings are fixedly arranged at the bottom ends of the two ropes. A steel belt penetrates through a foundation pit and is hung on a hook, a rolling shaft is located above the steel belt, the steel belt and the rolling shaft freely descend till the steel belt makes contact with the bottom, at the moment, the two ends of the rolling shaft shield a light path between a laser transmitter and a laser receiver, and therefore the laser receiver cannot receive signals transmitted by the laser transmitter; the control module controls the equipment to stop working, and the situation that the equipment cannot stop in time, steel belts are accumulated in the foundation pit, and the production schedule is affected is avoided.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit limiting technology, and more specifically to a foundation pit limiting device. Background Technology

[0002] An excavation pit is a pit dug according to the foundation design location, base elevation, and foundation plan dimensions. Before excavation, an excavation plan should be determined based on geological and hydrological data, combined with the conditions of nearby buildings, and waterproofing and drainage work should be carried out. For shallow excavations, slope protection can be used to stabilize the soil slope, with the slope determined according to relevant construction regulations. For deeper excavations or those near nearby buildings, excavation pit wall support methods, shotcrete wall protection methods, and even methods such as diaphragm walls and interlocking column-type bored piles can be used to prevent the outer soil layer from collapsing.

[0003] Existing limiting devices for foundation pit excavation utilize laser emitters and receivers to stop the equipment by having the steel strip touch the bottom and block the laser. However, because the steel strip in existing products is too narrow, it cannot block the laser emitter, resulting in the equipment not stopping in time and the steel strip accumulating in the foundation pit, affecting the production schedule. Summary of the Invention

[0004] The purpose of this invention is to provide a foundation pit limiting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a foundation pit limiting device, including a foundation pit support wall. Two fixed seats are fixedly installed on the top of the foundation pit support wall. A winding mechanism is installed on the top of the two fixed seats. The winding mechanism includes a winding shaft. Bearing seats are fixedly installed on the top of each of the two fixed seats. The two ends of the winding shaft pass through the two bearing seats and are rotatably engaged with them. Two winding rollers are fixedly installed on the winding shaft. Ropes are connected to the two winding rollers. A lifting mechanism is installed at the bottom of each of the two ropes. The lifting mechanism includes a roller. Mounting collars are fixedly installed at the bottom of each of the two ropes. The two ends of the roller are respectively located inside the two mounting collars. Mounting frames are fixedly installed at both ends of the roller. Pulleys are installed on each of the two mounting frames, and the pulleys contact the inner wall of the foundation pit support wall.

[0006] As a further improvement to this technical solution, a rotating wheel is fixedly provided at one end of the winding shaft, a stud is provided through the rotating wheel, a screw hole adapted to the stud is provided on the side wall of the fixed seat, and multiple through holes for the stud to pass through are provided on the rotating wheel.

[0007] As a further improvement to this technical solution, the mounting collar includes a first half-ring and a second half-ring. The first half-ring is hinged to the second half-ring. Fixing plates are fixedly installed on the side ends of both the first and second half-rings, and fastening bolts are installed through the two fixing plates.

[0008] As a further improvement to this technical solution, a laser emitter is provided on one side of the foundation pit support wall, and a laser receiver is provided on the other side of the foundation pit support wall, with the laser emitter and laser receiver being compatible.

[0009] As a further improvement to this technical solution, a hook is fixedly provided at the bottom of the roller, and the hook is used to suspend the steel strip.

[0010] As a further improvement to this technical solution, a buffer rubber block is fixedly installed at the bottom of the inner side of the foundation pit support wall, and the buffer rubber block is used to resist the pulley.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. By setting up a lifting mechanism, the steel strip passes through the pit and is suspended on the hook, with the roller positioned above the steel strip. The steel strip and roller are allowed to descend freely until the steel strip touches the bottom. At this point, the two ends of the roller block the light path between the laser emitter and the laser receiver. Therefore, the laser receiver cannot receive the signal emitted by the laser emitter. The control module controls the equipment to stop working, preventing the equipment from failing to stop in time, which would cause the steel strip to accumulate in the pit and affect the production progress.

