Waterproof roll paving device for structural side wall
By combining a counterbalanced electric single-arm crane and a membrane roll rack, the problem of laying waterproof membrane in confined spaces was solved, enabling effective application of waterproof membrane on the side walls of underground structures and improving construction efficiency and safety.
Patent Information
- Application Number
- CN202520170324.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-25
AI Technical Summary
Some waterproof membrane installation devices on the market are difficult to apply in the narrow spaces of underground structures, making it difficult to effectively lay waterproof membranes.
A counterbalanced electric single-arm crane is used in conjunction with a roll material frame. The stability is enhanced by counterweights and alloy cones, and the waterproof roll material is supported by springs and bearings. Electric lifting wheels and alloy cones are used to increase friction, enabling the waterproof roll material to be laid close to the wall in confined spaces.
This technology enables the effective application of waterproof membrane on the side walls of underground structures, improving construction efficiency and safety while ensuring waterproofing effectiveness.
Smart Images

Figure CN223937158U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waterproof membrane construction, and in particular relates to a device for laying waterproof membrane on structural side walls. Background Technology
[0002] In recent years, with the increase in underground utility tunnels, traffic tunnels, and tunnel projects, these structures are typically constructed using reinforced concrete cast-in-place. Given that these structures need to be buried deep underground, waterproof membranes must be laid around their perimeter to ensure the internal space is protected from groundwater erosion. The installation of waterproof membranes is crucial for protecting structural safety, extending service life, and maintaining the dryness of the underground space. However, due to the limited working space within trenches, some commercially available waterproof membrane installation devices are difficult to apply. Summary of the Invention
[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a device for laying waterproof membrane on structural sidewalls.
[0004] This invention is achieved through the following technical solution:
[0005] A structural sidewall waterproof membrane laying device includes a counterbalanced electric single-arm crane. Two counterweight balance bars are symmetrically threaded onto the rear side of the crane body. Counterweights are placed on the balance bars. The crane's hook is connected to a membrane frame via a wire rope. The membrane frame includes two L-shaped support frames. Lifting rings are fixed to the upper ends of the two L-shaped support frames, and wire ropes are connected to the lifting rings. The bottoms of the two L-shaped support frames are connected together by a horizontal support bar. The bottom of one L-shaped support frame... A fixed support column is fixed to the inner end of one L-shaped support frame, and a movable support column is provided at the bottom inner end of another L-shaped support frame. Both the fixed and movable support columns are equipped with bearings at their ends. The L-shaped support frame corresponding to the movable support column has a round hole, through which the movable support column extends outward. A spring is fitted on the movable support column, with one end of the spring fixed to the bearing and the other end fixed to the L-shaped support frame. A hanging ring is provided on the horizontal support rod of the L-shaped support frame, and a counterweight is hung on the hanging ring.
[0006] Preferably, the wheels of the counterbalanced electric single-arm crane are electric lifting wheels.
[0007] Preferably, the counterbalanced electric single-arm crane has alloy cones symmetrically arranged at the four corners of its bottom surface, with the bottom of the alloy cones being higher than the bottom of the wheels after landing.
[0008] Preferably, the alloy cone-shaped fixing bolt is threadedly connected to the bottom surface of the counterbalanced electric single-arm crane.
[0009] Preferably, the L-shaped support frame is provided with diagonal support rods.
[0010] The waterproof membrane laying device of this invention combines existing counterbalanced electric single-arm crane equipment, enabling the device to move electrically, and also has anti-tipping devices such as counterweights and alloy cones; the membrane frame of the waterproof membrane laying device of this invention can be placed in the narrow space of the trench, and during use, the waterproof membrane can be adjusted to be close to the side wall of the structure by the counterweight, so that workers can better lay and compact it. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the counterbalanced electric single-arm crane structure in this embodiment;
[0012] Figure 2 This is a schematic diagram of the roll material rack structure in this embodiment;
[0013] Figure 3 This is a schematic diagram of the roll material rack from another angle in this embodiment.
[0014] In the diagram, 1 is a counterbalanced electric single-arm crane, 2 is a counterweight balance bar, 3 is a hook, 4 is a wire rope, 5 is an L-shaped support frame, 6 is a lifting ring, 7 is a horizontal support bar, 8 is a fixed support column, 9 is a movable support column, 10 is a bearing, 11 is a spring, 12 is a hanging ring, 13 is a counterweight block, 14 is an alloy cone, 15 is a wheel, and 16 is an inclined support bar. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.
[0016] This embodiment includes a counterbalanced electric single-arm crane 1. A small, commercially available counterbalanced electric single-arm crane 1 is sufficient, allowing for easy movement on the top surface of the structure; further details are omitted here. To further enhance the anti-tipping capability of the counterbalanced electric single-arm crane 1, two counterweight balance bars 2 are preferably symmetrically threaded onto both sides of the rear side of the crane body. Counterweights are placed on the two balance bars 2 to prevent the crane body from tipping forward. Here, "forward" refers to the direction towards the side wall of the structure where waterproof membrane will be laid. In addition to the above, the wheels 15 of the counterbalanced electric single-arm crane 1 can also be configured as electric lifting wheels. Electric lifting wheels are common components, and their structure will not be described here. The wheels 15 can retract upwards into the crane body, allowing the bottom surface of the crane body to touch the ground, increasing friction. More preferably, alloy cones 14 are symmetrically provided at the four corners of the bottom surface of the counterbalanced electric single-arm crane 1. The alloy cones 14 are detachable, and bolts are fixed upwards to the alloy cones 14. The bolts are threadedly connected to the bottom surface of the counterbalanced electric single-arm crane 1. When the wheels 15 of the counterbalanced electric single-arm crane 1 are completely lowered, the bottom of the alloy cones 14 is higher than the bottom of the lowered wheels 15. At this time, the wheels 15 are on the ground, and the alloy cones 14 have no effect. However, when the wheels 15 are raised, the alloy cones 14 are on the ground, which greatly increases the friction and further prevents the crane from tipping forward.
