Rapid building foundation pit waterproof curtain erecting vehicle and erecting method

Abstract

The invention discloses a rapid building foundation pit waterproof curtain erecting vehicle and method in the technical field of building foundation pit waterproofing. The rapid building foundation pit waterproof curtain erecting vehicle comprises a vehicle body and further comprises a laying arm mechanism and a curtain unwinding mechanism which are arranged on the vehicle body. At least two sets of laying arm mechanisms are arranged, each laying arm mechanism comprises a telescopic arm and a guide rope, the non-telescopic end of each telescopic arm is provided with a pair of rope winding devices, the telescopic end of each telescopic arm is provided with a steering wheel, the guide ropes pass through the steering wheels, and the two ends of each guide rope are connected with the two rope winding devices. A pair of rope winding devices is arranged on the telescopic arm and used for adapting to the length of the telescopic arm, a guide structure is formed on the telescopic arm, the curtain is pulled to be laid, the convenience of erecting the curtain in the air or laying the curtain on the ground is greatly improved through automatic setting, quick response is facilitated, and the influence of sudden rainfall is prevented.

Description

Technical Field

[0001] This invention relates to the field of waterproofing of building foundation pits, specifically to a rapid erection vehicle and erection method for waterproofing curtains used in building foundation pits. Background Technology

[0002] When rain occurs during foundation pit construction, measures need to be taken in multiple aspects, including drainage, slope protection, construction safety, and quality control, to ensure construction safety and project quality. Regarding slope protection, materials such as plastic sheeting and tarpaulins should be used to cover the foundation pit slopes to prevent rainwater from directly eroding the slope soil and reducing the risk of soil collapse due to rainwater soaking. It is also necessary to cover and protect raw materials such as steel bars and cement in the foundation pit to prevent rainwater from wetting and causing the steel bars to rust and the cement to become damp and clump. If concrete pouring is underway, the concrete surface should be covered in a timely manner to prevent rainwater from washing away it. In case of heavy rain, pouring should be stopped immediately, and the poured but not yet set concrete should be covered.

[0003] The aforementioned construction rain protection often requires manual opening of spare curtains to cover the surface of the foundation pit. Since the area of ​​the foundation pit varies, for large foundation pits, the method of manually carrying the curtains and opening them layer by layer is too inefficient and wastes a lot of manpower. The protection process for the foundation pit is too slow and cannot cope with sudden rainfall. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle and method for quickly erecting waterproof curtains for building foundation pits, which solves the problem of low efficiency in the existing manual erection of foundation pit curtains.

[0005] The present invention achieves the above objectives through the following technical solutions: A rapid erection vehicle for waterproof curtains in construction pits includes a vehicle body and components mounted on the vehicle body. The laying arm mechanism has at least two sets, including a telescopic arm and a guide rope. The non-telescopic end of the telescopic arm is provided with a pair of rope winding devices, and the telescopic end is provided with a steering wheel. The guide rope passes through the steering wheel and is connected at both ends to the two rope winding devices. A curtain unwinding mechanism for unwinding a curtain includes an unwinding roller. Pull cords are provided at the two corners of the curtain's ends. The pull cords are provided with fixing cylinders for fixing to guide cords, so that the guide cords can pull the curtain open when unwinding or rewinding.

[0006] As a preferred embodiment of the present invention, the vehicle body includes a frame with two sets of steering tires and retractable support legs located at the four corners of the frame. The frame is the main support structure of the erection vehicle, welded from high-strength steel, and has sufficient strength and rigidity to withstand various loads during the erection vehicle's travel and operation. The wheels use wear-resistant and pressure-resistant rubber tires or solid tires to adapt to different construction site road conditions. Some erection vehicles can be equipped with steering wheels to facilitate flexible turning of the vehicle around the pit. The support legs are used to support the vehicle body and keep it stable. The support legs adopt a telescopic structure, which can adjust the height according to the terrain of the pit and the operation requirements. The bottom of the support legs is equipped with anti-slip mats or support feet to increase the friction with the ground and the support area.

