A safety hoisting device for civil engineering

Abstract

The application belongs to the field of building construction equipment and discloses a safe lifting device for civil engineering, which comprises a derrick, a lifting cage, a controller, a fall protector, a pulley mechanism, a power mechanism and a counterweight mechanism, the top plate is of a groove type structure and is provided with a plurality of U-shaped rods on four sides, rollers that roll with the derrick are arranged on the U-shaped rods, a secondary braking mechanism is arranged on the lifting cage, the secondary braking mechanism comprises four sliding grooves, the openings of the sliding grooves face the inner side surface of the derrick, a sliding brake plate is arranged in the sliding grooves, a brake rope is arranged at the bottom of the sliding brake plate, a self-locking assembly that cooperates with the brake rope is arranged in the inside of the cage body, the bottom end of the brake rope extends to a storage box at the center of the bottom of the cage body in a diagonal direction, a brake starting assembly that is connected with the brake rope is arranged in the storage box, and a guardrail mechanism that is used to be connected with a stopping layer platform is arranged on the outside of the derrick. The device is reasonable in design, high in braking safety, high in stopping layer safety and high in grounding safety, and is suitable for large-scale promotion.

Description

Technical Field

[0001] This invention belongs to the field of construction equipment, and particularly relates to a safety lifting device for civil engineering projects. Background Technology

[0002] Civil engineering is a general term encompassing civil engineering and building engineering. It refers to the construction of various facilities and sites for human life, production, and protection activities. It covers the construction of buildings, structures, and engineering works within the scope of above-ground, underground, land, water, and underwater projects, including houses, roads, railways, airports, bridges, water conservancy projects, ports, tunnels, water supply and drainage systems, and protective structures. It includes both the technical activities of surveying, design, construction, maintenance, and management during the construction process, as well as the materials, equipment, and supplies consumed during construction. When constructing high-rise buildings, in addition to tower cranes, it is also necessary to install outdoor elevators capable of vertical lifting. Outdoor elevators are mainly used for lifting materials and workers and can be divided into single-column double-cage elevators, derrick elevators, and gantry elevators.

[0003] Currently, derrick hoists generally include a derrick, a hoisting cage located within the derrick, a controller located within the hoisting cage, a power mechanism and counterweight mechanism located outside the derrick, and a speed-differential fall arrestor connecting the hoisting cage and the derrick. Both the counterweight mechanism and the fall arrestor play a role in safe lifting and lowering, especially the fall arrestor, which can automatically activate upon detecting abnormal speed differences to achieve immediate braking. However, since the fall arrestor is the main braking component, after braking, some unstable factors within the hoisting cage can still cause it to slip a certain distance, thus the safety of the hoisting cage after braking needs improvement. Secondly, the connection between the hoisting cage and the landing platform is achieved by flipping the side door of the hoisting cage, but there is a lack of effective protection on both sides of the connection section, so the safety of personnel and materials moving between the landing platforms also needs improvement. Summary of the Invention

[0004] In view of the technical problems existing in the above-mentioned hoists, the present invention proposes a safety lifting device for civil engineering with reasonable design, high braking safety, high stopping safety and high grounding safety.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a safety lifting device for civil engineering, including a hoist frame, in which a lifting cage is installed. The lifting cage includes a base, a cage body, and a top plate connected from bottom to top. A front door and a rear door are provided on the front and rear sides of the cage body. A controller is installed in the lifting cage, and a fall arrestor is installed on the lifting cage. A power mechanism and a counterweight mechanism connected to the lifting cage via a pulley mechanism are installed on the outside of the hoist frame. The top plate has a groove-shaped structure, and multiple U-shaped rods are provided on the four sides of the top plate. Rollers that roll with the hoist frame are provided on the U-shaped rods. The lifting cage is equipped with a secondary braking mechanism, which includes four symmetrically distributed sliding grooves on the left and right sides of the top plate. The openings of the sliding grooves face the inner side of the derrick. A sliding brake plate is installed in the sliding groove. A brake rope running from top to bottom through the cage is installed at the bottom of the sliding brake plate. A self-locking component that cooperates with the brake rope is installed inside the cage. The bottom end of the brake rope extends diagonally to the bottom center of the cage. A storage box is installed at the bottom center of the cage. A brake activation component is installed in the storage box. A guardrail mechanism for connecting to the landing platform is installed on the outside of the derrick.

[0006] Preferably, V-shaped compression springs are provided on both sides of the sliding brake plate. One end of the compression spring is fixedly connected to the sliding brake plate, and the other end is a free end. The opening of the compression spring faces the sliding brake plate.