[0017] This embodiment also includes a roll material frame, which includes two L-shaped support frames 5, each with a diagonal support rod 16. A lifting ring 6 is fixed to the upper end of each L-shaped support frame 5, and the lifting ring 6 is connected to a steel wire rope 4. The steel wire rope 4 is connected to the hook 3 of a counterbalanced electric single-arm crane 1, enabling the counterbalanced electric single-arm crane 1 to lift the roll material frame. The bottoms of the two L-shaped support frames 5 are connected together by several horizontal support rods 7. A fixed support column 8 is fixed to the inner bottom end of one L-shaped support frame 5, and a movable support column 9 is provided at the inner bottom end of the other L-shaped support frame 5. A circular hole is provided on the L-shaped support frame 5 corresponding to the movable support column 9, and the movable support column 9 extends outward through the circular hole, allowing it to slide within the circular hole. Bearings 10 are installed at the ends of both the fixed support column 8 and the movable support column 9. The outer ring of the bearing 10 is rotatable. A spring 11 is fitted onto the movable support column 9. One end of the spring 11 is fixed to the inner ring of the bearing 10 on the movable support column 9, and the other end of the spring 11 is fixed to the inner side of the L-shaped support frame 5. A hanging ring 12 is provided on the horizontal support rod 7 of the L-shaped support frame 5. A counterweight 13 is hung on the hanging ring 12. The counterweight 13 is used to adjust the tilt angle of the roll material frame so that the waterproof roll material can be close to the side wall surface of the structure.
[0018] In use, the counterbalanced electric single-arm crane 1 is placed on the top plate of the structure. After adjusting the position of the hook 3, a counterweight is placed on the counterweight balance bar 2. The wheels 15 are raised so that the alloy cone 14 touches the ground. Then, the two lifting rings 6 of the roll material frame are connected to the hook 3 of the counterbalanced electric single-arm crane 1 via a steel wire rope 4. The bearing 10 of the roll material frame faces the side wall of the structure to be laid. The counterbalanced electric single-arm crane 1 is operated to lower the roll material frame to the bottom of the side wall of the structure. Then, the worker first puts one end of the waterproof roll material onto the fixed support column 8 and bearing 10 on one side, and presses the bearing 10 on the other side outward by hand to make the bearing 10 and the movable support column 9 slide horizontally. At this time, the spring 11 is compressed, and the waterproof roll material core is placed directly opposite the movable support column 9. After the support column 9 is in position, release the pressing hand. Due to the elasticity of the spring 11, the movable support column 9 returns to its original position. The movable support column 9 and the bearing 10 enter the waterproof membrane roll. At this time, the waterproof membrane is supported by the two bearings 10 and can rotate around the bearings 10. After the waterproof membrane is installed, the workers below hang the counterweight 13 on the membrane frame. The weight of the counterweight 13 is selected according to the situation to make the waterproof membrane close to the side wall of the structure. The workers below hold the bottom end of the waterproof membrane, and then the counterweight electric single-arm crane 1 slowly lifts the membrane frame upward. The waterproof membrane slowly unfolds along the wall. The workers use the vertical membrane pressure roller to roll the waterproof membrane upward for laying.
[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A device for laying waterproof membrane on structural sidewalls, characterized in that: The system includes a counterbalanced electric single-arm crane (1), on which two counterweight balance bars (2) are symmetrically threaded on both sides of the rear side of the vehicle body. Counterweights are placed on the two counterweight balance bars (2). The hook (3) of the counterbalanced electric single-arm crane (1) is connected to a roll material frame via a wire rope (4). The roll material frame includes two L-shaped support frames (5). A lifting ring (6) is fixed to the upper end of the two L-shaped support frames (5). The lifting ring (6) is connected to the wire rope (4). The bottom of the two L-shaped support frames (5) is connected together by a horizontal support bar (7). A fixed support column (8) is fixed to the inner end of the bottom of one L-shaped support frame (5). The bottom inner end of the L-shaped support frame (5) is provided with a movable support column (9). The fixed support column (8) and the movable support column (9) are both equipped with bearings (10). The L-shaped support frame (5) corresponding to the movable support column (9) is provided with a round hole. The movable support column (9) extends outward through the round hole. A spring (11) is sleeved on the movable support column (9). One end of the spring (11) is fixed to the bearing (10), and the other end of the spring (11) is fixed to the L-shaped support frame (5). The horizontal support rod (7) of the L-shaped support frame (5) is provided with a hanging ring (12), and a balance weight (13) is hung on the hanging ring (12).
2. The structural sidewall waterproof membrane laying device according to claim 1, characterized in that: The wheels (15) of the counterbalanced electric single-arm crane (1) are electric lifting wheels.
3. The structural sidewall waterproof membrane laying device according to claim 1, characterized in that: The L-shaped support frame (5) is provided with a diagonal support rod (16).