[0007] As a preferred embodiment of the present invention, the curtain unwinding mechanism further includes a first bracket mounted on the vehicle body and a motor mounted on the first bracket. The unwinding roller is mounted on the first bracket, and the end of the unwinding roller is provided with a transmission disc for transmission connection with the motor. In this embodiment, the curtain unwinding is driven by a motor, and the transmission disc can be a chain drive, gear drive, or belt drive.

[0008] As a preferred embodiment of the present invention, the curtain unwinding mechanism further includes a tensioning mechanism. The tensioning mechanism includes a tensioning drive component mounted on a first support and a tensioning roller mounted at the output end of the tensioning drive component. The tensioning roller is parallel to the unwinding roller. The tensioning mechanism is used to maintain the tension of the curtain and prevent the curtain from becoming loose or wrinkled. The tensioning drive component can be an adjustable spring, a hydraulic cylinder, or an electric telescopic rod. A pressure sensor is provided on the tensioning roller. A braking device and a speed regulating device can also be provided to the motor to control the curtain laying speed and stopping position in conjunction with the pressure sensor. When the pressure on the tensioning roller is insufficient, the unwinding speed is reduced, and when the pressure is excessive, the unwinding speed is increased.

[0009] As a preferred embodiment of the present invention, the vehicle body is provided with a lifting platform, and the lifting end of the lifting platform is provided with a rotating platform. The laying arm mechanism includes a second bracket provided on the rotating platform. The non-telescopic end of the telescopic arm is rotatably mounted on the second bracket, and an angle adjustment device is provided between the second bracket and the non-telescopic end of the telescopic arm. By providing the lifting platform, the height of the telescopic arm can be adjusted. In addition to laying the curtain, the curtain can also be erected in the air. The angle adjustment device is a hydraulic cylinder used to adjust the elevation angle of the telescopic arm. The rotating platform facilitates the storage of the two laying arm mechanisms.

[0010] As a preferred embodiment of the present invention, the telescopic end of the telescopic arm is provided with a housing, and at least two steering wheels are provided in the housing to prevent the guide rope from detaching from the steering wheels. The non-telescopic end of the telescopic arm is also provided with an hourglass-shaped roller to allow the guide rope to enter the housing. This embodiment allows the guide rope to adapt to the telescopic arm's extension and retraction by providing steering wheels at the farthest end of the telescopic arm.

[0011] As a preferred embodiment of the present invention, it further includes a liftable support mechanism, which is fixed to the ground or a separate vehicle. The support mechanism includes a base and a support column disposed on the base. The lifting end of the support column is connected to a docking part disposed at the bottom of the box body to support the non-extended end of the telescopic arm after it is extended. This embodiment improves stability by setting a lifting support mechanism to support the end after the telescopic arm is extended.

[0012] As a preferred embodiment of the present invention, the base is further provided with a vertical track, and a flange is provided on the opposite side of the track. The end of the fixed cylinder is provided with a limiting edge. The track and the flange are used to restrict the fixed cylinder to move only vertically after the limiting edge enters the track. By setting a vertical track, the fixed cylinder is restricted to return when it reaches the end point, so that the curtain can be kept taut during the downward lowering process.

[0013] As a preferred embodiment of the present invention, the top two sides of the track are provided with wedge pins that allow one-way entry of the active limiting edge. The wedge pins are pulled into the inner side of the track by a tension spring located on the outer side of the track to prevent the entering limiting edge from returning. Specifically, this embodiment is provided with a structure that restricts the return of the fixed cylinder.

[0014] To implement the above-mentioned device, the present invention also proposes a method for erecting a rapid erection vehicle for waterproof curtains in foundation pits based on any of the above-mentioned construction methods, comprising the following steps: S1: Move the vehicle body to both ends of the area to be covered at the edge of the pit, unfold the laying arm mechanism, align the laying arm mechanism with the laying area of ​​the pit as the track for setting up the curtain, and guide the rope to unwind during the unfolding of the laying arm mechanism. S2: Securely connect the pull rope at the end of the curtain to the guide rope on the erection track, and then pull the curtain open along the telescopic arm by unwinding one end of the guide rope and rewinding the other end. S3: Position the curtain and release the guide rope to lower the curtain into the area to be covered in the pit.