[0013] 2. By setting an installation collar, the second half-ring can be flipped down by removing the fastening bolts. The roller can be removed by opening the second half-ring, which facilitates the inspection and maintenance of the roller and pulley. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model winding mechanism;

[0016] Figure 3 This is a structural schematic diagram of the lifting mechanism of the utility model;

[0017] Figure 4 This is a schematic diagram of the installation collar structure for the utility model.

[0018] The meanings of the labels in the diagram are as follows:

[0019] 1. Pit support wall; 2. Fixing seat; 3. Winding mechanism; 31. Winding shaft; 32. Bearing seat; 33. Winding roller; 34. Rotary wheel; 35. Stud; 36. Through hole; 4. Rope; 5. Lifting mechanism; 51. Roller; 52. Mounting collar; 521. First half ring; 522. Second half ring; 523. Fixing plate; 524. Fastening bolt; 53. Mounting bracket; 54. Pulley; 55. Hook; 6. Laser emitter; 7. Laser receiver; 8. Buffer block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Please see Figures 1-4As shown, this utility model provides a foundation pit limiting device, including a foundation pit support wall 1. The transverse cross-section of the foundation pit support wall 1 is a rectangular structure. Two fixed seats 2 are fixedly installed on the top of the foundation pit support wall 1. A winding mechanism 3 is installed on the top of the two fixed seats 2. The winding mechanism 3 includes a winding shaft 31. Bearing seats 32 are fixedly installed on the top of each of the two fixed seats 2. The two ends of the winding shaft 31 pass through the two bearing seats 32 respectively and are rotatably engaged with the two bearing seats 32. Two winding rollers 33 are fixedly installed on the winding shaft 31. Ropes 4 are connected to each of the two winding rollers 33. A rotating wheel 34 is fixedly installed at one end of the winding shaft 31. The rotating wheel 34 drives the take-up shaft 31 to rotate, which in turn drives two winding rollers 33 to rotate. The two winding rollers 33 rotate to wind up the two ropes 4. A stud 35 is installed through the rotating wheel 34. The side wall of the fixing base 2 has a screw hole that matches the stud 35. The rotating wheel 34 has multiple through holes 36 for the stud 35 to pass through. When the rotating wheel 34 stops rotating, in order to prevent the two ropes 4 from unwinding, the stud 35 passes through a through hole 36 and is installed in the screw hole on the side wall of the fixing base 2. The rotating wheel 34 is fixed by the stud 35, and the take-up shaft 31 is fixed by the rotating wheel 34.

[0023] Two ropes 4 are equipped with lifting mechanisms 5 at their bottom ends. Each lifting mechanism 5 includes a roller 51. Each rope 4 has a fixed mounting collar 52 at its bottom end. The roller 51 has two ends located inside the two mounting collars 52. A hook 55 is fixedly installed at the bottom of the roller 51 for suspending a steel strip. By winding up the two ropes 4, the roller 51 at the bottom of the pit is pulled upwards, allowing the steel strip to pass through the pit and be suspended on the hook 55, placing the roller 51 above the steel strip. The bolt 35 is then removed to release the restriction on the two ropes 4, allowing the steel strip and roller 51 to descend freely until the steel strip touches the bottom. Mounting brackets 53 are fixedly installed at both ends of the roller 51. Each mounting bracket 53 has a pulley 54, which contacts the inner wall of the pit support wall 1. The pulleys 54 are in contact with the inner wall of the pit support wall 1. The roller 51 is limited to prevent it from shaking when moving up and down. The roller 54 and the inner wall of the pit support wall 1 experience rolling friction, resulting in low friction. A laser emitter 6 is installed on one side of the pit support wall 1, and a laser receiver 7 is installed on the other side. The laser emitter 6 and laser receiver 7 are compatible. A buffer block 8 is fixedly installed at the bottom inner side of the pit support wall 1. The buffer block 8 is used to abut the roller 54. When the steel belt contacts the bottom of the pit, the two ends of the roller 51 block the light path between the laser emitter 6 and the laser receiver 7. Therefore, the laser receiver 7 cannot receive the signal emitted by the laser emitter 6, and the control module stops the equipment from working. This is existing technology, where the buffer block 8 abuts the roller 54 to provide buffer protection.