[0007] Preferably, the self-locking assembly includes a self-locking canister connected to the cage, and the interior of the self-locking canister is provided with a spring clamp of an inverted cone structure.

[0008] Preferably, the inner wall of the spring collet is provided with clamping threads, the side of the spring collet is provided with four evenly distributed variable gap openings, the bottom of the self-locking can is provided with a cross-shaped unlocking plate that engages with the variable gap openings, the cross-shaped unlocking plate has a triangular cross section, and the top of the self-locking can is provided with an unlocking hole that communicates with its interior.

[0009] Preferably, the brake actuation assembly includes a spindle, and a handwheel is provided on the top of the spindle.

[0010] Preferably, the bottom of the cage is provided with protective square tubes arranged diagonally, which are connected to the storage box and used to protect the brake rope.

[0011] Preferably, the guardrail mechanism includes a U-shaped guardrail, with a supporting square tube at the bottom of the guardrail, a supporting plate inside the supporting square tube, a steel pipe at one end of the supporting plate for connecting to the landing platform, and a Z-shaped plate on the side of the supporting plate that cooperates with the outer side of the guardrail.

[0012] Preferably, the bottom of the derrick is provided with a buffer seat, and the bottom of the buffer seat is provided with multiple grounding springs.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0014] 1. This invention provides a safety lifting device for civil engineering projects. The U-shaped rod and rollers improve the smoothness of the lifting cage's ascent and descent within the derrick, preventing violent collisions. The secondary braking mechanism can be manually activated after the fall arrestor automatically brakes, preventing prolonged slippage of the lifting cage after braking and improving the braking effect of the lifting cage within the derrick. The guardrail mechanism, serving as the connection between this device and the landing platform, effectively enhances the safety of personnel and materials walking on the landing platform. This device is rationally designed, offers high braking safety, high landing safety, and high grounding safety, making it suitable for large-scale promotion. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 An isometric drawing of a safety lifting device for civil engineering provided as an embodiment;

[0017] Figure 2 A side view of a safety lifting device for civil engineering provided as an embodiment;

[0018] Figure 3 A front view of a safety lifting device for civil engineering provided as an embodiment;

[0019] Figure 4 An isometric view of the lifting cage provided for an embodiment;

[0020] Figure 5 A partial sectional view of a safety lifting device for civil engineering provided as an embodiment;

[0021] Figure 6 An isometric view of the secondary braking mechanism provided in the embodiment;

[0022] Figure 7 An isometric view of the guardrail mechanism (without guardrail) provided in the embodiment;

[0023] Figure 8 A cross-sectional view of the self-locking mechanism provided in the embodiment;

[0024] Figure 9An isometric view of the self-locking mechanism provided in the embodiment;

[0025] Figure 10 Axonometric drawing of the fall arrester provided for the embodiment;

[0026] In the above figures, 1. Derrick; 2. Lifting cage; 21. Base; 22. Cage body; 23. Top plate; 24. Front door; 25. Rear door; 26. U-shaped rod; 27. Roller; 3. Controller; 4. Fall arrestor; 5. Power mechanism; 6. Counterweight mechanism; 7. Secondary braking mechanism; 71. Slide groove; 72. Sliding brake plate; 73. Brake rope; 74. Self-locking assembly; 741. Self-locking can; 742. Spring collet; 743. Cross-shaped unlocking plate; 744. Unlocking hole; 75. Storage box; 76. Brake start assembly; 761. Spindle; 762. Handwheel; 77. Compression spring; 8. Guardrail mechanism; 81. Guardrail; 82. Support square tube; 83. Support plate; 84. Steel pipe; 85. Z-shaped plate; 9. Protective square tube; 10. Buffer seat; 11. Grounding spring. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0029] Examples, such as Figures 1-10 As shown, the present invention provides a safety lifting device for civil engineering, including a hoist 1. A lifting cage 2 is installed within the hoist 1. The lifting cage 2 includes a base 21, a cage body 22, and a top plate 23 connected from bottom to top. A front door 24 and a rear door 25 are provided on the front and rear sides of the cage body 22. A controller 3 is installed within the lifting cage 2, and a fall arrestor 4 is installed on the lifting cage 2. A power mechanism 5 and a counterweight mechanism 6, connected to the lifting cage 2 via a pulley mechanism, are installed outside the hoist 1. The hoist 1, controller 3, fall arrestor 4, pulley mechanism, power mechanism 5, and counterweight mechanism 6 are existing technologies and will not be described in detail here. Based on this, the top plate 23 of the present invention has a groove-shaped structure, which increases its contact area with the hoist 1. Furthermore, multiple U-shaped rods are installed on its four sides, with rollers on the U-shaped rods that roll in contact with the hoist 1, effectively improving the smoothness of the lifting cage 2's movement along the vertical direction of the hoist 1.