[0015] The beneficial effects of this invention are as follows: The rapid deployment vehicle can carry large-format waterproof tarpaulins at once, enabling rapid unfolding and laying with the help of mechanical power. This greatly shortens the construction cycle and speeds up the overall project progress. Especially for projects with tight schedules, it can effectively avoid delays in subsequent procedures caused by slow waterproof tarpaulin laying. Compared with manual laying of waterproof tarpaulins, this solution does not require workers to bend over and pull the tarpaulin for a long time, resulting in less physical exertion. Moreover, it effectively reduces safety risks when working in complex environments such as foundation pits. After the deployment vehicle is put into use, workers are mainly responsible for operating the equipment and monitoring the laying process, while most of the heavy physical labor is done by machinery. This not only reduces the labor intensity of workers but also reduces safety accidents caused by worker fatigue, ensuring the personal safety of construction personnel. When waterproof tarpaulins are laid manually, the tarpaulin is prone to wrinkles, loosening, or insecure fixing due to the skill level and physical strength of the workers, affecting the waterproofing effect. Rapid erection vehicles are equipped with precise tarpaulin tensioning devices and positioning systems, ensuring that the tarpaulin remains flat and taut throughout the laying process, with accurate fixing points and a much stronger fixation than manual operation. For example, in the waterproofing acceptance of an underground parking lot pit, the areas laid using the erection vehicle showed excellent waterproofing with no leaks, while some manually laid areas had a few leaks that required rework. The rapid-erecting vehicle utilizes a highly efficient power system, significantly reducing energy consumption compared to the energy consumed by traditional construction methods that involve large amounts of machinery running idle or frequent manual material handling. Furthermore, the increased construction efficiency reduces overall energy consumption throughout the project, aligning with the current trend of energy conservation and environmental protection in the construction industry. Moreover, the use of the vehicle reduces dust and noise pollution caused by long construction periods, minimizing its impact on the surrounding environment. This scaffolding vehicle can not only be used to lay waterproof tarpaulins, but with simple modifications or functional expansion, it can also lay other roll building materials such as thermal insulation felt and geotextile. This invention forms a track by setting up a laying arm mechanism. The telescopic arm can adapt to the length of the pit, and a pair of rope winding devices are set on the telescopic arm to adapt to the length of the telescopic arm and form a guide structure on the telescopic arm to pull the curtain open. The automated setting greatly improves the convenience of setting up the curtain in the air or laying it on the ground, which is conducive to rapid response and prevents the impact of sudden rainfall. Attached Figure Description

[0016] Figure 1 This is a side view of the vehicle used in this invention; Figure 2 This is a schematic diagram of the erection method of the present invention; Figure 3 This is a top view of the vehicle used in this invention; Figure 4 For the present invention Figure 3Schematic diagram of the deployment of the laying arm mechanism; Figure 5 For the present invention Figure 4 Partial schematic diagram of the middle laying arm mechanism and the curtain unrolling mechanism; Figure 6 For the present invention Figure 4 Enlarged view of the structure of section A in the middle; Figure 7 For the present invention Figure 5 Enlarged view of the structure of section B; Figure 8 This is a CC-direction view of the present invention (section 7). In the diagram: 1. Vehicle body; 11. Vehicle frame; 12. Support leg; 13. Lifting platform; 14. Rotating platform; 2. Curtain unwinding mechanism; 21. First bracket; 22. Unwinding roller; 23. Transmission disc; 24. Motor; 25. Tensioning drive component; 26. Tensioning roller; 3. Laying arm mechanism; 31. Second bracket; 32. Telescopic arm; 33. Angle adjustment device; 34. Rope winding device; 35. Roller; 36. Guide rope; 37. Box body; 38. Steering wheel; 39. Connecting part; 4. Support mechanism; 41. Base; 42. Support column; 43. Tension spring; 44. Track; 45. Flange; 46. Wedge pin; 5. Curtain; 51. Pull rope; 52. Fixing cylinder; 53. Limiting edge. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1 like Figure 1-8 As shown, a rapid erection vehicle for waterproof curtains in building foundation pits includes a vehicle body 1, as well as an installation arm mechanism 3 and a curtain unrolling mechanism 2 installed on the vehicle body 1. The laying arm mechanism 3 has at least two sets, including a telescopic arm 32 and a guide rope 36. The non-telescopic end of the telescopic arm 32 is provided with a pair of rope winding devices 34, and the telescopic end is provided with a steering wheel 38. The guide rope 36 passes through the steering wheel 38 and is connected to the two rope winding devices 34 at both ends. The curtain unwinding mechanism 2 is used to unwind the curtain 5, including an unwinding roller 22. Pull ropes 51 are provided at the two corners of the curtain 5. The pull ropes 51 are provided with fixing cylinders 52 for fixing to the guide ropes 36, so that the guide ropes 36 can pull the curtain 5 to unfold when unwinding.