[0024] The mounting collar 52 includes a first half-ring 521 and a second half-ring 522. The first half-ring 521 is hinged to the second half-ring 522. Fixing plates 523 are fixedly installed on the sides of both the first half-ring 521 and the second half-ring 522. Fastening bolts 524 are installed through the two fixing plates 523. The fastening bolts 524 are used in conjunction with nuts. The second half-ring 522 can be flipped downward by removing the fastening bolts 524. The roller 51 can be removed by opening the second half-ring 522, which facilitates the inspection and maintenance of the roller 51 and the pulley 54.

[0025] The specific working principle of this utility model is as follows: Rotating the rotating wheel 34 drives the winding shaft 31 to rotate, which in turn drives two winding rollers 33 to rotate. The two winding rollers 33 rotate to wind up the two ropes 4, thereby pulling the roller 51 at the bottom of the pit upwards. A stud 35 is inserted through a through hole 36 and installed in a screw hole on the side wall of the fixing base 2. The rotating wheel 34 is fixed by the stud 35, and the winding shaft 31 is fixed by the rotating wheel 34. This allows the steel strip to pass through the pit and be suspended on the hook 55, thus allowing the roller 51 to... Located above the steel belt, the stud 35 is removed to release the restriction on the two ropes 4, allowing the steel belt and roller 51 to descend freely until the steel belt touches the bottom. The roller 51 is limited by the pulley 54 contacting the inner wall of the pit support wall 1, so that the roller 51 will not shake when it moves up and down. When the steel belt touches the bottom of the pit, the two ends of the roller 51 block the light path between the laser emitter 6 and the laser receiver 7. Therefore, the laser receiver 7 cannot receive the signal emitted by the laser emitter 6, and the control module controls the equipment to stop working.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A foundation pit limiting device, comprising a foundation pit support wall (1), characterized in that: The top of the foundation pit support wall (1) is fixedly provided with two fixed seats (2), and the top of the two fixed seats (2) is provided with a winding mechanism (3). The winding mechanism (3) includes a winding shaft (31). The top of the two fixed seats (2) is fixedly provided with a bearing seat (32). The two ends of the winding shaft (31) pass through the two bearing seats (32) respectively and are rotatably engaged with the two bearing seats (32). The winding shaft (31) is fixedly provided with two winding rollers (33). The two winding rollers (33) are provided with two winding rollers (33). A rope (4) is connected to the bottom of the two ropes (4), and a lifting mechanism (5) is provided at the bottom of the two ropes (4). The lifting mechanism (5) includes a roller (51). An installation collar (52) is fixedly provided at the bottom of the two ropes (4). The two ends of the roller (51) are respectively located inside the two installation collars (52). An installation frame (53) is fixedly provided at both ends of the roller (51). A pulley (54) is provided on the two installation frames (53). The pulley (54) is in contact with the inner wall of the foundation pit support wall (1).

2. The foundation pit limiting device according to claim 1, characterized in that: One end of the take-up shaft (31) is fixedly provided with a rotating wheel (34), and a stud (35) is provided through the rotating wheel (34). The side wall of the fixed base (2) is provided with a screw hole that matches the stud (35), and the rotating wheel (34) is provided with multiple through holes (36) for the stud (35) to pass through.

3. The foundation pit limiting device according to claim 1, characterized in that: The mounting collar (52) includes a first half-ring (521) and a second half-ring (522). The first half-ring (521) is hinged to the second half-ring (522). Fixing plates (523) are fixedly installed on the side ends of the first half-ring (521) and the second half-ring (522). Fastening bolts (524) are installed through the two fixing plates (523).

4. The foundation pit limiting device according to claim 1, characterized in that: A laser emitter (6) is provided on one side of the foundation pit support wall (1), and a laser receiver (7) is provided on the other side of the foundation pit support wall (1). The laser emitter (6) and the laser receiver (7) are compatible.

5. The foundation pit limiting device according to claim 1, characterized in that: The bottom of the roller (51) is fixedly provided with a hook (55), which is used to suspend the steel strip.

6. The foundation pit limiting device according to claim 1, characterized in that: A buffer block (8) is fixedly installed on the bottom inner side of the foundation pit support wall (1), and the buffer block (8) is used to resist the pulley (54).

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