[0030] To improve the braking safety of this device, the lifting cage 2 provided by this invention is equipped with a secondary braking mechanism 7. The secondary braking mechanism 7 includes four symmetrically distributed sliding grooves 71 on the left and right sides of the top plate 23. The openings of the sliding grooves 71 face the inner side of the derrick 1. A sliding brake plate 72 is provided in the sliding groove 71. A brake rope 73 is provided at the bottom of the sliding brake plate 72, running from top to bottom through the cage body 22. A self-locking component 74 that cooperates with the brake rope 73 is provided inside the cage body 22. The bottom end of the brake rope 73 extends diagonally to the bottom center of the cage body 22. A storage box 75 is provided at the bottom center of the cage body 22. A brake activation component 76 is provided in the storage box 75. A guardrail mechanism 8 for connecting with the landing platform is provided on the outside of the derrick 1. The guardrail mechanism 8 serves as the connection mechanism between this device and the landing platform, which can effectively improve the safety of personnel and materials walking on the landing platform, thus ensuring high landing safety.

[0031] Specifically, the manual rotation of the brake activation component 76 pulls the brake rope 73, which moves vertically along the self-locking component 74. The self-locking component 74 provides anti-reverse braking to the brake rope 73, causing the brake rope 73 to pull the sliding brake plate 72 out of the slide groove 71 and into the structural gap of the derrick 1. In this way, the secondary braking mechanism 7 can be manually activated in case of long-distance slippage due to instability in the fall arrestor 4. For even greater safety, it can be manually activated directly after the fall arrestor 4 has automatically braked, avoiding delays in emergency braking due to delayed activation. The two braking mechanisms ensure the braking safety of this device in the derrick 1.

[0032] To improve the braking effect of the secondary braking mechanism 7, in addition to the self-locking component 74, the present invention also provides V-shaped compression springs 77 on both sides of the sliding brake plate 72. One end of the compression spring 77 is fixedly connected to the sliding brake plate 72, and the other end is a free end. The opening of the compression spring 77 faces the sliding brake plate 72. The compression spring 77 can ensure the accurate positioning of the sliding brake plate 72 under safe conditions. In the event of emergency braking by the brake rope 73 pulling the sliding brake plate 72, the compression spring 77 can wedge into the inner wall of the slide groove 71, increasing the friction of the sliding brake plate 72 in the slide groove 71 and preventing the sliding brake plate 72 from unsafely exiting the braking node.

[0033] To improve the utilization rate of the self-locking assembly 74, the self-locking assembly 74 provided by the present invention includes a self-locking can 741 connected to the cage 22, and a spring clamp 742 with an inverted conical structure is provided inside the self-locking can 741. The minimum inner diameter of the spring clamp 742 is always frictionally clamped with the brake rope 73, and the upward pulling force of the brake rope 73 will only make it clamp tighter and tighter with the spring clamp 742. Therefore, the self-locking assembly 74 can maintain good self-locking performance when unlocked without manual intervention.

[0034] Furthermore, the present invention provides a clamping thread on the inner wall of the spring collet 742, which helps to improve the clamping stability between the spring collet 742 and the brake rope 73. Simultaneously, the side of the spring collet 742 is provided with four evenly distributed variable-gap openings, and the bottom of the self-locking canister 741 is provided with a cross-shaped unlocking plate 743 that engages with the variable-gap openings. The cross-shaped unlocking plate 743 has a triangular cross-section, and the top of the self-locking canister 741 is provided with an unlocking hole 744 that communicates with its interior. By inserting a rod-shaped key into the unlocking hole 744 from top to bottom, the spring collet 742 can be moved downwards. The variable-gap opening of the spring collet 742 can wedge onto the cross-shaped unlocking plate 743, and the further downward the spring collet 742 moves, the wider its minimum clamping inner diameter is expanded, thereby achieving the purpose of unlocking the spring collet 742 and the brake rope 73.

[0035] To improve the synchronous linkage effect of the brake actuation assembly on the brake ropes 73, the brake actuation assembly 76 provided by this invention includes a spindle 761, and a handwheel 762 is provided on the top of the spindle 761. Meanwhile, the top surface of the handwheel 762 does not protrude from the inner bottom surface of the lifting cage 2, but is instead recessed in the storage box 75. In an emergency, manually rotating the handwheel 762 can wind all the brake ropes 73 onto the spindle 761, and these brake ropes 73 will not automatically unwind when the self-locking assembly 74 is engaged.