[0019] This solution uses a laying arm mechanism 3 to form a track. The telescopic arm 32 can adapt to the length of the pit. A pair of rope winding devices 34 are installed on the telescopic arm 32 to adapt to the length of the telescopic arm 32 and form a guide structure on the telescopic arm 32 to pull the curtain open. The automated setting greatly improves the convenience of setting up the curtain in the air or laying it on the ground, which is conducive to rapid response and prevents the impact of sudden rainfall.

[0020] During implementation, the telescopic arm 32 extends in parallel to form a guide rail. During the extension process, the two rope winding devices 34 on the telescopic arm 32 unwind simultaneously to accommodate the extension of the telescopic arm 32. After the telescopic arm 32 is positioned, the pull rope 51 of the curtain 5 is fixed to the guide rope 36. Then, the two rope winding devices 34 unwind one and rewind the other to pull the pull rope 51 to the far end, completing the unfolding.

[0021] Optionally, the vehicle body 1 includes a frame 11 with two sets of steering tires and retractable support legs 12 located at the four corners of the frame 11. The frame 11 is the main support structure of the erecting vehicle, welded from high-strength steel, and has sufficient strength and rigidity to withstand various loads during the erecting vehicle's travel and operation. The wheels use wear-resistant and pressure-resistant rubber tires or solid tires to adapt to different construction site road conditions. Some erecting vehicles can be equipped with multiple sets of steering wheels to facilitate flexible turning of the vehicle around the pit. The support legs 12 are used to support the vehicle body and keep it stable. The support legs 12 adopt a telescopic structure and can adjust the height according to the terrain of the pit and the operation requirements. The bottom of the support legs 12 is equipped with anti-slip mats or support feet to increase the friction with the ground and the support area.

[0022] In addition, a reliable operation and control system is required, providing a safe and comfortable working environment. The operating platform can be located on the top or side of the erecting vehicle, equipped with various operating buttons, handles, and instrument panels to facilitate operators in controlling the vehicle's movement, curtain laying, and other functions. The control system coordinates and controls the operation of various components of the erecting vehicle, achieving automated or semi-automated operation. The control system can be an electrical control system, a hydraulic control system, or a PLC control system, etc., using sensors and controllers to monitor and adjust parameters such as the vehicle's speed, position, and tension in real time. A high-performance power unit is provided to offer ample power support for the entire vehicle. Simultaneously, an intelligent control system is introduced, allowing operators to precisely control the vehicle's travel speed, curtain laying speed, and the movement of the laying arm via the control panel, achieving automated construction.

[0023] Preferably, the curtain unwinding mechanism 2 further includes a first bracket 21 mounted on the vehicle body 1 and a motor 24 mounted on the first bracket 21. The unwinding roller 22 is mounted on the first bracket 21, and the end of the unwinding roller 22 is provided with a transmission disc 23 for transmission connection with the motor 24. In this solution, the curtain 5 is unwound by setting the motor 24. The transmission disc 23 can be a chain drive, gear drive or belt drive.

[0024] Optionally, the curtain unwinding mechanism 2 also includes a tensioning mechanism, which includes a tensioning drive 25 mounted on the first bracket 21 and a tensioning roller 26 mounted at the output end of the tensioning drive 25. The tensioning roller 26 is parallel to the unwinding roller 22. A pressure sensor is mounted on the tensioning roller 26. The tensioning mechanism is used to maintain the tension of the curtain 5 and prevent the curtain 5 from becoming loose or wrinkled. The tensioning drive 25 can be an adjustable spring, a hydraulic cylinder, or an electric telescopic rod. The motor 24 can also be equipped with a braking device and a speed regulating device to control the laying speed and stopping position of the curtain 5 in conjunction with the pressure sensor. When the pressure on the tensioning roller 26 is insufficient, the unwinding speed is reduced; when the pressure is too high, the unwinding speed is increased.

[0025] In addition, optionally, a positioning device can be installed on the vehicle body 1 to help the erecting vehicle accurately position itself at the edge of the pit or the location where the curtain 5 needs to be laid. The positioning device can be a laser positioning device, an ultrasonic positioning device, or a mechanical positioning device, etc. By cooperating with the markers or preset positioning points around the pit, the precise positioning of the erecting vehicle can be achieved. A lighting system and warning devices can also be installed. The lighting system provides illumination for the erecting vehicle when working at night or in low-light environments. The lighting system usually includes headlights, work lights, etc., to ensure that operators can clearly see the work area; the warning devices can be horns, warning lights, etc., used to issue warning signals during the movement and operation of the erecting vehicle to remind surrounding personnel to pay attention to safety.

[0026] Preferably, the vehicle body 1 is provided with a lifting platform 13, and the lifting end of the lifting platform 13 is provided with a rotating platform 14. The laying arm mechanism 3 includes a second bracket 31 provided on the rotating platform 14. The non-telescopic end of the telescopic arm 32 is rotatably provided on the second bracket 31, and an angle adjustment device 33 is provided between the second bracket 31 and the non-telescopic end of the telescopic arm 32. By providing the lifting platform 13, the height of the telescopic arm 32 can be adjusted. In addition to laying the curtain 5, the curtain 5 can also be erected in the air, or dustproof nets and sunshade nets can be erected in the air. The angle adjustment device is a hydraulic cylinder, which is used to adjust the elevation angle of the telescopic arm 32. The rotating platform 14 facilitates the rotation of the two laying arm mechanisms 3.

[0027] Optionally, the two laying arm mechanisms 3 can be housed on the same frame 11, or they can be set on two separate frames 11 as needed.

[0028] Preferably, the telescopic arm 32 has a housing 37 at its telescopic end, and at least two steering wheels 38 are provided inside the housing 37 to prevent the guide rope 36 from detaching from the steering wheels 38. The non-telescopic end of the telescopic arm 32 is also provided with an hourglass-shaped roller 35 to allow the guide rope 36 to enter the housing 37. This solution allows the guide rope 36 to adapt to the telescopic arm 32 as it extends and retracts by providing steering wheels 38 at the farthest end of the telescopic arm 32.

[0029] Preferably, the erecting vehicle also includes a liftable support mechanism 4, which is fixed to the ground or on a separate vehicle. The support mechanism 4 includes a base 41 and a support column 42 disposed on the base 41. The lifting end of the support column 42 is connected to the docking part 39 disposed at the bottom of the box 37 to support the non-extended end of the telescopic arm 32 after it is extended. This solution improves stability by setting a lifting support mechanism 4 to support the end of the telescopic arm 32 after it is extended.