[0036] In order to improve the safety of the brake rope 73 and extend its actual service life, the present invention provides diagonally distributed protective square tubes 9 at the bottom of the cage 22. The protective square tubes 9 are connected to the storage box 75 and are used to protect the brake rope 73.

[0037] To improve the safety of the device at the landing level, the guardrail mechanism 8 provided by this invention includes a U-shaped guardrail 81. A supporting square tube 82 is provided at the bottom of the guardrail 81, and a supporting plate 83 is provided inside the supporting square tube 82. A steel pipe 84 for connecting to the landing platform is provided at one end of the supporting plate 83, and a Z-shaped plate 85 that cooperates with the outer side of the guardrail is provided on the side of the supporting plate 83. The steel pipe 84 can be connected to the supporting platform using construction clamps or welding. The steel pipe 84 is welded to the supporting plate 83, and the supporting plate 83 simultaneously supports the bottom and sides of the guardrail. The guardrail provides protection on three sides, which helps improve the safety of personnel and materials moving between the derrick 1 and the landing platform.

[0038] To improve the grounding safety of this device, a buffer seat is provided at the bottom of the derrick 1, and multiple grounding springs 11 are provided at the bottom of the buffer seat 10. By designing the buffer seat 10 to increase its contact area with the bottom of the lifting cage 2, it is beneficial to improve the uniformity of the pressure exerted by the grounding springs 11 on the lifting cage 2, thereby providing a safe buffer for the moment of grounding of the lifting cage 2, and thus achieving the purpose of improving the grounding safety of this device.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A safety lifting device for civil engineering projects, comprising a hoist frame, a lifting cage disposed within the hoist frame, the lifting cage comprising a base, a cage body, and a top plate connected from bottom to top, a front door and a rear door disposed on the front and rear sides of the cage body, a controller disposed within the lifting cage, a fall arrestor disposed on the lifting cage, and a power mechanism and a counterweight mechanism externally disposed on the hoist frame and connected to the lifting cage via a pulley mechanism, characterized in that... The top plate has a groove-shaped structure, with multiple U-shaped rods on its four sides. Rollers that roll with the derrick are mounted on the U-shaped rods. The lifting cage is equipped with a secondary braking mechanism, which includes four symmetrically distributed sliding grooves on the left and right sides of the top plate. The openings of the sliding grooves face the inner side of the derrick. A sliding brake plate is installed in each sliding groove. V-shaped compression springs are installed on both sides of the sliding brake plate. One end of each compression spring is fixedly connected to the sliding brake plate, while the other end is free. The opening of the compression spring faces the sliding brake plate. A brake rope runs from top to bottom through the cage at the bottom of the sliding brake plate. A self-locking assembly that works with the brake rope is installed inside the cage. The bottom end of the brake rope extends diagonally to the bottom center of the cage. A storage box is located at the bottom center of the cage, containing a brake activation assembly. The brake activation assembly includes a spindle, with a handwheel at the top. A guardrail mechanism for connecting to the landing platform is installed on the outer side of the derrick.

2. The safety lifting device for civil engineering according to claim 1, characterized in that, The self-locking assembly includes a self-locking canister connected to the cage, and the interior of the self-locking canister is provided with a spring clamp of an inverted cone structure.

3. A safety lifting device for civil engineering projects according to claim 2, characterized in that, The inner wall of the spring collet is provided with clamping threads, and the side of the spring collet is provided with four evenly distributed variable gap openings. The bottom of the self-locking can is provided with a cross-shaped unlocking plate that matches the variable gap openings. The cross-shaped unlocking plate has a triangular cross section, and the top of the self-locking can is provided with an unlocking hole that communicates with its interior.

4. A safety lifting device for civil engineering projects according to claim 3, characterized in that, The bottom of the cage is provided with protective square tubes arranged diagonally. These protective square tubes are connected to the storage box and are used to protect the brake rope.

5. A safety lifting device for civil engineering projects according to claim 1, characterized in that, The guardrail mechanism includes a U-shaped guardrail, with a supporting square tube at the bottom of the guardrail, a supporting plate inside the supporting square tube, a steel pipe at one end of the supporting plate for connecting to the landing platform, and a Z-shaped plate on the side of the supporting plate that matches the outer side of the guardrail.

6. A safety lifting device for civil engineering projects according to claim 1, characterized in that, The bottom of the derrick is equipped with a buffer seat, and the bottom of the buffer seat is equipped with multiple grounding springs.

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