[0030] Specific implementation method: Two laying arm mechanisms 3 are laid out in parallel on both sides of the foundation pit, and the telescopic arm 32 extends according to the length of the foundation pit. During the extension process, the two rope winding devices 34 on each telescopic arm 32 are unwound simultaneously. After the telescopic arm 32 is extended, the farthest end is supported by the support mechanism 4. The support mechanism 4 can be vehicle-mounted or placed on the ground. Then, the pull rope 51 at the end of the curtain 5 is fixed to the guide rope 36 by the fixing cylinder 52. The fixing cylinder 52 is fixed by two half-cylinders fastened together and then tightened with bolts. One end of the two rope winding devices 34 is unwound and the other end is wound up, so that the guide rope 36 is pulled to spread the end of the curtain 5 under tension. After reaching the position, if the curtain 5 / dustproof net / sunshade net needs to be erected in the air, the two ends of the telescopic arm 32 are raised. If the curtain 5 is to be laid on the slope of the foundation pit or on the concrete, the curtain 5 is lowered and the fixing cylinder 52 is released.

[0031] like Figure 2 As shown, in order to implement the above-mentioned device, the present invention also proposes a method for erecting a rapid erection vehicle for waterproof curtains in building foundation pits based on any of the above-mentioned methods, comprising the following steps: S1: Move the vehicle body 1 to both ends of the area to be covered at the edge of the pit, unfold the laying arm mechanism 3, align the laying arm mechanism 3 with the laying area of ​​the pit as the track for setting up the curtain 5, and guide the rope 36 to unwind during the unfolding of the laying arm mechanism 3. S2: Fix the pull rope 51 at the end of the curtain 5 to the guide rope 36 on the erection track, and then pull the curtain 5 along the telescopic arm 32 by unwinding one end of the guide rope 36 and rewinding the other end. S3: Position the curtain 5 and release the guide rope 36 to lower the curtain 5 into the area to be covered in the pit.

[0032] In this erection method, the vehicle body 1 can be configured with four sets, depending on mobility requirements or the width requirements of the curtain 5. Two sets are used for unrolling the curtain, and two sets are used for erecting the laying arm mechanism 3. The laying arm mechanism 3 has supports at both ends, improving mobility. Specialized tires and suspension systems can also be used, giving the vehicle body 1 good passability and stability in complex construction sites. A flexible steering system ensures the vehicle can turn freely in confined spaces, facilitating operations around the foundation pit. Pressure sensors and position sensors are installed on key components such as the curtain conveying system and the laying arm. The pressure sensors monitor the curtain tension in real time; when the tension exceeds a preset range, the conveying speed or tensioning device is automatically adjusted to ensure the flatness and stability of the curtain laying. The position sensors precisely control the position and angle of the laying arm, enabling it to accurately lay the curtain to the designated position in complex foundation pit environments, improving laying accuracy and reducing manual intervention.

[0033] This embodiment installs standard-height guardrails around the vehicle's operating platform and sets up warning signs to prevent operators from accidentally falling. Infrared sensors are installed within the laying arm's range of motion; when a person or object enters the danger zone, the equipment automatically stops to avoid collisions. Simultaneously, the vehicle is equipped with an emergency braking system; in case of an emergency, operators can quickly stop the vehicle using the emergency brake button, ensuring construction safety.

[0034] In addition to curtain 5, this solution can also be used to erect or lay the following materials: Thermal insulation felt: Similar to waterproof curtains, thermal insulation felt is usually sold in rolls. The curtain storage and conveying system of the rapid deployment vehicle can be directly applied to the storage and conveying of thermal insulation felt. The thermal insulation felt is unfolded and laid on the areas that need insulation, such as roofs and basement ceilings, using the laying arm.

[0035] Geotextiles: Geotextiles have excellent filtration, drainage, and isolation functions, and are widely used in foundation pit engineering and road engineering. Rapid erection vehicles can quickly lay geotextiles at the bottom of foundation pits or slopes, similar to laying waterproof tarpaulins, to prevent soil erosion, filter groundwater, and also as a means of isolating road base layers from soil layers, preventing different materials from mixing.

[0036] Geogrids: Geogrids generally have a mesh structure, high strength, and good durability. Rapid deployment vehicles can first install geogrid rolls on storage reels, and then, through vehicle movement and laying devices, quickly lay the geogrids in soft soil foundation treatment areas, roadbed filling sections, etc., to improve the stability and bearing capacity of the foundation.

[0037] SBS waterproof membrane: This type of membrane is one of the most commonly used materials in building waterproofing projects. Quick-lay vehicles can be equipped with heating devices to heat the SBS waterproof membrane during installation, allowing it to bond better to the substrate. The vehicle's laying arm can control the direction and speed of the membrane's installation, ensuring a smooth, wrinkle-free finish and improving waterproofing effectiveness.

[0038] Polymer waterproof membranes, such as PVC waterproof membranes and TPO waterproof membranes, are relatively lightweight and flexible. Rapid installation vehicles utilize their transport and laying systems to quickly lay polymer waterproof membranes on waterproof areas such as roofs and underground projects. By adjusting the pressure of the clamping device, the membrane is ensured to adhere tightly to the substrate.

[0039] Safety nets: During construction, safety nets are installed on building facades, stairwells, elevator shafts, and other locations to ensure the safety of construction workers. Rapid deployment vehicles can quickly unfold and secure the safety nets in their designated positions by adjusting the installation mechanism, forming an effective safety barrier.

[0040] Protective grating: For areas that require protection and isolation, such as the area around foundation pits or dangerous areas on construction sites, the quick-setup vehicle can quickly lay and install the protective grating, which serves as isolation and warning, preventing people and objects from accidentally falling or entering the dangerous area.

[0041] Example 2 Unlike Embodiment 1, this solution also provides a vertical track 44 on the base 41, a flange 45 on the opposite side of the track 44, and a limiting edge 53 at the end of the fixed cylinder 52. The track 44 and the flange 45 are used to restrict the fixed cylinder 52 to move only vertically after the limiting edge 53 enters the track 44. By setting the vertical track 44, this solution restricts the fixed cylinder 52 to return when it reaches the end point, so that the curtain 5 can remain taut during the downward lowering process.

[0042] The top two sides of the track 44 are provided with wedge pins 46 that allow one-way entry of the active limit edge 53. The wedge pins 46 are pulled into the inner side of the track 44 by the tension spring 43 located on the outer side of the track 44 to prevent the entering limit edge 53 from returning. This solution specifically sets up a structure to limit the return of the fixed cylinder.

[0043] Working principle: such as Figure 5-6 As shown, when the fixed cylinder 52 is pulled to the end point, the limiting edge 53 pushes open the wedge pin 46 and enters the track 44. At this time, the curtain 5 needs to be laid downwards to cover the pit or slope. If the curtain 5 is released downwards by unwinding the unwinding roller 22, as... Figure 3From a perspective, the curtain 5 is arc-shaped and will touch the bottom in the middle during the descent. Then it will continue to descend and slide to the left. In this design, the return of the fixed cylinder 52 is restricted, so that the fixed cylinder 52 can only descend. When the curtain 5 is released, the upper rope winding device 34 unwinds, so that the fixed cylinder 52 slides down along the track 44 without being pulled back by the curtain 5. The end of the curtain 5 closest to the fixed cylinder 52 descends to the bottom first, and then the curtain unwinding mechanism 2 on the right side unwinds. The curtain gradually touches the bottom from the left and covers the un-set concrete without relative sliding, which is beneficial to protecting the concrete in the foundation pit.

[0044] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A rapid erection vehicle for waterproof curtains in building foundation pits, comprising a vehicle body (1), characterized in that, It also includes the components installed on the vehicle body (1). The laying arm mechanism (3) has at least two sets, including a telescopic arm (32) and a guide rope (36). The non-telescopic end of the telescopic arm (32) is provided with a pair of rope winding devices (34), and the telescopic end is provided with a steering wheel (38). The guide rope (36) passes through the steering wheel (38) and is connected at both ends to the two rope winding devices (34). The curtain unwinding mechanism (2) is used to unwind the curtain (5) and includes an unwinding roller (22). Pull ropes (51) are provided at the two corners of the ends of the curtain (5). A fixing cylinder (52) is provided on the pull rope (51) for fixing to the guide rope (36) so that the guide rope (36) can pull the curtain (5) to unfold when unwinding.

2. The rapid erection vehicle for waterproof curtains in building foundation pits according to claim 1, characterized in that, The vehicle body (1) includes a frame (11) with two sets of steering tires and retractable support legs (12) located at the four corners of the frame (11).

3. The rapid erection vehicle for waterproof curtains in building foundation pits according to claim 1, characterized in that, The curtain unwinding mechanism (2) also includes a first bracket (21) mounted on the vehicle body (1) and a motor (24) mounted on the first bracket (21). The unwinding roller (22) is mounted on the first bracket (21), and the end of the unwinding roller (22) is provided with a transmission disc (23) for transmission connection with the motor (24).

4. The rapid erection vehicle for waterproof curtains in building foundation pits according to claim 3, characterized in that, The curtain unwinding mechanism (2) also includes a tensioning mechanism, which includes a tensioning drive (25) mounted on the first bracket (21) and a tensioning roller (26) mounted on the output end of the tensioning drive (25). The tensioning roller (26) is parallel to the unwinding roller (22), and a pressure sensor is mounted on the tensioning roller (26).

5. The rapid erection vehicle for waterproof curtains in building foundation pits according to claim 1, characterized in that, The vehicle body (1) is provided with a lifting platform (13), and the lifting end of the lifting platform (13) is provided with a rotating platform (14). The laying arm mechanism (3) includes a second bracket (31) provided on the rotating platform (14). The non-telescopic end of the telescopic arm (32) is rotatably provided on the second bracket (31), and an angle adjustment device (33) is provided between the second bracket (31) and the non-telescopic end of the telescopic arm (32).

6. The rapid erection vehicle for waterproof curtains in building foundation pits according to claim 5, characterized in that, The telescopic arm (32) has a box (37) at its telescopic end, and at least two steering wheels (38) are provided inside the box (37) to prevent the guide rope (36) from detaching from the steering wheel (38). The non-telescopic end of the telescopic arm (32) is also provided with an hourglass-shaped roller (35) to allow the guide rope (36) to enter the box (37).

7. A rapid erection vehicle for waterproof curtains in building foundation pits according to claim 6, characterized in that, It also includes a liftable support mechanism (4), which is fixed to the ground or on a separate vehicle. The support mechanism (4) includes a base (41) and a support column (42) disposed on the base (41). The lifting end of the support column (42) is connected to a docking part (39) disposed at the bottom of the box body (37) to support its non-telescopic end after the telescopic arm (32) is extended.

8. A rapid erection vehicle for waterproof curtains in building foundation pits according to claim 7, characterized in that, The base (41) is also provided with a vertical track (44), and a flange (45) is provided on the opposite side of the track (44). The end of the fixed cylinder (52) is provided with a limiting edge (53). The track (44) and the flange (45) are used to restrict the fixed cylinder (52) to move only vertically after the limiting edge (53) enters the track (44).

9. A rapid erection vehicle for waterproof curtains in building foundation pits according to claim 8, characterized in that, The top two sides of the track (44) are provided with wedge pins (46) that allow one-way entry of the active limit edge (53). The wedge pins (46) are pulled into the inner side of the track (44) by the tension spring (43) located on the outside of the track (44) to prevent the entering limit edge (53) from returning.

10. A method for erecting a rapid-erection vehicle for waterproof curtains in building foundation pits based on any one of claims 9, characterized in that, Includes the following steps: S1: Move the vehicle body (1) to both ends of the area to be covered at the edge of the pit, unfold the laying arm mechanism (3), align the laying arm mechanism (3) with the laying area of ​​the pit as the track for setting up the curtain (5), and unwind the guide rope (36) during the unfolding process of the laying arm mechanism (3). S2: Connect the pull rope (51) at the end of the curtain (5) to the guide rope (36) on the erection track, and then pull the curtain (5) along the telescopic arm (32) by unwinding one end of the guide rope (36) and rewinding the other end. S3: Position the curtain (5) and release the guide rope (36) to lower the curtain (5) into the area to be covered in the pit.

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